JPS5898532A - Quick coupler - Google Patents

Abstract

PURPOSE:To eliminate a backlash and to prevent deformation and damage of an engaging pin, by constituting a coupler in the manner that an appropriate gradient is given to forward tips of a pair of engaging pins. CONSTITUTION:A pin operating mechanism 26 is attached to a body 3 of a hitch of a quick coupler. The pin operating mechanism 26 consists of a fluid pressure cyliner mechanism 28, a revolving sliding plate 30, an operating lever 32, a pair of approximately L-shaped operating revolving levers 34a, 34b, and a pair of engaging pins 36a, 36b. A rear surface of at least the end of each of the two engaging pins 36a and 36b has a gradient surface which tilts forward towrad an insertion direction and is substantially flat, and rear surfaces of a pair of pin supporting holes, through which the pins are inserted, are formed so that they closely engages their respective engaging pins 36a and 36b.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a quick coupler, and more particularly to a diamond-shaped quick coupler for detachably connecting a working device to an earthmoving vehicle equipped with a lift arm and a tilt link.

For example, a lift door, such as a loader, is equipped with a lift door and a tilt link, and various tasks can be performed depending on the working device K attached to it. For example, a loader equipped with a packet as a working device can be used for transporting and loading bulk products in port cargo handling work, yard maintenance work, etc.
Alternatively, it can perform backfilling work in piping work and soil leveling work, and a loader equipped with a fork as a working device can be used for carrying pallets of products in port cargo handling work, transporting products to warehouses, and long-distance work. It is possible to transport large objects, transport pipes in piping work, and carry out work on burying capes. Therefore, if various working devices such as packets, forks, and blades can be attached interchangeably as needed, one earthmoving vehicle can be used for multiple purposes.

Therefore, for example, JP-A-55-65639, JP-A-56
Various quick couplers are disclosed in the specification and drawings of No. 101402, which enable various working devices to be quickly and detachably connected to an earthmoving vehicle equipped with a lift door foot and a tilt link. It has been proposed and put into practical use.

The quick coupler disclosed in the specification and drawings of JP-A No. 56-101402 has a pitch attached to the tips of the lift arm and tilt link, and a hook fixed to the back of the working device. . In this quick coupler, the pair of upper retaining parts of the pitch are inserted downward and upward into the pair of upper receiving parts of the hook of the working device, and the upper retaining parts and the upper receiving part are engaged. Seshime,
After that, the pair of lower retaining parts of the pitch are engaged with the lower receiving part of the hook from the other side, and then the hydraulic cylinder mechanism attached to the pitch is operated to move the pair of retaining bottles, respectively. The connection is achieved by inserting each of the retaining pins into a bottle receiving hole formed in the hook.

However, each of the pair of locking pins disclosed in JP-A-56-101402 is a so-called round parallel bottle having a cylindrical shape, and when this round parallel bottle is used, The following problems occur.

In other words, when a round parallel bottle is used as the retaining pin, 1) there is no line contact between the retaining pin and the bottle receiving hole formed in the hook, and a large external force is applied to the working device. case,
There is a risk that the bottle receiving hole or retaining pin may be deformed or the retaining pin may be damaged. 2) The diameter of the retaining pin is somewhat smaller than the inner diameter of the bottle receiving hole (undersize). Because the retaining pin is easily inserted, a so-called play occurs between the retaining pin and the bottle receiving hole, and this can cause damage to the retainer due to vibrations when the vehicle is running or external forces applied to the working equipment. An impact force is generated between the dowel pin and the bottle receiving hole, and the transmission of this impact force accelerates the wear of the bottle, bearings, etc. 3) The pitch is lowered due to the play between the retaining pin and the bottle receiving hole. There is a problem with the cape that it swings using the retaining part as a fulcrum, and as a result KIIIA is created between the upper retaining part and the upper receiving part of the pitch, causing wear.

Therefore, in order to solve this problem, for example,
No. 5-65639 discloses the use of a so-called round taper pin engaging pin whose shape is a truncated conical shape instead of the above-mentioned parallel blade type pin, but when this round taper pin is used. However, the above-mentioned problems cannot be completely solved, and the problems described in section 1) still exist.

The present invention is based on the above-mentioned facts KIN! Its main purpose was to eliminate the above-mentioned drawbacks of the conventional technology,
It is possible to eliminate the so-called backlash that occurs between the retaining pin attached to the hitch and the bottle receiving hole formed in the hook, and to connect the two reliably, and also to improve the connection between the retaining pin and the bottle receiving hole. To provide a quick coupler for removably connecting a working device to an earthmoving vehicle, which can prevent deformation or damage of a retaining pin by making surface contact.

According to the present invention, the pitch is attached to the tip of a lift arm and a tilt link of an earthmoving vehicle, and the main body has an upper merging part and a lower retaining part, and is slidably attached to the main body at intervals in the lateral direction. 1. A pair of attached retaining pins and 1. for sliding the pair of retaining pins between an engaged position and a non-engaged position. A pitch provided with a bin operating mechanism disposed between the main body and a pair of engagement bins of the skeleton, and a hook fixed to the back of the working device to be connected to the earthmoving vehicle, the hook being fixed to the back of the working device to be connected to the earthmoving vehicle. An upper receiving part capable of receiving and engaging the joint part from below, a lower receiving part capable of receiving and engaging the lower securing part from behind, and the upper securing part and the upper nucleus. With the receiving parts engaged and the lower retaining part and the lower receiving part being engaged, the pair of retaining pins are slid from the disengaged position to the engaged position by the action of the bin operating mechanism. and a hook having a pair of bottle receiving holes into which at least the tips of each of the pair of engagement bottles are inserted, and a quick coupler for detachably connecting a working device to an earthmoving vehicle. The rear surface of at least four tips of each of the pair of retaining pins is a substantially flat inclined surface that slopes forward in the insertion direction of the pair of retaining pins; The rear surface of each receiving hole is also a substantially flat sloped surface that slopes forward in the insertion direction of the pair of retaining pins, and corresponds to one sloped surface of the pair of engagement pins; When at least the tip of each of the retaining pins is inserted into each of the pair of bottle receiving holes, the # inclined surface of each of the pair of engaging bottles and the # inclined surface of the pair of bottle receiving holes are brought into close contact with each other. Provided is a quick coupler which is engaged with a pair of retaining pins and has a gap between the other surface of each of the pair of wrinkled retaining pins and the other surface of the pair of bottle receiving holes. .

Reference will now be made in further detail to the accompanying drawings, which illustrate preferred embodiments of quick couplers constructed in accordance with the present invention.

A quick coupler according to the invention can be used to connect a pair of lift arms (not shown) of an earthmoving vehicle (not shown), such as a loader, for example.
hitch 2 (see Fig. 1) connected to the tip of the tilt link (see Fig. 1) and the tip of the tilt link (described later), and work equipment f14 such as a packet to be detachably connected to the earthmoving vehicle (see Figs. 6 and 7). It is equipped with 7 hooks 6 fixed to the back of the camera.

First, referring mainly to FIGS. 1 to 5, the hitch 2 will be described in detail.
and 8b, intermediate plays) 10a and 10b and inside plays) 12a and 12b. An upper tube member 14 and a lower tube member 16 are disposed between the outer plate 8a and the outer plate 8b, and extend substantially through the intermediate plates 10 and 10b and the inner plates 12m and 12b. There is. The upper tube member 14 and the lower tube member 16, the outer plates 8m and 8b, the intermediate plates 10m and 10b, and the inner plates 121 and 12b are firmly connected to each other by suitable means such as welding.

The upper pipe member 14 and the lower pipe member 16 are upper engaging portions 18a and 18b that engage with the seven hooks 6 of the working device 4, respectively.
and constitute the lower retaining portions 20& and 20b. That is,
Both of the upper pipe member 14 (intermediate plates 10 and 10b)
and each of the inner plates 12& and 12b), substantially semicircular guide members 221 and 22b protruding upward are disposed, respectively, and the guide members 22a and 22bO% * and inner plate 12 & and 1
2b constitute upper retaining portions 18m and 18bt of the upper tube member 14. Also, the lower pipe member 1
The lower engaging portions 2.1 and 20b of the lower tube member 16 are formed by the ends of the lower pipe member 16, that is, the portions between the outer plays 8m and 8b and the middle plays 10m and 10b. As shown in FIG. 1, each of the guide members 22a and 22b has guide surfaces 241 and 24b formed at their protruding ends, respectively, and are inclined laterally outward.

Body 3 of the illustrated quick turntable hit 2 according to the invention
A pin actuating mechanism 26 is attached to the holder. As shown in FIGS. 1 and 8, this pin operating mechanism 26 includes a hydraulic cylinder mechanism 28, a rotating sliding plate 30, and an operating lever 32
, a pair of abbreviated operating pivot levers 34& and 34b and a pair of engagement pins 361 and 36b1.

The hydraulic cylinder mechanism 28 has a through hole as shown in FIG. Fixed.

The output end of the fluid pressure cylinder mechanism 28 is connected to the fixing pin 4
4, it is rotatably connected to a rotating sliding plate 30 (in the illustrated example, it is composed of a pair of plate members).

The rotating sliding plate 30 has a substantially semicircular shape, a through hole shown in FIGS. 1 and 8, an inner plate 12 island, and 12
said inner plates 12a and 12;
b prevents movement in the left and right direction in FIG.
In FIGS. 1 and 8, it is mounted so as to be slidable in the vertical direction and pivotable around a fixing pin 44.

The operating lever 34Ku has the above-mentioned rotating sliding plate 3 approximately in the center thereof.
0 is fixed by means such as bolts and nuts.

Both ends of this operating lever 34 are connected to the inner plate 1, respectively.
It extends laterally outwardly through an opening 45 formed in each of 2a and 12b, respectively.

This opening 45 has the function of preventing the operating lever 32 from moving in a direction perpendicular to the plane of the paper in FIG.

Approximately midway between the upper pipe member 14 and the lower pipe member 16, and each of the intermediate plates 10a3 and 10b and the inner plate 12a
and 12b, a pair of lever mounting plates) 411 and 48b are provided, respectively.

Between each of the pair of lever mounting plates 48m and 48b, as shown in FIG. has been done. Each of the actuation turning levers 341 and 34b is fixed by fixing both ends of a bottle 50, which passes through a boss portion provided on each of the pair of lever plates 49m and 49b, respectively, to the pair of lever mounting plates 4B& and 48blC.
It is mounted so that it can rotate freely.

Each of the operating swing levers 34JL and 34b includes a
A bottle 52 is fixed to one end of the operating lever 32 through a hole 46 formed in the operating lever 32 (a pair of lever plates).
9m and 49b, respectively, are fixed at both ends of a bin 52), thus operating dredging levers 34 &
One end of b (D%) is connected to the v!4 end of the actuating lever 32, respectively.

Each of the intermediate plates 101 and 10b and the inner play) 1
2& and 12, there are further guide plates 5 fixed to the intermediate plates 10a and 10b1, the inner plates 12& and 12b, and the lower tube member 16, respectively.
61 and! 56b is provided. Each of the upper ends of the guide plates 561 and 56b is provided with a guide plate 5.
8 & and 58b, 60 & and 60b and 621 and 6
2b, the guide member 571 has a substantially U-shaped cross section.
and 57b are determined as husband hIjl. Each of the guide plates 561 and 56b and each of the guide members 57a and 57b has a guide W&65 having a rectangular cross-sectional shape.
& and 65b, respectively. In the guide paths 61 and 65b, the third engagement pins 361 and 36b are provided.
It is slidably mounted vertically to the plane of the paper in the figure, and horizontally in FIGS. 1 and 5. Each of the engaging bins 36a and 36b is connected to a connecting bin 64, respectively.
One end of the operating swing lever 34& and 34b (the end opposite to the end to which the operating lever 32 is connected)
It is rotatably connected to. Each of the connecting bins 64 is connected to the engaging bin 36&and 36b1 and the guide plate 5.
Elongated holes 66 formed in each of guide plates 6a and 56b, openings formed in each of guide plates 60m and 60b, that is, slit holes 6B, and actuating pivot levers 34 & 34b.
The pair of lever plates 49& and 49bK are fixed through holes 54t formed in each of the pair of lever plates 49& and 49b, respectively. The engaging pins 36aEI and 36b each have a substantially rectangular cross-sectional shape as shown in FIG. Each has
Substantially flat sloped surfaces 701 and 7 slope forward toward the insertion direction of the pair of engagement bins 36a and 36b, respectively.
0b is formed.

Thus, in the above-described continuous bottle operating mechanism 26, when the fluid pressure cylinder mechanism 28 is completely retracted,
The positions indicated by the two-dot chain line 36B in FIG.
When the hydraulic cylinder mechanism 2B is positioned at a position protruding by a predetermined amount from the hole 72, which is formed by 1 and 8bK and has a substantially rectangular cross-sectional shape, and when the fluid pressure cylinder mechanism 2B is extended, two points 41@36m are shown in FIG. The position shown in , that is, the pair of engagement bins 3
Each tip of 61 and 36b is intermediate play) 10m
A non-coherent position tK is positioned within a hole 74 which is formed in and Sob and whose cross-sectional shape is substantially rectangular.

At this time, a pair of O-engaging pins 36 and 36b protrude from the holes formed in the rear end plates 121L and 12b, respectively, and have a substantially rectangular cross-sectional shape, and connect to the inner plate 1111, respectively. 121 and 12'b.

On the outside of each of the outer plates 8a and sbo+ and inside each of the intermediate plates 10a and 10b, in order to supplementally support the holding bins 36m and 36b, respectively,
An auxiliary plate 76 is fixed along one side of each of the rectangular holes 72 and 74.

Next, the seven hooks 6 fixed to the back surface of the working device 4 will be explained in detail with reference mainly to FIGS. 6 and 7.

In the embodiment shown, a hook 6 fixed on the rear side of a suitable working device 4, such as a packet, to be connected to an earthmoving vehicle, is located at a predetermined distance in the direction of lateral force on the top of the working device [4]. A pair of upper hook members 78m fixed to
and 78b, and a pair of lower hook members 80a and 80b fixed to the lower part of the working device 4 at a predetermined interval in the lateral direction.

The pair of upper hook members 78m and 78b are respectively fixed to the back surface of the working device 4 and have a pair of substantially inverted U-shaped notches 82m and 82b, and this pair of upper hook members 821 and 82b. Approximately inverted U-shaped upper receiving plates 84m and 84 fixed between each approximately inverted U-shaped part
b. The upper receiving plates 84& and 84b are the upper receiving portions 8 of the upper hook members 78m and 78b, respectively.
6a and 86b, and as will be explained in detail later, each of the approximately inverted U-shaped upper receiving parts 86m and 86b engages with the upper engaging part 18a and the front and rear parts of the hitch 2. can be matched.

On the other hand, the pair of lower hook members 801 and 80b are respectively fixed to the back surface of the work equipment f4 and have a substantially semicircular notch at the bottom thereof, and a plate 88 and 88b. It is provided with substantially semi-cylindrical lower receiving plates 90& and 90b fixed to. These lower receiving plates 90& and 90b constitute lower receiving parts 92a and 92b of the lower hook members 80m and 80b, respectively, and as will be explained in detail later, these substantially semicylindrical lower receiving parts 92& and 92b each corresponds to the lower engaging portion 20 of the hitch 2.
The upper part of each of the 凰 and 20b is inserted from the rear,
It can engage the front part and the bottom part.

A pair of pin engagement plates 941EI and 94b are further fixed to each of the pair of plates 88a and 88bO at a substantially intermediate position thereof. Each of the pair of pin engagement plays 94a and 94b has a
Holes 96m and 96b whose cross-sectional shape is substantially rectangular are formed, and the rear surface of the holes 961 and 96b of the pair of bottle holding plates 94& and 94b (lower side in FIG. 5, left side in FIG. 7). @) A pair of engagement pins 36 corresponding to the holes shown in FIG. 5 and the inclined surfaces 70m and 70b formed on the engagement pins 36m and 36b.
1 and 36b (2) Bin engaging members 100a and 100b having substantially flat sloped surfaces 981 and 98b that slope forward in the insertion direction are fixed. Then, the pair of bottle engaging portions 1/-) 94a3 and 94bC) holes 9
6m and 96b and bottle engaging members 1001 and 100
98b and 98b constitute the bottle receiving holes 102a and 102b.This bottle engaging member 100
aEI and 100b, that is, pin receiving holes 102a and 102b
As will be explained later, each of the sloped surfaces 98& and 98b of the hitch 2 is engaged with the pair of upper engaging portions 861 and 86b of the hook 6, respectively, and Each of the pair of lower engaging parts 20 and 20b of the hitch 2 is connected to the pair of lower receiving parts 9 of the hook 6.
A pair of engaging pins 361 contract the fluid pressure cylinder mechanism 28 while being engaged with each of the pins 2a and 92b.
and 36b are slid, the pair of engagement pins 36a
and 36b, the inclined surfaces 70m and 70b are tightly engaged with each other.

In the quick coupler in the illustrated example, the ends of the pair of lift arms 104 (only one of which is shown in FIG. 7) of the earthmoving vehicle shown in FIG. 8b bottom and middle play) 10a
and the lower part of the hitch 2 by a means such as a pin, and the tip of the tilt link 106 is rotatably connected to a substantially intermediate position between the inner plates 12a and 12b of the hitch 2 by means such as a pin. connected to.

Next, the operation of interconnecting the hitch 2 and the hook 6 of the above-mentioned passageway, thus the operation of connecting the working device 4 to the earth-moving vehicle, and the operation of uncoupling the hitch 2 and the hook 6, therefore, the operation of disconnecting the working device from the earth-moving vehicle. The detachment operation in step 4 will be explained.

First, to explain the connection operation between the first hit 2 and the seventh hook 6, in order to connect the hit 2 and the hook 6, first, the output end of the fluid pressure cylinder mechanism 28 is extended and the engagement bins 361 and 36b are connected. Each @;g diagram shows two-point chain 113
6A, the pair of upper engaging portions 18a and 18b of the hitch 2 are moved forward by the earthmoving vehicle (not shown) itself and by operating the toe arm 104 and tilt link 106. Insert each of them upward into a pair of upper receiving parts 861 and 86b of the hook 6 fixed to the back surface of the working device 4 located on a support base such as the ground, and then hide them. Therefore, the pair of upper engaging parts 18a and 18b of the hitch 2 and the pair of upper receiving parts 86
The gourd and 86b are engaged with each other. At this time, if the hook 6 is located slightly to the right of the hitch 2 from the predetermined connecting position in FIG. 22&
The inclined surface 24& of the upper receiving plate 84a is brought into contact with the outer end of the upper receiving plate 841 acting as the upper receiving portion 86m, and the upper receiving plate 84a1 and therefore the working device 4 are moved along this inclined surface 241 to the left in FIG. Furthermore, if the hook 4 is located slightly to the left of the predetermined connecting position with respect to the hitch 2 in FIG. is the upper receiving part 86
abuts against the outer end of the upper receiving plate 86b acting as b,
This upper receiving plate 84b, and therefore the working device 4, is connected to this inclined surface 2.
When the upper engaging parts 18a and 18b of the hitch 2 are respectively engaged with the upper receiving parts 86m and 86 of the hitch 6, the upper receiving plates 84a and 84b are moved to the right side in FIG. The foreign capital end of each of
That is, the lateral outer ends of the upper receiving parts 86a and 86b are adjacent to or in contact with the bases of the guide members 221 and 22b, respectively. Therefore, even if the hook 6 is located slightly left or right from the predetermined connection position with respect to the hitch 2 at the time of connection, the action of the pair of guide members 22 & and 22b will ensure that the upper retaining portion 18m and 18b
and the upper receiving parts 86m and 86b.

Upper engaging part 18& and 18b of hitch 2 and upper receiving part 86
Following the engagement of the lower engaging portions 20 & 86b of the hitch 2, the pair of lower engaging portions 20& and 20b of the hitch 2 are moved forward by the earthmoving vehicle itself and by operation of the lift arm 104 and tilt link 106.
A pair of lower receiving parts 92a and 92b of the hook 6 from the rear
K engage. Or instead of this, lift arm 1
04 is slightly raised and the hook 6 and the working device 4 fixed thereto are connected to the upper engaging portions 18 and 18 of the hitch 2.
The tilt link 106 is made to hang from b and the tilt link 106 is slightly tilted back.

As a result, the working device 4 and the hook 6 fixed thereto are rotated around the pair of upper engaging portions 18& and 18b of the hitch 2, and thereby each of the pair of lower engaging portions 201 and 20b of the hitch 2 is rotated. are engaged with each of the pair of lower receiving parts 921 and 92b of the hook 6 from the rear.

Thus, as shown in FIG. The working device 4 is prevented from moving in the downward, forward, and backward directions, and the lower receiving parts 92m and 92b of the hook 6 are connected to the upper and front parts of the lower engaging parts 201 and 20b of the hitch 2, respectively. It also engages with the lower surface portion to prevent movement of the working device 4 in the downward direction, backward direction, and downward direction relative to the pitch 2.

By carrying out the above-described threading operation, each of the pair of upper engaging parts 18& and 18b of the hitch 2 is engaged with each of the pair of upper receiving parts 86m and 86b of the hitch 6. When the lower engaging portions 2 (l and 20b) are engaged with the pair of lower receiving portions 92m and 92b of each kt''7 hook 6, the pair of engaging bins 36 & and 36b attached to the pitch 2 are engaged. The respective bottle receiving holes 102& and 102bO are aligned with each other in the horizontal direction.

After that, the hydraulic cylinder mechanism 2 of the bin actuating mechanism 26
8 to retract its output end, the rotating sliding plate 30 and the operating lever 32 move from the positions indicated by two-dot chain lines 30A and 32A in FIG. 8 to the position indicated by a solid line in FIG. and 12b in the downward direction between them. When the actuation lever 32 is slid, the actuation pivot lever 34 connected to one end thereof
Each of a and 34b is pivoted about the bin 50, and is pivoted from the position indicated by the chain double-dashed line 34A to the position indicated by the solid line in FIG. Then, when each of the actuation turning levers 34m and 34b is turned, each of the holding bins 36m and 36b connected to the actuation turning levers 341 and 34b, respectively, moves along the guides 65a and 65b, respectively. The position indicated by the two-dot chain line 36 at 8@, that is, the pair of holding bins 36 & and 36
A non-engaged position where the tips of each of b are located in the holes 74 formed in the intermediate plate 10 and 10b, respectively (in this specific example, when the engagement pins 361 and 36b are in the non-engaged position, The OS ends of the joint bins 36& and 36b are respectively slid laterally outward from the inner play (projecting at the junctions of the inner plates 12m and 12b, respectively), and their respective tip ends are connected to a pair of lower hook members 80a'. Et bi80b
The engagement pin 36 is inserted into the bottle receiving holes 102a and 102b, respectively, and is located at the position shown by the solid line in FIG.
1 and 36bK formed slope m70 & and 70b
are tightly engaged with inclined surfaces 981 and 98b formed on the rear surfaces of the bottle receiving holes 102a and 102bo, respectively (also shown in FIGS. 5 and 7) K
be positioned. The locked state of the locking bins 36m and 36b can be seen through slit holes 68 formed in the driver's seat guide plates 60a and 60b, respectively, of the earthmoving vehicle, as will be explained in detail later. When each of the pair of locking pins 361L and 36b is in the engaged position, K is
As shown in FIG. 7, the pair of engagement pins y35a and 36bC1 have a surface other than the surface where the inclined surfaces 70JL and 70b are formed, and the lower hook members 80a and 80b.
Inclined surfaces 981 and 9 of bottle receiving holes 1021 and 102b
8t) does not fit into any surface other than the surface on which it is formed, and a gap exists between these two surfaces.

As a result, the hitch 2 and the hitch 6 are connected, and thus the working device 4 is connected to the earthmoving vehicle.

When hitch 2 and hook 6 are connected to each other as described above, separation in the vertical direction (including play, etc. that occurs between hitch 2 and hitch 6) is caused by the pair of upper receiving parts of hook 6. 86
a and 86b each represent a pair of upper engaging portions 18 of the hitch 2.
1 and 18b, and each of the pair of lower receiving parts 92& and 92b of the hitch 6 engages with the upper surface of each of the pair of lower engaging parts 20a and 20b of the hitch 2. The pair of lower receiving parts 92m and 92b of the hook 6 are each engaged with the lower surface of each of the pair of lower engaging parts 20a and 20b of the hitch 2. This is reliably prevented by preventing the hitch 2 from moving downward relative to the hook 6. On the other hand, detachment in the front-back direction (including looseness that occurs at the connection between the hitch 2 and the hook 6) is caused by the pair of upper receiving parts 861 and 86b of the hook 6 each being attached to the pair of upper retaining parts 1811jt of the hitch 2. and 18b to prevent the upper end of the hitch 2 from moving in the front-rear direction relative to the upper end of the hook 6.
21 and 92b each represent a pair of lower engaging portions 2 of the hitch 2.
01 and 20b, and are formed in the pair of pin receiving holes 102a and 102b of the hook 6, respectively, are formed in the pair of engagement pins 36a and 36b of the hitch 2. Slope 70m and 7
0b to prevent the lower end of the hitch 2 from moving in the front-rear direction relative to the lower end of the hitch 6.
Therefore, it is reliably prevented.

Next, to explain the operation for disconnecting the hitch 2 and the hook 6, first, the lift arm]04 and the tilt link]
06, the working device 4 is placed on a support base such as the ground. Next, the hydraulic cylinder mechanism 28 is operated to extend its output end. As a result, the swing sliding plate 30, the operating lever 32, and the operating swing levers 34 & 34b are moved from the positions indicated by solid lines in Fig. 8 to the positions indicated by double-dot chains 1130m, 32m, and 34A in Fig. WJ8. 8, each of the pair of engagement pins 361 and 36b moves the guide path 6 from the position shown by a solid line in FIG.
5m and 65b, and thus the pair of retaining bottles 36m and 36b of the hitch 2 are separated from the pair of bottle receivers 102a and 102b of the hook 6.

Next, by moving the earthmoving vehicle 1 backward and moving the lift arm 104 away, or by further tilting the tilt link 106 forward, the pair of lower engaging portions 20a and 20b of the hitch 2 each have a metal 7 piece 6. It is separated from each of the pair of lower receiving parts 92& and 92b. Furthermore, by operating the stop arm 104 and the tilt link 106, the pair of upper engaging portions 18m and 18 of the hitch 2 are
a pair of upper receiving portions 86m and 86b of the hook 6, respectively.
to separate from each of them. In this way, the hitch 2 and the hook 6 are disconnected, and the working device 104 is removed from the earthmoving vehicle.

In the illustrated example, the above-mentioned through hole, a pair of engaging pins 36
Substantially flat sloped surfaces 70& and 7°b which slope forward in the insertion direction of the pair of engagement pins 36& and 36b are provided on the rear surface of each of the pin receiving holes 102m and 102b. Inclined surfaces 98a and 98b corresponding to the inclined surfaces 70a and 70bK of the pair of engagement bins 36& and 36b are provided on the rear surfaces of each of the engagement bins 36& and 36b. The inclined surfaces 70& and 70b of b and the inclined surfaces 98m and 98 of the pin receiving holes 102a and 102b.
A pair of engaging pins 36a are tightly engaged with each of the engaging pins 36a.
and 36b are positioned in the central engagement position. With such a structure, there may be some molding errors in the retaining bins 361 and 36b1 bottle receiving holes 1021 and 102b, etc., and there may be some molding errors in the retaining bins 36m and 36b1 bottle receiving holes 102a and 102b etc. due to use. Even if wear and tear occurs, the pair of retaining bottles 3513 and 36 of hitch 2
A pair of bottle receiving holes 102 m and 102 b with b = 7 x 6
The pair of retaining bins 36 are inserted somewhat more or less tightly (somewhat more in the case of wear and tear)
Surface contact between each of the sloped surfaces 70 & 70b of the bins 36B and 36b and each of the slopes 98m and 98b of the pair of bottle receiving holes 102a and 102b is maintained, thus preventing molding errors and abrasion of the holding bottles 36B and 36b, etc. etc., and the occurrence of backlash is avoided.

Further, in the illustrated example, the rotating sliding plate to which the output end of the fluid pressure cylinder mechanism 28 is fixed is connected to the inner plate 12.
a and 12brlJ'JK are slidably and rotatably mounted, but this is a pair of O-engaging bins 36& and 36b.
each of the inclined surfaces 701 and 70b and a pair of bottle receiving holes 10.
Even if there are so-called variations in engagement between the inclined surfaces 98 & 98b of 2a and 102b, which occur during manufacturing, long-term use, etc., the rotation sliding plate 30 and, therefore, the operating lever 32. The pivoting movement allows each of the actuating pivot levers 36a and 36b to pivot independently of the other about the bin 50, thus allowing each of the engagement bins 36& and 36b to pivot independently of the other. It becomes possible to slide within the guide paths 65& and 65b. Therefore, it is possible to automatically compensate for variations in engagement that occur during manufacturing, long-term use, etc. by the pivoting movement of the pivoting sliding plate 30 and, therefore, the operating lever 32, thereby ensuring reliable engagement of the engagement pin 36a. and slopes 70m and 70b of 36b and slopes 98m of bottle receiving holes 1021 and 102b.
and 98b can be maintained.

In addition, in the specific example illustrated, FIGS. 1, 3, and 5.
As can be easily understood from the figure, the guide plates 6a and 60b are each provided with a slit hole 68 that can be seen by the operator from the driver's seat of the earthmoving vehicle. Although the locking bins 36m and 36b are configured so that the locked state can be visually observed, in order to be able to more easily and reliably judge this engaged state, FIGS. It can also be configured as shown in Figure 9-C.

Figures 9-A to 9-C (only the locking pin 36 & side of the pair of locking pins 36a and 36b are shown)
, a part 112aKFi of the surface of the guide plate 6010 having a slit hole 68 that can be seen from the driver's seat (not shown) of the earthmoving vehicle, and another part Kfl! A paint of another color (for example, red or green paint) is applied, which is different from the color of the paint being applied (for example, yellow). In the normal state, the slope 701 of the holding bottle 36m and the bottle receiving hole 10 are
When the inclined surface 98a of 2a is tightly engaged, the 9th-B
As shown in the figure, the rear end of this engaging pin 36a is the guide plate 60.
It is configured to be located at the boundary between the paint applied to a part 1121 of 1 and the paint applied to other parts. For this purpose, one operator
8, and connect the engagement bottle 36 of the hitch 2 to the inclined surface 7 of the
0m and the inclined surface 98m of the bottle receiving hole 102a of the hook 6, the rear end of the locking bottle 36C)
As shown in FIG. Look at the rear end of the engaging pin 36a through the slit hole 68 and check that the engaging pin 36m and the bottle receiving hole 1o21 are engaged, and therefore the hitch 2 and the hook 6 are completely connected. can be easily judged.

FIG. 9-A shows that the engaged state of the engagement pin 361 is incomplete, which is due to the lower retaining portions 20& and 20b of the hitch 2 and the lower receiving portions 92m and 7 of the hitch 6. 9
2b or between the engaging portion of the bottle 36 and the bottle receiving hole 10.
2a, and a part of the surface 112a of the rear end of the holding bin 36m, the passageway shown in Figure 9-A, and the guide plate 60. A portion (for example, a red or green portion) is located at K and informs the operator that the connection between the hitch 2 and the hook 6 is incomplete.

9th. -0 diagram shows holding bottle 36m and pin receiving hole 102mK
This shows a completely connected state in the event of wear and tear, etc. In this case, the engaging pin 36m is inserted into the pin receiving hole 102a a little more than in the normal case, and the inclined surface of the retaining pin 36a is inserted. 70a and the inclined surface 98& of the pin receiver UO2a engage, the rear end of the retaining pin 36a crosses the paint applied to the part 112a of the guide plate 60&, as shown in Figures g-c. and located in other parts (for example, the yellow part),
To inform an operator that the hitch 2 and hook 6 are completely connected.

Thus, the operator can view the guide boards 60m and 60b from the driver's seat.
By visually observing the rear ends of the engagement bins 36 & and 36b through the slit holes 68 formed in the K husband, the rear ends of the engagement bins 361 and 36b and the guide plates 60m and 60 can be seen.
The state of engagement between the engaging bottle 36 islands and 36b and the bottle receiving holes 102a and 102b, and therefore the hit 2 and The state of connection with the seven hooks 6 can be easily determined.

Although one specific example of the quick coupler constructed according to the present invention has been described above in detail, the present invention is not limited to this specific example, and various modifications and modifications may be made without departing from the scope of the present invention. It is clear that this is possible.

For example, in the illustrated example, the sliding movement of the rotating sliding plate and the operating lever is performed by a fluid pressure cylinder mechanism, or a lever mechanism is used instead of the fluid pressure cylinder mechanism,
The lever mechanism may be manually operated to slide the pivot sliding plate and the operating lever.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the pitch of a specific example of a quick coupler constructed according to the present invention, viewed from the driver's seat side. FIG. 2 is a right side view of the pinch shown in FIG. 1; FIG. 3 is a cross-sectional view of the hitch shown in FIG. 1 taken along the line . FIG. 4 is a sectional view taken along the line ■-■ of the hitch shown in FIG. FIG. 5 is a sectional view illustrating the locked state of the locking bottle and the bottle receiving hole. FIG. 6 is a front view illustrating a hook of one embodiment of a quick coupler constructed in accordance with the present invention. FIG. 7 is a side view showing a state in which the hitch shown in FIG. 1 and the hook shown in FIG. 6 are connected; FIG. 8 is an operation explanatory diagram for explaining the pitch bin operating mechanism shown in FIG. 1. 9-A to 9-0 are explanatory diagrams illustrating the positional relationship between the pitch guide plate and the retaining bin illustrated in FIG. 1. FIG. 2...Pitch 4-Working device 6...Hook 18 Turtle and 18b...Upper retaining part 20m and 20b...Lower retaining part 26--Bin operating mechanism 36m and 36b--Retaining bin 6B- - Sekiguchi (slit hole) 70 and 70b - Inclined surfaces 861 and 86b - Upper receiving parts 921 and 92b - Lower receiving parts 98 and 98b - Inclined surface 104 - Rear door arm 106 - Tilt link

Claims (1)

[Claims] 1. A pitch that is attached to the tip of a lift arm and a tilt link of an earthmoving vehicle, which has an upper retaining part and a lower retaining part, and a main body that is slidable at intervals in the lateral direction. 1 for sliding a pair of engagement bins attached to the main body and a pair of engagement bins between an engagement position and a non-engagement position;
A pitch provided with a bin operating mechanism disposed between the main body and a pair of engaging bins, and a hook fixed to the back of the working device to be connected to the earthmoving vehicle, the upper retaining an upper receiving part that can receive and engage the lower retaining part from below, a lower receiving part that meets the lower retaining part by receiving the lower retaining part from behind and engaging with it, and the upper retaining part; With the upper receiving part engaged and the lower engaging part and the lower receiving part being engaged, the pair of locking bins are slid from the non-locking position to the locking position by the action of the bin operating mechanism. An O-quick for removably connecting a working device to an earthmoving vehicle, comprising: a hook having a pair of pin receiving holes into which at least the tips of each of the pair of engagement bins are inserted; In the coupler; at least the rear surface of the tip of each of the pair of retaining bottles,
The pair of locking pins are substantially flat sloped surfaces that slope forward in the insertion direction, and the rear surfaces of the valleys of the pair of pin receiving holes are also formed on the sloped surfaces of the pair of locking pins. a corresponding substantially flat inclined surface that slopes forward in the insertion direction of the pair of retaining bottles, and at least a tip end of each of the pair of retaining bottles is formed in each of the pair of bottle receiving holes O; When inserted into the pair of retaining bottles O, the sloped surface of each hO of the pair of retaining bottles and the slope rM of the pair of bottle receiving holes are tightly engaged, and the wrinkles form the other surfaces of each of the pair of retaining bottles. A quick coupler characterized in that a gap exists between the pair of bottle holes and the other surface. 2. The upper retaining part and the lower retaining part of the pitch are arranged in pairs at intervals in the lateral direction. The quick coupler according to claim 1, wherein a pair of quick couplers are arranged at an interval. 1. The pitch includes a pair of guide members that are disposed adjacent to the laterally outer sides of each of the upper retaining parts and project upwardly, and at least the projecting ends are inclined laterally outwardly. However, when each of the upper retaining parts is engaged with each of the upper receiving parts, 1! of the pair of guide members. 3. The quick coupler according to claim 2, wherein the base portions of the upper receiver portions aII contact with the outer lateral ends of each of the upper receiving portions. 4. The quick fixing device according to any one of claims 1 to 3, wherein at least four tip portions of each of the pair of connecting bottles and each of the pin receiving holes of the pair of waists have a rectangular cross-sectional shape. coupler. 5. The skeleton cylinder operating mechanism has one end fixed to the main body of the pitch and a psychohydraulic cylinder mechanism, and is slidably arranged relative to the body of the skeleton hit, and has an output end of the hydraulic cylinder mechanism in the center thereof. and a pair of actuating levers that are rotatably mounted on the main body of the pitch, each having one end connected to the shark actuating lever and the other end connected to the pair of engaging pins, respectively. and an actuation pivot lever, and when the hydraulic cylinder mechanism is actuated, the actuation lever slides and the pair of actuation pivot levers are respectively pivoted, and the pair of locking bins are rotated, respectively. Claims 1 to 4 are slidable to a locking position where the sloped surface of the pin receiving hole and the sloped surface of the pair of pin receiving holes are tightly engaged.
The quick coupler described in any of the paragraphs. 6. A substantially semicircular rotating sliding plate is attached to the output end of the fluid pressure cylinder mechanism so as to be slidable and pivotable between a pair of inner plates provided on the main body of the pitch; 6. The quick coupler according to claim 5, wherein the operating lever is fixed to the sliding plate. 7. The main body of the pitch is provided with a pair of guide plates for guiding each of the pair of retaining bins, and at least a portion of each of the pair of guide plates is provided with a guide plate for the operator to guide from the driver's seat. The quick coupler according to any one of claims 1 to 6, wherein an opening is formed through which the position of each of the pair of locking bins can be visually observed. 8. At least a portion of the surface of the guide plate with the opening is coated with a paint of a different color from the paint applied to the other parts, and the pair is maintained. When each of the bottles is in the engagement position, the rear end of each of the pair of locking bottles is located at a boundary between different paint colors or a portion of paint applied to the other portion. A quick coupler according to claim 7.