WO2023078766A1 - Adaptateur de trépan et outil électrique - Google Patents

Adaptateur de trépan et outil électrique Download PDF

Info

Publication number
WO2023078766A1
WO2023078766A1 PCT/EP2022/080030 EP2022080030W WO2023078766A1 WO 2023078766 A1 WO2023078766 A1 WO 2023078766A1 EP 2022080030 W EP2022080030 W EP 2022080030W WO 2023078766 A1 WO2023078766 A1 WO 2023078766A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
segment
drill bit
inner sleeve
axial direction
Prior art date
Application number
PCT/EP2022/080030
Other languages
English (en)
Inventor
Haifeng Ji
Massimo Anghileri
Yongpu YAN
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2023078766A1 publication Critical patent/WO2023078766A1/fr

Links

Classifications

    • 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
    • B25F3/00—Associations of tools for different working operations with one portable power-drive means; Adapters therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
    • B23B31/1071—Retention by balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/12—Adapters for drills or chucks; Tapered sleeves
    • 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
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/0216—Overall cross sectional shape of the shank
    • B23B2231/0232—Hexagonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/04—Adapters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/46—Pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2265/00—Details of general geometric configurations
    • B23B2265/32—Polygonal
    • B23B2265/326—Hexagonal

Definitions

  • the present application relates to an electric tool, in particular to a drill bit adapter of an electric tool.
  • the present invention provides an improved drill bit adapter and electric tool, thereby effectively solving or mitigating one or more of the above problems and other problems in the prior art.
  • a drill bit adapter comprising: an outer sleeve, having a first through-hole arranged in an axial direction; an inner sleeve, mounted in the first through-hole in the axial direction, and having a second through-hole arranged in the axial direction; a shank, fixedly connected to the inner sleeve, wherein the outer sleeve and the inner sleeve are able to reciprocate in the axial direction, so that the first through-hole or the second through-hole is selectively exposed at an end of the drill bit adapter that is remote from the shank; and wherein the first through-hole and the second through-hole are used to mount a first fastener and a second fastener having different dimensions.
  • an electric tool comprising the drill bit adapter as described above.
  • the outer sleeve and inner sleeve capable of reciprocating in the axial direction enable the first through-hole or second through-hole to be selectively exposed for mounting the first fastener and second fastener having different dimensions.
  • Such a drill bit adapter arrangement at least enables the connection and operation of fasteners of two different dimensions, and includes a simple solution in which switching is achieved by forward and backward movement, so can simplify a switching action during a job, thus optimizing operation.
  • Fig. 1 shows an axial sectional schematic view of an embodiment of a drill bit adapter, wherein the drill bit adapter is switched to a first operating state, and a first fastener is not fitted.
  • FIG. 2 shows a sectional schematic view of an embodiment in which a drill bit adapter is switched to a second operating state, wherein a second fastener is not fitted.
  • FIG. 3 shows a three-dimensional schematic drawing of an embodiment of an outer sleeve of a drill bit adapter.
  • Fig. 4 shows a three-dimensional schematic drawing of an embodiment of the fit between a shank and inner sleeve of a drill bit adapter.
  • Fig. 5 shows a sectional schematic view of the fit between the shank and inner sleeve in Fig. 4.
  • Fig. 6 shows a sectional schematic view of an embodiment in which a drill bit adapter is switched to a first operating state, wherein a first fastener is fitted.
  • FIG. 7 shows a sectional schematic view of an embodiment in which a drill bit adapter is switched to a second operating state, wherein a second fastener is fitted.
  • FIG. 8 shows a sectional schematic view of an embodiment in which a drill bit adapter is switched to a third operating state, wherein the drill bit adapter is in a pre-fitting stage of the third operating state.
  • FIG. 9 shows a sectional schematic view of an embodiment in which a drill bit adapter is switched to a third operating state, wherein the drill bit adapter is in a positioning stage of the third operating state.
  • an axial direction, a radial direction and a circumferential direction are introduced here as a reference coordinate system herein.
  • This directional description is intended to express the relative positional relationships among the structural characteristics of the components themselves as well as among the components, not to impose limiting constraints on their absolute positional relationships.
  • the axial direction means the direction of shank insertion, which is presented roughly as the left-right direction in the figure;
  • the radial direction refers to the positional relationship of the shank, the inner sleeve and the outer sleeve from the inside to the outside, which can be presented roughly as the up-down direction in the figure;
  • the circumferential direction means the profile encircling direction of either sleeve.
  • FIGs 1 - 5 show an embodiment of a drill bit adapter.
  • Figs. 1 and 2 show the drill bit adapter in its entirety, while Figs. 3 - 5 show some of the components of the drill bit adapter.
  • Figs. 6 - 9 show various operating states of the drill bit adapter.
  • the drill bit adapter 100 essentially comprises, from the inside to the outside, a shank 130, an inner sleeve 120 and an outer sleeve 110, as well as a number of components arranged therein or therebetween. This solution will be first be described in general terms below, and then each structural detail will be described in turn.
  • the outer sleeve 110 of the drill bit adapter 100 has a cylindrical outer wall, and a first through-hole 111 is provided therein in the axial direction.
  • the inner sleeve 120 has an outer wall profile matched to the first through-hole 111 of the outer sleeve 110, so that it can be mounted in the first through-hole 111 in the axial direction, and the inner sleeve 120 also has a second through-hole 121 arranged in the axial direction.
  • the shank 130 of the drill bit adapter 100 is fixedly connected to the inner sleeve 120, so that the entire drill bit adapter 100 can be fitted into a mounting hole of various types of electric tool by means of the shank 130, and the drill bit adapter 100 fitted into the electric tool is fixed in a mounted position by means of a shank clamping groove 131 on the shank 130.
  • the outer sleeve 110 and inner sleeve 120 are designed to be able to reciprocate with respect to each other in the axial direction, so that the first through-hole 111 or the second through-hole 121 can be selectively exposed at the end of the drill bit adapter that is remote from the shank 130, in order to mount a first fastener 210 and a second fastener 220 with different dimensions, e.g. a screw with a dimension of 5/16 inch and a screw with a dimension of 1/4 inch, as required.
  • This solution thus at least enables the connection and operation of fasteners of two different dimensions, and includes a simple solution in which switching is achieved by forward and backward movement, so can simplify a switching action during a job, thus optimizing operation.
  • Figs. 1 - 3 show an embodiment of the outer sleeve in the drill bit adapter.
  • the first through-hole 111 of the outer sleeve is configured to have the form of a stepped hole.
  • the stepped hole may be chosen from various shapes, e.g. a cylindrical hole or a hexagonal hole, etc., as long as the fitting relationship and movement relationship between the stepped hole and the inner sleeve 120 is not affected.
  • the stepped hole comprises a first hole segment Illa, a third hole segment 111c and a second hole segment 111b arranged from left to right in the axial direction in the figures.
  • the first hole segment Illa has a larger diameter than the third hole segment 111c
  • the third hole segment 111c has a larger diameter than the second hole segment 111b.
  • a step formed between adjacent hole segments can be used to stop the inner sleeve, so that the relative movement between the outer sleeve and the inner sleeve has a defined stop position.
  • the abovementioned limiting function can in fact be realized with at least two hole segments; for example, it would be acceptable to at least provide the first hole segment Illa and the second hole segment 111b.
  • the second hole segment 111b is also used to mount the first fastener 210, while the first hole segment Illa is used to form a step with the second hole segment 111b.
  • the third hole segment 111c is provided mainly for the purpose of cooperating with a part of the inner sleeve that is used to mount a positioning ball 150; in this solution, a radial space and a closed radial space need to be formed between the third hole segment 111c and the first hole segment Illa in order to enable radial movement of the positioning ball 150, thus making it possible to clamp a drill bit inserted in the second through-hole of the inner sleeve.
  • the first hole segment Illa and third hole segment 111c may be configured to have a cylindrical shape that facilitates relative movement, while the second hole segment 111b may be configured to have a hexagonal shape for mounting the first fastener 210.
  • a limiting protrusion 112 may also be provided in the first through-hole 111 of the outer sleeve 110.
  • it is provided on the first hole segment Illa of the first through-hole 111.
  • the limiting protrusion 112 may be integrally formed with the through- hole, or realized in the form of a structure consisting of a pin 112a and a pin hole 112b.
  • the pin hole 112b may be provided in the outer sleeve 110, in such a way that it connects an outer wall of the outer sleeve 110 to the first hole segment Illa of the first through-hole 111 thereof.
  • the pin 112a is then passed through the pin hole 112b to form the limiting protrusion 112 disposed in the first through-hole 111 of the outer sleeve 110.
  • start and stop positions of axial movement between the outer sleeve 110 and the inner sleeve 120 can be defined.
  • the pin hole 112b may be configured as a radially extending through-hole.
  • it may be configured as an obliquely extending through-hole capable of connecting the outer wall of the outer sleeve 110 to the first through-hole 111 thereof, etc., as long as a pin can still be inserted therein.
  • a corresponding structural feature may also be provided to achieve the positioning thereof after movement to a specific position.
  • a mounting groove 113 may be provided in the first hole segment Illa of the first through-hole 111 of the outer sleeve 110, and an elastic positioning member 140 may be fitted into the mounting groove 113 during assembly.
  • the mounting groove 113 may be configured as a ring groove, while the elastic positioning member 140 is configured as a C-shaped ring; this makes the assembly process simpler.
  • Figs. 1, 2, 4 and 5 show an embodiment of the assembly of the shank and inner sleeve in the drill bit adapter;
  • the outer wall profile of the inner sleeve 120 is configured as a stepped part, wherein each segment forming the stepped part may be selected from various shapes, such as a cylindrical face or hexagonal face, etc., as long as normal fitting and normal relative movement are possible between it and the outer sleeve 110.
  • the stepped part comprises a first step segment 124a, a third step segment 124c and a second step segment 124b arranged in sequence in the axial direction, and these respectively correspond to the hole segments in the first through-hole of the outer sleeve that were mentioned above.
  • the third step segment 124c is further provided with a ball accommodating hole 125, which is used for connecting the third step segment 124c to the second through-hole 121 and accommodating the positioning ball 150.
  • the third step segment 124c and third hole segment 111c also correspondingly cooperate, in such a way that the positioning ball 150 is pressed so that it extends into the second through-hole 121 of the inner sleeve 120 from the ball accommodating hole 125, or in such a way that the positioning ball 150 moves back from the ball accommodating hole 125 into a gap between the first through-hole of the outer sleeve and the outer wall of the inner sleeve.
  • the ball accommodating hole 125 may be configured as a radially extending through-hole. Alternatively, it may also be configured as an obliquely extending through-hole capable of connecting the third step segment 124c to the second through-hole 121, etc., as long as it can still accommodate the positioning ball 150 and does not impede movement thereof.
  • a limiting slot 122 is further provided in the axial direction on the outer wall of the inner sleeve 120; the position of the limiting slot 122 should correspond to the limiting protrusion 112 in the outer sleeve 110, such that the limiting slot 122 can be used to accommodate and define a movement path of the limiting protrusion 112.
  • the start and stop positions of relative axial movement between the outer sleeve 110 and inner sleeve 120 are defined.
  • the axially arranged limiting slot 122 mentioned herein is not limited to being arranged perfectly in parallel with the axial direction; rather, the intention is to indicate that it has an axial groove component.
  • the limiting slot 122 may also be configured as an inclined groove having both circumferential and axial components. Such a groove cooperates with the corresponding limiting protrusion in the outer sleeve, and can likewise define the start and stop positions of movement.
  • a corresponding structural feature may also be provided to achieve the positioning thereof after movement to a specific position.
  • at least two positioning grooves 123a, 123b may also be provided on the outer wall of the inner sleeve 120, spaced apart in the axial direction; these grooves may be configured in the form of ring grooves.
  • the outer sleeve 110 and inner sleeve 120 experience relative axial movement, when either one of the two positioning grooves 123a, 123b corresponds to the mounting groove 113, the elasticity of the compressed elastic positioning member 140 accommodated in the mounting groove 113 can be partially released, causing it to extend into each positioning groove 123a, 123b from the mounting groove 113, thus achieving axial positioning between the outer sleeve 110 and the inner sleeve 120.
  • the two positioning grooves 123a, 123b thus result in there being at least two positioning points, i.e. the outer sleeve 110 and inner sleeve 120 have at least two different operating states.
  • the number of positioning grooves may also be increased or decreased depending on requirements.
  • the shank 130 may be configured to be in an interference fit with a first end of the second through-hole 121 of the inner sleeve 120.
  • a second end of the second through-hole 121 thereof may be configured to have a size and profile for mounting the second fastener 220.
  • the multiple cooperating features on the outer sleeve and inner sleeve that are mentioned above are technically interchangeable.
  • the limiting protrusion could also be provided on the outer wall of the inner sleeve, while the limiting slot is correspondingly provided in the first through-hole of the outer sleeve in the axial direction.
  • the limiting slot could also be provided on the outer wall of the inner sleeve, while at least two positioning grooves are correspondingly spaced apart axially and provided in the first through-hole of the outer sleeve.
  • FIGs. 1 and 6 show a first operating state of the drill bit adapter.
  • the outer sleeve 110 can be pulled from left to right in the axial direction relative to the inner sleeve 120.
  • the movement of the limiting protrusion 112 in the limiting slot 122 provides guidance and limiting for the movement of the outer sleeve 110 and the inner sleeve 120.
  • the elastic positioning member 140 located in the positioning groove 123a and the mounting groove 113 is pressed so that it retracts into the mounting groove 113, and when the outer sleeve 110 moves relative to the inner sleeve 120 to a position where the positioning groove 123b is aligned with the mounting groove 113, the elastic positioning member extends into the positioning groove 123b from the mounting groove, thus establishing positioning again.
  • the drill bit adapter is switched to the first operating state.
  • a screw with a dimension of 5/16 inch serving as the first fastener 210 can be fitted into the exposed first through-hole 111 of the outer sleeve, and the electric tool can then be operated to complete a fastening task.
  • FIGs. 2 and 7 show a second operating state of the drill bit adapter.
  • the outer sleeve 110 can be pushed from right to left in the axial direction relative to the inner sleeve 120.
  • the movement of the limiting protrusion 112 in the limiting slot 122 provides guidance and limiting for the movement of the outer sleeve 110 and the inner sleeve 120.
  • the elastic positioning member 140 located in the positioning groove 123b and the mounting groove 113 is pressed so that it retracts into the mounting groove 113, and when the outer sleeve 110 moves relative to the inner sleeve 120 to a position where the positioning groove 123a is aligned with the mounting groove 113, the elastic positioning member extends into the positioning groove 123a from the mounting groove, thus establishing positioning again.
  • the drill bit adapter is switched to the second operating state.
  • a screw with a dimension of 1/4 inch serving as the second fastener 220 can be fitted into the exposed first through-hole 111 of the outer sleeve, and the electric tool can then be operated to complete a fastening task.
  • FIGs. 8 - 9 show a third operating state of the drill bit adapter, respectively showing a pre-fitting stage and a positioning stage in the third operating state.
  • the outer sleeve 110 can be pulled from left to right in the axial direction relative to the inner sleeve 120.
  • the movement of the limiting protrusion 112 in the limiting slot 122 provides guidance and limiting for the movement of the outer sleeve 110 and the inner sleeve 120.
  • the elastic positioning member 140 located in the positioning groove 123a and the mounting groove 113 is pressed so that it retracts into the mounting groove 113, and when the outer sleeve 110 moves relative to the inner sleeve 120 to a position where the positioning groove 123b is aligned with the mounting groove 113, the elastic positioning member extends into the positioning groove 123b from the mounting groove, thus establishing positioning again.
  • the drill bit adapter is switched to the first operating state.
  • a drill bit 230 with a shank dimension of 1/4 inch can be inserted into the second through-hole 121 of the inner sleeve 120.
  • the drill bit 230 As the drill bit 230 is inserted, it will press the positioning ball 150 located in the ball accommodating slot 125, such that the positioning ball moves towards an accommodating gap formed between the first hole segment Illa of the first through-hole 111 of the outer sleeve 110 and the second step segment 124b of the inner sleeve 120, thereby completing pre-fitting of the drill bit.
  • the outer sleeve 110 can be pushed from right to left in the axial direction relative to the inner sleeve 120.
  • the movement of the limiting protrusion 112 in the limiting slot 122 provides guidance and limiting for the movement of the outer sleeve 110 and the inner sleeve 120.
  • the elastic positioning member 140 located in the positioning groove 123b and the mounting groove 113 is pressed so that it retracts into the mounting groove 113, and when the outer sleeve 110 moves relative to the inner sleeve 120 to a position where the positioning groove 123a is aligned with the mounting groove 113, the elastic positioning member extends into the positioning groove 123a from the mounting groove, thus establishing positioning again.
  • the positioning ball 150 will be pressed through the ball accommodating slot 125 so that it moves towards the second through-hole 121 of the inner sleeve 120, and is finally jammed in a shank recess of the drill bit 230, thus clamping and positioning the drill bit 230.
  • the electric tool can then be operated to complete a drilling task.
  • an embodiment of an electric tool is also provided here with reference to Fig. 1.
  • the electric tool comprises the drill bit adapter 100 in any one of the above embodiments or combinations thereof, and thus has the various effects which the drill bit adapter brings about, and which are not repeated here.
  • the electric tool may be an electric hammer, an impact drill or a handheld drill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Adaptateur de trépan (100) et outil électrique. L'adaptateur de trépan comprend : un manchon externe (110), ayant un premier trou traversant (111) disposé dans une direction axiale ; un manchon interne (120), monté dans le premier trou traversant dans la direction axiale, et ayant un second trou traversant (121) disposé dans la direction axiale ; une tige (130), reliée de manière fixe au manchon interne, le manchon externe et le manchon interne étant capables d'effectuer un mouvement de va-et-vient dans la direction axiale, de telle sorte que le premier trou traversant ou le second trou traversant est sélectivement exposé à une extrémité de l'adaptateur de trépan qui est à distance de la tige ; et le premier trou traversant et le second trou traversant exposés étant utilisés pour monter un premier élément de fixation (210) et un second élément de fixation (220) ayant des dimensions différentes. Ceci permet la connexion et le fonctionnement d'éléments de fixation ayant deux dimensions différentes. Comme la commutation est réalisée par un mouvement vers l'avant et vers l'arrière, une action de commutation pendant une tâche est simplifiée.
PCT/EP2022/080030 2021-11-03 2022-10-27 Adaptateur de trépan et outil électrique WO2023078766A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111292810.5A CN116061137A (zh) 2021-11-03 2021-11-03 钻头适配器及电动工具
CN202111292810.5 2021-11-03

Publications (1)

Publication Number Publication Date
WO2023078766A1 true WO2023078766A1 (fr) 2023-05-11

Family

ID=84364031

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/080030 WO2023078766A1 (fr) 2021-11-03 2022-10-27 Adaptateur de trépan et outil électrique

Country Status (2)

Country Link
CN (1) CN116061137A (fr)
WO (1) WO2023078766A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6966562B1 (en) * 2001-05-31 2005-11-22 Wienhold James L Multiple mode chuck
US20210308842A1 (en) * 2018-10-10 2021-10-07 Milwaukee Electric Tool Corporation Multi-size tool bit holder for a rotary power tool

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6966562B1 (en) * 2001-05-31 2005-11-22 Wienhold James L Multiple mode chuck
US20210308842A1 (en) * 2018-10-10 2021-10-07 Milwaukee Electric Tool Corporation Multi-size tool bit holder for a rotary power tool

Also Published As

Publication number Publication date
CN116061137A (zh) 2023-05-05

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