CN213288389U - Crankcase housing mould - Google Patents

Abstract

The utility model provides a crankcase casing mould belongs to crankcase mould technical field, and it has solved the problem of mould and lower mould on the current crankcase casing mould is not convenient for separate. The die comprises a bottom plate, a lower die and an upper die, wherein a first lifting hole is formed in the upper die, a first rotating shaft is arranged on the bottom plate, a first supporting plate is arranged on the first rotating shaft, a first linkage block is arranged on the first supporting plate, and a first connecting rod is fixedly connected to one end, close to the first rotating shaft, of the first supporting plate; the upper die is further provided with a second lifting hole, the bottom plate is provided with a second rotating shaft, the second rotating shaft is provided with a second supporting plate, the second supporting plate is provided with a second linkage block, and one end, close to the second rotating shaft, of the second supporting plate is fixedly connected with a second connecting rod. The utility model discloses after pressing down first connecting rod and second connecting rod simultaneously, can steadily separate mould and lower mould.

Description

Crankcase housing mould

Technical Field

The utility model belongs to the technical field of the crankcase mould, concretely relates to crankcase casing mould.

Background

With the development of science and technology, motorcycles have become common objects in people's lives, and various industries and devices derived from motorcycles are generated, so that a crankshaft of the motorcycle is an indispensable device for starting the motorcycle, the crankshaft of the motorcycle is particularly protected by users, the motorcycle is used for a long time, and a crankcase of the crankshaft of the motorcycle is produced for protecting the crankshaft. The mould is used for making the tool of the shaping article, this kind of tool is formed by various parts, different moulds are formed by different parts, it mainly realizes the processing of the article appearance through the change of the physical state of the shaping material, it is the name of "industrial mother".

The Chinese patent application with the application number of CN201721318250.5 discloses an automobile crankcase shell mold, which comprises a mold base, wherein the top end of the mold base is provided with two sets of clamping devices, a lower module is arranged between the two sets of clamping devices, the top end of the lower module is provided with an opening, the top end of the lower module is provided with an upper module, the bottom end of the upper module is provided with an opening, the upper module is matched with the opening of the lower module, the clamping devices comprise slide rails, the bottom ends of the slide rails are fixedly connected with the top end of the mold base, the top ends of the slide rails are respectively provided with a slide seat in a sliding way, clamping pipes are welded at the top ends of the slide seats, the clamping pipes are of a hollow structure, springs are welded on the inner walls of the bottom ends of the clamping pipes, the top ends of the clamping pipes are respectively provided with a round opening, the clamping pipes are respectively connected with a clamping rod in a sliding way at the opening positions, U, the bottom end of the L-shaped bracket is provided with a motor.

However, in this mold separation, the mold separation is achieved only by the elastic force of the spring, and the magnitude of the urging force in the mold separation is limited, and the mold separation effect is poor. And, this mould manual work is acted on U-shaped screens strip always before the separation, until pushing U-shaped screens strip in the recess, need manual with appointed external force compression spring at this in-process, just can push U-shaped screens strip in the recess smoothly, improved artificial operation burden.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, the utility model aims at providing a crankcase casing mould, be convenient for separate mould and lower mould.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a crankcase housing mold comprises a bottom plate, a lower mold arranged on the bottom plate and an upper mold arranged on the lower mold, wherein a first lifting hole extending horizontally is formed in the upper mold, a first rotating shaft extending along the horizontal direction is arranged on the bottom plate, the length direction of the first rotating shaft is perpendicular to the extending direction of the first lifting hole, a first supporting plate capable of rotating around the central axis of the first rotating shaft is arranged on the first rotating shaft, a first linkage block is hinged to one end, far away from the first rotating shaft, of the first supporting plate, one end, close to the first lifting hole, of the first linkage block extends into the first lifting hole and is in sliding fit with the first lifting hole, and a first connecting rod is fixedly connected to one end, close to the first rotating shaft, of the first supporting plate;

the upper die is further provided with a second lifting hole extending horizontally, the second lifting hole and the first lifting hole are located on two opposite sides of the upper die respectively and are parallel to each other, the bottom plate is provided with a second rotating shaft extending along the horizontal direction, the length direction of the second rotating shaft is perpendicular to the extending direction of the second lifting hole, the second rotating shaft is provided with a second supporting plate capable of rotating around the central axis of the first rotating shaft, one end, away from the second rotating shaft, of the second supporting plate is hinged to a second linkage block, one end, close to the second lifting hole, of the second linkage block extends into the second lifting hole and is in sliding fit with the second lifting hole, and one end, close to the second rotating shaft, of the second supporting plate is fixedly connected with a second connecting rod.

During installation, the first linkage block is inserted into the first lifting hole, the second linkage block is inserted into the second lifting hole, then the first linkage block hinged with the first support plate is inserted into the first lifting hole, the second linkage block hinged with the second support plate is inserted into the second lifting hole, and then the first support plate and the second support plate are installed. When the upper die and the lower die need to be separated, the first connecting rod and the second connecting rod are pressed downwards at the same time, then the first connecting rod moves downwards around the first rotating shaft respectively, and the second connecting rod moves downwards around the second rotating shaft simultaneously; driving one end of the first support plate, which is far away from the first rotating shaft, to move upwards, and simultaneously driving one end of the second support plate, which is far away from the second rotating shaft, to move upwards, so that the upper die is separated from the lower die; the second lifting hole and the first lifting hole are respectively positioned on two opposite sides of the upper die and are parallel to each other, so that the upper die and the lower die can be separated stably.

Among the above-mentioned crankcase casing mould, first extension board on seted up first through-hole, first pivot wear to locate in the first through-hole, the bottom plate on be equipped with the first backup pad that is located first pivot first end department, first backup pad on set up with first through-hole just to the first blind hole that sets up, the bottom plate on still set up the second backup pad that is located the first pivot other end, the second backup pad on set up with first through-hole just to the first connecting hole that sets up, first pivot stretch into first blind hole after passing first connecting hole and first through-hole in proper order.

When installing first extension board, place first extension board on the bottom plate earlier, make first through-hole be located between first connecting hole and the first blind hole, then pass first connecting hole and first through-hole with first pivot in proper order, stretch into at last in the first blind hole can, simple to operate, maneuverability is strong.

In the crankcase shell mold, the second support plate is provided with a second through hole, the second rotating shaft penetrates through the second through hole, the bottom plate is provided with a third support plate located at one end of the second rotating shaft, the third support plate is provided with a second blind hole opposite to the second through hole, the bottom plate is further provided with a fourth support plate located at the other end of the second rotating shaft, the fourth support plate is provided with a second connecting hole opposite to the second through hole, and the second rotating shaft sequentially penetrates through the second connecting hole and the second through hole and then extends into the second blind hole.

When the second support plate is installed, the second support plate is placed on the bottom plate firstly, the second through hole is located between the second connecting hole and the second blind hole, then the second rotating shaft sequentially penetrates through the second connecting hole and the second through hole, and finally the second rotating shaft stretches into the second blind hole.

In the crankcase shell mold, two first lifting holes are formed and are located on the front side face of an upper mold, each first lifting hole is internally provided with a first linkage block, the two first linkage blocks are located in the same horizontal plane, the first linkage blocks are provided with first sliding grooves, the first sliding groove on one first linkage block is parallel to and opposite to the first sliding groove on the other first linkage block, one end of the first support plate, which is close to the first lifting holes, is provided with a first rotating shaft parallel to the first rotating shaft, one end of the first rotating shaft is in rotating fit with one first sliding groove, and the other end of the first rotating shaft is in rotating fit with the other first sliding groove;

the number of the second pulling holes is two, the second pulling holes are all positioned on the rear side surface of the upper die, each second pulling hole is internally provided with a second linkage block, the two second linkage blocks are positioned in the same horizontal plane, the second linkage blocks are provided with second sliding grooves, the second sliding groove positioned on one of the second linkage blocks is parallel to and opposite to the second sliding groove positioned on the other second linkage block, a second rotating shaft parallel to the second rotating shaft is arranged at one end of the second support plate close to the second lifting hole, one end of the second rotating shaft is in rotating fit with one of the second sliding grooves, the other end of the second rotating shaft is in rotating fit with the other second sliding groove, the first lifting hole, the first linkage block, the first sliding groove, the first rotating shaft and the first support plate are respectively arranged in one-to-one symmetry with the second lifting hole, the second linkage block, the second sliding groove, the second rotating shaft and the second support plate.

Because the related parts are respectively and symmetrically arranged one by one, the upper die can be smoothly separated from the lower die; the first rotating shaft is in running fit with the first sliding groove, so that an included angle between the first lifting hole and the first supporting plate can be adjusted, the first linkage block can be conveniently inserted into the first lifting holes with different heights, the second rotating shaft is in running fit with the second sliding groove, the included angle between the second lifting hole and the second supporting plate can be adjusted, and the second linkage block can be conveniently inserted into the second lifting holes with different heights.

In the above-mentioned crankcase casing mould, the first pivot is close to the one end of first connecting hole and is had first screw thread portion, first pivot pass through first screw thread portion and first connecting hole threaded connection. The connection stability of the first rotating shaft is improved.

In the crankcase shell mold, one end, close to the second connecting hole, of the second rotating shaft is provided with a second threaded portion, and the second rotating shaft is in threaded connection with the second connecting hole through the second threaded portion. The connection stability of the second rotating shaft is improved.

In the crankcase shell mold, one end, away from the first rotating shaft, of the first connecting rod is inclined upwards, one end, away from the second rotating shaft, of the second connecting rod is inclined upwards, and the first connecting rod and the second connecting rod are symmetrically arranged. The first linkage block and the second linkage block can be driven to move upwards simultaneously by external force acting on the first connecting rod and the second connecting rod simultaneously, so that the upper die and the lower die are separated smoothly, and the using effect of the die is improved.

In the crankcase shell mold, the bottom plate is provided with the first cushion block, the first supporting plate and the second supporting plate are arranged on the first cushion block, the bottom plate is further provided with the second cushion block, the third supporting plate and the fourth supporting plate are arranged on the second cushion block, and the first cushion block and the second cushion block are the same in thickness.

Compare with the comparison file, this crankcase casing mould's beneficial effect does:

1. the first linkage block and the second linkage block respectively extend into the first lifting hole and the second lifting hole, then the first support plate and the second support plate are installed, the first connecting rod and the second connecting rod are pressed downwards at the same time, then the first connecting rod respectively moves downwards around the first rotating shaft, and simultaneously the second connecting rod moves downwards around the second rotating shaft; driving one end of the first support plate, which is far away from the first rotating shaft, to move upwards, and simultaneously driving one end of the second support plate, which is far away from the second rotating shaft, to move upwards, so that the upper die is separated from the lower die; the second lifting hole and the first lifting hole are respectively positioned on two opposite sides of the upper die and are parallel to each other, so that the upper die and the lower die can be separated stably.

2. Owing to be equipped with first through-hole, first backup pad and first backup pad, when installing first extension board, place first backup pad on the bottom plate earlier, make first through-hole be located between first connecting hole and the first blind hole, then pass first connecting hole and first through-hole with first pivot in proper order, stretch into at last in the first blind hole can, simple to operate, maneuverability is strong.

3. Due to the fact that the second through hole, the second supporting plate and the second supporting plate are arranged, when the second supporting plate is installed, the second supporting plate is placed on the bottom plate firstly, the second through hole is located between the second connecting hole and the second blind hole, then the second rotating shaft penetrates through the second connecting hole and the second through hole in sequence, and finally the second rotating shaft stretches into the second blind hole.

4. The first lifting hole, the first linkage block, the first sliding chute, the first rotating shaft and the first support plate are respectively and symmetrically arranged with the second lifting hole, the second linkage block, the second sliding chute, the second rotating shaft and the second support plate one by one, so that the upper die can be smoothly separated from the lower die; the first rotating shaft is in running fit with the first sliding groove, so that an included angle between the first lifting hole and the first supporting plate can be adjusted, the first linkage block can be conveniently inserted into the first lifting holes with different heights, the second rotating shaft is in running fit with the second sliding groove, the included angle between the second lifting hole and the second supporting plate can be adjusted, and the second linkage block can be conveniently inserted into the second lifting holes with different heights.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of the present crankcase housing mold;

FIG. 2 is an assembled view of the second linkage block;

FIG. 3 is a cross-sectional view of an assembled structure of a first support plate and a second support plate;

FIG. 4 is a sectional view of an assembled structure of a third support plate and a fourth support plate;

FIG. 5 is a schematic structural view of a first plate;

FIG. 6 is a schematic structural view of a second plate;

FIG. 7 is a schematic structural diagram of the first rotating shaft;

FIG. 8 is a schematic structural view of the second shaft;

reference numerals: 1. a base plate; 101. a first support plate; 1011. a first blind hole; 102. a second support plate; 1021. a first connection hole; 103. a third support plate; 1031. a second blind hole; 104. a fourth support plate; 1041. a second connection hole; 2. a lower die; 3. an upper die; 301. a first pull hole; 302. a second pull hole; 401. a first rotating shaft; 402. a second rotating shaft; 5. a first support plate; 501. a first linkage block; 5011. a first chute; 502. a first link; 503. a first through hole; 504. a first rotating shaft; 6. a second support plate; 601. a second linkage block; 6011. a second chute; 602. a second link; 603. a second through hole; 604. a second rotating shaft; 7. a first cushion block; 8. and a second cushion block.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 1 and 2, a crankcase housing mold comprises a bottom plate 1, a lower mold 2 arranged on the bottom plate 1, and an upper mold 3 arranged on the lower mold 2, wherein a first lifting hole 301 extending horizontally is formed in the upper mold 3, a first rotating shaft 401 extending along the horizontal direction is arranged on the bottom plate 1, the length direction of the first rotating shaft 401 is perpendicular to the extending direction of the first lifting hole 301, a first supporting plate 5 capable of rotating around the central axis of the first rotating shaft 401 is arranged on the first rotating shaft 401, one end of the first supporting plate 5, which is far away from the first rotating shaft 401, is hinged with a first linkage block 501, one end of the first linkage block 501, which is close to the first lifting hole 301, extends into the first lifting hole 301 and is in sliding fit with the first lifting hole 301, and one end of the first supporting plate 5, which is close to the first rotating shaft 401, is fixedly connected with a first connecting rod 502;

the upper die 3 is further provided with a second lifting hole 302 extending horizontally, the second lifting hole 302 and the first lifting hole 301 are respectively located on two opposite sides of the upper die 3 and are parallel to each other, the bottom plate 1 is provided with a second rotating shaft 402 extending along the horizontal direction, the length direction of the second rotating shaft 402 is perpendicular to the extending direction of the second lifting hole 302, the second rotating shaft 402 is provided with a second support plate 6 capable of rotating around the central axis of the first rotating shaft 401, one end of the second support plate 6 far away from the second rotating shaft 402 is hinged with a second linkage block 601, one end of the second linkage block 601 near the second lifting hole 302 extends into the second lifting hole 302 and is in sliding fit with the second lifting hole 302, and one end of the second support plate 6 near the second rotating shaft 402 is fixedly connected with a second connecting rod 602.

As shown in fig. 1 and 2, during installation, the first linkage block 501 is inserted into the first lifting hole 301, the second linkage block 601 is inserted into the second lifting hole 302, then the first linkage block 501 hinged to the first support plate 5 is inserted into the first lifting hole 301, the second linkage block 601 hinged to the second support plate 6 is inserted into the second lifting hole 302, and then the first support plate 5 and the second support plate 6 are installed. When the upper die 3 and the lower die 2 need to be separated, the first connecting rod 502 and the second connecting rod 602 are pressed downwards at the same time, and then the first connecting rod 502 moves downwards around the first rotating shaft 401 and the second connecting rod 602 moves downwards around the second rotating shaft 402 respectively; driving one end of the first support plate 5 away from the first rotating shaft 401 to move upwards, and simultaneously driving one end of the second support plate 6 away from the second rotating shaft 402 to move upwards, so that the upper die 3 is separated from the lower die 2; the second lifting hole 302 and the first lifting hole 301 are respectively located on two opposite sides of the upper die 3 and are parallel to each other, which is beneficial to stably separating the upper die 3 from the lower die 2.

As shown in fig. 3 and 5, a first through hole 503 is formed in the first support plate 5, the first rotating shaft 401 is inserted into the first through hole 503, the first support plate 101 located at one end of the first rotating shaft 401 is disposed on the bottom plate 1, a first blind hole 1011 facing the first through hole 503 is formed in the first support plate 101, a second support plate 102 located at the other end of the first rotating shaft 401 is further formed in the bottom plate 1, a first connecting hole 1021 facing the first through hole 503 is formed in the second support plate 102, and the first rotating shaft 401 sequentially penetrates through the first connecting hole 1021 and the first through hole 503 and then extends into the first blind hole.

As shown in fig. 3 and 5, when the first support plate 5 is installed, the first support plate 5 is placed on the bottom plate 1, so that the first through hole 503 is located between the first connection hole 1021 and the first blind hole 1011, then the first rotating shaft 401 sequentially passes through the first connection hole 1021 and the first through hole 503, and finally extends into the first blind hole 1011, so that the installation is convenient, and the operability is strong.

As shown in fig. 5 and 6, a second through hole 603 is formed in the second support plate 6, the second rotating shaft 402 is inserted into the second through hole 603, a third support plate 103 located at one end of the second rotating shaft 402 is arranged on the bottom plate 1, a second blind hole 1031 opposite to the second through hole 603 is formed in the third support plate 103, a fourth support plate 104 located at the other end of the second rotating shaft 402 is further formed in the bottom plate 1, a second connecting hole 1041 opposite to the second through hole 603 is formed in the fourth support plate 104, and the second rotating shaft 402 sequentially penetrates through the second connecting hole 1041 and the second through hole 603 and then extends into the second blind hole 1031.

As shown in fig. 4 and 6, when the second supporting plate 6 is installed, the second supporting plate 6 is firstly placed on the bottom plate 1, so that the second through hole 603 is located between the second connecting hole 1041 and the second blind hole 1031, then the second rotating shaft 402 sequentially passes through the second connecting hole 1041 and the second through hole 603, and finally extends into the second blind hole 1031.

As shown in fig. 1 and 2, the number of the first lifting holes 301 is two, and the first lifting holes 301 are located on the front side surface of the upper die 3, each first lifting hole 301 is provided with one first linkage block 501, the two first linkage blocks 501 are located on the same horizontal plane, the first linkage blocks 501 are provided with first sliding slots 5011, the first sliding slot 5011 located on one of the first linkage blocks 501 is parallel to and opposite to the first sliding slot 5011 located on the other first linkage block 501, one end of the first support plate 5 close to the first lifting hole 301 is provided with a first rotating shaft 504 parallel to the first rotating shaft 401, one end of the first rotating shaft 504 is rotationally matched with one of the first sliding slots 5011, and the other end of the first rotating shaft 504 is rotationally matched with the other first sliding slot 5011;

the number of the second lifting holes 302 is two, the second lifting holes 302 are located on the rear side face of the upper die 3, each second lifting hole 302 is provided with a second linkage block 601, the two second linkage blocks 601 are located in the same horizontal plane, the second linkage blocks 601 are provided with second sliding chutes 6011, the second sliding chutes 6011 on one of the second linkage blocks 601 are parallel to and opposite to the second sliding chutes 6011 on the other second linkage block 601, one end of the second support plate 6 close to the second lifting holes 302 is provided with second rotating shafts 604 parallel to the second rotating shafts 402, one end of each second rotating shaft 604 is in rotating fit with one of the second sliding chutes 6011, the other end of each second rotating shaft 604 is in rotating fit with the other second sliding chute 6011, the first lifting holes 301, the first linkage blocks 501, the first sliding chutes 5011, the first rotating shafts 504 and the first support plate 5 are respectively in rotating fit with the second lifting holes 302, the second linkage blocks 601, the second sliding chutes 6011, the second sliding chutes 601, The second rotating shaft 604 and the second support plate 6 are arranged in one-to-one symmetry.

As shown in fig. 1 and 2, the related components are respectively arranged symmetrically one by one, so that the upper die 3 can be smoothly separated from the lower die 2; the first rotating shaft 504 is in rotating fit with the first sliding groove 5011, so that an included angle between the first lifting hole 301 and the first supporting plate 5 can be adjusted, the first linkage block 501 can be conveniently inserted into the first lifting holes 301 with different heights, the second rotating shaft 604 is in rotating fit with the second sliding groove 6011, an included angle between the second lifting hole 302 and the second supporting plate 6 can be adjusted, and the second linkage block 601 can be conveniently inserted into the second lifting holes 302 with different heights.

As shown in fig. 5 and 7, an end of the first rotating shaft 401 near the first connection hole 1021 has a first threaded portion, and the first rotating shaft 401 is threadedly connected to the first connection hole 1021 through the first threaded portion. The connection stability of the first rotating shaft 401 is improved.

As shown in fig. 7 and 8, one end of the second rotating shaft 402 near the second connection hole 1041 has a second threaded portion, and the second rotating shaft 402 is threadedly connected to the second connection hole 1041 through the second threaded portion. The coupling stability of the second rotating shaft 402 is improved.

As shown in fig. 1 and 2, an end of the first link 502 away from the first rotating shaft 401 is inclined upward, an end of the second link 602 away from the second rotating shaft 402 is inclined upward, and the first link 502 and the second link 602 are symmetrically arranged. The external force acts on the first connecting rod 502 and the second connecting rod 602 at the same time, so that the first linkage block 501 and the second linkage block 601 can be driven to move upwards at the same time, the upper die 3 and the lower die 2 are separated smoothly, and the using effect of the die is improved.

As shown in fig. 1 and 2, a first cushion block 7 is arranged on the bottom plate 1, the first support plate 101 and the second support plate 102 are arranged on the first cushion block 7, the second cushion block 8 is further arranged on the bottom plate 1, the third support plate 103 and the fourth support plate 104 are arranged on the second cushion block 8, and the first cushion block 7 and the second cushion block 8 have the same thickness.

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. The utility model provides a crankcase casing mould, includes bottom plate (1), locates lower mould (2) on bottom plate (1) and locates last mould (3) on lower mould (2), its characterized in that, last mould (3) on set up and to have the first lifting hole (301) of horizontal extension, bottom plate (1) on be equipped with along the first pivot (401) of horizontal direction extension, the length direction of first pivot (401) is perpendicular with the extending direction of first lifting hole (301), first pivot (401) on be equipped with can be around the first extension board (5) of the axis pivoted of first pivot (401), the one end that first pivot (401) was kept away from in first extension board (5) articulates there is first linkage piece (501), the one end that first linkage piece (501) is close to first lifting hole (301) extends to in first lifting hole (301) and with first lifting hole (301) sliding fit, one end of the first support plate (5) close to the first rotating shaft (401) is fixedly connected with a first connecting rod (502);

the upper die (3) is also provided with a second lifting hole (302) which extends horizontally, the second lifting hole (302) and the first lifting hole (301) are respectively positioned on two opposite sides of the upper die (3) and are parallel to each other, a second rotating shaft (402) extending along the horizontal direction is arranged on the bottom plate (1), the length direction of the second rotating shaft (402) is vertical to the extending direction of the second pulling hole (302), a second support plate (6) which can rotate around the central axis of the first rotating shaft (401) is arranged on the second rotating shaft (402), one end of the second support plate (6) far away from the second rotating shaft (402) is hinged with a second linkage block (601), one end of the second linkage block (601) close to the second lifting hole (302) extends into the second lifting hole (302) and is in sliding fit with the second lifting hole (302), and one end of the second support plate (6) close to the second rotating shaft (402) is fixedly connected with a second connecting rod (602).

2. The crankcase housing mold according to claim 1, wherein the first support plate (5) is provided with a first through hole (503), the first rotating shaft (401) is inserted into the first through hole (503), the bottom plate (1) is provided with a first support plate (101) located at one end of the first rotating shaft (401), the first support plate (101) is provided with a first blind hole (1011) opposite to the first through hole (503), the bottom plate (1) is further provided with a second support plate (102) located at the other end of the first rotating shaft (401), the second support plate (102) is provided with a first connecting hole (1021) opposite to the first through hole (503), and the first rotating shaft (401) sequentially passes through the first connecting hole (1021) and the first through hole (503) and then extends into the first blind hole (1011).

3. The crankcase housing mold according to claim 2, wherein the second support plate (6) is provided with a second through hole (603), the second rotating shaft (402) is inserted into the second through hole (603), the bottom plate (1) is provided with a third support plate (103) located at one end of the second rotating shaft (402), the third support plate (103) is provided with a second blind hole (1031) arranged opposite to the second through hole (603), the bottom plate (1) is further provided with a fourth support plate (104) located at the other end of the second rotating shaft (402), the fourth support plate (104) is provided with a second connecting hole (1041) arranged opposite to the second through hole (603), and the second rotating shaft (402) sequentially penetrates through the second connecting hole (1041) and the second through hole (603) and then extends into the second blind hole (1031).

4. The crankcase housing mold according to claim 3, wherein the number of the first pull-up holes (301) is two and each is located on the front side surface of the upper mold (3), one first link block (501) is provided in each first pull-up hole (301), the two first linkage blocks (501) are positioned in the same horizontal plane, first sliding grooves (5011) are formed in the first linkage blocks (501), the first sliding groove (5011) positioned on one first linkage block (501) is parallel to and opposite to the first sliding groove (5011) positioned on the other first linkage block (501), one end of the first support plate (5) close to the first lifting hole (301) is provided with a first rotating shaft (504) parallel to the first rotating shaft (401), one end of the first rotating shaft (504) is in rotating fit with one of the first sliding chutes (5011), the other end of the first rotating shaft (504) is in rotating fit with the other first sliding groove (5011);

the number of the second lifting holes (302) is two, the second lifting holes are located on the rear side face of the upper die (3), a second linkage block (601) is arranged in each second lifting hole (302), the two second linkage blocks (601) are located in the same horizontal plane, a second sliding groove (6011) is formed in each second linkage block (601), a second sliding groove (6011) located in one second linkage block (601) is parallel to and opposite to a second sliding groove (6011) located in the other second linkage block (601), a second rotating shaft (604) parallel to the second rotating shaft (402) is arranged at one end, close to the second lifting hole (302), of the second supporting plate (6), one end of the second rotating shaft (604) is in rotating fit with one second sliding groove (6011), and the other end of the second rotating shaft (604) is in rotating fit with the other second sliding groove (6011), the first lifting hole (301), the first linkage block (501), the first sliding groove (5011), the first rotating shaft (504) and the first support plate (5) are respectively and symmetrically arranged with the second lifting hole (302), the second linkage block (601), the second sliding groove (6011), the second rotating shaft (604) and the second support plate (6).

5. The crankcase housing mold according to claim 4, wherein an end of the first rotating shaft (401) adjacent to the first connecting hole (1021) has a first screw portion, and the first rotating shaft (401) is screw-coupled to the first connecting hole (1021) through the first screw portion.

6. The mold for a crankcase housing according to claim 5, wherein an end of the second rotary shaft (402) adjacent to the second coupling hole (1041) has a second screw portion, and the second rotary shaft (402) is screw-coupled to the second coupling hole (1041) via the second screw portion.

7. A mold for a crankcase housing according to claim 3, wherein an end of the first connecting rod (502) remote from the first rotary shaft (401) is inclined upwardly, an end of the second connecting rod (602) remote from the second rotary shaft (402) is inclined upwardly, and the first connecting rod (502) and the second connecting rod (602) are arranged symmetrically.

8. A mold for a crankcase housing according to claim 3, characterized in that the bottom plate (1) is provided with a first spacer (7), the first support plate (101) and the second support plate (102) are provided on the first spacer (7), the bottom plate (1) is further provided with a second spacer (8), the third support plate (103) and the fourth support plate (104) are provided on the second spacer (8), and the first spacer (7) and the second spacer (8) have the same thickness.

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