Double-shaft concrete mixer bearing seat sealing structure

Abstract

The utility model discloses a double horizontal shaft concrete mixer bearing seat sealing structure, including the bearing seat of installation in the mixer bin right side front end and rear end: the inner chamber of bearing seat is installed with bearing, the inner chamber side of bearing seat is provided with rotatable stirring axle stem through, the left side of stirring axle stem surface is provided with anti -infiltration subassembly, the anti -infiltration subassembly includes the conical pressure cover of setting in stirring axle stem surface, the inner chamber of conical pressure cover is provided with the conical bushing of setting in stirring axle stem surface. The utility model discloses through the setting of anti -infiltration subassembly, carries out the sealing treatment to the connecting position of mixer bin inboard and stirring axle stem, effectively prevents the material in the mixer bin inner chamber from appearing the leakage from both connecting positions, and simultaneously under the cooperation of bearing seat and shaft seal, carries out the sealing protection to the bearing in the inner chamber of bearing seat, can reach the purpose of effectively preventing liquid, dust leakage and guaranteeing bearing and stirring axle stem stable operation.

Description

Technical Field

[0001] This utility model belongs to the field of concrete mixing technology, and in particular relates to the sealing structure of the bearing seat of a twin-shaft concrete mixer. Background Technology

[0002] Twin-shaft concrete mixers are widely used for forced mixing of materials such as concrete and mortar. The sealing performance of their bearing housings directly affects the equipment's lifespan and operational safety. However, the greatest threat to the bearing housings from water and dust comes from the materials inside the hopper. Relying on the outer sealing of the shaft seal without protecting the inner gaps (where the mixer hopper connects to the shaft) allows dust to intrude through the shoulder gaps. Therefore, a sealing structure for the bearing housings of twin-shaft concrete mixers is needed. This structure employs a conical labyrinth seal, combined with a multi-layered sealing design for both the inner and outer hoppers, to prevent leakage at the bearing and hopper locations. It is suitable for high-dust, high-humidity, and high-vibration environments, providing key technical support for the long-term stable operation of the mixing equipment. Utility Model Content

[0003] The purpose of this invention is to provide a bearing housing sealing structure for a twin-shaft concrete mixer. It adopts a conical labyrinth seal method and a sealing design with multiple internal and external sealing structures for the hopper to prevent leakage at the bearing and hopper locations. It is suitable for high dust, high humidity and high vibration environments, and provides key technical support for the long-term stable operation of mixing equipment, thereby solving the above-mentioned technical problems.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a bearing housing sealing structure for a twin-shaft concrete mixer, including bearing housings installed at the front and rear ends of the right side of the mixer chamber; a bearing is installed in the inner cavity of the bearing housing; a rotatable mixing shaft is provided through the inner cavity of the bearing housing; an anti-seepage component is provided on the left side of the surface of the mixing shaft; the anti-seepage component includes a conical pressure sleeve fitted on the surface of the mixing shaft; a conical bushing fitted on the surface of the mixing shaft is provided in the inner cavity of the conical pressure sleeve; a water-stop strip is provided on the left side of the surface of the conical bushing; the right side of the water-stop strip is tightly fitted to the left side of the conical pressure sleeve; a shaft seal fitted on the surface of the mixing shaft is threaded to the right side of the bearing housing; a rubber gasket is provided on the left side of the shaft seal; and the rubber gasket is pressed against the right side of the bearing housing.

[0005] Preferably, a sealing plate is engaged on the left side of the tapered pressure sleeve, and four annularly distributed screws are provided through the left side of the sealing plate. The right end of each screw extends through to the right side of the sealing plate and is threadedly connected to the tapered pressure sleeve.

[0006] Preferably, four annularly distributed bolts are provided through the left side of the conical pressure sleeve, and the right end of the bolts extends through to the right side of the conical pressure sleeve and is threadedly connected to the mixer chamber.

[0007] Preferably, a rubber ring is fitted on the right side of the surface of the stirring shaft, and the rubber ring is attached to the right side of the mixer chamber.

[0008] Preferably, the bearing housing has a positioning plate inside, which is sleeved on the surface of the stirring shaft and pressed against the right side of the rubber ring.

[0009] Preferably, the inner ring of the bearing is fixedly connected to the surface of the stirring shaft, and the outer ring of the bearing is fixedly connected to the inner wall of the bearing seat.

[0010] The beneficial effects of this utility model are:

[0011] 1. This utility model seals the connection between the inner side of the mixer chamber and the mixing shaft by setting the anti-seepage component, effectively preventing the material in the inner cavity of the mixer chamber from leaking out from the connection between the two. At the same time, with the cooperation of the bearing seat and shaft seal, the bearing located in the inner cavity of the bearing seat is sealed and protected, thus achieving the purpose of effectively preventing liquid and dust leakage and ensuring the stable operation of the bearing and the mixing shaft.

[0012] 2. This utility model uses the combination of sealing plate and screws to compress and fix the waterstop, so that the waterstop can be tightly pressed against the left side of the conical pressure sleeve, thereby sealing the joint between the conical pressure sleeve and the conical bushing, thus improving the sealing strength of the conical pressure sleeve and the conical bushing to the stirring shaft.

[0013] 3. This utility model uses a combination of rubber rings and positioning pressure plates to seal the connection between the mixing shaft and the outside of the mixer chamber, thereby preventing leakage and dust from entering the connection between the mixer chamber and the outside of the mixing shaft. Attached Figure Description

[0014] in:

[0015] Figure 1 This is a top cross-sectional view of one embodiment of the present invention;

[0016] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0017] Figure 3 This is a three-dimensional schematic diagram of a bearing housing, a stirring shaft, and a shaft seal according to an embodiment of the present invention;

[0018] Figure 4 This is a three-dimensional exploded view of a bearing housing, positioning pressure plate, and anti-seepage component according to an embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Mixer chamber; 2. Bearing housing; 3. Bearing; 4. Mixing shaft; 5. Anti-seepage component; 51. Conical pressure sleeve; 52. Conical bushing; 53. Waterstop; 54. Sealing plate; 55. Bolt; 56. Screw; 6. Rubber ring; 7. Positioning pressure plate; 8. Shaft seal; 9. Rubber pad. Detailed Implementation

[0021] In the following description, embodiments of the bearing housing sealing structure of the twin-shaft concrete mixer of this invention will be described with reference to the accompanying drawings.

[0022] Figure 1-4 This invention illustrates a sealing structure for a bearing seat of a twin-shaft concrete mixer according to an embodiment of the present invention. The structure includes bearing seats 2 installed at the front and rear right sides of the mixer chamber 1. A bearing 3 is installed within the inner cavity of the bearing seat 2. The inner ring of the bearing 3 is fixedly connected to the surface of the mixing shaft 4, and the outer ring of the bearing 3 is fixedly connected to the inner wall of the bearing seat 2. A rotatable mixing shaft 4 is provided through the inner cavity of the bearing seat 2. A rubber ring 6 is fitted onto the right side of the surface of the mixing shaft 4, and the rubber ring 6 fits against the right side of the mixer chamber 1. A positioning mechanism is provided within the inner cavity of the bearing seat 2. The pressure plate 7, or positioning pressure plate 7, is fitted onto the surface of the stirring shaft 4 and pressed against the right side of the rubber ring 6. Through the cooperation of the rubber ring 6 and the positioning pressure plate 7, the connection between the stirring shaft 4 and the outside of the mixer chamber 1 is sealed, preventing leakage and dust from entering the connection point. A seepage prevention component 5 is provided on the left side of the stirring shaft 4 surface. The seepage prevention component 5 includes a conical pressure sleeve 51 fitted onto the surface of the stirring shaft 4. The inner cavity of the conical pressure sleeve 51 is fitted onto the stirring shaft 4... The tapered bushing 52 has a waterstop 53 on its left side. The right side of the waterstop 53 is tightly fitted to the left side of the tapered pressure sleeve 51. A sealing plate 54 is engaged on the left side of the tapered pressure sleeve 51. Four annularly distributed screws 56 are inserted through the left side of the sealing plate 54. The right end of each screw 56 extends to the right side of the sealing plate 54 and is threaded into the tapered pressure sleeve 51. Four annularly distributed bolts 55 are inserted through the left side of the tapered pressure sleeve 51. The right end of each bolt 55 extends to the right side of the tapered pressure sleeve 51 and is threaded into the mixer chamber. 1. The threaded connection, through the cooperation of the sealing plate 54 and the screw 56, plays a role in squeezing and fixing the waterstop 53, so that the waterstop 53 can be tightly pressed onto the left side of the conical pressure sleeve 51, thereby sealing the joint between the conical pressure sleeve 51 and the conical bushing 52, thus improving the sealing strength of the conical pressure sleeve 51 and the conical bushing 52 to the stirring shaft 4. The right side of the bearing seat 2 is threadedly connected to a shaft seal 8 that is sleeved on the surface of the stirring shaft 4. A rubber gasket 9 is provided on the left side of the shaft seal 8, and the rubber gasket 9 is pressed onto the right side of the bearing seat 2.

[0023] Working Principle: In use, the user pre-fits the conical bushing 52, conical pressure sleeve 51, and sealing plate 54 onto the top of the surface of the stirring shaft 4. Then, the stirring shaft 4 is inserted from the right side of the inner cavity of the mixer chamber 1 to the outside of the mixer chamber 1. Next, the rubber ring 6, positioning pressure plate 7, bearing seat 2, shaft seal 8, and rubber pad 9 are sequentially fitted onto the surface of the stirring shaft 4, simultaneously clamping the bearing seat 2 onto the outer ring surface of the bearing 3. The right side of the conical bushing 52 is pressed tightly against the inner wall of the mixer chamber 1. The conical pressure sleeve 51 is then fixed with bolts 55, causing the inner wall of the conical pressure sleeve 51 to compress the surface of the conical bushing 52, sealing the connection between the mixer chamber 1 and the inner side of the stirring shaft 4. The sealing plate 54 is then pressed onto the left side of the conical pressure sleeve 51. The rubber ring 6 is then secured with screws 56, which compresses the waterstop 53. The rubber ring 6 is then pressed tightly against the right side of the mixer chamber 1. The bearing seat 2's fixation compresses the positioning plate 7, which in turn exerts pressure on the rubber ring 6, sealing the connection between the mixer chamber 1 and the mixing shaft 4. During use, dust and moisture in the inner cavity of the mixer chamber 1 are first blocked by the sealing plate 54 and the waterstop 53, and then by the conical pressure sleeve 51 and the conical bushing 52, effectively preventing water and dust from seeping to the right. Simultaneously, the sealing protection provided by the rubber ring 6 and the positioning plate 7 effectively prevents any leaking water and dust from reaching the inner cavity of the bearing seat 2, thus avoiding interference with the stable rotation of the connection between the bearing 3 and the mixing shaft 4.

[0024] In summary, the bearing housing sealing structure of this twin-shaft concrete mixer, through the installation of the anti-seepage component 5, seals the connection between the inner side of the mixer chamber 1 and the mixing shaft 4, effectively preventing material leakage from the connection between the two in the inner cavity of the mixer chamber 1. At the same time, with the cooperation of the bearing housing 2 and the shaft seal 8, the bearing 3 located in the inner cavity of the bearing housing 2 is sealed and protected, thus effectively preventing liquid and dust leakage and ensuring the stable operation of the bearing 3 and the mixing shaft 4.

Claims

1. A sealing structure for the bearing housing of a twin-shaft concrete mixer, characterized in that, The bearing housing (2) is installed at the front and rear ends of the right side of the mixer chamber (1). The bearing housing (2) has a bearing (3) installed in its inner cavity. A rotatable stirring shaft (4) is provided through the inner cavity of the bearing housing (2). An anti-seepage component (5) is provided on the left side of the surface of the stirring shaft (4). The anti-seepage component (5) includes a conical pressure sleeve (51) sleeved on the surface of the stirring shaft (4). A conical bushing (52) sleeved on the surface of the stirring shaft (4) is provided in the inner cavity of the conical pressure sleeve (51). A water-stop strip (53) is provided on the left side of the surface of the conical bushing (52). The right side of the water-stop strip (53) is tightly fitted with the left side of the conical pressure sleeve (51). A shaft seal (8) sleeved on the surface of the stirring shaft (4) is threaded to the right side of the bearing housing (2). A rubber pad (9) is provided on the left side of the shaft seal (8). The rubber pad (9) is pressed against the right side of the bearing housing (2).

2. The sealing structure for the bearing seat of a twin-shaft concrete mixer according to claim 1, characterized in that, The left side of the conical sleeve (51) is fitted with a sealing plate (54), and four annularly distributed screws (56) are provided through the left side of the sealing plate (54). The right end of the screws (56) extends through to the right side of the sealing plate (54) and is threadedly connected to the conical sleeve (51).

3. The sealing structure for the bearing seat of a twin-shaft concrete mixer according to claim 2, characterized in that, Four ring-shaped bolts (55) are provided through the left side of the conical sleeve (51), and the right end of the bolts (55) extends through to the right side of the conical sleeve (51) and is threadedly connected to the mixer chamber (1).

4. The sealing structure for the bearing seat of a twin-shaft concrete mixer according to claim 3, characterized in that, A rubber ring (6) is fitted on the right side of the surface of the stirring shaft (4), and the rubber ring (6) is attached to the right side of the mixer chamber (1).

5. The sealing structure for the bearing seat of a twin-shaft concrete mixer according to claim 4, characterized in that, The bearing housing (2) is provided with a positioning plate (7) in its inner cavity. The positioning plate (7) is sleeved on the surface of the stirring shaft (4) and pressed against the right side of the rubber ring (6).

6. The sealing structure for the bearing seat of a twin-shaft concrete mixer according to claim 5, characterized in that, The inner ring of the bearing (3) is fixedly connected to the surface of the stirring shaft (4), and the outer ring of the bearing (3) is fixedly connected to the inner wall of the bearing seat (2).

Images