TW201544706A - Gear pump or motor - Google Patents

Gear pump or motor Download PDF

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Publication number
TW201544706A
TW201544706A TW104115869A TW104115869A TW201544706A TW 201544706 A TW201544706 A TW 201544706A TW 104115869 A TW104115869 A TW 104115869A TW 104115869 A TW104115869 A TW 104115869A TW 201544706 A TW201544706 A TW 201544706A
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Taiwan
Prior art keywords
gear
gears
slidability
pair
sliding
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TW104115869A
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Chinese (zh)
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TWI586892B (en
Inventor
Hiroshi Kiba
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Shimadzu Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/08Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12Rotary-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
    • F04C2/14Rotary-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
    • F04C2/18Rotary-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

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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)

Abstract

Disclosed is a gear pump or a motor capable of effectively ensuring the mechanical efficiency and the durability even though materials of which the sliding properties are different from each other are used at two sides of the gear. The gear pump or the motor comprises: a pair of gears engaged with each other; a housing structure body defined therein a gear storage room for storing the pair of gears; and a side panel received in the gear storage room. Inside the gear storage room, one lateral surface of the pair of gears is in sliding contact with the housing structure body, and the other lateral surface of the pair of gears is in sliding contact with the side panel. In the sliding property between the pair of gears and the housing structure body and the sliding property between the pair of gears and the side panel, an acting area of a hydraulic pressure that acts on the lateral surface of the gears with lower sliding property is made to be larger than an acting area of a hydraulic pressure that acts on the lateral surface of the gears with higher sliding property.

Description

齒輪泵或馬達 Gear pump or motor

本發明是有關於一種用於產業用機械等的齒輪泵(gear pump)或馬達(motor)。 The present invention relates to a gear pump or a motor for an industrial machine or the like.

以往,眾所周知有如下的液壓齒輪泵或馬達:在具有主體(body)及蓋體(cover)的殼(housing)構造體內收容有一對齒輪。在所述齒輪泵或馬達中,關於一對齒輪提出有如下者:為了擔保機械效率及耐久性,而自兩側由有別於主體及蓋體而構成的一對側板夾著(例如參照專利文獻1)。 Conventionally, there has been known a hydraulic gear pump or a motor in which a pair of gears are housed in a housing structure having a body and a cover. In the gear pump or the motor, a pair of gears are proposed to be sandwiched between a pair of side plates which are different from the main body and the cover body from both sides in order to secure mechanical efficiency and durability (for example, refer to the patent) Document 1).

此處,在作動中,液壓自所述側板中滑動接觸於齒輪的滑動面側朝向齒輪的側面作用。所述液壓作用的區域的大小即液壓的強度通常由齒輪相對於主體的旋轉角、與跨及自齒輪的齒底部朝向軸心的區域進行滑動的側板的密封(seal)長度兩者而決定。而且,齒輪的旋轉角每時每刻週期性變化,而所述密封長度以與齒輪的齒底徑和設於側板的孔徑的差相當的所述密封長度而決定。即,齒輪的形狀相同時的所述液壓作用的區域由所述密封長度而決定。另外,在側板的滑動面的背面側即非滑動面,向與 所述液壓相反的方向作用的液壓由將高低壓分隔的三字墊圈(gasket)的形狀而決定。即,在現有的液壓泵或馬達中,藉由對所述密封長度及所述墊圈的形狀進行適當調整以使液壓平衡,而以恰當的力將側板壓抵於齒輪,從而抑制自齒輪側面的內部洩漏。藉此,如所述專利文獻1中所記載的液壓齒輪泵或馬達由於利用同一形狀的側板將齒輪夾入,故而朝向齒輪的兩側面作用的液壓在前側(front side)與後側(rear side)相等。結果為,沿軸方向對齒輪作用的來自兩側板側的液壓相抵消,齒輪在軸方向上處於力學中立的狀態。 Here, in the operation, the hydraulic pressure acts from the sliding surface side of the side plate that is in sliding contact with the gear toward the side surface of the gear. The size of the hydraulically acting region, that is, the strength of the hydraulic pressure, is generally determined by both the rotational angle of the gear with respect to the main body and the seal length of the side plate that slid across the region from the tooth bottom of the gear toward the axial center. Moreover, the rotation angle of the gear changes periodically every moment, and the seal length is determined by the seal length corresponding to the difference between the tooth bottom diameter of the gear and the aperture provided in the side plate. That is, the region of the hydraulic action when the shapes of the gears are the same is determined by the length of the seal. In addition, on the back side of the sliding surface of the side plate, that is, the non-sliding surface, The hydraulic pressure acting in the opposite direction of the hydraulic pressure is determined by the shape of a three-word gasket that separates the high and low pressures. That is, in the conventional hydraulic pump or motor, the seal length and the shape of the washer are appropriately adjusted to balance the hydraulic pressure, and the side plate is pressed against the gear with an appropriate force, thereby suppressing the side of the self gear. Internal leakage. According to the hydraulic gear pump or the motor described in Patent Document 1, since the gear is sandwiched by the side plates of the same shape, the hydraulic pressure acting toward both side faces of the gear is on the front side and the rear side (rear side). )equal. As a result, the hydraulic pressure from the side plates on both sides of the gear acting in the axial direction cancels out, and the gear is in a mechanically neutral state in the axial direction.

現有技術文獻 Prior art literature

專利文獻 Patent literature

專利文獻1:日本專利特開2012-077686號公報 Patent Document 1: Japanese Patent Laid-Open Publication No. 2012-077686

另外,目前亦設想如下情況:以設計自由度的增大等為目的,在齒輪的兩側使用不同的原材料。在此情況下,若與以往同樣地將作用於齒輪的來自兩側的液壓設定為相等,有如下擔憂:在滑動接觸於齒輪的滑動面中,滑動性差的原材料側與滑動性優異的原材料側相比摩擦大,因而卡滯(seizure)的可能性變高。而且,認為在此情況下,與在齒輪的兩側使用滑動性相等的滑動材料的現有的情況相比,機械效率及耐久性亦變差。 In addition, it is also assumed that different materials are used on both sides of the gear for the purpose of increasing the degree of freedom in design and the like. In this case, the hydraulic pressure from both sides of the gear is set to be equal in the same manner as in the related art, and there is a concern that the material side having poor slidability and the material side excellent in slidability are in the sliding surface that is in sliding contact with the gear. Compared with friction, the possibility of seizure becomes high. Further, in this case, it is considered that mechanical efficiency and durability are also deteriorated compared with the conventional case where a sliding material having the same sliding property is used on both sides of the gear.

本發明著眼於此種不良情況,目的在於提供一種齒輪泵 或馬達,其即便當在齒輪的兩側使用滑動性互不相同的原材料時,亦可有效地擔保機械效率及耐久性。 The present invention focuses on such a problem and aims to provide a gear pump Or a motor that can effectively guarantee mechanical efficiency and durability even when raw materials having different slidability are used on both sides of the gear.

本發明為了達成此種目的,採取如下手段。 In order to achieve such a purpose, the present invention adopts the following means.

即,本發明的齒輪泵或馬達包括:齒輪對,相互嚙合而成;殼構造體,在內部具有收納所述齒輪對的齒輪收納室;以及一個側板,收容在所述齒輪收納室;且在所述齒輪收納室的內側,所述齒輪對的一側面與所述殼構造體滑動接觸,並且所述齒輪對的另一側面與所述側板滑動接觸,所述齒輪泵或馬達的特徵在於:在所述齒輪對與所述殼構造體之間的滑動性、及所述齒輪對與所述側板之間的滑動性中,使作用於滑動性低的一側的齒輪側面的液壓的作用面積大於作用於滑動性高的一側的齒輪側面的液壓的作用面積。 That is, the gear pump or motor of the present invention includes: a pair of gears that mesh with each other; a casing structure having a gear housing chamber that houses the pair of gears therein; and a side plate housed in the gear housing chamber; An inner side of the gear accommodation chamber, one side of the pair of gears is in sliding contact with the shell structure, and the other side of the pair of gears is in sliding contact with the side plate, and the gear pump or motor is characterized by: In the slidability between the gear pair and the shell structure, and the slidability between the pair of gears and the side plate, the acting area of the hydraulic pressure acting on the side of the gear on the side with low slidability It is larger than the acting area of the hydraulic pressure acting on the side of the gear on the side where the slidability is high.

另外,本發明的齒輪泵或馬達包括:齒輪對,相互嚙合而成;以及殼構造體,在內部具有收納所述齒輪對的齒輪收納室,且在所述齒輪收納室的內側與所述齒輪對的兩側面分別滑動接觸;所述齒輪泵或馬達的特徵在於:在所述齒輪對與所述殼構造體之間的滑動性中,使作用於滑動性低的一側的齒輪側面的液壓的作用面積大於作用於滑動性高的一側的齒輪側面的液壓的作用面積。 Further, the gear pump or motor of the present invention includes: a pair of gears that mesh with each other; and a casing structure having a gear housing chamber that accommodates the pair of gears, and inside the gear accommodation chamber and the gear The pair of sides are respectively in sliding contact; the gear pump or the motor is characterized in that, in the slidability between the pair of gears and the casing structure, the hydraulic pressure acting on the side of the gear on the side with low slidability The area of action is larger than the area of action of the hydraulic pressure acting on the side of the gear on the side where the slidability is high.

而且,本發明的齒輪泵或馬達包括:齒輪對,相互嚙合而成;殼構造體,在內部具有收納所述齒輪對的齒輪收納室;以 及兩個側板,配置成在所述齒輪收納室的內側分別與所述齒輪對的兩側面滑動接觸;所述齒輪泵或馬達的特徵在於:在所述齒輪對與所述兩個側板之間的滑動性中,使作用於滑動性低的一側的齒輪側面的液壓的作用面積大於作用於滑動性高的一側的齒輪側面的液壓的作用面積。 Further, the gear pump or motor of the present invention includes: a pair of gears that mesh with each other; and a casing structure having a gear housing chamber that houses the pair of gears; And two side plates configured to be in sliding contact with the two sides of the pair of gears on the inner side of the gear accommodation chamber; the gear pump or motor is characterized in that between the pair of gears and the two side plates In the slidability, the acting area of the hydraulic pressure acting on the side surface of the gear on the side having low slidability is larger than the acting area of the hydraulic pressure acting on the side surface of the gear on the side having high slidability.

若為如上所述者,則在作動中,對所述齒輪對產生自滑動性低的一側朝向滑動性高的一側施力的力。藉此,可抑制在滑動性低的一側容易引起卡滯的不良情況。此外,與將所述作用面積及滑動性設為相等時相比,亦一併抑制因使一側的滑動性低的情況而導致的機械效率的下降。結果為,即便當在齒輪的兩側使用滑動性互不相同的原材料時,亦可有效地保持機械效率及耐久性,因此,可提供有效提高構成齒輪收納室的設計自由度的齒輪泵或馬達。 In the above-described operation, the gear pair is biased toward the side with high slidability from the side where the slidability is low. Thereby, it is possible to suppress a problem that the slidability is low and the seizure is likely to occur. Further, as compared with the case where the working area and the slidability are made equal, the deterioration of the mechanical efficiency due to the fact that the slidability on one side is low is also suppressed. As a result, even when raw materials having different slidability are used on both sides of the gear, mechanical efficiency and durability can be effectively maintained, and therefore, a gear pump or motor which can effectively improve the degree of design freedom of the gear accommodation chamber can be provided. .

根據本發明,可提供如下的齒輪泵或馬達:即便當在齒輪的兩側使用滑動性互不相同的原材料時,亦可有效地擔保機械效率及耐久性。 According to the present invention, it is possible to provide a gear pump or a motor which can effectively guarantee mechanical efficiency and durability even when raw materials having different slidability are used on both sides of the gear.

1‧‧‧殼構造體 1‧‧‧Shell structure

2‧‧‧齒輪(驅動齒輪) 2‧‧‧ Gears (drive gears)

3‧‧‧齒輪(從動齒輪) 3‧‧‧ Gears (driven gears)

2a、3a‧‧‧側面 2a, 3a‧‧‧ side

2b、3b‧‧‧齒底 2b, 3b‧‧‧ tooth bottom

2c、3c‧‧‧齒頂 2c, 3c‧‧‧ tooth top

4‧‧‧驅動軸 4‧‧‧Drive shaft

5‧‧‧從動軸 5‧‧‧ driven shaft

6‧‧‧側板 6‧‧‧ side panels

6b、6c‧‧‧軸承孔 6b, 6c‧‧‧ bearing holes

6b1、6c1‧‧‧端部 6b1, 6c1‧‧‧ end

6d、61d、62d、11d、12d‧‧‧滑動面 6d, 61d, 62d, 11d, 12d‧‧‧ sliding surfaces

6e‧‧‧非滑動面 6e‧‧‧ non-sliding surface

6f‧‧‧墊圈槽 6f‧‧‧Way washer

7‧‧‧軸襯 7‧‧‧ Bushing

8‧‧‧墊圈 8‧‧‧Washers

11‧‧‧主體 11‧‧‧ Subject

11a‧‧‧齒輪收納室 11a‧‧‧ Gear storage room

11b、11c‧‧‧軸承孔 11b, 11c‧‧‧ bearing holes

11b1、11c1‧‧‧端部 11b1, 11c1‧‧‧ end

12‧‧‧前蓋 12‧‧‧ front cover

12b、12c‧‧‧軸承孔 12b, 12c‧‧‧ bearing holes

12b1、12c1‧‧‧端部 12b1, 12c1‧‧‧ end

I、II、III、IV、V、VI、VII、VIII‧‧‧放大部分 I, II, III, IV, V, VI, VII, VIII‧‧

L6、L61、L62、L11、L12‧‧‧作用面積(密封長度) L6, L61, L62, L11, L12‧‧‧ area of action (seal length)

X、Y‧‧‧液壓 X, Y‧‧‧ hydraulic

Z‧‧‧力(液壓X與液壓Y的作用力的差分) Z‧‧‧ force (difference between the force of hydraulic X and hydraulic Y)

ΦS、ΦB、ΦF、ΦS1、ΦS2‧‧‧直徑 ΦS, ΦB, ΦF, ΦS1, ΦS2‧‧‧ diameter

圖1是表示本發明的第一實施方式的齒輪泵的構成的概略圖及主要部分的放大圖。 1 is a schematic view showing a configuration of a gear pump according to a first embodiment of the present invention, and an enlarged view of a main part.

圖2是圖1的主要部分的說明圖。 Fig. 2 is an explanatory view of a main part of Fig. 1;

圖3是本發明的第二實施方式的與圖1相應的概略圖及主要部分的放大圖。 Fig. 3 is a schematic view and an enlarged view of a main part corresponding to Fig. 1 according to a second embodiment of the present invention.

圖4是圖3的主要部分的說明圖。 Fig. 4 is an explanatory view of a main part of Fig. 3;

圖5是本發明的第三實施方式的與圖1相應的概略圖及主要部分的放大圖。 Fig. 5 is a schematic view and an enlarged view of a main part corresponding to Fig. 1 according to a third embodiment of the present invention.

圖6是圖5的主要部分的說明圖。 Fig. 6 is an explanatory diagram of a main part of Fig. 5;

圖7是本發明的第四實施方式的與圖1相應的概略圖及主要部分的放大圖。 Fig. 7 is a schematic view and an enlarged view of a main part corresponding to Fig. 1 according to a fourth embodiment of the present invention.

圖8是圖7的主要部分的說明圖。 Fig. 8 is an explanatory diagram of a main part of Fig. 7;

以下,參照圖式對本發明的各實施方式進行說明。 Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

本發明的各實施方式的齒輪泵執行如下泵作用:當經由使一端向外部延伸出而成的所述驅動軸4,對所述驅動齒輪2及從動齒輪3進行驅動時,將自吸入口導入的作動液封入至在驅動齒輪2及從動齒輪3的齒頂與殼構造體1的內周之間封閉成的容積空間中,並引導至吐出口進行吐出。而且,所述齒輪泵當然亦可作為執行如下馬達作用的齒輪馬達發揮作用,即,將高壓的作動液導入,藉此,自所述驅動軸4提取旋轉轉矩(torque)而對外部負載進行驅動,並且吐出已成為低壓的作動液。 The gear pump according to each embodiment of the present invention performs a pumping action: when the drive gear 2 and the driven gear 3 are driven via the drive shaft 4 that extends outward from one end, the self-suction port is driven. The introduced actuating liquid is sealed in a volume enclosed between the addendum of the drive gear 2 and the driven gear 3 and the inner circumference of the casing structure 1, and is guided to the discharge port for discharge. Further, the gear pump may of course function as a gear motor that performs a motor function of introducing a high-pressure operating fluid, thereby extracting a torque from the drive shaft 4 to perform an external load. Drive and spit out the working fluid that has become low pressure.

<第一實施方式> <First embodiment>

以下,參照圖1及圖2對本發明的第一實施方式進行說明。 Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 and 2 .

本實施方式的齒輪泵主要包括:殼構造體1,在內部具 有齒輪收納室11a;外接齒輪對,即,驅動齒輪2及從動齒輪3,收納保持於所述殼構造體1的齒輪收納室11a內且相互嚙合而成;以及一個側板6,在本實施方式中接續於齒輪2、齒輪3的前側。即,本實施方式的齒輪泵包括:齒輪2、齒輪3;殼構造體1,在內部具有收納所述齒輪2、齒輪3的齒輪收納室11a;以及一個側板6,收容於所述齒輪收納室11a內;且在齒輪收納室11a的內側,齒輪2、齒輪3的一側面2a、側面3a與所述殼構造體1的主體11滑動接觸,並且另一側面2a、側面3a與側板6滑動接觸。詳細而言,殼構造體1與側板6分別具有滑動面11d、滑動面6d,該滑動面11d、滑動面6d在齒輪收納室11a的內側自前側及後側分別與齒輪2、齒輪3的側面2a、側面3a滑動接觸。 The gear pump of the present embodiment mainly includes: a shell structure 1 having a a gear storage chamber 11a; an external gear pair, that is, the drive gear 2 and the driven gear 3 are housed and held in the gear housing chamber 11a of the casing structure 1 and meshed with each other; and a side plate 6 in this embodiment In the manner, the front side of the gear 2 and the gear 3 are connected. In other words, the gear pump of the present embodiment includes a gear 2 and a gear 3, and a casing structure 1 having a gear housing chamber 11a in which the gear 2 and the gear 3 are housed, and a side plate 6 housed in the gear housing chamber. In the inside of the gear housing chamber 11a, one side surface 2a and the side surface 3a of the gear 2, the gear 3 are in sliding contact with the main body 11 of the casing structure 1, and the other side surface 2a and the side surface 3a are in sliding contact with the side plate 6. . Specifically, the case structure 1 and the side plate 6 respectively have a sliding surface 11d and a sliding surface 6d. The sliding surface 11d and the sliding surface 6d are respectively on the inner side of the gear housing chamber 11a from the front side and the rear side to the side of the gear 2 and the gear 3, respectively. 2a, the side surface 3a is in sliding contact.

驅動齒輪2及從動齒輪3是將多個齒體自齒底2b、齒底3b朝向齒頂2c、齒頂3c即外周面以規定間隔呈放射狀設置而成的眾所周知的齒輪。另外,在本實施方式中,使驅動軸4自所述驅動齒輪2的中心沿旋轉軸方向一體地延伸而設置,並且使從動軸5自從動齒輪3沿旋轉軸方向一體地延伸而設置,但亦可將驅動齒輪2與驅動軸4構成為不同個體,且將從動齒輪3與從動軸5構成為不同個體。 The drive gear 2 and the driven gear 3 are well-known gears in which a plurality of teeth are radially provided at a predetermined interval from the tooth bottom 2b and the tooth bottom 3b toward the tooth top 2c and the tooth top 3c, that is, the outer peripheral surface. Further, in the present embodiment, the drive shaft 4 is integrally provided to extend from the center of the drive gear 2 in the rotation axis direction, and the driven shaft 5 is integrally extended from the driven gear 3 in the rotation axis direction. However, the drive gear 2 and the drive shaft 4 may be configured as different individuals, and the driven gear 3 and the driven shaft 5 may be configured as different individuals.

殼構造體1例如包括:主體11,具有所述齒輪收納室11a;以及作為蓋體的前蓋(front cover)12,將所述齒輪收納室11a的開口面封閉。另外,在本實施方式中,將主體11本身設為可將後側封閉,但當然亦可設為使所述主體11的後側亦開口並利 用另外的後蓋(rear cover)進行封閉的構成。 The casing structure 1 includes, for example, a main body 11 having the gear housing chamber 11a, and a front cover 12 as a lid body that closes an opening surface of the gear housing chamber 11a. Further, in the present embodiment, the main body 11 itself may be closed to the rear side, but of course, the rear side of the main body 11 may be opened and The structure is closed with a separate rear cover.

在本實施方式中,主體11例如應用由鑄鐵形成者。主體11中形成有:大致眼鏡狀的齒輪收納室11a,將所述齒輪對、即驅動齒輪2及從動齒輪3以嚙合狀態收容;以及軸承孔11b、軸承孔11c,與齒輪收納室11a的後側連通,可分別供所述驅動軸4及從動軸5插入。在驅動齒輪2應插入的位置附近的軸承孔11b內嵌裝有軸襯(bush)7,在該軸襯7內插入所述驅動軸4的一端部而將其可旋轉地支承。另一方面,在從動齒輪3應插入的位置附近的軸承孔11c內亦嵌裝有軸襯7,在該軸襯7內插入所述從動軸5的一端部而將其可旋轉地支承。另外,在主體11中,在所述驅動齒輪2與從動齒輪3的嚙合節圓(pitch circle)的切線方向側的規定位置,即,與所述驅動齒輪2和從動齒輪3的嚙合節圓臨近的位置,分別開設有未圖示的吸入口及吐出口。 In the present embodiment, the main body 11 is applied, for example, by a cast iron. The main body 11 is formed with a substantially eyeglass-shaped gear accommodation chamber 11a, and the gear pair, that is, the drive gear 2 and the driven gear 3 are housed in an engaged state, and the bearing hole 11b, the bearing hole 11c, and the gear housing chamber 11a. The rear side is connected to each other, and the drive shaft 4 and the driven shaft 5 are respectively inserted. A bush 7 is fitted in the bearing hole 11b near the position where the drive gear 2 is to be inserted, and one end portion of the drive shaft 4 is inserted into the bushing 7 to be rotatably supported. On the other hand, a bushing 7 is also fitted in the bearing hole 11c near the position where the driven gear 3 is to be inserted, and one end portion of the driven shaft 5 is inserted into the bushing 7 to be rotatably supported therein. . Further, in the main body 11, a predetermined position on the tangential direction side of the pitch circle of the drive gear 2 and the driven gear 3, that is, a meshing section with the drive gear 2 and the driven gear 3 At the position adjacent to the circle, a suction port and a discharge port (not shown) are respectively opened.

而且,在本實施方式中,在所述主體11形成有滑動面11d,該滑動面11d與齒輪2、齒輪3的後側的側面2a、側面3a滑動接觸。而且,滑動面11d與側面2a、側面3a滑動接觸的面積,即,自滑動面11d側推壓側面2a、側面3a的液壓的作用面積由軸承孔11b、軸承孔11c的直徑的設定而決定。換言之,如將圖1中的II部放大所示,由自軸承孔11b、軸承孔11c的端部11b1、端部11c1至齒底2b、齒底3b的距離即密封長度L11而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面11d與側面2a、側面3a之間的間隙,藉此,一直作用有 欲使滑動面11d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而且,所述作用力的大小與滑動面11d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L11的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L11越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向前側推壓的作用力越大。 Further, in the present embodiment, the main body 11 is formed with a sliding surface 11d that is in sliding contact with the gear 2, the side surface 2a on the rear side of the gear 3, and the side surface 3a. Further, the area in which the sliding surface 11d is in sliding contact with the side surface 2a and the side surface 3a, that is, the area of the hydraulic pressure that presses the side surface 2a and the side surface 3a from the sliding surface 11d side is determined by the setting of the diameter of the bearing hole 11b and the bearing hole 11c. In other words, as shown in an enlarged view of the portion II in Fig. 1, the distance from the bearing hole 11b, the end portion 11b1 of the bearing hole 11c, the end portion 11c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the seal length L11 is determined. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 11d and the side surface 2a and the side surface 3a, thereby always acting The urging force for separating the sliding surface 11d from the side surface 2a and the side surface 3a, that is, the urging force of the side surface 2a and the side surface 3a. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 11d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L11. In other words, the longer the seal length L11 is, the larger the force acting on the front side 2a and the side surface 3a on the front side by the operating fluid in the gear accommodation chamber 11a.

前蓋12例如利用螺栓(bolt)等而可裝卸地安裝於主體11,並將所述齒輪收納室11a的前側開口面封閉,例如為壓鑄鋁(aluminium die casting)製,且形成有可供所述驅動軸4及從動軸5分別插入的軸承孔12b、軸承孔12c。在驅動齒輪2應插入的位置附近的軸承孔12b嵌裝有軸襯7,在該軸襯7內插入所述驅動軸4的一端部而將其可旋轉地支承。另一方面,在從動齒輪3應插入的位置附近的軸承孔12c亦嵌裝有軸襯7,在該軸襯7內插入所述從動軸5的一端部而將其可旋轉地支承。 The front cover 12 is detachably attached to the main body 11 by, for example, a bolt or the like, and the front opening surface of the gear housing chamber 11a is closed, for example, made of aluminum die casting, and is provided with a supply. The bearing hole 12b and the bearing hole 12c into which the drive shaft 4 and the driven shaft 5 are inserted, respectively. A bushing 7 is fitted to the bearing hole 12b near the position where the drive gear 2 is to be inserted, and one end portion of the drive shaft 4 is inserted into the bushing 7 to be rotatably supported. On the other hand, a bushing 7 is fitted to the bearing hole 12c near the position where the driven gear 3 is to be inserted, and one end portion of the driven shaft 5 is inserted into the bushing 7 to be rotatably supported.

側板6例如為使用鉛或鉛青銅鑄件等耐腐蝕性、強度、耐磨耗性優異的適當原材料而成的板狀者,且形成有可供所述驅動軸4及從動軸5分別插入的軸承孔6b、軸承孔6c。在本實施方式中,如圖1所示,側板6是為了接續於所述驅動齒輪2及從動齒輪3的前側的側面2a、側面3a而配設,用於將驅動齒輪2及從動齒輪3的側面2a、側面3a密封。另一方面,如該圖所示,在所述側板6的非滑動面6e設置有墊圈槽6f,以便將墊圈8嵌入該墊 圈槽6f。 The side plate 6 is formed into a plate shape using a suitable material having excellent corrosion resistance, strength, and wear resistance such as lead or lead bronze casting, and is formed by inserting the drive shaft 4 and the driven shaft 5, respectively. Bearing hole 6b, bearing hole 6c. In the present embodiment, as shown in FIG. 1, the side plate 6 is disposed to be connected to the front side surface 2a and the side surface 3a of the front side of the drive gear 2 and the driven gear 3, and is used to drive the gear 2 and the driven gear. The side surface 2a and the side surface 3a of 3 are sealed. On the other hand, as shown in the figure, a washer groove 6f is provided on the non-sliding surface 6e of the side plate 6 to embed the gasket 8 in the pad. Circle groove 6f.

而且,在本實施方式中,在所述側板6形成有滑動面6d,該滑動面6d與齒輪2、齒輪3的前側的側面2a、側面3a滑動接觸。而且,滑動面6d與側面2a、側面3a滑動接觸的面積,即,自滑動面6d側推壓側面2a、側面3a的液壓的作用面積由圖2所示的軸承孔6b、軸承孔6c的直徑ΦS的尺寸設定而決定。換言之,如將圖1中的I部放大所示,由自軸承孔6b、軸承孔6c的端部6b1、端部6c1至齒底2b、齒底3b的距離即密封長度L6而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面6d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面6d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而且,所述作用力的大小與滑動面6d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L6的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L6越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向後側推壓的作用力越大。 Further, in the present embodiment, the side plate 6 is formed with a sliding surface 6d that is in sliding contact with the front side 2a and the side surface 3a of the gear 2 and the front side of the gear 3. Further, the area in which the sliding surface 6d is in sliding contact with the side surface 2a and the side surface 3a, that is, the acting area of the hydraulic pressure that presses the side surface 2a and the side surface 3a from the sliding surface 6d side is the diameter of the bearing hole 6b and the bearing hole 6c shown in Fig. 2 . It is determined by the size setting of ΦS. In other words, as shown in an enlarged view of the portion I in Fig. 1, the distance from the bearing hole 6b, the end portion 6b1 of the bearing hole 6c, the end portion 6c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the seal length L6 is determined. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 6d and the side surface 2a and the side surface 3a, whereby the sliding surface 6d and the side surface 2a are always acted upon. The force that is separated by the side surface 3a, that is, the force of the side surface 2a and the side surface 3a is pressed. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 6d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L6. In other words, the longer the seal length L6 is, the larger the force acting on the rear side by pressing the side surface 2a and the side surface 3a by the operating fluid in the gear housing chamber 11a.

繼而,本實施方式的齒輪泵或馬達如上所述般,具有:相互嚙合而成的齒輪2、齒輪3;在內部具有收納所述齒輪2、齒輪3的齒輪收納室11a;而齒輪2、齒輪3的兩側面2a、3a是分別滑動接觸所述齒輪收納室11a的內側,且在齒輪2、齒輪3與主體11之間的滑動性、及所述齒輪2、齒輪3與側板6之間的滑動性 中,使作用於滑動性低的一側即與主體11面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積大於作用於滑動性高的一側即與側板6面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積。詳細而言,在與齒輪2、齒輪3的一側面2a、側面3a滑動接觸的一滑動面11d的滑動性、即鑄鐵的滑動性低於另一滑動面6d的滑動性、即鉛或鉛青銅鑄件等原材料的滑動性的狀況下,使決定自一滑動面11d側作用於齒輪2、齒輪3的一側面2a、側面3a的液壓的作用面積的密封長度L11大於決定自另一滑動面6d側作用於齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積的密封長度L6。 Then, the gear pump or the motor of the present embodiment has the gear 2 and the gear 3 that mesh with each other as described above, and the gear housing chamber 11a that houses the gear 2 and the gear 3 therein; and the gear 2 and the gear The two side faces 2a, 3a of the sliding member 3 are slidably contacted with the inner side of the gear housing chamber 11a, and the slidability between the gear 2, the gear 3 and the main body 11, and the gear 2, between the gear 3 and the side plate 6. Slidability In the middle, the hydraulic pressure acting on the side of the gear 2 that faces the main body 11 and the side surface 2a and the side surface 3a of the gear 3 is larger than the side that acts on the side with high slidability, that is, the side plate 6 The working area of the hydraulic pressure of the side surface 2a and the side surface 3a of the gear 2 and the gear 3. Specifically, the slidability of the sliding surface 11d which is in sliding contact with the one side surface 2a and the side surface 3a of the gear 2, the gear 3, that is, the slidability of the cast iron is lower than the slidability of the other sliding surface 6d, that is, lead or lead bronze In the case of the slidability of the material such as the casting material, the sealing length L11 that determines the working area of the hydraulic pressure acting on the one side surface 2a and the side surface 3a of the gear 2 and the gear 3 from the side of the sliding surface 11d is larger than the other sliding surface 6d side. The sealing length L6 of the acting area of the hydraulic pressure acting on the side surface 2a of the gear 2, the gear 3, and the side surface 3a.

藉此,如圖1所示,自主體11的滑動面11d側將齒輪2、齒輪3的側面2a、側面3a向前側推壓的作用力即液壓X大於自側板6的滑動面6d側將齒輪2、齒輪3的側面2a、側面3a向後側推壓的作用力即液壓Y。結果為,齒輪2、齒輪3被施加相當於液壓X與液壓Y的作用力的差分Z的力。結果為,自滑動性低的主體11產生的摩擦得以減輕。 Thereby, as shown in FIG. 1, the hydraulic force X which pushes the gear 2, the side surface 2a of the gear 3, and the side surface 3a to the front side from the sliding surface 11 d side of the main body 11 is larger than the sliding surface 6 d side of the side plate 6 2. The force that pushes the side surface 2a of the gear 3 and the side surface 3a toward the rear side is the hydraulic pressure Y. As a result, the gear 2 and the gear 3 are applied with a force corresponding to the difference Z between the hydraulic force X and the hydraulic force Y. As a result, the friction generated by the main body 11 having low slidability is alleviated.

此處,在本實施方式中,齒輪2、齒輪3在兩側應用相同形狀或對稱形狀的齒輪。即,就齒輪而言,以齒底、齒頂的尺寸為首不改變任何形狀而實現所述本實施方式的構成。即,如圖2所示,在本實施方式中,僅藉由使軸承孔11b、軸承孔11c的直徑ΦB小於軸承孔6b、軸承孔6c的直徑ΦS,而如圖1中放大所示,使密封長度L11大於密封長度L6,藉此,使液壓作用的作用面積 增大。 Here, in the present embodiment, the gear 2 and the gear 3 apply gears of the same shape or symmetrical shape on both sides. That is, in the case of the gear, the configuration of the present embodiment is realized without changing any shape, such as the size of the tooth bottom and the tooth tip. That is, as shown in FIG. 2, in the present embodiment, only the diameter ΦB of the bearing hole 11b and the bearing hole 11c is made smaller than the diameter ΦS of the bearing hole 6b and the bearing hole 6c, as shown in an enlarged view in FIG. The sealing length L11 is larger than the sealing length L6, thereby making the working area of the hydraulic action Increase.

藉由設為如以上的構成,在本實施方式中,藉由產生朝向側板6施加的力Z,而有效地抑制在滑動性低的一側的滑動面11d容易引起卡滯的不良情況。此外,亦一併抑制因主體11的滑動面11d的滑動性低於側板6的滑動面6d的滑動性的情況而導致的機械效率的下降。結果為,即便當對於齒輪2、齒輪3的兩側面2a、3a使用滑動性互不相同的原材料時,亦可有效地擔保機械效率及耐久性。因此,實現有效提高構成滑動面的設計自由度的齒輪泵或馬達。 With the configuration described above, in the present embodiment, the force Z applied to the side plate 6 is generated, and the problem that the sliding surface 11d on the side having low slidability is likely to be stuck is effectively suppressed. Further, the deterioration of the mechanical efficiency due to the slidability of the sliding surface 11d of the main body 11 being lower than the sliding property of the sliding surface 6d of the side plate 6 is also suppressed. As a result, even when materials having different slidability from each other are used for the both side faces 2a and 3a of the gear 2 and the gear 3, mechanical efficiency and durability can be effectively secured. Therefore, a gear pump or motor that effectively increases the degree of design freedom of the sliding surface is realized.

尤其是在本實施方式中,即便不在後側即主體11側設置側板,亦具有與以往同樣的機械效率及耐久性,因此,齒輪泵或馬達尺寸減少了至少相當於可不設置的側板的厚度尺寸而在齒輪的軸方向上小型地構成。 In particular, in the present embodiment, even if the side plate is not provided on the side of the main body 11 on the rear side, the mechanical efficiency and durability are the same as in the related art. Therefore, the size of the gear pump or the motor is reduced to at least the thickness of the side plate which can be omitted. It is formed in a small size in the axial direction of the gear.

以下,對本發明的各實施方式進行說明。在以下的實施方式中,對與所述實施方式中的構成要素相當者標註相同的符號並省略詳細的說明。 Hereinafter, each embodiment of the present invention will be described. In the following embodiments, the same components as those in the above-described embodiments are denoted by the same reference numerals, and the detailed description thereof will be omitted.

<第二實施方式> <Second Embodiment>

在所述第一實施方式中,揭示了將側板6僅設於齒輪2、齒輪3的前側的實施方式,但當然亦可如圖3及圖4所示的本實施方式般僅在齒輪2、齒輪3的後側設置側板6。 In the first embodiment, an embodiment in which the side plate 6 is provided only on the front side of the gear 2 and the gear 3 is disclosed. However, it is of course possible to use only the gear 2 as in the present embodiment shown in FIGS. 3 and 4 . The side plate 6 is provided on the rear side of the gear 3.

即,本實施方式的齒輪泵包括:齒輪2、齒輪3;殼構造體1,在內部具有收納所述齒輪2、齒輪3的齒輪收納室11a; 以及一個側板6,收容於所述齒輪收納室11a內;且在齒輪收納室11a的內側,齒輪2、齒輪3的一側面2a、側面3a與殼構造體1的前蓋12滑動接觸,並且另一側面2a、側面3a與側板6滑動接觸。詳細而言,殼構造體1與側板6分別具有滑動面12d、滑動面6d,該滑動面12d、滑動面6d在齒輪收納室11a的內側分別自前側及後側與齒輪2、齒輪3的側面2a、側面3a滑動接觸。換言之,在本實施方式中,在前蓋12形成有滑動面12d,該滑動面12d與齒輪2、齒輪3的前側的側面2a、側面3a滑動接觸。而且,滑動面12d與側面2a、側面3a滑動接觸的面積,即,自滑動面12d側推壓側面2a、側面3a的液壓的作用面積由圖4所示的軸承孔12b、軸承孔12c的直徑ΦB的尺寸設定而決定,換言之,如將該圖III部放大所示,由自軸承孔12b、軸承孔12c的端部12b1、端部12c1至齒底2b、齒底3b的距離即密封長度L12而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面12d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面12d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而且,所述作用力的大小與滑動面12d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L12的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L12越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向後側推壓的作用力越大。 That is, the gear pump of the present embodiment includes a gear 2, a gear 3, and a casing structure 1 having a gear housing chamber 11a that houses the gear 2 and the gear 3 therein; And a side plate 6 housed in the gear housing chamber 11a; and inside the gear housing chamber 11a, the gear 2, the one side surface 2a of the gear 3, and the side surface 3a are in sliding contact with the front cover 12 of the casing structure 1, and One side surface 2a and side surface 3a are in sliding contact with the side plate 6. Specifically, the case structure 1 and the side plate 6 respectively have a sliding surface 12d and a sliding surface 6d. The sliding surface 12d and the sliding surface 6d are on the inner side of the gear housing chamber 11a from the front side and the rear side, respectively, to the side of the gear 2 and the gear 3. 2a, the side surface 3a is in sliding contact. In other words, in the present embodiment, the front cover 12 is formed with a sliding surface 12d that is in sliding contact with the front side 2a and the side surface 3a of the gear 2 and the front side of the gear 3. Further, the area in which the sliding surface 12d is in sliding contact with the side surface 2a and the side surface 3a, that is, the acting area of the hydraulic pressure which presses the side surface 2a and the side surface 3a from the sliding surface 12d side is the diameter of the bearing hole 12b and the bearing hole 12c shown in FIG. ΦB is determined by the size setting, in other words, as shown in the enlarged view of FIG. III, the distance from the bearing hole 12b, the end portion 12b1 of the bearing hole 12c, the end portion 12c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the sealing length L12 And decided. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 12d and the side surface 2a and the side surface 3a, whereby the sliding surface 12d and the side surface 2a are always acted upon. The force that is separated by the side surface 3a, that is, the force of the side surface 2a and the side surface 3a is pressed. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 12d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L12. In other words, the longer the seal length L12 is, the larger the force acting on the rear side by pressing the side surface 2a and the side surface 3a by the operating fluid in the gear housing chamber 11a.

此外,在本實施方式中,側板6與所述第一實施方式呈對稱形狀,且形成有滑動面6d,該滑動面6d與齒輪2、齒輪3的後側的側面2a、側面3a滑動接觸。而且,滑動面6d與側面2a、側面3a滑動接觸的面積,即,自滑動面6d側推壓側面2a、側面3a的液壓的作用面積由圖4所示的軸承孔6b、軸承孔6c的直徑ΦS的尺寸設定而決定。換言之,如將圖3中的IV部放大所示,由自軸承孔6b、軸承孔6c的端部6b1、端部6c1至齒底2b、齒底3b的距離即密封長度L6而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面6d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面6d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而且,所述作用力的大小與滑動面6d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L6的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L6越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向前側推壓的作用力越大。 Further, in the present embodiment, the side plate 6 is symmetrical with the first embodiment, and a sliding surface 6d is formed in sliding contact with the side surface 2a and the side surface 3a of the rear side of the gear 2 and the gear 3. Further, the area in which the sliding surface 6d is in sliding contact with the side surface 2a and the side surface 3a, that is, the acting area of the hydraulic pressure that presses the side surface 2a and the side surface 3a from the sliding surface 6d side is the diameter of the bearing hole 6b and the bearing hole 6c shown in Fig. 4 . It is determined by the size setting of ΦS. In other words, as shown in an enlarged view of the IV portion in Fig. 3, the distance from the bearing hole 6b, the end portion 6b1 of the bearing hole 6c, the end portion 6c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the seal length L6 is determined. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 6d and the side surface 2a and the side surface 3a, whereby the sliding surface 6d and the side surface 2a are always acted upon. The force that is separated by the side surface 3a, that is, the force of the side surface 2a and the side surface 3a is pressed. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 6d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L6. In other words, the longer the seal length L6 is, the larger the force acting on the front side 2a and the side surface 3a against the front side caused by the operating fluid in the gear accommodation chamber 11a.

繼而,本實施方式的齒輪泵或馬達是在齒輪2、齒輪3與前蓋12之間的滑動性、及所述齒輪2、齒輪3與側板6之間的滑動性中,使作用於滑動性低的一側即與前蓋12面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積大於作用於滑動性高的一側即與側板6面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積。詳細而言,在與齒輪2、齒輪3的一側面2a、側 面3a滑動接觸的前側的一滑動面12d的滑動性、即壓鑄鋁的滑動性低於後側的另一滑動面6d的滑動性、即鉛或鉛青銅鑄件等原材料的滑動性的狀況下,使決定自一滑動面12d側作用於齒輪2、齒輪3的一側面2a、側面3a的液壓的作用面積的密封長度L12大於決定自另一滑動面6d側作用於齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積的密封長度L6。 Then, the gear pump or the motor of the present embodiment is in the slidability between the gear 2, the gear 3 and the front cover 12, and the slidability between the gear 2, the gear 3 and the side plate 6, and acts on the slidability. The lower side, that is, the gear 2 that faces the front cover 12, the side surface 2a of the gear 3, and the side surface 3a have a hydraulic action area larger than the side that acts on the side with high slidability, that is, the gear 2 that faces the side plate 6, and the gear 3 The hydraulic working area of the side surface 2a and the side surface 3a. Specifically, on the side 2a and the side of the gear 2 and the gear 3 The slidability of the sliding surface 12d on the front side of the surface 3a in sliding contact, that is, the slidability of the die-cast aluminum is lower than the slidability of the other sliding surface 6d on the rear side, that is, the slidability of a material such as lead or a lead bronze casting. The seal length L12 that determines the action area of the hydraulic pressure acting on the one side surface 2a and the side surface 3a of the gear 2, the gear 3 from the side of the sliding surface 12d is larger than the side surface 2a that acts on the gear 2 and the gear 3 from the other sliding surface 6d side. The sealing length L6 of the hydraulic working area of the side surface 3a.

藉此,如圖3所示,自前蓋12的滑動面12d側將齒輪2、齒輪3的側面2a、側面3a向後側推壓的作用力即液壓X大於自側板6的滑動面6d側將齒輪2、齒輪3的側面2a、側面3a向前側推壓的作用力即液壓Y。藉此,齒輪2、齒輪3被施加相當於液壓X與液壓Y的作用力的差分Z的力。結果為,自滑動性低的前蓋12產生的摩擦得以減輕。 As a result, as shown in FIG. 3, the hydraulic force X that is the force that presses the side surface 2a of the gear 2, the gear 3, and the side surface 3a toward the rear side from the sliding surface 12d side of the front cover 12 is larger than the sliding surface 6d side of the side plate 6 2. The force acting on the front side 2a of the gear 3 and the side 3a on the front side is the hydraulic pressure Y. Thereby, the gear 2 and the gear 3 are applied with a force corresponding to the difference Z between the hydraulic force X and the hydraulic force Y. As a result, the friction generated by the front cover 12 having a low slidability is alleviated.

在本實施方式中,僅藉由使軸承孔12b、軸承孔12c的直徑ΦF小於軸承孔6b、軸承孔6c的直徑ΦS,而如圖3中放大所示,使密封長度L12大於密封長度L6,藉此,使液壓作用的作用面積增大。 In the present embodiment, only by making the diameter ΦF of the bearing hole 12b and the bearing hole 12c smaller than the diameter ΦS of the bearing hole 6b and the bearing hole 6c, as shown enlarged in FIG. 3, the seal length L12 is made larger than the seal length L6, Thereby, the action area of the hydraulic action is increased.

此種實施方式亦與所述第一實施方式同樣地,實現有效地擔保機械效率及耐久性,且小型地構成的齒輪泵或馬達。 Also in this embodiment, as in the first embodiment, a gear pump or a motor that is configured to secure mechanical efficiency and durability and that is small in size is realized.

<第三實施方式> <Third embodiment>

所述各實施方式中揭示了如下的齒輪泵或馬達,即,藉由設為僅在前側或後側的任一側設置側板6並且在另一側不設置側板6的構成而小型地構成,但當然亦可設為在前側、後側的兩側均不 設置側板6的實施方式。換言之,亦可設為殼構造體1不具有側板6的構成。 In each of the above embodiments, a gear pump or a motor is disclosed which is configured to be small in size by providing the side plate 6 on either the front side or the rear side and the side plate 6 on the other side. But of course, it can also be set on both sides of the front side and the back side. An embodiment of the side panel 6 is provided. In other words, it is also possible to adopt a configuration in which the shell structure 1 does not have the side plates 6.

即,如圖5所示,本實施方式的齒輪泵或馬達包括:齒輪2、齒輪3;以及殼構造體1,在內部具有收納所述齒輪2、齒輪3的齒輪收納室11a,且具備滑動面12d、滑動面11d,該滑動面12d、滑動面11d在所述齒輪收納室11a的內側分別與齒輪2、齒輪3的兩側面2a、3a滑動接觸。換言之,所述齒輪泵在構成殼構造體1的主體11及前蓋12分別形成有滑動面11d、滑動面12d。而且,如圖5中放大所示,藉由將密封長度L11設定為大於密封長度L12,在作動中,會在前蓋12附近產生對齒輪2、齒輪3施加的力Z。 In other words, as shown in FIG. 5, the gear pump or the motor of the present embodiment includes a gear 2 and a gear 3, and a casing structure 1 having a gear housing chamber 11a in which the gear 2 and the gear 3 are housed, and has a sliding The surface 12d and the sliding surface 11d are in sliding contact with the gears 2 and the side surfaces 2a and 3a of the gear 3 on the inner side of the gear housing chamber 11a. In other words, the gear pump has a sliding surface 11d and a sliding surface 12d formed in the main body 11 and the front cover 12 that constitute the casing structure 1, respectively. Further, as shown in an enlarged view in FIG. 5, by setting the seal length L11 to be larger than the seal length L12, the force Z applied to the gear 2 and the gear 3 is generated in the vicinity of the front cover 12 during the operation.

具體地進行說明,在本實施方式中,在前蓋12,與所述第二實施方式同樣地形成有與齒輪2、齒輪3的前側的側面2a、側面3a滑動接觸的滑動面12d。而且,滑動面12d與側面2a、側面3a滑動接觸的面積,即,自滑動面12d側推壓側面2a、側面3a的液壓的作用面積由圖4所示的軸承孔12b、軸承孔12c的直徑ΦB的尺寸設定而決定,換言之,如該圖V部放大圖所示,由自軸承孔12b、軸承孔12c的端部12b1、端部12c1至齒底2b、齒底3b的距離即密封長度L12而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面12d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面12d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而 且,所述作用力的大小與滑動面12d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L12的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L12越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向後側推壓的作用力越大。 Specifically, in the present embodiment, the front cover 12 is formed with a sliding surface 12d that is in sliding contact with the front side surface 2a and the side surface 3a of the gear 2 and the front side 3a of the gear 3, similarly to the second embodiment. Further, the area in which the sliding surface 12d is in sliding contact with the side surface 2a and the side surface 3a, that is, the acting area of the hydraulic pressure which presses the side surface 2a and the side surface 3a from the sliding surface 12d side is the diameter of the bearing hole 12b and the bearing hole 12c shown in FIG. The size of ΦB is determined, in other words, as shown in the enlarged view of Fig. V, the distance from the bearing hole 12b, the end portion 12b1 of the bearing hole 12c, the end portion 12c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the sealing length L12 And decided. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 12d and the side surface 2a and the side surface 3a, whereby the sliding surface 12d and the side surface 2a are always acted upon. The force that is separated by the side surface 3a, that is, the force of the side surface 2a and the side surface 3a is pressed. and Further, the magnitude of the force is proportional to the area in which the sliding surface 12d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L12. In other words, the longer the seal length L12 is, the larger the force acting on the rear side by pressing the side surface 2a and the side surface 3a by the operating fluid in the gear housing chamber 11a.

而且,在本實施方式中,在所述主體11,與所述第一實施方式同樣地形成有與齒輪2、齒輪3的後側的側面2a、側面3a滑動接觸的滑動面11d。而且,滑動面11d與側面2a、側面3a滑動接觸的面積,即,自滑動面11d側推壓側面2a、側面3a的液壓的作用面積由軸承孔11b、軸承孔11c的直徑的設定而決定,且如對該圖VI部放大所示,由自軸承孔11b、軸承孔11c的端部11b1、端部11c1至齒底2b、齒底3b的距離即密封長度L11而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面11d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面11d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而且,所述作用力的大小與滑動面11d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L11的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L11越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向前側推壓的作用力越大。 Further, in the present embodiment, the main body 11 is formed with a sliding surface 11d that is in sliding contact with the side surface 2a and the side surface 3a of the rear side of the gear 2 and the gear 3, similarly to the first embodiment. Further, the area in which the sliding surface 11d is in sliding contact with the side surface 2a and the side surface 3a, that is, the area of the hydraulic pressure that presses the side surface 2a and the side surface 3a from the sliding surface 11d side is determined by the setting of the diameter of the bearing hole 11b and the bearing hole 11c. Further, as shown in an enlarged view of the portion VI of Fig. 6, the distance from the bearing hole 11b, the end portion 11b1 of the bearing hole 11c, the end portion 11c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the seal length L11 is determined. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 11d and the side surface 2a and the side surface 3a, whereby the sliding surface 11d and the side surface 2a are always acted upon. The force that is separated by the side surface 3a, that is, the force of the side surface 2a and the side surface 3a is pressed. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 11d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L11. In other words, the longer the seal length L11 is, the larger the force acting on the front side 2a and the side surface 3a on the front side by the operating fluid in the gear accommodation chamber 11a.

繼而,本實施方式的齒輪泵或馬達是在齒輪2、齒輪3 與主體11之間的滑動性、及所述齒輪2、齒輪3與前蓋12之間的滑動性中,使作用於滑動性低的一側即與主體11面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積大於作用於滑動性高的一側即與前蓋12面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積。詳細而言,在與齒輪2、齒輪3的一側面2a、側面3a滑動接觸的一滑動面11d的滑動性、即鑄鐵的滑動性低於另一滑動面12d的滑動性、即壓鑄鋁的滑動性的狀況下,使決定自一滑動面11d側作用於齒輪2、齒輪3的一側面2a、側面3a的液壓的作用面積的密封長度L11大於決定自另一滑動面12d側作用於齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積的密封長度L12。 Then, the gear pump or motor of the present embodiment is in the gear 2, the gear 3 In the slidability with the main body 11, and the slidability between the gear 2, the gear 3, and the front cover 12, the gear 2, the gear 3 that faces the main body 11 on the side with low slidability The hydraulic action area of the side surface 2a and the side surface 3a is larger than the hydraulic pressure acting area which acts on the side where the slidability is high, that is, the gear 2 which faces the front cover 12, the side surface 2a of the gear 3, and the side surface 3a. Specifically, the slidability of the sliding surface 11d which is in sliding contact with the one side surface 2a and the side surface 3a of the gear 2, the gear 3, that is, the slidability of the cast iron is lower than the slidability of the other sliding surface 12d, that is, the sliding of the die-cast aluminum. In the case of the performance, the seal length L11 of the hydraulic pressure acting on the one side surface 2a and the side surface 3a of the gear 2, the gear 3 is determined to be larger than the distance from the other sliding surface 12d to the gear 2. The sealing length L12 of the hydraulically acting area of the side surface 2a of the gear 3 and the side surface 3a.

藉此,如圖5所示,自主體11的滑動面11d側將齒輪2、齒輪3的側面2a、側面3a向前側推壓的作用力即液壓X大於自前蓋12的滑動面12d側將齒輪2、齒輪3的側面2a、側面3a向後側推壓的作用力即液壓Y。結果為,齒輪2、齒輪3被施加相當於液壓X與液壓Y的作用力的差分Z的力。結果為,自滑動性低的主體11產生的摩擦得以減輕。 As a result, as shown in FIG. 5, the hydraulic force X that is the force that presses the side surface 2a of the gear 2, the gear 3, and the side surface 3a from the sliding surface 11d side of the main body 11 is larger than the sliding surface 12d from the front cover 12 2. The force that pushes the side surface 2a of the gear 3 and the side surface 3a toward the rear side is the hydraulic pressure Y. As a result, the gear 2 and the gear 3 are applied with a force corresponding to the difference Z between the hydraulic force X and the hydraulic force Y. As a result, the friction generated by the main body 11 having low slidability is alleviated.

尤其是在本實施方式中,如圖6所示,僅藉由使軸承孔11b、軸承孔11c的直徑ΦB大於軸承孔12b、軸承孔12c的直徑ΦF,而如圖5中放大所示,使密封長度L11大於密封長度L12,藉此,使液壓作用的作用面積增大。 In particular, in the present embodiment, as shown in FIG. 6, only by making the diameter ΦB of the bearing hole 11b and the bearing hole 11c larger than the diameter ΦF of the bearing hole 12b and the bearing hole 12c, as shown in an enlarged view in FIG. The seal length L11 is larger than the seal length L12, whereby the action area of the hydraulic action is increased.

藉由如以上般構成,本實施方式的齒輪泵或馬達與所述 各實施方式同樣地有效地擔保機械效率及耐久性,且較所述各實施方式更小型。 By the above configuration, the gear pump or motor of the present embodiment is described Each embodiment is similarly effective in securing mechanical efficiency and durability, and is smaller than the above-described embodiments.

<第四實施方式> <Fourth embodiment>

如所述各實施方式所示,根據本發明,可使與齒輪的側面滑動接觸的原材料的選擇的範圍增大。即,如本實施方式所示,亦可將本發明應用於在齒輪的前側、後側均設置有側板6的齒輪泵或馬達。 As shown in each of the above embodiments, according to the present invention, the range of selection of the raw material that is in sliding contact with the side surface of the gear can be increased. That is, as described in the present embodiment, the present invention can also be applied to a gear pump or a motor in which the side plates 6 are provided on the front side and the rear side of the gear.

即,本實施方式的齒輪泵或馬達在齒輪2、齒輪3的前側、後側具有彼此大致呈對稱形狀的兩個側板6。而且,後側的側板6與所述實施方式同樣地由鉛或鉛青銅鑄件等原材料形成,另一方面,前側的側板6例如使用鐵板等滑動性較後側更低、換言之摩擦係數較後側更高的原材料。而且,與所述實施方式同樣地,該些成對的側板6分別形成有與齒輪2、齒輪3的前側、後側的側面2a、側面3a滑動接觸的滑動面61d、滑動面62d。而且,滑動面61d、滑動面62d與側面2a、側面3a滑動接觸的面積即液壓的作用面積由圖8所示的軸承孔6b、軸承孔6c的直徑ΦS1、直徑ΦS2的尺寸差而決定。換言之,如該圖VII部放大圖及VIII部放大圖所示,由自軸承孔6b、軸承孔6c的端部6b1、端部6c1至齒底2b、齒底3b的距離即密封長度L61、密封長度L62而決定。即,在齒輪泵的作動中,齒輪收納室11a內的高壓的作動液一直欲流入滑動面61d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面61d與側面2a、側面3a隔開的作用力,即,推壓側面2a、 側面3a的作用力。而且,所述作用力的大小與滑動面61d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L61的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L61越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向前側推壓的作用力越大。另一方面,所述作動液一直欲流入滑動面62d與側面2a、側面3a之間的間隙,藉此,一直作用有欲使滑動面62d與側面2a、側面3a隔開的作用力,即,推壓側面2a、側面3a的作用力。而且,所述作用力的大小與滑動面62d和側面2a、側面3a滑動接觸的面積成正比。而且,在本實施方式中,所述面積與以密封長度L62的尺寸為厚度的側視(未圖示)圓環狀的區域的大小成正比。即,所述密封長度L62越長,則齒輪收納室11a內的作動液所產生的將側面2a、側面3a向後側推壓的作用力越大。 That is, the gear pump or the motor of the present embodiment has the two side plates 6 having substantially symmetrical shapes with each other on the front side and the rear side of the gear 2 and the gear 3. Further, the side plate 6 on the rear side is formed of a material such as lead or a lead bronze casting as in the above-described embodiment. On the other hand, the side plate 6 on the front side is lower in sliding property than the rear side, for example, using an iron plate, in other words, the friction coefficient is later. Higher raw materials on the side. Further, similarly to the above-described embodiment, the pair of side plates 6 are respectively formed with a sliding surface 61d and a sliding surface 62d that are in sliding contact with the front side 2, the rear side surface 2a, and the side surface 3a of the gear 2, the gear 3. Further, the area of the sliding surface 61d and the sliding surface 62d that is in sliding contact with the side surface 2a and the side surface 3a, that is, the hydraulic pressure acting area is determined by the difference in size between the bearing hole 6b shown in FIG. 8 and the diameter ΦS1 and the diameter ΦS2 of the bearing hole 6c. In other words, as shown in the enlarged view of FIG. VII and the enlarged view of Section VIII, the distance from the bearing hole 6b, the end portion 6b1 of the bearing hole 6c, the end portion 6c1 to the tooth bottom 2b, and the tooth bottom 3b, that is, the seal length L61, is sealed. The length L62 is determined. That is, in the operation of the gear pump, the high-pressure actuating liquid in the gear housing chamber 11a always flows into the gap between the sliding surface 61d and the side surface 2a and the side surface 3a, whereby the sliding surface 61d and the side surface 2a are always acted upon. The force separating the side faces 3a, that is, pushing the side faces 2a, The force of the side 3a. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 61d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L61. In other words, the longer the seal length L61 is, the larger the force acting on the front side 2a and the side surface 3a against the front side caused by the operating fluid in the gear accommodation chamber 11a. On the other hand, the actuating liquid is always intended to flow into the gap between the sliding surface 62d and the side surface 2a and the side surface 3a, whereby the force for separating the sliding surface 62d from the side surface 2a and the side surface 3a is always applied, that is, The force of the side surface 2a and the side surface 3a is pressed. Further, the magnitude of the urging force is proportional to the area in which the sliding surface 62d and the side surface 2a and the side surface 3a are in sliding contact. Further, in the present embodiment, the area is proportional to the size of a side view (not shown) annular region having a thickness of the seal length L62. In other words, the longer the seal length L62 is, the larger the force acting on the rear side by pressing the side surface 2a and the side surface 3a by the operating fluid in the gear housing chamber 11a.

繼而,本實施方式的齒輪泵或馬達是在齒輪2、齒輪3與前側的側板6之間的滑動性、及所述齒輪2、齒輪3與後側的側板6之間的滑動性中,使作用於滑動性低的一側即與前側的側板6面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積大於作用於滑動性高的一側即與後側的側板6面對的齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積。詳細而言,在與齒輪2、齒輪3的一側面2a、側面3a滑動接觸的前側的一滑動面62d的滑動性、即鐵板的滑動性低於後側的另一滑動面61d的滑動性、即鉛或鉛青銅鑄件等原材料的滑動性的狀況下,使決定自一滑動面 62d側作用於齒輪2、齒輪3的一側面2a、側面3a的液壓的作用面積的密封長度L62大於決定自另一滑動面61d側作用於齒輪2、齒輪3的側面2a、側面3a的液壓的作用面積的密封長度L61。 Then, the gear pump or the motor of the present embodiment is in the slidability between the gear 2, the gear 3 and the front side plate 6, and the slidability between the gear 2, the gear 3, and the rear side plate 6, The side surface of the gear 2 that faces the side plate 6 on the front side, the side surface 2a of the gear 3, and the side surface 3a, the hydraulic pressure acting on the side having a low slidability is larger than the side surface of the rear side plate 6 that is higher on the side that is more slidable. The working area of the hydraulic pressure of the pair of gears 2, the side faces 2a of the gears 3, and the side faces 3a. Specifically, the slidability of the sliding surface 62d on the front side in sliding contact with the one side surface 2a and the side surface 3a of the gear 2, the gear 3, that is, the slidability of the iron plate is lower than the slidability of the other sliding surface 61d on the rear side. In the case of slidability of raw materials such as lead or lead bronze castings, the decision is made from a sliding surface. The seal length L62 of the hydraulic action area acting on the one side surface 2a and the side surface 3a of the gear 2, the gear 3, and the side surface 3a of the gear 3 is larger than the hydraulic pressure acting on the side surface 2a and the side surface 3a of the gear 2, the gear 3 from the other sliding surface 61d side. Sealing length L61 of the active area.

藉此,如圖7所示,自前側的側板6的滑動面62d側將齒輪2、齒輪3的側面2a、側面3a向後側推壓的作用力即液壓X大於自後側的側板6的滑動面61d側將齒輪2、齒輪3的側面2a、側面3a向前側推壓的作用力即液壓Y。藉此,齒輪2、齒輪3被施加相當於液壓X與液壓Y的作用力的差分Z的力。結果為,自滑動性低的前側的側板6產生的摩擦得以減輕。 As a result, as shown in FIG. 7, the hydraulic force X which is a force for pressing the side surface 2a of the gear 2, the gear 3, and the side surface 3a to the rear side from the side of the sliding surface 62d of the side plate 6 on the front side is larger than the sliding of the side plate 6 from the rear side. On the side of the surface 61d, the hydraulic force Y, which is the force that presses the side surface 2a of the gear 2, the gear 3, and the side surface 3a to the front side. Thereby, the gear 2 and the gear 3 are applied with a force corresponding to the difference Z between the hydraulic force X and the hydraulic force Y. As a result, the friction generated by the side plate 6 on the front side with low slidability is alleviated.

在本實施方式中,僅藉由使前側的軸承孔6b、軸承孔6c的直徑ΦS2相對小於後側的軸承孔6b、軸承孔6c的直徑ΦS1,而如圖7中放大所示,使密封長度L62大於密封長度L61,藉此,使液壓作用的作用面積增大。 In the present embodiment, the sealing length is made only by the diameter ΦS2 of the bearing hole 6b and the bearing hole 6c on the front side being relatively smaller than the diameter ΦS1 of the bearing hole 6b and the bearing hole 6c on the rear side, as shown in an enlarged view in FIG. L62 is larger than the seal length L61, whereby the action area of the hydraulic action is increased.

此種實施方式亦與所述各實施方式同樣地,實現有效地擔保機械效率及耐久性的齒輪泵或馬達。 Also in this embodiment, a gear pump or a motor that effectively secures mechanical efficiency and durability is realized in the same manner as the above-described respective embodiments.

以上,已對本發明的實施方式進行了說明,但各部的具體構成並不僅限定於所述實施方式,在不脫離本發明的主旨的範圍內可進行各種變形。 The embodiment of the present invention has been described above, and the specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the invention.

例如,在所述各實施方式中,揭示了一軸僅具備一齒輪的實施方式的齒輪泵或馬達,當然亦可將本發明應用於一軸具備兩齒輪的所謂雙聯式的液壓泵或馬達。在所述雙聯式的齒輪泵或馬達的情況下,亦可應用如下實施方式:省略一軸承側的軸襯, 使軸徑變小相當於該省略的尺寸,而增大密封長度即作用面積。 For example, in each of the above embodiments, a gear pump or a motor having an embodiment in which only one gear is provided is disclosed. Of course, the present invention can also be applied to a so-called double-coupled hydraulic pump or motor having two gears on one shaft. In the case of the duplex gear pump or motor, the following embodiment may also be applied: a bearing bushing on one bearing side is omitted. The smaller the shaft diameter is equivalent to the omitted size, and the seal length, that is, the active area is increased.

另外,齒輪、側板、進而軸襯的具體形態並不限定於所述實施方式的形態,包含既存的形態在內可應用各種形態。 Further, the specific form of the gear, the side plate, and the bushing is not limited to the embodiment of the above embodiment, and various forms can be applied including the existing form.

此外,各部的具體構成亦不限於所述實施方式,在不脫離本發明的主旨的範圍內可進行各種變形。 In addition, the specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the invention.

[產業上之可利用性] [Industrial availability]

本發明可作為用於產業用機械等的齒輪泵或馬達而使用。 The present invention can be used as a gear pump or a motor for an industrial machine or the like.

1‧‧‧殼構造體 1‧‧‧Shell structure

2‧‧‧齒輪(驅動齒輪) 2‧‧‧ Gears (drive gears)

3‧‧‧齒輪(從動齒輪) 3‧‧‧ Gears (driven gears)

2a、3a‧‧‧側面 2a, 3a‧‧‧ side

2b、3b‧‧‧齒底 2b, 3b‧‧‧ tooth bottom

2c、3c‧‧‧齒頂 2c, 3c‧‧‧ tooth top

4‧‧‧驅動軸 4‧‧‧Drive shaft

5‧‧‧從動軸 5‧‧‧ driven shaft

6‧‧‧側板 6‧‧‧ side panels

6b、6c‧‧‧軸承孔 6b, 6c‧‧‧ bearing holes

6b1、6c1‧‧‧端部 6b1, 6c1‧‧‧ end

6d、11d‧‧‧滑動面 6d, 11d‧‧‧ sliding surface

6e‧‧‧非滑動面 6e‧‧‧ non-sliding surface

6f‧‧‧墊圈槽 6f‧‧‧Way washer

7‧‧‧軸襯 7‧‧‧ Bushing

8‧‧‧墊圈 8‧‧‧Washers

11‧‧‧主體 11‧‧‧ Subject

11a‧‧‧齒輪收納室 11a‧‧‧ Gear storage room

11b、11c‧‧‧軸承孔 11b, 11c‧‧‧ bearing holes

11b1、11c1‧‧‧端部 11b1, 11c1‧‧‧ end

12‧‧‧前蓋 12‧‧‧ front cover

12b、12c‧‧‧軸承孔 12b, 12c‧‧‧ bearing holes

L6、L11‧‧‧作用面積(密封長度) L6, L11‧‧‧ area of action (seal length)

I、II‧‧‧放大部分 I, II‧‧‧Amplification

X、Y‧‧‧液壓 X, Y‧‧‧ hydraulic

Z‧‧‧力(液壓X與液壓Y的作用力的差分) Z‧‧‧ force (difference between the force of hydraulic X and hydraulic Y)

Claims (3)

一種齒輪泵或馬達,包括:齒輪對,相互嚙合而成;殼構造體,在內部具有收納所述齒輪對的齒輪收納室;以及一個側板,收容於所述齒輪收納室在所述齒輪收納室的內側,所述齒輪對的一側面與所述殼構造體滑動接觸,並且所述齒輪對的另一側面與所述側板滑動接觸,所述齒輪泵或馬達的特徵在於:在所述齒輪對與所述殼構造體之間的滑動性、及所述齒輪對與所述側板之間的滑動性中,使作用於滑動性低的一側的齒輪側面的液壓的作用面積大於作用於滑動性高的一側的齒輪側面的液壓的作用面積。 A gear pump or motor comprising: a pair of gears meshed with each other; a shell structure having a gear housing chamber for housing the pair of gears therein; and a side plate housed in the gear housing chamber in the gear housing chamber On the inner side, one side of the pair of gears is in sliding contact with the shell structure, and the other side of the pair of gears is in sliding contact with the side plate, the gear pump or motor being characterized by: In the slidability with the shell structure and the slidability between the gear pair and the side plate, the action area of the hydraulic pressure acting on the side surface of the gear having the lower slidability is greater than the slidability The hydraulic side of the gear on the side of the high side. 一種齒輪泵或馬達,包括:齒輪對,相互嚙合而成;以及殼構造體,在內部具有收納所述齒輪對的齒輪收納室,且在所述齒輪收納室的內側與所述齒輪對的兩側面分別滑動接觸,所述齒輪泵或馬達的特徵在於:在所述齒輪對與所述殼構造體之間的滑動性中,使作用於滑動性低的一側的齒輪側面的液壓的作用面積大於作用於滑動性高的一側的齒輪側面的液壓的作用面積。 A gear pump or motor comprising: a pair of gears meshed with each other; and a casing structure having a gear housing chamber accommodating the gear pair therein, and two inside the gear accommodation chamber and the gear pair The side surface is in sliding contact, respectively, and the gear pump or the motor is characterized in that, in the slidability between the gear pair and the casing structure, the acting area of the hydraulic pressure acting on the side of the gear on the side with low slidability It is larger than the acting area of the hydraulic pressure acting on the side of the gear on the side where the slidability is high. 一種齒輪泵或馬達,包括:齒輪對,相互嚙合而成; 殼構造體,在內部具有收納所述齒輪對的齒輪收納室;以及兩個側板,配置成在所述齒輪收納室的內側分別與所述齒輪對的兩側面滑動接觸;所述齒輪泵或馬達的特徵在於:在所述齒輪對與所述兩個側板之間的滑動性中,使作用於滑動性低的一側的齒輪側面的液壓的作用面積大於作用於滑動性高的一側的齒輪側面的液壓的作用面積。 A gear pump or motor comprising: a pair of gears that are meshed with each other; a shell structure having a gear housing chamber that houses the pair of gears therein; and two side plates that are disposed to be in sliding contact with both side faces of the gear pair on an inner side of the gear housing chamber; the gear pump or motor The slidability between the pair of gears and the two side plates is such that the hydraulic pressure acting on the side of the gear having the lower slidability is larger than the gear acting on the side having the higher slidability. The hydraulic working area of the side.
TW104115869A 2014-05-28 2015-05-19 Gear pump or motor TWI586892B (en)

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JPH0515592Y2 (en) * 1986-08-12 1993-04-23
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JP2013181446A (en) * 2012-03-01 2013-09-12 Sumitomo Precision Prod Co Ltd Hydraulic device
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