Discharging mechanism of concrete mixing tank

Abstract

The utility model discloses a discharging mechanism of a concrete mixing tank, the discharging mechanism comprises a moving assembly and a sealing assembly, the moving assembly is connected with the sealing assembly, so that the moving assembly drives the sealing assembly to move, the sealing assembly comprises a tank door and a sealing ring, the sealing ring is connected with the tank door, and a chamfer is arranged on the sealing ring. And the sealing ring has a certain length, so that the sealing ring is still parallel to the rim at the discharge port of the tank body after being abraded, and further, stable sealing can still be achieved after the sealing assembly is moved through the moving assembly. The discharging mechanism has the effect of improving the durability and the sealing performance of the discharging mechanism of the concrete stirring tank.

Description

Technical Field

[0001] The present application relates to the field of engineering machinery technology, and in particular to a discharging mechanism of a concrete mixing tank. Background Art

[0002] For concrete mixer trucks used underground, the mixing tank on the truck body is usually placed horizontally, that is, the center line of the mixing tank is parallel to the ground. The biggest advantage of this type of mixing tank placed horizontally on the truck body is that a closed door is provided at the discharge port to seal the discharge port. In this way, 80% of the concrete of its geometric volume can be loaded inside the tank body.

[0003] However, there are still technical problems such as poor sealing and poor durability for the closed door of the discharge port.

[0004] The Chinese invention patent application with application publication number CN110039658A discloses an arrangement and sealing method of a mixing tank of a metal mine underground concrete mixer truck, which discloses that: the discharge port cover is an outer cone surface, the discharge port is an inner cone surface, and the sealing of the mixing tank is achieved by imitating the 74° hydraulic joint body sealing principle. This 74° hydraulic joint body sealing principle requires high surface accuracy of the inner and outer cone surfaces, and the diameter range at the discharge port is in the range of φ300 to φ500. Therefore, the surface accuracy of the inner and outer cone surfaces needs to be guaranteed by machine tool processing, so the production and processing cost is high.

[0005] The Chinese utility model patent with the authorization announcement number CN205380779U discloses a horizontally placed mixing drum and a mixing truck, which discloses: "The principle of the discharge port and the second sealing door: the discharge port is made into a cone and welded to the rear end of the mixing drum, the sealing door welding seat is welded to the center of the drum, and then the tightening screw is welded to the sealing door welding seat, and the sealing rubber is installed on the rear end sealing door body, and then the sealing door is installed on the tightening screw. The rear end tightening handle is rotated to achieve the purpose of feeding or retracting the rear end sealing door body, thereby achieving the purpose of sealing or opening the rear end sealing door. In other embodiments, the sealing form of the second sealing door can be a cone seal or an end face seal."

[0006] For the sealing rubber, no matter whether it is a cone seal or an end seal, the sealing rubber will be worn rapidly due to continuous friction with the aggregate in the concrete in the tank body. Concrete contains lime, which is alkaline and thus corrosive to the sealing rubber. The moisture in the concrete will cause the sealing rubber to age. Therefore, the above technical solution has the problem of not being durable in sealing.

[0007] For the sealing technology of the discharge port, in addition to the sealing material, its shape and structure are also key factors that determine the sealing performance, which is not disclosed in the above technical solution. Utility Model Content

[0008] In order to improve the durability and sealing performance of a discharging mechanism of a concrete mixing tank, the present application provides a discharging mechanism of a concrete mixing tank.

[0009] The discharging mechanism of a concrete mixing tank provided in the present application adopts the following technical solution:

[0010] A discharging mechanism of a concrete mixing tank comprises a moving assembly and a sealing assembly, wherein the moving assembly is connected to the sealing assembly so that the moving assembly drives the sealing assembly to move, the sealing assembly comprises a tank door and a sealing ring, the sealing ring is connected to the tank door, and a chamfer is provided on the sealing ring so that the chamfer is parallel to a rim at a tank body discharging port, and the sealing ring has a length so that it remains parallel to the rim at the tank body discharging port after being worn, thereby enabling stable sealing after the sealing assembly is moved by the moving assembly.

[0011] By adopting the above technical solution, the moving component drives the sealing component to move, and then drives the tank door and the sealing ring to move, so that the chamfer of the sealing ring fits with the rim to achieve the sealing of the tank body discharge port. When the sealing ring is worn, since the sealing ring has a certain length and the angle of the chamfer is consistent with the angle of the rim, even if the chamfer is worn during use, its sealing performance is not affected. As long as the sealing ring is moved toward the tank body discharge port by rotating the rotating rod, the sealing ring will also fit tightly against the rim to achieve sealing of the concrete in the tank body, and then its durability is improved by the material and structural shape of the sealing ring, and the requirement for precision is relatively broad.

[0012] Preferably, the sealing ring is made of polyurethane.

[0013] By adopting the above technical solution, the Shore hardness value of the polyurethane is within the range of 64-72 degrees, and the Shore hardness can reduce the elastic deformation of the sealing ring and increase its hardness.

[0014] Preferably, the movable assembly includes a support frame, a screw shaft, a nut sleeve and a bearing seat. One end of the screw shaft is connected to the support frame, and the other end is connected to the nut sleeve. A rotating rod is provided on the nut sleeve, so that the user rotates the rotating rod to adjust the relative position of the nut sleeve on the screw shaft. The bearing seat is arranged between the nut sleeve and the screw shaft, and the bearing seat is used to limit the sealing assembly.

[0015] By adopting the above technical solution, the rotating rod is rotated to make the light hole end in the nut sleeve rotate and move on the screw shaft, thereby driving the bearing seat, the tank door, and the sealing ring to rotate and move, and finally making the chamfer of the sealing ring fit with the wheel rim to achieve the sealing of the tank body discharge port.

[0016] Preferably, the bearing seat includes a shell and an end cover, the shell is sleeved on the surface of the screw shaft and the nut sleeve, the end cover is arranged on an end of the shell far from the screw shaft, and a bearing is arranged in the shell and between the end cover.

[0017] By adopting the above technical solution, the rotating rod is rotated to make the light hole end in the nut sleeve rotate and move on the screw shaft. During the rotation of the nut sleeve, the bearing seat, tank door and sealing ring are driven to rotate and move through the rotation of the bearing.

[0018] Preferably, the shell is provided with a groove, and a filler is provided in the groove, and the filler is used to seal the screw shaft and the bearing seat to prevent the granular slurry in the tank body from entering the bearing seat.

[0019] By adopting the above technical solution, the filler is used to seal the screw shaft and the bearing seat to prevent the granular mud in the tank body from entering the bearing seat.

[0020] Preferably, skeleton oil seals are provided at both ends of the bearing inside the housing, and the skeleton oil seals are used to prevent mud in the tank body and rainwater from the outside from entering the bearing seat.

[0021] By adopting the above technical solution, mud in the tank body and rainwater from the outside are prevented from entering the bearing seat.

[0022] Preferably, the bearing is a self-aligning ball bearing.

[0023] By adopting the above technical solution, the eccentricity of the tank body and the flexural deformation of the screw shaft are compensated by the self-aligning ball bearing, and then the chamfer on the sealing ring always maintains sealing performance with the rim of the tank body through the self-aligning ball bearing.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The moving assembly drives the sealing assembly to move, and then drives the tank door and the sealing ring to move, so that the chamfer of the sealing ring fits with the rim to achieve the sealing of the tank body outlet. When the sealing ring is worn, since the sealing ring has a certain length and the angle of the chamfer is consistent with the angle of the rim, even if the chamfer is worn during use, it does not affect its sealing performance. As long as the sealing ring is moved into the tank body outlet by rotating the rotating rod, the sealing ring will also fit tightly on the rim to achieve sealing of the concrete in the tank body, and then the material and structural shape of the sealing ring will improve its durability;

[0026] 2. The Shore hardness of polyurethane is in the range of 64-72 degrees, which can reduce the elastic deformation of the sealing ring and increase its hardness;

[0027] 3. By rotating the rotating rod, the light hole end in the nut sleeve rotates and moves on the screw shaft. During the rotation of the nut sleeve, the rotation of the bearing drives the bearing seat, tank door and sealing ring to rotate and move. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front view of the discharging mechanism in this embodiment;

[0029] Figure 2 In this embodiment Figure 1 A partial enlarged schematic diagram of .

[0030] Figure numerals: 1. moving assembly; 2. sealing assembly; 3. tank door; 4. sealing ring; 5. chamfer; 6. support frame; 7. screw shaft; 8. nut sleeve; 9. bearing seat; 10. rotating rod; 11. housing; 12. end cover; 13. bearing; 14. groove; 15. filler; 16. skeleton oil seal; 17. pressure plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-2 This application is described in further detail.

[0032] The embodiment of the present application discloses a discharging mechanism of a concrete mixing tank.

[0033] Reference Figure 1 and Figure 2 , including a moving assembly 1 and a sealing assembly 2, wherein the moving assembly 1 drives the sealing assembly 2 to move. The moving assembly 1 includes a support frame 6, a screw shaft 7, a nut sleeve 8 and a bearing seat 9, wherein one end of the screw shaft 7 is bolted to the middle of the support frame 6, and the other end is threadedly sleeved in the nut sleeve 8, and the nut sleeve 8 is welded to a rotating rod 10, so that the user can adjust the connection position of the nut sleeve 8 and the screw shaft 7 by rotating the rotating rod 10, and the bearing seat 9 is sleeved on the surface of the nut sleeve 8.

[0034] The bearing seat 9 includes a shell 11 and an end cover 12. The shell 11 is sleeved at the connection between the screw shaft 7 and the nut sleeve 8. The end cover 12 is bolted to the end of the screw shaft 7 away from the screw shaft 7, and the end cover 12 is partially located inside the shell 11. The nut sleeve 8 is sleeved with a bearing 13 between the end cover 12 and the shell 11, and the bearing 13 is bolted to the shell 11. The shell 11 is bolted to the tank door 3. A pressure plate 17 is arranged inside the tank door 3. A sealing ring 4 is bolted to the pressure plate 17, so that one end of the sealing ring 4 is in contact with the tank door 3 and the other end is through The pressing plate 17, bolts and nuts are fixed on the tank door 3. The pressing plate 17 improves the connection stability of the sealing ring 4, so that when the chamfer 5 fits with the rim, its shape does not deform. The sealing ring 4 is made of polyurethane, and its designed Shore hardness value is within the range of 64-72 degrees. The Shore hardness can reduce the elastic deformation of the sealing ring 4 and improve its hardness. The chamfer 5 is set on the outer contour of the sealing ring 4, and the angle of the chamfer 5 is parallel to the rim at the tank discharge port. When the user wants to close the tank door 3, the rotating rod 10 is rotated, and the light in the nut sleeve 8 is The hole end rotates and moves on the screw shaft 7. During the rotation and movement of the nut sleeve 8, the bearing seat 9, the tank door 3, and the sealing ring 4 are driven to rotate and move through the rotation of the bearing 13, and finally the chamfer 5 of the sealing ring 4 is fitted with the rim to achieve the sealing of the tank body discharge port. Since the chamfer 5 of the sealing ring 4 has a certain length and the angle of the chamfer 5 is consistent with the angle of the rim, even if the chamfer 5 is worn during use, it will not affect its sealing performance. As long as the sealing ring 4 is moved into the tank body discharge port by rotating the rotating rod 10, the sealing ring 4 can be easily sealed. When the tank body is moved, the sealing ring 4 will also fit tightly on the rim to seal the concrete in the tank body, thereby improving its durability through the material and structural shape of the sealing ring 4, and reducing the manufacturing accuracy of the rim through the chamfer 5 set on the sealing ring 4. Similarly, the conical surface sealing is achieved at the rim of the tank body through the chamfer 5 on the sealing ring 4. Since the sealing ring 4 has a certain elasticity and the chamfer 5 has a certain length, when the rim and the sealing ring 4 are in contact, the manufacturing error of the rim can be eliminated through the sealing ring 4, thereby reducing the manufacturing accuracy of the rim.

[0035] A skeleton oil seal 16 is also placed in the bearing seat 9, and the skeleton oil seal 16 is arranged on the front and rear sides of the bearing 13 respectively to prevent the mud in the tank body and the rainwater from the outside from entering the bearing seat 9. A groove 14 is provided at the rear end of the bearing seat 9, and a filler 15 such as graphite packing or felt is provided in the groove 14 to seal between the screw shaft 7 and the bearing seat 9 to prevent the particles in the tank body from entering the bearing seat 9. At the same time, the mud can also be blocked outside the bearing seat 9.

[0036] Furthermore, in this embodiment, the shaft extension of the bearing seat 9 may be a conical surface, which prevents the concrete in the tank from remaining on the bearing seat 9.

[0037] Furthermore, in this embodiment, the front end of the screw shaft 7 can also be threadedly connected with a baffle. By limiting the baffle at the front end of the screw shaft 7, when the tank door 3 is opened, the baffle can prevent the nut sleeve 8 from falling off the screw shaft 7.

[0038] Furthermore, in this embodiment, the bearing 13 is a self-aligning ball bearing 13, which is used to compensate for the eccentricity of the tank body and the flexural deformation of the screw shaft 7, and then the chamfer 5 on the sealing ring 47 always maintains sealing performance with the rim of the tank body through the self-aligning ball bearing 13.

[0039] The implementation principle of a discharging mechanism of a concrete mixing tank disclosed in an embodiment of the present application is as follows: the chamfer 5 of the sealing ring 4 is parallel to the wheel rim, so that the sealing ring 4 fits tightly against the wheel rim, and through a certain length of the sealing ring 4 and the chamfer 5 of the sealing ring 4 being parallel to the wheel rim, the sealing assembly 2 is driven by the moving assembly 1 to achieve durable use of the sealing ring 4, and the manufacturing accuracy of the wheel rim can be reduced by setting the chamfer 5 on the sealing ring 4.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A discharging mechanism for a concrete mixing tank, characterized in that: The invention comprises a moving component (1) and a sealing component (2), wherein the moving component (1) is connected to the sealing component (2) so that the moving component (1) drives the sealing component (2) to move, and the sealing component (2) comprises a tank door (3) and a sealing ring (4), wherein the sealing ring (4) is connected to the tank door (3), and a chamfer (5) is provided on the sealing ring (4) so ​​that the chamfer (5) is parallel to the wheel rim at the tank body discharge port, and the sealing ring (4) has a length so that it is still parallel to the wheel rim at the tank body discharge port after being worn, so that after the sealing component (2) is moved by the moving component (1), a stable seal can still be achieved.

2. The discharging mechanism according to claim 1, characterized in that: The sealing ring (4) is made of polyurethane.

3. The discharging mechanism according to claim 1, characterized in that: The moving assembly (1) comprises a support frame (6), a screw shaft (7), a nut sleeve (8) and a bearing seat (9); one end of the screw shaft (7) is connected to the support frame (6), and the other end is connected to the nut sleeve (8); a rotating rod (10) is provided on the nut sleeve (8), so that a user can rotate the rotating rod (10) to adjust the relative position of the nut sleeve (8) on the screw shaft (7); the bearing seat (9) is arranged between the nut sleeve (8) and the screw shaft (7); and the bearing seat (9) is used to limit the sealing assembly (2).

4. The discharging mechanism according to claim 3, characterized in that: The bearing seat (9) comprises a shell (11) and an end cover (12); the shell (11) is sleeved on the surfaces of the screw shaft (7) and the nut sleeve (8); the end cover (12) is arranged at one end of the shell (11) away from the screw shaft (7); a bearing (13) is arranged in the shell (11); and the bearing (13) is located between the shell (11) and the end cover (12).

5. The discharging mechanism according to claim 4, characterized in that: The housing (11) is provided with a groove (14), and a filler (15) is provided in the groove (14). The filler (15) is used to seal the screw shaft (7) and the bearing seat (9) to prevent the granular slurry in the tank from entering the bearing seat (9).

6. The discharging mechanism according to claim 4, characterized in that: The housing (11) is provided with skeleton oil seals (16) at both ends of the bearing (13), and the skeleton oil seals (16) are used to prevent mud in the tank body and rainwater from the outside from entering the bearing seat (9).

7. The discharging mechanism according to claim 4, characterized in that: The bearing (13) is a self-aligning ball bearing (13).

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