JP4652298B2 - Lubricating structure for driving parts of hand-held power work machines - Google Patents

Lubricating structure for driving parts of hand-held power work machines Download PDF

Info

Publication number
JP4652298B2
JP4652298B2 JP2006216920A JP2006216920A JP4652298B2 JP 4652298 B2 JP4652298 B2 JP 4652298B2 JP 2006216920 A JP2006216920 A JP 2006216920A JP 2006216920 A JP2006216920 A JP 2006216920A JP 4652298 B2 JP4652298 B2 JP 4652298B2
Authority
JP
Japan
Prior art keywords
communication path
end side
grease
drive
gear
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.)
Expired - Fee Related
Application number
JP2006216920A
Other languages
Japanese (ja)
Other versions
JP2008035821A (en
Inventor
晃宜 久保田
Original Assignee
株式会社マキタ沼津
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社マキタ沼津 filed Critical 株式会社マキタ沼津
Priority to JP2006216920A priority Critical patent/JP4652298B2/en
Publication of JP2008035821A publication Critical patent/JP2008035821A/en
Application granted granted Critical
Publication of JP4652298B2 publication Critical patent/JP4652298B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0463—Grease lubrication; Drop-feed lubrication

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Harvester Elements (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Description

本発明は、手持ち式動力作業機、特にヘッジトリマ、刈払機等の回転運動を往復運動に変換する駆動部品を備えた手持ち式動力刈取機作業機の駆動部品潤滑構造に関する。   The present invention relates to a drive part lubrication structure for a hand-held power reaper working machine provided with a drive part for converting a rotary motion of a hand-held power work machine, particularly a hedge trimmer, a brush cutter, etc. into a reciprocating motion.

駆動ギヤにより従動ギヤを回転駆動し、従動ギヤの回転運動を往復運動に変換する手持ち式動力作業機のうち、例えば、ヘッジトリマは、作業者自身の腕によって支えられるので、長時間作業をしても疲労を防止するために、部品点数を減らして作業機本体を軽量化する試みが従来から行われている。   Among hand-held power working machines that rotate the driven gear by the drive gear and convert the rotational movement of the driven gear into reciprocating movement, for example, the hedge trimmer is supported by the operator's own arm, In order to prevent fatigue, attempts have been made to reduce the number of parts and reduce the weight of the work machine body.

またヘッジトリマの従動ギヤの回転運動を往復運動に変換する駆動部品の潤滑は、一般的にグリスが用いられているが、駆動部品へのグリス供給が不十分になると、焼付きや摩耗等が発生して駆動部品が損傷する虞が生じる。   In addition, grease is generally used to lubricate the drive parts that convert the rotational movement of the driven gear of the hedge trimmer into reciprocating movements, but seizure, wear, etc. occur if the grease supply to the drive parts is insufficient. As a result, the drive parts may be damaged.

そこで、駆動部品の回転部にボールベアリングやニードルベアリングを装着してグリス補給を減らすことが可能な手持ち作業装置や、駆動部品に動力を伝達する従動ギヤ等に凹みや切欠きを設けてグリスの受容を容易にして潤滑性を向上させた手持ち作業装置が開発されている(特許文献1参照)。   Therefore, a recess or notch is provided in the hand-held work device that can reduce the replenishment of grease by attaching a ball bearing or needle bearing to the rotating part of the drive part, or a driven gear that transmits power to the drive part. A hand-held work device that facilitates acceptance and improves lubricity has been developed (see Patent Document 1).

ボールベアリングやニードルベアリングを装着した手持ち作業装置では、部品点数の増加によってコストが増大するという問題が生じる。一方、特許文献1に記載の手持ち作業装置では、凹部に潤滑油を受容しても、従動ギヤや駆動部品を収容するハウジングと従動ギヤや駆動部品との間の隙間が大きいので、手持ち作業装置の姿勢によっては凹部に受容された潤滑油が漏れ出して、十分な潤滑性能を発揮させることができないという問題が生じる。   In a hand-held work apparatus equipped with a ball bearing or a needle bearing, there is a problem that the cost increases due to an increase in the number of parts. On the other hand, in the hand-held work device described in Patent Document 1, even if the lubricating oil is received in the recess, the gap between the driven gear and the drive component housing and the driven gear and the drive component is large. Depending on the posture, the lubricating oil received in the concave portion leaks, and there is a problem that sufficient lubricating performance cannot be exhibited.

そこで、本出願人は、駆動ギヤを囲むギヤケースの内側面部を駆動ギヤに近接して設け、従動ギヤを囲むギヤケースの内側面部を従動ギヤに近接して設け、従動ギヤに設けられた偏心カムに摺動可能に嵌合するロッドの大回動部の移動軌跡範囲の近傍位置と駆動ギヤ及び従動ギヤの噛合い部近傍との間を連通する連通路をギヤケースに設け、ギヤケース内にグリスを受容する受容部を設け、駆動ギヤ及び従動ギヤの回転によるポンピング効果によって送り出されるグリスを、連通路を介して大回動部に供給する、という駆動部品潤滑構造に関する提案を行っている。この潤滑構造によれば、駆動部品の大回動部にベアリングを設けなくても、駆動部品の潤滑が十分に得られるので、部品点数を減らしてコストを安価にすることができる。またポンピング効果によって送り出されるグリスは連通路を流れて大回動部に供給され、またギヤケース内のグリスが減少しても受容部からのグリス供給が可能であるので、作業装置の姿勢に拘わらずに駆動部品への潤滑性能を十分に発揮させることができる。   Accordingly, the applicant of the present invention provides the inner side surface portion of the gear case surrounding the drive gear close to the drive gear, the inner side surface portion of the gear case surrounding the driven gear provided close to the driven gear, and the eccentric cam provided on the driven gear. The gear case is provided with a communication path that communicates between the position in the vicinity of the movement trajectory range of the large rotating part of the rod that is slidably fitted and the vicinity of the meshing part of the drive gear and driven gear, and receives grease in the gear case. Proposing a drive part lubrication structure in which a receiving part is provided, and grease sent out by a pumping effect by the rotation of the drive gear and the driven gear is supplied to the large rotation part via the communication path. According to this lubrication structure, the drive component can be sufficiently lubricated without providing a bearing in the large rotation portion of the drive component, so that the number of components can be reduced and the cost can be reduced. Also, the grease sent out by the pumping effect flows through the communication path and is supplied to the large rotating part. Even if the grease in the gear case is reduced, the grease can be supplied from the receiving part. In addition, the lubrication performance for the drive parts can be sufficiently exhibited.

特開平１０−１３６７８４号公報JP-A-10-136784

この本出願人が提案した潤滑構造によれば、グリスは、駆動部品が駆動すると、ギヤケース内面と駆動部品との間に形成された狭い空間内でグリスの攪拌が増長されるので、不必要にグリスの温度や圧力が上昇する虞がある。このグリスの温度上昇や圧力上昇は、グリスの粘度を低下させて、駆動部品各部の潤滑性能が低下するだけでなく、刃物の摺動面からギヤケース外部にグリス自体が容易に流出して、早期にグリス切れが起きるという不都合が生じる。この場合、グリスの補給を定期的に行えばよいが、この補給作業は作業者にとって煩わしく、一方、グリス補給を行わないと、最悪の場合には潤滑不良によって駆動部品が焼付くという問題が発生する。   According to the lubrication structure proposed by the present applicant, when the drive component is driven, the grease is agitated in a narrow space formed between the inner surface of the gear case and the drive component. Grease temperature and pressure may increase. This increase in temperature and pressure of the grease not only reduces the viscosity of the grease and reduces the lubrication performance of each part of the drive component, but also the grease itself easily flows out of the gear case from the sliding surface of the blade. Inconvenient that the grease breaks. In this case, it is only necessary to replenish grease periodically, but this replenishment work is troublesome for the operator. On the other hand, if the grease is not replenished, there is a problem that the drive parts are seized due to poor lubrication in the worst case. To do.

本発明は、グリスの温度、圧力上昇を無くして、駆動部品の潤滑性能の低下やグリスの流出を防止して、駆動部品等が焼付く事態を防止することができ、且つ軽量の手持ち式動力作業機の駆動部品潤滑構造を提供することを目的とする。   The present invention eliminates an increase in the temperature and pressure of grease, prevents a decrease in lubrication performance of the drive parts and prevents the grease from flowing out, prevents the drive parts from being seized, and is a lightweight hand-held power It is an object of the present invention to provide a drive part lubrication structure for a work machine.

このような課題を解決するため、本発明は以下の特徴を有する。特徴の一つは、駆動ギヤにより従動ギヤを回転駆動し、従動ギヤの回転運動を往復運動に変換し、駆動ギヤ及び従動ギヤを収容するギヤケース内部の駆動部品（例えば、実施形態における駆動ギヤ２１，従動ギヤ２３，偏心カム３１，３１'，ロッド３３，３３'）を、駆動ギヤ及び従動ギヤのポンピング効果によって圧送されるグリスで潤滑する手持ち式動力作業機（例えば、実施形態におけるヘッジトリマ１）の駆動部品潤滑構造であって、ギヤケース内部を、フリクションプレートによって、駆動部品の基端側を収容する基端側収容部とグリスを受容する受容部とに仕切り、駆動ギヤ及び従動ギヤのポンピング効果によって、基端側収容部から受容部にグリスを圧送する連通路（例えば、実施形態における第２連通路５４）を設け、フリクションプレートに、受容部に圧送されたグリスを基端側収容部に排出するための排出孔を設けたことを特徴とする   In order to solve such a problem, the present invention has the following features. One of the features is that the driven gear is driven to rotate by the drive gear, the rotational movement of the driven gear is converted into a reciprocating motion, and the drive component inside the gear case that houses the drive gear and the driven gear (for example, the drive gear 21 in the embodiment). , Driven gear 23, eccentric cams 31, 31 ′, rods 33, 33 ′) are lubricated with grease pumped by the pumping effect of the drive gear and driven gear (for example, hedge trimmer 1 in the embodiment). In the drive part lubrication structure, the inside of the gear case is partitioned by a friction plate into a base end side receiving part for receiving the base end side of the drive part and a receiving part for receiving the grease, and the pumping effect of the drive gear and the driven gear To provide a communication path (for example, the second communication path 54 in the embodiment) for pressure-feeding grease from the base end side receiving section to the receiving section. The Deployment plate, characterized in that the grease is pumped to the receiving unit provided with discharge hole for discharging the proximal housing portion

この特徴によれば、フリクションプレートによって、ギヤケース内部を基端側収容部と受容部とに仕切り、駆動ギヤ及び従動ギヤのポンピング効果によって基端側収容部から受容部にグリスを圧送する連通路を設け、フリクションプレートに排出孔を設けることにより、グリスは、ポンピング効果によって基端側収容部から受容部に圧送され、受容部の排出孔から既に受容されているグリスが排出される。このように、ポンピング効果によって圧送されるグリスは受容部で一旦受容され、排出孔から既に受容されているグリスが排出されるので、受容部においてグリス交換が適度に行われて、グリスの温度上昇を適度に抑制することができる。それによって、グリスの軟化を抑制することができ、ギヤケースからグリスが流出する事態を抑制して、駆動部品の焼付き等による損傷を防止することができる。   According to this feature, the friction plate divides the inside of the gear case into the base end side receiving portion and the receiving portion, and the communication path that pumps grease from the base end side receiving portion to the receiving portion by the pumping effect of the drive gear and the driven gear. By providing the discharge hole in the friction plate, the grease is pumped to the receiving part from the proximal end side receiving part by the pumping effect, and the already received grease is discharged from the discharge hole of the receiving part. In this way, the grease pumped by the pumping effect is once received by the receiving part, and the already received grease is discharged from the discharge hole, so that the grease exchange is appropriately performed in the receiving part and the temperature of the grease rises. Can be moderately suppressed. Accordingly, the softening of the grease can be suppressed, the situation where the grease flows out from the gear case can be suppressed, and the damage due to seizure of the driving component can be prevented.

また特徴の一つは、排出孔が、従動ギヤに設けられた偏心カムに摺動可能に嵌合して従動ギヤからの動力を作業部に伝達する駆動部品のロッドの大回動部が移動する移動軌跡範囲内に設けられることを特徴とする。   Also, one of the features is that the large rotation part of the rod of the drive part that the discharge hole is slidably fitted to the eccentric cam provided in the driven gear and transmits the power from the driven gear to the working part moves. It is provided in the movement locus range to be.

この特徴によれば、排出孔をロッドの大回動部が移動する移動軌跡範囲内に設けることで、特に潤滑の必要なロッドの大回動部に効果的にグリスを供給することができ、摩耗による駆動部品の損傷をさらに防止することができる。   According to this feature, by providing the discharge hole within the movement trajectory range in which the large rotation portion of the rod moves, it is possible to effectively supply grease to the large rotation portion of the rod that needs lubrication in particular, It is possible to further prevent the drive parts from being damaged due to wear.

また特徴の一つは、基端側収容部に連通して少なくとも駆動部品の往復運動する先端側を収容する先端側収容部と、基端側収容部から先端側収容部に圧送されたグリスを該基端側収容部に戻すための戻し連通路を、ギヤケース内部に設けたことを特徴とする。   Further, one of the features is that a distal end side accommodating portion that communicates with the proximal end side accommodating portion and accommodates at least the distal end side where the drive component reciprocates, and grease that is pressure-fed from the proximal end side accommodating portion to the distal end side accommodating portion. A return communication path for returning to the base end side accommodating portion is provided inside the gear case.

この特徴によれば、ギヤケース内部に先端側収容部と戻し連通路を設けることで、駆動部品の往復運動によって先端側収容部内のグリス圧力が上昇しても、すると、グリスは戻し連通路を通って基端側収容部内に戻される。このため、特に上昇し易い先端側収容部内のグリス圧力の上昇を抑制することができ、ギヤケースから外部にグリスが流出する量を低減することができ、摩耗による駆動部品の損傷をより防止することができる。   According to this feature, by providing the distal end side accommodating portion and the return communication path inside the gear case, even if the grease pressure in the distal end side accommodating portion increases due to the reciprocating motion of the drive component, the grease passes through the return communication path. Then, it is returned to the proximal end side accommodating portion. For this reason, it is possible to suppress an increase in the grease pressure in the tip side accommodating portion that is particularly likely to rise, to reduce the amount of grease flowing out from the gear case, and to further prevent damage to the drive parts due to wear. Can do.

さらに特徴の一つは、ギヤケースは、本体部と、該本体部に装着される蓋部とを備え、本体部と蓋部との間にシール部材を介在して本体部と蓋部とを液密に接続し、戻し連通路は、本体部に形成された先端側収容部に連通してギヤケース先端側から基端側へ延びる本体側連通路と、蓋部に形成されてギヤケース基端側から先端側へ延びる蓋側連通路とを有し、本体側連通路及び蓋側連通路は、蓋部が本体部に装着された状態で各先端部が互いに交差し、これら連通路の交差部分において、蓋側連通路の開口部の内側に本体側連通路の開口部が開口し、交差部分に延びるシール部材に、蓋側連通路の開口部の内側であって本体側連通路の開口部を囲むように切り込んで形成された弁体によって本体側連通路から蓋側連通路へのグリスの流れを許容すると共に蓋側連通路から本体側連通路へのグリスの流れを規制する逆止弁を設けたことを特徴とする。   Further, one of the features is that the gear case includes a main body portion and a lid portion attached to the main body portion, and the main body portion and the lid portion are liquidated by interposing a seal member between the main body portion and the lid portion. The return communication path is closely connected to the main body side communication path that extends from the front end side of the gear case to the base end side and communicates with the front end side receiving portion formed in the main body section, and the gear case base end side that is formed in the lid section. A lid-side communication path extending to the distal end side, and the main body-side communication path and the lid-side communication path intersect with each other with the lid portion mounted on the main body, and at the intersection of these communication paths The opening of the main body side communication path is opened inside the opening of the lid side communication path, and the opening of the main body side communication path is provided inside the opening of the lid side communication path on the seal member extending to the intersection. The valve body formed by encircling allows the flow of grease from the main body side communication path to the lid side communication path. Characterized in that a check valve for regulating the flow of grease from the cover-side communication path to the main body side communication path as well as.

この特徴によれば、本体側連通路と蓋側連通路の各先端部の交差部分に逆止弁を設けることにより、蓋側連通路から本体側連通路へのグリスの逆流を防止することができるとともに、基端側収容部と先端側収容部との間でグリスの環流経路を構築することができる。これによって、圧力上昇し易い先端側収容部の圧力上昇が防止され、グリスのギヤケースから外部への流出を抑制することができ、駆動部品の損傷を防止することができる。また逆止弁は、本体部と蓋部との間に介在されたシール部材に切り込みを入れて形成されるものであり、容易に逆止弁を設けることができる。   According to this feature, it is possible to prevent the backflow of grease from the lid side communication path to the main body side communication path by providing a check valve at the intersection of each tip of the main body side communication path and the lid side communication path. In addition, a grease circulation path can be constructed between the proximal-side accommodation portion and the distal-side accommodation portion. As a result, an increase in pressure in the front-side accommodation portion that is likely to increase in pressure can be prevented, the outflow of grease from the gear case to the outside can be suppressed, and damage to the drive components can be prevented. The check valve is formed by cutting a seal member interposed between the main body portion and the lid portion, and the check valve can be easily provided.

また特徴の一つは、連通路は、駆動部品の運動によって変化する基端側収容部内の空間部のうちの縮小される空間部の容積が略最小となる位置の付近で、縮小された空間部と受容部とを連通する第１連通路を備えることを特徴とする。   Further, one of the features is that the communication path is a reduced space in the vicinity of a position where the volume of the space portion to be reduced among the space portions in the proximal-side accommodation portion that changes due to the movement of the drive component is substantially minimized. It is characterized by comprising a first communication path that communicates the part and the receiving part.

この特徴によれば、連通路は縮小された空間部と受容部とを連通する第１連通路を備えることで、空間部の容積が略最小となる空間部では、グリスは圧縮されて温度上昇を招いて軟化し易いが、この圧縮されたグリスは、第１連通路を流れて受容部に圧送されるので、受容部において速やかにグリス交換が行われて、グリスの軟化を防止することができ、且つギヤケースからグリスが流出する事態を防止することができる。これによって、駆動部品の損傷を防止することができる。   According to this feature, the communication path includes the first communication path that connects the reduced space portion and the receiving portion, so that the grease is compressed and the temperature rises in the space portion where the volume of the space portion is substantially minimized. However, since this compressed grease flows through the first communication path and is pumped to the receiving portion, the grease is quickly exchanged in the receiving portion, thereby preventing the softening of the grease. It is possible to prevent the grease from flowing out of the gear case. As a result, it is possible to prevent the drive components from being damaged.

また特徴の一つは、連通路は、駆動ギヤ及び従動ギヤの噛合い部近傍と受容部とを連通する第２連通路を備えることを特徴とする。   One of the characteristics is that the communication path includes a second communication path that connects the vicinity of the meshing portion of the drive gear and the driven gear with the receiving portion.

この特徴によれば、駆動ギヤ及び従動ギヤの噛合い部近傍と受容部とを第２連通路で繋ぐことで、噛合い部から供給されるグリスは常に受容部でグリス交換が行われるので、グリスの軟化を防止することができ、ギヤケースからグリスが流出する事態を防止することができ、これによって、駆動部品の損傷を防止することができる。また常にグリス交換ができるので、グリスの劣化を抑制することができる。   According to this feature, the grease supplied from the meshing portion is always exchanged in the receiving portion by connecting the vicinity of the meshing portion of the driving gear and the driven gear and the receiving portion by the second communication path. The softening of the grease can be prevented, and the situation in which the grease flows out from the gear case can be prevented, thereby preventing the drive parts from being damaged. Moreover, since grease exchange is always possible, deterioration of grease can be suppressed.

本発明に係わる手持ち式動力作業機の駆動部品潤滑構造によれば、前述した特徴を有することで、ボールベアリング等を必要とせず、グリスの温度、圧力上昇を無くして、駆動部品各部の潤滑性能の低下やグリスの流出を防止して、駆動部品等が焼付く事態を防止することが可能で、軽量な手持ち式動力作業機の駆動部品潤滑構造を提供することができる。   According to the drive part lubrication structure of the hand-held power working machine according to the present invention, it has the above-described characteristics, and does not require a ball bearing or the like, eliminates the increase in grease temperature and pressure, and lubricates each part of the drive part. It is possible to prevent the drive parts and the like from being seized by preventing the deterioration of the oil and the grease from flowing out, and to provide a drive part lubrication structure for a lightweight hand-held power working machine.

以下、本発明に係わる手持ち式動力作業機の駆動部品潤滑構造の実施形態を図１から図１１に基づいて説明する。本実施形態は、手持ち式動力作業機のうち枝や葉を刈り取るヘッジトリマを例にして説明する。図１はヘッジトリマ１の分解斜視図を示しており、ヘッジトリマ１は、同図に示すように、先端側に刈り取り作業を行う作業部１０を備え、基端側に図示しないエンジンからの動力を作業部１０に伝達する動力伝達装置２０を備えて構成される。   Hereinafter, an embodiment of a drive part lubrication structure for a hand-held power working machine according to the present invention will be described with reference to FIGS. In the present embodiment, a hedge trimmer that cuts branches and leaves of a hand-held power working machine will be described as an example. FIG. 1 shows an exploded perspective view of the hedge trimmer 1. As shown in the figure, the hedge trimmer 1 includes a working portion 10 for performing a cutting operation on the distal end side, and operates power from an engine (not shown) on the proximal end side. A power transmission device 20 for transmitting to the unit 10 is provided.

動力伝達装置２０は、エンジンからの動力を受けて回転動する駆動ギヤ２１と、この駆動ギヤ２１に歯合して駆動ギヤ２１からの動力を受けて回転動する従動ギヤ２３と、この従動ギヤ２３の側面に取り付けられて従動ギヤ２３と連動して従動ギヤ２３からの動力を伝達する伝動機構部３０と、これら駆動ギヤ２１、従動ギヤ２３、伝動機構部３０を回転自在に支持してグリスを収容するギヤケース５０とを有してなる。   The power transmission device 20 includes a drive gear 21 that rotates in response to power from the engine, a driven gear 23 that meshes with the drive gear 21 and rotates in response to power from the drive gear 21, and the driven gear. 23, a transmission mechanism 30 that is attached to the side surface of 23 and transmits the power from the driven gear 23 in conjunction with the driven gear 23, and the drive gear 21, the driven gear 23, and the transmission mechanism 30 are rotatably supported and greased. And a gear case 50 for housing the housing.

従動ギヤ２３は駆動ギヤ２１のピッチ円直径より大径であり、従動ギヤ２３の両側面には従動ギヤ２３の回転中心軸線Ｓより外側に偏心した円板状の偏心カム３１，３１'が一体的に設けられている。これらの偏心カム３１，３１'は従動ギヤ２３より小径であり、従動ギヤ２３の回転中心軸線Ｓを挟んで一直線上に配設されている。   The driven gear 23 is larger in diameter than the pitch circle diameter of the drive gear 21, and disk-shaped eccentric cams 31, 31 ′ eccentric to the outside of the rotation center axis S of the driven gear 23 are integrally formed on both side surfaces of the driven gear 23. Provided. These eccentric cams 31, 31 ′ have a smaller diameter than the driven gear 23, and are arranged on a straight line across the rotation center axis S of the driven gear 23.

伝動機構部３０は、前述した一対の偏心カム３１，３１’と、各偏心カム３１，３１’に回動自在に嵌合したロッド３３，３３’とを有してなる。ロッド３３，３３’は板状であり、連結棒３４，３４’と連結棒３４，３４’の一端側に形成されて偏心カム３１，３１’に回動自在に嵌合する円環状の大回動部３５，３５’と、連結棒３４，３４’の他端側に形成されて作業部１０の基部に回動自在に嵌合して大回動部３５，３５’より小径の円環状の小回動部３７，３７’とを有してなる。   The transmission mechanism 30 includes the pair of eccentric cams 31 and 31 ′ described above and rods 33 and 33 ′ that are rotatably fitted to the eccentric cams 31 and 31 ′. The rods 33 and 33 ′ are plate-like, and are formed on one end side of the connecting rods 34 and 34 ′ and the connecting rods 34 and 34 ′, and are annular large turns that are rotatably fitted to the eccentric cams 31 and 31 ′. It is formed on the other end side of the moving portions 35, 35 'and the connecting rods 34, 34', and is fitted to the base of the working portion 10 so as to be freely rotatable, and has an annular shape smaller in diameter than the large rotating portions 35, 35 '. And a small rotating portion 37, 37 '.

作業部１０は、動力伝達装置２０から延出する一対のブレード１１，１１’を有して構成される。ブレード１１，１１’は板状であり、先端側に複数の刃をブレード１１，１１’の延びる方向に沿って配設している。一対のブレード１１，１１’は側面同士が対向するように配置されて、一方のブレード１１が一方の偏心カム３１に嵌合したロッド３３に連結され、他方のブレード１１’が他方の偏心カム３１’に嵌合したロッド３３’に連結されている。このため、駆動ギヤ２１が回転すると、伝動機構部３０を介して一対のブレード１１，１１’が互いに異なる方向に往復動する。   The working unit 10 includes a pair of blades 11 and 11 ′ extending from the power transmission device 20. The blades 11 and 11 'are plate-like, and a plurality of blades are disposed on the tip side along the extending direction of the blades 11 and 11'. The pair of blades 11, 11 ′ are arranged so that the side surfaces face each other, one blade 11 is connected to a rod 33 fitted to one eccentric cam 31, and the other blade 11 ′ is connected to the other eccentric cam 31. It is connected to a 'rod 33 fitted in'. For this reason, when the drive gear 21 rotates, the pair of blades 11 and 11 ′ reciprocate in different directions via the transmission mechanism 30.

ギヤケース５０は、駆動ギヤ２１を駆動ギヤ収容部５２に、従動ギヤ２３を基端側収容部５５に、伝動機構部３０を基端側収容部５５及び先端側収容部５７に、作業部１０の基端側端部を先端側収容部５７に収容し、本体部５１とこれを覆う蓋部７０とで構成され、本体部５１と蓋部７０の間にガスケット８２が挿入されて締結手段等によって一体化される。   The gear case 50 includes the drive gear 21 in the drive gear housing 52, the driven gear 23 in the proximal housing 55, the transmission mechanism 30 in the proximal housing 55 and the distal housing 57, and the working unit 10. The proximal end portion is accommodated in the distal end side accommodating portion 57, and is constituted by a main body portion 51 and a lid portion 70 covering the main body portion 51, and a gasket 82 is inserted between the main body portion 51 and the lid portion 70 and is fastened by fastening means or the like. Integrated.

従動ギヤ２３と本体部５１、及び従動ギヤ２３と蓋部７０の各間には、フリクションプレート６０がロッド３３，３３’の大回動部３５，３５’と概ね当接するように敷かれている。駆動ギヤ収容部５２の内側面部５２ａは、駆動ギヤ２１に近接して配置され、基端側収容部５５の内側面部５５ａは従動ギヤ２３及び伝動機構部３０に近接して配置されている。   Between each of the driven gear 23 and the main body 51, and between the driven gear 23 and the lid 70, the friction plate 60 is laid so as to substantially contact the large rotating portions 35 and 35 'of the rods 33 and 33'. . The inner side surface portion 52 a of the drive gear housing portion 52 is disposed in the vicinity of the drive gear 21, and the inner surface portion 55 a of the proximal end side housing portion 55 is disposed in the vicinity of the driven gear 23 and the transmission mechanism portion 30.

駆動ギヤ収容部５２と基端側収容部５５は互いに交差しており、各交差部分は互いに開口して駆動ギヤ収容部５２と基端側収容部５５とを連通している。この交差部分に駆動ギヤ２１と従動ギヤ２３の歯部が突出して噛み合っている。以下、この駆動ギヤ２１と従動ギヤ２３とが噛合った部分を「噛合い部２５」と記す。   The drive gear accommodating portion 52 and the base end side accommodating portion 55 intersect with each other, and the intersecting portions are opened to communicate with the drive gear accommodating portion 52 and the base end side accommodating portion 55. The tooth portions of the drive gear 21 and the driven gear 23 protrude and mesh with the intersection. Hereinafter, the portion where the drive gear 21 and the driven gear 23 mesh with each other is referred to as a “meshing portion 25”.

ギヤケース５０内部は潤滑油となるグリスが注入されている。図示しないが、蓋部７０には、噛合い部２５の近傍位置と基端側収容部５５とを連通する第１連通溝が形成され、この第１連通溝は、偏心カム３１'及びロッド３３'の大回動部３５'の回転軌道上で一定時間の間塞がれない位置に配置されている。このため、駆動ギヤ２１及び従動ギヤ２３のポンピング効果によって噛合い部近傍からグリスが容易に大回動部３５'に注入されて、大回動部３５'の潤滑性を向上させることができる。   The gear case 50 is filled with grease serving as lubricating oil. Although not shown, the lid portion 70 is formed with a first communication groove that communicates the position in the vicinity of the meshing portion 25 and the proximal end side accommodation portion 55, and the first communication groove includes the eccentric cam 31 ′ and the rod 33. It is arranged at a position where it is not blocked for a certain time on the rotation trajectory of the 'large rotation part 35'. For this reason, grease can be easily injected into the large rotation portion 35 ′ from the vicinity of the meshing portion by the pumping effect of the drive gear 21 and the driven gear 23, and the lubricity of the large rotation portion 35 ′ can be improved.

ロッド３３，３３’の大回動部３５，３５’の偏心カム３１，３１’との摺動面３５ａ，３５ａ’には凹部３５ｂ，３５ｂ’が形成されている。凹部３５ｂ，３５ｂ’はグリスを受容して大回動部３５，３５’の摺動面３５ａ，３５ａ’の潤滑性能を高める。蓋部側の大回動部３５’には、凹部３５ｂ’と大回動部外周側を連通する図示しない第２連通溝が設けられている。より詳細には、ロッド３３’の回転で縮小して形成される基端側収容部５５の空間部５５ｂの容積が最小となる位置の近傍（以下、「圧縮上死点付近」と記す。）で、空間部５５ｂと凹部３５ｂ’は第２連通溝を介して連通する。そのため、空間部５５ｂからグリスが容易に摺動面３５ａ’に注入されて、摺動面３５ａ’の潤滑性を向上させることができる。   Concave portions 35b and 35b 'are formed on sliding surfaces 35a and 35a' of the large rotating portions 35 and 35 'of the rods 33 and 33' with the eccentric cams 31 and 31 '. The recesses 35b and 35b 'receive grease and enhance the lubrication performance of the sliding surfaces 35a and 35a' of the large rotation portions 35 and 35 '. The large rotation portion 35 ′ on the lid side is provided with a second communication groove (not shown) that communicates the recess 35 b ′ with the outer periphery of the large rotation portion. More specifically, in the vicinity of the position where the volume of the space portion 55b of the proximal end side accommodating portion 55 formed by being reduced by the rotation of the rod 33 ′ is minimized (hereinafter referred to as “compressed top dead center”). Thus, the space 55b and the recess 35b ′ communicate with each other through the second communication groove. Therefore, grease can be easily injected into the sliding surface 35a 'from the space 55b, and the lubricity of the sliding surface 35a' can be improved.

図２はギヤケース５０の本体部５１における裏面図を示し、図３は本体部５１内にフリクションプレート６０を装着した本体部５１の裏面図を示し、図４はギヤケース５０の断面図を示す。ギヤケース５０の本体部５１の基端側収容部５５には、これらの図に示すように、一時的にグリスを貯留する受容部５８が設けられている。受容部５８は、基端側収容部５５の中央部に設けられた軸部５５ｃを境にして本体部５１の幅方向両側に設けられた第１受容部５８ａと第２受容部５８ｂとを有して構成される。第１受容部５８ａ及び第２受容部５８ｂは、従動ギヤ２３が回転する基端側収容部５５をフリクションプレート６０によって仕切るようにして隔てて形成される。   2 shows a back view of the main body 51 of the gear case 50, FIG. 3 shows a back view of the main body 51 with the friction plate 60 mounted in the main body 51, and FIG. 4 shows a cross-sectional view of the gear case 50. As shown in these drawings, a receiving portion 58 for temporarily storing grease is provided in the proximal end side accommodating portion 55 of the main body portion 51 of the gear case 50. The receiving portion 58 has a first receiving portion 58a and a second receiving portion 58b provided on both sides in the width direction of the main body 51 with a shaft portion 55c provided in the central portion of the base end side receiving portion 55 as a boundary. Configured. The first receiving portion 58a and the second receiving portion 58b are formed so as to be separated from each other so that the base end side receiving portion 55 where the driven gear 23 rotates is partitioned by the friction plate 60.

第２受容部５８ｂは、駆動ギヤ２１と従動ギヤ２３の噛合い部２５近傍から延びる第２連通路５４と連通しており、これらのギヤの噛合いによるギヤポンプ効果により、第２受容部５８ｂには常にグリスが圧送される。   The second receiving portion 58b communicates with the second communication passage 54 extending from the vicinity of the meshing portion 25 of the drive gear 21 and the driven gear 23. Due to the gear pump effect by the meshing of these gears, the second receiving portion 58b is connected to the second receiving portion 58b. The grease is always pumped.

フリクションプレート６０は、図５（斜視図）に示すように、基端側収容部５５内に挿着される円盤状の蓋体部６１と、蓋体部６１の一端部から延びる突出部６２を有してなる。蓋体部６１の中央部には前述した軸部５５ｃを挿通する孔部６１ａが設けられ、孔部６１ａを中央にして左右両側には排出孔６１ｂが設けられている。排出孔６１ｂは、基端側収容部５５に受容されたグリスを排出するためのものである。排出孔６１ｂの位置については後述する。   As shown in FIG. 5 (perspective view), the friction plate 60 includes a disc-shaped lid body portion 61 that is inserted into the proximal end side accommodating portion 55 and a protruding portion 62 that extends from one end portion of the lid body portion 61. Have. A hole 61a through which the above-described shaft portion 55c is inserted is provided at the center of the lid 61, and discharge holes 61b are provided on both the left and right sides with the hole 61a at the center. The discharge hole 61 b is for discharging the grease received in the proximal end side accommodating portion 55. The position of the discharge hole 61b will be described later.

図６及び図７は、ギヤケース５０内にフリクションプレート６０及びロッド３３が装着された本体部５１の裏面図を示す。なお、大回動部３５は、図面上、中心軸線Ｓを中心として時計方向に回動する。これらの図に示すように、ロッド３３が回転して移動する大回動部３５の回転運動により得られる基端側収容部５５内の空間部５５ｂの容積変動を利用してグリスを流動させるため、本体部５１の内周面部はロッド３３の大回動部３５の回転軌道に近接した位置に設けられている。そして、この容積変動の前述した圧縮上死点付近の状態で、空間部５５ｂと第１受容部５８ａとを連通する第１連通路５３が本体部５１に設けられている。この第１連通路５３によって、空間部５５ｂから第１受容部５８ａにグリスが圧送される。   6 and 7 are rear views of the main body 51 in which the friction plate 60 and the rod 33 are mounted in the gear case 50. FIG. The large rotation portion 35 rotates clockwise about the central axis S in the drawing. As shown in these drawings, in order to cause the grease to flow by utilizing the volume fluctuation of the space portion 55b in the base end side accommodating portion 55 obtained by the rotational movement of the large rotating portion 35 in which the rod 33 rotates and moves. The inner peripheral surface portion of the main body portion 51 is provided at a position close to the rotation trajectory of the large rotation portion 35 of the rod 33. The main body 51 is provided with a first communication passage 53 that communicates the space portion 55b and the first receiving portion 58a with the volume fluctuation in the vicinity of the compression top dead center. By the first communication path 53, the grease is pumped from the space portion 55b to the first receiving portion 58a.

第１受容部５８ａ及び第２受容部５８ｂと基端側収容部５５は、フリクションプレート６０に設けられた前述した排出孔６１ｂを介して連通している。この排出孔６１ｂは、ロッド３３の大回動部３５にける摺動面３５ａの回転軌跡に掛かるように設けられている。このように第１連通路５３及び前述した第２連通路５４から第１受容部５８ａ及び第２受容部５８ｂにグリスが圧送されるので、これら受容部５８内のグリス圧が高まり、排出孔６１ｂから基端側収容部５５にグリスが供給される。   The first receiving portion 58a, the second receiving portion 58b, and the base end side receiving portion 55 communicate with each other through the discharge hole 61b provided in the friction plate 60. The discharge hole 61b is provided so as to be on the rotation locus of the sliding surface 35a in the large rotation portion 35 of the rod 33. Thus, since the grease is pumped from the first communication path 53 and the second communication path 54 described above to the first receiving portion 58a and the second receiving portion 58b, the grease pressure in the receiving portion 58 is increased, and the discharge hole 61b. The grease is supplied to the proximal end side accommodating portion 55 from the outside.

このように、駆動部品（駆動ギヤ２１、従動ギヤ２３、偏心カム３１，３１’、ロッド３３，３３’）の一連の動作によって、ギヤケース５０の本体部５１内のグリスは循環して、本体部５１内の駆動部品が潤滑される。また排出孔６１ｂから排出されるグリスによって、ロッド３３，３３’の大回動部３５，３５’の潤滑が強化される。   Thus, the grease in the main body 51 of the gear case 50 is circulated by a series of operations of the drive components (the drive gear 21, the driven gear 23, the eccentric cams 31, 31 ', the rods 33, 33'). The drive parts in 51 are lubricated. Further, the grease discharged from the discharge hole 61b enhances the lubrication of the large rotation portions 35 and 35 'of the rods 33 and 33'.

一方、駆動部品の一連の動作の過程で、グリスの一部は先端側収容部５７へと流動して更に作業部１０の基端側端部の往復運動により先端側収容部５７の前側から外部に漏れ出す虞が生じる。そこで、このグリスの流出を避けるため、先端側収容部５７の前部にグランドパッキン８０を配設している。しかしながら、先端側収容部５７へのグリスの流動が過剰になると、先端側収容部５７内の圧力が上昇してグリスがグランドパッキン８０をすり抜けて外部に流出する虞が生じるので、先端側収容部５７から基端側収容部５５にグリスを回収する戻し連通路６４を設けている。   On the other hand, in the course of a series of operations of the drive component, a part of the grease flows to the distal end side accommodating portion 57 and further from the front side of the distal end side accommodating portion 57 by the reciprocating motion of the proximal end side end portion of the working portion 10. There is a risk of leakage. Therefore, in order to avoid the outflow of the grease, the gland packing 80 is disposed in the front portion of the distal end side accommodation portion 57. However, if the grease flows excessively into the distal end side accommodating portion 57, the pressure in the distal end side accommodating portion 57 rises, and there is a risk that the grease will slip through the gland packing 80 and flow out to the outside. A return communication path 64 for collecting grease from the base end side accommodating portion 55 from 57 is provided.

この戻し連通路６４は、図８（裏面図）及び図９（説明図）に示すように、本体部５１に形成された先端側収容部５７の前側に連通してギヤケース先端側から基端側へ延びる本体側連通路６４ａと、蓋部７０に形成されてギヤケース基端側から先端側へ延びる蓋側連通路６４ｂとを有している。本体側連通路６４ａ及び蓋側連通路６４ｂは、蓋部７０が本体部５１に装着された状態で各先端部が互いに交差し、これら連通路の交差部分において、蓋側連通路６４ｂの開口部６４b1の内側に本体側連通路６４ａの開口部６４a1が開口して本体側連通路６４ａ及び蓋側連通路６４ｂが連通している。このため、先端側収容部５７内のグリスは、この収容部内の圧力の上昇を受けて、本体側連通路６４ａ及び蓋側連通路６４ｂを通って基端側収容部５５内に回収される。 As shown in FIGS. 8 (rear view) and FIG. 9 (explanatory view), the return communication path 64 communicates with the front side of the distal end side accommodating portion 57 formed in the main body 51 and is connected to the proximal end side from the gear case distal end side. And a lid side communication passage 64b formed in the lid portion 70 and extending from the gear case base end side to the tip end side. The main body side communication path 64a and the lid side communication path 64b intersect with each other in a state where the lid portion 70 is attached to the main body 51, and an opening portion of the lid side communication path 64b at the intersection of these communication paths. An opening 64 a1 of the main body side communication path 64 a is opened inside 64 b1 , and the main body side communication path 64 a and the lid side communication path 64 b communicate with each other. For this reason, the grease in the distal end side accommodation portion 57 is collected in the proximal end side accommodation portion 55 through the main body side communication passage 64a and the lid side communication passage 64b in response to an increase in pressure in the accommodation portion.

本実施例では、ギヤケース５０の本体部５１と蓋部７０との間に、図１０（平面図）及び図１１（部分拡大図）に示すように、ゴム製のシール部材８２（例えば、ガスケット）を介在して本体部５１と蓋部７０とを液密に封止し、戻し連通路６４の交差部分に延びるシール部材８２に、蓋側連通路６４ｂの開口部６４b1の内側であって本体側連通路６４ａの開口部６４a1を囲むように切り込み８３を入れて形成された弁体８４ａによって本体側連通路６４ａから蓋側連通路６４ｂへのグリスの流れを許容すると共に蓋側連通路６４ｂから本体側連通路６４ａへのグリスの流れを規制する逆止弁８４を設けている。 In this embodiment, as shown in FIG. 10 (plan view) and FIG. 11 (partially enlarged view), a rubber seal member 82 (for example, a gasket) is provided between the main body 51 and the lid 70 of the gear case 50. The main body 51 and the lid 70 are sealed in a liquid-tight manner with a sealing member 82 extending to the intersecting portion of the return communication path 64 inside the opening 64 b1 of the lid-side communication path 64b. the lid-side communication passage 64b while allowing the flow of grease from the body-side communication passage 64a to the cover-side communication path 64b by the valve body 84a formed by cuts 83 so as to surround the opening 64 a1 side communication passage 64a A check valve 84 for restricting the flow of grease from the main body side communication passage 64a is provided.

このように構成することで、基端側収容部５５から先端側収容部５７へのグリスの逆流を防止することができ、グリスの外部への流出を確実に防止することができる。   By comprising in this way, the reverse flow of the grease from the base end side accommodating part 55 to the front end side accommodating part 57 can be prevented, and the outflow of grease to the exterior can be prevented reliably.

本発明の一実施形態に係わるヘッジトリマのギヤケースの分解斜視図を示す。The disassembled perspective view of the gear case of the hedge trimmer concerning one Embodiment of this invention is shown. 本発明の一実施形態に係わるギヤケースの裏面図を示す。The rear view of the gear case concerning one Embodiment of this invention is shown. フリクションプレートが挿着されたギヤケースの裏面図を示す。The back view of the gear case in which the friction plate was inserted is shown. 本発明の一実施形態に係わるギヤケースの断面図を示す。The sectional view of the gear case concerning one embodiment of the present invention is shown. フリクションプレートの斜視図を示す。A perspective view of a friction plate is shown. 本発明の一実施形態に係わるロッドが装着されたギヤケースの裏面図を示す。The rear view of the gear case with which the rod concerning one Embodiment of this invention was mounted | worn is shown. 本発明の一実施形態に係わるロッドが装着されたギヤケースの裏面図を示す。The rear view of the gear case with which the rod concerning one Embodiment of this invention was mounted | worn is shown. 本発明の一実施形態に係わるギヤケースの一部を構成する蓋部の裏面図を示す。The back view of the cover part which comprises a part of gear case concerning one Embodiment of this invention is shown. ギヤケースに設けられた基端側収容部と先端側収容部を連通する戻し連通路を備えたギヤケースの説明図を示す。An explanatory view of a gear case provided with a return communicating path which connects a base end side accommodation part and a tip side accommodation part provided in a gear case is shown. ギヤケースの本体部と蓋部との間に挿入されるシール部材の平面図を示す。The top view of the sealing member inserted between the main-body part of a gear case and a cover part is shown. 戻し連通路に設けられた逆止弁の平面図を示す。The top view of the non-return valve provided in the return communicating path is shown.

符号の説明Explanation of symbols

１ ヘッジトリマ（手持ち式動力作業機）
１０ 作業部
２１ 駆動ギヤ（駆動部品）
２３ 従動ギヤ（駆動部品）
２５ 噛合い部
３１，３１' 偏心カム（駆動部品）
３３，３３' ロッド（駆動部品）
３５，３５' 大回動部
５０ ギヤケース
５１ 本体部
５３ 第１連通路
５４ 第２連通路（連通路）
５５ 基端側収容部
５５ｂ 空間部
５７ 先端側収容部
５８ 受容部
６０ フリクションプレート
６０ｂ 排出孔
６４ 戻し連通路
６４ａ 本体側連通路
６４a1，６４b1 開口部
６４ｂ 蓋側連通路
７０ 蓋部
８２ シール部材
８４ 逆止弁
８４ａ 弁体
1 Hedge trimmer (hand-held power work machine)
10 Working part 21 Drive gear (drive parts)
23 Driven gear (drive parts)
25 Meshing portion 31, 31 'Eccentric cam (drive component)
33,33 'Rod (Drive part)
35, 35 'large rotation part 50 gear case 51 main-body part 53 1st communication path 54 2nd communication path (communication path)
55 Base end side accommodating portion 55b Space portion 57 Front end side accommodating portion 58 Receiving portion 60 Friction plate 60b Discharge hole 64 Return communication passage 64a Main body side communication passage 64a1 , 64b1 opening portion 64b Lid side communication passage 70 Lid portion 82 Seal member 84 Check valve 84a Disc

Claims (6)

駆動ギヤにより従動ギヤを回転駆動し、前記従動ギヤの回転運動を往復運動に変換し、前記駆動ギヤ及び前記従動ギヤを収容するギヤケース内部の駆動部品を、前記駆動ギヤ及び前記従動ギヤのポンピング効果によって圧送されるグリスで潤滑する手持ち式動力作業機の駆動部品潤滑構造であって、
前記ギヤケース内部を、フリクションプレートによって、前記駆動部品の基端側を収容する基端側収容部と前記グリスを受容する受容部とに仕切り、
前記駆動ギヤ及び前記従動ギヤのポンピング効果によって、前記基端側収容部から前記受容部に前記グリスを圧送する連通路を設け、
前記フリクションプレートに、前記受容部に圧送されたグリスを前記基端側収容部に排出するための排出孔を設けたことを特徴とする手持ち式動力作業機の駆動部品潤滑構造。 The driven gear is driven to rotate by the drive gear, the rotational motion of the driven gear is converted into a reciprocating motion, and the drive parts inside the gear case that houses the drive gear and the driven gear are used as the pumping effect of the drive gear and the driven gear. It is a drive part lubrication structure of a hand-held power work machine that is lubricated with grease fed by
The gear case interior is partitioned by a friction plate into a base end side receiving portion for receiving the base end side of the drive component and a receiving portion for receiving the grease,
Due to the pumping effect of the drive gear and the driven gear, a communication path is provided for pressure-feeding the grease from the base end side receiving portion to the receiving portion,
A drive part lubrication structure for a hand-held power working machine, wherein the friction plate is provided with a discharge hole for discharging the grease pressure-fed to the receiving portion to the base end side receiving portion. 前記排出孔は、前記従動ギヤに設けられた偏心カムに摺動可能に嵌合して前記従動ギヤからの動力を作業部に伝達する前記駆動部品のロッドの大回動部が移動する移動軌跡範囲内に設けられることを特徴とする請求項1に記載の手持ち式動力作業機の駆動部品潤滑構造。   The discharge hole is slidably fitted to an eccentric cam provided in the driven gear, and a moving locus of a large rotation portion of the rod of the driving component that transmits power from the driven gear to the working portion moves. 2. The drive part lubrication structure for a hand-held power work machine according to claim 1, wherein the drive part lubrication structure is provided within a range. 前記基端側収容部に連通して少なくとも前記駆動部品の往復運動する先端側を収容する先端側収容部と、前記基端側収容部から前記先端側収容部に圧送されたグリスを該基端側収容部に戻すための戻し連通路を、前記ギヤケース内部に設けたことを特徴とする請求項1又は２に記載の手持ち式動力作業機の駆動部品潤滑構造。   A distal end side accommodating portion that communicates with the proximal end side accommodating portion and accommodates at least a distal end side where the drive component reciprocates, and grease that is pressure-fed from the proximal end side accommodating portion to the distal end side accommodating portion. 3. The drive part lubrication structure for a hand-held power working machine according to claim 1, wherein a return communication path for returning to the side housing portion is provided inside the gear case. 前記ギヤケースは、本体部と、該本体部に装着される蓋部とを備え、
前記本体部と前記蓋部との間にシール部材を介在して前記本体部と前記蓋部とを液密に接続し、
前記戻し連通路は、前記本体部に形成された前記先端側収容部に連通してギヤケース先端側から基端側へ延びる本体側連通路と、前記蓋部に形成されてギヤケース基端側から先端側へ延びる蓋側連通路とを有し、
前記本体側連通路及び前記蓋側連通路は、前記蓋部が前記本体部に装着された状態で各先端部が互いに交差し、これら連通路の交差部分において、前記蓋側連通路の開口部の内側に前記本体側連通路の開口部が開口し、
前記交差部分に延びるシール部材に、前記蓋側連通路の開口部の内側であって前記本体側連通路の開口部を囲むように切り込んで形成された弁体によって前記本体側連通路から前記蓋側連通路へのグリスの流れを許容すると共に前記蓋側連通路から前記本体側連通路へのグリスの流れを規制する逆止弁を設けたことを特徴とする請求項３に記載の手持ち式動力作業機の駆動部品潤滑構造。 The gear case includes a main body portion and a lid portion attached to the main body portion,
Interposing a seal member between the body portion and the lid portion, and liquid-tightly connecting the body portion and the lid portion;
The return communication path includes a main body side communication path that communicates with the distal end side accommodating portion formed in the main body portion and extends from the distal end side of the gear case to the proximal end side, and a distal end from the gear case proximal end side that is formed in the lid portion. A lid side communication path extending to the side,
In the main body side communication path and the lid side communication path, the front end portions intersect with each other in a state where the lid portion is mounted on the main body portion, and an opening portion of the lid side communication path is formed at the intersection of these communication paths. The opening of the main body side communication path is opened inside,
The lid from the main body side communication path is formed by a valve body formed by cutting a seal member extending in the intersecting portion so as to surround the opening of the main body side communication path inside the opening of the cover side communication path. The hand-held type according to claim 3, further comprising a check valve that allows a grease flow to the side communication path and restricts a grease flow from the lid side communication path to the main body side communication path. Drive parts lubrication structure for power work machines. 前記連通路は、前記駆動部品の運動によって変化する前記基端側収容部内の空間部のうちの縮小される空間部の容積が略最小となる位置の付近で、縮小された空間部と前記受容部とを連通する第１連通路を備えることを特徴とする請求項１から4のいずれかに記載の手持ち式動力作業機の駆動部品潤滑構造。   The communication path includes the reduced space portion and the receiving portion in a vicinity of a position where the volume of the space portion to be reduced among the space portions in the proximal-side accommodation portion that is changed by the movement of the driving component is substantially minimized. The drive part lubrication structure for a hand-held power working machine according to any one of claims 1 to 4, further comprising a first communication path communicating with the portion. 前記連通路は、前記駆動ギヤ及び前記従動ギヤの噛合い部近傍と前記受容部とを連通する第２連通路を備えることを特徴とする請求項１から５のいずれかに記載の手持ち式動力作業機の駆動部品潤滑構造。   The hand-held power according to any one of claims 1 to 5, wherein the communication path includes a second communication path that connects the vicinity of the meshing portion of the drive gear and the driven gear and the receiving portion. Lubrication structure for work machine drive parts.
JP2006216920A 2006-08-09 2006-08-09 Lubricating structure for driving parts of hand-held power work machines Expired - Fee Related JP4652298B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006216920A JP4652298B2 (en) 2006-08-09 2006-08-09 Lubricating structure for driving parts of hand-held power work machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006216920A JP4652298B2 (en) 2006-08-09 2006-08-09 Lubricating structure for driving parts of hand-held power work machines

Publications (2)

Publication Number Publication Date
JP2008035821A JP2008035821A (en) 2008-02-21
JP4652298B2 true JP4652298B2 (en) 2011-03-16

Family

ID=39171584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006216920A Expired - Fee Related JP4652298B2 (en) 2006-08-09 2006-08-09 Lubricating structure for driving parts of hand-held power work machines

Country Status (1)

Country Link
JP (1) JP4652298B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5205327B2 (en) 2009-03-31 2013-06-05 株式会社マキタ Lubrication structure of work equipment
JP2010242812A (en) * 2009-04-02 2010-10-28 Makita Corp Power transmission mechanism of working device
CN103181303B (en) * 2011-12-31 2016-01-20 侯巧生 A kind of electric high-branch chain saw
JP7081309B2 (en) * 2018-05-31 2022-06-07 工機ホールディングス株式会社 Reciprocating machine
US11926011B2 (en) 2018-06-08 2024-03-12 Koki Holdings Co., Ltd. Powered tool
CN114932847B (en) * 2022-04-01 2022-12-02 浙江万兆汽车零部件有限公司 Central horizontal driver assembly for automobile seat

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS489003Y1 (en) * 1968-08-13 1973-03-09
JPH02113055U (en) * 1989-02-28 1990-09-10
JPH0617434U (en) * 1992-08-14 1994-03-08 株式会社共立 Clipper brush cutter
JPH0754973A (en) * 1993-08-09 1995-02-28 Hitachi Constr Mach Co Ltd Power transmitting device
JPH0823780A (en) * 1994-07-15 1996-01-30 Maruyama Mfg Co Ltd Saw blade machine and pruning machine
JPH10136784A (en) * 1996-10-29 1998-05-26 Fa Andreas Stihl Hand working device provided with driving motor
JPH10159951A (en) * 1996-11-19 1998-06-16 Robert Bosch Gmbh Gear transmission device
JP2000217431A (en) * 1999-01-28 2000-08-08 Delta Kogyo Co Ltd Cam structure and cam device using the same and pruning machine using the cam device
JP2000308851A (en) * 1999-04-26 2000-11-07 Kawasaki Heavy Ind Ltd Impact generating device
JP2005027656A (en) * 2003-07-08 2005-02-03 ▲日▼翔 ▲黄▼ Gear box structure of horticultural implement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4910783B1 (en) * 1970-05-09 1974-03-13

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS489003Y1 (en) * 1968-08-13 1973-03-09
JPH02113055U (en) * 1989-02-28 1990-09-10
JPH0617434U (en) * 1992-08-14 1994-03-08 株式会社共立 Clipper brush cutter
JPH0754973A (en) * 1993-08-09 1995-02-28 Hitachi Constr Mach Co Ltd Power transmitting device
JPH0823780A (en) * 1994-07-15 1996-01-30 Maruyama Mfg Co Ltd Saw blade machine and pruning machine
JPH10136784A (en) * 1996-10-29 1998-05-26 Fa Andreas Stihl Hand working device provided with driving motor
JPH10159951A (en) * 1996-11-19 1998-06-16 Robert Bosch Gmbh Gear transmission device
JP2000217431A (en) * 1999-01-28 2000-08-08 Delta Kogyo Co Ltd Cam structure and cam device using the same and pruning machine using the cam device
JP2000308851A (en) * 1999-04-26 2000-11-07 Kawasaki Heavy Ind Ltd Impact generating device
JP2005027656A (en) * 2003-07-08 2005-02-03 ▲日▼翔 ▲黄▼ Gear box structure of horticultural implement

Also Published As

Publication number Publication date
JP2008035821A (en) 2008-02-21

Similar Documents

Publication Publication Date Title
JP4652298B2 (en) Lubricating structure for driving parts of hand-held power work machines
JP5205327B2 (en) Lubrication structure of work equipment
JP6302376B2 (en) Oil pump
US20050009659A1 (en) Gearbox for gardening machine
JP4374265B2 (en) Power unit
US11396055B2 (en) Reciprocating tool
JP4872684B2 (en) Fuel supply pump
JP4690752B2 (en) Lubrication structure of work equipment
CN207256162U (en) Power tool
US9644618B2 (en) Portable working machine
EP1743796A2 (en) Wheel motor device
CN105298781A (en) Variable capacity hydraulic device
WO2020203916A1 (en) Vehicle drive device
JP2006254785A (en) Lubrication structure of operation apparatus
JP2016023581A (en) Gear pump and motor
JP7179267B2 (en) Rotating part lubricator
JP3213356U (en) Internal gear pump
JP2010242812A (en) Power transmission mechanism of working device
JP7081309B2 (en) Reciprocating machine
JP3880982B2 (en) Oil pump device for lubricating the saw chain
US6742491B1 (en) Engine lubrication system
JP7374638B2 (en) Fluid machinery and construction machinery
JP2001095337A (en) Transverse feeding mechanism of seedling planting device
JP2007278512A (en) Balancing device for reciprocating piston engine
KR102465393B1 (en) Pump

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080701

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101126

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20101203

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20101215

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131224

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees