JPS6237180B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a working machine attaching/detaching device for an earthmoving vehicle that allows a working machine such as a backhoe to be easily attached to and detached from the earthmoving vehicle as needed.

[Prior Art] Earthmoving vehicles are usually equipped with a removably auxiliary working machine such as a backhoe depending on the working conditions.

The conventional device shown in FIGS. 1 and 2 as a means for attaching and detaching the work equipment includes a vehicle side bracket 1 fixedly installed at the rear of the earthmoving vehicle T shown by the two-dot chain line on the right side of FIG. and a work machine side bracket 2 which is attached to a work machine B such as a backhoe, a part of which is shown by a two-dot chain line, and these brackets are configured to be removably connected to each other with pins. Specifically, when attaching work machine B to earthmoving vehicle T, first, while moving earthmoving vehicle T close to work machine B side, work machine B is attached to stabilizer S attached to it.
By moving the upper horizontal pin 3 of the work equipment side bracket 2 up and down with Match.
Next, the pin insertion hole 5 provided at the lower part of the vehicle side bracket 1 and the work equipment side bracket 2 is inserted.
and 6 are brought into communication with each other, and a connecting pin 7 (see FIG. 2) is artificially inserted into these pin insertion holes. The vehicle side bracket 1 and the work machine side bracket 2 are connected by pins, and the work machine B is mounted on the earthmoving vehicle T. When removing work machine B, the above steps may be performed in reverse.

However, in the conventional device described above, when installing the work machine B, the work machine or the earthmoving vehicle T is mechanically operated to insert the pin through the pin insertion hole 6 at the bottom of the work machine side bracket 2 and the pin at the bottom of the vehicle side bracket 1. Since it is necessary to position it so that it matches the hole 5,
This results in a considerable amount of time being spent on positioning.
Furthermore, the connecting pin must be inserted manually after positioning, which is extremely troublesome. Furthermore, when removing work machine B, since a considerable weight of work machine B is placed on the connecting pin 7 that must be removed first, it is necessary to knock out the connecting pin 7 with a tool while operating the work machine. Not only that, but the work is also quite troublesome. Therefore, with the above-mentioned conventional devices that require such complicated manual operations and work, it is completely impossible for an operator to attach and detach a working machine such as a backhoe by himself, which inevitably makes the attachment and detachment work difficult. The reality is that this is the case.

In the conventional devices shown in FIGS. 3 and 4, the devices shown in FIGS.
The base end of the turnbuckle 8 is pivoted to the lower part of the vehicle side bracket 1 shown in the figure, and the eye part 9 formed at the tip of the turnbuckle is attached to the lower part of the work equipment side bracket 2 when the work equipment is attached to the earthmoving vehicle. The connecting pins 7 are inserted into the eye portions of the pin insertion holes so as to match the pin insertion holes 6. In this case, there is an advantage that the eye portion 9 and the pin insertion hole can be easily matched by adjusting the pivoting and expansion/contraction of the turnbuckle 8. However, even in this case, adjusting the turnbuckle and inserting the connecting pin when installing the work equipment, as well as removing the connecting pin that carries the weight of the work equipment when removing the work equipment, are all manual tasks. The problem remains that it must be done directly. In addition, when the work implement B is attached to the earthmoving vehicle T, there is a new possibility that the turnbuckle 8 may come loose due to overload or the like while the work implement is in operation.

Therefore, as a measure to improve the above-mentioned conventional devices, the present inventor first proposed an installation device for removably installing a working device on an earthmoving vehicle, as described in Japanese Patent Application Laid-Open No. 52-62902. In this device, as shown in Figs. 5 and 6, the work machine side bracket 2'
The upper pin 3a and the lower pin 7a are installed horizontally in advance in advance, and a cutout surface 3 is formed in the center of at least one of the pins (the upper pin 3a in the figure).
b, 3c are formed. The vehicle side bracket 1' also has the above-mentioned upper pin 3a and lower pin 7a.
An upper pin receiving hole 4a and a lower pin receiving hole 5a are provided which are cut out to receive the pins from above, respectively. In the figure, the upper pin receiving hole 4a has a locking slit 4b having a width smaller than the diameter of the upper pin 3a, and has a locking slit 4b having a width that allows the cutout surfaces 3b and 3c of the upper pin 3a to be received therein to pass through vertically. The upper part is open, and the lower pin receiving hole 5a is opened to a width that allows the lower pin 7a to be inserted and removed as is.
Therefore, by rotating the upper pin 3a and making the cutout surfaces 3b and 3c vertical, the upper pin 3a can pass through the locking slit 4b of the upper pin receiving hole 4a with the cutout surface. If it is displaced in the horizontal direction, it will no longer be able to pass through the locking slit 4b. When attaching the working machine to an earthmoving vehicle, the upper pin 3a is rotated to make its notched surfaces 3b and 3c vertical, and the upper pin 3a is inserted into the upper pin receiving hole by passing it through the locking slit 4b. 4a, and the lower pin 7a is fitted into the lower pin receiving hole 5a at the same time. Next, by rotating and fixing the upper pin 3a approximately 90 degrees, the notch surfaces 3b and 3c are held approximately horizontally, thereby preventing the notch surfaces from passing through the locking slit 4b, and the work machine side Bracket 2'
and the vehicle side bracket 1' are connected and fixed.
To remove the work equipment from the earthmoving vehicle, turn the upper pin 3a to return the notch surfaces 3b and 3c to the vertical position, and in this state, raise the work equipment using the stabilizer. 3b, 3
c, passes upward through the locking slit 4b and leaves the upper pin receiving hole 4a, and at the same time the lower pin 7a
This is accomplished by separating upward from the lower pin receiving hole 5a.

Therefore, the device of the prior application described above does not perform the complicated and difficult manual work required in the conventional device shown in FIGS. This eliminates the need for aligning both pin insertion holes, inserting the connecting pin, and removing the connecting pin in the axial direction, which carries the weight of the work equipment, when removing the work equipment. It has achieved considerable results in that attachment and detachment can be carried out much more easily than conventional devices. However, even with this device of the prior application, there remains a slight problem in that when attaching or detaching the working machine, the pin with the notched surface portion as described above must be directly rotated manually. There was found.

Therefore, this new invention was made.

[Problems to be Solved by the Invention] The main problem of the present invention is to perform positioning by interlocking the hook portion and the hook receiving portion provided on the work equipment side bracket and the vehicle side bracket, and to position the workpiece by the operator operating the operating means. By simply doing this, the engagement pins provided on the left and right sides of the work equipment side bracket can be simultaneously locked or unlocked by displacement of the support member of the vehicle side bracket and the slit of the sleeve, thereby eliminating the hassle of attaching and detaching the work equipment. To provide a work equipment attachment/detachment device for an earthmoving vehicle that eliminates the need for work.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides the following: a vehicle side bracket installed on an earthmoving vehicle; and a work equipment bracket connected to a work equipment holding frame having a driver's seat. and a working equipment attachment/detachment device for an earthmoving vehicle which is equipped with a means for removably connecting the brackets on both sides, wherein: (a) a hook is integrally provided on the bracket on one side; (b) the hook (c) A hook receiving part is provided on the vehicle side bracket above or above the hook part or the hook receiving part, and is integrally formed with the other bracket at a position facing the above-mentioned other side bracket and which receives and engages the hook part in a detachable manner. (d) A support member having a fixing slit that removably receives the engaging pins is provided on the work machine. (e) Each of the pair of support members has a sleeve rotatably built in on the same axis, and the sleeve can be displaced by rotation of the sleeve and communicated with the fixing slit of the support member. (f) providing a rotating shaft that integrally connects the shaft core portions of the sleeves; (g) rotating the rotating shaft to bring the variable slit into a slit open position where the variable slit coincides with and communicates with the fixed slit; A technical measure is taken in which the variable slit is displaced from the fixed slit to provide an operating means for displacing and operating the slit to a closed position for locking the engaging pin received in the slit.

[Function] The work equipment side bracket is engaged with the hook part and the hook receiving part provided on the vehicle side bracket.

As a result, the support member and the engagement pin which are spaced apart at the upper stage or the lower stage are positioned.

At this time, that is, when the engaging pin is inserted, the support member is in the slit open position where the fixed slit and the variable slit of the sleeve built therein coincide and communicate.

Then, the engagement pin is fitted into the slit.

Next, when the operating means is operated to rotate the rotating shaft, the sleeves built into the left and right support members rotate, and the variable slit is accordingly displaced to the slit closing position where the opening of the fixed slit is closed.

As a result, the locking pin is locked to the support member, and together with the engagement between the hook portion and the hook receiving portion, the working machine is connected to the vehicle.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to FIGS. 7 to 10. The work equipment attachment/detachment device according to the present invention includes a vehicle-side bracket 11 fixed to the rear of an earthmoving vehicle T shown in FIG. The working machine side bracket 12 is detachably connected to the side bracket 11.

In FIG. 8, which shows each of the vehicle side bracket 11 and the work equipment side bracket 12 in more detail, the vehicle side bracket 11 has a pair of left and right brackets integrally projecting on the same horizontal axis, spaced apart from each other in the upper part of the vehicle side bracket 11 and facing each other in the horizontal direction. It is configured to include an engaging pin 13 and a hook portion 15 integrally formed at a position spaced apart below the pin. The hook receiving part 15 shown in the figure consists of a pin receiving hole with an open notch at the top, and is connected to the work machine side bracket 1.
A hook portion 17 integrally provided at the bottom of 2 is fitted into the hook portion 17. Therefore, the illustrated hook part 17 is horizontally suspended below the work machine side bracket 12, and when the work machine B is attached to the earthmoving vehicle T, the hook part 17 is inserted into the above-mentioned hook receiving part, that is, the pin receiving hole 15 from above. It consists of a hook pin that is removably inserted and engaged. The work machine side bracket 12 is integrally formed with a base frame, so-called work machine holding frame F, of a work machine B, such as a backhoe. The frame F is provided with a stabilizer S (see FIG. 7) for mechanically raising and lowering the work implement B, and has a work implement operating device 18 on the upper part, and a seat for an operator to operate the device. It is equipped with a driver's seat 19. Further, the work machine side bracket 12 has a pair of left and right support members 14 that are spaced apart above the hook portion, that is, the hook pin 17, and are fixed at positions corresponding to the engagement pins 13 of the vehicle side bracket 11. .

This support member 14 is made of a hollow body, and is opened horizontally from its axial center toward the outside in the radial direction, and is connected to the engaging pin 13 of the vehicle side bracket 11 from the front.
A fixing slit 20 is formed to removably receive the locking pin 13, and when the work implement B is attached to the vehicle T, the engaging pin 13 received in the deep part of the fixing slit 20 is removably locked. It has a built-in locking means 21.

The locking means 21, as shown in more detail in FIGS. 9 and 10, consists of a rotatable sleeve coaxially built into the support member 14, in which a variable slit 22 is provided as in the case of the support member 14. The illustrated example configuration is formed.

The variable slit 22 can be entirely brought into contact with the fixed slit 20 of the support member 14 or displaced from the communicating position by rotating its own locking means, ie, the sleeve 21.

Therefore, the sleeve 21 has a so-called variable slit 22 that is in contact with the fixed slit 20 of the support member, so that both slits 22 and 20 can receive the engagement pin 13 or extract the pin. The variable slit 22 is rotated between the slit open position and the slit closed position in which the variable slit 22 is displaced from the fixed slit 20 of the support member and locks the engaging pin 13 received in both slit bases. . In this embodiment, both slits 20 and 22 are formed with open bases centered on the respective axes of the coaxial support member 14 and sleeve 21. Therefore, the mutual base portions of both slits 20 and 22 always maintain a state of communication no matter what rotational position the sleeve 21 is in, and the above-mentioned engagement pin 1
There is no problem in rotating the sleeve 21 while receiving and holding the sleeve 21.

In this way, the mutual axes of the left and right sleeves 21 are integrally connected by the rotating shaft 23.

This rotary shaft 23 is interlocked with an operating means 24 for rotationally displacing the sleeve 21 at both ends to the slit open position and the slit closed position.

The operating means 24 includes a bracket bearing 2 mounted on the side wall of the work machine operating device 18 above the work machine side bracket 12.
5, and a linkage 27 that links the operating lever to the rotating shaft 23.
The illustrated example configuration is such that it can be rotated back and forth within a range of 90 degrees.

Next, the operation of the above embodiment will be explained. When installing the work machine B on the earthmoving vehicle T, first, the vehicle side bracket 11 and the work machine side bracket 12 are brought close to each other by driving the earthmoving vehicle T. Further, the operating lever 26 is tilted to the solid line position in FIG. 8 to displace the sleeve 21 to the slit opening position. Also, the variable slit 22 of the sleeve
are in mating communication with the fixing slits 20 of the support member 14 to keep them open.

In this state, the work machine B is raised and lowered by the stabilizer S, and the hook pin 17 at the bottom of the work machine side bracket 12 is fitted and supported in the pin receiving hole 15 at the bottom of the vehicle side bracket 11 from above.

Next, the support member 14 and the built-in sleeve 21
Both slits 20 and 22 are fitted into the engagement pin 13 on the upper part of the vehicle side bracket 11.

As a result, when the pin 13 is received in the inner part of both the slits 20 and 22, that is, in the mutual base of these slits, the operating lever 2
6 at the dotted line position in FIG.

Then, the sleeve 21 is rotated approximately 90 degrees from the slit open position shown in FIGS. 8 and 9 via the linkage 27 and the rotating shaft 23, and is held in the slit closed position shown in FIG. .

Also, the fixing slit 20 of the support member 14
Since the upper engaging pin 13 is closed by the sleeve 21, the upper engaging pin 13 is locked at the inner part of both the slits 20 and 22 and cannot be removed.

By thus connecting the vehicle side bracket 11 and the work machine side bracket 12, the work machine B is firmly attached to the earthmoving vehicle T.

When removing this work machine B from the earthmoving vehicle T,
The above steps can be performed in reverse. That is, by rotationally displacing the sleeve 21 to the slit opening position using the operating lever 26, the engagement pin 13 is unlocked by the sleeve. In this state, the slits 2 of both the support member 14 and the sleeve 21
After the engagement pin 13 is removed from 0 and 22, the hook pin 17 is removed upward from the lower pin receiving hole 15. Then, the vehicle side bracket 11 and the work machine side bracket 12 are separated, and the work machine B is removed from the earthmoving vehicle T.

In the above embodiment, the hook pin 17 and its pin receiving hole 15 may be attached to the vehicle side bracket 11 and the working machine side bracket 12 in the opposite manner to the case shown in the drawings. However, in this case, the pin receiving hole 15 is formed in the work machine side bracket 12 so as to face downward, and is fitted from above into the hook pin 17 suspended horizontally on the vehicle side bracket 11. Furthermore, the hook pin 17 may be replaced with a member that extends substantially horizontally toward the mating bracket and has a hook-shaped portion on the tip side. In this case, the mating bracket may have a socket for the hook-shaped portion formed in the front thereof.

In short, this invention can be implemented with various modifications without changing the gist.

[Effects of the Invention] According to the present invention, the pair of left and right engagement pins provided on the work equipment side bracket and the vehicle side bracket are connected by the hook portions and the hook receiving portions provided on the work equipment side bracket and the vehicle side bracket. A pair of left and right support members provided on the bracket are positioned.

Then, by operating the operating means, the rotating shaft rotates and the sleeve built into the support member rotates, displacing the variable slit to the slit open position where the engagement pin can be inserted and the slit closed position where it can be locked. Can be displaced.

As a result, the left and right sleeves or slits can be simultaneously operated to the locking or unlocking position simply by operating the rotating shaft, which is advantageous due to its excellent operability.

In addition, the sleeve or variable slit, which is the locking means for the engagement pin, can be moved to the locked or unlocked position simply by rotating within the support member, so it can be reliably locked and does not require space for displacement, which saves space. Excellent in

Then, the work equipment side bracket and the vehicle side bracket can be positioned simultaneously without requiring any human intervention other than the operator of the vehicle, and the operator engages the hook part and the hook receiving part by manipulating the vehicle side bracket, thereby simultaneously positioning the work equipment side bracket and the vehicle side bracket. With the engagement pin received in the support member, the sleeve can be rotated and locked using the operating means, and the lock can be released by reversing the procedure, so it has the special effect of allowing one-touch attachment and detachment of the work equipment. play.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing a conventional work equipment attachment/detachment device, Fig. 2 is a sectional view taken along line - in Fig. 1,
Fig. 3 is a schematic side view showing a different conventional work equipment attachment/detachment device, Fig. 4 is a sectional view taken along the line -- in Fig. 3, Fig. 5 is an exploded perspective view of the device of the earlier application, and Fig. 6 is the earlier application. FIG. 7 is a schematic side view of a work implement attaching/detaching device according to a preferred embodiment of the present invention, and FIG. 8 is a partial cross-sectional view showing the connection state between the vehicle side bracket and the work machine side bracket related to the device. 9 and 10 are cross-sectional views for explaining the functions of the main parts. In the diagram, T is the earthmoving vehicle, F is the work equipment holding frame,
11 is a vehicle side bracket, 12 is a work machine side bracket, 13 is an engagement pin, 14 is a support member, 1
5 is a hook receiving part, 17 is a hook part, 19 is a driver's seat, 2
0 is a fixed slit, 21 is a sleeve, 22 is a variable slit, and 24 is an operating means.

Claims (1)

[Claims] 1. A vehicle side bracket installed on an earthmoving vehicle;
A work equipment attachment/detachment device for an earthmoving vehicle is provided with a work equipment side bracket connected to a work equipment holding frame having a driver's seat, and means for removably connecting the brackets on both sides. a hook part integrally provided on the bracket; a hook receiving part integrally formed on the other side bracket at a position facing the hook part to receive and engage the hook part in a detachable manner; A pair of engaging pins are integrally protruded apart from above or below the hook part or the hook receiving part, extend horizontally and face each other on the same axis, and a fixing slit is formed to removably receive the engaging pins. a pair of support members fixed to the work machine side bracket; and a variable slit that is coaxially rotatably built into each of the pair of support members and that opens and closes the fixed slit by rotation of the variable slit. a rotating shaft that integrally connects the shaft cores of the sleeves; a slit opening position where the rotating shaft is rotated so that the variable slit coincides with and communicates with the fixed slit; and a slit opening position where the variable slit is displaced from the fixed slit. and an operating means for displacing and operating an engaging pin received in the slit to a slit closed position for locking the engaging pin received in the slit. 2. The operating means includes an operating lever that is pivotally supported via a bracket bearing on a side wall of a working equipment operating device provided above a bracket on the working equipment side, and a linkage that links the operating lever to a rotating shaft. ,
2. The work equipment attachment/detachment device for an earthmoving vehicle according to claim 1, wherein the rotating shaft can be rotated reciprocatingly at a predetermined rotation angle using a control lever.