CN219924523U - Die casting die - Google Patents

Abstract

The utility model discloses a die casting die which comprises a bottom plate, wherein a mounting block is arranged at the top of the bottom plate, an ejection mechanism is arranged at the inner side of the mounting block and comprises guide plates arranged at two sides of the inner part of the mounting block and a connecting rod arranged between the guide plates, the top of the connecting rod is connected with an ejection plate, a lower die is arranged at the top of the mounting block, the ejection plate is positioned at the bottom of the inner side of the lower die and is in sliding connection with the lower die, a connecting plate is arranged at the top of the lower die, a mounting plate is arranged at the bottom of the connecting plate, and an upper cooling plate and a lower cooling plate are arranged at the inner side of the mounting plate. According to the utility model, through the structural design of the cooling mechanism, the upper die can be sufficiently and uniformly cooled through the lower cooling plate during demolding, so that the probability of sticking a product on the surface of the upper die is effectively reduced, and through the arrangement of the limiting rod and the positioning hole, the upper die can be replaced as required without disassembling the upper cooling plate during use, and the practicability during use is greatly improved.

Description

Die casting die

Technical Field

The utility model relates to the technical field of die casting dies, in particular to a die casting die.

Background

The die casting mould is a tool for casting metal parts, and the die casting process is completed on a special die casting and forging machine, and the basic process of die casting is that molten metal is cast and filled into the cavity of the mould at a low speed or a high speed, the mould is provided with a movable cavity surface, and the movable cavity surface is pressed and forged along with the cooling process of the molten metal, so that not only the shrinkage cavity and shrinkage porosity defect of a blank are eliminated, but also the internal structure of the blank reaches broken grains in a forged state, and the comprehensive mechanical property of the blank is obviously improved.

At present, for an aluminum die casting mold, insufficient cooling often occurs when a plurality of cores are demolded, or the cores cannot be completely separated from the mold cores due to the condition of uneven cooling, or the cores are inadequately stuck on the mold cores due to insufficient cooling; meanwhile, when the upper die and the lower die are separated, the product possibly remains in the die cavity and cannot be separated, so that the quality of the product is reduced, the defective rate is high, and the production cost is high.

Based on the above, a die casting mold is provided, and a new solution is provided for solving the technical problems.

Disclosure of Invention

In view of the above, it is necessary to provide a die casting die against the technical problems set forth in the background art.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the die casting die specifically comprises a bottom plate, the top of bottom plate is provided with the installation piece, the inboard of installation piece is provided with ejection mechanism, ejection mechanism is including setting up deflector and the setting of the inside both sides of installation piece are in connecting rod between the deflector, the top of connecting rod is connected with the ejector pad, the lower mould is installed at the top of installation piece, the ejector pad be located the bottom of lower mould inboard and with lower mould sliding connection, the top of lower mould is provided with the connecting plate, the mounting panel is installed to the bottom of connecting plate, last cooling plate and lower cooling plate are installed to the inboard of mounting panel, go up the cooling plate with the inboard of lower cooling plate is provided with cooling mechanism, the bottom of lower cooling plate is provided with the mould.

Preferably, the cooling mechanism comprises a lower cooling groove arranged at the top of the lower cooling plate, an upper cooling groove corresponding to the lower cooling groove is arranged at the bottom of the upper cooling plate, the lower cooling groove and the upper cooling groove on the inner side of the upper cooling plate jointly form a complete cooling groove, and the input end and the output end of the cooling groove are both connected with a diversion pipe.

Preferably, the top of the lower cooling plate is provided with a sealing groove, the inner side of the sealing groove is provided with a sealing gasket, and the inner side of the lower cooling plate is provided with a plurality of bolt holes.

Preferably, the first holding tank has all been seted up to the both sides of mounting panel, the inboard of first holding tank is provided with the locating plate, the locating plate is close to one side of mounting panel is fixed with a plurality of gag levers, down the locating hole of gag lever post looks adaptation has been seted up to the both sides of cooling plate, the gag lever levers run through the mounting panel and through the locating hole with the cooling plate is connected down, the limiting plate is all installed through the screw to the both sides of mounting panel one end.

Preferably, the inside of installation piece has been seted up and has been held the chamber, the deflector is located hold the inside both sides in chamber, the guide way has been seted up to the inboard of deflector, the inboard sliding connection of guide way has the third spliced pole, the third spliced pole with the connecting rod rotates to be connected, the connecting rod with deflector sliding connection.

Preferably, a T-shaped groove is formed in the bottom of the ejector plate, and the top of the connecting rod is located at the inner side of the T-shaped groove and is in sliding connection with the ejector plate through the T-shaped groove.

Preferably, one end of the connecting rod is connected with a guide rod, one end of the connecting rod, which is far away from the connecting rod, is connected with a connecting ring, an accommodating cavity for the guide rod to move with the connecting ring is formed in the inner side of the mounting block, the guide rod and the connecting ring are located in the inner side of the accommodating cavity, and the guide rod penetrates through the accommodating cavity and is in sliding connection with the mounting block.

Preferably, the inside of installation piece just is located the below rotation of go-between is connected with the driving disk, the one end at driving disk top is provided with first spliced pole, the inboard of go-between has been seted up and can supply first spliced pole activity's spread groove, first spliced pole is located the spread groove inboard of go-between, the go-between the bottom of driving disk is fixed with drive bevel gear, drive bevel gear's one end meshing is connected with drive bevel gear, drive bevel gear keeps away from drive bevel gear's one end is fixed with the second transfer line, the second transfer line is kept away from drive bevel gear's one end runs through the installation piece is fixed with first transfer line, the movable groove has been seted up to the inboard of first transfer line, the bottom of connecting plate is fixed with the actuating lever, the bottom of actuating lever be provided with movable groove assorted second spliced pole, the second spliced pole is located the inboard of movable groove, the actuating lever passes through the second spliced pole with first transfer line is connected.

Preferably, the inboard sliding connection of four terminal angles departments of connecting plate has the bracing piece, a plurality of the bottom of bracing piece with bottom plate fixed connection, a plurality of the top of bracing piece is fixed with the roof, hydraulic bar is installed at the top of roof, hydraulic bar's output run through the roof and with the connecting plate is connected, four terminal angles departments at installation piece top all are fixed with the positioning sleeve, positioning sleeve's inboard sliding connection has the locating lever, the top of locating lever with mounting panel fixed connection.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the structural design of the cooling mechanism, the upper die can be sufficiently and uniformly cooled through the lower cooling plate during demoulding, so that the probability of sticking a product on the surface of the upper die is effectively reduced.

2. According to the utility model, through the arrangement of the limiting rod and the positioning hole, the upper die can be replaced according to the requirement without disassembling the upper cooling plate, so that the practicability in use is greatly improved.

3. According to the utility model, through the structural design of the ejection mechanism, the ejection plate can be driven to move upwards when the mounting plate is lifted, so that a product is ejected from the inner part of the lower die, manual operation is not needed, and the convenience in use is greatly improved.

Drawings

In order to more clearly illustrate the solution of the present utility model, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the upper and lower cooling plates of the present utility model;

FIG. 3 is a schematic cross-sectional view of the lower die and mounting block of the present utility model;

fig. 4 is a schematic structural view of the guide plate and the guide rod of the present utility model.

The labels in the figures are illustrated below:

1. a bottom plate; 2. a support rod; 3. a top plate; 4. a connecting plate; 5. a hydraulic lever; 6. a mounting plate; 7. an upper cooling plate; 8. a lower cooling plate; 9. an upper die; 10. a lower die; 11. a mounting block; 12. a positioning rod; 13. positioning a sleeve; 14. a driving rod; 15. a first transmission rod; 16. a limiting plate; 17. a first accommodation groove; 18. a positioning plate; 19. a limit rod; 20. a flow guiding pipe; 21. a lower cooling tank; 22. sealing grooves; 23. a sealing gasket; 24. positioning holes; 25. bolt holes; 26. a movable groove; 27. an ejector plate; 28. a guide plate; 29. a receiving chamber; 30. a connecting ring; 31. a guide groove; 32. a third connecting column; 33. a connecting rod; 34. a guide rod; 35. a drive plate; 36. a drive bevel gear; 37. driving a bevel gear; 38. and a second transmission rod.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Example 1

Referring to fig. 1-4, a die casting die, including bottom plate 1, the top of bottom plate 1 is provided with installation piece 11, the inboard of installation piece 11 is provided with ejection mechanism, ejection mechanism is including setting up deflector 28 and the connecting rod 33 of setting between deflector 28 in the inside both sides of installation piece 11, the top of connecting rod 33 is connected with ejector plate 27, lower mould 10 is installed at the top of installation piece 11, ejector plate 27 is located the bottom of lower mould 10 inboard and with lower mould 10 sliding connection, the top of lower mould 10 is provided with connecting plate 4, mounting panel 6 is installed to the bottom of connecting plate 4, upper cooling plate 7 and lower cooling plate 8 are installed to the inboard of mounting panel 6, upper cooling plate 7 and the inboard of lower cooling plate 8 are provided with cooling mechanism, the bottom of lower cooling plate 8 is provided with upper mould 9, thereby can carry out abundant and even cooling to upper mould 9 through lower cooling plate 8 when the drawing of patterns, thereby effectively reduce the probability that the product glues on the upper mould 9 surface, and can change upper mould 9 under the circumstances of not upper cooling plate 7 as required, the practicality when not dismantling upper cooling plate 7 has been improved greatly, simultaneously when using can be driven by the high-speed manual work 10 when lifting up the mounting plate, thereby the product is convenient and easy to use.

Referring to fig. 2, the cooling mechanism includes a lower cooling groove 21 formed at the top of the lower cooling plate 8, an upper cooling groove corresponding to the lower cooling groove 21 is formed at the bottom of the upper cooling plate 7, the lower cooling groove 21 and an upper cooling groove on the inner side of the upper cooling plate 7 form a complete cooling groove together, the input end and the output end of the cooling groove are both connected with a flow guide pipe 20, a T-shaped groove is formed on the inner side of the mounting plate 6, specifically, the lower cooling groove 21 is in a folded ring shape and is uniformly distributed at the top of the lower cooling plate 8, the upper mold 9 is firstly mounted at the bottom of the lower cooling plate 8 through screws when being specifically used, a sealing ring assembly is arranged between bolts connecting the lower cooling plate 8 and the upper mold 9 and the lower cooling plate 8, then the upper cooling plate 7 and the lower cooling plate 8 are connected through screws, and then the upper cooling plate 7 and the lower cooling plate 8 are inserted into the T-shaped groove of the mounting plate 6.

Specifically, when the upper cooling plate 7 and the lower cooling plate 8 are installed together, the lower cooling groove 21 and the upper cooling groove are combined together to form a cooling groove of a circular pipeline, and when the cooling groove is used specifically, water flow enters from one of the guide pipes 20 and flows out from the other guide pipe 20 after passing through the cooling groove, so that cooling work is completed.

Referring to fig. 2, a sealing groove 22 is formed at the top of the lower cooling plate 8, a sealing gasket 23 is disposed at the inner side of the sealing groove 22, and a plurality of bolt holes 25 are formed at the inner side of the lower cooling plate 8, specifically, when the connection between the upper cooling plate 7 and the lower cooling plate 8 is completed, the sealing gasket 23 is pressed between the upper cooling plate 7 and the lower cooling plate 8, and the sealing gasket 23 ensures the tightness around the cooling groove.

Example two

According to the embodiment, as shown in fig. 2, first accommodating grooves 17 are formed in two sides of the mounting plate 6, positioning plates 18 are arranged on the inner sides of the first accommodating grooves 17, a plurality of limiting rods 19 are fixed on one side, close to the mounting plate 6, of each positioning plate 18, positioning holes 24 matched with the limiting rods 19 are formed in two sides of each lower cooling plate 8, each limiting rod 19 penetrates through the mounting plate 6 and is connected with each lower cooling plate 8 through each positioning hole 24, each limiting plate 16 is mounted on two sides of one end of the mounting plate 6 through a screw, and the limiting plates 16 can play a role in gear on the upper cooling plates 7 and the lower cooling plates 8, so that positioning work can be assisted in mounting the upper cooling plates 7 and the lower cooling plates 8, the positioning work is more convenient and quick, in specific use, the upper cooling plates 7 and the lower cooling plates 8 mounted together are inserted into the mounting plate 6, and are propped against the mounting plate 6, the positioning holes 24 in the lower cooling plates 8 are aligned with the limiting rods 19, then the limiting rods 19 are inserted into the positioning holes 24, the positioning plates 18 are placed into the inner sides of the first cooling plates 7 through the first accommodating grooves 17, and the positioning plates are mounted on the mounting plate 8 and the mounting plates 18 can be replaced conveniently and quickly when the mounting plates are mounted on the mounting plate 8 and the mounting plate is needed, and the mounting plate is replaced.

Example III

Referring to fig. 3-4, the inner side of the mounting block 11 is provided with a receiving cavity 29, the guide plate 28 is located at two sides of the inner side of the receiving cavity 29, the inner side of the guide plate 28 is provided with a guide groove 31, the inner side of the guide groove 31 is slidably connected with a third connecting column 32, the third connecting column 32 is rotationally connected with a connecting rod 33, the connecting rod 33 is slidably connected with the guide plate 28, specifically, when the third connecting column 32 moves along the guide groove 31, the position of the third connecting column 32 in the vertical direction changes, so that the connecting rod 33 moves inside the guide groove 31 while the connecting rod 33 can move up and down, in the process, the guide plate 28 plays a guide role on the third connecting column 32 through the guide groove 31, and the rotational connection of the third connecting column 32 and the connecting rod 33 enables both sliding connection and rolling connection between the connecting column 32 and the guide groove 31, so that the smoothness of the movement of the third connecting column 32 is greatly improved.

Referring to fig. 4, a T-shaped slot is formed in the bottom of the ejector plate 27, the top of the connecting rod 33 is located inside the T-shaped slot and is slidably connected with the ejector plate 27 through the T-shaped slot, when the connecting rod 33 moves in the horizontal direction, the ejector plate 27 is not affected by the horizontal movement of the connecting rod 33 due to the sliding connection of the ejector plate 27 and the connecting rod 33, and when the connecting rod 33 moves in the vertical direction, the ejector plate 27 is driven to move up and down, so that a product is ejected, the structure is simple, and the practicability of the die is improved.

Referring to fig. 3-4, one end of the connecting rod 33 is connected with a guide rod 34, one end of the guide rod 34 away from the connecting rod 33 is connected with a connecting ring 30, an accommodating cavity for the guide rod 34 and the connecting ring 30 to move is formed in the inner side of the mounting block 11, the guide rod 34 and the connecting ring 30 are both located in the inner side of the accommodating cavity, the guide rod 34 penetrates through the accommodating cavity and is slidably connected with the mounting block 11, and specifically, when the guide rod 34 performs displacement movement in the mounting block 11, the guide rod 34 drives the connecting rod 33 to perform displacement movement.

Referring to fig. 3-4, a driving disc 35 is rotatably connected to the inner side of the mounting block 11 and located below the connecting ring 30, a first connecting post is provided at one end of the top of the driving disc 35, a connecting slot for the first connecting post to move is provided at the inner side of the connecting ring 30, the first connecting post is located at the inner side of the connecting slot of the connecting ring 30, a transmission bevel gear 36 is fixed at the bottom of the driving disc 35 of the connecting ring 30, a driving bevel gear 37 is engaged and connected to one end of the transmission bevel gear 36, a second transmission rod 38 is fixed to one end of the driving bevel gear 37 away from the transmission bevel gear 36, a first transmission rod 15 is fixed to one end of the second transmission rod 38 away from the driving bevel gear 37 through the mounting block 11, the movable groove 26 has been seted up to the inboard of first transfer line 15, the bottom of connecting plate 4 is fixed with actuating lever 14, the bottom of actuating lever 14 is provided with the second spliced pole with movable groove 26 assorted, the second spliced pole is located the inboard of movable groove 26, actuating lever 14 is connected with first transfer line 15 through the second spliced pole, concretely, actuating disk 35 is connected with go-between 30 through the first spliced pole, and provide the drive effect for the motion of go-between 30 through the first spliced pole, when specifically using, actuating disk 35 carries out displacement motion through first actuating post drive go-between 30 when actuating disk 35 rotates, thereby drive guide bar 34 and connecting rod 33 in proper order and carry out displacement motion.

Please refer to fig. 3, the inboard sliding connection of four terminal angles of connecting plate 4 department has bracing piece 2, the bottom and the bottom plate 1 fixed connection of a plurality of bracing pieces 2, the top of a plurality of bracing pieces 2 is fixed with roof 3, hydraulic bar 5 is installed at the top of roof 3, the output of hydraulic bar 5 runs through roof 3 and is connected with connecting plate 4, four terminal angles departments at installation piece 11 top all are fixed with positioning sleeve 13, positioning sleeve 13's inboard sliding connection has locating lever 12, positioning lever 12's top and mounting panel 6 fixed connection, during specific use, the effect of direction is played to the motion of mounting panel 6 through locating lever 12 and positioning sleeve 13, make the vertical lift effect of mounting panel 6 better.

The use process of the die casting die provided by the utility model is as follows:

when the upper die 9 is required to be installed, the upper die 9 is firstly installed at the bottom of the lower cooling plate 8 through screws, then the upper cooling plate 7 is connected with the lower cooling plate 8 through screws, and then the upper cooling plate 7 and the lower cooling plate 8 are inserted into the T-shaped groove of the mounting plate 6;

when demoulding, the cooling liquid enters through one of the guide pipes 20, then flows out of the other guide pipe 20 after flowing through the cooling groove, and the cooling liquid circularly reciprocates in this way, so that the cooling work is fully and uniformly realized;

when the demolding is carried out, the hydraulic lever 5 drives the connecting plate 4 to carry out lifting movement, the connecting plate 4 drives the driving rod 14 to carry out lifting movement, the driving rod 14 drives the first driving rod 15 to rotate around the second driving rod 38, then the first driving rod 15 drives the driving bevel gear 37 to rotate through the second driving rod 38, then the driving bevel gear 36 and the driving disc 35 are driven to rotate, then the connecting ring 30, the guide rod 34 and the connecting rod 33 are sequentially driven to carry out displacement movement, when the connecting rod 33 carries out displacement movement, the guide plate 28 guides the connecting rod 33, the connecting rod 33 carries out lifting movement, then the ejector plate 27 carries out lifting movement, and thus the product is ejected.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is apparent that the above-described embodiments are only some embodiments of the present utility model, but not all embodiments, and the preferred embodiments of the present utility model are shown in the drawings, which do not limit the scope of the patent claims. This utility model may be embodied in many different forms, but rather, embodiments are provided in order to provide a thorough and complete understanding of the present disclosure. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing description, or equivalents may be substituted for elements thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.

Claims (9)

1. The utility model provides a die casting die, its characterized in that, includes bottom plate (1), the top of bottom plate (1) is provided with installation piece (11), the inboard of installation piece (11) is provided with ejection mechanism, ejection mechanism is including setting up deflector (28) and the setting of the inside both sides of installation piece (11) are in connecting rod (33) between deflector (28), the top of connecting rod (33) is connected with ejector plate (27), lower mould (10) are installed at the top of installation piece (11), ejector plate (27) are located the inboard bottom of lower mould (10) and with lower mould (10) sliding connection, the top of lower mould (10) is provided with connecting plate (4), mounting panel (6) are installed to the bottom of connecting plate (4), cooling plate (7) and lower cooling plate (8) are installed to the inboard of mounting panel (6), upper cooling plate (7) with the inboard of lower cooling plate (8) is provided with cooling mechanism, the bottom of lower cooling plate (8) is provided with mould (9).

2. The die casting die according to claim 1, wherein the cooling mechanism comprises a lower cooling groove (21) formed in the top of the lower cooling plate (8), an upper cooling groove corresponding to the lower cooling groove (21) is formed in the bottom of the upper cooling plate (7), the lower cooling groove (21) and the upper cooling groove on the inner side of the upper cooling plate (7) form a complete cooling groove together, and the input end and the output end of the cooling groove are connected with a flow guide pipe (20).

3. A die casting die according to claim 2, characterized in that a sealing groove (22) is provided at the top of the lower cooling plate (8), a sealing gasket (23) is provided at the inner side of the sealing groove (22), and a plurality of bolt holes (25) are provided at the inner side of the lower cooling plate (8).

4. The die casting die according to claim 2, wherein the two sides of the mounting plate (6) are provided with first accommodating grooves (17), the inner sides of the first accommodating grooves (17) are provided with positioning plates (18), one side of each positioning plate (18) close to the mounting plate (6) is fixedly provided with a plurality of limiting rods (19), the two sides of each lower cooling plate (8) are provided with positioning holes (24) matched with the corresponding limiting rods (19), the limiting rods (19) penetrate through the mounting plate (6) and are connected with the corresponding lower cooling plates (8) through the corresponding positioning holes (24), and the two sides of one end of the mounting plate (6) are provided with limiting plates (16) through screws.

5. A die casting die according to claim 1, characterized in that the inner side of the mounting block (11) is provided with a containing cavity (29), the guide plates (28) are positioned on two sides inside the containing cavity (29), the inner side of the guide plates (28) is provided with guide grooves (31), the inner sides of the guide grooves (31) are slidably connected with third connecting columns (32), the third connecting columns (32) are rotatably connected with the connecting rods (33), and the connecting rods (33) are slidably connected with the guide plates (28).

6. A die casting die according to claim 5, characterized in that the bottom of the ejector plate (27) is provided with a T-shaped groove, and the top of the connecting rod (33) is located inside the T-shaped groove and is slidably connected with the ejector plate (27) through the T-shaped groove.

7. The die casting die according to claim 5, wherein one end of the connecting rod (33) is connected with a guide rod (34), one end of the guide rod (34) away from the connecting rod (33) is connected with a connecting ring (30), a containing cavity for the guide rod (34) to move with the connecting ring (30) is formed in the inner side of the mounting block (11), the guide rod (34) and the connecting ring (30) are both located in the inner side of the containing cavity, and the guide rod (34) penetrates through the containing cavity and is in sliding connection with the mounting block (11).

8. The die casting die of claim 7, wherein a driving disc (35) is rotatably connected to the inner side of the mounting block (11) and located below the connecting ring (30), a first connecting column is arranged at one end of the top of the driving disc (35), a connecting groove for the first connecting column to move is formed in the inner side of the connecting ring (30), the first connecting column is located in the connecting groove of the connecting ring (30), a transmission bevel gear (36) is fixed at the bottom of the driving disc (35) of the connecting ring (30), a driving bevel gear (37) is meshed and connected to one end of the transmission bevel gear (36), a second transmission rod (38) is fixed to one end of the driving bevel gear (37) away from the transmission bevel gear (36), a first transmission rod (15) is fixed to the inner side of the first transmission rod (15) in a penetrating mode through the mounting block (11), a movable groove (26) is formed in the inner side of the first transmission rod (15), a driving bevel gear (37) is meshed and connected to the bottom of the connecting plate (4), a second transmission rod (14) is arranged at the bottom of the driving bevel gear (37) and is movably connected to the first transmission rod (15), the driving rod (14) is connected with the first transmission rod (15) through the second connecting column.

9. The die casting die according to claim 1, wherein the inner sides of four end corners of the connecting plate (4) are slidably connected with supporting rods (2), the bottoms of a plurality of the supporting rods (2) are fixedly connected with the bottom plate (1), a top plate (3) is fixed at the top of the supporting rods (2), a hydraulic lever (5) is installed at the top of the top plate (3), the output end of the hydraulic lever (5) penetrates through the top plate (3) and is connected with the connecting plate (4), positioning sleeves (13) are fixed at the four end corners of the top of the mounting block (11), positioning rods (12) are slidably connected with the inner sides of the positioning sleeves (13), and the top of the positioning rods (12) is fixedly connected with the mounting plate (6).