Pin shaft connecting piece

Abstract

The invention relates to the technical field of door and window mounting and connecting structures, in particular to a pin shaft connecting piece which comprises a first fixing plate and a second fixing plate, two mounting lugs are fixedly mounted on the first fixing plate in a spaced mode, an inserting space is formed between the two mounting lugs, circular grooves are formed in the mounting lugs, openings of the two grooves are oppositely formed, and the two mounting lugs are fixedly connected with the second fixing plate. And first pin shafts are slidably installed in the grooves, pushing springs are arranged in the grooves, a protruding part is fixedly installed on the second fixing plate, and first pin holes are formed in the top and the bottom of the protruding part. After the first fixing plate and the second fixing plate are fixedly installed on the door frame and the door plate correspondingly, the protruding part on the second fixing plate is inserted into the inserting space of the first fixing plate, and then the first pin shaft in the groove pops up under the action of the pushing spring and is inserted into the first pin hole of the protruding part; the door plate and the door frame can be quickly and rotatably connected, and the convenience during door installation is improved.

Description

Technical Field

[0001] The invention relates to the technical field of door and window installation connection structures, in particular to a pin connector. Background Art

[0002] Pin connectors are primarily used to connect rotating parts, acting as pivots. Pin connectors are also used during door and window installation to allow them to open and close. For example, hinges currently used for door and window installations also have a pin as the pivot.

[0003] At present, when doors are installed, hinges are generally used. The installation positions of the hinges are measured and located on the door frame and door panel in advance, and then one leaf of the hinge is fixedly connected to the measured hinge installation position on the door panel by bolts. Then, the other leaf of the hinge installed on the door panel is aligned with the measured hinge installation position on the door frame, and then the leaf is fixedly connected to the door frame by bolts to connect the door panel and the door frame.

[0004] During this process, securing the hinged leaf of the door panel to the door frame requires lifting the door panel while keeping its sides parallel to the door frame. Meanwhile, screws must be threaded through the hinge leaf and screwed into the door frame. Furthermore, door panels are often quite heavy, especially solid wood doors, making it difficult for one person to lift the panel and tighten the screws simultaneously. This results in a longer installation time for one person, or requires the coordination of two people.

[0005] To this end, a pin connector is proposed to improve the installation convenience of the door during installation, thereby improving the installation efficiency of the door. Summary of the Invention

[0006] The purpose of the present invention is to provide a pin connector to improve the convenience of door installation, so as to solve the problem of difficulty in door installation by a single person and improve the door installation efficiency.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A pin shaft connection member includes a first fixing plate for fixedly connected to a door frame and a second fixing plate for fixedly connected to a door panel, two mounting ears are fixedly installed at intervals on the first fixing plate, the two mounting ears are symmetrically arranged about the horizontal center plane of the first fixing plate, and an insertion space is formed between the two mounting ears, and a circular groove is provided on the mounting ears, the axes of the two grooves coincide with each other, and the openings of the two grooves are arranged opposite to each other, and a first pin shaft matching the groove is slidably installed inside the groove, and a push spring is provided inside the groove, and the push spring is used to push the first pin shaft toward the outside of the groove; a protrusion for being inserted into the insertion space is fixedly installed on the second fixing plate, and the top and bottom of the protrusion are provided with a first pin hole matching the first pin shaft.

[0009] When the door panel and door frame are connected and installed with each other using the plug-in structure, the installation positions of the first fixing plate and the second fixing plate are first located on the door frame and door panel by measurement. The first fixing plate is then fixed to the predetermined installation position on the door frame with screws, and the second fixing plate is fixed to the predetermined installation position on the door panel with screws. Subsequently, the protrusion on the second fixing plate of the door panel only needs to be inserted into the insertion space on the first fixing plate, and the two first pin holes of the protrusion are aligned with the two first pin shafts on the first fixing plate. Subsequently, the two first pin shafts are respectively inserted into the inside of the two first pin holes under the action of two push springs. In this way, there is no need to lift the door panel and keep the side of the door panel parallel to the side of the door frame when connecting the door panel to the door frame, while manually tightening the screws to fix the hinge to the door frame. This facilitates the connection and installation between the door panel and the door frame, and improves the convenience and efficiency of door installation.

[0010] Preferably, an inner hole is coaxially opened on the first pin shaft, an internal thread is provided on the inner hole, a second pin shaft is also provided at the inner hole, the second pin shaft is provided with an external thread that can engage with the internal thread, and one end of the second pin shaft passes through the bottom of the groove and extends outside the groove; a second pin hole is coaxially provided in the pin hole, and the inner diameter of the second pin hole is the same as the diameter of the second pin shaft.

[0011] To facilitate the retraction of the first pin into the groove when the protrusion on the second fixing plate is inserted into the insertion space, ensuring ease of use, the first pin should not be too long. The length of the first pin inserted into the first pin hole on the protrusion determines the strength of the connection between the first and second fixing plates. The further the first pin can be inserted into the first pin hole, the stronger the connection between the first and second fixing plates.

[0012] To address this issue, a second pin and second pin hole are provided. The second pin extends the length of the first pin, allowing it to be inserted deeper into the protrusion, improving the connection strength between the first and second fixing plates and ensuring the stability of the connection between the door panel and the door. The second pin is threadedly connected to the first pin, preventing it from detaching. The threaded connection also prevents relative rotation between the first and second fixing plates around the axis of the first pin.

[0013] One end of the second pin extends through the bottom of the groove and out of the groove, making it easier to pull the first pin out of the way when inserting the protrusion into the insertion space, further improving the ease of use of the pin connector. After the second pin is rotated along the thread and inserted into the second pin hole, the portion of the second pin exposed outside the groove is also stored, saving space while maintaining an aesthetically pleasing appearance.

[0014] Preferably, a plurality of slots are provided at one end of the first pin shaft facing the horizontal center plane of the first fixed plate, and the plurality of slots are evenly distributed on the first pin shaft with the axis of the first pin shaft as the reference circumference, and a plurality of blocks are provided at the bottom of the first pin hole, and the plurality of blocks are evenly distributed in the first pin hole with the axis of the first pin hole as the reference circumference. The arrangement of the slots and blocks utilizes the blocks to be inserted into the card slot to prevent the first pin shaft from rotating inside the first pin hole. This facilitates the situation that when the second pin shaft is twisted to insert the second pin shaft into the second pin hole, the friction between the first pin shaft and the groove is insufficient and the first pin shaft rotates together with the second pin shaft, thereby causing the second pin shaft to be unable to be smoothly inserted into the second pin hole. This helps to further improve the stability of the pin shaft connector.

[0015] Although the first pin shaft cannot rotate relative to the first pin hole inside the first pin hole, the first pin shaft can rotate relative to the groove inside the groove, so it will not affect the rotational connection between the door panel and the door frame.

[0016] Preferably, a plurality of springs are provided on the end face of one end of the second pin shaft facing the horizontal center plane of the first fixed plate, and the plurality of springs are evenly distributed around the circumference with the axis of the second pin shaft as a reference, and an inclined angle is formed between the springs and the end face of the second pin shaft, and the projections of the springs on the end face of the second pin shaft are all located within the diameter of the second pin shaft, and the plurality of springs together form a trumpet shape, with the large end of the trumpet shape facing the horizontal center plane of the first fixed plate, and an annular groove is provided at the bottom of the second pin hole, the annular groove is coaxial with the second pin hole and flush with the bottom of the second pin hole, and the diameter of the annular groove is larger than the diameter of the second pin hole.

[0017] When the second pin shaft approaches the bottom of the second pin hole, the spring will come into contact with the bottom of the second pin hole, and as the second pin shaft gradually moves toward the bottom of the second pin hole, the spring will be squeezed against the bottom of the second pin hole. Due to the inclined angle between the spring and the end face of the second pin shaft, the spring will extend out of the diameter of the end face of the second pin shaft and get stuck in the annular groove after being squeezed. This can effectively prevent the push spring from vibrating when the door panel rotates, causing the second pin shaft to shake inside the second pin hole. This helps to ensure the stability of the second pin shaft during use, and thus ensure the stability of the door after installation. It can also prevent the second fixed plate fixed to the door panel from driving the second pin shaft to rotate relative to the first fixed plate when the door rotates, causing the second pin shaft to disengage from the second pin hole along the thread. This ensures the stability of the pin shaft connection during use.

[0018] Preferably, a conical portion is further provided on the end surface of the second pin shaft facing the horizontal center plane of the first fixed plate. The conical portion is located at the center of a plurality of spring leaves, and the axis of the conical portion is aligned with the axis of the second pin shaft. The tip of the conical portion is directed toward the horizontal center plane of the first fixed plate, and a conical groove corresponding to the conical portion is further provided at the bottom of the second pin hole. The pointed cone portion and the conical groove can play a guiding role. Inserting the conical portion into the conical groove helps to align the axis of the second pin shaft with the axis of the second pin hole, thereby avoiding shaking of the second fixed plate when rotating around the axis of the second pin shaft, and ensuring the stability of the door rotation after installation. In addition, due to the provision of the conical portion and the conical groove, the matching accuracy requirements of the second pin shaft and the second pin hole are reduced, thereby reducing the processing accuracy requirements of the second pin hole and the second pin shaft, saving processing costs.

[0019] Preferably, a sealing film is provided in the middle of the second pin hole, isolating the tapered groove and annular groove from the first pin hole and forming a storage chamber within which thread sealant is stored. The thread sealant is sealed and stored within the storage chamber. As the second pin gradually enters the second pin hole, the conical portion at the top of the second pin pierces the sealing film, allowing the thread sealant to contact the threads on the second pin and fill the gap in the external thread on the second pin. Simultaneously, the thread sealant enters the gap between the second pin and the second pin hole, filling the gap and further improving the fit between the second pin and the protrusion, thereby enhancing the stability of the connection. Furthermore, since the gap between the second pin and the second pin hole is filled, it effectively prevents damage to the second pin hole caused by insufficient fit during door rotation. This further reduces the required fit precision between the second pin and the second pin hole, reduces processing costs, and increases the service life of the second pin. The thread sealant also reduces the second pin's contact with air, reducing rust on the second pin.

[0020] Storing thread glue inside the second pin hole through a storage chamber can improve the convenience of door installation. Because the second pin is connected to the internal thread of the first pin via an external thread, if the thread glue is applied directly to the external thread of the second pin, when the second pin is turned to move it toward the second pin hole, the thread glue will harden at the thread engagement point, hindering the second pin from extending into the second pin hole. However, if the thread glue is applied to the second pin hole manually before the door is installed, another problem will occur. That is, the thread glue inside the second pin hole with an opening facing downward will flow downward toward the first pin under the action of gravity before the second pin enters the second pin hole. If the thread glue contacts the outer wall of the first pin and solidifies, it will fix the first pin to the side wall of the groove, affecting the rotation of the first pin inside the groove, and thus affecting the opening and closing of the door. The downward-flowing thread glue will drip onto the end face of the second pin and enter between the external and internal threads, also preventing the second pin from extending into the second pin hole.

[0021] Only by sealing the thread glue in the storage cavity first and allowing most of the second pin to enter the second pin hole, and then using the pointed cone at the end of the second pin to pierce and open the storage cavity, can the thread glue flow downward along the thread of the second pin to fill the gap between the second pin and the second pin hole, and because the thread glue will not flow to the meshing point between the external thread on the second pin and the internal thread on the first pin, it will not affect the rotation of the second pin, ensuring that the second pin can still extend into the second pin hole under the action of the thread guide. In addition, because the thread glue gradually flows downward along the external thread of the second pin, the thread glue will continue to solidify and consume, thus preventing the thread glue from flowing to the mating surface between the first pin and the groove, ensuring that the first pin can rotate smoothly between the grooves.

[0022] Preferably, one end of the first pin shaft facing the horizontal center plane of the first fixed plate is provided with a ring-shaped inclined chamfer, and when the push spring is in the natural state, the lower edge of the inclined chamfer is lower than the opening edge of the groove or is flush with the opening edge of the groove, and the upper edge of the inclined chamfer is not lower than the opening edge of the groove.

[0023] The inclined chamfer allows the first pin to be pushed into the groove by the pressure of the protrusion against the inclined chamfer when the protrusion is inserted into the insertion space, eliminating the need for manual labor to pull the first pin into the groove, further improving the convenience of operation.

[0024] The lower edge of the inclined chamfer is required to be lower than or flush with the opening edge of the groove, and the upper edge of the inclined chamfer is required to be no lower than the opening edge of the groove. This ensures that when the protrusion is inserted into the insertion space, the first pin shaft is automatically lowered to press into the groove. When the first pin hole on the protrusion is aligned with the first pin shaft, the first pin shaft is ensured to be locked into the first pin hole under the action of the push spring to complete the positioning of the protrusion.

[0025] Preferably, a plurality of lubrication grooves are provided on the side wall of the first pin shaft, and the lubrication grooves are all arranged along the axis of the first pin shaft. The plurality of lubrication grooves are evenly distributed on the first pin shaft with the axis of the first pin shaft as the reference circumference, and each lubrication groove is filled with grease. Since the second pin shaft is fixedly connected to the second pin hole, and the second pin shaft is threadedly connected to the first pin shaft, when the second fixed plate and the first fixed plate rotate relative to each other, it is mainly the outer wall of the first pin shaft and the groove that slide relative to each other. The provision of the lubrication groove and grease can reduce friction when the outer wall of the first pin shaft rotates inside the groove, reduce friction loss between the outer wall of the first pin shaft and the inner wall of the groove, ensure the coaxiality of the rotation, and thereby improve the rotation stability and smoothness of the door when opening and closing.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. Compared with the existing pin shaft connection parts, the pin shaft connection part designed by the present invention is achieved by fixing the first fixing plate and the second fixing plate on the door frame and the door panel respectively, and then the protrusion on the second fixing plate is inserted into the insertion space of the first fixing plate, and then the first pin shaft inside the groove pops out and is inserted into the first pin hole of the protrusion under the action of the push spring, so that the door panel and the door frame can be quickly rotated and connected without the need for multiple people to assist in the installation, which improves the convenience of door installation and thus improves the efficiency of door installation.

[0028] 2. A pin connection designed by the present invention is further provided with a second pin on the first pin. The second pin is threadedly connected to the first pin. The second pin is used as an extension of the first pin and is inserted deeper into the protrusion, thereby further improving the connection strength between the first fixing plate and the second fixing plate and ensuring the connection stability between the door panel and the door.

[0029] 3. The pin connector designed by the present invention also includes a tapered groove in the second pin hole and a pointed cone at the top of the second pin. The tapered groove and the pointed cone cooperate to quickly align the axis of the second pin hole with the axis of the second pin, reducing the possibility of shaking when the door is rotated after installation. In addition, a storage cavity is provided within the second pin hole, and thread glue is provided in the storage cavity. The use of thread glue can further reduce the matching precision requirements between the second pin and the second pin hole, and can improve the connection stability between the second pin and the protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0031] Figure 2 This is a three-dimensional schematic diagram of the protrusion of the present invention when inserted into the insertion space;

[0032] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0034] Figure 5 It is a front view of the present invention;

[0035] Figure 6 For the present invention Figure 5 Cross-sectional view at CC;

[0036] Figure 7 For the present invention Figure 6 Enlarged view of point D in the middle;

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of the second pin shaft in the present invention.

[0038] In the figure: 1. First fixing plate; 2. Second fixing plate; 3. Mounting ear; 4. Insertion space; 5. Groove; 6. First pin shaft; 7. Push spring; 8. Protrusion; 9. First pin hole; 10. Internal thread; 11. Second pin shaft; 12. External thread; 13. Second pin hole; 14. Slot; 15. Block; 16. Spring; 17. Annular groove; 18. Conical portion; 19. Sealing film; 20. Storage cavity; 21. Thread glue; 22. Inclined chamfer; 23. Lubrication groove; 24. Grease; 25. Hexagonal socket; 26. Inner hole; 27. Conical groove; E. Horizontal center plane; X. Rotation axis. DETAILED DESCRIPTION

[0039] See also Figures 1 to 8 The present invention provides a pin connector, and the technical solution is as follows:

[0040] A pin connection, reference Figure 1 、 Figure 2 、 Figure 3 and Figure 5 , comprising a first fixing plate 1 for fixed connection to the door frame and a second fixing plate 2 for fixed connection to the door panel. Two mounting ears 3 are fixedly installed on the first fixing plate 1 at intervals. The two mounting ears 3 are symmetrically arranged about the horizontal center plane E of the first fixing plate 1, and an insertion space 4 is formed between the two mounting ears 3. The mounting ears 3 are each provided with a circular groove 5. The axes of the two grooves 5 coincide with each other, and the openings of the two grooves 5 are arranged opposite each other. A first pin 6 that matches the groove 5 is slidably installed inside each groove 5. Four lubrication grooves 23 are formed on the sidewall of the first pin 6. The lubrication grooves 23 are all arranged along the axis of the first pin 6. The four lubrication grooves 23 are evenly distributed on the first pin 6 with the axis of the first pin 6 as the reference circumference. Each lubrication groove 23 is filled with grease 24.

[0041] refer to Figure 3 The first pin 6 is coaxially provided with an inner hole 26, which is provided with an internal thread 10. A second pin 11 is also provided at the inner hole 26, and the second pin 11 is provided with an external thread 12 that can mesh with the internal thread 10. One end of the second pin 11 passes through the bottom of the groove 5 and extends outside the groove 5, and the end surface of the second pin 11 extending outside the groove 5 is provided with an inner hexagonal groove 25. A push spring 7 is provided inside the groove 5, and the push spring 7 is used to push the first pin 6 out of the groove 5. The end of the first pin 6 facing the horizontal center plane E of the first fixed plate 1 is provided with an annular inclined chamfer 22. When the push spring 7 is in the natural state, the lower edge of the inclined chamfer 22 is lower than the opening edge of the groove 5 or is flush with the opening edge of the groove 5, and the upper edge of the inclined chamfer 22 is not lower than the opening edge of the groove 5. In this embodiment, the lower edge of the inclined chamfer 22 is flush with the opening edge of the groove 5.

[0042] refer to Figure 3 and Figure 8 A plurality of springs 16 are provided on the end surface of the second pin 11 facing the horizontal center plane E of the first fixed plate 1. The plurality of springs 16 are evenly distributed around the circumference with the axis of the second pin 11 as the reference. The springs 16 form an inclined angle with the end surface of the second pin 11. The projections of the springs 16 on the end surface of the second pin 11 are all located within the diameter of the second pin 11. The plurality of springs 16 together form a trumpet shape, with the large end of the trumpet facing the horizontal center plane E of the first fixed plate 1. A conical portion 18 is also provided on the end surface of the second pin 11 facing the horizontal center plane E of the first fixed plate 1. The conical portion 18 is located at the center of the plurality of springs 16, and the tip of the conical portion 18 faces the horizontal center plane E of the first fixed plate 1.

[0043] refer to Figure 2 、 Figure 4 、 Figure 6 and Figure 7 A protrusion 8 for snapping into the insertion space 4 is fixedly mounted on the second fixing plate 2. A first pin hole 9 is provided at both the top and bottom of the protrusion 8, which mates with the first pin shaft 6. A second pin hole 13 is coaxially disposed within the pin hole, and the inner diameter of the second pin hole 13 is the same as the diameter of the second pin shaft 11. An annular groove 17 is also defined at the bottom of the second pin hole 13. The annular groove 17 is coaxial with the second pin hole 13 and flush with the bottom of the second pin hole 13. The diameter of the annular groove 17 is larger than the diameter of the second pin hole 13. A tapered groove 27 corresponding to the tapered portion 18 is also provided at the bottom of the second pin hole 13.

[0044] refer to Figure 6 and Figure 7 A sealing film 19 is provided in the middle of the second pin hole 13. The sealing film 19 isolates the conical groove 27 and the annular groove 17 from the first pin hole 9 and forms a storage cavity 20. The storage cavity 20 stores thread glue 21.

[0045] refer to Figure 3 and Figure 4 A plurality of card slots 14 are provided at one end of the first pin shaft 6 facing the horizontal center plane E of the first fixed plate 1. The plurality of card slots 14 are evenly distributed on the first pin shaft 6 with the axis of the first pin shaft 6 as the reference circumference. A plurality of card blocks 15 are provided at the bottom of the first pin hole 9. The plurality of card blocks 15 are evenly distributed in the first pin hole 9 with the axis of the first pin hole 9 as the reference circumference.

[0046] When using, refer to Figure 2 、 Figure 3 Figure 6 and Figure 7First, turn the second pin 11 to adjust its position. Ensure that the end of the second pin 11 with the spring 16 is housed within the inner hole 26 of the first pin 6, and that the spring 16 and the conical portion 18 do not extend beyond the end surface of the first pin 6 facing the horizontal center plane E of the first fixing plate 1. Next, secure the door frame to the wall. Then, by measuring, locate the installation positions of the first fixing plate 1 and the second fixing plate 2 on the door frame and door panel, respectively. Then, screw the first fixing plate 1 to the door frame at the designated installation position. Then, screw the second fixing plate 2 to the door panel at the designated installation position. Then, manually lift the door panel and insert the protrusion 8 on the second fixing plate 2 horizontally into the insertion space 4 between the two mounting ears 3 on the first fixing plate 1. When the protrusion 8 is horizontally inserted into the insertion space 4, the top of the protrusion 8 presses against the inclined chamfer 22 on the upper first pin 6, pushing the upper first pin 6 toward the upper groove 5; while the bottom of the protrusion 8 presses against the inclined chamfer 22 on the lower first pin 6, pushing the lower first pin 6 toward the lower groove 5. In this way, the protrusion 8 can be smoothly inserted into the insertion space 4.

[0047] refer to Figure 3 、 Figure 6 and Figure 7 When the axes of the two first pins 6 on the first fixing plate 1 are aligned with the two first pin holes 9 on the second fixing plate 2, the two first pins 6, under the action of the two push springs 7, will be inserted into the two first pin holes 9 on the protrusion 8, thereby securing the protrusion 8. With the two mounting ears 3 and the two first pins 6 positioned, the installer can now loosen the door panel and insert a wrench into the hexagonal socket 25 on the second pin 11 to tighten the second pin 11. Alternatively, the installer can hold the door panel with one hand and use a wrench with the other hand to tighten the second pin 11 on the first fixing plate 1. Twist both second pins 11 on the first fixing plate 1 into the second pin holes 13 until the second pins 11 can no longer extend into the second pin holes 13.

[0048] refer to Figure 3 、 Figure 6 and Figure 7When the second pin 11 is screwed and turned toward the first pin hole 9, the first pin 6 will rotate along with the second pin 11 under the action of friction, while the push spring 7 continues to push the first pin 6 toward the first pin hole 9. In this way, when the slot 14 on the first pin 6 is aligned with the block 15 inside the first pin hole 9, the push spring 7 can continue to push the first pin 6 toward the first pin hole 9 until the block 15 enters the slot 14. After the block 15 enters the slot 14, the first pin 6 can no longer rotate along with the second pin 11. At this time, if the second pin 11 is screwed again, the second pin 11 can gradually extend into the second pin hole 13 under the guidance of the thread.

[0049] refer to Figure 7 As the second pin 11 extends into the second pin hole 13, the conical portion 18 at the top of the second pin 11 punctures the sealing film 19, and the thread glue 21 inside the storage chamber 20 contacts the second pin 11. As the second pin 11 gradually extends into the second pin hole 13, the thread glue 21 is evenly coated on the second pin 11, filling the gap between the second pin 11 and the second pin hole 13. When the spring 16 at the top of the second pin 11 contacts the bottom of the second pin hole 13, as the second pin 11 continues to extend into the second pin hole 13, the spring 16 is squeezed and bent to extend into the annular groove 17. The conical portion 18 on the second pin 11 is inserted into the tapered groove 27 in the second pin hole 13. The conical portion 18 inserted into the tapered groove 27 can fine-tune the position of the protrusion 8 to ensure that the axis of the second pin 11 is aligned with the axis of the second pin hole 13. Subsequently, when the thread glue 21 is hardened, the second pin shaft 11 and the inner wall of the second pin hole 13 are fixedly connected together.

[0050] At this point, the door is installed, and the rotation axis X of the door panel coincides with the axes of the first pin 6 and the second pin 11. When the door panel is rotated, the door can rotate around the rotation axis X. When the door panel is rotated, the first pin 6 rotates inside the groove 5.

[0051] A specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiment described above. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A pin connection member, comprising a first fixing plate (1) for fixedly connecting to a door frame and a second fixing plate (2) for fixedly connecting to a door panel, characterized in that: Two mounting ears (3) are fixedly installed on the first fixing plate (1) at intervals, and the two mounting ears (3) are symmetrically arranged about the horizontal center plane (E) of the first fixing plate (1). A plug-in space (4) is formed between the two mounting ears (3). A circular groove (5) is provided on each mounting ear (3), and the axes of the two grooves (5) coincide with each other. The openings of the two grooves (5) are arranged relative to each other. A first pin shaft (6) matching the groove (5) is slidably installed inside the groove (5), and a push spring (7) is provided inside the groove (5). The push spring (7) is used to push the first pin shaft (6) toward the outside of the groove (5); a protrusion (8) for being inserted into the plug-in space (4) is fixedly installed on the second fixing plate (2), and a first pin hole (9) matching the first pin shaft (6) is provided at the top and bottom of the protrusion (8).

2. A pin connection according to claim 1, characterized in that: An inner hole (26) is coaxially provided on the first pin shaft (6), an inner thread (10) is provided on the inner hole (26), a second pin shaft (11) is also provided at the inner hole (26), an outer thread (12) capable of engaging with the inner thread (10) is provided on the second pin shaft (11), one end of the second pin shaft (11) passes through the bottom of the groove (5) and extends outside the groove (5); a second pin hole (13) is coaxially provided in the pin hole, and the inner diameter of the second pin hole (13) is the same as the diameter of the second pin shaft (11).

3. A pin connection according to claim 2, characterized in that: A plurality of slots (14) are provided at one end of the first pin shaft (6) facing the horizontal center plane (E) of the first fixed plate (1), and the plurality of slots (14) are evenly distributed on the first pin shaft (6) with the axis of the first pin shaft (6) as the reference circumference. A plurality of blocks (15) are provided at the bottom of the first pin hole (9), and the plurality of blocks (15) are evenly distributed in the first pin hole (9) with the axis of the first pin hole (9) as the reference circumference.

4. A pin connection according to claim 2, characterized in that: A plurality of springs (16) are provided on an end face of the second pin shaft (11) facing the horizontal center plane (E) of the first fixed plate (1), and the plurality of springs (16) are evenly distributed around the circumference with the axis of the second pin shaft (11) as a reference. An inclined angle is formed between the springs (16) and the end face of the second pin shaft (11), and the projections of the springs (16) on the end face of the second pin shaft (11) are all located within the diameter of the second pin shaft (11). The plurality of springs (16) are collectively formed into a trumpet shape, and the large end of the trumpet shape is directed toward the horizontal center plane (E) of the first fixed plate (1). An annular groove (17) is provided at the bottom of the second pin hole (13), and the annular groove (17) is coaxial with the second pin hole (13) and flush with the bottom of the second pin hole (13). The diameter of the annular groove (17) is larger than the diameter of the second pin hole (13).

5. A pin connection according to claim 4, characterized in that: A conical portion (18) is further provided on an end surface of the second pin shaft (11) facing the horizontal center plane (E) of the first fixed plate (1), the conical portion (18) is located at the center of the plurality of spring leaves (16), the tip of the conical portion (18) is directed toward the horizontal center plane (E) of the first fixed plate (1), and a conical groove (27) corresponding to the conical portion (18) is further provided at the bottom of the second pin hole (13).

6. A pin connection according to claim 5, characterized in that: A sealing film (19) is provided in the middle of the second pin hole (13), and the sealing film (19) isolates the conical groove (27), the annular groove (17) and the first pin hole (9) to form a storage cavity (20), and the storage cavity (20) stores thread glue (21) therein.

7. The pin connector according to claim 1, characterized in that: An annular chamfer (22) is provided at one end of the first pin shaft (6) facing the horizontal center plane (E) of the first fixed plate (1); when the push spring (7) is in a natural state, the lower edge of the chamfer (22) is lower than the opening edge of the groove (5) or is flush with the opening edge of the groove (5), and the upper edge of the chamfer (22) is not lower than the opening edge of the groove (5).

8. The pin connector according to claim 1, characterized in that: A plurality of lubrication grooves (23) are provided on the side wall of the first pin shaft (6), and the lubrication grooves (23) are all arranged along the axis direction of the first pin shaft (6). The plurality of lubrication grooves (23) are evenly distributed on the first pin shaft (6) with the axis of the first pin shaft (6) as a reference circumference, and each of the lubrication grooves (23) is filled with lubricating grease (24).

Images