Toggle hydraulic press with upward filtering pressure head

Abstract

A toggle hydraulic press with an upward filtering pressing head is used for pressing sesame oil and comprises a top box, a stock bin frame, a toggle extrusion structure, a filtering disc, an oil suction pipeline, an extension spring and an oil suction cavity assembly, and the top box is fixedly arranged at the top of the stock bin frame; the stock bin frame is provided with an extrusion groove used for containing sesame residues. The two toggle extrusion structures are symmetrically arranged on the outer side of the top box. Each group of toggle extrusion structure comprises a bidirectional telescopic oil cylinder, two first toggles which are in bilateral symmetry, two second toggles which are in bilateral symmetry and two extrusion arms which are in bilateral symmetry; one end of the first toggle joint is hinged to the outer side of the top box, and the other end is hinged to one end of the second toggle joint; the other end of the second toggle joint is hinged to the top end of an extrusion arm, and the lower end of the extrusion arm is fixedly connected to a filter disc. A first pin shaft is arranged at the hinged position of the first toggle joint and the second toggle joint. The discharging direction of the extruded raw materials is separated from the precipitation direction of oil liquid, so that the high cleanliness of the pressed sesame oil in industrial sesame oil production is realized, the automatic control efficiency of oil pressing equipment in the food industry is improved, and excessive sesame residues in the sesame oil are avoided.

Description

Technical Field

[0001] The present invention relates to a press production device with a ram, and more particularly to a toggle hydraulic press with an upward filtering ram for pressing sesame oil. Background Art

[0002] Most of the small mill sesame oil is processed by the water displacement method, which has a history of more than 1,600 years. The traditional production process usually includes several steps such as material selection, cleaning, seed frying, grinding, stirring, oscillation, sedimentation, skimming, and packaging.

[0003] In the production process of existing industrial small mill sesame oil, after the sesame is broken and the oil layer is filtered out by the water displacement method, there will still be some sesame oil that cannot be extracted in the remaining sesame residue raw material. In order to improve the utilization rate of the raw material, the existing filtering and separation method is to place a heavy object above the sesame and filter out the sesame oil by gravity extrusion. However, when the filtration is completed, the sesame residue is in close contact with the container due to long-term extrusion, and it is necessary to manually remove the sesame residue, which not only has a large dependence on manual labor but also has a low production efficiency. In the prior art, there has also been a design that uses the cooperation of a knocking mechanism and a collection mechanism to facilitate the sliding of the filtered sesame residue from the filter plate for centralized collection, and an addition mechanism is used to facilitate the addition of sesame raw materials into the filter tank to avoid blockage, such as the invention patent application CN202410691902.8. Although this kind of filtering and extrusion mechanism has a certain effect, since it extrudes from top to bottom, the extruded sesame oil seeps from under the filter plate, and at the same time, due to the setting of the knocking mechanism, some sesame residues will also fall into the oil collection tank through the filter holes in the filter plate, and additional filtration links need to be added in the subsequent process, increasing the process.

[0004] In view of the above problems, the present application designs a toggle hydraulic press with an upward filtering ram to ensure that the extrusion and collection directions of the sesame oil are opposite to the removal direction of the sesame residue, ensure the cleanliness of the pressed sesame oil, avoid excessive sesame residues in the sesame oil, and at the same time improve the automation degree of the equipment in the industrial production of sesame oil. Summary of the Invention

[0005] The purpose of the present invention is to provide a toggle hydraulic press with an upward filtering ram to solve the technical problems in the prior art.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A toggle hydraulic press with an upward filtering ram, comprising a top box, a bin rack, a toggle extrusion structure, a filter plate, an oil suction pipeline, a tension spring, and an oil suction chamber assembly. The top box is fixedly arranged at the top of the bin rack; the bin rack has an extrusion groove for placing sesame residue; there are two groups of toggle extrusion structures, symmetrically arranged on the outer sides of the top box; each group of toggle extrusion structures includes a bidirectional telescopic oil cylinder, two first toggles symmetrically arranged left and right, two second toggles symmetrically arranged left and right, and two extrusion arms symmetrically arranged left and right; one end of the first toggle is hinged to the outer side of the top box, and the other end is hinged to one end of the second toggle; the other end of the second toggle is hinged to the top end of the extrusion arm, and the lower end of the extrusion arm is fixedly connected to the filter plate; a first pin shaft is arranged at the hinge joint of the first toggle and the second toggle; telescopic arms are telescopically installed at both ends of the bidirectional telescopic oil cylinder, a long strip waist-shaped hole is arranged at the end of the telescopic arm, and the first pin shaft is slidably installed in the long strip waist-shaped hole; a second pin shaft is also installed at the end of the telescopic arm, through holes are opened on the left and right side walls of the top box, and after the second pin shaft passes through the through hole and enters the interior of the top box, it is connected to the oil suction chamber assembly.

[0007] Preferably, the filter plate includes a vertical and closed side wall and a horizontal filter board. A containing space is formed inside the side wall and the filter board, and the outer dimension of the filter plate matches the inner dimension of the extrusion groove; a plurality of filter holes are opened on the filter board.

[0008] Preferably, the oil suction pipeline includes a first suction pipe, a second suction pipe, an oil suction hole, a first one-way valve, an oil discharge hole, and a second one-way valve; wherein, the bottom of the first suction pipe is fixedly installed at the center position of the filter board, a plurality of radially extending oil suction holes are arranged at the position of the bottom of the first suction pipe close to the filter board, and the oil suction holes connect the external space and the internal cavity of the first suction pipe; the top of the first suction pipe is slidably sleeved outside the second suction pipe, the top of the second suction pipe is fixedly installed at the middle position of the bottom of the top box, and the internal cavity of the second suction pipe is connected to the internal cavity of the top box.

[0009] Preferably, a first one-way valve is arranged between the second suction pipe and the internal cavity of the top box, and the first one-way valve ensures the one-way flow of oil from the second suction pipe to the top box; an oil discharge hole is opened at the center of the upper part of the top box, and the oil discharge hole connects the internal space of the top box and the external oil suction pump. A second one-way valve is arranged between the oil discharge hole and the oil suction pump to ensure the one-way flow of oil from the top box to the oil suction pump.

[0010] Preferably, the oil suction chamber assembly is arranged inside the top box and includes a piston chamber, two driving chambers, and two piston driving components; the piston chamber is located in the middle of the top box, the two driving chambers are symmetrically arranged on both sides of the piston chamber, the driving chamber and the piston chamber are separated by a partition board, the top of the piston chamber is connected to the oil discharge hole, and the bottom is connected to the second suction pipe.

[0011] Preferably, the piston driving assembly includes a piston head and a piston rod. Two piston heads are symmetrically and slidably arranged inside the piston chamber; one end of the piston rod is fixedly connected to the tail of the piston head, and the other end passes through the partition plate and enters the driving chamber.

[0012] Preferably, a driving slider is slidably installed in the driving chamber. One side of the driving slider is fixedly connected to the tail of the piston rod, and an inclined slide rail is arranged on the other side of the driving slider. The inclined slide rail is inclined, and the bottom of the inclined slide rail is inclined towards the central axis of the top box; an ear piece is slidably installed on the inclined slide rail. After the second pin shaft of the toggle pressing structure enters the top box through the through hole, it passes through the through hole on the ear piece.

[0013] Preferably, a tension spring is sleeved outside the first suction pipe and the second suction pipe. The top end of the tension spring is fixedly connected to the bottom of the top box, and the bottom end of the tension spring is fixedly connected to the upper side of the filter plate; when the tension spring shrinks to the minimum length, the filter disc is lifted to the highest position, so that the top of the side wall of the filter disc abuts against the lower side of the top box.

[0014] Preferably, when the telescopic arm of the double-acting telescopic oil cylinder is in the longest extended state, the first pin shaft is located at one end of the long strip-shaped waist-shaped hole closest to the cylinder body of the double-acting telescopic oil cylinder.

[0015] Preferably, the top of the second toggle has a protrusion, and a limiting post is arranged on the first toggle. When the double-acting telescopic oil cylinder drives the intersection hinge point to reach the center point of the toggle, the double-acting telescopic oil cylinder further contracts a small distance, so that after the intersection hinge point passes over the center point of the toggle, the protrusion is limited by the limiting post, restricting the further relative rotation of the first toggle and the second toggle.

[0016] The beneficial effects of the present invention are as follows: 1. Instead of setting a separate guiding structure for the pressing arm of the toggle pressing structure, a telescopic guiding oil suction structure composed of the first suction pipe and the second suction pipe is set. It not only realizes the guiding of the toggle mechanism, but also can synchronously suck the extruded oil upward, separates the discharging direction of the extruded raw material from the precipitation direction of the oil, realizes a high cleanliness of the squeezed sesame oil, avoids too many sesame residues in the sesame oil, and at the same time improves the automation degree of the equipment in the industrial production of sesame oil.

[0017] 2. The inclined slide rail set in the present invention ensures that the stretching and folding process of the toggle pressing structure and the suction process of the oil suction chamber assembly can move synchronously, avoiding the occurrence of mechanical dead point positions.

[0018] 3. The present invention utilizes the characteristic that the toggle point contracts inward during extrusion of the toggle pressing structure, combines the process of the toggle point contracting inward and stretching outward with the process of the piston sucking oil, separates the discharging direction of the raw material from the precipitation direction of the oil, and synchronously realizes the oil filtration and collection of sesame oil and the extrusion of raw materials.

[0019] 4. The present invention sets long strip waist-shaped holes on the telescopic arm to ensure the separation of the extrusion process and the oil absorption process, and ensure that the extruded oil has enough travel to be absorbed by the piston cavity.

[0020] 5. In order to ensure the effective extrusion of the raw materials by the filter disk after the toggle extrusion structure is fully extended, the present invention sets a protrusion at the top of the second toggle joint in combination with the characteristics of the tension spring, and sets a limit post on the first toggle joint, which not only realizes the long-time static extrusion of the raw materials by the toggle extrusion structure to ensure the full exudation of the oil, but also realizes the downward vibration of the slag on the filter holes of the filter disk to further prevent the blockage of the filter disk. Brief Description of the Drawings

[0021] Figure 1 is a schematic diagram of the extrusion and filtration structure of the present invention Figure 1 ; Figure 2 is a schematic diagram of the extrusion and filtration structure of the present invention Figure 2 ; Figure 3 is a schematic diagram of the extrusion and filtration structure of the present invention Figure 3 ; Figure 4 is a schematic diagram of the extrusion and filtration structure of the present invention Figure 4 ; Figure 5 is a schematic diagram of the internal structure of the top box of the present invention Figure 1 ; Figure 6 is a schematic diagram of the internal structure of the top box of the present invention Figure 2 ; Figure 7 is a schematic diagram of the internal structure of the top box of the present invention Figure 3 ; Figure 8 is a schematic diagram of the internal structure of the top box of the present invention Figure 4 ; Figure 9 is a schematic diagram of the toggle limit structure of the present invention; Reference numerals: top box 1, bin rack 2, toggle extrusion structure 3, filter disk 4, oil absorption pipeline 5, tension spring 6, oil absorption cavity assembly 7, through hole 11, partition 12, extrusion groove 21, double-acting telescopic oil cylinder 31, first toggle joint 32, second toggle joint 33, extrusion arm 34, telescopic arm 311, long strip waist-shaped hole 312, side wall 41, filter plate 42, filter hole 43, first suction pipe 51, second suction pipe 52, oil absorption hole 53, first one-way valve 54, oil discharge hole 55, second one-way valve 56, piston cavity 71, drive cavity 72, piston drive assembly 73, piston head 731, piston rod 732, drive slider 721, inclined slide rail 722, lug 723, protrusion 331, limit post 321. Detailed Embodiments

[0023] The following will describe in detail the specific embodiments of the present invention in conjunction with the accompanying drawings and preferred embodiments.

[0024] As Figures 1-9 shown is a schematic structural diagram of a toggle hydraulic press with an upward filtering ram of the present invention.

[0025] It includes a top box 1, a bin rack 2, a toggle extrusion structure 3, a filter disk 4, an oil suction pipeline 5, a tension spring 6, and an oil suction chamber assembly 7.

[0026] The top box 1 is a rectangular hollow box structure and is fixedly arranged at the top of the bin rack 2. The bin rack 2 has an extrusion groove 21 for preventing sesame residue. A door panel 22 that can be flipped open and closed is arranged on the side of the extrusion groove 21 for taking out and placing sesame residue into the extrusion groove 21. Universal wheels 23 are arranged at the bottom of the bin rack 2 to facilitate the movement of the bin rack 2.

[0027] There are two sets of toggle extrusion structures 3, which are symmetrically arranged outside the top box 1 (only one set is shown in the figure). Each set of toggle extrusion structures 3 includes a double-acting telescopic cylinder 31, two first toggles 32 symmetrically arranged on the left and right, two second toggles 33 symmetrically arranged on the left and right, and two extrusion arms 34 symmetrically arranged on the left and right. One end of the first toggle 32 is hinged to the outside of the top box 1, and the other end is hinged to one end of the second toggle 33. The other end of the second toggle 33 is hinged to the top end of the extrusion arm 34. The lower end of the extrusion arm 34 is fixedly connected to the filter disk 4. A first pin shaft 35 is arranged at the hinge joint of the first toggle 32 and the second toggle 33. Telescopic arms 311 are telescopically installed at both ends of the double-acting telescopic cylinder 31. A long strip waist-shaped hole 312 is arranged at the end of the telescopic arm 311. The first pin shaft 35 is slidably installed in the long strip waist-shaped hole 312. A second pin shaft 36 is also installed at the end of the telescopic arm 311. Through holes 11 are opened on the left and right side wall surfaces of the top box 1. The second pin shaft 36 passes through the through hole 11 and enters the inside of the top box 1 and then is connected to the oil suction chamber assembly 7.

[0028] The filter disk 4 includes a vertical and closed side wall 41 and a horizontal filter plate 42. A receiving space is formed inside the side wall 41 and the filter plate 42. The outer dimensions of the filter disk 4 match the inner dimensions of the extrusion groove 21. A number of filter holes 43 are opened on the filter plate 42.

[0029] The oil suction pipeline 5 includes a first suction pipe 51, a second suction pipe 52, an oil suction hole 53, a first one-way valve 54, an oil discharge hole 55, and a second one-way valve 56. Among them, the bottom of the first suction pipe 51 is fixedly installed at the center position of the filter plate 42. A plurality of radially extending oil suction holes 53 are provided at a position close to the filter plate 42 at the bottom of the first suction pipe 51. The oil suction holes 53 connect the external space and the internal cavity of the first suction pipe 51. The top of the first suction pipe 51 is slidably sleeved outside the second suction pipe 52. The top of the second suction pipe 52 is fixedly installed at the middle position of the bottom of the top box 1. The internal cavity of the second suction pipe 52 is connected to the internal cavity of the top box 1. The first suction pipe 51 and the second suction pipe 52 form a vertically guiding structure that can be telescopically slid. The filter disc 4 is vertically guided through the sliding guidance of the first suction pipe 51 and the second suction pipe 52, and at the same time, the pressing arm 34 in the toggle pressing structure 3 is vertically guided. A first one-way valve 54 is provided between the internal cavity of the second suction pipe 52 and the internal cavity of the top box 1. The first one-way valve 54 ensures the one-way flow of the oil fluid from the second suction pipe 52 to the top box 1. An oil discharge hole 55 is opened at the center of the upper part of the top box 1. The oil discharge hole 55 connects the internal space of the top box 1 and the external oil suction pump. A second one-way valve 56 is provided between the oil discharge hole 55 and the oil suction pump to ensure the one-way flow of the oil fluid from the top box 1 to the oil suction pump.

[0030] The oil suction chamber assembly 7 is arranged inside the top box 1 and includes a piston chamber 71, two driving chambers 72, and two piston driving components 73. The piston chamber 71 is located in the middle of the top box 1. The two driving chambers 72 are symmetrically arranged on both sides of the piston chamber 71. The driving chamber 72 and the piston chamber 71 are separated by a partition plate 12. The top of the piston chamber 71 is connected to the oil discharge hole 55, and the bottom is connected to the second suction pipe 52.

[0031] The piston driving component 73 includes a piston head 731 and a piston rod 732. The two piston heads 731 are symmetrically and slidably arranged inside the piston chamber 71. One end of the piston rod 732 is fixedly connected to the tail of the piston head 731, and the other end passes through the partition plate 12 and enters the driving chamber 72. A driving slider 721 is slidably installed in the driving chamber 72. One side of the driving slider 721 is fixedly connected to the tail of the piston rod 732, and an inclined slide rail 722 is provided on the other side of the driving slider 721. The inclined slide rail 722 is arranged in the vertical direction, but the bottom of the inclined slide rail 722 is inclined towards the central axis of the top box 1. An ear piece 723 is slidably installed on the inclined slide rail 722. The second pin shaft 36 of the toggle pressing structure 3 passes through the through hole on the ear piece 723 after entering the top box 1 from the through hole 11.

[0032] In addition, a tension spring 6 is sleeved outside the first suction pipe 51 and the second suction pipe 52. The top end of the tension spring 6 is fixedly connected to the bottom of the top box 1, and the bottom end of the tension spring 6 is fixedly connected to the upper side of the filter plate 42. When the tension spring 6 contracts to the minimum length, the filter disc 4 is lifted to the highest position, so that the top of the side wall 41 of the filter disc 4 abuts against the lower side of the top box 1. In addition, in order to ensure the suction of the oil liquid, the upper side of the filter plate 42 is in a shape of being recessed inward, and the connection part of the filter plate 42 and the first suction pipe 51 is the lowest point.

[0033] The following will Figures 1-9 describe the filtering and extrusion process of the present invention.

[0034] First, as shown in Figure 1 and Figure 5 , it is the state before extrusion. At this time, the sesame residue raw material to be extruded is loaded into the extrusion groove 21. At this time, due to the existence of the tension spring 6, the filter disc 4 is in the uppermost state. The top of the side wall 41 of the filter disc 4 abuts against the bottom of the top box 1 and is limited. The telescopic arm 311 of the double-acting telescopic oil cylinder 31 is in the longest extended state. The first pin shaft 35 is located at the end closest to the cylinder body in the long strip waist-shaped hole 312. The toggle extrusion structure 3 is in the largest folded state. The piston head 731 is located at both ends of the piston chamber 71.

[0035] The second step is Figure 2 and Figure 6 . At this time, the double-acting telescopic oil cylinder 31 contracts the telescopic arm 311. The long strip waist-shaped hole 312 slides relative to the first pin shaft 35. Finally, the end of the long strip waist-shaped hole 312 far from the cylinder body abuts against the first pin shaft 35. During this process, the telescopic arm 311 synchronously drives the second pin shaft 36 to move towards the middle, and synchronously drives the piston head 731 to compress the space of the piston chamber 71 inward, so that the air or oil liquid in the piston chamber 71 is discharged from the oil drain port 55.

[0036] The third step is Figure 3 and Figure 7 . At this time, the telescopic arm 311 of the double-acting telescopic oil cylinder 31 further contracts, driving the toggle extrusion structure 3 to change from the folded state to the extended state, driving the filter disc 4 to squeeze the sesame residue raw material in the extrusion groove 21 downward. The oil liquid in the raw material passes upward through the filter holes 43 into the space on the upper surface of the filter plate 42. At this time, the first suction pipe 51 and the second suction pipe 52 are stretched to the longest state, the tension spring 6 is stretched to the longest state, and the piston chamber 71 is also synchronously compressed to the minimum.

[0037] The fourth step is Figure 4 and Figure 8In this state, the telescopic arm 311 of the double-acting telescopic oil cylinder 31 extends, and the long strip waist-shaped hole 312 slides relative to the first pin shaft 35. Finally, one end of the long strip waist-shaped hole 312 close to the cylinder body abuts against the first pin shaft 35. During this process, the piston head 731 is synchronously driven to move to both sides, and the piston chamber 71 gradually becomes larger. Due to the settings of the first one-way valve 54 and the second one-way valve 56, the oil squeezed out from the upper surface of the filter plate 42 enters the piston chamber 71 through the oil suction hole 53, the first suction pipe 51, and the second suction pipe 52.

[0038] The fifth step is to return to Figure 1 、 Figure 5 In this state, during this process, the telescopic arm 31 of the double-acting telescopic oil cylinder 31 further extends, and the long strip waist-shaped hole 312 drives the toggle extrusion structure 3 to gradually fold from the extended state. During this process, the volume of the piston chamber 71 further increases, and more oil is absorbed.

[0039] In addition, in order to ensure the effective extrusion of the raw materials by the filter disc 4 after the toggle extrusion structure 3 is fully extended, a toggle limit structure as shown in Figure 9 is also provided. As shown in Figure 9 , the upper hinge point of the first toggle 32 is O1, the intersection hinge point of the first toggle 32 and the second toggle 33 is O3, and the lower hinge point of the second toggle 33 is O2. Due to the characteristics of the toggle mechanism, during the movement of the toggle, the upper hinge point O1 and the lower hinge point O2 are always on the same vertical axis. When the toggle mechanism is fully extended, the upper hinge point O1, the lower hinge point O2, and the intersection hinge point O3 are on the same vertical axis. Define the position of the intersection hinge point O3 on this axis at this time as the toggle center point O4. In order to ensure the effective extrusion of the raw materials by the filter disc 4 after the toggle extrusion structure 3 is fully extended, the present invention provides that the top of the second toggle 33 has a protrusion 331, and a limit post 321 is provided on the first toggle 32. After the double-acting telescopic oil cylinder 31 drives the intersection hinge point O3 to reach the toggle center point O4, the double-acting telescopic oil cylinder 31 further contracts a small distance, so that after the intersection hinge point O3 passes over the toggle center point O4, the protrusion 331 is limited by the limit post 321, restricting the further relative rotation of the first toggle 32 and the second toggle 33. And at this time, due to the existence of the tension spring 6, there is always a pulling force F that contracts inward on the toggle mechanism, thereby ensuring the long-term static extrusion of the raw materials by the toggle extrusion structure 3 and ensuring the full seepage of the oil. When the extrusion is completed, when the double-acting telescopic oil cylinder 31 drives the intersection hinge point O3 to cross the toggle center point O4 again, the tension spring 6 is first stretched and then suddenly contracts after passing over the toggle center point O4. The generated vibration is synchronously transmitted to the filter disc 4, ensuring that the slag entering the filter holes 43 on the filter disc 4 during the extrusion process is vibrated downward, further preventing the blockage of the filter disc 4.

[0040] In the present invention, instead of providing a separate guiding structure for the extrusion arm 34 of the toggle extrusion structure 3, a telescopic guiding oil suction structure composed of a first suction pipe 51 and a second suction pipe 52 is provided, which not only realizes the guiding of the toggle mechanism, but also simultaneously realizes the upward suction of the extruded oil, separates the discharging direction of the extruded raw material from the precipitation direction of the oil, realizes a high cleanliness of the squeezed sesame oil, and avoids excessive sesame residues in the sesame oil.

[0041] On the other hand, the inclined slide rail 722 provided in the present invention is arranged in an inclined direction to ensure that the expansion and folding process of the toggle extrusion structure 3 and the suction process of the oil suction cavity assembly 7 can move synchronously, avoiding the occurrence of mechanical dead points.

[0042] Moreover, the present invention utilizes the characteristic that the toggle joint point contracts inward during extrusion of the toggle extrusion structure 3, combines the process of the toggle joint point contracting inward and stretching outward with the process of the piston sucking oil, separates the discharging direction of the raw material from the precipitation direction of the oil, and simultaneously realizes the oil filtration and collection of the sesame oil and the extrusion of the raw material.

[0043] In addition, the provision of long strip waist-shaped holes 312 on the telescopic arm 311 ensures the separation of the extrusion process and the oil suction process, and ensures that the extruded oil has enough stroke to be absorbed by the piston cavity 71.

[0044] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 should not be construed as a limitation of the present invention.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0046] In the present invention, unless otherwise clearly specified or limited, terms such as "install", "connect", "couple", "fix", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A toggle hydraulic press with an upward filtering head for pressing sesame oil, characterized in that: It includes a top box, a silo frame, a toggle extrusion structure, a filter plate, an oil suction pipeline, a tension spring, and an oil suction chamber assembly. The top box is fixedly arranged on the top of the silo frame; the silo frame has an extrusion groove for placing sesame residue; the toggle extrusion structure has two groups, which are symmetrically arranged on the outside of the top box; each group of toggle extrusion structures includes a two-way telescopic oil cylinder, two left-right symmetrical first toggle joints, two left-right symmetrical second toggle joints, and two left-right symmetrical extrusion arms; one end of the first toggle joint is hinged to the outside of the top box, and the other end is hinged to one end of the second toggle joint; the other end of the second toggle joint is hinged to the top end of the extrusion arm, and the lower end of the extrusion arm is fixedly connected to the filter plate; a first pin shaft is arranged at the hinge of the first toggle joint and the second toggle joint; telescopic arms are telescopically installed at both ends of the two-way telescopic oil cylinder, and a long waist-shaped hole is arranged at the end of the telescopic arm, and the first pin shaft is slidably installed in the long waist-shaped hole; a second pin shaft is also installed at the end of the telescopic arm, and through holes are opened on the left and right side walls of the top box, and the second pin shaft passes through the through holes into the interior of the top box and is connected with the oil suction chamber assembly.

2. A toggle hydraulic press with an upward filtering head as claimed in claim 1, characterized in that: The filter disc comprises a vertical and closed side wall and a horizontal filter plate. A receiving space is formed inside the side wall and the filter plate. The outer dimensions of the filter disc match the inner dimensions of the extrusion groove. A plurality of filter holes are provided on the filter plate.

3. A toggle hydraulic press with an upward filtering head as claimed in claim 2, characterized in that: The oil suction pipeline includes a first suction pipe, a second suction pipe, an oil suction hole, a first one-way valve, an oil discharge hole, and a second one-way valve; wherein, the bottom of the first suction pipe is fixedly installed at the center position of the filter plate, and a plurality of radially extending oil suction holes are arranged at the bottom of the first suction pipe near the filter plate, and the oil suction holes connect the external space and the internal cavity of the first suction pipe; the top of the first suction pipe is slidably sleeved on the outside of the second suction pipe, and the top of the second suction pipe is fixedly installed at the middle position of the bottom of the top box, and the internal cavity of the second suction pipe is connected to the internal cavity of the top box.

4. A toggle hydraulic press with an upward filtering head as claimed in claim 3, characterized in that: A first one-way valve is arranged between the second suction pipe and the internal cavity of the top box, and the first one-way valve ensures the one-way flow of oil from the second suction pipe to the top box; an oil drain hole is opened in the center of the upper part of the top box, and the oil drain hole connects the internal space of the top box with the external oil suction pump. A second one-way valve is arranged between the oil drain hole and the oil suction pump to ensure the one-way flow of oil from the top box to the oil suction pump.

5. A toggle hydraulic press with an upward filtering head as claimed in claim 4, characterized in that: The oil suction chamber assembly is arranged inside the top box, and includes a piston chamber, two drive chambers and two piston drive assemblies; the piston chamber is located in the middle of the top box, and the two drive chambers are symmetrically arranged on both sides of the piston chamber. The drive chamber and the piston chamber are separated by a partition, the top of the piston chamber is connected to the oil drain hole, and the bottom is connected to the second suction pipe.

6. A toggle hydraulic press with an upward filtering head as claimed in claim 5, characterized in that: The piston drive assembly includes a piston head and a piston rod, and the two piston heads are symmetrically slidably arranged inside the piston cavity; One end of the piston rod is fixedly connected to the rear of the piston head, and the other end passes through the partition plate and enters the driving chamber.

7. A toggle hydraulic press with an upward filtering head as claimed in claim 6, characterized in that: A driving slider is slidably installed in the driving cavity, one side of the driving slider is fixedly connected to the tail of the piston rod, and the other side of the driving slider is provided with an inclined slide rail, which is inclined, and the bottom of the inclined slide rail is inclined toward the central axis of the top box; an ear piece is slidably installed on the inclined slide rail; the second pin shaft of the elbow extrusion structure enters the interior of the top box from the through hole and then passes through the through hole on the ear piece.

8. A toggle hydraulic press with an upward filtering head as claimed in claim 7, characterized in that: The first suction pipe and the second suction pipe are externally sleeved with a tension spring, the top end of the tension spring is fixedly connected to the bottom of the top box, and the bottom end of the tension spring is fixedly connected to the upper side of the filter plate; when the tension spring is contracted to the minimum length, the filter plate is lifted to the highest position, so that the top of the side wall of the filter plate abuts against the lower side of the top box.

9. A toggle hydraulic press with an upward filtering head as claimed in claim 8, characterized in that: When the telescopic arm of the two-way telescopic oil cylinder is in the longest extended state, the first pin shaft is located at one end of the cylinder body of the two-way telescopic oil cylinder in the long waist-shaped hole.

10. A toggle hydraulic press with an upward filtering head as claimed in claim 9, characterized in that: The second elbow joint has a protrusion on the top and a limiting column is arranged on the first elbow joint. When the two-way telescopic oil cylinder drives the intersection hinge point to reach the center point of the elbow joint, the two-way telescopic oil cylinder further contracts a short distance so that the intersection hinge point passes the center point of the elbow joint. Then, the protrusion is limited by the limiting column, thereby limiting the further relative rotation of the first elbow joint and the second elbow joint.

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