CN218971792U

CN218971792U - Gear box for extruder

Info

Publication number: CN218971792U
Application number: CN202223599486.4U
Authority: CN
Inventors: 张吉利
Original assignee: Nanjing Tengda Machinery Equipment Co ltd
Current assignee: Nanjing Tengda Machinery Equipment Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-05
Anticipated expiration: 2032-12-30

Abstract

The application relates to a gear box for extruder belongs to the gear box field, and it includes box, transmission shaft and two output shafts, and transmission shaft and output shaft rotate to be connected in the box, rotate in the box and be connected with first gear, all be provided with the second gear on two output shafts, be provided with drive gear on the transmission shaft, second gear and drive gear respectively with first gear engagement. The application has the advantages that the situation that the two output shafts are subjected to the inconsistent abrasion conditions to cause the axial deviation of the two output shafts is reduced, so that the effect of achieving the stability of double-screw output through the gearbox is improved.

Description

Gear box for extruder

Technical Field

The application relates to the field of gear boxes, in particular to a gear box for an extruder.

Background

As shown in fig. 1, in the related art, a conventional gear box of a twin-screw extruder is generally that an input shaft 11 rotates, then an input shaft gear 111 of the input shaft 11 drives a first long shaft gear 121 to rotate, the first long shaft gear 121 drives a long shaft 12 to rotate, a second long shaft gear 122 of the long shaft 12 drives a first carrier gear 131 to rotate, the first carrier gear 131 drives a carrier shaft 13 to rotate, then a second carrier gear 132 of the carrier shaft 13 drives a short shaft gear 141 to rotate, finally the short shaft gear 141 drives a short shaft 14 to rotate, and the long shaft 12 and the short shaft 14 extend from an output end together to rotate and finally realize twin-screw output.

For the related art, the gear sets meshed with the gear boxes of the common double-screw extruder are more, because the sizes of the long shaft 12 and the short shaft 14 are different, the short shaft 14 positioned at the tail end of the transmission stage is subjected to a larger load, and the long shaft 12 positioned at the initial end of the transmission stage is subjected to a smaller load, so that the abrasion condition of the long shaft 12 is inconsistent with the abrasion condition of the short shaft 14, and further, axial dislocation occurs between the long shaft 1 and the short shaft 13, and the normal operation of the gear boxes is affected.

Disclosure of Invention

In order to reduce the situation that the gear box cannot normally output double screws due to inconsistent abrasion conditions of two output shafts, the application provides a gear box for an extruder.

The application provides a gear box for extruder adopts following technical scheme:

the utility model provides a gear box for extruder, includes box, transmission shaft and two output shafts, transmission shaft and output shaft rotate to be connected in the box, it is connected with first gear to rotate in the box, two all be provided with the second gear on the output shaft, be provided with drive gear on the transmission shaft, second gear and drive gear respectively with first gear engagement.

Through adopting above-mentioned technical scheme, when the transmission shaft rotated, drive gear drove first gear and rotated, first gear drove two second gears simultaneously and rotated, two second gears drive two output shafts respectively and rotated, the structure of crossing axle, first bridge gear and second bridge gear has been replaced through first gear, make the structure of gear box for the extruder simpler, because two output shafts are located same transmission series and size, so the degree of wear of two output shafts is the same, and then reduced because the degree of wear of output shaft is different to lead to the condition of axial dislocation to appear between the output shaft, and then improve gear box durability, realize the normal operating of gear box.

Optionally, two output shafts all pass first gear, be provided with on the first gear inside wall be used for simultaneously with two second gear meshing's internal tooth, two leave the space between the second gear, be provided with on the first gear lateral wall be used for with transmission gear meshing's external tooth.

Through adopting above-mentioned technical scheme for the rotation direction of second gear and first gear is the same, has practiced thrift the inner space of box with the second gear setting in first gear simultaneously, thereby has reduced the volume of box, makes the structure of box compacter.

Optionally, the first gear is provided with the support sleeve along its axial both ends, be provided with in the box with support sleeve matched with first bearing.

Through adopting above-mentioned technical scheme, first bearing plays the fixed action to first gear, has reduced the condition that the deviation appears in first gear, makes the gear box for the extruder can normally operate.

Optionally, first hole has all been seted up at the both ends of box, two all can dismantle on the first hole and be connected with the first gland that is used for fixing a position the output shaft, it is connected with the bearing sleeve to dismantle on the first gland, the one end that the bearing sleeve kept away from first gland can be dismantled and be connected with first closing cap, install combination thrust bearing in the bearing sleeve, the output shaft is pegged graft at combination thrust bearing inner circle and mutually tight fit.

Through adopting above-mentioned technical scheme, with end cover and bearing sleeve separation, then with bearing sleeve and first gland separation, at last with two first glands and box separation, can take out the output shaft from the box in and detect or maintain, replaced the mode that the upper end cover of box can take out the output shaft with opening completely, improved the convenience of box, combined thrust bearing has certain thrust to the output shaft simultaneously, thereby reduce the condition that axial dislocation appears between two output shafts, stability when the operation of output shaft is improved.

Optionally, be provided with the cushion in the one end that the bearing sleeve kept away from the box, the terminal surface and the cushion butt of combination thrust bearing kept away from the output shaft outer lane.

Through adopting above-mentioned technical scheme, the cushion plays fixed effect to combination thrust bearing, has reduced the condition that combination thrust bearing inner circle directly contacted with first closing cap simultaneously, has improved combination thrust bearing's durability.

Optionally, a cylindrical roller bearing is arranged in the box body, and the transmission shaft penetrates through and is tightly matched with the inner ring of the cylindrical roller bearing.

By adopting the technical scheme, the cylindrical roller bearing effectively prevents the increase of the rotation torque, thereby reducing the abrasion of the transmission shaft and the output shaft.

Optionally, a second hole is formed in the box body, and a second gland for positioning the transmission shaft is arranged in the second hole.

By adopting the technical scheme, the second gland is used for fixing the transmission shaft, so that the radial runout of the transmission shaft is reduced, and the operation stability of the gear box for the extruder is improved.

Optionally, an oil pump is arranged on the box body, and the oil pump is connected with the transmission shaft.

Through adopting above-mentioned technical scheme, connect the oil pump on the box, can drive the oil pump operation simultaneously when the transmission shaft is operated, the structure of messenger's box is compacter.

Optionally, the input end of transmission shaft and the output of output shaft are provided with the oil blanket, first gland and second gland all are provided with the second closing cap that is used for fixed oil blanket.

By adopting the technical scheme, the situation that oil leakage occurs at the output end and the input end of the box body during operation can be reduced.

Optionally, an air filter is arranged on the box body.

By adopting the technical scheme, the air filter can prevent the probability of abrasion and damage of internal parts caused by sucking air with impurity particles by the gear box of the extruder during operation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the transmission shaft, the first gear and the two output shafts are arranged in the box body. The transmission gear of the transmission shaft drives the first gear to operate, the first gear drives the two output shafts to operate simultaneously, the first gear replaces a gap bridge structure in a conventional gear box, the internal structure of the gear box for the extruder is simplified, and further the weight of the gear box for the extruder is smaller, and fewer parts are used;

2. through set up external tooth and internal tooth on first gear, first gear can simultaneously with drive gear and two second gear engagement, and then make two second gears can drive two output shafts and function simultaneously, reduced the different condition that appears axial deviation of wearing and tearing between two output shafts to influence the gear box and normally use, improve the stability of the gear box work for the extruder.

Drawings

Fig. 1 is a schematic structural view of a gear box for embodying the related art.

Fig. 2 is a schematic overall structure of an embodiment of the present application.

Fig. 3 is a schematic structural view of an embodiment of the present application for embodying a first gear.

Reference numerals illustrate: 11. an input shaft; 111 input shaft gears; 12. a long axis; 121. a first long shaft gear; 122. a second long shaft gear; 13. a bridge shaft; 131. a first carrier gear; 132. a second intermediate gear; 14. a short shaft; 141. a stub shaft gear; 2. a case; 21. a transmission shaft; 211. a transmission gear; 22. an output shaft; 221. a second gear; 23. a first gear; 231. external teeth; 232. internal teeth; 233. a support sleeve; 24. a first hole; 25. a first gland; 26. a bearing sleeve; 261. a first cover; 262. a cushion block; 27. a second hole; 28. a second gland; 29. a second cover; 3. a first bearing; 4. a combined thrust bearing; 5. cylindrical roller bearings; 6. an oil pump; 7. an oil seal; 8. an air filter.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses an extruder is with a wheel case.

As shown in fig. 2 and 3, the extruder output wheel box comprises a box body 2, a transmission shaft 21, a first gear 23 and two output shafts 22, wherein the transmission shaft 21 is rotatably connected in the box body 2, the transmission gear 211 is coaxially arranged on the transmission shaft 21, the outer circumference surface of the first gear 23 is provided with external teeth 231, the inner circumference surface of the first gear 23 is provided with internal teeth 232, the first gear 23 is rotatably connected in the box body 2, the external teeth 231 of the first gear 23 are meshed with the transmission gear 211, the two output shafts 22 are parallel to each other, the two output shafts 22 are rotatably connected in the box body 2 and penetrate through the first gear 23, the two output shafts 22 are provided with second gears 221, the two second gears 221 are meshed with the internal teeth 232 of the first gear 23, and a space is reserved between the two second gears 221.

In the use process, the transmission shaft 21 drives the transmission gear 211 to rotate, the transmission gear 211 drives the first gear 23 to rotate, the first gear 23 drives the two second gears 221 to simultaneously rotate, and the two second gears 221 respectively drive the two output shafts 22 to rotate, so that double-screw output of the gear box for the extruder is realized. Because the two output shafts 22 are identical in shape and are positioned in the same transmission stage number, the loads born by the two output shafts 22 are identical, so that the wear degrees of the two output shafts 22 are identical, the situation that axial deviation occurs between the two output shafts 22 to influence the gear box for the extruder to realize double-screw output is reduced, and the use stability of the gear box for the extruder is improved.

As shown in fig. 2, support sleeves 233 are disposed at two ends of the first gear 23 along the axial direction of the first gear, the support sleeves 233 and the first gear 23 are integrally formed, a first bearing 3 respectively matched with the two support sleeves 233 is mounted in the box 2, an outer ring of the first bearing 3 is fixed with an inner wall of the box 2, and an inner ring of the first bearing 3 is sleeved on the support sleeves 233 and is tightly matched with the support sleeves 233.

Two first holes 24 are formed in the box body 2, first pressing covers 25 for positioning the output shaft 22 are embedded in the two first holes 24, the two first pressing covers 25 are connected with the box body 2 through bolts, two ends of the output shaft 22 penetrate out of the two first pressing covers 25 respectively, a bearing sleeve 26 is connected to the side wall of the first pressing cover 25, far away from the output end of the output shaft 22, of the box body 2 through bolts, and one end, far away from the box body 2, of the bearing sleeve 26 is connected with a first sealing cover 261 through bolts.

The bearing sleeve 26 is internally provided with two combined thrust bearings 4, the two combined thrust bearings 4 respectively correspond to the two output shafts 22, one ends of the two output shafts 22 are respectively inserted into the two combined thrust bearings 4 and are respectively in tight fit with inner rings of the two combined thrust bearings 4, a cushion block 262 is arranged between the combined thrust bearings 4 and the first sealing cover 261, and the end face of the outer ring of the combined thrust bearing 4 is tightly abutted against the cushion block 262.

In the use process, the hole on the first gland 25 is matched with the output shaft 22, so that the situation that the radial runout of the output shaft 22 causes that the gear box for the extruder cannot normally operate is reduced. During operation of the gear box for the extruder, the output shafts 22 receive the thrust action of the combined thrust bearing 4, so that the two output shafts 22 can always extend out of the first gland 25 for the same distance, the condition that the two output shafts 22 are axially misplaced is reduced, and the gear box for the extruder can normally operate.

When the output shaft 22 is disassembled, the first sealing cover 261 is separated from the bearing sleeve 26, then the bearing sleeve 26 is separated from the first sealing cover 261, then the first pressing cover 25 is separated from the box body 2, and finally the two output shafts 22 are extracted from the box body 2, so that the mode that the output shaft 22 can be taken out after the whole upper end cover of the traditional gear box is separated from the gear box is replaced, the output shaft 22 is conveniently replaced or maintained after being taken out, and the simplicity of the gear box for the extruder is improved.

A plurality of cylindrical roller bearings 5 are fixed in the box body 2, the transmission shaft 21 passes through the cylindrical roller bearings 5 and is in tight fit with the inner rings of the cylindrical roller bearings 5, a second hole 27 is formed in the box body 2, a second gland 28 for positioning the transmission shaft 21 is embedded in the second hole 27, the input end of the transmission shaft 21 passes through the second gland 28, and the second gland 28 is in bolt connection with the box body 2.

In the use process, the hole of the second gland 28 is matched with the input end of the transmission shaft 21, so that the radial runout of the transmission shaft 21 is reduced, and the working stability of the gear box for the extruder is improved.

As shown in fig. 2, an oil pump 6 is disposed on the box 2, an input end of the oil pump 6 extends into the box 2 and is connected with one end of the transmission shaft 21 far away from the second gland 28, the output ends of the two output shafts 22 and the input end of the transmission shaft 21 are both sleeved with an oil seal 7, the first gland 25 and the second gland 28 are both provided with a second gland 29 for fixing the oil seal 7, the second gland 29 is tightly abutted against the oil seal 7, and an air filter 8 is disposed on the top surface of the box 2.

In the use, when transmission shaft 21 rotates, transmission shaft 21 drives oil pump 6 operation, then oil pump 6 transport lubricating oil in to box 2, and oil blanket 7 and second closing cap 29 reduce the possibility that lubricating oil leaked from output shaft 22's output and transmission shaft 21's input, and air cleaner 8 has reduced the probability that the granule of air got into the gear box for the extruder simultaneously, and then has reduced the probability that the internals abrade and damage, improves the gear box durability for the extruder.

The implementation principle of the embodiment of the application is as follows: the transmission gear 211 on the transmission shaft 21 is meshed with the first gear 23, the first gear 23 is meshed with the second gears 221 of the two output shafts 22, when the transmission shaft 21 rotates, the transmission gear 211 drives the first gear 23 to rotate, and then the first gear 23 drives the two second gears 221 to rotate, so that the double-shaft output of the two output shafts 22 is finally realized, the structure of the gear box for the extruder is simplified through the first gear 23, and meanwhile, the two output shafts 22 are subjected to the same load, so that the abrasion of the two output shafts 22 is the same, the two output shafts 22 can stably carry out double-shaft output, and the stability of the gear box for the extruder in normal use is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A gearbox for an extruder, characterized in that: the novel transmission device comprises a box body (2), a transmission shaft (21) and two output shafts (22), wherein the transmission shaft (21) and the output shafts (22) are rotationally connected in the box body (2), a first gear (23) is rotationally connected to the box body (2), second gears (221) are respectively arranged on the two output shafts (22), a transmission gear (211) is arranged on the transmission shaft (21), and the second gears (221) and the transmission gears (211) are respectively meshed with the first gears (23);

the two output shafts (22) penetrate through the first gear (23), internal teeth (232) for simultaneously meshing with the two second gears (221) are arranged on the inner side wall of the first gear (23), a space is reserved between the two second gears (221), and external teeth (231) for meshing with the transmission gear (211) are arranged on the outer side wall of the first gear (23).

2. A gearbox for an extruder according to claim 1, wherein: the first gear (23) is provided with a support sleeve (233) along two axial ends of the first gear, and a first bearing (3) matched with the support sleeve (233) is arranged in the box body (2).

3. A gearbox for an extruder according to claim 1, wherein: first hole (24) have all been seted up at the both ends of box (2), two all can dismantle on first hole (24) be connected with first gland (25) that are used for fixing a position output shaft (22), can dismantle on first gland (25) and be connected with bearing sleeve (26), the one end that first gland (25) was kept away from to bearing sleeve (26) can be dismantled and be connected with first closing cap (261), install combination thrust bearing (4) in bearing sleeve (26), output shaft (22) are pegged graft at combination thrust bearing (4) inner circle and mutually tight fit.

4. A gearbox for an extruder according to claim 3, characterised in that: a cushion block (262) is arranged in one end, far away from the box body (2), of the bearing sleeve (26), and the end face, far away from the outer ring of the output shaft (22), of the combined thrust bearing (4) is abutted with the cushion block (262).

5. A gearbox for an extruder according to claim 3, characterised in that: the cylindrical roller bearing (5) is arranged in the box body (2), and the transmission shaft (21) penetrates through the inner ring of the cylindrical roller bearing (5) and is in tight fit.

6. A gearbox for an extruder as set forth in claim 5 wherein: the box body (2) is provided with a second hole (27), and a second gland (28) for positioning the transmission shaft (21) is arranged in the second hole (27).

7. A gearbox for an extruder according to claim 1, wherein: the oil pump (6) is arranged on the box body (2), and the oil pump (6) is connected with the transmission shaft (21).

8. A gearbox for an extruder as set forth in claim 6 wherein: the transmission shaft is characterized in that an oil seal (7) is arranged at the input end of the transmission shaft (21) and the output end of the output shaft (22), and a second sealing cover (29) used for fixing the oil seal (7) is arranged on each of the first sealing cover (25) and the second sealing cover (28).

9. A gearbox for an extruder according to claim 1, wherein: an air filter (8) is arranged on the box body (2).