A multifunctional paper box packaging bottom making device

Abstract

A multifunctional bottom making device for paper box packaging solves the problems in the prior art that the related operating devices are independent of each other, have single functions, poor integration, occupy a large space, have low processing efficiency, affect the quality of the finished filling product, have a high failure rate, and have poor practicality. It includes a fixed connection seat on which a bottom making slide rail is arranged, and is characterized in that: a paper box core mold is arranged on the bottom making slide seat slidably arranged on the bottom making slide rail; the bottom making slide seat is connected to the telescopic end of the paper box shift cylinder arranged at the end of the fixed connection seat; a bottom heating mechanism is arranged above the paper box core mold on the bottom making slide seat and located in the middle of the bottom making slide rail, and a bottom pressing and sealing mechanism is arranged on the front side of the bottom heating mechanism. It has a reasonable design and a compact structure, and can integrate the bottom preheating, bottom pre-folding and bottom pressing and sealing operations into one, has high processing efficiency, can ensure the quality of the finished filling product, has a low failure rate, occupies a small space, and is safe and reliable to use.

Description

Technical Field

[0001] The present invention belongs to the technical field of food filling equipment, and specifically relates to a multifunctional paper box packaging bottom making device which can integrate bottom preheating, bottom prefolding and bottom pressing and sealing operations into one, has high processing efficiency, can ensure the quality of the filled finished product, has a low failure rate, occupies a small space, and is safe and reliable to use. Background Art

[0002] For packaging cartons of liquid, powder or granular materials, it is necessary to make a bottom for the bottom of the carton before filling the materials. At present, the devices used in the bottom making process of the carton include a bottom preheating device, a bottom prefolding device and a bottom pressing and sealing device. However, the existing bottom making devices all adopt an independent structure with a single function. Moreover, the processed packaging cartons need to be continuously transported between the various devices, which not only has low processing efficiency and high labor intensity, but also has a poor hygiene level, which affects the quality of the filled finished products. In addition, the existing bottom making devices occupy a large space, have a high failure rate and are not practical enough. Therefore, it is necessary to improve the bottom making device of the bottom of the packaging carton in the prior art. Summary of the invention

[0003] The present invention is aimed at the above problems and provides a multifunctional paper box packaging bottom making device which can integrate bottom preheating, bottom prefolding and bottom sealing operations into one, has high processing efficiency, can ensure the quality of the filled finished product, has a low failure rate, occupies a small space, and is safe and reliable to use.

[0004] The technical solution adopted by the present invention is: the multifunctional paper box packaging bottom making device includes a fixed connecting seat, and is characterized in that: a bottom making slide rail is arranged on the fixed connecting seat, and a bottom making sliding seat is slidably arranged on the bottom making slide rail; a paper box core mold arranged vertically upward is arranged on the bottom making sliding seat, and the bottom making sliding seat is connected to the telescopic end of a paper box shifting cylinder arranged at the end of the fixed connecting seat, and the paper box shifting cylinder is arranged in a direction parallel to the extension direction of the bottom making slide rail; a bottom heating mechanism is arranged above the paper box core mold on the bottom making sliding seat and at the middle of the bottom making slide rail, and a bottom sealing mechanism is arranged on the front side of the bottom heating mechanism and above the end of the fixed connecting seat.

[0005] The bottom-folding swing mechanism is provided on the bottom-making sliding seat, and correspondingly, a bottom-folding fixed guide plate is provided between the bottom heating mechanism and the bottom-sealing mechanism. The bottom-folding swing mechanism moving with the bottom-making sliding seat cooperates with the bottom-folding fixed guide plate to pre-fold the bottom of the packaging paper box sleeved on the paper box core mold before sealing.

[0006] The bottom folding swing mechanism comprises a bottom folding support frame, which is composed of a support body, a sliding seat connecting part at the lower end of the support body is fixedly connected to the bottom sliding seat, and a bottom folding swing frame is rotatably arranged on a swing frame hinge part at the upper end of the support body. The bottom of the packaging paper box is folded by the bottom folding swing frame that can rotate around the swing frame hinge part at the upper end of the bottom folding support frame.

[0007] The bottom folding swing frame includes a swing frame hinge shaft, long rod support arms are respectively arranged at both ends of the swing frame hinge shaft, and a bottom folding long rod is arranged between the front ends of the two long rod support arms. The bottom folding swing frame is rotated and arranged on the swing frame hinge part at the upper end of the bottom folding support frame through the swing frame hinge shaft, and the bottom folding long rods arranged at the front ends of the two long rod support arms and capable of reciprocating swing are used to pre-fold one side of the bottom flap of the packaging paper box.

[0008] A toggle extension rod is also provided on the long rod support arm at the end of the swing frame hinge shaft, and the toggle extension rod is arranged in the direction opposite to the extension direction of the long rod support arm; accordingly, a vertically arranged toggle block fixing frame is provided on one side of the middle part of the fixed connection seat, and a swing frame toggle block is provided on the upper part of the toggle block fixing frame. The swing frame toggle block fixed on the upper part of the toggle block fixing frame is used to toggle the toggle extension rod on the folding bottom swing frame hinged on the upper part of the folding bottom support frame, which moves with the bottom control sliding seat, thereby driving the folding bottom swing frame to swing downward.

[0009] The lower end of the toggle extension rod is provided with a one-way toggle rotating block for contacting the swing frame toggle block, one end of the one-way toggle rotating block is hinged to the rotating block hinge part of the toggle extension rod end, and the rotating block hinge part of the toggle extension rod is also provided with a one-way toggle limit card slot for limiting the rotation direction of the one-way toggle rotating block. After the bottom of the packaging paper box is sealed, the paper box core mold and the bottom folding swing mechanism move back to the initial paper box picking and placing station along with the bottom making sliding seat, and the one-way toggle rotating block at the lower end of the toggle extension rod is in one-way rotation contact with the swing frame toggle block on the upper part of the toggle block fixing frame, so as to reduce the number of reciprocating toggles of the folding bottom swing frame, and effectively improve the service life of the device.

[0010] A swing frame reset spring is arranged between the folding bottom swing frame and the folding bottom support frame of the folding bottom swing mechanism, one end of the swing frame reset spring is connected to the folding bottom swing frame, and the other end of the swing frame reset spring is connected to the lower part of the folding bottom support frame; and a swing frame limit stopper for limiting the swing position of the folding bottom swing frame is also arranged on the upper part of the bracket body of the folding bottom support frame. The swing frame reset spring is used to assist the folding bottom swing frame to reset after swinging, and the swing frame limit stopper is used to limit the swinging position of the folding bottom swing frame.

[0011] The bottom folding fixing guide plate is composed of a horizontally arranged guide plate body, one end of which is provided with a guide plate fixing portion, and the other end of which is provided with a bottom folding oblique edge. The other side of the bottom folding plate of the packaging paper box on the paper box core mold moving with the bottom making sliding seat is pre-folded by the guide plate body having the bottom folding oblique edge at the end.

[0012] The bottom heating mechanism includes a bottom heating wind box, which is connected to the telescopic part of the wind box lifting cylinder, and the fixed part of the wind box lifting cylinder is connected to the cylinder fixing frame; the cylinder fixing frame is arranged above the fixed connection seat through a plurality of supporting columns. The wind box lifting cylinder arranged on the cylinder fixing frame is used to drive the bottom heating wind box to move up and down, so as to preheat the bottom folding plate of the packaging paper box on the paper box core mold that moves with the bottom making sliding seat to the bottom of the bottom heating mechanism before pre-folding and pressing and sealing.

[0013] The bottom sealing mechanism includes a bottom sealing plate, which is connected to the telescopic part of the sealing cylinder arranged on the cylinder fixing frame; and the cylinder fixing frame is arranged above the fixed connection seat through a plurality of supporting columns. The sealing cylinder arranged on the cylinder fixing frame is used to drive the bottom sealing plate to move up and down, thereby sealing the bottom of the packaging paper box bottom folding plate which has been heated and pre-folded on the paper box core mold and moved to the bottom of the bottom sealing mechanism together with the bottom making sliding seat.

[0014] The beneficial effects of the present invention are as follows: since the present invention adopts a fixed connecting seat on which a bottom making slide rail is arranged, a bottom making sliding seat is slidably arranged on the bottom making slide rail, and a paper box core mold arranged vertically upward is arranged on the bottom making sliding seat; the bottom making sliding seat is connected to the telescopic end of the paper box shifting cylinder arranged at the end of the fixed connecting seat, and the paper box shifting cylinder is arranged in a direction parallel to the bottom making slide rail; a bottom heating mechanism is arranged above the paper box core mold on the bottom making sliding seat and in the middle of the bottom making slide rail, and a bottom sealing mechanism is arranged on the front side of the bottom heating mechanism and above the end of the fixed connecting seat, so the present invention has a reasonable design and a compact structure, can integrate the bottom preheating, bottom pre-folding and bottom sealing operations into one, has a high bottom making processing efficiency, can ensure the quality of the filled finished product, has a low device failure rate, occupies a small space, and is safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention (the paper box shifting cylinder is retracted to a certain length, and the bottom making sliding seat together with the paper box core mold thereon is located below the bottom heating mechanism).

[0016] Figure 2 yes Figure 1 A structural schematic diagram of the folding bottom swinging mechanism.

[0017] Figure 3 yes Figure 2 A structural schematic diagram of a folding bottom support frame.

[0018] Figure 4 yes Figure 2 A structural schematic diagram of a folding bottom swing frame.

[0019] Figure 5 yes Figure 4 A-direction view.

[0020] Figure 6 yes Figure 1 A structural schematic diagram of a folding bottom fixed guide plate.

[0021] Figure 7 yes Figure 1 A schematic diagram of a usage state in which the carton shifting cylinder is fully retracted and the bottom making sliding seat together with the carton core mold thereon is moved to the bottom of the bottom pressing and sealing mechanism.

[0022] Explanation of serial numbers in the figure: 1 fixed connecting seat, 2 bottom making slide rail, 3 bottom making sliding seat, 4 paper box core mold, 5 paper box shifting cylinder, 6 folding bottom swinging mechanism, 7 supporting column, 8 cylinder fixing frame, 9 wind box lifting cylinder, 10 bottom heating wind box, 11 bottom folding fixed guide plate, 12 pressure sealing cylinder, 13 bottom pressure sealing plate, 14 bottom folding support frame, 15 bottom folding swing frame, 16 toggle block fixing frame, 17 swing frame toggle block, 18 swing frame return spring, 19 swing frame limit block, 20 bracket body, 21 sliding seat connecting part, 22 swing frame hinge part, 23 swing frame hinge shaft, 24 long rod support arm, 25 bottom folding long rod, 26 toggle extension rod, 27 one-way toggle rotating block, 28 return spring connecting column, 29 rotating block hinge part, 30 one-way toggle limit card slot, 31 guide plate body, 32 guide plate fixing part, 33 bottom folding oblique edge. DETAILED DESCRIPTION

[0023] according to Figures 1 to 7 The specific structure of the present invention is described in detail. The multifunctional paper box packaging bottom making device comprises a fixed connection seat 1 on which a bottom making slide rail 2 is arranged, and a bottom making sliding seat 3 is slidably arranged on the bottom making slide rail 2 of the fixed connection seat 1. A paper box core mold 4 arranged vertically upward for mounting a packaging paper box is arranged on the bottom making slide seat 3, and the bottom making slide seat 3 is connected to the telescopic end of a paper box shifting cylinder 5 arranged at the front end of the fixed connection seat 1; at the same time, the paper box shifting cylinder 5 is arranged in a direction parallel to the extension direction of the bottom making slide rail 2.

[0024] A bottom heating mechanism is provided above the carton core mold 4 on the bottom making sliding seat 3 and at a position in the middle of the bottom making slide rail 2. The bottom heating mechanism includes a bottom heating wind box 10 for preheating the bottom folding plate of the packaging carton, the bottom heating wind box 10 is connected to the telescopic part of the wind box lifting cylinder 9, and the fixed part of the wind box lifting cylinder 9 is connected to the cylinder fixing frame 8 provided above the fixed connection seat 1; the lower side of the cylinder fixing frame 8 is connected to the upper side of the fixed connection seat 1 through a plurality of groups of supporting columns 7; and then the wind box lifting cylinder 9 provided on the cylinder fixing frame 8 is used to drive the bottom heating wind box 10 to move up and down, so as to preheat the bottom folding plate of the packaging carton on the carton core mold 4 that moves with the bottom making sliding seat 3 to the bottom of the bottom heating mechanism before pre-folding.

[0025] A bottom pressing and sealing mechanism is also provided on the front side of the bottom heating mechanism and above the front end of the fixed connection seat 1. The bottom pressing and sealing mechanism includes a bottom pressing and sealing plate 13 for pressing and sealing the bottom of the pre-folded packaging paper box. The bottom pressing and sealing plate 13 is connected to the telescopic part at the lower end of the pressing and sealing cylinder 12 provided on the cylinder fixing frame 8, so that the pressing and sealing cylinder 12 provided on the cylinder fixing frame 8 is used to drive the bottom pressing and sealing plate 13 to move up and down, thereby pressing and sealing the bottom of the packaging paper box that has been heated and pre-folded on the paper box core mold 4 and moves to the bottom of the bottom pressing and sealing mechanism together with the bottom making sliding seat 3.

[0026] At the same time, a bottom folding swing mechanism 6 is also arranged on the bottom making sliding seat 3 and on the rear side of the paper box core mold 4; accordingly, a bottom folding fixed guide plate 11 is arranged between the bottom heating mechanism and the bottom pressing and sealing mechanism. The bottom folding fixed guide plate 11 is composed of a horizontally arranged guide plate body 31, one end of which is connected to the cylinder fixing frame 8 through a guide plate fixing portion 32, and the other end of the guide plate body 31 is provided with a bottom folding oblique edge 33. Thus, the front and rear sides of the bottom folding plate of the packaging paper box sleeved on the paper box core mold 4 are pre-folded before pressing and sealing respectively by the bottom folding fixed guide plate 11 with the bottom folding oblique edge 33 at the end and the bottom folding swing mechanism 6 moving with the bottom making sliding seat 3.

[0027] The bottom folding swing mechanism 6 includes a bottom folding support frame 14, which is composed of a support body 20. The sliding seat connecting part 21 at the lower end of the support body 20 is fixedly connected to the bottom sliding seat 3. The bottom folding swing frame 15 is rotatably arranged on the swing frame hinge part 22 at the upper end of the support body 20. The bottom folding swing frame 15 is composed of a swing frame hinge shaft 23. The two ends of the swing frame hinge shaft 23 are respectively provided with long rod support arms 24 extending upward. A bottom folding long rod 25 is arranged between the front ends of the two long rod support arms 24. The two ends of the bottom folding long rod 25 are respectively connected to the front ends of the long rod support arms 24. The bottom folding swing frame 15 is rotatably arranged on the swing frame hinge part 22 at the upper end of the bottom folding support frame 14 through the swing frame hinge shaft 23, and the bottom folding long rod 25 that can swing back and forth and is arranged at the front ends of the two long rod support arms 24 is used to pre-fold the rear side of the bottom flap of the packaging paper box installed on the paper box core mold 4.

[0028] A swing frame reset spring 18 is provided between the folding bottom swing frame 15 and the folding bottom support frame 14 of the folding bottom swing mechanism 6. One end of the swing frame reset spring 18 is connected to a reset spring connection column 28 provided on the swing frame hinge shaft 23 of the folding bottom swing frame 15; the other end of the swing frame reset spring 18 is connected to the lower part of the folding bottom support frame 14. In addition, a swing frame limit stopper 19 for limiting the swing position of the folding bottom swing frame 15 is also provided on the upper part of the support body 20 of the folding bottom support frame 14; the swing frame reset spring 18 is used to assist the folding bottom swing frame 15 in resetting after swinging around the swing frame hinge 22 at the upper end of the folding bottom support frame 14, and the swing frame limit stopper 19 is used to limit the swing position of the folding bottom swing frame 15 to ensure the reliability of the device.

[0029] At least one of the long rod arms 24 at both ends of the swing frame hinge shaft 23 of the bottom folding swing frame 15 is provided with a toggle extension rod 26, and the toggle extension rod 26 is arranged in a direction opposite to the extension direction of the long rod arm 24. Correspondingly, a vertically arranged toggle block fixing frame 16 is also provided on one side of the middle part of the fixed connection seat 1 corresponding to the toggle extension rod 26; and a swing frame toggle block 17 is fixedly provided on the upper part of the toggle block fixing frame 16. Thus, the toggle extension rod 26 on the bottom folding swing frame 15 hinged on the upper part of the bottom folding support frame 14, which moves together with the bottom making sliding seat 3, is toggled by using the swing frame toggle block 17 fixedly provided on the upper part of the toggle block fixing frame 16, so as to drive the bottom folding swing frame 15 to swing downward and press the bottom of the packaging paper box.

[0030] In order to improve the service life of the device, a one-way toggle block 27 for contacting the swing frame toggle block 17 is provided at the lower end of the toggle extension rod 26 of the folding bottom swing frame 15. One end of the one-way toggle block 27 is hinged to the block hinge portion 29 at the end of the toggle extension rod 26, and a one-way toggle limit slot 30 for limiting the rotation direction of the one-way toggle block 27 is also provided on the block hinge portion 29 of the toggle extension rod 26, that is, the one-way toggle block 27 can only form a rigid contact with the swing frame toggle block 17 on one side to drive the folding bottom swing frame 15 to swing; when the other side of the one-way toggle block 27 contacts the swing frame toggle block 17, since there is no one-way toggle limit slot 30 to fix it, the one-way toggle block 27 will rotate around the block hinge portion 29 (such as Figure 5 As shown). After the bottom of the packaging paper box is sealed, the paper box core mold 4 and the bottom folding swing mechanism 6 move back to the initial paper box picking and placing station along with the bottom making sliding seat 3. By toggling the one-way toggle rotating block 27 at the lower end of the extension rod 26, the one-way rotation contact of the swing frame toggle block 17 at the upper part of the toggle block fixing frame 16 is effectively reduced. The number of reciprocating toggles of the bottom folding swing frame 15 is effectively reduced.

[0031] When the multifunctional paper box packaging bottom making device is used, first, the paper box shifting cylinder 5 is in a fully extended state, and the bottom making sliding seat 3 is located at the initial paper box picking and placing position (such as Figure 1 Then, the operator sets the packaging carton to be made bottom up on the carton core mold 4 of the bottom making sliding seat 3. Then, the carton shifting cylinder 5 is retracted to a certain length, and then drives the bottom making sliding seat 3 together with the carton core mold 4 and the packaging carton thereon to move forward along the bottom making slide rail 2 to below the bottom heating air box 10 of the bottom heating mechanism (as shown in FIG. Figure 1 Afterwards, the bottom heating wind box 10 is driven downward by the wind box lifting cylinder 9 arranged on the cylinder fixing frame 8 to preheat the bottom folding plate of the packaging paper box on the paper box core mold 4 below before pre-folding.

[0032] After the bottom of the packaging carton is preheated, the wind box lifting cylinder 9 drives the bottom heating wind box 10 to move upward; then, the carton shifting cylinder 5 is completely retracted, driving the bottom making sliding seat 3 together with the carton core mold 4 and the packaging carton thereon to move to the bottom sealing plate 13 of the bottom sealing mechanism (such as Figure 7As shown). In addition, during the process of the bottom making sliding seat 3 moving from the bottom heating mechanism to the bottom pressing and sealing mechanism, the bottom folding swing frame 15 hinged on the top of the bottom folding support frame 14, which moves along with the bottom making sliding seat 3, is moved by the swing frame toggle block 17 fixedly arranged on the top of the toggle block fixing frame 16. Thus, the bottom folding swing frame 15 swinging downward and the bottom folding fixed guide plate 11 fixedly arranged between the bottom heating mechanism and the bottom pressing and sealing mechanism are used to pre-fold the front and rear sides of the bottom folding plate of the packaging paper box sleeved on the paper box core mold 4 before pressing and sealing.

[0033] When the bottom of the packaging carton, which has been preheated and pre-folded, moves to the bottom of the bottom sealing mechanism together with the bottom making sliding seat 3, the sealing cylinder 12 arranged on the cylinder fixing frame 8 drives the bottom sealing plate 13 to move downward, and seals the bottom of the packaging carton on the carton core mold 4. After the bottom making of the packaging carton is completed, the sealing cylinder 12 drives the bottom sealing plate 13 to move upward; then, the carton shifting cylinder 5 is fully extended again, and the bottom making sliding seat 3 together with the carton core mold 4 and the packaging carton thereon are pushed back to the initial carton picking and placing station, and the packaging carton with the bottom made is taken down, so as to prepare for the next carton bottom making operation cycle.

Claims

1. A multifunctional paper box packaging bottom making device, comprising a fixed connection seat (1), characterized in that: The fixed connection seat (1) is provided with a bottom guide rail (2), and a bottom slide seat (3) is slidably provided on the bottom guide rail (2); a carton core mold (4) arranged vertically upward is provided on the bottom slide seat (3), and the bottom slide seat (3) is connected to the telescopic end of a carton shift cylinder (5) arranged at the end of the fixed connection seat (1), and the carton shift cylinder (5) is arranged in a direction parallel to the extension direction of the bottom guide rail (2); the carton core mold (4) on the bottom slide seat (3) is arranged vertically upward, and ... A bottom heating mechanism is arranged above the mold (4) and in the middle of the bottom making slide rail (2); a bottom pressing and sealing mechanism is arranged on the front side of the bottom heating mechanism and above the end of the fixed connection seat (1); a bottom folding and swinging mechanism (6) is arranged on the bottom making slide seat (3); and a bottom folding and fixing guide plate (11) is arranged between the bottom heating mechanism and the bottom pressing and sealing mechanism; the bottom folding and swinging mechanism (6) comprises a bottom folding support frame (14), and the bottom folding support frame (14) is composed of a support The frame body (20) is composed of a sliding seat connecting portion (21) at the lower end of the frame body (20) and is fixedly connected to the bottom sliding seat (3); a folding bottom swing frame (15) is rotatably arranged on the swing frame hinge portion (22) at the upper end of the frame body (20); the folding bottom swing frame (15) includes a swing frame hinge shaft (23); long rod support arms (24) are respectively arranged at both ends of the swing frame hinge shaft (23); and a folding bottom long rod (25) is arranged between the front ends of the two long rod support arms (24); A swing frame reset spring (18) is provided between the bottom folding swing frame (15) and the bottom folding support frame (14) of the bottom folding swing mechanism (6); one end of the swing frame reset spring (18) is connected to the bottom folding swing frame (15), and the other end of the swing frame reset spring (18) is connected to the lower part of the bottom folding support frame (14); and a swing frame limit stopper (19) for limiting the swing position of the bottom folding swing frame (15) is also provided on the upper part of the bracket body (20) of the bottom folding support frame (14).

2. The multifunctional paper box packaging bottom making device according to claim 1, characterized in that: A toggle extension rod (26) is also provided on the long rod support arm (24) at the end of the swing frame hinge shaft (23), and the toggle extension rod (26) is arranged in a direction opposite to the extension direction of the long rod support arm (24); accordingly, a vertically arranged toggle block fixing frame (16) is provided on one side of the middle part of the fixed connection seat (1), and a swing frame toggle block (17) is provided on the upper part of the toggle block fixing frame (16).

3. The multifunctional paper box packaging bottom making device according to claim 2, characterized in that: A one-way toggle rotating block (27) for contacting the swing frame toggle block (17) is provided at the lower end of the toggle extension rod (26); one end of the one-way toggle rotating block (27) is hingedly connected to a rotating block hinge portion (29) at the end of the toggle extension rod (26); and a one-way toggle limiting slot (30) for limiting the rotation direction of the one-way toggle rotating block (27) is also provided on the rotating block hinge portion (29) of the toggle extension rod (26).

4. The multifunctional paper box packaging bottom making device according to claim 1, characterized in that: The bottom-folding fixed guide plate (11) is composed of a horizontally arranged guide plate body (31), one end of the guide plate body (31) is provided with a guide plate fixing portion (32), and the other end of the guide plate body (31) is provided with a bottom-folding inclined edge (33).

5. The multifunctional paper box packaging bottom making device according to claim 1, characterized in that: The bottom heating mechanism comprises a bottom heating air box (10), the bottom heating air box (10) being connected to the telescopic portion of the air box lifting cylinder (9), and the fixed portion of the air box lifting cylinder (9) being connected to the cylinder fixing frame (8); the cylinder fixing frame (8) being arranged above the fixed connection seat (1) via a plurality of groups of supporting columns (7).

6. The multifunctional paper box packaging bottom making device according to claim 1, characterized in that: The bottom sealing mechanism comprises a bottom sealing plate (13), the bottom sealing plate (13) being connected to a telescopic portion of a sealing cylinder (12) arranged on a cylinder fixing frame (8); and the cylinder fixing frame (8) is arranged above the fixed connection seat (1) via a plurality of groups of supporting columns (7).

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