CN109968278A - Bicycle crank and the synchronous extracting tool of crank screw - Google Patents
Bicycle crank and the synchronous extracting tool of crank screw Download PDFInfo
- Publication number
- CN109968278A CN109968278A CN201910354115.3A CN201910354115A CN109968278A CN 109968278 A CN109968278 A CN 109968278A CN 201910354115 A CN201910354115 A CN 201910354115A CN 109968278 A CN109968278 A CN 109968278A
- Authority
- CN
- China
- Prior art keywords
- crank
- extracting tool
- screw
- screw rod
- sleeve
- 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
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 7
- 210000000078 claw Anatomy 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
-
- 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
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Automatic Assembly (AREA)
Abstract
The invention discloses a kind of bicycle crank and the synchronous extracting tool of crank screw, which is nesting type structure, and center is the left-handed screw rod with magnetic suction head；Middle layer is the levogyrate inner thread sleeve cooperated with screw rod；Outermost layer is the sliding rail sleeve for being equipped with claw, and thrust bearing is equipped between sliding rail sleeve bottom side and levogyrate inner thread sleeve flange.The extracting tool can dismantle crank while dismantling crank screw, no replacement is required tool, and efficiency is higher.
Description
Technical field
The present invention relates to a kind of bicycle extracting tool, specifically a kind of crank and the synchronous extracting tool of crank screw.
Background technique
The disassembly of standard bicycle crank is first screwed out the screw (12) of fixed crank (11) with spanner, then using special
With drawing horse to eject crank from axis (13), axis is then mounted on five logical (14).The shortcomings which is, need using
Two kinds of extracting tool substeps are dismantled, and process is relatively complicated, and tool is needed replacing in disassembly process, and it is longer to expend the time.
Summary of the invention
The technical problem to be solved in the invention is to overcome the shortcomings of background technique, provides a kind of relatively easy conjunction of structure
Reason, can dismantle the tool of crank and crank screw simultaneously.
Main design thought of the invention is: firstly, using the straight-line displacement during crank screw disassembling, by crank from
It is pulled out on axis, the mobile linear distance of screw is moving distance of the crank on axis；Secondly, different bicycle structures are past
Toward different, but the crank of vehicle body two sides at least side and five it is logical between remain with certain interval, utilize the gap to realize and " pull
The movement of crank " further realizes synchronous disassembly.
Present invention preserves traditional, the disassembly bearing outer ring lead screw (4) for drawing horse, sliding rail sleeve (1) and claws (10)
Structure, claw (10) are assemblied on sliding rail sleeve by fixed block (9), bolt (7) and nut (8), can be moved along sliding rail.It tears open
The specific technical solution for unloading tool is that, using a left-handed lead screw (4), lower end is welded with magnetic suction head (5), and being configured with can root
Head (6) are dismantled according to the changeable type of crank screw sizes shape replacement.Screw rod and levogyrate inner thread sleeve (3) cooperate, sliding rail set
Cylinder (1) is covered in a manner of clearance fit again on levogyrate inner thread sleeve (3).Sliding rail sleeve (1) and levogyrate inner thread sleeve are convex
There are thrust bearing (2) between edge (3-1), the planar friction between sliding rail sleeve and levogyrate inner thread sleeve can be effectively reduced, prevents
It only produces relative rotation between screw rod and levogyrate inner thread sleeve in disassembly process, influences to dismantle effect.
Structure of the invention is relatively easy, relatively reasonable, can dismantle crank and crank screw simultaneously, has removal efficiency higher
The advantages of, it is the innovation to bicycle extracting tool.
Detailed description of the invention
Fig. 1 is the axis surveys view of the extracting tool.
Fig. 2 is the explosive view of the extracting tool.
Fig. 3 is the axis surveys view of bicycle crank installation position.
Fig. 4 is 1 schematic diagram of demounting procedure.
Fig. 5 is 2 schematic diagram of demounting procedure.
Fig. 6 is 3 schematic diagram of demounting procedure.
Fig. 7 schematic diagram that left-handed screw rod acts on crank screw when being stationary jaw.
The schematic diagram that dextrorotation screw rod acts on crank screw when Fig. 8 is stationary jaw.
Fig. 9 is the stress diagram of levogyrate inner thread sleeve when dismantling crank screw and crank.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Extracting tool embodiment 1.See that Fig. 1, Fig. 2, the extracting tool of this example use nesting type structure, center is with magnetic
The left-handed screw rod (4) of head (5)；Middle layer is the levogyrate inner thread sleeve (3) cooperated with screw rod, which has thrust bearing (2) peace
Fill position --- flange (3-1), outer hexagonal spanner position (3-2)；Outermost layer is the sliding rail sleeve (1) for being equipped with claw (10).
Use example 1.See Fig. 4, Fig. 5, Fig. 6, respectively corresponds demounting procedure 1,2,3.Step 1 first opens claw, will dismantle
Head alignment crank screw；Step 2 first by claw end be caught in crank and five it is logical between gap, then direction is twisted as shown in Figure 5
Tight levogyrate inner thread sleeve, stationary jaw；Direction turns left-handed screw rod to step 3 as shown in Figure 6, after screwing out crank screw, if bent
Handle is not completely pulled out yet, is pulled out at sliding rail sleeve sliding rail, is slightly exerted a force, disassembly can be completed.
It the reason of to be described in detail using left-handed screw rod, is supplemented as follows:
Comparative example 1.See Fig. 7, Fig. 8, using (Fig. 7) when left-handed screw rod, direction as shown is tightened inner thread sleeve (3), is driven and is slided
Rail sleeve (1) and claw (10) move up (s1).There are frictional force between screw rod (4) when due to inner thread sleeve (3) rotation, make
Screw rod is obtained also by the torque in the same direction with M, which makes crank screw have the tendency that precession (s2), with sliding rail sleeve
Mutual cooperation is moved up, achievees the effect that stationary jaw.Using (Fig. 8) when dextrorotation lead screw, when the torque that screw rod is subject to is larger, meeting
Crank screw is set to screw out (s2), it can not stationary jaw.
Stress example 1.See Fig. 9, applies the torque M in diagram direction in disassembly process to screw rod.Ideally, use is left-handed
When screw rod, since quiet wiping coefficient is much larger than coefficient of rolling friction, therefore the maximum static friction force of screw rod (4) internal threads sleeve (3)
f1Much larger than the frictional force f of thrust bearing (2) internal threads sleeve (3)2, therefore inner thread sleeve (3) can be with screw rod (4) together
The straight-line displacement of crank screw is passed to crank by rotation, realizes synchronous disassembly；In actual use, due to rigging error etc. because
Element, very likely internal threads sleeve (3) generates additional frictional force f to sliding rail sleeve (1)3, make f2+f3> f1, make inner screw sheath
Cylinder (3) has the tendency that moving up, and then sliding rail sleeve (1) and claw (10) is made also to move up trend, makes claw in disassembly process
(10) fixation is relatively reliable.Similarly, according to dextrorotation screw rod, then in disassembly process the stress condition of inner thread sleeve (3) with
It is consistent when left-handed, but has the trend of moving down under that force or even move down, disassembly process is made to tend to be unreliable.
Claims (5)
1. a kind of bicycle crank and the synchronous extracting tool of crank screw, including sliding rail sleeve (1), screw rod (4), claw (10),
It is characterized in that the screw rod uses sinistral external thread, and there is matched levogyrate inner thread sleeve (3).
2. extracting tool according to claim 1, it is characterised in that described screw rod (4) lower end have magnetic suction head (5) and
Matched changeable type dismantles head (6).
3. extracting tool according to claim 1, it is characterised in that there is flange in described levogyrate inner thread sleeve (3) lower end
(3-1).
4. extracting tool according to claim 1 or 3, it is characterised in that described levogyrate inner thread sleeve (3) top is
Outer hexagonal (3-2).
5. extracting tool described according to claim 1 or 3 or 4, it is characterised in that the sliding rail sleeve (1) and left-handed interior spiral shell
There are thrust bearing (2) between line sleeve flange (3-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910354115.3A CN109968278A (en) | 2019-04-29 | 2019-04-29 | Bicycle crank and the synchronous extracting tool of crank screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910354115.3A CN109968278A (en) | 2019-04-29 | 2019-04-29 | Bicycle crank and the synchronous extracting tool of crank screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109968278A true CN109968278A (en) | 2019-07-05 |
Family
ID=67086937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910354115.3A Pending CN109968278A (en) | 2019-04-29 | 2019-04-29 | Bicycle crank and the synchronous extracting tool of crank screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109968278A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4649732A (en) * | 1985-08-12 | 1987-03-17 | Deutsch Fastener Corp. | Fastener installation tool |
| US5974644A (en) * | 1998-02-05 | 1999-11-02 | Neinast; Timothy Ray | Bicycle pedal crank dismounting tool |
| DE202007003026U1 (en) * | 2007-03-01 | 2007-08-09 | Hu, Chih Kuo | Bearing assembling and disassembling device, has drive with threaded spindle that comprises drive element for tool, and that is guided through base body, where body exhibits semicircular accommodating area to accommodate rotating body |
| CN102189528A (en) * | 2011-05-02 | 2011-09-21 | 林勇 | Detachable air conditioner bolt mounting device |
| CN203171535U (en) * | 2013-04-06 | 2013-09-04 | 广西玉柴机器股份有限公司 | Axial withdrawal tool of hinge pin |
| CN203804897U (en) * | 2014-04-24 | 2014-09-03 | 边财浪 | Multi-functional puller |
| CN104084926A (en) * | 2014-06-26 | 2014-10-08 | 中国石油化工股份有限公司 | Detachment device and detachment method for detaching crank pin and crank shaft sleeve |
| CN105729387A (en) * | 2016-04-29 | 2016-07-06 | 吴玉林 | Complex pull-out mechanism |
| CN209868465U (en) * | 2019-04-29 | 2019-12-31 | 山东大学深圳研究院 | Synchronous disassembling tool for bicycle crank and crank screw |
-
2019
- 2019-04-29 CN CN201910354115.3A patent/CN109968278A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4649732A (en) * | 1985-08-12 | 1987-03-17 | Deutsch Fastener Corp. | Fastener installation tool |
| US5974644A (en) * | 1998-02-05 | 1999-11-02 | Neinast; Timothy Ray | Bicycle pedal crank dismounting tool |
| DE202007003026U1 (en) * | 2007-03-01 | 2007-08-09 | Hu, Chih Kuo | Bearing assembling and disassembling device, has drive with threaded spindle that comprises drive element for tool, and that is guided through base body, where body exhibits semicircular accommodating area to accommodate rotating body |
| CN102189528A (en) * | 2011-05-02 | 2011-09-21 | 林勇 | Detachable air conditioner bolt mounting device |
| CN203171535U (en) * | 2013-04-06 | 2013-09-04 | 广西玉柴机器股份有限公司 | Axial withdrawal tool of hinge pin |
| CN203804897U (en) * | 2014-04-24 | 2014-09-03 | 边财浪 | Multi-functional puller |
| CN104084926A (en) * | 2014-06-26 | 2014-10-08 | 中国石油化工股份有限公司 | Detachment device and detachment method for detaching crank pin and crank shaft sleeve |
| CN105729387A (en) * | 2016-04-29 | 2016-07-06 | 吴玉林 | Complex pull-out mechanism |
| CN209868465U (en) * | 2019-04-29 | 2019-12-31 | 山东大学深圳研究院 | Synchronous disassembling tool for bicycle crank and crank screw |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190705 |