Operating mechanism of plunger assembly closing-up die
Through the design of the servo-cylinder driving two-stage pressure head and the mold-closing cylinder, the problems of high hydraulic power consumption and long adjustment time in the closing of the plunger assembly are solved, and the closing effect with high accuracy, low energy consumption and strong compatibility is achieved.
Patent Information
- Application Number
- CN202420298857.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-18
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-02-18
AI Technical Summary
The existing plunger assembly closing method has problems such as high hydraulic power consumption, long adjustment time, inability to close the reverse, and poor consistency.
A plunger assembly closing mold working mechanism is designed, and two-stage pressure heads are driven by servo cylinders to accurately lower the pressure closing, combining the mold clamp cylinder and the hoop instead of the traditional hydraulic clamp to achieve fine control and high-efficiency energy consumption management.
It realizes high-precision press-down closure, reduces energy consumption and noise, is compatible with forward and reverse closures, and improves closure consistency and equipment versatility.
Smart Images
Figure CN222471430U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of a plunger component closing device, in particular to a plunger component closing die working mechanism. Background Art
[0002] Axial variable piston pumps are widely used in hydraulic presses, engineering machinery, agricultural machinery, ships and other industries due to their compact structure, small volume per unit power, light weight, high working pressure, high efficiency and convenient adjustment. The plunger assembly is the core component of the axial piston pump, including the plunger and the sliding shoe. Before the plunger assembly is installed on the plunger pump, the plunger sliding shoe must be closed to achieve a ball joint connection.
[0003] There are two common ways to close the plunger assembly, namely, die closing and roller spinning closing. Among them, the axial clearance of products processed by the spinning closing process is relatively large, and it is only suitable for plunger assemblies with low-precision axial clearance requirements. In addition, the spinning process is mostly modified on lathes, with low production efficiency and high requirements on personnel skills.
[0004] The common mold closing method at present is to first close the mold with a fixed mold and then fix the plunger, then place the slipper on the ball head of the plunger, and use the vertically set hydraulic cylinder to drive the pressure head downward to provide pressure to press the slipper and the plunger to close the mold. In the process of the pressure head pressing the slipper down, two hydraulic cylinders are often set in the horizontal direction to close the left and right molds in half to prevent the fixed mold from opening outward during the product extrusion process. This method relies on hard limit to control the extrusion position and cannot be adjusted by numerical control. The adjustment time of the slipper of some structures is long, the adjustment space is small, the assembly gap between the slipper and the plunger is unstable, and it is impossible to reversely close the slipper of the inclined skirt structure. This mold closing method uses hydraulic power in both the mold closing and extrusion processes, which has high energy consumption, high noise, and environmental pollution. In addition, during the process of taking and placing the plunger assembly product, the operator's hand needs to reach into the mold, which poses certain safety risks. Utility Model Content
[0005] In view of the shortcomings in the prior art, the purpose of the utility model is to provide a working mechanism of a plunger assembly closing mold, which has a simple and compact structure, a small space volume, is compatible with forward closing and reverse closing, has high closing precision, does not require hydraulic mold closing, has low mold closing power, and can save more than 50% of energy consumption in the closing process. The utility model can effectively solve the technical problems in the existing crimping assembly method, such as high hydraulic power consumption, long closing adjustment time of the plunger assembly, inability to perform reverse closing on the inclined skirt structure sliding shoe, and poor closing consistency.
[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:
[0007] In one technical solution of the utility model, a plunger assembly closing mold working mechanism is provided, comprising a frame, a servo electric cylinder arranged on the top of the frame, a two-stage pressing head arranged below the servo electric cylinder, and a mold assembly arranged below the two-stage pressing head;
[0008] The mold assembly includes a mold base fixed on the frame, a left and right half mold body is arranged above the mold base, a mold clamping cylinder is respectively arranged on the left and right sides of the mold body, the mold clamping cylinder is fixedly connected to the mold base, the output end of each mold clamping cylinder is respectively fixedly connected to a mold body, and the mold clamping cylinder drives the two mold bodies to open and close in the horizontal direction;
[0009] When the two mold bodies are closed, an accommodating cavity is formed between their inner cavities, in which a clamp is provided. The clamp is coaxial with the two-stage pressing head, and the top of the clamp holds a plunger assembly; the output end of the servo electric cylinder moves downward and abuts against the two-stage pressing head, so as to drive the two-stage pressing head to move downward and abut against the plunger assembly to press down and close the mouth.
[0010] By adopting the above technical solution, the servo electric cylinder is used to provide the two-stage pressure head with the driving force for pressing downward, so that the pressure and the target position of pressing downward can be accurately controlled, and the axial clearance of the plunger assembly during the closing process and the fit between the inner contour of the sliding shoe ball socket and the plunger ball head can be controlled; by setting the mold clamping cylinder to provide pre-closing power for the left and right half-type mold bodies, the two-stage pressure head clamp is sleeved on the outside of the mold body to replace the traditional hydraulic mold clamping, and by setting the two-stage pressure head and the mold clamping cylinder to cooperate together, the energy consumption and noise can be significantly reduced, and the control accuracy and flexibility can be improved in the process of pressing the plunger assembly downward to close the mouth.
[0011] Furthermore, a lifting mechanism is provided below the mold assembly, and the lifting mechanism includes a support frame provided below the frame, a lifting cylinder fixedly connected to the support frame, and a push rod connected to the output end of the lifting cylinder, the push rod is provided above the lifting cylinder, the clamp is fixed to the top of the push rod, and the upper part of the push rod is passed through the interior of the mold base. The installation height of the plunger assembly can be adjusted by providing the lifting mechanism, and the push rod and the clamp are driven to move up and down in the vertical direction by the lifting cylinder to adjust the height of the clamp relative to the mold body, and the lifting mechanism can provide a lifting force during the process of the plunger assembly closing downward to ensure that the plunger ball head and the sliding shoe ball socket are always in close contact.
[0012] Furthermore, a horizontal pressure plate is fixedly connected between the output end of the lifting cylinder and the push rod, and a stop mechanism is provided under the pressure plate. The stop mechanism includes a limit cylinder, a limit seat and a limit pin. The limit cylinder is fixed on the support frame, and the output end of the limit cylinder is connected to the limit seat. The limit pin is vertically fixed above the limit seat, and an avoidance hole for accommodating the limit pin is opened on the pressure plate.
[0013] By setting a stop mechanism, when placing the plunger assembly, the lifting cylinder drives the ejector rod upward to drive the clamp to extend out of the mold body to a fixed position for placing the plunger assembly. At the same time, the limit cylinder drives the limit seat to drive the limit pin to extend forward, and the limit pin is abutted against the lower surface of the pressure plate to limit the height position of the ejector rod and the top plunger assembly, ensuring that the clamp stops at the set position in the accommodating cavity after the mold body is closed, and ensuring the accuracy of the closing position of the sliding shoe. After the plunger assembly is placed in the clamp, the closing work is carried out, the limit cylinder drives the limit seat to drive the limit pin to retract, and move the limit pin to the position below the avoidance hole, and then the servo electric cylinder drives the two-stage pressure head downward to apply pressure to buckle and close the plunger and the sliding shoe. When the plunger assembly, the clamp and the ejector rod are subjected to downward pressure and move slightly downward in the vertical direction, the limit pin can be inserted into the avoidance hole.
[0014] Furthermore, the interior of the push rod and the clamp are both hollow, and a vacuum valve is provided on the lower side wall of the push rod. The vacuum valve is provided to connect to an external vacuum generating device, so that a vacuum is formed inside the push rod and the clamp to firmly adsorb the plunger assembly placed inside the clamp, thereby preventing the plunger assembly from shaking, shifting in position, or falling off the clamp before or after the pressing and closing operation.
[0015] Furthermore, the two-stage pressure head includes a fixed sleeve connected to the frame, a pressure rod sleeved inside the fixed sleeve, a pressure block fixed to the bottom end of the pressure rod, a movable sleeve sleeved between the fixed sleeve and the pressure rod, and a hoop fixed to the bottom end of the movable sleeve, the hoop is located below the fixed sleeve, and is used to be sleeved outside the two mold bodies when the two mold bodies are molded together; the top of the pressure rod extends out of the fixed sleeve and corresponds to the output end position of the servo electric cylinder, and the servo electric cylinder drives the pressure rod to slide up and down inside the fixed sleeve, driving the pressure block to press the plunger assembly downward. By setting the hoop to fit on the outside of the mold body, the inner wall of the hoop contacts the outer wall of the mold body, thereby replacing the mold closing power provided by the special power system outside the mold body, saving the power system cost, and driving the pressure rod to drive the pressure block downward by the servo motor, thereby completing the enclosure between the sliding shoe and the plunger ball head.
[0016] Furthermore, a first spring is sleeved between the pressure rod and the movable sleeve, and the upper and lower ends of the first spring respectively abut against the pressure rod and the movable sleeve; a second spring is sleeved between the movable sleeve and the fixed sleeve, and the upper and lower ends of the second spring respectively abut against the movable sleeve and the fixed sleeve, and the stiffness coefficient of the second spring is smaller than the stiffness coefficient of the first spring, and the movable sleeve can slide up and down inside the fixed sleeve.
[0017] With this technical solution, when the servo electric cylinder drives the pressure rod to press down, because the compression force of the first spring is greater than that of the second spring, the pressure rod transmits pressure through the first spring, drives the movable sleeve to move downward, thereby compressing the second spring, and the hoop moves downward to fit on the outside of the mold body; the servo electric cylinder continues to drive the pressure rod to press down, and the compression force of the second spring begins to be greater than that of the first spring, thereby driving the pressure block to move downward, and the pressure block presses down to abut against the plunger assembly, and then the sliding shoe is buckled and wrapped around the outside of the ball head of the plunger to achieve the buckling and closing effect. By setting the first spring, a certain pressure buffer can also be provided, which improves the stability of the pressure rod's downward pressure, makes the assembly process between the sliding shoe and the plunger smoother, prevents excessive buckling and wear between the assembly surfaces of the two, and improves assembly accuracy.
[0018] Furthermore, a first notch and a second notch are respectively provided on the inner wall and the outer wall of the movable sleeve, for installing a first spring and a second spring respectively; a boss extending outward is provided on the upper ring of the pressure rod, and the bottom surface of the boss abuts against the first spring.
[0019] Furthermore, a closing limit block extending inward is provided on the inner cavity side of the mold body, and the closing limit block is located at the outer ring of the sliding shoe. During the closing process, the closing limit block abuts against the outer side of the sliding shoe, so that the sliding shoe is squeezed and deformed to cover the outside of the ball head of the plunger to form a ball joint connection. When the left and right mold bodies are molded together, the closing limit blocks on the two mold bodies are enclosed in a ring, and the inner diameter of the closing limit block is smaller than the outer diameter of the edge position of the sliding shoe to be closed, so that after the mold is closed, the sliding shoe can be clamped between the closing limit blocks. When the servo electric cylinder drives the pressure rod and the pressure block to press the plunger assembly downward, a force is generated at the position where the closing limit block abuts against the sliding shoe, and the sliding shoe is squeezed and deformed due to the limiting effect of the closing limit block, forming a ball socket matching the shape of the plunger ball head and covering the outside of the plunger ball head. The utility model can adjust the inner diameter and shape of the closing limit block according to actual needs, so that during the closing process, an appropriate axial clearance is maintained between the plunger and the sliding shoe, thereby improving the rotation flexibility of the plunger ball head inside the sliding shoe.
[0020] Furthermore, the frame includes a top plate, a middle plate and a bottom plate, which are connected and fixed by four pillars, the servo electric cylinder is fixed on the top plate, the two-stage pressure head is connected to the middle plate, and the mold assembly is arranged on the bottom plate.
[0021] Furthermore, a transverse mechanism is provided below the middle plate, and the transverse mechanism includes a transverse cylinder fixedly connected to the middle plate, two parallel guide rails, a slider slidably mounted on the outside of the guide rails, and a movable plate fixedly connected to the two sliders, the two guide rails are horizontally arranged below the middle plate, and the two ends of the guide rails are respectively fixedly connected to the middle plate, the piston rod of the transverse cylinder is parallel to the guide rails and the front end of the piston rod is fixedly connected to the movable plate, and the movable plate is fixedly connected to the two-stage pressing head. By setting the transverse mechanism, the position of the two-stage pressing head can be adjusted in the horizontal direction, the manual and automatic operation space can be reserved, and the servo electric cylinder stroke can be reduced, saving the mechanism action time and the overall space volume of the device. Driven by the transverse cylinder, the piston rod retracts in the horizontal direction, thereby driving the movable plate and the slider to slide along the guide rail, thereby driving the two-stage pressing head to adjust its position in the horizontal direction, thereby adjusting the position of the two-stage pressing head relative to the upper servo electric cylinder and the lower mold assembly.
[0022] The beneficial effects of the utility model are as follows:
[0023] The utility model provides the power of pressing downward during the closing process by setting a servo electric cylinder, and can accurately control the axial clearance of the plunger assembly during the closing process and the fit between the inner contour of the sliding shoe ball socket and the plunger ball head; by setting a two-stage pressure head, the hoop cover is closed on the outside of the mold body, which can reduce the mold closing power required for the mold body and save the power system cost; by replacing the traditional oil cylinder with the hoop of the mold closing cylinder and the two-stage pressure head, the energy consumption and working noise can be reduced; by setting a lifting mechanism, the initial placement height of plunger assemblies of different types and varieties can be flexibly adjusted, which increases the versatility and flexibility of the equipment, and can also provide a lifting force during the downward closing process of the plunger assembly to ensure that the plunger ball head and the sliding shoe ball socket are always in fit; by setting a stop mechanism, a certain supporting force can be provided for the lifting mechanism, so that the plunger assembly can stay in the middle position inside the accommodating cavity of the mold body; by setting a transverse movement mechanism, the position of the two-stage pressure head can be adjusted in the horizontal direction, while retaining the space for manual and automatic operation, the stroke of the servo electric cylinder can be reduced, that is, the mechanism action time and the overall spatial volume of the device are saved.
[0024] The working mechanism of the plunger assembly closing mold provided by the utility model has a simple and compact structure, a small space volume, is compatible with forward closing and reverse closing, is suitable for closing plunger assemblies of various materials, sizes and structures, has strong versatility, does not require hydraulic mold closing, has low mold closing power, can save more than 50% of energy consumption in the closing process, has high buckling and closing accuracy, is easy to perform automated digital and logic control, and is simple, convenient and safe to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0026] Figure 1 It is a three-dimensional structural schematic diagram of the working mechanism of the closing mold of the plunger assembly in the utility model;
[0027] Figure 2 yes Figure 1 A partial enlarged view of the area “A”;
[0028] Figure 3 It is another three-dimensional structural schematic diagram of the working mechanism of the closing mold of the plunger assembly of the utility model;
[0029] Figure 4 It is another three-dimensional structural schematic diagram of the working mechanism of the closing mold of the plunger assembly of the utility model;
[0030] Figure 5 It is a front view of the working mechanism of the closing die of the plunger assembly in the utility model;
[0031] Figure 6 It is a three-dimensional structural schematic diagram of the mold assembly in the utility model;
[0032] Figure 7 It is a schematic diagram of the internal cross-sectional structure of the mold assembly in the utility model;
[0033] Figure 8 It is a schematic diagram of the connection structure of the lifting mechanism and the mold assembly when the utility model is closed in the positive direction;
[0034] Fig. 9 It is a schematic diagram of the internal structure of the lifting mechanism and the mold assembly when the utility model is closed in the forward direction;
[0035] Fig.10 yes Fig. 9 A partial enlarged view of the area "B" in the middle;
[0036] Fig.11 It is a schematic diagram of the connection structure of the lifting mechanism and the mold assembly when the utility model is reversely closed;
[0037] Fig.12 It is a schematic diagram of the internal structure of the lifting mechanism and the mold assembly when the utility model is reversely closed;
[0038] Fig.13 It is a schematic diagram of the internal structure of the two-stage pressure head after cutting in the utility model;
[0039] Fig.14 It is a schematic diagram of the internal structure of the two-stage pressure head in the utility model when the pressure rod is pressed down;
[0040] Fig.15 It is a three-dimensional structural schematic diagram of the transverse movement mechanism in the utility model in the working position;
[0041] Fig.16 It is a three-dimensional structural schematic diagram of the transverse movement mechanism in the utility model in a non-working position;
[0042] Fig.17 It is a three-dimensional structural schematic diagram of the lifting mechanism and the stopper mechanism during reverse closing in the utility model;
[0043] Fig.18 It is a three-dimensional structural schematic diagram of the jacking mechanism and the stopper mechanism during the forward closing of the utility model.
[0044] Description of the numbers in the figure:
[0045] 1. Frame; 11. Top plate; 12. Middle plate; 13. Bottom plate; 14. Pillar; 15. Safety grating; 16. Lighting lamp group; 2. Servo electric cylinder; 21. Electric cylinder guide rod; 22. Guide shaft mounting plate; 3. Two-stage pressure head; 31. Fixed sleeve; 32. Pressure rod; 321. Boss; 322. Slot; 33. Pressure block; 331. Clamp; 34. Movable sleeve; 341. First notch; 342. Second notch; 35. Hoop; 36. First spring; 37. Second spring; 38. Pressure sensor; 4. Mold assembly; 41. Mold base; 42. Mold body; 421 , closing limit block; 43, mold clamping cylinder; 44, accommodating chamber; 45, fixture; 5, lifting mechanism; 51, support frame; 52, lifting cylinder; 53, ejector rod; 54, pressure plate; 541, avoidance hole; 55, guide shaft; 56, vacuum valve nozzle; 57, bottom connecting plate; 6, transverse mechanism; 61, transverse cylinder; 611, piston rod; 62, guide rail; 63, slider; 64, moving plate; 65, limit screw; 66, buffer; 7, stop mechanism; 71, limit cylinder; 72, limit seat; 73, limit pin; 100, plunger assembly; 101, plunger; 102, slipper. DETAILED DESCRIPTION
[0046] The following is a specific embodiment of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, it does not mean that the features of this utility model are limited to the embodiment.
[0047] In the description of this embodiment, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. The terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0048] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.
[0049] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.
[0050] refer to Figure 1 In one embodiment of the utility model, a plunger assembly closing mold working mechanism is provided, including a frame 1, a servo electric cylinder 2 arranged on the top of the frame 1, a two-stage pressing head 3 arranged below the servo electric cylinder 2, and a mold assembly 4 arranged below the two-stage pressing head 3.
[0051] Specifically, refer to Figure 2 , Figure 3 and Figure 6 The mold assembly 4 includes a mold base 41 fixed on the frame 1, and a left and right half mold body 42 is provided above the mold base 41. A mold closing cylinder 43 is provided on the left and right sides of the mold body 42 respectively. The mold closing cylinder 43 is fixedly connected to the mold base 41, and the output end of each mold closing cylinder 43 is fixedly connected to a mold body 42 respectively. The mold closing cylinder 43 drives the two mold bodies 42 to close inwardly in the horizontal direction towards each other for mold closing or to open outwardly in the opposite direction for mold opening, which can save energy consumption and reduce noise.
[0052] refer to Figure 7 and Fig. 9 When the two mold bodies 42 are closed, the inner cavities of the two mold bodies 42 are enclosed to form a receiving cavity 44, in which a clamp 45 is arranged. The clamp 45 is coaxial with the two-stage pressure head 3, and the top of the clamp 45 holds the plunger assembly 100. Figure 5 The output end of the servo electric cylinder 2 moves downward and abuts against the two-stage pressure head 3, which is used to drive the two-stage pressure head 3 to move downward and abut against the plunger assembly 100 to press down and close. The axial clearance during the closing process of the plunger assembly 100 and the fit between the ball socket of the sliding shoe 102 and the inner contour of the ball head of the plunger 101 can be accurately controlled.
[0053] refer to Figure 1 and Figure 3 A lifting mechanism 5 is provided below the mold assembly 4 to adjust the installation height of the plunger assembly 100. The lifting mechanism 5 includes a support frame 51 provided below the frame 1, a lifting cylinder 52 fixedly connected to the support frame 51, and a push rod 53 connected to the output end of the lifting cylinder 52. The push rod 53 is provided above the lifting cylinder 52, and the clamp 45 is fixed to the top of the push rod 53. The clamp 45 can be made of plastic material to avoid hard friction scratches on the surface of the plunger assembly. The upper part of the push rod 53 is penetrated into the interior of the mold base 41. The push rod 53 and the clamp 45 are driven to move up and down in the vertical direction by the lifting cylinder 52 to adjust the height of the clamp 45 relative to the mold body 42.
[0054] refer to Fig. 9 , Fig.12 and Fig.17 In the present invention, both the ejector pin 53 and the fixture 45 are provided with a hollow passage, and a vacuum valve 56 communicating with the hollow passage is provided on the lower side wall of the ejector pin 53. The vacuum valve 56 communicates with an external vacuum generating device, thereby forming a vacuum inside the ejector pin 53 and the fixture 45 to firmly adsorb the plunger assembly 100 placed inside the fixture 45, thereby preventing the plunger assembly from shaking, shifting in position, or falling off from the fixture 45 before or after the pressing and closing operation.
[0055] refer to Fig.17 and Fig.18 A horizontal pressing plate 54 is fixedly connected between the output end of the lifting cylinder 52 and the push rod 53, and four guide shafts 55 are slidably penetrated at the bottom of the support frame 51. The tops of the four guide shafts 55 are fixedly connected to the pressing plate 54, and the bottoms are fixedly connected to a bottom connecting plate 57. The provision of the guide shafts 55 can improve the movement stability of the lifting cylinder 52 driving the push rod 53 to move up and down.
[0056] refer to Figure 3 , Fig.17 and Fig.18A stop mechanism 7 is provided below the pressure plate 54, and the stop mechanism 7 includes a limit cylinder 71, a limit seat 72 and a limit pin 73. The limit cylinder 71 is fixed on the support frame 51, and the output end of the limit cylinder 71 is connected to the limit seat 72. The limit pin 73 is vertically fixed above the limit seat 72, and an avoidance hole 541 for accommodating the limit pin 73 is opened on the pressure plate 54. When placing the plunger assembly 100, the lifting cylinder 52 drives the push rod 53 upward to drive the clamp 45 to extend out of the mold body 42 to a fixed position for placing the plunger assembly 100. At the same time, the limit cylinder 71 drives the limit seat 72 to drive the limit pin 73 to extend forward, and the limit pin 73 abuts against the lower surface of the pressure plate 54 to limit the height position of the push rod 53 and the top plunger assembly 100, ensuring that the clamp 45 stops at the set position in the accommodating cavity 44 after the mold body 42 is closed, ensuring the accuracy of the closing position of the sliding shoe 102. When the plunger assembly 100 is placed on the fixture 45 and the closing work is carried out, the limit cylinder 71 drives the limit seat 72 to drive the limit pin 73 to retract, and moves the limit pin 73 to the position below the avoidance hole 541, and then the servo electric cylinder 2 drives the two-stage pressure head 3 downward to apply pressure downward to buckle the plunger 101 and the sliding shoe 102 to close the mouth. The plunger assembly 100, the fixture 45 and the push rod 53 are simultaneously subjected to downward pressure. When they move downward slightly in the vertical direction, the limit pin 73 passes through the inside of the avoidance hole 541 for avoidance.
[0057] refer to Figures 13 to 15 The two-stage pressing head 3 includes a fixed sleeve 31 connected to the frame 1 through a movable plate 64, a pressing rod 32 sleeved inside the fixed sleeve 31, a pressing block 33 fixed to the bottom end of the pressing rod 32, a movable sleeve 34 sleeved between the fixed sleeve 31 and the pressing rod 32, and a hoop 35 fixed to the bottom end of the movable sleeve 34. The hoop 35 is located below the fixed sleeve 31, the inside of the hoop 35 is hollow and both ends are open, the hoop 35 is cylindrical, and its inner diameter is larger than the outer diameter of the pressing rod 32, and is used to be sleeved outside the two mold bodies 42 when the two mold bodies 42 are molded. The inside of the fixed sleeve 31 is hollow and both ends are open, the top of the pressing rod 32 extends out of the fixed sleeve 31 and corresponds to the output end position of the servo electric cylinder 2, and the servo electric cylinder 2 drives the pressing rod 32 to slide up and down inside the fixed sleeve 31, driving the pressing block 33 to press the plunger assembly 100 downward. By providing a hoop 35 for fitting on the outside of the mold body 42, the inner wall of the hoop 35 contacts the outer wall of the mold body 42, so that the power system specially arranged outside the mold body 42 can provide the mold closing power, saving the power system cost, and the servo motor 2 drives the pressure rod 32 to drive the pressure block 33 to press down, thereby completing the enclosure between the ball socket of the sliding shoe 102 and the ball head of the plunger 101.
[0058] refer to Fig.13A first spring 36 is sleeved between the pressure rod 32 and the movable sleeve 34, and the upper and lower ends of the first spring 36 abut against the pressure rod 32 and the movable sleeve 34 respectively. A second spring 37 is sleeved between the movable sleeve 34 and the fixed sleeve 31, and the upper and lower ends of the second spring 37 abut against the movable sleeve 34 and the fixed sleeve 31 respectively. The spring coefficient of the second spring 37 is smaller than the spring coefficient of the first spring 36. The movable sleeve 34 can slide up and down inside the fixed sleeve 31, and relative sliding can occur between the movable sleeve 34 and the pressure rod 32. A first notch 341 and a second notch 342 are respectively provided on the inner wall and the outer wall of the movable sleeve 34, respectively, for installing the first spring 36 and the second spring 37. A boss 321 extending outward is provided on the upper part of the pressure rod 32, and the bottom surface of the boss 321 abuts against the first spring 36.
[0059] When the servo electric cylinder 2 drives the pressure rod 32 downward, because the compression force of the first spring 36 is greater than the second spring 37, the pressure rod 32 transmits pressure through the first spring 36, drives the movable sleeve 34 to move downward, thereby compressing the second spring 37, and the hoop 35 moves downward to fit on the outside of the mold body 42. The servo electric cylinder 2 continues to drive the pressure rod 32 downward, and the compression force of the second spring 37 begins to be greater than the first spring 36, thereby driving the pressure block 33 to move downward (refer to Fig.14 ), the pressing block 33 is pressed down to abut the plunger assembly 100 (if the closing is in the forward direction, the plunger 101 is installed in the clamp 45, the sliding shoe 102 is inverted above the plunger 101, and the pressing block 33 is pressed down to abut the sliding shoe 102. If the closing is in the reverse direction, the sliding shoe 102 is installed in the clamp 45, the plunger 101 is inverted above the sliding shoe 102, and the pressing block 33 is pressed down to abut the tail of the plunger 101), and then the sliding shoe 102 is buckled and wrapped around the outside of the ball head of the plunger 101 to achieve the buckling and closing effect. By setting the first spring 36, a certain pressure buffer can also be provided to improve the stability of the downward pressing of the pressure rod 32, so that the assembly process between the sliding shoe 102 and the plunger 101 is smoother, and excessive buckling wear between the assembly surfaces of the two is prevented, thereby improving the assembly accuracy.
[0060] refer to Fig.10 and Fig.12A closing limit block 421 extending inward is provided on the inner cavity side of the mold body 42, and the closing limit block 421 is located on the outer ring of the sliding shoe 102. During the closing process, the closing limit block 421 abuts against the outer side of the sliding shoe 102, causing the sliding shoe 102 to be squeezed and deformed to cover the outside of the ball head of the plunger 101 to form a ball joint connection. When the left and right mold bodies 42 are molded together, the closing limit blocks 421 on the two mold bodies 42 are enclosed in a ring shape, and the inner diameter of the closing limit block 421 is smaller than the outer diameter of the edge position of the shoe 102 to be closed, so that after the mold is closed, the shoe 102 can be clamped between the closing limit blocks 421. When the servo electric cylinder 2 drives the pressure rod 32 and the pressure block 33 to press the plunger assembly 100, the outer periphery of the shoe 102 and the closing limit block 421 resist the force, and the shoe 102 is squeezed and deformed due to the limiting effect of the closing limit block 421, forming a ball socket matching the shape of the ball head of the plunger 101 and covering the outside of the ball head of the plunger 101. In addition, the utility model can adjust the inner diameter and shape of the closing limit block 421 according to actual needs, so that during the closing process, an appropriate amount of axial clearance is maintained between the plunger 101 and the shoe 102, thereby improving the rotation flexibility of the ball head of the plunger 101 inside the shoe 102.
[0061] The side surface of the closing limit block 421 in the utility model corresponding to the outer side surface of the sliding shoe 102 is an inclined surface or a curved surface, which can be rotated according to the side shape of the sliding shoe 102, and is suitable for straight-mouthed or oblique-skirt sliding shoes, so that the sliding shoe 102 can form a ball socket that matches the shape of the ball head of the plunger 101.
[0062] refer to Figure 1 and Figure 3 The frame 1 includes a top plate 11, an intermediate plate 12 and a bottom plate 13. The top plate 11, the intermediate plate 12 and the bottom plate 13 are connected and fixed by four pillars 14. The servo electric cylinder 2 is fixed on the top plate 11. The two-stage pressing head 3 is connected to the intermediate plate 12. The mold assembly 4 is arranged on the bottom plate 13. The two-stage pressing head 3 is located below the intermediate plate 12. The intermediate plate 12 is provided with a window for the pressing rod 32 to extend out of the intermediate plate 12 (refer to Fig.15 ), the top of the pressure rod 32 corresponds to the output shaft position of the servo cylinder 2. Figure 1 The top plate 11 is slidably mounted with an electric cylinder guide rod 21 in the vertical direction. The bottom of the electric cylinder guide rod 21 is fixedly connected to the output shaft of the servo electric cylinder 2 through the guide shaft mounting plate 22 to form a synchronous linkage. In this way, during the operation of the servo electric cylinder 2, the piston output shaft of the servo electric cylinder 2 is guided in the vertical direction and the stability of the movement is improved. Figure 3 A pressure sensor 38 can also be set at the bottom of the output end of the servo electric cylinder 2. When the servo electric cylinder 2 presses the driving pressure rod 32 downward to move downward, it is used to sense and detect the driving pressure of the servo electric cylinder 2 to avoid excessive pressure damaging the two-stage pressure head 3 and the plunger assembly 100.
[0063] refer to Figure 5 A lateral movement mechanism 6 is provided below the middle plate 12, which can adjust the position of the two-stage pressure head 3 in the horizontal direction, retaining the space for manual and automatic operation, reducing the stroke of the servo electric cylinder, saving the mechanism action time and the overall space volume of the device. Fig.15 and Fig.16 The transverse mechanism 6 includes a transverse cylinder 61 fixedly connected to the middle plate 12, two parallel guide rails 62, a slider 63 slidably sleeved on the outside of the guide rails 62, and a movable plate 64 fixedly connected to the two sliders 63. The two guide rails 62 are horizontally arranged below the middle plate 12, and the two ends of the guide rails 62 are respectively fixedly connected to the middle plate 12. The piston rod 611 of the transverse cylinder 61 is parallel to the guide rails 62 and the front end of the piston rod 611 is fixedly connected to the movable plate 64. The movable plate 64 is fixedly connected to the fixed sleeve 31 in the two-stage ram 3. Driven by the transverse cylinder 61, the piston rod 611 is extended and retracted in the horizontal direction, thereby driving the movable plate 64 and the slider 63 to slide along the guide rails 62, thereby driving the two-stage ram 3 to adjust its position in the horizontal direction, thereby adjusting the position of the two-stage ram 3 relative to the upper servo electric cylinder 2 and the lower mold assembly 4.
[0064] When performing the closing operation, the two-stage ram 3 is driven to move horizontally through the transverse mechanism 6 to ensure that the closing working mechanism of the two-stage ram 3, the servo electric cylinder 2 and the mold assembly 4 are located on the same central axis, and the output end of the servo electric cylinder 2 is coaxial with the pressure rod 32 and the plunger assembly 100, and the downward pressure is balanced to ensure the accuracy of the closing. When the plunger assembly 10 is pre-installed or the plunger assembly 100 needs to be removed after the closing process is completed, the two-stage ram 3 can be driven to move horizontally through the transverse mechanism 6 to leave space for manual operation, thereby reducing the volume of the entire plunger assembly closing mold working mechanism, saving space and energy consumption. Reference Fig.15 A limit screw 65 and a buffer 66 are also fixed below the middle plate 12 at a position between the two guide rails 62. The limit screw 65 and the buffer 66 are both located at the same horizontal position as the movable plate 64. The limit screw 65 serves to limit the moving position of the movable plate 64. When the limit screw 65 collides with the movable plate 64, the buffer 66 serves to buffer and reduce shock.
[0065] refer to Fig.13 and Fig.14 A clamping piece 331 extending upward can be provided above the pressing block 33 in the utility model, and a clamping groove 322 opening downward is provided at the bottom end of the pressing rod 32. The clamping piece 331 is inserted into the inside of the clamping groove 322 to form an interference fit with it to realize the fixed connection between the pressing rod 32 and the pressing block 33.
[0066] refer to Figure 1 and Figure 5In the present invention, a beam-type safety grating 15 can be installed opposite to each other on the two pillars 14 on the front side of the mold assembly 4, i.e., on the side close to the operating station, to improve the safety of operation and form an infrared beam in the middle. During the operation of the equipment, if an operator accidentally reaches into the mold assembly device and blocks the beam, the safety grating transmits a signal to control the equipment to stop running, thus playing the role of emergency stop and safety protection. Figure 3 and Figure 4 A lighting group 16 is provided on the rear side of the mold assembly 4, that is, the side away from the operating station. The lighting group 16 is fixed on the middle plate 12 to provide a lighting environment.
[0067] The plunger assembly 100 includes a plunger 101 or a sliding shoe 102. When the plunger 101 or the sliding shoe 102 is assembled in a positive package manner (refer to Figures 8 to 10 ), the plunger 101 is clamped in the fixture 45, the sliding shoe 102 is buckled on the ball head of the plunger 101, and the two-stage pressure head 3 presses down the sliding shoe 102 to close the end. When the reverse package method is used for closing the end (refer to Fig.11 and Fig.12 ), the sliding shoe 102 is clamped in the fixture 45, the ball socket of the sliding shoe 102 faces upward, the ball head of the plunger 101 is buckled in the ball socket of the sliding shoe 102, and the two-stage pressure head 3 presses down the plunger 101 to close the end. The plunger assembly closing mold working mechanism provided by the utility model can be used for both the positive closing of the plunger assembly and the reverse closing of the plunger assembly, and can be compatible with both positive closing and reverse closing methods, with high flexibility and wide application range.
[0068] When the working mechanism of the plunger assembly closing mold provided by the utility model is working:
[0069] (1) When placing the plunger assembly 100, firstly, the jacking cylinder 52 is used to drive the ejector rod 53 upward to drive the clamp 45 to extend out of the mold body 42, so that the operator can manually place the plunger assembly 100 on the clamp 45. At the same time, the vacuum generating device is started to firmly adsorb the plunger assembly 100 into the clamp 45.
[0070] (2) When performing the closing operation, the lateral cylinder 61 drives the two-stage ram 3 to move along the guide rail 62 to the top of the plunger assembly 100; the lifting cylinder 52 drives the ram 53 and the clamp 45 to drive the plunger assembly 100 to move downward to the closing position of the specified height. At the same time, the limit cylinder 71 drives the limit pin 73 to abut against the lower surface of the pressure plate 54 for limiting. The mold closing cylinder 43 drives the left and right mold bodies 42 to move inward to close the mold, so that the closing limit block 421 is sleeved on the outside of the position to be closed of the sliding shoe 102, the lower part of the plunger assembly 100 is located in the accommodating cavity 44, and the upper part of the plunger assembly 100 extends out of the mold body 42; the servo electric cylinder 2 drives the two-stage ram 3 to apply pressure downward, the hoop 35 is sleeved on the outside of the mold body 42 after the mold is closed, and the pressure block 33 presses down to abut against the plunger assembly 100, and the ball head of the plunger 101 and the ball socket of the sliding shoe 102 are buckled and closed.
[0071] (3) After the closing is completed, the output end of the servo electric cylinder 2 retracts and disengages from the pressure rod 32, and the two-stage pressure head 3 returns to its original position under the self-rebound force of the first spring 36 and the second spring 37, so that the hoop 35 is separated from the mold body 42, and the pressure block 33 is separated from the plunger assembly 100. The two-stage pressure head 3 is driven by the transverse cylinder 61 to move along the guide rail 62 to the non-working position on the right side; the mold closing cylinder 43 drives the left and right mold bodies 42 to open outward, and then the lifting cylinder 52 drives the push rod 53 upward again to drive the clamp 45 to move upward, thereby sending out the plunger assembly 100 that has completed the closing, and the vacuum generating device stops working, releasing the vacuum suction at the bottom of the plunger assembly 100, and the operator can directly manually remove the plunger assembly 100, thereby completing the closing operation of the entire plunger assembly.
[0072] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Therefore, any technical solution that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.
Claims
1. A plunger assembly closing mold working mechanism, characterized in that: It comprises a frame (1), a servo electric cylinder (2) arranged on the top of the frame (1), a two-stage pressing head (3) arranged below the servo electric cylinder (2), and a mold assembly (4) arranged below the two-stage pressing head (3); The mold assembly (4) comprises a mold base (41) fixed on the frame (1); a mold body (42) in left and right halves is provided above the mold base (41); a mold clamping cylinder (43) is provided on the left and right sides of the mold body (42); the mold clamping cylinder (43) is fixedly connected to the mold base (41); the output end of each mold clamping cylinder (43) is fixedly connected to a mold body (42); the mold clamping cylinder (43) drives the two mold bodies (42) to open and close in the horizontal direction; When the two mold bodies (42) are molded together, an accommodating cavity (44) is enclosed between the inner cavities of the two mold bodies. A clamp (45) is provided in the accommodating cavity (44). The clamp (45) is coaxial with the two-stage pressing head (3). The top of the clamp (45) holds a plunger assembly (100). The output end of the servo electric cylinder (2) moves downward to abut against the two-stage pressing head (3), so as to drive the two-stage pressing head (3) to move downward to abut against the plunger assembly (100) to press down and close the mouth.
2. A plunger assembly closing mold working mechanism according to claim 1, characterized in that: A lifting mechanism (5) is provided below the mold assembly (4), and the lifting mechanism (5) comprises a support frame (51) provided below the frame (1), a lifting cylinder (52) fixedly connected to the support frame (51), and a push rod (53) connected to the output end of the lifting cylinder (52), wherein the push rod (53) is provided above the lifting cylinder (52), the clamp (45) is fixed to the top of the push rod (53), and the upper part of the push rod (53) is passed through the interior of the mold base (41).
3. A plunger assembly closing mold working mechanism according to claim 2, characterized in that: A horizontal pressing plate (54) is fixedly connected between the output end of the lifting cylinder (52) and the push rod (53); a stop mechanism (7) is provided below the pressing plate (54); the stop mechanism (7) comprises a limit cylinder (71), a limit seat (72) and a limit pin (73); the limit cylinder (71) is fixed on the support frame (51); the output end of the limit cylinder (71) is connected to the limit seat (72); the limit pin (73) is vertically fixed above the limit seat (72); and an avoidance hole (541) for accommodating the limit pin (73) is provided on the pressing plate (54).
4. A plunger assembly closing mold working mechanism according to claim 2, characterized in that: The interiors of the push rod (53) and the clamp (45) are both hollow, and a vacuum valve nozzle (56) is provided on the lower side wall of the push rod (53).
5. A plunger assembly closing mold working mechanism according to claim 1, characterized in that: The two-stage pressing head (3) comprises a fixed sleeve (31) connected to the frame (1), a pressing rod (32) sleeved inside the fixed sleeve (31), a pressing block (33) fixed to the bottom end of the pressing rod (32), a movable sleeve (34) sleeved between the fixed sleeve (31) and the pressing rod (32), and a hoop (35) fixed to the bottom end of the movable sleeve (34); the hoop (35) is located below the fixed sleeve (31) and is used to be sleeved outside the two mold bodies (42) when the two mold bodies (42) are molded together; the top of the pressing rod (32) extends out of the fixed sleeve (31) and corresponds to the output end position of the servo electric cylinder (2); the servo electric cylinder (2) drives the pressing rod (32) to slide up and down inside the fixed sleeve (31), thereby driving the pressing block (33) to press down the plunger assembly (100).
6. A plunger assembly closing mold working mechanism according to claim 5, characterized in that: A first spring (36) is sleeved between the pressure rod (32) and the movable sleeve (34), and the upper and lower ends of the first spring (36) respectively abut against the pressure rod (32) and the movable sleeve (34); a second spring (37) is sleeved between the movable sleeve (34) and the fixed sleeve (31), and the upper and lower ends of the second spring (37) respectively abut against the movable sleeve (34) and the fixed sleeve (31), and the stiffness coefficient of the second spring (37) is smaller than the stiffness coefficient of the first spring (36), and the movable sleeve (34) can slide up and down inside the fixed sleeve (31).
7. A plunger assembly closing mold working mechanism according to claim 6, characterized in that: The inner wall and the outer wall of the movable sleeve (34) are respectively provided with a first notch (341) and a second notch (342), which are used to install a first spring (36) and a second spring (37), respectively; the upper ring of the pressure rod (32) is provided with a boss (321) extending outward, and the bottom surface of the boss (321) is in contact with the first spring (36).
8. A plunger assembly closing mold working mechanism according to claim 1, characterized in that: The inner cavity side of the mold body (42) is provided with a closing limit block (421) extending inwardly. The closing limit block (421) is located on the outer ring of the sliding shoe (102). During the closing process, the closing limit block (421) abuts against the outer side surface of the sliding shoe (102), so that the sliding shoe (102) is squeezed and deformed to cover the outside of the ball head of the plunger (101) to form a ball joint connection.
9. A plunger assembly closing mold working mechanism according to claim 1, characterized in that: The frame (1) comprises a top plate (11), an intermediate plate (12) and a bottom plate (13); the top plate (11), the intermediate plate (12) and the bottom plate (13) are connected and fixed by four pillars (14); the servo electric cylinder (2) is fixed on the top plate (11); the two-stage pressing head (3) is connected to the intermediate plate (12); and the mold assembly (4) is arranged on the bottom plate (13).
10. A plunger assembly closing mold working mechanism according to claim 9, characterized in that: A transverse movement mechanism (6) is provided below the intermediate plate (12), and the transverse movement mechanism (6) comprises a transverse movement cylinder (61) fixedly connected to the intermediate plate (12), two parallel guide rails (62), a slider (63) slidably mounted outside the guide rails (62), and a movable plate (64) fixedly connected to the two sliders (63). The two guide rails (62) are horizontally provided below the intermediate plate (12), and the two ends of the guide rails (62) are respectively fixedly connected to the intermediate plate (12). The piston rod (611) of the transverse movement cylinder (61) is parallel to the guide rail (62), and the front end of the piston rod (611) is fixedly connected to the movable plate (64), and the movable plate (64) is fixedly connected to the two-stage pressure head (3).