Gear box for extruder

Abstract

The utility model relates to the technical field of gear boxes, in particular to a gear box for an extruder, which comprises a box body, a middle core shaft rod is rotatably connected in the box body through a bearing, tooth grooves are arranged at two ends of the outer side of the middle core shaft rod, an input shaft rod is arranged at one end of the middle core shaft rod, and an output shaft rod is arranged at the other end of the middle core shaft rod. Output shaft rods are rotationally connected to the positions, located on the two sides of the middle core shaft rod, of the interior of the box body through bearings, and transmission gears fixedly sleeve the two ends of the outer sides of the output shaft rods through flat keys; a gear oil filtering assembly is arranged on one side of the box body and comprises a water suction pump installed on one side of the box body through an installation frame, and the water outlet end of the water suction pump is connected with a connecting pipe through a threaded groove; the water suction pump works to pump out gear oil in the box body through the oil outlet pipe, the gear oil is conveyed into the box body through the connecting pipe, impurities, powdered scraps and the like in the gear oil are filtered through the filter screen, the filtered gear oil flows back into the box body through the oil return pipe, and the situation that abrasion of a transmission gear and a tooth groove is increased by the impurities, the powdered scraps and the like is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, specifically to a gearbox for an extruder. Background Technology

[0002] A gearbox is a mechanical transmission device mainly used to transmit power and change the direction of speed and torque. It is widely used in various mechanical equipment, such as automobiles, industrial equipment, and spacecraft. Gearboxes achieve the required transmission ratio through different types of gear combinations.

[0003] Screw extruders rely on the pressure and shear force generated by the rotation of the screw to fully plasticize and uniformly mix materials, which are then formed through a die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and less common multi-screw extruders and screwless extruders.

[0004] Gearboxes are also required on extruders. Depending on the type of extruder, there are single-shaft or double-shaft gearboxes. However, existing double-shaft gearboxes do not have a filter structure and cannot filter the gear oil inside the gearbox. Therefore, a gearbox for extruders is proposed. A water pump draws out the gear oil from the gearbox, and a filter screen filters out impurities, powder, etc. The filtered gear oil flows back into the gearbox. Utility Model Content

[0005] To address the problems in the existing technology, this utility model provides a gearbox for an extruder, in which a water pump extracts gear oil from the gearbox, and a filter screen filters out impurities, powder, etc., from the inside of the gearbox. The filtered gear oil then flows back into the gearbox.

[0006] The technical solution adopted by this utility model to solve its technical problem is a gearbox for an extruder, including a housing, a central shaft is rotatably connected inside the housing via bearings, tooth grooves are opened at both ends of the outer side of the central shaft, an input shaft is provided at one end of the central shaft, and an output shaft is rotatably connected inside the housing on both sides of the central shaft via bearings, and transmission gears are fixedly sleeved at both ends of the outer side of the output shaft via flat keys;

[0007] A gear oil filter assembly is provided on one side of the housing. The gear oil filter assembly includes a water pump installed on one side of the housing via a mounting bracket. The water outlet of the water pump is connected to a connecting pipe via a threaded groove. One end of the connecting pipe is connected to a housing via a threaded groove. A housing cover is fixed to the bottom of the housing with bolts. A filter screen is fixed to the top of the housing inside the housing with bolts.

[0008] By adopting the above technical solution, when the input shaft rotates, it drives the central shaft to rotate. At the same time, the central shaft rotates through the tooth groove and transmission gear. The water pump works to extract the gear oil from the housing, and the filter screen filters out impurities, dust and other debris inside.

[0009] Specifically, a first protective component is provided at one end of the housing. The first protective component includes a first sleeve welded to one end of the housing. A first sealing sleeve is fitted on the inner side of the first sleeve near the housing. A first ring cover is fixed to one side of the first sleeve by bolts. The input shaft passes through the first sleeve. A bearing is fitted on the outer side of the input shaft inside the first sleeve.

[0010] Specifically, the housing is provided with second protective components at both ends on the side away from the first protective sleeve. The second protective components include second protective sleeves welded to both ends on one side of the housing. A second sealing sleeve is fitted on the inner side of the second protective sleeve near the housing. A second ring cover is fixed to one side of the second protective sleeve by bolts. The output shaft passes through the second protective sleeve. A bearing is fitted on the outer side of the output shaft inside the second protective sleeve.

[0011] Specifically, the water inlet of the water pump is connected to an oil outlet pipe via a threaded groove, and the side of the box is connected to an oil return pipe via a threaded groove. The end of the oil outlet pipe away from the water pump and the end of the oil return pipe away from the box are both connected to the inside of the box via pipe joints.

[0012] Specifically, side plates are welded to the bottom of both sides of the box, and a box cover is fixed to the top of the box with bolts.

[0013] Specifically, the transmission gear and the tooth groove mesh, and the inside of the housing is filled with gear oil.

[0014] The beneficial effects of this utility model are:

[0015] (1) The extruder gearbox of this utility model is provided in which the water pump is turned on to draw out the gear oil in the gearbox through the oil outlet pipe, and then transports it to the box through the connecting pipe. The impurities and dust in the gear oil are filtered by the filter screen, and the filtered gear oil flows back to the box through the oil return pipe to avoid impurities and dust increasing the wear of the transmission gears and tooth grooves.

[0016] (2) The extruder gearbox described in this utility model drives the input shaft and the central shaft at one end of the twin-screw extruder to rotate through the drive motor, and drives the output shaft to rotate through the tooth groove and transmission gear, thereby driving the two screws of the twin-screw extruder to rotate. The dual transmission design makes the structure stable. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the box of this utility model;

[0020] Figure 3 This is a schematic diagram of the gear oil filter assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the box body of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the first and second protective components of this utility model;

[0023] In the diagram: 1. Housing; 2. Gear oil filter assembly; 201. Water pump; 202. Oil outlet pipe; 203. Connecting pipe; 204. Box body; 205. Oil return pipe; 206. Box cover; 207. Filter screen; 3. Box cover; 4. Central shaft; 5. Output shaft; 6. Gear groove; 7. Transmission gear; 8. First protective assembly; 801. First protective sleeve; 802. First sealing sleeve; 803. First ring cover; 9. Second protective assembly; 901. Second protective sleeve; 902. Second sealing sleeve; 903. Second ring cover; 10. Input shaft; 11. Side plate. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] A water pump draws gear oil out of the gearbox, where it is filtered by a filter to remove impurities and dust. The filtered gear oil then flows back into the gearbox. Figure 1-5 As shown, the gearbox for an extruder according to the present invention includes a housing 1. A central shaft 4 is rotatably connected inside the housing 1 via bearings. Toothed grooves 6 are provided at both ends of the outer side of the central shaft 4. An input shaft 10 is provided at one end of the central shaft 4. Output shafts 5 are rotatably connected inside the housing 1 on both sides of the central shaft 4 via bearings. Transmission gears 7 are fixedly sleeved at both ends of the outer side of the output shafts 5 via flat keys.

[0026] A gear oil filter assembly 2 is provided on one side of the housing 1. The gear oil filter assembly 2 includes a water pump 201 mounted on one side of the housing 1 via a mounting bracket. The outlet end of the water pump 201 is connected to a connecting pipe 203 via a threaded groove. One end of the connecting pipe 203 is connected to a housing 204 via a threaded groove. A cover 206 is fixed to the bottom of the housing 204 by bolts. A filter screen 207 is fixed to the top of the cover 206 inside the housing 204 by bolts.

[0027] When in use, the input shaft 10 rotates, driving the central shaft 4 to rotate. At the same time, the central shaft 4 rotates through the toothed groove 6 and the transmission gear 7. The water pump 201 works to extract the gear oil from the housing 1, and the filter screen 207 filters out impurities, dust, etc. inside it.

[0028] For example, see question 2. Figure 5 As shown, the present invention also includes a first protective component 8 provided at one end of the housing 1. The first protective component 8 includes a first protective sleeve 801 welded to one end of the housing 1. A first sealing sleeve 802 is fitted on the inner side of the first protective sleeve 801 near the housing 1. A first ring cover 803 is fixed to one side of the first protective sleeve 801 by bolts. The input shaft 10 passes through the first protective sleeve 801. A bearing is fitted on the outer side of the input shaft 10 inside the first protective sleeve 801.

[0029] In use, the input shaft 10 is sleeved on the first sheath 801 through a bearing, which can improve the stability of the input shaft 10 and the central shaft 4. The first sealing sleeve 802 seals between the first sheath 801, the input shaft 10, and the housing 1.

[0030] For example, such as Figure 2 , Figure 5 As shown, this utility model also includes a second protective component 9 provided at both ends of the side of the housing 1 away from the first protective sleeve 801. The second protective component 9 includes a second protective sleeve 901 welded to both ends of one side of the housing 1. A second sealing sleeve 902 is sleeved on the inner side of the second protective sleeve 901 near the housing 1. A second ring cover 903 is fixed to one side of the second protective sleeve 901 by bolts. The output shaft 5 passes through the second protective sleeve 901. A bearing is sleeved on the outer side of the output shaft 5 inside the second protective sleeve 901.

[0031] In use, one end of the output shaft 5 is sleeved on the second sheath 901 through a bearing, which can improve the structural stability of the output shaft 5. The second sealing sleeve 902 seals the space between the second sheath 901, the output shaft 5, and the housing 1.

[0032] For example, such as Figure 3 As shown, the present invention also includes an oil outlet pipe 202 connected to the water inlet end of the water pump 201 via a threaded groove, and an oil return pipe 205 connected to one side of the box body 204 via a threaded groove. The end of the oil outlet pipe 202 away from the water pump 201 and the end of the oil return pipe 205 away from the box body 204 are both connected to the inside of the box body 1 via pipe joints.

[0033] During use, the water pump 201 works to draw out the gear oil from the housing 1 through the oil outlet pipe 202, and the filtered gear oil in the housing 204 flows back into the housing 1 through the return oil pipe 205.

[0034] For example, such as Figure 1 As shown, the present invention also includes side plates 11 welded to the bottom of both sides of the box body 1, and a box cover 3 fixed to the top of the box body 1 by bolts.

[0035] When in use, the side plate 11 is designed to make it easy for personnel to fix the box 1 with bolts, and the box cover 3 is used to seal the box 1.

[0036] For example, such as Figure 2 As shown, the present invention also includes that the transmission gear 7 and the tooth groove 6 mesh with each other, and that the housing 1 is filled with gear oil.

[0037] During use, the rotation of the central shaft 4 drives the output shaft 5 to rotate through the toothed groove 6 and the transmission gear 7, and the gear oil can lubricate the toothed groove 6 and the transmission gear 7.

[0038] In use, this utility model is installed on a twin-screw extruder using bolts via the side plate 11, and connected to an external power source using a power cord.

[0039] The drive motor on the twin-screw extruder drives the input shaft 10 and the central shaft 4 at one end to rotate, and drives the output shaft 5 to rotate through the toothed groove 6 and the transmission gear 7, thereby driving the two screws of the twin-screw extruder to rotate. The dual-drive design ensures structural stability.

[0040] The input shaft 10 is sleeved through the first sheath 801 via a bearing, which can improve the stability of the input shaft 10 and the central shaft 4. The first sealing sleeve 802 seals between the first sheath 801, the input shaft 10, and the housing 1. One end of the output shaft 5 is sleeved through the second sheath 901 via a bearing, which can improve the structural stability of the output shaft 5. The second sealing sleeve 902 seals between the second sheath 901, the output shaft 5, and the housing 1.

[0041] The water pump 201 is turned on to draw out the gear oil from the housing 1 through the oil outlet pipe 202. The oil is then transported to the box 204 through the connecting pipe 203. The filter screen 207 filters out impurities and dust in the gear oil. The filtered gear oil flows back to the housing 1 through the return oil pipe 205. The filtered impurities and dust are temporarily stored in the box cover 206. The box cover 206 can be opened to clean them.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A gearbox for an extruder, characterized in that, The device includes a housing (1), inside which a central shaft (4) is rotatably connected via bearings. The central shaft (4) has toothed grooves (6) at both ends on its outer side. An input shaft (10) is provided at one end of the central shaft (4). The housing (1) is rotatably connected via bearings to output shafts (5) on both sides of the central shaft (4). Transmission gears (7) are fixedly sleeved at both ends of the output shaft (5) via flat keys. A gear oil filter assembly (2) is provided on one side of the housing (1). The gear oil filter assembly (2) includes a water pump (201) installed on one side of the housing (1) via a mounting bracket. The outlet end of the water pump (201) is connected to a connecting pipe (203) via a threaded groove. One end of the connecting pipe (203) is connected to a housing (204) via a threaded groove. A cover (206) is fixed to the bottom of the housing (204) by bolts. A filter screen (207) is fixed to the top of the cover (206) inside the housing (204) by bolts.

2. The gearbox for an extruder according to claim 1, characterized in that, The housing (1) is provided with a first protective component (8) at one end. The first protective component (8) includes a first sleeve (801) welded to one end of the housing (1). A first sealing sleeve (802) is provided on the inner side of the first sleeve (801) close to the housing (1). A first ring cover (803) is fixed to one side of the first sleeve (801) by bolts. The input shaft (10) passes through the first sleeve (801). A bearing is provided on the outer side of the input shaft (10) inside the first sleeve (801).

3. The gearbox for an extruder according to claim 1, characterized in that, The housing (1) is provided with a second protective component (9) at both ends on the side away from the first protective sleeve (801). The second protective component (9) includes a second protective sleeve (901) welded to both ends on one side of the housing (1). A second sealing sleeve (902) is fitted on the inner side of the second protective sleeve (901) close to the housing (1). A second ring cover (903) is fixed on one side of the second protective sleeve (901) by bolts. The output shaft (5) passes through the second protective sleeve (901). A bearing is fitted on the outer side of the output shaft (5) inside the second protective sleeve (901).

4. A gearbox for an extruder according to claim 1, characterized in that, The water pump (201) has an oil outlet pipe (202) connected to its inlet end via a threaded groove. The box (204) has an oil return pipe (205) connected to one side via a threaded groove. The end of the oil outlet pipe (202) away from the water pump (201) and the end of the oil return pipe (205) away from the box (204) are both connected to the inside of the box (1) via pipe joints.

5. A gearbox for an extruder according to claim 1, characterized in that, The bottom of both sides of the box (1) is welded with side plates (11), and the top of the box (1) is fixed with a box cover (3) by bolts.

6. A gearbox for an extruder according to claim 1, characterized in that, The transmission gear (7) meshes with the tooth groove (6), and the housing (1) is filled with gear oil.

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