KR102475272B1 - Quick joint of front loader and Front loader containing the same - Google Patents

Abstract

Disclosed are a front loader quick joint for rapid attachment/detachment of a front loader to a tractor and a front loader including the same. A front loader quick joint according to an aspect of the present invention includes a hook-shaped binding member pivotally connected to a first pivot point of a boom post of the front loader through a first pivot axis, blood on a boom post support attached to a tractor A spring member that imparts elastic force in the direction of releasing the binding member from the binding shaft, a part of which is provided to come into contact with the binding member, and rotates with a fixing pin provided on the side of the boom post as a rotation center to rotate the binding member at the binding position. It is formed on the boom post and the lock unit equipped with a lock pin that restricts the movement, and includes an arc-shaped guide slot that divides the movement path of the lock pin when the lock unit rotates. When the formed and rotating lock unit reaches the binding position, the lock pin is inserted into the fixing groove and configured to constrain the behavior of the binding member.

Description

Front loader quick joint and front loader including the same {Quick joint of front loader and Front loader containing the same}

The present invention relates to a front loader quick joint, and more particularly, to a front loader quick joint for rapid attachment/detachment of a front loader to a tractor and a front loader including the same.

The tractor has an advantageous structure and characteristics in performing various tasks depending on the purpose by mounting a working machine on the rear or front. For example, loader, rake, rotavator, plow, harrow, etc. are attached to the front or rear to transport soil, plowing, soil excavation, pumping, threshing It can perform various agricultural tasks such as

Among the various types of work machines mounted on tractors, there is a front loader used for loading soil or aggregate onto a transport machine or moving them to another place. The front loader is composed of a boom and an arm, a boom cylinder and a bucket cylinder, and a bucket installed at the tip of the arm, based on the boom post attached to the boom post support on the body side.

Such a conventional tractor front loader adjusts the height of the boom relative to the boom post through the boom cylinder and variously adjusts the angle of the bucket with respect to the arm with the bucket cylinder, thereby lifting or pushing the soil on the floor. It can perform various tasks such as moving to another place or pouring out the soil that has been dug up.

The front loader can be detachably connected to the boom post support. Therefore, if necessary, it can be attached to the front of the tractor and used, and after use, it can be removed from the aircraft and stored separately. Conventionally, for attaching and detaching the front loader, a method in which the boom post 200 is mounted on the boom post support 100 as shown in FIG. 1 and then the pin 300 is inserted and connected at a designated position is mainly adopted.

This method of connecting using the pin 300 has the advantage of being advantageous in terms of manufacturing and cost due to its simple structure. However, since the pins 300 must be inserted and removed one by one when attaching or removing the front loader from the tractor, it is very cumbersome to attach the front loader and it takes a lot of time for the operator to replace it alone.

In addition, due to its nature, the loader operation is often exposed to various oxidizing substances such as compost or soil or foreign substances such as dust. Therefore, the pin 300 is easily corroded or adhered, and as a result, there is a problem in that manpower consumption increases in the separation of the pin to remove the front loader, and in some cases, separate equipment such as a hammer or hydraulic jack must be mobilized Sometimes it happens.

Japanese Patent Laid-Open No. 2011-017204 (published on Jan. 27, 2011)

The technical problem to be solved by the present invention is that a front loader can be quickly mounted or removed from a tractor, thereby reducing working time, increasing work convenience, improving workability and improving work efficiency. It is intended to provide a front loader quick joint and a front loader including the same.

According to one aspect of the present invention as a means of solving the problem,

As for the quick attachment and detachment of the front loader to the tractor,

A hook-shaped binding member pivotally connected to a first pivot point of a boom post constituting the front loader through a first pivot shaft;

a spring member for imparting an elastic force in a direction of releasing the binding member from an axis to be coupled on a boom post support attached to the tractor;

A lock unit provided with a lock pin, a part of which is provided to come into contact with the binding member, rotates around a fixing pin provided on a side surface of the boom post as a rotation center, and restricts the behavior of the binding member in a binding position; and

An arc-shaped guide slot formed on the boom post and dividing a movement path of the lock pin when the lock unit rotates;

A fixing groove is formed in the guide slot on the same line as the binding position,

When the rotating lock unit reaches the binding position, the lock pin is inserted into the fixing groove and restrains the behavior of the binding member.

In the present invention, a portion of the lower surface of the lock pin may be configured to come into contact with the linear force transmission surface of the upper surface of the coupling member.

In addition, the spring member applied to the present invention may be a tension spring provided to connect the first spring connector of the binding member and the second spring connector on the boom post located below the first spring connector.

In addition, the lock unit applied to the present invention includes a lock lever having a long hole into which the fixing pin is inserted, and a lock pin connected at right angles to the front end of the lock lever so that a part of the outer surface is in contact with the force transmission surface of the binding member, It may be composed of a lock spring connecting the fixing pin and the lock pin and imparting an elastic force to the lock pin toward the fixing pin, wherein the lock pin rotates according to the rotation of the lock lever centered on the fixing pin. It may be configured to constrain or release the restraint of the behavior of the binding member while moving along the movement path defined by the guide slot.

Preferably, the lock pin can be automatically inserted into the fixing groove of the guide slot at the binding position by the elastic force of the lock spring.

In the present invention, the binding position may be a rotational position of the lock unit at the time when the shaft to be bound is inserted into the predetermined binding position of the binding member.

In the present invention, the guide slot has a fixing pin as a center of curvature, and a radius of curvature smaller than the distance D1 from the first pivot axis to the outermost edge of the binding member. It can be formed in an arc shape with

According to another aspect of the present invention as a means of solving the problem,

A front loader including a; attached to a tractor and detachably attached to a boom post support having a fastening surface and a stopper 104, and having a fastening plate corresponding to the fastening surface and a boom post having a front loader quick joint of claim 1 to provide.

According to an embodiment of the present invention, as a fastening method using a hook-shaped binding member, a front loader can be easily and quickly attached to a tractor without applying a large force compared to the conventional pin connection method, or, conversely, the front loader from the tractor can be removed.

Therefore, the time required for attaching and detaching the front loader can be significantly reduced, and work delay can be reduced by the reduced time, so that work efficiency can be greatly improved. In addition, advantageous effects can be exerted not only to increase work convenience, but also to secure product competitiveness.

1 is a schematic diagram of main parts of a conventional front loader;
2 is a perspective view of a tractor to which a front loader is attached.
3 is a side view of the tractor to which the front loader of FIG. 2 is attached;
Figure 4 is a side view showing a state before binding the boom post of the front loader to the boom post support on the tractor side.
5 is an enlarged detailed view of part 'A' of FIG. 3;
6 is a side view of the boom post of FIG. 5;
Fig. 7 is a perspective view of a lock unit;
8 is a conceptual diagram of a guide slot;
9 is a view showing an operating state of a quick joint when a front loader is attached to a front part of a tractor.
10 is an enlarged view of a main part showing a binding process of a quick joint with respect to an axis to be bound at a second binding point;

Hereinafter, preferred embodiments of the present invention will be described in detail.

Terms used in the specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "having" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features or It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Also, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

In addition, terms such as "...unit", "...unit", and "...module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. can

In the description with reference to the accompanying drawings, the same reference numerals will be given to the same components, and overlapping descriptions thereof will be omitted. In addition, in the description of the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, a tractor will be taken as an example as a work vehicle to which a front loader related to the present invention is attached. Of course, the tractor is one preferred example for explaining the present invention, and the application target of the front loader is not particularly limited to the tractor, and all types of self-propelled vehicles having a structure in which the front loader can be detachably attached to the front can be mounted. have.

First, with reference to FIGS. 2 and 3 , the overall configuration of a front loader including a front loader quick joint according to an embodiment of the present invention will be schematically reviewed.

2 is a perspective view of a tractor to which a front loader is attached, and FIG. 3 is a side view of the tractor to which a front loader of FIG. 2 is attached. And Figure 4 is a side view showing a state before binding the boom post of the front loader to the boom post support on the tractor side.

2 to 4, the front loader 2 is connected to the body of the tractor 1 and is disposed forward. The front loader (2) raises or pushes the soil to another place by adjusting the height of the boom through the boom cylinder (23) and adjusting the angle of the bucket (27) with respect to the arm (26) through the bucket cylinder (28). It can perform various tasks such as moving or pouring out the soil that has been dug up.

The front loader (2) includes a boom post (20) for connection with the tractor (1) side. In addition, boom post supports 10 coupled to the boom post 20 and connecting the front loader 2 to the vehicle body are provided on both sides of the vehicle body of the tractor 1. The boom post support 10 includes a coupling groove 12 and a coupling shaft 14, and a coupling pin 22 and a quick joint 3 are provided in the boom post 20 corresponding to each.

Coupling of the coupling pin 22 to the coupling groove 12 at the first coupling point U1, and coupling of the quick joint 3 to the coupling shaft 14 at the second coupling point U2 As a result, the boom post 20 and the boom post support 10 may be connected to each other to form a strong bond.

The main binding structure (quick joint structure) will be described in more detail later with reference to FIGS. 4 and 5 .

The boom post 20 is formed with two pivot points P1 and P2. One end of the boom cylinder 23 is pivotally connected to a relatively lower pivot point (P1, hereinafter referred to as a 'first pivot point') of the two, and a relatively upper pivot point (P2, hereinafter, One end of the boom 24 is pivotably connected to the 'second pivot point').

An arm 26 is connected to the other end of the boom 24 through a cam plate 25 . A bucket 27 is pivotably connected to the front end of the arm 26 . At this time, the other end of the boom cylinder 23 is pivotally connected to the cam plate 25, and to a bracket (symbol omitted) on the arm 26 spaced apart from the pivot point connecting the bucket 27 and the arm 26. One end of the bucket cylinder 28 is connected and the other end is connected to the bucket 27.

The boom cylinder 23 controls the pivoting of the boom 24 and arm 26 relative to the boom post 20 centered on the second pivot point P2, and the bucket cylinder 28 controls the arm 26 Adjust the refraction angle of the bucket 27 for Accordingly, various operations can be implemented by pivoting the boom 24 and the arm 26 through the boom cylinder 23 and adjusting the angle of the bucket 27 with respect to the arm 26 through the bucket cylinder 28.

FIG. 5 is an enlarged detailed view of part 'A' of FIG. 3, a perspective view of a boom post including a front loader quick joint according to an embodiment of the present invention, and FIG. 6 is a side view of the boom post of FIG. 5 to be.

5 and 6, the boom post 20 includes a pair of left and right side plates 20a and 20b and one or more connection plates 20c provided to connect the two side plates 20a and 20b. . Between the two side plates 20a and 20b, the first binding point U1 is first bound to the bound shaft 14 of the boom post support 10 or released from the bound shaft 14 in the present invention A quick joint (3) is provided.

The quick joint 3 is for quick detachable coupling of the front loader 2 to the tractor 1, and includes a coupling member 30. The binding member 30 may be formed in a hook shape as shown in the drawing, and the first pivot point P1 of the boom post 20 constituting the front loader 2 through the first pivot shaft 31 It can be pivotably connected to.

A spring member 32 is connected to the binding member 30 . The spring member 32 applies elastic force in the direction of releasing the binding member 30 from the to-be-bound shaft 14 of the boom post support 10 described above. The spring member 32 may be a tension spring, and one end and the other end may be connected to the first spring connector 304 formed in the binding member 30 and the second spring connector 204 of the boom post 20, respectively.

The quick joint 3 also rotates the coupling member 30 in the direction of coupling to the shaft 14 to be coupled, or releases the coupling member 30 from the shaft 14 to be coupled 34 ).

A part of the lock unit 34 is provided to come into contact with the binding member 30, rotates the fixing pin 33 provided on the side of the boom post 20 as a rotation center, and binds at the binding position A1 A lock pin 36 for restraining the behavior of the member 30 (up and down tilting behavior of the binding member 30 with the first pivot shaft 31 as the center of rotation) is provided.

The lock pin 36 moves along a guide slot 38 formed in the boom post 20 . In addition, a portion of the outer surface of the coupling member 30 is provided in contact with a portion of the upper surface of the coupling member 30 inside the boom post 20 . Accordingly, by the lock pin 36 moving along the guide slot 38, the binding member 30 can be rotated in a direction in which it is bound to the shaft 14 to be bound or in a direction in which it is released from the shaft 14 to be bound. have.

The guide slot 38 is formed in an arc shape along the motion (rotational motion) trajectory of the lock pin 36 centered on the fixing pin 33, thereby dividing the movement path of the lock pin 36. A fixing groove 380 may be formed in the guide slot 38 on the same line as the binding position A1 where the lock pin 36 restricts the behavior of the binding member 30 .

The fixing groove 380 may be formed to a predetermined depth in a radial direction of the motion trajectory toward the fixing pin 33 . A predetermined depth, that is, the depth of the fixing groove 380 may be at least equal to or larger than the diameter of the lock pin 36 . This is because the depth of the fixing groove 380 must be at least equal to or larger than the diameter of the lock pin 36 so that the vertical movement of the lock pin 36 can be stably suppressed in the fixing groove 380 .

When the lock unit 34 rotating around the fixing pin 33, specifically, the lock pin 36 reaches the binding position A1, the lock spring 37, which will be described later, elastically moves the lock pin (36) is inserted into the fixing groove (380) and fixed, thereby restricting the behavior of the binding member (30). That is, when the lock unit 34 is operated to the binding position A1, the binding member 30 is in a non-movable state.

In the embodiment of the present invention, the binding position (A1) is preferably the rotational position of the lock unit 34 at the time when the binding shaft 14 is inserted into the predetermined binding position of the binding member 30 and the separation resistance is generated. can be That is, the rotational position of the lock unit 34 when the rotation of the boom post 20 centered on the first coupling point U1 is suppressed by the coupling member 30 coupled to the coupling shaft 14 can

The configuration of the present invention will be looked at in more detail.

7 is a perspective view of a lock unit;

Referring to FIG. 7 , the lock unit 34 includes a pair of left and right lock levers 35 using the fixing pin 33 as a pivot axis. In addition, the above-described lock pin 36 provided so that a portion of the outer surface comes into contact with a portion of the coupling member 30 is provided. At this time, the fixing pin 33 may be fixed to the side plates 20a and 20b by welding or screwing, and a part of the lock pin 36 is a straight force transmission surface 302 at the top of the binding member 30 It may be provided to come into contact with.

A long hole 350 into which the fixing pin 33 is inserted is formed in the pair of left and right lock levers 35 arranged in parallel, so that within the range partitioned by the long hole 350, the lock lever 35 is the fixing pin Relative linear motion along (33), the lock pin (36) can be connected at right angles between the lock lever (35) on the opposite side of the fixing pin (33).

The lock pin 36 is also provided to be movable along the guide slot 38 described above. Accordingly, as the lock lever 35 rotates around the fixing pin 33, the lock pin 36 moves along the movement path partitioned by the guide slot 38 and moves to the specific position (locking position) , A1) constrains the behavior of the binding member 30 or releases the constraint.

The fixing pin 33 and the lock pin 36 may be connected by a lock spring 37. The lock spring 37 may be a tension spring and imparts an elastic force to the lock pin 36 toward the fixing pin 33 . Accordingly, with the elastic force acting on the lock pin 36 at the binding position A1, the lock lever 35 retreats in a direction in which the radius of rotation thereof decreases, and eventually the lock pin 36 is attached to the fixing groove 380. inserted

That is, the lock pin 36 can be automatically inserted and fixed into the fixing groove 380 by the elastic restoring force of the lock spring 37 at the binding position A1, and the lock pin 36 at the binding position A1 When positioned, since the binding member 30 is in a state of being bound to the to-be-bound shaft 14, rotational behavior of the binding member 30 is suppressed by inserting the lock pin 36 into the fixing groove 380.

As a result, the lock pin 36 is automatically inserted and fixed into the fixing groove 380 by the elastic restoring force of the lock spring 37 at the engagement position A1, and thereby the engagement member 30 and the engagement shaft ( 14) is maintained in a bound state by the lock pin 36 inserted and fixed into the fixing groove 380 in a state of being firmly bound to each other.

It is a conceptual diagram for explaining the layout of the guide slot of FIG. 8 .

Referring to FIG. 8 , the guide slot 38 may be formed with a width that may have a slight margin between the guide slot 38 and the lock pin 36 . The guide slot 38 preferably has the fixing pin 33 as a center of curvature, but has a radius of curvature R rather than a distance D1 from the first pivot axis 31 to the outermost edge of the binding member 30. It may be formed in a small circular arc shape.

The rotational stroke of the coupling member 30 centered on the first pivot shaft 31 may be determined by the arc length of the guide slot 38 . At this time, the length of the arc of the guide slot 38 is such that the binding member 30 moves from the binding shaft 14 at the point where the to-be-bound shaft 14 is located at a predetermined binding position of the binding member 30 and generates a binding force. It may be determined as a range that can be completely released and released.

Meanwhile, in FIGS. 4 to 6, reference numerals 102 and 104 denote a fastening surface formed on the boom post support 10 toward the boom post 20 and a stopper protruding further toward the boom post 20 than the fastening surface, respectively. Reference numeral 202 indicates a binding plate formed on the boom post 20 corresponding to the binding surface 102 .

In coupling the boom post 20 to the boom post support 10, immediately after the coupling pin 22 of the boom post 20 is coupled to the coupling groove 12 of the post support 10, the coupling surface 102 When the binding plate 202 starts to come into contact with the binding surface 102, and the binding plate 202 is completely in close contact with the binding surface 102, the binding shaft 14 and the binding member 30 can be bound. The boom post 20 is seated in a possible rotational position.

The functions of the fastening surface 102, the stopper 104, and the fastening plate 202 will be described in more detail with reference to a drawing illustrating a process of attaching a front loader to a tractor in FIG. 9 .

9 is a view showing the operation state of the quick joint when the front loader is attached to the front part of the tractor.

As shown in FIG. 9, the connection between the tractor 1-side boom post support 10 and the front loader 2-side boom post 20 for attaching the front loader 2 to the front of the tractor 1 is 1 After first binding the binding point (see attached FIG. 3, U1), in that state, simple through mutual binding of the quick joint 3 with respect to the axis to be bound 14 at the second binding point U2 can be implemented

Looking more specifically, first, the tractor 1 is moved toward the front loader 2 placed on the ground (refer to the direction of the arrow in FIG. 9 (a)) to attach the boom post support 10 on the tractor 1 side It is bound to form a structure in which the fastening pin 22 at the bottom of the boom post 20 is seated in the groove 12 (Fig. 9 (b)). In that state, the tractor (1) is slightly further moved forward toward the front loader (2).

Right after the attachment pin 22 at the bottom of the boom post 20 is attached to the attachment groove 12 of the post support 10 (FIG. 9(b)) by the continued advancement of the tractor 1, the attachment groove ( 12), the binding plate of the boom post 20 is attached to the binding surface 102 of the boom post support 10 according to the counterclockwise rotation of the boom post 20 with the binding pin 22 attached to the boom post 20 as the center of rotation. (202) begins to touch.

After that, as shown in (c) of FIG. 9, when the structure in which the binding plate 202 comes into contact with the binding surface 102 in a completely adhered manner, the first binding point (U1, the part where the binding pin is attached to the binding groove) Relative rotation (counterclockwise rotation in the drawing) of the boom post 20 with respect to the center is suppressed, and at this time, the boom post 20 is at a rotational position where the binding member 30 can be bound to the shaft 14 to be bound. will be placed

In addition, when the structure in which the binding plate 202 comes into contact with the binding surface 102 in a completely adhered manner, the binding and binding of the binding pin 22 to the binding groove 12 at the first binding point U1 Up and down movement of the boom post 20 with respect to the boom post support 10 is also suppressed due to the stopper 204 in the form of surrounding the upper edge of the plate 202 .

As shown in (c) of FIG. 9, the boom post 20 is positioned at a rotational position where the binding member 30 can be coupled to the binding shaft 14 in a state in which the boom post 20 is no longer rotated. When the boom post 20 reaches a position where the binding member 30 can be bound to the binding shaft 14, the binding member 30 through the lock unit 34 as shown in (d) of FIG. ) is bound to the binding shaft 14.

FIG. 11 is an enlarged view of a main part showing a binding process of a quick joint with respect to an axis to be bound at a second binding point.

Referring to FIG. 11, when force is applied to the lock unit 34 to move it to the binding position A1 as shown in (a) of FIG. 10, the binding member 30 together with the lock pin 36 moves to the first pivot point ( It rotates around P1) and is bound to the shaft 14 to be bound, and at the binding position A1, the lock lever 35 retreats and the lock pin 35 retreats as shown in (b) of FIG. 11 by the elastic force of the lock spring 37 (36) is inserted into the fixing groove (380, see FIG. 6).

That is, the lock pin 36 is automatically inserted and fixed into the fixing groove 380 by the elastic restoring force of the lock spring 37 at the binding position A1, and at this time, the binding member 30 is already coupled to the shaft 14 ), the behavior (tilting) of the binding member 30 is constrained by the lock pin 36 being inserted into the fixing groove 380, and eventually the binding member 30 and the axis to be bound 14 ) remain firmly bound to each other.

On the other hand, the removal of the front loader 2 is performed in the reverse order of the above-described assembly, when the lock pin 36 inserted into the fixing groove 380 is pulled forward and slightly pushed upward, the spring member 32 is a binding member The coupling member 30 is rotated in a direction in which the coupling member 30 is released from the coupling shaft 14 by the elastic force provided to 30, and the coupling between the two components is released.

In that state, the front loader 2 can be easily removed by reversing the tractor 1 little by little.

According to the front loader quick joint according to the embodiment of the present invention reviewed above, it is a fastening method using a hook-shaped binding member, and the front loader is easily and quickly attached to the tractor without requiring a large force compared to the conventional pin connection method. can be attached or, conversely, the front loader can be detached from the tractor.

Therefore, the time required for attaching and detaching the front loader can be significantly reduced, and work delay can be reduced by the reduced time, so that work efficiency can be greatly improved. In addition, advantageous effects can be exerted not only to increase work convenience, but also to secure product competitiveness.

In the above detailed description of the present invention, only special embodiments have been described accordingly. However, it should be understood that the present invention is not limited to the particular forms mentioned in the detailed description, but rather it is understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims. It should be.

1: Tractor 2: Front Loader
3: quick joint 10: boom post support
12: binding groove 14: blood binding shaft
20: boom post 22: tie pin
23: boom cylinder 24: boom
25: cam plate 26: arm
27: bucket 28: bucket cylinder
30: binding member 31: first pivot shaft
32: spring member 33: fixing pin
34: lock unit 35: lock lever
36: lock pin 37: lock spring
38: guide slot 302: force transmission surface
350: long hole 380: fixed groove
A1: binding position P1: first pivot point
P2: 2nd pivot point U1: 1st binding point
U2: 2nd binding point

Claims (8)

As for the quick attachment and detachment of the front loader (2) to the tractor (1),
A hook-shaped binding member 30 pivotably connected to the first pivot point P1 of the boom post 20 through the first pivot shaft 31;
a spring member 32 for applying elastic force in a direction of releasing the coupling member 30 from the shaft to be coupled 14 on the boom post support 10 attached to the tractor 1;
A part is provided to be in contact with the binding member 30, and rotates with the fixing pin 33 provided on the side surface of the boom post 20 as a rotation center, and the binding member 30 at the binding position A1 a lock unit 34 with a lock pin 36 that constrains the behavior of ); and
An arc-shaped guide slot 38 formed on the boom post 20 and dividing a movement path of the lock pin 36 when the lock unit 34 rotates,
A fixing groove 380 is formed in the guide slot 38 on the same line as the binding position A1,
When the rotating lock unit 34 reaches the binding position A1, the lock pin 36 is inserted into the fixing groove 380 and restrains the behavior of the binding member 30 Front loader quick, characterized in that joint.
According to claim 1,
A front loader quick joint, characterized in that a part of the lower surface of the lock pin 36 is in contact with the linear force transmission surface 302 of the upper surface of the binding member 30.
According to claim 1,
The spring member 32 connects the first spring connector 304 of the coupling member 30 and the second spring connector 204 on the boom post 20 positioned below the first spring connector 304. Front loader quick joint, characterized in that the tension spring provided to.
According to claim 1,
The lock unit 34,
a lock lever 35 having a long hole 350 into which the fixing pin 33 is inserted;
a lock pin 36 connected at right angles to the front end of the lock lever 35 so that a part of its outer surface comes into contact with the force transmission surface 302 of the binding member 30;
A lock spring 37 connecting the fixing pin 33 and the lock pin 36 and imparting elastic force to the lock pin 36 toward the fixing pin 33;
As the lock lever 35 rotates around the fixing pin 33, the lock pin 36 moves along the movement path defined by the guide slot 38, and the behavior of the binding member 30 is controlled. A front loader quick joint characterized in that it binds or releases restraint.
According to claim 4,
A front loader quick joint, characterized in that the lock pin 36 is automatically inserted into the fixing groove 380 of the guide slot 38 at the binding position A1 by the elastic force of the lock spring 37.
According to claim 1 or 5,
The binding position (A1) is a front loader quick joint, characterized in that the rotational position of the lock unit (34) at the time when the shaft to be bound (14) is inserted into the predetermined binding position of the binding member (30).
According to claim 1,
The guide slot 38 has the fixing pin 33 as a center of curvature, but the curvature is greater than the distance D1 from the first pivot axis 31 to the outermost edge of the binding member 30. A front loader quick joint characterized in that the radius of curvature is formed in a small arc shape.
It is attached to the tractor (1) and is detachably fastened to the boom post support (10) on which the fastening surface (102) and the stopper (104) are formed, and the fastening plate (202) corresponding to the fastening surface (102) and the front of claim 1 A front loader including a boom post (20) having a loader quick joint (3).

Images