CN111252587B

CN111252587B - Separating claw and its applicable clutch structure

Info

Publication number: CN111252587B
Application number: CN201811452015.6A
Authority: CN
Inventors: 陈鼎钧; 锺明杰
Original assignee: Teco Image Systems Co Ltd
Current assignee: Teco Image Systems Co Ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2021-07-09
Anticipated expiration: 2038-11-30
Also published as: CN111252587A

Abstract

The invention discloses a separation claw and a suitable clutch structure. The separation claw is suitable for a clutch structure with a rotating shaft. The separation claw includes a claw part, a base part and at least two elastic parts. The base portion is opposite to the claw portion and has an outer peripheral edge, and the claw portion and the base portion are coaxially arranged on the rotating shaft. Each elastic portion at least partially surrounds a portion of the claw portion to provide elastic force. Each elastic portion has a first end portion and a second end portion located at different ends, the first end portion is connected to the base portion and extends from the outer periphery, the second end portion is connected to the claw portion, and the first end portion is connected to the base portion. There is at least one compressible bending section between the first end and the second end. Thereby, the elastic portion provides axial elastic force and torsional elastic force between the claw portion and the base portion to prevent collision damage, and avoid the impact and friction generated when the separation claw rotates instantaneously, thereby achieving the effect of reducing noise.

Description

Separation claw and applicable clutch structure thereof

Technical Field

The invention relates to a separating claw and a clutch structure suitable for the same, in particular to a separating claw with elastic characteristics and a clutch structure suitable for the same.

Background

In the multi-function printer or printer, the paper box is usually designed as a drawer for adding paper, so the paper-carrying roller needs to be engaged with and disengaged from the transmission system. Generally, the end of the feed roller has a disengaging pawl that is engageable with the drive train. When the paper is separated, the power cannot be transmitted to the paper-carrying roller; when the paper is combined, the power can be transmitted to the paper-carrying roller to smoothly carry out the paper-carrying action.

When the separating pawl engages the drive system, it is bumped as a result of the engaging of the separating pawl at random angles to the drive system. In order to avoid the damage of the separating claw due to the impact, in the prior art, the clutch structure is designed to include the separating claw, a spring and a metal snap ring, and the spring is disposed between the metal snap ring and the separating claw to absorb the impact by the elastic force of the spring.

However, in the conventional structure design of the separating pawl and the spring, when the separating pawl rotates, the spring often rubs the metal retaining ring, and the contact surface between the spring and the separating pawl generates friction, which causes noise. Moreover, after the spring is used for a long time, the elastic force of the spring is attenuated.

Therefore, how to develop a separating claw and a clutch structure suitable for the separating claw is a key subject in the prior art, so as to improve the problems and disadvantages in the prior art, avoid the impact and friction generated during the separation and the rotation of the separating claw, reduce the noise generation, and avoid the attenuation of the elastic force after long-term use.

Disclosure of Invention

The primary objective of the present invention is to provide a separating pawl and a clutch structure suitable for the same, so as to solve and improve the problems and disadvantages of the prior art.

Another object of the present invention is to provide a release pawl and a clutch structure suitable for the same, in which the release pawl is connected between the pawl portion and the base portion by an elastic portion, so that the elastic portion can provide an axial elastic force between the pawl portion and the base portion to prevent collision damage. Meanwhile, the elastic part can provide torsional elasticity between the claw part and the base part so as to avoid impact and friction generated when the separation claw rotates instantly, and the claw part rotates synchronously with the elastic part and the rotating shaft when the separation claw rotates, thereby achieving the effect of reducing noise.

Another object of the present invention is to provide a release pawl and a clutch structure suitable for the same, in which the resilient portion having a compressible bending section is provided to uniformly disperse stress and reduce stress concentration when storing elastic potential energy, so as to prevent elastic force from being attenuated after long-term use.

Another objective of the present invention is to provide a release pawl and a clutch structure suitable for the release pawl, wherein the base of the release pawl is tightly fitted with the rotating shaft, so that the pressure of the release pawl can resist the axial force generated by the compression of the release pawl. In addition, the claw part, the base part and the elastic part are integrally formed through the characteristic design of the flexible elastic arm, so that the number of parts of the clutch structure can be reduced, and the assembly of the clutch structure is simplified.

In order to achieve the above object, a preferred embodiment of the present invention provides a separating pawl, which is adapted to a clutch structure, the clutch structure having a rotating shaft, the separating pawl comprising a pawl portion, a base portion and at least two elastic portions. A base part opposite to the claw part and having an outer periphery, wherein the claw part and the base part are coaxially arranged on the rotating shaft; each elastic part at least partially surrounds part of the claw part to provide elastic force; each elastic part is provided with a first end part and a second end part which are positioned at two different ends, the first end part is connected with the base part and extends out from the outer periphery, the second end part is connected with the claw part, and at least one bending section which can be compressed is arranged between the first end part and the second end part.

In order to achieve the above object, another preferred embodiment of the present invention provides a clutch structure including a roller set, a rotating shaft, and a release pawl. A rotating shaft is arranged in the roller group in a penetrating way; a separation claw includes a claw portion, a base portion and at least two elastic portions. A base part opposite to the claw part and having an outer periphery, wherein the claw part and the base part are coaxially arranged on the rotating shaft; each elastic part at least partially surrounds part of the claw part to provide elastic force; each elastic part is provided with a first end part and a second end part which are positioned at two different ends, the first end part extends out from the outer periphery of the base part, the second end part is connected with the claw part and is abutted against the claw part, and at least one bending section which can be compressed is arranged between the first end part and the second end part.

According to the technical scheme, the separating claw and the applicable clutch structure thereof have the advantages and positive effects that:

the separation claw is connected with the claw part and the base part through the elastic part, so that the elastic part can provide axial elastic force between the claw part and the base part to prevent collision damage. Meanwhile, the elastic part can provide torsional elasticity between the claw part and the base part so as to avoid impact and friction generated when the separation claw rotates instantly, and the claw part rotates synchronously with the elastic part and the rotating shaft when the separation claw rotates, thereby achieving the effect of reducing noise. In addition, through the elastic part with the compressible bending section, the stress can be uniformly dispersed when the elastic potential energy is stored, and the stress concentration is reduced, so that the elastic attenuation after long-term use is avoided.

Furthermore, the base of the separation claw is tightly matched with the rotating shaft, so that the pressure of the separation claw can resist the axial force generated when the separation claw is compressed.

Drawings

Fig. 1 shows a schematic structure of a separating claw and a clutch structure suitable for the separating claw according to a preferred embodiment of the invention.

Fig. 2 is an exploded view of a separating pawl and a clutch structure adapted thereto according to a preferred embodiment of the present invention.

Fig. 3 shows a schematic view of the structure of the separation claw according to the preferred embodiment of the present invention.

FIG. 4 is a schematic view of the separating pawl shown in FIG. 3 from another perspective.

The reference numbers are as follows:

1: separation claw

10: claw part

100: body

101: claw-shaped body

11: base part

111: opening holes

112: slit

110: outer peripheral edge

12: elastic part

121: first end part

122: second end portion

123: bending section

2: clutch structure

20: rotating shaft

200: ring groove

201: hole(s)

21: roller set

22: bolt

Detailed Description

Some exemplary embodiments that embody features and advantages of the invention will be described in detail in the description that follows. It is to be understood that the invention is capable of various modifications in various embodiments without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, in which fig. 1 shows a schematic structural view of a separating pawl and a clutch structure applied thereto according to a preferred embodiment of the present invention, fig. 2 shows an exploded structural view of the separating pawl and the clutch structure applied thereto according to the preferred embodiment of the present invention, fig. 3 shows a schematic structural view of the separating pawl according to the preferred embodiment of the present invention, and fig. 4 shows a schematic structural view of the separating pawl shown in fig. 3 from another view angle. As shown in fig. 1, 2, 3 and 4, the separation claw 1 according to the preferred embodiment of the present invention is adapted to a clutch structure 2, and the clutch structure 2 has a rotating shaft 20, wherein the clutch structure 2 is, for example, but not limited to, a paper-carrying roller structure for conveying paper.

The separation claw 1 comprises a claw portion 10, a base portion 11 and at least two resilient portions 12, wherein the claw portion 10 is for example, but not limited to, for mating engagement with a transmission system. The base 11 is opposite to the claw 10 and has an outer peripheral edge 110, wherein the claw 10 and the base 11 are coaxially provided on the rotating shaft 20. Each resilient portion 12 at least partially surrounds a portion of the outer periphery of the jaw 10 to provide a resilient force. In some embodiments, the claw portion 10, the base portion 11 and the at least two elastic portions 12 are integrally formed, such as but not limited to, integrally formed by a lamination process of a three-dimensional structure.

Each of the elastic parts 12 has a first end portion 121 and a second end portion 122 at two different ends, the first end portion 121 is connected to the base 10, and the first end portion 121 extends from the outer periphery 110 of the base 10. The second end portion 122 is connected to the claw portion 10, and at least one bending section 123 is disposed between the first end portion 121 and the second end portion 122, that is, the first end portion 121 is connected to the second end portion 122 through the bending section 123, wherein the at least one bending section 123 is C-shaped or S-shaped, but not limited thereto. Thereby, the elastic part 12 provides the axial elastic force and the torsion elastic force between the claw part 10 and the base part 11.

For example, the first end portion 121 extends axially from the outer periphery 110 of the base portion 10 and is connected to one end of the bending section 123, and the other end of the bending section 123 extends axially and is connected to the second end portion 122, wherein one end of the bending section 123 is connected to the first end portion 121 in a bending manner, and the other end of the bending section 123 is connected to the second end portion 122 in a bending manner, so as to uniformly disperse the stress and provide the torsion.

In other words, in the release pawl and the clutch structure applied thereto according to the present invention, the elastic portion connects the pawl portion and the base portion, so that the elastic portion can provide an axial elastic force between the pawl portion and the base portion to prevent collision damage. Meanwhile, the elastic part can provide torsional elasticity between the claw part and the base part so as to avoid impact and friction generated when the separation claw rotates instantly, and the claw part rotates synchronously with the elastic part and the rotating shaft when the separation claw rotates, thereby achieving the effect of reducing noise. And, through setting up the elastic part that has compressible bending segment, make it when storing elasticity potential energy, evenly disperse stress, reduce stress concentration to avoid long-term back elasticity decay.

One end of a rotating shaft 20 of the clutch structure 2 is inserted into a base part 11 and a claw part 10 of a separation claw 1, and the base part 11 is tightly matched with the rotating shaft 20. In some embodiments, the base 11 has an opening 111 and a plurality of slits 112, the plurality of slits 112 are circumferentially disposed around the opening 111, the plurality of slits 112 are communicated with the opening 111, and the shaft 20 passes through the opening 111. The plurality of slits 112 communicate with the opening 111 such that the size of the opening 111 is slightly enlarged, thereby allowing the opening 111 to tightly fit the shaft 20 and generate a pressure to ensure that the base 11 and the shaft 20 do not rotate or translate relative to each other.

In some embodiments, the claw portion 10 of the separation claw 1 has a body 100 and a claw 101, the claw 101 protrudes from the body 100 for matching engagement with a transmission system, and the rotating shaft 20 penetrates through the body 100. Also, each elastic portion 12 at least partially surrounds a portion of the body 100 of the claw portion 10, and the second end 122 of each elastic portion 12 abuts against the claw body 101, so as to provide elastic force more stably.

In some embodiments, the number of the at least two elastic portions 12 is two, and the first end portions 121 of the two elastic portions 12 extend from the outer periphery 110 of the base portion 11 symmetrically to the rotation axis 20, so as to stably and evenly provide the axial elastic force and the torsional elastic force when the claw portion 10 and the base portion 11 generate the relative rotational displacement.

In other words, the base of the separation claw is tightly matched with the rotating shaft, so that the generated pressure can resist the axial force generated when the separation claw is compressed. In addition, the claw part, the base part and the elastic part are integrally formed by the characteristic design of the flexible elastic arm, so that the number of parts of the clutch structure can be reduced, and the assembly of the clutch structure is simplified.

Please refer to fig. 1 to 4. As shown in fig. 1 to 4, the clutch structure 2 of the preferred embodiment of the present invention includes a roller set 21, a rotating shaft 20 and a separating claw 1, wherein the roller set 21 is, for example, but not limited to, a paper-carrying roller. The rotating shaft 20 is inserted through the roller set 21, and the separation claw 1 includes a claw portion 10, a base portion 11 and at least two elastic portions 12. The base 11 is opposite to the claw 10 and has an outer peripheral edge 110, wherein the claw 10 and the base 11 are coaxially disposed at one end of the rotating shaft 20. Each resilient portion 12 at least partially surrounds a portion of the outer periphery of the jaw 10 to provide a resilient force. The claw portion 10, the base portion 11, and the at least two elastic portions 12 are integrally formed, but not limited thereto. The detailed structure of the elastic portion 12 is described in detail above, and therefore, the detailed description thereof is omitted.

In some embodiments, the clutch structure 2 further includes a plug 22 penetrating the rotating shaft 20 and abutting against the separating claw 1, so that the rotating shaft 20 and the roller set 21 are driven by the separating claw 1 when the separating claw 1 rotates. One end of the shaft 20 further has an annular groove 200 and a hole 201, the base 11 of the separating pawl 1 is sleeved on the annular groove 200, and the plug 22 is inserted through the hole 201 and abuts against the separating pawl 1, so that the assembly of the clutch structure 2 is more stable, but not limited thereto.

In summary, the present invention provides a separating pawl and a clutch structure suitable for the same, in which the separating pawl is connected to the base portion by an elastic portion, so that the elastic portion can provide an axial elastic force between the pawl portion and the base portion to prevent collision damage. Meanwhile, the elastic part can provide torsional elasticity between the claw part and the base part so as to avoid impact and friction generated when the separation claw rotates instantly, and the claw part rotates synchronously with the elastic part and the rotating shaft when the separation claw rotates, thereby achieving the effect of reducing noise. In addition, through the elastic part with the compressible bending section, the stress can be uniformly dispersed when the elastic potential energy is stored, and the stress concentration is reduced, so that the elastic attenuation after long-term use is avoided. Furthermore, the base of the separation claw is tightly matched with the rotating shaft, so that the pressure of the separation claw can resist the axial force generated when the separation claw is compressed. In addition, the claw part, the base part and the elastic part are integrally formed through the characteristic design of the flexible elastic arm, so that the number of parts of the clutch structure can be reduced, and the assembly of the clutch structure is simplified.

Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to one skilled in the art that various modifications can be made without departing from the scope of the invention as defined in the appended claims.

Claims

1. A separation claw, suitable for a clutch structure having a rotating shaft, the separation claw comprising:

a claw

a base portion opposite to the claw portion and having an outer periphery, an opening and a plurality of slits, wherein the claw portion and the base portion are coaxially disposed on the rotating shaft, and the rotating shaft passes through the base portion and the claw portion, The base is tightly fitted with the rotating shaft, the plurality of slits are annularly distributed in the opening and communicate with the opening, and the rotating shaft passes through the opening; and

at least two elastic parts, each elastic part at least partially surrounds a part of the claw part to provide an elastic force;

Wherein, each of the elastic portions has a first end portion and a second end portion located at different ends, the first end portion is connected to the base portion and extends from the outer periphery, and the second end portion is connected to the base portion. The claw parts are connected, and there is at least one compressible bending section between the first end part and the second end part.

2 . The separating claw of claim 1 , wherein the claw portion has a main body and a claw-shaped body, the claw-shaped body protrudes from the main body, and the rotating shaft passes through the main body. 3 .

3 . The separating claw of claim 2 , wherein each of the elastic portions at least partially surrounds a portion of the body, and the second end portion of each of the elastic portions abuts against the claw-shaped body. 4 .

4. The separating claw of claim 1, wherein the claw portion, the base portion and the at least two elastic portions are integrally formed.

5 . The separating claw of claim 1 , wherein the number of the at least two elastic portions is two, and the first end portions of the two elastic portions extend out from the outer periphery of the base portion symmetrically to the rotating shaft. 6 . .

6 . The separating claw as claimed in claim 1 , wherein the at least one bending section is a C-shaped bending or an S-shaped bending. 7 .

7. A clutch structure, comprising:

a set of rollers;

a rotating shaft passing through the roller set; and

A separation claw, including:

a claw

Wherein, each of the elastic portions has a first end portion and a second end portion located at different ends, the first end portion extends from the outer periphery of the base portion, the second end portion and the claw portion It is connected to and abuts against the claw, and there is at least one compressible bending section between the first end and the second end.

8 . The clutch structure as claimed in claim 7 , further comprising a latch that penetrates through the rotating shaft and abuts against the separating claw. 9 .