CN112718460A

CN112718460A - Shaking screen mechanism

Info

Publication number: CN112718460A
Application number: CN202011512950.4A
Authority: CN
Inventors: 李卓情; 尹海军; 冯俊龙; 包羽冲; 储茂磊
Original assignee: Yancheng Renchuang Sand Industry Technology Co ltd
Current assignee: Yancheng Renchuang Sand Industry Technology Co ltd
Priority date: 2020-12-20
Filing date: 2020-12-20
Publication date: 2021-04-30

Abstract

The invention provides a shaking screen mechanism which can effectively screen particles such as silica sand and the like, has simple structure and effectively reduces the vibration amplitude and noise of equipment in the working process, and the technical scheme of the shaking screen mechanism comprises a base, a screening bin, a reset mechanism and a swinging driving mechanism, wherein the screening bin is positioned above the base, the swinging driving mechanism is arranged between the base and the screening bin and is used for driving the screening bin to swing, the reset mechanism is connected between the screening bin and the base and is used for resetting the screening bin after swinging, the swinging driving mechanism comprises a supporting rod, a driving wheel, a wedge block and a mandril, the lower end of the supporting rod is fixed on the base, the upper end of the supporting rod is movably connected with the bottom of the screening bin, the driving wheel is sleeved outside the supporting rod and can rotate around the supporting rod, the upper end surface of the driving wheel is fixedly provided with the wedge block, the upper surface, the ejector rod is fixed on the outer bottom surface of the screening bin, and the lower end of the ejector rod is in contact with the wedge-shaped surface of the wedge-shaped block.

Description

Shaking screen mechanism

Technical Field

The invention relates to a classifying and screening mechanism for silica sand particles, in particular to a shaking and screening mechanism.

Background

The mainstream production process of modern casting production is sand casting, and the main raw material is mainly silica sand. The refractoriness, thermal conductivity, granularity and the like of the silica sand can basically meet the production requirements of most castings. The silicon content of the silica sand is improved, chemical sand sticking can be effectively avoided, the good heat conductivity can avoid the defect of shrinkage cavity and shrinkage porosity caused by process thermal bonding of the casting, and the proper grain size distribution can avoid the defect of mechanical sand sticking and air holes of the casting. Proper size grading requires treatment with certain screening equipment to achieve this. The granularity of the raw sand for casting at the present stage is mainly classified by screening, and the granularity of the sand for casting is classified by other methods. The sieving machine utilizes the relative motion of silica sand particles and a sieve surface to make partial particles penetrate through sieve pores, and the silica sand is divided into different particle size compositions according to the particle size. Occupies an important position in the production process of casting materials. A good screening device has a great effect on the production of cast material.

Disclosure of Invention

The invention provides a shaking screen mechanism with a novel structure, which can effectively screen particles such as silica sand and the like, has a simple structure, and effectively reduces the vibration amplitude and noise of equipment in the working process.

The technical scheme of the invention is as follows: including base, screening storehouse, canceling release mechanical system and swing actuating mechanism, the screening storehouse is located the base top, swing actuating mechanism locates between base and the screening storehouse for the drive screening storehouse sways, canceling release mechanical system connects between screening storehouse and the base, is used for making the screening storehouse reset after swaying, swing actuating mechanism includes bracing piece, action wheel, wedge and ejector pin, the bracing piece lower extreme is fixed on the base, and upper end and screening storehouse bottom swing joint, action wheel cover are established outside the bracing piece, can revolve around the bracing piece, and the action wheel up end is fixed with a wedge, the upper surface of wedge is the wedge, and the ejector pin is fixed in the outer bottom surface of screening storehouse, and the wedge contact of its lower extreme and wedge.

Preferably, the upper end of the supporting rod is of a ball-head-shaped structure, a round connecting plate is fixed at the bottom outside the screening bin, a ball-shaped cavity is formed in the center of the connecting plate, an opening is formed in the lowest point of the ball-shaped cavity, the ball head at the upper end of the supporting rod is matched with the ball-shaped cavity of the connecting plate, the diameter of the supporting rod is smaller than that of the ball head, and the opening at the lower end of the ball-shaped cavity is located above the connecting portion between the ball-.

Preferably, the support rod is of a telescopic structure and comprises an inner support rod, an outer sleeve rod and an extension spring, a blind hole is formed in the upper end of the outer sleeve rod, the extension spring is arranged at the bottom of the blind hole, the inner support rod is inserted into the blind hole of the outer sleeve rod from the top, and two ends of the extension spring are fixedly connected with the bottom of the blind hole and the lower end of the inner support rod respectively.

Preferably, a bearing is arranged in a central inner hole of the driving wheel, the bearing is sleeved on an outer sleeve rod of the supporting rod, and the driving wheel is connected with the driving motor through a belt so as to drive the driving wheel to rotate.

Preferably, the thickness value of the wedge-shaped block gradually increases from one end to the other end along the circumferential direction, and a fillet is arranged at the end with the largest thickness value on the wedge-shaped block, so that the lower end of the ejector rod can be smoothly transited to the upper end surface of the driving wheel from the highest point of the wedge-shaped block; the ejector pin is fixed in screening storehouse bottom connecting plate terminal surface down, and when the action wheel rotated, the ejector pin lower extreme can with the wedge face contact of wedge, can drive the screening storehouse through the fluctuation change of wedge and wave around the bulb structure of bracing piece upper end, ejector pin length more than or equal to the maximum thickness of wedge.

Preferably, the top of the screening bin is provided with an opening, a plurality of layers of screens are arranged in the bin, the apertures of the screens are gradually reduced from top to bottom, and the side wall of the screening bin at one side of each layer of screens is provided with a sand outlet.

Preferably, a wedge-shaped block is fixed on the upper end face of the driving wheel, four ejector rods perpendicular to the connecting plate are fixed on the lower end face of the connecting plate, each ejector rod corresponds to one vertex angle of the bottom of the screening bin, balls are arranged at the lower ends of the ejector rods, the lowest points of the lower ends of the four ejector rods are located on the same circle, and the balls are in contact with the wedge-shaped face of the wedge-shaped block.

Preferably, a plurality of wedge blocks are fixed on the upper end face of the driving wheel, the wedge blocks are uniformly distributed along the circumferential direction, the inclined directions of wedge surfaces on the wedge blocks are along the same circumferential direction, an ejector rod perpendicular to the connecting plate is fixed on the lower end face of the connecting plate, a ball is arranged at the lower end of the ejector rod, the ball is in contact with the wedge surface of the wedge block, the ejector rod corresponds to one of the top angles, close to the sand outlet, of the bottom of the screening bin, and the natural extension length of the extension spring corresponding to the top angle is smaller than the natural extension length of the other three extension springs.

Preferably, the reset mechanism comprises four extension springs, the upper ends of the extension springs are fixed at four top corners of the bottom of the screening bin, and the lower ends of the extension springs are fixedly connected with the base.

The invention has the beneficial effects that:

1 through the mode that adopts the screening storehouse body to wave around the bulb structure, make the sand grain incessantly run on each layer screen cloth to the realization is to the effective screening of sand grain. In the process, the screening bin body cannot vibrate up and down or left and right, so that the collision among equipment parts is reduced, and the noise in the working process of the equipment is effectively reduced.

2. The motor can drive the action wheel and realize just reversing for the screening storehouse can wave around the positive and negative direction of bulb structure, wave switching at any time of direction, can effectively guarantee the effect of screening.

Drawings

Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention.

Fig. 2 and 3 are schematic structural views of fig. 1 with the screening chamber and the connecting plate removed.

Fig. 4 is a schematic structural diagram of a swing driving mechanism according to a first embodiment.

Fig. 5 is a schematic structural diagram of a wedge block in the first embodiment.

Fig. 6 is a schematic overall structure diagram of a second embodiment of the present invention.

Fig. 7 and 8 are schematic views of the structure of fig. 6 with the screening chamber and the connecting plate removed.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1, the structure of this embodiment includes a base 1, a screening bin 3, a reset mechanism and a swing driving mechanism, the screening bin 3 is positioned above the base 1, the swing driving mechanism is arranged between the base 1 and the screening bin 3, used for driving the screening bin 3 to swing, the reset mechanism is connected between the screening bin 3 and the base 1, is used for resetting the screening bin 3 after swinging, the swinging driving mechanism comprises a supporting rod 9, a driving wheel 10, a wedge-shaped block 8 and a mandril 7, the lower end of the supporting rod 9 is fixed on the base 1, the upper end is movably connected with the bottom of the screening bin 3, the driving wheel 10 is sleeved outside the supporting rod 9 and can rotate around the supporting rod 9, a wedge block 8 is fixed on the upper end surface of the driving wheel 10, the upper surface of the wedge-shaped block 8 is a wedge-shaped surface, the ejector rod 7 is fixed on the outer bottom surface of the screening bin 3, and the lower end of the ejector rod is in contact with the wedge-shaped surface of the wedge-shaped block 8.

In this embodiment, the upper end of the supporting rod 9 is of a ball-head-shaped structure, the outer bottom of the screening bin 3 is fixed with a circular connecting plate 5, a spherical cavity is arranged in the center of the connecting plate 5, an opening is arranged at the lowest point of the spherical cavity, as shown in fig. 4, a ball head 11 at the upper end of the supporting rod 9 is matched with the spherical cavity of the connecting plate 5, the diameter of the supporting rod 9 is smaller than that of the ball head, and the opening at the lower end of the spherical cavity is located above the connecting part between the ball-head structure and.

In this embodiment, the supporting rod 9 is a telescopic structure and includes an inner supporting rod 12, an outer supporting rod 13 and an extension spring 14, a blind hole is formed in the upper end of the outer supporting rod 13, the extension spring 14 is disposed at the bottom of the blind hole, the inner supporting rod 12 is inserted into the blind hole of the outer supporting rod 13 from above, and two ends of the extension spring 14 are respectively fixedly connected to the bottom of the blind hole and the lower end of the inner supporting rod.

In this embodiment, a bearing 15 is disposed in the central inner hole of the driving wheel 10, the bearing 15 is sleeved on the outer sleeve rod 13 of the supporting rod 9, and the driving wheel 10 is connected with the driving motor 6 through a belt to drive the driving wheel 10 to rotate.

In this embodiment, the thickness value of the wedge block 8 gradually increases from one end to the other end along the circumferential direction, and a fillet is arranged at the end of the wedge block 8 with the largest thickness value, so that the lower end of the ejector rod 7 can be smoothly transited from the highest point of the wedge block 8 to the upper end surface of the driving wheel 10; ejector pin 7 is fixed in screening storehouse 3 bottom connecting plate 5 lower terminal surface, and when action wheel 10 rotated, 7 lower extremes of ejector pin can contact with the wedge surface of wedge 8, can drive screening storehouse 3 through the fluctuation of wedge surface and wave around the bulb structure of bracing piece 9 upper end, and ejector pin 7 length more than or equal to wedge 8's maximum thickness.

In this embodiment, 3 open-tops in screening storehouse are equipped with the multilayer screen cloth in the storehouse, and the aperture of screen cloth from top to bottom reduces gradually, and 3 lateral walls in screening storehouse of every layer of screen cloth one side are equipped with a sand outlet.

In this embodiment, a wedge block 8 is fixed on the upper end surface of the driving wheel 10, four ejector rods 7 perpendicular to the connecting plate 5 are fixed on the lower end surface of the connecting plate 5, each ejector rod 7 corresponds to a vertex angle of the bottom of the screening bin 3, balls are arranged at the lower ends of the ejector rods 7, the lowest points of the lower ends of the four ejector rods 7 are located on the same circle, and the balls are in contact with the wedge surface of the wedge block 8.

In this embodiment, canceling release mechanical system includes four extension springs, and extension spring upper end is fixed in four apex angle departments of 3 bottoms in screening storehouse, lower extreme and base 1 fixed connection.

The working principle of the technical scheme is as follows: sand grains are stored in the screening bin 3, the driving motor is started to work, the driving wheel 10 is driven to rotate through belt transmission, the wedge block 8 can do circular motion along with the rotation of the driving wheel 10, balls at the lower end of the ejector rod 7 can roll on a wedge-shaped surface of the wedge block 8 and slide gradually from the lowest point of the wedge block 8 to the highest point, in the process, the fluctuation of the ejector rod 7 can drive the fluctuation of the upper screening bin 3 corresponding to the vertex angle side, when the wedge block 8 rotates to the lower side of the next ejector rod 7, the ejector rod 7 is driven to fluctuate corresponding to the vertex angle side of the screening bin 3, the previous vertex angle side gradually falls back and resets under the action of the pull force of the pull rope spring, the operation is sequentially carried out according to the mode, and the screening bin 3 can swing spirally around the ball head structure. The sand grains are screened and classified gradually along with the vortex-shaped swing of the bin body in the screening bin 3. In order to improve the screening effect, the positive and negative rotation of the motor can be set, and when the motor rotates reversely, the shaking direction of the screening bin 3 can be changed, so that the screening effect of the screening bin 3 on sand grains is better.

Example two

On the basis of the first embodiment, the number of the wedge blocks 8 and the number of the push rods 7 on the driving wheel 10 are further improved, and another embodiment is obtained.

On the same basis of other structures, action wheel 10 up end is fixed with polylith wedge 8, wedge 8 is along circumferencial direction evenly distributed, and the wedge incline direction on the wedge 8 is along same circumferencial direction, the terminal surface is fixed with one and 5 vertically ejector pins 7 of connecting plate under the connecting plate 5, the 7 lower extremes of ejector pin are equipped with the ball, ball and wedge 8's wedge contact, one of them apex angle that

ejector pin

7 and 3 bottoms in screening storehouse are close to the sand outlet corresponds, and the extension length of the extension spring that this apex angle corresponds is less than the length of other three extension spring natural extensions.

In this embodiment, in a natural state, the screening bin 3 is inclined toward a shorter vertex angle side of the extension spring, and the same vertex angle 7 is sequentially lifted and dropped through the plurality of wedge-shaped blocks 8, so that a pitching motion is formed on one side of the vertex angle corresponding to the vertex angle 7 on the screening bin 3, and therefore, sand particles can be bumped on a screen of the screening bin 3, and screening and grading of the sand particles are effectively achieved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a sieve shaking mechanism which characterized in that: including base, screening storehouse, canceling release mechanical system and swing actuating mechanism, the screening storehouse is located the base top, swing actuating mechanism locates between base and the screening storehouse for the drive screening storehouse sways, canceling release mechanical system connects between screening storehouse and the base, is used for making the screening storehouse reset after swaying, swing actuating mechanism includes bracing piece, action wheel, wedge and ejector pin, the bracing piece lower extreme is fixed on the base, and upper end and screening storehouse bottom swing joint, action wheel cover are established outside the bracing piece, can revolve around the bracing piece, and the action wheel up end is fixed with a wedge, the upper surface of wedge is the wedge, and the ejector pin is fixed in the outer bottom surface of screening storehouse, and the wedge contact of its lower extreme and wedge.

2. The shaker mechanism as in claim 1, wherein: the utility model discloses a screening storehouse, including screening storehouse, bracing piece, round connecting plate, connecting plate center, the bottom of screening storehouse, the bracing piece upper end is bulb column structure, screening storehouse outer bottom is fixed with circular connecting plate, and the bottom of connecting plate center is equipped with globular cavity, the minimum department of globular cavity is equipped with the opening, the bulb of bracing piece upper end with the cooperation of the globular cavity of connecting plate, the diameter of bracing piece is less than the diameter of bulb, and the opening is located bulb column structure and bracing piece connecting portion.

3. The shaker mechanism as in claim 2, wherein: the support rod is of a telescopic structure and comprises an inner support rod, an outer support rod and an extension spring, a blind hole is formed in the upper end of the outer support rod, the extension spring is arranged at the bottom of the blind hole, the inner support rod is inserted into the blind hole of the outer support rod from the top, and two ends of the extension spring are fixedly connected with the bottom of the blind hole and the lower end of the inner support rod respectively.

4. The shaker mechanism as in claim 3, wherein: the bearing is arranged in the central inner hole of the driving wheel, the bearing sleeve is arranged on the outer sleeve rod of the supporting rod, and the driving wheel is connected with the driving motor through a belt so as to drive the driving wheel to rotate.

5. The shaker mechanism as in claim 4, wherein: the thickness value of the wedge-shaped block is gradually increased from one end to the other end along the circumferential direction, and a fillet is arranged at the end with the largest thickness value on the wedge-shaped block, so that the lower end of the ejector rod can be smoothly transited to the upper end face of the driving wheel from the highest point of the wedge-shaped block; the ejector pin is fixed in screening storehouse bottom connecting plate terminal surface down, and when the action wheel rotated, the ejector pin lower extreme can with the wedge face contact of wedge, can drive the screening storehouse through the fluctuation change of wedge and wave around the bulb structure of bracing piece upper end, ejector pin length more than or equal to the maximum thickness of wedge.

6. The shaker mechanism as in claim 5, wherein: the top opening of the screening bin is provided with a plurality of layers of screen meshes in the bin, the apertures of the screen meshes from top to bottom are gradually reduced, and the side wall of the screening bin on one side of each layer of screen mesh is provided with a sand outlet.

7. The shaker mechanism as in claim 6, wherein: the upper end face of the driving wheel is fixedly provided with a wedge block, the lower end face of the connecting plate is fixedly provided with four ejector rods perpendicular to the connecting plate, each ejector rod corresponds to one vertex angle of the bottom of the screening bin, the lower ends of the ejector rods are provided with balls, the lowest points of the lower ends of the four ejector rods are located on the same circle, and the balls are in contact with the wedge face of the wedge block.

8. The shaker mechanism as in claim 6, wherein: the sand outlet device is characterized in that a plurality of wedge blocks are fixed on the upper end face of the driving wheel, the wedge blocks are uniformly distributed along the circumferential direction, the inclined direction of the wedge faces on the wedge blocks is along the same circumferential direction, an ejector rod perpendicular to the connecting plate is fixed on the lower end face of the connecting plate, balls are arranged at the lower end of the ejector rod, the balls are in contact with the wedge faces of the wedge blocks, the ejector rod corresponds to one of the top angles, close to the sand outlet, of the bottom of the screening bin, and the natural extension length of the extension spring corresponding to the top angle is smaller than the natural extension length of other three.

9. The shaker mechanism as in claim 7 or 8, wherein: the reset mechanism comprises four extension springs, the upper ends of the extension springs are fixed at four vertex angles at the bottom of the screening bin, and the lower ends of the extension springs are fixedly connected with the base.