CN211550169U - Improved semicircular key - Google Patents
Improved semicircular key Download PDFInfo
- Publication number
- CN211550169U CN211550169U CN201922347670.1U CN201922347670U CN211550169U CN 211550169 U CN211550169 U CN 211550169U CN 201922347670 U CN201922347670 U CN 201922347670U CN 211550169 U CN211550169 U CN 211550169U
- Authority
- CN
- China
- Prior art keywords
- key
- key body
- keyway
- improved
- arch
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a modified semicircle key, including the key body, the both sides wall that the key body is gone up parallel just is close to the fixed toper arch that is provided with in arc surface bottom. The utility model discloses in, two parallel distribution's of key body lateral wall and be close to nearly arc surface rigidity and be provided with conical arch, the keyway of arch and supporting installation is interference fit, and two parallel distribution's of key body lateral wall and keyway lateral wall are transition fit, can fix a position the key body in the keyway through setting up the arch, prevent that the key body from droing.
Description
Technical Field
The utility model relates to a key-type connection technical field especially relates to a modified semicircle key.
Background
The semicircular key is a driving part of the key, the upper surface of the key is a plane, the lower surface of the key is a semicircular arc surface, and the two side surfaces of the key are parallel, and the key is commonly called as a crescent key.
At present, when a common semi-circular key supplied in the market is assembled with a key groove, the requirement that the semi-circular key is not easy to fall off during installation and the shaft diameter is not changed is not easily met, and due to the fact that the width of the key groove and the thickness of the semi-circular key have tolerance sizes, if a good fastening press fit is obtained in the assembling process, the semi-circular key needs to be selected and matched, and the operation efficiency is influenced. The oversized interference fit press fitting causes the shaft diameter of the key slot position to expand, and assembly is affected. If the clearance fit is formed, the impact abrasion of the semicircular key is aggravated, and the detachable semicircular key is easy to fall off and lose during maintenance.
Accordingly, the present invention provides an improved woodruff key.
Disclosure of Invention
The utility model aims to provide a: the improved semicircular key is provided for solving the problems that the existing standard semicircular key and the existing key groove are easy to be fixed and not firmly fall off after being butted and the shaft diameter is expanded after transition fit.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an improved semicircular key, includes the key body, the both sides wall that the key body is gone up parallel just is close to the fixed toper arch that is provided with in arc surface bottom.
As a further description of the above technical solution:
the number of the protrusions is at least one.
As a further description of the above technical solution:
the die drawing angle of the protrusion is 1-3 degrees.
As a further description of the above technical solution:
the die drawing angle of the protrusion is 2 degrees.
As a further description of the above technical solution:
the top of the protrusion is spherical.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses in, two parallel distribution's of key body lateral wall and be close to nearly arc surface rigidity and be provided with conical arch, the keyway of arch and supporting installation is interference fit, and two parallel distribution's of key body lateral wall and keyway lateral wall are transition fit, can fix a position the key body in the keyway through setting up the arch, prevent that the key body from droing.
2. In the utility model, the convex top with the convex pattern drawing angle of 1-3 degrees is a spherical surface, thereby being convenient for the installation during the manufacture and the use.
3. The utility model discloses in, bellied quantity is one at least. When selecting for use less arch, can not lead to the shaft diameter of keyway position to produce the inflation and influence follow-up assembly.
Drawings
Fig. 1 shows a schematic structural diagram of a key body provided according to an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a left side view of the key body provided in the embodiment of the present invention.
Illustration of the drawings:
1. a key body; 11. and (4) protruding.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a modified semicircular key, includes key body 1, the both sides wall of parallel on the key body 1 just is close to the fixed toper arch 11 that is provided with in arc surface bottom, protruding 11 the tip outwards, protruding technological realization through mould cold-heading or powder suppression, the material hardness of semicircular key is a little higher than by the material hardness of installation axle, the boss thickness dimension of semicircular key is greater than keyway width size, protruding 11 cards firmly fix in the keyway can not drop in the key groove after key body 1 that makes in the keyway and the keyway interference are joined in marriage in addition.
Specifically, as shown in fig. 1, the number of the protrusions 11 is at least one, after the key body 1 is installed in a key slot on a shaft, the protrusions 11 are completely immersed in the key slot, when one protrusion 11 is selected, the stress points of the key slot are few, and further the shaft diameter at the position of the key slot is not expanded to influence the assembly of a subsequent shaft and an external part,
specifically, as shown in fig. 2, the die drawing angle of the protrusion 11 is 1 to 3 °, the inclination angle facilitates the cold heading processing of the die, and the die drawing angle is 2 °, so that the forming and the demolding after the forming are easy.
Specifically, as shown in fig. 2, the top of the protrusion 11 is a spherical surface, and when the key body 1 and the external key groove are installed, the spherical structure has a guiding effect, so that scratches on the transmission surface of the key groove are reduced.
The working principle is as follows: during the use, use two work lateral walls transition fit of keyway of key body 1 and supporting installation of standard component structure, the protruding 11 and the keyway interference fit of its both sides, use outside pressure equipment instrument to impress key body 1 keyway, protruding 11 sphere is pressing the keyway lateral wall and is slided in to be the jamming connected state, be difficult to drop, protruding 11 only can produce local fixed point extrusion to the keyway inside wall, can not lead to the axle diameter of keyway position to produce the inflation and influence follow-up assembly.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. The utility model provides an improved semicircular key, includes key body (1), its characterized in that, the both sides wall that is parallel on key body (1) just is close to the fixed toper arch (11) that are provided with in arc surface bottom.
2. An improved woodruff key according to claim 1, characterised in that the number of said protrusions (11) is at least one.
3. An improved woodruff key according to claim 1, characterised in that the draft angle of the protrusions (11) is 1-3 °.
4. An improved woodruff key according to claim 3, characterised in that the draft angle of the protrusions (11) is 2 °.
5. An improved woodruff key according to claim 1, characterised in that the top of the protrusions (11) is spherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922347670.1U CN211550169U (en) | 2019-12-24 | 2019-12-24 | Improved semicircular key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922347670.1U CN211550169U (en) | 2019-12-24 | 2019-12-24 | Improved semicircular key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211550169U true CN211550169U (en) | 2020-09-22 |
Family
ID=72508943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922347670.1U Active CN211550169U (en) | 2019-12-24 | 2019-12-24 | Improved semicircular key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211550169U (en) |
-
2019
- 2019-12-24 CN CN201922347670.1U patent/CN211550169U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104850188B (en) | Metal center and its manufacturing method, hand-held terminal device and its manufacturing method | |
| CN201120433Y (en) | Blanking-remedying recombined fine blanking die | |
| CN211550169U (en) | Improved semicircular key | |
| CN207138632U (en) | A kind of aluminium alloy extrusions processing blanking die | |
| CN203804036U (en) | Blanking trimming die for car body covering part | |
| CN206416458U (en) | Toilet seat mould | |
| CN205217899U (en) | Support forging jumping -up mould structure | |
| CN201136035Y (en) | Ring-patterned credit cards at shank of blind rivet | |
| CN203919809U (en) | A kind of permanent magnetic ferrite magnetic shoe mould | |
| CN205393311U (en) | Bending die | |
| CN207735451U (en) | A kind of stainless steel cupboard plates depth U-shaped bending tool | |
| CN206882511U (en) | Wide-angle cold-rolled forming section shearing die | |
| CN206936173U (en) | A kind of fine blanking die structure of brake back plate suspension mold insert | |
| CN201991957U (en) | Universal joint crossing shaft | |
| CN206134571U (en) | Mistake proofing button structure | |
| CN205551390U (en) | High accuracy casting mould | |
| CN212884500U (en) | Twisting device suitable for small plane forming | |
| CN104421279A (en) | Conical positioning pin | |
| CN205173186U (en) | Sealed self -locking nut | |
| CN214321660U (en) | Double-lug connector die structure | |
| CN208866252U (en) | A kind of anti-stick material punching press punch-pin | |
| CN206109188U (en) | Detachable components of a whole that can function independently glass mold | |
| CN101837426B (en) | Continuous punching blank forming method for chain roller of chain | |
| CN213704661U (en) | Mold insert and mold for front defrosting panel with appearance dermatoglyph by using same | |
| CN207839168U (en) | Sand making machine stock guide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |