Length-adjustable locking pin

Abstract

The application discloses a length-adjustable locking pin, which comprises coaxially distributed shaft-shaped housings, pin rods and adjusting knobs, the shaft-shaped housings are provided with first guide channels at one end along a central axis, the first guide channels are symmetrically provided with at least two strip-shaped guide grooves extending along the axial direction in the circumferential direction, the pin rods are matched with the first guide channels and are vertically connected with guide protrusions matched with the strip-shaped guide grooves, the pin rods are provided with internal thread channels at the central axis position, the adjusting knobs are rotatably arranged at the other end of the shaft-shaped housings, the adjusting knobs are vertically connected with adjusting rods at the central axis position, the adjusting rods penetrate through the shaft-shaped housings and are provided with external threads matched with the internal thread channels, the adjusting knobs are provided with locking members, so that the adjusting knobs can be fixed on the shaft-shaped housings after being rotated to the position, and the locking pin can be flexibly adjusted in a certain length range, and the structure is more stable and solves the problem of poor assembly adaptability of the traditional locking pin.

Description

Technical Field

[0001] This utility model relates to the field of locking equipment technology, and in particular to a locking pin with adjustable length. Background Technology

[0002] Locking pins are widely used in various industrial fields such as aerospace, automotive, electronics, medical and defense, mainly to fix and position workpieces, thereby improving production efficiency and work efficiency.

[0003] In existing technologies, locking pins have a fixed length. Therefore, the locking length of locking pins may vary in different application environments. This requires companies to keep a variety of locking pin specifications in stock, resulting in high equipment and management costs. At the same time, traditional standard locking pins cannot be adapted to non-standard hole spacing or holes that have been enlarged after wear. They generally require shims for assistance, have poor stability, and are easy to lose. Utility Model Content

[0004] This application provides an adjustable locking pin, which can flexibly adjust the locking length within a certain length range, thereby solving the problem of poor assembly adaptability caused by the fixed length of traditional locking pins. At the same time, compared with the form of shims, its structure is more stable and less likely to be lost.

[0005] This application provides an adjustable locking pin, comprising a shaft-shaped housing, a pin, and an adjusting knob coaxially distributed. The shaft-shaped housing has a first guide channel at one end along its central axis. At least two strip-shaped guide grooves are symmetrically arranged circumferentially within the first guide channel, extending axially. The pin engages with the first guide channel and is vertically connected to a guide protrusion that engages with the strip-shaped guide groove. The pin has an internal threaded channel at its central axis position. The adjusting knob is rotatably disposed at the other end of the shaft-shaped housing. An adjusting rod is vertically connected to the adjusting knob at its central axis position. The adjusting rod passes through the shaft-shaped housing and has an external thread that engages with the internal threaded channel. The adjusting knob has a locking element to fix it to the shaft-shaped housing after it has been rotated to its position.

[0006] In one possible implementation, the number of the strip guide grooves is 2-4.

[0007] In one possible implementation, the adjusting rod is vertically connected to an anti-detachment plate, and the shaft-shaped housing has an annular anti-detachment groove along the circumferential direction at the bottom of the first guide channel, the annular anti-detachment groove cooperating with the anti-detachment plate.

[0008] In one possible implementation, the annular anti-detachment groove is flush with the strip guide groove.

[0009] In one possible implementation, the locking element includes a pressing rod. The adjusting knob, in conjunction with the adjusting rod, has a pressing channel at the central axis position at the end away from the first guide channel. The pressing channel cooperates with the pressing rod. The side of the pressing rod has receiving grooves at opposite ends. A locking ball is connected to the receiving groove by a spring. The shaft-shaped housing has an annular locking groove along the circumference at the end near the adjusting knob, suitable for receiving the locking ball. The adjusting rod has through holes symmetrically provided opposite the annular locking groove, which cooperate with the locking ball.

[0010] In one possible implementation, the pressing channel consists of a second guide channel and a limiting channel, wherein the limiting channel is located at the end of the adjusting knob. The locking member further includes a fixing block and an elastic member. The fixing block is used to block the limiting channel. The pressing rod extends from the outside through the fixing block into the second guide channel. The pressing rod is vertically connected to the second limiting member, which cooperates with the limiting channel. When the second limiting member abuts against the fixing block, the receiving groove is directly opposite the second guide channel and is located between the annular locking groove and the limiting channel. The elastic member is sleeved on the pressing rod and elastically connected between the inner end of the second limiting member and the limiting channel.

[0011] In one possible implementation, the second limiting member is a limiting plate integrally formed with the pressing rod.

[0012] In one possible implementation, the adjusting rod is symmetrically provided with at least two sets of the through holes.

[0013] Beneficial effects: Compared with the prior art, the adjustable locking pin provided in this application flexibly adjusts the extension length of the pin by rotating the adjustment knob through the cooperation of the shaft-shaped housing, the pin rod, and the adjustment knob, thus flexibly adjusting the locking length of the locking pin. After adjustment, it is fixed by the locking element, so that the locking pin is fixed at this locking length. Compared with the existing fixed-length locking pins, the locking pin provided in this application has stronger assembly and adaptation capabilities, and can be stocked in large quantities with only corresponding adjustments and adaptations required during use. At the same time, compared with the shim-assisted form, its structure is more stable and less likely to be lost.

[0014] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0015] Figure 1 A three-dimensional structural schematic diagram of the adjustable-length locking pin of this application is shown.

[0016] Figure 2A cross-sectional view of the adjustable locking pin of this application in its initial state is shown.

[0017] Figure 3 A cross-sectional view of the adjustable locking pin of this application in the locked state is shown.

[0018] Figure 4 A three-dimensional structural diagram of the adjustable locking pin of this application when extended is shown. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0020] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] refer to Figures 1 to 4This application provides an adjustable-length locking pin, comprising a shaft-shaped housing 10, a pin 20, and an adjusting knob 30 coaxially distributed. The shaft-shaped housing 10 has a first guide channel 101 at one end (e.g., the left end) along its central axis. Simultaneously, the first guide channel 101 has at least two strip-shaped guide grooves 102 symmetrically arranged circumferentially, and the strip-shaped guide grooves 102 extend axially. The pin 20 cooperates with the first guide channel 101 and is vertically connected to a guide protrusion 21 that cooperates with the strip-shaped guide grooves 102. The guide protrusion 21 limits the maximum extension length of the pin 20, or the maximum locking length of the locking pin, preventing the pin 20 from disengaging from the shaft-shaped housing 10. The pin 20 has an internal threaded channel 201 at its central axis position. The adjustment knob 30 is rotatably disposed at the other end of the shaft-shaped housing 10, i.e. the right end of the shaft-shaped housing 10. At the same time, the adjustment knob 30 is vertically connected to the adjustment rod 31 at the central axis position. The adjustment rod 31 passes through the shaft-shaped housing 10 and is provided with an external thread that is threadedly engaged with the internal thread channel 201. The adjustment knob 30 is provided with a locking member so that the adjustment knob 30 can be fixed on the shaft-shaped housing 10 after it is rotated to the correct position.

[0023] In simple terms, in the initial state, the adjustment knob 30 is rotatable. Based on the threaded engagement between the adjustment rod 31 on the adjustment knob 30 and the pin 20, under the cooperation of the guide protrusion 21 and the strip guide groove 102, as the adjustment knob 30 is rotated, the pin 20 will extend out from the shaft housing 10. After the pin 20 extends into place, the adjustment knob 30 is fixed to the shaft housing 10 by the locking member to prevent the adjustment knob 30 from rotating again, so that the locking pin can be fixed at the predetermined locking length. The cooperation between the guide protrusion 21 and the strip guide groove 102 can ensure that the pin 20 will not detach from the shaft housing 10, and at the same time, it can prevent the pin 20 from rotating synchronously when the adjustment knob 30 is rotated. This ensures that the rotational movement of the adjustment knob 30 is converted into the axial movement of the pin 20, and the locking pin is flexibly adjusted to the appropriate locking length.

[0024] Compared to existing technologies, this locking pin allows enterprises to maintain bulk inventory, reducing the number of stock sizes and lowering equipment and management costs. During use, the locking length of the pin (i.e., the extension length of the pin 20) only needs to be flexibly adjusted according to the application scenario. After adjustment, it is locked in place by a locking component. Compared to shim-assisted methods, its structure is more stable. Therefore, the locking pin provided in this application has stronger assembly adaptability and can be flexibly adjusted within the adjustable stroke range.

[0025] To ensure the stability of the pin 20's movement and the structural stability of the shaft housing 10, the number of the strip guide grooves 102 should not be too many or too few. Therefore, the number of the strip guide grooves 102 is preferably 2-4.

[0026] In one embodiment, the adjusting rod 21 is vertically connected to the anti-detachment plate 22, and the shaft-shaped housing 10 is provided with an annular anti-detachment groove 103 along the circumferential direction at the bottom of the first guide channel 101. The annular anti-detachment groove 103 cooperates with the anti-detachment plate 22, thereby restricting the adjusting knob 30 to the shaft-shaped housing 10 through the cooperation of the annular anti-detachment groove 103 and the anti-detachment plate 22. This does not affect the normal rotation of the adjusting knob 30, and at the same time, the adjusting knob 30 will not detach from the shaft-shaped housing 10, making it more convenient to use.

[0027] More preferably, the annular anti-detachment groove 103 is flush with the strip guide groove 102 to facilitate the processing of the annular anti-detachment groove 103 and the strip guide groove 102.

[0028] In one embodiment, the locking element includes a pressing rod 41. The adjusting knob 30, in conjunction with the adjusting rod 21, has a pressing channel 301 at its central axis position at the end furthest from the first guide channel 101. The pressing channel 301 engages with the pressing rod 41. Simultaneously, the side of the pressing rod 41 has receiving grooves 401 at opposite ends, and a locking ball 42, such as a steel ball, is connected to the receiving groove 401 by a spring. Correspondingly, the shaft-shaped housing 10 has an annular locking groove 104 circumferentially arranged at the end near the adjusting knob 30, suitable for accommodating the locking ball 42. The adjusting rod 31 has symmetrical through holes 302 commensurate with the locking ball 42 at the position opposite the annular locking groove 104. In the initial state, the locking bead 42 is confined within the receiving groove 401 by the pressing channel 301. When the adjusting knob 30 is rotated to its final position, the pressing rod 41 is manually pressed inward, aligning the locking bead 42 with the through hole 302. Under the spring's rebound, the locking bead 42 rebounds, with one part of it positioned within the through hole 302 and the other part within the annular locking groove 104, thus securing the adjusting knob 30. If the receiving groove 401 cannot be aligned with the through hole 302 due to the rotation of the adjusting knob 30, the pressing rod 41 can be rotated appropriately after being pressed to its final position, aligning the receiving groove 401 with the through hole 302. When the pressing rod 41 can no longer move axially, it indicates that the locking bead 42 is simultaneously located within both the through hole 302 and the annular locking groove 104.

[0029] In one embodiment, the adjusting rod 31 is symmetrically provided with at least two sets of through holes 302, wherein each set of through holes 302 consists of two through holes 302 symmetrically distributed in the circumferential direction. By providing multiple sets of through holes 302, the locking bead 42 on the rod 41 can quickly enter the annular locking groove 104 to complete the locking action when the rod 41 is rotated.

[0030] In some cases, to ensure precise fixation of the adjustment knob 30, the locking bead 42 can also be designed as a square locking pin. Correspondingly, the receiving groove 401 is a square groove and the through hole 302 is a square hole. In the locked state, part of the locking pin passes through the through hole 302 and is located inside the through hole 302, while part of it is embedded in the annular locking groove 104, resulting in good locking stability.

[0031] In one embodiment, the pressing channel 301 comprises a second guide channel 3011 and a limiting channel 3012, wherein the limiting channel 3012 is located at the end of the adjusting knob 30, and the second guide channel 3011 is located inside the limiting channel 3012. The locking member further includes a fixing block 43 and an elastic member 44, wherein the fixing block 43 is used to block the limiting channel 3012 from the outside, and wherein the pressing rod 41 extends from the outside through the fixing block 43 into the second guide channel 3011. Simultaneously, the pressing rod 41 is vertically connected to a second limiting member 45, wherein the second limiting member 45 cooperates with the limiting channel 3012, and when the second limiting member 45 abuts against the fixing block 43, the receiving groove 401 faces the second guide channel 3011 and is located between the annular locking groove 104 and the limiting channel 3012, wherein the elastic member 44 is sleeved on the pressing rod 41. The upper part is elastically connected between the second limiting member 45 and the inner end of the limiting channel 3012. In this way, under the cooperation of the fixing block 43 and the second limiting member 45, the pressing rod 41 can be restricted to the adjusting knob 30, that is, the pressing rod 41 will not disengage from the adjusting knob 30, which facilitates the pressing operation. On the other hand, under the action of the elastic member 44 and the second limiting member 45, the locking bead 42 can be limited, so that the locking bead 42 will not move outward and disengage from the second guide channel 3011 into the limiting channel 3012 in the initial state, nor will it move inward and disengage from the second guide channel 3011 into the locking groove 104, unless subjected to external pressure.

[0032] In one embodiment, the second limiting member 45 is a limiting plate integrally formed with the pressing rod 41.

[0033] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0034] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A locking pin with adjustable length, characterized in that, The device includes a shaft-shaped housing, a pin, and an adjusting knob, all coaxially distributed. The shaft-shaped housing has a first guide channel at one end along its central axis. At least two strip-shaped guide grooves are symmetrically arranged circumferentially within the first guide channel, extending axially. The pin engages with the first guide channel and is vertically connected to a guide protrusion that engages with the strip-shaped guide groove. The pin has an internal threaded channel at its central axis position. The adjusting knob is rotatably mounted at the other end of the shaft-shaped housing. An adjusting rod is vertically connected to the adjusting knob at its central axis position. The adjusting rod passes through the shaft-shaped housing and has an external thread that engages with the internal threaded channel. The adjusting knob has a locking element to fix it to the shaft-shaped housing after it has been rotated to its designated position.

2. The length-adjustable locking pin as described in claim 1, characterized in that, The number of the strip guide grooves is 2-4.

3. The length-adjustable locking pin as described in claim 1 or 2, characterized in that, The adjusting rod is vertically connected to an anti-detachment plate, and the shaft-shaped housing has an annular anti-detachment groove along the circumferential direction at the bottom of the first guide channel. The annular anti-detachment groove cooperates with the anti-detachment plate.

4. The length-adjustable locking pin as described in claim 3, characterized in that, The annular anti-detachment groove is flush with the strip-shaped guide groove.

5. The length-adjustable locking pin as described in claim 1, characterized in that, The locking component includes a pressing rod. The adjusting knob, in conjunction with the adjusting rod, has a pressing channel at the central axis position at the end away from the first guide channel. The pressing channel cooperates with the pressing rod. The side of the pressing rod has receiving grooves at opposite ends. A locking ball is connected to the receiving groove by a spring. The shaft-shaped housing has an annular locking groove along the circumference at the end near the adjusting knob, suitable for receiving the locking ball. The adjusting rod has symmetrical through holes that cooperate with the locking ball at the position directly opposite the annular locking groove.

6. The length-adjustable locking pin as described in claim 5, characterized in that, The pressing channel consists of a second guide channel and a limiting channel, wherein the limiting channel is located at the end of the adjusting knob. The locking member further includes a fixing block and an elastic member. The fixing block is used to block the limiting channel. The pressing rod extends from the outside through the fixing block into the second guide channel. The pressing rod is vertically connected to the second limiting member. The second limiting member cooperates with the limiting channel. When the second limiting member abuts against the fixing block, the receiving groove is directly opposite the second guide channel and is located between the annular locking groove and the limiting channel. The elastic member is sleeved on the pressing rod and elastically connected between the inner end of the second limiting member and the limiting channel.

7. The length-adjustable locking pin as described in claim 6, characterized in that, The second limiting member is a limiting plate integrally formed with the pressing rod.

8. The length-adjustable locking pin as described in claim 5, characterized in that, The adjusting rod is symmetrically provided with at least two sets of through holes.

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