Piston clamping column taking-out tool

Abstract

The utility model provides a piston clamping column taking-out tool, and relates to the technical field of tool clamps. The piston clamping column taking-out tool comprises a multi-petal expansion rod and an insertion rod. The multi-petal expansion rod comprises a hollow rod; the front section of the hollow rod is divided into a plurality of petals by axial notches, hook claws are arranged at the front ends of the petals, bosses extending outwards in the radial direction are arranged on the outer walls of the front sections of the hook claws, and grooves extending inwards in the radial direction are formed in the outer walls of the rear sections of the hook claws; an expansion opening is defined by the inner walls of all the hook claws; the multi-petal expansion rod is inserted into the pump cylinder, the hook claws are folded inwards in the radial direction after making contact with the clamping claws of the piston clamping column, the expansion opening is shrunk, the boss can be inserted into the piston clamping column, and the clamping claws are locked into the grooves. At the moment, the insertion rod is inserted from the rear end of the hollow rod, the front end of the insertion rod is inserted and supports the expansion opening, the hook claws are limited to be folded inwards in the radial direction, locking of the multi-petal expansion rod and the piston clamping column is achieved, and the multi-petal expansion rod can easily and stably pull out the piston clamping column from the straight barrel section.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to a piston pin removal tooling. Background Technology

[0002] The current method of using a medical water jet involves inserting a pump barrel with a piston into the pump barrel interface of the main unit. The pump barrel interface contains a piston rod with a grooved structure on its outer wall. The piston end inside the pump barrel has a piston retainer for connecting to the piston rod, and the retainer has several claws with protruding structures. The pump barrel consists of a straight section and a flared section from head to tail. The inner diameter of the flared section gradually increases from head to tail, while the inner diameter of the straight section is the same as the inner diameter of the flared section's head. A limiting groove is formed at the end of the flared section. After the piston retainer enters the flared section, the claws open under internal stress, and the piston retainer slides towards the end of the flared section until the claws are engaged in the limiting groove, preventing the piston retainer from dislodging from the end of the pump barrel. At this point, the claws are fully open, allowing the piston rod to easily insert into the piston retainer. The piston rod drives the piston retainer into the straight section, where the claws retract under the constraint of the straight section, causing the piston retainer to tightly grip the piston rod. The piston rod then drives the piston to reciprocate within the straight section via the piston retainer, achieving the pumping and pressing of water within the pump barrel.

[0003] However, if the piston pin is not in the flared section but in the straight section when the pump barrel is inserted into the pump barrel interface, the pawl will be pressed and closed by the straight section, preventing the piston rod from entering the piston pin and making it impossible to connect the piston rod and the piston pin. Furthermore, the piston pin located in the straight section is difficult to remove. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a piston pin removal tool, which solves the problem of difficulty in removing the piston pin located in the straight section of the pump cylinder.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A piston stud removal tool, the piston stud removal tool comprising: a multi-lobed expansion rod and an insertion rod;

[0007] The multi-lobed expansion rod includes: a hollow rod;

[0008] The front section of the hollow rod is divided into multiple lobes by an axial cut. Each lobe is provided with a hook at its front end. The outer wall of the front section of the hook is provided with a boss extending radially outward, and the outer wall of the rear section of the hook is provided with a groove extending radially inward. An expansion opening is formed on the inner wall of all the hooks.

[0009] The boss is used to insert the piston pin, and the groove is used to lock the piston pin's claws in place; the insert rod is inserted from the rear end of the hollow rod, and the front end of the insert rod is inserted into and supports the expansion port to limit the claws from retracting radially inward.

[0010] Preferably, the boss is configured as a wedge shape, smaller at the front and larger at the back.

[0011] Preferably, the front end of the insertion rod is tapered, and the inner diameter of the expansion port is smaller than the inner diameter of the hollow rod.

[0012] Preferably, a handle is installed at the rear end of the insertion rod, and a limit block is provided at the front end of the handle.

[0013] Preferably, a base is provided at the end of the hollow rod, and the base has a limiting hole that communicates with the hollow hole of the hollow rod.

[0014] Preferably, a limiting piece is provided at the rear end of the base, and the limiting piece has a limiting notch, the width of which is smaller than the radial width of the limiting block.

[0015] Preferably, when the front end of the insertion rod is inserted into and supports the expansion port, the limiting block just fully enters the limiting hole, the limiting piece is locked at the rear end of the limiting block through the limiting notch, and the limiting piece is fixedly connected to the base.

[0016] Preferably, the base has a plurality of threaded holes, and the limiting piece has mounting holes that correspond one-to-one with the threaded holes. The screws are threadedly connected to the mounting holes and the threaded holes to achieve a fixed connection between the base and the limiting piece.

[0017] This utility model provides a piston pin removal tool. Compared with the prior art, it has the following advantages:

[0018] In this invention, the piston pin removal fixture includes a multi-lobed expansion rod and an insert rod. The multi-lobed expansion rod includes a hollow rod. The front section of the hollow rod is axially cut into multiple lobes, each lob having a hook at its front end. The outer wall of the front section of the hook has a protrusion extending radially outward, and the outer wall of the rear section of the hook has a groove extending radially inward. The inner walls of all the hooks form an expansion opening. The multi-lobed expansion rod is inserted into the pump cylinder. After the hook contacts the piston pin's locking claw, it retracts radially inward, reducing the expansion opening and allowing the protrusion to insert into the piston pin. The locking claw locks into the groove. At this time, the insert rod is inserted from the rear end of the hollow rod, with its front end inserted and supporting the expansion opening, restricting the hook from retracting radially inward. This achieves locking between the multi-lobed expansion rod and the piston pin, allowing the multi-lobed expansion rod to easily and stably pull the piston pin out of the straight cylinder section. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an exploded axial view of the piston pin removal tool in an embodiment of this utility model.

[0021] Figure 2 This is an axial cross-sectional view of the piston pin removal tool and the piston pin in the embodiment of this utility model.

[0022] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0023] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0024] The reference numerals in the figure are set as follows: insert rod 10, handle 11, limit block 12, hollow rod 20, petal 21, hook 22, boss 23, groove 24, expansion port 25, base 30, limit hole 31, threaded hole 32, limit piece 40, limit notch 41, mounting hole 42. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] This application provides a piston pin removal tool, which solves the problem of the piston pin being difficult to remove from the straight section of the pump barrel.

[0027] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0028] Example:

[0029] like Figures 1-4 As shown, this utility model provides a piston pin removal tool, which includes: a multi-lobed expansion rod and an insertion rod 10;

[0030] The multi-lobed expansion rod includes: a hollow rod 20;

[0031] The front section of the hollow rod 20 is divided into multiple segments 21 by an axial cut. Each segment 21 has a hook 22 at its front end. The outer wall of the front segment of the hook 22 has a boss 23 extending radially outward, and the outer wall of the rear segment of the hook 22 has a groove 24 extending radially inward. The inner walls of all the hooks 22 form an expansion opening 25.

[0032] The multi-lobed expansion rod is inserted into the pump cylinder. After the hook 22 contacts the piston pin's claw, it retracts radially inward, and the expansion opening 25 shrinks, allowing the boss 23 to be inserted into the piston pin. The claw locks into the groove 24. At this time, the insert rod 10 is inserted from the rear end of the hollow rod 20, and the front end of the insert rod 10 is inserted and supports the expansion opening 25, restricting the hook 22 from retracting radially inward, thereby locking the multi-lobed expansion rod and the piston pin. This allows the multi-lobed expansion rod to easily and stably pull the piston pin out of the straight cylinder section.

[0033] like Figures 1-4 As shown, the boss 23 is designed as a wedge shape with a smaller front and a larger back, which facilitates the insertion of the boss 23 into the piston pin.

[0034] like Figures 1-4 As shown, the front end of the insertion rod 10 is set in a conical shape, and the inner diameter of the expansion port 25 is smaller than the inner diameter of the hollow rod 20; this facilitates the insertion of the front end of the insertion rod 10 into and supports the expansion port 25, and restricts the claw 22 from retracting.

[0035] like Figure 1 , Figure 2 As shown, a handle 11 is installed at the rear end of the insertion rod 10, and a limit block 12 is provided at the front end of the handle 11;

[0036] The hollow rod 20 is provided with a base 30 at its end, and the base 30 is provided with a limiting hole 31, which is connected to the hollow hole of the hollow rod 20.

[0037] The base 30 has a limiting piece 40 at its rear end. The limiting piece 40 has a limiting notch 41, and the width of the limiting notch 41 is smaller than the radial width of the limiting block 12.

[0038] When the front end of the insertion rod 10 is inserted into and supports the expansion port 25, the limiting block 12 just fully enters the limiting hole 31. After the limiting piece 40 is locked at the rear end of the limiting block 12 through the limiting notch 41, the limiting piece 40 is fixedly connected to the base 30, thereby locking the insertion rod 10 and the expansion port 25 and preventing the front end of the insertion rod 10 from coming out of the expansion port 25.

[0039] The base 30 has a plurality of threaded holes 32, and the limiting piece 40 has mounting holes 42 that correspond one-to-one with the threaded holes 32. The screws are threadedly connected to the threaded holes 32 through the mounting holes 42, thereby achieving a fixed connection between the base 30 and the limiting piece 40.

[0040] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0041] In this embodiment of the present invention, the piston pin removal fixture includes: a multi-lobed expansion rod and an insertion rod 10; the multi-lobed expansion rod includes: a hollow rod 20; the front section of the hollow rod 20 is axially cut into multiple lobes 21, the front end of each lobe 21 is provided with a hook 22, the outer wall of the front section of the hook 22 is provided with a radially outwardly extending boss 23, and the outer wall of the rear section of the hook 22 is provided with a radially inwardly extending groove 24; the inner walls of all the hooks 22 form an expansion opening 25; multiple When the multi-lobed expansion rod is inserted into the pump barrel, the hook 22 contacts the piston pin and retracts radially inward, reducing the expansion opening 25 so that the boss 23 can be inserted into the piston pin and the hook locks into the groove 24. At this time, the insert rod 10 is inserted from the rear end of the hollow rod 20, and the front end of the insert rod 10 is inserted and supports the expansion opening 25, restricting the hook 22 from retracting radially inward, thereby locking the multi-lobed expansion rod with the piston pin and allowing the multi-lobed expansion rod to easily and stably pull the piston pin out of the straight section.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A piston post extraction tool characterized by, The piston post extraction tool comprises a multi-flap expansion rod and a plug rod (10); The multi-flap expansion rod comprises a hollow rod (20); The front section of the hollow rod (20) is divided into multiple flap pieces (21) by axial cuts, the front end of each flap piece (21) is provided with a hook (22), the front section outer wall of the hook (22) is provided with a protrusion (23) extending radially outward, the rear section outer wall of the hook (22) is provided with a groove (24) extending radially inward, and the inner walls of all hooks (22) surround an expansion opening (25); The protrusion (23) is used for inserting the piston post, the groove (24) is used for locking the pawl of the piston post, the plug rod (10) is inserted from the rear end of the hollow rod (20), the front end of the plug rod (10) is inserted and supported in the expansion opening (25) to limit the radial inward folding of the hook (22).

2. The piston gudgeon extraction tool of claim 1 wherein, The protrusion (23) is wedge-shaped with a smaller front end and a larger rear end.

3. The piston gudgeon extraction tool of claim 1 wherein, The front end of the plug rod (10) is conical, and the inner diameter of the expansion opening (25) is smaller than the inner diameter of the hollow rod (20).

4. The piston gudgeon extraction tool of claim 1 wherein, The rear end of the plug rod (10) is provided with a handle (11), and the front end of the handle (11) is provided with a limiting block (12).

5. The piston post extraction tool of claim 4, wherein, The end of the hollow rod (20) is provided with a base (30), the base (30) is provided with a limiting hole (31) in communication with the hollow hole of the hollow rod (20).

6. The piston post extraction tool of claim 5, wherein, The rear end of the base (30) is provided with a limiting piece (40), the limiting piece (40) is provided with a limiting gap (41), and the width of the limiting gap (41) is smaller than the radial width of the limiting block (12).

7. The piston post extraction tool of claim 6, wherein, When the front end of the plug rod (10) is inserted and supported in the expansion opening (25), the limiting block (12) is completely inserted into the limiting hole (31), the limiting piece (40) is clamped at the rear end of the limiting block (12) through the limiting gap (41), and the limiting piece (40) is fixedly connected with the base (30).

8. The piston post extraction tool of claim 7, wherein, The base (30) is provided with a plurality of threaded holes (32), the limiting piece (40) is provided with mounting holes (42) corresponding to the threaded holes (32) in one-to-one correspondence, and a screw is threadedly connected with the threaded holes (32) through the mounting holes (42) to realize the fixed connection between the base (30) and the limiting piece (40).

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