Sand mold raw material bearingless mixing equipment

Abstract

The utility model discloses bearing-free mixing equipment for sand mould raw materials, which comprises a sand mixing barrel main body and a sand mixing barrel bottom arranged at the lower end of the sand mixing barrel main body, and a sand unloading door is arranged on the round outer wall of the right end of the sand mixing barrel main body so that the sand mould raw materials can be discharged outwards. A plurality of wear-resisting plates are arranged in the sand mixing barrel body to mix sand mold raw materials in the sand mixing barrel body, and the ends, making contact with the circular inner wall of the sand mixing barrel body, of the wear-resisting plates are fixedly connected with sand scraping plates to scrape down the sand mold raw materials attached to the inner wall of the sand mixing barrel body. A vertical sand discharging hopper is arranged on the right side of the sand mixing barrel body so that mixed sand mold raw materials can be discharged outwards, a bearing on a traditional driving shaft is taken down, and the sand mold raw materials in the sand mixing barrel body permeate downwards through a gap between the sand mixing barrel body and the driving shaft; the driving shaft can be prevented from being affected by sand mold raw materials in the rotating process, and the situation that the driving shaft is stuck and cannot rotate is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field related to the mixing of sand mold raw materials, and specifically relates to a bearingless mixing device for sand mold raw materials. Background Technique

[0002] A sand mixer is a common sand mold raw material mixing device. It usually consists of a rotating barrel with stirring blades for mixing sand and other raw materials. The sand mixer can evenly mix various raw materials and ensure that the mixed sand mold raw materials have consistent properties. However, when the traditional drive rod drives the stirring blades inside the stirring bucket to rotate, during the stirring and mixing process, the bearings inside the rotating shaft are easily blocked by the materials leaking downward from the gap between the bearings and the stirring bucket, resulting in the shaft getting stuck and unable to rotate, and even breaking. Content of the Utility Model

[0003] The purpose of the utility model is to provide a bearingless mixing device for sand mold raw materials to solve the problem that the bearings inside the rotating shaft are easily blocked by the materials leaking downward from the gap between the bearings and the stirring bucket during the stirring and mixing process as mentioned in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A bearingless mixing device for sand mold raw materials, including a main body of the sand mixing barrel and a bottom of the sand mixing barrel installed at the lower end of the main body of the sand mixing barrel;

[0005] A discharge door is provided on the circular outer wall at the right end of the main body of the sand mixing barrel for discharging the sand mold raw materials outward;

[0006] A plurality of wear-resistant plates are arranged inside the main body of the sand mixing barrel to mix the sand mold raw materials inside the main body of the sand mixing barrel;

[0007] One end of each of the plurality of wear-resistant plates in contact with the circular inner wall of the main body of the sand mixing barrel is fixedly connected with a scraping plate to scrape off the sand mold raw materials attached to the inner wall of the main body of the sand mixing barrel. A vertical sand discharging hopper is arranged on the right side of the main body of the sand mixing barrel for discharging the mixed sand mold raw materials outward;

[0008] A drive shaft is internally connected by transmission at the bottom of the sand mixing barrel. A connecting head a is fixedly connected to the outer wall of the upper end of the drive shaft to limit the position of the drive shaft. A cover plate is fixedly connected to the outer wall of the upper end of the connecting head a for fixed connection with the wear-resistant plate.

[0009] Preferably, a support rod penetrating downward through the inside of the connecting head a is fixedly connected to the outer wall of the upper end of the cover plate for fixed connection between the connecting head a and the cover plate. A drive motor is fixedly connected to the outer wall of the lower end of the drive shaft to drive the drive shaft to rotate. A spiral shaft is fixedly connected to the circular outer wall of the drive shaft.

[0010] Preferably, a driving motor is fixedly connected to the outer wall of the right end of the transmission motor, and both the transmission motor and the driving motor are electrically connected to an external power source.

[0011] Preferably, a sealing plate is arranged on the right side of the sand discharge door to block the opening of the sand discharge door. A sand door plate is fixedly connected to the outer wall of the right end of the sealing plate, a cylinder connecting plate is fixedly connected to the outer wall of the right end of the sand door plate, a connecting head b is fixedly connected to the center of the outer wall of the right end of the cylinder connecting plate, and a cover plate is arranged below the sand discharge door.

[0012] Preferably, a cylinder body is fixedly connected to the outer wall of the right end of the connecting head b to drive the sealing plate to control the opening and closing of the sand discharge door. A sand guide cover is arranged below the cylinder body. A cylinder is fixedly connected to the outer wall of the left end of the sand guide cover, and a rubber cover is arranged inside the cylinder.

[0013] Preferably, a cylinder fixing bracket a and a cylinder fixing bracket b are respectively fixedly connected to the outer wall of the upper end of the cylinder and are respectively close to the left and right sides to limit the position of the cylinder body. A cylinder fixing bracket c is arranged at the lower end of the cylinder body, and a supporting plate is fixedly connected to the outer wall of the upper end of the cylinder fixing bracket a.

[0014] Preferably, a sand door cover bracket is fixedly connected to the outer wall of the upper end of the cylinder. A sand door cover left and a sand door cover right are respectively arranged on the outer wall of the right end of the sand door cover bracket and are respectively close to the front and back sides. Hinges are fixedly connected between the sand door cover left and the sand door cover right and the sand door cover bracket to limit the opening and closing angles of the sand door cover left and the sand door cover right. A lock is fixedly connected between the sand door cover left and the sand door cover right to limit the positions between the sand door cover left and the sand door cover right. A fixing frame a is fixedly connected between the outer wall of the lower end of the sand door cover bracket and the sand guide cover, and a fixing frame b and a fixing frame c are respectively arranged at the lower end of the fixing frame a.

[0015] Preferably, a baffle main body is fixedly connected to the circular outer wall of the right end of the sand mixing barrel main body. A plurality of linear shaft seats are fixedly connected at equal intervals between the outer walls of the right end of the baffle main body. Blow pipes are embedded in the outer walls of the right ends of the plurality of linear shaft seats. Pipe clamps are arranged between the circular outer walls of the plurality of blow pipes and the sand door cover left and the sand door cover right to limit the positions of the blow pipes. Shaft seat main bodies are fixedly connected to the other ends of the two guide shafts to limit the positions of the guide shafts.

[0016] Preferably, guide shafts are fixedly connected to the inner walls of the opposite sides of the sand door cover left and the sand door cover right. Induction blocks are fixedly connected to the outer walls of the upper ends of the two guide shafts. Connecting pieces a and b are respectively sleeved on the circular outer walls of the two guide shafts to be fixedly connected to the sand door plate. Baffles b are arranged on the inner walls of the opposite sides of the sand door cover left and the sand door cover right.

[0017] Preferably, a wear-resistant pressing plate is fixedly connected to the circular inner wall of the sand mixing barrel body, a housing is fixedly connected to the circular outer wall of the sand mixing barrel body, support bodies a are fixedly connected to the lower outer walls of the sand door cover support, respectively, near the front and rear sides, a support body b is fixedly connected between the sand door cover support and the sand guide cover, a baffle a is fixedly connected to the left circular outer wall of the sand mixing barrel body, a backing plate a is arranged on the circular inner wall of the wear-resistant plate, and a backing plate b is fixedly connected to the lower outer wall of the sand mixing barrel body.

[0018] Compared with the prior art, the present utility model provides a sand mold raw material bearingless mixing device, which has the following beneficial effects:

[0019] By removing the bearing on the traditional drive shaft, during the stirring and mixing process of the sand mold raw materials, when the sand mold raw materials inside the sand mixing barrel body penetrate downward through the gap between the sand mixing barrel body and the drive shaft, it can avoid the influence of the sand mold raw materials on the drive shaft during rotation, prevent the situation of being stuck and unable to rotate, and at the same time can extend the service life of the drive shaft, reduce the equipment maintenance and replacement costs, and there is no need to frequently repair and replace the drive shaft. After the sand mold raw materials penetrate, it can also maintain stable operation, improving production efficiency and production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a sand mold raw material bearingless mixing device of the present utility model.

[0021] Figure 2 It is a schematic top view structural diagram of a sand mold raw material bearingless mixing device of the present utility model.

[0022] Figure 3 It is a schematic front sectional structural diagram of a sand mold raw material bearingless mixing device of the present utility model.

[0023] Figure 4 It is a schematic partial structural diagram of the sand mixing barrel of the present utility model.

[0024] Figure 5 It is a schematic vertically sectional structural diagram of the sand mixing barrel part of the present utility model.

[0025] Figure 6 It is a schematic partial top view structural diagram of the sand mixing barrel part of the present utility model.

[0026] Figure 7 It is a schematic front sectional structural diagram of the sand mixing barrel part of the present utility model.

[0027] In the figure: 1, baffle main body; 2, cylinder main body; 3, supporting plate; 4, spiral shaft; 5, hinge; 6, connecting head a; 7, sand mixing barrel main body; 8, driving shaft; 9, sand scraping plate; 10, fixing bracket a; 11, lock; 12, shaft seat main body; 13, driving motor; 14, driving motor; 15, bottom of sand mixing barrel; 16, baffle a; 17, sealing plate; 18, fixing bracket b; 19, fixing bracket c; 20, connecting head b; 21, cover plate; 22, sand discharging door; 23, sand guiding cover; 24, housing; 25, cylinder connecting plate; 26, guiding shaft; 27, induction block; 28, linear shaft seat; 29, supporting rod; 30, connecting part a; 31, connecting part b; 32, cover plate; 33, bracket main body a; 34, bracket main body b; 35, sand door plate; 36, sand door cover bracket; 37, cushion plate a; 38, air blowing pipe; 39, cylinder fixing bracket a; 40, cylinder fixing bracket b; 41, left sand door cover; 42, right sand door cover; 43, wear-resistant plate; 44, wear-resistant pressing plate; 45, cylinder fixing bracket c; 46, cushion plate b; 47, cylinder body; 48, baffle b; 49, rubber cover; 50, pipe clamp; 51, vertical sand discharging hopper. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention provides a Figure 1-3 sand mold raw material bearingless mixing device as shown, including a sand mixing barrel main body 7 and a bottom of the sand mixing barrel 15 installed at the lower end of the sand mixing barrel main body 7;

[0030] A sand discharging door 22 is provided on the circular outer wall at the right end of the sand mixing barrel main body 7 for discharging the sand mold raw material outwards;

[0031] A plurality of wear-resistant plates 43 are arranged inside the sand mixing barrel main body 7 to mix the sand mold raw materials inside the sand mixing barrel main body 7;

[0032] One end of each of the plurality of wear-resistant plates 43 in contact with the circular inner wall of the sand mixing barrel main body 7 is fixedly connected with a sand scraping plate 9 to scrape off the sand mold raw materials adhering to the inner wall of the sand mixing barrel main body 7. A vertical sand discharging hopper 51 is arranged on the right side of the sand mixing barrel main body 7 for discharging the mixed sand mold raw materials outwards;

[0033] Inside the bottom 15 of the sand mixing bucket, a drive shaft 8 is internally connected by transmission. On the outer wall of the upper end of the drive shaft 8, a connecting head a6 is fixedly connected to limit the position of the drive shaft 8. On the outer wall of the upper end of the connecting head a6, a cover plate 32 is fixedly connected for fixed connection with the wear-resistant plate 43. When mixing and stirring the sand mold raw materials, by adding the sand mold raw materials into the main body 7 of the sand mixing bucket, under the action of multiple wear-resistant plates 43 arranged in the bucket, the sand mold raw materials are stirred and mixed. The wear-resistant plate 43 contacts the circular inner wall of the main body 7 of the sand mixing bucket and is fixedly connected with a scraping plate 9. The function of the scraping plate 9 is to scrape off the sand mold raw materials adhering to the inner wall of the main body 7 of the sand mixing bucket, thereby promoting the mixing effect. The cover plate 32 connected to the wear-resistant plate 43 is driven by the drive shaft 8 to drive the wear-resistant plate 43 to rotate. After stirring the sand mold raw materials for a certain period of time, the stirred sand mold raw materials are discharged through the sand discharge door 22 and guided outward through the vertical sand hopper 51.

[0034] As Figure 3 and Figure 7 shown, on the outer wall of the upper end of the cover plate 32, a support rod 29 that penetrates downward into the inside of the connecting head a6 is fixedly connected to fix the connection between the connecting head a6 and the cover plate 32. On the outer wall of the lower end of the drive shaft 8, a transmission motor 13 is fixedly connected to drive the drive shaft 8 to rotate. On the circular outer wall of the drive shaft 8, a spiral shaft 4 is fixedly connected. On the outer wall of the right end of the transmission motor 13, a drive motor 14 is fixedly connected. Both the transmission motor 13 and the drive motor 14 are electrically connected to an external power source.

[0035] When the drive shaft 8 rotates, the drive motor 14 is powered on by an external power source. When the drive motor 14 is working, it will transmit kinetic energy to the inside of the transmission motor 13 through transmission gears, and drive the drive shaft 8 to rotate at high speed through the transmission motor 13, so as to drive the wear-resistant plate 43 to mix and stir the sand mold raw materials inside the main body 7 of the sand mixing bucket.

[0036] As Figure 4 and Figure 7 shown, on the right side of the sand discharge door 22, a sealing plate 17 is provided to block the opening of the sand discharge door 22. On the outer wall of the right end of the sealing plate 17, a sand door plate 35 is fixedly connected. On the outer wall of the right end of the sand door plate 35, a cylinder connecting plate 25 is fixedly connected. At the center of the outer wall of the right end of the cylinder connecting plate 25, a connecting head b20 is fixedly connected. Below the sand discharge door 22, a cover plate 21 is provided.

[0037] When mixing and stirring the sand mold raw materials inside the main body 7 of the sand mixing bucket, at this time, the sand discharge door 22 fills the sealing plate 17 to prevent the leakage of raw materials during the stirring process.

[0038] As Figure 4 and Figure 6As shown in the figure, the outer wall of the right end of the connector b20 is fixedly connected with a cylinder body 2 to drive a sealing plate 17 to control the opening and closing of the sand discharge door 22. A sand guide cover 23 is arranged on the lower side of the cylinder body 2. The outer wall of the left end of the sand guide cover 23 is fixedly connected with a cylinder body 47. A rubber cover 49 is arranged inside the cylinder body 47. The outer walls of the upper end of the cylinder body 47 and near the left and right sides respectively are fixedly connected with a cylinder fixing bracket a39 and a cylinder fixing bracket b40 to limit the position of the cylinder body 2. The lower end of the cylinder body 2 is provided with a cylinder fixing bracket c45. The outer wall of the upper end of the cylinder fixing bracket a39 is fixedly connected with a support plate 3.

[0039] When it is necessary to discharge raw materials through the sand discharge door 22, the cylinder body 2 is connected with the cylinder connecting plate 25 on the right side of the sealing plate 17 through the connector b20, and drives the sealing plate 17 to move to the right. At this time, the sand discharge door 22 can be opened for sand discharging operation. The raw materials discharged through the sand discharge door 22 will fall into the vertical sand hopper 51 and be discharged outward. During the discharging process, the rubber cover 49 is used to reduce the noise when the discharged sand mold raw materials collide with the vertical sand hopper 51. The position of the cylinder body 2 is limited by the cylinder fixing bracket a39, the cylinder fixing bracket b40 and the cylinder fixing bracket c45.

[0040] As Figure 6 shown in the figure, the outer wall of the upper end of the cylinder body 47 is fixedly connected with a sand door cover bracket 36. The sand door cover left 41 and the sand door cover right 42 are respectively arranged on the outer wall of the right end of the sand door cover bracket 36 and near the front and rear sides. Hinges 5 are fixedly connected between the sand door cover left 41 and the sand door cover right 42 and the sand door cover bracket 36 to limit the opening and closing angles of the sand door cover left 41 and the sand door cover right 42. A lock catch 11 is fixedly connected between the sand door cover left 41 and the sand door cover right 42 to limit the position between the sand door cover left 41 and the sand door cover right 42. A fixing frame a10 is fixedly connected between the outer wall of the lower end of the sand door cover bracket 36 and the sand guide cover 23. Fixing frames b18 and c19 are respectively arranged at the lower end of the fixing frame a10.

[0041] The sand door cover bracket 36 is arranged on the cylinder body 2, and the cylinder body 2 is shielded and protected by the sand door cover left 41 and the sand door cover right 42. When it is necessary to repair the cylinder body 2, by unlocking the lock catch 11, at this time, the sand door cover left 41 and the sand door cover right 42 can be flipped to the left and right sides under the limitation of the hinge 5. At this time, the cylinder body 2 can be exposed for maintenance and inspection operations.

[0042] As Figure 4 and Figure 5As shown in the figure, a baffle main body 1 is fixedly connected to the right-end circular outer wall of the sand mixing bucket main body 7. A plurality of linear shaft seats 28 are fixedly connected at equal intervals between the right-end outer walls of the baffle main body 1. The right-end outer walls of the plurality of linear shaft seats 28 are all embedded with air blowing pipes 38. Pipe clamps 50 are arranged between the circular outer walls of the plurality of air blowing pipes 38 and the left sand door cover 41 and the right sand door cover 42 to limit the positions of the air blowing pipes 38. The other ends of the two guiding shafts 26 are both fixedly connected with shaft seat main bodies 12 to limit the positions of the guiding shafts 26. The left sand door cover 41 and the right sand door cover 42 are both fixedly connected with guiding shafts 26 on the inner walls of the opposite surfaces. Induction blocks 27 are fixedly connected to the upper-end outer walls of the two guiding shafts 26. Connecting pieces a30 and connecting pieces b31 are respectively sleeved on the circular outer walls of the two guiding shafts 26 for fixed connection with the sand door plate 35. Baffles b48 are arranged on the inner walls of the opposite surfaces of the left sand door cover 41 and the right sand door cover 42.

[0043] When the cylinder main body 2 is working, the air is conveyed or discharged through the air blowing pipe 38 to control the cylinder main body 2 to drive the sealing plate 17 to move. When the air is input through the air blowing pipe 38, the sealing plate 17 is driven to block the sand discharging door 22. When the air is discharged, the sealing plate 17 is driven away from the sand discharging door 22 to control the sand mold raw materials to be discharged outwards. When driving the sealing plate 17 to move, stable lateral movement is carried out on the guiding shaft 26 through the connecting piece a30 and the connecting piece b31, so as to avoid the situation of shaking or being unable to completely fill the opening of the sand discharging door 22 when driving the sealing plate 17 to move. The maximum positions of the movement of the connecting piece a30 and the connecting piece b31 can be limited through the induction block 27. When the induction block 27 senses the connecting piece a30 and the connecting piece b31, the work of the cylinder main body 2 can be stopped, and the cylinder main body 2 can be controlled to continue working again after the sand discharging door 22 discharges the sand mold raw materials.

[0044] As Figure 4 As shown in the figure, a wear-resistant pressing plate 44 is fixedly connected to the circular inner wall of the sand mixing bucket main body 7. A housing 24 is fixedly connected to the circular outer wall of the sand mixing bucket main body 7. Support main bodies a33 are fixedly connected to the lower-end outer walls of the sand door cover support 36 and are respectively close to the front and rear sides. A support main body b34 is fixedly connected between the sand door cover support 36 and the sand guiding cover 23. A baffle a16 is fixedly connected to the left-end circular outer wall of the sand mixing bucket main body 7. A backing plate a37 is arranged on the circular inner wall of the wear-resistant plate 43. A backing plate b46 is fixedly connected to the lower-end outer wall of the sand mixing bucket main body 7.

[0045] The thickness of the circular inner wall of the sand mixing bucket main body 7 is increased through the wear-resistant pressing plate 44, and at the same time, the inner wall of the sand mixing bucket main body 7 is prevented from being worn by the scraping plate 9. The positions of the sand mixing bucket main body 7 are limited through the connection between the backing plate a37 and the backing plate b46 and the external base.

[0046] The implementation principle of this embodiment is as follows: When mixing and stirring the sand mold raw materials, the sand mold raw materials are added into the main body 7 of the sand mixing bucket. Under the action of multiple wear-resistant plates 43 arranged in the bucket, the sand mold raw materials are stirred and mixed. The wear-resistant plates 43 are in contact with the circular inner wall of the main body 7 of the sand mixing bucket and fixedly connected with scraping plates 9. The function of the scraping plates 9 is to scrape off the sand mold raw materials attached to the inner wall of the main body 7 of the sand mixing bucket, thereby promoting the mixing effect. The cover plate 32 connected between the driving shaft 8 and the wear-resistant plates 43 drives the wear-resistant plates 43 to rotate. After stirring the sand mold raw materials for a certain period of time, the stirred sand mold raw materials are discharged through the sand discharge door 22 and guided out through the vertical sand hopper 51.

[0047] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bearingless mixing device for sand mold raw materials, comprising a guide shaft (26), a sand mixing barrel body (7), and a sand mixing barrel bottom (15) mounted at the lower end of the sand mixing barrel body (7); The circular outer wall at the right end of the sand mixing barrel body (7) is provided with a sand discharge door (22) for discharging the sand mold raw materials outwards; A plurality of wear-resistant plates (43) are arranged inside the sand mixing barrel body (7) to mix the sand mold raw materials inside the sand mixing barrel body (7); The ends of the plurality of wear-resistant plates (43) contacting the circular inner wall of the sand mixing barrel body (7) are fixedly connected with a scraping plate (9) to scrape off the sand mold raw materials attached to the inner wall of the sand mixing barrel body (7); a vertical lower sand hopper (51) is arranged on the right side of the sand mixing barrel body (7) to discharge the sand mold raw materials after mixing; Features: The bottom (15) of the sand mixing barrel is internally connected to a driving shaft (8), the upper outer wall of the driving shaft (8) is fixedly connected to a connector a (6) to limit the position of the driving shaft (8), and the upper outer wall of the connector a (6) is fixedly connected to a cover plate (32) to be fixedly connected to the wear-resistant plate (43).

2. A bearingless mixing device for sand mold raw materials according to claim 1, characterized in that: The upper outer wall of the cover plate (32) is fixedly connected to a support rod (29) that passes downwardly through the interior of the connector a (6) to fixedly connect the connector a (6) and the cover plate (32); the lower outer wall of the drive shaft (8) is fixedly connected to a transmission motor (13) to drive the drive shaft (8) to rotate; and the circular outer wall of the drive shaft (8) is fixedly connected to a rotary shaft (4).

3. A bearingless mixing device for sand mold raw materials according to claim 2, characterized in that: The right end outer wall of the transmission motor (13) is fixedly connected to a driving motor (14), and both the transmission motor (13) and the driving motor (14) are electrically connected to an external power source.

4. A bearingless mixing device for sand mold raw materials according to claim 1, characterized in that: A sealing plate (17) is provided on the right side of the sand unloading door (22) to cover the opening of the sand unloading door (22); a sand gate plate (35) is fixedly connected to the right end outer wall of the sealing plate (17); a cylinder connecting plate (25) is fixedly connected to the right end outer wall of the sand gate plate (35); a connector b (20) is fixedly connected to the center of the right end outer wall of the cylinder connecting plate (25); and a cover plate (21) is provided on the lower side of the sand unloading door (22).

5. A bearingless mixing device for sand mold raw materials according to claim 4, characterized in that: The right end outer wall of the connector b (20) is fixedly connected to a cylinder body (2) to drive a sealing plate (17) to control the opening and closing of a sand unloading door (22); a sand guide cover (23) is arranged on the lower side of the cylinder body (2); the left end outer wall of the sand guide cover (23) is fixedly connected to a cylinder body (47); a rubber cover (49) is arranged inside the cylinder body (47).

6. A bearingless mixing device for sand mold raw materials according to claim 5, characterized in that: The outer wall of the upper end of the cylinder body (47) is fixedly connected to a cylinder fixing bracket a (39) and a cylinder fixing bracket b (40) respectively near the left and right sides to limit the position of the cylinder body (2); a cylinder fixing bracket c (45) is provided at the lower end of the cylinder body (2); and the outer wall of the upper end of the cylinder fixing bracket a (39) is fixedly connected to a support plate (3).

7. A bearingless mixing device for sand mold raw materials according to claim 5, characterized in that: The upper outer wall of the cylinder (47) is fixedly connected to a sand gate cover bracket (36); a left sand gate cover (41) and a right sand gate cover (42) are respectively arranged on the right outer wall of the sand gate cover bracket (36) and close to the front and rear sides; hinges (5) are fixedly connected between the left sand gate cover (41) and the right sand gate cover (42) and the sand gate cover bracket (36) to limit the opening and closing angles of the left sand gate cover (41) and the right sand gate cover (42); a lock buckle (11) is fixedly connected between the left sand gate cover (41) and the right sand gate cover (42) to limit the position between the left sand gate cover (41) and the right sand gate cover (42); a fixing frame a (10) is fixedly connected between the lower outer wall of the sand gate cover bracket (36) and the sand guide cover (23); and a fixing frame b (18) and a fixing frame c (19) are respectively arranged at the lower end of the fixing frame a (10).

8. The bearingless mixing device for sand mold raw materials according to claim 1, characterized in that: The right circular outer wall of the sand mixing barrel body (7) is fixedly connected to a baffle body (1), and a plurality of linear shaft seats (28) are fixedly connected between the right outer walls of the baffle body (1) at equal intervals. The right outer walls of the plurality of linear shaft seats (28) are all embedded with air blowing pipes (38), and pipe clamps (50) are provided between the circular outer walls of the plurality of air blowing pipes (38) and the left sand door cover (41) and the right sand door cover (42) to limit the position of the air blowing pipes (38), and the other ends of the two guide shafts (26) are fixedly connected to a shaft seat body (12) to limit the position of the guide shafts (26).

9. A bearingless mixing device for sand mold raw materials according to claim 7, characterized in that: The inner walls of the opposite surfaces of the left sand gate cover (41) and the right sand gate cover (42) are fixedly connected with guide shafts (26), the upper outer walls of the two guide shafts (26) are fixedly connected with sensing blocks (27), the circular outer walls of the two guide shafts (26) are respectively sleeved with connecting pieces a (30) and connecting pieces b (31) to be fixedly connected with the sand gate plate (35), and the inner walls of the opposite surfaces of the left sand gate cover (41) and the right sand gate cover (42) are provided with baffles b (48).

10. A bearingless mixing device for sand mold raw materials according to claim 9, characterized in that: The circular inner wall of the sand mixing barrel body (7) is fixedly connected with a wear-resistant pressure plate (44), the circular outer wall of the sand mixing barrel body (7) is fixedly connected with a cover shell (24), the lower end outer wall of the sand gate cover bracket (36) and the front and rear sides thereof are fixedly connected with a bracket body a (33), the sand gate cover bracket (36) and the sand guide cover (23) are fixedly connected with a bracket body b (34), the left end circular outer wall of the sand mixing barrel body (7) is fixedly connected with a baffle a (16), the circular inner wall of the wear-resistant plate (43) is provided with a pad a (37), and the lower end outer wall of the sand mixing barrel body (7) is fixedly connected with a pad b (46).

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