JPH0354845U - - Google Patents
Info
- Publication number
- JPH0354845U JPH0354845U JP11694789U JP11694789U JPH0354845U JP H0354845 U JPH0354845 U JP H0354845U JP 11694789 U JP11694789 U JP 11694789U JP 11694789 U JP11694789 U JP 11694789U JP H0354845 U JPH0354845 U JP H0354845U
- Authority
- JP
- Japan
- Prior art keywords
- grease injection
- path
- injection path
- valve seat
- ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004519 grease Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 230000002265 prevention Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 3
- 238000010276 construction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Shovels (AREA)
Description
第１図は、本考案に係る軸受ガタ防止構造を具
備するバツクホーの側面図。第２図は、同要部の
断面背面図。第３図は、従来の軸受構造の断面説
明図。
Ａ……バツクホー、１７……枢支ピン、２０…
…ボス、２１，２２……ブラケツト、２５……グ
リース注入路、２６……リリーフ弁、２７……ピ
ストン、２８……グリース注入分岐路、２９……
チエツク弁。
FIG. 1 is a side view of a backhoe equipped with a bearing rattling prevention structure according to the present invention. FIG. 2 is a cross-sectional rear view of the main parts. FIG. 3 is a cross-sectional explanatory diagram of a conventional bearing structure. A... Batsukuho, 17... Pivot pin, 20...
... Boss, 21, 22 ... Bracket, 25 ... Grease injection path, 26 ... Relief valve, 27 ... Piston, 28 ... Grease injection branch path, 29 ...
Check valve.
Claims (1)
０を枢支ピン１７により回動自在に連結し、同枢
支ピン１７の内部に一側端面より中央部周面まで
グリース注入路２５を形成して、同注入路２５中
を通して枢支ピン１７の外周面とボス２０の内周
面との間にグリースを供給可能とし、 かつ、グリース注入路２５の中途部には、同注
入路２５の内圧を一定にするためのリリーフ弁２
６を設け、また、グリース注入路始端側には、枢
支ピン１７の外周面と、一側のブラケツト２１の
内側面に形成したシリンダ部２３ａの内周面との
間に、水密状態で軸線方向に摺動するピストン２
７を設け、 グリース注入路２５の中途部よりピストン２７
の背面側に位置する枢支ピン１７の周面に向けて
グリース注入分岐路２８を形成して、同分岐路２
８中を通してシリンダ部２３ａ内にグリースを供
給可能とし、 かつ、グリース注入分岐路２８中には、同分岐
路２８の内圧を一定にするためのチエツク弁２９
を設けたことを特徴とする建設機械の軸受ガタ防
止構造。 ２ 請求項１記載のリリーフ弁２６を、グリース
注入路２５の中途部に形成した弁座２６ａと、同
弁座２６ａに接離自在のボール２６ｂと、同ボー
ル２６ｂを弁座２６ａに押圧・接触させるスプリ
ング２６ｃと、スプリング受け体２６ｄとから構
成する一方、 請求項１記載のチエツク弁２９を、グリース注
入分岐路２８の中途部に形成した弁座２９ａと、
同弁座２９ａに接離自在のボール２９ｂと、同ボ
ール２９ｂを弁座２９ａに押圧・接触させるスプ
リング２９ｃと、スプリング受け体２９ｄとから
構成すると共に、 リリーフ弁２６のスプリング２６ｃの押圧力よ
りもチエツク弁２９のスプリング２９ｃの押圧力
を大きくしたことを特徴とする建設機械の軸受ガ
タ防止構造。[Scope of claims for utility model registration] 1. A boss 2 between a pair of left and right brackets 21 and 22
0 are rotatably connected by a pivot pin 17, and a grease injection path 25 is formed inside the pivot pin 17 from one end surface to the central peripheral surface, and the grease injection path 25 is passed through the grease injection path 25. Grease can be supplied between the outer peripheral surface of the boss 20 and the inner peripheral surface of the boss 20, and a relief valve 2 is provided in the middle of the grease injection path 25 to keep the internal pressure of the grease injection path 25 constant.
6 is provided, and on the starting end side of the grease injection path, an axial line is provided between the outer circumferential surface of the pivot pin 17 and the inner circumferential surface of the cylinder portion 23a formed on the inner surface of the bracket 21 on one side in a watertight state. Piston 2 sliding in the direction
7 is provided, and the piston 27 is inserted from the middle part of the grease injection path 25.
A grease injection branch path 28 is formed toward the circumferential surface of the pivot pin 17 located on the back side of the branch path 2.
A check valve 29 is provided in the grease injection branch passage 28 to keep the internal pressure of the branch passage 28 constant.
A construction machine bearing rattling prevention structure characterized by having the following features: 2. The relief valve 26 according to claim 1 includes a valve seat 26a formed in the middle of the grease injection path 25, a ball 26b that can freely approach and separate from the valve seat 26a, and the ball 26b pressed against and in contact with the valve seat 26a. a valve seat 29a in which the check valve 29 according to claim 1 is formed in the middle of the grease injection branch path 28;
It is composed of a ball 29b that can freely move toward and away from the valve seat 29a, a spring 29c that presses and contacts the ball 29b with the valve seat 29a, and a spring receiver 29d, and is larger than the pressing force of the spring 26c of the relief valve 26. A construction machine bearing rattling prevention structure characterized by increasing the pressing force of a spring 29c of a check valve 29.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11694789U JPH0750424Y2 (en) | 1989-10-03 | 1989-10-03 | Bearing play prevention structure for construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11694789U JPH0750424Y2 (en) | 1989-10-03 | 1989-10-03 | Bearing play prevention structure for construction machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0354845U true JPH0354845U (en) | 1991-05-27 |
| JPH0750424Y2 JPH0750424Y2 (en) | 1995-11-15 |
Family
ID=31665200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11694789U Expired - Lifetime JPH0750424Y2 (en) | 1989-10-03 | 1989-10-03 | Bearing play prevention structure for construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0750424Y2 (en) |
-
1989
- 1989-10-03 JP JP11694789U patent/JPH0750424Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0750424Y2 (en) | 1995-11-15 |