CN214300257U

CN214300257U - Mould switching device

Info

Publication number: CN214300257U
Application number: CN202120053893.1U
Authority: CN
Inventors: 李翔; 陆海龙; 许勇; 许军晓; 王国升
Original assignee: NINGXIA MACHINERY RESEARCH INSTITUTE CO LTD
Current assignee: NINGXIA MACHINERY RESEARCH INSTITUTE CO LTD
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-09-28
Anticipated expiration: 2031-01-08

Abstract

The utility model relates to a machining technology field particularly, relates to a mould auto-change over device. A mold switching device comprises a mounting base, a driving cylinder and a movable piece; the mounting seat is provided with a mounting hole, the mounting hole is used for assembling a die connector, the die connector comprises a body, and the peripheral surface of the body is provided with a clamping groove; the driving cylinder is connected with the mounting base, and the movable piece is movably connected with the mounting base and is in transmission connection with the driving cylinder; the driving cylinder is used for driving the moving piece to move relative to the mounting base so as to enable the moving piece to be clamped with the clamping groove, and therefore the movement of the die connector relative to the mounting hole is limited; or the movable piece is separated from the clamping connection with the clamping groove, so that the limitation on the movement of the die connector relative to the mounting hole is eliminated. The mould switching device can improve the dismounting efficiency of the mould and simultaneously can reduce the labor intensity of workers.

Description

Mould switching device

Technical Field

The utility model relates to a machining technology field particularly, relates to a mould auto-change over device.

Background

The bearing die pressing quenching equipment is a special machine tool which can meet the die pressing quenching of workpieces with various specifications and models in the same series. The mould of the bearing needs to be disassembled for many times at the initial debugging stage so as to be convenient for reinstallation after the mould is repaired and the size is adjusted; the die of the bearing also needs to be disassembled after being used for a period of time, so that the die can be conveniently repaired and re-installed after being adjusted in size; meanwhile, the die pressing quenching equipment has certain universality, but the die does not have the universality, one workpiece corresponds to one die, and when the replacement is needed, the die also needs to be disassembled and assembled. At present, the bearing mould pressing quenching equipment has long mould replacing time and high labor intensity of workers.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mould auto-change over device, its simple structure, convenient to use when improving the dismouting efficiency of mould, can alleviate workman's intensity of labour, for example.

The embodiment of the utility model discloses a can realize like this:

in a first aspect, the present invention provides a mold switching device, which includes a mounting base, a driving cylinder and a moving member;

the mounting seat is provided with a mounting hole, the mounting hole is used for assembling a die connector, the die connector comprises a body, and the peripheral surface of the body is provided with a clamping groove;

the driving cylinder is connected with the mounting base, and the movable piece is movably connected with the mounting base and is in transmission connection with the driving cylinder; the driving cylinder is used for driving the moving piece to move relative to the mounting base so as to enable the moving piece to be clamped with the clamping groove, and therefore the movement of the die connector relative to the mounting hole is limited; or the movable piece is separated from the clamping connection with the clamping groove, so that the limitation on the movement of the die connector relative to the mounting hole is eliminated.

In an alternative embodiment, the mold switching device further includes a guide portion that engages with the movable member, the guide portion being configured to guide the movable member to move in a direction perpendicular to an axis of the mounting hole.

In an alternative embodiment, the guide portion is a guide groove opened in the mounting seat, the guide groove extends in a direction perpendicular to an axis of the mounting hole, and the movable member is slidably engaged with the guide groove.

In an optional embodiment, the mounting seat is provided with a mounting cavity, and the driving cylinder and the movable piece are both positioned in the mounting cavity; the movable piece is used for being clamped with the part, accommodated in the mounting cavity, of the die connector.

In an alternative embodiment, the mold switching device further comprises a locking cylinder and a locking member; the locking cylinder is connected with the mounting seat, the locking piece is movably connected with the mounting seat, and the locking piece is in transmission connection with the locking cylinder;

the die connector also comprises a reset piece and a locking piece, the body is provided with an assembling hole and a movable hole, the assembling hole is used for being matched with the pressurizing shaft, the movable hole is communicated with the assembling hole, the locking piece is movably connected with the movable hole, the reset piece is arranged in the movable hole and used for enabling the locking piece to have the trend of moving towards the outside of the movable hole;

the locking cylinder is used for driving the locking piece to move relative to the mounting seat, so that the locking piece moves towards the direction close to the locking block, abuts against the locking block, the locking block is driven to overcome the elastic force of the reset piece to move in the assembling hole, the locking block is clamped with the pressurizing shaft in the assembling hole, and the pressurizing shaft is limited to move relative to the assembling hole.

In an alternative embodiment, the mold switching apparatus further comprises a connecting plate and a plurality of locking members;

a plurality of retaining members set up around the axis interval of mounting hole, and a plurality of retaining members all are connected with the connecting plate, and the connecting plate is connected with the transmission of locking cylinder.

In an alternative embodiment, the locking member is slidably coupled to the mounting seat along the axial direction of the mounting hole.

In an alternative embodiment, the mold switching device further comprises a guide sleeve connected with the mounting seat, the guide sleeve is arranged on the locking member and is slidably matched with the locking member, and the guide sleeve is used for guiding the locking member to move along the axial direction of the mounting hole.

In an alternative embodiment, the end of the locking member for abutment with the locking block is provided with a transition surface.

The utility model discloses beneficial effect includes, for example:

the mould switching device comprises a mounting seat, a driving cylinder and a moving part; the die connector comprises a body, and the outer peripheral surface of the body is provided with a clamping groove; the driving cylinder is connected with the mounting base, and the movable piece is movably connected with the mounting base and is in transmission connection with the driving cylinder; therefore, the movable piece can be driven to move relative to the mounting base by controlling the action of the driving cylinder, and then when the driving cylinder drives the movable piece to move towards the direction close to the mounting hole, the movable piece is clamped with the clamping groove, so that the movement of the die connector relative to the mounting hole can be limited by the clamping of the movable piece and the clamping groove, and the assembly of the die can be completed; similarly, when the driving cylinder drives the moving part to move in the direction away from the mounting hole, the moving part and the clamping groove can be separated from each other, so that the limitation of the moving part on the movement of the die connector relative to the mounting hole can be eliminated, and the die can be dismantled.

In summary, the moving part is driven by the driving cylinder to move relative to the mounting base so as to complete the step of disassembling and assembling the connector with the die, so that the disassembling and assembling efficiency of the die can be improved, and the labor intensity of workers is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a quenching apparatus in an embodiment of the present invention;

fig. 2 is a schematic structural view of a mold switching device according to an embodiment of the present invention;

FIG. 3 is a schematic view of the assembly of the mold switching device and the mold connector according to the embodiment of the present invention;

FIG. 4 is an exploded view of the locking member and the locking block of the embodiment of the present invention;

FIG. 5 is a schematic structural view of a mold connector according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating the assembly of the locking member and the locking block according to the embodiment of the present invention.

Icon: 10-quenching equipment; 11-a press body; 12-a work bench; 13-a lifting mechanism; 14-an oil shield; 15-quenching plate; 16-a pressing assembly; 17-a pressurized cylinder; 18-a pressurized shaft; 20-a mold connector; 21-body; 22-a card slot; 23-a reset member; 24-a locking block; 25-assembly holes; 26-a movable hole; 100-a mold switching device; 110-a mount; 120-a drive cylinder; 130-a movable member; 111-mounting holes; 140-a guide; 141-a guide groove; 112-a mounting cavity; 150-locking cylinder; 160-a retaining member; 161-connecting plate; 170-a guide sleeve; 162-transition surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1 to 3, fig. 1 shows a structure of a quenching apparatus in an embodiment of the present invention, and fig. 2 and 3 show structures of a mold switching device and a mold connector in an embodiment of the present invention; wherein, fig. 2 shows a state that the mold connector is separated from the mold switching device, and fig. 3 shows a state that the mold connector is clamped with the movable member;

The present embodiment provides a mold switching apparatus 100, and the mold switching apparatus 100 is applied to a quenching apparatus 10.

The quenching equipment 10 comprises a press main body 11, a die connector 20 and a die switching device 100; the press body 11 comprises a workbench 12, a lifting mechanism 13, an oil cover 14 and a quenching disc 15, wherein the quenching disc 15 and the lifting mechanism 13 are connected with the workbench 12; the die switching device 100 and the oil cover 14 are both connected with a lifting mechanism 13, the die switching device 100 is used for being clamped with the die connector 20, and the lifting mechanism 13 is used for driving the oil cover 14 and the die switching device 100 to move relative to the workbench 12, so that the oil cover 14 is matched with the quenching disc 15, and a quenching cavity is formed.

The mold switching apparatus 100 includes a mounting base 110, a driving cylinder 120, and a movable member 130;

the mounting seat 110 is provided with a mounting hole 111, the mounting hole 111 is used for assembling the die connector 20, the die connector 20 comprises a body 21, and the outer peripheral surface of the body 21 is provided with a clamping groove 22;

the driving cylinder 120 is connected with the mounting base 110, and the movable element 130 is movably connected with the mounting base 110 and is in transmission connection with the driving cylinder 120; the driving cylinder 120 is used for driving the movable element 130 to move relative to the mounting base 110, so that the movable element 130 is clamped with the clamping groove 22, and the movement of the die connecting head 20 relative to the mounting hole 111 is limited; or to disengage the movable member 130 from the slot 22, thereby eliminating the restriction on the movement of the die connector 20 relative to the mounting opening 111.

Referring to fig. 1-3, the quenching apparatus 10 operates according to the following principle:

the quenching equipment 10 comprises a press main body 11, a die connector 20 and a die switching device 100; the press body 11 drives the oil cover 14 to move relative to the workbench 12 through the lifting mechanism 13, so that the oil cover 14 is matched with the quenching disc 15, and a quenching cavity is formed;

the mold switching device 100 is used for being clamped with the mold connector 20, specifically, the mold switching device 100 includes a mounting base 110, a driving cylinder 120 and a movable element 130; the mounting seat 110 is provided with a mounting hole 111, the mounting hole 111 is used for assembling the die connector 20, the die connector 20 comprises a body 21, and the outer peripheral surface of the body 21 is provided with a clamping groove 22; the driving cylinder 120 is connected with the mounting base 110, and the movable element 130 is movably connected with the mounting base 110 and is in transmission connection with the driving cylinder 120; therefore, the movable element 130 can be driven to move relative to the mounting base 110 by controlling the action of the driving cylinder 120, and then when the driving cylinder 120 drives the movable element 130 to move towards the direction close to the mounting hole 111, the movable element 130 is clamped with the clamping groove 22, so that the movement of the mold connector 20 relative to the mounting hole 111 can be limited by the clamping of the movable element 130 and the clamping groove 22, and further the assembly of the mold can be completed; similarly, when the driving cylinder 120 drives the movable element 130 to move in a direction away from the mounting hole 111, the movable element 130 and the locking groove 22 can be disengaged from each other, so that the limitation of the movable element 130 on the movement of the mold connector 20 relative to the mounting hole 111 can be eliminated, and the mold can be removed.

Because the mold switching device 100 and the oil cover 14 are both connected with the lifting mechanism 13, and the mold connector 20 is clamped with the mold switching device 100, the lifting mechanism 13 can drive the oil cover 14, the mold switching device 100 and the mold clamped with the mold switching device 100 to move relative to the workbench 12, and when the oil cover 14 is matched with the quenching disc 15 to form a quenching cavity, the mold clamped with the mold switching device 100 is matched; and the die after die assembly is positioned in the quenching cavity, so that the quenching processing of the workpiece can be facilitated.

In summary, the quenching apparatus 10 can complete the step of assembling and disassembling the mold connector 20 by driving the moving member 130 to move relative to the mounting base 110 through the driving cylinder 120, so as to improve the efficiency of assembling and disassembling the mold and reduce the labor intensity of the worker.

Referring to fig. 1 to 3, it should be noted that, firstly, when the mold is disassembled and assembled by the mold switching device 100, the position of the mold switching device 100 relative to the press machine main body 11 needs to be adjusted by the lifting mechanism 13 in order to facilitate the disassembly and assembly of the mold, so that when the mold is replaced, the mold switching device 100 needs to be lifted by the lifting mechanism 13, so that the mold switching device 100 is spaced from the worktable 12, and further, an operation workpiece for replacing the mold is formed, so as to improve the efficiency of the disassembly and assembly of the mold. In addition, in the present embodiment, the mold includes a first mold unit and a second mold unit, wherein the first mold unit is connected to the table 12; the second mold unit is provided with a connector for connection with the mold switching device 100, i.e., when the mold is replaced by the mold switching device 100, it means that the second mold unit in the mold is replaced.

Further, referring to fig. 1-3, in the present embodiment, in order to improve the movement precision of the movable element 130 when the movable element 130 moves relative to the mounting base 110, the mold switching device 100 further includes a guide portion 140, the guide portion 140 is engaged with the movable element 130, and the guide portion 140 is used for guiding the movable element 130 to move along an axial direction perpendicular to the mounting hole 111. It should be noted that the extending direction of the free end of the driving cylinder 120 coincides with the direction in which the guide portion 140 guides the moving member 130, so that the moving stability of the moving member 130 with respect to the mounting base 110 is ensured, thereby ensuring the stability of the mold attachment and detachment.

Specifically, when the guide portion 140 is provided, the guide portion 140 may be a guide groove 141 opened in the mounting base 110, the guide groove 141 extends in a direction perpendicular to the axis of the mounting hole 111, and the movable member 130 is slidably engaged with the guide groove 141. In other embodiments of the present invention, the guide portion 140 may be a guide connected to the mounting seat 110, the guide has a guide groove 141, or the guide portion 140 may form the guide groove 141 after being connected to the mounting seat 110.

Further, referring to fig. 1-3, in the present embodiment, in order to improve the connection stability with the mold connector 20, the mounting base 110 has a mounting cavity 112, the mounting hole 111 communicates with the mounting cavity 112, and the driving cylinder 120 and the movable element 130 are both located in the mounting cavity 112; the movable member 130 is for engaging with a portion of the mold connector 20 received in the mounting cavity 112. That is, when the mold needs to be assembled, the mold connector 20 of the mold needs to extend into the mounting cavity 112, and then the driving cylinder 120 drives the movable member 130 to move and to be clamped with the mold connector 20 accommodated in the mounting cavity 112, so that the movement of the mold is limited, and the mounting state of the mold can be maintained. It should be noted that, in such an arrangement manner, the external force applied to the moving part 130 by the mold can be transmitted to the mounting base 110, so that the mounting base 110 can support the moving part 130, so as to improve the connection stability; in addition, when the mold connector 20 extends into the mounting cavity 112, the end of the mold connector 20 provided with the locking groove 22 extends into the mounting cavity 112.

Further, please refer to fig. 1-6, and fig. 4-6 show the structures of the mold switching device and the mold connector according to the embodiment of the present invention; wherein, fig. 4 shows a state that the mold connector is separated from the mold switching device, and fig. 6 shows a state that the mold connector is clamped with the locking block;

as can be seen from the above, the mold includes a first mold unit and a second mold unit, wherein the first mold unit is connected to the table 12; the second mold unit is provided with a connector for connection with the mold switching device 100, i.e., when the mold is replaced by the mold switching device 100, it means that the second mold unit in the mold is replaced. In addition, in the embodiment, the quenching apparatus 10 further comprises a pressurizing assembly 16, the pressurizing assembly 16 comprises a pressurizing cylinder 17 connected with the worktable 12 and a pressurizing shaft 18 in transmission connection with the pressurizing cylinder 17, and the pressurizing shaft 18 is connected with the first die unit; the pressurizing shaft 18 is used for being connected with the second die unit, and when the pressurizing shaft 18 moves relative to the workbench 12 under the driving action of the pressurizing cylinder 17, the first die unit and the second die unit can be driven to move towards the direction close to the workbench 12, so that the first die unit and the second die unit deform along the direction vertical to the axis of the pressurizing shaft 18 to be abutted against the inner ring of the workpiece; therefore, when the quenching oil in the quenching cavity is used for quenching and cooling the workpiece, tension can be formed on the inner wall of the workpiece, the deformation of the workpiece in the circumferential direction in the quenching process is limited, and the processing quality of the workpiece can be improved in the quenching process of the workpiece.

Therefore, when the mold connector 20 is assembled with the mold switching device 100, in order to enable the movement of the pressing shaft 18 to drive the mold connector 20 to move, thereby driving the second mold unit provided with the mold connector 20 to move, the movement of the pressing shaft 18 relative to the mold connector 20 needs to be limited, so the mold switching device 100 further comprises a locking cylinder 150 and a locking member 160; the locking cylinder 150 is connected with the mounting base 110, the locking member 160 is movably connected with the mounting base 110, and the locking member 160 is in transmission connection with the locking cylinder 150; the die connector 20 further comprises a resetting piece 23 and a locking block 24, the body 21 is provided with an assembling hole 25 and a movable hole 26, the assembling hole 25 is used for being matched with the pressurizing shaft 18, the movable hole 26 is communicated with the assembling hole 25, the locking block 24 is movably connected with the movable hole 26, the resetting piece 23 is arranged in the movable hole 26, and the resetting piece 23 is used for enabling the locking block 24 to have a tendency of moving towards the outside of the movable hole 26;

the locking cylinder 150 is used for driving the locking member 160 to move relative to the mounting seat 110, so that the locking member 160 moves towards the direction close to the locking block 24 and abuts against the locking block 24, so as to drive the locking block 24 to move towards the inside of the assembling hole 25 against the elastic force of the resetting piece 23, and further, the locking block 24 is clamped with the pressurizing shaft 18 positioned in the assembling hole 25, and therefore, the movement of the pressurizing shaft 18 relative to the assembling hole 25 is limited.

Therefore, the locking member 160 is driven by the locking cylinder 150 to move relative to the mounting seat 110, so that the locking member 160 can move towards a direction close to or away from the locking block 24, when the locking member 160 moves towards a direction close to the locking block 24, when the locking member 160 moves to a position abutting against the locking block 24, the locking member 160 moves along the same direction to drive the locking block 24 to move towards the assembling hole 25 against the elastic force of the resetting member 23, so that the locking block 24 is clamped with the pressurizing shaft 18 positioned in the assembling hole 25, and the movement of the pressurizing shaft 18 relative to the assembling hole 25 is limited, therefore, when the pressurizing shaft 18 moves under the driving action of the pressurizing cylinder 17, the die connecting head 20 can be driven to move synchronously, namely, the second die unit is driven to move relative to the workbench 12.

Further, in the present embodiment, the mold switching apparatus 100 further includes a connecting plate 161 and a plurality of locking pieces 160; the locking members 160 are arranged at intervals around the axis of the mounting hole 111, the locking members 160 are all connected with the connecting plate 161, and the connecting plate 161 is in transmission connection with the locking cylinder 150. It should be noted that the mold connector 20 is configured with a plurality of locking blocks 24 corresponding to the locking members 160 one by one; and a manner of providing one locking cylinder 150 or a manner of providing a plurality of locking cylinders 150 in one-to-one correspondence of the plurality of locking cylinders 150 and the plurality of locking members 160 may be employed.

When the locking cylinder 150 drives the connecting piece to move, the locking pieces 160 can be driven to move synchronously, and the locking blocks 24 correspond to the locking pieces 160 one by one, so the locking blocks 24 are arranged at intervals around the axis of the mounting hole 111, and then the locking blocks 24 move into the assembling hole 25 by overcoming the elastic force of the resetting piece 23 and are clamped with the pressurizing shaft 18 positioned in the assembling hole 25, uniform limiting force can be applied to the pressurizing shaft 18, and the movement stability of the pressurizing shaft 18 and the die connecting head 20 is kept. In an alternative embodiment, the locker 160 is slidably coupled with the mounting seat 110 in the axial direction of the mounting hole 111.

Further, in the present embodiment, the mold switching apparatus 100 further includes a guiding sleeve 170 connected to the mounting base 110, the guiding sleeve 170 is sleeved on the locking member 160 and slidably engaged with the locking member 160, and the guiding sleeve 170 is used for guiding the locking member 160 to move along the axial direction of the mounting hole 111. In order to reduce the impact between the locking member 160 and the locking block 24 and avoid the jamming between the locking member 160 and the locking block 24, a transition surface 162 is disposed at the end of the locking member 160 abutting against the locking block 24.

As can be seen from the above, in order to improve the connection stability with the mold connector 20, the mounting base 110 has the mounting cavity 112, so that the locking member 160 can be relatively located in the mounting cavity 112, and the mounting base 110 is provided with a through hole for assembling the guide sleeve 170, and the locking cylinder 150 can be disposed in the mounting cavity 112 or outside the mounting cavity 112.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A mold switching device characterized in that:

the mould switching device comprises a mounting seat, a driving cylinder and a moving part;

the driving cylinder is connected with the mounting base, and the movable piece is movably connected with the mounting base and is in transmission connection with the driving cylinder; the driving cylinder is used for driving the movable piece to move relative to the mounting base so that the movable piece is clamped with the clamping groove, and therefore the movement of the die connecting head relative to the mounting hole is limited; or the movable part is separated from the clamping groove, so that the limitation of the movement of the die connector relative to the mounting hole is eliminated.

2. The mold switching apparatus according to claim 1, wherein:

the mold switching device further comprises a guide portion, the guide portion is matched with the movable member, and the guide portion is used for guiding the movable member to move along the axis direction perpendicular to the mounting hole.

3. The mold switching apparatus according to claim 2, wherein:

the guide part is a guide groove arranged on the mounting base, the guide groove extends along the direction perpendicular to the axis of the mounting hole, and the moving part is matched with the guide groove in a sliding mode.

4. The mold switching apparatus according to claim 1, wherein:

the mounting base is provided with a mounting cavity, and the driving cylinder and the movable piece are both positioned in the mounting cavity; the movable piece is used for being clamped with the part, accommodated in the installation cavity, of the die connector.

5. The mold switching apparatus according to claim 1, wherein:

the mould switching device also comprises a locking cylinder and a locking piece; the locking cylinder is connected with the mounting seat, the locking piece is movably connected with the mounting seat, and the locking piece is in transmission connection with the locking cylinder;

The die connector further comprises a reset piece and a locking block, the body is provided with an assembling hole and a movable hole, the assembling hole is used for being matched with the pressurizing shaft, the movable hole is communicated with the assembling hole, the locking block is movably connected with the movable hole, the reset piece is arranged in the movable hole, and the reset piece is used for enabling the locking block to have the trend of moving outwards of the movable hole;

the locking cylinder is used for driving the locking piece for the mount pad moves, so that the locking piece moves towards being close to the direction of the locking block, and with the locking block butt is driven the locking block overcomes the elastic force of the reset piece moves in the assembly hole, so that the locking block is clamped with the pressurizing shaft in the assembly hole, and the pressurizing shaft is limited to move relative to the assembly hole.

6. The mold switching apparatus according to claim 5, wherein:

the mould switching device also comprises a connecting plate and a plurality of locking pieces;

a plurality of the retaining member is wound the axis interval setting of mounting hole, it is a plurality of the retaining member all with the connecting plate is connected, the connecting plate with the transmission of locking cylinder is connected.

7. The mold switching apparatus according to claim 5, wherein:

the locking piece is connected with the mounting seat in a sliding mode along the axis direction of the mounting hole.

8. The mold switching apparatus according to claim 7, wherein:

the mould auto-change over device still include with the uide bushing that the mount pad is connected, the uide bushing cover is located the retaining member, and with retaining member slidable ground cooperates, the uide bushing is used for guiding the retaining member is followed the axis direction motion of mounting hole.

9. The mold switching apparatus according to claim 5, wherein:

the retaining member is used for with the tip of latch segment butt is provided with the transition face.