阅读说明：本技术 一种改进的自动锁盖的抽真空封口机 (Improved vacuum-pumping sealing machine with automatic cover locking function ) 是由 曹东华 廖建新 于 2021-06-22 设计创作，主要内容包括：本发明公开了一种改进的自动锁盖的抽真空封口机,包括自动锁盖机构包括锁盖驱动机构、至少两个锁盖槽、与每个锁盖槽相对应的锁盖滑块,锁盖槽和锁盖滑块卡扣配合,锁盖驱动机构与锁盖滑块传动配合,在锁盖滑块相对锁盖槽移动时上盖具有向下的位移；抽真空装置包括抽真空腔室和抽气组件,抽真空腔室设置于抽真空封口机的前侧,抽气组件安装于下座的前侧的顶部,抽气组件活动设置有一抽气管,抽气管沿竖直方向设置,抽真空泵与抽真空腔室和/或抽气组件连接；抽真空腔室设置有泄压口,上盖和/或下座设置有泄压机构,泄压机构与泄压口密封配合。锁盖无需预压合,松盖无需手动解除锁扣,泄压力大,两种抽气装置结合,适应性强,结构简单,成本低。(The invention discloses an improved vacuumizing sealing machine for an automatic lock cover, which comprises an automatic lock cover mechanism, a sealing mechanism and a sealing mechanism, wherein the automatic lock cover mechanism comprises a lock cover driving mechanism, at least two lock cover grooves and a lock cover sliding block corresponding to each lock cover groove; the vacuumizing device comprises a vacuumizing cavity and an air extracting assembly, the vacuumizing cavity is arranged on the front side of the vacuumizing sealing machine, the air extracting assembly is arranged at the top of the front side of the lower seat, the air extracting assembly is movably provided with an air extracting pipe, the air extracting pipe is arranged along the vertical direction, and the vacuumizing pump is connected with the vacuumizing cavity and/or the air extracting assembly; the vacuum pumping chamber is provided with a pressure relief opening, the upper cover and/or the lower seat are/is provided with a pressure relief mechanism, and the pressure relief mechanism is in sealing fit with the pressure relief opening. The lock cover does not need to be pressed in advance, the lock catch does not need to be manually released when the cover is loosened, the pressure relief force is large, the two air exhaust devices are combined, the adaptability is strong, the structure is simple, and the cost is low.)

1. The utility model provides a vacuum pumping capper of modified automatic locking lid, including upper cover (1), lower seat (2) with upper cover (1) rear side articulated, an automatic locking lid mechanism and a control circuit for locking upper cover (1) and lower seat (2), with control circuit electric connection's evacuation pump (3), upper cover (1) and/or lower seat (2) are provided with the electricity and connect in control circuit's evacuating device, the front side of upper cover (1) and/or lower seat (2) is provided with heat-seal assembly (5) that the electricity is connected in control circuit, its characterized in that: the automatic cover locking mechanism comprises a cover locking driving mechanism, at least two cover locking grooves (81) and a cover locking sliding block (82) corresponding to each cover locking groove (81), the cover locking grooves (81) are in snap fit with the cover locking sliding blocks (82), the cover locking driving mechanism is in transmission fit with the cover locking sliding blocks (82), and the upper cover (1) has downward displacement when the cover locking sliding blocks (82) move relative to the cover locking grooves (81);

the vacuumizing device comprises a vacuumizing cavity and an air extracting assembly, the vacuumizing cavity is arranged on the front side of the vacuumizing sealing machine, the air extracting assembly is arranged on the top of the front side of the lower seat (2), the air extracting assembly is movably provided with an air extracting pipe (71), the air extracting pipe (71) is arranged in the vertical direction, and the vacuumizing pump (3) is connected with the vacuumizing cavity and/or the air extracting assembly;

the vacuum pumping chamber is provided with a pressure relief opening (110), the upper cover (1) and/or the lower seat (2) are/is provided with a pressure relief mechanism, and the pressure relief mechanism is in sealing fit with the pressure relief opening (110).

2. An improved auto-capping vacuum extractor closure as claimed in claim 1, wherein: the cover locking groove (81) is provided with a high groove position, a low groove position and a chute, wherein the height of the low groove position is lower than that of the high groove position, the chute is connected between the high groove position and the low groove position, the high groove position is a clamping part (210) of the cover locking groove (81), the low groove position is a separating part (211) of the cover locking groove (81), and the cover locking sliding block (82) is separated from the cover locking groove (81) when the cover locking sliding block (82) moves to the separating part (211); when the locking cover sliding block (82) moves to the clamping part (210), the locking cover sliding block (82) is in snap fit with the locking cover groove (81).

3. An improved auto-capping vacuum extractor closure as claimed in claim 1, wherein: the locking cover driving mechanism comprises a locking cover transmission strip (831), a locking cover driving motor (832) and a transmission gear (833), a transmission shaft of the locking cover driving motor (832) is connected with the transmission gear (833), a rack is arranged at the bottom of the locking cover transmission strip (831), the locking cover transmission strip (831) is in toothed connection with the transmission gear (833) to realize that the locking cover driving motor (832) drives the locking cover transmission strip (831) to transversely move back and forth, and a locking cover sliding block (82) is fixedly installed on the top surface of the locking cover transmission strip (831).

4. An improved auto-capping vacuum extractor closure as claimed in claim 1, wherein: a locking block (212) extends from the upper part of the locking cover sliding block (82) to the front side of the vacuum-pumping sealing machine to form the locking cover sliding block (82) with an inverted L-shaped cross section,

the lower part of the locking block (212) is provided with an oblique angle which inclines upwards to form an upper guide surface, the inner end part of the locking cover groove (81) is provided with an oblique angle which inclines downwards to form a lower guide surface, when the bottom surface of the upper cover (1) is in abutting fit with the top surface of the lower seat (2), the upper guide surface is above the lower guide surface, and the upper guide surface is parallel to the lower guide surface.

5. An improved auto-capping vacuum extractor closure as claimed in claim 1, wherein: the bottom surface of the front side of the upper cover (1) is upwards sunken to form an upper vacuumizing groove (41), the top surface of the front side of the lower seat (2) is recessed downwards to form a lower vacuum groove (42) corresponding to the upper vacuum groove (41), the outer edge of the upper vacuum groove (41) and/or the lower vacuum groove (42) is provided with a circle of elastic sealing ring (6), the inner edge of the rear side of the lower vacuum groove (42) is provided with at least one baffle (43) in an upward protruding way, when the upper cover (1) is in press fit with the lower seat (2), the baffle (43) is inserted into the upper vacuumizing groove (41), the upper vacuumizing groove (41) and the lower vacuumizing groove (42) form a sealed vacuumizing chamber through the elastic sealing ring (6) in abutting fit, a pressure sensor (44) is installed inside the vacuumizing chamber, and the pressure sensor (44) is electrically connected with the control circuit.

6. An improved auto-capping vacuum extractor closure as claimed in claim 1, wherein: the air extraction assembly comprises an air extraction pipe (71) and an air pipe fixing seat (72), the air extraction pipe (71) is in a thin flat shape with a hollow interior, the air pipe fixing seat (72) is fixedly arranged at the rear side of the lower seat (2), the air extraction pipe (71) is exposed at the front side of the top surface of the lower seat (2), the air extraction pipe (71) and the air pipe fixing seat (72) are in rotary connection or sliding connection,

the air pipe fixing seat (72) comprises an air pipe sliding block (73) and an air pipe reset spring (77), the air pipe fixing seat (72) is provided with a sliding cavity (75), the air pipe sliding block (73) is inserted into the sliding cavity (75) and is in sliding connection with the air pipe fixing seat (72), and the tail part of the air suction pipe (71) is fixedly connected to the front end of the air pipe sliding block (73); one end of the air pipe reset spring (77) is propped against the rear end face of the air pipe sliding block (73), and the other end of the air pipe reset spring is propped against the bottom face of the sliding cavity (75);

trachea slider (73) are provided with an outer chamfer, and outer chamfer face (76) of outer chamfer is towards the outside, adjacent with trachea slider (73) locking closure slider (82) extend a ejector pad (821) towards trachea slider (73), and ejector pad (821) is provided with an interior chamfer, and interior chamfer face (822) of interior chamfer are towards the inboard, and interior chamfer face (822) are parallel with outer chamfer face (76), and when the evacuation, ejector pad (821) lateral shifting, interior chamfer face (822) and outer chamfer face (76) transmission fit to realize ejector pad (821) promotion exhaust tube (71) move along vertical direction.

7. An improved auto-capping vacuum extractor closure as claimed in claim 1, wherein: the front end of the exhaust pipe (71) is a front exhaust opening (711), the middle section of the exhaust pipe (71) is provided with at least one rear exhaust opening (712), and the rear exhaust opening (712) is positioned in the vacuum pumping chamber.

8. An improved auto-capping vacuum extractor closure as claimed in any one of claims 1 to 7, wherein: the pressure relief mechanism comprises a pressure relief transmission mechanism (120) and a sealing plate (124), the pressure relief transmission mechanism (120) is fixedly connected or in transmission connection with the sealing plate (124),

when the sealing plate (124) presses against the pressure relief opening (110), the sealing plate (124) is in sealing fit with the pressure relief opening (110),

when the sealing plate (124) is separated from the pressure relief opening (110), the pressure relief opening (110) is communicated with the atmosphere;

the pressure relief transmission mechanism (120) comprises a pressure relief seat (121), a pressure relief rod (122) and a reset spring (127), a seat cavity (123) is formed in the pressure relief seat (121), the pressure relief rod (122) is connected to the seat cavity (123) in a sliding mode, the sealing plate (124) is fixedly connected to the head of the pressure relief rod (122), the area of the sealing plate (124) is larger than the diameter of the pressure relief opening (110), the reset spring (127) is installed in the seat cavity (123), one end of the reset spring (127) is connected with the bottom of the seat cavity (123), the other end of the reset spring (127) is connected with the pressure relief rod (122), and the lock cover driving mechanism is in transmission connection with the pressure relief rod (122) so as to push and pull the sealing plate (124) to move back and forth towards the pressure relief opening (110);

the bottom surface of the pressure relief seat (121) is provided with a sliding groove (125), the sliding groove (125) is communicated with the seat cavity (123), the tail part of the pressure relief rod (122) is provided with a threaded hole, the threaded hole is in threaded connection with a push-pull bolt (126), the push-pull bolt (126) is perpendicular to the pressure relief rod (122) and is L-shaped, and the push-pull bolt (126) penetrates through the sliding groove (125) to be movably connected with the lock cover driving mechanism;

the lock cover transmission strip (831) is provided with a handle (131) in an L shape, the side face of the handle (131) is fixedly connected with the lock cover transmission strip (831), a pulling and connecting part (132) extends outwards from the front end of the bottom face of the handle (131), an arc-shaped clamping groove (133) facing the bottom opening of the seat cavity (123) is formed in the pulling and connecting part (132), and the push-pull bolt (126) is in hooking and matching with the clamping groove (133).

9. An improved auto-capping vacuum extractor closure as claimed in claim 8, wherein: the left side and the right side of the lower seat (2) are respectively provided with a travel touch switch (9), the travel touch switches (9) are electrically connected with the control circuit,

the locking cap drive bar (831) has an initial stop position, an intermediate stop position and an end stop position,

when the locking cover transmission strip (831) is positioned at the initial stop position, the locking cover transmission strip (831) is in trigger fit with the travel touch switch (9) at the left side,

when the locking cover transmission strip (831) is positioned at the tail end stop position, the locking cover transmission strip (831) is in trigger fit with the right stroke touch switch (9),

when the locking cover transmission strip (831) is in trigger fit with the middle touch switch (140), the locking cover transmission strip (831) stops at the middle stop position.

10. An improved auto-capping vacuum extractor closure as claimed in claim 9, wherein: the middle touch switch (140) comprises a stroke rod (141), a stroke spring (142) and a switch fixing seat (143), a fixing hole (144) is formed in the switch fixing seat (143), the tail of the stroke rod (141) is inserted into the fixing hole (144) and is in sliding connection with the switch fixing seat (143), a metal contact (145) is arranged at the head of the stroke rod (141), the diameter of the metal contact (145) is larger than that of the stroke rod (141), the stroke rod (141) is sleeved with the stroke spring (142), one end of the stroke spring (142) abuts against one side of the switch fixing seat (143), and the other end of the stroke spring abuts against the bottom surface of the metal contact (145)

Travel touch switch (9) include control part and elastic metal piece, control part with locking closure actuating mechanism electric connection, elastic metal piece set up in the control part with between locking closure drive strip (831), elastic metal piece's rear end fixed mounting is in the medial surface of control part, and the medial surface of control part is provided with a metal contact, when locking closure drive strip (831) removed the front end to elastic metal piece, touches metal contact at elastic metal piece's front end, and locking closure drive strip (831) contact and the front end of extrusion elastic metal piece and move towards metal contact.

Technical Field

The invention relates to the technical field of vacuumizing sealing machines, in particular to an improved vacuumizing sealing machine with an automatic cover locking function.

Background

The vacuum packaging product utilizes vacuum air pumping equipment to pump air out of the vacuum packaging bag, and then is matched with a hot melting device to carry out hot melting sealing at the opening of the vacuum packaging bag so as to achieve the purpose of vacuum sealing in the vacuum packaging bag, thereby keeping the freshness and the sanitation of food.

The existing vacuumizing sealing machine with an automatic cover locking function comprises an upper cover and a lower seat, wherein the rear side of the upper cover is hinged to the lower seat, a vacuumizing device and a heat-sealing assembly are arranged on the upper cover and/or the lower seat, and the upper cover and the lower seat are locked through an automatic cover locking mechanism; the existing automatic cover locking mechanism adopts a lock catch to slightly press and lock in advance, then the upper cover is tensioned downwards through a cover locking driving mechanism to achieve the purpose of locking, and when the cover is loosened, the upper cover can be opened only by manually releasing the lock catch, so that the operation is complex, and the cover locking force is small;

the existing vacuum-pumping devices have two types, the first type is: the exhaust pipe is inserted into the vacuum packaging bag for vacuumizing, and after vacuumizing is completed, the exhaust pipe is pulled out and hot-melt sealing is carried out; and the second method comprises the following steps: placing the bag opening of the vacuum packaging bag into a vacuumizing chamber, vacuumizing the vacuumizing chamber, so that air in the vacuum packaging bag is pumped into the vacuumizing chamber, and directly performing heat sealing after vacuumizing is completed; when the vacuumizing sealing machine with the first structure is used for vacuumizing the grain bag, the grain bag is not easy to seal due to the fact that the inner wall of the grain bag is supported by grains after being completely closed, air leakage is easy to occur, and therefore the vacuumizing effect is poor or the vacuumizing effect is failed; when the vacuumizing sealing machine with the second structure vacuumizes the smooth bag, the inner wall of the smooth bag is smooth, no exhaust pipe supports the smooth bag, and the bag opening is easy to adhere and seal, so that air in the smooth bag is not easy to extract, and the vacuumizing effect is poor.

After the evacuation capper of adopting second kind of structure accomplishes the evacuation, because the evacuation chamber is in the negative pressure, consequently still can't open the upper cover after automatic locking mechanism opens, still need carry out the pressure release to the evacuation chamber, just can open the upper cover, generally set up the blast pipe at the evacuation chamber, and add the solenoid valve on the blast pipe, open or close the solenoid valve through control circuit, make evacuation chamber intercommunication or isolated atmosphere, in order to realize pressure release and evacuation, this kind of pressure release structure is complicated, and is with high costs, the ooff valve dynamics of solenoid valve is limited, negative pressure when the evacuation chamber is too big, general small-size solenoid valve can't be opened, need to change bigger solenoid valve, occupy more spaces, lead to the evacuation capper volume too big, consequently, need improve.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an improved vacuumizing sealing machine with an automatic locking cover, which has the advantages of simple structure, low cost and more convenience in use.

In order to achieve the purpose, the invention adopts the technical scheme that: an improved vacuumizing sealing machine with an automatic locking cover comprises an upper cover, a lower seat, an automatic locking cover mechanism and a control circuit, wherein the lower seat is hinged with the rear side of the upper cover;

the vacuumizing device comprises a vacuumizing cavity and an air extracting assembly, the vacuumizing cavity is arranged on the front side of the vacuumizing sealing machine, the air extracting assembly is arranged at the top of the front side of the lower seat, the air extracting assembly is movably provided with an air extracting pipe, the air extracting pipe is arranged along the vertical direction, and the vacuumizing pump is connected with the vacuumizing cavity and/or the air extracting assembly;

the vacuum pumping chamber is provided with a pressure relief opening, the upper cover and/or the lower seat are/is provided with a pressure relief mechanism, and the pressure relief mechanism is in sealing fit with the pressure relief opening.

In a further technical scheme, the lock cover groove is provided with a high groove position, a low groove position with the height lower than that of the high groove position and an inclined groove connected between the high groove position and the low groove position, the high groove position is a clamping part of the lock cover groove, the low groove position is a separating part of the lock cover groove, and the lock cover sliding block is separated from the lock cover groove when the lock cover sliding block moves to the separating part; when the locking cover sliding block moves to the clamping part, the locking cover sliding block is matched with the locking cover groove in a clamping way.

In a further technical scheme, the lock cover driving mechanism comprises a lock cover transmission bar, a lock cover driving motor and a transmission gear, a transmission shaft of the lock cover driving motor is connected with the transmission gear, a rack is arranged at the bottom of the lock cover transmission bar, the lock cover transmission bar is in toothed connection with the transmission gear so as to drive the lock cover transmission bar to transversely reciprocate by the lock cover driving motor, and a lock cover sliding block is fixedly installed on the top surface of the lock cover transmission bar.

In a further technical scheme, a locking block extends from the upper part of the locking cover sliding block to the front side of the vacuumizing sealing machine to form the locking cover sliding block with an inverted L-shaped cross section,

the lower part of the locking block is provided with an oblique angle which inclines upwards to form an upper guide surface, the inner end part of the locking cover groove is provided with an oblique angle which inclines downwards to form a lower guide surface, when the bottom surface of the upper cover is matched with the top surface of the lower seat in an abutting mode, the upper guide surface is arranged above the lower guide surface, and the upper guide surface is parallel to the lower guide surface.

In a further technical scheme, the bottom surface of the front side of the upper cover is upwards sunken to form an upper vacuumizing groove, the top surface of the front side of the lower seat is downwards sunken to form a lower vacuumizing groove corresponding to the upper vacuumizing groove, the outer edge of the upper vacuumizing groove and/or the lower vacuumizing groove is provided with a circle of elastic sealing ring, the inner edge of the rear side of the lower vacuumizing groove is upwards convexly provided with at least one baffle, when the upper cover is in compression fit with the lower seat, the baffle is inserted into the upper vacuumizing groove, the upper vacuumizing groove and the lower vacuumizing groove form a sealed vacuumizing cavity by abutting against the elastic sealing ring, a pressure sensor is arranged inside the vacuumizing cavity, and the pressure sensor is electrically connected with a control circuit.

In a further technical scheme, the air exhaust component comprises an air exhaust pipe and an air pipe fixing seat, the air exhaust pipe is in a thin flat shape with a hollow interior, the air pipe fixing seat is fixedly arranged at the rear side of the lower seat, the air exhaust pipe is exposed at the front side of the top surface of the lower seat, the air exhaust pipe is in rotary connection or sliding connection with the air pipe fixing seat,

the air pipe fixing seat comprises an air pipe sliding block and an air pipe reset spring, the air pipe fixing seat is provided with a sliding cavity, the air pipe sliding block is inserted into the sliding cavity and is in sliding connection with the air pipe fixing seat, and the tail part of the exhaust pipe is fixedly connected to the front end of the air pipe sliding block; one end of the air pipe reset spring is abutted against the rear end face of the air pipe sliding block, and the other end of the air pipe reset spring is abutted against the bottom face of the sliding cavity.

The trachea slider is provided with an outer chamfer, and the outer chamfer face of outer chamfer is towards the outside, and the locking closure slider adjacent with the trachea slider extends a ejector pad towards the trachea slider, and the ejector pad is provided with an interior chamfer, and the interior chamfer face of interior chamfer is towards the inboard, and interior chamfer face is parallel with outer chamfer face, and when the evacuation, the ejector pad lateral shifting, interior chamfer face and outer chamfer face transmission fit to realize that the ejector pad promotes the exhaust pipe and remove along vertical direction.

In a further technical scheme, the front end of the exhaust pipe is a front exhaust opening, at least one rear exhaust opening is formed in the middle section of the exhaust pipe, and the rear exhaust opening is located in the vacuum pumping chamber.

In a further technical scheme, the pressure relief mechanism comprises a pressure relief transmission mechanism and a sealing plate, the pressure relief transmission mechanism is fixedly connected or in transmission connection with the sealing plate,

the sealing plate is in sealing fit with the pressure relief opening when the sealing plate is pressed against the pressure relief opening,

the pressure relief port is communicated with the atmosphere when the sealing plate is separated from the pressure relief port;

pressure release drive mechanism is including pressure release seat, pressure release pole and reset spring, the seat chamber has been seted up to the inside of pressure release seat, pressure release pole sliding connection in seat chamber, closing plate fixed connection is in pressure release pole's head, the area of closing plate is greater than the diameter of pressure release mouth, reset spring installs in the seat intracavity, the bottom in seat chamber is connected to reset spring one end, pressure release pole is connected to one end in addition, locking closure actuating mechanism is connected with the transmission of pressure release pole to realize push-and-pull closing plate toward returning the removal to pressure release mouth direction.

The bottom surface of the pressure relief seat is provided with a sliding groove, the sliding groove is communicated with the seat cavity, the tail part of the pressure relief rod is provided with a threaded hole, the threaded hole is in threaded connection with a push-pull bolt, the push-pull bolt is perpendicular to the pressure relief rod and is L-shaped, and the push-pull bolt penetrates through the sliding groove and is movably connected with the lock cover driving mechanism.

The locking closure driving strip is provided with the handle of L shape, the side and the locking closure driving strip fixed connection of handle, and the front end of the bottom surface of handle outwards extends one and draws and connect the portion, draws and connects the portion and offers the curved joint groove of bottom open-ended towards the seat chamber, and push-and-pull bolt and joint groove hook cooperation.

In a further technical scheme, the left side and the right side of the lower seat are respectively provided with a travel touch switch which is electrically connected with a control circuit,

the locking cap drive bar has an initial stop position, an intermediate stop position and a terminal stop position

When the locking cover transmission bar is positioned at the initial stop position, the locking cover transmission bar is in triggering fit with the travel touch switch at the left side,

when the locking cover transmission bar is positioned at the tail end stop position, the locking cover transmission bar is in triggering fit with the right stroke touch switch,

and when the locking cover transmission bar is in triggering fit with the middle touch switch, the locking cover transmission bar stops at the middle stop position.

In a further technical scheme, the middle touch switch comprises a stroke rod, a stroke spring and a switch fixing seat, a fixing hole is formed in the switch fixing seat, the tail of the stroke rod is inserted into the fixing hole and is in sliding connection with the switch fixing seat, a metal contact is arranged at the head of the stroke rod, the diameter of the metal contact is larger than that of the stroke rod, the stroke rod is sleeved with the stroke spring, one end of the stroke spring abuts against one side of the switch fixing seat, and the other end of the stroke spring abuts against the bottom surface of the metal contact

Travel touch switch includes control part and elastic metal piece, control part and locking closure actuating mechanism electric connection, elastic metal piece sets up between control part and locking closure driving strip, elastic metal piece's rear end fixed mounting is in the medial surface of control part, the medial surface of control part is provided with a metal contact, when the locking closure driving strip moves the front end to elastic metal piece, at the front end touching metal contact of elastic metal piece, the front end of locking closure driving strip contact and extrusion elastic metal piece moves towards the metal contact.

After adopting the structure, compared with the prior art, the invention has the advantages that:

1. the automatic cover locking mechanism drives the cover locking sliding block to move transversely through the cover locking driving mechanism and is matched with the cover locking groove in a buckling mode, automatic cover locking and cover loosening are achieved, locking force is strong, the structure is simple, cost is low, the longitudinal space of the vacuum sealing machine is saved, manual pressing is not needed, time and labor are saved, the vacuum sealing efficiency is improved, and meanwhile the vacuumizing success rate is improved;

2. the vacuum pumping chamber is provided with a pressure relief opening, the automatic cover locking mechanism pushes and pulls the pressure relief mechanism for plugging the pressure relief opening while locking and unlocking the cover, so that the pressure relief opening is closed or opened, the pressure relief of the vacuum pumping chamber is realized, an electromagnetic valve is not needed, the cost is reduced, the pressure relief structure is simplified, the volume of the vacuum pumping sealing machine is reduced, the automatic cover locking mechanism is linked with a pressure relief rod for plugging or opening, the reliability is high, and the pressure relief force is high;

3. with the combination of evacuation chamber and exhaust tube, can use polished surface bag and line bag to carry out the evacuation simultaneously, the suitability is stronger, has reduced the evacuation cost, and simple structure, and is with low costs.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

FIG. 3 is a schematic view of the locking cap drive bar of the present invention in an initial rest position.

FIG. 4 is a schematic view of the locking cap drive bar of the present invention in an intermediate rest position.

Fig. 5 is an enlarged view of a portion B of fig. 4.

FIG. 6 is a schematic view of the locking cap drive bar of the present invention in an end stop position.

Figure 7 is a schematic view of the structure of the pumping assembly of the present invention.

Fig. 8 is a schematic structural view of the pressure relief transmission mechanism of the present invention.

Fig. 9 is a schematic structural diagram of the intermediate touch switch according to the present invention.

Fig. 10 is a schematic structural view of the upper cover of the present invention.

Fig. 11 is a schematic view of the structure of the lockcover drive bar of the present invention.

In the figure:

1, covering the cover;

2, lower seat;

3, pumping a vacuum pump;

41 upper vacuum groove, 42 lower vacuum groove, 43 baffle, 44 pressure sensor;

5, heat sealing the assembly;

6, elastic sealing rings;

71 air exhaust pipe, 711 front air exhaust port, 712 rear air exhaust port, 72 air pipe fixing seat, 73 air pipe sliding block, 75 sliding cavity, 76 outer chamfer surface and 77 air pipe return spring;

81 locking cover grooves, 82 locking cover sliding blocks, 821 pushing blocks, 822 inner chamfer surfaces, 831 locking cover transmission bars, 832 locking cover driving motors, 833 transmission gears and 834 racks;

a 9-stroke touch switch;

110 pressure relief ports;

120 pressure relief transmission mechanism, 121 pressure relief seat, 122 pressure relief rod, 123 seat cavity, 124 sealing plate, 125 sliding groove, 126 push-pull bolt and 127 reset spring;

131 handles, 132 pull-connecting parts and 133 clamping grooves;

140 middle touch switch, 141 stroke rod, 142 stroke spring, 143 switch fixing seat, 144 fixing hole and 145 metal contact;

210 clamping part, 211 separating part and 212 locking block.

Detailed Description

The following are merely preferred embodiments of the present invention, and do not limit the scope of the present invention.

An improved vacuum sealing machine with automatic cover locking function, as shown in fig. 1 to fig. 11, comprises an upper cover 1, a lower base 2 hinged with the rear side of the upper cover 1, an automatic cover locking mechanism and a control circuit for locking the upper cover 1 and the lower base 2, a vacuum pump 3 electrically connected with the control circuit, wherein the upper cover 1 and/or the lower base 2 are provided with a vacuum pumping device electrically connected with the control circuit, and the front side of the upper cover 1 and/or the lower base 2 is provided with a heat sealing assembly 5 electrically connected with the control circuit, which is characterized in that: the automatic cover locking mechanism comprises a cover locking driving mechanism, at least two cover locking grooves 81 and a cover locking sliding block 82 corresponding to each cover locking groove 81, the cover locking grooves 81 are in snap fit with the cover locking sliding blocks 82, the cover locking driving mechanism is in transmission fit with the cover locking sliding blocks 82, and the upper cover 1 has downward displacement when the cover locking sliding blocks 82 move relative to the cover locking grooves 81;

the vacuumizing device comprises a vacuumizing cavity and an air extracting assembly, the vacuumizing cavity is arranged on the front side of the vacuumizing sealing machine, the air extracting assembly is arranged on the top of the front side of the lower seat 2, the air extracting assembly is movably provided with an air extracting pipe 71, the air extracting pipe 71 is arranged in the vertical direction, and the vacuumizing pump 3 is connected with the vacuumizing cavity and/or the air extracting assembly;

the vacuum chamber is provided with a pressure relief opening 110, and the upper cover 1 and/or the lower base 2 are/is provided with a pressure relief mechanism which is in sealing fit with the pressure relief opening 110.

Specifically, the cover-locking groove 81 is provided with a high groove position, a low groove position having a height lower than that of the high groove position, and a chute groove connected between the high groove position and the low groove position, the high groove position is a clamping part 210 of the cover-locking groove 81, the low groove position is a separating part 211 of the cover-locking groove 81, and the cover-locking slider 82 is separated from the cover-locking groove 81 when the cover-locking slider 82 moves to the separating part 211; the latch cover slide 82 snaps into engagement with the latch cover slot 81 when the latch cover slide 82 moves to the catch 210.

The locking cover groove 81 is provided with a clamping part 210 and a separating part 211, and when the locking cover is locked, the locking cover sliding block 82 moves from the separating part of the locking cover groove 81 to the clamping part 210; when the cover is opened, the cover locking sliding block 82 moves from the clamping part 210 of the cover locking groove 81 to the separating part 211, the separating part and the clamping part have height difference, the cover locking force is high, and the upper cover is not easy to break during vacuum pumping.

Specifically, the locking cover driving mechanism comprises a locking cover transmission strip 831, a locking cover driving motor 832 and a transmission gear 833, a transmission shaft of the locking cover driving motor 832 is connected with the transmission gear 833, a rack is arranged at the bottom of the locking cover transmission strip 831, the locking cover transmission strip 831 is in toothed connection with the transmission gear 833 so as to realize that the locking cover driving motor 832 drives the locking cover transmission strip 831 to transversely reciprocate, and the locking cover sliding block 82 is fixedly installed on the top surface of the locking cover transmission strip 831.

Specifically, a locking block 212 is extended from the upper part of the locking cap sliding block 82 to the front side of the vacuum-pumping sealing machine, so as to form the locking cap sliding block 82 with an inverted L-shaped cross section,

the lower part of the locking block 212 is provided with an upward inclined angle to form an upper guide surface, the inner end part of the locking cover groove 81 is provided with a downward inclined angle to form a lower guide surface, when the bottom surface of the upper cover 1 is matched with the top surface of the lower seat 2 in an abutting mode, the upper guide surface is arranged above the lower guide surface, and the upper guide surface is parallel to the lower guide surface.

Specifically, the bottom surface of the front side of the upper cover 1 is recessed upwards to form an upper vacuum groove 41, the top surface of the front side of the lower seat 2 is recessed downwards to form a lower vacuum groove 42 corresponding to the upper vacuum groove 41, a circle of elastic sealing ring 6 is installed on the outer edge of the upper vacuum groove 41 and/or the lower vacuum groove 42, at least one baffle 43 is convexly arranged on the inner edge of the rear side of the lower vacuum groove 42 upwards, when the upper cover 1 is in press fit with the lower seat 2, the baffle 43 is inserted into the upper vacuum groove 41, the upper vacuum groove 41 and the lower vacuum groove 42 form a sealed vacuum chamber by abutting against the elastic sealing ring 6, a pressure sensor 44 is installed inside the vacuum chamber, and the pressure sensor 44 is electrically connected with a control circuit. When the vacuum packaging bag is inserted into the vacuum pumping chamber for vacuum pumping, the pressure sensor 44 in the vacuum pumping chamber detects that the negative pressure reaches the preset value, the vacuum pumping is completed, the hot melting sealing is automatically carried out, manual operation is not needed, and the use is convenient.

Specifically, the air extraction assembly comprises an air extraction pipe 71 and an air pipe fixing seat 72, the air extraction pipe 71 is in a thin flat shape with a hollow interior, the air pipe fixing seat 72 is fixedly arranged at the rear side of the lower seat 2, the air extraction pipe 71 is exposed at the front side of the top surface of the lower seat 2, the air extraction pipe 71 and the air pipe fixing seat 72 are connected in a rotating or sliding way,

when the polished vacuum packaging bag is vacuumized, the air exhaust pipe 71 is too short, so that the gap of the vacuum packaging bag is bonded and sealed, air is not exhausted at the bottom, and if the air exhaust pipe 71 is too long, the air exhaust pipe passes through the heat sealing assembly 5, so that the bag opening cannot be completely sealed in a hot melting mode.

The air pipe fixing seat 72 comprises an air pipe sliding block 73 and an air pipe return spring 77, the air pipe fixing seat 72 is provided with a sliding cavity 75, the air pipe sliding block 73 is inserted into the sliding cavity 75 and is in sliding connection with the air pipe fixing seat 72, and the tail part of the exhaust pipe 71 is fixedly connected with the front end of the air pipe sliding block 73; one end of the air pipe return spring 77 abuts against the rear end face of the air pipe slider 73, and the other end abuts against the bottom face of the slide chamber 75.

The air pipe slider 73 is provided with an outer chamfer, the outer chamfer surface 76 of the outer chamfer faces outwards, the locking cover slider 82 adjacent to the air pipe slider 73 extends a push block 821 towards the air pipe slider 73, the push block 821 is provided with an inner chamfer, the inner chamfer surface 822 of the inner chamfer faces inwards, the inner chamfer surface 822 is parallel to the outer chamfer surface 76, when the vacuum pumping is performed, the push block 821 moves transversely, and the inner chamfer surface 822 is in transmission fit with the outer chamfer surface 76, so that the push block 821 pushes the air pumping pipe 71 to move along the vertical direction.

Most of the existing vacuumizing sealing machines vacuumize the vacuum packaging bags through the vacuumizing cavity, and the small part of the existing vacuumizing sealing machines vacuumize the vacuum packaging bags through the vacuumizing pipe 71, and both the vacuumizing cavity and the vacuumizing pipe 71 cannot vacuumize the vacuum packaging bags with the polished surfaces and the vacuum packaging bags with the lines at the same time.

When a smooth vacuum packaging bag is used, only the exhaust tube 71 is inserted into the vacuum packaging bag; when the vacuum packaging bag with the lines is used, only the bag opening of the vacuum packaging bag needs to be placed into the vacuum pumping chamber; the operation is convenient.

Specifically, the front end of the exhaust pipe 71 is a front exhaust port 711, the middle section of the exhaust pipe 71 is provided with at least one rear exhaust port 712, and the rear exhaust port 712 is located in the vacuum pumping chamber.

Specifically, the pressure relief mechanism comprises a pressure relief transmission mechanism 120 and a sealing plate 124, the pressure relief transmission mechanism 120 is fixedly or drivingly connected with the sealing plate 124,

the sealing plate 124 sealingly engages the pressure relief vent 110 when the sealing plate 124 is pressed against the pressure relief vent 110,

the pressure relief vent 110 is open to atmosphere when the sealing plate 124 is disengaged from the pressure relief vent 110;

the pressure relief transmission mechanism 120 comprises a pressure relief seat 121, a pressure relief rod 122 and a return spring 127, a seat cavity 123 is formed in the pressure relief seat 121, the pressure relief rod 122 is connected to the seat cavity 123 in a sliding mode, a sealing plate 124 is fixedly connected to the head of the pressure relief rod 122, the area of the sealing plate 124 is larger than the diameter of the pressure relief opening 110, the return spring 127 is installed in the seat cavity 123, one end of the return spring 127 is connected to the bottom of the seat cavity 123, the other end of the return spring is connected to the pressure relief rod 122, and a lock cover driving mechanism is in transmission connection with the pressure relief rod 122 to realize that the push-pull sealing plate 124 moves back and forth towards the pressure relief opening 110.

The bottom surface of the pressure relief seat 121 is provided with a sliding groove 125, the sliding groove 125 is communicated with the seat cavity 123, the tail part of the pressure relief rod 122 is provided with a threaded hole, the threaded hole is in threaded connection with a push-pull bolt 126, the push-pull bolt 126 is perpendicular to the pressure relief rod 122 and is in an L shape, and the push-pull bolt 126 penetrates through the sliding groove 125 and is movably connected with the lock cover driving mechanism.

The locking cap transmission strip 831 is provided with an L-shaped handle 131, the side surface of the handle 131 is fixedly connected with the locking cap transmission strip 831, the front end of the bottom surface of the handle 131 extends outwards to form a pulling and connecting part 132, the pulling and connecting part 132 is provided with an arc-shaped clamping groove 133 facing the bottom opening of the seat cavity 123, and the push-pull bolt 126 is in hooked fit with the clamping groove 133.

The lock cover transmission strip 831 drives the pressure relief rod to open or close the pressure relief transmission mechanism without manually opening the pressure relief transmission mechanism or installing an electromagnetic valve, and the lock cover transmission strip 831 is driven by the lock cover driving motor 832, so that the force for opening the pressure relief transmission mechanism is large, the structure is simple, the cost is low, and the electromagnetic valve is not needed.

Specifically, the left side and the right side of the lower seat 2 are respectively provided with a travel touch control switch 9, the travel touch control switches 9 are electrically connected with the control circuit,

the locking cap drive bar 831 has an initial stop position, an intermediate stop position and an end stop position

When the locking cover transmission strip 831 is located at the initial stop position, the locking cover transmission strip 831 is in trigger fit with the left travel touch switch 9,

when the locking cap transmission strip 831 is located at the end stop position, the locking cap transmission strip 831 is in trigger fit with the right travel touch switch 9,

when the locking cover transmission bar 831 is in triggering fit with the middle touch switch 140, the locking cover transmission bar 831 stops at the middle stop position.

Specifically, the middle touch switch 140 includes a stroke rod 141, a stroke spring 142, and a switch fixing seat 143, the switch fixing seat 143 is provided with a fixing hole 144, a tail of the stroke rod 141 is inserted into the fixing hole 144 to be slidably connected with the switch fixing seat 143, a head of the stroke rod 141 is provided with a metal contact 145, a diameter of the metal contact 145 is larger than that of the stroke rod 141, the stroke spring 142 is sleeved on the stroke rod 141, one end of the stroke spring 142 abuts against one side of the switch fixing seat 143, and the other end abuts against a bottom surface of the metal contact 145

Travel touch switch 9 includes control part and elastic metal piece, control part and locking closure actuating mechanism electric connection, the elastic metal piece sets up between control part and locking closure drive strip 831, the rear end fixed mounting of elastic metal piece is in the medial surface of control part, the medial surface of control part is provided with a metal contact, when locking closure drive strip 831 moved to the front end of elastic metal piece, touch the metal contact at the front end of elastic metal piece, locking closure drive strip 831 contact and extrude the front end of elastic metal piece and move towards the metal contact.

Before vacuum pumping, the locking cap transmission strip 831 is located at an initial stop position; when the vacuumizing is started, the vacuumizing pump and the locking cover driving motor 832 start to work, the locking cover transmission strip 831 moves to the middle stop position, and at the moment, the automatic locking cover mechanism slowly tightens the upper cover 1; when the locking cover transmission strip 831 touches the metal contact 145 of the middle touch switch 140, the locking cover driving motor 832 is triggered to stop, and the vacuumizing is waited to be completed; after the pressure sensor 44 detects that the pressure of the evacuation chamber reaches a preset value, the evacuation pump is triggered to stop and the locking cover driving motor 832 is triggered to work, the locking cover transmission strip 831 moves to the tail end stop position, and meanwhile, the locking cover sliding block 82 pushes the air pipe sliding block 73 to move backwards; after the locking cover transmission strip 831 reaches the tail end stop position, the stroke touch switch 9 installed at the tail end stop position is triggered, at this time, the exhaust pipe 71 is extracted from the vacuum packaging bag and the heat sealing assembly 5, the stroke touch switch 9 controls the heat sealing assembly 5 to carry out hot melting sealing, and the locking cover driving motor 832 stops working; when the heat-sealing assembly 5 reaches the preset heat-sealing time, triggering the locking cover driving motor 832 to rotate reversely, and moving the locking cover transmission strip 831 to the initial stop position; when the locking cap transmission strip 831 touches the travel touch switch 9 installed at the initial stop position, the travel touch switch 9 triggers the locking cap driving motor 832 to stop, at this time, the vacuumizing and sealing are completed, and the upper cap 1 is separated from the lower seat 2.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.