Automatic limiting pin shaft structure

Abstract

The invention relates to the technical field of pin shafts, in particular to an automatic limiting pin shaft structure which comprises a pin shaft body, an extension handle is integrally formed at one end of the pin shaft body, an insertion hole is formed in the surface of the extension handle, a limiting sleeve sleeves one end of the extension handle, insertion handles are inserted into the two sides of the limiting sleeve, and one end of each insertion handle extends into the insertion hole. A positioning block is fixed to one end of the extending handle and inserted into the inner wall of the limiting sleeve, and a screw is fixed to the surface of the positioning block and penetrates through the limiting sleeve; the pin shaft has the beneficial effects that the extension handle is arranged at one end of the pin shaft body, the insertion hole is formed in the extension handle, meanwhile, the limiting sleeve is arranged at one end of the extension handle in a sleeving mode, the insertion handles are inserted into the two sides of the limiting sleeve, and one end of each insertion handle extends into the insertion hole. When the pin shaft body is inserted into a hole of a connecting part, the limiting sleeve firstly enters the hole, the inserting handle is pushed to retract into the first penetrating hole, after the limiting sleeve crosses the hole, the inserting handle pops up to block one side of the connecting part, and therefore the automatic limiting function is achieved.

Description

Technical Field

[0001] The invention relates to the field of pin shafts, and in particular to an automatic limiting pin shaft structure. Background Art

[0002] In the field of mechanical connection, pins are a commonly used connector, widely used in various equipment and structures to achieve fixed or rotating connections between components. Traditional pin structures usually require manual setting of anti-dropping limit structures during installation, such as using pin stop columns, to ensure the stability of the pins on the connecting parts. However, this manual setting method is not only cumbersome to operate, but also prone to loosening or falling off in actual applications, thus affecting the reliability and safety of the connection.

[0003] In order to solve the above problems, an automatic limit pin structure has appeared on the market. This structure can automatically realize the limit function after the pin is installed on the connecting component through a cleverly designed limit mechanism, without manual setting. However, the existing automatic limit pin structure still has some shortcomings in design and use, such as complex limit mechanism, difficult installation and disassembly, and poor limit effect. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic limiting pin structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic limiting pin structure, including a pin body, an extension handle integrally formed at one end of the pin body, a socket is provided on the surface of the extension handle, a limiting sleeve is sleeved on one end of the extension handle, both sides of the limiting sleeve are inserted with insertion handles, one end of the insertion handle extends into the socket, a positioning block is fixed at one end of the extension handle, the positioning block is inserted into the inner wall of the limiting sleeve, a screw is fixed on the surface of the positioning block, the screw passes through the limiting sleeve, and a nut is threadedly connected to one end of the screw.

[0006] Preferably, the rod diameter of the extension handle is smaller than the rod diameter of the pin shaft body, and through holes are provided on both sides of the limiting sleeve. The limiting sleeve is arranged behind the extension handle, and the two through holes correspond to the insertion holes.

[0007] Preferably, the insert handle is inserted into the through hole, and an embedding groove is provided at one end of the insert handle extending into the socket. The embedding groove is an annular groove, and a rubber ring is fixedly sleeved inside the embedding groove. The rubber ring is clamped between the insert handle and the socket to generate elastic deformation.

[0008] Preferably, an end of the inserting handle away from the inserting hole is provided with an inclined surface, and the inclined surface faces away from the pin shaft body.

[0009] Preferably, the surface of the handle is provided with a second through-hole, a baffle is inserted into the inside of the second through-hole, the baffle is fixed to the surface of the first through-hole, rubber support blocks are fixed on both sides of the baffle, and the two rubber support blocks are respectively fixed to the top surface of the second through-hole and the bottom surface of the second through-hole.

[0010] Preferably, a round opening is formed on the surface of the rubber support block, and the width of the rubber support block is smaller than the width of the second perforation.

[0011] Preferably, a slot is provided at one end of the pin shaft body, and the slot is an annular groove with a circular cross-section. An insert ring is inserted into the interior of the slot, one end of the insert ring is fixed to the surface of the limit sleeve, and a rubber sleeve is fixed on the other end of the insert ring. The rubber sleeve is a circular ring plate with a circular cross-section, and the rubber sleeve is inserted into the slot, and the diameter of the circular surface of the rubber sleeve is larger than the slot width of the slot.

[0012] Preferably, a buckle groove is provided on the surface of the limit sleeve, the limit sleeve is arranged behind the extension handle, the buckle groove is arranged on the positioning block, and a through hole three is provided at one end of the limit sleeve, the through hole three is a "convex" shaped circular hole, the screw passes through the through hole three, and after the screw and the nut are locked, the nut is in the through hole three.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The pin shaft structure with automatic position limiting proposed by the present invention is provided with an extension handle at one end of the pin shaft body, and a plug hole is provided on the extension handle, and a position limiting sleeve is sleeved on one end of the extension handle, and plug handles are inserted on both sides of the position limiting sleeve, and one end of the plug handle extends into the plug hole. When the pin shaft body is inserted into the hole of the connecting component, the position limiting sleeve first enters the hole, and the plug handle is pushed and retracted into the through hole. When the position limiting sleeve passes over the hole, the plug handle pops out and blocks one side of the connecting component, thereby realizing the automatic position limiting function. This design not only simplifies the installation steps, but also improves the reliability and safety of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a side view of the structure of the present invention;

[0017] Figure 3 for Figure 2 Structural cross-section view at AA in the middle;

[0018] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0019] Figure 5 It is a schematic diagram of the connection structure between the pin body and the extension handle of the present invention;

[0020] Figure 6It is a schematic diagram of the structure of the limit sleeve of the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of the plug handle of the present invention;

[0022] Figure 8 It is a schematic diagram of the connection structure of the baffle bar and the rubber support block of the present invention.

[0023] In the figure: pin body 1, extension handle 2, plug hole 3, limit sleeve 4, through hole 1 5, plug handle 6, embedding groove 7, rubber ring 8, through hole 2 9, baffle 10, rubber support block 11, inclined surface 12, buckle groove 13, positioning block 14, through hole 3 15, screw 16, nut 17, slot 18, plug ring 19, rubber sleeve 20. DETAILED DESCRIPTION

[0024] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 8 The present invention provides a technical solution: an automatic limit pin structure, comprising a pin body 1, one end of the pin body 1 is integrally formed with an extension handle 2, the surface of the extension handle 2 is provided with a plug hole 3, one end of the extension handle 2 is sleeved with a limiting sleeve 4, both sides of the limiting sleeve 4 are plugged with plug handles 6, one end of the plug handle 6 extends into the plug hole 3, the rod diameter of the extension handle 2 is smaller than the rod diameter of the pin body 1, both sides of the limiting sleeve 4 are provided with a through hole 1 5, after the limiting sleeve 4 is sleeved on the extension handle 2, the two through holes 1 5 correspond to the plug hole 3; the plug handle 6 is inserted into the through hole 1 5, and the end of the plug handle 6 extending into the plug hole 3 is provided with an embedding groove 7, the embedding groove 7 is an annular groove, and a rubber ring 8 is sleeved and fixed inside the embedding groove 7, the rubber ring 8 is clamped between the plug handle 6 and the plug hole 3 to produce elastic deformation, and the end of the plug handle 6 away from the plug hole 3 is provided with an inclined surface 12, and the inclined surface 12 faces away from the pin body 1.

[0026] During use, when the limiting sleeve 4 is not set on the extension handle 2, the traditional pin stop column is inserted into the insertion hole 3 to realize the anti-slip limit of the pin body 1 installed on the connecting component, that is, the above operation is to manually set the anti-slip limit structure of the pin body 1; when the limiting sleeve 4 is installed on the extension handle 2 and the pin body 1 is inserted into the hole of the connecting component, the limiting sleeve 4 first enters the hole, and the two insertion handles 6 are squeezed and retracted into the through hole 5. When the limiting sleeve 4 passes over the hole, the insertion handle 6 pops out and blocks one side of the connecting component, thereby realizing automatic limiting of the pin body 1 after being installed on the connecting component.

[0027] A slot 18 is provided at one end of the pin shaft body 1. The slot 18 is an annular groove with a circular cross section. An insert ring 19 is inserted into the interior of the slot 18. One end of the insert ring 19 is fixed to the surface of the limit sleeve 4. A rubber sleeve 20 is fixed to the other end of the insert ring 19. The rubber sleeve 20 is a circular ring plate with a circular cross section. The rubber sleeve 20 is inserted into the slot 18. The diameter of the circular surface of the rubber sleeve 20 is greater than the width of the slot 18.

[0028] The reason for adding the insert ring 19 and the rubber sleeve 20 is that after the limit sleeve 4 is sleeved on the extension handle 2, the insert ring 19 and the rubber sleeve 20 are inserted into the card slot 18 to be limited, thereby realizing the traction limitation of the limit sleeve 4, that is, completing the anti-slip limitation of the limit sleeve 4 after the limit sleeve 4 is sleeved on the extension handle 2.

[0029] A through hole 29 is provided on the surface of the plug handle 6, and a baffle 10 is inserted into the inside of the through hole 29. The baffle 10 is fixed to the surface of the through hole 1 5, and rubber support blocks 11 are fixed on both sides of the baffle 10. The two rubber support blocks 11 are respectively fixed to the top surface of the through hole 29 and the bottom surface of the through hole 29; a round opening is provided on the surface of the rubber support block 11, and the width of the rubber support block 11 is smaller than the width of the through hole 29. The reason why a baffle 10 is provided on the inner side of the plug handle 6, and rubber support blocks 11 are installed on both sides of the baffle 10 to connect the plug handle 6, is to realize the limiting of the plug handle 6 after it is inserted into the through hole 5, that is, when the two rubber support blocks 11 are in the initial state, one end of the plug handle 6 is inserted into the insertion hole 3, and the other end of the plug handle 6 extends out of the through hole 5, and it is necessary to remove the limiting sleeve 4 from the extension handle 2, and then pinch the plug handle 6 to stretch the plug handle 6 toward the outside of the through hole 5, and one rubber support block 11 is squeezed and deformed by the baffle 10, and the other rubber support block 11 is stretched and deformed by the baffle 10, until one end of the plug handle 6 is pulled out of the insertion hole 3, at this time there is no limit between the limiting sleeve 4 and the extension handle 2, and the limiting sleeve 4 can be pulled out of the extension handle 2.

[0030] A positioning block 14 is fixed at one end of the extension handle 2, and the positioning block 14 is inserted into the inner wall of the limiting sleeve 4. A screw 16 is fixed on the surface of the positioning block 14, and the screw 16 passes through the limiting sleeve 4, and a nut 17 is threaded on one end of the screw 16; a buckle groove 13 is provided on the surface of the limiting sleeve 4, and after the limiting sleeve 4 is sleeved on the extension handle 2, the buckle groove 13 is sleeved on the positioning block 14, and a through hole three 15 is provided at one end of the limiting sleeve 4, and the through hole three 15 is a "convex" shaped circular hole, and the screw 16 passes through the through hole three 15. After the screw 16 and the nut 17 are locked, the nut 17 is in the through hole three 15.

[0031] The reason for adding the positioning block 14 and the screw 16 is to strengthen the connection between the extension handle 2 and the limiting sleeve 4. When the limiting sleeve 4 is sleeved on the extension handle 2, the positioning block 14 is inserted into the buckle groove 13, and the screw 16 passes through the through hole 15, and the nut 17 is sleeved on the screw 16 and locked. The use process is as follows:

[0032] Manually set the anti-drop limit (without the limit sleeve 4). When the limit sleeve 4 is not set on the extension handle 2, select the traditional pin stop column. Insert the pin stop column into the socket 3 to ensure that the pin body 1 is firmly on the connecting component to prevent it from falling off.

[0033] Automatic limit setting (using limit sleeve 4), put the limit sleeve 4 on the extension handle 2, and ensure that the perforation 15 corresponds to the insertion hole 3. Insert the plug ring 19 and the rubber sleeve 20 into the slot 18 to achieve preliminary traction limit of the limit sleeve 4. Check whether the positioning block 14 is correctly inserted into the buckle slot 13. Pass the screw 16 through the perforation 3 15, and prepare the nut 17. Insert the pin body 1 into the hole of the connecting part. The limit sleeve 4 first enters the hole, and the insertion handle 6 is squeezed and compressed into the perforation 1 5. When the limit sleeve 4 completely passes over the hole, the insertion handle 6 pops out and blocks one side of the connecting part to achieve automatic limit. Put the nut 17 on the screw 16 and tighten it to ensure that the nut 17 is in the perforation 3 15 to strengthen the connection between the extension handle 2 and the limit sleeve 4.

[0034] When releasing the limit and disassembling, pinch the insert handle 6 and pull it toward the outside of the through hole 1 5, so that one rubber support block 11 is squeezed and deformed by the stop bar 10, and the other rubber support block 11 is pulled and deformed by the stop bar 10. Continue until one end of the insert handle 6 is pulled out of the insertion hole 3, at which time there is no limit between the limit sleeve 4 and the extension handle 2. Loosen the nut 17 and remove the nut 17 from the screw rod 16. Pull the limit sleeve 4 away from the extension handle 2, and ensure that the insert ring 19 and the rubber sleeve 20 are out of the slot 18.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic limit pin structure, comprising a pin body (1), characterized in that: An extension handle (2) is integrally formed at one end of the pin shaft body (1), a plug hole (3) is provided on the surface of the extension handle (2), a limit sleeve (4) is sleeved on one end of the extension handle (2), both sides of the limit sleeve (4) are plugged with plug handles (6), one end of the plug handle (6) extends into the plug hole (3), a positioning block (14) is fixed at one end of the extension handle (2), the positioning block (14) is plugged into the inner wall of the limit sleeve (4), a screw rod (16) is fixed on the surface of the positioning block (14), the screw rod (16) passes through the limit sleeve (4), and a nut (17) is sleeved on one end of the screw rod (16) and is threaded.

2. The automatic limit pin structure according to claim 1, characterized in that: The rod diameter of the extension handle (2) is smaller than the rod diameter of the pin shaft body (1), and a through hole (5) is provided on both sides of the limiting sleeve (4). After the limiting sleeve (4) is sleeved on the extension handle (2), the two through holes (5) correspond to the insertion hole (3).

3. The automatic limit pin structure according to claim 2, characterized in that: The inserting handle (6) is inserted into the through hole (5), and an inserting groove (7) is provided at one end of the inserting handle (6) extending into the insertion hole (3). The inserting groove (7) is an annular groove, and a rubber ring (8) is fixedly sleeved inside the inserting groove (7). The rubber ring (8) is clamped between the inserting handle (6) and the insertion hole (3) to generate elastic deformation.

4. The automatic limit pin structure according to claim 1, characterized in that: An inclined surface (12) is provided at one end of the inserting handle (6) away from the inserting hole (3), and the inclined surface (12) faces away from the pin shaft body (1).

5. The automatic limit pin structure according to claim 2, characterized in that: The surface of the inserting handle (6) is provided with a second through hole (9), a blocking bar (10) is inserted into the interior of the second through hole (9), the blocking bar (10) is fixed on the surface of the first through hole (5), and rubber support blocks (11) are fixed on both sides of the blocking bar (10), and the two rubber support blocks (11) are respectively fixed on the top surface of the second through hole (9) and the bottom surface of the second through hole (9).

6. The automatic limit pin structure according to claim 5, characterized in that: A circular opening is formed on the surface of the rubber support block (11), and the width of the rubber support block (11) is smaller than the width of the second perforation (9).

7. The automatic limit pin structure according to claim 1, characterized in that: A clamping groove (18) is provided at one end of the pin shaft body (1), the clamping groove (18) is an annular groove with a circular cross section, an insert ring (19) is inserted into the interior of the clamping groove (18), one end of the insert ring (19) is fixed to the surface of the limiting sleeve (4), and a rubber sleeve (20) is sleeved and fixed to the other end of the insert ring (19), the rubber sleeve (20) is an annular plate with a circular cross section, the rubber sleeve (20) is inserted into the clamping groove (18), and the diameter of the circular surface of the rubber sleeve (20) is greater than the slot width of the clamping groove (18).

8. The automatic limit pin structure according to claim 1, characterized in that: The surface of the limiting sleeve (4) is provided with a buckle groove (13). After the limiting sleeve (4) is sleeved on the extension handle (2), the buckle groove (13) is sleeved on the positioning block (14). One end of the limiting sleeve (4) is provided with a third through hole (15). The third through hole (15) is a "convex" shaped circular hole. The screw rod (16) passes through the third through hole (15). After the screw rod (16) and the nut (17) are locked, the nut (17) is located in the third through hole (15).

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