CN214606830U - Worm gear and worm transmission type automatic pen feeding mechanism - Google Patents

Abstract

The utility model relates to a pencil sharpener technical field discloses an automatic pen feeding mechanism of worm gear transmission type, including: a mounting seat; the first clamping assembly and the second clamping assembly are arranged on the mounting seat; a gap for the pencil to penetrate through is formed between the first clamping assembly and the second clamping assembly, and the size of the gap is adjustable; the first clamping assembly and the second clamping assembly comprise worm gears; the driving device is arranged on the mounting seat and comprises a transmission piece and a driving piece for driving the transmission piece; the transmission part is provided with a worm which is in meshed transmission with the worm wheel. The utility model has the advantages of, this automatic advance a mechanism transmission precision is high, small in noise, and can be applicable to the pencil of different diameters size, and the pencil centre gripping is reliable.

Description

Worm gear and worm transmission type automatic pen feeding mechanism

Technical Field

The utility model relates to a pencil sharpener technical field especially relates to an automatic pen feeding mechanism of worm gear transmission type.

Background

The distance between two clamping components of the automatic pencil feeding mechanism of the existing pencil sharpener is mostly fixed, and the distance cannot be adjusted, so that one pencil sharpener can only be suitable for a pencil with a fixed diameter; a small part of the pencil holder can be adapted to pencils with different diameters, but the diameter range of the pencil holder is limited, the working noise is large, and the blocking feeling is obvious; and because gear drive is generally adopted, when the large-diameter pencil extrudes two clamping components to displace, the transmission between the driving part and the clamping components is easily influenced, so that the structural stability is poor, and the using effect is not good.

For example, patent "CN 212242774U" discloses a pencil feeding mechanism of a pencil sharpener, which comprises: the mounting seat is provided with mounting grooves on two sides and a mounting hole in the middle; the transmission assembly comprises a rotary table, a first gear shaft and a second gear shaft; the first gear shaft and the second gear shaft are oppositely arranged in the mounting groove and both comprise a rotating shaft and a bevel gear connected to one end of the rotating shaft; the turntable is arranged in the mounting hole and is positioned below the first gear shaft and the second gear shaft, and the turntable is provided with a bevel block for driving the bevel gear; the clamping piece is sleeved at the other end of each of the two rotating shafts, and a gap exists between the clamping piece and the inclined block. The distance between the first gear shaft and the second gear shaft of the pencil feeding mechanism is not adjustable, the diameter range of the pencil which can be sharpened is limited, and the use range of the pencil sharpener is limited.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art exists, the utility model aims to solve the technical problem that a worm gear transmission formula, transmission are reliable, small in noise is proposed, and the automatic pen mechanism that advances of the pencil of adaptable different diameters size.

The utility model provides a technical scheme that its technical problem adopted is, provides an automatic pen mechanism that advances of worm gear transmission formula, including:

a mounting seat;

the first clamping assembly and the second clamping assembly are arranged on the mounting seat; a gap for a pencil to penetrate through is formed between the first clamping assembly and the second clamping assembly, and the size of the gap is adjustable; the first clamping assembly and the second clamping assembly comprise worm gears;

the driving device is arranged on the mounting seat and comprises a transmission piece and a driving piece for driving the transmission piece; the transmission part is provided with a worm, and the worm is in meshing transmission with the worm wheel.

Furthermore, the transmission part comprises a first transmission part and a second transmission part which are driven by the driving part synchronously;

the worm on the first transmission piece is in meshing transmission with the worm wheel of the first clamping assembly, and the worm on the second transmission piece is in meshing transmission with the worm wheel of the second clamping assembly.

Furthermore, a plurality of driving teeth are protruded on the driving piece, a driving fluted disc is arranged at the bottom of the driving piece, and the worm is arranged on the driving fluted disc; and the transmission fluted disc is in meshing transmission with the driving teeth.

Further, the driving teeth are arranged to be convex columns, and the diameters of the convex columns are gradually increased from top to bottom.

Further, the device also comprises a cover body which is detachably arranged on the mounting seat; one end of the transmission piece is rotatably arranged on the mounting seat, and the other end of the transmission piece is rotatably arranged on the cover body.

Furthermore, the first clamping assembly and the second clamping assembly are arranged in a central rotation symmetry manner;

the both sides of mount pad are equipped with a opening bar groove up respectively, the one end slidable of first centre gripping subassembly sets up wherein one in the bar groove, the one end slidable of second centre gripping subassembly sets up another in the bar groove.

Furthermore, two sides of the mounting seat are respectively provided with a U-shaped groove with an upward opening, the other end of the first clamping component is rotatably arranged in one of the U-shaped grooves, and the other end of the second clamping component is rotatably arranged in the other U-shaped groove.

Furthermore, a sliding block is sleeved on each of the first clamping assembly and the second clamping assembly, and a return spring is arranged between each sliding block and the corresponding mounting seat;

the mounting seat is provided with a sliding groove, and the sliding block is slidably arranged in the sliding groove.

Furthermore, a guide plate extends downwards from the sliding block, the guide plate is arranged in the sliding groove in a penetrating mode, a limiting block is arranged on the side face of the guide plate, and the limiting block is attached to the bottom of the mounting seat.

Further, the device also comprises two tension springs; the clamping device is connected to two ends of the first clamping assembly and the second clamping assembly respectively;

and connecting rings are arranged at two ends of the tensioning spring, annular grooves are arranged at two ends of the first clamping assembly and two ends of the second clamping assembly, and the connecting rings are arranged in the annular grooves.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

in the utility model, the driving teeth on the driving piece are meshed with the driving toothed disc of the driving piece for transmission, so as to drive the worm to rotate, the worm drives the worm wheel to rotate, namely the driving piece synchronously drives the first clamping component and the second clamping component to advance and retreat the pen, which is equivalent to advance and retreat the pen after primary speed reduction, and the worm wheel and the worm are equivalent to stepless speed change and drive the clamping wheel to rotate; the pen is smooth in advancing and retreating, free of jamming and pause and low in noise. The two sides of the mounting seat of the automatic pencil feeding mechanism are provided with strip-shaped grooves, one end of the first clamping assembly and one end of the second clamping assembly are slidably arranged in the strip-shaped grooves, the size of a gap between the first clamping assembly and the second clamping assembly can be adjusted to adapt to pencils with different diameters, the first clamping assembly and the second clamping assembly are arranged in central rotational symmetry, both the first clamping assembly and the second clamping assembly can slide on one side, and one end of each clamping assembly can slide on one side, namely, one end of each clamping assembly can rotate around one end which does not slide, the requirement on the meshing precision of a worm wheel is generally high, and the end part close to the worm wheel side in the scheme is nonslip, so that the meshing precision can be effectively guaranteed, the transmission precision is guaranteed, the transmission structure cannot fail, and the stability is high; meanwhile, the pen can be further ensured to be smoothly advanced and retreated, no jamming or pause and low noise is caused.

In the utility model, a scheme is that the sliding blocks are sleeved at the sliding end of the first clamping assembly and the sliding end of the second clamping assembly, and the guide plates on the two sliding blocks are matched with the sliding grooves on the mounting seat, so that the first clamping assembly and the second clamping assembly can slide reliably, and the sliding blocks can be effectively prevented from being separated from the mounting seat by the limiting blocks on the side surfaces of the guide plates; the reset spring can ensure that the pencil is clamped tightly, and can ensure that the two sliding blocks are driven to reset after the pencil is withdrawn, so that the first clamping assembly and the second clamping assembly are driven to reset. According to the other scheme, two tensioning springs (totally two) are respectively connected to two ends of the first clamping assembly and the second clamping assembly, so that the stress balance and the pen clamping reliability are guaranteed, the integral structure of the automatic pen feeding mechanism can be simplified, the using quantity of the tensioning springs is reduced, and the manufacturing cost is reduced.

Drawings

Fig. 1 is a schematic overall structure diagram (with a pencil fitted) of the automatic pencil feeding mechanism according to the first embodiment;

FIG. 2 is a schematic structural view of FIG. 1 with the cover removed;

FIG. 3 is a schematic structural view of FIG. 2 with the mounting base removed;

FIG. 4 is an exploded view of FIG. 1 (with the pencil removed);

FIG. 5 is a schematic view showing the entire structure of the automatic pencil feeding mechanism according to the second embodiment (with a pencil attached);

FIG. 6 is a schematic view of the structure of FIG. 5 with the cover removed;

FIG. 7 is a schematic view of the structure of FIG. 6 with the mounting base removed;

fig. 8 is an exploded view of fig. 5 (pencil removed).

In the figure, the position of the upper end of the main shaft,

1. a mounting seat; 10. a strip-shaped hole; 12. a chute; 18. a U-shaped groove;

2. a first clamping assembly; 20. a worm gear; 21. an annular groove; 22. a wheel axle; 23. a clamping wheel;

3. a second clamping assembly;

4. a drive device; 40. a drive member; 401. a drive tooth; 41. a transmission member; 410. a worm; 411. a first transmission member; 412. a second transmission member; 413. a transmission fluted disc;

5. a slider; 50. a guide plate; 501. a limiting block; 560. a return spring;

6. a cover body;

7. tensioning the spring; 70. and (7) connecting rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The utility model discloses in the automatic pen mechanism of advancing of scheme mainly used full-automatic electronic pencil sharpener, it has the automatic pen of advancing and moves back a function.

The first embodiment is as follows:

as shown in fig. 1-4, a worm gear transmission type automatic pen feeding mechanism comprises: a mounting base 1; one side of the mounting seat 1 is provided with a strip-shaped groove 10, and the other side of the mounting seat is also provided with a strip-shaped groove 10; the strip-shaped grooves 10 on the two sides are arranged in a staggered manner, namely not in opposite positions; the openings of the strip-shaped grooves 10 face upwards, so that the first clamping assembly 2 and the second clamping assembly 3 are convenient to mount; the strip-shaped groove 10 is in a strip shape, so that one end of the first clamping component 2 and one end of the second clamping component 3 can slide along the strip-shaped groove; the first clamping assembly 2 and the second clamping assembly 3 are arranged on the mounting base 1; a gap 230 for pencils to penetrate is formed between the first clamping assembly 2 and the second clamping assembly 3, and the size of the gap 230 is adjustable so as to adapt to pencils with different diameters; the first clamping component 2 and the second clamping component 3 both comprise worm wheels 20; the driving device 4 is arranged on the mounting seat 1 and comprises a transmission piece 41 and a driving piece 40 for driving the transmission piece 41; the transmission member 41 is provided with a worm 410, and the worm 410 is in meshing transmission with the worm wheel 20.

Preferably, the transmission member 41 includes both the first transmission member 411 and the second transmission member 412, and both are driven by the driving member 40 synchronously; the driving part 40 can synchronously drive the first clamping component 2 and the second clamping component 3 to synchronously rotate so as to advance and retreat pens. The worm 410 on the first transmission piece 411 is in meshing transmission with the worm wheel 20 of the first clamping assembly 2, and the worm 410 on the second transmission piece 412 is in meshing transmission with the worm wheel 20 of the second clamping assembly 3.

Preferably, a plurality of driving teeth 401 protrude from the driving member 40, a driving toothed disc 413 is disposed at the bottom of the driving member 41, and the worm 410 is disposed on the driving toothed disc 413, and both are integrally formed; the transmission fluted disc 413 is in meshing transmission with the driving teeth 401. The driving teeth 401 are arranged as convex columns, and the diameters of the convex columns are gradually increased from top to bottom, so that the structural strength of the convex columns is ensured, the smooth meshing of the driving fluted disc 413 and the convex columns is facilitated, and no clamping stagnation is caused; the automatic pen feeding mechanism further comprises a cover body 6 which is detachably arranged on the mounting base 1; driving medium 41 one end rotationally sets up on the mount pad 1, the other end rotationally sets up on the lid 6, specifically, all seted up the round hole on mount pad 1 and the lid 6, supply the both ends installation of driving medium 41 respectively, guarantee its rotation accuracy.

In the actual use process, the driving teeth 401 on the driving member 40 are meshed with the driving toothed disc 413 of the driving member 41 for transmission, so as to drive the worm 410 to rotate, the worm 410 drives the worm wheel 20 to rotate, that is, the driving member 40 synchronously drives the first clamping assembly 2 and the second clamping assembly 3 to advance and retreat pens, which is equivalent to advance and retreat pens after primary speed reduction, and the worm wheel 20 and the worm 410 are equivalent to stepless speed change and drive the clamping wheel 23 to rotate; the pen is smooth in advancing and retreating, free of jamming and pause and low in noise.

Wherein, both sides of the mounting base 1 are respectively provided with a U-shaped groove 18 with an upward opening, the other end (i.e. the end sliding away from the first clamping component 2) of the first clamping component 2 is rotatably arranged in one of the U-shaped grooves 18, and the other end (i.e. the end sliding away from the second clamping component 3) of the second clamping component is rotatably arranged in the other U-shaped groove. A sliding block 5 is sleeved on each of the first clamping assembly 2 and the second clamping assembly 3, and a return spring 560 is arranged between each sliding block 5 and the mounting base 1; the mounting seat 1 is provided with a sliding groove 12, and the sliding block 5 is slidably arranged in the sliding groove 12. Specifically, a guide plate 50 extends downwards from the sliding block 5, the guide plate 50 is arranged in the sliding groove 12 in a penetrating manner, and the guide plate 50 slides along the sliding groove 12 to ensure the movement precision of the sliding block 5, further ensure the movement precision of the first clamping assembly 2 and the second clamping assembly 3, and ensure the reliability of pen feeding and pen withdrawing; and the side surface of the guide plate 50 is provided with a limiting block 501, and the limiting block 501 is attached to the bottom of the mounting seat 1 to prevent the sliding block 5 from being separated from the mounting seat 1.

In the practical use process, the two sides of the mounting seat 1 of the automatic pencil feeding mechanism are provided with the strip-shaped grooves 10, one end of the first clamping component 2 and one end of the second clamping component 3 are slidably arranged in the strip-shaped grooves 10, the size of a gap 230 between the first clamping component 2 and the second clamping component 3 can be adjusted to adapt to pencils with different diameters, the first clamping component 2 and the second clamping component 3 are arranged in a central rotation symmetry mode, both the first clamping component 2 and the second clamping component 3 can slide on one side, and the slidable end rotates around the non-slidable end, so that the engagement precision requirement of the worm wheel 20 is generally high, the end part close to the worm wheel 20 side in the scheme is non-slidable, the engagement precision can be effectively ensured, the transmission precision is ensured, the transmission structure cannot fail, and the stability is high; meanwhile, the pen can be further ensured to be smoothly advanced and retreated, no jamming or pause and low noise is caused.

The sliding ends of the first clamping assembly 2 and the second clamping assembly 3 are sleeved with the sliding blocks 5, and the guide plates 50 on the two sliding blocks 5 are matched with the sliding grooves 12 on the mounting seat 1, so that the first clamping assembly 2 and the second clamping assembly 3 can slide reliably, and the limiting blocks 501 on the side surfaces of the guide plates 50 can effectively prevent the sliding blocks 5 from being separated from the mounting seat 1; the reset spring 560 can ensure that the pencil is clamped tightly, and can ensure that the two sliders 5 are driven to reset after the pencil is withdrawn, so as to drive the first clamping assembly 2 and the second clamping assembly 3 to reset.

The first clamping assembly 2 and the second clamping assembly 3 both comprise an axle 22 and a clamping wheel 23 arranged on the axle 22, and the clamping wheel 23 is a soft plastic wheel, namely a flexible piece; the worm gear 20 is disposed on an axle 22.

The second embodiment is as follows:

as shown in fig. 5-8, the difference between the automatic pen feeding mechanism of the present embodiment and the embodiment is mainly reflected in that in the present embodiment, the structure of the slider 5 and the spring 560 is eliminated; tension springs 7 are added at two ends of the first clamping assembly 2 and the second clamping assembly 3; other similar structures are not described in detail herein.

Specifically, the automatic pen feeding mechanism further comprises two tension springs 7; the clamping device is respectively connected to two ends of the first clamping component 2 and the second clamping component 3; wherein, both ends of the tension spring 7 are provided with a connecting ring 70, both ends of the first clamping component 2 and both ends of the second clamping component 3 are provided with an annular groove 21, and the connecting ring 70 is arranged in the annular groove 21.

Through connecting a straining spring 7 (totally two) respectively at the both ends of first centre gripping subassembly 2 and second centre gripping subassembly 3, guarantee that the atress is balanced, press from both sides a reliable, and can simplify the overall structure of automatic pen mechanism of advancing, reduce straining spring 7's use quantity, reduce manufacturing cost.

In the scheme, the automatic pencil feeding mechanism is high in transmission precision and low in noise, and can be suitable for pencils with different diameters, and the pencils are reliably clamped.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The utility model provides an automatic mechanism of advancing of worm gear transmission formula which characterized in that, including:

a mounting seat;

the first clamping assembly and the second clamping assembly are arranged on the mounting seat; a gap for a pencil to penetrate through is formed between the first clamping assembly and the second clamping assembly, and the size of the gap is adjustable; the first clamping assembly and the second clamping assembly comprise worm gears;

the driving device is arranged on the mounting seat and comprises a transmission piece and a driving piece for driving the transmission piece; the transmission part is provided with a worm, and the worm is in meshing transmission with the worm wheel.

2. The worm and gear drive type automatic pencil feeding mechanism of claim 1, wherein the drive member comprises a first drive member and a second drive member, and the first drive member and the second drive member are synchronously driven by the drive member;

the worm on the first transmission piece is in meshing transmission with the worm wheel of the first clamping assembly, and the worm on the second transmission piece is in meshing transmission with the worm wheel of the second clamping assembly.

3. The worm-gear transmission type automatic pen feeding mechanism as claimed in claim 1 or 2, wherein a plurality of driving teeth are projected on the driving member, a driving fluted disc is arranged at the bottom of the driving member, and the worm is arranged on the driving fluted disc; and the transmission fluted disc is in meshing transmission with the driving teeth.

4. The worm-gear drive type automatic pencil feeding mechanism as claimed in claim 3, wherein the driving teeth are arranged as convex columns, and the diameters of the convex columns are gradually increased from top to bottom.

5. The worm and gear transmission type automatic pencil feeding mechanism of claim 1, further comprising a cover body detachably disposed on the mounting seat; one end of the transmission piece is rotatably arranged on the mounting seat, and the other end of the transmission piece is rotatably arranged on the cover body.

6. The worm and gear transmission type automatic pencil feeding mechanism of claim 1, wherein the first clamping assembly and the second clamping assembly are arranged in a central rotation symmetry manner;

the both sides of mount pad are equipped with a opening bar groove up respectively, the one end slidable of first centre gripping subassembly sets up wherein one in the bar groove, the one end slidable of second centre gripping subassembly sets up another in the bar groove.

7. The worm and gear transmission type automatic pencil feeding mechanism as claimed in claim 6, wherein the mounting seat is provided with a U-shaped groove with an upward opening at each side, the other end of the first clamping assembly is rotatably disposed in one of the U-shaped grooves, and the other end of the second clamping assembly is rotatably disposed in the other U-shaped groove.

8. The worm and gear transmission type automatic pen feeding mechanism according to claim 6 or 7, wherein a sliding block is sleeved on each of the first clamping assembly and the second clamping assembly, and a return spring is arranged between each sliding block and the mounting seat;

the mounting seat is provided with a sliding groove, and the sliding block is slidably arranged in the sliding groove.

9. The worm and gear transmission type automatic pencil feeding mechanism of claim 8, wherein a guide plate extends downwards from the sliding block, the guide plate is arranged in the sliding groove in a penetrating manner, a limiting block is arranged on the side surface of the guide plate, and the limiting block is attached to the bottom of the mounting seat.

10. The worm-gear transmission type automatic pencil feeding mechanism of claim 6 or 7, characterized by further comprising two tension springs; the clamping device is connected to two ends of the first clamping assembly and the second clamping assembly respectively;

and connecting rings are arranged at two ends of the tensioning spring, annular grooves are arranged at two ends of the first clamping assembly and two ends of the second clamping assembly, and the connecting rings are arranged in the annular grooves.

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