Auxiliary tool for retreating slotted nut cotter pin in special part and narrow space

Abstract

The utility model relates to a retreating assisting tool for a slotted nut cotter pin in a special part and a narrow space. The retreating assisting tool comprises a supporting ring frame (1), a positioning sleeve (2) and a threaded ejector rod (6), the positioning sleeve (2) penetrates through a sleeve threaded through hole (16) in the bottom of the supporting ring frame (1) to be in threaded connection with the supporting ring frame (1), and the advancing and retreating positions of the positioning sleeve (2) are adjusted by rotating a sleeve nut head (7). The threaded ejector rod (6) penetrates through an ejector rod penetrating hole (15) in the sleeve nut head (7) to be in threaded connection with the positioning sleeve (2), and the threaded ejector rod (6) is rotated to advance and retreat along the central axis of the positioning sleeve (2). The supporting ring frame (1) is arranged on a slotted nut or a shaft head for dismounting the cotter pin in a sleeved mode, the positioning sleeve (2) is installed and arranged at the open end of the cotter pin (12) in a sleeved mode, the threaded ejector rod (6) is rotated to eject the cotter pin out of the pin hole (10) through the pin retreating hole (11), and dismounting of the cotter pin is completed.

Description

Technical Field

[0001] The utility model belongs to tools, and particularly relates to an auxiliary tool for withdrawing split pins. Background Art

[0002] In various mechanical equipment, split pins are widely used as mechanical connectors. In mechanical structure design, after a nut and a screw are fastened, a split pin is inserted into a pin hole on the screw to play a role in positioning and preventing the nut from loosening. Especially for slotted nuts, the slotted design enables the split pin to pass through the slot of the nut, thereby fixing the nut and preventing it from rotating or loosening when stressed. This design not only improves the reliability of the connection but also enhances the safety performance of the equipment. This way of using a slotted nut in combination with a split pin is common in equipment that needs to be disassembled frequently and in occasions where the surface space of the connected parts is limited.

[0003] For some special mechanical parts, the space is relatively narrow. For example, for a split pin installed in the slot of a slotted nut, due to inconvenient operation, the operation difficulty of disassembling the split pin is relatively large. Moreover, due to the high-speed rotation and long-term operation of the equipment, the split pin may break, deform or even rust, which further increases the difficulty of disassembly. The traditional methods for disassembling split pins generally use pliers or special pulling hooks to pull them out, or knock them out from the tail end of the split pin. However, for split pins in the narrow space of the above-mentioned special parts, the traditional methods are ineffective. Therefore, a special dedicated tool is needed to effectively solve this problem. At present, no good solution has been seen. Summary of the Invention

[0004] In view of the difficulties faced in disassembling split pins, the utility model provides an auxiliary tool for withdrawing split pins of slotted nuts in special parts and narrow spaces. The tool includes a support ring frame (1), a positioning sleeve (2) and a threaded ejector rod (6). The positioning sleeve (2) passes through a sleeve threaded perforation (16) at the bottom of the support ring frame (1) and is threadedly connected to the support ring frame (1) to fix the positioning sleeve (2) on the support ring frame (1), and the advancing and retreating position of the positioning sleeve (2) is adjusted by rotating a sleeve nut head (7). The threaded ejector rod (6) passes through a ejector rod perforation (15) on the sleeve nut head (7) and is threadedly connected to the positioning sleeve (2), and the threaded ejector rod (6) is rotated to make it advance and retreat along the central axis of the positioning sleeve (2). The support ring frame (1) is sleeved on the head of a slotted nut or the shaft for removing the split pin, the positioning sleeve (2) is installed and sleeved on the open end of the split pin (12), and the split pin is ejected from the pin hole (10) through a pin withdrawal hole (11) by rotating the threaded ejector rod (6) to complete the disassembly of the split pin.

[0005] A special part and narrow space grooved nut cotter pin assisting removal tool of the utility model consists of a support ring frame (1), a positioning sleeve (2) and a threaded ejector rod (6).

[0006] Both sides of the support ring frame (1) are arc-shaped, and the top and bottom are two parallel planes. A cotter pin removal hole (11) is opened at the center position of the top of the support ring frame (1), and a sleeve thread perforation (16) matching the sleeve thread (3) is opened at the center position of its bottom.

[0007] One end of the positioning sleeve (2) is connected with a sleeve nut head (7), the other end is an open pipe orifice, a sleeve thread (3) is machined on the pipe body, a ejector rod perforation (15) is opened at the center position of the sleeve nut head (7), and a sleeve internal thread (14) matching the threaded ejector rod (6) is machined inside it.

[0008] One end of the threaded ejector rod (6) is fixed with an ejector rod seat (5), force applying rods (4) are symmetrically arranged on both sides of it, and an external thread matching the sleeve internal thread (14) is machined on the threaded ejector rod (6).

[0009] The positioning sleeve (2) passes through the sleeve thread perforation (16) at the bottom of the support ring frame (1) and is threadedly connected with the support ring frame (1).

[0010] The threaded ejector rod (6) passes through the ejector rod perforation (15) on the sleeve nut head (7) and is threadedly connected with the positioning sleeve (2), and the threaded ejector rod (6) is rotated to make it advance and retreat along the central axis of the positioning sleeve (2).

[0011] Using this tool to remove the cotter pin has the following beneficial effects compared with the traditional removal method:

[0012] 1. Solve the problem of removing cotter pins in special parts and narrow spaces;

[0013] 2. The structure of the sleeve plus threaded ejector rod is more suitable for removing cotter pins with larger specifications and strengths, and at the same time, the repeated utilization rate of cotter pins can be improved;

[0014] 3. Using this tool to remove cotter pins saves time and effort and improves the operation efficiency. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model, and do not constitute a limitation to the utility model.

[0016] Figure 1 It is a schematic diagram of the external structure of the cotter pin assisting removal tool of the utility model;

[0017] Figure 2It is the sectional view of the support ring frame (1) of the present utility model;

[0018] Figure 3 It is the external structure diagram of the positioning sleeve (2) of the present utility model;

[0019] Figure 4 It is the external structure diagram of the threaded ejector rod (6) of the present utility model.

[0020] Legend: 1. Support ring frame, 2. Positioning sleeve, 3. Sleeve thread, 4. Force - adding rod, 5. Ejector rod seat, 6. Threaded ejector rod, 7. Sleeve nut head, 8. Shaft head, 9. Groove, 10. Pin hole, 11. Pin - withdrawing hole, 12. Split pin, 13. Slotted nut, 14. Internal thread of sleeve, 15. Ejector rod perforation, 16. Sleeve thread perforation. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0022] As Figure 1 shown, a slotted nut split - pin assisting removal auxiliary tool for special parts and narrow spaces is composed of a support ring frame 1, a positioning sleeve 2 and a threaded ejector rod 6. The positioning sleeve 2 passes through the sleeve thread perforation 16 at the bottom of the support ring frame 1 and is threadedly connected to the support ring frame 1. The threaded ejector rod 6 passes through the ejector rod perforation 15 on the sleeve nut head 7 and is threadedly connected to the positioning sleeve 2.

[0023] As Figure 1 , as shown in Figure 2, both sides of the support ring frame 1 are arc - shaped, and the top and bottom are two parallel planes. A pin - withdrawing hole 11 is opened at the center position of the top plane of the support ring frame 1, and a sleeve thread perforation 16 for cooperating with the sleeve thread 3 is opened at the center position of its bottom plane. By rotating the sleeve nut head 7 of the positioning sleeve 2, the positioning sleeve 2 can advance and retreat along the central axis of the support ring frame 1. During operation, rotate the positioning sleeve 2 to place the open end of the split pin 12 inside its tube, and continue to rotate the positioning sleeve 2 until its tube mouth tightly presses against the shaft head 8 of the split pin 12 to be disassembled, indirectly fixing the support ring frame 1 and the slotted nut 13 as a whole.

[0024] As Figure 3As shown in the figure, one end of the positioning sleeve 2 is connected with a sleeve nut head 7, and the other end is an open pipe orifice. A sleeve thread 3 that matches the thread in the sleeve threaded perforation 16 is machined on the pipe body. A push rod perforation 15 is opened at the center position of the sleeve nut head 7, and an internal sleeve thread 14 that mates with the threaded push rod 6 is machined therein. Insert the threaded push rod 6 into the positioning sleeve 2 through the push rod perforation 15, and by rotating the force - applying rod 4 of the threaded push rod 6, the threaded push rod 6 can advance and retreat along its central axis in the positioning sleeve 2.

[0025] As Figure 4 shown, a push rod seat 5 is fixed at one end of the threaded push rod 6, force - applying rods 4 are symmetrically arranged on both sides of it, and an external thread that mates with the internal sleeve thread 14 is machined on the threaded push rod 6.

[0026] The support ring frame 1, the positioning sleeve 2, and the threaded push rod 6 can all be processed and manufactured with high - strength alloy steel, and are not easily deformed and corroded.

[0027] According to different specifications of slotted nuts and the corresponding cotter pins, several specifications and models of cotter - pin assisting - withdrawal auxiliary tools are customized to meet different operation requirements.

[0028] This cotter - pin assisting - withdrawal auxiliary tool can also be used for the removal operation of cotter pins on other ordinary pin shafts.

[0029] As Figure 1 shown, the usage and operation method of a cotter - pin assisting - withdrawal auxiliary tool for slotted nuts in special parts and narrow spaces are as follows:

[0030] Put the support ring frame 1 on the slotted nut 13. The outer plane of the slotted nut 13 at one end of the cotter - pin pull - ring fits with the top plane of the support ring frame 1, so that the pull - ring of the cotter pin 12 is aligned with the cotter - pin withdrawal hole 11, and the open end of the cotter pin 12 is aligned with the sleeve threaded perforation 16.

[0031] Insert the positioning sleeve 2 into the sleeve threaded perforation 16, place the open end of the cotter pin 12 in the positioning sleeve 2, and by screwing the positioning sleeve 2, adjust it until its pipe orifice tightly abuts the shaft head 8 of the cotter pin 12 to be removed.

[0032] Then insert the threaded push rod 6 into the positioning sleeve 2 through the push rod perforation 15. By rotating the force - applying rod 4 of the threaded push rod 6, the threaded push rod 6 tightly abuts the open end of the cotter pin 12 in the positioning sleeve 2. Continue to rotate the force - applying rod 4 to push the cotter pin 12 out of the pin hole 10.

[0033] Remove the support ring frame 1 to complete the removal of the cotter pin.

[0034] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. An auxiliary tool for assisting the withdrawal of slotted nut cotter pins in special parts and narrow spaces, characterized in that: The tool comprises a support ring frame (1), a positioning sleeve (2) and a threaded push rod (6); the two sides of the support ring frame (1) are arc-shaped, the top and the bottom are two parallel planes, a pin withdrawal hole (11) is opened at the center position of the top of the support ring frame (1), and a sleeve thread through hole (16) matching with the sleeve thread (3) is opened at the center position of the bottom; one end of the positioning sleeve (2) is connected to a sleeve nut head (7), and the other end is an open pipe mouth, the pipe body is processed with a sleeve thread (3), a push rod through hole (15) is opened at the center position of the sleeve nut head (7), and the sleeve internal thread (14) matching with the threaded push rod (6) is processed inside the push rod; one end of the threaded push rod (6) is fixed with a push rod seat (5), and force rods (4) are symmetrically arranged on both sides of the push rod, and an external thread matching with the sleeve internal thread (14) is processed on the threaded push rod (6).

2. A slotted nut cotter pin removal auxiliary tool for special parts and narrow spaces as claimed in claim 1, characterized in that: The positioning sleeve (2) passes through the sleeve threaded through hole (16) at the bottom of the support ring frame (1) and is threadedly connected to the support ring frame (1).

3. A slotted nut cotter pin removal auxiliary tool for special parts and narrow spaces as claimed in claim 1, characterized in that: The threaded push rod (6) passes through the push rod through hole (15) on the sleeve nut head (7) and is threadedly connected to the positioning sleeve (2). The threaded push rod (6) is rotated to move forward and backward along the central axis of the positioning sleeve (2).

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