Bearing fixing device of open mill roller

Abstract

A bearing fixing device of an open mill roller belongs to the field of open mill rollers, and structurally comprises a roller, the roller comprises a horizontally arranged roller body, two ends of the roller body are respectively provided with a fixing mechanism, and the fixing mechanisms are used for positioning rotation of the roller body; the fixing mechanism comprises an assembling shaft with an annular groove, the middle section of the assembling shaft is sleeved with a bearing, a disassembling sleeve is arranged on one side of the bearing, and a clamping ring is arranged on the other side of the bearing. During installation, after the disassembling sleeve is sleeved on the assembling shaft, the second positioning key is firstly installed, then the bearing is sleeved on the assembling shaft, the second positioning groove of the bearing inner ring is tightly embedded with the second positioning key, then the first positioning key is tightly embedded into the first positioning groove of the bearing inner ring through the groove, and finally the clamping ring is sleeved on the groove, so that the bearing is installed and fixed. The operation is simple, and the bearing inner ring is effectively prevented from rotating under high-speed rotation to influence the normal work of the open mill.

Description

Technical Field

[0001] The utility model relates to a bearing fixing device for the rollers of an open mill, belonging to the field of open mill rollers. Background Art

[0002] An open mill, also known as an open rubber mill, is mainly used for the plasticizing, mixing, hot refining, and sheet pressing processes of high molecular materials such as rubber and plastics. It is one of the most basic and important rubber machinery and is widely used in the rubber industry.

[0003] An open mill mainly consists of two parallel rotating rollers, a frame, a transmission system, a heating and cooling system, a distance adjustment device, a safety braking device, etc. During operation, the material is extruded and sheared through the gap between the two relatively rotating rollers, thereby achieving the purpose of plasticizing or mixing. According to the operation requirements, the distance between the two rollers can be adjusted to control the thickness of the processed material, and the temperature of the rollers can be controlled through the heating or cooling system to meet different process requirements.

[0004] With the development of technology, although more advanced equipment such as internal mixers has emerged, the open mill still plays an important role in some small and medium-scale production or specific process requirements due to its simple structure, convenient operation, and easy maintenance.

[0005] The rollers of an open mill are its core working components, usually consisting of two parallel metal drums that can rotate at different speeds and in different directions. The main function of the rollers is to extrude and shear the material, thereby achieving the plasticizing, mixing, hot refining, and sheet pressing processes of materials such as rubber or plastics.

[0006] These rollers are generally made of high-strength alloy steel and are finely processed and surface hardened to ensure that they have sufficient hardness and wear resistance and can withstand high pressure and high friction for a long time without being easily damaged. According to specific application requirements, heating or cooling channels are also designed inside the rollers. By circulating heating media (such as steam, oil) or cooling media (such as water), the working temperature of the rollers can be precisely controlled to adapt to the processing requirements of different materials.

[0007] For the part where the existing open mill rollers are connected to the open mill base, bearing connection and positioning are required. After the bearing is sleeved on the roller, a flange is sleeved on the end of the roller. After the flange is tightened, the bearing is restricted. Under the high-speed rotation of the roller, the connection between the inner ring of the bearing and the roller is likely to rotate, resulting in affecting the normal operation of the open mill. Summary of the Utility Model

[0008] Aiming at the deficiencies of the existing technology, the purpose of the present utility model is to provide a bearing fixing device for the roll of a kneader, so as to solve the problem that in the part where the roll of the existing kneader is connected to the kneader base, bearing is required for connection and positioning. After the bearing is sleeved on the roll, a flange is sleeved on the end of the roll. After the flange is fastened, the bearing is restricted. Under the high-speed rotation of the roll, the connection between the inner ring of the bearing and the roll is likely to rotate, resulting in affecting the normal operation of the kneader.

[0009] To achieve the above purpose, the present utility model is realized through the following technical solutions: A bearing fixing device for the roll of a kneader, the structure of which includes a roll. The roll includes a horizontally arranged roll body. At both ends of the roll body, a fixing mechanism is provided, and this fixing mechanism is used for positioning the rotation of the roll body; The fixing mechanism includes an assembly shaft with an annular groove. A bearing is sleeved in the middle section of the assembly shaft. On one side of the bearing, a disassembly sleeve is provided, and on the other side, a snap ring is provided; On the inner wall of the end of the bearing close to the snap ring, a first positioning groove is provided, and on the inner wall of the end of the bearing close to the disassembly sleeve, a second positioning groove is provided; On the outer wall of the assembly shaft, a groove nested with the snap ring and a positioning key installation groove corresponding to the second positioning groove are provided. A first positioning key is embedded in the inner wall of the groove. The end of the first positioning key away from the assembly shaft is tightly embedded in the first positioning groove. A second positioning key is embedded in the positioning key installation groove. The end of the second positioning key away from the assembly shaft is tightly embedded in the second positioning groove. The first positioning key and the second positioning key respectively limit and position the inner ring of the bearing under the positioning of the groove and the positioning key installation groove, effectively preventing the inner ring of the bearing from rotating.

[0010] Furthermore, for the convenience of assembly, both the first positioning key and the second positioning key are block structures with inclined surfaces at the top, and the inclined surfaces on the first positioning key and the second positioning key are arranged axially opposite to each other.

[0011] Furthermore, to prevent the bearing from moving towards the roll body, one side of the disassembly sleeve abuts against the inner wall of the annular groove of the assembly shaft, and the other side abuts against the bearing and the second positioning key at the same time.

[0012] Furthermore, to prevent the bearing from moving towards the assembly shaft, the side of the snap ring facing the roll body abuts against the bearing and the first positioning key at the same time.

[0013] Furthermore, for the convenience of disassembly, installation and maintenance work, the disassembly sleeve and the assembly shaft are connected in a detachable manner.

[0014] Furthermore, for the convenience of installation, the snap ring is composed of two semi-circular snap strips, and the ends of the two snap strips are fixedly connected.

[0015] Furthermore, to improve the firmness of the connection, the fixed connection is specifically one of bolt fixing and welding.

[0016] Further, in order to improve the stability of rotation, the roller body and the assembly shaft are of an integrated structure.

[0017] The beneficial effects of the present utility model are as follows: During installation, after the sleeve is disassembled and sleeved on the assembly shaft, the second positioning key is first installed, then the bearing is sleeved on the assembly shaft. The second positioning groove on the inner ring of the bearing will be tightly engaged with the second positioning key. Then, the first positioning key is tightly embedded into the first positioning groove on the inner ring of the bearing through the groove. Finally, after the snap ring is sleeved on the groove, the installation and fixation of the bearing are completed. The operation is simple, and it effectively prevents the inner ring of the bearing from rotating during high-speed rotation, which affects the normal operation of the kneader. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects, and advantages of the present utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 is a schematic structural diagram of a kneader;

[0020] Figure 2 is a schematic cross-sectional structure diagram of a roller;

[0021] Figure 3 is Figure 2 an enlarged structural diagram of the fixing mechanism in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the technical means, creative features, achieved purposes, and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Embodiment 1

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , the present utility model provides a technical solution for a bearing fixing device of a kneader roller:

[0025] As Figure 1 shown, the position of the roller 2 according to the embodiment of the present utility model will be described in detail.

[0026] Its structure includes a roller 2 rotatably installed inside the base of the kneader 1. The roller 2 includes a horizontally arranged roller body 21. Both ends of the roller body 21 are provided with a fixing mechanism for positioning the rotation of the roller body 21.

[0027] As Figure 2 shown, the detailed structure of the roller 2 according to the embodiment of the present utility model will be described in detail.

[0028] The fixing mechanism includes an assembly shaft 22 with an annular groove. A bearing 23 is sleeved on the middle section of the assembly shaft 22. A disassembly sleeve 24 is arranged on one side of the bearing 23, and a snap ring 25 is arranged on the other side.

[0029] As Figure 3 shown, the specific fixing method of the fixing mechanism according to the embodiment of the present invention will be described in detail.

[0030] On the inner wall of the end of the bearing 23 close to the snap ring 25, there is a first positioning groove 231. On the inner wall of the end of the bearing 23 close to the disassembly sleeve 24, there is a second positioning groove 232. On the outer wall of the assembly shaft 22, there is a groove 221 nested with the snap ring 25 and a positioning key installation groove 222 corresponding to the second positioning groove 232. A first positioning key 224 is embedded in the inner wall of the groove 221. The end of the first positioning key 224 away from the assembly shaft 22 is tightly embedded in the first positioning groove 231. A second positioning key 223 is embedded in the positioning key installation groove 222. The end of the second positioning key 223 away from the assembly shaft 22 is tightly embedded in the second positioning groove 232. Under the positioning of the groove 221 and the positioning key installation groove 222, the first positioning key 224 and the second positioning key 223 respectively limit and position the inner ring of the bearing 23, effectively preventing the inner ring of the bearing 23 from rotating.

[0031] For the convenience of assembly, both the first positioning key 224 and the second positioning key 223 are block structures with inclined surfaces at the top. The inclined surfaces on the first positioning key 224 and the second positioning key 223 are arranged axially opposite to each other.

[0032] To prevent the bearing 23 from moving towards the roller body 21, one side of the disassembly sleeve 24 abuts against the inner wall of the annular groove of the assembly shaft 22, and the other side abuts against the bearing 23 and the second positioning key 223 at the same time.

[0033] To prevent the bearing 23 from moving towards the assembly shaft 22, the side of the snap ring 25 facing the roller body 21 abuts against the bearing 23 and the first positioning key 224 at the same time.

[0034] For the convenience of disassembly, installation and maintenance, the disassembly sleeve 24 and the assembly shaft 22 are connected in a detachable manner, specifically in a tightly nested manner. This connection method is achieved by heat expansion and contraction treatment of the disassembly sleeve 24. After the disassembly sleeve 24 is heated and expanded, it is embedded in the assembly shaft 22. As the temperature drops, the disassembly sleeve 24 will contract and be positioned on the assembly shaft 22.

[0035] For the convenience of installation, the snap ring 25 is composed of two semi-circular snap strips, and the ends of the two snap strips are fixedly connected.

[0036] To improve the firmness of the connection, the fixed connection is specifically a bolt fixation, and this connection method effectively improves the convenience of disassembly and assembly.

[0037] To improve the rotational stability, the roller body 21 and the assembly shaft 22 are of an integrated structure. However, the present application is not limited thereto, and they can also be connected by welding, as long as the connection firmness between the roller body 21 and the assembly shaft 22 is ensured.

[0038] During installation, after the disassembly sleeve 24 is sleeved on the assembly shaft 22, the second positioning key 223 is first installed, and then the bearing 23 is sleeved on the assembly shaft 22. The second positioning groove 232 on the inner ring of the bearing 23 will be closely engaged with the second positioning key 223. Then, the first positioning key 224 is tightly embedded into the first positioning groove 231 on the inner ring of the bearing 23 through the groove 221. Finally, after the snap ring 25 is sleeved on the groove 221, the installation and fixation of the bearing 23 are completed. The operation is simple, and it effectively prevents the inner ring of the bearing 23 from rotating at high speed and affecting the normal operation of the internal mixer.

[0039] Embodiment 2

[0040] For the sake of simplicity of description, the parts identical to those of other embodiments will not be described again. Now, the structures different from those of other embodiments of the present invention will be mainly described. The snap ring 25 in the present application is composed of two semi-circular snap strips, and the ends of the two snap strips are fixedly connected. For the sake of improving the connection firmness, the fixed connection is specifically welding.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0042] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bearing fixing device for a mixing mill roller, characterized in that: The structure comprises a roller (2), wherein the roller (2) comprises a roller body (21) arranged horizontally, and both ends of the roller body (21) are provided with a fixing mechanism, and the fixing mechanism is used to position the rotation of the roller body (21); The fixing mechanism comprises an assembly shaft (22) with an annular groove, a bearing (23) is sleeved at the middle section of the assembly shaft (22), a disassembly sleeve (24) is provided on one side of the bearing (23), and a snap ring (25) is provided on the other side; A first positioning groove (231) is provided on the inner wall of the end portion of the bearing (23) close to the snap ring (25), and a second positioning groove (232) is provided on the inner wall of the end portion of the bearing (23) close to the disassembly sleeve (24); The outer wall of the assembly shaft (22) is provided with a groove (221) nested with the snap ring (25) and a positioning key installation groove (222) corresponding to the second positioning groove (232); the inner wall of the groove (221) is embedded with a first positioning key (224); the end of the first positioning key (224) away from the assembly shaft (22) is tightly embedded in the first positioning groove (231); the positioning key installation groove (222) is embedded with a second positioning key (223); the end of the second positioning key (223) away from the assembly shaft (22) is tightly embedded in the second positioning groove (232).

2. The bearing fixing device for a mixing mill roller according to claim 1, characterized in that: The first positioning key (224) and the second positioning key (223) are both block structures with an inclined surface on the top, and the inclined surfaces on the first positioning key (224) and the second positioning key (223) are arranged opposite to each other along the axial direction.

3. The bearing fixing device for a mixing mill roller according to claim 1, characterized in that: One side of the disassembly sleeve (24) abuts against the inner wall of the annular groove of the assembly shaft (22), and the other side abuts against the bearing (23) and the second positioning key (223) at the same time.

4. The bearing fixing device for a mixing mill roller according to claim 1, characterized in that: The side of the clamping ring (25) facing the roller body (21) simultaneously presses against the bearing (23) and the first positioning key (224).

5. The bearing fixing device for a mixing mill roller according to claim 1, characterized in that: The disassembly sleeve (24) and the assembly shaft (22) are connected in a detachable manner.

6. The bearing fixing device for a mixing mill roller according to claim 1, characterized in that: The clamping ring (25) is composed of two semicircular clamping strips, and the ends of the two clamping strips are fixedly connected.

7. The bearing fixing device for a mixing mill roller according to claim 6, characterized in that: The fixed connection is specifically a method of bolt fixing and welding.

8. The bearing fixing device for a mixing mill roller according to claim 1, characterized in that: The roller body (21) and the assembly shaft (22) are an integrated structure.

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