A pin puller for quick removal of extruder pins

Abstract

The utility model relates to a kind of pin pulling device for quickly removing extruder pin. The pin pulling device includes length control bolt;Pin fixing bolt is equipped at the top end of length control bolt;The pin fixing bolt can be threadedly matched with the extruder pin to be removed;Pin positioning sleeve is sleeved outside length control bolt;The pin positioning sleeve is threadedly matched with length control bolt;Ratchet wrench is sleeved outside pin positioning sleeve, for driving pin positioning sleeve rotation and then driving length control bolt to pull out the extruder pin at top end. Compared with prior art, the pin pulling device of the utility model can realize the quick removal of extruder pin in narrow space.

Description

Technical Field

[0001] This utility model relates to the field of tire processing technology, and in particular to a pin-removing device for quickly removing extruder pins. Background Technology

[0002] An extruder is a commonly used extrusion equipment in the tire manufacturing industry. It mainly consists of a die head, gearbox, screw, barrel, and pins. The pins are installed on the barrel and extend into the barrel. They interact with the rotating screw to generate continuous shearing force on the internal rubber compound, thereby uniformly mixing the rubber compound to meet the process requirements. On the other hand, through the continuous shearing of the pins, the molecular chains inside the rubber compound are changed, so that the rubber compound achieves the expected performance.

[0003] Extruder screws require frequent inspection and replacement. To improve extruder maintenance efficiency and facilitate rapid follow-up work, quickly removing extruder pins is a crucial task. However, an extruder often requires 100-120 pins, and due to the combined use of extruders, some pin spaces are too narrow to be removed using conventional tools, resulting in low removal efficiency. Furthermore, the heat and flow of the rubber compound within the extruder can increase the gaps in some pin holes, leading to material accumulation and making it difficult to quickly remove the pins from these holes.

[0004] Therefore, there is an urgent need to develop a new pin-removing device that can quickly remove extruder pins. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the difficulty in removing pins from the extruder body, and to provide a pin-removing device for quickly removing extruder pins.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] This utility model provides a pin-removing device for quickly removing extruder pins, comprising:

[0008] Length control bolt;

[0009] A pin fixing bolt is provided at the top of the length control bolt; the pin fixing bolt can be threaded with the extruder pin to be removed;

[0010] A pin positioning sleeve is fitted onto the outside of the length control bolt; the pin positioning sleeve is threadedly engaged with the length control bolt.

[0011] A ratchet wrench fitted on the outside of the pin positioning sleeve is used to drive the pin positioning sleeve to rotate, thereby driving the length control bolt to pull out the extruder pin at the top.

[0012] Furthermore, the length control bolt includes a threaded section and a rotating handle.

[0013] Furthermore, the rotating handle is located at the end of the threaded section away from the pin fixing bolt.

[0014] Furthermore, the external thread of the pin fixing bolt engages with the internal thread of the extruder pin.

[0015] Furthermore, the pin fixing bolt and the length control bolt are coaxially arranged.

[0016] Furthermore, the diameter of the pin fixing bolt is smaller than that of the length control bolt.

[0017] Furthermore, the pin positioning sleeve includes a positioning part, a sleeve part, and a tail part arranged coaxially in sequence.

[0018] Furthermore, the inner thread of the pin positioning sleeve can mate with the outer thread of the length control bolt.

[0019] Furthermore, the positioning part, the sleeve part, and the tail part are integrally connected.

[0020] Furthermore, the outer diameters of both the positioning part and the tail are larger than those of the sleeve part.

[0021] Furthermore, the middle section of the socket is a hexagonal columnar structure, and the ratchet wrench has a hexagonal inner contour that can cooperate with the outer contour of the hexagonal columnar structure.

[0022] Furthermore, the ratchet wrench includes a wrench body, which includes a handle and a receiving space disposed at the head of the handle.

[0023] Furthermore, the wrench body has a ratchet that can be installed in conjunction with the pin positioning sleeve, and a shift fork that can contact the ratchet and is used to adjust the ratchet's direction.

[0024] Furthermore, the ratchet includes a hollow cylindrical spacer and a ring of ratchet teeth arranged around the outer surface of the hollow cylindrical spacer.

[0025] Furthermore, the inner surface of the hollow cylindrical spacer is a hexagonal inner contour that can be adapted to the pin positioning sleeve.

[0026] Furthermore, the shift fork is rotatably disposed within the wrench body.

[0027] Furthermore, the front end face of the shift fork is symmetrically provided with engaging protrusions along the axial direction of the wrench body, which can contact the ratchet teeth of the ratchet.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The pin-pulling device of this utility model can position and connect the extruder pins on the extruder body by means of the cooperation of the length control bolt and the pin fixing bolt, and drive the length control bolt to pull the extruder pins out of the extruder body by means of the cooperation of the pin positioning sleeve and the ratchet wrench, thus realizing the rapid removal of the extruder pins in a narrow space.

[0030] (2) The pin removal device of this utility model has a compact structure, which can remove the pin in narrow and difficult working places, and easily and effortlessly remove the pin from the pin hole of the extruder with a ratchet wrench, and can clean up the accumulated rubber material, thereby improving maintenance efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the pin-pulling device of this utility model.

[0032] Figure 2 This is a schematic diagram of the working state of the pin-pulling device of this utility model.

[0033] Figure 3 This is a schematic diagram of the length control bolt and pin fixing bolt of Embodiment 2 of this utility model.

[0034] Figure 4 This is a schematic diagram of the structure of the length control bolt and the pin positioning sleeve in Embodiment 2 of this utility model.

[0035] Figure 5 This is an exploded view of the ratchet wrench of Embodiment 3 of this utility model.

[0036] Figure 6 This is a top cross-sectional view of the ratchet wrench of Embodiment 3 of this utility model.

[0037] Figure 7 This is a side cross-sectional view of the ratchet wrench of Embodiment 3 of this utility model.

[0038] Explanation of markings in the diagram:

[0039] 1-Length control bolt, 11-Threaded section, 12-Rotating handle;

[0040] 2- Pin fixing bolt;

[0041] 3-Pin positioning sleeve, 31-Positioning part, 32-Sleeve part, 33-Tail part;

[0042] 4-Ratchet wrench, 41-Wrench body, 411-Handle, 412-Accommodation space, 42-Ratchet, 421-Hollow cylindrical spacer, 422-Ratchet tooth, 43-Shift fork, 431-Snap-fit ​​protrusion, 44-Spring ball;

[0043] 5-Extruder pin;

[0044] 6-Extruder body. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0046] In this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] Example 1:

[0049] This embodiment provides a pin-removing device for quickly removing extruder pins. For example... Figure 1 As shown, the pin-pulling device in this embodiment includes a length control bolt 1, a pin fixing bolt 2, a pin positioning sleeve 3, and a ratchet wrench 4.

[0050] In this embodiment, the pin fixing bolt 2 is located at the top of the length control bolt 1, and the pin fixing bolt 2 can be threadedly engaged with the extruder pin 5 to be removed.

[0051] In this embodiment, the pin positioning sleeve 3 is sleeved on the outside of the length control bolt 1, and the pin positioning sleeve 3 is threadedly engaged with the length control bolt 1.

[0052] In this embodiment, the ratchet wrench 4 is sleeved on the outside of the pin positioning sleeve 3, and is used to drive the pin positioning sleeve 3 to rotate, thereby driving the length control bolt 1 to pull out the extruder pin 5 at the top. The ratchet wrench 4 can be a conventional commercially available ratchet wrench 4.

[0053] like Figure 2 As shown, the working principle of the pin-pulling device in this embodiment is as follows:

[0054] When it is necessary to remove the extruder pin 5 installed on the extruder body 6, first align the length control bolt 1 and the pin fixing bolt 2 with the extruder pin 5. Then, rotate the length control bolt 1 to extend it from the top of the pin positioning sleeve 3, thereby driving the pin fixing bolt 2 at its top to engage with the threaded connection of the extruder pin 5, thus positioning and fixing the extruder pin 5. Rotate the ratchet wrench 4 to bring the pin positioning sleeve 3 into contact with the extruder body 6, and continue rotating the ratchet wrench 4 to drive the length control bolt 1 to move outward along the thread, ultimately removing the extruder pin 5 from the extruder body 6.

[0055] Example 2:

[0056] This embodiment provides a pin-removing device for quickly removing extruder pins. The pin-removing device includes a length control bolt 1, a pin-fixing bolt 2, a pin-positioning sleeve 3, and a ratchet wrench 4.

[0057] The difference from Example 1 is that, as Figure 3-4 As shown, the length control bolt 1 in this embodiment includes a threaded section 11 and a rotating handle 12. The rotating handle 12 is located at the end of the threaded section 11 away from the pin fixing bolt 2. The operator can drive the pin fixing bolt 2 at the top of the length control bolt 1 to engage with the extruder pin 5 by operating the rotating handle 12.

[0058] In this embodiment, the external thread of the pin fixing bolt 2 mates with the internal thread of the extruder pin 5 to position and connect the extruder pin 5. The pin fixing bolt 2 and the length control bolt 1 are coaxially arranged, and the diameter of the pin fixing bolt 2 is smaller than that of the length control bolt 1.

[0059] In this embodiment, the inner thread of the pin positioning sleeve 3 can mate with the external thread of the length control bolt 1. Specifically, the pin positioning sleeve 3 includes a positioning part 31, a sleeve part 32, and a tail part 33, which are coaxially arranged and integrally connected in sequence. The outer diameters of the positioning part 31 and the tail part 33 are both larger than that of the sleeve part 32, so that the positioning part 31 can abut against the extruder body 6. The middle section of the sleeve part 32 is a hexagonal columnar structure, and the ratchet wrench 4 is provided with a hexagonal inner contour that can mate with the outer contour of the hexagonal columnar structure, facilitating the connection between the two.

[0060] Example 3:

[0061] This embodiment provides a pin-removing device for quickly removing extruder pins. The pin-removing device includes a length control bolt 1, a pin-fixing bolt 2, a pin-positioning sleeve 3, and a ratchet wrench 4.

[0062] The difference from Embodiment 2 is that this embodiment provides a specific structure for a ratchet wrench 4. For example... Figure 5-7 As shown, the ratchet wrench 4 in this embodiment includes a wrench body 41, which includes a handle 411 and a receiving space 412 located at the head of the handle 411. The receiving space 412 of the wrench body 41 is provided with a ratchet 42 that can be installed in conjunction with the pin positioning sleeve 3, and a shift fork 43 that can contact the ratchet 42 and is used to adjust the direction of the ratchet 42.

[0063] The ratchet 42 in this embodiment includes a hollow cylindrical spacer 421 and a ring of ratchet teeth 422 arranged around the outer surface of the hollow cylindrical spacer 421. The inner surface of the hollow cylindrical spacer 421 is a hexagonal inner contour that can be adapted to the pin positioning sleeve 3.

[0064] In this embodiment, the shift fork 43 is rotatably mounted within the wrench body 41 via a pivot. The front end face of the shift fork 43 is symmetrically provided with engaging protrusions 431 along the axial direction of the wrench body 41, which can contact the ratchet teeth 422 of the ratchet 42. The rotation direction of the ratchet 42 can be switched by shifting the shift fork 43. The wrench body 41 in this embodiment also contains a spring bead 44. One end of the spring bead 44 abuts against the inner wall of the wrench body 41, and the other end of the spring is connected to a ball that abuts against the shift fork 43, thereby enabling the shift fork 43 to contact the ratchet teeth 422 of the ratchet 42. This embodiment, through the aforementioned ratchet wrench 4 configuration, allows the shift fork 43 to switch the rotation direction of the ratchet 42, adapting to different scenarios for rapid removal of the extruder pin 5 and improving the removal efficiency of the extruder pin 5.

[0065] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A pin puller for quick removal of an extruder pin, characterized in that, The utility model relates to a length control bolt (1) for extruder pin (5) removal, comprising: a pin fixing bolt (2) arranged at the top end of the length control bolt (1), which can be screwed with the extruder pin (5) to be removed; a pin positioning sleeve (3) sleeved outside the length control bolt (1), which is screwed with the length control bolt (1); a ratchet wrench (4) sleeved outside the pin positioning sleeve (3) to drive the pin positioning sleeve (3) to rotate and drive the length control bolt (1) to pull out the extruder pin (5) at the top end. The length control bolt (1) comprises a threaded section (11) and a rotating handle (12).

2. A pin extractor for quick removal of an extruder pin according to claim 1, characterized in that The rotating handle (12) is located at the end of the threaded section (11) away from the pin fixing bolt (2). The outer thread of the pin fixing bolt (2) matches the inner thread of the extruder pin (5).

3. A pin extractor for quick removal of an extruder pin as defined in claim 1, wherein The pin fixing bolt (2) is coaxially arranged with the length control bolt (1).

4. A pin extractor for quick removal of an extruder pin as defined in claim 1, wherein The diameter of the pin fixing bolt (2) is smaller than that of the length control bolt (1). The pin positioning sleeve (3) comprises a positioning part (31), a sleeve part (32) and a tail part (33) arranged coaxially in sequence.

5. A pin puller for quick removal of an extruder pin as defined in claim 1, wherein, The inner wall thread of the pin positioning sleeve (3) matches the outer thread of the length control bolt (1). The positioning part (31), the sleeve part (32) and the tail part (33) are integrally connected.

6. A pin extractor for quick removal of an extruder pin as defined in claim 5, wherein The outer diameters of the positioning part (31) and the tail part (33) are larger than that of the sleeve part (32). The middle section of the sleeve part (32) is a hexagonal column structure, and the ratchet wrench (4) is provided with a hexagonal inner contour matching the outer contour of the hexagonal column structure.

7. A pin extractor for quick removal of an extruder pin as defined in claim 5, wherein The ratchet wrench (4) comprises a wrench body (41) comprising a handle (411) and a containing space (412) arranged at the head of the handle (411).

8. A pin puller for quick removal of an extruder pin as defined in claim 1, wherein, The containing space (412) of the wrench body (41) is provided with a ratchet wheel (42) matched with the pin positioning sleeve (3) and a fork (43) in contact with the ratchet wheel (42) for adjusting the rotation direction of the ratchet wheel (42). The ratchet wheel (42) comprises a hollow cylindrical spacer sleeve (421) and a ring of ratchet teeth (422) arranged on the outer surface of the hollow cylindrical spacer sleeve (421).

9. A pin extractor for quick removal of an extruder pin according to claim 8, characterized in that The inner surface of the hollow cylindrical spacer sleeve (421) is a hexagonal inner contour matching the pin positioning sleeve (3). The fork (43) is rotatably arranged in the wrench body (41).

10. A pin extractor for quick removal of an extruder pin as defined in claim 9, wherein The front end surface of the fork (43) is symmetrically provided with a clamping protrusion (431) in contact with the ratchet teeth (422) of the ratchet wheel (42) along the axial direction of the wrench body (41). ​

Images