Pin pulling device for self-locking pin

Abstract

The utility model provides a pin pulling device for a self-locking pin, the pin pulling device is used for pulling out a pin of the self-locking pin, the self-locking pin further comprises a pin nut and a lock ring which are sleeved inside and outside and can slide relatively, the locking state of the pin can be relieved by changing the relative position of the pin nut and the lock ring so as to pull out the pin, and the pin pulling device comprises a support and a pin pulling rod, the limiting end is used for determining the relative position of the self-locking pin pulling device and the self-locking pin, the support is further provided with a sliding guide structure, and a pin pulling opening is formed in the side, close to the limiting end, of the sliding guide structure and used for allowing the pin to penetrate through. The pin pulling assembly is in sliding connection with the sliding guide structure in the axial direction, a pin clamping part used for containing a pin and limiting the pin in the axial direction is arranged on the side, close to the limiting end, of the pin pulling assembly, a first opening is formed in the pin clamping part, and the first opening is located at the end close to the pin pulling opening so that the pin can penetrate through the first opening, and the head of the pin can be limited in the axial direction. According to the self-locking pin pulling device provided by the invention, the self-locking pin can be conveniently and quickly disassembled.

Description

Technical Field

[0001] The present application belongs to the technical field of pin pulling tools, and in particular, relates to a self-locking pin pulling device. Background Art

[0002] A self-locking pin is a pin that can be locked automatically, mainly used to prevent loosening or movement in the event of a lock failure. It achieves the locking effect by increasing the friction between the nut and the pin, so it is particularly suitable for situations that require high stability, harsh environments, and frequent vibrations and impacts.

[0003] When installing a self-locking pin, you usually need to insert the self-locking pin into the connection hole and gently press it to fully insert it. At the same time, the locking ring will automatically lock in the connection hole. When removing, you need to first press the locking ring to put it in an unlocked state, and then gently pull out the self-locking pin. However, in order to prevent accidental touch, the locking ring of the self-locking pin is usually set smaller. However, since the contact surface of the locking ring is set smaller, it is not convenient to press the locking ring during removal, resulting in reduced production efficiency. Summary of the invention

[0004] In view of this, the present application provides a self-locking pin pulling device to solve the current technical problem that the self-locking pin is not convenient to remove.

[0005] The present application provides a self-locking pin pulling device, which is used to pull out the pin of the self-locking pin. The self-locking pin also includes a pin nut and a lock ring which are relatively slidably arranged inside and outside. By changing the relative positions of the pin nut and the lock ring, the locking state of the pin can be released to pull it out. The self-locking pin pulling device includes:

[0006] The bracket has a fixed end and a limiting end, the limiting end is used to determine the relative position of the self-locking pin pulling device and the self-locking pin, and the bracket is also provided with a sliding guide structure, and a pin pulling opening is provided on a side of the sliding guide structure close to the limiting end for the pin to pass through;

[0007] A pin pulling assembly is slidably connected to the sliding guide structure along the axial direction. A latching portion for accommodating a pin and limiting the pin in the axial direction is provided on one side of the pin pulling assembly close to the limiting end. The latching portion is provided with a first opening, which is located at an end close to the pin pulling opening so that the pin can pass through and the head of the pin can be axially limited.

[0008] In some embodiments, the sliding guide structure includes an installation groove, the pin portion is slidably arranged in the installation groove, the pin pulling assembly also includes a pull rod passing through the bracket, the pin portion is also provided with a limiting groove, the limiting groove is located at the end of the pin portion close to the limiting end, the pull rod is connected to the pin portion, and at least one side of the bracket is provided with a sliding hole, and the pull rod is slidably connected to the bracket through the sliding hole.

[0009] In some embodiments, the width of the limit groove is W1, the maximum dimension of the pin head is W2, the minimum distance at the first opening is W3, W1≥W2>W3, and a limit protrusion is circumferentially provided at one end of the limit groove close to the limit end, and the limit protrusion extends toward the axis close to the limit groove so that the minimum distance of the first opening is smaller than the maximum dimension of the pin head.

[0010] In some embodiments, the limiting protrusion has an inclined surface on one side close to the limiting groove, and the inclined surface is inclined from close to the limiting groove to the first opening, and is inclined toward the axis close to the limiting groove to adapt to the head of the pin and avoid wear thereon.

[0011] In some embodiments, a second opening is further provided on the side of the bayonet portion to facilitate the sideways entry of the pin and observation, and the first opening and the second opening are arranged adjacent to each other;

[0012] Alternatively, the bayonet portion includes an axially arranged one-way retaining spring, and the other end of the bayonet portion is provided with an outlet so that the pin can be withdrawn.

[0013] In some embodiments, the width of the mounting slot is greater than or equal to the width of the bayonet portion;

[0014] And / or, the latch portion is further provided with a clearance groove, which is communicated with the mounting groove and the limiting groove so that the pulled-out pin can be taken out through the clearance groove.

[0015] In some embodiments, the sliding holes are provided on opposite sides of the bracket, and the pull rod is passed through the sliding hole and an end of the bayonet portion away from the limiting end.

[0016] In some embodiments, the fixed end has a pressing surface facing outward vertically and axially, and the pull rod is located on both sides of the bracket and has a pulling surface in the opposite direction of the pressing surface. The pulling surface has a concave shape, which is ergonomically designed to facilitate finger exertion to prevent slipping.

[0017] In some embodiments, the pin pulling device also includes a reset member disposed in the mounting groove, one end of the reset member is connected to the fixed end, and the other end of the reset member is connected to the pin pulling assembly, and the reset member is used to restore the pin pulling assembly to its original position after the pin pulling assembly completes a pin pulling action, so as to facilitate the next pin pulling.

[0018] In some embodiments, the pin pulling device also includes a reset member arranged in the mounting groove, the reset member includes a spring, a first connecting column is provided at the end of the pin portion away from the limiting end, a second connecting column is provided on the inner side of the bracket close to the fixed end, the two ends of the spring are respectively sleeved on the first connecting column and the second connecting column, and the distance between the first connecting column and the second connecting column is greater than or equal to the maximum sliding distance of the pin pulling assembly.

[0019] In some embodiments, the limiting end is further provided with a positioning portion, and the positioning portion is provided with a positioning groove to position and fix the locking ring of the self-locking pin;

[0020] And / or, a protrusion is provided along the circumference of the fixed end to increase the contact surface of the fixed end and reduce the pressure of the fixed end on the supporting surface;

[0021] And / or, the fixed end is also provided with a buffer pad.

[0022] The self-locking pin pulling device provided by the present application has a pin portion of the self-locking pin entering the sliding guide structure on the bracket through the pin pulling opening, and then the relative position of the self-locking pin is determined by the limiting end, and the pin portion of the pin pulling assembly is used to axially limit the pin, and then the pin is pulled axially by the pin pulling assembly. At this time, the locking ring on the self-locking pin is blocked by the limiting end and retracts, thereby unlocking the locking cooperation between the pin and the locking ring, and the pin is pulled out, and then taken out through the pin pulling opening, so that the self-locking pin can be disassembled quickly and conveniently, effectively improving the production operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a structural schematic diagram of a self-locking pin in the related art;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the self-locking pin pulling device provided in an embodiment of the present application;

[0026] Figure 3 yes Figure 2 A front view of

[0027] Figure 4 It is a schematic diagram of the working process of the self-locking pin pulling device provided in an embodiment of the present application.

[0028] Among them, the figure numbers are:

[0029] 10. Self-locking pin; 11. Pin; 12. Pin nut; 13. Locking ring;

[0030] 20, bracket; 200, limiting end; 201, fixing end; 2010, pressing surface; 2011, protrusion; 202, sliding hole; 203, positioning part; 2030, positioning groove; 21, sliding guide structure; 210, pin removal opening;

[0031] 30. Pin pulling assembly; 31. Pin portion; 310. First opening; 311. Limiting groove; 312. Limiting protrusion; 3120. Inclined surface; 313. Second opening; 314. Displacement groove; 32. Pull rod; 320. Pulling surface; 33. Resetting member; 34. First connecting column; 35. Second connecting column. DETAILED DESCRIPTION

[0032] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0033] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0037] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "Multiple" means two or more.

[0038] In related technologies, such as Figure 1 As shown, the self-locking pin 10 includes a nut 12 and a lock ring 13 which are arranged inside and outside the nut 12 and can slide relatively, and a pin 11 inserted into the nut 12 .

[0039] like Figures 1 to 4 As shown, the embodiment of the present application provides a self-locking pin pulling device, which is used to pull out the pin 11 of the self-locking pin 10. The self-locking pin 10 also includes a pin nut 12 and a lock ring 13 that are relatively slidable inside and outside. By changing the relative positions of the pin nut 12 and the lock ring 13, the locking state of the pin 11 can be released to pull it out. The self-locking pin pulling device includes:

[0040] The bracket 20 has a fixed end 201 and a limiting end 200. The limiting end 200 is used to determine the relative position of the self-locking pin pulling device and the self-locking pin 10. The bracket 20 is also provided with a sliding guide structure 21. A side of the sliding guide structure 21 close to the limiting end 200 is provided with a pin pulling opening 210 for the pin 11 to pass through.

[0041] The pin pulling assembly 30 is slidably connected to the sliding guide structure 21 along the axial direction. A pin portion 31 for accommodating the pin 11 and axially limiting the pin 11 is provided on one side of the pin pulling assembly 30 close to the limiting end 200. The pin portion 31 is provided with a first opening 310. The first opening 310 is located at one end close to the pin pulling opening 210 to allow the pin 11 to pass through and axially limit the head of the pin 11.

[0042] The self-locking pin pulling device provided in the embodiment of the present application, the pin 11 of the self-locking pin partially enters the sliding guide structure 21 on the bracket 20 through the pin pulling opening 210, and then the relative position of the self-locking pin 10 is determined by the limiting end 200, and the pin 11 is axially limited by the locking pin portion 31 of the pin pulling assembly 30, and then the pin 11 is pulled axially by the pin pulling assembly 30. At this time, the locking ring 13 on the self-locking pin is blocked by the limiting end 200 and retracts, thereby unlocking the locking cooperation between the pin 11 and the locking ring 13, and the pin 11 is pulled out, and then the pin 11 is taken out through the pin pulling opening 210, so that the self-locking pin 10 can be disassembled quickly and conveniently, effectively improving the production operation efficiency.

[0043] It should be noted that the axial direction is the length direction of the pin 11 and the bracket 20. The above is only for the convenience of explanation and should not be understood as limiting the scope of the present application. The limit end 200 is used to determine the relative position of the self-locking pin pulling device and the self-locking pin 10. Specifically, the limit end 200 is used to fix the pin nut 12 or the surrounding structure fixedly connected to the pin nut 12, so as to limit and fix the part of the self-locking pin 10 except the pin 11, so as to facilitate the pin pulling assembly 30 to pull out the pin 11.

[0044] In some embodiments, Figures 2 to 4 As shown, the sliding guide structure 21 includes an installation groove, and the bayonet portion 31 is slidably arranged in the installation groove. The pin extraction assembly 30 also includes a pull rod 32 that penetrates the bracket 20. The bayonet portion 31 also has a limiting groove 311, and the limiting groove 311 is located at the end of the bayonet portion 31 close to the limiting end 200. The pull rod 32 is connected to the bayonet portion 31. At least one side of the bracket 20 has a sliding hole 202, and the pull rod 32 is slidably connected to the bracket 20 through the sliding hole 202. The bayonet portion 31 is pulled by the pull rod 32, thereby driving the pin 11 to move in the axial direction, and the pin nut 12 is located outside the limiting end 200. During the pulling process, the lock ring 13 abuts against the limiting end 200, and the lock ring 13 is subjected to pressure and retracts inward, thereby unlocking the locking connection between the pin 11 and the pin nut 12, and the pin 11 is taken out.

[0045] In application, the sliding guide structure 21 may also be a guide rod, a guide rail, etc. The latch portion 31 may be axially slidable to remove the pin 11 from the nut 12 .

[0046] In some embodiments, Figures 2 to 4 As shown, the width of the limiting groove 311 is W1, the maximum size of the head of the pin 11 is W2, and the minimum distance at the first opening 310 is W3, wherein W1≥W2>W3;

[0047] A limiting protrusion 312 is circumferentially provided at one end of the limiting groove 311 close to the limiting end 200 , and the limiting protrusion 312 extends toward the axis close to the limiting groove 311 , so that the minimum distance of the first opening 310 is smaller than the maximum size of the head of the pin 11 .

[0048] In application, the limiting groove 311 can be a regular rectangular groove, or an arc groove of different sizes, etc., and the head of the pin 11 as a whole is usually larger, and it is not a regular column, so it is necessary to limit the width W1 of the limiting groove 311 ≥ the maximum size W2 of the head of the pin 11, so that it can be ensured that the pin 11 can enter the limiting groove 311 of the latching portion 31 and can be axially limited; and the first opening 310 is used to accommodate the bottom of the pin 11 (the part connected to the pin nut 12) to pass through, so that when the pin 11 is pulled out, the bottom of the pin 11 can pass through the first opening 310 smoothly, so that the pin 11 can be taken out as a whole from the pin pulling port 210. It should be noted that, generally speaking, the size of the pin nut 12 is larger than the pin 11, and the width of the first opening 310 here is smaller than the size of the pin nut 12, so that the pin nut 12 can be prevented from passing through the first opening 310, so as to ensure that the limiting end 200 can limit and fix the pin nut 12.

[0049] In some embodiments, Figures 2 to 4 As shown, the limiting protrusion 312 has an inclined surface 3120 on one side close to the limiting groove 311. The inclined surface 3120 is inclined from close to the limiting groove 311 to the first opening 310, and is inclined toward the axis close to the limiting groove 311 to adapt to the head of the pin 11 and avoid wear thereon.

[0050] In some embodiments, Figures 2 to 4 As shown, a second opening 313 is further provided on the side of the latch portion 31 to facilitate the side entry of the pin 11 and facilitate observation, and the first opening 310 and the second opening 313 are disposed adjacent to each other.

[0051] In other embodiments, the bayonet portion 31 includes an axially arranged one-way retaining spring, and the other end of the bayonet portion 31 is provided with an outlet so that the pin 11 can be withdrawn.

[0052] In some embodiments, Figures 2 to 4 As shown, the width of the installation slot is greater than or equal to the width of the bayonet portion 31. In this way, it can be ensured that the bayonet portion 31 can be slidably arranged in the installation slot, so that the axial pulling of the pin 11 is achieved.

[0053] In some embodiments, the latch portion 31 is further provided with a clearance groove 314 , which is connected to the installation groove and the limiting groove 311 , so that the pulled-out pin 11 can be taken out through the clearance groove 314 .

[0054] In some embodiments, Figures 2 to 4 As shown, the bracket 20 has sliding holes 202 on both sides, and the pull rod 32 is inserted through the sliding hole 202 and the end of the bayonet portion 31 away from the limit end 200. In this way, the pull rods 32 on both sides pull the bayonet portion 31, so that the pin 11 can be taken out more quickly.

[0055] In some embodiments, Figures 2 to 4 As shown, the fixed end 201 has a pressing surface 2010 facing outward in a vertical axial direction, and the pull rod 32 is located on both sides of the bracket 20 and is provided with a pulling surface 320 in the opposite direction of the pressing surface 2010. The pulling surface 320 has a concave shape, which is ergonomically designed to facilitate finger exertion to prevent slipping.

[0056] In some embodiments, Figures 2 to 4 As shown, the self-locking pin pulling device also includes a reset member 33 arranged in the installation groove, one end of the reset member 33 is connected to the fixed end 201, and the other end of the reset member 33 is connected to the pin pulling assembly 30. The reset member 33 is used to restore the pin pulling assembly 30 to its original position after the pin pulling assembly 30 completes a pin pulling action, so as to facilitate the next pin pulling.

[0057] In application, the reset member 33 is a spring, one end of which is connected to the fixed end 201, and the other end of the spring is connected to an end of the bayonet portion 31 close to the fixed end 201. When the bayonet portion 31 is pulled by the pull rod 32, the spring will be deformed, so that the spring has elastic potential energy to restore the bayonet portion 31 to its original position. After the pin 11 is taken out, the pull rod 32 is released and the spring will bounce the bayonet portion 31 back to its original position for the next pin removal operation.

[0058] In some embodiments, Figures 2 to 4 As shown, the reset member 33 includes a spring, a first connecting column 34 is provided at one end of the bayonet portion 31 away from the limiting end 200, a second connecting column 35 is provided on the inner side of the bracket 20 close to the fixed end 201, and both ends of the spring are respectively sleeved on the first connecting column 34 and the second connecting column 35, and the spacing between the first connecting column 34 and the second connecting column 35 is greater than or equal to the maximum sliding distance of the bayonet portion 31. In application, the spacing between the first connecting column 34 and the second connecting column 35 is greater than or equal to the length of the pin 11 in the pin nut 12, thereby ensuring that the pin 11 can be taken out of the pin nut 12.

[0059] In some embodiments, Figures 2 to 4As shown, the limiting end 200 is further provided with a positioning portion 203 , and the positioning portion 203 is provided with a positioning groove 2030 to position and fix the locking ring 13 of the self-locking pin.

[0060] In some embodiments, Figures 2 to 4 As shown, a protrusion 2011 is provided along the circumference of the fixed end 201 to increase the contact surface of the fixed end 201 and reduce the pressure of the fixed end 201 on the supporting surface.

[0061] In some embodiments, the fixed end 201 is further provided with a buffer pad, so as to alleviate the hard contact between the operator and the fixed end 201 and protect the operator's palm.

[0062] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A self-locking pin pulling device, used for pulling out the pin of the self-locking pin, wherein the self-locking pin further comprises a pin nut and a lock ring which are relatively slidably arranged inside and outside the pin nut, and the locking state of the pin can be released to be pulled out by changing the relative position of the pin nut and the lock ring, characterized in that: The self-locking pin pulling device comprises: The bracket has a fixed end and a limiting end, the limiting end is used to determine the relative position of the self-locking pin pulling device and the self-locking pin, and the bracket is also provided with a sliding guide structure, and a pin pulling opening is provided on a side of the sliding guide structure close to the limiting end for the pin to pass through; A pin pulling assembly is slidably connected to the sliding guide structure along the axial direction. A latching portion for accommodating a pin and limiting the pin in the axial direction is provided on one side of the pin pulling assembly close to the limiting end. The latching portion is provided with a first opening, which is located at an end close to the pin pulling opening so that the pin can pass through and the head of the pin can be axially limited.

2. The self-locking pin pulling device according to claim 1, characterized in that: The sliding guide structure includes an installation groove, the pin part is slidably arranged in the installation groove, the pin pulling assembly also includes a pull rod passing through the bracket, the pin part is also provided with a limiting groove, the limiting groove is located at the end of the pin part close to the limiting end, the pull rod is connected to the pin part, at least one side of the bracket is provided with a sliding hole, and the pull rod is slidably connected to the bracket through the sliding hole.

3. The self-locking pin pulling device according to claim 2, characterized in that: The width of the limiting groove is W1, the maximum size of the pin head is W2, the minimum distance at the first opening is W3, W1≥W2>W3, a limiting protrusion is circumferentially provided at one end of the limiting groove close to the limiting end, and the limiting protrusion extends toward the axis close to the limiting groove, so that the minimum distance of the first opening is smaller than the maximum size of the pin head; The limiting protrusion has an inclined surface on one side close to the limiting groove, and the inclined surface is inclined from close to the limiting groove to the first opening and is arranged toward the axis close to the limiting groove to adapt to the head of the pin and avoid wear on it.

4. The self-locking pin pulling device according to claim 1, characterized in that: A second opening is also provided on the side of the bayonet portion to facilitate the side entry of the pin and observation, and the first opening and the second opening are arranged adjacent to each other; Alternatively, the bayonet portion includes an axially arranged one-way retaining spring, and the other end of the bayonet portion is provided with an outlet so that the pin can be withdrawn.

5. The self-locking pin pulling device according to claim 2, characterized in that: The width of the mounting groove is greater than or equal to the width of the bayonet portion; And / or, the latch portion is further provided with a clearance groove, which is communicated with the mounting groove and the limiting groove so that the pulled-out pin can be taken out through the clearance groove.

6. The self-locking pin pulling device according to claim 2, characterized in that: The sliding holes are provided on opposite sides of the bracket, and the pull rod is passed through the sliding hole and an end of the bayonet portion away from the limiting end.

7. The self-locking pin pulling device according to claim 6, characterized in that: The fixed end has a pressing surface perpendicular to the axis and facing outward, and the pull rod is located on both sides of the bracket and has a pulling surface in the opposite direction of the pressing surface. The pulling surface has a concave shape, which is ergonomically designed to facilitate finger exertion to prevent slipping.

8. The self-locking pin pulling device according to claim 2, characterized in that: The self-locking pin pulling device also includes a reset member arranged in the installation groove, one end of the reset member is connected to the fixed end, and the other end of the reset member is connected to the pin pulling assembly. The reset member is used to restore the pin pulling assembly to its original position after the pin pulling assembly completes a pin pulling action, so as to facilitate the next pin pulling.

9. The self-locking pin pulling device according to claim 8, characterized in that: The reset member includes a spring, a first connecting column is provided at one end of the bayonet portion away from the limiting end, a second connecting column is provided on the inner side of the bracket close to the fixed end, the two ends of the spring are respectively sleeved on the first connecting column and the second connecting column, and the distance between the first connecting column and the second connecting column is greater than or equal to the maximum sliding distance of the bayonet portion.

10. The self-locking pin pulling device according to any one of claims 1 to 9, characterized in that: The limiting end is also provided with a positioning portion, and the positioning portion is provided with a positioning groove to position and fix the locking ring of the self-locking pin; And / or, a protrusion is provided along the circumference of the fixed end to increase the contact surface of the fixed end and reduce the pressure of the fixed end on the supporting surface; And / or, the fixed end is also provided with a buffer pad.

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