CN218927652U

CN218927652U - Pin puller of screw extruder

Info

Publication number: CN218927652U
Application number: CN202222881003.3U
Authority: CN
Inventors: 许荣浪; 谢宛彤
Original assignee: Guangdong Maohuajian Group Co ltd
Current assignee: Guangdong Maohuajian Group Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-28
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a pin puller of a screw extruder, belongs to the technical field of mechanical tools, and solves the problem of low pulling efficiency of a positioning pin. The key points of the technical scheme are as follows: the electric wrench comprises an electric wrench body, a square sleeve, a shell, an inner screw sleeve, an outer screw sleeve, a worm wheel, a screw rod and a lifting nut; the outer screw sleeve is placed above the locating pin, the lower end of the screw rod is screwed into the inner threaded hole of the locating pin, the square sleeve is sleeved on the square shaft at the end part of the screw rod, the electric wrench is started, the electric wrench drives the screw rod to rotate, the turbine is rotated, the inner screw sleeve rotates relative to the outer screw sleeve, the inner screw sleeve moves upwards while rotating, the inner screw sleeve moves upwards and drives the shell and the lifting nut to move upwards sequentially, so that the screw rod is driven to move upwards, the locating pin is pulled out, and the pulling efficiency of the locating pin is improved.

Description

Pin puller of screw extruder

Technical Field

The utility model relates to the technical field of mechanical tools, in particular to a pin puller of a screw extruder.

Background

At present, the large screw extrusion reduction gearbox is high in maintenance difficulty, high in technical requirement and long in time consumption, so that the reduction gearbox maintenance is a key node, the key of influencing the reduction gearbox maintenance is the extraction of a locating pin during disassembly, and because the diameter of the locating pin is relatively large, the existing manual pin extractor is a tool used purely manually, certain potential safety hazards exist in the use process, the use is relatively laborious and cannot be used for a long time, the extraction efficiency of the locating pin is relatively low, the common pneumatic pin extractor is relatively convenient to use, but an air source is required to be provided during use, the reaction force is large and the potential safety hazard exists, so that the reaction force caused by compression is always taken care of when the locating pin is extracted, and the certain influence is caused on the extraction efficiency of the locating pin.

Disclosure of Invention

The utility model aims to design a pin puller of a screw extruder so as to solve the problem of the background technology. The technical scheme of the utility model is as follows: the utility model provides a screw extruder pin puller, includes screw rod, locating pin, electric spanner and square sleeve thereof, the lower extreme of screw rod with locating pin threaded connection still includes shell, interior swivel nut, outer swivel nut, worm wheel, screw rod and lifting nut, the excircle of interior swivel nut pass through threaded connection in on the hole of outer swivel nut, the top rigid coupling of interior swivel nut in the bottom of worm wheel, one side of worm wheel with the worm meshing, worm rotatable connect in one side of shell, worm wheel rotatable connect in the middle of the interior top of shell, lifting nut has been placed in the middle of the outer top of shell with the upper end threaded connection of screw rod, be equipped with the square shaft on the axle head of worm, the square shaft with the square sleeve meshing, the square sleeve is installed on the electric spanner.

Further, two through holes are formed in the shell, and each through hole is fixedly provided with a flange type bearing seat.

Further, a bearing hole is formed in the flange type bearing seat, a bearing is mounted at the bottom end of the bearing hole, a clamping groove is formed in the bearing hole, a clamping spring is mounted on the clamping groove, and the clamping spring is tightly attached to the outer ring of the bearing.

Further, the two bearing holes are coaxial, and the inner holes of the two bearings are coaxial with the worm.

Further, two ends of the worm are respectively provided with a first step, and one end face of the first step is clung to the bearing inner ring.

Further, the inner top of shell is equipped with first boss, the top middle part of worm wheel is equipped with the second boss, be equipped with first hole on the first boss, be equipped with the second hole on the second boss, first hole and thrust ball bearing's seat ring interference fit, the second hole with thrust ball bearing's pedestal ring interference fit, thrust ball bearing's steel ball holder subassembly place in on the second hole and be located the top of pedestal ring, steel ball holder subassembly with the terminal surface cooperation of seat ring, leave the clearance between first boss with the second boss.

Further, a through hole is formed in the middle of the worm wheel, a gap is reserved between the through hole and the screw rod, and a gap is reserved between the screw rod and inner holes of all components of the thrust ball bearing.

Further, a nut groove is formed in the middle of the outer top of the shell, and the nut groove is matched with the lifting nut.

Further, an optical axis is arranged in the middle of the screw rod, a second step is arranged in the inner threaded sleeve, a threaded inner hole is arranged on the second step, threads of the threaded inner hole are consistent with threads of the lifting nut, and a gap is reserved between the threaded inner hole and the optical axis

Further, a handle is fixedly arranged at the upper end of the screw rod

Compared with the prior art, the utility model has the advantages that:

the utility model adopts a worm and gear type pin pulling mode, and comprises an electric wrench, a square sleeve, a shell, an inner screw sleeve, an outer screw sleeve, a worm gear, a screw rod and a lifting nut; the outer screw sleeve is fixed above the locating pin, the lower end of the screw rod is screwed into the inner threaded hole of the locating pin, the square sleeve is sleeved on the square shaft at the end part of the screw rod, the electric wrench is started, the electric wrench drives the screw rod to rotate, the turbine is rotated, the inner screw sleeve rotates relative to the outer screw sleeve, the inner screw sleeve moves upwards while rotating, the inner screw sleeve moves upwards sequentially to drive the shell and the lifting nut to move upwards, the screw rod is driven to move upwards, the locating pin is pulled out, and the pin puller can replace manual brute force pin pulling during safe operation, so that pin pulling efficiency is improved.

Drawings

FIG. 1 is a schematic isometric cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a front view semi-sectional schematic of the present utility model;

FIG. 3 is a schematic view in partial cross-section of the present utility model;

FIG. 4 is an enlarged partial schematic view of FIG. 3A;

wherein: 1. a screw; 2. lifting the nut; 3. a housing; 31. a first boss; 32. a nut groove; 4. a worm wheel; 41. a second boss; 5. an inner screw sleeve; 51. a second step; 6. an outer screw sleeve; 7. a positioning pin; 71. an upper plate; 72. a lower plate; 8. a worm; 81. a square shaft; 82. a flange type bearing seat; 83. a first step; 84. a bearing; 85. clamping springs; 9. a thrust ball bearing; 91. a seat ring; 92. a steel ball retainer assembly; 93. a shaft collar; 10. a handle; 11. an optical axis.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1 and 2, a pin puller of a screw extruder comprises a screw 1, a positioning pin 7, an electric wrench and square sleeves thereof, wherein the lower end of the screw 1 is in threaded connection with the positioning pin 7, the pin puller further comprises a shell 3, an inner threaded sleeve 5, an outer threaded sleeve 6, a worm 8, a worm wheel 4, the screw 1 and a lifting nut 2, the outer circle of the inner threaded sleeve 5 is in threaded connection with an inner hole of the outer threaded sleeve 6, the top of the inner threaded sleeve 5 is fixedly connected to the bottom of the worm wheel 4, one side of the worm wheel 4 is meshed with the worm 8, the worm 8 is rotatably connected to one side of the shell 3, the worm wheel 4 is rotatably connected to the middle of the inner top of the shell 3, the lifting nut 2 is placed in the middle of the outer top of the shell 3, the lifting nut 2 is in threaded connection with the upper end of the screw 1, a square shaft 81 is arranged on the shaft end of the worm 8, the square shaft (81) is meshed with the square sleeve, and the square sleeve is mounted on the electric wrench; the outer screw sleeve 5 is placed above the locating pin 7, the lower end of the screw 4 is screwed into an inner threaded hole of the locating pin 7, then the square sleeve is sleeved on the square shaft 81 at the end part of the worm 8, an electric wrench is started, the electric wrench drives the worm 8 to rotate, the turbine 4 rotates, the inner screw sleeve 5 rotates relative to the outer screw sleeve 6, the inner screw sleeve 5 moves upwards while rotating, meanwhile, the inner screw sleeve 5 moves upwards, the shell 3 and the lifting nut 2 are sequentially driven to move upwards by the upward movement of the inner screw sleeve 5, the screw 1 is driven to move upwards by the lifting nut 2, and the locating pin 7 is pulled out. In addition, by designing the two square shafts 81, the electric wrench can be used more conveniently, and the flexibility of the pin puller is improved.

The inner top of the shell 3 is provided with a first boss 31, the middle part of the top end of the worm wheel 4 is provided with a second boss 41, the first boss 31 is provided with a first inner hole, the second boss 41 is provided with a second inner hole, the first inner hole is in interference fit with a seat ring 91 of the thrust ball bearing 9, the second inner hole is in interference fit with a shaft ring 93 of the thrust ball bearing 9, a steel ball retainer assembly 92 of the thrust ball bearing 9 is arranged on the second inner hole and is positioned above the shaft ring 93, the steel ball retainer assembly 93 is matched with the end surface of the seat ring 91, and a gap is reserved between the first boss 31 and the second boss 41; when the worm wheel 4 rotates, the shaft collar 93 is driven to rotate, and the steel ball retainer assembly 92 and the seat ring 91 are arranged, so that the worm wheel 4 cannot rotate the shell 3 in the rotation process, the worm wheel 4 rotates, the shell 3 does not rotate, the electric wrench is more convenient to operate, the parts are more tightly in the rotation process due to the interference fit design, and the pin puller is more stable.

A nut groove 32 is formed in the middle of the outer top of the shell 3, and the nut groove 32 is matched with the lifting nut 2; the design of the nut groove 32 firstly can stop the rotation of the lifting nut 2, the up-and-down movement of the screw 1 can be realized only by rotating the screw 1, and secondly, the lifting nut 2 is easy to damage because the lifting nut 2 belongs to a stressed part, and when the lifting nut is damaged, the lifting nut 2 can be replaced only by being taken out of the nut groove 32, so that the flexibility of the pin puller is improved.

Referring to fig. 2, a section of optical axis 11 is arranged in the middle of the screw 1, a second step 51 is arranged in the inner screw sleeve 5, a threaded inner hole is arranged on the second step 51, threads of the threaded inner hole are consistent with threads of the lifting nut 2, and a gap is reserved between the threaded inner hole and the optical axis 11; the optical axis 11 divides the screw thread on the screw 1 into an upper end screw thread and a lower end screw thread, when the pin puller does not work, the upper end screw thread on the screw 1 is meshed with the lifting nut 2, and the lower end screw thread on the screw 1 is meshed with the inner hole screw thread of the second step 51, so that the whole pin puller can be kept compact when the pin puller does not work, namely, dislocation does not occur between the steel ball retainer assembly 92 of the thrust ball bearing 9 and the seat ring 91, and the pin puller is difficult to operate; when the screw rod 1 needs to work, the end threads at the lower end of the screw rod 1 are aligned with the inner hole threads of the positioning pin 7, the screw rod 1 is rotated, so that the lower part of the lower end threads of the screw rod 1 starts to enter the positioning pin 7, the upper part of the lower end threads starts to leave the inner hole threads of the second step 51, when the lower part of the lower end threads of the screw rod 1 fully enter the positioning pin 7, the upper part of the lower end threads of the screw rod thoroughly leaves the inner hole threads of the second step 51, namely, the optical axis 11 is positioned in the inner hole threads of the second step 51, and a gap exists between the two, when the worm starts to rotate, only the lifting nut 2 is stressed, and the inner hole threads of the second step 51 are not stressed. Meanwhile, a limiting mechanism can be arranged between the worm wheel 4 and the outer threaded sleeve 6, when the worm wheel 4 rises to a certain position, the worm wheel 4 stops rising, at the moment, the locating pin 7 is completely separated from the lower plate 72, but the locating pin 7 is still arranged on the upper plate 71, and at the moment, the screw rod 1 is rotated, so that the lower part of the lower end thread of the screw rod 1 is separated from the locating pin 7, and then the upper part of the lower end thread of the screw rod 1 is screwed into the inner hole thread of the second step 51, namely, the optical axis 11 is positioned above the second step 51.

A handle 10 is fixedly arranged at the upper end of the screw 1; thereby facilitating the rotation of the operating screw 1.

The middle part of the worm wheel 4 is provided with a through hole, a gap is reserved between the through hole and the screw 1, and a gap is reserved between the screw 1 and the inner holes of all components of the thrust ball bearing 9; this design ensures that the screw 1 will not affect the internal parts of the pin puller when moving up and down.

Referring to fig. 3, two through holes are formed in the housing 3, each through hole is fixedly provided with a flange bearing seat 82, the flange bearing seat 82 can ensure that the worm 8 is fixed inside the housing 3, and the flange can be connected with the housing through bolts or welded.

The flange bearing seat 82 is provided with a bearing hole, the bottom end of the bearing hole is provided with a bearing 84, the bearing hole is provided with a clamping groove, the clamping groove is provided with a clamping spring 85, and the clamping spring 85 is clung to the outer ring of the bearing 84; the design of this scheme has effectively guaranteed the rotation of worm 8 inside shell 3.

The two bearing holes are coaxial and the inner holes of the two bearings 84 are coaxial with the worm 8; the rotation precision of the worm 8 can be improved, and the locking between the worm 8 and the bearing 84 is effectively prevented.

The two ends of the worm 8 are respectively provided with a first step 83, and one end surface of the first step 83 is clung to the inner ring of the bearing 84; this scheme can guarantee that worm 8 can not break away from the shell inside because of axial displacement at pivoted in-process, makes worm 8 can stable rotation.

Description of the working mode of the utility model:

when the pin puller does not work, the upper end thread on the screw rod 1 is meshed with the lifting nut 2, the lower end thread on the screw rod 1 is meshed with the inner hole thread of the second step 51, when the pin puller needs to work, the end thread on the lower end of the screw rod 1 is aligned with the inner hole thread of the positioning pin 7, the handle 10 is rotated, so that the lower part of the lower end thread of the screw rod 1 starts to enter the positioning pin 7, the upper part of the lower end thread starts to leave the inner hole thread of the second step 51, when the lower part of the lower end thread of the screw rod 1 fully enters the positioning pin 7, the upper part of the lower end thread of the screw rod 1 completely leaves the inner hole thread of the second step 51, at the moment, the square sleeve is sleeved on the square shaft 81, and the electric spanner is started, the electric spanner drives the worm 8 to rotate, so that the turbine 4 rotates, the inner screw sleeve 5 rotates relative to the outer screw sleeve 6, the inner screw sleeve 5 moves upwards while rotating, the shell 3 and the lifting nut 2 are sequentially driven to move upwards by the upward movement of the inner screw sleeve 5, the lifting nut 2 drives the screw 1 to move upwards, the positioning pin 7 is pulled out of the lower plate 72, the positioning pin 7 is further embedded on the upper plate 71, at the moment, the handle 10 is rotated, the lower part of the lower end thread of the screw 1 is separated from the positioning pin 7, the upper part of the lower end thread of the screw 1 is screwed into the inner hole thread of the second step 51, and then the pin pulling is completed, and the next positioning pin is pulled out. As a result, the design of the pin puller greatly improves the pulling efficiency of the locating pin 7.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper," "lower," "left," "right," "front," "back," and the like are used herein for illustrative purposes only.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. The utility model provides a screw extruder pin puller, includes screw rod (1), locating pin (7), electric spanner and square sleeve thereof, the lower extreme of screw rod (1) with locating pin (7) threaded connection, its characterized in that still includes shell (3), interior swivel nut (5), outer swivel nut (6), worm (8), worm wheel (4) and lifting nut (2), the excircle of interior swivel nut (5) pass through threaded connection in on the hole of outer swivel nut (6), the top rigid coupling of interior swivel nut (5) in the bottom of worm wheel (4), one side of worm wheel (4) with worm (8) meshing, worm wheel (8) rotatable coupling in one side of shell (3), worm wheel (4) rotatable coupling in the middle of the interior top of shell (3), lifting nut (2) have been placed in the middle of the outer top of shell (3), lifting nut (2) with the upper end threaded connection of screw rod (1), be equipped with on the axle head (8) four-axis, square sleeve (81) are in the installation.

2. The screw extruder pin puller of claim 1, wherein: two through holes are formed in the shell (3), and each through hole is fixedly provided with a flange type bearing seat (82).

3. The screw extruder pin puller of claim 2, wherein: the flange type bearing seat (82) is provided with a bearing hole, the bottom end of the bearing hole is provided with a bearing (84), the bearing hole is provided with a clamping groove, the clamping groove is provided with a clamp spring (85), and the clamp spring (85) is tightly attached to the outer ring of the bearing (84).

4. A screw extruder pin puller as set forth in claim 3 wherein: the two bearing holes are coaxial, and the inner holes of the two bearings (84) are coaxial with the worm (8).

5. A screw extruder pin puller as set forth in claim 3 wherein: the two ends of the worm (8) are respectively provided with a first step (83), and one end face of the first step (83) is clung to the inner ring of the bearing (84).

6. The screw extruder pin puller of claim 1, wherein: the utility model discloses a ball bearing, including shell (3), worm wheel (4), first boss (31) are equipped with at the interior top of shell (3), top middle part of worm wheel (4) is equipped with second boss (41), be equipped with first hole on first boss (31), be equipped with the second hole on second boss (41), first hole and thrust ball bearing's (9) seat ring (91) interference fit, the second hole with thrust ball bearing's (9) pedestal (93) interference fit, thrust ball bearing's (9) steel ball holder subassembly (92) place in on the second hole and be located the top of pedestal (93), steel ball holder subassembly (92) with the terminal surface cooperation of seat ring (91), first boss (31) with leave the clearance between second boss (41).

7. The screw extruder pin puller of claim 6, wherein: the middle part of the worm wheel (4) is provided with a through hole, a gap is reserved between the through hole and the screw rod (1), and a gap is reserved between the screw rod (1) and the inner hole of each component of the thrust ball bearing (9).

8. The screw extruder pin puller of claim 1, wherein: a nut groove (32) is formed in the middle of the outer top of the shell (3), and the nut groove (32) is matched with the lifting nut (2).

9. The screw extruder pin puller of claim 1, wherein: the middle part of screw rod (1) is equipped with one section optical axis (11), the inside of interior swivel nut (5) is equipped with second step (51), be equipped with the screw thread hole on second step (51), the screw thread of screw thread hole with the screw thread of lifting nut (2) is unanimous, the screw thread hole with leave the clearance between optical axis (11).

10. The screw extruder pin puller of claim 1, wherein: a handle (10) is fixedly arranged at the upper end of the screw rod (1).