Double-moving-mold oil cylinder

Abstract

The utility model discloses a double-mold-moving oil cylinder, relates to the technical field of parts of a die-casting machine, and aims to solve the problems that axial stress between a mold-moving oil cylinder shaft and a mold-moving plate of the die-casting machine is unstable, the parts of the die-casting machine deform under the action of the mold-moving oil cylinder, and the mold opening and closing matching precision is reduced. The oil cylinder body, the die moving piston rod, the extension sealing cover and the contraction sealing cover are mainly arranged, so that the stress stability of the die moving plate of the die-casting machine during die opening and closing is improved, and the possibility that the die opening and closing matching precision of a die-casting die on the die moving plate is influenced by elastic deformation of the die moving plate of the die-casting machine is reduced. By arranging the guide matching groove, the mold moving piston rod and the shrinkage oil port, the stability of the mold moving oil cylinder in the mold moving axial force supply condition is improved, and the possibility of oil pressure leakage caused by the matching clearance between the piston and the oil cylinder body and between the mold moving piston rod and the oil cylinder body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting machine parts, in particular to a double-mold-shifting oil cylinder. Background Art

[0002] The essence of die casting is to pour the molten or semi-molten alloy into the pressure chamber of the die casting machine, and then fill it into the cavity of the die casting mold at a very high speed under the action of high pressure, and cool and solidify the molten alloy under high pressure. It is a high-efficiency and high-precision casting method.

[0003] The die-casting machine mold clamping structure is mostly a three-plate mold clamping structure. The movable template and the rear template are provided with movement and docking guidance through the coring column. During the die-casting machine's mold opening and closing action, the movable template is pushed to move on the die-casting mold opening and closing track by the mold shifting cylinder, and the mold locking and die-casting clamping are assisted to complete the die-casting mold opening and closing work. When the mold shifting cylinder is working, the piston rod is usually only subjected to the axial reaction force generated during the mold opening and closing action. Due to the limitation of mechanical manufacturing accuracy and the existence of matching errors, the axial force usually subjected to the mold shifting cylinder will have a component force deviating from its axial direction. These components will become destructive forces that deviate from the guiding direction of the piston rod and the piston of the mold shifting cylinder piston cylinder, reduce the guiding accuracy of the cylinder body to the piston rod and the piston, and increase the possibility of wear and leakage of the mold shifting cylinder. Most of the existing cylinders reduce the influence of this destructive component force by arranging a structure that accommodates a small range of matching surface sliding on the outside of the piston rod, but fail to completely eliminate the destructive component force. In order to ensure its sealing performance, most of the existing mold shifting cylinders are non-detachable structures after assembly or difficult to maintain, which makes it difficult to cope with the high-efficiency mold opening and closing and mold shifting work of the die-casting machine.

[0004] In the prior art, for example, the U.S. invention patent US20120276242A1 discloses a mold clamping device including a mold clamping cylinder. In this invention patent, a conventional hydraulic cylinder is used for mold opening and closing and an auxiliary locking method and is arranged on the die-casting machine. The cylinder for the mold shifting function is connected to the piston rod and the piston in the cylinder body through an oil chamber with a smaller inner diameter and springs and other components. In the process of the moving template cooperating with the mold opening and closing action, when the load such as the reaction force or the reaction force deviating from the axial direction is large, the destructive force components will be directly transmitted to the connection position between the piston and the piston rod through the piston rod to cause damage. At the same time, the structure has high manufacturing precision requirements and may not be able to provide the mold shifting power for the high-speed mold opening and closing of the die-casting machine. In addition, when the guiding precision is reduced, the force acting on the displacement of the displacement template may cause deformation dislocation and reduced mold opening and closing precision. Utility Model Content

[0005] The utility model aims to provide a double die-shifting oil cylinder to solve the problem of unstable axial force between the die-shifting oil cylinder shaft and the die-shifting plate of the die-casting machine and the deformation of the die-casting machine parts caused by the action of the die-shifting oil cylinder, thereby reducing the opening and closing mold matching accuracy.

[0006] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0007] The double mold-shifting cylinder comprises a supporting seat and two symmetrically distributed cylinder bodies, a mold-shifting piston rod is arranged in the cylinder body, a fixing sleeve is fixedly connected to one end of the cylinder body, a covering bearing groove is arranged at the upper end of the supporting seat, a cylinder body is arranged in the covering bearing groove, a shrinkage cover is arranged at the right end of the cylinder body, an extension cover is arranged at the left end of the cylinder body, and a docking shoulder is arranged at the right end of the mold-shifting piston rod; the two symmetrically arranged cylinder bodies and the mold-shifting piston rod can provide two parallel axial forces during operation, thereby reducing the possibility of local structural fatigue and reduced strength of the die-casting template during the mold-shifting action, improving the force stability of the die-casting machine mold-shifting template during mold opening and closing, reducing the possibility of the die-casting machine mold-shifting template being affected by elastic deformation and affecting the opening and closing matching accuracy of the die-casting mold on the mold-shifting template, and improving the opening and closing working efficiency of the die-casting machine mold-shifting template.

[0008] Preferably, an oil chamber is provided in the cylinder body, a piston is slidably connected in the oil chamber, the left end of the mold shifting piston rod is fixedly connected to the piston, the right end of the oil chamber is slidably connected to the contraction cover, and the left end of the oil chamber is slidably connected to the extension cover; the cylinder body and the extension cover and the contraction cover are detachably connected, which improves the convenience of repairing and inspecting mold shifting cylinder faults and reduces the possibility of mold shifting cylinder faults reducing the working efficiency of the die-casting machine.

[0009] Preferably, an extension oil port is provided in the extension cover, the extension oil port is communicated with the oil chamber, a second boss is provided at the right end of the extension cover, and the left end of the oil chamber is slidably connected to the second boss; the sealing performance and connection rigidity of the detachable fit between the extension cover and the cylinder body can be improved, and the stability of the mold shifting power provided by the oil pressure transmission of the mold shifting cylinder is improved.

[0010] Preferably, a group of evenly distributed docking fixing holes are provided in the circumferential direction of the extension cover, and a cover fixing seat is fixedly connected to the left end of the cylinder body, and the cover fixing seat is located on the right side of the extension cover. Bolts are provided in the docking fixing holes, and the extension cover is fixedly connected to the cover fixing seat through the bolts in the docking fixing holes, thereby reducing the influence of vibration and impact on the sealing performance of the mold shifting cylinder.

[0011] Preferably, a first boss is provided at the left end of the shrinkable cover, the right end of the oil chamber is slidably connected to the first boss, and the shrinkable cover is fixedly connected to the cylinder body through the first boss.

[0012] Preferably, the right end of the oil cylinder body is fixedly connected to an identical cover fixing seat, a group of identical docking fixing holes are provided in the circumferential direction of the shrinkable cover, and the shrinkable cover is fixedly connected to the cover fixing seat through the docking fixing holes.

[0013] Preferably, a guide matching groove is provided in the shrinkage cover, the right end wall of the guide matching groove is slidingly connected to the mold shifting piston rod, and a shrinkage oil port is provided in the side wall of the guide matching groove in the circumferential direction, and the shrinkage oil port is connected with the oil chamber to improve the sliding matching guide accuracy of the piston fixed to the mold shifting piston rod in the oil chamber, reduce the influence of the matching clearance on the coaxiality between the piston, the mold shifting piston rod and the cylinder body, improve the stability of the mold shifting axial force supply of the mold shifting cylinder, and reduce the possibility of oil pressure leakage caused by the matching clearance between the piston and the mold shifting piston rod and the cylinder body.

[0014] Preferably, two groups of left-right symmetrical covering mounting holes and covering positioning holes are provided at the upper end of the support seat, a covering bearing is provided on the upper side of the support seat, the left and right ends of the covering bearing are provided with the same covering mounting holes and covering positioning holes, and the lower end of the covering bearing is provided with an same covering bearing groove; the area of ​​the force contact surface of the supporting cylinder body and the fixed sleeve for installing the supporting seat is increased, and the installation stability of the mold shifting cylinder on the die-casting machine is improved.

[0015] Preferably, a group of bearing limit holes evenly distributed in the circumferential direction are provided at the right end of the cover bearing, a group of identical bearing limit holes are provided at the right end of the support seat, and two left-right symmetrical support positioning surfaces are provided on the lower end surface of the support seat, and keyways and support mounting holes are provided on both support positioning surfaces; this reduces the possibility of the mold shifting cylinder being deformed by the reaction force in the process of providing power for opening and closing the mold, resulting in reduced power accuracy and structural damage; increases the support area and installation accuracy of the cylinder body and the fixed sleeve from the reaction force of opening and closing the mold, and improves the stability of the load force of the mold shifting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the assembly structure of the double mold shifting cylinder of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the assembly relationship between the middle cover bearing and the support seat;

[0019] Figure 3 yes Figure 2 A schematic top view of the middle support seat;

[0020] Figure 4 yes Figure 2 A bottom view of the middle support seat;

[0021] Figure 5 yes Figure 2 A bottom view of the middle cover bearing shell;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the double mold shifting cylinder of the utility model;

[0023] Figure 7 It is a schematic diagram of the internal structure of the cylinder body;

[0024] Figure 8 yes Figure 7 A partial enlarged schematic diagram of point E in the middle;

[0025] Fig. 9 yes Figure 7 A partial enlarged schematic diagram of point F in the middle;

[0026] Fig.10 It is a schematic diagram of the assembly relationship between the mold transfer piston rod and the piston;

[0027] Fig.11 yes Figure 7 Schematic diagram of the three-dimensional structure of the mid-elongated cover;

[0028] Fig.12 yes Figure 7 Schematic diagram of the three-dimensional structure of the shrink cover;

[0029] Fig.13 yes Fig.12 A schematic diagram of the main view;

[0030] Fig.14 It is a schematic diagram of the assembly relationship between the mold transfer piston rod and the movable mold plate;

[0031] Fig.15 yes Fig.14 A schematic diagram of the main view;

[0032] Fig.16 yes Fig.15 A right front view schematic diagram of

[0033] Fig.17 yes Fig.15 Left front view schematic diagram of .

[0034] Figure numbers: support seat 10; support mounting hole 11; covering bearing groove 12; bearing limit hole 13; support positioning surface 14; covering positioning hole 15; covering mounting hole 16; keyway 17; covering bearing 20; cylinder body 30; fixing sleeve 31; shrinking cover 32; extending cover 33; cover fixing seat 35; mold transfer piston rod 38; docking shoulder 39; oil chamber 40; piston 41; extending oil port 42; docking fixing hole 43; shrinking oil port 44; guide matching groove 45; first boss 46; second boss 47; frame 50; movable template 51; rear template 52; mold transfer connecting base 53. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0037] Embodiment 1

[0038] Reference Figures 1 to 6 And attached Fig.10 As shown, the utility model provides a double-mold shifting cylinder, including a support seat 10 and two symmetrically distributed cylinder bodies 30, a mold shifting piston rod 38 is arranged in the cylinder body 30, a fixing sleeve 31 is fixedly connected to one end of the cylinder body 30, a groove is arranged in the middle of the fixing sleeve 31, a covering bearing groove 12 is arranged at the upper end of the support seat 10, a cylinder body 30 is arranged in the covering bearing groove 12, a shrinking cover 32 is arranged at the right end of the cylinder body 30, an elongating cover 33 is arranged at the left end of the cylinder body 30, and a butt shoulder 39 is arranged at the right end of the mold shifting piston rod 38;

[0039] The diameter of the docking shoulder 39 is smaller than the die-shifting piston rod 38. A limit groove for easy installation is provided between the die-shifting piston rod 38 and the docking shoulder 39. The double die-shifting cylinder is integrally assembled on the die-casting machine through the support seat 10. The two symmetrically arranged cylinder bodies 30 and the die-shifting piston rod 38 can provide two parallel axial forces during operation, which can avoid the concentration of the die-shifting axial force applied to the die-casting machine by the die-shifting cylinder during the die-shifting action, thereby dispersing the axial force and elastic deformation of the die-casting template by the die-shifting cylinder, reducing the possibility of local structural fatigue and reduced strength of the die-casting template during the die-shifting action, and improving the force stability of the die-casting machine's die-shifting template when opening and closing the die; reducing the possibility of the die-casting machine's die-casting mold shifting template being affected by elastic deformation and affecting the opening and closing matching accuracy of the die-casting mold on the die-casting mold shifting template, thereby improving the service life of the die-casting machine's die-casting mold shifting template, and improving the opening and closing efficiency of the die-casting machine's die-casting mold shifting template.

[0040] Reference Figures 7 to 10 As shown, an oil chamber 40 is provided in the oil cylinder body 30, a piston 41 is slidably connected in the oil chamber 40, the left end of the mold shifting piston rod 38 is fixedly connected to the piston 41, the right end of the oil chamber 40 is slidably connected to the contraction cover 32, and the left end of the oil chamber 40 is slidably connected to the extension cover 33;

[0041] The shrinking cover 32 and the extending cover 33 are arranged on both sides of the cylinder body 30. The connection between the shrinking cover 32 and the cylinder body 30 is a detachable connection, which can facilitate the convenient removal and replacement of the new shrinking cover 32 when the mold shifting cylinder is damaged or fails during use, thereby improving the convenience of repairing and inspecting the mold shifting cylinder failure and reducing the possibility of the mold shifting cylinder failure reducing the working efficiency of the die-casting machine.

[0042] See attached Figure 8 and attached Fig.11 As shown, an extension oil port 42 is provided in the extension cover 33, and the extension oil port 42 is communicated with the oil chamber 40. The extension oil port 42 is located in the radial direction of the extension cover 33, and the rodless chamber at the left end of the oil chamber 40 is communicated with the hydraulic pipeline through the extension oil port 42. A second boss 47 is provided at the right end of the extension cover 33, and the second boss 47 is sealed with the oil chamber 40. The left end of the oil chamber 40 is slidably connected to the second boss 47;

[0043] The extension cover 33 is fixed to the cylinder body 30 via the second boss 47, which can improve the sealing performance and connection rigidity of the detachable fit between the extension cover 33 and the cylinder body 30, improve the convenience of disassembly and assembly of the structural maintenance of various components installed in the oil chamber 40, improve the stability of the mold shifting cylinder's oil pressure transmission to provide mold shifting power, and improve the service life of the mold shifting cylinder.

[0044] A group of evenly distributed docking fixing holes 43 are provided in the circumferential direction of the elongated cover 33. A cover fixing seat 35 is fixedly connected to the left end of the cylinder body 30. A group of identical docking fixing holes 43 are provided on the cover fixing seat 35. The cover fixing seat 35 is located on the right side of the elongated cover 33. Bolts are provided in the docking fixing holes 43. The elongated cover 33 is fixedly connected to the cover fixing seat 35 through the bolts in the docking fixing holes 43.

[0045] The cover fixing seat 35 can fix the matching state between the cylinder body 30 and the extension cover 33, improve the stability of the sealing structure of the mold shifting cylinder and the overall structural rigidity of the cylinder, reduce the impact of vibration and impact on the sealing performance of the mold shifting cylinder, and increase the service life of the mold shifting cylinder.

[0046] See attached Fig. 9 , Attachment Fig.12 And attached Fig.13 As shown, the left end of the shrink cover 32 is provided with a first boss 46, the right end of the oil chamber 40 is slidably connected to the first boss 46, and the shrink cover 32 is fixedly connected to the cylinder body 30 through the first boss 46;

[0047] The first boss 46 can improve the convenience of the installation of the sealing structure, improve the force stability of the connection between the shrinking cover 32 and the cylinder body 30, and the first boss 46 can improve the sealing performance of the detachable connection between the shrinking cover 32 and the cylinder body 30.

[0048] The right end of the oil cylinder body 30 is fixedly connected to an identical cover fixing seat 35 , and a group of identical docking fixing holes 43 are provided in the circumferential direction of the shrinkable cover 32 , and the shrinkable cover 32 is fixedly connected to the cover fixing seat 35 through the docking fixing holes 43 .

[0049] See attached Fig. 9 and attached Fig.13 As shown, a guide matching groove 45 is provided in the shrink cover 32, and a mold shifting piston rod 38 is slidably connected in the right end wall of the guide matching groove 45, and the mold shifting piston rod 38 passes through the right end wall of the guide matching groove 45. A shrinking oil port 44 is provided in the side wall in the circumferential direction of the guide matching groove 45, and the shrinking oil port 44 is located in the radial direction of the shrink cover 32. The shrinking oil port 44 is communicated with the oil chamber 40, and the rod chamber at the right end of the oil chamber 40 is communicated with the hydraulic pipeline through the shrinking oil port 44;

[0050] The shrink cover 32 cooperates with the mold shifting piston rod 38 by opening a through hole in the right end wall of the guide matching groove 45. When the mold shifting piston rod 38 drives the mold shifting plate to open and close the mold, it is convenient to provide guidance and adjust the guiding state of the sliding matching of the mold shifting piston rod 38. The detachable connection between the shrink cover 32 and the oil cylinder body 30 can improve the convenience of positioning and adjusting the axial movement guide of the mold shifting plate opening and closing, improve the sliding matching guiding accuracy of the piston 41 fixed to the mold shifting piston rod 38 in the oil chamber 40, and reduce the coaxiality error between the mold shifting piston rod 38 and the oil cylinder body 30. The piston 41 and the mold shifting piston rod 38 are affected. The possibility of the axial guiding accuracy of the mold piston rod 38 being reduced, the fitting clearance between the mold shifting piston rod 38 and the shrinkage cover 32 is improved, the convenience of adjusting the assembly accuracy between the mold shifting piston rod 38 and the piston 41 is reduced, the influence of the fitting clearance on the coaxiality between the piston 41, the mold shifting piston rod 38 and the cylinder body 30 is reduced, the fitting sealing between the piston 41 and the cylinder body 30 is improved, the stability of the axial force supply of the mold shifting cylinder is improved, and the possibility of oil pressure leakage caused by the fitting clearance between the piston 41 and the mold shifting piston rod 38 and the cylinder body 30 is reduced.

[0051] See attached Figure 1 To Attachment Figure 5 As shown, two groups of left-right symmetrical covering mounting holes 16 and covering positioning holes 15 are provided at the upper end of the support seat 10, and a covering bearing 20 is provided on the upper side of the support seat 10. The left and right ends of the covering bearing 20 are provided with the same covering mounting holes 16 and covering positioning holes 15. The lower end of the covering bearing 20 is provided with an identical covering bearing groove 12. The covering bearing groove 12 cooperates with the fixing sleeve 31. The covering bearing 20 is fixedly connected to the support seat 10 through the covering positioning holes 15 and the covering mounting holes 16.

[0052] The middle groove of the fixing sleeve 31 cooperates with the covering bearing groove 12 of the upper end of the supporting seat 10 and the lower end of the covering bearing 20, limiting the axial sliding of the fixing sleeve 31 and the cylinder body 30 on the covering bearing groove 12. The covering bearing 20 and the supporting seat 10 are fixed to each other through the covering mounting hole 16 and the threaded connection and limit the middle groove of the fixing sleeve 31, thereby fixing the installation position of the fixing sleeve 31 and the cylinder body 30 on the supporting seat 10, increasing the area of ​​the force contact surface of the supporting seat 10 for supporting the cylinder body 30 and the fixing sleeve 31, and improving the installation stability of the mold shifting cylinder on the die-casting machine.

[0053] A group of bearing bush limiting holes 13 evenly distributed in the circumferential direction are provided at the right end of the cover bearing bush 20, a group of identical bearing bush limiting holes 13 are provided at the right end of the support seat 10, and two left-right symmetrical supporting positioning surfaces 14 are provided on the lower end surface of the support seat 10, and key grooves 17 and supporting mounting holes 11 are provided on the two supporting positioning surfaces 14;

[0054] The support seat 10 is positioned and installed on the die-casting machine through the support positioning surface 14 and the support installation hole 11, and a matching key is set at the installation position on the die-casting machine to cooperate with the keyway 17, so as to limit the plane movement of the support positioning surface 14 at the installation position on the die-casting machine, thereby improving the installation accuracy and installation stability of the mold-shifting cylinder on the die-casting machine. The cover bearing 20 is positioned at the upper end of the support seat 10 through the cover positioning hole 15 and aligned with the cover bearing 20 and the bearing limit hole 13 on the end face of the support seat 10. The fixing sleeve 31 is fixed with the cover bearing 20 and the cylinder body 30 through the bearing limit hole 13 to limit the installation angle of the fixing sleeve 31 and the cylinder The cylinder body 30 is deflected in the circumferential direction, and the contact area of ​​the fixed sleeve 31 at the end surface of the support seat 10 and the cover bearing groove 12 is increased, thereby increasing the force bearing area of ​​the cylinder body 30 and the fixed sleeve 31 to which the axial reaction force is applied, and reducing the possibility that the mold shifting cylinder is deformed by the reaction force in the process of providing power for opening and closing the mold, thereby reducing its power accuracy and structural damage; the bearing area and installation accuracy of the mold opening and closing reaction force applied to the cylinder body 30 and the fixed sleeve 31 are increased, the parallelism of the symmetrical arrangement of the mold shifting cylinder is improved, the stability of the load force of the mold shifting cylinder is improved, and the service life of the mold shifting cylinder is increased.

[0055] Embodiment 2

[0056] See attached Figures 14 to 17 As shown, the support seat 10 is positioned at the installation position on the frame 50 through the support positioning surface 14, and is fixedly connected to the frame 50 through the support installation hole 11. At the same time, a limit key is installed in the keyway 17 between the matching surfaces of the support seat 10 and the frame 50 to share the force in the contact surface of the support seat 10 installed on the frame 50, thereby improving the supporting strength of the mounting contact surface of the support seat 10 and the frame 50 to withstand the reaction force of the mold shifting cylinder, and improving the installation matching accuracy and reliability between the support seat 10 and the frame 50;

[0057] The rear template 52 and the movable template 51 are slidably connected on the track of the frame 50, and the lower end of the movable template 51 is fixedly connected to two symmetrically distributed mold shifting connecting bases 53. The mold shifting piston rod 38 driven by the oil pressure in the cylinder body 30 is fixedly connected to the extension cover 33 through the docking shoulder 39. The cylinder body 30 and the mold shifting piston rod 38 are located on the lower side of the rear template 52. The pressure oil in the hydraulic pipeline connected to the oil chamber 40 through the extension oil port 42 and the contraction oil port 44 drives the piston 41 and the mold shifting piston rod 38 to extend and contract in the cylinder body 30 respectively, thereby driving the mold shifting connecting base 53 and the movable template 51 to slide forward and reverse on the frame 50, thereby controlling the coordination and separation between the movable template 51 and the rear template 52 during the opening and closing of the die casting machine, thereby improving the smoothness and stability of the opening and closing of the die casting machine, improving the force stability of the opening and closing action between the die casting machine templates, and reducing the influence of the deformation of the die casting machine parts caused by the action of the mold shifting cylinder on the opening and closing coordination accuracy.

[0058] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the utility model, and are not intended to limit the implementation methods of the technology of the utility model in any form. Any technical personnel in this field may make slight changes or replace them with other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the utility model, but they should still be regarded as technologies or embodiments that are essentially the same as the utility model.

[0059] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A double-mold shifting cylinder, comprising a support seat (10) and two symmetrically distributed cylinder bodies (30), wherein a mold shifting piston rod (38) is arranged in the cylinder body (30), a fixing sleeve (31) is fixedly connected to one end of the cylinder body (30), a covering bearing groove (12) is arranged at the upper end of the support seat (10), and the cylinder body (30) is arranged in the covering bearing groove (12), characterized in that: A retractable cover (32) is provided at the right end of the oil cylinder body (30), an elongated cover (33) is provided at the left end of the oil cylinder body (30), and a butt joint shoulder (39) is provided at the right end of the mold transfer piston rod (38).

2. The double mold shifting cylinder according to claim 1, characterized in that: An oil chamber (40) is provided in the cylinder body (30), a piston (41) is slidably connected in the oil chamber (40), the left end of the mold shifting piston rod (38) is fixedly connected to the piston (41), the right end of the oil chamber (40) is slidably connected to the shrinking cover (32), and the left end of the oil chamber (40) is slidably connected to the extending cover (33).

3. The double mold shifting cylinder according to claim 2, characterized in that: An extended oil port (42) is provided in the extended cover (33), the extended oil port (42) is communicated with the oil chamber (40), a second boss (47) is provided at the right end of the extended cover (33), and the left end of the oil chamber (40) is slidably connected to the second boss (47).

4. The double mold shifting cylinder according to claim 3, characterized in that: The elongated cover (33) is provided with a group of evenly distributed docking fixing holes (43) in the circumferential direction; a cover fixing seat (35) is fixedly connected to the left end of the cylinder body (30); the cover fixing seat (35) is located on the right side of the elongated cover (33); bolts are provided in the docking fixing holes (43); and the elongated cover (33) is fixedly connected to the cover fixing seat (35) via the bolts in the docking fixing holes (43).

5. The double mold shifting cylinder according to any one of claims 2 to 4, characterized in that: A first boss (46) is provided at the left end of the shrinkable sealing cover (32), the right end of the oil chamber (40) is slidably connected to the first boss (46), and the shrinkable sealing cover (32) is fixedly connected to the oil cylinder body (30) via the first boss (46).

6. The double mold shifting cylinder according to claim 4, characterized in that: The right end of the oil cylinder body (30) is fixedly connected to an identical cover fixing seat (35), and the shrinkable cover (32) is provided with a group of identical docking fixing holes (43) in the circumferential direction, and the shrinkable cover (32) is fixedly connected to the cover fixing seat (35) via the docking fixing holes (43).

7. The double mold shifting cylinder according to claim 6, characterized in that: A guide matching groove (45) is provided in the shrinkable sealing cover (32), the right end wall of the guide matching groove (45) is slidably connected to the mold shifting piston rod (38), and a shrinking oil port (44) is provided in the side wall in the circumferential direction of the guide matching groove (45), and the shrinking oil port (44) is communicated with the oil chamber (40).

8. The double mold shifting cylinder according to claim 1, characterized in that: The upper end of the support seat (10) is provided with two groups of left-right symmetrical covering installation holes (16) and covering positioning holes (15); the upper side of the support seat (10) is provided with a covering bearing (20); the left and right ends of the covering bearing (20) are provided with the same covering installation holes (16) and covering positioning holes (15); the lower end of the covering bearing (20) is provided with an same covering bearing groove (12).

9. The double mold shifting cylinder according to claim 8, characterized in that: The right end of the cover bearing (20) is provided with a group of bearing limiting holes (13) evenly distributed in the circumferential direction, the right end of the support seat (10) is provided with a group of identical bearing limiting holes (13), and the lower end surface of the support seat (10) is provided with two left-right symmetrical supporting positioning surfaces (14), and the two supporting positioning surfaces (14) are both provided with keyways (17) and supporting mounting holes (11).

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