CN114105062B

CN114105062B - Mould overturning mechanism

Info

Publication number: CN114105062B
Application number: CN202111451424.6A
Authority: CN
Inventors: 陈小洋; 石鹏涛
Original assignee: JINJIANG BANGDA PLASTIC CO Ltd
Current assignee: JINJIANG BANGDA PLASTIC CO Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2023-03-31
Anticipated expiration: 2041-12-01
Also published as: CN114105062A

Abstract

The invention discloses a die turnover mechanism, which comprises a shifting mechanism, a carrier for fixing a die, a connecting piece, a positioning mechanism, a micro lifting mechanism and a hook mechanism, wherein the carrier is used for fixing the die; wherein set up the connecting piece on shifting mechanism's the removal end, set up positioning mechanism and miniature elevating system on the connecting piece, redesign die-turning mechanism in this scheme to shifting mechanism, positioning mechanism, miniature elevating system, carrier and couple mechanism cooperation are to mould flip on the carrier, and one of them execution action is as follows: the mold is fixed on the carrier, the positioning mechanism and the micro lifting mechanism are moved to the carrier by the shifting mechanism, the positioning mechanism is in butt joint with the carrier to move synchronously, the micro lifting mechanism jacks the lock catch on the mold to unlock, the shifting mechanism resets, in the resetting process, the hanging rod fixed on the side edge of the upper cover of the mold is hooked by the hook, and in the continuous moving process of the carrier, the upper cover of the mold is gradually lifted under the hooking and linking action of the hook, so that the product is conveniently taken out or put in, the whole mechanism is simplified in structure, stable in operation and low in cost.

Description

Mould overturning mechanism

Technical Field

The invention relates to the technical field of mould cover turning devices, in particular to a mould turning mechanism.

Background

In the mold forming production process, a flip cover is usually needed to add or take out a product in the mold, manual opening and opening of a mold cover are generally performed manually by an operator, in the production process, the situations of high temperature, low temperature and the like exist in part of molds, potential safety hazards exist in manual operation, efficiency is low, large-scale expansion is difficult, devices such as the open button and the flip cover are researched and developed in pertinence in part of enterprises on the market, but the defects of complex structure, high cost and the like exist generally, the product cost is increased easily, and further the market competitiveness is reduced, and improvement is needed.

Disclosure of Invention

In order to solve at least one technical defect, the invention provides the following technical scheme:

the application document discloses a mold overturning mechanism, which comprises a shifting mechanism, a carrier for fixing a mold, a connecting piece, a positioning mechanism, a micro lifting mechanism and a hook mechanism;

the moving end of the shifting mechanism is provided with a connecting piece, the connecting piece is provided with a positioning mechanism and a micro lifting mechanism, the carrier is positioned on the moving path of the connecting piece, the shifting mechanism moves the positioning mechanism and the micro lifting mechanism to the carrier, the positioning mechanism synchronizes the carrier to move along with the moving end, and the lifting end of the micro lifting mechanism jacks a lock catch of a mold fixed on the carrier;

the hook mechanism comprises a support and a hook hinged to the support, the hook is located above the moving path of the carrier, and when the carrier passes through, the hook end of the hook hooks the upper cover of the mold after unlocking and gradually covers the upper cover in the frame moving process.

Redesign turnover mechanism in this scheme to shift mechanism, positioning mechanism, miniature elevating system, carriage and couple mechanism cooperation are to mould flip on the carriage, and one of them carries out the action as follows: the mold is fixed on the carrier, the positioning mechanism and the micro lifting mechanism are moved to the carrier by the shifting mechanism, the positioning mechanism is in butt joint with the carrier to move synchronously, the micro lifting mechanism jacks the lock catch on the mold to unlock, the shifting mechanism resets, in the resetting process, the hanging rod fixed on the side edge of the upper cover of the mold is hooked by the hook, and in the continuous moving process of the carrier, the upper cover of the mold is gradually lifted under the hooking and linking action of the hook, so that the product is conveniently taken out or put in, the whole mechanism is simplified in structure, stable in operation and low in cost.

Furthermore, the shifting mechanism is a telescopic shifting mechanism, a screw nut pair shifting mechanism or a rack and pinion shifting mechanism, the telescopic shifting mechanism is a cylinder or a hydraulic cylinder, and a telescopic end of the telescopic shifting mechanism is fixedly connected with a connecting piece; the rack-and-pinion type shifting mechanism comprises a driving motor, a transmission gear and a rack, wherein the output end of the driving motor is provided with the transmission gear, the transmission gear is meshed with the rack, and the rack is provided with the connecting piece.

The selectable scheme of the shifting mechanism is more, such as common cylinders and hydraulic cylinders which are telescopic, a lead screw nut which is movable, a gear rack which is movable and the like can be suitable for the mold turning mechanism, the gear rack shifting mechanism is preferably adopted, a motor is matched with gear transmission to drive the rack to move, the shifting mechanism is low in cost and accurate in displacement, and the product competitiveness is improved beneficially.

Further, the racks are symmetrically arranged, guide plates are arranged on one side of each rack, the racks are in sliding fit with the guide plates, each drive gear comprises a first drive gear and a second drive gear, the first drive gear is fixed at the output end of each drive motor, the two second drive gears are respectively in meshed connection with the corresponding racks and are rotatably connected with the two guide plates, two ends of each drive shaft are respectively provided with a second drive gear, any second drive gear is in meshed connection with the first drive gear, the end part of each connecting piece is fixed with any rack or the head end and the tail end of each connecting piece are respectively fixed on adjacent racks, the symmetrical rack layout is realized, the structure that the racks are driven to move by the drive gears matched with the drive shafts is beneficial to improving the moving balance and stability, the guide plates are in guide limit in sliding fit with the racks, the two ends of the preferred connecting plates are both fixed with the racks, and the stability is further improved.

Preferably, the connecting piece includes connecting plate and fixed plate, the both ends of connecting plate all set up the fixed plate, the fixed plate with the rack is fixed, set up positioning mechanism on the fixed plate, simple structure is practical.

Further, the micro lifting mechanism is an air cylinder or a hydraulic cylinder, and the telescopic end of the micro lifting mechanism is used for jacking the lock catch of the mold on the carrier;

or the miniature lifting mechanism comprises a first telescopic mechanism, a first base and a first connector and a second connector, wherein the first connector is hinged to the telescopic end of the first telescopic mechanism, the second connector is hinged to the base, and the telescopic end of the first telescopic mechanism extends out to enable the hinged positions of the first connector and the second connector to arch to jack up the lock catch of the die on the carrier.

Because of the limitations of installation position, volume and the like, the micro lifting mechanism can be selected as follows: the lifting stroke is shorter by using an air cylinder and a hydraulic cylinder for lifting and the like. In order to improve the lifting stability, a structure that a telescopic mechanism is matched with the hinged connectors to lift is preferably adopted, the telescopic mechanism horizontally stretches, the two connectors are correspondingly arched or reset, and the lifting is stable.

Further, base, telescopic machanism two all with the connecting plate is fixed, connector side radially sets up the guide post, sets up the guide way on the base face that corresponds, and the guide post stretches into in the guide way to it is spacing to lead to the guide post to the guide way, further improves stability.

Furthermore, the positioning mechanism comprises a second telescopic mechanism, a positioning pin is arranged at the telescopic end of the second telescopic mechanism, a jack is arranged on the carrier frame to be matched with the positioning pin, and the second telescopic mechanism moves the positioning pin to enable the positioning pin to be inserted into the jack of the carrier frame to realize synchronous movement;

or the telescopic end of the second telescopic mechanism is provided with a clamping jaw mechanism so that the clamping jaw mechanism clamps the carrier frame to realize synchronous movement.

Based on the function of the positioning mechanism to fix the carriers for synchronous movement, the positioning mechanism may alternatively be a concave-convex fit, and the positioning pin is inserted into the carrier insertion hole by a telescopic mechanism and a matching positioning pin, preferably in a direction perpendicular to the moving direction of the carriers.

Furthermore, the two end parts of the connecting piece are provided with mounting seats, the second telescopic mechanism is fixed on the mounting seats and is telescopic in the longitudinal direction, and the moving end of the shifting mechanism moves in the horizontal direction. The mounting base is added to conveniently fix the telescopic mechanism, and the positioning pin is longitudinally telescopic to be inserted into the carrier frame jack moving horizontally, so that synchronous movement is realized.

Furthermore, the head end of the hook is a hook end, the tail end of the hook is fixed with a sliding block, a support shaft is radially fixed on the support, and the end part of the support shaft penetrates through an upper hole of the sliding block to form a hinge joint;

or the head end of the hook is a hook end and the tail end of the hook is fixed with a sliding block, the support post is radially provided with a support shaft which is in running fit with the support post, and the sliding block is arranged at the end part of the support shaft.

To the hinge structure of couple and pillar, the optional couple is fixed with the back shaft, and back shaft and pillar articulated structure, perhaps select back shaft and pillar fixed, couple tip and back shaft are articulated, select as required.

Furthermore, the supporting shaft is matched with the supporting column in a rotating mode, the end portion of the supporting shaft penetrates through the upper hole of the sliding block, a limiting cylinder is sleeved on the supporting shaft between the sliding block and the supporting column and fixed with the sliding block through a connecting rod, a limiting groove is formed in the peripheral wall of the supporting shaft in the axial direction, a protruding column is radially arranged on the inner wall of the limiting cylinder, the end portion of the protruding column stretches into the limiting groove, and the limiting cylinder is added to limit the shifting range of the hook in the axial direction of the supporting shaft.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention redesigns the mold turnover mechanism, realizes the mold turnover by matching the shifting mechanism, the carrier for fixing the mold, the connecting plate, the positioning mechanism, the micro lifting mechanism and the hook mechanism, has simplified integral structure and low cost, and is suitable for popularization.

Drawings

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

FIG. 1 is an overall configuration diagram of the present rollover mechanism in example 1;

FIG. 2 is a first state diagram of the present rollover mechanism;

FIG. 3 is a second state of use of the present overmold mechanism;

FIG. 4 is a structural view of the micro-lift mechanism;

FIG. 5 is a schematic view of the structure of the rack and pinion shift mechanism;

FIG. 6 is a schematic view of a hook position change structure;

FIG. 7 is a schematic view of the positioning mechanism;

FIG. 8 is a schematic view of the structure of the carrier;

wherein the reference numerals are:

1. a working platform; 2. a drive motor; 3. a positioning mechanism; 3a, a second telescopic mechanism; 3b mounting seats; 3c, a composite bearing; 3d, positioning pins; 4. a rack; 4a, convex edges; 5. a carrier; 5a, a jack; 6. a protective cover; 7. a connecting member; 7a, a connecting plate; 7b, a fixing plate; 8. a micro lifting mechanism; 8a, a first telescopic mechanism; 8b, a connecting block, 8c, a fixing pin, 8d, a first connecting head, 8e, a second connecting head and 8f, a base; 9. a pillar; 10. a support shaft; 11. a limiting groove; 12. a slider; 13. hooking; 14. a mold; 14a, buckling; 14b, forming a bottom die of the die; 14c, covering the mould; 14d, a ring body; 14f, hanging the rod; 14g, bumps; 16. a drive shaft; 17. a guide plate; 17a. A slot; 18. a limiting cylinder; 19. a first transmission gear; 20. a second transmission gear; 21. a slide rail; 22. a connecting rod.

Detailed Description

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

Example 1

As shown in fig. 1, in the present embodiment, the mold flipping mechanism includes a shifting mechanism, a carrier 55 for fixing the mold, a connecting member 77, a positioning mechanism 33, a micro lifting mechanism 88, and a hooking mechanism. As shown in fig. 5 and 6, in this embodiment, a shifting mechanism is installed on a working platform 1, and a rack-and-pinion 4 shifting mechanism is selected and mainly composed of a driving motor 2, a transmission gear, a rack 4, and a transmission shaft 16, a guide plate 17 is fixed on the working platform at intervals, the rack 4 is in sliding fit with the guide plate 17, the driving motor 2 is fixed on the working platform, and a first transmission gear 19 is fixed at an output end of the driving motor 2, two ends of the transmission shaft 16 are rotatably connected with the guide plate 17 through bearings, two ends of the transmission shaft 16 are respectively fixed with a second transmission gear 19, the second transmission gear 19 is in meshing connection with the rack 4, and the first transmission gear 19 is in meshing connection with the first transmission gear 19 on the driving motor 2, and the driving motor outputs, and the first transmission gear 19 and the second transmission gear 19 drive the rack 4 to move. As for the sliding fit structure of the rack 4 and the guide plate 17, as shown in fig. 5, a convex edge 4a is formed on the surface of the rack 4 facing the guide plate 17, a corresponding groove 17a is formed on the guide plate 17, and the convex edge 4a extends into the groove and moves along the groove to form a sliding fit, but other sliding fit structures can be adopted. The displacement mechanism may be a screw-nut pair displacement mechanism, the screw-nut pair displacement mechanism is mounted at the position of the rack 4, and the nut pair is fixed with the connecting piece 7, or an air cylinder, a hydraulic cylinder or the like is used as the displacement mechanism and fixed at the position of the rack 4, and the telescopic end is fixed with the connecting piece 7, which is a common alternative mechanism and is not shown.

In this embodiment, as shown in fig. 1 and fig. 2, the two racks 4 of the shifting mechanism are fixed as a whole by a connecting piece 7, the connecting piece 7 includes a connecting plate 7a and a fixing plate 7b, the fixing plate 7b is radially installed at both ends of the connecting plate 7a, the micro lifting mechanism 8 is installed at the middle position of the connecting plate 7a, the positioning mechanism 3 is installed on the side fixing plate 7b, the carrier 5 is located on the moving path of the connecting plate 7a, as shown in fig. 8, the frame structure is a sliding rail 21 fixed on the surface of the working platform, as shown in fig. 2, the carrier 5 is placed on the sliding rail 21, the mold 14 is fixed on the carrier, and the hook mechanisms are installed on the top surfaces of the two guide plates 17, as shown in fig. 3. Of course, the connecting member 7 may also be a strip plate, both ends of which are directly fixed to the rack 4, and the positioning mechanism 3 is fixed at the positions of both ends.

As shown in fig. 1 and 4, in this embodiment, the micro lifting mechanism 8 includes a first telescoping mechanism 8a, a first base 8f, a first connecting head 8d and a second connecting head 8e, the first telescoping mechanism 8a and the second base 8f are both fixed on the connecting plate 7a, the first connecting head 8d and the second connecting head 8e are both strip plates, the base 8f is in a groove shape, a hinged structure is formed by a head end of the first connecting head 8d and a tail end of the second connecting head 8e through screws, a tail end of the first connecting head 8d is hinged to a connecting block 8b fixed to a telescoping end of the first telescoping mechanism 8a through screws, a head end of the second connecting head 8e is hinged to a groove wall on two sides of the base 8f through screws, and a telescoping end of the second telescoping mechanism 3a extends out to enable the hinged position of the first connecting head 8d and the second connecting head 8e to arch up to open the lock catch of the mold 14 on the carrier 5. As shown in fig. 1, the head end of the upper mold cover 14c is hinged to the L-shaped buckle 14a to be clamped and fixed on the protrusion 14g of the bottom mold 14b, the surface of the buckle 14a is fixed with the ring 14d, the tail end of the upper mold cover 14c is hinged to the bottom mold 14b, the hanging rods 14f are fixed at two sides of the upper mold cover, the ring 14d on the buckle 14a is jacked upwards at the hinged position of the connector, and the buckle 14a is driven by the ring 14d to be separated from the clamped state, so as to be unlocked. Certainly, in order to improve the operation stability, the fixing pins 8c are radially arranged on two sides of the tail end of the first connecting head 8d, the fixing pins 8c are used as guide columns, guide grooves are formed in the corresponding groove walls of the base 8f, and the end portions of the guide columns stretch into the guide grooves.

As shown in fig. 1, 7, and 8, in this embodiment, the positioning mechanism 3 includes a second telescopic mechanism 3a and a positioning pin 3d, the positioning pin 3d is fixed to the telescopic end of the second telescopic mechanism 3a, the insertion hole 5a is formed on the side frame rod of the carrier 5 to match with the positioning pin 3d, the second telescopic mechanism 3a longitudinally extends and retracts the positioning pin 3d, when the carrier 5 is located below the second telescopic mechanism 3a, the second telescopic mechanism 3a moves the positioning pin 3d downward to be inserted into the insertion hole of the carrier 5, and when the shifting mechanism moves horizontally, the carrier 5 moves horizontally and synchronously. This embodiment is easy to assemble, fixed mounting seat 3b on fixed plate 7b, and two 3a of telescopic machanism are fixed at the mount pad 3b top, along the through-hole that stretches out and draws back direction in the mount pad 3b, fixed composite bearing 3c in the through-hole, flexible end passes from composite bearing 3c, corresponds the position trompil on the fixed plate 7b and stretches out with supplying flexible end. Naturally, the gripper mechanism 3a may be fixed to the side of the mounting base 3b at the end of the telescoping mechanism 3a, such as a common cylinder gripper, and this mounting structure is common, and is not shown in the drawings.

As shown in fig. 1, 2, and 5, in this embodiment, the hooking mechanism includes a support 9 and a hook 13, the support 9 is longitudinally fixed on the top surface of the guide plate 17, a support shaft 10 is radially installed at the head end of the support 9, the tail end of the support shaft 10 forms a rotating fit with the support 9 through a bearing, the head end of the hook 13 is a hook end, and the tail end is fixed with a rectangular slider 12, the rectangular slider 12 is provided with a through hole, the head end of the support shaft 10 passes through the through hole, a limiting cylinder 18 is sleeved on the support shaft 10 between the slider 12 and the support 9, the limiting cylinder 18 is fixed with the slider 12 through a connecting rod 22, the peripheral wall of the support shaft 10 is provided with a limiting groove 11 along the axial direction, a hole is formed on the wall of the limiting cylinder 18, and a screw or the like is screwed into the limiting groove 11 to limit the position of the hook, and the end of the convex column can be directly fixed with the support shaft 10, such as welding or the like. In addition, the support 9 can be fixed on or outside the platform on one side of the guide plate 17, and the hook is ensured to be positioned above the hanging rod on the die. And the hinge structure of the hook and the strut 9 can be selected to fix a support shaft 10 and the strut 9, and the support shaft 10 penetrates through the through hole of the slider at the tail end of the hook to form the hinge structure.

For the first telescopic mechanism 8a and the second telescopic mechanism 3a, structures such as an air cylinder and a hydraulic cylinder are adopted in the embodiment, and other mechanisms with similar displacement functions can be adopted, so that the protective function is improved, and the protective cover 6 can cover the positioning mechanism 3.

When the device is used, as shown in fig. 2, the driving motor drives the rack 4 to move to the position B, at the moment, the positioning mechanism 3 is positioned above the jack on the carrier 5, the second telescopic mechanism 3a in the positioning mechanism 3 moves to enable the positioning pin 3d at the end part to be inserted into the jack, the second telescopic mechanism 3a in the miniature lifting mechanism 8 moves, the hinged positions of the head end and the tail end of the first connecting head 8d and the second connecting head 8e upwards arch and push up the annular buckle 14a clamped and clamped on the upper cover of the die, and the shifting mechanism resets, as shown in fig. 3, in the resetting process, the hanging rods 14f at two sides of the upper cover of the die are hooked by the hooks 13, in the continuous moving process, the upper cover 14c of the die is gradually lifted, and when the upper cover is reset to the position A, the turnover cover can be taken out or put in a workpiece and the like; then, the positioning mechanism 3 is reset, and the shifting mechanism moves the die to the position B, so that the die can be matched with the die heating or cooling mechanism, and the efficiency is improved.

The above are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above examples, and all technical solutions that fall under the spirit of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The mould overturning mechanism is characterized by comprising a shifting mechanism, a carrier (5) for fixing a mould, a connecting piece (7), a positioning mechanism (3), a micro lifting mechanism (8) and a hook mechanism;

the moving end of the shifting mechanism is provided with a connecting piece (7), the connecting piece (7) is provided with a positioning mechanism (3) and a micro lifting mechanism (8), the carrier (5) is positioned on the moving path of the connecting piece (7), the shifting mechanism moves the positioning mechanism (3) and the micro lifting mechanism (8) to the position of the carrier (5), the positioning mechanism (3) synchronizes the movement of the carrier (5) along with the moving end, and the lifting end of the micro lifting mechanism (8) jacks the lock catch of the mold fixed on the carrier (5);

the hook mechanism comprises a support column (9) and a hook (13) hinged to the support column (9), wherein the hook (13) is located above a moving path of the carrier (5), and when the carrier (5) passes through, the hook end of the hook (13) hooks an upper cover of the unlocked mold and gradually turns over the cover in the frame moving process.

2. The overmold mechanism of claim 1, wherein: the shifting mechanism is a telescopic shifting mechanism, a screw nut pair type shifting mechanism or a gear rack (4) type shifting mechanism, the telescopic shifting mechanism is a cylinder or a hydraulic cylinder, and a telescopic end of the telescopic shifting mechanism is fixed with a connecting piece (7); the gear rack (4) type shifting mechanism comprises a driving motor (2), a transmission gear and a rack (4), wherein the output end of the driving motor (2) is provided with the transmission gear which is meshed with the rack (4), and the rack (4) is provided with a connecting piece (7).

3. The overmold mechanism of claim 2, wherein: the gear rack is symmetrically arranged on the rack (4), one side of the rack (4) is provided with a guide plate (17), the rack (4) is in sliding fit with the guide plate (17), the transmission gear comprises a first transmission gear (19) and a second transmission gear (20), the first transmission gear (19) is fixed at the output end of the driving motor (2), the two second transmission gears (20) are respectively in meshed connection with the corresponding rack (4) and are rotatably connected between the two guide plates (17) to form a transmission shaft (16), the two ends of the transmission shaft (16) are respectively provided with a second transmission gear, any second transmission gear (20) is in meshed connection with the first transmission gear (19), and the end part of the connecting piece (7) is fixed with any one rack (4) or the head end and the tail end of the connecting piece (7) are respectively fixed on the adjacent rack (4).

4. The overmold mechanism of claim 3, wherein: the connecting piece (7) comprises a connecting plate (7 a) and a fixing plate (7 b), the fixing plate (7 b) is arranged at each of two ends of the connecting plate (7 a), the fixing plate (7 b) is fixed with the rack (4), and the fixing plate (7 b) is provided with a positioning mechanism (3).

5. The overmold mechanism of claim 1, wherein: the micro lifting mechanism (8) is a cylinder or a hydraulic cylinder and the telescopic end of the micro lifting mechanism is used for jacking the lock catch of the mould on the carrier (5);

or miniature elevating system (8) include telescopic machanism (8 a), base (8 f) and tip looks articulated first (8 d), connector two (8 e), first (8 d) of connector with the flexible end hinge of telescopic machanism (8 a), connector two (8 e) are articulated with base (8 f), and the flexible end of telescopic machanism (8 a) stretches out and makes first (8 d) of connector, connector two (8 e) tip hinge department arch in order to back up the hasp of mould on carrier (5).

6. The overmold mechanism of claim 5, wherein: connecting piece (7) are including connecting plate (7 a) and fixed plate (7 b), the both ends of connecting plate (7 a) all set up fixed plate (7 b), base (8 f), telescopic machanism two (3 a) all with connecting plate (7 a) are fixed, first (8 d) side of connector radially sets up the guide post, sets up the guide way on base (8 f) face that corresponds, and the guide post stretches into in the guide way.

7. The overmold mechanism of claim 1, wherein: the positioning mechanism (3) comprises a second telescopic mechanism (3 a), a positioning pin (3 d) is arranged at the telescopic end of the second telescopic mechanism (3 a), a jack (5 a) is arranged on the carrier (5) to be matched with the positioning pin (3 d), and the second telescopic mechanism (3 a) moves the positioning pin (3 d) to enable the positioning pin to be inserted into the jack (5 a) of the carrier (5) to realize synchronous movement;

or the telescopic end of the second telescopic mechanism (3 a) is provided with a clamping jaw mechanism to clamp the carrier (5) to realize synchronous movement.

8. The overmold mechanism of claim 7, wherein: the two end parts of the connecting piece (7) are provided with mounting seats (3 b), the second telescopic mechanism (3 a) is fixed on the mounting seats (3 b) and is telescopic in the longitudinal direction, and the moving end of the shifting mechanism moves in the horizontal direction.

9. The overmold mechanism of claim 1, wherein: the head end of the hook (13) is a hook end, the tail end of the hook is fixed with a sliding block (12), a support shaft (10) is radially fixed on the strut (9), and the end part of the support shaft (10) penetrates through an upper hole of the sliding block (12) to form hinge joint;

or the head end of couple (13) is hook end and its tail end fixed sliding block (12), radially set up support shaft (10) and on pillar (9) support shaft (10) and pillar (9) normal running fit, slider (12) set up in support shaft (10) tip.

10. The overmold mechanism of claim 9, wherein: support shaft (10) and pillar (9) normal running fit, support shaft (10) tip passes from slider (12) upper hole, the cover has spacing section of thick bamboo (18) on support shaft (10) between slider (12) and pillar (9), and spacing section of thick bamboo (18) are fixed with slider (12) through connecting rod (22), support shaft (10) perisporium sets up spacing groove (11) along the axial, radially sets up the projection on spacing section of thick bamboo (18) inner wall, and the projection tip stretches into in spacing groove (11).