CN215784921U - Pig is multistage screening plant for feed production convenient to remove - Google Patents

Abstract

The utility model discloses a conveniently-movable multi-stage screening device for pig feed production, which comprises a box body, wherein when the device is used, a motor, a worm gear, a rotating rod, a rotary disc, a fixed shaft, a rectangular groove, a limiting plate, a limiting rod, a transverse rod and a vertical rod are matched with each other to drive the right sides of a first mesh screen and a second mesh screen to shake up and down so as to carry out primary and secondary screening on pig feed raw materials, and the pig feed raw materials are subjected to tertiary screening through the mutual matching of a cam, a push plate, a push rod, a spring, a frame body, a sleeve, a first T-shaped rod, a second T-shaped rod and a third mesh screen, so that the screening is more sufficient, the production quality of pig feed is improved, the bottom of a feed hopper is continuously knocked during screening through the mutual matching of the first connecting rod, an L-shaped plate, the second connecting rod, an arc-shaped rod and a round ball, and the feed hopper is prevented from being blocked, affecting the efficiency of the screening.

Description

Pig is multistage screening plant for feed production convenient to remove

Technical Field

The utility model relates to the technical field of pig feed production, in particular to a conveniently-movable multi-stage screening device for pig feed production.

Background

The pig feed is a feed for feeding domestic pigs, which is generally composed of protein feed, energy feed, coarse feed, green feed, silage, mineral feed and feed additives, and in the production and processing process of the pig feed, raw materials of the pig feed need to be screened, and a screening device is used in screening.

The screening plant is used in current pig feed production when the raw materials to pig feed sieves, is the single-stage screening usually only to make contain the granule raw materials not of uniform size in the pig feed raw materials, and still can have the fodder disintegrating slag to exist, influence the product quality, and at the in-process to pig feed raw materials screening, because continuous reinforced, lead to the feed inlet to block up easily, influence the efficiency of screening.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide the multi-stage screening device for pig feed production, which is convenient to move.

One of the purposes of the utility model is realized by adopting the following technical scheme:

a conveniently-movable multi-stage screening device for pig feed production comprises a box body, wherein a feeding funnel is inserted in the middle position of the top of the box body, a vibration mechanism is arranged at the position, close to the bottom, of the right side of the feeding funnel, a bearing plate is fixedly connected to the bottom of the box body, universal wheels are fixedly connected to the positions, close to the four corners, of the bottom of the bearing plate, a first mesh screen is hinged to the position, close to the top, of the left side of an inner cavity of the box body, a first opening is formed in the position, close to the top, of the right side of the box body, the right side of the first mesh screen is inserted in the inner cavity of the first opening, a second mesh screen is arranged at the bottom of the first mesh screen, the left side of the second mesh screen is hinged to the left side of the inner cavity of the box body, a second opening is formed in the position, close to the middle position, the right side of the second mesh screen is inserted in the inner cavity of the second opening, and a frame body is arranged at the bottom of the second mesh screen, and the inner chamber of the frame body is provided with a third mesh screen close to the bottom, the bottom of the frame body is provided with a slag collecting tank, and the left side of the box body is provided with a shaking mechanism.

Further, the top of framework is close to left and right sides department and all is equipped with the baffle, two one side that the baffle kept away from mutually all with box fixed connection, and two the contained angle up between the baffle is the obtuse angle, the left and right sides of framework all is equipped with the sleeve pipe, two one side that the sleeve pipe kept away from mutually all with box inner chamber lateral wall fixed connection, be located left the sleeve pipe inner chamber is pegged graft and is had first T shape pole, just the longer one end of first T shape pole T shape structure and the left side fixed connection of framework are located the right side the sleeve pipe inner chamber is pegged graft and is had second T shape pole, just the longer one end of second T shape pole T shape structure and the right side fixed connection of framework.

Further, the right side fixedly connected with rectangle frame of box, the rectangle frame inner chamber is equipped with two feed collecting groove, and two feed collecting groove sets up from top to bottom, two the equal fixedly connected with handle in feed collecting groove's right side is located the bottom the feed collecting groove is laminated with the inner chamber bottom of rectangle frame each other, the fixedly connected with baffle of inner chamber intermediate position department of rectangle frame is located the top the bottom and the baffle top of feed collecting groove are laminated each other, and two the feed collecting groove is located first opening and second open-ended bottom respectively.

Furthermore, the front side of box is opened and is equipped with the third opening, the front side of box is equipped with the door that matches each other with the third opening, the door left side is equipped with two hinges, the door is through two hinges and box swing joint, the door front side is close to right side department fixedly connected with handle.

Further, vibrations mechanism includes the ball, just the inner chamber that the ball is located the box is close to top department, the right side fixedly connected with arc pole of ball, just the one end that the ball was kept away from to the arc pole is articulated with box inner chamber top, the top of first mesh screen is close to that right side department articulates there is the head rod, the box right side is close to top department and is equipped with the L shaped plate, the right side fixedly connected with slider of L shaped plate, the right side of box is close to top department and has seted up the spout, just slider swing joint is at the spout inner chamber, the one end that first mesh screen was kept away from to the head rod is articulated with the L shaped plate, the top of L shaped plate articulates there is the second connecting rod, just the one end that the L shaped plate was kept away from to the second connecting rod is articulated with the arc pole.

Further, the shaking mechanism comprises a motor, the motor is fixedly connected to the top of the bearing plate close to the left side, a worm is fixedly connected to the power output end of the motor, a transverse plate is fixedly connected to the left side of the box body close to the top, a first bearing is fixedly connected to the transverse plate, the bottom end of the worm penetrates through the inner cavity of the first bearing and is meshed with a worm wheel, a rotating rod is arranged in the inner cavity of the worm wheel in a penetrating manner, a side plate is fixedly connected to the left side of the transverse plate, a second bearing is fixedly connected to the right side of the side plate close to the top, the left end of the rotating rod is inserted into the inner cavity of the second bearing, a rotating disc is fixedly connected to the right end of the rotating rod, a fixed shaft is fixedly connected to the right side of the rotating disc close to the bottom, a rectangular groove is sleeved on the outer side of the fixed shaft, a transverse rod is fixedly connected to the right side of the rectangular groove, a groove is formed in the left side of the box body close to the top, the right-hand member of horizontal pole runs through the fluting inner chamber to fixedly connected with montant, just the upper and lower both ends of montant are articulated with first mesh screen and second mesh screen respectively, the equal fixedly connected with limiting plate in both sides around the rectangular channel, just first perforation has been seted up on the limiting plate, two first perforation inner chamber all runs through and is equipped with the gag lever post, just the bottom and the diaphragm fixed connection of gag lever post.

Further, the outside of worm is close to bottom department cover and is equipped with the cam, just the right side of cam is equipped with the push pedal, the right side fixedly connected with push rod of push pedal, the left side of box is close to bottom department and has seted up the second and perforate, just the right-hand member of push rod runs through the second and perforates the inner chamber to with framework fixed connection, the outside cover of push rod is equipped with the spring, just both ends respectively with push pedal and box fixed connection about the spring.

Compared with the prior art, the utility model has the beneficial effects that:

1. the pig feed raw materials are subjected to primary and secondary screening by driving the right sides of a first mesh screen and a second mesh screen to shake up and down through the mutual matching of a motor, a worm wheel, a rotating rod, a rotary disc, a fixed shaft, a rectangular groove, a limiting plate, a limiting rod, a transverse rod and a vertical rod, and are subjected to tertiary screening through the mutual matching of a cam, a push plate, a push rod, a spring, a frame body, a sleeve, a first T-shaped rod, a second T-shaped rod and a third mesh screen, so that screening is more sufficient, and the production quality of the pig feed is improved;

2. through mutually supporting between first connecting rod, L shaped plate, second connecting rod, arc pole and the ball make continuous the feeding funnel bottom of strikeing in the screening, avoid feeding funnel to block up, influence the efficiency of screening.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of the present embodiment;

FIG. 2 is a schematic structural diagram of the present embodiment;

fig. 3 is a right side view of the rectangular frame of the component.

In the figure: 1. a box body; 2. a feed hopper; 3. a bearing plate; 4. a universal wheel; 5. a motor; 6. a cam; 7. pushing the plate; 8. a spring; 9. a worm; 10. a rotating rod; 11. a worm gear; 12. a turntable; 13. a rectangular groove; 14. a rectangular frame; 15. a push rod; 16. a crushed slag collecting tank; 17. a frame body; 18. a third mesh screen; 19. a feed collecting tank; 20. a first connecting rod; 21. an L-shaped plate; 22. a second connecting rod; 23. an arcuate bar; 24. a ball; 25. a vertical rod; 26. a cross bar; 27. a first mesh screen; 28. a second mesh screen.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, a conveniently movable multi-stage screening device for pig feed production comprises a box body 1, a third opening is arranged on the front side of the box body 1, a door matched with the third opening is arranged on the front side of the box body 1, two hinges are arranged on the left side of the door, the door is movably connected with the box body 1 through the two hinges, a handle is fixedly connected to the front side of the door close to the right side, the operation is convenient, a feeding funnel 2 is inserted in the middle position of the top of the box body 1, a vibrating mechanism is arranged on the right side of the feeding funnel 2 close to the bottom, a bearing plate 3 is fixedly connected to the bottom of the box body 1, universal wheels 4 are fixedly connected to the bottom of the bearing plate 3 close to the four corners, a first screen 27 is hinged to the left side of the inner cavity of the box body 1 close to the top, a first opening is arranged on the right side of the box body 1 close to the top, the right side of the first screen 27 is inserted in the inner cavity of the first opening, a second screen 28 is arranged on the bottom of the first screen 27, the left side of the second mesh screen 28 is hinged with the left side of the inner cavity of the box body 1, a second opening is arranged at the position, close to the middle position, of the right side of the box body 1, the right side of the second mesh screen 28 is inserted in the inner cavity of the second opening, the bottom of the second mesh screen 28 is provided with a frame body 17, a third mesh screen 18 is arranged at the position, close to the bottom, of the inner cavity of the frame body 17, partition plates are arranged at the positions, close to the left side and the right side, of the top of the frame body 17, the sides, far away from the two partition plates are fixedly connected with the box body 1, an upward included angle between the two partition plates is an obtuse angle, sleeves are arranged at the left side and the right side of the frame body 17, the sides, far away from the two sleeves are fixedly connected with the side wall of the inner cavity of the box body 1, a first T-shaped rod is inserted in the inner cavity of the sleeve at the left side, the longer end of the T-shaped structure of the first T-shaped rod is fixedly connected with the left side of the frame body 17, a second T-shaped rod is inserted in the inner cavity of the right side of the frame body 17, the convenient raw materials after sieving the second grade collect in the inner chamber of framework 17, avoid spilling hourglass, the bottom of framework 17 is equipped with disintegrating slag collecting vat 16, the left side of box 1 is equipped with shake mechanism, the right side fixedly connected with rectangle frame 14 of box 1, rectangle frame 14 inner chamber is equipped with two fodder collecting vats 19, and two fodder collecting vats 19 are setting up from top to bottom, the equal fixedly connected with handle in right side of two fodder collecting vats 19, the fodder collecting vat 19 that is located the bottom is laminated each other with rectangle frame 14's inner chamber bottom, the fixedly connected with baffle of rectangle frame 14's inner chamber intermediate position department, the bottom that is located the fodder collecting vat 19 at top is laminated each other with the baffle top, and two fodder collecting vats 19 are located first opening and second open-ended bottom respectively, the convenience is to the one-level, pig feed ingredient after sieving the second grade is collected.

Vibrations mechanism includes ball 24, and ball 24 is located the inner chamber of box 1 and is close to top department, ball 24's right side fixedly connected with arc pole 23, and arc pole 23 keeps away from ball 24's one end and box 1 inner chamber top articulated, first mesh screen 27's top is close to that right side department articulates there is head rod 20, box 1 right side is close to top department and is equipped with L shaped plate 21, L shaped plate 21's right side fixedly connected with slider, box 1's right side is close to top department and has seted up the spout, and slider swing joint is at the spout inner chamber, first mesh screen 27's is kept away from to head rod 20 one end is articulated with L shaped plate 21, L shaped plate 21's top articulates there is second connecting rod 22, and second connecting rod 22 keeps away from L shaped plate 21's one end and arc pole 23 articulated, avoid reinforced in-process feeding funnel 2 to block up, influence screening efficiency.

The shaking mechanism comprises a motor 5, the motor 5 is fixedly connected to the position, close to the left side, of the top of a bearing plate 3, a worm 9 is fixedly connected to the power output end of the motor 5, the position, close to the top, of the left side of a box body 1 is fixedly connected with a transverse plate, a first bearing is fixedly connected to the transverse plate, the bottom end of the worm 9 penetrates through the inner cavity of the first bearing and is meshed with a worm wheel 11, a rotating rod 10 penetrates through the inner cavity of the worm wheel 11, a side plate is fixedly connected to the left side of the transverse plate, a second bearing is fixedly connected to the right side of the side plate, close to the top, the left end of the rotating rod 10 is inserted into the inner cavity of the second bearing, a rotating disk 12 is fixedly connected to the right end of the rotating rod 10, a fixed shaft is fixedly connected to the right side of the rotating disk 12, a rectangular groove 13 is sleeved on the outer side of the fixed shaft, a transverse rod 26 is fixedly connected to the right side of the rectangular groove 13, a slotted position, close to the left side of the box body 1 is provided with a slotted cavity, and the right end of the transverse rod 26 penetrates through the slotted inner cavity, a vertical rod 25 is fixedly connected, the upper end and the lower end of the vertical rod 25 are respectively hinged with a first mesh screen 27 and a second mesh screen 28, limiting plates are fixedly connected with the front side and the rear side of the rectangular groove 13, first through holes are formed in the limiting plates, limiting rods are arranged in two first through hole inner cavities in a penetrating manner, the bottom ends of the limiting rods are fixedly connected with a transverse plate, a cam 6 is sleeved on the outer side of the worm 9 close to the bottom end, a push plate 7 is arranged on the right side of the cam 6, a push rod 15 is fixedly connected to the right side of the push plate 7, a second through hole is formed in the left side of the box body 1 close to the bottom, the right end of the push rod 15 penetrates through a second through hole inner cavity and is fixedly connected with the frame body 17, a spring 8 is sleeved on the outer side of the push rod 15, the left end and the right end of the spring 8 are respectively fixedly connected with the push plate 7 and the box body 1, the first mesh screen 27 and the second mesh screen 28 are shaken, the third mesh screen 18 is swung, and the screening efficiency is accelerated, thereby improving productivity of the enterprise.

The working principle is as follows: when the utility model is used, the motor 5 is started through an external power supply, the motor 5 works to drive the worm 9 to rotate, the worm 9 rotates to drive the worm wheel 11 to rotate, the worm wheel 11 rotates to drive the rotating rod 10 to rotate, the rotating rod 10 rotates to drive the rotating disc 12 to rotate, the rotating disc 12 rotates to drive the fixed shaft to rotate in the inner cavity of the rectangular groove 13, so as to drive the rectangular groove 13 to move up and down, the rectangular groove 13 respectively slides up and down on the adjacent limiting rods to limit the rectangular groove 13 through two limiting plates, the rectangular groove 13 moves up and down to drive the cross rod 26 to move up and down in the grooved inner cavity and drive the vertical rod 25 to move up and down, the vertical rod 25 moves up and down to drive the first mesh screen 27 and the second mesh screen 28 to shake up and down, the worm 9 rotates and simultaneously to drive the cam 6 to rotate, the cam 6 rotates to push the push rod 15 to move left and right when being in contact with the push plate 7, and drive the spring 8 to stretch so as to drive the push rod 15 to move left and right, the push rod 15 moves left and right to drive the frame body 17 to move left and right, the frame body 17 moves left and right to drive the first T-shaped rod and the second T-shaped rod to respectively slide in the adjacent inner cavities of the sleeves to limit the position, so that the frame body 17 drives the third mesh screen 18 to move left and right, a worker pours raw materials for pig feed production into the inner cavity of the box body 1 through the feeding funnel 2, the right side of the first mesh screen 27 swings up and down while driving the L-shaped plate 21 to move up and down through the first connecting rod 20, the L-shaped plate 21 moves up and down and drives the left end of the arc-shaped rod 23 to swing up and down through the second connecting rod 22, so that the round ball 24 is driven to continuously knock the bottom of the feeding funnel 2, the feeding funnel 2 is prevented from being blocked during feeding, the screening efficiency is influenced, when the raw materials fall to the top of the first mesh screen 27, the coarse particle raw materials fall into the inner cavity of the top feed collecting tank 19 through the first opening, the top of second mesh screen 28 falls in the raw materials after the one-level screening, through the second grade screening, make well granule raw materials drop through the second opening in bottom fodder collecting vat 19's the inner chamber, fodder after the second grade screening falls in the inner chamber of framework 17, the disintegrating slag in the fine particle raw materials is sieved through third mesh screen 18, and fall and collected in the inner chamber of disintegrating slag collecting vat 16, after the screening, open the door through the handle, the fodder raw materials at third mesh screen 18 top is collected, and carry out recovery processing to the raw materials disintegrating slag in disintegrating slag collecting vat 16, and the production cost is reduced.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (7)

1. The utility model provides a pig is multistage screening plant for feed production convenient to remove, includes box (1), its characterized in that: the feeding device is characterized in that a feeding funnel (2) is inserted in the middle position of the top of the box body (1), a vibration mechanism is arranged on the right side of the feeding funnel (2) close to the bottom, a bearing plate (3) is fixedly connected to the bottom of the box body (1), universal wheels (4) are fixedly connected to the bottom of the bearing plate (3) close to the four corners, a first mesh screen (27) is hinged to the left side of the inner cavity of the box body (1) close to the top, a first opening is formed in the right side of the box body (1) close to the top, the right side of the first mesh screen (27) is inserted in the inner cavity of the first opening, a second mesh screen (28) is arranged at the bottom of the first mesh screen (27), the left side of the second mesh screen (28) is hinged to the left side of the inner cavity of the box body (1), a second opening is formed in the right side of the box body (1) close to the middle position, and the right side of the second mesh screen (28) is inserted in the inner cavity of the second opening, the bottom of second mesh screen (28) is equipped with framework (17), just the inner chamber of framework (17) is close to bottom department and is equipped with third mesh screen (18), the bottom of framework (17) is equipped with disintegrating slag collecting vat (16), the left side of box (1) is equipped with shake mechanism.

2. The conveniently movable multi-stage screening device for pig feed production as claimed in claim 1, wherein: the top of framework (17) is close to left and right sides department and all is equipped with the baffle, two one side that the baffle kept away from mutually all with box (1) fixed connection, and two the contained angle up between the baffle is the obtuse angle, the left and right sides of framework (17) all is equipped with the sleeve pipe, two one side that the sleeve pipe kept away from mutually all with box (1) inner chamber lateral wall fixed connection, be located the left sleeve pipe inner chamber is pegged graft and is had first T shape pole, just the longer one end of first T shape pole T shape structure and the left side fixed connection of framework (17) are located the right side the sleeve pipe inner chamber is pegged graft and is had second T shape pole, just the longer one end of second T shape pole T shape structure and the right side fixed connection of framework (17).

3. The conveniently movable multi-stage screening device for pig feed production as claimed in claim 1, wherein: the right side fixedly connected with rectangle frame (14) of box (1), rectangle frame (14) inner chamber is equipped with two fodder collecting vat (19), and two fodder collecting vat (19) sets up for from top to bottom, two the equal fixedly connected with handle in right side of fodder collecting vat (19) is located the bottom fodder collecting vat (19) is laminated each other with the inner chamber bottom of rectangle frame (14), the fixedly connected with baffle of inner chamber intermediate position department of rectangle frame (14) is located the top the bottom and the baffle top of fodder collecting vat (19) are laminated each other, and two fodder collecting vat (19) are located first open-ended and second open-ended bottom respectively.

4. The conveniently movable multi-stage screening device for pig feed production as claimed in claim 1, wherein: the utility model discloses a refrigerator door, including box (1), door left side, door and box (1), the front side of box (1) is opened and is equipped with the third opening, the front side of box (1) is equipped with the door that matches each other with the third opening, the door left side is equipped with two hinges, the door is through two hinges and box (1) swing joint, the door front side is close to right side department fixedly connected with handle.

5. The conveniently movable multi-stage screening device for pig feed production as claimed in claim 1, wherein: the vibration mechanism comprises a round ball (24), the round ball (24) is positioned in the inner cavity of the box body (1) close to the top, an arc-shaped rod (23) is fixedly connected to the right side of the round ball (24), and one end of the arc-shaped rod (23) far away from the round ball (24) is hinged with the top of the inner cavity of the box body (1), the top of the first mesh screen (27) is hinged with a first connecting rod (20) near the right side, an L-shaped plate (21) is arranged on the right side of the box body (1) close to the top, a sliding block is fixedly connected to the right side of the L-shaped plate (21), a sliding groove is formed on the right side of the box body (1) close to the top, the sliding block is movably connected with the inner cavity of the sliding chute, one end of the first connecting rod (20) far away from the first mesh screen (27) is hinged with the L-shaped plate (21), the top of the L-shaped plate (21) is hinged with the second connecting rod (22), and one end of the second connecting rod (22) far away from the L-shaped plate (21) is hinged with the arc-shaped rod (23).

6. The conveniently movable multi-stage screening device for pig feed production as claimed in claim 1, wherein: the shaking mechanism comprises a motor (5), the motor (5) is fixedly connected to the top of a bearing plate (3) close to the left side, a worm (9) is fixedly connected to the power output end of the motor (5), a transverse plate is fixedly connected to the left side of the box body (1) close to the top, a first bearing is fixedly connected to the transverse plate, the bottom end of the worm (9) penetrates through the inner cavity of the first bearing and is meshed with a worm wheel (11), a rotating rod (10) penetrates through the inner cavity of the worm wheel (11), a side plate is fixedly connected to the left side of the transverse plate, a second bearing is fixedly connected to the right side of the side plate close to the top, the left end of the rotating rod (10) is inserted into the inner cavity of the second bearing, a rotating disc (12) is fixedly connected to the right end of the rotating rod (10), a fixed shaft is fixedly connected to the right side of the rotating disc (12) close to the bottom, and a rectangular groove (13) is sleeved on the outer side of the fixed shaft, the right side fixedly connected with horizontal pole (26) of rectangular channel (13), the fluting has been seted up to box (1) left side department of being close to the top, the right-hand member of horizontal pole (26) runs through the fluting inner chamber to fixedly connected with montant (25), just the upper and lower both ends of montant (25) are articulated with first mesh screen (27) and second mesh screen (28) respectively, the equal fixedly connected with limiting plate in both sides around rectangular channel (13), just first perforation has been seted up on the limiting plate, two first perforation inner chamber all runs through and is equipped with the gag lever post, just the bottom and the diaphragm fixed connection of gag lever post.

7. The conveniently movable multi-stage screening device for pig feed production as claimed in claim 6, wherein: the outside of worm (9) is close to bottom department cover and is equipped with cam (6), just the right side of cam (6) is equipped with push pedal (7), the right side fixedly connected with push rod (15) of push pedal (7), the left side of box (1) is close to bottom department and has seted up the second and perforate, just the right-hand member of push rod (15) runs through the second and perforates the inner chamber to with framework (17) fixed connection, the outside cover of push rod (15) is equipped with spring (8), just both ends respectively with push pedal (7) and box (1) fixed connection about spring (8).