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1. 发明专利

JP2002048074A INTERNAL GEAR PUMP 失效
公开(公告)号：JP2002048074A
公开(公告)日：2002-02-15
申请号：JP2000229763
申请日：2000-07-28
申请人： TOYODA MACHINE WORKS LTD , TOYOOKI KOGYO KK , TOYOTA MOTOR CORP
发明人： FUJIWARA EIJU , YAMAMORI MOTOYASU , ITO ATSUSHI , YAO HIROYUKI , SASAKI KOJI , HONDA ATSUSHI , YASUE HIDEKI , KASUGA SHINJI , MORIOKA KOJI
IPC分类号： F04C2/10
摘要： PROBLEM TO BE SOLVED: To provide an internal gear pump capable of surely preventing the seizure between an outer gear and a housing while realizing the reduction of costs. SOLUTION: Each housing 2 and 3 has a suction side bridge 1f for preventing the facing of a slide-contact part between the rear housing 2 and an outer gear 8 to a suction passage 1d, and a part of a suction port 1b diagonally formed in relation to a discharge port 1d forms a suction range 1h facing to the slide-contact part of the outer gear 8 so as to suck the outer gear 8.

2. 发明专利

JP2000291566A INTERNAL GEAR PUMP 失效
公开(公告)号：JP2000291566A
公开(公告)日：2000-10-17
申请号：JP9833599
申请日：1999-04-06
申请人： TOYOOKI KOGYO KK
发明人： ISHIKAWA KATSUNORI , SASAKI KOJI
IPC分类号： F04C2/10
摘要： PROBLEM TO BE SOLVED: To provide an internal gear pump capable of preventing the outer circumferential surface of an internal gear and the inner circumferential surface of a housing recessed part from wearing out abnormally, and of preventing seizure of the internal gear. SOLUTION: A circular arc-shaped suction port 12 is formed dented over one end surface 5A of a lid member 5 fastened and provided for a pump housing 1 in such a way that the opening of a housing recessed part 4, and an oil path 14 to be communicated with the path entrance 10A of a suction port 10 by making a detour around the opening of the housing recessed part 4 is formed, while being connected with the bottom part of the suction port 12 in a range, and the turning of the oil path 14 thereby allows a wall part 5B covering a very fine gap between the inner circumferential surface of the housing recessed part 4 and the outer circumferential surface 2A of an internal gear 2 to be provided for one end surface 5A of the lid member 5, while facing the wall parts 1C and 1D of the pump housing 1. This constitution thereby prevents oil to be sucked in, when it flows in the oil path 14 from being directly into contact with the every fine gap between the inner circumferential surface 4A of the housing recessed part 4 and the outer circumferential surface 2A of the internal gear 2, so that dust can thereby be prevented from ingressing in the very fine gap.

3. 发明专利

JPH0771373A INTERNAL GEAR PUMP 失效
公开(公告)号：JPH0771373A
公开(公告)日：1995-03-14
申请号：JP24040293
申请日：1993-08-31
申请人： TOYOOKI KOGYO KK
发明人： SASAKI KOJI
IPC分类号： F04C2/10
摘要： PURPOSE:To restrain the length of an inner ring in the rotational direction in order to separate the trailing end of an intake port from the side end of an intake range of e partition piece and to improve cavitation performance by arranging the trailing end of the intake port within a specified angle area in the antirotational direction of the inner ring from the side of the partition piece of a line connecting each of the centers of both of the inner and outer rings. CONSTITUTION:An internal tooth and an external tooth engaged with each other are released from engagement on a line O2-B. From the side of the deepest engagement part of each of lines Al, A2 extending in the diametrical direction by way of connecting each of central points O1, O2 of an inner ring and an outer ring, at an angle (d) reaching the line O2-B in the rotational direction of the inner ring, engagement is released. The angle (d) of a line A2-O2-B exceeds 90 deg.. In this case, the trailing end of an intake port 6 is arranged within an angle (e) of 60 deg.-70 deg. in the antirotational direction of the inner ring from the side of a partition piece 5 of each line A1-A2 connecting each of the central points O1, O2 on a line O2 That is, the angle (e) of a line Al-O2-D is set within 60 deg.-70 deg.. Consequently, liquid is restrained as it does not reach a position to flow it out, and it is possible to restrain generation of cavitation until high engine speed is reached.

4. 发明专利

JPH07151065A INTERNAL GEAR PUMP 失效
公开(公告)号：JPH07151065A
公开(公告)日：1995-06-13
申请号：JP32984993
申请日：1993-11-30
申请人： TOYOOKI KOGYO KK
发明人： SASAKI KOJI
IPC分类号： F04C2/10 , F04C14/24 , F04C15/00 , F04C15/06 , F04C15/04
摘要： PURPOSE:To enable separation of bubbles on an inner surface of a seal piece in a pump in which a section area is separated from a discharge area by means of the seal piece on which teeth of internal and external gears are in contact by forming a cutout which forms an inclined edge and is always communicated with the discharge area. CONSTITUTION:In an internal gear pump, remarkable cavitation is generated in a suction area 9 and a lot of bubbles are generated in the case that rotational speed of a driving shaft is high. A cutout 14 is formed on an end of a seal piece 8 on the side of a discharge area 10, which cutout is formed by inclinedly chipping an end of the seal piece 8 to a bottom wall 4A of a recession 4. Pressure liquid is introduced inside the seal piece 8 over all an area thereof in a height direction through an inclined line 15A. The bubbles in contact with the inner surface of the seal piece 8 are removed by the introduced pressure liquid from the inner surface. It is thus possible to prevent the bubbles from being broken in the vicinity of the inner surface of the seal piece 8, and prevent occurrence of errosion on the inner surface of the seal piece 8.

5. 发明专利

JP2001032778A INTERNAL GEAR PUMP 失效
公开(公告)号：JP2001032778A
公开(公告)日：2001-02-06
申请号：JP20856099
申请日：1999-07-23
申请人： TOYOOKI KOGYO KK
发明人： SASAKI KOJI , WADA MAKOTO
IPC分类号： F04C2/10 , F04C15/00
摘要： PROBLEM TO BE SOLVED: To restrict generation of seizure of an external gear by eliminating engagement of a tip ridge part of a drive shaft with the external gear for reducing axial pressure to the external gear by the drive shaft. SOLUTION: A spline 7B to be engaged with a drive shaft 15 for rotation drive force of the drive shaft 15 to be transmitted is formed on one end side in the axial direction of an external gear 7, a recessed part 7C is formed at a place where a diametric inner ridge part 15B at a tip of the drive shaft 15 is positioned to be continuous with the inner side in the axial direction of the spline 7B, and the recessed part 7C is provided to be contactless to the diameter inner ridge part 15B. When rotation drive and stop of the drive shaft 15 are repeated, a dent where the diametric inner ridge part 15B at the tip of the drive shaft 15 is engaged is not generated in the external gear 7, the diameter inner ridge part 15B at the edge of the drive shaft 15 is prevented from being engaged with the external gear 7 even when the drive shaft 15 is moved axially toward the external gear 7 while a pump is actuated, and pressure of the drive shaft 15 in the axial direction of the external gear 7 can be reduced, thereby generation of seizure of the external gear 7 can be restricted.

6. 发明专利

JP2000303966A INTERNAL GEAR PUMP 失效
公开(公告)号：JP2000303966A
公开(公告)日：2000-10-31
申请号：JP11615799
申请日：1999-04-23
申请人： TOYOOKI KOGYO KK
发明人： ISHIKAWA KATSUNORI , YAMAGUCHI HIDENOBU , SASAKI KOJI
IPC分类号： F04C2/10
摘要： PROBLEM TO BE SOLVED: To restrain lowering of a mechanical efficiency by adjusting pressure applied to an internal gear in the radial direction so that an internal gear is prevented from being pressed onto the inner circumferential surface of a housing recessed part toward the outside in the radial direction of a discharge port. SOLUTION: A groove 16 opened along the outer circumferential surface 2A of an internal gear is formed so as to be dented at one end surface of a lid member on the outer side in the radial direction of a discharge port 9(13) so that the groove 16 is communicated with the discharge port 9 through a communication groove 17. By this constitution, against action force acting on the inner circumferential surface 2B of an internal gear 2 outward in the radial direction based on the pressure of high pressure oil in the discharging area P2 of a pump chamber P, acting force based on the pressure of high pressure oil of the discharge port 9(13) to be introduced in the groove 16, acts on the outer circumferential surface 2A of the internal gear 3 inward in the radial direction, acting force based on the pressure of high pressure oil can be acted onto the internal gear 2 oppostely in the radial direction, and the internal gear 2 is prevented from being pressed onto the inner circumferential surface 4A of a housing recessed part 4 outward in the radial direction.

7. 发明专利

JPH06280751A INTERNAL CONTACT GEAR PUMP 失效
公开(公告)号：JPH06280751A
公开(公告)日：1994-10-04
申请号：JP9534793
申请日：1993-03-29
申请人： TOYOOKI KOGYO KK
发明人： SEKINE SADAO , SASAKI KOJI
IPC分类号： F04C2/10
摘要： PURPOSE:To improve suction performance of an internal contact gear pump having a cresent-form seal piece. CONSTITUTION:The end on the suction chamber 10 side of a seal piece 9 and the end on the rotation direction side of a suction port 12 are placed closer to the rotation direction side than a position P where internal and external teeth 5 and 7 is released from engagement therebetween. The suction port is formed such that a depth on the rotation direction side is gradually decreased to a value lower than that in the position P in a rotation direction starting from the counter rotation direction side.

8. 发明专利

JPH06117379A INTERNAL GEAR PUMP 失效
公开(公告)号：JPH06117379A
公开(公告)日：1994-04-26
申请号：JP28661492
申请日：1992-09-30
申请人： TOYOOKI KOGYO KK
发明人： SEKINE SADAO , SASAKI KOJI
IPC分类号： F04C2/10
摘要： PURPOSE:To prevent the contact with the edge wall of a pump chamber of an internal gear or external gear of an internal gear pump in which the internal gear is connected with a driving shaft so as to enable the relative shift in the axial direction. CONSTITUTION:On the edge surface of each tooth of an internal gear 7 or external gear 6, a recess 17 opened to the tooth groove at the edge on the front side in the revolution direction is formed.

9. 发明专利

JPH0587058A INSCRIBED GEAR PUMP 失效
公开(公告)号：JPH0587058A
公开(公告)日：1993-04-06
申请号：JP28042691
申请日：1991-09-30
申请人： TOYOOKI KOGYO KK
发明人： ISHIKAWA KATSUNORI , SASAKI KOJI
IPC分类号： F04C2/10 , F04C14/24
摘要： PURPOSE:To restrict an increase in the torque of a drive shaft by restricting an increase in discharge as revolution is increased at the high revolution area of the drive shaft without generating air bubbles. CONSTITUTION:An external tooth gear 5 is rotatably coupled in an intermediate member 4 incorporated while being rotatably connected to a drive shaft 3, so that the torque of the drive shaft 3 is transmitted to the external tooth gear 5 via the spring force of springs 6A and 6B provided while being interposed between the external tooth gear 5 and the intermediate member 4. In the low revolution area of the drive shaft 3 whose torque is smaller than the spring force of the springs 6A and 6B, a space between both mutually adjacent communication passages 15 is cut off by a communication cut-off path 16, so that discharge is increased roughly in proportion to an increase in the revolution of the drive shaft 3. Meanwhile, in the high revolution area of the drive shaft 3 whose torque is greater than the spring force of the springs 6A and 6B, the space between both the mutually adjacent communication passages 15 is communicated by the communication cut-off path 16 with both the external tooth gear 5 and the intermediate member 4 rotated relatively, and a part of fluid at a delivery port 13 side is circulated to an intake port 12 side, so that an increase in the revolution of the drive shaft 3 is restricted with an increase in discharge restricted as revolution is increased.

10. 发明专利

JPH03130570A TRAPPER AND CAPTURE ABSORBING AGENT AND UNIT FOR FUEL OR THE LIKE 失效
公开(公告)号：JPH03130570A
公开(公告)日：1991-06-04
申请号：JP5472190
申请日：1990-03-06
申请人： TOYOTA CENTRAL RES & DEV , TOYODA GOSEI KK , TOYOTA MOTOR CORP
发明人： KURAUCHI NORIO , OKADA AKANE , HIROSE MIHARU , OTA TAKASHI , MATSUSHITA MITSUMASA , OHASHI TAMIYOSHI , MIZUNO MASAMI , AOKI TOMOHIDE , OKUMOTO TADAOKI , SASAKI KOJI , ITO HIROSHI , NODA FUMIYOSHI , MORIMITSU NOBUTAKA
IPC分类号： F02M25/08
摘要： PURPOSE:To increase ability of capture-absorbing fuel or the like by using an organic high molecule, which has nature of dissolving or swelling in fuel further with good heat resistance, as an absorbing agent for capturing the fuel or the like received in a trapper vessel such as a canister. CONSTITUTION:An automobile canister 1 is formed of a granular absorbing agent 2 and a main unit 10 which is a vessel for housing this absorbing agent 2, and in the main unit 10, the first and second introducing pipes 13, 14 and a purge pipe 16 are fixed to 4 cover unit 11, provided in the upper end of the main unit 10, with a point end part 141 of the second introducing pipe 14 inserted to a position in the vicinity of the center of the main unit 10. Here as the absorbing agent 2, an organic high molecule, having nature of dissolving or swelling in fuel further with good heat resistance, for instance, polycarbonate resin, acrylic resin, ABS resin, acetal resin, etc., is used. This absorbing agent is formed in a shape with a diameter or thickness in about 3mm or less so that absorption is advanced to the center part.

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