A concrete mixer

Abstract

This utility model relates to the field of mixing technology, specifically to a concrete mixer, including a casing having a first direction and a second direction that are transverse and perpendicular to each other. Two mixing shafts with axial directions parallel to the first direction are arranged side-by-side inside the casing. The casing includes a lower casing and a top cover. The upper end of the lower casing has an opening, which is sealed by the top cover. The outer contour of the top cover is trapezoidal, and the top cover includes two inclined plates respectively located on both sides of the casing along the second direction. Each inclined plate has an operating port extending through its thickness. A transparent plate and a cover plate are installed inside the operating port, with the transparent plate located on the side of the cover plate closest to the inner cavity of the casing. The upper end of the cover plate is rotatably connected to the upper part of the inclined plate, and a locking device is provided between the lower end of the cover plate and the inclined plate. The lower end of the transparent plate is rotatably connected to the lower part of the inclined plate, and the upper end of the transparent plate is magnetically attracted to the inclined plate. A proximity switch is installed between the upper part of the inclined plate and the transparent plate, and the proximity switch is connected to the controller assembly of the concrete mixer.

Description

Technical Field

[0001] This utility model relates to the field of mixing technology, and in particular to a concrete mixer. Background Technology

[0002] A twin-shaft concrete mixer combines concrete materials with water to achieve forced mixing. In related technical solutions, the concrete mixer includes a lower shell and an upper cover mounted on the main body, with the lower shell and upper cover forming the internal space of the entire concrete mixer. The twin shafts are located within the lower shell.

[0003] In the relevant technical solution, a maintenance port extending through the top cover is provided, and this maintenance port is equipped with a cover plate and a lock. Operators can open the cover plate to observe the internal conditions through the maintenance port, or enter the mixer through the maintenance port for maintenance.

[0004] However, in the above technical solution, when the inspection port is opened for observation, the inner cavity of the concrete mixer is connected to the external environment. Consequently, some concrete dust that has not been fully mixed with water is prone to overflow from the inspection port, causing environmental pollution.

[0005] In addition, when it is necessary to enter the concrete mixer through the maintenance port for maintenance, although the power supply of the whole machine can be disconnected and warning signs can be used to warn others, there is still a possibility that other users may accidentally turn on the machine, causing injury to the maintenance personnel inside the concrete mixer. Utility Model Content

[0006] This invention provides a concrete mixer that can solve at least one of the above-mentioned technical problems.

[0007] To solve the above-mentioned technical problems, one or more embodiments of this utility model provide a concrete mixer, including a casing having a first direction and a second direction that are transverse and perpendicular to each other. Two mixing shafts with axial directions parallel to the first direction are arranged side-by-side inside the casing. The casing includes a lower casing and a top cover. The upper end of the lower casing has an opening, which is sealed by the top cover. The outer contour of the top cover is trapezoidal, and the top cover includes two inclined plates respectively located on both sides of the casing along the second direction. Each inclined plate has an operating opening extending through its thickness. A transparent plate and a cover plate are installed inside the operating opening, with the transparent plate located on the side of the cover plate closest to the inner cavity of the casing. The upper end of the cover plate is rotatably connected to the upper part of the inclined plate, and a lock is provided between the lower end of the cover plate and the inclined plate. The lower end of the transparent plate is rotatably connected to the lower part of the inclined plate, and the upper end of the transparent plate is magnetically attracted to the inclined plate.

[0008] A proximity switch is installed between the upper part of the inclined plate and the transparent plate. This proximity switch is connected to the controller assembly of the concrete mixer, which controls the start and stop of the concrete mixer. The beneficial effects of one or more of the above technical solutions are:

[0009] Firstly, in this design, a cover plate and a transparent plate are simultaneously installed at the operating port. The cover plate mainly provides strong protection, while the transparent plate isolates flying dust. When the operator opens the cover plate, they can observe the internal condition of the stirring mechanism through the transparent plate, which also prevents the internal flying dust from overflowing.

[0010] Additionally, a proximity switch is installed between the transparent panel and the inclined plate, and this proximity switch is connected to the concrete mixer's controller assembly. This configuration requires the mixer's controller assembly to first detect the proximity switch signal before starting the mixer. When the proximity switch signal indicates that the transparent panel is open, the controller assembly will not start the mixer, thus preventing the concrete mixer from being accidentally started. Attached image description:

[0011] Figure 1 This is an isometric view of the overall structure in an embodiment of this utility model;

[0012] Figure 2 This is an axial side view of the top cover in an embodiment of the present invention;

[0013] Figure 3 This is a side sectional view of the top cover in an embodiment of the present invention;

[0014] Figure 4 for Figure 3 A partial sectional view of the structure, including a single inclined plate and a hydraulic spring.

[0015] Figure 5 This is a schematic diagram showing the cover plate and transparent plate being opened respectively in an embodiment of this utility model.

[0016] In the diagram, 1. Drive motor; 2. Lower shell; 3. Top cover; 301. Top plate; 302. End plate; 303. Inclined plate; 4. Connecting plate; 5. Lock; 6. Handle; 7. Lower mounting bracket; 8. Hydraulic spring; 9. Upper mounting bracket; 10. Rotating seat; 11. Cover plate; 12. Operating port; 13. Transparent plate. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0018] See Figures 1-5This embodiment provides a concrete mixer, including a casing having a first direction and a second direction that are transverse and perpendicular to each other. Two mixing shafts with axial directions parallel to the first direction are arranged side-by-side inside the casing. The casing includes a lower casing 2 and a top cover 3. The upper end of the lower casing 2 has an opening, which is sealed by the top cover 3. The outer contour of the top cover 3 is trapezoidal. The top cover 3 includes two inclined plates 303 respectively located on both sides of the casing along the second direction. Each inclined plate 303 has an operating opening 12 extending through its thickness. A transparent plate 13 and a cover plate 11 are installed within the operating opening 12. The transparent plate 13 is located on the side of the cover plate 11 closest to the inner cavity of the casing. The upper end of the cover plate 11 is rotatably connected to the upper part of the inclined plate 303, and a lock 5 and a handle 6 are provided between the lower end of the cover plate 11 and the inclined plate 303. The lower end of the transparent plate 13 is rotatably connected to the lower part of the inclined plate 303, and the upper end of the transparent plate 13 is magnetically attracted to the inclined plate 303.

[0019] Specifically, the top of the inclined plate 303 is provided with a rotating seat 10, which is rotatably connected to the connecting plate 4. The connecting plate 4 is fixedly connected to the outer side of the cover plate 11. Specifically, the top cover 3 includes a top plate 301, two end plates 302, and two inclined plates 303. The top plate 301 is horizontally arranged and includes two mutually separated half plates. Here, the end plates 302 are perpendicular to the first direction, and the inclined plates 303 are parallel to the first direction. The two inclined plates 303 are symmetrically arranged on both sides of the top cover 3 along the second direction.

[0020] Specifically, a first stirring shaft and a second stirring shaft are arranged inside the lower shell 2. The axes of both stirring shafts are parallel to the first direction. The shaft sections of the two stirring shafts extend out of the lower shell 2 and are connected to the drive assembly consisting of the drive motor 1 and the reducer. Specifically, a first electromagnet is fixedly installed on the transparent plate 13, and a second electromagnet is fixedly installed on the inclined plate 303. The attraction between the first electromagnet and the second electromagnet can block the transparent plate 13 at the operation port 12.

[0021] A proximity switch (not shown in the figure) is installed between the upper part of the inclined plate 303 and the transparent plate 13. The proximity switch is connected to the controller assembly of the concrete mixer, which is used to control the start and stop of the concrete mixer.

[0022] Specifically, the proximity switch here can be a Hall effect proximity switch or a capacitive proximity switch. When the proximity switch components are respectively installed on the upper part of the inclined plate 303 and the end of the transparent plate 13 furthest from its own rotation axis, when the transparent plate 13 blocks the operating port 12, the proximity switch between the upper part of the inclined plate 303 and the transparent plate 13 detects the blocking signal and sends it to the controller assembly. Conversely, when the transparent plate 13 rotates downwards without blocking the operating port 12, the proximity switch sends a signal to the controller assembly that the transparent plate 13 is open, and the controller assembly can then determine whether the mixer can be driven based on this information.

[0023] More specifically, one part of the proximity switch is fixed to the end of the transparent plate 13 away from its own rotation direction, and the other part of the proximity switch is fixed to the upper part of the inclined plate 303 and above the operation port 12.

[0024] It should be noted that the specific structure and working principle of the proximity switch are existing technologies and will not be elaborated here.

[0025] In this embodiment, the transparent plate 13 includes a square frame, and a transparent plastic plate is embedded in the frame.

[0026] Specifically, the square frame here is formed by splicing four rods, each with a 45-degree bevel at both ends. Adjacent rods are joined together using the beveled edges, and their extension directions are perpendicular. Insertion slots for the aforementioned transparent plastic sheet are provided on the inside of the rods.

[0027] In this embodiment, the first magnet is embedded in the frame, and the second magnet is embedded in the inclined plate 303.

[0028] In this embodiment, the cover plate 11 is a rigid plate, and a driving member is provided between the cover plate 11 and the inclined plate 303. The driving member is used to drive the cover plate 11 to open so as to expose the transparent plate 13.

[0029] In this embodiment, the driving component is a hydraulic spring 8. One end of the hydraulic spring 8 is hinged to the upper part of the cover plate 11, and the other end is hinged to the outer wall of the inclined plate 303.

[0030] Specifically, the lower part of the inclined plate 303 is fixed with a lower mounting support 7, and the upper part of the cover plate 11 is fixed with an upper mounting support 9. The upper and lower ends of the hydraulic spring 8 are rotatably connected to the lower mounting support 7 and the upper mounting support 9, respectively.

[0031] In other embodiments, the driving component may be an electric push rod, a pneumatic push rod, or a metal compression spring, etc., which can be designed by those skilled in the art and will not be described in detail here.

[0032] In this embodiment, the transparent plate 13 is attached to the inner wall of the inclined plate 303, and the cover plate 11 is attached to the outer wall of the inclined plate 303. A gap space is formed between the transparent plate 13 and the cover plate 11 to arrange the battery of the proximity switch and the wireless signal transmitter. The wireless signal transmitter is connected to the proximity switch signal and is used to transmit signals to the controller.

[0033] In this embodiment, a first sealing gasket is installed between the inner walls of the transparent plate 13 and the inclined plate 303, and a second sealing gasket is installed between the cover plate 11 and the outer wall of the inclined plate 303.

[0034] Specifically, the first and second sealing gaskets here have a U-shaped structure.

[0035] Working principle: When using this device, under normal mixing conditions, concrete material is fed into the inner cavity through the feed port on the top cover 3, and the two horizontal mixing shafts forcefully mix the concrete material and the added water.

[0036] When it is necessary to observe the mixing situation inside the mixer, release the lock 5, and the hydraulic spring 8 will cause the entire cover 11 to open upwards, allowing the user to observe the internal situation through the transparent plate 13.

[0037] When the internal structure of the concrete mixer needs to be inspected, the transparent plate 13 is pushed, disengaging the magnet between the transparent plate 13 and the upper part of the inclined plate 303. The transparent plate 13 then rotates downwards to fully expose the operating port 12. At this time, the proximity switch between the upper part of the inclined plate 303 and the transparent plate 13 receives a signal that the transparent plate 13 has been opened and transmits this signal to the controller assembly. The controller assembly will not pneumatically operate the mixer until the transparent plate 13 is closed again.

[0038] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0039] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A concrete mixer, comprising a casing having a first direction and a second direction that are transverse and perpendicular to each other, wherein two mixing shafts with axial directions parallel to the first direction are arranged side by side within the casing, characterized in that, The housing includes a lower shell and a top cover. The upper end of the lower shell has an opening, and the top cover seals the opening. The outer contour of the top cover is trapezoidal, and the top cover includes two inclined plates respectively disposed on both sides of the housing along the second direction. The inclined plate is provided with an operating port that extends through itself along the thickness direction. A transparent plate and a cover plate are installed in the operating port. The transparent plate is located on the side of the cover plate closer to the inner cavity of the housing. The upper end of the cover plate is rotatably connected to the upper part of the inclined plate, and a lock is provided between the lower end of the cover plate and the inclined plate. The lower end of the transparent plate is rotatably connected to the lower part of the inclined plate, and the upper end of the transparent plate is magnetically attracted to the inclined plate. A proximity switch is installed between the upper part of the inclined plate and the transparent plate. The proximity switch is connected to the controller assembly of the concrete mixer, which is used to control the start and stop of the concrete mixer.

2. The concrete mixer according to claim 1, characterized in that, The transparent panel includes a square frame, within which a transparent plastic panel is embedded.

3. The concrete mixer according to claim 2, characterized in that, The frame is embedded with a first magnet, and the inclined plate is equipped with a second magnet.

4. The concrete mixer according to claim 1, characterized in that, The cover plate is a rigid plate, and a driving component is provided between the cover plate and the inclined plate. The driving component is used to drive the cover plate to open so as to expose the transparent plate.

5. The concrete mixer according to claim 4, characterized in that, The driving component is a hydraulic spring, one end of which is hinged to the upper part of the cover plate, and the other end is hinged to the outer wall of the inclined plate.

6. The concrete mixer according to claim 1, characterized in that, The transparent plate is attached to the inner wall of the inclined plate, and the cover plate is attached to the outer wall of the inclined plate. A gap space is formed between the transparent plate and the cover plate to accommodate the battery of the proximity switch and the wireless signal transmitter. The wireless signal transmitter is connected to the proximity switch signal and is used to transmit signals to the controller.

7. The concrete mixer according to claim 6, characterized in that, A first sealing gasket is installed between the inner walls of the transparent plate and the inclined plate, and a second sealing gasket is installed between the cover plate and the outer wall of the inclined plate.

8. The concrete mixer according to claim 7, characterized in that, The first and second sealing gaskets have a U-shaped structure.

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