GB2412146A - Idle gear switch for drill - Google Patents

Idle gear switch for drill Download PDF

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Publication number
GB2412146A
GB2412146A GB0405918A GB0405918A GB2412146A GB 2412146 A GB2412146 A GB 2412146A GB 0405918 A GB0405918 A GB 0405918A GB 0405918 A GB0405918 A GB 0405918A GB 2412146 A GB2412146 A GB 2412146A
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GB
United Kingdom
Prior art keywords
gear
idle
engaged
transferring
idle gear
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.)
Granted
Application number
GB0405918A
Other versions
GB0405918D0 (en
GB2412146B (en
Inventor
Ling-Ling Yu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0405918A priority Critical patent/GB2412146B/en
Publication of GB0405918D0 publication Critical patent/GB0405918D0/en
Publication of GB2412146A publication Critical patent/GB2412146A/en
Application granted granted Critical
Publication of GB2412146B publication Critical patent/GB2412146B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/40—Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
    • 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
    • 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
    • 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
    • F16H3/46—Gearings having only two central gears, connected by orbital gears
    • F16H3/48—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital 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
    • 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
    • F16H3/46—Gearings having only two central gears, connected by orbital gears
    • F16H3/58—Gearings having only two central gears, connected by orbital gears with sets of orbital gears, each consisting of two or more intermeshing orbital 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/48—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part having pins arranged parallel to the axis and entering holes in the other coupling part
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
    • F16D3/56—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load
    • F16D3/58—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members comprising elastic metal lamellae, elastic rods, or the like, e.g. arranged radially or parallel to the axis, the members being shear-loaded collectively by the total load the intermediate members being made of rubber or like material

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)

Abstract

A gearing switch device includes a switch assembly (4, fig 1) that is switched to one of a number of positions to engage one of the gears (51, 52, fig 1) in an idle gear set (5, fig 1) with an input gear 1 and a transferring gear 34 of a speed reduction device 3. The transferring gear 34 drives a ring gear 33 that is engaged with a planetary gear device connected to one side of a disk (31, fig 1) and an output gear (31a, fig 1) is connected to the other side of the disk (31, fig 1). Different types of engagement between the gears (51, 52, fig 1) of the idle gear set (5, fig 1) and the transferring gear 34 change, the speed of the disk (31, fig 1) to a desired output torque. The switch device is suitable for use in a drill.

Description

MULTIPLE GEARING SWITCH DEVICE
BACKGROUND OF THE INVENTION
1.Field of the Invention
The present invention relates to a multiple gearing switch device that employs a switch assembly and an idle gear set to operate a planetary gear speed reduction device so as to obtain multiple output speeds in desired directions.
2. The Related Art Conventional electric tools, especially those including spinning device, generally employ a speed reduction device to provide multiple gearing feature and have different output torques. The speed reduction device includes a planetary gear system including a sun gear, a plurality of planet gears, inner gears and a disk. These gears and disk are arranged to play different roles, such as input or output members, so as to have different output speeds. Nevertheless, complicated assembling and/or manufacturing difficulties are involved in the existing electric tools with multiple gearing switch device such that high price and risk of maintenance are commonly seen, which does not satisfy the users.
Besides, only two or three speeds can be chosen because of limitations of the conventional gearing switch device.
Therefore, it is desired to have a gearing switch device that is able to improve one or more problems existing in the conventional gearing switch device.
SUMMARY OF THE INVENTION
In accordance with an aspect of the present invention, there is provided a gearing switch device that comprises a casing in which a speed reduction device is received and includes a disk which has a plurality of planet gears on a first side of the disk and an input gear is located between and engaging the planet gears. An output gear is connected to the other side of the disk. A ring gear has inner teeth engaging the planet gears, and outer teeth engaging two transferring gears connected to the casing. A switch assembly has a switch member with a plurality of recesses defined in an outer periphery thereof and the transferring gears are located in the recesses. Each recess has engaging teeth defined in a side thereof. A protrusion extends radially outward from the switch member and through a slot defined through a wall of the casing. A plurality of idle gear sets is connected to a side of the switch member and each has a first idle gear and a second idle gear. Teeth of each of the first idle gear and the second idle gear are located in alignment with the engaging teeth of the recesses. The first idle gear and the second idle gear are located at different radial positions such that only one of the first idle gear and the second idle gear is engaged with the input gear in the same time. One of the first and second idle gears or the engaging teeth selectively engage the transferring gears.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an exploded view of a gearing switch device in accordance with the present invention; Figure 2 shows an input gear engaging planet gears which engage a ring gear and two transferring gears engage the ring gear; Figure 3 shows the flexible boss on the casing is engaged with one of the notches of the switching knob; Figure 4 shows that the teeth of the insides are engaged with the transferring gears and the first idle gears are engaged with the input gear; Figure 5 shows that the first idle gears are engaged with the transferring gears and the input gear; Figure 6 shows that the second idle gears are engaged with the transferring gears and the first idle gears are engaged with the input gear; Figure 7 shows that the first idle gears are composed of an upper gear and a lower gear; Figure 8 shows that the second idle gears are composed of an upper gear and a lower gear; Figure 9 shows that the input gear is composed of an upper portion and a lower portion, and Figure 10 shows that the transferring gear is composed of an upper transferring gear and a lower transferring gear.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings and in particular to Figures 1 and 2, a gearing switching device of the present invention is received in a receiving space 21 defined in a casing 2 of a tool that is not shown. The gearing switching device comprises an input gear 1 and a speed reduction device 3 is received in the casing 2 and has a disk 31 that has four planet gears 32 on a first side of the disk 31 and the input gear 1 is located between and engaged with the planet gears 32. An output gear 31a is connected to the other side of the disk 31 and drives an output shaft that is not shown. A ring gear 33 has inner teeth 33a in an inner periphery and outer teeth 33b in an outer periphery of the ring gear 33. The planet gears 32 are engaged with the inner teeth 33a, and two transferring gears 34 are connected to the casing 2 and engaged with the outer teeth 33b.
A switch assembly 4 has a switch member 41 with a central hole 41a for the input gear 1 to extend therethrough and two recesses 41b are defined in an outer periphery of the switch member 41 such that the transferring gears 34 are located in the two recesses 41b. Each recess 41b has engaging teeth 41c defined in a side thereof. A protrusion 41d extends radially outward from the switch member 41 and through a slot 22 defined through a wall of the casing 2. Further referring to Figure 3, a switching knob 42 is connected to the protrusion 41d and has a plurality of notches 42a. A flexible boss 23 extends from an outer periphery of the casing 2 and located beside the slot 22. The flexible boss 23 is engaged with one of the notches 42 when the switching knob 42 is shifted by the user.
Two idle gear sets 5 are connected to a side of the switch member 41 and each idle S gear set 5 has a first idle gear 51 and a second idle gear 52. Teeth of each of the first idle gear 51 and the second idle gear 52 are located in alignment with the engaging teeth 41c of the recesses 41. The first idle gear 51, the second idle gear 52 and the engaging teeth 41c are located at different radial positions such that only one of the first idle gear 51, the second idle gear 52 and the engaging teeth 41c can be engaged with the input gear 1 in the same time.
Referring to Figure 4, when shifting the switching member 41 by shifting the switching knob 42 to a position as shown, only the engaging teeth 41c are engaged with the transferring gears 34, so that transferring gears 34 are stationary. Because the transferring gears 34 are engaged with the ring gear 33 so that the ring gears 33 is stationary. Therefore, the power brought by the input gear 1 drives the planet gears 32, the first idle gears 51 and the second idle gears 52. The first idle gears 51 and the second idle gears 52 do not drive any part and the planet gears 32 are rotated in the ring gear 33 so that the speed of the disk 31 together with the output gear 31a is reduced. The output torque is increased.
Referring to Figure 5, when shifting the switching member 41 to another position as shown, the first idle gears 51 are engaged with the transferring gears 34 and driven by the input gear 1. The transferring gears 34 rotate in the same direction as the input gear 1.
The transferring gears 34 drives the ring gear 33 so that the power brought by the input gear 1 drives the planet gears 32, the first idle gears 51 and the second idle gears 52 which do not drive any part. The planet gears 32 are rotated relative to the ring gear 33 so that the speed of the disk 31 together with the output gear 31a is reduced. The output torque is increased.
Referring to Figure 6, when the switching member 41 is shifted to yet another position as shown, only the second idle gears 52 are engaged with the transferring gears 34 and the second idle gears 52 are driven by the first idle gears 51 which is driven by the input gear 1. The transferring gears 34 rotate in the opposite direction of the input gear 1.
The transferring gears 34 drives the ring gear 33 so that the power brought by the input gear 1 drives the planet gears 32, the first idle gears 51 and the second idle gears 52. The planet gears 32 are rotated relative to the ring gear 33 so that the speed of the disk 31 together with the output gear 31a is reduced. The output torque is increased.
It is noted that the power from the input gear 1 is transferred to the speed reduction device 3 via the idle gear set 5 and the transferring gears are driven by the idle gear set 5 to drive the ring gear 33 at different speed and directions so as to obtain different speed and directions for the disk 31 and the output gear 31a. Therefore, different types of arrangement of the idle gear set 5, the transferring gears 34 and the input gear 1 may obtain multiple gearing functions, and are described hereinafter.
Referring to Figure 7, the first idle gear 51 that is engaged with the input gear 1 of each of the idle gear sets 5 includes an upper gear 51a and a lower gear 51b that is co axially connected to the upper gear 51a. The upper gear 51a and the lower gear 51b have different number of teeth. The upper gear 51a is engaged with the second idle gear 52 and the lower gear 51b is engaged with the transferring gear 34.
Referring to Figure 8, the second idle gear 52 that is not engaged with the input gear 1 of each of the idle gear sets 5 includes an upper gear 52a and a lower gear 52b which is co-axially connected to the upper gear 52a. The upper gear 52a and the lower gear 52b have different number of teeth. The upper gear 52a is engaged with the first idle gear 51 and the lower gear 51b is engaged with the transferring gear 34.
Referring to Figure 9, the input gear 1 includes an upper portion 11 and a lower portion 12 that is co-axially connected to the upper portion 11. The upper portion 11 and the lower portion 12 have different number of teeth. The upper portion 11 is engaged with the first idle gear 51, and the lower portion 12 is engaged with planet gears 32.
Referring to Figure 10, the transferring gear 34 includes an upper transferring gear 34a and a lower transferring gear 34b that is co-axially connected to the upper transferring gear 34a. The upper transferring gear 34a and the lower transferring gear 34b have different number of teeth. The upper transferring gear 34a is engaged with one of the first idle gear 51 or the second idle gear 52 in the same idle gear set 5 and the lower transferring gear 34b is engaged with the gear ring 33.
It is also noted that a number of the gears in each of the idle gear set 5 can be increased, or adding some gears that can change speed in the idle gear set 5 so as to obtain more options of the gearing features.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims (9)

  1. WHAT IS CLAIMED IS: 1. A gearing switch device comprising: an input gear;
    a casing having a receiving space and a slot defined through a wall of the casing; a speed reduction device received in the casing and having a disk which has a plurality of planet gears on a first side of the disk and the input gear located between and engaged with the planet gears, an output gear connected to the other side of the disk, a ring gear having inner teeth in an inner periphery and outer teeth in an outer periphery of the ring gear, the planet gears engaged with the inner teeth, a plurality of transferring gears connected to the casing and engaged with the outer teeth; a switch assembly having a switch member with a central hole and a plurality of recesses defined in an outer periphery of the switch member such that the transferring gears located in the recesses, each recess having engaging teeth defined in a side thereof, a protrusion extending radially outward from the switch member and through the slot of the casing; a plurality of idle gear sets connected to a side of the switch member each having a first idle gear and a second idle gear, teeth of each of the first idle gear and the second idle gear located in alignment with the engaging teeth of the recesses, the first idle gear, the second idle gear and the engaging teeth located at different radial positions such that only one of the first idle gear, the second idle gear and the engaging teeth is engaged with the input gear in the same time, one of the first idle gear, the second idle gear or the engaging teeth being alternatively engaged with the transferring gears.
  2. 2. The switch device as claimed in Claim 1, wherein a flexible boss extends from an outer periphery of the casing and located beside the slot, a switching knob connected to the protrusion and having a plurality of notches so that the flexible boss is engaged with one of the notches.
  3. 3. The switch device as claimed in Claim 1, wherein the first idle gear that is engaged with the input gear of each of the idle gear sets includes an upper gear and a lower gear which is co-axially connected to the upper gear, the upper gear and the lower gear having different number of teeth, the upper gear engaged with the second idle gear in the same idle gear set and the lower gear engaged with the transferring gear.
  4. 4. The switch device as claimed in Claim 1, wherein the second idle gear that is not engaged with the input gear of each of the idle gear sets includes an upper gear and a lower gear which is co-axially connected to the upper gear, the upper gear and the lower gear having different number of teeth, the upper gear engaged with the first idle gear in the same idle gear set and the lower gear engaged with the transferring gear.
  5. 5. The switch device as claimed in Claim 1, wherein the input gear includes an upper portion and a lower portion which is co-axially connected to the upper portion, the upper portion and the lower portion having different number of teeth, the upper portion engaged with one of the first idle gear and the second idle gear, the lower portion engaged with planet gears.
  6. 6. The switch device as claimed in Claim 1, wherein the transferring gear includes an upper transferring gear and a lower transferring gear which is co-axially connected to the upper transferring gear, the upper transferring gear and the lower transferring gear having different number of teeth, the upper transferring gear engaged with one of the first idle gear and the second idle gear in the same idle gear set and the lower transferring gear engaged with the gear ring.
  7. 7. The switch device as claimed in Claim 1, wherein a number of the idle gears in each of the idle gear set can be increased.
  8. 8. The switch device as claimed in Claim 1, wherein a number of the idle gears composed of an upper gear and a lower gear in each of the idle gear set is increased.
  9. 9. A multiple gearing switch device constructed and arranged substantially as described in relation to Figs. 1-6, or Fig 7, or Fig 8, or Fig. 9, or Fig. 10 of the accompanying drawings.
GB0405918A 2004-03-17 2004-03-17 Multiple gearing switch device Expired - Fee Related GB2412146B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0405918A GB2412146B (en) 2004-03-17 2004-03-17 Multiple gearing switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0405918A GB2412146B (en) 2004-03-17 2004-03-17 Multiple gearing switch device

Publications (3)

Publication Number Publication Date
GB0405918D0 GB0405918D0 (en) 2004-04-21
GB2412146A true GB2412146A (en) 2005-09-21
GB2412146B GB2412146B (en) 2008-01-30

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ID=32117807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0405918A Expired - Fee Related GB2412146B (en) 2004-03-17 2004-03-17 Multiple gearing switch device

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360380A (en) * 1990-11-23 1994-11-01 Nottle Murray K Variable ratio epicyclic transmission
US6086502A (en) * 1999-03-05 2000-07-11 Chung; Lee Hsin-Chih Switching device of reduction gear set
US6162143A (en) * 1998-10-07 2000-12-19 Robert Bosch Gmbh Two speed transmission in particular pre-transmission for auxiliary aggregate in motor vehicles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5360380A (en) * 1990-11-23 1994-11-01 Nottle Murray K Variable ratio epicyclic transmission
US6162143A (en) * 1998-10-07 2000-12-19 Robert Bosch Gmbh Two speed transmission in particular pre-transmission for auxiliary aggregate in motor vehicles
US6086502A (en) * 1999-03-05 2000-07-11 Chung; Lee Hsin-Chih Switching device of reduction gear set

Also Published As

Publication number Publication date
GB0405918D0 (en) 2004-04-21
GB2412146B (en) 2008-01-30

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110317