Long guide rail slider type electric screw press

Abstract

The application discloses a long guide rail sliding block type electric screw press and relates to the field of screw presses, which comprises a rack, a flywheel is installed on the top of the rack, a motor is installed on the outer side of the flywheel, a gear on the output end of the motor is engaged with the flywheel, the flywheel is driven to rotate the main screw rod, the sliding block body which is threadedly connected with the main screw rod is moved up and down, a T-shaped groove is formed in the middle of the top end of the sliding block body, a nut which is threadedly connected with the main screw rod is fixedly installed in the T-shaped groove, and an extrusion groove is communicated with the lower end of the T-shaped groove. The three functions of buffering protection, automatic lubrication and cooling and heat dissipation are integrated in the sliding block body, no external additional device is needed, the structure is compact, the occupied space is small, the response speed is fast, and the safety, reliability and service life of the electric screw press are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of screw press technology, specifically a long guide rail slider type electric screw press. Background Technology

[0002] An electric screw press is a forging machine that uses screw transmission to convert the rotary motion of a flywheel into the linear reciprocating motion of a slide block. It features high versatility and high forging precision, and is suitable for various processes such as precision forging, finishing, and stamping. The screw pair formed by the main screw and nut is the core transmission component of the equipment, and its lubrication directly determines the efficiency and service life of the machine. However, existing electric screw presses have the following shortcomings in use: Firstly, regarding the lubrication of the screw pair, traditional lubrication methods mostly rely on external oil supply, making it difficult for the lubricating oil to fully enter the tooth contact surface of the screw pair, and lacking automatic oil replenishment and circulation functions. Chinese invention patent CN101811372B (Lubrication Protection and Recycling System for Electric Screw Press) discloses a solution in which a protective cover is fitted onto the main screw, with the upper and lower ends fixed to the sealing ring and the slider respectively. An oil passage is set between the oil inlet of the slider and the main nut to achieve the protection and recycling of the lubricating oil. Although this solution can prevent lubricating oil from splashing and achieve a certain degree of recycling, it still has the following defects: (1) The delivery of lubricating oil depends on external oil supply and does not achieve automatic oil replenishment linked with the working stroke of the equipment; (2) The protective cover is only a simple telescopic cover and does not have the functions of oil circulation drive and pressure regulation; (3) It lacks cooling and filtration treatment for the lubricating oil, and the purity of the oil decreases and the lubrication effect diminishes after long-term use.

[0003] Chinese invention patent CN117245962B (Permanent Magnet Direct Drive Electric Screw Press) proposes another lubrication scheme, in which the lubrication components are arranged inside the upper and lower nuts. The nut oil supply chamber is connected to an oil supply channel filled with screw roots. The screw roots have an undulating structure and oil outlets. The lubricant is drawn out from the nut oil outlets by the pumping effect generated when the screw rotates. Although this scheme achieves self-lubrication linked to the screw movement, its lubrication function is limited to oil supply inside the nut. It does not involve the integration of buffer protection and cooling functions, and the circulation driving force of the lubricating oil is weak, making it difficult to ensure sufficient oil supply under high load conditions.

[0004] Secondly, regarding safety protection in case of brake failure, the flywheel and screw system of an electric screw press store enormous kinetic energy. In the event of brake failure, the slide may descend uncontrollably, causing a severe impact on the top of the frame. Existing buffer devices are mostly independent, additional structures that occupy a large space and have limited response speed, lacking coordination with the lubrication system.

[0005] In summary, existing technologies (such as CN101811372B and CN117245962B) generally suffer from the following defects: (1) Lubrication, buffering, and cooling functions are implemented by independent subsystems, resulting in complex structures and large space requirements; (2) Lubrication systems often rely on external oil supply or a single pump suction effect, lacking an automatic oil replenishment and circulation drive mechanism linked to the equipment's working stroke; (3) The circulation, filtration, and cooling of lubricating oil are inadequate, leading to a decrease in lubrication effect after long-term use; (4) The buffer protection function is independent of the lubrication system, making it impossible to achieve rapid hydraulic damping buffering using the oil system in case of brake failure. These defects mean that the safety, reliability, and service life of electric screw presses still have considerable room for improvement. Summary of the Invention

[0006] The purpose of this invention is to provide a long guide rail slider type electric screw press in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a long guide rail slider type electric screw press, including a frame, a flywheel mounted on the top of the frame, a motor mounted on the outside of the flywheel, a gear at the output end of the motor meshing with the flywheel to drive the flywheel to rotate the main screw, so that the slider body threadedly mounted to the main screw moves up and down, a T-slot is provided in the middle of the top of the slider body, a nut threadedly connected to the main screw is fixedly installed in the T-slot, the lower end of the T-slot is connected to an extrusion groove, the inner diameter of the extrusion groove is smaller than the inner diameter of the T-slot, and a transition groove is provided between the T-slot and the extrusion groove, the lower end of the extrusion groove is connected to an oil tank; The top of the slider body is provided with at least two compression chambers, which are circumferentially distributed on the outside of the T-slot. The lower end of the compression chamber is provided with a compression chamber oil inlet. The slider body has an annular cooling chamber inside, which is sleeved on the outside of the T-slot and located directly below the compression chamber. The cooling chamber has at least two spiral tubes inside, with the upper end of the spiral tubes connected to the oil inlet of the compression chamber and the lower end of the spiral tubes connected to the oil outlet of the oil tank. The bottom of the main screw is equipped with an oil pressure assembly, and the upper opening of the compression chamber is equipped with a buffer assembly.

[0008] As a further embodiment of the present invention: the maximum outer diameter of the oil pressing assembly is matched with the inner diameter of the extrusion groove, and is used to push the oil accumulated in the extrusion groove and the oil tank to the spiral tube and the compression chamber when the main screw moves downward relative to the slider body; The upper opening of the compression chamber is equipped with a buffer assembly, which is used to absorb the impact of the slider body on the top of the frame by means of the oil pushed into the compression chamber by the oil pressure assembly in the event of flywheel brake failure, in conjunction with its own structure. An oil replenishment component is provided between the compression chamber and the buffer assembly. This component contacts the top of the frame during the return stroke of the slider body and works in conjunction with the oil pressure assembly to quantitatively replenish oil into the opening of the T-slot, so that the slider body flows into the gap between the main screw and the nut during the relative downward movement.

[0009] As a further embodiment of the present invention: the oil pressing assembly includes a connecting column fixedly connected to the bottom of the main screw, a pressure block is installed at the lower end of the connecting column, the upper end of the pressure block is a cylindrical piston, and the bottom of the pressure block has an arc-shaped structure. The transition groove is a funnel-shaped structure that is wider at the top and narrower at the bottom. The outer diameter of the upper end of the pressure block is matched with the inner diameter of the extrusion groove.

[0010] As a further embodiment of the present invention: the cooling chamber is filled with coolant, the upper outer wall of the cooling chamber is provided with a coolant inlet, and the lower outer wall of the cooling chamber is provided with a coolant outlet.

[0011] As a further embodiment of the present invention: the buffer assembly includes a sealing cover, a through hole for the buffer column to move through at the central axis of the sealing cover, a buffer piston is fixedly connected to the lower end of the buffer column, the buffer piston is located in the compression chamber, and a first pressure-bearing block is integrally formed on the top of the buffer column, the first pressure-bearing block is located above the sealing cover, and a buffer spring is sleeved on the outer wall of the sealing cover, the buffer spring is located between the top of the slider body and the first pressure-bearing block.

[0012] As a further embodiment of the present invention: the buffer column is a tubular component, and both the buffer piston and the first pressure-bearing block have through holes at their central axes that are compatible with the size of the inner diameter hole of the buffer column.

[0013] As a further aspect of the present invention: a plurality of micro-holes are provided at the circumferential outer edge of the buffer piston, and the outer diameter of the buffer piston is matched with the inner diameter of the compression chamber.

[0014] As a further embodiment of the present invention: the oil replenishing assembly includes an oil replenishing piston rod inserted into the buffer column, the upper end of the oil replenishing piston rod extending out of the first pressure-bearing block and integrally connected to a second pressure-bearing block, the second pressure-bearing block being located above the first pressure-bearing block, the lower end of the oil replenishing piston rod extending out of the bottom of the buffer piston and fixedly installed with an oil replenishing piston, the oil replenishing piston being located in the compression chamber and below the buffer piston, and a second spring being provided in the compression chamber, the second spring being located between the lower opening end of the compression chamber and the oil replenishing piston.

[0015] As a further embodiment of the present invention: the oil replenishment assembly further includes an oil delivery groove formed at the bottom of the oil replenishment piston rod, a through hole is formed on the upper outer wall of the oil delivery groove, and a conical groove is formed at the bottom of the oil replenishment piston. The conical groove is a funnel-shaped hole groove with a wider upper part and a narrower lower part, and the conical groove is connected to the oil delivery groove. A partition is provided at the lower middle end of the oil tank. The partition has multiple through holes. The partition is located below the through holes. A second ball is placed between the partition and the narrow opening of the conical groove. The curvature of the second ball matches the curvature of the inner cavity of the conical groove, and the second ball is located below the partition.

[0016] As a further embodiment of the present invention: the inner wall of the compression chamber is provided with a first oil passage hole, and the inner wall of the upper opening end of the T-slot is provided with a second oil passage hole. The first oil passage hole and the second oil passage hole are connected, and the inner diameter of the first oil passage hole is smaller than the inner diameter of the second oil passage hole. A first ball is provided between the first oil passage hole and the second oil passage hole, and the curvature of the connection between the first oil passage hole and the second oil passage hole matches the curvature of the first ball. A limiting ring is fixedly connected to the upper opening end of the T-slot. The limiting ring is a ring structure, and the outer diameter of the limiting ring is matched with the inner diameter of the upper opening of the T-slot. The limiting ring is located above the nut. A through hole with the same inner diameter as the first oil hole is opened on the outer wall of the limiting ring corresponding to the second oil hole. A first spring is also provided in the second oil hole. The first spring is located between the first ball and the limiting ring. The inner diameter of the first oil passage hole is smaller than the inner diameter of the second oil passage hole, and the inner diameter of the through hole on the limiting ring is smaller than the diameter of the first ball.

[0017] As a further aspect of the present invention: a filter element is provided inside the oil tank, the filter element being a cylindrical sponge block, and the outer diameter of the filter element being adapted to the inner diameter of the oil tank.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention integrates three major functions—buffer protection, automatic lubrication, and cooling—into the slider body, eliminating the need for external auxiliary devices. It features a compact structure, small footprint, and fast response speed, significantly improving the safety, reliability, and service life of the electric screw press.

[0019] 2. When the flywheel brake fails, the main screw continues to drive the slider body downwards. The hydraulic assembly on the main screw then presses the oil in the compression groove and oil tank downwards, pushing the oil through the spiral tube into the compression chamber. Once in the compression chamber, the oil pushes the buffer piston upwards. The buffer piston, through the buffer column, drives the first pressure block to compress the buffer spring. Simultaneously, the oil generates a damping effect through the micro-holes on the buffer piston, forming a multi-stage buffering and energy absorption mechanism. This effectively absorbs the impact of the slider body on the top of the frame, protecting the equipment and operators.

[0020] 3. During the return stroke of the slider body, the oil replenishing component contacts the top of the frame, pressing down the second pressure block and driving the oil replenishing piston rod and piston downwards, compressing the second spring. The oil in the compression chamber enters the buffer column cavity through the conical groove, oil channel, and through-hole at the bottom of the oil replenishing piston, and then is quantitatively replenished into the opening of the T-slot through the first and second oil passages. When the slider body descends again, the oil replenished to the opening of the T-slot flows into the gap between the main screw and the nut under the action of the oil pressure component, achieving automatic lubrication of the screw pair. The filter element filters the oil to ensure the cleanliness of the lubricating oil. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the slider body and main screw of the present invention; Figure 3 This is a schematic diagram of the internal structure of the slider body of the present invention; Figure 4 This is a schematic diagram of the installation structure of the spiral tube of the present invention; Figure 5 This is a schematic diagram of the installation structure of the hydraulic oil pressurization assembly of the present invention; Figure 6 For the present invention Figure 5 A magnified structural diagram of region A; Figure 7 This is a schematic diagram of the installation structure of the buffer assembly and the oil replenishment assembly of the present invention; Figure 8 This is a schematic diagram of the internal structure of the buffer component of the present invention; Figure 9 This is a schematic diagram of the internal structure of the oil replenishment component of the present invention.

[0022] In the diagram: 1. Frame; 2. Flywheel; 3. Motor; 4. Main screw; 5. Nut; 6. Slider body; 61. T-slot; 62. Extrusion groove; 63. Transition groove; 64. Oil tank; 65. Filter element; 66. Oil tank outlet; 67. Cooling chamber; 68. Compression chamber; 69. Compression chamber inlet; 610. Limiting ring; 611. First oil passage hole; 612. Second oil passage hole; 613. First ball; 614. First spring; 615. Coolant inlet; 616. Cooling 7. Liquid outlet; 8. Oil pressure assembly; 9. Connecting column; 10. Pressure block; 11. Buffer assembly; 12. Sealing cover; 13. Buffer column; 14. Buffer piston; 15. First pressure block; 16. Buffer spring; 17. Oil replenishment assembly; 18. Oil replenishment piston rod; 19. Oil replenishment piston; 20. Second pressure block; 10. Second spring; 11. Oil delivery groove; 12. Through hole; 13. Partition plate; 14. Second ball; 15. Conical groove; 16. Spiral tube. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-9 In this embodiment of the invention, the long guide rail slider type electric screw press includes a frame 1, a flywheel 2 mounted on the top of the frame 1, a motor 3 mounted on the outside of the flywheel 2, and a gear at the output end of the motor 3 meshing with the flywheel 2 to drive the flywheel 2 to rotate the main screw 4, so that the slider body 6 threadedly mounted to the main screw 4 moves up and down. A T-slot 61 is provided in the middle of the top of the slider body 6, and a nut 5 threadedly connected to the main screw 4 is fixedly installed in the T-slot 61. The lower end of the T-slot 61 is connected to a compression groove 62. The inner diameter of the compression groove 62 is smaller than the inner diameter of the T-slot 61, and a transition groove 63 is provided between the T-slot 61 and the compression groove 62. The lower end of the compression groove 62 is connected to an oil tank 64. The top of the slider body 6 also has at least two compression chambers 68, which are circumferentially distributed on the outside of the T-slot 61. The lower end of the compression chamber 68 is provided with a compression chamber oil inlet 69.

[0025] The slider body 6 has an annular cooling chamber 67 inside. The cooling chamber 67 is fitted on the outside of the T-slot 61 and is located directly below the compression chamber 68. At least two spiral tubes 10 are provided inside the cooling chamber 67. The upper end of the spiral tube 10 is connected to the oil inlet 69 of the compression chamber, and the lower end of the spiral tube 10 is connected to the oil outlet 66 of the oil tank 64.

[0026] The bottom of the main screw 4 is equipped with an oil pressing assembly 7. The maximum outer diameter of the oil pressing assembly 7 is matched with the inner diameter of the extrusion groove 62. When the main screw 4 moves downward relative to the slider body 6, the oil pressing assembly 7 pushes the oil accumulated in the extrusion groove 62 and the oil tank 64 to the spiral tube 10 and the compression chamber 68.

[0027] A buffer assembly 8 is installed at the upper opening end of the compression chamber 68. In the event of a brake failure of the flywheel 2, the oil pushed into the compression chamber 68 by the oil pressure assembly 7 works in conjunction with its own structure to absorb the impact of the slider body 6 on the top of the frame 1.

[0028] An oil replenishment component 9 is provided between the compression chamber 68 and the buffer component 8. It is used to contact the top of the frame 1 during the return stroke of the slider body 6 and cooperate with the oil pressure component 7 to quantitatively replenish oil into the opening of the T-slot 61, so that the slider body 6 flows into the gap between the main screw 4 and the nut 5 during the relative downward movement.

[0029] In this embodiment: when the flywheel 2 brake fails, the oil pressure assembly 7 quickly pushes the oil to the compression chamber 68. Through the synergistic action of the compression chamber 68 and the buffer assembly 8, a buffer energy absorption mechanism is formed, which effectively absorbs the violent impact of the slider body 6 on the top of the frame 1, avoiding equipment damage and personnel injury accidents, and significantly improving the operational safety of the electric screw press.

[0030] The oil replenishment component 9 automatically and quantitatively replenishes oil into the opening of the T-slot 61 during the return stroke of the slider body 6 by contacting the top of the frame 1. As the slider body 6 descends again, the oil flows into the threaded gap between the main screw 4 and the nut 5, thus lubricating the screw pair. This oil replenishment mechanism is linked to the working stroke of the slider body 6, requires no external control, and provides timely and quantitative lubrication, effectively reducing wear on the main screw 4 and the nut 5 and extending the service life of the screw pair.

[0031] A ring-shaped cooling chamber 67 is fitted outside the T-slot 61, and the coolant circulates through the coolant inlet 615 and the coolant outlet 616. The spiral tube 10 passes through the cooling chamber 67. As the lubricating oil flows within the spiral tube 10, it exchanges heat with the coolant, simultaneously reducing the oil temperature and cooling the slider body 6 and the spiral pair area. This effectively solves the heat generation problem during continuous operation, ensuring the thermal stability and machining accuracy of the equipment under long-term operation.

[0032] Please refer to this carefully. Figures 1-9 The oil pressure assembly 7 includes a connecting column 701 fixedly connected to the bottom of the main screw 4. A pressure block 702 is installed at the lower end of the connecting column 701. The upper end of the pressure block 702 is a cylindrical piston, and the bottom of the pressure block 702 is an arc-shaped structure. The transition groove 63 is a funnel-shaped structure that is wider at the top and narrower at the bottom. The outer diameter of the upper end of the pressure block 702 is matched with the inner diameter of the extrusion groove 62.

[0033] In this embodiment, the oil pressure assembly 7 moves synchronously with the main screw 4 during operation. The connecting column 701 serves as an intermediate connector, fixing the pressure block 702 to the bottom of the main screw 4. The outer diameter of the cylindrical piston at the upper end of the pressure block 702 matches the inner diameter of the extrusion groove 62, forming a sealed sliding fit. This ensures good sealing when the pressure block 702 moves up and down within the extrusion groove 62, preventing oil leakage from the gap between the pressure block 702 and the extrusion groove 62.

[0034] The arc-shaped structure at the bottom of the pressure block 702, in conjunction with the funnel-shaped structure of the transition groove 63 (wider at the top and narrower at the bottom), ensures smoother oil flow during the entry and exit of the pressure block 702 from the extrusion groove 62, reducing eddies and impacts and improving oil delivery efficiency. As the pressure block 702 descends into the transition groove 63 area, the contact area between the arc-shaped bottom and the funnel-shaped inner wall gradually increases, forming a smooth transition extrusion surface. This facilitates the smooth downward pushing of the oil to the oil tank 64, and then into the spiral tube 10 via the oil tank outlet 66.

[0035] The outer diameter of the upper cylindrical piston of the pressure block 702 is matched with the inner diameter of the extrusion groove 62, ensuring that the pressure block 702 can slide smoothly in the extrusion groove 62 while maintaining a good sealing effect. When the main screw 4 moves downward relative to the slider body 6, the pressure block 702 moves downward and enters the extrusion groove 62, applying pressure to the oil in the extrusion groove 62, pushing the oil out of the extrusion groove 62 and into the oil tank 64, and then pushing it to the spiral tube 10 and the compression chamber 68.

[0036] During the return stroke of the slider body 6, the main screw 4 moves upward relative to the slider body 6, and the pressure block 702 exits from the extrusion groove 62. At this time, the oil in the oil tank 64 is replenished through the spiral tube 10 under the action of the second spring 904 reset and the oil replenishment component 9, preparing for the next downward extrusion.

[0037] Please refer to this carefully. Figures 1-9 The cooling chamber 67 is filled with coolant. The upper outer wall of the cooling chamber 67 is provided with a coolant inlet 615, and the lower outer wall of the cooling chamber 67 is provided with a coolant outlet 616.

[0038] In this embodiment, both the coolant inlet 615 and the coolant outlet 616 are through holes formed on the outer wall of the slider body 6, respectively connected to the upper and lower ends of the cooling chamber 67. The coolant inlet 615 is used to inject coolant into the cooling chamber 67, and the coolant outlet 616 is used to discharge the coolant after heat exchange in the cooling chamber 67. The coolant inlet 615 and the coolant outlet 616 are respectively connected to an external coolant circulation system (such as a cooling water tank, radiator, circulation pump, etc.) through external pipes to form a complete coolant circulation loop. It should be noted that the coolant used in this solution is cooling water. When the lubricating oil flows through the spiral tube 10, it exchanges heat with the circulating coolant filling the cooling chamber 67, thereby cooling the lubricating oil and carrying away the heat generated by the slider body 6 and the spiral pair area.

[0039] Please refer to this carefully. Figures 1-9 The buffer assembly 8 includes a sealing cover 801. A through hole is provided at the central axis of the sealing cover 801 for the buffer column 802 to pass through. A buffer piston 803 is fixedly connected to the lower end of the buffer column 802. The buffer piston 803 is located in the compression chamber 68. A first pressure block 804 is integrally formed on the top of the buffer column 802. The first pressure block 804 is located above the sealing cover 801. A buffer spring 805 is sleeved on the outer wall of the sealing cover 801. The buffer spring 805 is located between the top of the slider body 6 and the first pressure block 804.

[0040] The buffer column 802 is a tubular component. Both the buffer piston 803 and the first pressure block 804 have through holes at their central axes that match the size of the inner diameter hole of the buffer column 802. Multiple micro holes are provided at the outer circumferential edge of the buffer piston 803. The outer diameter of the buffer piston 803 matches the inner diameter of the compression chamber 68.

[0041] In this embodiment: when the brake of flywheel 2 malfunctions or fails, motor 3 cannot stop in time, and flywheel 2 continues to drive the main screw 4 to rotate, causing the slider body 6 to continue to descend, posing a risk of violent impact on the top of frame 1. In this situation, the oil pressure assembly 7 continues to press downwards, rapidly pushing a large amount of lubricating oil through the spiral tube 10 into the compression chamber 68. The oil pressure in the compression chamber 68 rises sharply, pushing the buffer piston 803 to move rapidly upwards. The buffer piston 803, through the buffer column 802, drives the first pressure block 804 to rapidly compress the buffer spring 805, converting the impact kinetic energy of the slider body 6 into the elastic potential energy of the buffer spring 805. Simultaneously, the lubricating oil is forced to pass rapidly through the micro-holes on the buffer piston 803, generating a strong hydraulic damping effect, further absorbing and dissipating the impact energy. Through the dual action of the elastic buffering of the buffer spring 805 and the hydraulic damping of the micro-holes, the impact force of the slider body 6 on the top of frame 1 is effectively absorbed, achieving safety protection.

[0042] Please refer to this carefully. Figures 1-9 The oil replenishing assembly 9 includes an oil replenishing piston rod 901 inserted into the buffer column 802. The upper end of the oil replenishing piston rod 901 extends out to the first pressure block 804 and is integrally connected to the second pressure block 903. The second pressure block 903 is located above the first pressure block 804. The lower end of the oil replenishing piston rod 901 extends out to the bottom of the buffer piston 803 and is fixedly installed with an oil replenishing piston 902. The oil replenishing piston 902 is located in the compression chamber 68 and below the buffer piston 803. A second spring 904 is also provided in the compression chamber 68. The second spring 904 is located between the lower opening end of the compression chamber 68 and the oil replenishing piston 902.

[0043] The oil replenishment assembly 9 also includes an oil delivery groove 905 at the bottom of the oil replenishment piston rod 901. A through hole 906 is provided on the upper outer wall of the oil delivery groove 905. A conical groove 909 is provided at the bottom of the oil replenishment piston 902. The conical groove 909 is a funnel-shaped groove with a wider top and a narrower bottom. The conical groove 909 is connected to the oil delivery groove 905.

[0044] A baffle 907 is provided at the lower middle end of the oil tank 905. Multiple through holes are provided on the baffle 907. The baffle 907 is located below the through hole 906. A second ball 908 is placed between the baffle 907 and the narrow opening of the conical groove 909. The curvature of the second ball 908 matches the curvature of the inner cavity of the conical groove 909, and the second ball 908 is located below the baffle 907.

[0045] The inner wall of the compression chamber 68 is provided with a first oil passage hole 611, and the inner wall of the upper opening end of the T-slot 61 is provided with a second oil passage hole 612. The first oil passage hole 611 and the second oil passage hole 612 are connected, and the inner diameter of the first oil passage hole 611 is smaller than the inner diameter of the second oil passage hole 612. A first ball 613 is provided between the first oil passage hole 611 and the second oil passage hole 612, and the curvature of the connection between the first oil passage hole 611 and the second oil passage hole 612 matches the curvature of the first ball 613.

[0046] A limiting ring 610 is fixedly connected to the upper opening end of the T-slot 61. The limiting ring 610 has a ring structure, and the outer diameter of the limiting ring 610 matches the inner diameter of the upper opening of the T-slot 61. The limiting ring 610 is located above the nut 5. A through hole with the same inner diameter as the first oil hole 611 is opened on the outer wall of the limiting ring 610 corresponding to the second oil hole 612. A first spring 614 is also provided in the second oil hole 612. The first spring 614 is located between the first ball 613 and the limiting ring 610.

[0047] The inner diameter of the first oil passage 611 is smaller than the inner diameter of the second oil passage 612, and the inner diameter of the through hole on the limiting ring 610 is smaller than the diameter of the first ball 613.

[0048] In this embodiment: During the return stroke (upward movement) phase of the slider body 6, when the slider body 6 moves upward to near the top dead center, the second pressure block 903 of the oil replenishment assembly 9 contacts the top of the frame 1. As the slider body 6 continues to move upward, the second pressure block 903 is pressed down by the top of the frame 1, causing the oil replenishment piston rod 901 and the oil replenishment piston 902 to move downward, compressing the second spring 904. When the oil replenishment piston 902 moves downward, the oil pressure in the compression chamber 68 increases, and the oil enters from the conical groove 909 at the bottom of the oil replenishment piston 902, pushes open the second ball 908, enters the oil delivery groove 905 through the through hole on the partition 907, and then enters the inner cavity of the hollow buffer column 802 through the through hole 906. The oil in the inner cavity of the buffer column 802 continues to flow, pushing the first ball 613 to overcome the elastic force of the first spring 614 and open the channel between the first oil passage 611 and the second oil passage 612. Oil is metered and supplied to the upper opening of the T-slot 61, i.e., the area above the nut 5, through the first oil passage 611, the second oil passage 612, and the through hole on the limiting ring 610. When the slider body 6 moves downward again, the lubricating oil supplied to the upper opening of the T-slot 61 flows into the thread gap between the main screw 4 and the nut 5 under the pumping action generated by the relative rotational motion of the main screw 4 and the nut 5, thereby achieving automatic lubrication of the screw pair.

[0049] When the slider body 6 completes its return stroke and the second pressure block 903 disengages from the top of the frame 1, the second spring 904 pushes the oil replenishing piston 902 upward to reset, the first spring 614 pushes the first ball 613 to reset and close the oil circuit, and the second ball 908 falls back to block the lower narrow opening of the conical groove 909, completing a complete oil replenishment cycle.

[0050] Please refer to this carefully. Figures 1-9 The oil tank 64 is equipped with a filter element 65, which is a cylindrical sponge block. The outer diameter of the filter element 65 is matched with the inner diameter of the oil tank 64.

[0051] In this embodiment, the filter element 65 is made of porous elastic sponge material and has an overall cylindrical structure. Its outer diameter is matched with the inner diameter of the oil tank 64, allowing the filter element 65 to be installed precisely inside the oil tank 64, and the outer peripheral wall of the filter element 65 to form a close contact with the inner peripheral wall of the oil tank 64. This close contact ensures that all lubricating oil flowing through the oil tank 64 must pass through the internal pores of the filter element 65 and cannot bypass it through the gap between the filter element 65 and the inner wall of the oil tank 64, thereby achieving an effective filtration effect.

[0052] It should be noted that the top height of the filter element 65 in this design is less than the internal height of the oil tank 64, which allows the filter element 65 to have a certain axial movement space within the oil tank 64.

[0053] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A long guide rail slider type electric screw press, comprising a frame (1), a flywheel (2) mounted on the top of the frame (1), a motor (3) mounted on the outside of the flywheel (2), a gear at the output end of the motor (3) meshing with the flywheel (2) to drive the flywheel (2) to rotate the main screw (4), so that the slider body (6) threadedly mounted to the main screw (4) moves up and down, characterized in that, The top center of the slider body (6) is provided with a T-slot (61), and a nut (5) threadedly connected to the main screw (4) is fixedly installed in the T-slot (61). The lower end of the T-slot (61) is connected to a compression groove (62). The inner diameter of the compression groove (62) is smaller than the inner diameter of the T-slot (61), and a transition groove (63) is provided between the T-slot (61) and the compression groove (62). The lower end of the compression groove (62) is connected to an oil tank (64). The top of the slider body (6) is also provided with at least two compression chambers (68), which are circumferentially distributed on the outside of the T-slot (61). The lower end of the compression chamber (68) is provided with a compression chamber oil inlet (69). The slider body (6) has an annular cooling chamber (67) inside. The cooling chamber (67) is sleeved on the outside of the T-slot (61) and is located directly below the compression chamber (68). The cooling chamber (67) has at least two spiral tubes (10) inside. The upper end of the spiral tube (10) is connected to the oil inlet (69) of the compression chamber, and the lower end of the spiral tube (10) is connected to the oil outlet (66) of the oil tank (64) circumferentially opened. The bottom of the main screw (4) is equipped with an oil pressure assembly (7), and the upper opening end of the compression chamber (68) is equipped with a buffer assembly (8).

2. The long guide rail slider type electric screw press according to claim 1, characterized in that, The maximum outer diameter of the oil pressing assembly (7) is matched with the inner diameter of the extrusion groove (62), and is used to push the oil accumulated in the extrusion groove (62) and the oil tank (64) to the spiral tube (10) and the compression chamber (68) when the main screw (4) moves downward relative to the slider body (6). The buffer assembly (8) is used to absorb the impact of the slider body (6) on the top of the frame (1) by means of the oil pushed into the compression chamber (68) by the oil pressure assembly (7) in the event of brake failure of the flywheel (2). An oil replenishment component (9) is provided between the compression chamber (68) and the buffer component (8) for contacting the top of the frame (1) during the return phase of the slider body (6) and cooperating with the oil pressure component (7) to quantitatively replenish oil into the opening on the T-slot (61) so that the slider body (6) flows into the gap between the main screw (4) and the nut (5) during the relative downward process.

3. The long guide rail slider type electric screw press according to claim 2, characterized in that, The oil pressure assembly (7) includes a connecting column (701) fixedly connected to the bottom of the main screw (4). A pressure block (702) is installed at the lower end of the connecting column (701). The upper end of the pressure block (702) is a cylindrical piston, and the bottom of the pressure block (702) is an arc-shaped structure. The transition groove (63) is a funnel-shaped structure that is wider at the top and narrower at the bottom. The outer diameter of the upper end of the pressure block (702) is matched with the inner diameter of the extrusion groove (62).

4. The long guide rail slider type electric screw press according to claim 1, characterized in that, The cooling chamber (67) is filled with coolant, and the upper outer wall of the cooling chamber (67) is provided with a coolant inlet (615), and the lower outer wall of the cooling chamber (67) is provided with a coolant outlet (616).

5. The long guide rail slider type electric screw press according to claim 2, characterized in that, The buffer assembly (8) includes a sealing cover (801), with a through hole at the central axis of the sealing cover (801) for the buffer column (802) to pass through. The lower end of the buffer column (802) is fixedly connected to a buffer piston (803), which is located in the compression chamber (68). The top of the buffer column (802) is integrally formed with a first pressure block (804), which is located above the sealing cover (801). A buffer spring (805) is sleeved on the outer wall of the sealing cover (801), which is located between the top of the slider body (6) and the first pressure block (804).

6. The long guide rail slider type electric screw press according to claim 5, characterized in that, The buffer column (802) is a tubular component, and the buffer piston (803) and the first pressure block (804) are both provided with through holes at their central axes that are matched with the size of the inner diameter hole of the buffer column (802). The buffer piston (803) has multiple micro-holes at its circumferential outer edge, and the outer diameter of the buffer piston (803) is matched with the inner diameter of the compression chamber (68).

7. The long guide rail slider type electric screw press according to claim 5, characterized in that, The oil replenishing assembly (9) includes an oil replenishing piston rod (901) inserted into the buffer column (802). The upper end of the oil replenishing piston rod (901) extends out of the first pressure block (804) and is integrally connected to a second pressure block (903). The second pressure block (903) is located above the first pressure block (804). The lower end of the oil replenishing piston rod (901) extends out of the bottom of the buffer piston (803) and is fixedly installed with an oil replenishing piston (902). The oil replenishing piston (902) is located in the compression chamber (68) and below the buffer piston (803). A second spring (904) is also provided in the compression chamber (68). The second spring (904) is located between the lower opening end of the compression chamber (68) and the oil replenishing piston (902).

8. The long guide rail slider type electric screw press according to claim 7, characterized in that, The oil replenishment assembly (9) also includes an oil delivery groove (905) opened at the bottom of the oil replenishment piston rod (901). A through hole (906) is opened on the upper outer wall of the oil delivery groove (905). A conical groove (909) is opened at the bottom of the oil replenishment piston (902). The conical groove (909) is a funnel-shaped hole with a wider top and a narrower bottom. The conical groove (909) is connected to the oil delivery groove (905). A partition (907) is provided at the lower middle end of the oil tank (905). The partition (907) has multiple through holes. The partition (907) is located below the through hole (906). A second ball (908) is placed between the partition (907) and the narrow opening of the conical groove (909). The curvature of the second ball (908) matches the curvature of the inner cavity of the conical groove (909), and the second ball (908) is located below the partition (907).

9. The long guide rail slider type electric screw press according to claim 1, characterized in that, The inner wall of the compression chamber (68) is provided with a first oil passage hole (611), and the inner wall of the upper opening end of the T-slot (61) is provided with a second oil passage hole (612). The first oil passage hole (611) and the second oil passage hole (612) are connected, and the inner diameter of the first oil passage hole (611) is smaller than the inner diameter of the second oil passage hole (612). A first ball (613) is provided between the first oil passage hole (611) and the second oil passage hole (612), and the arc at the connection between the first oil passage hole (611) and the second oil passage hole (612) matches the arc of the first ball (613). A limiting ring (610) is fixedly connected to the upper opening end of the T-slot (61). The limiting ring (610) is a ring structure, and the outer diameter of the limiting ring (610) is matched with the inner diameter of the upper opening of the T-slot (61). The limiting ring (610) is located above the nut (5). The limiting ring (610) has a through hole with the same inner diameter as the first oil hole (611) on the outer wall of the second oil hole (612). A first spring (614) is also provided in the second oil hole (612). The first spring (614) is located between the first ball (613) and the limiting ring (610). The inner diameter of the first oil passage hole (611) is smaller than the inner diameter of the second oil passage hole (612), and the inner diameter of the through hole on the limiting ring (610) is smaller than the diameter of the first ball (613).

10. The long guide rail slider type electric screw press according to claim 1, characterized in that, The oil tank (64) is provided with a filter element (65), which is a cylindrical sponge block. The outer diameter of the filter element (65) is matched with the inner diameter of the oil tank (64).

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