Pin shaft connecting structure and mechanical tool

Abstract

This application relates to the field of mechanical connection structure technology, and discloses a pin connection structure and mechanical tool. The pin connection structure includes a main body having a mounting cavity and a connecting groove, a reset component connected to the main body and located within the mounting cavity, a latch connected to the reset component, and a locking component movably disposed relative to the main body. The latch is rotatably disposed on the main body. When the pin is connected to the pin connection structure, the latch fixes the pin in the connecting groove through the locking component. When the pin is disengaged from the pin connection structure, the locking component is operated to release its lock on the latch, and the reset component drives the latch to switch from the locked state to the unlocked state. The latch's original state is an unlocked state, unaffected by the locking component. Therefore, only by releasing the locking component from the latch is it necessary for the latch to automatically return to the unlocked state under the action of the reset component, without the need for continuous force, making the unlocking process relatively effortless.

Description

Technical Field

[0001] This application belongs to the field of mechanical connection structure technology, specifically relating to a pin connection structure and a mechanical tool. Background Technology

[0002] Pin-shaft connection structures are used in mechanical tools, such as tractors, specifically forming a tractor pull rod pin-shaft connection structure, such as... Figure 1 As shown, when the pin is connected to the pin connection structure, since the locking component 1 is connected to a spring, the spring, in its original state, fixes the locking component 1 in place through its own elastic force. Figure 1 As shown, the pin is locked on the connecting part 2. When it is necessary to disengage the pin from the connecting part 2, the pull ring 3 is manually pulled. The pull ring 3 moves the locking part 1, overcoming the spring force. It is necessary to continuously apply force to the pull ring 3 to keep the locking part 1 in the unlocked state. After the pin is disengaged from the connecting part 2, the pull ring 3 is released. This unlocking process is very laborious. Utility Model Content

[0003] The purpose of this application is to provide a pin connection structure and a mechanical tool that can save the force applied to the pin connection structure when the pin is disengaged from the pin connection structure.

[0004] To achieve the above objectives, this application provides a pin connection structure, including a main body having a mounting cavity and a connecting groove, a reset component connected to the main body and located within the mounting cavity, a latch connected to the reset component, and a locking component movably disposed relative to the main body. The latch is rotatably disposed on the main body, and the latch can be fixed in a locked state by the locking component and can be driven to an unlocked state by the reset component. In the locked state, the pin is fixed in the connecting groove by the latch, and in the unlocked state, the pin can disengage from the connecting groove.

[0005] In some implementations, the reset component is elastic; in the locked state, the reset component undergoes elastic deformation, and in the unlocked state, the reset component returns to its original state.

[0006] In some embodiments, a locking hole communicating with the mounting cavity is formed on the main body, and the locking component is formed as a plug-in pin connected to the locking hole. When the pin is inserted into the locking hole (13), it is fixed below the latch to prevent the latch from rotating relative to the main body. When the pin is pulled out of the locking hole, the obstruction to the rotation of the latch is released.

[0007] In some embodiments, the locking component includes an elastic portion connected to the body and a limiting block connected to the elastic portion. The limiting block is driven by the elastic portion to be at least partially located below the latch to prevent the latch from rotating relative to the body. When the elastic portion is driven by the limiting block to undergo elastic deformation, it releases the obstruction to the rotation of the latch.

[0008] In some embodiments, an operating hole communicating with the mounting cavity is formed on the main body, a limiting block is movably disposed in the mounting cavity, and an operating handle protruding from the operating hole to the outer contour of the main body is formed on the limiting block, so as to drive the limiting block by the operating handle.

[0009] In some embodiments, the limiting block is movably disposed within the mounting cavity, the operating hole is formed as an elongated hole, and the extending direction of the operating hole is formed as the moving direction of the limiting block, and the length of the operating hole is formed as the moving length of the limiting block.

[0010] In some embodiments, the operating hole is formed as a circular hole, the limiting block is rotatably disposed in the mounting cavity, and the rotation center of the limiting block is coaxial with the circular hole.

[0011] In some embodiments, the limiting block includes a connecting segment and a blocking segment connected to each other, forming an angle between them. The connecting segment is connected to an elastic part and rotatably connected to the main body, and the blocking segment is driven by the elastic part to be located below the latch.

[0012] In some embodiments, the latch includes a connecting part and a locking part. The connecting part is rotatably connected to the main body, and the locking part has an arc-shaped locking surface facing the bottom of the arc-shaped groove of the connecting groove. The locking part and the connecting groove together form a space for the pin to be accommodated. In the locked state, the locking part fixes the pin in the connecting groove.

[0013] A second aspect of this application provides a mechanical tool including a pin and the aforementioned pin connection structure, wherein the pin is detachably connected to the pin connection structure.

[0014] With the above technical solution, when the pin is connected to the pin connection structure, the latch fixes the pin in the connecting groove through the locking component; when the pin is disengaged from the pin connection structure, the locking component is operated to release its lock on the latch, and the reset component drives the latch to switch from the locked state to the unlocked state. The latch's original state is an unlocked state, unaffected by the locking component. Therefore, only by releasing the locking component from the latch is it possible for the latch to automatically return to the unlocked state under the action of the reset component, without the need for continuous force, making the unlocking process relatively effortless.

[0015] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0017] Figure 1 This is a plan view of the pin connection structure in the background art;

[0018] Figure 2 This is a plan view of the first embodiment of the pin connection structure of this application, wherein the latch is in a locked state;

[0019] Figure 3 for Figure 2 A plan view of the central pin connection structure, wherein the latch is in the unlocked state;

[0020] Figure 4 This is a plan view of a second embodiment of the pin connection structure of this application, wherein the latch is in a locked state;

[0021] Figure 5 for Figure 4 A plan view of the central pin connection structure, wherein the latch is in the unlocked state;

[0022] Figure 6 This is a plan view of a third embodiment of the pin connection structure of this application, wherein the latch is in a locked state;

[0023] Figure 7 for Figure 6 A plan view of the central pin connection structure, in which the latch is in the unlocked state.

[0024] Explanation of reference numerals in the attached figures

[0025] 1-Locking component; 2-Connecting component; 3-Pull ring; 9-Pin;

[0026] 10-Main body; 11-Mounting cavity; 12-Connecting groove; 13-Locking hole; 14-Operating hole;

[0027] 20 - Reset component;

[0028] 30-Lock; 31-Connecting part; 32-Locking part; 33-Locking surface;

[0029] 40-Locking component; 41-Pin; 42-Elastic part; 43-Limiting block; 431-Connecting section; 432-Blocking section; 44-Operating handle. Detailed Implementation

[0030] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0031] Please refer to Figures 2 to 7This application provides a pin connection structure, including a main body 10 having a mounting cavity 11 and a connecting groove 12, a reset component 20 connected to the main body 10 and located in the mounting cavity 11, a latch 30 connected to the reset component 20, and a locking component 40 movably disposed relative to the main body 10. The latch 30 is rotatably disposed on the main body 10. The latch 30 can be fixed in a locked state by the locking component 40 and can be driven to an unlocked state by the reset component 20. In the locked state, the pin 9 is fixed in the connecting groove 12 by the latch 30. In the unlocked state, the pin 9 can disengage from the connecting groove 12.

[0032] When the pin connection structure is connected to the pin 9, the pin 9 is placed in the connecting groove 12, and the locking component 40 fixes the latch 30 in the locked state. The pin 9 is fixed in the connecting groove 12 by the latch 30. When the pin 9 needs to be disengaged from the pin connection structure, the locking component 40 is released from locking the latch 30. The latch 30 automatically returns to the unlocked state under the action of the reset component 20, at which point the pin 9 can be removed from the connecting groove 12. Switching the latch 30 from the locked state to the unlocked state only requires operating the locking component 40, that is, releasing the engagement between the locking component 40 and the latch 30. The latch 30 can then automatically return to the unlocked state. In other words, the original state of the latch 30 is the unlocked state, and there is no need to continuously apply force to the locking component 40, which is relatively labor-saving. Figure 1 In the prior art shown, the original state of the locking component 1 is the locked state. When unlocking, continuous force needs to be applied to the pull ring 3, and the unlocking process is very laborious.

[0033] Please refer to Figures 2 to 7 The reset component 20 is elastic. In the locked state, the reset component 20 undergoes elastic deformation, and in the unlocked state, the reset component 20 returns to its original state.

[0034] In the locked state, the reset component 20 undergoes elastic deformation under the action of the locking component 40 and remains in the position of elastic deformation. In the unlocked state, the force exerted by the locking component 40 on the latch 30 disappears, and the force on the reset component 20 also disappears. The reset component 20 returns to its original state according to its own elastic force, causing the latch 30 to switch to the unlocked state. Figure 3 , Figure 5 and Figure 7 As shown, when the latch 30 is in the unlocked state, the latch 30 can rotate relative to the main body 10, and the pin 9 disengages from the connecting groove 12 during the process. Figure 3 , Figure 5 and Figure 7During the upward and rightward movement of the center pin 9, even if the pin 9 touches the locking buckle 30, it can still push the locking part 32 of the locking buckle 30 to rotate counterclockwise, providing sufficient space for the pin 9 to disengage, thus allowing the pin 9 to smoothly disengage from the connecting groove 12. When the pin connection structure is applied to mechanical tools such as tractors, the operation of pushing the locking part 32 with the pin 9 to disengage from the connecting groove 12 can be achieved by the tractor's own lifting mechanism, without the need for manual operation by the operator.

[0035] The reset component 20 can be a spring, with one end of the spring fixed to the cavity wall of the mounting cavity 11 and the other end fixedly connected to the latch 30.

[0036] Please refer to Figure 2 and Figure 3 The first embodiment of this application has a pin connection structure. The main body 10 has a locking hole 13 that communicates with the mounting cavity 11. The locking member 40 is formed as a pin 41 that can be inserted into the mounting cavity 11 from the locking hole 13. The pin 41 can be driven to be fixed below the latch 30 to prevent the latch 30 from rotating relative to the main body 10. The pin 41 can also be driven to be pulled out of the locking hole 13 to release the obstruction to the rotation of the latch 30.

[0037] During the insertion of the pin 41 from the locking hole 13 into the mounting cavity 11, the pin pushes the connecting part 31 of the latch 30, causing the latch 30 to rotate clockwise. After the pin 41 is fully inserted into the locking hole 13 and fixed, the pin 41 is located below the connecting part 31 of the latch 30. Due to the obstruction of the pin 41, the latch 30 cannot rotate counterclockwise relative to the main body 10, thus fixing the latch 30 in the locked state. When the pin 41 is pulled out of the locking hole 13, the force exerted on the latch 30 by the pin 41 disappears, and the reset component 20, due to its own elasticity, causes the latch 30 to rotate counterclockwise to the unlocked state. The operation of pulling the pin 41 out of the locking hole 13 does not require continuous force, that is, the operator can switch the latch 30 from the locked state to the unlocked state with a small amount of force, making the operation labor-saving and convenient.

[0038] by Figure 2 Described in the indicated orientation, when the latch 30 is in the locked state, it is subjected to a downward pulling force from the reset component 20 and an upward supporting force from the pin 41. The pulling force of the reset component 20 is less than or equal to the supporting force of the pin 41, thus ensuring that the pin 41 can prevent the latch 30 from rotating counterclockwise. When the pin 41 is pulled out from the locking hole 13, the supporting force of the pin 41 disappears, and the latch 30 is only subjected to the pulling force of the reset component 20, which drives the latch 30 to rotate counterclockwise to the unlocked state.

[0039] Please refer to Figures 4 to 7The pin connection structure of the second and third embodiments of this application includes a locking component 40, which includes an elastic part 42 connected to the main body 10 and a limiting block 43 connected to the elastic part 42. The limiting block 43 can be driven by the elastic part 42 to be at least partially located below the latch 30 to prevent the latch 30 from rotating relative to the main body 10. The limiting block 43 can also be driven to cause the elastic part 42 to undergo elastic deformation to release the obstruction to the rotation of the latch 30.

[0040] In its original length state, the limiting block 43 is entirely or partially located below the connecting portion 31 of the latch 30. Due to the obstruction of the limiting block 43, the latch 30 cannot rotate counterclockwise relative to the main body 10, thereby fixing the latch 30 in a locked state. When the limiting block 43 is driven away from the latch 30 ( Figure 4 and Figure 5 From the center to the left, Figure 6 and Figure 7 When the latch 30 moves or rotates clockwise, the limiting block 43 disengages from below the connecting part 31 of the latch 30, the force exerted on the latch 30 by the limiting block 43 disappears, and it rotates counterclockwise to the unlocked state under the action of the reset component 20. When the operator applies force to the limiting block 43, after the limiting block 43 disengages from below the connecting part 31 of the latch 30, the latch 30 can automatically switch to the unlocked state, at which point the limiting block 43 can be released without continuously applying force to the limiting block 43, making the operation labor-saving and convenient.

[0041] The elastic part 42 can be a spring, with one end of the spring fixed to the cavity wall of the mounting cavity 11 and the other end fixedly connected to the limiting block 43.

[0042] Please continue reading. Figures 4 to 7 The main body 10 has an operation hole 14 that communicates with the mounting cavity 11. The limiting block 43 is movably disposed in the mounting cavity 11, and the limiting block 43 has an operation handle 44 that protrudes from the operation hole 14 to the outline of the main body 10, so as to drive the limiting block 43 through the operation handle 44.

[0043] The operating handle 44 allows the operator to apply force to the limiting block 43, moving the limiting block 43 below the connecting part 31 of the disengaged latch 30. The latch 30 then... Figure 5 or Figure 7 The unlock status shown has switched to Figure 4 or Figure 6 In the locked state shown, the pin 9 moves downwards to reach the connecting groove 12, and at the same time, the pin 9 presses down on the lower part of the locking part 32 of the latch 30 that protrudes from the mounting cavity 11 into the connecting groove 12, so that the lower part of the locking part 32 enters the mounting cavity 11, thereby causing the latch 30 to rotate clockwise to the locked position. At this time, the limiting block 43 is moved to the right by the elastic force generated by the elastic part 42 returning to its original state. Figure 4 and Figure 5 The second embodiment shown) or rotated counterclockwise ( Figure 6 and Figure 7 (As shown in the third embodiment) the latch 30 is fixed in the locked position by pressing the lower part of the locking part 32 with the pin 9 below the connecting part 31. When the pin connection structure is applied to a mechanical tool such as a tractor, the operation of pressing the lower part of the locking part 32 with the pin 9 to make the part enter the mounting cavity 11 can be achieved by the lifting mechanism of the tractor itself, without the need for manual operation by the operator.

[0044] Please refer to Figure 4 and Figure 5 The pin connection structure of the second embodiment of this application is provided. The limiting block 43 is movably disposed in the mounting cavity 11. The operating hole 14 is formed as an elongated hole, and the extension direction of the operating hole 14 is formed as the moving direction of the limiting block 43. The extension length of the operating hole 14 is formed as the moving length of the limiting block 43.

[0045] In this embodiment, the limiting block 43 is a long strip-shaped structure, and the operating handle 44 is a plate-shaped structure. The extension directions of the two are perpendicular to each other. Figure 4 and Figure 5 As shown in the diagram, the upper and lower ends of the operating handle 44 protrude from the upper and lower sides of the operating hole 14, so that the cooperation between the operating handle 44 and the operating hole 14 can limit the movement direction of the limiting block 43, that is, ensure that the limiting block 43 can move along the extension direction of the operating hole 14, and prevent the limiting block 43 from shifting up and down.

[0046] Please refer to Figure 6 and Figure 7 This is a pin connection structure according to the third embodiment of this application. The operating hole 14 is formed as a circular hole, and the limiting block 43 is rotatably disposed in the mounting cavity 11. The rotation center of the limiting block 43 is coaxial with the circular hole.

[0047] In this embodiment, the operating handle 44 is a plate-like structure, so as to... Figure 6 and Figure 7 As shown in the diagram, the upper and lower ends of the operating handle 44 protrude from the outer periphery of the operating hole 14 to prevent the limiting block 43 from rotating away from the operating hole 14.

[0048] Please continue reading. Figure 6 and Figure 7 The limiting block 43 includes a connecting section 431 and a blocking section 432 that are connected to each other and form an angle between them. The connecting section 431 is connected to the elastic part 42 and is rotatably connected to the main body 10. The blocking section 432 can be driven by the elastic part 42 to be located below the latch 30.

[0049] The connecting section 431 is rotatably connected to the cavity wall of the mounting cavity 11, with the center of rotation of both located on one side of the connecting section. The other side of the connecting section 431 is connected to the operating handle 44. Figure 6 and Figure 7 Described in the indicated orientation, the elastic part 42 is disposed at the upper end of the connecting section 431, and the blocking section 432 is disposed at the lower end of the connecting section 431, and the two can be integrally formed. The connecting section 431 and the blocking section 432 are perpendicular, and their shape can be part of a ratchet.

[0050] Please refer to Figures 1 to 7 The latch 30 includes a connecting part 31 and a locking part 32. The connecting part 31 is rotatably connected to the main body 10. The locking part 32 has an arc-shaped locking surface 33 facing the arc-shaped bottom of the connecting groove 12. The locking part 32 and the connecting groove 12 together form a space for the pin 9 to be accommodated. In the locked state, the locking part 32 fixes the pin 9 in the connecting groove 12.

[0051] The arc of the locking surface 33 of the locking part 32 and the bottom of the connecting groove 12 is adapted to the pin 9. On the one hand, this allows the pin 9 to smoothly fit with the locking surface 33 of the locking part 32 and the bottom of the connecting groove 12, reducing the wear of the pin 9 by the latch 30. On the other hand, a circular space adapted to the cross-sectional shape of the pin 9 can be formed between the locking surface 33 of the locking part 32 and the bottom of the connecting groove 12, which is used to accommodate the pin 9.

[0052] The mounting cavity 11 has an opening on the side facing the connecting groove 12, which connects the mounting cavity 11 and the connecting groove 12. This allows the locking part 32 of the latch 30 to enter and exit the mounting cavity 11 through the opening. Specifically, in the locked state, the upper part of the locking part 32 protrudes from the connecting groove 12 through the opening, and the lower part enters the mounting cavity 11 through the opening. In the unlocked state, the upper part of the locking part 32 enters the mounting cavity 11 through the opening to avoid the pin 9, providing sufficient movement space for the pin 9 to disengage. The lower part protrudes from the opening from the connecting groove 12 so that the pin 9 can press the lower part of the locking part 32 when it enters the connecting groove 12 again. In addition, the opening also facilitates the formation of the mounting cavity 11, that is, during the manufacturing process of the main body 10, the mounting cavity 11 is opened from the location of the opening into the interior of the main body 10.

[0053] This application also provides a mechanical tool, including a pin 9 and the aforementioned pin connection structure, wherein the pin 9 is detachably connected to the pin connection structure.

[0054] Among them, the mechanical tools can be tractors.

[0055] It should be noted that, in this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower parts of the corresponding figures. "Inner" and "outer" refer to the inner and outer contours of the corresponding parts.

[0056] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In the description of this specification, references to terms such as "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A pin connection structure, characterized in that, The device includes a main body (10) having a mounting cavity (11) and a connecting groove (12), a reset component (20) connected to the main body (10) and located in the mounting cavity (11), a latch (30) connected to the reset component (20), and a locking component (40) movably disposed relative to the main body (10). The latch (30) is rotatably disposed on the main body (10). The latch (30) is fixed in a locked state by the locking component (40) and driven to an unlocked state by the reset component (20). In the locked state, the pin (9) is fixed in the connecting groove (12) by the latch (30). In the unlocked state, the pin (9) is disengaged from the connecting groove (12).

2. The pin connection structure according to claim 1, characterized in that, The reset component (20) is elastic. In the locked state, the reset component (20) undergoes elastic deformation. In the unlocked state, the reset component (20) returns to its original state.

3. The pin connection structure according to claim 1, characterized in that, The main body (10) has a locking hole (13) communicating with the mounting cavity (11). The locking component (40) is formed as a plug-in pin (41) connected to the locking hole (13). When the pin (41) is inserted into the locking hole (13), it is fixed below the latch (30) to prevent the latch (30) from rotating relative to the main body (10). When the pin (41) is pulled out of the locking hole (13), the obstruction to the rotation of the latch (30) is released.

4. The pin connection structure according to claim 1, characterized in that, The locking component (40) includes an elastic part (42) connected to the body (10) and a limiting block (43) connected to the elastic part (42). The limiting block (43) is driven by the elastic part (42) to be at least partially located below the latch (30) to prevent the latch (30) from rotating relative to the body (10). When the elastic part (42) is driven by the limiting block (43) to undergo elastic deformation, it releases the obstruction to the rotation of the latch (30).

5. The pin connection structure according to claim 4, characterized in that, The main body (10) has an operation hole (14) communicating with the mounting cavity (11). The limiting block (43) is movably disposed in the mounting cavity (11), and the limiting block (43) has an operation handle (44) protruding from the operation hole (14) to the outline of the main body (10) so as to drive the limiting block (43) through the operation handle (44).

6. The pin connection structure according to claim 5, characterized in that, The limiting block (43) is movably disposed in the mounting cavity (11), the operating hole (14) is formed as an elongated hole, and the extension direction of the operating hole (14) is formed as the moving direction of the limiting block (43), and the length of the operating hole (14) is formed as the moving length of the limiting block (43).

7. The pin connection structure according to claim 5, characterized in that, The operating hole (14) is formed as a circular hole, and the limiting block (43) is rotatably disposed in the mounting cavity (11), and the rotation center of the limiting block (43) is coaxial with the circular hole.

8. The pin connection structure according to claim 5, characterized in that, The limiting block (43) includes a connecting section (431) and a blocking section (432) that are connected to each other, forming an angle between them. The connecting section (431) is connected to the elastic part (42) and rotatably connected to the main body (10). The blocking section (432) is driven by the elastic part (42) to be located below the latch (30).

9. The pin connection structure according to claim 5, characterized in that, The latch (30) includes a connecting part (31) and a locking part (32). The connecting part (31) is rotatably connected to the main body (10). The locking part (32) has an arc-shaped locking surface (33) facing the arc-shaped bottom of the connecting groove (12). The locking part (32) and the connecting groove (12) together form a space for the pin (9) to be accommodated. In the locked state, the locking part (32) fixes the pin (9) in the connecting groove (12).

10. A machine tool, characterized in that, It includes a pin (9) and a pin connection structure according to any one of claims 1 to 9, wherein the pin (9) is detachably connected to the pin connection structure.

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