Telescopic door shaft rod connecting structure convenient to install

Abstract

The utility model discloses a telescopic door shaft rod connecting structure convenient to install. The telescopic door shaft rod connecting structure comprises a limiting piece detachably arranged at the hinged position of a middle shaft and a connecting rod in a penetrating mode. A limiting part for limiting and fixing the limiting piece is arranged at the hinged part of the middle shaft and the connecting rod; at least one part of the limiting piece can enter the limiting part and is limited and clamped, so that the limiting assembly is detachably and fixedly installed on the middle shaft and located on the two sides of the hinged position of the middle shaft and the connecting rod, and therefore the relative movement of the connecting rod and the middle shaft is limited; according to the utility model, the connection between the connecting rod and the middle shaft is effectively fixed by using the integrally pre-integrated limiting assembly, and the assembly process is simplified; compared with a traditional connecting structure, through the innovative application of the integrally-designed limiting piece, the assembling efficiency is greatly improved, the complexity is reduced, and the connecting structure is suitable for large-scale production and use.

Description

TECHNICAL FIELD

[0001] The utility model relates to retractable door technical technology technical field especially, it relates to a retractable door axle rod connecting structure convenient to installation. BACKGROUND

[0002] Retractable door is a kind of door class product for improving the security and convenience of building entrance or other area, and the key components of retractable door include driving device, door frame, connecting rod and running wheel etc., wherein, the door frame is made of column and the rotating shaft between connecting column, and the connecting rod is the important component of connecting adjacent door frame.To ensure the stability and durability of connecting rod, specific connecting structure is usually needed to fix connecting rod and reduce the friction and wear of metal contact surface.The existing retractable door connecting structure is mainly fixed connecting rod by setting sleeve on rotating shaft or welding retaining ring or positioning sleeve on the rotating shaft of both sides of connecting rod, such as the connecting rod structure disclosed in the Chinese utility model patent with the publication number CN2012567848Y and the patent name retractable door's middle shaft connecting structure, which uses limit tube, sleeve, decorative hardware cover, fixing glue and glue nail etc.to fix middle shaft, although the fixation of connecting rod can be realized, but the following problems still exist:

[0003] 1. The cost of setting sleeve on rotating shaft is relatively high, and it is time-consuming and laborious, and at the same time, the form of sleeve is limited in the use space and application range, which can only be used between the middle connecting rods, and it is difficult to be applied to the side section of door row;2. The way of welding retaining ring or positioning sleeve on the rotating shaft of both sides of connecting rod will lead to the non-detachable of rotating shaft and connecting rod, which is inconvenient for installation and maintenance, increases the disassembly and maintenance cost, and once the welding fails, the component is scrapped;At the same time, due to the way of separating connecting rods by using large pipe and small pipe, the selection of large middle shaft is limited in space, and the firmness of the whole door body is damaged by selecting larger middle shaft;3. In the existing sleeve connecting mode, the friction noise of metal contact surface is large and easy to wear, which affects the service life of retractable door, and the connecting structure needs to be frequently replaced, which increases the use cost.

[0004] Therefore, further research and development are needed to solve the problems existing in the above-mentioned prior art. SUMMARY

[0005] To solve the technical problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a retractable door axle rod connecting structure convenient to installation, compared with the traditional connecting structure, the scheme is innovatively applied by integrated design, which greatly improves the assembly efficiency, and the assembly efficiency is improved by more than 60%, and the complexity is reduced, which is suitable for large-scale production and use.

[0006] The purpose of the utility model is realized by the following technical scheme:

[0007] A telescopic door shaft rod connecting structure convenient to install, the shaft rod comprising a middle shaft installed on a telescopic door frame and a connecting rod hingedly connected with the middle shaft; the shaft rod connecting structure comprising a limiting assembly detachably fixedly installed at the hinged connecting position of the middle shaft and the connecting rod;

[0008] The limiting assembly comprising a limiting piece detachably clamped on the middle shaft; the middle shaft being provided with a limiting portion at the hinged connecting position of the connecting rod for limiting fixation of the limiting piece; at least a part of the limiting piece being capable of entering the limiting portion and being clamped there, so that the limiting assembly is detachably fixedly installed on the middle shaft and located on both sides of the hinged connecting position of the connecting rod, thereby limiting relative movement of the connecting rod and the middle shaft.

[0009] In particular, the limiting piece comprises a limiting clamping leg, and opposite sides of the middle shaft are provided with limiting clamping grooves or limiting holes corresponding to the limiting clamping leg; the two limiting clamping legs enter the limiting clamping grooves or limiting holes and are clamped there, so that the limiting assembly is detachably fixedly installed on the middle shaft.

[0010] Further, the limiting assembly comprises a limiting ring slidably sleeved on the middle shaft, the limiting ring being provided with insertion grooves penetrating the limiting ring, and the two insertion grooves are oppositely arranged on the limiting ring; the insertion grooves correspondingly communicate with the limiting clamping grooves or limiting holes of the middle shaft, and the limiting clamping legs can pass through the insertion grooves and be clamped in the limiting clamping grooves or limiting holes.

[0011] Further, the limiting piece is a U-shaped or C-shaped baffle, and the opening end of the baffle is provided with the limiting clamping leg; the insertion grooves extend along the inner wall of the limiting ring in the circumferential direction; the outer side of the limiting ring is radially concave and provided with a positioning recess communicating with the insertion grooves; by laterally pushing the baffle, the two limiting clamping legs enter the limiting ring through the positioning recess, and the part of the limiting clamping legs towards the middle shaft enters the limiting clamping groove and is clamped there.

[0012] Further, the inner wall of one end of the baffle away from the opening end is provided with a deformation notch, and the part of the limiting clamping leg towards the middle shaft located in the limiting clamping groove is provided with a limiting clamping block; the two limiting clamping legs make the limiting clamping blocks interference abut on the limiting clamping groove under the deformation action of the baffle.

[0013] Further, the distal end of the limiting clamping leg is outwardly convex on at least one side of the side wall and provided with a positioning protrusion preventing the limiting clamping leg from loosening; the side wall of the positioning recess is provided with at least one positioning hole corresponding to the positioning protrusion along the moving direction of the limiting clamping leg, and the positioning protrusion is located in the positioning hole and fixed.

[0014] Further, the limiting ring is provided with two positioning holes along the moving direction of the limiting clamping leg, and the two positioning holes are respectively located on the two sides of the inner hole of the limiting ring.

[0015] Further, the limiting ring is an annular limiting ring, and the limiting ring is provided with an avoiding notch parallel to the middle line of the insertion slot on the two sides away from the two side walls of the insertion slot; the middle shaft is further sleeved with a decorative buckle cover, the decorative buckle cover is provided with a clamping boss on the side edge facing the limiting ring, and the limiting ring is provided with a clamping step matched with the clamping boss; and the limiting ring is clamped in the decorative buckle cover through the cooperation of the clamping boss and the clamping step.

[0016] Alternatively, the limiting member can also adopt the following design:

[0017] The limiting member is a C-shaped clamping spring, and the two limiting clamping legs are located on the open end of the clamping spring and extend towards each other; the limiting clamping leg can pass through the insertion slot and be clamped in the limiting hole of the middle shaft; the outer periphery of the limiting ring is provided with a supporting portion for mounting the clamping spring, and the clamping spring is clamped on the supporting portion by moving away or close to the two limiting clamping legs to open or close;

[0018] The supporting portion includes a first supporting portion and a second supporting portion which are arranged in opposite connection around the limiting ring; a positioning groove for arranging the first supporting portion and the second supporting portion and communicating with the insertion slot is radially concave on the outer side of the limiting ring; the insertion slot is arranged at the connection of the first supporting portion and the second supporting portion and corresponds to the limiting hole of the middle shaft; the diameter of the first supporting portion is greater than that of the second supporting portion; the clamping spring can be transferred between the first supporting portion and the second supporting portion, and under the action of its own deformation, the end of the limiting clamping leg enters the corresponding limiting hole in the middle shaft through the insertion slot and is clamped tightly.

[0019] Further, the C-shaped clamping spring is any one of a clamping spring, a clamping ring, a clamping ring, a stop ring, a buckle ring or a spring buckle.

[0020] Further, the supporting portion is generally in the shape of a step, a nest or a bowl.

[0021] Further, one end of the second supporting portion close to the insertion slot is provided with a limiting guide portion for guiding the limiting clamping leg to enter the insertion slot; by pushing or pulling the clamping spring, the limiting clamping leg can move from the second supporting portion to the insertion slot through the limiting guide portion, so that the end of the limiting clamping leg is inserted and clamped in the corresponding limiting hole in the middle shaft through the insertion slot.

[0022] Further, the length of the limiting clamping leg is not greater than the difference between the diameter of the first supporting part and the hole diameter of the limiting ring inner hole, so that when the clamping spring is clamped on the first supporting part, the end of the limiting clamping leg does not extend into the limiting hole of the middle shaft; the clamping spring rotates around the insertion slot through the limiting clamping leg and is transferred to be clamped on the second supporting part, so that the end of the limiting clamping leg is inserted into the corresponding limiting hole of the middle shaft through the insertion slot and clamped.

[0023] Further, the middle shaft is further provided with a wear-resistant sleeve at the hinge of the connecting rod.

[0024] Compared with the prior art, the utility model has at least the following beneficial effects:

[0025] 1. The utility model discloses a connecting structure of middle shaft and connecting rod of retractable door, which integrally assembles the limiting part and the limiting ring, forms stable connection at the hinge of the middle shaft and the connecting rod after overall installation, limits the axial movement of the connecting rod, enhances the safety of connection, and ensures the stability of the retractable door in use.

[0026] The utility model integrally designs the limiting part and the limiting ring as symmetrical design, is not divided into left and right, and is universal on two sides, omits the operation such as selecting direction and aligning in the assembly process, avoids assembly error, and simplifies the assembly step, and greatly improves assembly efficiency, simultaneously, the characteristics that the limiting part and the limiting ring are integrally designed are that the limiting part is first fixed through the positioning groove of the limiting ring before assembly, ensures that it does not fall off, and only needs to push and pull the limiting part when assembling, so that the limiting clamping leg enters the limiting clamping slot or limiting hole of the middle shaft and is clamped tightly, and assembly is completed.

[0027] Therefore, the installation operation of the middle shaft connecting rod connecting structure of the utility model is simple and convenient, only needs to install the limiting ring of the limiting component to the middle shaft, and then moves the limiting part, so that the limiting clamping leg completes alignment and clamps the middle shaft, reduces metal friction, jam and other problems in the installation process, avoids installation error or the need for multiple adjustments due to improper alignment in the prior art, saves time and effort, compared with the traditional structure, the limiting assembly of the utility model improves assembly efficiency by at least 60% without increasing additional cost, simultaneously, does not need complex tools or multiple fixing processes, and greatly reduces assembly difficulty.

[0028] 2.The limit ring structure of the utility model has the advantages of compact structure, convenient manufacturing and assembly, improved production efficiency, reduced material waste, reduced overall production cost, no need to disassemble multiple components during maintenance and replacement, simple operation, greatly reduced maintenance cost and time, multiple flexible implementation manners, U-shaped stop sheet in one preferred implementation manner, positioning protrusion on the stop sheet, corresponding positioning hole on the limit ring, positioning of the stop sheet through the cooperation of the positioning protrusion and the positioning hole before assembly, prevention of loosening of the stop sheet, no influence on pushing of the stop sheet during assembly, convenient operation, positioning recess, stability of connection of the stop sheet to the shaft after assembly, and good hiding of the stop sheet.

[0029] 3.The limit assembly structure of the utility model has the advantages of compact structure, fixation, assembly and limit connection of the limit component to the shaft and the connecting rod through the annular positioning recess of the limit ring, compact overall structure, optimized space utilization, simple and reasonable design, prevention of loosening in the clamping state, enhanced stability and safety of the connection, straight edge avoidance notch design of the limit ring, improved clamping effect of the decorative cover, optimized accommodation space of the limit component, and enhanced aesthetic appearance of the overall appearance.

[0030] 4.The shaft connecting rod connecting structure of the utility model has the advantages of enhanced connection stability, improved assembly efficiency, efficient and convenient installation, compact structure, efficient manufacturing, improved assembly precision and convenience, improved connection performance of the shaft and the connecting rod of the telescopic door, high efficiency, flexibility, stability and aesthetics, and good market application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The limit assembly and decorative cover structure of the telescopic door shaft rod connecting structure for convenient installation of the utility model embodiment 1 are shown in the schematic view.

[0032] Figure 2 The limit assembly and the shaft of the telescopic door shaft rod connecting structure for convenient installation of the utility model embodiment 1 are shown in the assembly schematic view before assembly.

[0033] Figure 3 The limit assembly and the shaft of the telescopic door shaft rod connecting structure for convenient installation of the utility model embodiment 1 are shown in the assembly direction and the state after assembly.

[0034] Figure 4Limiting assembly assembly before assembling schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 2 of the utility model;

[0035] Figure 5 Limiting assembly assembly after assembling schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 2 of the utility model;

[0036] Figure 6 Structure exploded schematic view of the limiting assembly of the telescopic door shaft rod connecting structure convenient to install of embodiment 2 of the utility model;

[0037] Figure 7 Limiting assembly and middle shaft assembly direction and assembled state schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 2 of the utility model;

[0038] Figure 8 Middle shaft connecting rod assembly state schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 1-2 of the utility model;

[0039] Figure 9 Limiting assembly and decorative cover structure schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 3 of the utility model;

[0040] Figure 10 Limiting assembly assembly schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 3 of the utility model;

[0041] Figure 11 Limiting assembly structure schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 4 of the utility model;

[0042] Figure 12 Limiting assembly assembly schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 4 of the utility model;

[0043] Figure 13 Limiting assembly structure schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 5 of the utility model;

[0044] Figure 14 Limiting assembly assembly schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 5 of the utility model;

[0045] Figure 15 Assembly state schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 3-5 of the utility model;

[0046] Figure 16 Assembly state schematic view of the telescopic door shaft rod connecting structure convenient to install of embodiment 1-5 of the utility model.

[0047] In the drawing,

[0048] 1. Limiting component; 11. Limiting piece; 111. Limiting foot; 112. Deformation notch; 113. Limiting block; 114. Positioning protrusion; 12. Limiting ring; 121. Slot; 122. Positioning groove; 123. Positioning hole; 124. Support part; 1241. First support part; 1242. Second support part; 1243. Limiting guide part; 125. Clearance notch; 126. Engaging step; 2. Decorative cover; 21. Engaging boss;

[0049] 10. Central shaft; 101. Limiting part; 20. Connecting rod; 30. Door frame; 40. Sliding cover; R1. Diameter of the first support part; R2. Diameter of the second support part; R3. Diameter of the inner hole of the limiting ring. Detailed Implementation

[0050] To facilitate understanding of this utility model, the technical solution and advantages of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Any mechanisms or methods not described in this utility model can be referenced from the prior art. The specific structure and features of this utility model are illustrated below by way of example, and should not be construed as limiting this utility model in any way.

[0051] The accompanying drawings illustrate a preferred embodiment of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention.

[0052] Example 1

[0053] like Figures 1-3 As shown in 8 and 16, this embodiment 1 provides a telescopic gate shaft connection structure that is easy to install. The shaft includes a central shaft 10 installed on the telescopic gate frame and a connecting rod 20 hinged to the central shaft 10. The shaft connection structure includes a limiting component 1 that is detachably installed at the hinge point between the central shaft 10 and the connecting rod 20.

[0054] Specifically, the limiting component 1 includes a limiting member 11 that is detachably snapped onto the central shaft; the central shaft 10 is provided with a limiting part 101 for limiting and fixing the limiting member 11 at the hinge point with the connecting rod 20; at least a portion of the limiting member 11 can enter the limiting part 101 and be limited and snapped, so that the limiting component 1 is detachably fixedly installed on the central shaft 10 and located on both sides of the hinge point with the connecting rod 20, thereby restricting the relative movement of the connecting rod 20 and the central shaft 10.

[0055] In the embodiment, the limiting member is arranged to be clamped into and firmly fixed on the intermediate shaft from the limiting part prearranged on the opposite side of the outer wall of the intermediate shaft, and the relative movement of the connecting rod and the intermediate shaft is prevented by the limiting effect of the limiting member. The fact that at least part of the limiting member can enter the limiting part and be clamped there means that at least part of the structure of the limiting member can be fixedly matched with the limiting part to achieve locking and fixing of the intermediate shaft.

[0056] Specifically, the limiting member 11 comprises a limiting clamping leg 111, and the opposite side of the intermediate shaft 10 is provided with the limiting part 101 in the form of a limiting clamping groove matched with the limiting clamping leg 111; the two limiting clamping legs 111 enter the limiting clamping grooves and are clamped there, so that the limiting assembly 1 is detachably fixed and installed on the intermediate shaft 10.

[0057] Alternatively, the limiting assembly 1 further comprises a limiting ring 12 which is slidably sleeved on the intermediate shaft 10, the limiting ring 12 is provided with an insertion groove 121 penetrating the limiting ring 12, and the two insertion grooves 121 are arranged on the limiting ring 12 in radial opposition along the intermediate shaft 10; the insertion groove 121 is in corresponding communication with the limiting clamping groove of the intermediate shaft 10, and the limiting clamping leg 111 can pass through the insertion groove 121 and be clamped in the limiting clamping groove or limiting hole.

[0058] Preferably, the limiting member 11 is a U-shaped or C-shaped baffle, the opening end of the baffle is respectively provided with the limiting clamping leg 111, the insertion groove 121 is arranged in extension along the inner wall of the limiting ring 12 in the circumferential direction, the radially inner side of the outer side of the limiting ring 12 is concavely provided with a positioning groove 122 in communication with the insertion groove 121, and by laterally pushing the baffle, the two limiting clamping legs 111 enter the limiting ring 12 through the positioning groove 122, and the part of the limiting clamping leg 111 towards the intermediate shaft 10 enters the limiting clamping groove and is clamped there.

[0059] In the embodiment, the limiting ring 12 is a ring-shaped limiting ring, and the two sides of the limiting ring 12 away from the two side walls of the insertion slot 121 are respectively provided with an avoiding gap 125 parallel to the middle line of the insertion slot 121; the middle shaft 10 is further sleeved with a decorative buckle cover 2, and the decorative buckle cover 2 is provided with a clamping boss 21 at the side edge facing the limiting ring 12; the limiting ring 12 is provided with a clamping step 126 matched with the clamping boss 21; and the limiting ring 12 is clamped in the decorative buckle cover 2 through the cooperation of the clamping boss 21 and the clamping step 126. In the embodiment, the baffle is a metal baffle, the limiting ring and the decorative buckle cover can be made of hard plastic, the clamping boss is radially protruded at the edge of the decorative cover close to the limiting ring, and the clamping step is designed as a concave edge of the limiting ring. When the edge of the decorative buckle cover is clamped on the clamping step through extrusion deformation and integrated with the limiting ring and the baffle, the baffle is limited in the decorative buckle cover and cannot slide out when the connecting rod is deformed under stress during the operation of the door body, so that the connecting rod is firmly limited, and the decorative cover can also well hide the limiting ring, thereby improving the appearance of the connecting structure.

[0060] In the embodiment, the vertical section of the insertion slot is a sector, and radially penetrates the inner wall of the limiting ring; the positioning groove is a ring-shaped groove designed as a concave surface along the outer surface of the limiting ring, and the two sides of the positioning groove are provided with openings matched with the overall width of the two limiting clamping feet of the baffle; the limiting clamping feet of the baffle enter through the openings; when the baffle is in the assembled state, the opposite parts of the two limiting clamping feet are partially located in the insertion slot; when the limiting ring is entirely sleeved on the middle shaft, the part of the limiting clamping feet located in the insertion slot enters the limiting clamping groove and is clamped, thereby achieving the fixation of the middle shaft.

[0061] Preferably, the outer side wall of at least one side of the end of the limiting clamping foot 111 is protruded outward and provided with a positioning protrusion 114 for preventing the limiting clamping foot 111 from loosening; and the side wall of the positioning groove 122 is provided with at least one positioning hole 123 matched with the positioning protrusion 114 in the moving direction of the limiting clamping foot 111, and the positioning protrusion is located in the positioning hole and fixed. The advantage of this design is that the baffle can be pre-positioned before assembly, and the limiting effect on the baffle can be strengthened after assembly.

[0062] Further refinement, the limiting ring 12 is provided with two positioning holes 123 in the moving direction of the limiting clamping foot 111, and the two positioning holes 123 are respectively located at the two sides of the inner hole of the limiting ring 12.

[0063] In the embodiment, the limit ring structure is designed ingeniously. Firstly, by optimizing the cooperation of the limiting part, the limit ring and the positioning groove, the number and complexity of components are reduced, the overall structure is more compact, manufacturing and assembly are facilitated, production efficiency is significantly improved, material waste is reduced, and overall production cost is reduced. When maintaining and replacing, multiple components do not need to be disassembled, and the maintenance cost and time are greatly reduced. At the same time, the utility model has a plurality of flexible implementation modes. In one preferred implementation mode, the limiting part is designed as a U-shaped stop sheet, and by setting a positioning protrusion on the stop sheet and a corresponding positioning hole on the limit ring, the utility model can prevent the stop sheet from loosening by cooperation of the positioning protrusion and the positioning hole before assembly, and does not affect the pushing of the stop sheet during assembly, facilitating operation. Due to the design of the positioning groove, after assembly, the positioning groove of the limit ring can not only ensure the connection stability of the stop sheet to the shaft, but also can hide the stop sheet well, achieving multiple purposes at once.

[0064] In the embodiment, the limit ring structure is designed ingeniously. Firstly, by optimizing the cooperation of the limiting part, the limit ring and the positioning groove, the number and complexity of components are reduced, the overall structure is more compact, manufacturing and assembly are facilitated, production efficiency is significantly improved, material waste is reduced, and overall production cost is reduced. When maintaining and replacing, multiple components do not need to be disassembled, and the maintenance cost and time are greatly reduced. At the same time, the utility model has a plurality of flexible implementation modes. In one preferred implementation mode, the limiting part is designed as a U-shaped stop sheet, and by setting a positioning protrusion on the stop sheet and a corresponding positioning hole on the limit ring, the utility model can prevent the stop sheet from loosening by cooperation of the positioning protrusion and the positioning hole before assembly, and does not affect the pushing of the stop sheet during assembly, facilitating operation. Due to the design of the positioning groove, after assembly, the positioning groove of the limit ring can not only ensure the connection stability of the stop sheet to the shaft, but also can hide the stop sheet well, achieving multiple purposes at once.

[0065] The installation of the telescopic door shaft rod connecting structure of the embodiment 1 can refer to the following process:

[0066] Firstly, the connecting rod and the shaft are hingedly connected together, and the connecting rod is located between the two limit grooves on the shaft;

[0067] Then, the limit ring with the limiting part is sleeved on the shaft from the end of the shaft and moved to the position where the insertion slot of the limit ring is aligned with the limit groove of step 1;

[0068] Finally, the limiting part is pushed to make the end of the limit clamping foot inserted into the corresponding limit groove on the shaft through the insertion slot and clamped tightly.

[0069] The above installation method is for the installation and connection of a specific shaft and connecting rod. The telescopic door row is usually assembled by a plurality of cross-hinged shafts and connecting rods. The present application does not specifically limit the sequence of the overall assembly of the door row and the number of selected shafts or connecting rods, but can be assembled according to the requirements.

[0070] Embodiment 2

[0071] AsFigures 4-8 As shown in Figure 16, the difference between this embodiment 2 and embodiment 1 is that the baffle is provided with a structure to improve the deformation tension. Specifically, the inner wall of the end of the baffle away from the opening end is provided with a deformation notch 112, and the portion of the limiting foot 111 facing the central axis is provided with a limiting block 113; under the deformation of the baffle, the two limiting feet 111 cause the limiting block 113 to press against the limiting groove.

[0072] In this embodiment, the deformation notch 112 is located on the inner wall of the U-shaped baffle away from the opening. The deformation notch 112 can have a triangular or semi-circular cross-section, and a semi-circular notch is preferred in this embodiment. At the same time, a limiting block is provided on the portion of the limiting foot facing the central axis in the limiting groove. With this design, the distance between the limiting blocks is reduced, and when the limiting feet of the baffle enter the limiting groove from opposite sides of the central axis, an interference fit effect is generated with the limiting groove. The deformation notch can increase the deformation interference clamping force and further improve the connection stability.

[0073] Example 3

[0074] like Figures 9-10 As shown in Figures 15-16, the difference between this embodiment 3 and embodiment 1 is that the limiting member 11 is a C-shaped retaining ring, and the two limiting feet 111 of the limiting part 101 of the central shaft 10 are located at the open end of the retaining ring and extend towards each other; the limiting feet 111 can pass through the slot 121 and be engaged in the limiting hole of the central shaft 10; the outer periphery of the limiting ring 12 is provided with a support part 124 for installing the retaining ring, and the retaining ring is clamped on the support part 124 by the two limiting feet 111 moving away from or closer to each other to open or close.

[0075] In this embodiment, the limiting holes can be axially distributed on both sides of the connecting rod along the outer wall of the central shaft. Meanwhile, the limiting pins can be spring-type pins, which are respectively inserted into the corresponding limiting holes to restrict the relative movement between the connecting rod and the central shaft.

[0076] In this embodiment, the limiting ring 12 is provided with a slot 121 that extends radially through the limiting ring 12, and the limiting latch 111 can pass through the slot 121 and be engaged in the limiting hole of the central shaft 10. In this embodiment, under the insertion and clamping action of the limiting latch of the retaining spring and the limiting hole, the limiting ring is fixed on both sides of the connecting rod and restricts the relative movement of the connecting rod and the central shaft.

[0077] The utility model discloses a structure design and the deformation effect of the snap spring, and the limiting card foot can be inserted into the limiting hole of the middle shaft through the insertion slot and clamped tightly through the axial rotation or the circumferential forward push or backward pull of the first supporting part or the second supporting part, which greatly improves the assembly efficiency of the limiting assembly.

[0078] Further refinement, the C type snap spring is any one of snap spring, snap ring, snap ring, baffle ring, buckle or spring buckle. In other alternative embodiments, the snap spring can also be other limiting parts capable of realizing the function of the utility model.

[0079] Preferably, the supporting part 124 includes a first supporting part 1241 and a second supporting part 1242 arranged relatively in connection around the inner hole of the limiting ring 12; the insertion slot 121 is arranged at the connection of the first supporting part 1241 and the second supporting part 1242 and corresponds to the limiting hole of the middle shaft 10; the diameter R1 of the first supporting part 1241 is greater than the diameter R2 of the second supporting part 1242; the diameter of the first supporting part and the second supporting part refers to the diameter of the circle where the supporting point of the outer wall of the first supporting part and the second supporting part abuts against the limiting card foot, that is, the height of the first supporting part and the second supporting part is different. The main body of the snap spring is sleeved outside the first supporting part 1241, and the snap spring can be transferred from the first supporting part 1241 to the second supporting part 1242, and under the deformation effect of the snap spring, the end of the limiting card foot 111 is inserted and clamped in the corresponding limiting hole of the middle shaft 10 through the insertion slot 121.

[0080] In this embodiment, the snap spring is directly attached to the limiting ring, and after being sleeved on the middle shaft by sliding with the limiting ring, the snap spring is selected or pulled by simple operation, which ensures the accuracy of assembly, reduces the metal friction of the middle shaft and other components and the installation difficulty caused by improper alignment, and realizes quick and convenient installation.

[0081] Preferably, one end of the second supporting part 1242 close to the insertion slot 121 is provided with a limiting guide part 1243 for guiding the limiting card foot 111 into the insertion slot 121; the end of the limiting card foot 111 is inserted and clamped in the corresponding limiting hole of the middle shaft 10 through the insertion slot 121 by pulling the snap spring. The limiting guide part 1243 is generally in the shape of a step, a nest or a bowl.

[0082] In this embodiment, the cooperation of the limiting part and the supporting part is optimized first, which reduces the number and complexity of the assembly, and at the same time, the self-adaptive elastic structure design of the snap spring can be flexibly adjusted under different conditions, adapt to various connection conditions, and enhance the flexibility and adaptability in the use process.

[0083] On the other hand, the structure cooperation of the first supporting part, the second supporting part and the snap spring, and the ingenious design of the introduction of the limiting guide part greatly simplify the process of the limiting clamping leg into the slot and the limiting hole, significantly improve the assembly precision and the simplicity of the operation process, and the snap spring is more firm when clamped; in addition, by optimizing the structural parameters of the first supporting part and the second supporting part, matching the structural design of the snap spring and the length control of the limiting clamping leg, it is ensured that the snap spring is not extended into the limiting hole when clamped on the first supporting part, and effective limiting can be realized without additional structure, which is simple and ingenious.

[0084] Preferably, the outer side of the limiting ring 12 is radially concave and provided with a positioning groove 122 matched with the snap spring; and the first supporting part 1241 and the second supporting part 1242 are arranged on the positioning groove 122 in a relative ring shape. In this embodiment, the limiting assembly structure of the utility model is compact, the assembly of the first supporting part, the second supporting part and the snap spring can be realized through the ring-shaped positioning groove of the limiting ring, and the limiting connection of the limiting assembly with the intermediate shaft and the connecting rod is completed, the overall structure is more compact, and the space utilization is optimized; reasonable diameter design and cooperation of the snap spring ensure that loosening can be effectively prevented in the clamped state, and the stability and safety of the connection are enhanced.

[0085] Preferably, the limiting ring 12 is a ring-shaped limiting ring 12, and the two side outer walls of the limiting ring 12 away from the slot 121 are respectively provided with an avoiding notch 123 parallel to the center line of the slot 121.

[0086] In this embodiment, the connecting rod and the intermediate shaft are connected through a door frame 30, and the end of the intermediate shaft is slidingly connected with the door frame 30 through a sliding cover 40; the movement is stable and the noise is small,

[0087] The installation method of the limiting assembly of this embodiment 3 is as follows:

[0088] First, the connecting rod and the intermediate shaft are hingedly connected together, and the connecting rod is located between the two limiting holes on the intermediate shaft; then the limiting ring with the snap spring is sleeved on the intermediate shaft from the end of the intermediate shaft and moved to the position where the slot of the limiting ring is aligned with the limiting hole of step 1; then the snap spring is pulled to make the end of the limiting clamping leg inserted and clamped in the corresponding limiting hole of the intermediate shaft through the slot under the action of the deformation of the snap spring.

[0089] Embodiment 4

[0090] As Figures 11-12, 15-16, the difference between the embodiment 4 and the embodiment 3 is that the clamping spring is clamped on the outer side of the second supporting part 1242, and the second supporting part 1242 is provided with a limiting guide part 1243 close to one end of the insertion slot 121, which is used to guide the limiting lugs 111 to enter the insertion slot 121; by pushing the clamping spring, the limiting lugs 111 can move from the second supporting part 1242 to the insertion slot direction through the limiting guide part 1243, so that the end of the limiting lugs 111 is inserted into the corresponding limiting hole of the middle shaft 10 through the insertion slot 121 and clamped.

[0091] The difference between the assembling method of the embodiment 3 and the embodiment 4 is that the clamping spring is pushed to make the end of the limiting lugs inserted into the corresponding limiting hole of the middle shaft through the insertion slot and clamped under the deformation of the clamping spring itself.

[0092] Embodiment 5

[0093] As shown in Figures 13-15 the difference between the embodiment 5 and the embodiment 3 is that the length of the limiting lugs 111 is not greater than the difference between the diameter R1 of the first supporting part 1241 and the hole diameter R3 of the limiting ring 12, so that when the clamping spring is clamped on the first supporting part 1241, the end of the limiting lugs 111 does not extend into the limiting hole of the middle shaft 10; the clamping spring rotates around the insertion slot 121 through the limiting lugs 111 and is transferred to be clamped on the second supporting part 1242, so that the end of the limiting lugs 111 is inserted into the corresponding limiting hole of the middle shaft 10 through the insertion slot 121 and clamped.

[0094] The difference between the mounting method of the embodiment 3 and the embodiment 5 is that the clamping spring is rotated to make the end of the limiting lugs inserted into the corresponding limiting hole of the middle shaft through the insertion slot and clamped under the deformation of the clamping spring itself.

[0095] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. For those skilled in the art, it can be understood that the embodiments can be changed, modified, replaced and changed in various ways without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A retractable door shaft rod connecting structure for easy installation, the shaft rod comprising a middle shaft installed to a frame of a retractable door and a connecting rod hingedly connected to the middle shaft, characterized in that, The shaft connecting structure comprises a limiting assembly detachably fixed at the hinge joint of the middle shaft and the connecting rod; The limiting assembly comprises a limiting piece detachably clamped on the middle shaft; the middle shaft is provided with a limiting portion for limiting and fixing the limiting piece at the hinge joint of the connecting rod; at least a part of the limiting piece can enter the limiting portion and be clamped, so that the limiting assembly is detachably fixed on the middle shaft and located on both sides of the hinge joint of the middle shaft and the connecting rod, thereby limiting the relative movement of the connecting rod and the middle shaft.

2. The easy-to-install telescopic door shaft connection structure according to claim 1, characterized in that, The limiting piece comprises limiting clamping feet respectively fixed to the middle shaft from opposite sides of the middle shaft, and the opposite sides of the middle shaft are respectively provided with the limiting portion, which is a limiting clamping slot or a limiting hole matched with the limiting clamping feet; two limiting clamping feet respectively enter the limiting clamping slot or the limiting hole and are clamped, so that the limiting assembly is detachably fixed on the middle shaft.

3. The easy-to-install telescopic door shaft connection structure according to claim 2, characterized in that, The limiting assembly comprises a limiting ring slidably sleeved on the middle shaft, the limiting ring is provided with an insertion slot penetrating through the limiting ring, and two insertion slots are oppositely arranged on the limiting ring; the insertion slot is correspondingly communicated with the limiting clamping slot or the limiting hole of the middle shaft, and the limiting clamping feet can pass through the insertion slot and be clamped in the limiting clamping slot or the limiting hole.

4. The easy-to-install telescopic door shaft connection structure according to claim 3, characterized in that, The limiting ring is an annular limiting ring, and the two side walls of the limiting ring away from the insertion slot are respectively provided with an avoiding notch; The middle shaft is further sleeved with a decorative buckle cover, the decorative buckle cover is provided with a clamping boss on the side edge facing the limiting ring, and the limiting ring edge is provided with a clamping step matched with the clamping boss; the limiting ring is clamped in the decorative buckle cover through the cooperation of the clamping boss and the clamping step.

5. The easy-to-install telescopic door shaft connection structure according to claim 4, characterized in that, The limiting piece is a U-shaped or C-shaped baffle; the opening end of the baffle is respectively provided with the limiting clamping feet; the insertion slot extends along the inner wall of the limiting ring in the circumferential direction; the outer side of the limiting ring is radially concave and provided with a positioning groove communicated with the insertion slot; two limiting clamping feet enter the limiting ring through the positioning groove, and a part of the limiting clamping feet away from the middle shaft enters the limiting clamping slot and is clamped.

6. The easy-to-install telescopic door shaft connection structure according to claim 5, characterized in that, The inner wall of one end of the baffle away from the opening end is provided with a deformation notch, and the part of the limiting clamping feet in the limiting clamping slot towards the middle shaft is provided with a limiting clamping block; two limiting clamping feet make the limiting clamping block interference abut on the limiting clamping slot under the deformation of the baffle.

7. The easy-to-install telescopic door shaft connection structure according to claim 5 or 6, characterized in that The side wall of at least one side of the end of the limiting clamping feet is outwardly protruding and provided with a positioning protrusion for preventing the limiting clamping feet from loosening; at least one positioning hole matched with the positioning protrusion is arranged on the side wall of the positioning groove in the moving direction of the limiting clamping feet, and the positioning protrusion is located in the positioning hole and fixed.

8. The easy-to-install telescopic door shaft connection structure according to claim 4, wherein The limiting piece is a C-shaped clamping spring, and two limiting clamping feet are located at the opening end of the clamping spring and extend towards each other; the limiting clamping feet can pass through the insertion slot and be clamped in the limiting hole of the middle shaft; the outer periphery of the limiting ring is provided with a supporting portion for installing the clamping spring, and the clamping spring is clamped on the supporting portion by moving away or close to the two limiting clamping feet to open or close; The supporting part comprises a first supporting part and a second supporting part which are oppositely connected around the limiting ring; a positioning groove for setting the first supporting part and the second supporting part and communicating with the insertion slot is radially concave on the outer side of the limiting ring; the insertion slot is arranged at the joint of the first supporting part and the second supporting part and corresponds to the limiting hole of the middle shaft; the diameter of the first supporting part is greater than that of the second supporting part; the clamping spring can be transferred between the first supporting part and the second supporting part, and under the action of its own deformation, the end of the limiting lug enters the corresponding limiting hole of the middle shaft through the insertion slot and is clamped.

9. The easy-to-install telescopic door shaft connection structure according to claim 8, characterized in that One end of the second supporting part close to the insertion slot is provided with a limiting guide part for facilitating the guiding of the limiting lug into the insertion slot; the limiting lug can be moved from the first supporting part or the second supporting part through the limiting guide part, so that the end of the limiting lug is inserted and clamped in the corresponding limiting hole of the middle shaft through the insertion slot.

10. The easy-to-install telescopic door shaft connection structure according to claim 9, characterized in that, The length of the limiting lug is not greater than the difference between the diameter of the first supporting part and the hole diameter of the inner hole of the limiting ring, so that when the clamping spring is clamped on the first supporting part, the end of the limiting lug does not extend into the limiting hole of the middle shaft. The clamping spring rotates around the insertion slot through the limiting lug and is transferred to be clamped on the second supporting part, so that the end of the limiting lug is inserted and clamped in the corresponding limiting hole of the middle shaft through the insertion slot.

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