CN209194164U - A kind of length-adjustable crank connecting link - Google Patents
A kind of length-adjustable crank connecting link Download PDFInfo
- Publication number
- CN209194164U CN209194164U CN201822096168.3U CN201822096168U CN209194164U CN 209194164 U CN209194164 U CN 209194164U CN 201822096168 U CN201822096168 U CN 201822096168U CN 209194164 U CN209194164 U CN 209194164U
- Authority
- CN
- China
- Prior art keywords
- arm body
- connecting link
- crank connecting
- length
- hole
- 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.)
- Expired - Fee Related
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- Sewing Machines And Sewing (AREA)
Abstract
The utility model belongs to sewing device technical field, is related to a kind of length-adjustable crank connecting link, which solve existing crank connecting link when connecting with retainer, installation difficulty is big the problems such as.This crank connecting link includes ontology, one end of ontology offers connecting hole, the other end of ontology is connected with arch clamp arm, arch clamp arm includes upper arm body and lower arm body, the outer end of upper arm body and the outer end of lower arm body offer the mounting hole for connection retainer, the inner end of upper arm body and the inner end of lower arm body are slidably connected, and the positioning mechanism that can make that the two is relatively fixed and loosens is provided between upper arm body and lower arm body.The utility model can reduce installation difficulty when connecting with retainer.
Description
Technical field
The utility model belongs to sewing device technical field, is related to a kind of length-adjustable crank connecting link.
Background technique
Crank rod assembly is widely used as a kind of transmission device in machinery field, the biography on sewing machine
System crank connecting link is the plate armature equipped with stub end and small head end, is equipped in the side of the small head end of crank connecting link and keeps dress
It sets, You Yigen connecting pin connecting crank connecting rod and holding meanss, crank connecting link is using connecting pin as axis rotation.Holding meanss and song
The effect that will appear power during handle link motion leads on connecting pin that there are two points by not due to there was only a connecting pin
With the effect of power, so that connecting pin abrasion easily be made even to be broken, the service life of crank rod assembly is reduced.
To solve the above-mentioned problems, 203128825 U of China's patent CN discloses a kind of crank rod assembly, including song
Handle connecting rod, retainer and shank set, the small head end of crank connecting link are equipped with arch clamp arm, and stub end is equipped with macropore, and shank set is rotatable
In retainer, retainer is rotatably arranged in arch clamp arm, and arch clamp arm is equipped with two identical circular hole A of coaxial line,
Retainer upper and lower ends are respectively equipped with circular hole B corresponding with two circular hole A of arch clamp arm, and crank rod assembly is equipped with connecting crank
The balancing plug and connecting pin of connecting rod and retainer.By the small head end in crank connecting link, one arch clamp arm, retainer position are set
In in arch clamp arm, the work from retainer can be shared by balancing plug and connection pin connection cramp frame arm and retainer, balancing plug
With improving the service life of this crank rod assembly.
But since the requirement on machining accuracy of retainer is higher, if error is larger, then it is easy to occur between crank connecting link
Clamping stagnation is difficult to install.
Utility model content
The purpose of this utility model is the presence of the above problem in view of the prior art, proposes a kind of length-adjustable crank
Connecting rod, the technical problem to be solved by the utility model is to how to reduce installation of this crank connecting link when connecting with retainer
Difficulty.
The purpose of this utility model can be realized by the following technical scheme:
A kind of length-adjustable crank connecting link, the crank connecting link include ontology, and one end of the ontology offers connection
Hole, the other end of the ontology are connected with arch clamp arm, which is characterized in that and the arch clamp arm includes upper arm body and lower arm body,
The outer end of the upper arm body and the outer end of lower arm body offer the mounting hole for connection retainer, the inner end of the upper arm body
It is slidably connected with the inner end of lower arm body, and is provided between the upper arm body and lower arm body and both can make relatively fixed and loosen
Positioning mechanism.
Its working principles are as follows: this crank connecting link is when in use, upper arm body and lower arm body can first be made to be in the state loosened,
Then retainer is placed in arch clamp arm, after adjusting the distance between upper arm body, lower arm body and retainer, is then passed through
Positioning mechanism keeps upper arm body and lower arm body relatively fixed, then retainer is connected with upper arm body and lower arm body.Due to this
Upper arm body and lower arm body in application opposite can slide, and spacing between the two is adjusted, so that the processing for compensating retainer misses
Difference reduces installation difficulty when crank connecting link is connect with retainer.
In a kind of above-mentioned length-adjustable crank connecting link, the inner face of the upper arm body open up it is fluted, under described
The inner face of arm body has the boss that can be plugged in the groove.After designing fluted and boss, so that upper arm body is under
Arm body opposite can be slided and is adjusted.
In a kind of above-mentioned length-adjustable crank connecting link, the cross section of the groove and boss is square.Groove
Rectangular, avoidable upper arm body and the relative rotation of lower arm body are designed as with the cross section of boss.
In a kind of above-mentioned length-adjustable crank connecting link, square washer, the rectangular pad are arranged on the boss
Circle can mutually recline with the inner face of the upper arm body.It, can be by increasing or decreasing square washer after design has square washer
Number adjusts the distance between upper arm body and lower arm body.
In a kind of above-mentioned length-adjustable crank connecting link, the upper arm body offer be connected with the groove it is upper
Through-hole, the lower arm body offer the lower through-hole through the boss, the upper through-hole and lower through-hole coaxial arrangement, the positioning
Mechanism includes the bolt for sequentially passing through through-hole, groove and lower through-hole, and the tail portion of the bolt is connected with can be with the lower arm
The nut that body mutually reclines.When needing to adjust, bolt is unscrewed, adjusts the number of square washer, until upper arm body and lower arm body adjust
To desired location, then screwing bolts.
In a kind of above-mentioned length-adjustable crank connecting link, there is notch, the length of the notch on the square washer
Degree is greater than the outer diameter of bolt, and is less than the side length of the boss.It, can be by the opening pair of square washer when adjusting square washer number
Quasi- bolt passes through the bolt, is then sheathed on boss, it is not necessary that upper arm body, lower arm body and bolt are taken out, Ji Kejin
Row quickly adjustment.
In a kind of above-mentioned length-adjustable crank connecting link, the nut is hex bolts, is had on the lower arm body
The hexagon slot matched with the nut.After design has hexagon slot, nut can be limited, independent turn bolt is
It can.
Compared with prior art, the utility model has the advantage that
Upper arm body and lower arm body in the application opposite can slide, and spacing between the two be adjusted, to compensate holding
The mismachining tolerance of frame reduces installation difficulty when crank connecting link is connect with retainer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of this crank connecting link.
Fig. 2 is the scheme of installation of this crank connecting link.
Fig. 3 is the structural schematic diagram of this upper arm body.
In figure, 1, ontology；2, connecting hole；3, arch clamp arm；4, upper arm body；5, lower arm body；6, mounting hole；7, localization machine
Structure；8, groove；9, boss；10, square washer；11, bolt；12, nut；13, notch；14, hexagon slot；15, upper through-hole；
16, lower through-hole.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, Figure 2, Figure 3 shows, this crank connecting link includes ontology 1, and one end of ontology 1 offers connecting hole 2, ontology 1
The other end be connected with arch clamp arm 3, arch clamp arm 3 includes upper arm body 4 and lower arm body 5, the outer end of upper arm body 4 and lower arm body 5
Outer end offer the mounting hole 6 for connection retainer, the inner end of upper arm body 4 and the inner end of lower arm body 5 are slidably connected, make
To be preferred, the inner face of upper arm body 4 opens up fluted 8, and the inner face of lower arm body 5 has the boss that can be plugged in groove 8
9.The cross section of groove 8 and boss 9 is square.Square washer 10 is arranged on boss 9, square washer 10 can be with upper arm body
4 inner face mutually reclines.
As shown in Figure 1, Figure 2, Figure 3 shows, being provided between upper arm body 4 and lower arm body 5 can make the two relatively fixed and loosen
Positioning mechanism 7.In the present embodiment, upper arm body 4 offers the upper through-hole 15 being connected with groove 8, and lower arm body 5, which offers, to be run through
The lower through-hole 16 of boss 9, upper through-hole 15 and lower through-hole 16 are coaxially disposed, and positioning mechanism 7 includes sequentially passing through through-hole 15, groove
8 and lower through-hole 16 bolt 11, the tail portion of bolt 11 is connected with the nut 12 that can be reclined with 5 phase of lower arm body.Square washer 10
Upper to have notch 13, the length of notch 13 is greater than the outer diameter of bolt 11, and is less than the side length of boss 9.Preferably, nut 12 is
Hex bolts has the hexagon slot 14 matched with nut 12 on lower arm body 5.
The working principle of the utility model is as follows: this crank connecting link when in use, can first make at upper arm body 4 and lower arm body 5
In the state loosened, then retainer is placed in arch clamp arm 3, is adjusted between upper arm body 4, lower arm body 5 and retainer
Distance after, then keep upper arm body 4 and lower arm body 5 relatively fixed by positioning mechanism 7, then by retainer and upper arm body 4 and under
Arm body 5 is connected.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (7)
1. a kind of length-adjustable crank connecting link, the crank connecting link includes ontology (1), and one end of the ontology (1) offers
The other end of connecting hole (2), the ontology (1) is connected with arch clamp arm (3), which is characterized in that the arch clamp arm (3) includes
Upper arm body (4) and lower arm body (5), the outer end of the upper arm body (4) and the outer end of lower arm body (5) are offered to keep for connecting
The mounting hole (6) of frame, the inner end of the upper arm body (4) and the inner end of lower arm body (5) are slidably connected, and the upper arm body (4) and
The positioning mechanism (7) that can make that the two is relatively fixed and loosens is provided between lower arm body (5).
2. length-adjustable crank connecting link according to claim 1, which is characterized in that the inner face of the upper arm body (4)
It opens up fluted (8), the inner face of the lower arm body (5) has the boss (9) that can be plugged in the groove (8).
3. length-adjustable crank connecting link according to claim 2, which is characterized in that the groove (8) and boss (9)
Cross section is square.
4. length-adjustable crank connecting link according to claim 3, which is characterized in that the side of being arranged on the boss (9)
Shape washer (10), the square washer (10) can mutually recline with the inner face of the upper arm body (4).
5. length-adjustable crank connecting link according to claim 4, which is characterized in that the upper arm body (4) offer with
The upper through-hole (15) that the groove (8) is connected, the lower arm body (5) offer the lower through-hole (16) through the boss (9),
The upper through-hole (15) and lower through-hole (16) coaxial arrangement, the positioning mechanism (7) include sequentially passing through through-hole (15), groove
, (8) and the bolt (11) of lower through-hole (16) tail portion of the bolt (11) is connected with and can mutually recline with the lower arm body (5)
Nut (12).
6. length-adjustable crank connecting link according to claim 5, which is characterized in that have on the square washer (10)
Notch (13), the length of the notch (13) is greater than the outer diameter of bolt (11), and is less than the side length of the boss (9).
7. length-adjustable crank connecting link according to claim 6, which is characterized in that the nut (12) is hexagonal spiral shell
Bolt has the hexagon slot (14) matched with the nut (12) on the lower arm body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822096168.3U CN209194164U (en) | 2018-12-13 | 2018-12-13 | A kind of length-adjustable crank connecting link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822096168.3U CN209194164U (en) | 2018-12-13 | 2018-12-13 | A kind of length-adjustable crank connecting link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209194164U true CN209194164U (en) | 2019-08-02 |
Family
ID=67429028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822096168.3U Expired - Fee Related CN209194164U (en) | 2018-12-13 | 2018-12-13 | A kind of length-adjustable crank connecting link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209194164U (en) |
-
2018
- 2018-12-13 CN CN201822096168.3U patent/CN209194164U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190802 Termination date: 20211213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |