CN111120609A

CN111120609A - Drive assembly of film stretching chain clamp and film stretching device

Info

Publication number: CN111120609A
Application number: CN202010234103.XA
Authority: CN
Inventors: 汤智勇; 何汉昭; 梁达辉; 吴耀坤
Original assignee: Mce Stretching Industry Co ltd
Current assignee: Mce Stretching Industry Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-05-08
Anticipated expiration: 2040-03-30
Also published as: CN111120609B

Abstract

The invention relates to a driving assembly of a film stretching chain clamp and a film stretching device. The slow-speed fluted disc is used for driving the rear driving wheel of the chain clamp to move. The auxiliary fluted disc and the slow fluted disc are coaxially arranged and synchronously run, the auxiliary fluted disc is positioned above the slow fluted disc, the diameter of the auxiliary fluted disc is larger than that of the slow fluted disc, and the auxiliary fluted disc is used for driving the chain clamp to move. In the process that the slow-speed fluted disc runs to drive the rear driving wheel of the chain clamp to move, the auxiliary fluted disc synchronously contacts the chain clamp and synchronously drives the chain clamp to move, so that the stress point of the chain clamp in the moving process of the area corresponding to the slow-speed fluted disc is not only the rear driving wheel, but also synchronously receives the driving force applied by the auxiliary fluted disc, the mechanical stress coordination is greatly improved, the normal operation of the chain clamp is prevented from being influenced by the unbalanced stress of the chain clamp in the area corresponding to the slow-speed fluted disc, and meanwhile, the mechanical device is prevented from being deformed and damaged due to the unbalanced stress for a long time.

Description

Drive assembly of film stretching chain clamp and film stretching device

Technical Field

The invention relates to the technical field of film stretching treatment, in particular to a driving assembly of a film stretching chain clamp and a film stretching device.

Background

With the development of film stretching technology, film stretching apparatuses have emerged. The film is stretched in a proper temperature range (under high elastic state) above the glass transition temperature and below the melting point by a film stretching device under the action of external force in a certain multiple along the longitudinal direction and the transverse direction, so that molecular chains or crystal planes are oriented and orderly arranged in the direction parallel to the plane of the film, then heat setting is carried out in a tensioning state, the oriented macromolecular structure is fixed, and finally the film can be prepared through cooling and subsequent treatment.

The conventional film stretching apparatus includes a rail, a chain clamp and a toothed disc. The track comprises a front track plate and a rear track plate which are arranged at intervals. The chain clamp comprises a front moving seat, a rear moving seat and a connecting rod which can rotatably connect the front moving seat and the rear moving seat. The front moving seat is slidably arranged on the front track plate, the rear moving seat is slidably arranged on the rear track plate, the front moving seat is provided with a front driving wheel, and the rear moving seat is provided with a rear driving wheel. The fluted discs comprise a fast fluted disc which runs fast and a slow fluted disc which runs slowly, power is applied to the front driving wheel and the rear driving wheel, and the front driving wheel and the rear driving wheel are driven to move along the track plate. Wherein, under the unchangeable circumstances of chain clamp width, the length of connecting rod has been decided to stretching device's nominal longitudinal stretching multiple: the greater the nominal longitudinal stretch, the longer the tie rod is required. For the application occasions with continuously increased film stretching times, the length of the connecting rod needs to be correspondingly lengthened. However, the relatively long length of the connecting rod is prone to deformation and damage of the mechanical device when the connecting rod runs in the working area of the slow-speed fluted disc.

Disclosure of Invention

Therefore, it is necessary to overcome the defects of the prior art and provide a driving assembly of a film stretching chain clamp and a film stretching device, which can improve mechanical stress coordination and avoid deformation and damage of mechanical devices.

The technical scheme is as follows: a drive assembly for a film stretching chain gripper, the drive assembly comprising: the slow-speed fluted disc is used for driving a rear driving wheel of the chain clamp to move; and the auxiliary fluted disc and the slow fluted disc are coaxially arranged and synchronously run, the auxiliary fluted disc is positioned above the slow fluted disc, the diameter of the auxiliary fluted disc is greater than that of the slow fluted disc, the number of teeth of the auxiliary fluted disc is the same as that of the slow fluted disc, and the auxiliary fluted disc is used for driving the chain clamp to move.

The drive assembly of foretell tensile chain clamp of film, the in-process that the back drive wheel that slow speed fluted disc operation drive chain pressed from both sides removed, because supplementary fluted disc synchronous contact chain presss from both sides and the synchronous drive chain presss from both sides and removes, the stress point that moves the chain clamp in-process in the region that slow speed fluted disc corresponds not only is the back drive wheel like this, and receive the drive power that supplementary fluted disc applyed in step, mechanical atress harmony can improve greatly, thereby can avoid the chain clamp to influence its normal operating at the regional unbalanced stress that slow speed fluted disc corresponds, avoid mechanical device to warp the damage because long-term unbalanced stress simultaneously.

In one embodiment, the auxiliary toothed disc is adapted to contact the front drive wheel of the chain clamp to drive movement of the front drive wheel.

In one embodiment, the auxiliary toothed disc is used for contacting with an auxiliary driving wheel arranged on a connecting rod of the chain clamp so as to drive the auxiliary driving wheel to move.

In one embodiment, the driving assembly of the film stretching chain clamp further comprises a driving motor, and a power output shaft of the driving motor is connected with the slow-speed fluted disc; the auxiliary fluted disc is fixedly arranged on the slow fluted disc.

In one embodiment, the auxiliary fluted disc and the slow fluted disc are of an integrated structure; or the auxiliary fluted disc is detachably connected with the slow fluted disc; or a hollow-out opening is formed in the middle of the auxiliary fluted disc.

A film stretching device comprises a driving component of the film stretching chain clamp, a track and the chain clamp arranged on the track; the track comprises a front track plate and a rear track plate which are arranged at intervals; the chain clamp comprises a plurality of first moving assemblies, a plurality of second moving assemblies and a plurality of connecting rods; the first moving assemblies are sequentially and movably arranged on a front track plate, the second moving assemblies are sequentially and movably arranged on a rear track plate, the first moving assemblies and the second moving assemblies are alternately arranged, each first moving assembly comprises a front moving seat moving along the front track plate, a film clamping piece arranged on the front moving seat and a front driving wheel arranged on the front moving seat, and each second moving assembly comprises a rear moving seat moving along the rear track plate and a rear driving wheel arranged on the rear moving seat;

the connecting rod is correspondingly arranged between the adjacent first moving assembly and the second moving assembly, one end of the connecting rod is rotatably connected with the first moving assembly, and the other end of the connecting rod is rotatably connected with the second moving assembly;

the slow fluted disc is in contact with the rear driving wheel to drive the rear driving wheel to move, and the auxiliary fluted disc is in contact with the first moving assembly or the connecting rod to drive the first moving assembly or the connecting rod to move.

In the film stretching device, the slow-speed fluted disc operates to drive the rear driving wheel of the chain clamp to move, and the auxiliary fluted disc synchronously contacts with the chain clamp and synchronously drives the chain clamp to move, so that the stress point of the chain clamp in the moving process of the area corresponding to the slow-speed fluted disc is not only the rear driving wheel, but also synchronously receives the driving force applied by the auxiliary fluted disc, the mechanical stress coordination is greatly improved, the normal operation of the chain clamp is prevented from being influenced by the unbalanced stress of the area corresponding to the slow-speed fluted disc, and meanwhile, the mechanical device is prevented from being deformed and damaged due to the unbalanced stress for a long time.

In one embodiment, the film stretching device further comprises an inlet platform, an outlet platform and a quick fluted disc; the number of the inlet platforms, the number of the outlet platforms, the number of the tracks and the number of the chain clamps are two, the number of the fast fluted discs is more than two, and the number of the slow fluted discs is two; the tracks are annular tracks, and the two chain clamps are arranged on the two tracks in a one-to-one correspondence manner; one of said entrance platforms and one of said exit platforms are adapted to receive one of said tracks, and the other of said entrance platforms and the other of said exit platforms are adapted to receive the other of said tracks; and each inlet platform is provided with a fast fluted disc and a slow fluted disc at intervals, and each outlet platform is provided with a fast fluted disc.

In one embodiment, the first moving assembly further comprises two first rollers rotatably disposed on the front moving seat, and the two first rollers are respectively disposed on two sides of the front track plate and can roll along the side surface of the front track plate; the second moving assembly further comprises two second rollers which are rotatably arranged on the rear moving seat, and the two second rollers are respectively arranged on two sides of the rear track plate and can roll along the side face of the rear track plate.

In one embodiment, the first moving assembly further comprises a third roller rotatably disposed on the front moving seat, the third roller being disposed on the top surface of the front track plate and capable of rolling along the top surface of the front track plate; the second moving assembly further comprises a fourth roller which is rotatably arranged on the rear moving seat, and the fourth roller is arranged on the top surface of the rear track plate and can roll along the top surface of the rear track plate.

In one embodiment, the connecting rod comprises more than two chain plates, one end of each chain plate is rotatably connected with the front moving seat, and the other end of each chain plate is connected with the rear moving seat; the two side faces of the first idler wheels, close to the rear track plate, are respectively provided with the chain plates, and the two side faces of the second idler wheels, close to the front track plate, are respectively provided with the chain plates.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a driving assembly of a film stretching chain clamp according to an embodiment of the present invention;

FIG. 2 is a top view of the inlet platform of the film stretching assembly in one embodiment of the present invention;

FIG. 3 is a schematic view of a drive assembly of a film stretching chain gripper according to another embodiment of the present invention;

FIG. 4 is a top view of a film stretching assembly at the entrance station of another embodiment of the present invention;

FIG. 5 is a schematic view of a chain clip of the film stretching apparatus installed on a track according to an embodiment of the present invention;

FIG. 6 is an enlarged schematic view of FIG. 5 at A;

FIG. 7 is a structural diagram of a chain clip of the film stretching device installed on a rail according to another view angle of the present invention;

fig. 8 is a schematic view of a chain clip of the film stretching device installed on a rail and along the direction of a front rail plate according to an embodiment of the present invention.

10. A slow fluted disc; 20. an auxiliary fluted disc; 30. an auxiliary drive wheel; 40. a chain clip; 410. a first moving assembly; 411. a forward moving seat; 4111. a recess; 4112. a support plate; 4113. cushion blocks; 412. a first roller; 413. a film holder; 4131. a clamping head; 4132. a handle; 414. a third roller; 415. a front drive wheel; 420. a second moving assembly; 421. a rear moving seat; 4211. a recess; 4212. cushion blocks; 422. a second roller; 423. a fourth roller; 424. a fifth roller; 425. a rear drive wheel; 430. a connecting rod; 431. a chain plate; 50. a track; 51. a front track plate; 52. a rear track plate; 60. a limiting member; 70. an entrance platform; 80. a quick fluted disc; 90. a film.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Generally, when the connecting rod with relatively long length runs in the working area of the slow gear, the tooth part of the slow gear is only meshed with the rear driving wheel and is not meshed with the front driving wheel because the chain clamp is in a contraction state. That is, the tooth portion of the slow gear plate exerts only an urging force on the rear clamp body in the wrap angle region of the slow gear plate, and cannot drive the front clamp body at the other end of the connecting rod. Therefore, when the length of the connecting rod is longer, the negative effect of unbalanced stress of the mechanism is increased, and the large number of side-by-side chain clamps are in the driving state and are pushed to operate, so that the pressure bearing load of stress parts of related elements is greatly increased, and the deformation and the damage of a mechanical device are easily caused.

Referring to fig. 1 and 2, fig. 1 is a schematic diagram illustrating a driving assembly of a film stretching chain clamp according to an embodiment of the present invention, and fig. 2 is a top view illustrating an inlet platform 70 of a film stretching apparatus according to an embodiment of the present invention. The driving assembly of the film stretching chain clamp provided by one embodiment of the present invention comprises a slow gear 10 and an auxiliary gear 20. The slow toothed disc 10 is used to drive the rear drive wheel 425 of the chain clamp 40. The auxiliary fluted disc 20 and the slow fluted disc 10 are coaxially arranged and synchronously run, the auxiliary fluted disc 20 is located above the slow fluted disc 10, the diameter of the auxiliary fluted disc 20 is greater than that of the slow fluted disc 10, the number of teeth of the auxiliary fluted disc 20 is the same as that of the slow fluted disc 10, and the auxiliary fluted disc 20 is used for driving the chain clamp 40 to move.

In the above-mentioned driving assembly of the film stretching chain clamp, in the process that the slow-speed fluted disc 10 operates to drive the rear driving wheel 425 of the chain clamp 40 to move, since the auxiliary fluted disc 20 synchronously contacts the chain clamp 40 and synchronously drives the chain clamp 40 to move, the stress point of the chain clamp 40 in the moving process of the area corresponding to the slow-speed fluted disc 10 is not only the rear driving wheel 425 but also synchronously receives the driving force exerted by the auxiliary fluted disc 20, the mechanical stress coordination is greatly improved, thereby the influence of unbalanced stress on the chain clamp 40 in the area corresponding to the slow-speed fluted disc 10 on the normal operation of the chain clamp can be avoided, and the deformation and damage of the mechanical device caused by unbalanced stress for a long time can be avoided.

Further, the auxiliary toothed disc 20 is adapted to contact the front drive wheel 415 of the chain clamp 40 to drive the front drive wheel 415 in movement. Specifically, the tooth opening of the auxiliary toothed plate 20 can be fitted over the side wall of the front drive wheel 415, for example, the tooth opening of the auxiliary toothed plate 20 can be fitted over the side wall of the front drive wheel 415, so that the front drive wheel 415 is driven forward by the auxiliary toothed plate 20 when it rotates. In addition, in order to achieve synchronous contact between the slow toothed disc 10 and the auxiliary toothed disc 20 and the rear driving wheel 425 and the front driving wheel 415 respectively, the auxiliary toothed disc 20 is located above the slow toothed disc 10, that is, the top of the front driving wheel 415 is higher than the rear driving wheel 425, so that the auxiliary toothed disc 20 can synchronously contact the front driving wheel 415.

Referring to fig. 3 and 4, fig. 3 is a schematic diagram showing a driving assembly of a film stretching chain clamp according to another embodiment of the present invention, and fig. 4 is a top view showing an inlet platform 70 of a film stretching apparatus according to another embodiment of the present invention. In some embodiments, the auxiliary toothed disc 20 is used to contact the auxiliary driving wheel 30 mounted on the connecting rod 430 of the chain clamp 40 to drive the auxiliary driving wheel 30 to move. Specifically, the tooth opening portion of the auxiliary toothed disc 20 can be sleeved outside the sidewall of the auxiliary driving wheel 30, for example, the tooth opening portion of the auxiliary toothed disc 20 is matched with the sidewall of the auxiliary driving wheel 30, so that the auxiliary driving wheel 30 is synchronously driven to move forward when the auxiliary toothed disc 20 rotates. In addition, in order to achieve synchronous contact between the slow toothed disc 10 and the auxiliary toothed disc 20 and the rear driving wheel 425 and the auxiliary driving wheel 30, respectively, the auxiliary toothed disc 20 is located above the slow toothed disc 10, that is, the top of the auxiliary driving wheel 30 is higher than the rear driving wheel 425, so that the auxiliary toothed disc 20 can synchronously contact the front driving wheel 415. Compared with the front driving wheel 415, the auxiliary driving wheel 30 is located on the connecting rod 430, and is closer to the rear driving wheel 425 than the front driving wheel 415, so that the diameter of the auxiliary toothed disc 20 can be relatively reduced, and especially when the film 90 is stretched longer than the connecting rod 430, the auxiliary driving wheel 30 is designed on the connecting rod 430, so that the volume size of the auxiliary toothed disc 20 can be reduced to a certain extent, and the cost can be saved.

Further, the driving assembly of the film stretching chain clamp also comprises a driving motor. And a power output shaft of the driving motor is connected with the slow fluted disc 10. The auxiliary fluted disc 20 is fixedly arranged on the slow fluted disc 10. Thus, when the driving motor drives the slow-speed gear 10 to rotate, the slow-speed gear 10 synchronously drives the auxiliary gear 20 to rotate.

It can be understood that the power output shaft can be directly connected to the slow-speed toothed disc 10, and a rotating shaft can be added between the power output shaft and the slow-speed toothed disc 10, that is, the power output shaft drives the rotating shaft to rotate, and the rotating shaft drives the slow-speed toothed disc 10 to rotate. Of course, a gear assembly can be further disposed between the power output shaft and the slow-speed fluted disc 10, the gear assembly is engaged with the slow-speed fluted disc 10, the power output shaft transmits the rotating force to the gear assembly, and the gear assembly drives the slow-speed fluted disc 10 to rotate.

Referring to any one of FIGS. 1-4, in order to illustrate the auxiliary toothed plate 20 and the slow toothed plate 10 disposed below the auxiliary toothed plate 20, FIGS. 1-4 illustrate a portion of the auxiliary toothed plate 20 hidden from view to expose the slow toothed plate 10 disposed below the auxiliary toothed plate 20. In one embodiment, the auxiliary toothed plate 20 is integral with the slow toothed plate 10. Alternatively, the auxiliary toothed disc 20 is detachably connected to the slow toothed disc 10. Or, a hollow is disposed at the middle part of the auxiliary fluted disc 20.

In one embodiment, referring to fig. 1 and fig. 2, a film stretching apparatus includes a driving assembly of a film stretching chain clamp according to any one of the above embodiments, and further includes a rail 50 and a chain clamp 40 disposed on the rail 50. The track 50 includes a front track plate 51 and a rear track plate 52 which are spaced apart from each other.

Referring to fig. 5, 6 and 8, the chain clip 40 includes a plurality of first moving elements 410, a plurality of second moving elements 420 and a plurality of connecting rods 430. The plurality of first moving assemblies 410 are configured to be sequentially movably disposed on the front track plate 51, the plurality of second moving assemblies 420 are configured to be sequentially movably disposed on the rear track plate 52, the first moving assemblies 410 and the second moving assemblies 420 are alternately disposed, the first moving assemblies 410 include a front moving base 411 moving along the front track plate 51, a film clamping member 413 disposed on the front moving base 411, and front driving wheels 415 disposed on the front moving base 411, and the second moving assemblies 420 include a rear moving base 421 moving along the rear track plate 52, and rear driving wheels 425 disposed on the rear moving base 421.

The connecting rod 430 is correspondingly disposed between the adjacent first moving assembly 410 and the second moving assembly 420, one end of the connecting rod 430 is rotatably connected with the first moving assembly 410, and the other end of the connecting rod 430 is rotatably connected with the second moving assembly 420.

Referring to fig. 1, 2 and 5, the slow gear plate 10 contacts the rear driving wheel 425 to drive the rear driving wheel 425 to move, and the auxiliary gear plate 20 contacts the first moving assembly 410 or the connecting rod 430 to drive the first moving assembly 410 or the connecting rod 430 to move.

In the film stretching device, when the slow-speed toothed disc 10 operates to drive the rear driving wheel 425 of the chain clamp 40 to move, the auxiliary toothed disc 20 synchronously contacts the chain clamp 40 and synchronously drives the chain clamp 40 to move, so that the stress point of the chain clamp 40 in the moving process of the area corresponding to the slow-speed toothed disc 10 is not only the rear driving wheel 425 but also synchronously receives the driving force applied by the auxiliary toothed disc 20, the mechanical stress coordination is greatly improved, the normal operation of the chain clamp 40 is prevented from being influenced by the unbalanced stress of the area corresponding to the slow-speed toothed disc 10, and the deformation and damage of the mechanical device caused by the unbalanced stress of the mechanical device for a long time are avoided.

Specifically, referring to fig. 1 and 2, the auxiliary toothed disc 20 is configured to contact the front driving wheel 415 of the chain clamp 40 to drive the front driving wheel 415 to move. Specifically, the tooth opening of the auxiliary toothed plate 20 can be fitted over the side wall of the front drive wheel 415, for example, the tooth opening of the auxiliary toothed plate 20 can be fitted over the side wall of the front drive wheel 415, so that the front drive wheel 415 is driven forward by the auxiliary toothed plate 20 when it rotates. In addition, in order to achieve synchronous contact between the slow toothed disc 10 and the auxiliary toothed disc 20 and the rear driving wheel 425 and the front driving wheel 415 respectively, the auxiliary toothed disc 20 is located above the slow toothed disc 10, that is, the top of the front driving wheel 415 is higher than the rear driving wheel 425, so that the auxiliary toothed disc 20 can synchronously contact the front driving wheel 415.

As an alternative, referring to fig. 3 and 4, the link 430 is provided with an auxiliary driving wheel 30, and the auxiliary gear 20 is in contact with the auxiliary driving wheel 30 to drive the auxiliary driving wheel 30 to move. Specifically, the tooth opening portion of the auxiliary toothed disc 20 can be sleeved outside the sidewall of the auxiliary driving wheel 30, for example, the tooth opening portion of the auxiliary toothed disc 20 is matched with the sidewall of the auxiliary driving wheel 30, so that the auxiliary driving wheel 30 is synchronously driven to move forward when the auxiliary toothed disc 20 rotates. In addition, in order to achieve synchronous contact between the slow toothed disc 10 and the auxiliary toothed disc 20 and the rear driving wheel 425 and the auxiliary driving wheel 30, respectively, the auxiliary toothed disc 20 is located above the slow toothed disc 10, that is, the top of the auxiliary driving wheel 30 is higher than the rear driving wheel 425, so that the auxiliary toothed disc 20 can synchronously contact the front driving wheel 415. Compared with the front driving wheel 415, the auxiliary driving wheel 30 is located on the connecting rod 430, and is closer to the rear driving wheel 425 than the front driving wheel 415, so that the diameter of the auxiliary toothed disc 20 can be relatively reduced, and especially when the film 90 is stretched longer than the connecting rod 430, the auxiliary driving wheel 30 is designed on the connecting rod 430, so that the volume size of the auxiliary toothed disc 20 can be reduced to a certain extent, and the cost can be saved.

In one embodiment, referring to fig. 2 or 4, the film stretching apparatus further includes an inlet platform 70, an outlet platform (not shown), and a quick-toothed disk 80. The number of the inlet platforms 70, the number of the outlet platforms, the tracks 50 and the chain clips 40 are two, the number of the fast fluted discs 80 is two or more, and the number of the slow fluted discs 10 is two. The track 50 is an annular track 50, and the two chain clamps 40 are correspondingly arranged on the two tracks 50. One of the entrance platforms 70 and one of the exit platforms is adapted to receive one of the tracks 50, and the other of the entrance platforms 70 and the other of the exit platforms is adapted to receive the other of the tracks 50. Each inlet platform 70 is provided with the fast fluted disc 80 and the slow fluted disc 10 at intervals, and each outlet platform is provided with the fast fluted disc 80.

In an embodiment, referring to fig. 5, 6 and 8, the first moving assembly 410 further includes two first rollers 412 rotatably disposed on the front moving seat 411, and the two first rollers 412 are respectively disposed on two sides of the front track plate 51 and can roll along a side surface of the front track plate 51. The second moving assembly 420 further includes two second rollers 422 rotatably disposed on the rear moving base 421, and the two second rollers 422 are respectively disposed on two sides of the rear rail plate 52 and can roll along a side surface of the rear rail plate 52. Thus, when in use, the first moving assemblies 410 are sequentially mounted on the front track plate 51, the second moving assemblies 420 are sequentially mounted on the rear track plate 52, and the film clamping members 413 of the first moving assemblies 410 synchronously and correspondingly clamp a plurality of portions of one side of the film 90, respectively, so that the film 90 is clamped by the film stretching chain clamping members to move forward along the track 50. When the distance between the front track plate 51 and the rear track plate 52 changes, the included angle between two adjacent connecting rods 430 changes correspondingly, and then the distance between two adjacent film clamping pieces 413 changes, so as to stretch or shrink the film 90. When the film stretching chain clamp assembly moves on the two guide rails, the two first rollers 412 of the first moving assembly 410 are respectively arranged on the two sides of the front rail plate 51 and roll along the side surface of the front rail plate 51, and the second rollers 422 of the second moving assembly 420 are respectively arranged on the two sides of the rear rail plate 52 and roll along the side surface of the rear rail plate 52, so that the operation stability can be improved, and the operation failure rate is low.

It should be noted that, when the distance between the front rail plate 51 and the rear rail plate 52 is decreased, for example, the included angle between two adjacent connecting rods 430 is correspondingly increased, so that the distance between two adjacent film clamping members 413 is increased, and the two film clamping members 413 play a role in stretching the film 90; when the distance between the front rail plate 51 and the rear rail plate 52 is increased, for example, the included angle between two adjacent connecting rods 430 is correspondingly decreased, so that the distance between two adjacent film clamping members 413 is decreased, and the two film clamping members 413 play a role in shrinking the film 90.

Specifically, the two first rollers 412 are symmetrically disposed on both sides of the front rail plate 51 and can roll along the side surface of the front rail plate 51. The two second rollers 422 are symmetrically disposed on two sides of the rear rail plate 52 and can roll along the side surface of the rear rail plate 52. Therefore, the operation stability can be improved, and the operation failure rate is low.

Further, referring to fig. 6 and 8, the first moving assembly 410 further includes a third roller 414 rotatably disposed on the front moving seat 411. The third roller 414 is disposed on the top surface of the front rail plate 51 and can roll along the top surface of the front rail plate 51. In this way, when the film stretching chain clamp assembly runs on the track 50, the third roller 414 of the first moving assembly 410 rolls along the top surface of the front track plate 51, the third roller 414 plays a role of supporting the front moving seat 411, so that the first moving assembly 410 can rapidly run on the front track plate 51, and in addition, the two first rollers 412 of the first moving assembly 410 synchronously move along the two side surfaces of the front track plate 51, so as to play a role of positioning the first moving assembly 410, and thus the first moving assembly 410 can stably run on the front track plate 51.

In one embodiment, the second moving assembly 420 further includes a fourth roller 423 rotatably disposed on the rear moving base 421. The fourth roller 423 is disposed on the top surface of the rear rail plate 52 and can roll along the top surface of the rear rail plate 52. In this way, when the film stretching chain clamp assembly runs on the rail 50, similarly, the fourth roller 423 of the second moving assembly 420 rolls along the top surface of the rear rail plate 52, and the fourth roller 423 plays a role of supporting the rear moving seat 421, so that the second moving assembly 420 can run on the rear rail plate 52 quickly. In addition, the two second rollers 422 of the second moving assembly 420 move along the two sides of the rear rail plate 52 synchronously, so as to position the second moving assembly 420, and thus, the second moving assembly 420 can stably run on the rear rail plate 52.

In one embodiment, referring to fig. 6 to 8, the connecting rod 430 includes more than two link plates 431. One end of the link plate 431 is rotatably connected to the front moving seat 411, and the other end of the link plate 431 is connected to the rear moving seat 421. The link plates 431 are respectively disposed at both side surfaces of the first roller 412 adjacent to the rear rail plate 52, and the link plates 431 are respectively disposed at both side surfaces of the second roller 422 adjacent to the front rail plate 51. Thus, the rotatable link plates 431 are disposed on both sides of the first roller 412 adjacent to the rear track plate 52, and when a large force is applied, the supporting force of the link plates 431 on both sides of the first roller 412 is utilized to counteract the unidirectional deformation, thereby greatly improving the pressure resistance of the bearing. Similarly, the rotatable chain plates 431 are arranged on both sides of the second roller 422 close to the front track plate 51, and when a large acting force is applied, the supporting force of the chain plates 431 on both sides of the second roller 422 is utilized to counteract the unidirectional deformation, so that the pressure resistance of the bearing is greatly improved.

It is understood that the first moving assembly 410 and the second moving assembly 420 are alternately arranged, that is, the first moving assembly 410 is adjacent to two second moving assemblies 420, the second moving assembly 420 is adjacent to two first moving assemblies 410, the first moving assembly 410 is exemplified by the first moving assembly 410, the first moving assembly 410 is required to be rotatably connected with one of the adjacent second moving assemblies 420 through one connecting rod 430, and the first moving assembly 410 is also required to be rotatably connected with the other adjacent second moving assembly 420 through the other connecting rod 430, so that the first moving assembly 410 is connected with two connecting rods 430, and thus, more than four link plates 431 are rotatably connected with the first moving assembly 410. Similarly, more than four link plates 431 are rotatably connected to the second moving assembly 420.

Further, referring to fig. 6 to 8, a rotation axis center line of the first roller 412 close to the rear rail plate 52 and a rotation axis center line of one end of the link plate 431 on the front moving seat 411 are arranged in a collinear manner; the center line of the rotation shaft of the second roller 422 adjacent to the front rail plate 51 is arranged in line with the center line of the rotation shaft of the other end of the link plate 431 on the rear moving seat 421. In this way, a force point of the first moving assembly 410 is concentrated on the central line of the rotating shaft of the first roller 412, and a force part of the second moving assembly 420 is concentrated on the central line of the rotating shaft of the second roller 422, which can achieve more stable and reliable operation.

Further, the link plate 431 of the front moving seat 411 and the first roller 412 adjacent to the rear rail plate 52 are disposed on the same rotating shaft. The link plate 431 of the rear moving seat 421 is disposed on the same rotation shaft as the second roller 422 adjacent to the front rail plate 51.

In one embodiment, referring to fig. 6 to 8, the number of the link plates 431 of the link 430 is two, and the thickness of the link plates 431, the thickness of the first roller 412, and the thickness of the second roller 422 are the same. In two adjacent first moving assemblies 410, the number of the link plates 431 respectively arranged on the upper and lower sides of the first roller 412 of one of the first moving assemblies 410 is two, and the number of the link plates 431 respectively arranged on the upper and lower sides of the first roller 412 of the other first moving assembly 410 is three and one; in two adjacent second moving assemblies 420, the number of the link plates 431 respectively arranged on the upper and lower sides of the second roller 422 of one of the second moving assemblies 420 is two, and the number of the link plates 431 respectively arranged on the upper and lower sides of the second roller 422 of the other second moving assembly 420 is three and one. In this way, the first rollers 412 of two adjacent first moving assemblies 410 can be arranged in a staggered manner, and the second rollers 422 of two adjacent second moving assemblies 420 can be arranged in a staggered manner.

In one embodiment, referring to fig. 6 to 8, the front moving seat 411 and the rear moving seat 421 are each a body in an "i" shape, a concave opening 4111 of one side of the front moving seat 411 facing the rear track plate 52 is provided with one end of two chain plates 431 arranged in an overlapping manner, and a concave opening 4211 of one side of the rear moving seat 421 facing the front track plate 51 is provided with the other end of two chain plates 431 arranged in an overlapping manner; the two first rollers 412 on the bottom surface of the front movable seat 411 are located at the same height position, and the two second rollers 422 on the bottom surface of the rear movable seat 421 are located at the same height position; the bottom surface of the front moving seat 411 is provided with a first roller 412 and one end of two link plates 431 in an overlapping manner, and the bottom surface of the rear moving seat 421 is provided with a second roller 422 and the other end of two link plates 431 in an overlapping manner.

The first roller 412 of the bottom surface of one of the front moving seats 411 is located above two of the link plates 431, and the first roller 412 of the bottom surface of the other adjacent front moving seat 411 is located between the two link plates 431. Further, in order to realize that the two first rollers 412 on the bottom surface of the other front moving seat 411 are located at the same height position, a cushion block 4113 is disposed on a side of the bottom surface of the front moving seat 411 away from the rear track plate 52, the thickness of the cushion block 4113 is the same as that of the link plate 431, and the first roller 412 on the front moving seat 411 away from the rear track plate 52 is rotatably mounted on the cushion block 4113.

The second roller 422 of the bottom surface of one of the rear movable seats 421 is located above two of the link plates 431, and the second roller 422 of the bottom surface of the other adjacent rear movable seat 421 is located between two of the link plates 431. Further, in order to realize that the two second rollers 422 on the bottom surface of the other rear movable seat 421 are located at the same height position, a cushion block 4212 is disposed on a side of the bottom surface of the rear movable seat 421 away from the front rail plate 51, the thickness of the cushion block 4212 is the same as that of the link plate 431, and the second roller 422 on the rear movable seat 421 away from the front rail plate 51 is rotatably mounted on the cushion block 4212.

In one embodiment, referring to fig. 6 to 8, the first rollers 412 of two adjacent first moving assemblies 410 are disposed in a staggered manner, and the second rollers 422 of two adjacent second moving assemblies 420 are disposed in a staggered manner. In this way, when the distance between the front track plate 51 and the rear track plate 52 is increased, the included angle between two adjacent connecting rods 430 is correspondingly decreased, and because the first rollers 412 of two adjacent first moving assemblies 410 are arranged in a staggered manner, the included angle between two adjacent connecting rods 430 can be decreased, which is beneficial to the distance between two adjacent film clamping members 413 being smaller; in addition, under a certain width space of the chain clamp 40, the first roller 412 and the second roller 422 with larger diameters can be configured, so that the physical sizes of the stress components including the first roller 412 and the second roller 422, such as the connecting rod 430 shaft, the first roller 412 and the second roller 422, and the like are increased, and the mechanical strength of the mechanism is effectively improved.

Further, referring to fig. 6 to 8, the front track plate 51 and the rear track plate 52 are both plate-shaped, the wheel surfaces of the two first rollers 412 are respectively attached to two plate surfaces of the front track plate 51, and the wheel surfaces of the two second rollers 422 are respectively attached to two plate surfaces of the rear track plate 52. As described above, when the first moving unit 410 moves along the front rail plate 51, the wheel surface of the first roller 412 runs on the plate surface of the front rail plate 51 in a rotating manner, and similarly, when the second moving unit 420 moves along the rear rail plate 52, the wheel surface of the second roller 422 runs on the plate surface of the rear rail plate 52 in a rotating manner, so that the operation stability can be improved and the operation failure rate is low.

Further, referring to fig. 6 to 8, the film stretching apparatus further includes a limiting member 60. The second moving assembly 420 further includes a fifth roller 424 rotatably disposed on the rear moving seat 421. The limiting member 60 is disposed along the rear rail plate 52 and above the rear moving seat 421, a wheel surface of the fifth roller 424 contacts with the limiting member 60 or a gap is formed therebetween, and the fifth roller 424 can roll along the limiting member 60. Thus, on one hand, the limiting member 60 can prevent the fifth roller 424 from tilting upward to cause the second moving assembly 420 to be separated from the front track plate 51, and can ensure that the second moving assembly 420 stably runs on the rear track plate 52; on the other hand, during the movement of the second moving assembly 420 along the rear rail plate 52, the fifth roller 424 can also roll along the limiting member 60, and the whole film stretching chain clamp assembly has better operation stability on the rear rail plate 52. That is, once the film stretching chain clamp assembly is slightly separated from the top surface of the guide rail, the fifth roller 424 presses against the restraining member 60 and rolls rapidly along the restraining member 60, thereby ensuring the film stretching chain clamp assembly to safely run along the existing track. Specifically, the stopper 60 is a stopper bar provided directly above the rear rail plate 52, and is provided corresponding to the rear rail plate 52.

Further, referring to fig. 6 to 8, the film clamping member 413 is rotatably disposed on the front moving seat 411, the front moving seat 411 is provided with a supporting plate 4112 protruding out of the front track plate 51, and a clamping surface of the film clamping member 413 cooperates with a plate surface of the supporting plate 4112 to clamp the film 90 to be processed. Specifically, the film clamping member 413 includes a clamping head 4131 and a handle 4132, the handle 4132 is rotatably disposed on the front moving seat 411, the handle 4132 is connected to the clamping head 4131, the rotation of the handle 4132 drives the clamping head 4131 to rotate, and the rotation of the clamping head 4131 can cooperate with the plate surface of the supporting plate 4112 to clamp the film 90 to be processed or loosen the film 90.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A drive assembly for a film stretching chain gripper, the drive assembly comprising:

the slow-speed fluted disc is used for driving a rear driving wheel of the chain clamp to move; and

the auxiliary fluted disc with the coaxial setting of slow speed fluted disc and synchronous operation, the auxiliary fluted disc is located the top of slow speed fluted disc, the diameter of auxiliary fluted disc is greater than the slow speed fluted disc, the number of teeth of auxiliary fluted disc with the number of teeth of slow speed fluted disc is the same, the auxiliary fluted disc is used for the drive the chain presss from both sides the removal.

2. The drive assembly of a film stretching chain clamp of claim 1, wherein the auxiliary toothed disc is adapted to contact the front drive wheel of the chain clamp to drive the front drive wheel in movement.

3. The drive assembly of a film stretching chain clamp of claim 1, wherein said auxiliary toothed disc is adapted to contact an auxiliary drive wheel mounted on a connecting rod of said chain clamp to drive said auxiliary drive wheel in movement.

4. The drive assembly of a film stretching chain clamp of claim 1, further comprising a drive motor, wherein a power output shaft of the drive motor is connected with the slow-speed fluted disc; the auxiliary fluted disc is fixedly arranged on the slow fluted disc.

5. The drive assembly of a film stretching chain clamp of claim 4, wherein the auxiliary toothed disc and the slow toothed disc are of an integral structure; or the auxiliary fluted disc is detachably connected with the slow fluted disc; or a hollow-out opening is formed in the middle of the auxiliary fluted disc.

6. A film stretching apparatus comprising a driving assembly of the film stretching chain clamp according to any one of claims 1 to 5, further comprising a rail and a chain clamp disposed on the rail; the track comprises a front track plate and a rear track plate which are arranged at intervals; the chain clamp comprises a plurality of first moving assemblies, a plurality of second moving assemblies and a plurality of connecting rods; the first moving assemblies are sequentially and movably arranged on a front track plate, the second moving assemblies are sequentially and movably arranged on a rear track plate, the first moving assemblies and the second moving assemblies are alternately arranged, each first moving assembly comprises a front moving seat moving along the front track plate, a film clamping piece arranged on the front moving seat and a front driving wheel arranged on the front moving seat, and each second moving assembly comprises a rear moving seat moving along the rear track plate and a rear driving wheel arranged on the rear moving seat;

7. The film stretching apparatus as claimed in claim 6, further comprising an inlet platform, an outlet platform and a fast-toothed disc; the number of the inlet platforms, the number of the outlet platforms, the number of the tracks and the number of the chain clamps are two, the number of the fast fluted discs is more than two, and the number of the slow fluted discs is two; the tracks are annular tracks, and the two chain clamps are arranged on the two tracks in a one-to-one correspondence manner; one of said entrance platforms and one of said exit platforms are adapted to receive one of said tracks, and the other of said entrance platforms and the other of said exit platforms are adapted to receive the other of said tracks; and each inlet platform is provided with a fast fluted disc and a slow fluted disc at intervals, and each outlet platform is provided with a fast fluted disc.

8. The film stretching apparatus as claimed in claim 6, wherein the first moving assembly further comprises two first rollers rotatably disposed on the front moving base, the two first rollers being respectively disposed at both sides of the front rail plate and capable of rolling along the side surfaces of the front rail plate; the second moving assembly further comprises two second rollers which are rotatably arranged on the rear moving seat, and the two second rollers are respectively arranged on two sides of the rear track plate and can roll along the side face of the rear track plate.

9. The film stretching apparatus as claimed in claim 8, wherein the first moving assembly further comprises a third roller rotatably disposed on the front moving base, the third roller being disposed on the top surface of the front rail plate and being capable of rolling along the top surface of the front rail plate; the second moving assembly further comprises a fourth roller which is rotatably arranged on the rear moving seat, and the fourth roller is arranged on the top surface of the rear track plate and can roll along the top surface of the rear track plate.

10. The film stretching apparatus as claimed in claim 8, wherein said connecting rod comprises two or more link plates, one end of said link plate being rotatably connected to said front movable base, and the other end of said link plate being connected to said rear movable base; the two side faces of the first idler wheels, close to the rear track plate, are respectively provided with the chain plates, and the two side faces of the second idler wheels, close to the front track plate, are respectively provided with the chain plates.