Crushing and sealing mechanism of mixing machine

Abstract

The utility model discloses a crushing and sealing mechanism of a mixing machine, which relates to the technical field of powder mixing and comprises a driving motor, a driving shaft is arranged at the output end of the driving motor, a crushing hammer is arranged on the driving shaft, a connecting sleeve is mounted at one end of the driving motor at the output end, and a bearing seat is mounted at one end of the connecting sleeve. A sealing sleeve is arranged in the bearing seat, a gas ring is sleeved on the sealing sleeve, a gas channel is horizontally formed in the position, located at the gas ring, of the bearing seat, and the gas channel is connected with an external gas source pipeline; a bearing disc is arranged at one end of the sealing sleeve, and a bearing groove is formed in the circumference of the bearing disc; according to the utility model, the air passage is arranged, so that a switch for introducing air is turned on before the equipment runs, the air is filled in the bearing seat to form a positive-pressure air ring, and dust is prevented from entering the driving motor by matching with the sealing sleeve; and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of powder mixing, in particular to a crushing and sealing mechanism of a mixer. Background Art

[0002] Powder coating is a solid powdered synthetic resin coating composed of solid resin, pigments, fillers and additives. Unlike ordinary solvent-based coatings and water-based coatings, its dispersion medium is air instead of solvent and water. Powder coating needs to be crushed in advance when feeding into the hot melt machine to break the original granular masterbatch into powder.

[0003] The crushing seal design of the mixer often uses a skeleton oil seal as the sealing medium. However, after a period of use, the oil seal will age and wear out, and its function will fail. If it is not replaced in time, the dust in the mixer pot will enter the motor, affecting the service life of the motor.

[0004] For example, the utility model patent with publication number CN 213791811 U and publication date 2021.07.27 discloses a high-efficiency mixing crusher for powder coating production, including a storage box, a fixed block is fixedly installed at the bottom of one side of the storage box, and a support rod is fixedly installed at the bottom of the fixed block, a switch controller is fixedly installed at the bottom of the storage box, a first connecting assembly is fixedly installed at the top of the storage box, a crushing barrel is movably sleeved on the top of the storage box, a barrel cover is fixedly installed on the top of the crushing barrel, and a fixing frame is fixedly installed on the top of the barrel cover, and a drive motor is fixedly installed in the inner cavity of the fixing frame;

[0005] The utility model facilitates better crushing of various coatings inside the crushing cylinder through the mutual cooperation between the driving motor, the connecting rod, the connecting assembly, the rotating rod and the crushing hammer, thereby solving the problem of some uncrushed powder being easily mixed together during the coating processing process, and improving the crushing effect of the coating;

[0006] During the use of this patent, the technical problem described above was exposed: the driving motor lacks the function of preventing dust from entering. When the masterbatch particles in the crushing barrel are crushed by the breaker hammer, the dust generated will enter the driving motor along the connecting rod. At this time, the powder entering the driving motor will affect its normal use and shorten its service life.

[0007] Therefore, there is an urgent need for a crushing sealing mechanism for a mixer to improve the sealing performance of the mixer and prevent dust from entering the motor and affecting its service life.

[0008] The principle of a gas ring seal is to rely on the ring's own elastic force to tightly fit the cylinder's inner wall, forming a sealing surface. Gas pressure is then used to enhance the sealing effect. The gas ring is notched and elastic, and its outer diameter is larger than the cylinder diameter when free. When installed in the cylinder together with the piston, its outer surface rests against the cylinder wall, forming the primary sealing surface. The trapped gas, unable to pass between the ring circumference and the cylinder, enters the gap between the ring and the groove. This presses the ring against the groove end face, forming the secondary sealing surface. Simultaneously, the gas pressure acting on the back of the ring significantly strengthens the sealing effect of the primary sealing surface. Utility Model Content

[0009] In response to the above technical problems, the utility model provides a crushing sealing mechanism for a mixer, which is used to solve the problem that the current driving motor lacks the function of preventing dust from entering. When the masterbatch particles in the crushing barrel are crushed by a breaker hammer, the dust generated will enter the driving motor along the connecting rod. At this time, the powder entering the driving motor will affect its normal use and shorten its service life.

[0010] The above technical objectives of the present invention are achieved through the following technical solutions:

[0011] A crushing and sealing mechanism of a mixer comprises a body, a driving motor, a driving shaft provided at an output end of the driving motor, a crushing hammer provided on the driving shaft, a connecting sleeve provided at one end of the driving motor located at the output end, a bearing provided at one end of the connecting sleeve, the bearing comprising a bearing seat, a sealing sleeve provided in the bearing seat, an air ring provided on the sealing sleeve, an air passage provided in the bearing seat at the level of the air ring, and the air passage connected to an external air source pipeline;

[0012] One end of the sealing sleeve is provided with an outwardly extending receiving plate, one side of the receiving plate is provided with a receiving groove, and the breaker hammer is located on the other side of the receiving plate;

[0013] The bearing seat is provided with a sleeve ring at the position of the receiving groove, and the sleeve ring is inserted into the receiving groove.

[0014] Furthermore, the sealing sleeve is provided with a sleeve on one side of the receiving plate, and the sleeve and the receiving plate form a palace-shaped structure.

[0015] Furthermore, a fixing plate is provided at one end of the bearing seat, and a connecting ring is provided at one end of the connecting sleeve close to the fixing plate, and the connecting ring is bolted to the fixing plate.

[0016] Furthermore, a plurality of air passages are equidistantly provided on the circumference of the bearing seat.

[0017] Furthermore, the bearing seat, the connecting sleeve and the driving motor form a closed chamber, and the breaker hammer is located outside the closed chamber.

[0018] In summary, the beneficial technical effects of the present invention are:

[0019] The air duct is connected to the external air source. When crushing, high-pressure air is filled into the air duct through the external air source and acts on the air ring to form a positive-pressure air ring. At this time, the side wall of the air ring is in close contact with the sealing sleeve and the inner wall of the bearing. Then, the sealing sleeve with a palace-shaped structure cooperates with the bearing seat to block the dust generated by the breaker outside the sealing sleeve, thereby preventing the dust from entering the drive motor, ensuring the normal operation of the drive motor and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a structural diagram of the bearing;

[0022] Figure 3 This is a schematic diagram of the matching between the bearing seat and the sealing sleeve;

[0023] Figure 4 It is a structural diagram of the sealing sleeve.

[0024] Figure numerals: 1. driving motor; 2. driving shaft; 3. breaker; 4. bearing; 5. bearing seat; 6. sealing sleeve; 7. air duct; 8. air ring; 9. fixing plate; 10. connecting ring; 11. set ring; 12. receiving plate; 13. receiving groove; 14. connecting sleeve. DETAILED DESCRIPTION

[0025] The present invention will be described clearly and completely below with reference to the embodiments.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the description of the embodiments, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, connections through an intermediary medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on their specific circumstances.

[0028] See attached Figure 1-4, shown is a crushing and sealing mechanism of a mixer, comprising a drive motor 1, a drive shaft 2 being provided at the output end of the drive motor 1, a crushing hammer 3 being provided at the end of the drive shaft 2 away from the drive motor 1, wherein a connecting sleeve 14 is bolted to one end of the drive motor 1, a fixing plate 9 being provided on the inner wall of one end of the connecting sleeve 14, a bearing 4 being bolted to the inside of the connecting sleeve 14 via the fixing plate 9, and the bearing 4 including a bearing seat 4;

[0029] A connecting ring 10 is provided at one end of the bearing 4 seat close to the fixed plate 9, and the connecting ring 10 is bolted to the fixed plate 9. A sealing sleeve 6 with a palace-shaped structure is set in the bearing 4 seat, and the sealing sleeve 6 is provided with a sleeve. The sleeve is set on the drive shaft 2, and an air ring 8 is set on the outer wall of the sleeve. A plurality of air channels 7 are opened horizontally on the circumference of the bearing 4 seat corresponding to the position of the air ring 8. The air channel 7 is connected to the external air source pipeline. When in use, the external air source fills high-pressure air into the air channel 7 and acts on the air ring 8. At this time, the air ring 8 is tightly attached to the inner wall of the bearing 4 seat and the outer wall of the sleeve under the action of air pressure, filling the gap between the bearing 4 seat and the sleeve to achieve further sealing;

[0030] Furthermore, the sealing sleeve 6 is located at one end of the sleeve and extends outward to provide a receiving plate 12, and a receiving ring is opened on the circumference of the receiving plate 12, and a sleeve ring 11 is provided at the position of the receiving ring corresponding to the receiving ring of the bearing 4 seat. The sleeve ring 11 is inserted into the receiving groove 13, and the sleeve ring 11 is wrapped upward through the receiving groove 13 on the receiving plate 12. When in use, the air ring 8 is inflated through the air channel 7 to form a positive pressure air ring 8, and the sealing sleeve 6 with a palace-shaped structure blocks the dust generated by the breaker 3 outside the sealing sleeve 6, preventing the dust from entering the inside of the drive motor 1, thereby ensuring the normal operation of the drive motor 1 and extending its service life.

[0031] The beneficial effect of the present invention is that when the breaker hammer 3 is placed in the pot body for crushing, the switch on the air channel 7 is turned on, and high-pressure air is filled into the air channel 7 through an external air source and acts on the air ring 8, so that the air ring 8 fills the gap between the bearing 4 seat and the sealing sleeve 6 to achieve sealing, and at the same time cooperates with the sealing sleeve 6 to block the dust generated in the pot body from entering the drive motor 1, thereby extending the service life of the drive motor 1.

[0032] The above description is only a preferred specific embodiment of the present invention and does not limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A crushing and sealing mechanism for a mixer, comprising a drive motor (1), an output end of the drive motor (1) being provided with a drive shaft (2), and a crushing hammer (3) being provided on the drive shaft (2), characterized in that: The driving motor (1) is provided with a connecting sleeve (14) at one end of the output end, a bearing (4) is provided at one end of the connecting sleeve (14), the bearing (4) comprises a bearing (4) seat, a sealing sleeve (6) is provided in the bearing seat, an air ring (8) is sleeved on the sealing sleeve (6), an air passage (7) is provided in the bearing seat at the level of the air ring (8), and the air passage (7) is connected to an external air source pipeline; One end of the sealing sleeve (6) is provided with an outwardly extending receiving plate (12), one side of the receiving plate (12) is provided with a receiving groove (13) on its circumference, and the breaker hammer (3) is located on the other side of the receiving plate (12); The bearing seat is provided with a sleeve ring (11) at the position of the receiving groove (13), and the sleeve ring (11) is inserted into the receiving groove (13).

2. The crushing and sealing mechanism of a mixer according to claim 1, characterized in that: The sealing sleeve (6) is provided with a sleeve on one side of the receiving plate (12), and the sleeve and the receiving plate (12) form a palace-shaped structure.

3. The crushing and sealing mechanism of a mixer according to claim 1, characterized in that: A fixed disk (9) is provided at one end of the bearing seat, and a connecting ring (10) is provided at one end of the connecting sleeve (14) close to the fixed disk (9), and the connecting ring (10) is bolted to the fixed disk (9).

4. The crushing and sealing mechanism of a mixer according to claim 1, characterized in that: A plurality of air passages (7) are equidistantly provided on the circumference of the bearing seat.

5. The crushing and sealing mechanism of a mixer according to claim 1, characterized in that: The bearing seat, the connecting sleeve and the driving motor (1) form a closed chamber, and the breaker hammer (3) is located outside the closed chamber.

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