CN220523042U

CN220523042U - Tiny dabber

Info

Publication number: CN220523042U
Application number: CN202321847822.4U
Authority: CN
Inventors: 罗正全; 杨皎珩
Original assignee: Chengdu Nanxiang Qiaolin Machinery Co ltd
Current assignee: Chengdu Nanxiang Qiaolin Machinery Co ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-02-23
Anticipated expiration: 2033-07-14

Abstract

The utility model relates to the technical field of experimental double-screw extruder ultra-small threaded elements, in particular to a small mandrel. The novel connecting rod comprises a core body, an inner bolt and a shaft sleeve, wherein the middle part of the shaft sleeve is provided with mounting holes penetrating through two ends, one ends of the inner bolt and the core body are respectively inserted into the mounting holes from two ends of the shaft sleeve, and the inner bolt and the core body are connected in the mounting holes through springs. 1. The production difficulty is reduced, and the core body part can be processed by the medium wire by adopting the superhard round rod due to the split combination, so that the super-hard round rod has high hardness and good quality, the service life is greatly prolonged, and the service life is prolonged by more than 4 times compared with that of the traditional integral type; 2. the shaft sleeve can be reused, even if the core body is deformed, the shaft sleeve can be reused by changing the core body, so that the cost is saved; 3. the split design can adjust the length of the core body, and the processing convenience is maximized; 4. the internal spring body can effectively avoid the deformation of the thimble hole caused by overlarge moment of the thimble.

Description

Tiny dabber

Technical Field

The utility model relates to the technical field of experimental double-screw extruder ultra-small threaded elements, in particular to a small mandrel.

Background

The mandrel is an auxiliary tool for processing the threaded element of the extruder, and as the threaded element is provided with an internal spline, the threaded element cannot be processed by threading the mandrel (also because the appearance of the element has a phase requirement with the initial angle of the spline), the ultra-small threaded element is generally used for a double-screw extrusion experimental machine, the general external diameter is below 20mm, the bottom diameter is below 15mm, and the general diameter of the spline at the center is below 10 mm.

The existing ultra-small mandrel production is also carried out according to the conventional mandrel processing steps, but the diameter is small, the processing difficulty is high, the cost is high, and the ultra-small mandrel is extremely easy to deform in the use process (the deformation cannot be avoided), so that the use time of the general integral type small mandrel is not long.

Disclosure of Invention

The utility model aims to provide a tiny mandrel, which solves the problems that most of ultra-tiny mandrels are integrally arranged, the length of the mandrel is inconvenient to adjust, the mandrel can only be customized and processed, and the applicability is poor in the prior art.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a tiny core shaft comprises a core body, an inner bolt and a shaft sleeve, wherein the middle part of the shaft sleeve is provided with mounting holes penetrating through two ends, one ends of the inner bolt and the core body are respectively inserted into the mounting holes from two ends of the shaft sleeve, and the inner bolt and one end of the core body are connected in the mounting holes through springs.

The inner bolt is connected with the mounting hole in a threaded connection mode, an external thread is arranged on the outer wall of the surrounding inner bolt, an internal thread matched with the inner bolt is arranged on the inner wall of the surrounding mounting hole, and the external thread is matched with the internal thread in a threaded connection mode when the inner bolt is mounted in the mounting hole.

The core body is installed in the installation hole through the screw, a threaded hole communicated with the installation hole is formed in the outer wall of the shaft sleeve, the screw is installed in the threaded hole in a threaded matching mode, and when the core body is installed in the installation hole, the screw is in contact with the outer wall of the core body in a propping mode, and the screw is connected with the outer wall of the core body.

According to a further technical scheme, a plurality of threaded holes and screws are arranged around the outer wall of the shaft sleeve.

The further technical scheme is that the screw is an inner hexagon screw.

The further technical scheme is that one end of the inner bolt, which is far away from the spring, is provided with an inner hexagonal groove.

The further technical scheme is that the outer wall of the core body is provided with clamping grooves along the length direction of the outer wall of the core body, and the clamping grooves encircle the outer wall of the core body and are provided with a plurality of clamping grooves.

The further technical scheme is that the outer wall of one end of the core body far away from the shaft sleeve is provided with connecting threads.

The further technical proposal is that the shaft sleeve is cylindrical, and the outer wall of the shaft sleeve facing one end of the core body inclines towards the mounting hole to form a round table surface

Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. the production difficulty is reduced, and the core body part can be processed by the medium wire by adopting the superhard round rod due to the split combination, so that the super-hard round rod has high hardness and good quality, the service life is greatly prolonged, and the service life is prolonged by more than 4 times compared with that of the traditional integral type; 2. the shaft sleeve can be reused, even if the core body is deformed, the shaft sleeve can be reused by changing the core body, so that the cost is saved; 3. the split design can adjust the length of the core body, and the processing convenience is maximized; 4. the internal spring body can effectively avoid the deformation of the thimble hole caused by overlarge moment of the thimble.

Drawings

Fig. 1 is a schematic view of a prior art fine mandrel.

Fig. 2 is an overall schematic view of a fine mandrel according to the present utility model.

Fig. 3 is a schematic side view of a slim mandrel of the present utility model without a sleeve.

Fig. 4 is a schematic view of a core part of a fine mandrel according to the present utility model.

Icon: 1-core body, 2-internal bolt, 3-axle sleeve, 4-mounting hole, 5-spring, 6-external screw thread, 7-screw, 8-screw hole, 9-hexagonal recess, 10-draw-in groove, 11-connecting screw thread, 12-circle mesa.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Fig. 2 to 4 show an embodiment of the present utility model.

Example 1:

as shown in fig. 1 and 2, a small mandrel comprises a core body 1, an inner bolt 2 and a shaft sleeve 3, wherein a mounting hole 4 penetrating through two ends is formed in the middle of the shaft sleeve 3, one ends of the inner bolt 2 and the core body 1 are respectively inserted into the mounting hole 4 from two ends of the shaft sleeve 3, and the inner bolt 2 and the core body are connected in the mounting hole 4 through a spring 5. In the prior art, basically, the small core shafts are integrally formed, as shown in fig. 1, the machining difficulty is increased because of the large hardness of materials and more parts to be machined, and the split type combination of the utility model has the advantages that the core body 1 part can be formed by machining the superhard round rod through the medium wire, the hardness is high, the quality is good, the service time is greatly prolonged, and the service life is prolonged by more than 4 times compared with that of the traditional integral type. The shaft sleeve 3 can be reused, even if the core body 1 is deformed, the core body 1 can be replaced for reuse, and the cost is saved. The split type design, core 1 length can be adjusted, maximize processing convenience. The internal spring 5 body can effectively avoid the deformation of the thimble hole caused by overlarge moment of the thimble.

The inner bolt 2 is connected with the mounting hole 4 in a threaded connection mode, an external thread 6 is arranged on the outer wall of the surrounding inner bolt 2, an internal thread matched with the inner bolt 2 is arranged on the inner wall of the surrounding mounting hole 4, and when the inner bolt 2 is mounted in the mounting hole 4, the external thread 6 is matched with the internal thread in a threaded connection mode. Through the mode of setting up through screw thread matching connection between interior bolt 2 and the mounting hole 4, can make the stable installation of interior bolt 2 in mounting hole 4 on the one hand, can also play fine supporting role to mounting hole 4 simultaneously, when core 1 is adjusting the length, through screwing interior bolt 2, make it can cooperate the length of core 1 in mounting hole 4, can make spring 5 keep certain compression like this.

The core body 1 is installed in the mounting hole 4 through the screw 7, be provided with the screw hole 8 that is linked together with the mounting hole 4 on the outer wall of axle sleeve 3, screw 7 is installed in the screw hole 8 internal thread matching, when the core body 1 is installed in the mounting hole 4, and screw 7 and the outer wall top of core body 1 touch and link to each other. Through setting up screw hole 8 and screw 7, can be in the internal regulation of the core 1 of being convenient for at mounting hole 4 to the length outside the mounting hole 4 is arranged in to control core 1, after adjusting length, through tightening screw 7, makes screw 7 jack the outer wall of core 1, thereby plays the fixed action to core 1.

The threaded holes 8 and the screws 7 are provided in several numbers around the outer wall of the sleeve 3. By arranging a plurality of screws 7, the outer wall of the core body 1 can be uniformly fixed.

The screw 7 is a socket head cap screw 7.

Example 2:

on the basis of embodiment 1, the end of the inner bolt 2 remote from the spring 5 is provided with an inner hexagonal recess 9. By providing the internal hexagonal groove 9, the length of the internal bolt 2 in the mounting hole 4 can be adjusted by an internal hexagonal wrench, and the external diameter of the whole internal bolt 2 can be always made by opening the internal hexagonal groove 9.

The outer wall of the core body 1 is provided with a clamping groove 10 along the length direction, and the clamping groove 10 surrounds the outer wall of the core body 1 and is provided with a plurality of clamping grooves. By providing the clamping groove 10, the thread bush can be installed, so that the thread bush is driven to rotate for extrusion operation.

As shown in fig. 3, the outer wall of the end of the core 1 remote from the sleeve 3 is provided with a connecting thread 11. By arranging the connecting screw 11, the screw extruder is convenient to install with an experimental double-screw extruder.

The shaft sleeve 3 is cylindrical, and the outer wall of one end of the shaft sleeve 3 facing the core body 1 is inclined towards the mounting hole 4 to form a round table top 12.

Although the utility model has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, drawings and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.

Claims

1. The utility model provides a tiny dabber, its characterized in that includes core (1), interior bolt (2) and axle sleeve (3), the middle part of axle sleeve (3) is provided with mounting hole (4) at link up both ends, the one end of interior bolt (2) and core (1) inserts respectively from the both ends of axle sleeve (3) in mounting hole (4) to link to each other through spring (5) in mounting hole (4).

2. A slim mandrel as claimed in claim 1, wherein: the internal bolt (2) is connected with the mounting hole (4) through a mode of thread connection, external threads (6) are arranged on the outer wall of the internal bolt (2) in a surrounding mode, internal threads matched with the internal bolt (2) are arranged on the inner wall of the mounting hole (4) in a surrounding mode, and when the internal bolt (2) is mounted in the mounting hole (4), the external threads (6) are connected with the internal threads in a thread matching mode.

3. A slim mandrel as claimed in claim 1, wherein: the novel plastic core is characterized in that the core body (1) is mounted in the mounting hole (4) through a screw (7), a threaded hole (8) communicated with the mounting hole (4) is formed in the outer wall of the shaft sleeve (3), the screw (7) is mounted in the threaded hole (8) in a matched mode, and when the core body (1) is mounted in the mounting hole (4), the screw (7) is in contact with the outer wall of the core body (1) in a propping mode.

4. A slim mandrel as claimed in claim 3, wherein: the threaded holes (8) and the screws (7) are arranged around the outer wall of the shaft sleeve (3) in a plurality.

5. A slim mandrel as claimed in claim 4, wherein: the screw (7) is an inner hexagon screw (7).

6. A slim mandrel as claimed in claim 1, wherein: one end of the inner bolt (2) far away from the spring (5) is provided with an inner hexagonal groove (9).

7. A slim mandrel as claimed in claim 1, wherein: the outer wall of the core body (1) is provided with clamping grooves (10) along the length direction of the outer wall, and the clamping grooves (10) encircle the outer wall of the core body (1) to be provided with a plurality of clamping grooves.

8. A slim mandrel as claimed in claim 1, wherein: the outer wall of one end of the core body (1) far away from the shaft sleeve (3) is provided with a connecting thread (11).

9. A slim mandrel as claimed in claim 1, wherein: the shaft sleeve (3) is cylindrical, and the outer wall of one end of the shaft sleeve (3) facing the core body (1) is inclined towards the mounting hole (4) to form a round table top (12).