WO2016127472A1 - Boîte d'engrenages à changement de vitesse applicable à un outil électrique de type à batterie - Google Patents

Boîte d'engrenages à changement de vitesse applicable à un outil électrique de type à batterie Download PDF

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Publication number
WO2016127472A1
WO2016127472A1 PCT/CN2015/075278 CN2015075278W WO2016127472A1 WO 2016127472 A1 WO2016127472 A1 WO 2016127472A1 CN 2015075278 W CN2015075278 W CN 2015075278W WO 2016127472 A1 WO2016127472 A1 WO 2016127472A1
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WO
WIPO (PCT)
Prior art keywords
gear
output
inner ring
ring gear
rolling bearing
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PCT/CN2015/075278
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English (en)
Chinese (zh)
Inventor
徐新生
康小荣
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徐新生
康小荣
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Publication of WO2016127472A1 publication Critical patent/WO2016127472A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/62—Gearings having three or more central gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2306/00—Shifting

Definitions

  • the invention belongs to the technical field of mechanical transmission and electric tools, and relates to a variable speed gear box, in particular to a planetary structure variable speed gear box which can be used for a battery type electric tool.
  • the torque output of the tool planetary gear shifting gearbox is outputted by the last stage of the planetary gear to drive the output shaft, but due to the influence of the gearbox structure, the output shaft is external.
  • the increase in the size of the circle is limited, and the force arm of the output shaft is relatively small, resulting in a relatively small torque output in the low torque position, resulting in failure to operate normally in the low gear position, thereby affecting the operator's work efficiency. Defects.
  • the “Milwaukee” and “DeWalt” brands belong to the United States.
  • the two major companies occupy the high-end market of global battery-powered tools.
  • all of their current battery drill tools are driven by the last stage of planetary gears to drive the output shaft.
  • the output part has a diameter of up to 13 mm, which is also present in the low gear position. Defects that do not work properly, which affects the operator's productivity.
  • FIG. 1 is a schematic structural view of an output portion of a conventional gearbox assembly, the output of the torque is output through the output shaft 112 shown in FIG. 1, and the adjustment of the magnitude of the torque is mainly controlled by the elastic force generated by the compression spring 16.
  • the working principle is that the spring 16 is pressed against the spacer 15, and the other end surface of the spacer 15 is placed on the cylindrical pin 14. The other end of the cylindrical pin is placed on the first steel ball 13, and the other end of the first steel ball 13 is topped.
  • the torsion force generated by the last stage inner ring gear 11 is greater than the spring force of the spring, the inner ring gear slips at this time, and the output shaft has no torque output.
  • the increase of the size of the output shaft is limited, and the force arm of the output shaft is relatively small, which causes the normal operation in the low gear position; the battery-type electric drill product currently produced on the market
  • the output shaft is also only 13 mm at the maximum.
  • the gearbox has the same outer dimensions, the force arm of the output shaft is made larger, and the working efficiency is improved.
  • the conventional output gear from the last stage of the planetary gear is outputted to the output of the last stage.
  • the output can increase the output arm to increase the output torque.
  • a new planetary structure shifting gearbox for a battery-type electric drill tool includes:
  • gearbox end cap that is fixed relative to the gearbox housing
  • a display panel (torque control) fixed to the tool casing; through which the number of gears required for each torque control is displayed; and the wire is coupled to the torque control circuit board;
  • a circuit board that is fixed relative to the tool casing; controls the magnitude of the output torque actually required for each corresponding gear position; and receives the required connection through the wire to the power supply device (ie, the power source)
  • the current is simultaneously connected to the DC motor through the wire, and the current controlled by the circuit board is transmitted to the DC motor, so that the DC motor rotates to drive the two-speed gear box to work.
  • the input part that is, the motor gear, which is fixed on the corresponding motor shaft;
  • shifting portion that is, a multi-stage planetary reduction structure, which is held in the gear case housing;
  • the output part that is, the last stage output inner ring gear
  • the output inner ring gear is held on the gear box housing by at least one rolling bearing and bushing or at least one rolling shaft, oil bearing, steel ball, washer and circlip
  • the threaded coupling drives the drill chuck to rotate; the rolling bearing is tightly fitted to the gear box housing through the outer ring and the inner hole of the gear box; the oil bearing is tightly fitted to the inner hole corresponding to the gear box housing by the outer and outer rings.
  • the output inner ring gear refers to a first-order output inner ring gear having the largest diameter; and further includes: a gear box housing fixed to the tool housing;
  • gearbox end cap that is fixed relative to the gearbox housing
  • a display panel fixed relative to the tool casing; through which the number of gear positions required for each torque control is displayed; and the wire is coupled to the torque control circuit board through a wire;
  • the size of the output torque required to control the respective gear positions is controlled by the wire; the wire is connected to the power supply device to receive the required current, and the wire and the DC motor are simultaneously Connected to transmit the current controlled by the circuit board to the DC motor to rotate the DC motor.
  • the input part, the motor gear, is fixed to the corresponding motor shaft.
  • the shifting portion and the planetary reduction structure are disposed in the gear case housing.
  • the shifting portion adopts a three-stage planetary shifting mechanism, and two different gear ratios are generated through the action of the shifting push button and the shifting bracket.
  • the three-stage planetary mechanism is disposed between the gearbox front casing, the gearbox rear casing and the gearbox end cover, and the first-stage and second-stage planetary shifting mechanisms adopt a two-speed gearbox structure, and the third-stage planetary mechanism:
  • the third stage planetary gear passes through the inner bore and the pin shaft The cooperation is maintained on the third-stage planetary carrier, and the third-stage planetary gear can rotate around the pin on the third-stage planetary carrier; the second-stage planetary carrier is retained by the engagement of the sun gear and the third-stage planetary gear.
  • the third stage planetary carrier is held on the output inner ring gear by the internal gear of the third stage planetary gear and the output inner ring gear.
  • the sun gear on the second stage planetary carrier drives the inner hole of the third stage planetary gear to rotate around the pin on the corresponding third stage planetary carrier, and passes through the third stage planetary gear in the output inner ring gear. Simultaneous movement, driving the output inner ring gear to rotate to output power.
  • the output portion drives the drill chuck by connecting the thread on the inner ring gear and the thread of the drill chuck; the output inner ring gear is maintained by the tight fit of the outer circular portion with the inner bore of the first rolling bearing and the second rolling bearing
  • the rolling bearing is freely rotatable around the inner ring of the two rolling bearings; the inner hole of the first rolling bearing is mounted on one side of the inner ring of the output inner ring gear by a tight fit with the outer circle of the output inner ring gear, first One end of the inner ring of the rolling bearing is on the end face of the output inner ring gear, and the other end is on the end face of one side of the second bushing.
  • One side of the end face of the outer ring of the first rolling bearing is placed at one end of the first bushing, first The other side of the end surface of the outer ring of the rolling bearing is prevented from moving to one side of the inner ring of the output ring gear by the action of one end of the first circlip; the first rolling bearing passes through the inner hole of the second rolling bearing and outputs the outer circle of the inner ring gear a tight fit is mounted on a side of the outer ring of the output inner ring gear; one end of the inner ring of the second rolling bearing is placed on the other end face of one side of the second bushing, and one end of the outer ring of the second rolling bearing is placed on the front gear box Bearing hole The other end is at one end of the first sleeve; the outer ring of the first rolling bearing and the second rolling bearing is fixed to the front gear housing with the tight fit of the inner hole of the front gear housing; the first circlip is stuck in front The inner groove of the gear box prevents the first rolling bearing and the second rolling bearing from moving
  • the shifting portion employs a two-stage planetary shifting mechanism.
  • the motor gear is fixed on the motor shaft, and the inner hole of the first stage planetary gear is rotated around the corresponding pin shaft of the first stage planetary gear carrier, and the rotation of the first stage planetary gear in the first stage inner ring gear is driven.
  • a planet carrier rotates, and the sun gear on the first stage planet carrier drives the inner hole of the second stage planetary gear to rotate around the corresponding pin on the second stage planetary carrier, and the second stage planetary gear is in the output inner ring gear
  • the rotation drives the output inner ring gear to rotate together with the inner ring of the rolling bearing, and drives the output inner ring gear to rotate to output power.
  • the shifting portion has a two-stage planetary mechanism disposed between the gear case and the gear box end cover, the first stage planetary mechanism adopts a single speed gear box structure, and the second stage planetary mechanism: the second stage planetary gear passes through The cooperation of the hole and the pin shaft is maintained on the second stage planetary carrier, and the second stage planetary gear can rotate around the pin on the second stage planetary carrier; the first stage planetary carrier passes the meshing of the sun gear and the second stage planetary gear It is held on the second stage planet carrier; the second stage planet carrier is held on the output ring gear by the internal gear of the second stage planetary gear and the output ring gear.
  • the sun gear on the first stage planetary carrier drives the inner hole of the second stage planetary gear to rotate around the pin on the corresponding second stage planetary carrier, and passes through the second stage planetary gear while outputting the inner ring gear Movement, driving the output ring gear to rotate.
  • the output part drives the drill chuck by connecting the external thread on the inner ring gear and the internal thread of the drill chuck; the output inner ring gear passes through the outer circle to the inner side of the inner tooth and the inner side of the rolling bearing, and the outer ring
  • the side of the round portion with the external thread and the clearance with the inner hole are held on the inner hole of the rolling bearing and the oil bearing, and can rotate freely in the oil bearing with the inner ring of the rolling bearing;
  • the inner hole of the rolling bearing passes through and outputs the outer circle of the inner ring gear
  • the tight fit of the part is mounted on the side of the inner ring of the output inner ring gear, and one end of the inner ring of the rolling bearing is placed on the end face of the output inner ring gear, and one end face of the outer ring of the rolling bearing is placed on the end face of the oil bearing, and the end face of the outer ring of the rolling bearing
  • the other side is prevented from moving to one side of the inner ring gear by the action of one end of the second
  • the traditional torque output is output by the last stage of the planetary gear to drive the output shaft to output from the last stage output inner ring gear, which can increase the output force arm and increase the output torque.
  • the output shaft of the conventional planetary gear shifting gearbox has a maximum diameter of D2 as shown in Fig. 1 and a maximum of 13 mm on the market.
  • the output arm of the new gearbox is generally The maximum diameter can be increased to the outer diameter of the output inner ring gear, as shown by D1 in Fig. 1, the output torque is multiplied by the conventional gearbox, and the output torque of the low gear is relatively increased, thereby eliminating the low gear position.
  • 1 is a schematic cross-sectional view of an output portion of a conventional planetary transmission gearbox assembly. Of which: 11 - final stage inner ring gear, 12-gear box, 13-first steel ball, 14-cylinder pin, 15-slip, 16-spring, 17-oil bearing, 18-first gasket, 19 - second steel ball, 110 - second spacer, 111 - circlip, 112 - output shaft.
  • Fig. 2 is a plan view showing the relationship between the main components of the embodiment 1 of the present invention. Among them: 221-chuck, 225-gear box assembly, 227-DC motor.
  • Figure 3 is a cross-sectional view showing the novel two-speed planetary structure shifting gearbox assembly of the first embodiment of the present invention.
  • Fig. 4 is a schematic view showing the mutual assembly relationship between the components of the output portion of the embodiment shown in Fig. 3. Of which: 215-input Ring gear, 223-first circlip, 216-first rolling bearing, 217-first bushing, 222-second bushing, 218-second rolling bearing, 220-second circlip, 219-front gearbox.
  • Figure 5 is a perspective view of the output ring gear of the embodiment of Figure 3.
  • Figure 6 is a plan view of the third stage shifting. Among them: 213-third-stage planetary gears, 214-third-stage planetary brackets, 215-output inner ring gears, and 212-second-stage planetary gears on the sun gear.
  • Figure 7 is a perspective view of the third stage planetary carrier of the first embodiment.
  • Fig. 8 is a perspective view showing the third stage planetary gear of the first embodiment.
  • FIG. 9 is a perspective view of the second stage planetary carrier of the first embodiment.
  • Figure 10 is a plan view showing the relationship between the main components of Embodiment 2 of the present invention. Among them: 315-clamp, 317-gearbox assembly, 319-DC motor.
  • Figure 11 is a cross-sectional view showing a novel single speed planetary gear shifting gearbox assembly of Embodiment 2 of the present invention.
  • 31-first stage planetary gear 32-first stage planetary carrier, 33-motor shaft, 34-motor gear, 35-gear box end cover, 36-first stage inner ring gear, 37-second stage planet Gear, 38-second stage planetary carrier, 39-output inner ring gear, 310-rolling bearing, 311-oil bearing, 312-steel ball, 313-shield, 314-first circlip A, 315-chuck, 316 - Gearbox housing, 317 - second circlip.
  • Figure 12 is a schematic view showing the mutual assembly relationship between the components of the output portion in the embodiment shown in Figure 11; Among them: 316-gear case, 39-output inner ring gear, 310-rolling bearing, 311-oil bearing, 312-steel ball, 313-shield, 314-first circlip, 317-second circlip.
  • Figure 13 is a perspective view showing the output inner ring gear of the embodiment shown in Figure 11;
  • Figure 14 is a perspective view of the oil bearing in the embodiment shown in Figure 11.
  • Figure 15 is a plan view of the second stage shifting. Among them: 39-output inner ring gear, 37-second stage planetary gear, 32-first stage planetary gear on the sun gear, 38-second stage planetary support.
  • Figure 16 is a perspective view of the second stage planetary carrier of the second embodiment.
  • Figure 17 is a perspective view showing the second stage planetary gear of the second embodiment.
  • Figure 18 is a perspective view of the first stage planetary carrier of the second embodiment.
  • FIGS. 2 to 9 show a first embodiment of the present invention, which is a two-speed planetary structure shifting gearbox.
  • FIG. 3 clearly shows the mutual assembly relationship of the various internal components.
  • a new type of two-speed planetary gear shifting gearbox for a battery-type electric drill tool includes:
  • Rear gear housing 27 and front gear housing 219 which are fixed relative to the tool housing; front gear housing 219 and rear teeth
  • the wheel housing shell 27 is fixedly coupled by a screw 224;
  • a DC motor 227 as shown in Figure 2, is fixed relative to the tool housing and the gearbox end cap;
  • Gearbox end cap 22 as shown in FIG. 3, is fixedly coupled to front gear housing 27 by two pins 226;
  • the display panel can be selected from existing products (not shown in the figure), which is fixed with respect to the tool casing; the use of electronic technology to display the number of gears required for each torque control; Connected to the torque control circuit board;
  • the circuit board can be selected from existing products (not shown in the figure), which is fixed with respect to the tool casing; by which the size of the output torque required for each corresponding gear position is actually controlled;
  • the wire is connected to the power supply device (ie, the power source) to receive the required current, and at the same time, the wire is connected to the DC motor to transmit the current controlled by the circuit board to the DC motor, so that the DC motor rotates to drive the two-speed gear box to work. ;
  • the shifting portion is a conventional three-stage planetary shifting mechanism.
  • the first-stage and second-stage planetary shifting mechanisms adopt a conventional two-speed gearbox structure, and the third-stage planetary mechanism is different from the conventional gearbox; the mutual assembly relationship of the components of the third-stage shifting mechanism is as shown in FIG.
  • the third stage planetary gear 213 is held on the third stage planetary carrier 214 by the cooperation of the inner hole A3 (shown in FIG. 8) and the pin A2 (shown in FIG.
  • the third stage planetary gear 213 can be wound around the third stage.
  • the pin on the stage planet carrier 214 rotates; the second stage planet carrier 212 is engaged by the sun gear A4 (shown in Figure 9) and the five third stage planet gears, which are held on the third stage planet carrier 213;
  • the third stage planetary carrier 213 is held on the output ring gear by the internal gear engagement of the five third stage planetary gears 213 and the output inner ring gear 215.
  • the sun gear A4 on the second stage planetary carrier 212 shown in Fig. 9 drives the inner holes A3 of the five third stage planetary gears 213 (shown in Fig. 8) while winding around.
  • the A2 pin on the corresponding third stage planetary carrier 214 (shown in FIG. 7) is rotated, and the third stage five planetary gears 213 are simultaneously moved in the output inner ring gear 215 (shown in FIG. 5).
  • the output inner ring gear 215 is driven to rotate.
  • the output portion that is, the external thread of the output inner ring gear 215, as shown in E1 of FIG. 5, drives the drill string by connecting the external thread on the inner ring gear 215 to the internal thread of the drill chuck.
  • Head work ; the mutual assembly relationship of the components of the output portion is as shown in FIG. 4, and the output inner ring gear 215 passes through the outer circular portion A (shown in FIG. 5) and the inner diameter of the first rolling bearing 216 and the second rolling bearing 218.
  • the engagement is maintained on the first rolling bearing 216 and the second rolling bearing 218 to be freely rotatable around the inner ring of the two rolling bearings; the inner hole of the first rolling bearing 216 passes through the tight fit of the outer circle A1 (shown in FIG.
  • One side of the inner ring gear 215 moves; the first rolling bearing 216 is moved to the second rolling axis
  • the inner bore of the bearing 218 is mounted on the output inner ring gear 215 by a tight fit with the outer circle A1 (shown in FIG. 5) of the output inner ring gear 215.
  • One end of the upper external thread, one end of the inner ring of the second rolling bearing 218 is on the other end surface of one side of the second sleeve 222, and one end of the outer ring of the second rolling bearing 218 is placed on the end surface of the bearing hole of the front gear box.
  • the other end is at one end of the first sleeve 217; the tight fit of the outer ring of the first rolling bearing 216 and the second rolling bearing 218 and the inner hole of the front gear housing is fixed on the front gear housing; the first retaining spring 223 is stuck
  • the inner groove of the front gear box 219 prevents the first rolling bearing 216 and the second rolling bearing 218 from moving to one side of the inner ring of the output inner ring gear 215; the second spring 220 is caught in the spring groove D1 of the output inner ring gear 215 (shown in Fig. 5), the output ring gear 215 is prevented from moving in the direction of the motor.
  • FIG 11 clearly shows the mutual assembly of the various internal components of the single speed gearbox.
  • the motor gear 34 is fixed on the motor shaft, and the motor gear 34 drives the inner holes of the three first-stage planetary gears 31 to rotate around the corresponding pin shafts of the first-stage planetary gear carrier 32.
  • the three first-stage planetary gears 31 are The rotation of the first stage inner ring gear 36 drives the first planet carrier 32 to rotate.
  • the sun gear on the first stage planet carrier 32 drives the inner holes of the three second stage planet gears 37 around the second stage planet carrier 38.
  • the corresponding pin rotates, and the rotation of the three second-stage planetary gears 37 in the output inner ring gear 39 drives the output inner ring gear to rotate together with the inner ring of the rolling bearing 310, and the thread on the inner ring gear 39 and the drill string are output.
  • the connection of the internal thread of the head drives the drill chuck to work.
  • the second embodiment is a single speed planetary gear shifting gearbox.
  • a single speed planetary gear shifting gearbox that can be used in battery drill tools, including:
  • gearbox end cap 35 as shown in Figure 11, which is fixedly coupled to the gearbox housing by screws;
  • the display panel can be selected from existing products, which are fixed with respect to the tool casing; through which the number of gears required for each torque control is displayed; and the wires are connected to the torque control circuit board through the wires;
  • the circuit board can be selected from existing products, which are fixed relative to the tool casing; the size of the output torque required for controlling the respective gear positions is controlled by the wire; and the power supply device (ie, the power source) is connected through the wire
  • the connection receives the required current, and at the same time connects the DC motor through the wire, and transmits the current controlled by the circuit board to the DC motor, so that the DC motor rotates and drives the gear box to work.
  • the shifting portion is a secondary planetary mechanism; its secondary planetary mechanism is held between the gearbox housing and the gearbox end cap.
  • Its first-stage planetary mechanism adopts the traditional single-speed gearbox structure, and its second-stage planetary mechanism is different from the traditional gearbox; the mutual assembly relationship of the components of the second-stage shifting mechanism is shown in Figure 15, the second stage
  • the planet gears 37 are retained on the second stage planet carrier 38 by the cooperation of the inner bore A8 (shown in Figure 17) and the pin A7 (shown in Figure 16), and the second stage planetary gears 37 are rotatable about the second stage planet carrier 38.
  • the upper pin rotates; the first stage planet carrier 32 is engaged by the sun gear A9 (shown in Figure 18) and the three second stage planet gears, which are held on the second stage planet carrier 38; the second stage planet Bracket The inner teeth of the 38-way three second-stage planetary gears 37 and the output inner ring gear 39 are meshed on the output inner ring gear.
  • the sun gear A9 on the first stage planetary carrier 39 shown in Fig. 18 drives the inner holes A8 (shown in Fig. 17) of the three second stage planetary gears 37 to simultaneously rotate.
  • the A7 pin (shown in FIG. 16) on the second stage planetary carrier 38 is rotated, and the output of the inner ring gear 39 is rotated by the simultaneous movement of the second stage three planetary gears 37 in the output inner ring gear 39. .
  • the output portion that is, the external thread of the output inner ring gear 39, as shown in E2 of FIG. 13, is driven by the connection of the thread on the inner ring gear 39 and the internal thread of the drill chuck. .
  • the mutual assembly relationship of the components of the output portion is as shown in FIG. 12, and the output inner ring gear 39 passes through the outer circle portion A5 (shown in FIG. 13) by the inner tooth side and the inner diameter of the rolling bearing 310, and the outer circle.
  • the side of the external thread of the portion A5 and the clearance with the inner hole C1 (shown in FIG. 14) are held on the inner ring C1 (shown in FIG.
  • the bearing 311 is freely rotatable; the inner hole of the rolling bearing 310 is mounted on the side of the inner ring of the output inner ring gear 39 through the tight fit of the outer circular portion A5 (shown in FIG. 13) of the output inner ring gear 39, and the inner ring of the rolling bearing 310
  • One end is placed on the end face F2 (shown in FIG. 13) of the output inner ring gear 39, and one end face of the outer ring of the rolling bearing 310 is placed on the end face B2 (shown in FIG.
  • the steel ball 312 shown in Fig. 12 is held between the oil-impregnated bearing 311 and the spacer 313; the first retaining spring 314 is caught in the retaining groove D2 (shown in Fig. 13) of the output inner ring gear 39, and is prevented from being outputted.
  • the ring gear 39 moves axially in the direction of the motor while preventing the axial movement of the spacer 313 in the direction of the external thread of the output ring gear.

Abstract

Boîte d'engrenages à changement de vitesse applicable à un outil électrique du type à batterie, comprenant : une partie d'entrée, une partie de changement de vitesse, une partie de sortie et un arbre de sortie, la partie de sortie comprenant une bague d'engrenage intérieure de sortie (215), l'arbre de sortie est relié à la bague d'engrenage intérieure de sortie (215) de la partie de sortie et est entraînée par celle-ci pour sortir de la puissance, et la bague d'engrenage intérieure de sortie (215) se réfère à un niveau de bague d'engrenage intérieure de sortie ayant un diamètre maximum; la partie de changement de vitesse peut adopter un mécanisme de changement de vitesse planétaire à trois niveaux et peut produire deux différents rapports de transmission différents à l'aide de fonctions d'un bouton-poussoir de changement de vitesse et d'un support de changement de vitesse; ou la partie de changement de vitesse peut adopter un mécanisme de changement de vitesse planétaire à deux niveaux. La sortie de torsion est changée, passant de la manière de sortie classique par l'entraînement de l'arbre de sortie par l'intermédiaire d'un engrenage planétaire de dernier niveau à la manière de sortie par l'intermédiaire d'une bague d'engrenage intérieure de sortie de dernier niveau, de telle sorte que le bras de moment de sortie peut être augmenté, la torsion de sortie est multipliée par rapport à la boîte d'engrenages classique, et la torsion de sortie à un niveau d'engrenage bas est augmentée en correspondance.
PCT/CN2015/075278 2015-02-11 2015-03-27 Boîte d'engrenages à changement de vitesse applicable à un outil électrique de type à batterie WO2016127472A1 (fr)

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CN201510072269.5 2015-02-11
CN201510072269.5A CN104728402B (zh) 2015-02-11 2015-02-11 一种可用于电池式电动工具的变速齿轮箱

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