JP2008237166A - Implement-mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an implement-mounting device which can effectively absorb forward vibrations and impacts from an implement to a tractor body. <P>SOLUTION: This implement-mounting device in which the front portion and the rear end of a mounted hitch mechanism 5 are connected to the tractor body 2 and to a connection frame 6, respectively, and the implement S is mounted at the rear portion of the connection frame 6 is characterized in that the connection frame 6 comprises a first connection frame 6A connected to the rear end of the mounted hitch mechanism 5 and the second connection frame 6B movably mounted on the first connection frame 6A and connected to the implement S, and a buffer-mounting tool C mounted between the first connection frame 6A and the second connection frame 6B in a rearward-energized state is disposed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a work implement mounting apparatus for mounting a work implement such as a rotary tiller on a tractor vehicle body.

In a work machine connection device in which a connection frame is provided on a three-point link mechanism attached to a tractor, and a work machine is mounted on the connection frame, the upper and lower middle parts of the connection frame are divided, or the support bracket of the work machine By dividing the midway part in the front-rear direction or by dividing the midway part of the top mast of the working machine, and connecting the divided parts with an elastic body, vibrations and the like associated with the work can be detected on the tractor side. Can be suppressed (attenuated) or blocked (see Patent Document 1).
Japanese Patent No. 3602424

In the prior art, in the structure in which the middle part of the support bracket or the top mast is divided, it must be applied to each work machine, and the versatility is low. On the other hand, the structure in which the middle part of the connection frame is divided. Then, if applied to one connecting frame, it can be used for all work machines.
However, even in the configuration in which the middle part of the connection frame is divided, the top link and the upper engaging portion (top mast) of the work machine are connected to the upper part of the connection frame, and the lower link and the work machine are connected to the lower part of the connection frame. For example, when the work implement is driven like a rotary tiller, the forward pushing impact from the work implement side is large. It is difficult to sufficiently absorb vibration with the elastic body of the divided portion.

An object of this invention is to provide the working machine mounting apparatus which enabled it to solve such a problem of the prior art.
In the present invention, the connection frame includes a first connection frame connected to the rear end of the direct mounting hitch mechanism and a second connection frame connected to the work machine, and the second connection frame is formed with respect to the first connection frame. Work implement mounting device that can move forward and backward and can absorb vibrations and shocks in the forward direction from the work implement side to the tractor body by attaching it while urging it backward through a shock mount. The purpose is to provide.

Specific means for solving the problems in the present invention are as follows.
First, a work machine mounting device in which a connecting frame 6 is connected to a rear end of a direct mounting hitch mechanism 5 whose front part is connected to a tractor vehicle body 2, and a work machine S is mounted on the rear part of the connecting frame 6. ,
The connection frame 6 includes a first connection frame 6A connected to the rear end of the direct mounting hitch mechanism 5, and a second connection frame movably mounted on the first connection frame 6A and connected to the work implement S. 6B, and a buffer mounting tool C is provided between the first connecting frame 6A and the second connecting frame 6B while being biased backward.

Secondly, the direct mounting hitch mechanism 5 is constituted by a three-point link mechanism having a top link 3 and a pair of left and right lower links 4, and the second connecting frame 6B includes an upper engagement portion 10 and a work implement S. An upper connecting portion 7 and a pair of left and right lower connecting portions 8 that are detachably engaged with the pair of left and right lower engaging portions 11 are provided.
Thirdly, one of the first connection frame 6A and the second connection frame 6B is intruded and arranged inside the other.
Fourth, the first connecting frame 6A and the second connecting frame 6B are mounted by a pair of upper and lower shock absorbers C.

Fifth, the first connection frame 6A and the second connection frame 6B are mounted on the upper and lower sides with a buffer mounting tool C, and the other upper and lower side penetrates in the left-right direction, and the second connection frame 6B with respect to the first connection frame 6A. It is formed by the penetration pin 9 which accept | permits forward rotation of this.
Sixthly, the upper part of the second connection frame 6B is mounted on the first connection frame 6A with a through pin 9 penetrating in the left-right direction at a position above the upper connection part 7 and / or the connection pin 3B of the top link 3. Is mounted on the first connecting frame 6A via a buffer mounting tool C.
Seventh, the upper part of the second connection frame 6B is attached to the first connection frame 6A by a connection pin 3B for connecting the top link 3, and the lower part is attached to the first connection frame 6A via a buffer attachment C. It is characterized by.

Eighth, one buffer mounting tool C is disposed between the lower part of the first connection frame 6A and the lower part of the second connection frame 6B, one in the left and right pair or the left and right center.
Ninth, the shock absorber C includes an elastic body 15A that elastically presses the second connecting frame 6B backward, and an opposing elastic body that opposes the elastic body 15A and elastically presses the second connecting frame 6B forward. 15B.
Tenth, the shock absorber C includes a support member 16 fixed to one of the first connection frame 6A and the second connection frame 6B, an attachment member 17 fixed to the other, and the support member 16 and the attachment member 17. The guide pin 18 connected to one of the two and slidably inserted into the other, and the guide pin 18 is fitted between the support member 16 and the mounting member 17 to elastically press the second connecting frame 6B backward. And an elastic body 15 made of a coil spring.

11thly, it has the mounting fixing means 19 which restrains the relative movement of the 1st connection frame 6A and the 2nd connection frame 6B in the vicinity of the said buffer mounting tool C, It is characterized by the above-mentioned.
The work implement mounting device has the following effects according to the above configuration.
When the work implement S mounted on the tractor vehicle body 2 via the direct hitch mechanism 5 generates vibrations / impacts in the front-rear direction, the vibrations / impacts in the front direction are buffered by the buffer mounting tool C, Attenuated and propagated. In particular, when the work implement S is a rotary cultivator, the forward vibration and impact are large due to the rotational force of the down-cut claw, and the shock absorber C absorbs it.

The second connecting frame 6B is formed separately from the first connecting frame 6A, and is engaged with the upper engaging portion 10 of the work implement S and the pair of left and right lower engaging portions 11 so as to be freely disengaged, and the left and right connecting portions 7B. By providing a pair of lower connecting portions 8, if a plurality of devices having different distances between the upper connecting portion 7 and the lower connecting portion 8 are prepared, the first connecting frame 6 </ b> A can be shared and used in a plurality of types. The work machine S can be mounted.
One of the first connection frame 6A and the second connection frame 6B is intruded inside the other, and the front-rear dimensions are made compact.

By mounting the first connecting frame 6A and the second connecting frame 6B both vertically on the buffer mounting tool C, vibrations and impacts in the forward direction are absorbed more efficiently.
By attaching the first connecting frame 6A and the second series to the frame 6B, the upper and lower ones with the buffer mounting tool C, and the upper and lower other with the through pins 9, the upper and lower other mounting structure can be configured at low cost.
By attaching the upper part of the second connecting frame 6B to the first connecting frame 6A via the through pin 9 at a position above the connecting pin 3B of the upper connecting part 7 and / or the top link 3, the second connecting frame 6B The moving distance of the lower part can be increased, and the functional range of the shock absorber C can be expanded.

By attaching the upper part of the second connection frame 6B to the connection pin 3B for connecting the top link 3 of the first connection frame 6A, the number of parts can be reduced and the configuration can be simplified.
Between the lower part of the first connecting frame 6A and the lower part of the second connecting frame 6B, a pair of left and right or one left and right center can be mounted with one buffer mounting tool C.
Since the shock absorber C includes the elastic body 15A and the opposing elastic body 15B that elastically compresses the second connecting frame 6B in the front-rear direction, not only the forward vibration / impact of the work implement S but also the rearward vibration / impact. Can buffer.

By configuring the shock mount C with the mounting member 17, the mounting member 17, the guide pin 18, the elastic body 15, and the like, a buffering action can be performed while firmly mounting the first connecting frame 6A and the second connecting frame 6B. .
By providing and fixing the mounting fixing means 19 in the vicinity of the shock mount C, the relative movement of the first connecting frame 6A and the second connecting frame 6B is restricted, and the first connecting frame 6A and the second connecting frame 6B Can be used as one connecting frame 6 that does not have a buffering action, and can be used to mount the work machine S that does not generate much vibration and impact.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to effectively absorb the vibrations and shocks in the forward direction from the work implement side to the tractor vehicle body with the shock absorber of the connecting frame divided into two.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1-8, 1st Embodiment of the working machine mounting apparatus 1 applied to the tractor is shown, The working machine S illustrated by the rotary tiller is in a special state (mounted state of a special three-point link specification). By changing the top link 3 of the direct mounting hitch mechanism (three-point link mechanism) 5 described later to the standard three-point link specification state, the standard three-point link specification state is obtained, and the two-point link mechanism (Direct mounting hitch mechanism) and a two-point link mounting work machine can also be used to achieve a two-point link specification mounting state.

In each state, the tractor vehicle body 2, the direct mounting hitch mechanism 5, the connecting frame 6 and the joint shaft 14 for standardizing the direct mounting hitch mechanism 5 are the same. The tractor vehicle body 2 has a top link bracket 22 fixed to the upper rear portion, a work machine lifting device 23 having a hydraulic cylinder mounted on the rear upper surface, a lower link pin 30 in the rear lower portion of the tractor vehicle body 2, and a PTO shaft 12 Protrudes rearward from the approximate center of the back.
The three-point link mechanism 5 includes a top link 3 and a pair of left and right lower links 4, and a front connecting portion 3 </ b> F of the top link 3 is connected to the top link bracket 22 via a pin, and a front connecting portion of the left and right lower links 4. 4F is connected to a lower link pin 30, and the lower link 4 is connected via a lift arm of a lifting device 23 and a lift rod so that it can be lifted and lowered.

A connecting frame 6 is connected to the rear end of the three-point link mechanism 5, that is, the rear ends of the top link 3 and the left and right lower links 4, and the work machine S is detachably attached to the connecting frame 6. The PTO shaft 12 and the PIC shaft 13 are connected by a joint shaft 14.
The working machine S forms a rotary machine frame 35 by projecting a support arm 34 to the left and right from a gear case 33 projecting forward from the PIC shaft 13, and fixing a transmission case and a side frame to the outer ends of the left and right support arms 34. A claw shaft is rotatably supported at the lower part of the case and the side frame, and a plurality of tilling claws are attached to the claw shaft.

Further, a top mast 36 is fixed on the gear case 33, a connection bracket 37 protruding forward is fixed to the left and right support arms 34, and a support frame extending rearward is connected so as to be swingable. A height adjustment mechanism is provided between the mast 36 and the height of the earthenware or the rear two wheels mounted on the rear portion of the support frame.
A pin at the front upper end of the top mast 36 of the work machine S forms the upper engaging portion 10, and a pin provided on the left and right connecting bracket 37 forms the lower engaging portion 11.
The connecting frame 6 is divided into two parts, the first connecting frame 6A connected to the rear end of the three-point link mechanism 5, and the first connecting frame 6A is movably mounted and connected to the work machine S. And the second connecting frame 6B.

The first connection frame 6A and the second connection frame 6B are rotatably connected by a through pin 9 having an upper portion penetrating in the left-right direction, and the lower portion is mounted by a pair of left and right buffer mounting tools C.
The first connecting frame 6A has a top link connecting pin 3B connected to the rear end of the top link 3 in the upper part so as to be detachable, and a lower link connecting pin 32 connected to the rear end of the lower link 4 in the lower part on the outside. It is provided in a protruding direction.
The first connection frame 6A has a main frame 41 formed in a square shape when viewed from the back with a square pipe (or round pipe, flat bar, etc.), and a top link connection pin at the center upper portion of the main frame 41 An upper body 42 that passes through 3B is fixed, a lower body 43 that projects lower link connecting pins 32 is fixed to the left and right lower portions, and lower ends of the left and right lower bodies 43 are connected by a lower frame member 44.

The upper body 42 is formed of two plates, and has a protruding portion 42a protruding rearward and upward from the insertion position of the top link connecting pin 3B. The protruding portion 42a is a protruding portion of the second connecting frame 6B. It is superposed with 46 a and is connected with a through pin 9. The penetrating pin 9 is located above the upper connecting portion 7 and the connecting pin 3B of the top link 3.
The second connection frame 6B is a square pipe (or round pipe, flat bar or the like) and has a horizontal center frame 45. Two plate members are erected from the center of the central frame 45 in the left-right direction. A standing body 46 is formed, a pair of receiving members 47 project downward from the left and right ends of the central frame 45, and an L-shaped support member 48 is fixed between the left and right receiving members 47 and the central frame 45. .

The upper portion of the standing body 46 is formed in a bifurcated shape to form an upper connecting portion 7 that is detachably engaged with the upper engaging portion 10 of the work machine S, and the front side portion of the upper connecting portion 7 is a front upper portion. The protrusion 46a is formed so as to protrude into the two plate members of the protrusion 42a.
The left and right receiving members 47 are formed with a rear opening recess on the back side, and form a pair of left and right lower connecting portions 8 that are detachably engaged with a pair of left and right lower engaging portions 11 of the work machine S. The receiving member 47 has a hollow inside, and a lock member 52 that prevents the engaged lower engaging portion 11 from being detached is pivotally supported.

As shown in FIGS. 2 and 3, the lock member 52 is rotatably supported by a receiving member 47 via a horizontal shaft 53. The rear portion of the lock member 52 has a lock recess 52a, and is connected to a lower connection. The lower engaging portion 11 engaged with the portion 8 is engaged from the rear side to prevent the lower engaging portion 11 from being detached.
The lock member 52 is biased in a direction to engage with the lower engagement portion 11 by a coil spring 54, and its front portion is connected to a mountain-shaped link 56 of the release means 55. The release means 55 has an arm 58 pivotally supported by a bracket 57 fixed to the standing body 46, the center of the link 56 is penetrated through the arm 58 in a relatively rotatable manner, and an operation lever 59 is fixed to the arm 58. By rotating the operation lever 59, the link 56 moves beyond the arm 58, and the lock member 52 rotates clockwise in FIG. 2 so that the engagement with the lower engagement portion 11 is released. It has become.

1, 3, and 7, the PTO shaft 12 and the PIC shaft 13 are interlocked and connected by a telescopic joint shaft 14, and a yoke 62 that is fitted and connected to the PIC shaft 13 at the rear end portion of the joint shaft 14. The yoke 62 is supported by the holder 61.
The holder 61 is supported between the vertical portions 48 a of the left and right support members 48, and is fixed to a cylindrical body 63 that rotatably supports the yoke 62 around the axis via a bearing, and to the back surface of the cylindrical body 63. A holding body 64 having a U-shape in plan view and a pair of left and right shaft portions 65 formed by penetrating and fixing pins to the left and right walls of the holding body 64 are provided.

The shaft portion 65 is arranged to be displaced rearward from the axial center of the cylindrical body 63, and the holder 61 is pivotally supported by the support member 48 via the shaft portion 65. The holding body 64 is provided with a positioning member 66 protruding in the radially outward direction, and this positioning member 66 can come into contact with a stopper 67 provided on the carrier member 48.
The holder 61 can swing around the shaft portion 65, and can be held in a posture in which the positioning member 66 is in contact with the stopper 67. The positioning member 66 and the stopper 67 control the posture of the yoke 62. It is a means.

The central frame 45, the left and right receiving members 47, and the holder 61 of the lower half of the second connection frame 6B are disposed inside the main frame 41 and the left and right lower members 43 of the first connection frame 6A. It overlaps. Thereby, the front-rear positional relationship between the lower link connecting pin 32, the yoke 62, and the holder 61 is made appropriate, and the front-rear dimension of the connecting frame 6 is reduced.
The shock absorber C is disposed between the horizontal portion 48b of the left and right support members 48 of the second connecting frame 6B and the lower frame member 44 parallel thereto.
The support member 16 is fixed to the horizontal portion 48b so as to protrude downward, the mounting member 17 is fixed to the lower frame member 44 so as to protrude upward, and the back surface of the support member 16 and the front surface of the mounting member 17 face each other. A guide pin 18 is provided so as to penetrate both, and an elastic body 15 made of a coil spring is disposed between the rear end of the guide pin 18 and the mounting member 17 and is fitted to the guide pin 18. .

The guide pin 18 is connected to the support member 16, is slidably inserted into the mounting member 17, and the elastic body 15 attaches the support member 16 to the mounting member. It serves to repress toward the 17th side, that is, to repress the lower part of the second connecting frame 6B backward with respect to the first connecting frame 6A.
Therefore, the upper part of the second connecting frame 6B is pivotally supported by the through-pin 9 relative to the first connecting frame 6A, and the guide pin 18 is slidably inserted into the mounting member 17 at the lower part. Is supported by the support member 16 and the mounting member 17 so that the backward movement is prevented and the forward movement is allowed. Further, the elastic body 15 is repressed backward, whereby the working machine The forward movement of the second connecting frame 6B due to the impact from S is absorbed by receiving elastic resistance from the elastic body 15.

In the shock absorber C, since the support member 16 is disposed on the front side of the mounting member 17, the support member 16 is elastically pressed by the elastic body 15 in the direction of approaching the mounting member 17 in the rear direction. The support member 16 can be configured to be urged in a direction away from the attachment member 17 by disposing the elastic body 15 between the attachment member 17 and the elastic member 15 therebetween.
1, 3, 4, 6, and 8, the horizontal portion 48 b of the left and right (left) support member 48 of the second connection frame 6 </ b> B has a control unit 24 that controls the lifting device 23 and the detection of the work implement S. A midway part of the transmission means 25 for interlockingly connecting the part 26 is supported.

The detection unit 26 is an angle detection sensor of the rear cover 70 of the rotary tiller as the work implement S, and the control unit 24 receives the angle detection signal from the detection unit 26 and operates the lifting device 23. Thus, an automatic plowing depth control mechanism is formed that detects changes in plowing depth due to changes in the unevenness of the field and soil quality, and maintains the plowing depth of the work implement S constant.
A bracket 71 that is long in the front-rear direction is attached to the horizontal portion 48b, and a first hook 72 is pivotally supported at the rear end of the bracket 71 so as to be swingable about the horizontal axis. The transmission means 25 on the tractor vehicle body 2 side is configured by connecting the connected inner wire 73 and fixing the outer wire 74 to the bracket 71.

A bracket 77 is provided on the upper surface of the main cover 76 or the support arm 34 of the rotary tiller S so as to project forward. A second hook 78 is pivotally supported on the front end of the bracket 77 so as to be swingable about the horizontal axis. An inner wire 79 connected to the detection unit 26 is connected to the free end side, and the outer wire is fixed to the bracket 77 to constitute the transmission means 25 on the work machine S side.
The first hook 72 and the second hook 78 engage with each other so as to be separable from each other. The first connection portion 25A provided on the second connection frame 6B and the second connection portion provided on the work machine S, respectively. 25B.

The first connecting portion 25A and the second connecting portion 25B are engaged when the work machine S is mounted on the connecting frame 6, and are engaged even if the second connecting frame 6B vibrates back and forth with respect to the first connecting frame 6A. The change in the angle of the rear cover 70 is transmitted to the control unit 24 through the engagement, and the transmission is cut off when the work implement S is detached from the connection frame 6.
FIG. 9 shows a modification of the lower structure of the first embodiment, and a mounting fixing means 19 for restraining the relative movement of the first connecting frame 6A and the second connecting frame 6B is provided in the vicinity of the shock mount C. .
The mounting fixing means 19 is formed of a fixing member such as a headed pin or bolt, and is inserted or screwed into the horizontal portion 48b of the carrying member 48 so that the tip thereof is in contact with the back surface of the mounting member 17. ing.

The mounting and fixing means 19 holds the support member 16 and the mounting member 17 in contact with each other without relative movement, and the function of the buffer mounting device C becomes invalid, and the second connection is made to the first connection frame 6A. The frame 6B is fixed to form an integral connecting frame 6, which can be used in the same manner as a conventional work machine mounting apparatus that is not divided into two parts.
The mounting fixing means 19 may be configured such that a bolt is inserted into the support member 16 and screwed into the mounting member 17.
The second connecting frame 6B has a special vertical distance L from the upper connecting portion 7 to the lower connecting portion 8 (shown in FIG. 5; the distance from the upper engaging portion 10 to the lower engaging portion 11 is the same). The distance L is formed so as to be suitable for a working machine S to be mounted such as a standard three-point link working machine.

In the second embodiment shown in FIG. 10, the work machine mounting apparatus 1 </ b> B has the first connecting frame 6 </ b> A and the second connecting frame 6 </ b> B mounted on both the upper and lower sides by the buffer mounting tool C.
In the lower shock absorber CD, the attachment member 17 of the first connection frame 6A protrudes upward from the rear edge of the lower frame member 44, and protrudes downward from the horizontal portion 48b of the left and right support members 48 of the second connection frame 6B. The guide pin 18 that is separated from the support member 16 in the front-rear direction and passes through both is made of a coil spring between the support member 16 and the attachment member 17 and between the rear end of the guide pin 18 and the attachment member 17. An elastic body 15 is arranged and fitted to the guide pin 18.

The elastic body 15A on the rear side of the lower shock-absorbing attachment CD elastically presses the second connecting frame 6B in the rear direction, and the elastic body 15B on the front side faces the elastic body 15A and is connected to the second connecting frame 6B. It is a counter-elastic body that presses 6B forward.
The support member 16 and the guide pin 18 can be moved back and forth with respect to the mounting member 17, and the front and rear elastic bodies 15A and 15B act on the mounting member 17 when moving back and forth. Absorbs vibration and shock. The upper shock absorber CU is provided with an upper mounting member 17U on the back surface of the protruding portion 42a of the upper body 42, and an upper support member 16U is provided on the front surface of the protruding portion 46a of the standing body 46. The upper support member 16U faces away in the front-rear direction, and a guide pin 18 provided on the upper mounting member 17U penetrates the upper support member 16U so as to be slidable relative to the upper support member 16U. The body 15A represses the second connecting frame 6B in the rearward direction, and the rear opposing elastic body 15B opposes the elastic body 15A and represses the second connecting frame 6B in the frontward direction. The front / rear vibration / impact of the work implement S is absorbed in the same manner as the lower shock-absorbing attachment CD.

Each of the upper and lower shock absorbers CU, CD can absorb the back-and-forth vibrations and shocks when absorbing the reaction to the forward impact or when performing the upper-cut tillage and forward-reverse tillage as well as the down-cut tillage. By the presence of both the mounting tools CU and CD, vibrations and impacts in the front-rear direction transmitted to both the top link 3 and the lower link 4 can be absorbed.
In the third embodiment shown in FIG. 11, the work machine mounting device 1C has a mounting structure that is upside down from that of the first embodiment. The first connecting frame 6A and the second connecting frame 6B have horizontal axes on the lower side by through pins 9. The upper part is attached by the upper shock-absorbing attachment CU shown in the second embodiment.

Therefore, in the third embodiment, the longitudinal shock / impact transmitted from the work machine S mainly to the upper portion of the second connection frame 6B is absorbed by the upper shock-absorbing mounting tool CU. Note that the upper shock absorber CU may omit the opposing elastic body 15B.
In the fourth embodiment shown in FIG. 12, the work implement mounting apparatus 1D is similar to the first embodiment in that the lower portions of the first connection frame 6A and the second connection frame 6B are mounted by the buffer mounting tool C. However, the upper part protrudes forward from the projecting part 46a of the standing body 46 to overlap with the top link connecting position of the upper body 42, and is connected by using the connecting pin 3B that connects the top link 3 instead of the through pin 9 is doing.

In the fifth embodiment shown in FIG. 13, in the work implement mounting apparatus 1E, the first connection frame 6A is inserted into the second connection frame 6B, contrary to the first embodiment, and the external shape is the first connection frame 6A. Is the second connection frame 6B of the first embodiment, and the second connection frame 6B is the first connection frame 6A of the first embodiment.
That is, the first connecting frame 6A is a square pipe that forms a central frame 45 of one horizontal character, and two plates are erected from the center in the left-right direction of the central frame 45 to form a standing body 46. A pair of lower bodies 43 protrude downward from the left and right ends of the frame 45, and the lower ends of the left and right lower bodies 43 are connected by a lower frame member 44.

The connecting pin 3B of the top link 3 is inserted into the standing body 46, and the lower link connecting pin 32 for connecting the lower link 4 to the inner surfaces of the left and right receiving members 47 protrudes inwardly.
The second connecting frame 6B has a main frame 41 formed by a square pipe in a substantially mountain shape when viewed from the back. The upper body 42 is fixed to the upper center of the main frame 41, and the receiving material 47 is fixed to the left and right lower portions. The lower ends of the left and right receiving members 47 are connected by a bottom plate 81.
The upper body 42 is formed with an upper connecting portion 7, the receiving member 47 is formed with a lower connecting portion 8, and the inside is hollow, and a lock member 52 is pivotally supported.

The lower frame member 44 and the bottom plate 81 are horizontally disposed, and a pair of left and right shock mounts C are disposed between the upper and lower sides of both members. As the buffer mounting device C, the one of the first embodiment can be used, and the mounting fixing means 19 can be disposed between the bottom plate and the lower frame member 44 in the vicinity or in the middle of each buffer mounting device C.
This fifth embodiment is particularly useful for mounting the work machine S that does not require the transmission means 25 and the holding tool 61, but when the transmission means 25 and the holding tool 61 are required, the main frame 41 or the bottom plate 81. What is necessary is just to comprise so that a bracket may be taken out from and supported.

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, in the first, second, fourth, and fifth embodiments, when the lower portions of the first connection frame 6A and the second connection frame 6B are mounted with the buffer mounting tool C, the pair of buffer mounting tools C are provided on the left and right sides. Only one may be provided on one side or the center on the left and right.

  In the third embodiment, the elastic bodies 15A and 15B of the upper shock absorber CU are removed, and the upper part of the second connection frame 6B whose lower part is pivotally supported by the penetration pin 9 with respect to the first connection frame 6A is set in a free state. In addition, an attachment such as a fork may be attached to the second connection frame 6B so that the attachment can be scooped around the through pin 9 for dumping.

It is a side view which shows 1st Embodiment of this invention. It is a side view of the principal part. It is a rear view. It is the perspective view seen from the front. It is an exploded side view. It is the lower perspective view seen from back. It is a cross-sectional side view of a holder. It is a side view of a transmission means. It is a side view which shows the modification which provided the attachment fixing means. It is a side view which shows 2nd Embodiment. It is a side view which shows 3rd Embodiment. It is a side view which shows 4th Embodiment. It is a rear view which shows 5th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Work implement mounting apparatus 2 Tractor vehicle body 3 Top link 3B Connecting pin 4 Lower link 5 Direct mounting hitch mechanism (three-point link mechanism)
6 connecting frame 6A first connecting frame 6B second connecting frame 7 upper connecting portion 8 lower connecting portion 9 penetrating pin 10 upper engaging portion 11 lower engaging portion 15 elastic body 15A elastic body 15B opposing elastic body 16 support member 17 mounting member 18 Guide Pin 19 Mounting Fixing Means 25 Transmission Means 61 Holding Tool C Buffer Mounting Tool S Working Machine

Claims (11)

A work in which the connecting frame (6) is connected to the rear end of the direct mounting hitch mechanism (5) whose front part is connected to the tractor vehicle body (2), and the work machine (S) is attached to the rear part of the connecting frame (6). A machine mounting device,
The connection frame (6) includes a first connection frame (6A) connected to a rear end of the direct mounting hitch mechanism (5), and is movably mounted on the first connection frame (6A) and the working machine ( S) and a second connecting frame (6B) connected to the shock absorber, and is mounted while being urged rearward between the first connecting frame (6A) and the second connecting frame (6B). (C) is provided, The working machine mounting apparatus characterized by the above-mentioned.   The direct mounting hitch mechanism (5) is constituted by a three-point link mechanism having a top link (3) and a pair of left and right lower links (4), and the second connection frame (6B) includes a work machine (S). An upper connecting portion (7) and a pair of left and right lower connecting portions (8) that are detachably engaged with the upper engaging portion (10) and the pair of left and right lower engaging portions (11), respectively, are provided. The working machine mounting device according to claim 1, wherein:   The work machine mounting device according to claim 1, wherein one of the first connection frame (6 </ b> A) and the second connection frame (6 </ b> B) is intruded inside the other.   The said 1st connection frame (6A) and the 2nd connection frame (6B) are mounted | worn with a pair of upper and lower buffer mounting tools (C), The Claim 1 characterized by the above-mentioned. Work machine mounting device.   The upper and lower ones of the first connection frame (6A) and the second connection frame (6B) are mounted by a buffer mounting tool (C), and the other upper and lower side penetrates in the left-right direction. The work machine mounting device according to any one of claims 1 to 3, wherein the work frame mounting device is mounted with a through pin (9) that allows the forward rotation of the two connecting frames (6B).   The upper part of the second connection frame (6B) is a first connection by a through pin (9) penetrating in the left-right direction at a position above the connection pin (3B) of the upper connection part (7) and / or the top link (3). The work machine mounting device according to claim 2, wherein the work machine mounting device is mounted on the frame (6A), and a lower portion is mounted on the first connection frame (6A) via a shock mounting device (C).   The upper part of the second connection frame (6B) is attached to the first connection frame (6A) by a connection pin (3B) for connecting the top link (3), and the lower part is attached to the first via a shock attachment (C). The work machine mounting device according to claim 2, wherein the work machine mounting device is mounted on the connection frame (6 </ b> A).   Between the lower part of said 1st connection frame (6A) and the lower part of the 2nd connection frame (6B), one buffer mounting tool (C) is arrange | positioned at the left-right pair or the left-right center, It is characterized by the above-mentioned. Item 4. The work machine mounting device according to Item 1.   The shock absorber (C) includes an elastic body (15A) that elastically presses the second connecting frame (6B) in the rear direction, and the elastic body (15A) facing the second connecting frame (6B) in the forward direction. The work implement mounting device according to any one of claims 1 to 8, further comprising an opposing elastic body (15B) that is elastically pressed against the work piece.   The shock absorber (C) includes a support member (16) fixed to one of the first connection frame (6A) and the second connection frame (6B), an attachment member (17) fixed to the other, and the support. A guide pin (18) connected to one of the member (16) and the attachment member (17) and slidably inserted into the other, and a guide pin (between the support member (16) and the attachment member (17)). The elastic body (15) made of a coil spring, which is fitted in (18) and represses the second connecting frame (6B) in the rearward direction. Work machine mounting device.   The mounting fixing means (19) for restraining relative movement of the first connecting frame (6A) and the second connecting frame (6B) is provided in the vicinity of the buffer mounting tool (C). The work implement mounting apparatus according to any one of the above.

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