Oil cylinder and laminating equipment

Abstract

The invention belongs to the technical field of oil cylinders, and relates to an oil cylinder and laminating equipment. The oil cylinder comprises a cylinder barrel and a plunger, the cylinder barrel is provided with an oil cavity, the plunger extends into the oil cavity and can slide relative to the cylinder barrel in the preset direction, and the outer end of the plunger is exposed out of the cylinder barrel; a protruding face protruding towards the plunger is arranged at the cavity bottom of the oil cavity, and when the plunger slides to the deepest position relative to the cylinder barrel in the preset direction, the plunger can abut against the protruding face. The oil cylinder can be prevented from squatting to the bottom, and normal starting of the oil cylinder is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic cylinder technology, and in particular relates to a hydraulic cylinder and a laminating device. Background Technology

[0002] Lamination equipment is an important piece of equipment in the PCB (Printed Circuit Board) lamination process. The main function of lamination equipment is to provide the environment needed for rapid cooling of PCB lamination materials, so that the PCB lamination resin material can be cooled under a controllable temperature profile to improve production efficiency.

[0003] Existing PCB lamination equipment typically uses single-acting plunger cylinders. Due to the high frequency of use and harsh working environment of lamination equipment, the cylinders used in PCB lamination equipment must possess high reliability and maintainability. However, because the bottom of the cylinder cavity is a flat surface, the piston is prone to bottoming out when it reaches the bottom of the cavity, making it impossible to start normally. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hydraulic cylinder and a lamination device to address the technical problem that existing hydraulic cylinders are prone to bottoming out.

[0005] To solve the above-mentioned technical problems, on the one hand, the present invention provides a hydraulic cylinder, including a cylinder barrel and a plunger. The cylinder barrel is provided with an oil chamber, the plunger extends into the oil chamber and can slide relative to the cylinder barrel in a preset direction, and the outer end of the plunger protrudes from the cylinder barrel. The bottom of the oil chamber is provided with a protruding surface that protrudes towards the plunger. When the plunger slides to its deepest point relative to the cylinder along the preset direction, it can abut against the protruding surface.

[0006] According to an embodiment of the present invention, a protruding surface is provided at the bottom of the oil chamber. At this time, the bottom of the oil chamber has a structure with part protrusion and part concavity, so that when the plunger slides relative to the cylinder in a preset direction to the bottom of the chamber, the plunger abuts against the protruding surface, reducing the contact area between the plunger and the bottom of the chamber, avoiding bottoming out, and ensuring the normal start of the oil cylinder.

[0007] Optionally, the protruding surface includes a plane and an inclined surface arranged around the plane, and the plunger has a supporting end face on the side facing the protruding surface; When the plunger slides to its deepest point relative to the cylinder along the preset direction, the supporting end face can abut against the plane.

[0008] Optionally, the surface area of ​​the plane is smaller than the surface area of ​​the abutting end face.

[0009] Optionally, the cylinder further includes a cylinder head and a seal, wherein the cylinder head is fitted onto the plunger and installed in the cylinder barrel, and the seal is sealingly connected between the plunger, the cylinder head, and the cylinder barrel.

[0010] Optionally, the cylinder barrel is further provided with an installation groove, the oil chamber is connected to the bottom of the installation groove, and the cylinder head is sleeved on the plunger and threadedly connected to the groove wall of the installation groove; The seal is located between the bottom of the groove and the cylinder head along the preset direction.

[0011] Optionally, the sealing element has a groove on the side facing the bottom of the groove, and the groove communicates with the oil cavity; The cylinder is also provided with an exhaust port, which is connected to the groove. The exhaust port is used to discharge the gas in the oil chamber to the outside of the cylinder.

[0012] Optionally, the cylinder further includes a first guide member, which is mounted on the cylinder head, and the plunger slides in contact with the first guide member; The first guide member is used to provide sliding guidance for the plunger along the preset direction.

[0013] Optionally, the material of the first guide member is polytetrafluoroethylene or nylon.

[0014] Optionally, the cylinder further includes a dust seal, which is fitted onto the plunger and connected to the side of the cylinder head facing away from the cylinder barrel.

[0015] Optionally, the cross-section of the oil cavity perpendicular to the preset direction is circular; The oil cavity includes a first cavity segment, a second cavity segment, and a third cavity segment connected in sequence along the preset direction, and the bottom of the cavity is located on the side of the third cavity segment opposite to the second cavity segment; The cross-sectional diameter of the first cavity segment is smaller than that of the third cavity segment, and the cross-sectional diameter of the second cavity segment gradually decreases from the side closer to the third cavity segment to the side closer to the first cavity segment.

[0016] Optionally, the third cavity segment includes a first sub-cavity segment and a second sub-cavity segment, wherein the first sub-cavity segment is connected between the second cavity segment and the second sub-cavity segment; The cylinder includes a first cylinder body and a second cylinder body welded to the first cylinder body. The first cavity section, the second cavity section and the first sub-cavity section are disposed in the first cylinder body, and the second sub-cavity section and the cavity bottom are disposed in the second cylinder body.

[0017] Optionally, the cylinder further includes a second guide member, which is installed in the cylinder barrel and located in the oil chamber, and the plunger is in sliding contact with the second guide member; The second guide is used to provide sliding guidance for the plunger along the preset direction.

[0018] Optionally, the second guide is installed on the cylinder at a position corresponding to the first cavity segment.

[0019] Optionally, the material of the second guide is polytetrafluoroethylene or nylon.

[0020] Optionally, the cylinder is further provided with a liquid outlet, which is connected to the third chamber section; The outlet is used to inject oil into the oil chamber or to discharge oil from the oil chamber to the outside of the cylinder.

[0021] Optionally, the axial direction of the plunger and the extension direction of the oil cavity are parallel to each other with the preset direction.

[0022] On the other hand, embodiments of the present invention provide a lamination apparatus, which includes the aforementioned hydraulic cylinder.

[0023] According to the laminating equipment of the present invention, the oil cylinder has a protruding surface at the bottom of the oil chamber. At this time, the bottom of the oil chamber has a structure with a partially protruding surface and a partially recessed surface, so that when the plunger slides relative to the cylinder in a preset direction to the bottom of the chamber, the plunger abuts against the protruding surface, reducing the contact area between the plunger and the bottom of the chamber, avoiding bottoming out, and ensuring the normal start-up of the oil cylinder.

[0024] Optionally, the laminating equipment is either a PCB cold press or a PCB hot press. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a hydraulic cylinder provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the hydraulic cylinder from another angle; Figure 3 yes Figure 2 Cross-sectional view at point AA; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 yes Figure 1 A schematic diagram showing the disassembly of the seals after removing the cylinder head of the hydraulic cylinder.

[0026] The reference numerals in the accompanying drawings are as follows: 1. Cylinder; 10. Oil chamber; 101. First chamber section; 102. Second chamber section; 103. Third chamber section; 1031. First sub-chamber section; 1032. Second sub-chamber section; 11. Protruding surface; 111. Plane; 112. Inclined surface; 12. Mounting groove; 13. Exhaust port; 14. First cylinder block; 15. Second cylinder block; 16. Second guide member; 17. Fluid outlet; 2. Plunger; 21. Supporting end face; 3. Cylinder head; 31. First guide component; 32. Dust seal; 4. Sealing element; 41. Groove; 5. Material-receiving cone; 6. Exhaust connector; 7. Flow connector. Detailed Implementation

[0027] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] like Figures 1 to 6 As shown, the hydraulic cylinder provided in this embodiment of the invention includes a cylinder barrel 1 and a plunger 2. The cylinder barrel 1 is provided with an oil chamber 10. The plunger 2 extends into the oil chamber 10 and can slide relative to the cylinder barrel 1 in a preset direction. The outer end of the plunger 2 protrudes from the cylinder barrel 1.

[0029] The bottom of the oil chamber 10 is provided with a protruding surface 11 that protrudes toward the plunger 2. When the plunger 2 slides relative to the cylinder 1 in a preset direction, it can abut against the protruding surface 11.

[0030] The hydraulic cylinder provided in this embodiment of the invention has a protruding surface 11 at the bottom of the hydraulic cavity 10. At this time, the bottom of the hydraulic cavity 10 has a structure with part protrusion and part depression, so that when the plunger 2 slides relative to the cylinder 1 in a preset direction to the bottom of the cavity, the plunger 2 abuts against the protruding surface 11, reducing the contact area between the plunger 2 and the bottom of the cavity, avoiding bottoming out, and ensuring the normal start of the hydraulic cylinder.

[0031] In one embodiment, the axial direction of the plunger 2 and the extending direction of the oil chamber 10 are parallel to a predetermined direction to form a hydraulic cylinder structure. Figure 1 and Figure 3 Taking the direction shown as an example, the default direction is the up and down direction shown in the figure.

[0032] In one embodiment, such as Figure 3 and Figure 4 As shown, the protruding surface 11 includes a plane 111 and an inclined surface 112 arranged around the plane 111, and the plunger 2 is provided with a supporting end face 21 on the side facing the protruding surface 11.

[0033] When the plunger 2 slides to its deepest point relative to the cylinder 1 in a preset direction, the abutting end face 21 can abut against the plane 111.

[0034] By ensuring that the supporting end face 21 abuts against the plane 111, the contact area between the plunger 2 and the bottom of the cavity is reduced, preventing bottoming out and ensuring normal start-up of the hydraulic cylinder.

[0035] In one embodiment, such as Figure 3 and Figure 4 As shown, the surface area of ​​plane 111 is smaller than the surface area of ​​the abutting end face 21.

[0036] At this time, plane 111 is the contact surface between the plunger 2 and the protruding surface 11 when the plunger 2 moves to the bottom of the cavity. Part of the holding end face 21 of the plunger 2 abuts against plane 111 and part of it is suspended in the air to avoid bottoming out and to ensure the normal start of the oil cylinder.

[0037] In one embodiment, such as Figure 3 and Figure 4 As shown, the oil cavity 10 is provided with an opening, and the plunger 2 extends into the oil cavity 10 through the opening.

[0038] The bottom of the cavity and the opening are positioned opposite each other along a preset direction.

[0039] The protruding surface 11 is formed by protruding from the center of the cavity bottom toward the opening.

[0040] Therefore, the bottom of the oil cavity 10 forms a convex surface 11 structure with a central convex surface and a concave perimeter, which can avoid the problems of bottoming out and inability to start.

[0041] In one embodiment, such as Figures 3 to 6 As shown, the hydraulic cylinder also includes a cylinder head 3 and a seal 4. The cylinder head 3 is fitted onto the plunger 2 and installed on the cylinder barrel 1. The seal 4 is sealed between the plunger 2, the cylinder head 3 and the cylinder barrel 1.

[0042] By providing a seal 4, the plunger 2, cylinder head 3, and cylinder barrel 1 are sealed to prevent oil leakage from the oil chamber 10 through the cylinder head 3. Furthermore, since the seal 4 is sealed between the plunger 2, cylinder head 3, and cylinder barrel 1, only the cylinder head 3 needs to be removed for disassembly and maintenance of the seal 4.

[0043] Furthermore, such as Figure 6 As shown, after removing the cylinder head 3, the seal 4 can be removed using the pick-up cone 5. One end of the pick-up cone 5 forms a conical tip that can penetrate into the seal 4, and the other end forms a handle for easy pulling. After the conical tip penetrates into the seal 4, the seal 4 can be removed by pulling the pick-up cone 5.

[0044] In one embodiment, such as Figures 3 to 6 As shown, the cylinder barrel 1 is also provided with an installation groove 12, the oil chamber 10 is connected to the bottom of the installation groove 12, and the cylinder head 3 is sleeved on the plunger 2 and threadedly connected to the groove wall of the installation groove 12.

[0045] The seal 4 is located between the bottom of the groove and the cylinder head 3 in a preset direction.

[0046] The seal 4 is preferably a sealing ring. In this case, the seal 4 can be fitted onto the plunger 2 to better achieve the seal between the plunger 2, the cylinder head 3 and the cylinder barrel 1.

[0047] The cylinder head 3 and cylinder barrel 1 are fastened to the seal 4 by threaded fastening. When the seal 4 is to be replaced, the cylinder head 3 can be unscrewed to expose the seal 4, which makes the seal 4 easy to maintain and replace.

[0048] In one embodiment, such as Figures 3 to 6 As shown, the sealing element 4 has a groove 41 on the side facing the bottom of the groove, and the groove 41 is connected to the oil cavity 10.

[0049] The cylinder barrel 1 is also provided with an exhaust port 13, which is connected to the groove 41. The exhaust port 13 is used to discharge the gas in the oil chamber 10 to the outside of the cylinder barrel 1.

[0050] Preferably, the seal 4 can be an existing U-shaped sealing ring.

[0051] By setting the seal 4, oil leakage can be prevented during the upward movement of the plunger 2 (the process of moving away from the bottom of the cavity in a preset direction), thus providing a sealing function for the hydraulic cylinder. By setting the vent 13, a cylinder venting channel can be provided during the initial operation of the hydraulic cylinder and when changing the oil, so as to avoid vibration and shaking problems caused by air disturbance inside the cylinder.

[0052] In one embodiment, such as Figures 1 to 6 As shown, the hydraulic cylinder may also include an exhaust connector 6, which is installed on the cylinder barrel 1 and connected to the exhaust port 13 to allow gas to be discharged through the exhaust connector 6.

[0053] In one embodiment, such as Figures 3 to 6 As shown, the hydraulic cylinder also includes a first guide member 31, which is mounted on the cylinder head 3, and the plunger 2 slides in contact with the first guide member 31.

[0054] The first guide member 31 is used to provide sliding guidance for the plunger 2 in a preset direction, thereby reducing the operating friction coefficient of the plunger 2.

[0055] In one embodiment, the first guide member 31 is an annular structure, which can be sleeved on the plunger 2 to reduce the operating friction coefficient of the plunger 2 along the circumference of the plunger 2.

[0056] The material for the first guide component 31 can be polytetrafluoroethylene or nylon.

[0057] In one embodiment, such as Figure 3 and Figure 5 As shown, the hydraulic cylinder also includes a dustproof ring 32, which is fitted onto the plunger 2 and connected to the side of the cylinder head 3 facing away from the cylinder barrel 1.

[0058] By setting a dustproof ring 32, external dust and other foreign objects are prevented from entering the interior of the cylinder 1, thus preventing wear on the seal 4 and the cylinder 1.

[0059] In one embodiment, such as Figure 3 As shown, the cross-section of the oil cavity 10 perpendicular to the preset direction is circular.

[0060] The oil cavity 10 includes a first cavity segment 101, a second cavity segment 102 and a third cavity segment 103 connected in sequence along a preset direction, with the bottom of the cavity located on the side of the third cavity segment 103 facing away from the second cavity segment 102.

[0061] The cross-sectional diameter of the first cavity 101 is smaller than that of the third cavity 103, and the cross-sectional diameter of the second cavity 102 gradually decreases from the side closer to the third cavity 103 to the side closer to the first cavity 101.

[0062] The oil cavity 10 is roughly funnel-shaped to reduce the machining accuracy requirements of the cylinder barrel 1, thereby reducing manufacturing costs.

[0063] In one embodiment, such as Figure 3 As shown, the third cavity segment 103 includes a first sub-cavity segment 1031 and a second sub-cavity segment 1032. The first sub-cavity segment 1031 is connected between the second cavity segment 102 and the second sub-cavity segment 1032.

[0064] The cylinder 1 includes a first cylinder body 14 and a second cylinder body 15 connected to the first cylinder body 14. A first cavity section 101, a second cavity section 102 and a first sub-cavity section 1031 are disposed in the first cylinder body 14, and a second sub-cavity section 1032 and a cavity bottom are disposed in the second cylinder body 15.

[0065] The cylinder barrel 1 is processed in sections and then spliced ​​together, which can improve the standardization and batch production of the hydraulic cylinder, and reduce manufacturing costs and processing difficulty.

[0066] In one embodiment, the first cylinder 14 and the second cylinder 15 are made of steel, and in this case, the first cylinder 14 and the second cylinder 15 can be connected by welding.

[0067] In one embodiment, such as Figure 3 and Figure 5As shown, the hydraulic cylinder also includes a second guide member 16, which is installed in the cylinder barrel 1 and located in the oil chamber 10. The plunger 2 is in sliding contact with the second guide member 16.

[0068] The second guide member 16 is used to provide sliding guidance for the plunger 2 in a preset direction, thereby reducing the operating friction coefficient of the plunger 2.

[0069] In one embodiment, the second guide 16 is an annular structure, which can be sleeved on the plunger 2 to reduce the operating friction coefficient of the plunger 2 along the circumference of the plunger 2.

[0070] The material for the second guide component 16 can be polytetrafluoroethylene or nylon.

[0071] In one embodiment, the first guide 31 and the second guide 16 can be provided simultaneously. In this case, the number of cylinder seals 4 can be reduced, the cost of the cylinder and the cost of replacement in the later use can be reduced, and the operating friction coefficient of the cylinder plunger 2 can be reduced.

[0072] In one embodiment, such as Figure 3 As shown, since the first cavity section 101 has the smallest cross-sectional radius, a second guide member 16 can be installed on the cylinder 1 at the position corresponding to the first cavity section 101 to reduce the operating friction coefficient of the plunger 2.

[0073] In one embodiment, such as Figure 3 As shown, the cylinder 1 is also provided with a liquid outlet 17, which is connected to the oil chamber 10. Specifically, the liquid outlet 17 can be connected to the third chamber section 103.

[0074] The outlet 17 is used to inject oil into the oil chamber 10 or to discharge the oil in the oil chamber 10 to the outside of the cylinder 1.

[0075] By providing the flow port 17, an oil inlet and outlet channel is provided during the rising and falling processes of the plunger 2 (the process of moving towards the bottom of the cavity in a preset direction).

[0076] In one embodiment, such as 1 to Figure 6 As shown, the hydraulic cylinder may also include a fluid inlet 7, which is installed on the cylinder barrel 1 and communicates with the fluid outlet 17 to allow the oil to enter and exit through the fluid inlet 7.

[0077] The lamination equipment provided in this embodiment of the invention includes the hydraulic cylinder provided in the above embodiment.

[0078] The laminating equipment provided in this embodiment of the invention has a protruding surface 11 at the bottom of the oil cavity 10 of the cylinder. At this time, the bottom of the oil cavity 10 has a structure in which the protruding surface 11 is partially recessed, so that when the plunger 2 slides relative to the cylinder 1 in a preset direction to the bottom of the cavity, the plunger 2 abuts against the protruding surface 11, reducing the contact area between the plunger 2 and the bottom of the cavity, avoiding bottoming out, and ensuring the normal start-up of the oil cylinder.

[0079] In one embodiment, the lamination equipment is either a PCB cold press or a PCB hot press.

[0080] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydraulic cylinder, characterized in that, It includes a cylinder and a plunger. The cylinder is provided with an oil chamber. The plunger extends into the oil chamber and can slide relative to the cylinder in a preset direction. The outer end of the plunger protrudes from the cylinder. The bottom of the oil chamber is provided with a protruding surface that protrudes towards the plunger. When the plunger slides to its deepest point relative to the cylinder along the preset direction, it can abut against the protruding surface.

2. The hydraulic cylinder according to claim 1, characterized in that, The protruding surface includes a plane and an inclined surface arranged around the plane, and the plunger has a supporting end face on the side facing the protruding surface; When the plunger slides to its deepest point relative to the cylinder along the preset direction, the supporting end face can abut against the plane.

3. The hydraulic cylinder according to claim 2, characterized in that, The surface area of ​​the plane is smaller than the surface area of ​​the abutting end face.

4. The hydraulic cylinder according to claim 1, characterized in that, The hydraulic cylinder also includes a cylinder head and a seal. The cylinder head is fitted onto the plunger and installed in the cylinder barrel, and the seal is sealingly connected between the plunger, the cylinder head, and the cylinder barrel.

5. The hydraulic cylinder according to claim 4, characterized in that, The cylinder barrel is also provided with an installation groove, the oil chamber is connected to the bottom of the installation groove, and the cylinder head is sleeved on the plunger and threadedly connected to the groove wall of the installation groove. The seal is located between the bottom of the groove and the cylinder head along the preset direction.

6. The hydraulic cylinder according to claim 5, characterized in that, The sealing element has a groove on the side facing the bottom of the groove, and the groove communicates with the oil cavity; The cylinder is also provided with an exhaust port, which is connected to the groove. The exhaust port is used to discharge the gas in the oil chamber to the outside of the cylinder.

7. The hydraulic cylinder according to claim 4, characterized in that, The hydraulic cylinder further includes a first guide member, which is mounted on the cylinder head, and the plunger slides in contact with the first guide member; The first guide member is used to provide sliding guidance for the plunger along the preset direction.

8. The hydraulic cylinder according to claim 7, characterized in that, The first guide is made of polytetrafluoroethylene or nylon.

9. The hydraulic cylinder according to claim 4, characterized in that, The hydraulic cylinder also includes a dustproof ring, which is fitted onto the plunger and connected to the side of the cylinder head facing away from the cylinder barrel.

10. The hydraulic cylinder according to any one of claims 1-9, characterized in that, The cross-section of the oil cavity perpendicular to the preset direction is circular; The oil cavity includes a first cavity segment, a second cavity segment, and a third cavity segment connected in sequence along the preset direction, and the bottom of the cavity is located on the side of the third cavity segment opposite to the second cavity segment; The cross-sectional diameter of the first cavity segment is smaller than that of the third cavity segment, and the cross-sectional diameter of the second cavity segment gradually decreases from the side closer to the third cavity segment to the side closer to the first cavity segment.

11. The hydraulic cylinder according to claim 10, characterized in that, The third cavity segment includes a first sub-cavity segment and a second sub-cavity segment, wherein the first sub-cavity segment is connected between the second cavity segment and the second sub-cavity segment; The cylinder includes a first cylinder body and a second cylinder body welded to the first cylinder body. The first cavity section, the second cavity section and the first sub-cavity section are disposed in the first cylinder body, and the second sub-cavity section and the cavity bottom are disposed in the second cylinder body.

12. The hydraulic cylinder according to claim 10, characterized in that, The hydraulic cylinder further includes a second guide member, which is installed in the cylinder barrel and located in the oil chamber, and the plunger is in sliding contact with the second guide member; The second guide is used to provide sliding guidance for the plunger along the preset direction.

13. The hydraulic cylinder according to claim 12, characterized in that, The second guide is installed on the cylinder at the position corresponding to the first cavity section.

14. The hydraulic cylinder according to claim 12, characterized in that, The material of the second guide is polytetrafluoroethylene or nylon.

15. The hydraulic cylinder according to claim 10, characterized in that, The cylinder is also provided with a liquid outlet, which is connected to the third cavity section; The outlet is used to inject oil into the oil chamber or to discharge oil from the oil chamber to the outside of the cylinder.

16. The hydraulic cylinder according to claim 1, characterized in that, The axial direction of the plunger and the extension direction of the oil cavity are parallel to each other with the preset direction.

17. A lamination apparatus, characterized in that, Includes the hydraulic cylinder as described in any one of claims 1-16.

18. The laminating apparatus according to claim 17, characterized in that, The lamination equipment is either a PCB cold press or a PCB hot press.

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