JPH11300651A - Hydraulic breaker - Google Patents
Hydraulic breakerInfo
- Publication number
- JPH11300651A JPH11300651A JP10104584A JP10458498A JPH11300651A JP H11300651 A JPH11300651 A JP H11300651A JP 10104584 A JP10104584 A JP 10104584A JP 10458498 A JP10458498 A JP 10458498A JP H11300651 A JPH11300651 A JP H11300651A
- Authority
- JP
- Japan
- Prior art keywords
- chisel
- breaker
- bellows
- tip
- hydraulic
- 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.)
- Pending
Links
Landscapes
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、油圧ブレーカに関
し、特に、トンネル工事などの粉塵の多い現場で油圧ブ
レーカ作業を行う場合の油圧ブレーカについてのもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic breaker, and more particularly to a hydraulic breaker for performing a hydraulic breaker operation in a dusty site such as tunnel construction.
【０００２】[0002]
【従来の技術】トンネル工事などの粉塵の多い現場で油
圧ブレーカ作業を行う場合、粉塵が油圧ブレーカ内に浸
入し、油圧ショベルの作動油に異物が混入しないよう
に、一般にトンネル専用油圧ブレーカが使用される。ト
ンネル専用油圧ブレーカとしては、図４に示すようなも
のがある。2. Description of the Related Art When performing a hydraulic breaker operation in a dusty site such as a tunnel construction, a hydraulic breaker exclusively for a tunnel is generally used so that dust does not enter the hydraulic breaker and foreign matter is mixed into hydraulic excavator hydraulic oil. Is done. FIG. 4 shows an example of a hydraulic breaker dedicated to a tunnel.
【０００３】このトンネル専用油圧ブレーカは、ブレー
カ下部１０１に摺動自在に収容され、先端部をブレーカ
下部１０１から突出させたチゼル１０２と、シリンダ１
０３に摺動自在に収容され、油圧の切り換えにより上下
動して、前記チゼル１０２を打撃する打撃ピストン１０
４を備えている。ブレーカ下部１０１にはストッパーブ
ッシュ１１３と摩耗ブッシュ１１４とを内嵌め固定し、
このストッパーブッシュ１１３および摩耗ブッシュ１１
４にチゼル１０２を摺動自在に収容する。チゼル１０２
にはブレーカ下部１０１より先端側の摩耗ブッシュ１１
４寄りに鍔１１５を突設する。[0003] The hydraulic breaker dedicated to the tunnel is slidably housed in a lower portion 101 of the breaker, and a chisel 102 having a tip protruding from the lower portion 101 of the breaker and a cylinder 1.
03, which is slidably housed in the piston 103 and which moves up and down by switching the hydraulic pressure to strike the chisel 102.
4 is provided. A stopper bush 113 and a wear bush 114 are internally fitted and fixed to the breaker lower portion 101,
The stopper bush 113 and the wear bush 11
4, the chisel 102 is slidably housed. Chisel 102
The wear bush 11 on the tip side of the lower part 101 of the breaker
A flange 115 protrudes toward the fourth side.
【０００４】シリンダ１０３にはその下端部に円筒状の
シリンダブッシュ１１５を内嵌め固定し、さらにシリン
ダ１０３の上端寄りにも円筒状のパッキンブッシュ１１
６を固定する。打撃ピストン１０４は前記シリンダブッ
シュ１１５，パッキンブッシュ１１６およびシリンダ１
０３の内面と摺動自在に設け、上下動する打撃ピストン
１０４の下端面によりチゼル１０２の上端面を打撃可能
とする。符号１１７はシリンダ１０３に取付けたコント
ロールバルブであり、このコントロールバルブ１１７に
より油圧を切り換え打撃ピストン１０４を上下動させ、
チゼル１０２の上端面を打撃させる。打撃ピストン１０
４の下端面部分とチゼル１０２の上端面部分が位置する
箇所は打撃室１１８である。符号１３１はシリンダカバ
ー、符号１３２はピストンガス室である。[0004] A cylindrical cylinder bush 115 is fitted and fixed to the lower end of the cylinder 103, and a cylindrical packing bush 11 is also provided near the upper end of the cylinder 103.
6 is fixed. The impact piston 104 includes the cylinder bush 115, the packing bush 116, and the cylinder 1
The lower end surface of a striking piston 104 that moves up and down allows the upper end surface of the chisel 102 to be hit. Reference numeral 117 denotes a control valve attached to the cylinder 103. The control valve 117 switches hydraulic pressure to move the striking piston 104 up and down.
The upper end face of the chisel 102 is hit. Impact piston 10
The location where the lower end surface of the chisel 4 and the upper end surface of the chisel 102 are located is a striking chamber 118. Reference numeral 131 denotes a cylinder cover, and reference numeral 132 denotes a piston gas chamber.
【０００５】上記のような油圧ブレーカにおいて、チゼ
ル１０２の摺動部より粉塵が入らないようにするため、
トンネル専用油圧ショベルでは次の改良がなされてい
る。 （１）チゼル１０２の長手方向の中央部に鍔１１９を設
け、チゼル１０２の鍔１１９とブッシュ１１４との間で
パッキン１２１をチゼル１０２に外嵌めして設ける。In the above-described hydraulic breaker, in order to prevent dust from entering the sliding portion of the chisel 102,
The following improvements have been made in the hydraulic excavator for tunnels. (1) A flange 119 is provided at a central portion in the longitudinal direction of the chisel 102, and a packing 121 is provided between the flange 119 of the chisel 102 and the bush 114 by being externally fitted to the chisel 102.
【０００６】（２）打撃室１１８にエアー供給口１２２
を設け、エアー供給口１２２から打撃室１１８に圧縮空
気を供給することにより、チゼル１０２のストッパーブ
ッシュ１１３および摩耗ブッシュ１１４との摺動部に圧
縮空気を供給してチゼル１０２の摺動部をエアーブロー
する。 （３）打撃ピストン１０４のシリンダブッシュ１１５と
の摺動部にダストシール１２３を二重に設ける。(2) The air supply port 122 is provided in the impact chamber 118.
The compressed air is supplied from the air supply port 122 to the striking chamber 118, so that compressed air is supplied to the sliding portion of the chisel 102 with the stopper bush 113 and the wear bush 114, and the sliding portion of the chisel 102 is aired. To blow. (3) A double dust seal 123 is provided on the sliding portion of the impact piston 104 with the cylinder bush 115.
【０００７】この他、油圧ブレーカで防塵を果たすもの
として、実公平４−２２９３９号公報、実用新案登録第
３０１０６５６号公報および特開平９−５７６５３号公
報がある。In addition, Japanese Utility Model Publication No. 4-22939, Japanese Utility Model Registration No. 3010656, and Japanese Patent Application Laid-Open No. 9-57653 have disclosed hydraulic dust breakers.
【０００８】[0008]
【発明が解決しようとする課題】トンネル工事の作業で
天井の岩盤を破砕するため、チゼルを上向きにして作業
したり、粉塵の舞い上がるのを抑制するため、チゼルに
放水しながら作業することがある。その場合、チゼル１
０２に鍔１１９、ブレーカ下部下端にパッキン１２１を
設け、チゼル１０２の摺動部をエアーブローするにもか
かわらず、破砕した岩石の粉や泥水が、チゼル１０２を
伝わって打撃室１１８に浸入し、さらに異物が打撃ピス
トン１０４の摺動部の二重のダストシール１２３を通り
越えて、油圧ショベルの作動油に混入することがある。In tunnel construction work, work may be performed with the chisel facing upward in order to crush the bedrock of the ceiling, or while discharging water to the chisel in order to prevent dust from rising. . In that case, Chisel 1
02, a flange 119 and a packing 121 at the lower end of the breaker are provided, and crushed rock powder or muddy water penetrates through the chisel 102 into the striking chamber 118 despite air blowing of the sliding portion of the chisel 102, Further, foreign matter may pass through the double dust seal 123 on the sliding portion of the striking piston 104 and mix into the hydraulic oil of the hydraulic shovel.
【０００９】作動油に異物が混入すると、油圧ブレーカ
や油圧ショベルのポンプ、その他の油圧により作動する
機器を損傷させる原因となる。[0009] If foreign matter is mixed into the hydraulic oil, it may cause damage to a hydraulic breaker, a pump of a hydraulic shovel, and other devices operated by hydraulic pressure.
【００１０】[0010]
【課題を解決するための手段】そこで、本発明は、上記
の事情に鑑み、粉塵、岩石の粉、泥水の多い作業現場
で、油圧ブレーカの作業姿勢に関係なく、チゼル部より
異物が浸入しない構造の油圧ブレーカを提供するべく、
ブレーカ下部に摺動自在に収容され、先端部をブレーカ
下部から突出させたチゼルと、シリンダに摺動自在に収
容され油圧の切り換えにより上下動して前記チゼルを打
撃する打撃ピストンとを備える油圧ブレーカにおいて、
ブレーカ下部から突出したチゼルの先端部にジャバラを
外嵌めし、ジャバラの両端をチゼル先端部とブレーカ下
部下端とにそれぞれ固着してなる油圧ブレーカとした。SUMMARY OF THE INVENTION In view of the above circumstances, the present invention does not allow foreign matter to enter the chisel portion of a work site where dust, rock powder or muddy water is present, regardless of the working posture of the hydraulic breaker. In order to provide a hydraulic breaker with a structure,
A hydraulic breaker including a chisel slidably housed in the lower portion of the breaker and having a tip protruding from the lower portion of the breaker, and a striking piston housed slidably in the cylinder and moving up and down by switching hydraulic pressure to hit the chisel. At
A bellows was externally fitted to the tip of the chisel projecting from the lower part of the breaker, and the both ends of the bellows were fixed to the tip of the chisel and the lower end of the lower part of the breaker, respectively.
【００１１】また、本発明は、ジャバラの損傷を防止す
るため、チゼルのジャバラを固着する部所より先端側に
鍔を突設させた。さらに、本発明は、ジャバラを保護す
るために、基端をチゼル先端部またはブレーカ下部下端
に固着し、ジャバラを覆う保護カバーを設けてなる油圧
ブレーカとした。Further, in the present invention, in order to prevent the bellows from being damaged, a flange protrudes from the portion where the bellows of the chisel is fixed to the front end side. Furthermore, in order to protect the bellows, the present invention provides a hydraulic breaker in which a base end is fixed to a tip end of a chisel or a lower end of a lower portion of a breaker, and a protective cover for covering the bellows is provided.
【００１２】また、本発明は、打撃ピストンでチゼル上
端面を打撃する、シリンダ内の打撃室に圧力逃がし弁を
設けてなる油圧ブレーカとした。Further, the present invention is a hydraulic breaker in which a pressure relief valve is provided in a striking chamber in a cylinder, in which a striking piston strikes an upper end surface of a chisel.
【００１３】[0013]
【発明の実施の形態】本発明は、添付する図面の図１〜
図３に示す具体的な一実施例に基づいて以下詳細に説明
する。図１に示すように、トンネル専用油圧ブレーカ
は、ブレーカ下部１に摺動自在に収容され、先端部をブ
レーカ下部１から突出させたチゼル２と、シリンダ３に
摺動自在に収容され、油圧の切り換えにより上下動し
て、前記チゼル２を打撃する打撃ピストン４を備えてい
る。DETAILED DESCRIPTION OF THE INVENTION The present invention is illustrated in FIGS.
This will be described in detail below based on a specific embodiment shown in FIG. As shown in FIG. 1, the tunnel-specific hydraulic breaker is slidably accommodated in a lower portion 1 of the breaker, and is slidably accommodated in a cylinder 3 and a chisel 2 having a tip protruding from the lower portion 1 of the breaker. A striking piston 4 that moves up and down by switching to strike the chisel 2 is provided.
【００１４】ブレーカ下部１にはストッパーブッシュ１
３と摩耗ブッシュ１４とを内嵌め固定し、このストッパ
ーブッシュ１３および摩耗ブッシュ１４にチゼル２を摺
動自在に収容する。チゼル２にはブレーカ下部より先端
側の摩耗ブッシュ１４寄りに鍔１９を突設する。シリン
ダ３にはその下端部に円筒状のシリンダブッシュ１５を
内嵌め固定し、さらにシリンダ３の上端寄りにも円筒状
のパッキンブッシュ１６を固定する。打撃ピストン４は
前記シリンダブッシュ１５、パッキンブッシュ１６およ
びシリンダ３の内面と摺動自在に設け、上下動する打撃
ピストン４の下端面によりチゼル２の上端面を打撃可能
とする。符号１７はシリンダ３に取付けたコントロール
バルブであり、このコントロールバルブ１７により油圧
を切り換え打撃ピストン４を上下動させ、チゼル２の上
端面を打撃させる。打撃ピストン４の下端面部分とチゼ
ル２の上端面部分が位置する箇所は打撃室１８である。
符号３１はシリンダカバー、符号３２はピストンガス室
である。A stopper bush 1 is provided on the lower part 1 of the breaker.
The chisel 2 is slidably housed in the stopper bush 13 and the wear bush 14. The chisel 2 has a flange 19 protruding from the lower part of the breaker toward the wear bush 14 on the tip side. A cylindrical cylinder bush 15 is fitted and fixed to the lower end of the cylinder 3, and a cylindrical packing bush 16 is further fixed to the cylinder 3 near the upper end thereof. The striking piston 4 is slidably provided on the inner surfaces of the cylinder bush 15, the packing bush 16 and the cylinder 3 so that the lower end surface of the striking piston 4 which moves up and down can strike the upper end surface of the chisel 2. Reference numeral 17 denotes a control valve attached to the cylinder 3. The control valve 17 switches hydraulic pressure to move the striking piston 4 up and down to strike the upper end surface of the chisel 2. The location where the lower end surface of the impact piston 4 and the upper end surface of the chisel 2 are located is an impact chamber 18.
Reference numeral 31 denotes a cylinder cover, and reference numeral 32 denotes a piston gas chamber.
【００１５】本発明は、ブレーカ下部１に摺動自在に収
容され、先端部をブレーカ下部１から突出させたチゼル
２と、シリンダ３に摺動自在に収容され油圧の切り換え
により上下動して前記チゼル２を打撃する打撃ピストン
４とを備える油圧ブレーカにおいて、ブレーカ下部１か
ら突出したチゼル２の先端部で前記鍔１９より摩耗ブッ
シュ１４側に先端側溝４１を設け、ウレタンゴム製のジ
ャバラ４２の一端をチゼル２の先端側溝４１に係合させ
ジャバラ４２の他端を摩耗ブッシュ１４外周面下部に係
合させて取付けてなる油圧ブレーカである。According to the present invention, a chisel 2 slidably accommodated in a lower portion 1 of a breaker and having a tip end protruding from the lower portion 1 of the breaker and slidably accommodated in a cylinder 3 are moved up and down by switching hydraulic pressure. In a hydraulic breaker having a striking piston 4 for striking the chisel 2, a tip side groove 41 is provided at a tip end of the chisel 2 protruding from the breaker lower part 1 on the wear bush 14 side from the flange 19, and one end of a urethane rubber bellows 42 is provided. Is a hydraulic breaker which is mounted by engaging the front end side groove 41 of the chisel 2 and the other end of the bellows 42 with the lower part of the outer peripheral surface of the wear bush 14.
【００１６】また、本発明は、ジャバラ４２の損傷を防
止するため、図２に示すように基端をチゼル２の先端部
の鍔１９の上部にピン４３により固着し、ジャバラ４２
を覆う保護カバー４４を設ける。ジャバラの損傷を防止
するための別の方法として、図３に示すように基端をブ
レーカ下部１の下端にボルト４５により固着し、ジャバ
ラ４２を覆う保護カバー４６を設けることもできる。In the present invention, in order to prevent the bellows 42 from being damaged, as shown in FIG. 2, the base end is fixed to the upper part of the flange 19 at the distal end of the chisel 2 by means of a pin 43.
Is provided. As another method for preventing the bellows from being damaged, a protective cover 46 that covers the bellows 42 by fixing the base end to the lower end of the lower portion 1 of the breaker with bolts 45 as shown in FIG. 3 can be provided.
【００１７】さらにその上に、本発明は油圧ブレーカの
打撃ピストン４が上下に往復することにより打撃室１８
の体積が変化し、圧力が変動する打撃室１８の圧力を逃
がすために、打撃室１８に圧力逃がし弁４７を設ける。
本発明は、ジャバラ４２を取付けチゼル２の摺動部を密
閉構造としてチゼル２の摺動部に粉塵、岩石の粉や泥水
などを浸入させないためである。Furthermore, according to the present invention, the impact chamber 4 is moved upward and downward by the impact piston 4 of the hydraulic breaker.
A pressure relief valve 47 is provided in the striking chamber 18 in order to relieve the pressure in the striking chamber 18 whose volume changes and the pressure fluctuates.
The present invention is to mount the bellows 42 and make the sliding portion of the chisel 2 a sealed structure so that dust, rock powder, muddy water and the like do not enter the sliding portion of the chisel 2.
【００１８】[0018]
【発明の効果】本発明は、上述のように、ブレーカ下部
に摺動自在に収容され、先端部をブレーカ下部から突出
させたチゼルと、シリンダの上部に摺動自在に収容され
油圧の切り換えにより上下動して前記チゼルを打撃する
打撃ピストンとを備える油圧ブレーカにおいて、ブレー
カ下部から突出したチゼルの先端部にジャバラを外嵌め
し、ジャバラの両端をチゼル先端部とブレーカ下部下端
とにそれぞれ固着してなる油圧ブレーカであるので、粉
塵の多いトンネル現場でのブレーカ作業で作業姿勢に関
係なく粉塵、岩石の粉、泥水などがチゼルに伝わってブ
レーカ内に浸入することがなく、油圧ショベルの作動油
が異物により汚染されることがなくなる。また、本発明
では、油圧ブレーカのパッキンの寿命をのばすことがで
き油もれの発生が少なくなった。According to the present invention, as described above, a chisel slidably housed in the lower portion of the breaker and having a tip end protruding from the lower portion of the breaker, and a slidably housed upper portion of the cylinder are provided by switching hydraulic pressure. In a hydraulic breaker comprising a striking piston that moves up and down to strike the chisel, bellows are externally fitted to the tip of the chisel projecting from the lower part of the breaker, and both ends of the bellows are fixed to the chisel tip and the lower end of the breaker lower, respectively. Hydraulic breaker, the dust, rock powder, muddy water, etc. are not transmitted to the chisel and penetrate into the breaker regardless of the working posture in the breaker work at the dusty tunnel site, and the hydraulic excavator hydraulic oil Is not contaminated by foreign matter. Further, in the present invention, the life of the packing of the hydraulic breaker can be extended, and the occurrence of oil leakage is reduced.
【００１９】また、本発明は基端をチゼル先端部または
ブレーカ下部下端に固着し、ジャバラを覆う保護カバー
を設けて、ジャバラの損傷を防止できる。さらに、本発
明は、打撃ピストンでチゼル上端面を打撃する、シリン
ダー内の打撃室に圧力逃がし弁を設けて、ジャバラ内の
内圧を高くならないようにした。ジャバラはゴム等弾性
材質で、耐久性向上のためゴムの内部に布を入れたり、
ジャバラの屈折部の内外にリング状の金属環を組み込ん
でもよい。Further, according to the present invention, it is possible to prevent the bellows from being damaged by fixing the base end to the tip of the chisel or the lower end of the lower portion of the breaker and providing a protective cover for covering the bellows. Further, in the present invention, a pressure relief valve is provided in a striking chamber in the cylinder, which strikes the upper end surface of the chisel with a striking piston, so that the internal pressure in the bellows is not increased. Bellows are an elastic material such as rubber, and put a cloth inside the rubber to improve durability.
A ring-shaped metal ring may be incorporated inside and outside of the bellows bending portion.
【図１】本発明の具体的一実施例の縦断面図である。FIG. 1 is a longitudinal sectional view of a specific embodiment of the present invention.
【図２】図１の要部の拡大図である。FIG. 2 is an enlarged view of a main part of FIG.
【図３】本発明の保護カバーの他の取付例の縦断面図で
ある。FIG. 3 is a longitudinal sectional view of another example of mounting the protective cover of the present invention.
【図４】従来の油圧ブレーカの縦断面図である。FIG. 4 is a longitudinal sectional view of a conventional hydraulic breaker.
１…ブレーカ下部 ２…チゼル ３…シリンダ ４…打撃ピストン １３…ストッパーブッシュ １４…摩耗ブッシュ １５…シリンダブッシュ １６…パッキンブッシュ １７…コントロールバルブ １８…打撃室 １９…鍔 ３１…シリンダカバー ３２…ピストンガス室 ４１…先端側溝 ４２…ジャバラ ４３…ピン ４４…保護カバー ４５…ボルト ４６…保護カバー DESCRIPTION OF SYMBOLS 1 ... Breaker lower part 2 ... Chisel 3 ... Cylinder 4 ... Impact piston 13 ... Stopper bush 14 ... Wear bush 15 ... Cylinder bush 16 ... Packing bush 17 ... Control valve 18 ... Impact chamber 19 ... Flange 31 ... Cylinder cover 32 ... Piston gas chamber 41 ... Tip side groove 42 ... Bellows 43 ... Pin 44 ... Protective cover 45 ... Bolt 46 ... Protective cover
Claims (5)
端部をブレーカ下部から突出させたチゼルと、シリンダ
に摺動自在に収容され油圧の切り換えにより上下動して
前記チゼルを打撃する打撃ピストンとを備える油圧ブレ
ーカにおいて、ブレーカ下部から突出したチゼルの先端
部にジャバラを外嵌めし、ジャバラの両端をチゼル先端
部とブレーカ下部下端とにそれぞれ固着してなる油圧ブ
レーカ。1. A chisel housed slidably at a lower portion of a breaker and having a tip end projecting from the lower portion of the breaker, and a striking piston housed slidably in a cylinder and moving up and down by switching hydraulic pressure to hit the chisel. A hydraulic breaker comprising: a bellows externally fitted to a tip end of a chisel projecting from a lower portion of a breaker; and both ends of the bellows being fixed to a tip end portion of the chisel and a lower end of the lower portion of the breaker.
端側に鍔を突設させた請求項１記載の油圧ブレーカ。2. The hydraulic breaker according to claim 1, wherein a flange is projected from a position where the bellows of the chisel is fixed to a tip end side.
を覆う保護カバーを設けてなる請求項１および請求項２
記載の油圧ブレーカ。3. A protection cover for covering the bellows with the base end fixed to the chisel tip.
Hydraulic breaker as described.
バラを覆う保護カバーを設けてなる請求項１および請求
項２記載の油圧ブレーカ。4. The hydraulic breaker according to claim 1, wherein a base end is fixed to a lower end of a lower portion of the breaker, and a protective cover for covering the bellows is provided.
る、シリンダ内の打撃室に圧力逃がし弁を設けてなる請
求項１、請求項２、請求項３および請求項４記載の油圧
ブレーカ。5. The hydraulic breaker according to claim 1, wherein a pressure relief valve is provided in a striking chamber in the cylinder, wherein the striking piston strikes an upper end surface of the chisel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10104584A JPH11300651A (en) | 1998-04-15 | 1998-04-15 | Hydraulic breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10104584A JPH11300651A (en) | 1998-04-15 | 1998-04-15 | Hydraulic breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11300651A true JPH11300651A (en) | 1999-11-02 |
Family
ID=14384496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10104584A Pending JPH11300651A (en) | 1998-04-15 | 1998-04-15 | Hydraulic breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11300651A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007268660A (en) * | 2006-03-31 | 2007-10-18 | Nippon Pneumatic Mfg Co Ltd | Hydraulic breaker |
| JP4503205B2 (en) * | 2001-08-17 | 2010-07-14 | 株式会社フジタ | Crushing machine |
| JP2010158771A (en) * | 2010-03-17 | 2010-07-22 | Fujita Corp | Crusher |
| JP2010274344A (en) * | 2009-05-27 | 2010-12-09 | Okazaki:Kk | Hydraulic breaker |
| KR101285288B1 (en) * | 2011-05-24 | 2013-07-11 | 대모 엔지니어링 주식회사 | Hydraulic breaker with low noise and vibration structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4887686U (en) * | 1972-01-24 | 1973-10-23 | ||
| JPS5652192A (en) * | 1979-08-21 | 1981-05-11 | Kone Oy | Hydraulic pressure impact machine |
| JPH01145589U (en) * | 1988-03-15 | 1989-10-06 | ||
| JPH01274971A (en) * | 1988-04-26 | 1989-11-02 | Mazda Motor Corp | Striking tool |
| JPH0646049U (en) * | 1992-11-26 | 1994-06-24 | 新キャタピラー三菱株式会社 | Bucket excavator |
-
1998
- 1998-04-15 JP JP10104584A patent/JPH11300651A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4887686U (en) * | 1972-01-24 | 1973-10-23 | ||
| JPS5652192A (en) * | 1979-08-21 | 1981-05-11 | Kone Oy | Hydraulic pressure impact machine |
| JPH01145589U (en) * | 1988-03-15 | 1989-10-06 | ||
| JPH01274971A (en) * | 1988-04-26 | 1989-11-02 | Mazda Motor Corp | Striking tool |
| JPH0646049U (en) * | 1992-11-26 | 1994-06-24 | 新キャタピラー三菱株式会社 | Bucket excavator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4503205B2 (en) * | 2001-08-17 | 2010-07-14 | 株式会社フジタ | Crushing machine |
| JP2007268660A (en) * | 2006-03-31 | 2007-10-18 | Nippon Pneumatic Mfg Co Ltd | Hydraulic breaker |
| JP2010274344A (en) * | 2009-05-27 | 2010-12-09 | Okazaki:Kk | Hydraulic breaker |
| JP2010158771A (en) * | 2010-03-17 | 2010-07-22 | Fujita Corp | Crusher |
| KR101285288B1 (en) * | 2011-05-24 | 2013-07-11 | 대모 엔지니어링 주식회사 | Hydraulic breaker with low noise and vibration structure |
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