JP5783305B2 - Gear fluid device - Google Patents

Gear fluid device Download PDF

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Publication number
JP5783305B2
JP5783305B2 JP2014147177A JP2014147177A JP5783305B2 JP 5783305 B2 JP5783305 B2 JP 5783305B2 JP 2014147177 A JP2014147177 A JP 2014147177A JP 2014147177 A JP2014147177 A JP 2014147177A JP 5783305 B2 JP5783305 B2 JP 5783305B2
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Prior art keywords
gear
sliding contact
groove
fluid device
drive gear
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JP2015083831A (en
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克成 都築
克成 都築
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Daikin Industries Ltd
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Daikin Industries Ltd
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Priority to JP2014147177A priority Critical patent/JP5783305B2/en
Priority to EP14845988.6A priority patent/EP3048303B8/en
Priority to ES14845988T priority patent/ES2938841T3/en
Priority to CN201480048335.9A priority patent/CN105492774B/en
Priority to PCT/JP2014/071332 priority patent/WO2015040985A1/en
Priority to TW103131969A priority patent/TWI545265B/en
Publication of JP2015083831A publication Critical patent/JP2015083831A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/005—Removing contaminants, deposits or scale from the pump; Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0088—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2280/00—Arrangements for preventing or removing deposits or corrosion

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Valve Device For Special Equipments (AREA)

Description

この発明は、ギヤ流体装置に関する。   The present invention relates to a gear fluid device.

従来、ギヤ流体装置としては、互いに噛み合うドライブギヤおよびドリブンギヤを備え、ドライブギヤの側面とドリブンギヤの側面にサイドプレートの摺接面が摺接するギヤポンプがある(例えば、特開平８−１２１３５２号公報(特許文献１)、特開平６−３１７２６１号公報(特許文献２)参照)。   Conventionally, as a gear fluid device, there is a gear pump that includes a drive gear and a driven gear that mesh with each other, and a sliding contact surface of a side plate is in sliding contact with a side surface of the drive gear and a side surface of the driven gear (for example, Japanese Patent Laid-Open No. Hei 8-121352 (Patent) Document 1), Japanese Patent Laid-Open No. 6-317261 (Patent Document 2)).

上記ギヤポンプでは、ギヤ側面とそのギヤ側面に相対するハウジングとの間の隙間は、ポンプの内部漏れを減少させるため、狭い方が良い。この目的を達成するため、現在は圧力バランス型のサイドプレート(側板)やベアリングケースが採用され、積極的に隙間を狭くしている。   In the above gear pump, the gap between the gear side surface and the housing facing the gear side surface is preferably narrow in order to reduce internal leakage of the pump. In order to achieve this purpose, pressure-balance side plates (side plates) and bearing cases are currently used, and the gap is actively narrowed.

上記ギヤポンプにおいて、ギヤ側面での作動流体漏れは少ない方が良いが、漏れた作動流体は一部がギヤの軸受部へ流れ込み、軸受部の潤滑と冷却に役立っている。   In the gear pump, it is preferable that the working fluid leakage on the side surface of the gear is small. However, a part of the leaked working fluid flows into the bearing portion of the gear, which is useful for lubrication and cooling of the bearing portion.

図６,図７は従来の第１のギヤポンプのサイドプレート４０５の摺接面側から見た平面図を示し、図８は上記ギヤポンプの要部の断面図を示している。図６〜図８において、４０５a,４０５bは貫通穴、４１０はボディ、４３０はカバー、４３０aは戻り通路、４４０はガスケット、４５１,４５２は逃げ溝であり、同一構成部には同一参照番号を付している。なお、図８のサイドプレート４０５の断面は、図７のＡ−Ａ線から見た断面である。   6 and 7 are plan views as seen from the sliding contact surface side of the side plate 405 of the first conventional gear pump, and FIG. 8 is a cross-sectional view of the main part of the gear pump. 6 to 8, 405a and 405b are through holes, 410 is a body, 430 is a cover, 430a is a return passage, 440 is a gasket, 451 and 452 are escape grooves, and the same reference numerals are given to the same components. doing. In addition, the cross section of the side plate 405 in FIG.

また、図９は従来の第２のギヤポンプのサイドプレート５０５の摺接面側から見た平面図を示し、図１０は上記ギヤポンプの要部の断面図を示している。図９,図１０において、５０５a,５０５bは貫通穴、５１０はボディ、５３０はカバー、５３０aは戻り通路、５４０はガスケット、５５１,５５２は逃げ溝であり、同一構成部には同一参照番号を付している。なお、図１０のサイドプレート５０５の断面は、図９のＢ−Ｂ線から見た断面である。   FIG. 9 is a plan view seen from the sliding contact surface side of the side plate 505 of the conventional second gear pump, and FIG. 10 is a cross-sectional view of the main part of the gear pump. 9 and 10, 505a and 505b are through holes, 510 is a body, 530 is a cover, 530a is a return passage, 540 is a gasket, 551 and 552 are escape grooves, and the same reference numerals are given to the same components. doing. In addition, the cross section of the side plate 505 of FIG. 10 is a cross section seen from the BB line of FIG.

上述のとおり、高圧側から漏れた作動流体をなるべく多く軸受部に流入させるためには、図６に示すようなサイドプレート４０５の低圧側の逃げ溝４５１と回転軸の通る貫通穴４０５a,４０５bが連通していない摺接面の形状が望ましい。図８に示すように、ギヤ側面で漏れた作動流体のうちの一部は、軸受部４１３Ａに供給され(実線矢印で示す)、残りの作動流体は、サイドプレート４０５とカバー４３０の端面との隙間を介して低圧側に流れる(点線矢印で示す)。   As described above, in order to allow the working fluid leaking from the high pressure side to flow into the bearing portion as much as possible, the relief groove 451 on the low pressure side of the side plate 405 and the through holes 405a and 405b through which the rotation shaft passes as shown in FIG. The shape of the sliding contact surface not communicating is desirable. As shown in FIG. 8, a part of the working fluid leaking from the side surface of the gear is supplied to the bearing portion 413A (indicated by a solid line arrow), and the remaining working fluid flows between the side plate 405 and the end face of the cover 430. It flows to the low-pressure side through a gap (indicated by a dotted arrow).

しかしながら、図６に示す摺接面(斜線領域)の形状は、図７に示すように、ドライブギヤ４０１(図７に示す)およびドリブンギヤ４０２(図７に示す)の夫々の歯底径と各ギヤの回転軸が通る貫通穴４０５a,４０５bの径との間の領域Ｓ１,Ｓ２(図７に示す斜線領域)で、かつ、ドライブギヤ４０１の側面およびドリブンギヤ４０２の側面とサイドプレート４０５の摺接面との隙間に作動流体中の異物が入り込むと、隙間から抜け出すのが困難なため、ドライブギヤ４０１,ドリブンギヤ４０２とサイドプレート４０５との摺接面の内Ｓ１,Ｓ２の領域が磨耗しやすい。そのため、上記従来の第１のギヤポンプは、ギヤ側面での内部漏れが増大し、ポンプ性能が低下しやすいという欠点がある。   However, as shown in FIG. 7, the shape of the sliding contact surface (shaded area) shown in FIG. 6 is different from the respective root diameters of the drive gear 401 (shown in FIG. 7) and the driven gear 402 (shown in FIG. 7). The regions S1 and S2 (shaded regions shown in FIG. 7) between the diameters of the through holes 405a and 405b through which the rotation shaft of the gear passes, and the side surface of the drive gear 401 and the side surface of the driven gear 402 and the side plate 405 are in sliding contact. When foreign matter in the working fluid enters the gap with the surface, it is difficult to get out of the gap, and therefore the areas S1 and S2 in the sliding contact surfaces of the drive gear 401, the driven gear 402 and the side plate 405 are easily worn. For this reason, the conventional first gear pump has a drawback that internal leakage on the side surface of the gear increases and the pump performance tends to be lowered.

このポンプ性能の低下を防ぐためには、図９に示す従来の第２のギヤポンプのように、低圧側の逃げ溝５５１と貫通穴５０５a,５０５bを連通部５５１a,５５１bで連通させると良い。上記逃げ溝５５１の連通部５５１a,５５１bで作動流体中の異物がギヤ側面とサイドプレート５０５間の隙間から抜け出しやすくなり、摺接面の磨耗を防げるからである。   In order to prevent the deterioration of the pump performance, the low pressure side escape groove 551 and the through holes 505a and 505b are preferably communicated with each other through the communication portions 551a and 551b, as in the conventional second gear pump shown in FIG. This is because foreign matters in the working fluid easily escape from the gap between the side surface of the gear and the side plate 505 at the communication portions 551a and 551b of the escape groove 551, and wear of the sliding contact surface can be prevented.

ただし、上記従来の第２のギヤポンプは、図１０に示すように、ギヤ側面で漏れた作動流体のうち、軸受部５１３Ａを通らずに連通部５５１a,５５１b(図９に示す)を経由して低圧側へ戻るものが発生する(実線矢印で示す)。結果的に、軸受部５１３Ａへ流入する作動流体(点線矢印で示す)の量が減少し、軸受部５１３Ａの潤滑や冷却が悪くなり、軸受の損傷が起きやすくなる欠点がある。   However, as shown in FIG. 10, the conventional second gear pump does not pass through the bearing portion 513 </ b> A of the working fluid leaking from the side surface of the gear, but passes through the communication portions 551 a and 551 b (shown in FIG. 9). Some return to the low-pressure side occurs (indicated by solid arrows). As a result, the amount of working fluid (indicated by dotted arrows) flowing into the bearing portion 513A is reduced, and the lubrication and cooling of the bearing portion 513A are deteriorated, and the bearing is liable to be damaged.

前述のとおり、軸受部の潤滑や冷却を優先しようとすると、図６〜図８に示すようなサイドプレート形状を採用することになるが、ドライブギヤ,ドリブンギヤの側面とサイドプレートとの摺接面が磨耗しやすくなる。   As described above, when priority is given to lubrication and cooling of the bearing portion, the side plate shape as shown in FIGS. 6 to 8 is adopted, but the sliding contact surface between the side surface of the drive gear and the driven gear and the side plate. Becomes easy to wear.

これに対して、ドライブギヤ,ドリブンギヤの側面とサイドプレートとの摺接面の磨耗を防ぐために、図９,図１０に示す形態のようなサイドプレート形状を採用した場合は、軸受部の損傷が起きやすくなる。   On the other hand, when the side plate shape as shown in FIGS. 9 and 10 is employed in order to prevent the sliding contact surface between the side surface of the drive gear and the driven gear and the side plate, the bearing portion is damaged. It becomes easy to get up.

このように、上記従来の第１,第２のギヤポンプでは、軸受部の潤滑と摺接面の磨耗の防止を同時に実現することはできなかった。   As described above, the conventional first and second gear pumps described above cannot simultaneously realize lubrication of the bearing portion and prevention of wear of the sliding contact surface.

特開平８−１２１３５２号公報JP-A-8-121352 特開平６−３１７２６１号公報JP-A-6-317261

そこで、この発明の課題は、簡単な構成で軸受部の潤滑状態を保ちつつ摺接面の磨耗を効果的に防止することができるギヤ流体装置を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a gear fluid device that can effectively prevent wear of a sliding contact surface while maintaining a lubrication state of a bearing portion with a simple configuration.

上記課題を解決するため、この発明のギヤ流体装置は、
互いに噛み合うドライブギヤおよびドリブンギヤと、
上記ドライブギヤの側面と上記ドリブンギヤの側面に摺接する摺接面と、上記ドライブギヤと上記ドリブンギヤの各回転軸が挿入された回転軸用穴と、上記ドライブギヤと上記ドリブンギヤの噛み合い部分に形成される閉じ込み領域を低圧側および高圧側に夫々連通させる逃げ溝を有する摺接部材と、
上記摺接部材の摺接面に上記ドライブギヤおよび上記ドリブンギヤの歯底径よりも径方向内側かつ上記回転軸用穴よりも径方向外側に、上記回転軸用穴と上記逃げ溝とが連通しないように設けられた溝部または凹部と
を備え、
上記摺接部材の摺接面に、上記ドライブギヤおよび上記ドリブンギヤの歯底径よりも径方向外側から上記回転軸用穴に連通する溝部または凹部が存在しないことを特徴とする。 In order to solve the above problems, the gear fluid device of the present invention is
A drive gear and a driven gear meshing with each other;
The drive gear is formed in a side surface of the drive gear, a sliding contact surface that is in sliding contact with a side surface of the driven gear, a rotation shaft hole into which each rotation shaft of the drive gear and the driven gear is inserted, and a meshing portion of the drive gear and the driven gear. A sliding contact member having escape grooves for communicating the confined region to the low pressure side and the high pressure side,
The rotary shaft hole and the relief groove do not communicate with the sliding contact surface of the sliding member on the radially inner side of the root diameter of the drive gear and the driven gear and on the radially outer side of the rotary shaft hole. And provided with a groove or recess ,
The sliding contact surface of the sliding contact member is characterized in that there is no groove or recess that communicates with the rotary shaft hole from the radially outer side than the root diameter of the drive gear and the driven gear .

上記構成によれば、摺接部材(サイドプレート、ベアリングケース、または、ハウジングなど)の摺接面にドライブギヤの歯底径よりも径方向内側、かつ、ドライブギヤの回転軸が挿入された回転軸用穴よりも径方向外側に、回転軸用穴と逃げ溝とが連通しないように溝部または凹部を設けることによって、低圧側と回転軸用穴が連通することがないので、ドライブギヤの側面で漏れた作動流体が溝部または凹部を通って低圧側に戻ることがなくなる。これにより、ドライブギヤの側面で漏れてドライブギヤの回転軸用の軸受部に供給される作動流体の量が減少することがなくなり、軸受部を潤滑するのに十分な作動流体を軸受部に供給できる。また、ドライブギヤの歯底径とドライブギヤの回転軸用穴の内径の間の領域において、ドライブギヤの側面と摺接部材の摺接面との隙間に入り込んだ異物は、溝部または凹部に抜け落ちるので、摺接部材の摺接面の磨耗も防ぐことができる。   According to the above configuration, the rotation in which the rotational axis of the drive gear is inserted into the sliding contact surface of the sliding contact member (side plate, bearing case, or housing) radially inward from the root diameter of the drive gear. By providing a groove or recess so that the rotary shaft hole and the relief groove do not communicate with each other radially outside the shaft hole, the low pressure side and the rotary shaft hole do not communicate with each other. Thus, the working fluid leaked in step 3 does not return to the low-pressure side through the groove or recess. As a result, the amount of working fluid that leaks from the side surface of the drive gear and is supplied to the bearing portion for the rotating shaft of the drive gear is reduced, and sufficient working fluid is supplied to the bearing portion to lubricate the bearing portion. it can. In the region between the root diameter of the drive gear and the inner diameter of the rotation shaft hole of the drive gear, foreign matter that has entered the gap between the side surface of the drive gear and the sliding contact surface of the sliding contact member falls into the groove or recess. Therefore, wear of the sliding contact surface of the sliding contact member can also be prevented.

同様に、上記摺接部材の摺接面にドリブンギヤの歯底径よりも径方向内側、かつ、ドリブンギヤの回転軸が挿入された回転軸用穴よりも径方向外側に、回転軸用穴と逃げ溝とが連通しないように溝部または凹部を設けることによって、低圧側と回転軸用穴が連通することがないので、ドリブンギヤの側面で漏れた作動流体が溝部または凹部を通って低圧側に戻ることがなくなる。これにより、ドリブンギヤの側面で漏れてドリブンギヤの回転軸用の軸受部に供給される作動流体の量が減少することがなくなり、軸受部を潤滑するのに十分な作動流体を軸受部に供給できる。また、ドリブンギヤの歯底径とドリブンギヤの回転軸用穴の内径の間の領域において、ドリブンギヤの側面と摺接部材の摺接面との隙間に入り込んだ異物は、溝部または凹部に抜け落ちるので、摺接部材の摺接面の磨耗も防ぐことができる。   Similarly, the rotary shaft hole and the clearance are disposed on the sliding contact surface of the sliding contact member radially inward of the root diameter of the driven gear and radially outward of the rotational shaft hole into which the rotational shaft of the driven gear is inserted. By providing the groove or recess so as not to communicate with the groove, the low pressure side and the rotary shaft hole do not communicate with each other, so that the working fluid leaking on the side of the driven gear returns to the low pressure side through the groove or recess. Disappears. As a result, the amount of working fluid that leaks at the side of the driven gear and is supplied to the bearing portion for the rotary shaft of the driven gear is not reduced, and sufficient working fluid to lubricate the bearing portion can be supplied to the bearing portion. In addition, in the region between the root diameter of the driven gear and the inner diameter of the rotation shaft hole of the driven gear, foreign matter that has entered the gap between the side surface of the driven gear and the sliding contact surface of the sliding contact member falls out into the groove or recess, so Wear of the sliding contact surface of the contact member can also be prevented.

したがって、この発明よれば、簡単な構成で軸受部の潤滑状態を保ちつつ摺接面の磨耗を効果的に防止することができる。
また、一実施形態のギヤ流体装置では、
上記摺接部材の摺接面側から上記回転軸用穴に漏れた作動流体を、上記ドライブギヤと上記ドリブンギヤの各回転軸を回転自在に支持する軸受を介して低圧側に夫々案内する戻り通路を備えた。 Therefore, according to the present invention, it is possible to effectively prevent wear of the sliding contact surface while maintaining the lubrication state of the bearing portion with a simple configuration.
In one embodiment of the gear fluid device,
A return path for guiding the working fluid leaking from the sliding contact surface side of the sliding contact member to the rotary shaft hole to the low pressure side via bearings that rotatably support the rotary shafts of the drive gear and the driven gear. Equipped with.

また、一実施形態のギヤ流体装置では、
上記摺接部材は、上記ドライブギヤの両側面と上記ドリブンギヤの両側面を挟むように配置されたサイドプレートもしくはベアリングケース、または、上記ドライブギヤと上記ドリブンギヤが収納されたハウジングである。 In one embodiment of the gear fluid device,
The sliding contact member is a side plate or a bearing case arranged so as to sandwich both side surfaces of the drive gear and both side surfaces of the driven gear, or a housing in which the drive gear and the driven gear are accommodated.

また、一実施形態のギヤ流体装置では、
上記摺接部材の上記溝部または上記凹部が低圧側に設けられている。 In one embodiment of the gear fluid device,
The groove portion or the concave portion of the sliding contact member is provided on the low pressure side.

上記実施形態によれば、摺接部材(サイドプレート、ベアリングケース、または、ハウジングなど)の溝部または凹部を低圧側に設けることによって、高圧側の作動流体をドライブギヤ,ドリブンギヤの側面と摺接部材とでシールする面積を減らずとも済む。すなわち、ドライブギヤ,ドリブンギヤ側面における内部漏れが増加することがないため、ポンプ性能に悪影響を及ぼさない。   According to the above-described embodiment, the groove or recess of the sliding contact member (side plate, bearing case, or housing) is provided on the low pressure side, so that the working fluid on the high pressure side is in contact with the side surfaces of the drive gear and the driven gear and the sliding contact member. This eliminates the need to reduce the sealing area. That is, the internal leakage on the side surfaces of the drive gear and the driven gear does not increase, and the pump performance is not adversely affected.

また、一実施形態のギヤ流体装置では、
上記摺接部材の上記溝部または上記凹部が上記逃げ溝に連なるように設けられている。 In one embodiment of the gear fluid device,
The groove portion or the concave portion of the sliding contact member is provided so as to continue to the escape groove.

上記実施形態によれば、摺接部材(サイドプレート、ベアリングケース、または、ハウジングなど)の溝部(または凹部)を逃げ溝に連なるように設けることによって、ドライブギヤ,ドリブンギヤの側面と摺接部材の摺接面との隙間に入り込んで溝部(または凹部)に抜け落ちた異物は、作動流体と共に逃げ溝に流れ出るので、異物の除去が効果的に行える。   According to the above embodiment, by providing the groove (or recess) of the sliding contact member (side plate, bearing case, or housing) so as to continue to the escape groove, the side surfaces of the drive gear and the driven gear and the sliding contact member The foreign matter that has entered the gap with the sliding contact surface and has fallen into the groove (or recess) flows out into the escape groove together with the working fluid, so that the foreign matter can be effectively removed.

また、一実施形態のギヤ流体装置では、
上記摺接部材の上記溝部または上記凹部の少なくとも１つが上記逃げ溝に連なるように設けられ、
上記摺接部材の上記溝部または上記凹部の少なくとも他の１つが上記回転軸用穴に連なるように設けられている。 In one embodiment of the gear fluid device,
At least one of the groove or the recess of the sliding contact member is provided so as to be continuous with the escape groove;
At least another one of the groove portion or the concave portion of the sliding contact member is provided so as to be continuous with the rotation shaft hole.

上記実施形態によれば、摺接部材(サイドプレート、ベアリングケース、または、ハウジングなど)の溝部(または凹部)の少なくとも１つを逃げ溝に連なるように設けると共に、摺接部材の溝部(または凹部)の少なくとも他の１つを回転軸用穴に連なるように設けることによって、ドライブギヤ,ドリブンギヤの側面と摺接部材の摺接面との隙間に入り込んだ異物は、溝部(または凹部)に抜け落ちて、作動流体と共に逃げ溝と回転軸用穴の両方に流れ出るので、異物の除去がさらに効果的に行える。   According to the above embodiment, at least one groove (or recess) of the sliding contact member (side plate, bearing case, or housing) is provided so as to be continuous with the escape groove, and the groove (or recess) of the sliding contact member is provided. ) Is provided so as to be connected to the rotary shaft hole, so that foreign matter that has entered the gap between the side surface of the drive gear and driven gear and the sliding contact surface of the sliding contact member falls into the groove (or recess). Thus, the foreign matter can be removed more effectively because it flows out to both the escape groove and the rotary shaft hole together with the working fluid.

また、一実施形態のギヤ流体装置では、
上記摺接部材の上記逃げ溝に連なる上記溝部または上記凹部の少なくとも１つの径方向内側の端部は、上記摺接部材の上記回転軸用穴に連なる上記溝部または上記凹部の少なくとも１つの径方向外側の端部よりも径方向内側にある。 In one embodiment of the gear fluid device,
At least one radially inner end portion of the groove portion or the concave portion that is continuous with the relief groove of the sliding contact member is at least one radial direction of the groove portion or the concave portion that is continuous with the rotation shaft hole of the sliding contact member. It is radially inward from the outer end.

上記実施形態によれば、摺接部材(サイドプレート、ベアリングケース、または、ハウジングなど)の逃げ溝に連なる溝部(または凹部)の少なくとも１つの径方向内側の端部は、摺接部材の回転軸用穴に連なる溝部(または凹部)の少なくとも１つの径方向外側の端部よりも径方向内側にあることによって、逃げ溝に連なる溝部(または凹部)による異物の除去領域と、回転軸用穴に連なる溝部(または凹部)による異物の除去領域とがオーバーラップするので、摺接部材のドライブギヤおよびドリブンギヤの歯底径よりも径方向内側かつ回転軸用穴よりも径方向外側の領域に対向するドライブギヤの側面部分およびドリブンギヤの側面部分の異物を確実に除去することができる。   According to the above embodiment, at least one radially inner end of the groove (or recess) connected to the clearance groove of the sliding contact member (side plate, bearing case, or housing) is the rotational axis of the sliding contact member. By being radially inward of at least one radially outer end of the groove (or recess) connected to the service hole, a foreign matter removal region by the groove (or recess) connected to the escape groove and the rotation shaft hole Since the foreign matter removal region by the continuous groove (or recess) overlaps, it faces the region radially inward of the root diameter of the drive gear and driven gear of the sliding contact member and radially outward of the rotation shaft hole. Foreign matter on the side surface portion of the drive gear and the side surface portion of the driven gear can be reliably removed.

以上より明らかなように、この発明によれば、簡単な構成で軸受部の潤滑状態を保ちつつ摺接面の磨耗を効果的に防止することができるギヤ流体装置を実現することができる。   As is apparent from the above, according to the present invention, it is possible to realize a gear fluid device that can effectively prevent wear of the sliding contact surface while maintaining the lubrication state of the bearing portion with a simple configuration.

図１はこの発明の第１実施形態のギヤ流体装置の一例としてのギヤポンプの断面図である。FIG. 1 is a sectional view of a gear pump as an example of a gear fluid device according to a first embodiment of the present invention. 図２は上記ギヤポンプの第１サイドプレートの摺接面側から見た平面図である。FIG. 2 is a plan view seen from the sliding contact surface side of the first side plate of the gear pump. 図３はこの発明の第２実施形態のギヤ流体装置の一例としてのギヤポンプの第１サイドプレートの摺接面側から見た平面図である。FIG. 3 is a plan view seen from the sliding surface side of the first side plate of the gear pump as an example of the gear fluid device according to the second embodiment of the present invention. 図４はこの発明の第３実施形態のギヤ流体装置の一例としてのギヤポンプの断面図である。FIG. 4 is a cross-sectional view of a gear pump as an example of a gear fluid device according to a third embodiment of the present invention. 図５はこの発明の第４実施形態のギヤ流体装置の一例としてのギヤポンプの断面図である。FIG. 5 is a sectional view of a gear pump as an example of a gear fluid device according to a fourth embodiment of the present invention. 図６は従来の第１のギヤポンプのサイドプレートの摺接面側から見た平面図である。FIG. 6 is a plan view seen from the sliding surface side of the side plate of the conventional first gear pump. 図７は上記サイドプレートの摺接面側から見た平面図である。FIG. 7 is a plan view seen from the sliding surface side of the side plate. 図８は上記ギヤポンプの要部の断面図である。FIG. 8 is a cross-sectional view of a main part of the gear pump. 図９は従来の第２のギヤポンプのサイドプレートの摺接面側から見た平面図である。FIG. 9 is a plan view seen from the sliding contact surface side of the side plate of the second conventional gear pump. 図１０は上記ギヤポンプの要部の断面図である。FIG. 10 is a cross-sectional view of the main part of the gear pump.

以下、この発明のギヤ流体装置を図示の実施の形態により詳細に説明する。   The gear fluid device of the present invention will be described in detail below with reference to the illustrated embodiments.

〔第１実施形態〕
図１はこの発明の第１実施形態のギヤ流体装置の一例としてのギヤポンプの断面図を示している。 [First Embodiment]
FIG. 1 shows a cross-sectional view of a gear pump as an example of a gear fluid device according to a first embodiment of the present invention.

この第１実施形態のギヤポンプは、図１に示すように、軸が平行でかつ一部が重なり合う２つの円筒空間を有するボディ１０と、上記ボディ１０内に配置された平歯車であるドライブギヤ１(駆動ギヤ)と、上記ボディ１０内に配置され、ドライブギヤ１と互いに噛み合う平歯車であるドリブンギヤ２(従動ギヤ)とを備えている。上記ボディ１０に吸入ポート(図示せず)と吐出ポート(図示せず)を設けている。なお、上記ボディ１０には、鋳鉄,アルミニウム合金等を用いている。また、上記ドライブギヤ１とドリブンギヤ２には、浸炭焼入れ鋼等を用いている。   As shown in FIG. 1, the gear pump according to the first embodiment includes a body 10 having two cylindrical spaces whose axes are parallel and partially overlapping, and a drive gear 1 that is a spur gear disposed in the body 10. (Drive gear) and a driven gear 2 (driven gear) which is a spur gear which is disposed in the body 10 and meshes with the drive gear 1. The body 10 is provided with a suction port (not shown) and a discharge port (not shown). The body 10 is made of cast iron, aluminum alloy, or the like. The drive gear 1 and the driven gear 2 are made of carburized and hardened steel.

また、上記ボディ１０内にドライブギヤ１の両側面とドリブンギヤ２の両側面を挟むように、摺接部材の一例としての第１サイドプレート５と第２サイドプレート６を配置している。上記第１サイドプレート５と第２サイドプレート６の非摺接面側の高圧部面積が摺接面側の高圧部面積よりも若干広くなっており、摺接面がドライブギヤ１とドリブンギヤ２の側面に押し付けられて、隙間が極力狭くなるようにしている。図中左側の第１サイドプレート５の非摺接面とマウンティング２０間の隙間および図中右側の第２サイドプレート６の非摺接面とカバー３０間の隙間は、ガスケット４０にて高低圧を区画している。また、ボディ１０の図中左端をマウンティング２０により覆うと共に、ボディ１０の図中右側をカバー３０で覆っている。上記ボディ１０とマウンティング２０とカバー３０でハウジングを構成している。このハウジング内に、互いに噛み合う歯(図示せず)を有するドライブギヤ１とドリブンギヤ２を収納している。   Further, a first side plate 5 and a second side plate 6 as an example of a sliding contact member are arranged in the body 10 so as to sandwich both side surfaces of the drive gear 1 and both side surfaces of the driven gear 2. The high-pressure part area on the non-sliding contact side of the first side plate 5 and the second side plate 6 is slightly larger than the high-pressure part area on the sliding contact side, and the sliding contact surfaces of the drive gear 1 and the driven gear 2 are It is pressed against the side so that the gap is as narrow as possible. The gap between the non-sliding contact surface of the first side plate 5 on the left side of the drawing and the mounting 20 and the clearance between the non-sliding contact surface of the second side plate 6 on the right side of the drawing and the cover 30 are reduced by the gasket 40. It is partitioned. Further, the left end of the body 10 in the figure is covered with a mounting 20, and the right side of the body 10 in the figure is covered with a cover 30. The body 10, the mounting 20 and the cover 30 constitute a housing. A drive gear 1 and a driven gear 2 having teeth (not shown) that mesh with each other are housed in the housing.

上記ドライブギヤ１を駆動する第１回転軸１１の一端(図１中右側)は、カバー３０に軸受１３Ａを介して回転自在に支持され、第１回転軸１１の他端(図１中左側)は、カバー３０に軸受１３Ｂを介して回転自在に支持されている。上記第１回転軸１１の他端側の連結部１１aがマウンティング２０から突出し、その連結部１１aに図示しないモータの駆動軸が連結される。また、上記ドリブンギヤ２の第２回転軸１２の一端(図１中右側)は、カバー３０に軸受１４Ａを介して回転自在に支持され、第２回転軸１２の他端(図１中左側)は、マウンティング２０に軸受１４Ｂを介して回転自在に支持されている。図１において、１５はオイルシールである。   One end (right side in FIG. 1) of the first rotating shaft 11 that drives the drive gear 1 is rotatably supported by the cover 30 via a bearing 13A, and the other end (left side in FIG. 1) of the first rotating shaft 11. Is rotatably supported by the cover 30 via a bearing 13B. A connecting portion 11a on the other end side of the first rotating shaft 11 protrudes from the mounting 20, and a driving shaft of a motor (not shown) is connected to the connecting portion 11a. Further, one end (right side in FIG. 1) of the second rotating shaft 12 of the driven gear 2 is rotatably supported by the cover 30 via a bearing 14A, and the other end (left side in FIG. 1) of the second rotating shaft 12 is supported. The mounting 20 is rotatably supported via a bearing 14B. In FIG. 1, 15 is an oil seal.

また、図２は上記ギヤポンプの第１サイドプレート５の摺接面側から見た平面図を示している。なお、第２サイドプレート６も第１サイドプレート５と同様の構成をしている。   FIG. 2 is a plan view of the gear pump as viewed from the sliding contact surface side of the first side plate 5. The second side plate 6 has the same configuration as the first side plate 5.

図２に示すように、８の字形状の第１サイドプレート５は、第１回転軸１１(図１に示す)が挿入された回転軸用穴の一例としての貫通穴５aと、第２回転軸１２(図１に示す)が挿入された回転軸用穴の一例としての貫通穴５bと、ドライブギヤ１とドリブンギヤ２の噛み合い部分の近傍から低圧室側に延びる逃げ溝５１と、ドライブギヤ１とドリブンギヤ２の噛み合い部分の近傍から高圧室側に延びる逃げ溝５２とを有する。   As shown in FIG. 2, the first side plate 5 having an 8-shaped shape includes a through hole 5a as an example of a rotation shaft hole into which a first rotation shaft 11 (shown in FIG. 1) is inserted, and a second rotation. A through hole 5b as an example of a rotary shaft hole into which the shaft 12 (shown in FIG. 1) is inserted, a clearance groove 51 extending from the vicinity of the meshing portion of the drive gear 1 and the driven gear 2 to the low pressure chamber side, and the drive gear 1 And a relief groove 52 extending from the vicinity of the meshing portion of the driven gear 2 to the high-pressure chamber side.

上記逃げ溝５１は、ドライブギヤ１とドリブンギヤ２の噛み合い部分の近傍で第１,第２サイドプレート５,６とドライブギヤ１とドリブンギヤ２の各歯で形成される作動流体の閉込み領域(第１サイドプレート５の中央部分)が膨張されて低圧になるときに、低圧側から閉込み領域に作動流体を供給して、閉込み領域が負圧になることを防止する。一方、逃げ溝５２は、上記閉込み領域が、ドライブギヤ１とドリブンギヤ２の回転に伴って収縮されるときに、上記閉込み領域内の高圧の作動流体を高圧側に逃がして、閉込み領域内での高圧発生を防止する。   The relief groove 51 is a confining region of the working fluid formed by the teeth of the first and second side plates 5, 6, the drive gear 1 and the driven gear 2 in the vicinity of the meshing portion of the drive gear 1 and the driven gear 2 (first When the center portion of the 1 side plate 5 is expanded to a low pressure, the working fluid is supplied from the low pressure side to the confining region to prevent the confining region from becoming a negative pressure. On the other hand, the escape groove 52 allows the high-pressure working fluid in the confinement region to escape to the high-pressure side when the confinement region is contracted as the drive gear 1 and the driven gear 2 rotate. Prevents the generation of high pressure inside.

そして、第１サイドプレート５の逃げ溝５１に連通し、かつ、ドライブギヤ１の歯底径(Ｃ１１に示す)よりも半径方向内側に延び、貫通穴５aに達しない溝部５３を形成している。この溝部５３は、中間径(Ｃ１２に示す)よりも半径方向内側に延びている。また、第１サイドプレート５の貫通穴５aに連通し、かつ、中間径(Ｃ１２に示す)よりも半径方向外側に延びる溝部５５を形成している。この溝部５５は、逃げ溝５１に連通していない。ここで、上記中間径(Ｃ１２に示す)は、ドライブギヤ１の歯底径と貫通穴５aの内径の和の１／２の直径である。   A groove 53 is formed which communicates with the clearance groove 51 of the first side plate 5 and extends radially inward from the root diameter (shown by C11) of the drive gear 1 and does not reach the through hole 5a. . The groove 53 extends radially inward from the intermediate diameter (shown in C12). Further, a groove portion 55 is formed which communicates with the through hole 5a of the first side plate 5 and extends radially outward from the intermediate diameter (shown as C12). The groove portion 55 does not communicate with the escape groove 51. Here, the intermediate diameter (shown in C12) is a half of the sum of the root diameter of the drive gear 1 and the inner diameter of the through hole 5a.

つまり、第１サイドプレート５の逃げ溝５１に連なる溝部５３の径方向内側の端部は、第１サイドプレート５の貫通穴５aに連なる溝部５５の径方向外側の端部よりも径方向内側にある。   That is, the radially inner end portion of the groove portion 53 connected to the relief groove 51 of the first side plate 5 is radially inward of the radially outer end portion of the groove portion 55 connected to the through hole 5a of the first side plate 5. is there.

一方、第１サイドプレート５の逃げ溝５１に連通し、かつ、ドリブンギヤ２の歯底径(Ｃ２１に示す)よりも半径方向内側に延び、貫通穴５bに達しない溝部５４を形成している。この溝部５４は、中間径(Ｃ２２に示す)よりも半径方向内側に延びている。また、第１サイドプレート５の貫通穴５bに連通し、かつ、中間径(Ｃ２２に示す)よりも半径方向外側に延びる溝部５６を形成している。この溝部５６は、逃げ溝５１に連通していない。ここで、上記中間径(Ｃ２２に示す)は、ドリブンギヤ２の歯底径と貫通穴５bの内径の和の１／２の直径である。   On the other hand, a groove portion 54 is formed which communicates with the clearance groove 51 of the first side plate 5 and extends radially inward from the root diameter (shown by C21) of the driven gear 2 and does not reach the through hole 5b. The groove 54 extends radially inward from the intermediate diameter (shown in C22). Further, a groove portion 56 is formed which communicates with the through hole 5b of the first side plate 5 and extends radially outward from the intermediate diameter (shown as C22). The groove portion 56 does not communicate with the escape groove 51. Here, the intermediate diameter (shown in C22) is a half of the sum of the root diameter of the driven gear 2 and the inner diameter of the through hole 5b.

つまり、第１サイドプレート５の逃げ溝５１に連なる溝部５４の径方向内側の端部は、第１サイドプレート５の貫通穴５bに連なる溝部５６の径方向外側の端部よりも径方向内側にある。   That is, the radially inner end portion of the groove portion 54 connected to the relief groove 51 of the first side plate 5 is radially inward from the radially outer end portion of the groove portion 56 connected to the through hole 5b of the first side plate 5. is there.

第１サイドプレート５の低圧側の逃げ溝５１から第１回転軸１１用の貫通穴５aに向けて延びた溝部５３を形成し、貫通穴５aに至る途中で止めている。他方、貫通穴５aからも低圧側の逃げ溝５１に向けて溝部５５を形成しているが、逃げ溝５１に至る途中で止めている。   A groove portion 53 extending from the escape groove 51 on the low-pressure side of the first side plate 5 toward the through hole 5a for the first rotating shaft 11 is formed and stopped on the way to the through hole 5a. On the other hand, the groove portion 55 is also formed from the through hole 5 a toward the low pressure side escape groove 51, but is stopped on the way to the escape groove 51.

同様に、第１サイドプレート５の低圧側の逃げ溝５１から第２回転軸１２用の貫通穴５bに向けて延びた溝部５４を形成し、貫通穴５bに至る途中で止めている。他方、貫通穴５bからも低圧側の逃げ溝５２に向けて溝部５６を形成しているが、逃げ溝５２に至る途中で止めている。   Similarly, a groove portion 54 extending from the escape groove 51 on the low pressure side of the first side plate 5 toward the through hole 5b for the second rotating shaft 12 is formed and stopped in the middle of reaching the through hole 5b. On the other hand, the groove portion 56 is also formed from the through hole 5b toward the low pressure side escape groove 52, but is stopped on the way to the escape groove 52.

これにより、溝部５３,５５が歯底径(Ｃ１１,Ｃ２１に示す)の径方向内側かつ貫通穴５aの内径よりも径方向外側の環状領域に存在し、溝部５４,５６が歯底径の径方向内側かつ貫通穴５bの内径よりも径方向外側の環状領域に存在するようにしている。つまり、第１,第２サイドプレート５,６の逃げ溝５１に連なる溝部５３,５４の径方向内側の端部を、第１,第２サイドプレート５,６の貫通穴５a,５bに連なる溝部５５,５６の径方向外側の端部よりも径方向内側にしている。これによって、各環状領域内のどの位置に挟まった異物も、溝部５３,５４または溝部５５,５６のいずれかに抜け落ちる。   Thereby, the groove parts 53 and 55 exist in the annular region radially inward of the tooth root diameter (shown in C11 and C21) and radially outside the inner diameter of the through hole 5a, and the groove parts 54 and 56 have the diameter of the tooth root diameter. It exists in the annular region that is radially inward and radially outward of the inner diameter of the through hole 5b. That is, the radially inner ends of the groove portions 53 and 54 connected to the relief grooves 51 of the first and second side plates 5 and 6 are connected to the through holes 5a and 5b of the first and second side plates 5 and 6. It is on the radially inner side from the radially outer ends of 55 and 56. As a result, the foreign matter sandwiched at any position in each annular region falls into either the groove 53 or 54 or the groove 55 or 56.

上記構成のギヤポンプによれば、第１,第２サイドプレート５,６(摺接部材)のドライブギヤ１の歯底径よりも径方向内側、かつ、ドライブギヤ１の第１回転軸１１が挿通された貫通穴５aよりも径方向外側に、貫通穴５aと逃げ溝５１とが連通しないように溝部５３,５５を設けると共に、第１,第２サイドプレート５,６(摺接部材)のドリブンギヤ２の歯底径よりも径方向内側、かつ、ドリブンギヤ２の第２回転軸１２が挿通された貫通穴５bよりも径方向外側に、貫通穴５bと逃げ溝５１とが連通しないように溝部５４,５６を設けることによって、低圧側と貫通穴５a,５bとが連通することがないので、ドライブギヤ１,ドリブンギヤ２の側面で漏れた作動流体が溝部５３,５４,５５,５６を通って低圧側に戻ることがなくなる。これにより、ドライブギヤ１,ドリブンギヤ２の側面で漏れて第１,第２回転軸１１,１２用の軸受１３Ａ,１３Ｂ,１４Ａ,１４Ｂに供給される作動流体の量が減少することがなく、潤滑するのに十分な作動流体を軸受１３Ａ,１３Ｂ,１４Ａ,１４Ｂに供給できる。   According to the gear pump having the above-described configuration, the first and second side plates 5 and 6 (sliding contact members) are radially inward of the root diameter of the drive gear 1 and the first rotating shaft 11 of the drive gear 1 is inserted. Grooves 53 and 55 are provided on the radially outer side of the formed through hole 5a so that the through hole 5a and the escape groove 51 do not communicate with each other, and the driven gears of the first and second side plates 5 and 6 (sliding contact members) are provided. The groove portion 54 prevents the through hole 5b and the escape groove 51 from communicating with each other radially inward of the root diameter of the tooth 2 and radially outward of the through hole 5b through which the second rotating shaft 12 of the driven gear 2 is inserted. , 56 does not allow the low pressure side and the through holes 5a, 5b to communicate with each other, so that the working fluid leaking on the side surfaces of the drive gear 1 and the driven gear 2 passes through the grooves 53, 54, 55, 56. It will not return to the side. As a result, the amount of working fluid that leaks from the side surfaces of the drive gear 1 and the driven gear 2 and is supplied to the bearings 13A, 13B, 14A, and 14B for the first and second rotating shafts 11 and 12 is reduced. Sufficient working fluid can be supplied to the bearings 13A, 13B, 14A, 14B.

また、ドライブギヤ１の歯底径(Ｃ１１に示す)の径方向内側かつ貫通穴５aの内径よりも径方向外側の環状領域およびドリブンギヤ２の歯底径(Ｃ２１に示す) の径方向内側かつ貫通穴５bの内径よりも径方向外側の環状領域において、ドライブギヤ１,ドリブンギヤ２の側面と第１,第２サイドプレート５,６の摺接面である側面との隙間に入り込んだ異物は、溝部５３,５４,５５,５６に抜け落ちるので、ドライブギヤ１,ドリブンギヤ２と第１,第２サイドプレート５,６との摺接面の上記環状領域での磨耗も防ぐことができる。   Further, an annular region radially inward of the root diameter of the drive gear 1 (shown in C11) and radially outside of the inner diameter of the through-hole 5a and the inside of the driven gear 2 in the radial direction and through the root diameter of the driven gear 2 (shown in C21). In the annular region radially outside the inner diameter of the hole 5b, the foreign matter that has entered the gap between the side surface of the drive gear 1 and driven gear 2 and the side surface that is the sliding contact surface of the first and second side plates 5 and 6 53, 54, 55, 56, it is possible to prevent wear in the annular region of the sliding contact surface between the drive gear 1, driven gear 2 and the first and second side plates 5, 6.

したがって、この第１実施形態のギヤポンプよれば、簡単な構成で軸受部の潤滑状態を保ちつつ摺接面の磨耗を効果的に防止することができる。   Therefore, according to the gear pump of the first embodiment, it is possible to effectively prevent wear of the sliding contact surface while maintaining the lubrication state of the bearing portion with a simple configuration.

また、上記第１,第２サイドプレート５,６の溝部５３,５４,５５,５６を低圧側に設けることによって、高圧側の作動流体をドライブギヤ１,ドリブンギヤ２の側面と第１,第２サイドプレート５,６とでシールする面積を減らさずとも済む。すなわち、ドライブギヤ１,ドリブンギヤ２の側面における内部漏れが増加することがないため、ポンプ性能に悪影響を及ぼさない。   Further, by providing the groove portions 53, 54, 55, 56 of the first and second side plates 5, 6 on the low pressure side, the working fluid on the high pressure side is connected to the side surfaces of the drive gear 1, driven gear 2 and the first, second side. It is not necessary to reduce the area to be sealed with the side plates 5 and 6. That is, the internal leakage at the side surfaces of the drive gear 1 and the driven gear 2 does not increase, and the pump performance is not adversely affected.

また、上記第１,第２サイドプレート５,６の溝部５３,５４を逃げ溝５１に連なるように設けることによって、ドライブギヤ１,ドリブンギヤ２の側面と第１,第２サイドプレート５,６の摺接面である側面との隙間に入り込んで溝部５３,５４に抜け落ちた異物は、作動流体と共に逃げ溝５１に流れ出るので、異物の除去がより効果的に行える。   Further, by providing the groove portions 53 and 54 of the first and second side plates 5 and 6 so as to continue to the escape groove 51, the side surfaces of the drive gear 1 and the driven gear 2 and the first and second side plates 5 and 6 are connected. The foreign matter that has entered the gap with the side surface that is the sliding contact surface and has fallen into the groove portions 53 and 54 flows into the escape groove 51 together with the working fluid, so that the foreign matter can be removed more effectively.

また、上記第１,第２サイドプレート５,６の溝部５３,５４を逃げ溝５１に連なるように設けると共に、第１,第２サイドプレート５,６の溝部５５,５６を貫通穴５a,５bに連なるように設けることによって、ドライブギヤ１,ドリブンギヤ２の側面と第１,第２サイドプレート５,６の摺接面である側面との隙間に入り込んで溝部５３,５４,５５,５６に抜け落ちた異物は、作動流体と共に逃げ溝５１,５２と貫通穴５a,５bの両方に流れ出るので、異物の除去がさらに効果的に行える。   Further, the groove portions 53 and 54 of the first and second side plates 5 and 6 are provided so as to continue to the escape groove 51, and the groove portions 55 and 56 of the first and second side plates 5 and 6 are formed through the through holes 5a and 5b. Are provided so as to be connected to the side surfaces of the drive gear 1 and the driven gear 2 and the side surfaces which are the sliding contact surfaces of the first and second side plates 5 and 6 and fall into the grooves 53, 54, 55 and 56. Since the foreign matter flows out to both the escape grooves 51 and 52 and the through holes 5a and 5b together with the working fluid, the foreign matter can be more effectively removed.

また、上記第１,第２サイドプレート５,６の逃げ溝５１に連なる溝部５３,５４の径方向内側の端部は、第１,第２サイドプレート５,６の貫通穴５a,５bに連なる溝部５５,５６の径方向外側の端部よりも径方向内側にあることによって、逃げ溝５１に連なる溝部５３による異物除去領域と、貫通穴５aに連なる溝部５５による異物除去領域とがオーバーラップすると共に、逃げ溝５１に連なる溝部５４による異物除去領域と、貫通穴５bに連なる溝部５６による異物除去領域とがオーバーラップするので、第１,第２サイドプレート５,６のドライブギヤ１,ドリブンギヤ２の歯底径よりも径方向内側かつ貫通穴５a,５bよりも径方向外側の環状領域に対向するドライブギヤ１の側面部分およびドリブンギヤ２の側面部分の異物を確実に除去することができる。   Further, the radially inner ends of the groove portions 53, 54 connected to the relief grooves 51 of the first and second side plates 5, 6 are connected to the through holes 5 a, 5 b of the first and second side plates 5, 6. Due to being radially inward of the radially outer ends of the grooves 55 and 56, the foreign matter removal area formed by the groove 53 connected to the escape groove 51 and the foreign substance removal area formed by the groove 55 connected to the through hole 5a overlap each other. At the same time, the foreign matter removal region by the groove portion 54 connected to the escape groove 51 and the foreign matter removal region by the groove portion 56 connected to the through hole 5b overlap, so that the drive gear 1 and the driven gear 2 of the first and second side plates 5, 6 are overlapped. It is possible to reliably remove foreign matters on the side surface portion of the drive gear 1 and the side surface portion of the driven gear 2 that are opposed to the annular region radially inward of the tooth bottom diameter and radially outward of the through holes 5a and 5b. That.

上記第１実施形態では、摺接部材としての第１,第２サイドプレート５,６に、回転軸用穴としての貫通穴５a,５bまたは逃げ溝５１,５２の一方にのみ連通する溝部５３,５４,５５,５６を設けたが、溝部の本数は限定されない。   In the first embodiment, the first and second side plates 5 and 6 as the sliding contact members are connected to the through holes 5a and 5b as the rotation shaft holes or the groove portions 53 and 52 that communicate only with one of the escape grooves 51 and 52. Although 54, 55, and 56 are provided, the number of grooves is not limited.

また、溝部に限らず、摺接部材としての第１,第２サイドプレート５,６の歯底径の径方向内側かつ回転軸用穴としての貫通穴５a,５bの内径よりも径方向外側の環状領域内に凹部を設けてもよい。この凹部は、回転軸用穴または逃げ溝の一方に連通してもよいし、回転軸用穴または逃げ溝のいずれにも連通しなくてもよい。この場合、上記摺接部材の凹部内に、ドライブギヤ,ドリブンギヤの側面と摺接部材の摺接面との隙間に入り込んだ異物が抜け落ちる。   In addition to the groove portion, the first and second side plates 5 and 6 serving as sliding members are radially inward of the root diameters of the first and second side plates 5 and 6 and radially outer than the inner diameters of the through holes 5a and 5b serving as rotation shaft holes. A recess may be provided in the annular region. The concave portion may communicate with one of the rotation shaft hole or the escape groove or may not communicate with either the rotation shaft hole or the escape groove. In this case, the foreign matter that has entered the gap between the side surfaces of the drive gear and the driven gear and the sliding contact surface of the sliding contact member falls into the recess of the sliding contact member.

また、上記第１実施形態では、第１,第２サイドプレート５,６の逃げ溝５１に連なる溝部５３,５４の径方向内側の端部を、第１,第２サイドプレート５,６の貫通穴５a,５bに連なる溝部５５,５６の径方向外側の端部よりも径方向内側にして、逃げ溝５１に連なる溝部５３による異物除去領域と、貫通穴５aに連なる溝部５５による異物除去領域とがオーバーラップすると共に、逃げ溝５１に連なる溝部５４による異物除去領域と、貫通穴５bに連なる溝部５６による異物除去領域とがオーバーラップするようにしたが、この発明は、逃げ溝に連なる溝部(または凹部)による異物除去領域と、貫通穴に連なる溝部(または凹部)による異物除去領域とがオーバーラップしないで近接するものでもよい。   In the first embodiment, the end portions on the radially inner side of the groove portions 53, 54 connected to the relief groove 51 of the first and second side plates 5, 6 are passed through the first and second side plates 5, 6. A foreign matter removal region by the groove portion 53 that is continuous with the escape groove 51 and a foreign matter removal region by the groove portion 55 that is continuous with the through hole 5a, radially inward from the radially outer ends of the groove portions 55 and 56 that are continuous with the holes 5a and 5b. The foreign matter removal region by the groove portion 54 connected to the escape groove 51 and the foreign matter removal region by the groove portion 56 connected to the through hole 5b overlap each other, but the present invention provides a groove portion ( Alternatively, the foreign matter removal region formed by the concave portion and the foreign matter removal region formed by the groove portion (or the concave portion) connected to the through hole may be adjacent to each other without overlapping.

〔第２実施形態〕
図３はこの発明の第２実施形態のギヤ流体装置の一例としてのギヤポンプの第１サイドプレート１０５の摺接面側から見た平面図を示している。この第２実施形態のギヤポンプは、サイドプレートの溝部を除いて第１実施形態のギヤポンプと同一の構成をしており、図１を援用する。なお、第２サイドプレートも第１サイドプレート１０５と同様の構成をしている。 [Second Embodiment]
FIG. 3 is a plan view of the gear pump as an example of the gear fluid device according to the second embodiment of the present invention as viewed from the sliding contact surface side of the first side plate 105. The gear pump of the second embodiment has the same configuration as the gear pump of the first embodiment except for the groove portion of the side plate, and FIG. Note that the second side plate has the same configuration as the first side plate 105.

図３に示すように、８の字形状の第１サイドプレート１０５は、第１回転軸１１(図１に示す)が貫通する回転軸用穴の一例としての貫通穴１０５aと、第２回転軸１２(図１に示す)が貫通する回転軸用穴の一例としての貫通穴１０５bと、ドライブギヤ１(図１に示す)とドリブンギヤ２(図１に示す)の噛み合い位置の近傍から低圧室側に延びる逃げ溝１５１と、ドライブギヤ１とドリブンギヤ２の噛み合い位置の近傍から高圧室側に延びる逃げ溝１５２とを有する。   As shown in FIG. 3, the first figure-shaped first side plate 105 includes a through hole 105 a as an example of a rotary shaft hole through which the first rotary shaft 11 (shown in FIG. 1) passes, and a second rotary shaft. 12 (shown in FIG. 1) through-hole 105b as an example of a rotary shaft hole through which the low-pressure chamber is located from the vicinity of the meshing position of drive gear 1 (shown in FIG. 1) and driven gear 2 (shown in FIG. 1) And a clearance groove 152 extending from the vicinity of the meshing position of the drive gear 1 and the driven gear 2 to the high-pressure chamber side.

そして、第１サイドプレート１０５の低圧側の逃げ溝１５１に連通し、かつ、逃げ溝１５１から回転軸用の貫通穴１０５aに向けて貫通穴１０５a近傍まで延びた溝部１５３を形成している。   A groove portion 153 is formed which communicates with the low pressure side escape groove 151 of the first side plate 105 and extends from the escape groove 151 toward the through hole 105a for the rotating shaft to the vicinity of the through hole 105a.

一方、第１サイドプレート１０５の低圧側の逃げ溝１５１に連通し、かつ、逃げ溝１５１から回転軸用の貫通穴１０５bに向けて貫通穴１０５b近傍まで延びた溝部１５４を形成している。   On the other hand, a groove portion 154 is formed which communicates with the escape groove 151 on the low pressure side of the first side plate 105 and extends from the escape groove 151 toward the through hole 105b for the rotating shaft to the vicinity of the through hole 105b.

これにより、溝部１５３が歯底径(Ｃ１１１)の径方向内側かつ貫通穴１０５aの内径よりも径方向外側の領域にほぼ存在し、溝部１５４が歯底径(Ｃ１２１)の径方向内側かつ貫通穴１０５bの内径よりも径方向外側の領域にほぼ存在するようにしているので、歯底径から径方向内側に向かって貫通穴１０５a,１０５bまでのほとんどの範囲の位置に挟まっている異物が溝部１５３,１５４に抜け落ちる。   As a result, the groove portion 153 is substantially present in a region radially inward of the root diameter (C111) and radially outside the inner diameter of the through hole 105a, and the groove portion 154 is radially inward of the root diameter (C121) and the through hole. Since it is made to exist in the area | region outside radial direction rather than the internal diameter of 105b, the foreign material currently pinched | interposed into the position of most ranges from the root diameter to the through-holes 105a and 105b toward the radial inside is the groove part 153. , 154 falls out.

上記第２実施形態のギヤポンプは、第１実施形態のギヤポンプと同様に、簡単な構成で軸受部の潤滑状態を保ちつつ摺接面の磨耗を効果的に防止することができる。   Similar to the gear pump of the first embodiment, the gear pump of the second embodiment can effectively prevent wear of the sliding contact surface while maintaining the lubrication state of the bearing portion with a simple configuration.

上記構成のギヤポンプでは、貫通穴１０５a,１０５bの周辺に入り込んだ異物は抜け落ちず、該当箇所の磨耗は防げないが、溝部１５３,１５４が存在する環状領域の磨耗は防げるので、第１実施形態には及ばないながらも十分な効果が得られる。この第２実施形態のギヤポンプは、溝部を形成する手間とポンプの性能低下防止の効果を勘案して実施され得る。   In the gear pump configured as described above, foreign matter that has entered the periphery of the through holes 105a and 105b does not fall out, and wear of the corresponding portions cannot be prevented, but wear of the annular region where the grooves 153 and 154 exist can be prevented. A sufficient effect can be obtained though it is not. The gear pump according to the second embodiment can be implemented in consideration of the labor for forming the groove and the effect of preventing the pump performance from being deteriorated.

また、上記第２実施形態によれば、溝部１５３,１５４が貫通穴１０５a,１０５bに連通しないので、軸受１３Ａ,１３Ｂ,１４Ａ,１４Ｂ(図１に示す)に異物が流入することがなく、異物による軸受の損傷を防ぐことができる。   Further, according to the second embodiment, since the grooves 153 and 154 do not communicate with the through holes 105a and 105b, the foreign matters do not flow into the bearings 13A, 13B, 14A, and 14B (shown in FIG. 1). Can prevent damage to the bearing.

上記第２実施形態では、摺接部材としての第１サイドプレート１０５と第２サイドプレートに、貫通穴１０５a,１０５b(回転軸用穴)または逃げ溝１５１,１５２の一方にのみ連通する溝部１５３,１５４を設けたが、溝部の本数は限定されない。   In the second embodiment, the first side plate 105 as the sliding contact member and the second side plate have grooves 153, which communicate with only one of the through holes 105 a, 105 b (rotating shaft holes) or the escape grooves 151, 152. Although 154 is provided, the number of grooves is not limited.

また、溝部に限らず、摺接部材の歯底径の径方向内側かつ貫通穴１０５a,１０５bの内径よりも径方向外側の環状領域内に凹部を設けてもよい。この凹部は、回転軸用穴または逃げ溝の一方に連通してもよいし、回転軸用穴または逃げ溝のいずれにも連通しなくてもよい。この場合、上記摺接部材の凹部内に、ドライブギヤ,ドリブンギヤの側面と摺接部材の摺接面との隙間に入り込んだ異物が抜け落ちる。   Moreover, you may provide a recessed part not only in a groove part but in the annular area | region of the radial inside rather than the internal diameter of the through-hole 105a, 105b not only in the radial direction inner diameter of the sliding contact member. The concave portion may communicate with one of the rotation shaft hole or the escape groove or may not communicate with either the rotation shaft hole or the escape groove. In this case, the foreign matter that has entered the gap between the side surfaces of the drive gear and the driven gear and the sliding contact surface of the sliding contact member falls into the recess of the sliding contact member.

上記第１,２実施形態以外にも、第１,第２サイドプレート(摺接部材)の高圧側に溝部または凹部を形成しても同様の効果が得られる。   In addition to the first and second embodiments, the same effect can be obtained by forming a groove or a recess on the high pressure side of the first and second side plates (sliding contact members).

〔第３実施形態〕
図４はこの発明の第３実施形態のギヤ流体装置の一例としてのギヤポンプの断面図を示している。 [Third Embodiment]
FIG. 4 is a sectional view of a gear pump as an example of a gear fluid device according to a third embodiment of the present invention.

この第３実施形態のギヤポンプは、図４に示すように、軸が平行でかつ一部が重なり合う２つの円筒空間を有するボディ２１０と、上記ボディ２１０内に所定の間隔をあけて配置された摺接部材の一例としての２つのベアリングケース２２０,２２０と、そのベアリングケース２２０,２２０間に配置された平歯車であるドライブギヤ２０１(駆動ギヤ)と、ベアリングケース２２０,２２０間に配置され、ドライブギヤ２０１と互いに噛み合う平歯車であるドリブンギヤ２０２(従動ギヤ)とを備えている。上記ボディ２１０に吸入ポート(図示せず)と吐出ポート(図示せず)を設けている。   As shown in FIG. 4, the gear pump according to the third embodiment includes a body 210 having two cylindrical spaces whose axes are parallel and partially overlapped, and a slide disposed within the body 210 at a predetermined interval. Two bearing cases 220 and 220 as an example of contact members, a drive gear 201 (drive gear) which is a spur gear disposed between the bearing cases 220 and 220, and a drive gear 201 disposed between the bearing cases 220 and 220. A driven gear 202 (driven gear) that is a spur gear that meshes with the gear 201 is provided. The body 210 is provided with a suction port (not shown) and a discharge port (not shown).

また、上記ベアリングケース２２０,２２０の非摺接面の高圧部面積が摺接面側の高圧部面積より若干広くなっており、摺接面がドライブギヤ２０１,ドリブンギヤ２０２の側面に押し付けられて、隙間が極力狭くなるようにしている。図中左側のベアリングケース２２０とマウンティング２３０間の隙間および図中右側のベアリングケース２２０とカバー２４０間の隙間は、ガスケット２５０にて高低圧を区画している。また、ボディ２１０の図中左端をマウンティング２３０により覆うと共に、ボディ２１０の図中右側をカバー２４０で覆っている。上記ボディ２１０とマウンティング２３０とカバー２４０でハウジングを構成している。このハウジング内に、互いに噛み合うドライブギヤ２０１とドリブンギヤ２０２を収納している。   Further, the high-pressure part area of the non-sliding contact surface of the bearing cases 220 and 220 is slightly larger than the high-pressure part area on the sliding contact surface side, and the sliding contact surface is pressed against the side surfaces of the drive gear 201 and the driven gear 202, The gap is made as narrow as possible. A gap between the bearing case 220 on the left side in the drawing and the mounting 230 and a gap between the bearing case 220 on the right side in the drawing and the cover 240 define a high pressure and a low pressure by the gasket 250. The left end of the body 210 in the figure is covered with a mounting 230, and the right side of the body 210 in the figure is covered with a cover 240. The body 210, the mounting 230, and the cover 240 constitute a housing. A drive gear 201 and a driven gear 202 that mesh with each other are housed in the housing.

上記ドライブギヤ２０１を駆動する第１回転軸２１１の一端(図４中右側)は、ベアリングケース２２０に軸受２１３Ａを介して回転自在に支持され、第１回転軸２１１の他端(図１中左側)は、ベアリングケース２２０に軸受２１３Ｂを介して回転自在に支持されている。上記第１回転軸２１１の他端側の連結部２１１aがマウンティング２３０から突出し、その連結部２１１aに図示しないモータの駆動軸が連結される。また、上記ドリブンギヤ２０２の第２回転軸２１２の一端(図１中右側)は、ベアリングケース２２０に軸受２１４Ａを介して回転自在に支持され、第２回転軸２１２の他端(図４中左側)は、ベアリングケース２２０に軸受２１４Ｂを介して回転自在に支持されている。図４において、２１５はオイルシールである。   One end (right side in FIG. 4) of the first rotating shaft 211 that drives the drive gear 201 is rotatably supported by the bearing case 220 via a bearing 213A, and the other end (left side in FIG. 1) of the first rotating shaft 211. ) Is rotatably supported by the bearing case 220 via the bearing 213B. A connecting portion 211a on the other end side of the first rotating shaft 211 protrudes from the mounting 230, and a drive shaft of a motor (not shown) is connected to the connecting portion 211a. Further, one end (right side in FIG. 1) of the second rotating shaft 212 of the driven gear 202 is rotatably supported by the bearing case 220 via a bearing 214A, and the other end (left side in FIG. 4) of the second rotating shaft 212. Is supported rotatably on the bearing case 220 via a bearing 214B. In FIG. 4, 215 is an oil seal.

この第３実施形態のギヤポンプでは、ドライブギヤ２０１,ドリブンギヤ２０２の側面と摺接するベアリングケース２２０,２２０(摺接部材)の摺接面側は、第１実施形態または第２実施形態の第１,第２サイドプレートと同一の構成をしている。   In the gear pump of the third embodiment, the sliding contact surface side of the bearing cases 220 and 220 (sliding contact members) that are in sliding contact with the side surfaces of the drive gear 201 and the driven gear 202 is the same as that of the first embodiment or the second embodiment. It has the same configuration as the second side plate.

上記第３実施形態のギヤポンプは、第１実施形態のギヤポンプと同様の効果を有する。   The gear pump of the third embodiment has the same effect as the gear pump of the first embodiment.

また、上記第１〜第３実施形態では、サイドプレートまたはベアリングケースについて言及してきたが、そのいずれも用いない固定隙間方式のポンプでもギヤ側面と相対するマウンティングやカバーの摺接面に本発明を適応することは可能である。   In the first to third embodiments, the side plate or the bearing case has been mentioned. However, the present invention can be applied to the mounting facing the gear side surface and the sliding surface of the cover even in a fixed gap type pump that does not use any of them. It is possible to adapt.

以下に、マウンティングおよびカバーの摺接面に本発明を適応した第４実施形態を説明する。   Below, 4th Embodiment which applied this invention to the sliding contact surface of a mounting and a cover is described.

〔第４実施形態〕
図５はこの発明の第４実施形態のギヤ流体装置の一例としてのギヤポンプの断面図を示している。この第４実施形態のギヤポンプは、サイドプレートとベアリングケースがない点とマウンティングとカバーが異なる点を除いて第１実施形態のギヤポンプと同一の構成をしている。 [Fourth Embodiment]
FIG. 5 shows a sectional view of a gear pump as an example of a gear fluid device according to a fourth embodiment of the present invention. The gear pump of the fourth embodiment has the same configuration as the gear pump of the first embodiment except that there is no side plate and a bearing case, and that the mounting and the cover are different.

この第１実施形態のギヤポンプは、図５に示すように、軸が平行でかつ一部が重なり合う２つの円筒空間を有するボディ３１０と、上記ボディ３１０内に配置された平歯車であるドライブギヤ３０１(駆動ギヤ)と、上記ボディ３１０内に配置され、ドライブギヤ３０１と互いに噛み合う平歯車であるドリブンギヤ３０２(従動ギヤ)とを備えている。上記ボディ３１０に吸入ポート(図示せず)と吐出ポート(図示せず)を設けている。   As shown in FIG. 5, the gear pump according to the first embodiment includes a body 310 having two cylindrical spaces whose axes are parallel and partially overlapping, and a drive gear 301 which is a spur gear disposed in the body 310. (Drive gear) and a driven gear 302 (driven gear) that is a spur gear that is disposed in the body 310 and meshes with the drive gear 301. The body 310 is provided with a suction port (not shown) and a discharge port (not shown).

また、ボディ３１０の図中左端をマウンティング３２０により覆うと共に、ボディ３１０の図中右側をカバー３３０で覆っている。上記ボディ３１０とマウンティング３２０とカバー３３０でハウジングを構成している。このハウジング内に、互いに噛み合う歯(図示せず)を有するドライブギヤ３０１とドリブンギヤ３０２を収納している。   Further, the left end of the body 310 in the figure is covered with a mounting 320, and the right side of the body 310 in the figure is covered with a cover 330. The body 310, the mounting 320, and the cover 330 constitute a housing. A drive gear 301 and a driven gear 302 having teeth (not shown) that mesh with each other are housed in the housing.

上記ボディ３１０内にドライブギヤ３０１の両側面とドリブンギヤ３０２の両側面を挟むように配置された摺接部材の一例としてのマウンティング３２０とカバー３３０によって、ドライブギヤ３０１,ドリブンギヤ３０２の側面とマウンティング３２０の摺接面およびドライブギヤ３０１,ドリブンギヤ３０２の側面とカバー３３０の摺接面とをシールし、吸入ポートに連通する低圧室および吐出ポートに連通する高圧室を形成している。   The drive gear 301, the side surfaces of the driven gear 302 and the side surfaces of the mounting 320 are provided by a mounting 320 and a cover 330 as an example of a sliding contact member disposed so as to sandwich both side surfaces of the drive gear 301 and both side surfaces of the driven gear 302 in the body 310. The sliding contact surface and the side surfaces of the drive gear 301 and the driven gear 302 and the sliding contact surface of the cover 330 are sealed to form a low pressure chamber communicating with the suction port and a high pressure chamber communicating with the discharge port.

上記ドライブギヤ３０１を駆動する第１回転軸３１１の一端(図５中右側)は、カバー３３０に軸受３１３Ａを介して回転自在に支持され、第１回転軸３１１の他端(図１中左側)は、マウンティング３２０に軸受３１３Ｂを介して回転自在に支持されている。上記第１回転軸３１１の他端側の連結部３１１aがマウンティング３２０から突出し、その連結部３１１aに図示しないモータの駆動軸が連結される。また、上記ドリブンギヤ３０２の第２回転軸３１２の一端(図１中右側)は、カバー３３０に軸受３１４Ａを介して回転自在に支持され、第２回転軸３１２の他端(図５中左側)は、マウンティング３２０に軸受３１４Ｂを介して回転自在に支持されている。図１において、３１５はオイルシールである。   One end (right side in FIG. 5) of the first rotating shaft 311 for driving the drive gear 301 is rotatably supported by the cover 330 via a bearing 313A, and the other end (left side in FIG. 1) of the first rotating shaft 311. Is supported rotatably on the mounting 320 via a bearing 313B. A connecting portion 311a on the other end side of the first rotating shaft 311 protrudes from the mounting 320, and a driving shaft of a motor (not shown) is connected to the connecting portion 311a. One end (right side in FIG. 1) of the second rotating shaft 312 of the driven gear 302 is rotatably supported by the cover 330 via a bearing 314A, and the other end (left side in FIG. 5) of the second rotating shaft 312 is The mounting 320 is rotatably supported via a bearing 314B. In FIG. 1, reference numeral 315 denotes an oil seal.

この第４実施形態のギヤポンプでは、ドライブギヤ３０１,ドリブンギヤ３０２の側面と摺接するマウンティング３２０,カバー３３０の摺接面側は、第１実施形態または第２実施形態の第１,第２サイドプレートと同一の構成をしている。   In the gear pump of the fourth embodiment, the drive gear 301, the mounting 320 that is in sliding contact with the side surfaces of the driven gear 302, and the sliding contact surface side of the cover 330 are the same as the first and second side plates of the first or second embodiment. It has the same configuration.

上記第４実施形態のギヤポンプは、第１実施形態のギヤポンプと同様の効果を有する。   The gear pump of the fourth embodiment has the same effect as the gear pump of the first embodiment.

以上、上記第１〜第４実施形態では、ギヤ流体装置の一例としてのギヤポンプについて説明したが、ギヤモータに関しても作用が反対であるだけで、構造は同様であるため、本発明を適応できる。   As described above, in the first to fourth embodiments, the gear pump as an example of the gear fluid device has been described. However, the present invention can be applied to the gear motor because the structure is the same except that the operation is opposite.

また、上記第１〜第４実施形態では、第１,第２サイドプレート５,６,１０５またはベアリングケース２２０,２２０またはマウンティング３２０,カバー３３０を摺接部材として備えたギヤ流体装置について説明したが、摺接部材はこれに限らず、ドライブギヤの側面とドリブンギヤの側面に摺接する摺接面を有する部材であればよい。   In the first to fourth embodiments, the gear fluid device including the first and second side plates 5, 6, 105, the bearing cases 220, 220, the mounting 320, and the cover 330 as sliding members has been described. The sliding contact member is not limited to this, and may be a member having a sliding contact surface that is in sliding contact with the side surface of the drive gear and the side surface of the driven gear.

また、上記第１〜第４実施形態では、ドライブギヤ１,２０１,３０１とドリブンギヤ２,２０２,３０２が平歯車であるギヤポンプについて説明したが、ドライブギヤ,ドリブンギヤが斜歯歯車であるギヤ流体装置にこの発明を適用してもよい。   In the first to fourth embodiments, the gear pump in which the drive gears 1, 201, 301 and the driven gears 2, 202, 302 are spur gears has been described. However, the gear fluid apparatus in which the drive gears, the driven gears are bevel gears. The present invention may be applied to.

また、上記第１〜第４実施形態では、第１,第２サイドプレート５,６,１０５の低圧側の逃げ溝５１,１５１に連通する溝部５３,５４,１５３,１５４と、貫通穴５aに連通する溝部５５,５６を設けたギヤポンプについて説明したが、サイドプレートに設ける溝部(または凹部)は逃げ溝に連通しなくてもよいし、低圧側でなく高圧側に設けてもよい。この場合でも、ドライブギヤおよびドリブンギヤの歯底径よりも径方向内側かつ回転軸用穴よりも径方向外側に、回転軸用穴と上記逃げ溝とが連通しないように溝部または凹部を設けることで、軸受部の潤滑状態を保ちつつ摺接面の磨耗を効果的に防止することができる。   In the first to fourth embodiments, the groove portions 53, 54, 153, 154 communicating with the low pressure side escape grooves 51, 151 of the first and second side plates 5, 6, 105 and the through holes 5 a are provided. Although the gear pump provided with the communicating groove portions 55 and 56 has been described, the groove portion (or recess) provided in the side plate may not be in communication with the escape groove, or may be provided on the high pressure side instead of the low pressure side. Even in this case, by providing a groove or a recess on the inner side in the radial direction than the root diameter of the drive gear and the driven gear and on the outer side in the radial direction than the hole for the rotary shaft so that the rotary shaft hole and the escape groove do not communicate with each other. Further, it is possible to effectively prevent wear of the sliding contact surface while maintaining the lubrication state of the bearing portion.

この発明の具体的な実施の形態について説明したが、この発明は上記第１〜第４実施形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。   Although specific embodiments of the present invention have been described, the present invention is not limited to the first to fourth embodiments, and various modifications can be made within the scope of the present invention.

１…ドライブギヤ
２…ドリブンギヤ
５…第１サイドプレート
５a,５b…貫通穴
６…第２サイドプレート
１０…ボディ
１１…第１回転軸
１１a…連結部
１２…第２回転軸
１３Ａ,１３Ｂ,１４Ａ,１４Ｂ…軸受
１５…オイルシール
２０…マウンティング
３０…カバー
４０…ガスケット
５１,５２…逃げ溝
５３,５４,５５,５６…溝部
１０５…第１サイドプレート
１０５a,１０５b…貫通穴
１５１,１５２…逃げ溝
１５３,１５４…溝部
２０１…ドライブギヤ
２０２…ドリブンギヤ
２１０…ボディ
２１１…第１回転軸
２１１a…連結部
２１２…第２回転軸
２１３Ａ,２１３Ｂ,２１４Ａ,２１４Ｂ…軸受
２１５…オイルシール
２２０,２２０…ベアリングケース
２３０…マウンティング
２４０…カバー
２５０…ガスケット
３０１…ドライブギヤ
３０２…ドリブンギヤ
３１０…ボディ
３１１…第１回転軸
３１１a…連結部
３１２…第２回転軸
３１３Ａ,３１３Ｂ,３１４Ａ,３１４Ｂ…軸受
３１５…オイルシール
３２０…マウンティング
３３０…カバー DESCRIPTION OF SYMBOLS 1 ... Drive gear 2 ... Driven gear 5 ... 1st side plate 5a, 5b ... Through-hole 6 ... 2nd side plate 10 ... Body 11 ... 1st rotating shaft 11a ... Connection part 12 ... 2nd rotating shaft 13A, 13B, 14A, 14B ... Bearing 15 ... Oil seal 20 ... Mounting 30 ... Cover 40 ... Gasket 51, 52 ... Escape groove 53, 54, 55, 56 ... Groove portion 105 ... First side plate 105a, 105b ... Through hole 151, 152 ... Escape groove 153 , 154 ... Groove part 201 ... Drive gear 202 ... Driven gear 210 ... Body 211 ... First rotating shaft 211a ... Connecting part 212 ... Second rotating shaft 213A, 213B, 214A, 214B ... Bearing 215 ... Oil seal 220, 220 ... Bearing case 230 ... Mounting 240 ... Cover 250 ... Gasket 301 ... Drive gear 3 2 ... driven gear 310 ... Body 311 ... first rotary shaft 311a ... connecting portion 312: second rotary shaft 313A, 313B, 314A, 314B ... bearing 315 ... oil seal 320 ... mounting 330 ... Cover

Claims (7)

互いに噛み合うドライブギヤ(１)およびドリブンギヤ(２)と、
上記ドライブギヤ(１)の側面と上記ドリブンギヤ(２)の側面に摺接する摺接面と、上記ドライブギヤ(１)と上記ドリブンギヤ(２)の各回転軸(１１,１２)が挿入された回転軸用穴(５a,５b)と、上記ドライブギヤ(１)と上記ドリブンギヤ(２)の噛み合い部分に形成される閉じ込み領域を低圧側および高圧側に夫々連通させる逃げ溝(５１,５２,１５１,１５２)を有する摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)と、
上記摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)の摺接面に上記ドライブギヤ(１)および上記ドリブンギヤ(２)の歯底径よりも径方向内側かつ上記回転軸用穴(５a,５b)よりも径方向外側に、上記回転軸用穴(５a,５b)と上記逃げ溝(５１,５２,１５１,１５２)とが連通しないように設けられた溝部(５３,５４,５５,５６,１５３,１５４)または凹部と
を備え、
上記摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)の摺接面に、上記ドライブギヤ(１)および上記ドリブンギヤ(２)の歯底径よりも径方向外側から上記回転軸用穴(５a,５b)に連通する溝部または凹部が存在しないことを特徴とするギヤ流体装置。 A drive gear (1) and a driven gear (2) meshing with each other;
The rotation in which the side surface of the drive gear (1), the sliding contact surface that is in sliding contact with the side surface of the driven gear (2), and the rotation shafts (11, 12) of the drive gear (1) and the driven gear (2) are inserted. Shaft holes (5a, 5b) and relief grooves (51, 52, 151) for communicating closed regions formed in meshing portions of the drive gear (1) and the driven gear (2) to the low pressure side and the high pressure side, respectively. , 152) having a sliding contact member (5, 6, 105, 106, 220, 220, 320, 330),
The sliding contact surfaces of the sliding contact members (5, 6, 105, 106, 220, 220, 320, 330) are radially inward from the root diameters of the drive gear (1) and the driven gear (2) and rotated. A groove portion (53) provided so that the rotation shaft hole (5a, 5b) and the escape groove (51, 52, 151, 152) do not communicate with each other on the radially outer side of the shaft hole (5a, 5b). , 54, 55, 56, 153, 154) or a recess ,
The sliding contact surfaces of the sliding contact members (5, 6, 105, 106, 220, 220, 320, 330) are arranged on the sliding contact surfaces from the radially outer side than the root diameters of the drive gear (1) and the driven gear (2). A gear fluid device characterized in that there is no groove or recess communicating with the rotation shaft hole (5a, 5b) . 請求項１に記載のギヤ流体装置において、The gear fluid device according to claim 1,
上記摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)の摺接面側から上記回転軸用穴(５a,５b)に漏れた作動流体を、上記ドライブギヤ(１)と上記ドリブンギヤ(２)の各回転軸(１１,１２)を回転自在に支持する軸受(１３Ａ,１３Ｂ,１４Ａ,１４Ｂ)を介して低圧側に夫々案内する戻り通路を備えたことを特徴とするギヤ流体装置。The working fluid leaked from the sliding contact side of the sliding contact member (5, 6, 105, 106, 220, 220, 320, 330) to the rotary shaft hole (5a, 5b) is transferred to the drive gear (1). And a return passage for guiding the rotary shafts (11, 12) of the driven gear (2) to the low-pressure side via bearings (13A, 13B, 14A, 14B) that rotatably support the rotary shafts. Gear fluid device. 請求項１または２に記載のギヤ流体装置において、
上記摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)は、上記ドライブギヤ(１)の両側面と上記ドリブンギヤ(２)の両側面を挟むように配置されたサイドプレート(５,６,１０５,１０６)もしくはベアリングケース(２２０,２２０)、または、上記ドライブギヤ(１)と上記ドリブンギヤ(２)が収納されたハウジング(３２０,３３０)であることを特徴とするギヤ流体装置。 The gear fluid device according to claim 1 or 2 ,
The sliding contact members (5, 6, 105, 106, 220, 220, 320, 330) are side plates arranged so as to sandwich both side surfaces of the drive gear (1) and both side surfaces of the driven gear (2). (5, 6, 105, 106) or bearing case (220, 220), or a housing (320, 330) in which the drive gear (1) and the driven gear (2) are housed. Fluid device. 請求項１から３までのいずれか１つに記載のギヤ流体装置において、
上記摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)の上記溝部(５３,５４,５５,５６,１５３,１５４)または上記凹部が低圧側に設けられていることを特徴とするギヤ流体装置。 The gear fluid device according to any one of claims 1 to 3 ,
The groove (53, 54, 55, 56, 153, 154) or the concave portion of the sliding contact member (5, 6, 105, 106, 220, 220, 320, 330) is provided on the low pressure side. A gear fluid device characterized. 請求項１から４までのいずれか１つに記載のギヤ流体装置において、
上記摺接部材(５,６,１０５,１０６,２２０,２２０,３２０,３３０)の上記溝部(５３,５４,１５３,１５４)または上記凹部が上記逃げ溝(５１,５２,１５１,１５２)に連なるように設けられていることを特徴とするギヤ流体装置。 The gear fluid device according to any one of claims 1 to 4 ,
The groove (53, 54, 153, 154) or the recess of the sliding contact member (5, 6, 105, 106, 220, 220, 320, 330) is formed in the escape groove (51, 52, 151, 152). A gear fluid device, wherein the gear fluid device is provided to be continuous. 請求項１から５までのいずれか１つに記載のギヤ流体装置において、
上記摺接部材(５,６)の上記溝部(５３,５４)または上記凹部の少なくとも１つが上記逃げ溝(５１)に連なるように設けられ、
上記摺接部材(５,６)の上記溝部(５５,５６)または上記凹部の少なくとも他の１つが上記回転軸用穴(５a,５b)に連なるように設けられていることを特徴とするギヤ流体装置。 The gear fluid device according to any one of claims 1 to 5 ,
At least one of the groove (53, 54) or the recess of the sliding contact member (5, 6) is provided so as to continue to the escape groove (51);
A gear characterized in that the groove (55, 56) of the sliding contact member (5, 6) or at least one of the recesses is provided so as to continue to the rotation shaft hole (5a, 5b). Fluid device. 請求項６に記載のギヤ流体装置において、
上記摺接部材(５,６)の上記逃げ溝(５１)に連なる上記溝部(５３,５４)または上記凹部の少なくとも１つの径方向内側の端部は、上記摺接部材(５,６)の上記回転軸用穴(５a,５b)に連なる上記溝部(５５,５６)または上記凹部の少なくとも１つの径方向外側の端部よりも径方向内側にあることを特徴とするギヤ流体装置。 The gear fluid device according to claim 6 , wherein
At least one radially inner end of the groove (53, 54) or the concave portion connected to the clearance groove (51) of the sliding contact member (5, 6) is formed on the sliding contact member (5, 6). A gear fluid device characterized by being located radially inward from at least one radially outer end of the groove (55, 56) or the recess connected to the rotation shaft hole (5a, 5b).
JP2014147177A 2013-09-18 2014-07-17 Gear fluid device Expired - Fee Related JP5783305B2 (en)

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