Special double-shaft speed reducer for rubber and plastic extrusion

Abstract

The utility model relates to the technical field of speed reducers, in particular to a special double-shaft speed reducer for rubber and plastic extrusion, which comprises a motor and a box body, the output end of the motor is connected with an input shaft, an elastic coupling is connected between the output end of the motor and one end of the input shaft, and a first output shaft and a second output shaft which are connected with a screw are rotatably mounted in the box body. The first output shaft and the second output shaft are connected with the input shaft in a meshed mode through a multi-stage gear pair, the first output shaft and the second output shaft are sleeved with the two sets of thrust self-aligning roller bearings respectively, and a lubricating system is arranged outside the thrust self-aligning roller bearings. When the speed reducer runs, the motor drives the input shaft to rotate, input torque is transmitted to the first output shaft through a three-stage gear pair in the speed reducer, part of torque is distributed to the second output shaft through a pair of gear pairs with the same tooth number, the output torque drives the screw to rotate, and the purposes that the input shaft can be directly connected with the motor and multi-shaft output can be achieved are achieved. And the lubricating system lubricates the thrust self-aligning roller bearing.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a dual-shaft speed reducer specifically for rubber and plastic extrusion. Background Technology

[0002] Traditional gear reducers for rubber and plastic extrusion typically employ a single input shaft and a single output shaft. However, with the rapid development of the rubber and plastic extrusion industry, user demands are increasingly focused on high productivity and modularity. Currently, a single production line requires the installation of multiple single-screw gear reducers for rubber and plastic extrusion.

[0003] In the prior art, patent CN2933829Y discloses a rubber and plastic screw extrusion reducer, which includes a housing, an input end cover, an intermediate stage end cover, a connecting flange, a filter, an oil pump, an oil pump motor, a cooler, an oil distributor, a pressure gauge, and oil pipes. The input end cover, the intermediate stage end cover, and the connecting flange are located on the front wall of the housing. The oil pump is connected to the oil pump motor via a coupling. The oil outlet of the oil pump is connected to the cooler and the oil distributor in sequence via oil pipes. The oil inlet of the oil pump is connected to the bottom of the inner cavity of the housing via an oil pipe. The filter is installed on the connecting pipe between the oil pump and the cooler.

[0004] The above structure makes the lubrication pipeline more reasonable, but it cannot guarantee that the input shaft can be directly connected to the motor when the reducer is running, and it cannot achieve multi-axis output. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a dual-shaft reducer for rubber and plastic extrusion, so as to solve the problems that the input shaft cannot be directly connected to the motor and multi-shaft output cannot be achieved.

[0006] To achieve the above objectives, this utility model provides a dual-shaft reducer specifically for rubber and plastic extrusion, comprising a motor and a housing. The output end of the motor is connected to an input shaft, and a flexible coupling connects the output end of the motor to one end of the input shaft. An output shaft one and an output shaft two, connected to a screw, are rotatably mounted inside the housing. The output shaft one, output shaft two, and input shaft are connected by a multi-stage gear pair. Two sets of thrust self-aligning roller bearings are fixedly installed inside the housing, respectively sleeved on the outside of output shaft one and output shaft two. A lubrication system is provided on the outside of the thrust self-aligning roller bearings.

[0007] Preferably, the lubrication system includes multiple sets of side plates fixedly installed on the housing, the internal space of the side plates is used to store lubricating oil, a filter is fixedly installed on the housing, the oil outlet of the filter is connected to a gear pump, the output end of the gear pump is fixedly connected to a pipe, and the end of the pipe is connected to two sets of thrust self-aligning roller bearings.

[0008] Preferably, a cooler is installed inside the pipe.

[0009] Preferably, the cooler is one of a plate cooler and a tubular cooler.

[0010] Preferably, a transition flange is fixedly installed on one side of the motor, the transition flange is fixedly connected to the housing, and the flexible coupling is located inside the transition flange.

[0011] Preferably, the first output shaft and the second output shaft are arranged parallel to each other, and the first output shaft and the second output shaft are components of the same size and the same length.

[0012] Preferably, the gear pair between the first output shaft and the input shaft is a three-stage gear pair, and the gear pair between the first output shaft and the second output shaft is a single-stage gear pair.

[0013] The beneficial effects of this utility model are:

[0014] When the reducer is running, the motor drives the input shaft to rotate. The input torque is transmitted to the first output shaft through the three-stage gear pair inside the reducer. A pair of gears with the same number of teeth diverts part of the torque to the second output shaft. The output torque drives the screw to rotate, thereby continuously extruding plastic or rubber material into the barrel, achieving the purpose of direct connection between the input shaft and the motor and multi-axis output.

[0015] Meanwhile, the lubrication system lubricates the thrust self-aligning roller bearing, extending its service life. The whole structure adopts a dual output shaft structure with thrust self-aligning roller bearings, which is compact but can withstand greater axial thrust, greatly reducing the installation space. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the box in this utility model;

[0019] Figure 3 This is a side view of the overall structure of this utility model.

[0020] The markings in the diagram are as follows: 1. Motor; 2. Input shaft; 3. Housing; 4. Output shaft one; 5. Output shaft two; 6. Gear pair; 7. Thrust self-aligning roller bearing; 8. Filter; 9. Flexible coupling; 10. Transition flange; 11. Pipeline; 12. Gear pump; 13. Side plate; 14. Cooler. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a dual-shaft reducer for rubber and plastic extrusion includes a motor 1 and a housing 3. The output end of the motor 1 is connected to an input shaft 2, and a flexible coupling 9 is connected between the output end of the motor 1 and one end of the input shaft 2. An output shaft 4 and an output shaft 5 connected to a screw are rotatably mounted inside the housing 3. The output shaft 4, the output shaft 5 and the input shaft 2 are connected by a multi-stage gear pair 6. Two sets of thrust self-aligning roller bearings 7 are fixedly installed inside the housing 3. The two sets of thrust self-aligning roller bearings 7 are respectively sleeved on the outside of the output shaft 4 and the outside of the output shaft 5. A lubrication system is provided on the outside of the thrust self-aligning roller bearings 7.

[0023] In this embodiment, when the reducer is running, the motor 1 drives the input shaft 2 to rotate. The input torque is transmitted to the output shaft 4 through the three-stage gear pair 6 inside the reducer. A portion of the torque is diverted to the output shaft 5 through a pair of gear pairs 6 with the same number of teeth. The output torque drives the screw to rotate, thereby continuously extruding plastic or rubber material into the barrel. This achieves the purpose of direct connection between the input shaft 2 and the motor 1 and multi-axis output. At the same time, the lubrication system lubricates the thrust self-aligning roller bearing 7, extending the service life of the thrust self-aligning roller bearing 7.

[0024] As one implementation method, such as Figure 1 , Figure 2 and Figure 3 As shown, the lubrication system includes multiple sets of side plates 13 fixedly installed on the housing 3. The internal space of the side plates 13 stores lubricating oil. A filter 8 is fixedly installed on the housing 3. The oil outlet of the filter 8 is connected to a gear pump 12 through an oil pipe. The output end of the gear pump 12 is fixedly connected to a pipe 11. The end of the pipe 11 is connected to two sets of thrust self-aligning roller bearings 7.

[0025] A cooler 14 is installed inside the pipe 11.

[0026] In this embodiment, when the reducer is running, the gear pump 12 on the reducer housing 3 will draw lubricating oil from the housing 3 and filter it through the filter 8 to remove impurities inside the housing 3. The oil is then connected to the thrust self-aligning roller bearing 7 through the pipe 11, thereby lubricating the thrust self-aligning roller bearing 7 and extending its service life. When the user's motor 1 has a high power and the lubricating oil temperature rises high, the cooler 14 will reduce the temperature of the lubricating oil inside the reducer.

[0027] As one implementation method, such as Figure 2 As shown, cooler 14 is one of plate cooler and tubular cooler.

[0028] In this embodiment, the plate cooler is small in size, and the number of plates can be flexibly increased or decreased to adjust the capacity, while the tubular cooler is adapted to meet the characteristics of high pressure and high temperature resistance.

[0029] As one implementation method, such as Figure 3 As shown, a transition flange 10 is fixedly installed on one side of the motor 1. The transition flange 10 is fixedly connected to the housing 3, and the flexible coupling 9 is located inside the transition flange 10. In this embodiment, the motor 1 is installed outside the reducer housing 3 through the transition flange 10, which improves the installation stability of the motor 1 and prevents the motor 1 from shaking when it is running.

[0030] As one implementation method, such as Figure 1 , Figure 2 As shown, output shaft 4 and output shaft 5 are arranged parallel to each other, and output shaft 4 and output shaft 5 are components of the same size and length.

[0031] In this embodiment, the reducer adopts a structure with a single input shaft 2 and dual output shafts, which can basically replace two single-screw plastic extrusion reducers, greatly reducing the installation space. Furthermore, the input shaft 2 is directly connected to the motor 1, saving the user the cost of the motor 1 base and reducing the steps of installing the motor 1.

[0032] As one implementation method, such as Figure 1 As shown, the gear pair 6 between output shaft 4 and input shaft 2 is a three-stage gear pair, and the gear pair 6 between output shaft 4 and output shaft 5 is a single-stage gear pair.

[0033] In this embodiment, the input torque is transmitted to the output shaft 4 through the three-stage gear pair 6 inside the reducer. A portion of the torque is diverted to the output shaft 5 through a pair of gear pairs 6 with the same number of teeth. The output torque drives the screw to rotate, thereby continuously extruding the plastic or rubber material into the barrel.

[0034] Working principle:

[0035] Motor 1 is connected to input shaft 2 via flexible coupling 9. Motor 1 is fixed to reducer housing 3 via transition flange 10. Input torque is transmitted to output shaft 4 through three-stage gear pair 6 inside the reducer. Part of the torque is diverted to output shaft 5 through a pair of gear pairs 6 with the same number of teeth. The output torque drives the screw to rotate, thereby continuously extruding plastic or rubber material into the barrel. When the reducer is running, gear pump 12 on reducer housing 3 draws lubricating oil from housing 3. The oil is filtered by filter 8 to remove impurities inside housing 3 and then connected to thrust self-aligning roller bearing 7 through pipe 11, thereby lubricating the thrust self-aligning roller bearing 7 and extending its service life. When the user's motor 1 has a high power and the lubricating oil temperature rises high, the temperature of the lubricating oil inside the reducer is reduced by cooler 14.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0037] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A special double shaft speed reducer for rubber and plastic extrusion, comprising a motor (1) and a box (3), an input shaft (2) is connected to the output end of the motor (1), characterized in that, The output end of the motor (1) is connected with one end of the input shaft (2) through an elastic coupling (9); the inside of the box body (3) is rotatably provided with an output shaft one (4) and an output shaft two (5) connected with a screw rod, the output shaft one (4) and the output shaft two (5) are connected through a multi-stage gear pair (6); the inside of the box body (3) is fixedly provided with two groups of thrust self-aligning roller bearings (7), the two groups of thrust self-aligning roller bearings (7) are respectively sleeved on the outside of the output shaft one (4) and the outside of the output shaft two (5), and the outside of the thrust self-aligning roller bearing (7) is provided with a lubricating system.

2. A double shaft speed reducer for rubber and plastic extrusion according to claim 1, characterized in that, The lubricating system comprises a plurality of side plates (13) fixedly installed on the box body (3), the inside of the side plate (13) stores lubricating oil, the box body (3) is fixedly provided with a filter (8), the oil outlet of the filter (8) is communicated with a gear pump (12), the output end of the gear pump (12) is fixedly connected with a pipeline (11), and the tail end of the pipeline (11) is communicated with the two groups of thrust self-aligning roller bearings (7).

3. A double shaft speed reducer for rubber and plastic extrusion as claimed in claim 2 wherein, The inside of the pipeline (11) is provided with a cooler (14).

4. A double shaft speed reducer for rubber and plastic extrusion as claimed in claim 3 wherein, The cooler (14) is one of a plate cooler and a tube cooler.

5. A double shaft speed reducer for rubber and plastic extrusion as claimed in claim 1 wherein, One side of the motor (1) is fixedly provided with an excess flange (10), the excess flange (10) is fixedly connected with the box body (3), and the elastic coupling (9) is located in the inside of the excess flange (10).

6. A double shaft speed reducer for rubber and plastic extrusion as claimed in claim 1 wherein, The output shaft one (4) and the output shaft two (5) are arranged in parallel, and the output shaft one (4) and the output shaft two (5) are components with the same size and the same length.

7. A double shaft speed reducer for rubber and plastic extrusion as claimed in claim 1 wherein, The gear pair (6) between the output shaft one (4) and the input shaft (2) is three-stage, and the gear pair (6) between the output shaft one (4) and the output shaft two (5) is one-stage.

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