Variable speed gear box and extruder

Abstract

The application belongs to the technical field of extruders, and discloses a variable speed gearbox and an extruder. The variable speed gearbox comprises a box body, a planetary mechanism, a first power shaft, an input shaft and a variable speed system. The planetary mechanism is arranged in the box body. The planetary mechanism has an output part, a first input part and a second input part. The first input part and the second input part are respectively connected in transmission with the output part. One end of the first power shaft is located in the box body and is connected in transmission with the output part. One end of the input shaft extends into the box body and is connected in transmission with the first input part. The other end of the input shaft extends out of the box body and is used for being connected with a driving device. The rotation of the input shaft is transmitted to the first power shaft through the first input part and the output part. The variable speed system is connected in transmission with the second input part. The rotation of the variable speed system is transmitted to the first power shaft through the second input part and the output part. The variable speed gearbox can realize stepless speed regulation, and greatly improves the application range and practicability of the variable speed gearbox.

Description

Technical Field

[0001] This invention relates to the field of extruder technology, and more particularly to a variable speed gearbox and an extruder. Background Technology

[0002] An extruder is a commonly used plastic machinery device that uses the pressure and shearing force generated by the rotation of the screw to extrude and blend various materials, so that the raw materials are fully plasticized and uniformly mixed for subsequent shaping processing.

[0003] The screw gearbox is the core component of an extruder. Currently, most commonly used screw gearboxes adjust the internal working gear pairs through a shift fork mechanism to change the output speed. However, this type of speed change mechanism can only provide two or three fixed output speeds, and when the output speed is high, the gearbox will generate more severe vibrations, which will affect the stability of the extrusion operation.

[0004] Therefore, there is an urgent need to design a variable speed gearbox to solve the above-mentioned problems in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a variable speed gearbox and an extruder that can achieve stepless speed regulation, thereby improving the applicability and practicality.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The transmission gearbox includes:

[0008] Box;

[0009] A planetary mechanism is disposed within the housing. The planetary mechanism has an output section, a first input section, and a second input section, with the first input section and the second input section respectively transformably connected to the output section.

[0010] A first power shaft, one end of which is located inside the housing and is connected to the output unit in a transmission manner, and the other end of which extends out of the housing;

[0011] An input shaft, one end of which extends into the housing and is connected to the first input section, and the other end of which extends out of the housing for connection with a drive device; the rotation of the input shaft is transmitted to the first power shaft through the first input section and the output section.

[0012] The transmission system is connected to the second input unit, and the rotation of the transmission system is transmitted to the first power shaft through the second input unit and the output unit.

[0013] Preferably, the planetary mechanism includes a sun gear, a planet carrier, an external gear ring, and planet gears. The planet gears are rotatably mounted on the planet carrier, the external gear ring is fitted onto the planet carrier and meshes with the planet gears, and the sun gear meshes with the planet gears.

[0014] The input shaft is connected to the sun gear, and the rotation of the input shaft can drive the sun gear to rotate. The planet carrier is connected to the first power shaft, and the external gear ring is connected to the transmission system, which can drive the external gear ring to rotate.

[0015] Preferably, the transmission system includes a transmission motor, a transmission shaft, and a gear shaft system. The gear shaft system is disposed in the housing. One end of the transmission shaft extends out of the housing and is connected to the transmission motor. The other end of the transmission shaft extends into the housing and is connected to the gear shaft system. The gear shaft system is connected to the external gear ring.

[0016] Preferably, the outer circumferential surface of the outer gear ring is provided with outer gear teeth, and the inner circumferential surface of the outer gear ring is provided with inner gear teeth. The inner gear teeth mesh with the planetary gears, and the outer gear teeth mesh with the gear shaft system.

[0017] Preferably, the gearbox further includes a first drive shaft disposed within the gearbox body. The first drive shaft is parallel to and connected to the input shaft, and the sun gear is coaxially disposed on the first drive shaft.

[0018] Preferably, the gearbox further includes a second power shaft, which is arranged parallel to the first power shaft. One end of the second power shaft is located inside the gearbox and is connected to the first power shaft for transmission, while the other end of the second power shaft extends out of the gearbox.

[0019] Preferably, the first power shaft is provided with a first gear tooth, and the second power shaft is provided with a second gear tooth;

[0020] The transmission gearbox also includes a linkage mechanism, which includes a second transmission shaft, a front gear, and a rear gear. The second transmission shaft is arranged parallel to the first power shaft. The front gear and the rear gear are coaxially fixed on the second transmission shaft. The front gear meshes with the first gear tooth portion, and the rear gear meshes with the second gear tooth portion.

[0021] Preferably, there are two linkage mechanisms, which are symmetrically arranged on both sides of the first power shaft.

[0022] Preferably, both the first power shaft and the input shaft are rotatably coupled to the housing via bearings.

[0023] An extruder includes a drive unit and the aforementioned gearbox, wherein the output end of the drive unit is connected to the input shaft, and the drive unit is capable of driving the input shaft to rotate.

[0024] The beneficial effects of this invention are as follows:

[0025] The transmission gearbox provided by this invention includes a housing, a planetary mechanism, a first power shaft, an input shaft, and a transmission system. Since the input shaft is connected to a drive device and its end extending into the housing is connected to the planetary mechanism via a transmission connection, and since the first power shaft is also connected to the planetary mechanism via a transmission connection, the drive device can drive the planetary mechanism to rotate via the input shaft, thereby driving the first power shaft to rotate and achieving normal power output. The planetary mechanism has an output section, a first input section, and a second input section. The first and second input sections are respectively connected to the output section via a transmission connection. Since the rotation of the input shaft is transmitted to the first power shaft through the first input section and the output section, and since the rotation of the transmission system can be transmitted to the first power shaft through the second input section and the output section, the transmission system can adjust the speed of the planetary mechanism's output section by changing the speed of the second input section, thereby ultimately achieving the output speed of the first power shaft. Simultaneously, since the transmission system adjusts the output speed of the first power shaft by changing its own speed, this transmission gearbox can achieve stepless speed regulation, greatly improving its applicability and practicality.

[0026] The extruder provided by the present invention includes a drive device and the aforementioned gearbox. The extruder can be continuously adjusted through the speed change system, and operates smoothly and reliably. It can perform extrusion operations on a variety of different materials, greatly improving work efficiency and applicability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal structure of the gearbox provided in a specific embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0029] Figure 3 This is a side view of the transmission system provided in a specific embodiment of the present invention;

[0030] Figure 4 This is a top view of the transmission system provided in a specific embodiment of the present invention;

[0031] Figure 5 This is a side view of the linkage mechanism provided in a specific embodiment of the present invention;

[0032] Figure 6This is a top view of the linkage mechanism provided in a specific embodiment of the present invention.

[0033] In the picture:

[0034] 1-Box;

[0035] 2-Planetary mechanism; 21-Sun gear; 22-Planet carrier; 23-External gear ring; 24-Planet gears;

[0036] 3-First drive shaft; 31-First gear tooth;

[0037] 4-Input axis;

[0038] 5-Transmission system; 51-Transmission shaft; 52-Third drive shaft; 53-Fourth drive shaft;

[0039] 6-Second drive shaft; 61-Second gear teeth;

[0040] 7-Linkage mechanism; 71-Second drive shaft; 72-Front end gear; 73-Rear end gear;

[0041] 8-First drive shaft. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0043] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0046] like Figure 1 and Figure 2 As shown, the present invention provides a transmission gearbox, which includes a housing 1, a planetary mechanism 2, a first drive shaft 3, an input shaft 4, and a transmission system 5. The planetary mechanism 2 is disposed inside the housing 1 and has an output section, a first input section, and a second input section. The first input section and the second input section are respectively driven to the output section. One end of the first drive shaft 3 is located inside the housing 1 and is driven to the output section, while the other end of the first drive shaft 3 extends out of the housing 1. One end of the input shaft 4 extends into the housing 1 and is driven to the first input section, while the other end of the input shaft 4 extends out of the housing 1 for connection to a drive device. The rotation of the input shaft 4 is transmitted to the first drive shaft 3 through the first input section and the output section. The transmission system 5 is driven to the second input section, and the rotation of the transmission system 5 is transmitted to the first drive shaft 3 through the second input section and the output section.

[0047] In this embodiment, since the input shaft 4 is connected to the drive device and the end of the input shaft 4 extending into the housing 1 is connected to the planetary mechanism 2, and since the first power shaft 3 is also connected to the planetary mechanism 2, the drive device can drive the planetary mechanism 2 to rotate through the input shaft 4, thereby driving the first power shaft 3 to rotate, thus achieving normal power output. The planetary mechanism 2 has an output section, a first input section, and a second input section. The first input section and the second input section are respectively connected to the output section. Since the rotation of the input shaft is transmitted to the first power shaft 3 through the first input section and the output section, and since the rotation of the transmission system 5 can be transmitted to the first power shaft 3 through the second input section and the output section, the transmission system 5 can adjust the speed of the output section of the planetary mechanism 2 by changing the speed of the second input section, thereby ultimately achieving the output speed of the first power shaft 3. At the same time, since the transmission system 5 adjusts the output speed of the first power shaft 3 by changing its own speed, the transmission gearbox can achieve stepless speed regulation, greatly improving the applicability and practicality of the transmission gearbox.

[0048] Specifically, such as Figure 1 and Figure 2As shown, the planetary mechanism 2 includes a sun gear 21, a planet carrier 22, an external gear ring 23, and planet gears 24. The planet gears 24 are rotatably mounted on the planet carrier 22. The external gear ring 23 is fitted onto the planet carrier 22 and meshes with the planet gears 24. The sun gear 21 meshes with the planet gears 24. The input shaft 4 is connected to the sun gear 21. The rotation of the input shaft 4 can drive the sun gear 21 to rotate. The planet carrier 22 is connected to the first power shaft 3. The external gear ring 23 is connected to the transmission system 5. The transmission system 5 can drive the external gear ring 23 to rotate. In this embodiment, the planetary mechanism 2 is a differential planetary gear set commonly used in the art, that is, both the external gear ring 23 and the sun gear 21 can actively rotate to drive the planet carrier 22 to rotate, and the transmission system 5 can adjust the speed of the external gear ring 23 to match the sun gear 21 to change the output speed of the planet carrier 22; since the sun gear 21 meshes with the planet gear 24, and the planet gear 24 meshes with the external gear ring 23, the rotation of the sun gear 21 can drive the planetary mechanism 2 to operate; wherein the first input part is the sun gear 21, the second input part is the external gear ring 23, and the output part is the planet carrier 22; it can be understood that when the input shaft 4 rotates to drive the sun gear 21 to rotate, the planet gear 24 will rotate and revolve under the drive of the sun gear 21, and the planet carrier 22 will also be driven to rotate. The planet carrier 22 is connected to the first power shaft 3 through a spline, so the rotation of the planet carrier 22 can be transmitted to the first power shaft 3, thereby realizing the power output of the transmission gearbox.

[0049] like Figures 1 to 4 As shown, the speed change system 5 includes a speed change motor, a speed change shaft 51, and a gear shaft system. The gear shaft system is housed within the housing 1. One end of the speed change shaft 51 extends out of the housing 1 and connects to the speed change motor, while the other end extends into the housing 1 and is connected to the gear shaft system. The gear shaft system is also connected to the external gear ring 23. Specifically, the speed change motor is located outside the housing 1, and its output end is fixedly connected to the speed change shaft 51. When the speed change shaft 51 rotates under the drive of the speed change motor, it drives the gear shaft system to rotate, which in turn drives the external gear ring 23 to rotate. This changes the transmission ratio of the planetary mechanism 2, altering the output speed of the planetary carrier 22 and ultimately achieving the speed change effect of the first power shaft 3. It is understandable that since the speed of the speed change motor can be adjusted according to actual needs, the operator can select a suitable output speed based on the type of material being processed, thus achieving stepless speed regulation of the gearbox.

[0050] In this embodiment, the planetary mechanism 2 is a differential planetary gear set commonly used in the art. The outer circumferential surface of the outer gear ring 23 is provided with outer gear teeth, and the inner circumferential surface of the outer gear ring 23 is provided with inner gear teeth. The inner gear teeth mesh with the planet gear 24, and the outer gear teeth mesh with the gear shaft system.

[0051] The specific structure of the gear shaft system can be set according to the actual situation, as long as it can realize the power transmission between the gear shaft 51 and the external gear ring 23; for example, such as Figure 1 , Figure 3 as well as Figure 4 As shown, the gear shaft system includes a third transmission shaft 52 and a fourth transmission shaft 53. The third transmission shaft 52 is provided with two sets of gear teeth, and the fourth transmission shaft 53 is also provided with two sets of gear teeth. The gear transmission shaft 51 is provided with one set of gear teeth. One set of gear teeth on the third transmission shaft 52 meshes with the gear teeth on the gear transmission shaft 51. Therefore, the rotation of the gear transmission shaft 51 can drive the rotation of the third transmission shaft 52. The other set of gear teeth on the third transmission shaft 52 meshes with one set of gear teeth on the fourth transmission shaft 53. Therefore, the rotation of the third transmission shaft 52 can drive the rotation of the fourth transmission shaft 53. The other set of gear teeth on the fourth transmission shaft 53 meshes with the outer gear teeth of the outer gear ring 23, thereby ultimately realizing the driving of the outer gear ring 23. It is understood that the gear shift shaft 51, the third drive shaft 52, and the fourth drive shaft 53 can achieve different speeds and torque transmissions by changing the gear ratio, thereby achieving the purpose of speed change or torque change. In this embodiment, the axes of the third drive shaft 52, the fourth drive shaft 53, the input shaft 4, and the sun gear 21 are all located at the same height, while the gear shift shaft 51 is positioned below the third drive shaft 52 along the height direction. Figure 1 The transmission shaft 51 is not shown in the image.

[0052] like Figure 1 As shown, the transmission gearbox also includes a first drive shaft 8, which is disposed within the housing 1. The first drive shaft 8 is parallel to and drives the input shaft 4. The sun gear 21 is coaxially disposed on the first drive shaft 8. In this embodiment, the input shaft 4 is provided with gear teeth, and the first drive shaft 8 is also provided with gear teeth. The input shaft 4 achieves transmission cooperation with the first drive shaft 8 through gear tooth meshing. The end of the first drive shaft 8 is connected to the sun gear 21 via a spline. It can be understood that different speeds and torques can be transmitted between the input shaft 4 and the first drive shaft 8 by changing the gear tooth ratio.

[0053] To increase the output power of this transmission gearbox, such as Figure 6 As shown, the transmission gearbox also includes a second power shaft 6, which is arranged parallel to the first power shaft 3. One end of the second power shaft 6 is located inside the housing 1 and is connected to the first power shaft 3 for transmission, while the other end of the second power shaft 6 extends out of the housing 1. In this embodiment, the second power shaft 6 is arranged parallel to the first power shaft 3 and its end extends out of the housing 1, so the second power shaft 6 and the first power shaft 3 can synchronously transmit power to the outside.

[0054] The transmission connection method between the first power shaft 3 and the second power shaft 6 can be set according to actual conditions. In this embodiment, for example... Figure 1 , Figure 5 as well as Figure 6 As shown, a first gear tooth 31 is provided on the first power shaft 3, and a second gear tooth 61 is provided on the second power shaft 6; the gearbox also includes a linkage mechanism 7, which includes a second transmission shaft 71, a front gear 72, and a rear gear 73. The second transmission shaft 71 is arranged parallel to the first power shaft 3. The front gear 72 and the rear gear 73 are coaxially fixed on the second transmission shaft 71. The front gear 72 meshes with the first gear tooth 31, and the rear gear 73 meshes with the second gear tooth 61.

[0055] like Figure 5 and Figure 6 As shown, two linkage mechanisms 7 are provided, symmetrically arranged on both sides of the first power shaft 3. These two linkage mechanisms 7 can achieve power splitting, thereby increasing the torque density output by the first power shaft 3. In this embodiment, the first power shaft 3 and the second power shaft 6 are spaced apart horizontally, while the two linkage mechanisms 7 are respectively positioned above and below the first power shaft 3 along the height direction. Therefore... Figure 1 The two linkage mechanisms 7 are not shown in the image.

[0056] In this embodiment, the first power shaft 3 and the input shaft 4 are rotatably connected to the housing 1 through bearings. In addition, the first transmission shaft 8, the second power shaft 6, the speed change shaft 51, the third transmission shaft 52 and the fourth transmission shaft 53 are rotatably connected to the housing 1 through bearings.

[0057] The working process of this gearbox is roughly as follows:

[0058] First, when starting the gearbox, the operator starts the transmission motor of the transmission system 5. At this time, the drive equipment is still in the off state, the input shaft 4 and the sun gear 21 are fixed and do not rotate, and the transmission shaft 51 drives the external gear ring 23 to rotate through the gear shaft system. In this state, the sun gear 21 is fixed and does not rotate, the planet carrier 22 rotates under the drive of the external gear ring 23, and the output speed of the first power shaft 3 and the second power shaft 6 is low, thereby realizing the low-speed and smooth start of the gearbox.

[0059] Afterwards, the staff starts the drive equipment, and the input shaft 4 drives the sun gear 21 to rotate through the first transmission shaft 8. At this time, the planet carrier 22 rotates under the joint drive of the sun gear 21 and the external gear ring 23. In this state, the output speed of the first power shaft 3 and the second power shaft 6 reaches the predetermined speed, thereby realizing the normal operation of the gearbox.

[0060] When the type of material being processed changes and the output speed of the gearbox needs to be adjusted, the operator changes the speed of the transmission shaft 51 via the transmission motor. Because the external gear ring 23 is connected to the transmission shaft 51 via a gear system, the external gear ring 23 will also adjust to the corresponding speed, and the planetary carrier 22 will rotate at the new speed, thus changing the output speed of the first power shaft 3 and the second power shaft 6. It is understandable that the speed of the transmission motor can be adjusted according to actual needs; therefore, the operator can select the appropriate speed of the transmission motor based on the type of material being processed, thereby achieving stepless speed regulation of the gearbox.

[0061] This embodiment also provides an extruder, which includes a drive device and the aforementioned gearbox. The output end of the drive device is connected to the input shaft 4, and the drive device can drive the input shaft 4 to rotate.

[0062] In this embodiment, the extruder can be continuously adjusted through a speed change system, and it operates smoothly and reliably. It can perform extrusion operations on a variety of different materials, which greatly improves work efficiency and applicability.

[0063] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A variable speed gearbox, characterized in that, include: Box (1); Planetary mechanism (2), the planetary mechanism (2) is disposed inside the housing (1), the planetary mechanism (2) has an output part, a first input part and a second input part, the first input part and the second input part are respectively drivenly connected to the output part; The first power shaft (3) has one end located inside the housing (1) and connected to the output unit for transmission, and the other end of the first power shaft (3) extends out of the housing (1). An input shaft (4) has one end extending into the housing (1) and being connected to the first input part, and the other end extending out of the housing (1) for connection with a drive device. The rotation of the input shaft (4) is transmitted to the first power shaft (3) through the first input part and the output part. The transmission system (5) is connected to the second input unit, and the rotation of the transmission system (5) is transmitted to the first power shaft (3) through the second input unit and the output unit. The planetary mechanism (2) includes a sun gear (21), a planet carrier (22), an external gear ring (23), and planet gears (24). The planet gears (24) are rotatably mounted on the planet carrier (22). The external gear ring (23) is fitted onto the planet carrier (22) and meshes with the planet gears (24). The sun gear (21) meshes with the planet gears (24). The input shaft (4) is connected to the sun gear (21). The rotation of the input shaft (4) can drive the sun gear (21) to rotate. The planet carrier (22) is connected to the first power shaft (3). The external gear ring (23) is connected to the transmission system (5). The transmission system (5) can drive the external gear ring (23) to rotate. The gearbox further includes a first drive shaft (8), which is disposed inside the housing (1). The first drive shaft (8) is parallel to and connected to the input shaft (4). The sun gear (21) is coaxially disposed on the first drive shaft (8). The gearbox further includes a second power shaft (6), which is arranged parallel to the first power shaft (3). One end of the second power shaft (6) is located inside the housing (1) and is connected to the first power shaft (3) in a transmission manner. The other end of the second power shaft (6) extends out of the housing (1). The first power shaft (3) is provided with a first gear tooth (31), and the second power shaft (6) is provided with a second gear tooth (61). The gearbox further includes a linkage mechanism (7), which includes a second drive shaft (71), a front gear (72), and a rear gear (73). The second drive shaft (71) is arranged parallel to the first power shaft (3). The front gear (72) and the rear gear (73) are coaxially fixed on the second drive shaft (71). The front gear (72) meshes with the first gear tooth (31), and the rear gear (73) meshes with the second gear tooth (61). There are two linkage mechanisms (7), which are symmetrically arranged on both sides of the first power shaft (3).

2. The gearbox according to claim 1, characterized in that, The speed change system (5) includes a speed change motor, a speed change shaft (51) and a gear shaft system. The gear shaft system is located inside the housing (1). One end of the speed change shaft (51) extends out of the housing (1) and is connected to the speed change motor. The other end of the speed change shaft (51) extends into the housing (1) and is connected to the gear shaft system. The gear shaft system is connected to the external gear ring (23).

3. The gearbox according to claim 2, characterized in that, The outer circumferential surface of the outer gear ring (23) is provided with outer gear teeth, and the inner circumferential surface of the outer gear ring (23) is provided with inner gear teeth. The inner gear teeth mesh with the planetary gear (24), and the outer gear teeth mesh with the gear shaft system.

4. The gearbox according to claim 1, characterized in that, The first power shaft (3) and the input shaft (4) are both rotatably coupled to the housing (1) via bearings.

5. An extruder, characterized in that, The device includes a drive unit and a gearbox as described in any one of claims 1-4, wherein the output end of the drive unit is connected to the input shaft (4), and the drive unit is capable of driving the input shaft (4) to rotate.

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