JP2002255480A - Mounting/demounting mechanism for side frame of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform work easily and in a short time for mounting/demounting a side frame of a construction machine relating to a lower frame. SOLUTION: This mounting/demounting mechanism 14 for a side frame of a construction machine freely connects the side frame 7 and a lower frame 1 of the construction machine, a guide groove 17 opened downward diagonally is provided in a tip end upper part of a connection plate 16 constituting a connection part 15 of the side frame 7, and a pin hole 11 for inserting a connection pin 13 fitted is drilled to open in a lower part of this connection plate 16, while an engaging pin 19 guiding the guide groove 17 for engaging with it is fixedly provided in a tip end upper part of a connection plate 4, 4 constituting a connection part 3 provided in a tip end part of the lower frame 1, a pin hole 6, 6 for inserting the connection pin 13 fitted by position aligning to the pin hole 11 is drilled to open in a lower part of the connection plate 4, 4, and a stopper 18 for positioning the side frame 7, rotated when the guide groove 17 is engaged with the engaging pin 11, is fixedly provided in the side frame 7 or the lower frame 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side frame attaching / detaching mechanism for a construction machine, and more particularly, to a side frame attaching / detaching mechanism for a construction machine in which a side frame and a lower frame can be easily connected in a large crane or the like. It concerns the mechanism.

[0002]

2. Description of the Related Art Conventional large cranes require disassembly and assembly of counterweights, side frames, booms, and the like when moving at a work site due to restrictions on transportation weight. Therefore, for example, a side frame attaching / detaching mechanism is provided for disassembling and assembling the side frame. The side frame attaching / detaching mechanism will be described with reference to FIGS.

In FIG. 4, reference numeral 1 denotes a lower frame of a crane main body. The lower frame 1 has legs 2, 2,... Extending in four directions, and as shown in FIG. , A connecting portion 3 are provided. The connecting portion 3 has two connecting plates 4 and 4 which are vertically arranged side by side with a predetermined space therebetween. Two pin holes 5 and 6 are formed in each connecting plate 4 vertically apart. Have been.

In FIG. 1, reference numeral 7 denotes one side frame provided on the right and left sides of the crane. The side frame 7 has a connecting portion connected to the connecting portion 3 of the lower frame 1. The connecting portion 8 is provided with a connecting plate 9, and the connecting plate 9 has the pin holes 5, 5, 6, 6 and 6 formed in the connecting plates 4, 4 of the lower frame 1. Pin holes 10 and 11 corresponding to are formed.

When the side frame 7 is connected to the lower frame 1, the side frame 7 is lifted while the lower frame 1 is fixed by appropriate means, and the pin holes of the lower frame 1 are lifted. 5,5 and 6,6
After visually aligning the upper and lower two pin holes 10 and 11 of the side frame 7 with each other, the two connecting pins 1
The lower frame 1 and the side frame 7 are connected by inserting the second frame 2 and the second frame 13 respectively.

When the side frame 7 is to be removed from the connected state, the lower frame 1 is fixed by appropriate means, and then the side frame 7 is lifted and a force is applied to the two connecting pins 12 and 13. Then, the connection pins 12 and 13 are pulled out of the lower frame 1 and the side frame 7 is removed from the lower frame 1.

[0007]

When the side frame is connected to the lower frame, the side frame attaching / detaching mechanism of the conventional construction machine is lifted by lifting the side frame to form four pin holes in the lower frame and the side frame. After visually aligning the two pin holes of the frame with each other,
The lower frame and the side frame are connected by inserting the respective connecting pins.

However, the side frame attaching / detaching mechanism of the construction machine has a problem that it is difficult to align a pin hole and to insert a connecting pin into the pin hole, which requires a long working time.

Therefore, there arises a technical problem to be solved in order to easily and quickly attach and detach the side frame of the construction machine to the lower frame, and the present invention solves this problem. The purpose is to:

[0010]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and is directed to a side frame attaching / detaching mechanism for a construction machine capable of freely connecting a side frame and a lower frame of the construction machine. A guide groove which opens diagonally downward is provided at the upper end of the connecting plate constituting the connecting portion of the side frame, and a pin hole for inserting a connecting pin is formed at a lower portion of the connecting plate. An engaging pin for guiding the guide groove and engaging with the guide groove is fixedly provided at an upper portion of a connecting plate constituting a connecting portion provided at a lower end portion of the lower frame, and the pin hole is provided at a lower portion of the connecting plate. And a stopper for positioning the rotating side frame when the guide pin is engaged with the engagement pin, and a pin hole for inserting the connection pin is formed. The above Id frame or the construction machine which is fixed to the Lower frame side frame desorption mechanism.

[0011] In a side frame attaching / detaching mechanism for a construction machine that allows the side frame and the lower frame of the construction machine to be freely connected, an upper part of a connecting plate constituting a connecting part provided at the end of the lower frame is obliquely upwardly mounted. In addition to the provision of a guide groove which is open at the same time, a pin hole for inserting a connection pin is formed in a lower portion of the connection plate, while the guide groove is formed at an upper end of a connection plate constituting a connection portion of the side frame. An engaging pin for guiding and engaging with the guide groove is fixedly provided,
In addition, a pin hole for inserting the connecting pin is formed in the lower portion of the connecting plate by aligning with the pin hole, and further, when the engaging pin is engaged with the guide groove, it rotates. An object of the present invention is to provide a side frame attaching / detaching mechanism of a construction machine in which a stopper for positioning the side frame is fixed to the lower frame or the side frame.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. For convenience of description, the same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. First, the invention according to claim 1 will be described. In FIG. 1, reference numeral 14 denotes a side frame attaching / detaching mechanism.
A guide groove 17 that opens diagonally downward is provided at the upper end of the connecting plate 16 that forms the connecting portion 15 of FIG. A pin hole 1 for inserting the connecting pin 13 is provided in a lower portion of the connecting plate 16.
1 is opened.

Furthermore, the side surfaces of the pin holes 11 and the both side surfaces of the connecting plate 16 on the base end side are in contact with the distal end portions of the connecting plates 4 and 4 of the lower frame 1. Two stoppers 1 for positioning the frame 7
8, 18 are fixed.

On the other hand, a guide for guiding the guide groove 17 between the pin holes 5 and 5 formed in the upper ends of the two connecting plates 4 and 4 of the lower frame 1 and engaging with the guide groove 17. The mating pin 19 is fitted. Then, the lower portions of the connecting plates 4 and 4 are aligned with the pin holes 11, and the connecting pins 13 are formed.
Are inserted into the pin holes 6 and 6 for fitting. still,
The number of the connection plates 4 and 4 is not limited to two.

As shown in FIG. 2, when the side frame 7 is connected to the lower frame 1, the side frame 7 is lifted while the lower frame 1 is fixed by appropriate means. When the side frame 7 is lowered, the opening of the guide groove 17 of the side frame 7 is engaged with the engagement pin 19, and when the side frame 7 is further lowered, the engagement pin 19 is formed on the inner bottom of the guide groove 17. The side frame 7 is rotated in the clockwise direction with the engagement pin 19 as a fulcrum in the figure, and the stoppers 18, 18 are brought into contact with the distal ends of the connecting plates 4, 4 of the lower frame 1. In contact therewith, the side frame 7 is positioned.

In this state, the pin hole 1 of the side frame 7 is
1 is aligned with the pin holes 6, 6 of the lower frame 1, and the connection pins 13 can be inserted into the pin holes 6, 6, and 11, whereby the side frame 7
Is connected to the lower frame 1.

When the side frame 7 is to be removed from the connected state, the lower frame 1 is fixed by appropriate means, and then the side frame 7 is lifted up to a state where no force is applied to the connecting pins 13. When the connecting pin 13 is pulled out and the side frame 7 is further pulled up, the engaging pin 19 is disengaged from the guide groove 17,
The side frame 7 is removed from the lower frame 1.

Thus, according to the present invention, the positioning of the connecting portion 3 of the lower frame 1 and the connecting portion 15 of the side frame 7 becomes extremely easy by the guide groove 17 and the stoppers 18, 18. 7 can be easily performed in a short time.

If a hydraulic cylinder (not shown) is provided on the connecting pin 13, the connecting pin 13 can be easily attached and detached. Further, the stoppers 18, 18 are fixedly provided on both sides of the connecting plate 16 of the side frame 7. Alternatively, the stoppers 18, 18 may be fixedly provided between the connecting plates 4, 4 of the lower frame 1. .

Next, the second aspect of the present invention will be described. In FIG. 3, reference numeral 20 denotes a side frame attaching / detaching mechanism.
A connecting plate 22 constituting the connecting portion 21 is provided at the tip of the leg 2 of the vehicle, and a guide groove 23 that opens diagonally upward is provided at the top of the connecting plate 22. Further, a pin hole 24 for inserting the connection pin 13 is formed in a lower portion of the connection plate 22.

Further, two connecting plates 26, 2 constituting the connecting portion 25 of the side frame 7 are provided on both sides of the pin hole 24 and on both sides on the base end side of the connecting plate 22.
6, two stoppers 27, 27 for positioning the side frame 7 by abutting the end portions thereof are fixedly provided.

On the other hand, the guide holes 23 are guided by the pin holes 28, 28 formed at the upper ends of the two connecting plates 26, 26 of the side frame 7, and are engaged with the guide grooves 23. The pin 29 is fitted. Further, the connecting plate 2
The pin holes 24 are aligned with the pin holes 24 at the lower portions of the pins 6 and 26, and the connection pins 13 are inserted therein. Incidentally, the number of the connection plates 26, 26 is not limited to two.

When connecting the side frame 7 to the lower frame 1, the side frame 7 is lifted and then lowered while the lower frame 1 is fixed by appropriate means. 7. After the opening of the guide groove 23 is engaged with the engagement pin 29 of the
3, the engagement pin 29 engages with the inner bottom of the guide groove 23, and the side frame 7 rotates clockwise in FIG. The end portions of the connecting plates 26, 26 of the side frame 7 abut against the stoppers 27, 27, and the side frame 7 is positioned.

In this state, the pin holes 30, 30 of the side frame 7 are aligned with the pin holes 24 of the lower frame 1, and the connection pins 13 can be inserted into the pin holes 30, 30, 24. Accordingly, the side frame 7 is connected to the lower frame 1.

When the side frame 7 is to be removed from the connected state, the lower frame 1 is fixed by appropriate means, and then the side frame 7 is lifted up to a state where no force is applied to the connecting pins 13. When the connecting pin 13 is pulled out and the side frame 7 is further pulled up, the engaging pin 29 is disengaged from the guide groove 23,
The side frame 7 is removed from the lower frame 1.

Thus, the side frame attaching / detaching mechanism 2
In the case of No. 0, the positioning of the connecting portion 21 of the lower frame 1 and the connecting portion 25 of the side frame 7 becomes extremely easy by the guide groove 23 and the stoppers 27, 27, and the work of attaching and detaching the side frame 7 can be performed in a short time. It can be done easily.

In the side frame attaching / detaching mechanism 20, as in the case of the side frame attaching / detaching mechanism 14, if a hydraulic cylinder (not shown) is provided for the connecting pin 13, the connecting pin 13 Can be easily attached and detached. Furthermore,
The stoppers 27, 27 are fixedly provided on both sides of the connecting plate 22 of the lower frame 1. Alternatively, the stoppers 27, 27 may be fixedly provided between the connecting plates 26, 26 of the side frame 7.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0029]

According to the present invention, as described in detail in the above embodiment, the invention according to claim 1 is provided in a side frame attaching / detaching mechanism of a construction machine. A guide groove which opens diagonally downward is provided, and a pin hole for inserting a connection pin is formed in a lower portion of the connection plate. An engaging pin for guiding the guide groove at the upper part and engaging the guide groove is fixedly provided, and is aligned with the pin hole at the lower part of the connecting plate to insert the connecting pin. When a pin hole is opened, and furthermore, when the guide groove is engaged with the engagement pin, a stopper for positioning the rotating side frame is fixed to the side frame or the lower frame. Guide groove and Wrapper by the positioning of the connecting portion of the Lower frame and the connecting portion of the side frame becomes extremely easy, desorption operations of the side frame can be easily performed in a short time.

According to a second aspect of the present invention, in a side frame attaching / detaching mechanism for a construction machine, a guide groove which opens obliquely upward is provided at an upper portion of a connecting plate constituting a connecting portion provided at a leading end of a lower frame. A pin hole for inserting a connecting pin is formed in a lower portion of the connecting plate, and is guided by the guide groove at an upper end of the connecting plate constituting a connecting portion of the side frame and is engaged with the guide groove. And a pin hole for inserting the connection pin is formed in the lower portion of the connection plate so as to fit the connection pin. Since the stopper for positioning the rotating side frame when the mating pin is engaged is fixed to the lower frame or the side frame, the same effect as the effect of the invention according to claim 1 can be expected. , Exactly written An invention which achieves the composed effect.

[Brief description of the drawings]

FIG. 1 is a front view of a side frame attaching / detaching mechanism of a construction machine according to an embodiment of the present invention.

FIGS. 2 (a) to 2 (d) show an embodiment of the first aspect of the present invention, and are explanatory views of a procedure for attaching a side frame by a side frame attaching / detaching mechanism of a construction machine.

FIG. 3 is a front view of a side frame attaching / detaching mechanism of a construction machine according to an embodiment of the present invention.

FIG. 4 shows a conventional example, and is a plan view of a connecting portion between a lower frame and a side frame of a construction machine.

FIG. 5 is a front view of a conventional example, showing a side frame attaching / detaching mechanism of a construction machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower frame 3,15,21,25 Connecting part 4,16,22,26 Connecting plate 6,11,24,30 Pin hole 7 Side frame 13 Connecting pin 14,20 Side frame attaching / detaching mechanism 17,23 Guide groove 18, 27 Stopper 19, 29 Engagement pin

Claims (2)

[Claims] In a side frame attachment / detachment mechanism for a construction machine capable of freely connecting a side frame and a lower frame of the construction machine, a guide that opens diagonally downward at an upper end of a connection plate constituting a connection portion of the side frame. A groove is provided, and a pin hole for inserting a connecting pin is formed in a lower portion of the connecting plate.On the other hand, the guide groove is formed on a connecting plate distal end upper portion constituting a connecting portion provided on the lower frame distal end. An engaging pin for guiding and engaging with the guide groove is fixedly provided, and is aligned with the pin hole at a lower portion of the connecting plate to form a pin hole for inserting the connecting pin. Further, a construction machine is characterized in that a stopper for positioning the rotating side frame when the guide groove is engaged with the engaging pin is fixed to the side frame or the lower frame. Side frame detachable mechanism. 2. A side frame attaching / detaching mechanism for a construction machine which allows a side frame and a lower frame of a construction machine to be freely connected to each other. In addition to the provision of a guide groove which is open at the same time, a pin hole for inserting a connection pin is formed in a lower portion of the connection plate, while the guide groove is formed at an upper end of a connection plate constituting a connection portion of the side frame. An engaging pin for guiding and engaging with the guide groove is fixedly provided, and is aligned with the pin hole at a lower portion of the connecting plate to form a pin hole for inserting the connecting pin. A construction machine, wherein a stopper for positioning the rotating side frame when the engaging pin is engaged with the guide groove is fixed to the lower frame or the side frame. Machine side frame detachable mechanism.