CN114889877A

CN114889877A - Welding mechanism

Info

Publication number: CN114889877A
Application number: CN202210634579.1A
Authority: CN
Inventors: 何瑜华; 姜水波
Original assignee: Zhejiang Weipai Packaging Equipment Co ltd
Current assignee: Zhejiang Weipai Packaging Equipment Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-08-12

Abstract

The invention relates to the technical field of packing machines, and discloses a welding mechanism which comprises a rack, a rotary power shaft and a shifting block, wherein a rotary driving mechanism is arranged between the rotary power shaft and the shifting block, one side of the rack is provided with a base, the upper end of the base extends to form a guide sleeve, a sliding sleeve is arranged in the guide sleeve in a sliding manner, a vibrating rod is arranged in the sliding sleeve, the upper end of the vibrating rod is rotatably connected with the sliding sleeve, the upper end of the sliding sleeve is rotatably provided with a first connecting assembly, one end of the shifting block is rotatably provided with a second connecting assembly, the middle part of the first connecting assembly is provided with a rotating fulcrum, and the side surface of the base is provided with a driving assembly; the lower extreme of vibrating arm is fixed with the upper fusion fishplate bar, and the downside that lies in the upper fusion fishplate bar in the frame is fixed with lower fusion fishplate bar, is equipped with the elasticity piece that resets on the vibrating arm. The invention has the advantages of compact structure and good stability.

Description

Welding mechanism

Technical Field

The invention relates to the technical field of packaging machines, in particular to a welding mechanism.

Background

The hand-held packer is used for packing PET or PP strapping. The inside of the welding mechanism is used for carrying out friction heating on the strapping tape to realize the hot melt adhesion of the strapping tape. The current welding mechanism generally adopts a rotating mode to compress a strapping tape, and the strapping tape is rotated and reset after hot melting connection. For example, chinese patent No. 2017217290710 discloses a welding apparatus which is complicated in structure, requires manual pressing, is inconvenient to use, and has poor stability.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a welding mechanism with compact structure and good stability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a welding mechanism comprises a rack, a rotary power shaft and a shifting block rotatably connected with the rack, wherein a rotary driving mechanism used for driving the shifting block to rotate and position is arranged between the rotary power shaft and the shifting block, a base is arranged on one side of the rack, a guide sleeve is formed by extending the upper end of the base, a sliding sleeve is arranged in the guide sleeve in a sliding mode, a vibrating rod is arranged in the sliding sleeve, the upper end of the vibrating rod is rotatably connected with the sliding sleeve, a first connecting assembly is rotatably arranged at the upper end of the sliding sleeve, a second connecting assembly is rotatably arranged at one end of the shifting block, the first connecting assembly is rotatably connected with the second connecting assembly, a rotating fulcrum is arranged in the middle of the first connecting assembly, and a driving assembly which is driven by the rotary power shaft and used for driving the vibrating rod to vibrate is arranged on the side face of the base; the lower extreme of vibrating arm is fixed with the upper welding plate, and the downside of upper welding plate is equipped with down the welding plate, be equipped with the elasticity piece that resets on the vibrating arm.

The part of the strapping tape to be welded is arranged between the upper welding plate and the lower welding plate, the rotating power shaft rotates to drive the shifting block to rotate, the shifting block drives the sliding sleeve (vibrating rod) to move downwards through the first connecting assembly and the second connecting assembly to compress the strapping tape, then the driving assembly drives the vibrating rod to move rapidly back and forth (vibrate), so that the strapping tapes are connected together in a friction and hot melting manner, the rotating driving mechanism drives the sliding sleeve to ascend after welding, and the elastic reset piece assists the sliding sleeve to ascend and reset; this kind of butt fusion mechanism arranges the vibrating arm in the base, and the structure is compacter, and the mode that the vibrating arm passes through the oscilaltion compresses tightly the strapping in addition, and the decline of vibrating arm, rise are more stable, difficult jamming.

Preferably, the driving assembly is an eccentric shaft, a driven wheel is arranged at the outer end of the eccentric shaft, a driving wheel is arranged on the rotating power shaft, and a transmission belt is arranged between the driving wheel and the driven wheel; the vibrating rod is provided with a long slotted hole, the inner end of the eccentric shaft extends into the long slotted hole, and when the eccentric shaft rotates, the vibrating rod vibrates forwards and backwards. The rotation of the eccentric shaft drives the vibrating rod to vibrate back and forth.

Preferably, the inner end of the eccentric shaft is provided with a bearing matched with the slotted hole. The bearing reduces the friction between the eccentric shaft and the long slotted hole.

Preferably, the rotary driving mechanism comprises a first gear and a second gear which are arranged on the rotary power shaft, the shifting block is provided with a first arc-shaped rack meshed with the first gear and a second arc-shaped rack meshed with the second gear, and the first gear is connected with the rotary power shaft in a unidirectional rotation manner; in the initial state, the sliding sleeve is positioned at the uppermost end of the guide sleeve, the first gear is meshed with the first arc-shaped rack, the second gear is meshed with the second arc-shaped rack, and the second gear is separated from the second arc-shaped rack when the rotating power shaft drives the shifting block to rotate through the second gear so that the guide sleeve moves downwards to the limit position.

Preferably, a limiting block is arranged on one side of the shifting block, and a limiting seat for limiting the limiting block is arranged on the rack; when the limiting block is abutted against the limiting seat, the sliding sleeve descends to the limiting position.

Preferably, the shifting block is rotatably connected with the rack through a pin shaft A, the second connecting assembly comprises a connecting rod body and connecting seats arranged at two ends of the connecting rod body, at least one connecting seat is slidably connected with the connecting rod body, a pressure spring is arranged on the connecting rod body, the connecting seat at the upper end of the connecting rod body is rotatably connected with the first connecting assembly through a pin shaft B, and the connecting seat at the lower end of the connecting rod body is rotatably connected with the shifting block through a pin shaft C; when the limiting block is abutted to the limiting seat, the center of the pin shaft C is positioned at the outer side of the central connecting line of the pin shaft A and the pin shaft B and faces to one side where the limiting block is positioned. The vibrating arm vibrates the butt fusion in-process around can receiving an upward reaction force, and the vibration that this reaction force produced can be offset to the pressure spring, and simultaneously, the setting up of round pin axle C's position makes the component direction of reaction force be located this one side of stopper, ensures the vibrating arm vibration in-process, and the shifting block is in stable state (the shifting block can not take place to deflect).

Preferably, the driving wheel is connected with the rotating power shaft in a unidirectional rotating mode, and the unidirectional rotating direction of the driving wheel is opposite to the unidirectional rotating direction of the first gear. After hot melting is finished, the rotating power shaft rotates reversely, the driving wheel cannot drive the eccentric shaft to rotate at the moment, and the first gear drives the shifting block to reset under the action of the rotating power shaft.

Preferably, a sealing assembly is arranged at the lower end of the vibrating rod in the base, and the lower end of the vibrating rod penetrates through the sealing assembly. The sealing component plays a role in sealing, and prevents external impurities, dust (more dust is contained in the environment when powdery materials are packaged) and the like from entering the base.

Preferably, the sealing assembly comprises a sealing sleeve seat and a sealing sleeve, and the sealing sleeve seat is connected with the base through a bolt. The sealing sleeve can prevent the vibrating rod from directly colliding with the base while sealing.

Preferably, a cutting knife is disposed on one side of the upper welding plate. When the upper welding plate presses the strapping tape downwards, the cutter cuts off the strapping tape synchronously.

Therefore, the invention has the advantages of compact structure and good stability. Simultaneously, the vibrating rod is sealed in the base, the dustproof effect is good, and the vibrating rod works more stably.

Drawings

FIG. 1 is a schematic diagram of a structure of the present invention.

Fig. 2 is a schematic structural view of fig. 1 with the frame and the base removed.

Fig. 3 is another view of fig. 1.

Fig. 4 is an exploded view of the present invention.

Fig. 5 is a schematic diagram of an initial state of the dial block.

Fig. 6 is a schematic structural view in a hot-melt state.

In the figure: the welding machine comprises a rack 1, a base 100, a guide sleeve 101, a limiting seat 102, a rotating power shaft 2, a shifting block 3, a first arc-shaped rack 30, a second arc-shaped rack 31, a limiting block 32, a motor 4, a rotating driving mechanism 5, a first gear 50, a second gear 51, a sliding sleeve 6, a bushing 60, a vibrating rod 7, a long slotted hole 70, a first connecting assembly 8, a second connecting assembly 9, a connecting rod body 90, a connecting seat 91, a pressure spring 92, an eccentric shaft 10, a driven wheel 11, a driving wheel 12, a driving belt 13, a bearing 14, an upper welding plate 15, a cutter 150, a lower welding plate 16, an elastic resetting piece 17, a pin shaft A18, a pin shaft B19, a pin shaft C20, a sealing assembly 21, a sealing sleeve seat 210 and a sealing sleeve 211.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description below:

a welding mechanism as shown in fig. 1-6, which comprises a frame 1, a rotary power shaft 2, and a shifting block 3 rotatably connected with the frame, wherein a motor 4 is arranged on the frame, and the rotary power shaft 2 is a motor shaft or is driven by the motor; a rotary driving mechanism 5 for driving the shifting block to rotate and position is arranged between the rotary power shaft 2 and the shifting block, one side of the rack 1 is provided with a base 100, the upper end of the base 100 extends to form a guide sleeve 101, a sliding sleeve 6 is arranged in the guide sleeve 101 in a sliding manner, a bushing 60 is arranged between the inner wall of the guide sleeve and the sliding sleeve, the bushing is fixed in the guide sleeve, and the sliding sleeve slides in the bushing; a vibrating rod 7 is arranged in the sliding sleeve 6, the upper end of the vibrating rod 7 is rotatably connected with the sliding sleeve 6, a first connecting assembly 8 is rotatably arranged at the upper end of the sliding sleeve 6, a second connecting assembly 9 is rotatably arranged at one end of the shifting block 3, the first connecting assembly is rotatably connected with the second connecting assembly, a rotating fulcrum is arranged at the middle part of the first connecting assembly, a driving assembly which is driven by a rotating power shaft and used for driving the vibrating rod to vibrate is arranged on the side surface of the base 100, the driving assembly is an eccentric shaft 10, a driven wheel 11 is arranged at the outer end of the eccentric shaft 10, a driving wheel 12 is arranged on the rotating power shaft 2, and a driving belt 13 is arranged between the driving wheel and the driven wheel; the vibrating rod 7 is provided with a long slotted hole 70, the inner end of the eccentric shaft 10 is provided with a bearing 14 matched with the long slotted hole, and when the eccentric shaft rotates, the vibrating rod vibrates back and forth; the lower extreme of vibrating arm 7 is fixed with welding plate 15 on, and one side of going up welding plate is equipped with cutter 150, and the downside of going up welding plate is equipped with welding plate 16 down, is equipped with elasticity piece 17 that resets on the vibrating arm, and the elasticity piece that resets in this embodiment is the spring.

As shown in fig. 3 and 4, the rotary driving mechanism 5 includes a first gear 50 and a second gear 51 which are arranged on the rotary power shaft, a first arc-shaped rack 30 which is meshed with the first gear and a second arc-shaped rack 31 which is meshed with the second gear are arranged on the shifting block 3, and the first gear is connected with the rotary power shaft in a unidirectional rotation manner; as shown in fig. 5, in an initial state, the sliding sleeve 6 is located at the uppermost end of the guide sleeve 101, the first gear is engaged with the first arc-shaped rack, the second gear is engaged with the second arc-shaped rack, and the rotating power shaft 2 drives the shifting block to rotate (counterclockwise in fig. 5) through the second gear, so that when the guide sleeve moves downward to the limit position, the second gear is separated from the second arc-shaped rack. The driving wheel is connected with the rotating power shaft in a unidirectional rotating mode, the first gear and the driving wheel rotate in a unidirectional mode through the unidirectional rotating bearing, and the unidirectional rotating direction of the driving wheel is opposite to that of the first gear. As shown in fig. 5, when the rotary driving shaft rotates clockwise, the driving wheel rotates and the second gear is driven by the rotary driving shaft to rotate, and the first gear and the rotary driving shaft are in a free state; as shown in fig. 6, when the rotating driving shaft rotates counterclockwise, the first gear is driven by the rotating driving shaft to rotate counterclockwise synchronously, and the driving wheel and the rotating driving shaft are in a free state, and the driving wheel cannot drive the driven wheel to rotate.

As shown in fig. 4 and 6, a limit block 32 is arranged on one side of the shifting block 3, and a limit seat 102 for limiting the limit block is arranged on the rack 1; when the limiting block is abutted against the limiting seat, the sliding sleeve descends to the limiting position. The shifting block 3 is rotatably connected with the rack through a pin shaft A18, the second connecting assembly 9 comprises a connecting rod body 90 and connecting seats 91 arranged at two ends of the connecting rod body, at least one connecting seat is slidably connected with the connecting rod body, in the embodiment, the connecting seat positioned at the upper end of the connecting rod body is slidably connected with the connecting rod body, a pressure spring 92 is arranged on the connecting rod body, the connecting seat at the upper end of the connecting rod body is rotatably connected with the first connecting assembly through a pin shaft B19, and the connecting seat at the lower end of the connecting rod body is rotatably connected with the shifting block 3 through a pin shaft C20; when the limiting block is abutted to the limiting seat, the center of the pin shaft C is positioned at the outer side of the central connecting line of the pin shaft A and the pin shaft B and faces to one side where the limiting block is positioned.

As shown in fig. 4, a sealing assembly 21 is provided in the base 100 at a lower end of the vibration rod, and the lower end of the vibration rod passes through the sealing assembly; the seal assembly 21 includes a seal cartridge seat 210, a seal cartridge 211, which is bolted to the base.

The principle of the invention is as follows with reference to the attached drawings: as shown in fig. 5, in an initial state, the sliding sleeve is located at the limit position of the upper end of the guide sleeve, the first gear is meshed with the first arc-shaped rack, the second gear is meshed with the second arc-shaped rack, the upper welding plate and the lower welding plate are in a separated state, and a part to be welded of the strapping tape is placed between the upper welding plate and the lower welding plate; the rotating power shaft rotates clockwise to drive the second gear and the driving wheel to rotate (the first gear and the rotating driving shaft are in a free state), the shifting block rotates to a state shown in the figure 6 under the action of the second gear, at the moment, the second gear is separated from the second arc-shaped rack, the limiting block is abutted to the limiting seat, the first gear and the first rack are kept in a meshed state, the vibrating rod descends, the upper welding plate moves downwards to compress the strapping tape, the driving wheel rotates clockwise to drive the eccentric shaft to rotate, so that the vibrating rod vibrates in a reciprocating manner to realize hot melting, after the hot melting of the strapping tape is finished, the rotating driving shaft rotates anticlockwise, at the moment, the driving wheel stops rotating, the first gear drives the shifting block to rotate to an initial state shown in the figure 5, the vibrating rod ascends to reset, and the elastic reset piece assists the sliding sleeve to ascend to reset; this kind of butt fusion mechanism arranges the vibrating arm in the base, and the structure is compacter, and the mode that the vibrating arm passes through the oscilaltion compresses tightly the strapping in addition, and the decline of vibrating arm, rise are more stable, difficult jamming.

In the description of the present invention, it should be understood that directions or positional relationships indicated by upper, lower, left, right, inner end, outer end, one end, the other end, etc. are based on the directions or positional relationships shown in the drawings, and are only for the sake of clarity to describe the technical solutions of the present invention, and do not indicate or imply that the indicated devices or elements must have specific directions, be configured and operated in specific directions, and are not to be construed as limiting the present invention.

The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.

Claims

1. A welding mechanism comprises a rack, a rotary power shaft and a shifting block rotatably connected with the rack, wherein a rotary driving mechanism used for driving the shifting block to rotate and position is arranged between the rotary power shaft and the shifting block; the lower extreme of vibrating arm is fixed with the upper fusion fishplate bar, the downside of upper fusion fishplate bar is equipped with down the fusion fishplate bar, be equipped with the elasticity piece that resets on the vibrating arm.

2. The fusion splicing mechanism of claim 1, wherein the drive assembly is an eccentric shaft, a driven pulley is disposed at an outer end of the eccentric shaft, a driving pulley is disposed on the rotary power shaft, and a transmission belt is disposed between the driving pulley and the driven pulley; the vibrating rod is provided with a long slotted hole, the inner end of the eccentric shaft extends into the long slotted hole, and when the eccentric shaft rotates, the vibrating rod vibrates.

3. A fusion splice arrangement according to claim 2, wherein the inner end of the eccentric shaft is provided with a bearing which engages the slotted aperture.

4. The fusion mechanism of claim 1, wherein the rotary drive mechanism comprises a first gear and a second gear disposed on the rotary power shaft, the paddle having a first arcuate rack engaged with the first gear and a second arcuate rack engaged with the second gear, the first gear being in unidirectional rotational connection with the rotary power shaft; in the initial state, the sliding sleeve is positioned at the uppermost end of the guide sleeve, the first gear is meshed with the first arc-shaped rack, the second gear is meshed with the second arc-shaped rack, and the second gear is separated from the second arc-shaped rack when the rotating power shaft drives the shifting block to rotate through the second gear so that the guide sleeve moves downwards to the limit position.

5. The welding mechanism of claim 4, wherein a stopper is disposed on one side of the pusher, and a stopper seat for limiting the stopper is disposed on the frame; when the limiting block is abutted against the limiting seat, the sliding sleeve descends to the limiting position.

6. A fusion splicing mechanism according to claim 5, wherein the pusher block is pivotally connected to the frame by a pin A, the second connecting member comprises a connecting rod body, connecting seats provided at both ends of the connecting rod body, at least one of the connecting seats is slidably connected to the connecting rod body, a compression spring is provided on the connecting rod body, the connecting seat at the upper end of the connecting rod body is pivotally connected to the first connecting member by a pin B, and the connecting seat at the lower end of the connecting rod body is pivotally connected to the pusher block by a pin C; when the limiting block is abutted against the limiting seat, the center of the pin shaft C is positioned on the outer side of the center connecting line of the pin shaft A and the pin shaft B and faces to one side where the limiting block is positioned.

7. The fusion splicing mechanism of claim 4, wherein the drive wheel is rotatably coupled to the rotatable power shaft in a unidirectional direction, the unidirectional rotation of the drive wheel being in a direction opposite to the unidirectional rotation of the first gear.

8. The fusion splicing mechanism of claim 1 wherein a seal member is disposed in the base at a lower end of the vibratory rod, the lower end of the vibratory rod extending through the seal member.

9. A fusion splice assembly according to claim 8, wherein the seal assembly includes a seal housing and a seal cartridge, the seal housing being bolted to the base.

10. The fusion mechanism of claim 1, wherein said upper fusion plate is provided with a cutter on one side.