CN214083653U - Rotating shaft mounting structure and pencil advancing and retreating device of pencil sharpener thereof - Google Patents
Rotating shaft mounting structure and pencil advancing and retreating device of pencil sharpener thereof Download PDFInfo
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- CN214083653U CN214083653U CN202022484688.9U CN202022484688U CN214083653U CN 214083653 U CN214083653 U CN 214083653U CN 202022484688 U CN202022484688 U CN 202022484688U CN 214083653 U CN214083653 U CN 214083653U
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- rotating shaft
- helical gear
- mounting structure
- connecting piece
- pencil
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Abstract
The utility model discloses a pivot mounting structure, including having the first helical gear of axial perforation and wearing to establish the first pivot in this axial perforation, be provided with the structure of skidding between first pivot and the first helical gear, the structure of should skidding makes first pivot and first helical gear skid at both driven in-process. Through set up the structure of skidding between first pivot and first helical gear, the structure of should skidding makes first pivot and first helical gear can skid when cutting strength is greater than the design value at both driven in-processes, like this, can skid with first pivot when first helical gear rotates for the power that the pen advancing and retreating device was applied to the pencil can not infinitely increase, and the effort restriction between the nib of pencil and the cutting tool is below certain design value, and the pencil is difficult to the disconnected core. The utility model also discloses a be applied with like above-mentioned pivot mounting structure cut a ware the pen advance and retreat device, have the difficult advantage of disconnected core of pencil equally.
Description
Technical Field
The utility model relates to a cut a ware technical field, concretely relates to pivot mounting structure and a device that moves back is advanced to pen of cutting a ware thereof.
Background
The pencil sharpener is used for sharpening a pencil.
For example, the present applicant's chinese utility model patent application No. CN201720604107.6 (No. CN207140638U) discloses "a pen advancing and retracting device for a pen sharpener", which includes a base, a toothed disc, two parallel rotating shafts, and a friction wheel and a helical gear sleeved on the rotating shafts, wherein the toothed disc is disposed at the front side of the base, the toothed disc is provided with circumferentially distributed racks on the front surface of the toothed disc, the friction wheel is a rubber wheel formed by wrapping an injection-molded inner wheel with plastic, the helical gear is provided with helical teeth circumferentially and convexly engaged with the racks of the toothed disc on the outer peripheral surface of one end, and the end of the other end of the helical gear is formed with a tooth surface abutting against the friction wheel. By improving the material of the friction wheel, the friction wheel can not damage the surface of the pen after the pen is conveyed in place; the end part of the bevel gear is additionally provided with a tooth surface, so that the friction wheel is combined with the tooth surface, which is equivalent to a clutch process, so that the pen can move forward and backward stably and can play a role in protection when necessary; the structure is more reasonable, the hand feeling is more smooth, the pencil is not easy to rotate when being cut, the noise is low, and the service life is long. The pencil advancing and retreating device is improved, so that the advancing and retreating process of a pencil is smoother when the pencil is cut.
However, the above patent has the following problems: the middle part of the bevel gear is generally a square hole, and the part of the rotating shaft penetrating through the square hole is square, so that the transmission between the bevel gear and the rotating shaft is powerful, the acting force of the two friction wheels to the pencil advancing and retreating direction is large, and the acting force between the pencil point of the pencil and the cutting tool is large, so that the pencil is easy to break.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the first technical problem to provide a pivot mounting structure that the lead is difficult to disconnected core, simple structure to prior art's current situation.
The utility model aims to solve the second technical problem to provide a pencil advancing and retreating device of its sharpener to the current situation of prior art, enable the pencil to be difficult to disconnected core equally.
The utility model provides a technical scheme that above-mentioned first technical problem adopted does: the utility model provides a pivot mounting structure, includes the first helical gear that has the axial perforation and wears to establish the first pivot in this axial perforation, its characterized in that: and a slipping structure is arranged between the first rotating shaft and the first helical gear, and the slipping structure enables the first rotating shaft and the first helical gear to slip in the transmission process of the first rotating shaft and the first helical gear.
As a modification, the slipping structure includes a link provided between the first rotating shaft and the first helical gear, the link extending in the axial direction of the first rotating shaft, a fixed end of the link being connected to one of the first rotating shaft and the first helical gear, and a free end of the link radially abutting against a peripheral wall of the other of the first rotating shaft and the first helical gear.
Further, at least the free end of the connecting member has elasticity, so that the free end has a tendency to be in close contact with the other one of the first rotating shaft and the first helical gear in the radial direction;
or/and the connecting piece gradually inclines towards the other one of the first rotating shaft and the first bevel gear from the fixed end to the free end.
Further, the free end of the connecting piece has a contact portion for radially abutting against a peripheral wall of the other of the first rotating shaft and the first helical gear.
Still further, the contact part is in the shape of a convex point with an arc-shaped outer wall.
Furthermore, the axial through hole is a circular hole, the part of the first rotating shaft penetrating in the axial through hole is a cylindrical section with the outer diameter matched with the aperture of the circular hole, and the cylindrical section can circumferentially rotate relative to the first bevel gear along the axis of the cylindrical section in the axial through hole;
the connecting pieces are arranged in a plurality of circumferential intervals, all the connecting pieces are distributed at intervals around the first rotating shaft, the fixed ends of the connecting pieces are connected with the hole wall openings of the axial through holes of the first bevel gears, the free ends of the connecting pieces extend towards one side far away from the axial through holes, and the free ends of the connecting pieces are radially abutted against the circumferential wall of the first rotating shaft, so that the transmission between the first bevel gears and the first rotating shaft is realized through the friction between the free ends of the connecting pieces and the circumferential wall of the first rotating shaft.
Further, the connecting piece and the first bevel gear are integrated.
Further, the cross section of the part of the first rotating shaft, which is abutted to the connecting piece, is approximately polygonal, and the edge of the polygon is used for rubbing the corresponding connecting piece.
Furthermore, the corners of the polygon are in an arc shape protruding outwards.
Preferably, the polygon is approximately square, the periphery of each square corner is in a convex arc shape, the connecting pieces are provided with a plurality of connecting pieces which are distributed at intervals along the circumferential direction of the first rotating shaft, and the free ends of the connecting pieces are all in radial butt joint with the circumferential wall of the first rotating shaft, so that the transmission between the first bevel gear and the first rotating shaft is realized through the friction between the free ends of the connecting pieces and the circumferential wall of the first rotating shaft.
The utility model provides a technical scheme that above-mentioned second technical problem adopted does: the utility model provides an it advances and retreats device to be applied to like above-mentioned pivot mounting structure cut a ware which characterized in that: including base, the fluted disc of setting on the base, first helical gear and fluted disc meshing transmission among the pivot mounting structure, first pivot setting is on the base, still is provided with the second pivot parallel with first pivot on the base, this second pivot overcoat be equipped with the second helical gear of second pivot adaptation, second helical gear and fluted disc meshing transmission.
Further, the sliding structure is not arranged between the second rotating shaft and the second bevel gear.
Finally, the section of at least partial region of the second rotating shaft is polygonal, the middle part of the second bevel gear is provided with a polygonal through hole for the partial region of the second rotating shaft to pass through, and the size of the polygonal through hole is matched with the size of the partial region of the second rotating shaft.
Compared with the prior art, the utility model has the advantages that: through set up the structure of skidding between first pivot and first helical gear, the structure of should skidding makes first pivot and first helical gear can skid when cutting strength is greater than the design value at both driven in-processes, like this, can skid with first pivot when first helical gear rotates for the power that the pen advancing and retreating device was applied to the pencil can not infinitely increase, and the effort restriction between the nib of pencil and the cutting tool is below certain design value, and the pencil is difficult to the disconnected core.
The pencil advancing and retreating device of the pencil sharpener with the rotating shaft mounting structure also has the advantage that the core of the pencil is not easy to break.
Drawings
Fig. 1 is a schematic perspective view of a pen advancing and retreating device to which a rotating shaft mounting structure according to an embodiment of the present invention is applied;
fig. 2 is a schematic perspective view of a first helical gear according to an embodiment of the present invention;
FIG. 3 is a schematic view from another angle of FIG. 2;
fig. 4 is a schematic perspective view of the first rotating shaft in the embodiment of the present invention;
FIG. 5 is a schematic view from another angle of FIG. 4;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 7 is a cross-sectional view taken along the direction B-B in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Referring to fig. 1, 6 and 7, a preferred embodiment of the pen advancing and retreating device with a pivot mounting structure according to the present invention is shown.
The pencil advancing and retreating device of the pencil sharpener comprises a rotating shaft mounting structure, a base 100, a fluted disc 200 arranged on the base 100, a second rotating shaft 300, a second bevel gear 400 and the like.
Referring to fig. 2 to 5, the rotating shaft mounting structure includes a first helical gear 2 having an axial through hole 21 and a first rotating shaft 1 inserted into the axial through hole 21, the axial through hole 21 may be a circular hole, a portion of the first rotating shaft 1 inserted into the axial through hole 21 is a cylindrical section 12 having an outer diameter matched with the diameter of the circular hole, the cylindrical section 12 can rotate circumferentially in the axial through hole 21 along its own axis relative to the first helical gear 2, and a slip structure is disposed between the first rotating shaft 1 and the first helical gear 2, and the slip structure enables the first rotating shaft 1 and the first helical gear 2 to slip during transmission of the two. The first rotating shaft 1 is arranged on the base 100, and the first bevel gear 2 and the second bevel gear 400 are respectively in meshing transmission with the gear disc 200. The second shaft 300 is disposed on the base 100 and parallel to the first shaft 1, the second bevel gear 400 adapted to the second shaft 300 is sleeved on the second shaft 300, the first shaft 1 is disposed with a first friction wheel 4, and the second shaft 300 is disposed with a second friction wheel 500.
Specifically, the slipping structure includes a connecting member 3 disposed between the first rotating shaft 1 and the first helical gear 2, the connecting member 3 extending axially along the first rotating shaft 1, a fixed end of the connecting member 3 being connected to the first helical gear 2, and a free end of the connecting member 3 radially abutting against the circumferential wall of the first rotating shaft 1. In order to facilitate the molding and manufacturing and reduce the assembly process, the connecting member 3 and the first helical gear 2 are an integral piece. In other embodiments, it is also possible that the fixed end of the connecting element 3 is connected to the first shaft 1 and the free end abuts against the axial through hole 21 of the first bevel gear 2.
The connecting piece 3 has elasticity, so that the free end has a tendency of tightly abutting against the first rotating shaft 1 in the radial direction, and the connecting piece 3 gradually inclines towards the first rotating shaft 1 from the fixed end to the free end, so that the connecting piece 3 is tightly abutted against the outer wall of the first rotating shaft 1. In other embodiments it is also possible that only the free end of the connecting element 3 is resilient.
The free end of the connecting piece 3 has a contact portion 31, which contact portion 31 is intended to radially abut against the outer wall of the first rotation shaft 1. Preferably, the contact portion 31 is shaped like a convex dot whose outer wall is curved. The contact portion 31 may have another shape with a smooth surface, for example, the outer wall of the contact portion 31 may be a curved surface.
The connecting pieces 3 are 4, all the connecting pieces 3 are circumferentially distributed at intervals by taking the first rotating shaft 1 as a center, the fixed end of each connecting piece 3 is connected with the hole wall opening of the axial through hole 21 of the first bevel gear 2, the free end of each connecting piece extends towards one side far away from the axial through hole 21, and the free end of each connecting piece 3 is radially abutted against the peripheral wall of the first rotating shaft 1, so that the transmission between the first bevel gear 2 and the first rotating shaft 1 is realized through the friction between the free end of each connecting piece 3 and the peripheral wall of the first rotating shaft 1. In other embodiments, the number of the connecting members 3 can be adjusted according to requirements, for example, 3 or 5 connecting members are provided.
The cross section of the portion of the first shaft 1 abutting the connecting element 3 is substantially polygonal, the edges of the polygon being intended to rub against the corresponding connecting element 3, the corners 11 of the polygon being convexly curved. In this embodiment, the polygon is substantially square, the peripheries of the square 4 corners 11 are in a convex arc shape, the 4 connecting pieces 3 are circumferentially distributed at intervals along the first rotating shaft 1, and the free ends of the 4 connecting pieces are radially abutted to the circumferential wall of the first rotating shaft 1, so that the transmission between the first helical gear 2 and the first rotating shaft 1 is realized through the friction between the free ends of the connecting pieces 3 and the circumferential wall of the first rotating shaft 1. In other embodiments, the polygon may be a pentagon, a hexagon, or the like.
In this embodiment, the above-mentioned slipping structure is arranged between the first rotating shaft 1 and the first helical gear 2, and the above-mentioned slipping structure is not arranged between the second rotating shaft 300 and the second helical gear 400, that is, only one of the two rotating shafts is arranged between the corresponding helical gear, so that the transmission between the second rotating shaft 300 and the second helical gear 400 does not slip. In other embodiments, a sliding structure may also be provided between the second rotating shaft 300 and the second helical gear 400, that is, a sliding structure is provided between the two rotating shafts and the corresponding helical gears, so that the acting force of the whole pencil sharpener on the pencil lead is small, and the pencil lead is less prone to being broken.
In this embodiment, a cross section of a partial region of the second rotating shaft 300 is polygonal, the middle portion of the second helical gear 400 has a polygonal through hole 401 for the partial region of the second rotating shaft 300 to pass through, the size of the polygonal through hole 401 is matched with the size of the partial region of the second rotating shaft 300, so that the transmission between the second rotating shaft 300 and the second helical gear 400 does not slip circumferentially, the polygon may be square, and correspondingly, the polygonal through hole 401 is a square through hole. In other embodiments, the polygon may take other shapes, such as a pentagon or a hexagon, and the second shaft 300 and the second helical gear 400 may be prevented from rotating circumferentially by a rib and groove fit.
The working principle and the using process of the pencil advancing and retreating device of the pencil sharpener of the embodiment are as follows.
After the sharpener is started, the fluted disc 200 starts to rotate, the first helical gear 2 and the second helical gear 400 which are respectively meshed with the fluted disc 200 are driven to rotate, the second helical gear 400 drives the second rotating shaft 300 to rotate, and the second rotating shaft 300 drives the second friction wheel 500 to rotate, so that the transmission between the second helical gear 400 and the second rotating shaft 300 is relatively stable because no slipping structure is arranged between the second rotating shaft 300 and the second helical gear 400. Simultaneously first helical gear 2 drives first pivot 1 and rotates, first pivot 1 drives first friction pulley 4 and rotates, because be provided with the structure of skidding between first helical gear 2 and the first pivot 1, friction drive between the contact site 31 of connecting piece 3 and the first pivot 1 for skid between first helical gear 2 when rotating and the first pivot 1, the rotational speed of first pivot 1 is less like this, and make the rotational speed of first friction pulley 4 less, the power of exerting on the pencil can reduce like this, the effort restriction between the nib of pencil and the cutting tool is below certain design value, the pencil is difficult to the disconnected core.
Because the transmission between the second bevel gear 400 and the second rotating shaft 300 is stable, the second friction wheel 500 of the pencil sharpener has a large friction force on the pencil, which is not only beneficial for the old pencil (the pencil end is approximately conical) to enter the pencil, but also beneficial for the brand-new pencil (the pencil end is blunt without being cut), and the phenomenon of the pencil entering to be stuck is not easy to occur.
Claims (13)
1. A rotating shaft mounting structure includes a first helical gear (2) having an axial through hole (21) and a first rotating shaft (1) inserted in the axial through hole (21), characterized in that: a slipping structure is arranged between the first rotating shaft (1) and the first helical gear (2), and the slipping structure enables the first rotating shaft (1) and the first helical gear (2) to slip in the transmission process of the first rotating shaft and the first helical gear.
2. The spindle mounting structure according to claim 1, wherein: the slipping structure comprises a connecting piece (3) arranged between the first rotating shaft (1) and the first helical gear (2), the connecting piece (3) extends along the axial direction of the first rotating shaft (1), the fixed end of the connecting piece (3) is connected with one of the first rotating shaft (1) and the first helical gear (2), and the free end of the connecting piece (3) is radially abutted against the peripheral wall of the other one of the first rotating shaft (1) and the first helical gear (2).
3. The spindle mounting structure according to claim 2, wherein: the connecting piece (3) has elasticity at least at the free end, and the free end has the tendency of tightly abutting with the other one of the first rotating shaft (1) and the first helical gear (2) in the radial direction;
or/and the connecting piece (3) is gradually inclined towards the other one of the first rotating shaft (1) and the first bevel gear (2) from the fixed end to the free end.
4. The spindle mounting structure according to claim 2, wherein: the free end of the connecting piece (3) is provided with a contact part (31), and the contact part (31) is used for radially abutting against the peripheral wall of the other one of the first rotating shaft (1) and the first bevel gear (2).
5. The spindle mounting structure according to claim 4, wherein: the contact part (31) is in a convex point shape with an arc-shaped outer wall.
6. The spindle mounting structure according to claim 2, wherein: the axial through hole (21) is a circular hole, the part of the first rotating shaft (1) penetrating through the axial through hole (21) is a cylindrical section (12) with the outer diameter matched with the aperture of the circular hole, and the cylindrical section (12) can rotate circumferentially relative to the first helical gear (2) along the axis of the cylindrical section in the axial through hole (21);
the connecting pieces (3) are provided with a plurality of connecting pieces, all the connecting pieces (3) are circumferentially distributed at intervals by taking the first rotating shaft (1) as a center, the fixed end of each connecting piece (3) is connected with the hole wall opening of the axial through hole (21) of the first helical gear (2), the free end of each connecting piece extends towards one side far away from the axial through hole (21), and the free end of each connecting piece (3) is radially abutted against the peripheral wall of the first rotating shaft (1), so that the transmission between the first helical gear (2) and the first rotating shaft (1) is realized by the friction between the free end of each connecting piece (3) and the peripheral wall of the first rotating shaft (1).
7. The spindle mounting structure according to claim 2, wherein: the connecting piece (3) and the first bevel gear (2) are integrated.
8. The spindle mounting structure according to claim 2, wherein: the cross section of the part of the first rotating shaft (1) abutted to the connecting piece (3) is approximately polygonal, and the edge of the polygon is used for rubbing with the corresponding connecting piece (3).
9. The spindle mounting structure according to claim 8, wherein: the corners (11) of the polygon are in an arc shape which is convex outwards.
10. The spindle mounting structure according to claim 8, wherein: the polygon is roughly square, the peripheries of 4 square corners (11) are in an outward convex arc shape, the connecting pieces (3) are 4, the 4 connecting pieces (3) are distributed at intervals along the circumferential direction of the first rotating shaft (1), and the free ends of the 4 connecting pieces are radially abutted to the circumferential wall of the first rotating shaft (1), so that the transmission between the first helical gear (2) and the first rotating shaft (1) is realized through the friction between the free ends of the connecting pieces (3) and the circumferential wall of the first rotating shaft (1).
11. A pencil advancing and retracting device of a pencil sharpener using the rotating shaft mounting structure as defined in any one of claims 1 to 10, characterized in that: including base (100), set up fluted disc (200) on base (100), first helical gear (2) among the pivot mounting structure and fluted disc (200) meshing transmission, first pivot (1) set up on base (100), still be provided with second pivot (300) parallel with first pivot (1) on base (100), this second pivot (300) overcoat is equipped with second helical gear (400) with second pivot (300) adaptation, second helical gear (400) and fluted disc (200) meshing transmission.
12. The pencil advancing and retracting device of the pencil sharpener of claim 11, wherein: the sliding structure is not arranged between the second rotating shaft (300) and the second bevel gear (400).
13. The pencil advancing and retracting device of the pencil sharpener of claim 11, wherein: the cross section of at least partial region of the second rotating shaft (300) is polygonal, the middle part of the second bevel gear (400) is provided with a polygonal through hole (401) for the partial region of the second rotating shaft (300) to pass through, and the size of the polygonal through hole (401) is matched with the size of the partial region of the second rotating shaft (300).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022484688.9U CN214083653U (en) | 2020-10-31 | 2020-10-31 | Rotating shaft mounting structure and pencil advancing and retreating device of pencil sharpener thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022484688.9U CN214083653U (en) | 2020-10-31 | 2020-10-31 | Rotating shaft mounting structure and pencil advancing and retreating device of pencil sharpener thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214083653U true CN214083653U (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022484688.9U Active CN214083653U (en) | 2020-10-31 | 2020-10-31 | Rotating shaft mounting structure and pencil advancing and retreating device of pencil sharpener thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214083653U (en) |
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2020
- 2020-10-31 CN CN202022484688.9U patent/CN214083653U/en active Active
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