CN105697665A - Electric tool speed change gear box - Google Patents
Electric tool speed change gear box Download PDFInfo
- Publication number
- CN105697665A CN105697665A CN201610215410.7A CN201610215410A CN105697665A CN 105697665 A CN105697665 A CN 105697665A CN 201610215410 A CN201610215410 A CN 201610215410A CN 105697665 A CN105697665 A CN 105697665A
- Authority
- CN
- China
- Prior art keywords
- change gear
- speed change
- ring
- electric tool
- check
- 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.)
- Pending
Links
- 239000000843 powder Substances 0.000 claims description 7
- 210000002421 cell wall Anatomy 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- 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
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/04—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion with internally-toothed gears
-
- 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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
An electric tool speed change gear box comprises a gearbox shell, a speed change gear ring and a check ring; a containing cavity for containing the speed change gear ring and allowing the speed change gear ring to axially move is formed in the gearbox shell, and the check ring is fixedly assembled on the inner wall of the gearbox shell and stretches into the containing cavity in a radial manner; the check ring comprises a ring-shaped body and a plurality of check blocks which are axially and evenly arranged at intervals in a protruding manner from the end face of the body; a position check inserting groove is formed between two check blocks, and clutch inserting blocks which are matched with the position check inserting grooves in an inserting manner are arranged at the end of the speed change gear ring at intervals in a protruding manner; and due to the fact that the check blocks of the check ring are axially arranged on the check ring body in a protruding manner, the direction of extending of the check blocks along the height is consistent with the clutch direction of the speed change gear ring, the height of the check blocks can be reasonably arranged, the influence of the radial size of the containing cavity is avoided, inserting clutch reliability is high, the whole structural strength is high, use reliability is high, and the service life is long.
Description
Technical field
The present invention relates to electric tool technical field, particularly relate to a kind of change gear case of electric tool。
Background technology
Current drill type electric tool is generally of several speed operation pattern, thus generally has speed switching mechanism, to realize the output of different rotating speeds。
More typically, the speed switching mechanism of some electric tools is realized by speed change gear ring, its structure is generally speed change gear ring and coordinates with locked spacer clutch, when speed change gear ring is engaged with locked spacer, its rotation is restricted, to realize low speed output, speed change gear ring is free to rotate to realize speedy carding process when separating with locked spacer。
But, above-mentioned speed switching mechanism, in use, due to speed change gear ring and locked spacer clutch operation frequently, the easy impact wear in joint portion, increasing with the time of use, between the speed change gear ring and locked spacer that cause because wearing and tearing, fit clearance increases, and easily causes clutch quality of fit and declines, and operate in high torque, or when operating carries out speed switching, be easily caused part-structure and burst apart inefficacy, affect service life and dependability。
Summary of the invention
Based on this, it is necessary to for the problems referred to above, it is provided that a kind of structural strength is high, long service life, the change gear case of electric tool that dependability is high。
A kind of change gear case of electric tool, including tooth case shell, speed change gear ring and locating snap ring, described tooth case shell offers accommodating speed change gear ring the containing cavity moved axially for speed change gear ring, described locating snap ring is fixing to be assemblied in tooth case shell inwall and is radially in described containing cavity, described locating snap ring includes the body in loop shaped and is convexly equipped with multiple scotch from body end face axial uniform intervals, forming stop bit slot between scotch, interval, described speed change gear ring end is convexly equipped with the clutch inserted block that can coordinate with described stop bit slot grafting。
Wherein in an embodiment, the end, one end of clutch inserted block is just formed with circular arc chamfering by described scotch。
Wherein in an embodiment, described scotch connects the root lateral margin of body and is formed with reinforcing chamfer。
Wherein in an embodiment, described tooth case shell includes fore shell and back cover, the internal chamber wall of described fore shell axially offers a plurality of breach, and the screens groove that the circumference connected with each breach respectively is offered, the outer wall of described back cover is convexly equipped with a plurality of protrusion rib block, described protrusion rib block thickness and described screens groove groove width match, the body outer rim radial convex of described locating snap ring is provided with plurality of bump, described bump width and described gap width match, during assembling, each described projection is connected in the described breach of correspondence respectively, each described protrusion rib block spinner respectively is in corresponding described screens groove, hold out against after described back cover and fore shell assembly connection and place restrictions on described locating snap ring。
Wherein in an embodiment, described screens groove forms guiding port less than opposite side cell wall length in the position connecting described breach near the side cell wall length of back cover。
Wherein in an embodiment, the body of described locating snap ring, scotch and projection be one powder compacting all。
Above-mentioned change gear case of electric tool, owing to the scotch of locating snap ring is axially convexly equipped in locating snap ring body, scotch is consistent with speed change gear ring clutch direction along height bearing of trend, so scotch height can rationally be arranged according to clutch impact strength, do not need to be affected by containing cavity radial dimension, grafting clutch reliability is high, overall construction intensity is high, use procedure is not easily burst apart and structural failure, add the service life of device, and abrasion is mainly formed in scotch and clutch inserted block end in use procedure, overall clutch precision is unaffected, and dependability is high。
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Fig. 1 is middle change gear case of electric tool decomposition texture schematic diagram；
Fig. 2 is the working state schematic representation that in an embodiment, change gear case of electric tool speed change gear ring coordinates with locating snap ring grafting；
Fig. 3 is the partial structurtes enlarged drawing at A place in Fig. 1。
Wherein: 1 fore shell, 11 breach, 13 screens grooves, 131 guiding ports, 2 back covers, 21 protrusion rib block, 3 locating snap ring bodies, 31 projections, 32 scotch, 321 circular arc chamferings, 322 reinforcing chamfers, 33 stop bit slots, 4 speed change gear rings, 42 clutch inserted blocks。
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully。Accompanying drawing gives presently preferred embodiments of the present invention。But, the present invention can realize in many different forms, however it is not limited to embodiment described herein。On the contrary, the purpose providing these embodiments is to make the understanding to the disclosure more thorough comprehensively。
Such as Fig. 1, shown in Fig. 2 and Fig. 3, a kind of change gear case of electric tool, including tooth case shell, speed change gear ring 4 and locating snap ring, described tooth case shell offers accommodating speed change gear ring 4 containing cavity moved axially for speed change gear ring 4, described locating snap ring is fixing to be assemblied in tooth case shell inwall and is radially in described containing cavity, described locating snap ring includes the body in loop shaped and is convexly equipped with multiple scotch 32 from body end face axial uniform intervals, stop bit slot 33 is formed between scotch 32, interval, described speed change gear ring 4 end is convexly equipped with the clutch inserted block 42 that can coordinate with the grafting of described stop bit slot 33。
This change gear case of electric tool, owing to the scotch 32 of locating snap ring is axially convexly equipped in locating snap ring body 3, scotch 32 is consistent with speed change gear ring 4 clutch direction along height bearing of trend, so scotch 32 height can rationally be arranged according to clutch impact strength, does not need to be affected by containing cavity radial dimension。Grafting clutch reliability is high on the one hand, and overall construction intensity is high, not easily bursts apart and structural failure, add the service life of device in use procedure；On the other hand owing to scotch 32 is not take up containing cavity radial space, so being conducive to reducing electric tool radial dimension under the premise ensureing structural strength, optimize electric tool space layout。And abrasion is mainly formed in scotch 32 and clutch inserted block 42 is mutually inserted end in use procedure, overall clutch precision is unaffected, and dependability is high。
Wherein in an embodiment, the end, one end of clutch inserted block 42 is just formed with circular arc chamfering 321 by described scotch 32。Described circular arc chamfering 321 is conducive to grafting to lead, and makes clutch inserted block 42 insert stop bit slot 33 smooth and easy, decreases clutch and impacts, advantageously reduce abrasion, improves dependability, extend service life。
Wherein in an embodiment, described scotch 32 connects the root lateral margin of body and is formed with reinforcing chamfer 322。The setting of described reinforcing chamfer 322, improves the bonding strength of scotch 32 and body, and avoids scotch 32 Root Stress to concentrate, and reduces further and impacts the risk decomposed of bursting apart。
Wherein in an embodiment, described scotch 32 height of projection is not less than the 1/3 of body thickness, and is not more than 3 times of body thickness。Described scotch 32 height of projection rationally can be arranged in above-mentioned scope according to the performance requirement of the electric tool such as rotating speed, moment of torsion。
Wherein in an embodiment, described tooth case shell includes fore shell 1 and back cover 2, the internal chamber wall of described fore shell 1 axially offers a plurality of breach 11, and the screens groove 13 that the circumference connected with each breach 11 respectively is offered, the outer wall of described back cover 2 is convexly equipped with a plurality of protrusion rib block 21, described protrusion rib block 21 thickness and described screens groove 13 groove width match, the body outer rim radial convex of described locating snap ring is provided with plurality of bump 31, described projection 31 width and described breach 11 width match, during assembling, each described projection 31 is connected in the described breach 11 of correspondence respectively, each described protrusion rib block 21 spinner respectively is in corresponding described screens groove 13, hold out against after described back cover 2 and fore shell 1 assembly connection and place restrictions on described locating snap ring。So, due to the restriction to projection 31 of the described breach 11 after assembling, locating snap ring circumference movement is placed restrictions on, and it is fixed on fore shell 1 holding out against locating snap ring due to back cover 2 spinner, locating snap ring moves axially and is placed restrictions on, and places restrictions in tooth case shell so that locating snap ring is fixing, assembles simple and reliable, and it is conveniently replaceable locating snap ring, improve ease of use。
Wherein in an embodiment, described screens groove 13 forms guiding port 131 less than opposite side cell wall length in the position connecting described breach 11 near the side cell wall length of back cover 2。By described guiding port 131, during assembling, the protrusion rib block 21 of back cover 2 easily inserts and spinner is in screens groove 13, further increases assembling convenience。
Wherein in an embodiment, the body of described locating snap ring, scotch 32 and projection 31 be one powder compacting all。Metal dust molding is the technical process making briquet that the closely knit one-tenth of metal powder opisthosoma has definite shape, size, density and intensity。By the one-body molded described locating snap ring of powder technology, it is to avoid the stress in technical process gathers, structural strength is high, and functional reliability is high, and machining accuracy is high。As required, it is possible to adopt powder pressing forming or powder injection-molded。
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention。It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention。Therefore, the protection domain of patent of the present invention should be as the criterion with claims。
Claims (6)
1. a change gear case of electric tool, including tooth case shell, speed change gear ring and locating snap ring, described tooth case shell offers accommodating speed change gear ring the containing cavity moved axially for speed change gear ring, described locating snap ring is fixing to be assemblied in tooth case shell inwall and is radially in described containing cavity, it is characterized in that, described locating snap ring includes the body in loop shaped and is convexly equipped with multiple scotch from body end face axial uniform intervals, forming stop bit slot between scotch, interval, described speed change gear ring end is convexly equipped with the clutch inserted block that can coordinate with described stop bit slot grafting。
2. change gear case of electric tool according to claim 1, it is characterised in that the end, one end of clutch inserted block is just formed with circular arc chamfering by described scotch。
3. change gear case of electric tool according to claim 1, it is characterised in that described scotch connects the root lateral margin of body and is formed with reinforcing chamfer。
4. the change gear case of electric tool according to claim 1 ~ 3 any one, it is characterized in that, described tooth case shell includes fore shell and back cover, the internal chamber wall of described fore shell axially offers a plurality of breach, and the screens groove that the circumference connected with each breach respectively is offered, the outer wall of described back cover is convexly equipped with a plurality of protrusion rib block, described protrusion rib block thickness and described screens groove groove width match, the body outer rim radial convex of described locating snap ring is provided with plurality of bump, described bump width and described gap width match, during assembling, each described projection is connected in the described breach of correspondence respectively, each described protrusion rib block spinner respectively is in corresponding described screens groove, hold out against after described back cover and fore shell assembly connection and place restrictions on described locating snap ring。
5. change gear case of electric tool according to claim 4, it is characterised in that described screens groove forms guiding port less than opposite side cell wall length in the position connecting described breach near the side cell wall length of back cover。
6. change gear case of electric tool according to claim 4, it is characterised in that the body of described locating snap ring, scotch and projection be one powder compacting all。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215410.7A CN105697665A (en) | 2016-04-08 | 2016-04-08 | Electric tool speed change gear box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610215410.7A CN105697665A (en) | 2016-04-08 | 2016-04-08 | Electric tool speed change gear box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105697665A true CN105697665A (en) | 2016-06-22 |
Family
ID=56219626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610215410.7A Pending CN105697665A (en) | 2016-04-08 | 2016-04-08 | Electric tool speed change gear box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105697665A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113370153A (en) * | 2021-06-30 | 2021-09-10 | 中国航发贵州黎阳航空动力有限公司 | Torque amplification type nut dismounting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748433A (en) * | 2006-08-01 | 2012-10-24 | 创科电动工具科技有限公司 | Variable speed transmission for a power tool |
| CN203202166U (en) * | 2013-06-17 | 2013-09-18 | 东莞百事得电动工具有限公司 | Speed change gear box of electric tools |
| CN103376683A (en) * | 2012-04-25 | 2013-10-30 | 上福全球科技股份有限公司 | Transmission assembly of photosensitive drums |
| WO2014133229A1 (en) * | 2013-02-26 | 2014-09-04 | 계양전기 주식회사 | Housing structure of gear box for electric tool |
| CN104930067A (en) * | 2015-05-08 | 2015-09-23 | 江苏联动轴承有限公司 | Ball loading device of high-efficiency angular contact bearing |
| CN204954774U (en) * | 2015-08-07 | 2016-01-13 | 群胜科技（苏州）有限公司 | Speed auto -change over device of electric tool gear box |
-
2016
- 2016-04-08 CN CN201610215410.7A patent/CN105697665A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748433A (en) * | 2006-08-01 | 2012-10-24 | 创科电动工具科技有限公司 | Variable speed transmission for a power tool |
| CN103376683A (en) * | 2012-04-25 | 2013-10-30 | 上福全球科技股份有限公司 | Transmission assembly of photosensitive drums |
| WO2014133229A1 (en) * | 2013-02-26 | 2014-09-04 | 계양전기 주식회사 | Housing structure of gear box for electric tool |
| CN203202166U (en) * | 2013-06-17 | 2013-09-18 | 东莞百事得电动工具有限公司 | Speed change gear box of electric tools |
| CN104930067A (en) * | 2015-05-08 | 2015-09-23 | 江苏联动轴承有限公司 | Ball loading device of high-efficiency angular contact bearing |
| CN204954774U (en) * | 2015-08-07 | 2016-01-13 | 群胜科技（苏州）有限公司 | Speed auto -change over device of electric tool gear box |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113370153A (en) * | 2021-06-30 | 2021-09-10 | 中国航发贵州黎阳航空动力有限公司 | Torque amplification type nut dismounting device |
| CN113370153B (en) * | 2021-06-30 | 2022-09-30 | 中国航发贵州黎阳航空动力有限公司 | Torque amplification type nut dismounting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160622 |
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| RJ01 | Rejection of invention patent application after publication |