JP3072589B2 - Bearing equipment for construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device for construction equipment, and more particularly to a method for receiving a load in both a radial direction and a thrust direction applied to a pin joint of a front linkage such as a hydraulic shovel or a wheel loader. It relates to a suitable bearing device.

[0002]

2. Description of the Related Art Conventionally, a bearing device such as a pivot joint used for a link mechanism of a construction machine such as a hydraulic excavator or a wheel loader receives loads from both a radial direction and a thrust direction. Special measures and considerations are required for the configuration of the bearing device suitable for the above. Therefore, the technology developed is disclosed in Japanese Patent Application Laid-Open No. Hei 4-502.
No. 805. The invention described in that patent publication is directed to a bearing device suitable for receiving a load even when a load is applied in both a radial direction and a thrust direction, and transmitting a load in the thrust direction between its structural members. For example, in Japanese Patent Application Laid-Open Publication No. 4-502805, transmission of a load in the thrust direction between the structural members in a pin joint between the structural members is performed to one of the pin receiving portions of the plurality of structural members. The pin is mounted and fixed by press-fitting the pin, and provided around the pin.The pin is press-fitted into the bracket through the sleeve bearing that supports the pin and thrust rings provided on both sides of the sleeve bearing. Received by the end collar, and the end collar and the sleeve bearing both serve as pin bearings. The thrust received by the end collar is transmitted from the end collar to the structural member of the other structure forming one end at the bracket portion, and the load in the thrust direction is transmitted, and conversely, the thrust of the other structure is transmitted. The force is transmitted from the end collar loosely fitted to the structural member to the pin pressed into the end collar, and the force is transmitted from the pin in the order of the holding plate fixed to the pin with bolts. Since the load in the thrust direction is transmitted by the frictional force related to (1), the following problem may occur. If an excessive load that exceeds the frictional force related to the tightening force of the press-fit portion acts, the press-fit portion may come off. Then, due to the configuration, it is difficult to increase the cross-sectional area of the thrust ring, and the thrust surface of the contact surface between the thrust ring, the sleeve bearing, and the end collar may be excessively large.

[0003]

SUMMARY OF THE INVENTION Therefore, the above problems are prevented from occurring, and a pin joint of a hydraulic shovel subjected to a large thrust load such as turning or impact which causes the problems is improved. Measuring is the problem to be solved by the present invention.

[0004]

According to the present invention, a first member 1 is provided.
And the end of the second member 2 are connected to each other, and the other member is pivotally connected to one of the members so that the other member can be pivoted. 5 and the end collars 4 on both sides of the pin 6
And a lubricant such as oil or grease leaking from the sleeve bearing 5 and the end collar 4 can be sealed by the annular sealing material 12 and the sleeve bearing 5 and / or the end collar 4 can be sealed.
A push plate 14 for extruding a rotary sealing material and a push bar 15 are provided on the push plate 14, and the push bar 15 is attached to the end plate 1.
0 is a bearing device of a construction machine supported by zero.

[0005]

According to the present invention, the end of the first member 1 and the second member 2
And the other member is pivotally connected to one of the members so that the other member can be pivoted. The sleeve bearing 5 serving as a bearing for the pin 6 and the end collars 4 on both sides thereof are connected to each other. The peripheral surface of the pin 6 can be supported, and a lubricant such as oil or grease leaked from the sleeve bearing 5 and the end collar 4 can be reliably sealed by the annular sealing material 12. Since the sleeve bearing 5 and / or the end collar 4 is provided with a collar, the conventional sleeve bearing and the end collar, which have transmitted a thrust load by press-fitting into a structure, are improved to be improved through the collar. The value of the thrust load that can be borne by the transmission may increase. Also, in the configuration of the present invention, the thrust load transmission area between the sleeve bearing and the end collar is easier to expand than in the prior art, and therefore, it is possible to reduce the surface pressure due to the expanded thrust load transmission area. Yes, it can reduce friction. And
When the sliding seal is worn, the sealing performance of the sliding seal can be restored by inserting a spacer between the holding plate and the push rod 15. In a bearing device such as a pivot joint used for a link mechanism of a construction machine such as a hydraulic shovel or a wheel loader of the present invention, a push plate 14 for pushing out a rotary seal material and a push bar 15 are provided on the push plate 14, Since the push rod 15 is supported by the end plate 10, the sliding seal and the support of the sliding seal can be pressed by the push plate 14 at the tip of the push rod 15 to secure a sealed state.

[0006]

Embodiment 1 According to the present invention, an opening for inserting a pin 6 is provided at an end of a first member 1 such as an arm member, and the pin 6 is inserted into the opening. The end member 4 is fitted into each of the two end openings provided in the bracket 3 provided at the end of the second member 2 so that the end member 4 can be turned. 4, the pin 6 is inserted into a through hole formed by the end collars 4 on both sides of the sleeve bearing 5, and the pin 6 is used as a rotation center, and the second member 2 And a flange portion 7 is provided at both ends of the sleeve bearing 5 and provided at an end of the first member 1 such as the arm member so as to be sandwiched between the flange portions 7. Forming part 8;
A through hole 9 is formed in the centerpiece structure portion 8 from the outside toward the inside, and a lubricant such as oil or grease poured into the through hole 9 is used to form an end of the first member 1 such as the arm member. It flows into the peripheral surface of the pin inserted into the opening provided in the housing, and allows lubrication, and is fixed to both ends of the pin 6 so that the end collars 4 on both sides of the sleeve bearing 5 do not come out. The end plates 10 hold the outer end surfaces of the end collars 4 on both sides of the sleeve bearing 5,
An annular recessed portion 11 is formed on the side of the end collar 4 opposed to both sides of the sleeve bearing 5, and an annular sealing material 12 and a back surface of the annular sealing material 12 supported inside the annular recessed portion 11. Positioning the seal material support member 13, the annular seal material support member 13, and the annular push plate 14 capable of supporting the back surface of the annular seal material 12,
A push rod 15 is formed on the annular push plate 14, and the push rod 15
Through the through hole 16 formed in the axial direction of the pin 6 for inserting the push rod 15, the tip of the push rod 15 is received by the inner surface of the portion where the external opening of the through hole 16 is closed, and the second An O-ring 17 is interposed between the outer surface of the bracket 3 provided at the end of the member 2, the outer surface of the end collar 4, and the end plate 10 fixed to both ends of the pin 6. A bearing device for a construction machine, wherein an O-ring 18 is interposed between a pin 6, the end collar 4, and an end plate 10 fixed to both ends of the pin 6.

[0007]

According to the present invention, the end of the first member 1 and the second member 2
And the other member is pivotally connected to one of the members so that the other member can be pivoted. The sleeve bearing 5 serving as a bearing for the pin 6 and the end collars 4 on both sides thereof are connected to each other. The peripheral surface of the pin 6 can be supported, and a lubricant such as oil or grease leaked from the sleeve bearing 5 and the end collar 4 can be sealed by an annular sealing material 12 and the sleeve bearing 5 and / or the end collar 4 can be sealed. A push plate 14 for extruding a rotary sealing material and a push rod 15
And a push rod 15 supported by an end plate 10 for a construction machine, wherein an end of a first member 1 and an end of a second member 2 are connected to each other to form one of the members. And the other member can be pivoted so as to be pivotable, and the peripheral surface of the pin 6 can be supported by a sleeve bearing 5 serving as a bearing of the pin 6 and the end collars 4 on both sides thereof. Lubricant such as oil or grease leaking from the sleeve bearing 5 and the end collar 4 is sealed with an annular sealing material 12.
Thus, there is an effect that the sealing can be performed more reliably. Since the sleeve bearing 5 and / or the end collar 4 is provided with a collar, the conventional sleeve bearing and the end collar, which have transmitted a thrust load by press-fitting into a structure, are improved to be improved through the collar. There is an effect that the value of the thrust load that can be borne by the transmission can be increased.
Also, in the configuration of the present invention, the thrust load transmission area between the sleeve bearing and the end collar is easier to expand than in the prior art, and therefore, it is possible to reduce the surface pressure due to the expanded thrust load transmission area. This has the effect of reducing friction. Then, when the sliding seal is worn, by inserting a spacer between the push plate 14 and the push rod 15, there is an effect that the sealing property of the sliding seal portion can be restored. In a bearing device such as a pivot joint used for a link mechanism of a construction machine such as a hydraulic shovel or a wheel loader of the present invention, a push plate 14 for pushing out a rotary seal material and a push bar 15 are provided on the push plate 14, Since the push rod 15 is supported by the end plate 10, there is an effect that the sliding seal and the support of the sliding seal are pressed by the push plate 14 at the tip of the push rod 15 to secure the sealing state.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a bearing device for a pin joint of a construction machine according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part of an end collar of a bearing device for a pin joint of a construction machine according to the present invention shown in FIG. 1;

3 is a perspective view of a structure of a push plate and a push bar that presses a seal material inserted into a recess of an end collar of a main part of the pin joint bearing device according to the present invention illustrated in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 1st member 2 2nd member 3 Bracket 4 End collar 5 Sleeve bearing 6 Pin 7 Flange part 8 Eyeball structure part 9 Through hole 10 End plate 11 Annular concave part on end collar side 12 Annular sealing material 13 Annular sealing material support member 14 Push plate 15 Push rod 16 Through hole 17 O-ring 18 O-ring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16C 11/00-11/10

Claims (3)

(57) [Claims] 1. An end of a first member 1 and an end of a second member 2 are connected to each other, and a pin is connected to one of the members so that the other member can be pivoted. The peripheral surface of the pin 6 is supported by a sleeve bearing 5 serving as a bearing of the coupled pin 6 and end collars 4 on both sides thereof.
A lubricant such as oil or grease leaked from the sleeve bearing 5 and the end collar 4 can be sealed by an annular sealing material 12, and the sleeve bearing 5 and / or
Alternatively, a bearing device for a construction machine in which a collar portion is provided on the end collar 4, a push plate 14 for pushing out a rotary sealing material, a push bar 15 is provided on the push plate 14, and the push bar 15 is supported by the end plate 10. 2. An end of the first member 1 and an end of the second member 2 are connected to each other, and a pin is connected to one of the members so that the other member can be turned. The peripheral surface of the pin 6 is supported by a sleeve bearing 5 serving as a bearing of the coupled pin 6 and end collars 4 on both sides thereof.
A lubricant such as oil or grease leaking from the sleeve bearing 5 and the end collar 4 can be sealed by an annular sealing material 12 and an annular recess 1 is provided on the end collar 4 side.
1, an annular seal member 12 and an annular seal member support member 13 supporting the rear surface of the annular seal member 12 inside the annular concave portion 11, and an annular seal member support member 13 and a rear surface of the annular seal member 12. And a push bar 15 formed on the annular push plate 14, and behind a through hole formed in the axial direction of the pin 6 for inserting the push bar 15. A bearing device for a construction machine in which the above-mentioned portion is pressed by the end plate 10 and the push rod 15 is supported by the end plate 10. 3. An opening for inserting a pin 6 is provided at an end of the first member 1, and the pin 6 is inserted into the opening.
Can be turned around the center of rotation of the second member 2, which is a member that can be turned. The end collars 4 are respectively provided at both end openings provided in the bracket 3 provided at the end of the second member 2. The sleeve bearing 5 is positioned between the end collars 4 and
The pin 6 is inserted into a through hole formed by the end collars 4 on both sides of the second member 2, the pin 6 is used as a center of rotation, the second member 2 is pivotally supported, and provided at an end of the first member 1. Forming a through-hole 9 from the outside toward the inside of the center-of-eye structure portion 8, and lubricating material such as oil or grease poured into the through-hole 9 is used for the arm member or the like. First member 1
Flows into the peripheral surface of the pin inserted into the opening provided at the end of the sleeve bearing, enables lubrication, and prevents the end collars 4 on both sides of the sleeve bearing 5 from slipping out.
End plates 10 fixed to both ends of the pin 6 respectively hold the outer end surfaces of the end collars 4 on both sides of the sleeve bearing 5, and are formed on the side of the end collars 4 facing the both sides of the sleeve bearing 5. Depression 1
1 and an annular sealing material 1 is formed inside the annular recess 11.
2, an annular sealing material supporting member 13 supporting the back surface of the annular sealing material 12, and an annular pressing plate 1 capable of supporting the annular sealing material supporting member 13 and the back surface of the annular sealing material 12.
4, a push rod 15 is formed on the annular push plate 14, and the push rod 15 is inserted through a through hole 16 formed in the axial direction of the pin 6 for inserting the push rod 15, and an external opening of the through hole 16 is formed. The distal end of the push rod 15 is received by the inner surface of the part with the part closed, and the outer surface of the bracket 3 provided at the end of the second member 2, the outer surface of the end collar 4, and the pin 6 An O-ring 17 is interposed between the end plate 10 and the end plate 10 fixed to both ends of the pin 6, and an O-ring 18 is interposed between the pin 6, the end collar 4, and the end plate 10 fixed to both ends of the pin 6. Bearing device for construction machinery characterized by interposition.