Patents Assigned to Kanzaki Kokyukoki Mfg. Co., Ltd.
  • Patent number: 12179514
    Abstract: Disclosed is a power transmission unit including a motor case that is provided on the same side as a second axle with respect to a center between a first axle and the second axle, separated to right and left, in a right-left direction and that houses the electric motor, a first axle case housing a reduction gear mechanism, a differential gear mechanism, and the first axle, and a second axle case that is fixed to the first axle case in a separable manner and houses the second axle.
    Type: Grant
    Filed: March 31, 2023
    Date of Patent: December 31, 2024
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Koji Kiyooka, Ryo Motooka, Ken Morishita, Hitoshi Sawada, Akihiro Ima
  • Patent number: 12173791
    Abstract: [Problem] A power transmission unit that improves quietness of a gear mechanism and prevents a size of the unit from increasing when a brake rotor is installed around an input shaft of the gear mechanism. [Solution] The power transmission unit includes an electric driving motor with a motor shaft, a gear mechanism, and an output shaft, which are accommodated in a transmission housing, wherein the power of the motor shaft is transmitted to the output shaft via the gear mechanism. The gear mechanism has a gear shaft rotatably supported on the transmission housing and a first helical gear provided on the gear shaft. The power transmission unit further includes a connecting member provided with a tubular portion fitted to the motor shaft and the gear shaft so as to allow the motor shaft and the gear shaft to synchronously rotate. The connecting member is integrally provided with a brake rotor on the outer periphery thereof.
    Type: Grant
    Filed: February 24, 2023
    Date of Patent: December 24, 2024
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Koji Kiyooka, Ryo Motooka, Ken Morishita, Hitoshi Sawada, Akihiro Ima
  • Patent number: 12161061
    Abstract: An electric vehicle includes a body frame, a seat disposed on the body frame, a wheel attached to the body frame to be driven by an electric motor, a battery to supply electric power to the electric motor via an inverter and an electrical component, a plate member placed inside a covered space with a top being covered and on which the inverter and the electrical component are mounted, and a guide supported by the body frame to drawably guide the plate member from a position inside the covered space to a position outside the covered space.
    Type: Grant
    Filed: February 17, 2022
    Date of Patent: December 10, 2024
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Takashi Nishizawa, Kohei Ogura, Masato Arata, Daisuke Kono
  • Patent number: 12072008
    Abstract: In a transmission structure according to this invention, speed change ratios of input side first and second transmission mechanisms are set so that the rotational speed of a planetary second element is the same when an HST output is set to a second HST speed in either a first transmission state or a second transmission state, and the rotational speed of a planetary first element is the same when the HST output is set to the second HST speed in either the second transmission state or the first transmission state. The speed change ratios of an output side first and second transmission mechanisms are set so that the rotational speed developed in a speed change output shaft when the HST output is set to the second HST speed is the same in either the first or second transmission states.
    Type: Grant
    Filed: August 9, 2023
    Date of Patent: August 27, 2024
    Assignee: Kanzaki Kokyukoki Mfg. Co., LTD.
    Inventors: Koji Iwaki, Kazuhiro Owada, Kengo Sasahara
  • Patent number: 12062971
    Abstract: A moving body driving unit includes: a casing; an electric motor placed in a motor storage portion formed in an inner side of the casing on one side in a first direction which is predetermined and that has a motor shaft which extends in the first direction; a gear device placed in a gear storage portion formed in the inner side of the casing on the other side in the first direction and which also functions as an oil reservoir; a motive power transmitting mechanism placed at the inner side of the casing and that transmits motive power between the motor shaft and the gear device; an oil passage that interconnects the motor storage portion and the gear storage portion at the inner side of the casing; an oil introduction port; an oil discharge port; and an external oil path.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: August 13, 2024
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Koji Kiyooka, Takashi Nishizawa, Kousaku Kita, Tasuku Inoue, Tatsuya Kamada
  • Patent number: 12005787
    Abstract: A lawn mower includes a traveling driver, a mower motor, and at least one controller. At least one controller is configured to control the traveling driver in accordance with an operation of a user getting on the lawn mower, control the traveling driver to cause the lawn mower to travel autonomously, on a basis of information detected on the lawn mower, and control the mower motor. The lawn mower includes a lawn detection device configured to detect a condition of a portion of lawn on a front side in a traveling direction, and a position acquisition device configured to acquire self-position information. The at least one controller controls the traveling driver in such a manner that the lawn mower preferentially travels on a portion of lawn that needs to be mowed.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: June 11, 2024
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Koji Kiyooka, Takashi Nishizawa, Hidetaka Yamanami, Shigeaki Nakagawa, Kengo Sasahara, Hikari Morita, Kohei Ogura
  • Patent number: 12000467
    Abstract: A pump operation piston biased by a neutral spring mechanism and a larger volume operation spring biased by a larger volume operation spring in a larger volume direction operatively move pump and motor volume adjusting members, respectively, is provided. A first pressure control valve commonly controls supply-discharge of pressure oil that presses the pump operation piston in a first slide direction and the motor operation piston in a smaller volume direction. A second pressure control valve controls supply-discharge of pressure oil that presses the pump operation piston in a second slide direction. Biasing forces of the neutral spring mechanism and the larger volume operation spring are so set that, after the pump operation piston is moved in the first slide direction by a predetermined distance, the motor operation piston starts moving.
    Type: Grant
    Filed: August 11, 2022
    Date of Patent: June 4, 2024
    Assignee: Kanzaki Kokyukoki Mfg. Co., LTD
    Inventors: Koji Iwaki, Tomoyuki Tsuji
  • Patent number: 11994170
    Abstract: A differential gear includes a holder which is provided between first and second pinion gears in a differential case and through which a differential pinion shaft is inserted. An insertion hole is radially formed in the differential pinion shaft. The holder is formed with a fixing hole facing the insertion hole when the differential pinion shaft is inserted through the holder. Due to insertion of a fixing pin through the fixing hole and the insertion hole, the differential pinion shaft and the holder are relatively non-rotatable. Due to the holder being held between first and second side gears, relative rotation of the holder with respect to the differential case is restricted, and the differential pinion shaft is non-rotatable relative to the differential case.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: May 28, 2024
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventor: Toshiyuki Fukuda
  • Patent number: 11933391
    Abstract: An HST of the present invention includes a main plate and a sub-plate supporting a center section, a pump-side swash plate holder and a motor-side swash plate holder by their inner surfaces facing each other. The main plate is provided with an extended region that extends farther outward in a planar direction of the main plate than an installation space of the center section, the pump-side swash plate holder and the motor-side swash plate holder and than the sub-plate as viewed along a direction in which the main plate and the sub-plate face each other.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: March 19, 2024
    Assignee: Kanzaki Kokyukoki Mfg. Co., LTD.
    Inventors: Kazuhiro Owada, Koji Iwaki, Kengo Sasahara
  • Patent number: 11841067
    Abstract: A transmission structure of the present invention changes capacity of pump body so that vehicle speed detected by vehicle speed sensor increases and reduces according to speed-increasing and speed-reducing operations of speed-change operating member while fixing capacity of motor body at a low-speed motor capacity when the vehicle speed is equal to or lower than a switching speed that is realized by setting motor body to the low-speed motor capacity and setting the pump body to a predetermined pump switching capacity, and changes capacity of motor body so that vehicle speed increases and reduces in accordance with speed-increasing and speed-reducing operations of speed-change operating member while fixing capacity of the pump body at the pump switching capacity when vehicle speed is higher than the switching speed.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: December 12, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., LTD
    Inventors: Kazuhiro Owada, Koji Iwaki
  • Patent number: 11793113
    Abstract: A transaxle with a brake of the present invention includes the braking device comprising a plurality of brake discs, fixing plates, and a brake operating member, wherein the brake discs have an inner gear tooth portion that can be fitted to an outer gear tooth portion of an output gear of the motor shaft so as not to rotate relative to the outer gear tooth portion and is slidably fixed in the axial direction of the motor shaft, wherein the fixing plates are fixed to the transaxle casing so as not to rotate relative to each other and are slidably fixed in the axial direction of the motor shaft, and wherein the brake operating member provides a predetermined gap between the fixing plates and the brake discs when the brake discs are not pressed.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: October 24, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Mai Terada, Koji Kiyooka
  • Patent number: 11796041
    Abstract: [Problem] To provide a planetary gear assembly that, while increasing the speed change range of a power-split stepless transmission formed in cooperation a stepless transmission, can reduce the overall size of the power-split stepless transmission. [Solution] The planetary gear assembly according to the present invention includes: a cylindrical transmission shaft, an output shaft inserted into the transmission shaft, first and second planetary gear mechanisms each having a first sun gear supported to the transmission shaft without a relative rotation about an axial line, first and second clutch mechanisms that are placed coaxially with the transmission shaft, and that engage and disengage a power transmission of power to standard rotary speed power input units of the first and second planetary gear mechanisms, and a connection member extrapolated to the transmission shaft with a free relative rotation about an axial line.
    Type: Grant
    Filed: February 14, 2023
    Date of Patent: October 24, 2023
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Terunobu Yoshioka, Koji Iwaki
  • Patent number: 11767904
    Abstract: In a transmission structure according to this invention, speed change ratios of input side first and second transmission mechanisms are set so that the rotational speed of a planetary second element is the same when an HST output is set to a second HST speed in either a first transmission state or a second transmission state, and the rotational speed of a planetary first element is the same when the HST output is set to the second HST speed in either the second transmission state or the first transmission state. The speed change ratios of an output side first and second transmission mechanisms are set so that the rotational speed developed in a speed change output shaft when the HST output is set to the second HST speed is the same in either the first or second transmission states.
    Type: Grant
    Filed: January 13, 2023
    Date of Patent: September 26, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Koji Iwaki, Kazuhiro Owada, Kengo Sasahara
  • Patent number: 11746880
    Abstract: A motor reducer of the at least an embodiment of the present invention includes a reduction gear train that decelerates rotation input from a motor, and a reducer casing that accommodates the reduction gear train. An input cover that seals a motor-side end face of the reducer casing is provided, and the input cover is provided separately from the motor casing.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: September 5, 2023
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Mai Terada, Koji Kiyooka
  • Patent number: 11668381
    Abstract: A transmission structure of the present invention causes, during a period from a time point when a rotational speed of a drive rotational power reaches a predetermined first/second speed stage shift-up start speed until a first/second speed stage shift-up end time point, one of an input-side clutch mechanism pair and an output-side clutch mechanism pair to be in a double transmitting state, and causes, in the double transmitting state, a first clutch mechanism and a second clutch mechanism of the other one of the input-side clutch mechanism pair and the output-side clutch mechanism pair to be shifted to a disengagement sate and an engagement state, respectively, while having frictional plate slid.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: June 6, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Kazuhiro Owada, Koji Iwaki, Ryo Motooka, Kohei Ogura, Takumi Takahashi
  • Patent number: 11649879
    Abstract: A portal unit is provided. The portal unit includes a deceleration gear train and a housing. The housing includes an inner side wall that is formed with an input opening at a position above a rotation axial line of a driving wheel, an outer side wall that is formed with an output opening at a coaxial position with the rotation axial line of the driving wheel, and an intermediate wall that connects peripheral edges of the inner side wall and the outer side wall. The inner side wall is provided, at a radially outward position of the input opening, with mount bolts for the suspension unit. The mount bolts each include a shaft portion protruding inwardly in a vehicle width direction.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: May 16, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., LTD.
    Inventors: Toshiyuki Fukuda, Yuki Hashimoto, Keith Johnson Andrews
  • Patent number: 11644091
    Abstract: A hydromechanical continuously variable speed transmission is provided. The hydromechanical continuously variable speed transmission can include: the HST 10 in which the planetary gear mechanism 11 is housed in the planetary gear support case 71 mounted on a face of the center section 35 to form the HMT unit 100, the face being on the side opposite to the side on which the HST case 23 is mounted, and the HMT unit 100 is further provided with the housing mounting face 35d for fixing the HMT unit 100 to the housing 91 of the traveling power transmission mechanism 89, the housing mounting face 35d being provided on the center section 35 so as to surround the outer circumference of the mounting face 71a on which the planetary gear support case 71 is mounted.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: May 9, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Koji Iwaki, Tomoyuki Tsuji, Ryo Motooka
  • Patent number: 11572939
    Abstract: In a transmission structure according to this invention, speed change ratios of input side first and second transmission mechanisms are set so that the rotational speed of a planetary second element is the same when an HST output is set to a second HST speed in either a first transmission state or a second transmission state, and the rotational speed of a planetary first element is the same when the HST output is set to the second HST speed in either the second transmission state or the first transmission state. The speed change ratios of an output side first and second transmission mechanisms are set so that the rotational speed developed in a speed change output shaft when the HST output is set to the second HST speed is the same in either the first or second transmission states.
    Type: Grant
    Filed: November 15, 2021
    Date of Patent: February 7, 2023
    Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd.
    Inventors: Koji Iwaki, Kazuhiro Owada, Kengo Sasahara
  • Patent number: 11554658
    Abstract: A hybrid vehicle includes an engine that drives first wheel, and a motor that drives second wheel. The hybrid vehicle includes (1) a minute speed launch support mode where the hybrid vehicle is driven only by the motor as a drive source, (2) a sudden launch support mode where the hybrid vehicle is driven by the engine and motor as the drive source, and (3) a smooth launch support mode where the hybrid vehicle is driven only by the motor as the drive source in an early stage, is driven by the engine and motor in a middle stage, and is driven only by the engine in a late stage, and if an operation amount of an acceleration instruction unit is not 0 or is substantially not 0, any one of the support modes is executed according to an operation status of the acceleration instruction unit.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: January 17, 2023
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Fumiaki Ito, Koji Kiyooka, Tasuku Inoue, Masato Arata
  • Patent number: 11547051
    Abstract: A hydrostatic transaxle includes: a casing that is provided with an openable and closable filter insertion port and is filled with hydraulic oil; a hydraulic continuously variable transmission that is arranged inside the casing; a filter holding member that includes a support base that is a hollow cylindrical portion and oil-tightly partitions an inside of a cylinder and an outside of the cylinder, and a filter connection port that is a hollow cylindrical portion extending from a peripheral side surface of the support base and communicating with the inside of the cylinder, the support base communicating the inside of the cylinder to the port, and arranged between the center section and the casing facing the port; and a filter body that is freely inserted to and removed from the casing via the filter insertion port.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: January 10, 2023
    Assignee: KANZAKI KOKYUKOKI MFG. CO., LTD.
    Inventors: Toshifumi Yasuda, Hiroshi Sugimoto, Daisuke Murashima, Masaru Iida, Koji Iwaki