EP3313623A1 - Outil électroportatif à réducteur épicycloïdal - Google Patents
Outil électroportatif à réducteur épicycloïdalInfo
- Publication number
- EP3313623A1 EP3313623A1 EP16750885.2A EP16750885A EP3313623A1 EP 3313623 A1 EP3313623 A1 EP 3313623A1 EP 16750885 A EP16750885 A EP 16750885A EP 3313623 A1 EP3313623 A1 EP 3313623A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- output shaft
- bearing
- ball screw
- power tool
- tool according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/02—Secateurs; Flower or fruit shears
- A01G3/033—Secateurs; Flower or fruit shears having motor-driven blades
- A01G3/037—Secateurs; Flower or fruit shears having motor-driven blades the driving means being an electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D17/00—Shearing machines or shearing devices cutting by blades pivoted on a single axis
- B23D17/02—Shearing machines or shearing devices cutting by blades pivoted on a single axis characterised by drives or gearings therefor
- B23D17/04—Shearing machines or shearing devices cutting by blades pivoted on a single axis characterised by drives or gearings therefor actuated by a rotary shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D29/00—Hand-held metal-shearing or metal-cutting devices
- B23D29/005—Hand-held metal-shearing or metal-cutting devices for cutting sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B1/00—Vices
- B25B1/06—Arrangements for positively actuating jaws
- B25B1/10—Arrangements for positively actuating jaws using screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2087—Arrangements for driving the actuator using planetary gears
Definitions
- the present invention relates to a power tool and, more specifically, to such a tool using a transmission for transforming the rotary movement of an electric motor into a longitudinal translation movement of an active member, such as, for example, a transmission comprising a mechanism of the screw-nut type.
- the invention finds applications generally in the production of transmission mechanisms and in the manufacture of power tools using a mechanism transforming the rotary motion of an engine into a longitudinal translational movement such as, for example, that provided by a ball screw-nut mechanism.
- the invention finds particular applications in the manufacture of shears or sheet shears.
- Power tools such as pruning shears and sheet metal shears, generally have a handle housing.
- the housing serves as a support for a cutting member and houses an electric motor for actuating the cutting member.
- the cutting member typically comprises a jaw with a fixed blade called hook, and a cutting blade movable around a blade pivot allowing it to pivot relative to the hook. Closing the cutting blade on the hook allows cutting a branch or a branch caught between the blade and the hook.
- a mechanical transmission is used to transmit the movement of the motor to the cutting blade.
- the transmission usually comprises a mechanical gear driven in rotation by the engine. It is, for example, an epicyclic reduction gear with planet gears.
- the gearbox drives a ball screw of a screw-nut mechanism ball. It makes it possible to drive the ball screw with a reduced speed of rotation with respect to the speed of rotation of the electric motor. It also increases the torque.
- the main function of the ball screw-nut mechanism is to convert the rotational movement of the motor and the gear unit into a translation movement.
- the ball nut and the ball screw have complementary helical grooves that face each other and form a ball circulation path.
- the rotation of the ball screw causes the balls to circulate in the ball path and the nut to move along the axis of the screw.
- the mechanical forces of the movement are transmitted from the screw to the nut through the balls.
- the direction of rotation of the screw clockwise or anticlockwise, determines the direction of axial displacement of the nut.
- the nut is thus animated with a translation movement.
- the translational movement of the ball nut is then transmitted to a cam of the cutting member.
- the cam makes it possible to pivot a cutting blade by means of a lever effect between the cam pivot and the blade pivot.
- the direction of movement of the ball nut along the ball screw determines the direction of pivoting of the blade is to open the cutting member, or to close it.
- the opening of the cutting member corresponds to a pivoting of the movable blade which away from the hook. Closing the cutter moves the blade on the hook.
- Such a tool is described, for example, in the document FR2614568.
- Another solution to better contain the radial stresses, is to connect the ball screw to the housing of the cutting tool by means of two bearings mounted respectively at both ends of the ball screw.
- This solution ensures a good stability of the ball screw but can cause problems of alignment of the bearings. It also poses problems of size and limitation of the stroke of the ball nut at the end of the ball screw. Finally, it requires a more complex design at the cutting blade, including its cam, generating a higher weight.
- the size and weight of the various organs are indeed important parameters in the production of portable tools.
- the present invention aims to provide a power tool not suffering from the difficulties mentioned above.
- An object of the invention is in particular to reduce the size and size of the reducer and the bearings used for holding the ball screw in the housing of the tool.
- Another object of the invention is to provide a mounting of the ball screw to sufficiently contain the radial stresses to make a bearing unnecessary at the distal end of the ball screw, that is to say the end opposite to the reducer.
- An object of the invention is still to provide a compact tool, lightened, with a ball screw-nut mechanism allowing a maximum stroke of the ball nut.
- an object of the invention is to provide a power tool operating with a reduced transmission noise.
- the invention more specifically proposes a power tool comprising, in a housing:
- the tool comprises at least one stabilization bearing, axially offset relative to the support bearing.
- the stabilizing bearing connects the output shaft of the gearbox to the casing by at least one intermediate piece chosen from: the motor drive shaft, the drive shafts satellites of the gearbox and planet gears of the gearbox forming rollers.
- the planet gears form rollers, when in addition to their function of transmitting motion, they are also configured for the transmission of radial stresses by a rolling contact with a conjugate rolling surface.
- the planet gears of the gearbox are not used as an intermediate part, and therefore do not intervene in the transmission of radial stresses, the planet gears may be ordinary pinions which do not constitute rollers.
- bearing does not prejudge the type of bearing used.
- the one or more support bearings, the stabilizing bearing or bearings, as well as other bearings, for example bearing bearings of the drive shaft, can be chosen from bearings with or without a bearing, ball bearings with needles or rollers, or combinations thereof according to the specific constraints of the tool considered.
- the gearbox, the ball screw and the nut of the ball screw-nut mechanism are part of a transmission which transmits the movement of the motor to an active member of the tool such as a cutting member. This aspect is described in more detail in the following description.
- the output shaft is rigidly secured to the ball screw when it is fixed to the ball screw so as to prohibit relative angular movement between these parts.
- the output shaft of the gearbox is rigidly secured to the ball screw when it is formed in one piece with the ball screw or when it constitutes the ball screw.
- the output shaft of the gearbox may constitute the ball screw.
- the helical groove for the circulation of the balls is formed directly on the output shaft of the gearbox.
- the support bearing connects the output shaft of the gearbox to the housing when it ensures the maintenance of the axial position of the output shaft relative to the housing, with a freedom of rotation of the output shaft .
- the support bearing can be mounted directly on the output shaft, for example in the immediate vicinity of the gearbox. It can also be mounted on a bearing seat provided, not directly on the output shaft, but on the ball screw secured to the output shaft. Furthermore the support bearing can be received directly in the housing, or in an intermediate piece, such as a bearing housing, or an intermediate casing, which connects the support bearing to the housing.
- the stabilization bearing is axially offset relative to the support bearing when there exists between these bearings an offset measured along the common axis of the output shaft of the reducer and the ball screw or along a parallel axis to the axis of the output shaft of the gearbox.
- the support bearing and the stabilization bearing or bearings may be coaxial or not.
- the stabilizing bearing connects the output shaft of the gearbox to the housing through one or more of the intermediate parts mentioned above. These include the drive shaft of the motor, the planet carrier axes of the gear unit and / or the planet gears of the gear unit. This does not prejudge the existence or not of other additional intermediate parts which contribute to the maintenance of the output shaft of the gearbox on its axis.
- the stabilizing bearing is connected to the housing through the drive shaft of the electric motor, it is understood that the drive shaft of the electric motor is not in direct contact with the housing of the tool. Indeed, the motor shaft can be received itself in the housing through one or more bearings.
- the output shaft of the epicyclic reduction gear can include an axial bore facing the electric motor.
- the motor drive shaft electric can have an end received in the axial bore of the output shaft through the stabilizing bearing.
- the stabilizing bearing is then housed in the axial bore.
- the output shaft of the gearbox, its axial bore, the stabilizing bearing and the motor drive shaft can be coaxial.
- the stabilizing bearing offset from the support bearing of the output shaft of the gearbox, relieves the support bearing of part of the radial stresses to which the ball screw is subjected, by transmitting them to the shaft of the gearbox. drive of the electric motor. These stresses are then transmitted to the housing of the tool via one or more bearings of the drive shaft of the electric motor, already mentioned.
- the support bearing of the output shaft of the gearbox is preferably in the vicinity of the gearbox so as not to encumber the space dedicated to the ball screw. This bearing, relieved of some of the radial stresses experienced by the ball screw, can thus be dimensioned in a more reduced manner, and the end of the ball screw, opposite the reducer, may be free of bearing.
- the end of the ball screw can be free, which increases the length of the ball screw available for the stroke of the ball nut, while keeping the tool compact.
- the concentricity of the stabilizing bearing within the axial bore of the output shaft of the gearbox is also a characteristic contributing to the compactness of the transmission.
- the stabilizing bearing is mounted on a portion of the drive shaft of the electric motor located between the electric motor and the central gear of the reducer.
- the stabilizing bearing can be connected to the output shaft of the gearbox via the planet carrier pins.
- the planet carrier axes can form an anchorage on the output shaft for a stabilization bearing receiving part.
- the stabilizing pafier thus transmits a portion of the radial forces undergone by the ball screw, and therefore by the output shaft of the gearbox, to the motor shaft. The forces are then transmitted to the housing by support bearings of the motor shaft.
- the axial offset between the support bearing and the stabilizing bearing may be greater than in an embodiment where the stabilizing bearing is housed in a bore of the end of the output shaft of the reducer.
- the planet carrier axes may each be provided respectively with a stabilizing bearing of the output shaft.
- the stabilizing bearings are in rolling contact with a crown of the housing.
- the planet carrier pins are rigidly secured to the output shaft in so far as they drive the output shaft into the epicyclic reduction gearbox. In this mode of implementation, they are used to transfer the radial stresses of the ball screw and the output shaft of the gearbox to the housing, via the rolling ring.
- the crown can be formed directly by the housing or can be an insert mounted in the housing and fixed relative to the housing.
- the number of satellite gate axes is generally greater than or equal to three. It is thus possible to use several stabilization levels and thus distribute the transmission of stabilization stresses towards the housing.
- the bearings may be smaller than in a configuration with a single stabilization bearing.
- the planet gears may each have a cylindrical elbow with a diameter substantially equal to the pitch diameter of the pinion.
- the shoulder of the planet gears form a tread in rolling contact with a bearing ring secured to the housing.
- the satellites in addition to their function of transmission of motion in the epicyclic reduction gear, also serve as rollers.
- each planet gear constitutes, with its planet-bearing axis, a stabilization bearing.
- This embodiment is particularly economical insofar as the planet gears constitute directly the bearings with their respective axes. It requires, however, precise sizing of the shoulder of the gables. Indeed, if the shoulder had a diameter different from the pitch diameter of the gears, slip friction would be caused between the shoulder and the bearing ring.
- the motor drive shaft is connected to the housing by at least one bearing called “engine bearing", separate from the stabilization bearing.
- engine bearing separate from the stabilization bearing.
- the motor shaft is preferably supported by two motor bearings, for example at each end of the rotor.
- the various bearings mentioned, in particular the support bearing, the stabilizing bearing or bearings and the motor bearing or bearings may be rolling bearings or not. It may be, in particular, bearings with a ball bearing, needle or roller, or a combination thereof.
- the support bearing of the gearbox output shaft preferably comprises a needle or roller bushing. Supporting the output shaft of the gearbox with a needle or roller bushing makes it possible to withstand a portion of the radial stresses experienced by the ball screw and the output shaft of the gearbox. This construction partially relieves the stabilizing bearing.
- the tool may also include one or more needle stops, cooperating with the output shaft of the epicyclic reduction gear, to prohibit or limit axial movement of the output shaft and support the axial forces of the transmission.
- the needle stop can be configured, for example, to come into contact with a bearing flange, an elastic ring or a shoulder adapted to the output shaft.
- the axial stresses are essentially due to the opening and closing constraints of the cutting member in the case of a tool such as shears or shears.
- the ball screw-nut mechanism may comprise a ball nut, movable in translation relative to an axis of the ball screw, and connected to an active member such as a cutting member.
- the ball nut can be connected to a pivoting blade, and more specifically to an actuating cam of the blade.
- the cam is provided to convert the translational movement of the ball nut into a pivoting movement of the blade.
- the ball nut can be connected to the cam by one or more rods, for example. The displacement of the ball nut along the ball screw thus causes the opening or closing of the cutting member.
- Figure 1 is a section of an electric pruning device according to the invention.
- Figure 2 is a sectional view of a portion of a motor and a reducer secateur of Figure 1 showing on a larger scale the arrangement of support bearings and stabilization.
- FIG. 3 is a schematic representation of a possibility of arranging the support and stabilization bearings according to the invention and corresponding to FIG. 1.
- FIG. 4A is a schematic representation of another possibility of arranging the support and stabilization bearings, according to the invention.
- Figure 4B is a section along A-A of the device of Figure 4A.
- FIG. 5A is a schematic representation of another possibility of arranging the support and stabilization bearings according to the invention.
- Figure 5B is a section along B-B of the device of Figure 5A.
- Figure 6 is a schematic representation of another possibility of arranging the support and stabilizing bearings according to the invention. Detailed description of modes of implementation of the invention
- FIG. 1 represents in section an electric pruner 1.
- the electric pruner 1 comprises a main housing 2 housing an electric motor 10, an epicyclic reduction gear 20, mounted on a drive shaft 12 of the motor, and a nut screw mechanism 30. ball.
- the shaft 12 of the electric motor 10 is held in the housing by two motor bearings PM1 and PM2 located on either side of the motor 10.
- the bearings P 1, PM 2 are preferably made of ball bearings.
- the motor 10 comprises a stator 13 and a rotor
- the epicyclic reduction gear 20 which can be seen more clearly in FIG. 2, comprises an output ring gear rigidly integral with an output shaft 32.
- the output ring serves as support for the planet carrier pins 24 which carry planet gears 25.
- the invention relates to gears meshing with a central pinion 26 secured to the drive shaft 12 of the motor 10, and rolling in a toothed rolling crown 27.
- the planet gears 25 are simply referred to as "satellites" in the rest of the text. .
- the epicyclic reduction gear has the function of conferring on its output shaft 32 a reduced speed of rotation relative to the speed of rotation of the drive shaft 12 of the motor.
- the rotation at reduced speed is accompanied by an increase in the torque.
- the output shaft 32 of the gearbox is also part of the ball nut screw mechanism 30 in that a part of this shaft, visible in FIG. 1, forms the ball screw 34.
- the free end of the output shaft is provided with a helical groove for the circulation of balls.
- the ball screw 34 of the output shaft cooperates with a nut 36 through unrepresented balls, which circulate in a ball path formed by the conjunction of the helical groove of the ball screw and a corresponding helical groove of the ball nut 36.
- the nut 36 is not shown in section.
- the rotation of the output shaft 32 thus causes a displacement of the ball nut 36.
- the nut moves in a direction that brings it closer to or away from the engine according to the direction of rotation of the shaft. exit.
- the ball nut 36 of the ball screw-nut mechanism 30 is connected to a cutting member 40.
- this is a movable blade 42 of the pruner pivoting about A blade pivot 43.
- the nut 36 is connected to a cam 44 of the movable blade via a cam pin 45 and two rods 46 of which only one is visible.
- the displacement of the nut 36 causes the pivoting of the movable blade 42 in a direction that brings it closer to or away from a contralame 48 called "hook".
- the movable blade pivots away from the hook when the ball nut 36 moves towards the distal end of the ball screw 34. This movement corresponds to the opening of the pruner .
- the movable blade 42 pivots to close on the hook when the ball nut moves toward the motor 10. This movement is a cutting movement.
- the opening and cutting movements of the cutting member generate mainly on the ball screw 34 and on the output shaft 32 of the gearbox 30 axial forces, that is to say parallel to the axis of rotation. the output shaft 32. they also generate radial forces, that is to say perpendicular to the axis of the output shaft 32.
- the radial forces are due, for example, to a transient inclination of the rods by relative to the axis of the output shaft 32 or the ball screw 34. This is the case, in particular, when the rods are connected to a pivoting cam 44 by a cam pivot 45 which can not be maintained constantly in the axis of the ball screw in view of its circular trajectory centered on the blade pivot 43.
- the output shaft 32 of the epicyclic reduction gear 20 is held in the main housing 2 by a support bearing PS1.
- the support bearing PS1 visible on a larger scale in FIG. 2, has the function of maintaining the output shaft and of transferring towards the casing axial and radial forces applied to the output shaft 32 by the work of the cutting member. The forces are transmitted to the main casing 2 by means of a ring 52 of the support bearing PS1.
- the parts of the motor or the gearbox held in the main housing 2 of the shears are by means of the intermediate casing 4 already mentioned.
- a maintenance directly in the main housing is however possible.
- the support bearing PS1 comprises a first needle bushing forming a first needle bearing 54 rolling on the surface of the output shaft 32 of the reducers.
- the needles of the needle bearing 54 make it possible to transmit to the casing a part of the radial forces sustained by the output shaft 32 via the ring 52.
- the support bearing PS1 comprises a second needle cage which forms a stop to Needles 56.
- the needle stop 56 rolls against the output ring gear 22 of the gearbox, and more precisely against a flange 57 resting on the crown.
- the needle stop 56 is used to transfer to the housing, via the ring 52, the axial forces of the output shaft 32 of the bearing during the cutting movement.
- the support bearing PS1 comprises a third needle cage forming another needle stop 58 bearing against a second flange 59 held on the output shaft 32 by an elastic ring 60.
- the needle stop 58 makes it possible in particular to transfer towards the housing axial forces experienced by the output shaft 32 of the gear during an opening movement of the cutting member.
- the end of the drive shaft 12 of the motor facing the epicyclic reduction gear is provided with a stabilizing bearing PS2.
- the stabilizing bearing is mounted in an axial bore 33 of the output shaft 32 of the epicyclic reduction gear. It is, in the illustrated example, a ball bearing.
- the drive shaft 12 of the motor, the bore 33, the stabilizing bearing PS2 and the output shaft 32 of the epicyclic reduction gear are coaxial.
- the stabilization bearing PS2 is axially offset relative to the support bearing PS1 towards the motor.
- the offset gives these two bearings a good range to withstand the forces and radial stresses experienced by the ball screw 34 and thus the output shaft 32 of the epicyclic reduction gear.
- the use of the PS2 stabilization bearing greatly relieves the PS1 support bearing from radial stresses and therefore allows a better support of the ball screw and a smaller dimensioning of the PS1 support bearing. It also makes it possible to prevent the radial forces being borne directly by the gearbox satellites, avoiding premature wear of the gear teeth of the various gears of the gearbox (satellites, crown).
- the ball screw 34 has no bearing at its free end, as shown in FIG. 1.
- the absence of a bearing at the end of the ball screw allows, as previously mentioned, a greater deflection of the ball nut stroke and a more compact construction of the tool.
- FIG. 3 is a diagrammatic section showing the arrangement of the main members involved in the stabilization of the output shaft in a construction comparable to FIGS. 1 and 2.
- the motor 10 the motor bearings PM1, PM2 supporting the drive shaft 12 of the motor, the central drive gear 26, mounted on the drive shaft 12 of the motor 10, the stabilization bearing PS2 integrated in an axial bore 33 of the output shaft 32, the planet carrier support ring 22, the support bearing PS1 and the output shaft 32 of the epicyclic reduction gearbox 30.
- the housing receiving the stresses and mechanical forces of the motor and the gearbox is represented by symbolic way. It may be either the main housing 2 or the intermediate housing 4 received rigidly in the main housing. A double reference 2, 4 is thus mentioned in the figures.
- a satellite 25 is mounted on a planet-carrier shaft 24 of the ring gear 22. H is rotated by the central pinion 26 of the drive shaft 12 of the engine 10.
- the planet gear 25 is meshing with a toothed crown wheel 27 device, in which he can roll.
- the toothed ring gear 27 is held fixed by the main casing 2 or by the intermediate casing 4.
- the rolling of the satellite 25 in the toothed ring gear 27 causes the satellite in a circular motion about the axis 3 of the shaft drive.
- the movement of the satellite 25 drives the output ring 22 which serves as support for the planet carrier axes, and the output ring gear 22 drives the output shaft 32 of the gearbox of which it is integral.
- Figure 3 shows only one satellite 25 located in the plane of section. Two other satellites are located outside the plane of section and are not represented.
- the gearbox 30 preferably comprises a number of satellites equal to or greater than three.
- the second PM2 motor bearing can be omitted.
- the motor shaft is supported only by the first motor bearing PM1, located opposite the epicyclic reduction gear 30, and by the stabilization bearing PS2.
- the stabilization bearing PS2 is in fact maintained on the axis 3 by the output ring gear 22 integral with the output shaft 32, and by the support bearing PS1 connected to the main casing 2 or to the intermediate casing 4.
- FIG. 4A is a schematic cross-section corresponding to another embodiment of the invention in which a stabilization bearing PS2 connects the output shaft of the gearbox to the housing via the planet carrier pins 24.
- the axes satellites are integral with the output shaft 32 via the output ring 22.
- the shafts are also received in a stabilizing disc 70 mounted on the drive shaft 12 of the motor 10 via the stabilizing bar PS2.
- the stabilizing disc 70 is rigidly secured to the planet carrier pins 24 and forms a housing for the stabilizing bearing PS2.
- the drive shaft 12 of the motor is itself connected to the housing via motor bearings PM1 and PM2 already mentioned with reference to the previous figures.
- Figure 4B is a view along a plane A-A of Figure 4A. It shows in section the stabilizing disc 70 and the planet carrier axes 24 of three satellites 25 of which only the primitive circles are indicated in broken lines.
- the satellites 25 have a regular angular distribution at 120 ° around the axis 3 of the drive shaft 12.
- the stabilization bearing PS2 is indicated schematically. It connects the driving shaft 12 to the stabilizing disk 70.
- FIGS. 5A and 5B show a variant of the implementation of the invention, in which several stabilizing steps are used.
- the stabilization bearings PS2a, PS2b, PS2c are always integral with the output shaft 32 of the epicyclic reduction gearbox 30 via the output ring gear 22 and the planet carrier pins 24 rigidly integral with the output ring gear 22.
- stabilization bearings PS2a, PS2b, PS2c are mounted on the planet carrier axles, behind the satellites, and roll on a smooth rolling crown 29.
- the term “smooth” does not prejudge the surface condition of the so-called rolling crown it is smooth, but simply distinguishes it from the toothed ring gear 27.
- the smooth ring gear 29 is indeed devoid of teeth and has a peripheral and cylindrical tread for the bearings.
- the smooth rolling ring 29 may be formed by a shoulder of the toothed ring gear 27. It will be recalled that the planet wheels 25 are engaged on the toothed ring gear 27.
- the bearings PS2a, PS2b, PS2c are, for example, ball or needle bearings. Bearings without bearings are also usable.
- Figure 5B shows the bearings PS2a, PS2b, PS2c according to section BB of Figure 5A. The pitch circles of the satellites 25 and the center gear 26 are shown in broken lines.
- Figure 6 shows yet another implementation possibility in which the satellites 25 directly form the stabilizing bearings.
- the satellites 25, only one of which is seen in section in FIG. 6, have a toothing 25a extending over only a part of their width.
- the toothing of the satellite is engaged with a portion 26a of the central gear 26 also toothed, and with a toothed crown gear 27.
- This mechanism is similar to that described with reference to the previous figures.
- the satellites also form, over a portion of their width, a roller with a shoulder forming a tread 25b.
- the tread 25b of the satellites is rolling on a ring of smooth rolling 29 and a corresponding tread 26b of the central gear 26.
- the smooth rolling ring 29 is comparable to that described with reference to Figures 5A and 5B.
- the smooth rolling ring 29, the tread 26b of the central gear 26, as the tread 25b of the satellite are devoid of toothing.
- the planet gears 25 also constitute stabilization bearings.
- the diameter of the tread 25b of the satellites and the diameter of the tread 26b of the central gear 26 correspond to the pitch diameter of the parts 25a, 26a having teeth to avoid friction during rolling. It is the same for the smooth rolling ring 29 whose diameter is adjusted to the pitch circle of the toothed crown 27.
- the tread 25b of the satellites can be designed to roll only on the smooth rolling ring 29 or only on the tread 26b of the central gear 26.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1555818A FR3037839B1 (fr) | 2015-06-24 | 2015-06-24 | Outil electroportatif a reducteur epicycloidal |
PCT/FR2016/051441 WO2016207516A1 (fr) | 2015-06-24 | 2016-06-15 | Outil électroportatif à réducteur épicycloïdal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3313623A1 true EP3313623A1 (fr) | 2018-05-02 |
Family
ID=54608637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16750885.2A Withdrawn EP3313623A1 (fr) | 2015-06-24 | 2016-06-15 | Outil électroportatif à réducteur épicycloïdal |
Country Status (8)
Country | Link |
---|---|
US (1) | US20180193994A1 (fr) |
EP (1) | EP3313623A1 (fr) |
JP (1) | JP2018521868A (fr) |
KR (1) | KR20180020987A (fr) |
CN (1) | CN107810076B (fr) |
BR (1) | BR112017024999A2 (fr) |
FR (1) | FR3037839B1 (fr) |
WO (1) | WO2016207516A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108501046A (zh) * | 2018-05-18 | 2018-09-07 | 苏州速菲特农林工具有限公司 | 一种大剪力电动剪刀 |
FI128867B (en) * | 2019-08-29 | 2021-02-15 | Tmi Linden Instr | ELECTRIC ARM CUTTER |
WO2021108651A1 (fr) * | 2019-11-27 | 2021-06-03 | Hubbell Incorporated | Ensemble d'entraînement d'outil à arbre d'entraînement principal intégré |
CN114568145A (zh) * | 2020-12-01 | 2022-06-03 | 乌鲁木齐优尼克生物科技有限公司 | 一种软轴驱动修剪机 |
JP2023007796A (ja) * | 2021-07-02 | 2023-01-19 | 株式会社アドヴィックス | 直動アクチュエータ |
CN118174200A (zh) * | 2024-05-14 | 2024-06-11 | 国网河南省电力公司新乡供电公司 | 电缆金属护套剥除装置 |
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FR1152353A (fr) * | 1956-06-15 | 1958-02-14 | Perfectionnements aux réducteurs de vitesse à engrenages | |
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FR2614568B1 (fr) * | 1987-04-28 | 1989-07-28 | Pellenc & Motte | Outil electrique portable a asservissement en position |
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CN102577844B (zh) * | 2011-01-14 | 2013-11-27 | 苏州宝时得电动工具有限公司 | 电动剪枝机 |
CN202738510U (zh) * | 2012-06-28 | 2013-02-20 | 深圳市鸿川电动工具有限公司 | 电动枝叶修剪器 |
WO2014145980A1 (fr) * | 2013-03-15 | 2014-09-18 | Creative Motion Control, Inc. | Outil doté d'un mécanisme d'entraînement linéaire |
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JP2015020257A (ja) * | 2013-07-22 | 2015-02-02 | 株式会社マキタ | 電動工具 |
CN104339327B (zh) * | 2013-07-23 | 2016-10-05 | 苏州宝时得电动工具有限公司 | 电动工具及其电剪刀附件 |
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CN104604545B (zh) * | 2015-02-12 | 2017-06-06 | 东莞市嘉航实业有限公司 | 电动修枝剪刀 |
-
2015
- 2015-06-24 FR FR1555818A patent/FR3037839B1/fr active Active
-
2016
- 2016-06-15 JP JP2017566861A patent/JP2018521868A/ja active Pending
- 2016-06-15 EP EP16750885.2A patent/EP3313623A1/fr not_active Withdrawn
- 2016-06-15 WO PCT/FR2016/051441 patent/WO2016207516A1/fr active Application Filing
- 2016-06-15 KR KR1020177037065A patent/KR20180020987A/ko unknown
- 2016-06-15 BR BR112017024999-5A patent/BR112017024999A2/pt active Search and Examination
- 2016-06-15 CN CN201680036373.1A patent/CN107810076B/zh not_active Expired - Fee Related
- 2016-06-15 US US15/567,528 patent/US20180193994A1/en not_active Abandoned
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KR20180020987A (ko) | 2018-02-28 |
US20180193994A1 (en) | 2018-07-12 |
BR112017024999A2 (pt) | 2018-07-31 |
JP2018521868A (ja) | 2018-08-09 |
WO2016207516A1 (fr) | 2016-12-29 |
FR3037839A1 (fr) | 2016-12-30 |
FR3037839B1 (fr) | 2017-12-08 |
CN107810076B (zh) | 2020-06-12 |
CN107810076A (zh) | 2018-03-16 |
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