Raw material screening device for edible oil processing
By designing the edible oil raw material screening device for the shaking screening assembly and cleaning assembly, the problem of raw material accumulation is solved, efficient screening and automatic cleaning are achieved, and screening efficiency is improved.
Patent Information
- Application Number
- CN202422238510.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing raw material screening device for edible oil processing does not have the function of shaking screening, which causes raw materials to easily accumulate on the surface of the screening net, affecting the screening efficiency.
A raw material screening device including a shaking screen assembly and a cleaning assembly is designed. The screening net is driven by a motor drive pulley and a rotating shaft to shake to avoid raw material accumulation and is equipped with a scraper cleaning structure to realize automatic cleaning of the screening net.
Effectively prevent raw materials from accumulating on the surface of the screening net, improve screening efficiency, and ensure the continuous and efficient operation of the screening net.
Smart Images

Figure CN223276690U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of edible oil processing, in particular to a raw material screening device for edible oil processing. Background Art
[0002] Edible oil, also known as "cooking oil," refers to animal or vegetable fats used in the food production process. It is liquid at room temperature. Due to reasons such as raw material sources, processing technology, and quality, most common edible oils are plant oils, including rapeseed oil, peanut oil, hemp oil, corn oil, olive oil, camellia oil, palm oil, sunflower oil, soybean oil, sesame oil, flaxseed oil (sesame oil), grapeseed oil, walnut oil, peony seed oil, etc. The raw materials for edible oil include peanuts, sesame, rapeseed, flaxseed, corn, soybeans, etc., and when using the raw materials for oil extraction, the raw materials need to be screened.
[0003] However, in the prior art, most raw material screening devices for edible oil processing do not have the advantage of shaking screening, which causes the raw materials to easily accumulate on the surface of the screening net when the screening equipment is screening the edible oil raw materials, thereby affecting the screening effect of the edible oil raw materials and reducing the screening efficiency of the screening device. Utility Model Content
[0004] The purpose of the utility model is to solve the problems existing in the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a raw material screening device for edible oil processing, comprising: a screening box, two supporting legs are fixedly installed on both side surfaces of the screening box, a control terminal is provided on one side surface of the screening box, guide plates are fixedly installed on both side inner wall surfaces of the screening box, a shaking screening assembly is provided on the other two side surfaces of the screening box, a cleaning assembly is provided on one side inner wall surface of the screening box, the shaking screening assembly includes four first through grooves, and the four first through grooves are symmetrically opened on both side surfaces of the screening box in a group of two, and cross bars are fixedly installed between the inner walls at both ends of the four first through grooves.
[0006] As a preferred embodiment, the surfaces of the four cross bars are movably covered with movable plates, the upper and lower side surfaces of the four movable plates correspond to the upper and lower inner wall surfaces of the four first through grooves, and the first springs are fixedly installed between the four movable plates and the inner wall surfaces of one side of the four first through grooves. The four cross bars are located on the inner sides of the four first springs, and the top surfaces of the four movable plates are fixedly installed with screening nets, and the bottom surfaces of the two guide plates are movably fitted with the screening nets, wherein one side surface of the two movable plates is fixedly installed with connecting plates, and a long frame is fixedly installed between the two connecting plates.
[0007] As a preferred embodiment, one side surface of the screening box is connected to a rotating shaft through a bearing, an L-shaped plate is fixedly installed on one side surface of the screening box, a rotating rod is rotatably connected between one side inner wall surface of the L-shaped plate and one side surface of the screening box, a motor is fixedly installed on one side surface of the L-shaped plate, the output end of the motor and one end of the rotating rod are fixedly connected, the surfaces of the rotating rod and the rotating shaft are fixedly provided with pulleys, and a transmission belt is connected between the two pulleys.
[0008] As a preferred embodiment, a short plate is fixedly mounted on the surface of the rotating shaft, one of the pulleys is located between the screening box and the short plate, a short rod is fixedly mounted on one side surface of the short plate, and the short rod moves inside the long frame.
[0009] As a preferred embodiment, the cleaning component includes a groove, which is provided on the inner wall surface of one side of the screening box, and a second through groove is provided on the other side surface of the screening box, and two circular rings are fixedly installed on the inner wall surface of one side of the second through groove, and a scraper is movably installed inside the groove, and two long rods are fixedly installed on one side surface of the scraper, and the ends of the two long rods away from the scraper respectively pass through the two circular rings, and the ends of the two long rods away from the scraper are fixedly installed with a warehouse door, and a handle is fixedly installed on one side surface of the warehouse door.
[0010] As a preferred embodiment, two mounting grooves are provided on one side surface of the screening box, and mounting plates are movably installed inside the two mounting grooves. The two mounting plates are fixedly installed on the upper and lower side surfaces of the warehouse door, and limiting grooves are provided on one side surface of the two mounting plates. Two cross slots are fixedly installed on one side surface of the screening box, and cross plates are slidably connected inside the two cross slots. A second spring is fixedly installed between the two cross plates and the inner wall surface of one side of the two cross slots.
[0011] As a preferred embodiment, a limiting plate is fixedly installed on one side surface of the two cross plates, and a limiting groove is provided on one side surface of the two mounting plates. The ends of the two limiting plates away from the two cross plates pass through the inner wall surface of one side of the two cross grooves and are correspondingly inserted into the inside of the two limiting grooves.
[0012] Compared with the prior art, the advantages and positive effects of the present invention are:
[0013] 1. In the present invention, when it is necessary to prevent edible oil raw materials from accumulating on the surface of the screening net, the edible oil raw materials are added to the surface of the screening net from above the screening box in advance, and then the motor is operated by the control terminal. The operation of the motor drives the rotating rod to rotate, and the rotation of the rotating rod drives one of the pulleys to rotate. A transmission belt is connected between the two pulleys, so that the two pulleys rotate synchronously, and the rotation of the other pulley drives the rotating shaft to rotate. The rotation of the rotating shaft drives the short plate to rotate, and the rotation of the short plate drives the short rod to rotate. The rotation of the short rod causes the long frame to reciprocate. The reciprocating motion of the long frame drives the two connecting plates to reciprocate. The reciprocating motion of the two connecting plates drives the two movable plates to reciprocate on the surfaces of the two cross bars. , so that the multiple movable plates make reciprocating motion on the surfaces of the multiple cross bars, and then make the screening net make reciprocating motion. At the same time, the movement of the multiple movable plates will also squeeze the multiple first springs, so that the multiple springs are compressed, and the screening net makes reciprocating motion to realize the shaking of the screening net. The shaking of the screening net makes the edible oil raw materials on the surface of the screening net shake, thereby preventing the edible oil raw materials from always accumulating on the surface of the screening net to block the screening of the raw materials. Through the cooperation of the above structure, the screening net can make reciprocating motion left and right, thereby making the screening net shake, and the shaking of the screening net drives the edible oil raw materials to shake, thereby preventing the edible oil raw materials from always accumulating on the surface of the screening net to block the screening of the raw materials, affecting the screening effect of the edible oil raw materials, and improving the screening efficiency of the device.
[0014] 2. According to the utility model, when it is necessary to clean the raw materials accumulated on the surface of the screening mesh, the two cross plates are pushed first. The movement of the two cross plates makes them move inside the two cross grooves. The movement of the two cross plates inside the two cross grooves squeezes the two second springs, thereby compressing the two second springs. At the same time, the movement of the two cross plates drives the two limit plates to move. When the two limit plates are completely located inside the two cross grooves, the two limit plates are disengaged from the two limit grooves, thereby causing the two mounting plates to lose their limit positions inside the two mounting grooves. At this time, the handle is pulled, and the movement of the handle drives the bin door to move. The movement of the bin door drives the two long rods to slide inside the two rings. The sliding of the two long rods inside the two rings drives the scraper to move. The scraper moves, thereby pushing the edible oil raw materials on the surface of the screening mesh from the second through groove to be discharged from the screening box. When the edible oil raw materials on the surface of the screening mesh are cleaned, the two mounting plates are reset, and the two mounting plates are reset to reset the bin door, and the scraper is movably installed inside the groove. Then the two cross plates are loosened, and the resilience of the two second springs is utilized to reinsert the two limiting plates inside the two limiting grooves, thereby limiting the two mounting plates inside the two mounting grooves, thereby completing the purpose of cleaning the surface of the screening mesh. Through the cooperation of the above structure, the scraper can exclude the raw materials on the surface of the screening mesh from the screening box, thereby avoiding the accumulation of the screened edible oil raw materials on the surface of the screening mesh, affecting the subsequent use of the screening mesh. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a raw material screening device for edible oil processing provided by the utility model;
[0016] Figure 2 This is a schematic structural diagram of a screening net of a raw material screening device for edible oil processing provided by the utility model;
[0017] Figure 3 The utility model provides a raw material screening device for edible oil processing Figure 1 Schematic diagram of the cross-sectional structure;
[0018] Figure 4 This is a right side structural schematic diagram of a raw material screening device for edible oil processing provided by the utility model;
[0019] Figure 5 The utility model provides a raw material screening device for edible oil processing Figure 4 Schematic diagram of the split structure;
[0020] Figure 6 This is a left-side structural schematic diagram of a raw material screening device for edible oil processing provided by the utility model;
[0021] Figure 7 The utility model provides a raw material screening device for edible oil processing Figure 6 Schematic diagram of the partially split structure;
[0022] Figure 8 This is a partial structural diagram of a cleaning assembly of a raw material screening device for edible oil processing provided by the utility model;
[0023] Figure 9 The utility model provides a raw material screening device for edible oil processing Figure 5 Schematic diagram of the structure of A;
[0024] Figure 10 The utility model provides a raw material screening device for edible oil processing Figure 6 Schematic diagram of the structure of B;
[0025] Figure 11 The utility model provides a raw material screening device for edible oil processing Figure 7 Schematic diagram of the structure of C.
[0026] Legend:
[0027] 1. Screening box; 2. Support legs; 3. Control terminal; 4. Guide plate; 5. Swinging screening assembly; 501. First through slot; 502. Cross bar; 503. Movable plate; 504. First spring; 505. Screening net; 506. Rotating shaft; 507. L-shaped plate; 508. Rotating rod; 509. Motor; 510. Pulley; 511. Drive belt; 512. Short plate; 513. Short rod; 514. Connecting plate; 515. Long frame; 6. Cleaning assembly; 601. Groove; 602. Second through slot; 603. Ring; 604. Scraper; 605. Long rod; 606. Bin door; 607. Handle; 608. Mounting slot; 609. Mounting plate; 610. Cross slot; 611. Cross plate; 612. Second spring; 613. Limit plate; 614. Limit slot. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0029] See also Figure 1-11 The utility model provides a technical solution: a raw material screening device for edible oil processing, comprising: a screening box 1, two supporting legs 2 are fixedly installed on both side surfaces of the screening box 1, a control terminal 3 is provided on one side surface of the screening box 1, guide plates 4 are fixedly installed on both side inner wall surfaces of the screening box 1, shaking screening components 5 are provided on the other two side surfaces of the screening box 1, and a cleaning component 6 is provided on one side inner wall surface of the screening box 1. The shaking screening component 5 includes four first through grooves 501, and the four first through grooves 501 are symmetrically opened on both side surfaces of the screening box 1 in a group of two. A cross bar 502 is fixedly installed between the inner walls at both ends of the four first through grooves 501.
[0030] Specifically: the control terminal 3 controls the operation of the motor 509. When the screening net 505 moves to the left and right extremes, the bottom surfaces of the two guide plates 4 always adhere to the surface of the screening net 505, preventing the edible oil raw materials from directly escaping from the screening net 505 when the screening net 505 shakes left and right.
[0031] In one embodiment, the surfaces of the four cross bars 502 are movably fitted with movable plates 503, and the upper and lower side surfaces of the four movable plates 503 correspond to the upper and lower inner wall surfaces of the four first through slots 501, and first springs 504 are fixedly installed between the four movable plates 503 and the inner wall surface of one side of the four first through slots 501. The four cross bars 502 are correspondingly located on the inner side of the four first springs 504, and a screening net 505 is fixedly installed on the top surface of the four movable plates 503. The bottom surfaces of the two guide plates 4 are movably fitted with the screening net 505, and one side surface of the two movable plates 503 is fixedly mounted with a connecting plate 514, and a long frame 515 is fixedly installed between the two connecting plates 514.
[0032] Specifically, the first spring 504 serves to limit the position of the movable plate 503 on the surface of the crossbar 502 and assist the movable plate 503 in performing reciprocating motion.
[0033] In one embodiment, one side surface of the screening box 1 is connected to a rotating shaft 506 through a bearing, an L-shaped plate 507 is fixedly installed on one side surface of the screening box 1, a rotating rod 508 is rotatably connected between one side inner wall surface of the L-shaped plate 507 and one side surface of the screening box 1, a motor 509 is fixedly installed on one side surface of the L-shaped plate 507, the output end of the motor 509 and one end of the rotating rod 508 are fixedly connected, and a pulley 510 is fixedly provided on the surface of the rotating rod 508 and the rotating shaft 506, and a transmission belt 511 is connected between the two pulleys 510.
[0034] Specifically, the motor 509 drives one of the two pulleys 510 to rotate, and the transmission belt 511 causes the two pulleys 510 to rotate synchronously, thereby causing the rotating rod 508 and the rotating shaft 506 to rotate synchronously.
[0035] In one embodiment, a short plate 512 is fixedly mounted on the surface of the rotating shaft 506 , one pulley 510 is located between the screening box 1 and the short plate 512 , and a short rod 513 is fixedly mounted on one side surface of the short plate 512 , and the short rod 513 moves inside the elongated frame 515 .
[0036] Specifically, the rotating shaft 506 drives the short plate 512 to rotate, and the short plate 512 drives the short rod 513 to rotate with the rotating shaft 506 as the center axis. The short rod 513 rotates with the rotating shaft 506 as the center axis to drive the mine construction to reciprocate.
[0037] In one embodiment, the cleaning component 6 includes a groove 601, which is provided on the inner wall surface of one side of the screening box 1, and a second through groove 602 is provided on the other side surface of the screening box 1. Two circular rings 603 are fixedly installed on the inner wall surface of one side of the second through groove 602, and a scraper 604 is movably installed inside the groove 601. Two long rods 605 are fixedly installed on the one side surface of the scraper 604, and the ends of the two long rods 605 away from the scraper 604 each pass through the two circular rings 603. A bin door 606 is fixedly installed on the end of the two long rods 605 away from the scraper 604, and a handle 607 is fixedly installed on the one side surface of the bin door 606.
[0038] Specifically, the groove 601 allows the scraper 604 to be movably installed inside it, and the two long rods 605 fit tightly into the inside of the two rings 603, so that the scraper 604 can move stably horizontally.
[0039] In one embodiment, two mounting grooves 608 are provided on one side surface of the screening box 1, and mounting plates 609 are movably installed inside the two mounting grooves 608. The two mounting plates 609 are fixedly installed on the upper and lower side surfaces of the warehouse door 606. A limiting groove 614 is provided on one side surface of the two mounting plates 609. Two cross slots 610 are fixedly installed on one side surface of the screening box 1, and cross plates 611 are slidably connected inside the two cross slots 610. A second spring 612 is fixedly installed between the two cross plates 611 and the inner wall surface of one side of the two cross slots 610.
[0040] Specifically, the second spring 612 serves to limit the position of the cross plate 611 inside the cross slot 610 .
[0041] In one embodiment, a limiting plate 613 is fixedly installed on one side surface of the two cross plates 611, and a limiting groove 614 is provided on one side surface of the two mounting plates 609. The ends of the two limiting plates 613 away from the two cross plates 611 pass through the inner wall surface of one side of the two cross grooves 610 and are correspondingly inserted into the inside of the two limiting grooves 614.
[0042] Specifically, the arrangement of the limiting plate 613 and the limiting groove 614 serves to limit the mounting plate 609 inside the mounting groove 608 , thereby limiting the compartment door 606 inside the second through groove 602 .
[0043] Working principle: When screening edible oil raw materials, when it is necessary to prevent the edible oil raw materials from accumulating on the surface of the screening mesh 505, the edible oil raw materials are added to the surface of the screening mesh 505 from above the screening box 1 in advance, and then the motor 509 is operated through the control terminal 3. The operation of the motor 509 drives the rotating rod 508 to rotate, and the rotation of the rotating rod 508 drives one of the pulleys 510 to rotate. A transmission belt 511 is connected between the two pulleys 510, so that the two pulleys 510 rotate synchronously, and the rotation of the other pulley 510 drives the rotating shaft 506 to rotate, and the rotation of the rotating shaft 506 drives the short plate 512 to rotate, and the rotation of the short plate 512 drives the short rod 513 to rotate, and the rotation of the short rod 513 causes the long frame 515 to reciprocate, and the reciprocating motion of the long frame 515 drives the two connecting plates 514 to reciprocate, and the reciprocating motion of the two connecting plates 514 drives two of the movable plates 5 03 The surfaces of two cross bars 502 make reciprocating motion, thereby making the multiple movable plates 503 make reciprocating motion on the surfaces of the multiple cross bars 502, and further making the screening net 505 make reciprocating motion. At the same time, the movement of the multiple movable plates 503 will also squeeze the multiple first springs 504, so that the multiple springs are compressed, and the screening net 505 makes reciprocating motion, thereby realizing the shaking of the screening net 505. The shaking of the screening net 505 makes the edible oil raw materials on the surface of the screening net 505 shake, thereby preventing the edible oil raw materials from always accumulating on the surface of the screening net 505 and blocking the screening of the raw materials. Through the cooperation of the above structure, the screening net 505 can make reciprocating motion left and right, thereby making the screening net 505 shake, and the shaking of the screening net 505 drives the edible oil raw materials to shake, thereby preventing the edible oil raw materials from always accumulating on the surface of the screening net 505 and blocking the screening of the raw materials, affecting the screening effect of the edible oil raw materials, and improving the screening efficiency of the device;When it is necessary to clean the materials accumulated on the surface of the screening net 505, first push the two cross plates 611. The two cross plates 611 move to move themselves inside the two cross grooves 610. The movement of the two cross plates 611 inside the two cross grooves 610 will squeeze the two second springs 612, so that the two second springs 612 are compressed. At the same time, the movement of the two cross plates 611 will drive the two limit plates 613 to move. When the two limit plates 613 are completely located inside the two cross grooves 610, the two limit plates 613 will be separated from the two limit grooves 614, and then the two mounting plates 609 will lose their limit in the two mounting grooves 608. At this time, pull the handle 607, the movement of the handle 607 drives the warehouse door 606 to move, and the movement of the warehouse door 606 drives the two long rods 605 to slide inside the two rings 603, and the two long rods 605 slide inside the two rings 603 to drive the scraper 6 04 moves, and the scraper 604 moves to push the edible oil raw materials on the surface of the screening mesh 505 from the second through groove 602 to be discharged from the screening box 1. When the edible oil raw materials on the surface of the screening mesh 505 are cleaned, the two mounting plates 609 are reset, and the two mounting plates 609 are reset to reset the bin door 606, and the scraper 604 is movably installed inside the groove 601. Then, the two cross plates 611 are loosened, and the two second springs 612 are used to make the two limiting plates 613 reinserted inside the two limiting grooves 614, thereby making the two mounting plates 609 limited inside the two mounting grooves 608, thereby completing the purpose of cleaning the surface of the screening mesh 505. Through the cooperation of the above structure, the scraper 604 can remove the raw materials on the surface of the screening mesh 505 from the screening box 1, preventing the sifted edible oil raw materials from accumulating on the surface of the screening mesh 505 and affecting the subsequent use of the screening mesh 505.
[0044] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A raw material screening device for edible oil processing, characterized in that: include: A screening box (1), wherein two supporting legs (2) are fixedly mounted on both side surfaces of the screening box (1), a control terminal (3) is provided on one side surface of the screening box (1), guide plates (4) are fixedly mounted on both side inner wall surfaces of the screening box (1), a shaking screening assembly (5) is provided on the other two side surfaces of the screening box (1), a cleaning assembly (6) is provided on one side inner wall surface of the screening box (1), the shaking screening assembly (5) comprises four first through slots (501), the four first through slots (501) are symmetrically arranged on both side surfaces of the screening box (1) in a group of two, and a cross bar (502) is fixedly mounted between the inner walls at both ends of the four first through slots (501).
2. The raw material screening device for edible oil processing according to claim 1, characterized in that: The surfaces of the four cross bars (502) are all movably sleeved with movable plates (503), the upper and lower side surfaces of the four movable plates (503) are movably fitted with the upper and lower inner wall surfaces of the four first through slots (501), a first spring (504) is fixedly installed between the four movable plates (503) and the inner wall surface of one side of the four first through slots (501), the four cross bars (502) are correspondingly located on the inner side of the four first springs (504), a screening net (505) is fixedly installed on the top surface of the four movable plates (503), and the bottom surfaces of the two guide plates (4) are movably fitted with the screening net (505), wherein a connecting plate (514) is fixedly installed on one side surface of the two movable plates (503), and a long frame (515) is fixedly installed between the two connecting plates (514).
3. The raw material screening device for edible oil processing according to claim 1, characterized in that: A rotating shaft (506) is connected to one side surface of the screening box (1) via a bearing, an L-shaped plate (507) is fixedly installed on one side surface of the screening box (1), a rotating rod (508) is rotatably connected between an inner wall surface of one side of the L-shaped plate (507) and a side surface of the screening box (1), a motor (509) is fixedly installed on one side surface of the L-shaped plate (507), an output end of the motor (509) and one end of the rotating rod (508) are fixedly connected, a pulley (510) is fixedly sleeved on the surface of the rotating rod (508) and the rotating shaft (506), and a transmission belt (511) is connected between the two pulleys (510).
4. The raw material screening device for edible oil processing according to claim 3, characterized in that: A short plate (512) is fixedly mounted on the surface of the rotating shaft (506), one of the pulleys (510) is located between the screening box (1) and the short plate (512), and a short rod (513) is fixedly mounted on one side surface of the short plate (512), and the short rod (513) moves inside the long frame (515).
5. The raw material screening device for edible oil processing according to claim 1, characterized in that: The cleaning assembly (6) includes a groove (601), the groove (601) is provided on the inner wall surface of one side of the screening box (1), and a second through groove (602) is provided on the other side surface of the screening box (1), two circular rings (603) are fixedly installed on the inner wall surface of one side of the second through groove (602), a scraper (604) is movably installed inside the groove (601), and two long rods (605) are fixedly installed on the surface of one side of the scraper (604), and the ends of the two long rods (605) away from the scraper (604) are correspondingly passed through the two circular rings (603), and the ends of the two long rods (605) away from the scraper (604) are fixedly installed with a warehouse door (606), and a handle (607) is fixedly installed on the surface of one side of the warehouse door (606).
6. The raw material screening device for edible oil processing according to claim 1, characterized in that: Two mounting grooves (608) are provided on one side surface of the screening box (1), and mounting plates (609) are movably installed inside the two mounting grooves (608). The two mounting plates (609) are fixedly installed on the upper and lower side surfaces of the warehouse door (606). Limiting grooves (614) are provided on one side surface of the two mounting plates (609). Two cross grooves (610) are fixedly installed on one side surface of the screening box (1), and cross plates (611) are slidably connected inside the two cross grooves (610). A second spring (612) is fixedly installed between the two cross plates (611) and the inner wall surface of one side of the two cross grooves (610).
7. The raw material screening device for edible oil processing according to claim 6, characterized in that: A limiting plate (613) is fixedly mounted on one side surface of the two cross plates (611), and one end of the two limiting plates (613) away from the two cross plates (611) passes through the inner wall surface of one side of the two cross slots (610) and is correspondingly inserted into the inside of the two limiting slots (614).