JPH09126224A - Clearance gap adjustment mechanism for turning movement supporting point of pin-connection turning movement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate work at a narrow space in close vicinity to a machine and accomplish work safely, quickly and certainly by providing and collectively fitting a function unit for adjusting a thrust gap at a pin-connection part and a pin securing and locking function unit on a suitable position on one of the ends of the pin. SOLUTION: A pin 6 is inserted through a through hole on traveling frame boss 2a, 2b and a presser plate 5, at which time a pin securing measure is taken by fixing a pin fixing plate 7 with a pin securing plate 7b by welding or the like on the position equalling to end position of the pin 6 head using the width across flat 6a. The pin 6 is locked by a bolt 7e of the fixing plate 7 and clearance gap adjustment is made so that a thrust clearance gap 9 may be in an optimum value by inserting a preferable quantity of shims 12 between the ends of the presser plate 5, the travaling frame boss 2b and a thrust bush 4. Thus working in a narrow space in close vicinity to a machine can be dispensed with and work can be carried out expeditiously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clearance adjusting mechanism for a pivot fulcrum portion of a pin connecting and rotating mechanism, and more particularly to a pivot fulcrum portion of a pin connecting and rotating mechanism for construction machines such as hydraulic excavators and industrial machines. Of the gap adjustment mechanism.

[0002]

2. Description of the Related Art Conventionally, in rocking type construction machines,
At the fulcrum of rotation, a device that prevents the pin from coming off and a device that prevents the pin from rotating and a device that adjusts the clearance are attached to both ends of the support pin. Therefore, in the conventional mechanism, when the rotation fulcrum is attached to the side surface of the machine body, when the boss end surface is worn during use, it is necessary to adjust the clearance or damage occurs, and the parts replacement work is required. When working, the work space was small and it was difficult to do proper work. This will be described with reference to FIGS. 5 to 8, which describes a rocking type construction machine having a rolling function for rocking the vehicle body frame by a pin connection and a hydraulic cylinder between the lower traveling body and the upper vehicle body frame. There is. And the structure is as follows. FIG. 5 shows a structure of a pivot fulcrum of a rocking type construction machine which has been conventionally used. Pin connection and a hydraulic cylinder are provided between a traveling frame 2 at a lower portion of a body and a body frame 11 at an upper portion of the body. 6 shows a side portion of a rocking type construction machine having a rolling function for rocking a vehicle body frame by means of FIG.
FIG. 7 is a perspective view showing the structure of the rotation fulcrum part of the swing type construction machine shown in FIG. 5, and FIG. 7 shows the structure of the rotation fulcrum part of the swing type construction machine shown in FIG. FIG. 8 shows a sectional view taken along the line D-D of FIG. 5, showing the side view in the direction viewed from the side of the cross section of the structure taken along the line C-C. Therefore, referring to FIG. 7, the structure of a rocking type construction machine that has been conventionally used will be described. The rolling frame 3 and the traveling frame 2 that are integrated with the vehicle body frame 11 are rolled on the left and right sides of the body at the center position in the front-rear direction of the body. Cylinder 13, 1
3'are connected, and pivot fulcrums 10 and 10 'are provided in the front and rear of the fuselage at the center position in the lateral direction of the fuselage by pin coupling serving as the center of rotation. Here, since the rotation fulcrums 10, 10 'and the rolling cylinders 13, 13' use the same product at the left and right positions of the machine body, the configuration on the left side of the machine body will be described below. One end of the rolling cylinder 13 on the left side of the machine body is rotatably connected to the traveling frame 2 by 13b of the pin B, and the other end of the rolling cylinder 13 on the left side of the machine body is pin 13 of the pin A.
It is rotatably connected to the rolling frame 3 at a.
Further, as shown in FIG. 5, one rotation fulcrum portion 10, 10 'is attached to each of the front and rear positions of the rolling frame 3 of the machine body. The detailed structure is shown in FIGS. 6 and 8. FIG. 6 shows the connection of the rolling frame 3 to the traveling frame 2 by pin connection at the front rotation fulcrum portion 10 arranged at the front position of the machine body. The traveling frame 2 has two bosses A 2a and a traveling frame boss B which are arranged at a required interval.
2b are mounted concentrically with the pin mounting hole as a reference. Here, the rolling frame 3 is inserted into the rolling frame boss 3a between the traveling frame boss A 2a and the traveling frame boss B 2b, and the pin holes of the rolling frame boss 3a are provided in the traveling frame boss 2a and the traveling frame boss B. 2b is attached concentrically with the pin hole of 2b. Then, as shown in FIG. 8, the traveling frame boss B
2b, the thrust bush 4 is inserted, and the outer end surface of the traveling frame boss B 2b is aligned with the outer end surface of the thrust bush 4. In this state, the pin 8 was inserted into a pin hole which is an inner diameter portion of the traveling frame boss A, the rolling frame boss 3a, and the thrust bush 4, and the retaining pin 14 was axially penetrated from the traveling frame boss A 2a. Insert into the pin hole and fix the position of pin 8. Then, on the 2b side of the traveling frame boss B, the 2 of the traveling frame boss B is
By the outer end surface of b and the outer end surface of the thrust bush 4,
The ring-shaped presser plate 5 is attached while being supported by the pin 8 at its inner diameter portion, and is fixed to the traveling frame boss B 2b via the presser plate 5 by the bolt 5a. At this time, the link-shaped holding plate 5 and the traveling frame boss 2b of the traveling frame boss B are arranged so that the gap between the traveling frame boss A 2a, the traveling frame boss B 2b, the thrust bush 4 and the rolling frame boss 3a becomes a predetermined gap. One or more shims 12 having a desired thickness are selected and inserted between the thrust bush 4 and the thrust bush 4. With the above-described assembly configuration, the rotation prevention and removal prevention of the pin 8 is performed on the rolling frame 3 side, which is the position inside the body of the rotation fulcrum portion, and the clearance adjustment of the rotation fulcrum portion is performed on the rotation fulcrum portion. By carrying out at a position outside the machine body, it is carried out at a position where both ends are separated from the pin 8. Next, the reason why a gap is required at the pivot point is as follows.
As shown in FIGS. 5 and 7, at the lateral position of the machine body, the rolling cylinders 13 and 13 ′ are pin-coupled between the rolling frame 3 and the traveling frame 2, and the pivoting fulcrum is pin-coupled to the center of the machine body in the longitudinal direction of the machine body. There are parts 10, 10 '. Therefore, one rolling cylinder of the rolling cylinders 13 and 13 'is extended and the other rolling cylinder is housed, and the rolling frame is centered around the rotation fulcrum portion at the longitudinal position of the machine body with reference to the longitudinal direction of the machine body. 3 can roll or swing relative to the traveling frame 2 in the left-right direction. Here, the construction machine is generally used for working in a place where the scaffolding is bad and the surface is rough. Since such a scaffolding is bad and work is carried out on an uneven terrain, the ground contact surface of the lower traveling body will be unevenly grounded. Then, the deformation of the traveling frame 2 due to the twist occurs, and the pin 8 of the rotation fulcrum portion due to the pin connection is formed.
And traveling frame boss A 2a and traveling frame boss B 2
b, rolling frame boss 3a, thrust bush 4
Makes strong local contact, which makes it difficult to rotate. Therefore, it is necessary to provide an appropriate gap 9 between the traveling frame boss and the rolling frame boss in order to improve the turning operation and to allow the turning frame operation to be performed smoothly. In addition, it is necessary to create the same gaps at the two rotation fulcrums at the front and rear positions of the machine body.

[0003]

Therefore, in the conventional mechanism, when the turning fulcrum portion is attached to the side surface of the machine body, the pin 8 and the low link frame 3 come close to each other as shown in FIGS. 5 to 8. Therefore, when inserting the retaining pin 14 of the pin 8 and actually using it in the field,
When each part is damaged and it is necessary to adjust the clearance or when parts are replaced due to damage, the work space is small and it is difficult to perform appropriate work. It is an object of the present invention to solve the problem.

[0004]

SUMMARY OF THE INVENTION The present invention provides a pin connecting portion of a pin connecting / rotating mechanism, which has a function of adjusting a thrust clearance and a function of preventing a pin from coming off and turning. Both are provided at appropriate positions on the one end side of the pin, and by gathering and attaching to the one end side of the pin,
A gap adjusting mechanism of a pivot fulcrum part of a pin connecting / rotating mechanism, which is capable of adjusting the thrust gap and preventing the pin from coming off and turning only on one end side of the pin.

[0005]

Next, the operation of the clearance adjusting mechanism for the pivotal fulcrum of the pin coupling pivoting mechanism according to the present invention will be described. Therefore,
The operation of the function of preventing the pin 6 of the front rotation fulcrum portion 1 from coming off and preventing rotation will be described. 2 of running frame boss A
a, the traveling frame boss B 2b, the shim 12 and the inner diameter pin hole portion of the pressing plate 5 are adjusted to be concentric with each other, and the head flat width portion 6a of the pin 6 is inserted into the pin hole outside the machine body. The pin fixing plate 7 of the concave double-sided width portion 7a is fitted according to the shape of the convex double-sided head portion 6a. Next, the fixing plate 7 is rotated to align the bolt hole 7f of the pin fixing plate 7 with the screw hole 2c of the traveling frame boss B 2b and the bolt hole 7c and the screw hole 2d. Therefore, the pin 6 is restrained at the width across flats and is prevented from rotating by the bolt 7e of the pin fixing plate 7. Further, the pin retaining plate 7b of the pin fixing plate 7 restrains the head of the pin 6 to prevent the pin 6 from coming off. Then, as shown in FIG. 4, the gap adjustment is performed from the outside of the machine body by using the shim 1 between the pressing plate 5, the traveling frame boss B 2b and the end surface of the thrust bush 4.
By inserting 2, the position of the thrust bushing 4 and the rolling frame 3a is moved in the thrust direction between the traveling frame boss A 2a and the traveling frame boss B 2b. This clearance adjusting operation can be performed from the outside of the machine body of the rotation fulcrum portion at the same position as the operation of preventing the pin 6 from coming off and turning at the rotation fulcrum portion of the pin coupling rotation mechanism. Further, as described above, the operation for preventing the pin 6 at the pivotal fulcrum from slipping out and the rotation and the clearance adjusting operation do not have restrictions on the surrounding space, and the clearance adjusting work can be performed freely.

[0006]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a side portion of a swing-type construction machine having a rolling function for swinging the vehicle body frame by a pin connection and a hydraulic cylinder between a traveling frame 2 below the vehicle body and a vehicle body frame 11 above the vehicle body. Shows a perspective view of the structure of the pivoting fulcrum of the rocking type construction machine.
1 is a cross-section taken along the line AA of FIG. 1 and a side view is shown in the direction seen from the side of the cross section, and FIG. 4 is a cross-sectional view taken along the line BB of FIG. Therefore, first, the basic structure of the rotation fulcrum portion of the rocking type construction machine of the present invention will be described. The mounting structure of the rotation fulcrums 1, 1'arranged before and after the vehicle body at the center position in the vehicle body left-right direction shown in FIG. 1 will be described, and the rolling cylinders 13, 13 arranged at the lateral position of the vehicle body shown in FIG. The mounting configuration of 'is explained. Between the undercarriage and the upper body frame, a pin adjustment and a mechanism for rolling the swinging body frame by a hydraulic cylinder. The structure of the clearance adjusting mechanism at the turning fulcrum of the machine is as follows. Running frame 2 at the bottom of the machine
The structure of the clearance adjustment mechanism of the pivoting fulcrum of the rocking type construction machine having the rolling function of rocking the body frame with the pin connection and the hydraulic cylinder between the body frame 11 on the upper side of the body and the body frame 11 will be described. A rolling frame 3 and a traveling frame 2 integrated with a body frame 11 are rolled cylinders 13 and 13 'on the left and right sides of the machine body at a central position in the direction.
Connect with. Since the structure of the rocking type construction machine body is bilaterally symmetrical, the structure on the left side of the machine body will be described below. The rolling cylinder 13 on the left side of the machine has one end of the pin B
3b is rotatably connected to the traveling frame 2, and the other end of the rolling cylinder 13 on the left side of the machine body is rotatably connected to the rolling frame 3 by a pin 13a. 2 shows the connection of the rolling frame 3 to the traveling frame 2 by pin connection. Two bosses A are arranged on the traveling frame 2 with a required space.
2a and the traveling frame boss B 2b are mounted concentrically with respect to the pin mounting holes. Here, the rolling frame 3 is inserted into the rolling frame boss 3a between the traveling frame boss A 2a and the traveling frame boss B 2b, and the pin holes of the rolling frame boss 3a are provided in the traveling frame boss 2a and the traveling frame boss B. 2b is attached concentrically with the pin hole of 2b. Then, as shown in FIG. 4, the thrust bush 4 is inserted into the traveling frame boss B 2b so that the outer end surface of the traveling frame boss B 2b and the outer end surface of the thrust bush 4 are aligned with each other. And
A bolt 7 is fastened to the traveling frame boss 2b of the traveling frame boss B through the retaining plate 5 with a shim 12 interposed between the traveling frame boss B 2b and the retaining plate 5. The head of the pin 6 is inserted into the through holes formed in the traveling frame boss A 2a, the traveling frame boss B 2b, and the holding plate 5 with the head of the pin 6 outside the machine body. The width is formed, and the pin retaining plate 7b is fixed to the pin fixing plate 7 at the position corresponding to the end face position of the head of the pin 6 by welding or the like by the width across flats 6a of the head. Preventive measures have been taken to prevent slipping. here,
The pin fixing plate 7 is attached to the traveling frame boss B 2b with bolts 7d and 7e. here,
2a of traveling frame boss A and 2b of traveling frame boss B
Between the thrust plate 4, the traveling frame boss A 2a, the traveling frame boss B 2b, and the rolling frame boss 3a so that the thrust gap 9 formed between the rolling bush boss 3 and the rolling frame boss 3a has an optimum value. By inserting a desired amount of shim 12 between the end face of 2b and the thrust bush 4, it is possible to perform a gap adjusting operation so that the thrust gap 9 becomes an optimum value, and the pin 6 of the pivot fulcrum portion of the pin connecting / rotating mechanism can be adjusted. The body frame can be mounted between the running frame 2 at the lower part of the machine body and the body frame 11 at the upper part of the machine body by the pin connection and the hydraulic cylinder, which can be carried out from the outer side of the machine body at the turning fulcrum part at the same position as the retaining and turning operations. It is a gap adjusting mechanism of a swinging fulcrum part of a rocking type construction machine having a rolling function of rocking.

[0007]

[Effect] Next, the gap adjusting mechanism of the pivot fulcrum portion of the pin connecting and rotating mechanism of the present invention is the pin connecting portion of the pin connecting and rotating mechanism.
By providing both the component having the function of adjusting the thrust gap and the component having the function of preventing the pin from coming off and turning around at appropriate positions on the one end side of the pin, and gathering and attaching it to the one end side of the pin, The clearance adjustment mechanism of the rotation fulcrum part of the pin connection rotation mechanism is characterized in that the thrust clearance can be adjusted and the pin can be prevented from coming off and turning only at one end side of the pin. In the department
Both the component that has the function of adjusting the thrust clearance and the component that has the function of preventing the pin from coming off and turning are provided at appropriate positions on one end side of the pin, so it is necessary to work in a narrow space close to the machine body. There is no effect, and there is an effect that you can work safely, quickly, and surely. Further, since the clearance adjusting mechanism of the rotation fulcrum portion of the pin connecting and rotating mechanism is assembled and attached to one end side of the pin, there is an effect that the work necessary for the clearance adjustment can be performed. Therefore, there is an effect that the thrust clearance can be adjusted, and the pin can be prevented from coming off and turning only on one end side of the pin.

[Brief description of the drawings]

FIG. 1 is a side view of an oscillating type construction machine having a rolling function provided with a clearance adjusting mechanism of a pivot fulcrum portion of a pin coupling pivot mechanism of the present invention.

FIG. 2 is a perspective view of a pivot fulcrum portion of the pin coupling / rotating mechanism, which is a main part of a gap adjusting mechanism of the pivot fulcrum portion of the pin coupling / rotating mechanism of the present invention.

FIG. 3 is a side view of a cross section taken along the line AA of FIG. 1 viewed from the side of the cross section.

FIG. 4 is a cross-sectional view taken along the line BB in FIG.

FIG. 5 is a side view of a rocking type construction machine which has been conventionally used.

FIG. 6 is a perspective view of a pivot fulcrum portion of a pin coupling / rotating mechanism that is a main part of a gap adjusting mechanism of a pivot fulcrum portion of a pin coupling / rotating mechanism of a swing-type construction machine that has been conventionally used. .

7 is a side view of a cross section taken along the line CC of FIG. 5 as seen from the side of the cross section.

8 is a cross-sectional view of FIG. 5 taken along the line D-D.

[Explanation of symbols]

1 Front rotation fulcrum 1'Rear rotation fulcrum 2 Travel frame 2a Travel frame boss A 2b Travel frame boss B 3 Rolling frame 3a Rolling frame boss 4 Thrust bushing shim 5 Presser plate 6 Pin 6a Head width across flats 7 pin fixing plate 7a concave width across flats 7b pin retaining fixing plate 7c bolt hole 7d bolt 7e bolt 7f bolt hole 8 pin 9 thrust gap 10 front rotation fulcrum part 10 'rear rotation fulcrum part 11 vehicle body frame 12 shim 13 Left side rolling cylinder 14 Locking pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Hamada 7-14 Wadamiyadori, Hyogo-ku, Kobe-shi, Hyogo Nishiryo Engineering Co., Ltd.

Claims (1)

[Claims] Claim: What is claimed is: 1. A pin connecting portion of a pin connecting / rotating mechanism, which comprises a component having a function of adjusting a thrust gap and a component having a function of preventing a pin from coming off and a whirl.
A pin connection characterized by being provided at an appropriate position on one end side of the pin, and being assembled and attached to one end side of the pin so that the thrust clearance can be adjusted and the pin can be prevented from coming off and turning only on the one end side of the pin. A clearance adjustment mechanism for the rotation fulcrum of the rotation mechanism.