Quick-mounting type telescopic door shaft rod connecting structure and mounting method thereof

Abstract

The invention discloses a fast-assembly type telescopic door shaft rod connecting structure which 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; connection between the connecting rod and the middle shaft is effectively fixed through the limiting assembly, and meanwhile the assembling process is simplified; compared with a traditional connecting structure, according to the scheme, after the limiting assemblies are integrally pre-assembled and integrally installed, stable connection is formed at the hinged position of the middle shaft and the connecting rod, through innovative application of the integrally-designed limiting pieces, the assembling efficiency is greatly improved, the assembling efficiency is improved by 60% or above, complexity is reduced, and the connecting structure is suitable for large-scale production and use.

Description

Technical Field

[0001] The present invention relates to the technical field of telescopic door technology, and in particular to a quick-install telescopic door shaft rod connection structure and an installation method thereof. Background Art

[0002] Telescopic doors are door products used to improve the safety and convenience of building entrances or other areas. Their main feature is that they can be adjusted in length according to actual needs to adapt to different space conditions and uses. The key components of telescopic doors include drive devices, door frames, connecting rods and running wheels. Among them, the door frame is composed of columns and the shaft connecting the columns, and the connecting rod is an important component connecting adjacent door frames. In order to ensure the stability and durability of the connecting rod, a specific connection structure is usually required to fix the connecting rod and reduce the friction and wear of the metal contact surface.

[0003] The existing telescopic door connection structure mainly fixes the rotating shaft by setting a sleeve on the rotating shaft or by welding a retaining ring or a positioning sleeve on the rotating shaft on both sides of the connecting rod to fix the connecting rod. For example, the connecting rod structure disclosed in the Chinese utility model patent with publication number CN201367848Y and patent name "central axis connection structure of telescopic door" uses a limit tube, a sleeve, a decorative hardware cover, a fixing glue and a nail to fix the central axis. Although the fixing of the connecting rod can be achieved, the following problems still exist:

[0004] 1. The method of setting a sleeve on the rotating shaft is costly, time-consuming and labor-intensive. At the same time, the sleeve has limited space and application scope. It can only be used between the connecting rods in the middle and is difficult to be applied to the side sections of the door row.

[0005] 2. Welding retaining rings or positioning sleeves on the rotating shafts on both sides of the connecting rod will make the rotating shaft and the connecting rod non-detachable, which is inconvenient for installation and maintenance, increases the cost of disassembly and maintenance, and once a welding error occurs, the component will be scrapped; at the same time, due to the use of a large pipe sleeve and a small pipe to separate the connecting rod, the space for selecting a large central shaft diameter is limited, and a large central shaft cannot be used, which will damage the firmness of the entire door body;

[0006] 3. In the existing connection methods such as sleeves, the metal contact surface has large friction noise and is easy to wear, which affects the service life of the telescopic door and requires frequent replacement of the connection structure, increasing the cost of use;

[0007] 4. The existing connection structure is exposed on the outside, which affects the appearance and reduces the overall quality of the telescopic door.

[0008] Therefore, how to design a new connection structure that can not only improve the convenience of installation, but also reduce the installation cost, while improving the service life and overall quality of the telescopic door is an important issue facing the current telescopic door connection technology. Summary of the invention

[0009] In order to solve the technical problems existing in the above-mentioned prior art, one of the purposes of the present invention is to provide a quick-install telescopic door shaft rod connection structure, which utilizes a limit assembly to effectively fix the connection between the connecting rod and the central axis, while simplifying the assembly process; compared with the traditional connection structure, this solution greatly improves the assembly efficiency by more than 60% through the innovative application of integrated design, and reduces the complexity, making it suitable for large-scale production and use.

[0010] The second purpose of the present invention is to provide an installation method for a quick-install telescopic door shaft connection structure, which is simple and convenient to operate, reduces metal friction, jamming and other problems during the installation process, and avoids installation errors or the need for multiple adjustments due to improper alignment in the prior art. It saves time and effort and significantly improves installation efficiency. The ingenious design of the structure provides users with a more friendly operating experience.

[0011] One of the purposes of the present invention is achieved through the following technical solutions:

[0012] A quick-install telescopic door shaft rod connection structure, the shaft rod comprises a central axis installed on the telescopic door frame and a connecting rod hinged to the central axis; the shaft rod connection structure comprises a limit assembly detachably fixedly installed at the hinge between the central axis and the connecting rod;

[0013] The limiting assembly includes a limiting piece detachably clamped on the central axis; the central axis is provided with a limiting portion at the hinge with the connecting rod for limiting and fixing the limiting piece; at least a portion of the limiting piece can enter the limiting portion and be clamped in the limit position, so that the limiting assembly can be detachably fixed on the central axis and located on both sides of the hinge with the connecting rod, thereby limiting the relative movement of the connecting rod and the central axis.

[0014] Specifically, the limiting member includes limiting pins for fixing the central axis from opposite sides of the central axis, and the limiting parts are respectively provided on opposite sides of the central axis, and the limiting parts are limiting slots or limiting holes adapted to the limiting pins; the two limiting pins respectively enter the limiting slots or limiting holes and are limitedly clamped, so that the limiting assembly can be detachably fixed on the central axis.

[0015] Furthermore, the limit assembly includes an annular limit retaining ring that can be slidably mounted on the central axis, and the limit retaining ring is provided with a slot that passes through the limit retaining ring, and two of the slots are relatively arranged on the limit retaining ring; the slot is correspondingly connected to the limit slot or limit hole of the central axis, and the limit pin can pass through the slot and be clamped in the limit slot or limit hole.

[0016] Furthermore, the limiting member is a U-shaped or C-shaped baffle; the open ends of the baffle are respectively provided with the limiting pins; the slot is circumferentially extended along the inner wall of the limiting retaining ring; the outer side surface of the limiting retaining ring is radially concave and provided with a positioning groove connected to the slot; by pushing the baffle laterally, the two limiting pins enter the limiting retaining ring through the positioning groove, and the part of the limiting pin facing the central axis direction enters the limiting slot and is limited and clamped.

[0017] Furthermore, a deformation notch is provided on the inner wall of one end of the baffle away from the opening end, and a limiting block is provided on a portion of the limiting foot toward the central axis; under the deformation action of the baffle, the two limiting feet cause the limiting block to interfere with the limiting groove.

[0018] Furthermore, a positioning protrusion is protruding outward on the side wall of at least one side of the end of the limiting pin to prevent the limiting pin from loosening; at least one positioning hole that is compatible with the positioning protrusion is provided on the side wall of the positioning groove along the moving direction of the limiting pin, and the positioning protrusion is located in the positioning hole and fixed.

[0019] Furthermore, the limit stop ring is provided with two positioning holes along the moving direction of the limit clamping foot, and the two positioning holes are respectively located on both sides of the inner hole of the limit stop ring.

[0020] One of the purposes of the present invention can also be achieved by the following technical solutions:

[0021] The limiting member is a C-shaped retaining spring, and the two limiting pins are located at the open end of the retaining spring and extend toward each other; the limiting pin can pass through the slot and be clamped in the limiting hole of the central axis; the outer periphery of the limiting retaining ring is provided with a supporting portion for installing the retaining spring, and the retaining spring is clamped on the supporting portion to be opened or closed by the two limiting pins moving away from or approaching each other.

[0022] As an example, the C-shaped retaining spring is any one of a retaining spring, a retaining ring, a retaining ring, a snap ring, a buckling ring or a spring buckle.

[0023] As a further example, the support portion is substantially step-shaped, recess-shaped or bowl-shaped.

[0024] Furthermore, the supporting part includes a first supporting part and a second supporting part which are relatively connected around the limiting retaining ring; the outer side surface of the limiting retaining ring is radially recessed inwardly with a positioning groove for setting the first supporting part and the second supporting part and connected to the slot; the slot is set at the connection between the first supporting part and the second supporting part, and corresponds to the limiting hole of the central axis; the diameter of the first supporting part is larger than the diameter of the second supporting part; the retaining 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 clamping foot enters the corresponding limiting hole on the central axis through the slot and is clamped.

[0025] It is further explained that a limiting guide portion is provided on one end of the second supporting portion close to the slot, which is convenient for guiding the limiting pin to enter the slot; by pushing or pulling the retaining spring, the limiting pin can be moved from the second supporting portion to the slot via the limiting guide portion, so that the end of the limiting pin can be inserted into the corresponding limiting hole on the central axis via the slot and clamped.

[0026] It is further explained that the length of the limit pin is not greater than the difference between the diameter of the first supporting part and the aperture of the inner hole of the limit retaining ring, so that when the retaining spring is clamped on the first supporting part, the end of the limit pin does not extend into the limit hole of the central axis; the retaining spring is rotated around the slot as the axis through the limit pin and transferred to the second supporting part, so that the end of the limit pin is inserted into the corresponding limit hole on the central axis through the slot and clamped.

[0027] It is further explained that the limit retaining ring is an annular limit retaining ring, and the outer walls on both sides of the limit retaining ring away from the slot are respectively provided with avoidance notches; the central axis is also sleeved with a decorative buckle cover, and the edge of the decorative buckle cover facing the limit retaining ring is provided with a clamping boss, and the edge of the limit retaining ring is provided with a clamping step matched with the clamping boss; the limit retaining ring is clamped in the decorative buckle cover through the cooperation of the clamping boss and the clamping step.

[0028] It is further explained that a wear-resistant sleeve is also provided at the hinge between the central shaft and the connecting rod.

[0029] The second object of the present invention is achieved by the following technical solutions:

[0030] A method for installing the quick-install telescopic door shaft connecting structure as described above comprises the following steps:

[0031] Step 1: hinge the connecting rod and the central shaft together, wherein the connecting rod is located between the two limiting grooves or limiting holes on the central shaft;

[0032] Step 2: insert the limit retaining ring with the limit member into the middle shaft from the end of the middle shaft and move it until the slot of the limit retaining ring is aligned with the limit groove or limit hole of step 1;

[0033] Step 3: By rotating or pushing and pulling the limiting member, the end of the limiting foot is inserted into the corresponding limiting groove or limiting hole on the central axis through the slot and clamped.

[0034] Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] 1. The present invention improves the connection structure between the central axis and the connecting rod of the telescopic door, and the limit piece and the limit retaining ring are assembled in an integrated manner. After the overall installation, a stable connection is formed at the hinge of the central axis and the connecting rod, which limits the axial movement of the connecting rod, enhances the safety of the connection, and ensures the stability of the telescopic door during use;

[0036] The present invention integrates the limiting member and the limiting retaining ring into a symmetrical design, which is not distinguished between left and right, and is universal on both sides. During the assembly process, operations such as direction selection and alignment are omitted, thereby avoiding assembly errors, simplifying the assembly steps, and greatly improving the assembly efficiency. At the same time, the integrated design of the limiting member and the limiting retaining ring is also characterized in that the limiting member is first fixed with the assistance of the positioning groove before assembly by utilizing the positioning groove of the limiting retaining ring to ensure that it does not fall off. During assembly, it is only necessary to push and pull the limiting member so that the limiting clamping foot enters the limiting clamping groove or the limiting hole of the central axis and is firmly clamped to complete the assembly.

[0037] Therefore, the installation operation of the central axis connecting rod connection structure of the present invention is simple and convenient. It only needs to install the limit ring of the assembled limited components onto the central axis, and then the limit clamping foot can be aligned and clamped with the central axis by moving the limit component; the metal friction, jamming and other problems in the installation process are reduced, and the installation errors or multiple adjustments required due to improper alignment in the prior art are avoided, saving time and effort; compared with the traditional structure, the limit assembly of the present invention improves the assembly efficiency by at least 60% without increasing additional costs; at the same time, no complicated tools or multi-step fixing process are required, which greatly reduces the difficulty of assembly.

[0038] 2. The limit retaining ring structure of the present invention is cleverly designed. First, by optimizing the cooperation between the limit member, the limit retaining ring and the positioning groove, the number and complexity of components are reduced, making the overall structure more compact, convenient for manufacturing and assembly, significantly improving production efficiency, reducing material waste, and reducing overall production costs; maintenance and replacement do not require disassembly of multiple components, and can be completed with simple operations, greatly reducing maintenance costs and time; at the same time, the present invention has a variety of flexible implementation methods. In one preferred implementation method, the limit member is designed as a U-shaped retaining plate, and a positioning protrusion is provided on the retaining plate and a corresponding positioning hole is provided on the limit retaining ring. Before assembly, the retaining plate can be prevented from loosening by the cooperation of the positioning protrusion and the positioning hole, and the pushing of the retaining plate during the assembly process is not affected, and the operation is convenient; and due to the design of the positioning groove, after the assembly is completed, the positioning groove of the limit retaining ring can not only ensure the connection stability of the retaining plate to the centering axis, but also can use the positioning groove to hide the retaining plate well, achieving multiple goals at one stroke.

[0039] 3. In another preferred embodiment of the present invention, the limiter is designed as a C-shaped elastic retaining spring, which utilizes its own adaptive elastic structure design to enable it to be flexibly adjusted under different conditions to adapt to various connection situations, thereby enhancing its flexibility and adaptability during use.

[0040] On the other hand, the structural coordination between the first supporting part, the second supporting part and the retaining spring, as well as the ingenious design of introducing the limiting guide part, greatly simplifies the process of the limiting pin entering the slot and the limiting hole, significantly improves the assembly accuracy and the simplicity of the operating process, and the retaining spring is also more secure 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 retaining spring and the control of the length of the limiting pin, it is ensured that when the retaining spring is clamped on the first supporting part, it will not extend into the limiting hole, and effective limiting can be achieved without the need for additional structure. The design is simple and ingenious.

[0041] 4. The limit assembly of the present invention has a compact structure. The annular positioning groove of the limit retaining ring can be used to fix and assemble the limit part and complete the limit connection between the limit assembly and the central axis and the connecting rod. The overall structure is more compact and the space utilization is optimized. The simple and reasonable design and the coordination of the limit part can effectively prevent loosening in the clamping state, thereby enhancing the stability and safety of the connection. At the same time, the straight edge avoidance notch design of the limit retaining ring not only improves the clamping effect of the decorative buckle cover, but also optimizes the accommodating space of the limit part, while enhancing the aesthetics of the overall appearance.

[0042] 5. The central axis connecting rod connection structure of the present invention has the advantages of enhanced connection stability, significantly improved assembly efficiency, efficient and convenient installation, compact structure and efficient manufacturing, improved assembly accuracy and simplicity, etc. It significantly improves the connection performance between the central axis and the connecting rod of the telescopic door, has the characteristics of high efficiency, flexibility, stability and beauty, and has good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the limit assembly and decorative buckle cover structure of the quick-install telescopic door shaft connecting structure of Example 1 of the present invention;

[0044] Figure 2 This is a schematic diagram of the assembly of the limit assembly and the central axis of the quick-install telescopic door shaft connecting structure of Example 1 of the present invention before assembly;

[0045] Figure 3 It is a schematic diagram of the assembly direction and the assembled state of the limit assembly and the central axis of the quick-install telescopic door shaft rod connection structure of Example 1 of the present invention;

[0046] Figure 4 This is a schematic diagram of the assembly of the limiting assembly of the quick-install telescopic door shaft connecting structure according to Embodiment 2 of the present invention before assembly;

[0047] Figure 5 This is a schematic diagram of the assembly of the stopper assembly of the quick-install telescopic door shaft connecting structure according to Embodiment 2 of the present invention;

[0048] Figure 6 This is a schematic structural decomposition diagram of a limit assembly of a quick-install telescopic door shaft connecting structure according to Embodiment 2 of the present invention;

[0049] Figure 7 It is a schematic diagram of the assembly direction and the assembled state of the limit assembly and the central axis of the quick-install telescopic door shaft connecting structure of Example 2 of the present invention;

[0050] Figure 8 This is a schematic diagram of the assembly state of the central axis connecting rod of the quick-install telescopic door axis connecting structure of Example 1-2 of the present invention;

[0051] Fig. 9 This is a schematic diagram of the limit assembly and decorative buckle cover structure of the quick-install telescopic door shaft connecting structure of Example 3 of the present invention;

[0052] Fig.10 This is a schematic diagram of the assembly of the limit assembly of the quick-install telescopic door shaft connecting structure of Example 3 of the present invention;

[0053] Fig.11 This is a schematic diagram of the structure of the limiting assembly of the quick-install telescopic door shaft connecting structure according to Embodiment 4 of the present invention;

[0054] Fig.12This is a schematic diagram of the assembly of the limit assembly of the quick-install telescopic door shaft connecting structure of Example 4 of the present invention;

[0055] Fig.13 This is a schematic diagram of the structure of the limit assembly of the quick-install telescopic door shaft connecting structure of Example 5 of the present invention;

[0056] Fig.14 This is a schematic diagram of the assembly of the limit assembly of the quick-install telescopic door shaft connecting structure of Example 5 of the present invention;

[0057] Fig.15 This is a schematic diagram of the assembly state of the quick-install telescopic door shaft connecting structure of Example 3-5 of the present invention;

[0058] Fig.16 It is a schematic diagram of the assembly state of the telescopic door row of the quick-install telescopic door shaft rod connection structure of Examples 1-5 of the present invention.

[0059] In the figure:

[0060] 1. Limiting assembly; 11. Limiting member; 111. Limiting foot; 112. Deformation notch; 113. Limiting block; 114. Positioning protrusion; 12. Limiting retaining ring; 121. Slot; 122. Positioning groove; 123. Positioning hole; 124. Supporting part; 1241. First supporting part; 1242. Second supporting part; 1243. Limiting guide part; 125. Avoidance notch; 126. Snap-on step; 2. Decorative buckle cover; 21. Snap-on boss;

[0061] 10, central axis; 101, limiting part; 20, connecting rod; 30, door frame; 40, sliding cover; R1, diameter of the first supporting part; R2, diameter of the second supporting part; R3, aperture of the inner hole of the limiting retaining ring. DETAILED DESCRIPTION

[0062] In order to facilitate the understanding of the present invention, the technical solutions and advantages of the invention are further described in detail below in conjunction with the accompanying drawings and embodiments. The mechanisms or methods not described in the present invention can refer to the prior art. The specific structure and characteristics of the present invention are described below by way of example, which should not constitute any limitation to the present invention. At the same time, any of the technical features mentioned below (including implicit or disclosed), as well as any technical features directly displayed or implied in the figure, can continue to be arbitrarily combined or deleted between these technical features, so as to form more other embodiments that may not be directly or indirectly mentioned in the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0063] It should be noted that the construction and arrangement of the present invention shown in a number of different exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., size, structure, shape, and proportion of various elements, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments.

[0064] Example 1

[0065] like Figure 1-3 , 8 and 16, this embodiment 1 provides a quick-install telescopic door shaft rod connection structure, the shaft rod includes a central axis 10 installed on the telescopic door frame and a connecting rod 20 hinged to the central axis 10; the shaft rod connection structure includes a limit assembly 1 detachably arranged at the hinge between the central axis 10 and the connecting rod 20;

[0066] Specifically, the limiting assembly 1 includes a limiting member 11 detachably clamped on the central axis; the central axis 10 is provided with a limiting portion 101 for limiting and fixing the limiting member 11 at the hinge with the connecting rod 20; at least a portion of the limiting member 11 can enter the limiting portion 101 and be clamped in a limited position, so that the limiting assembly 1 can be detachably fixed on the central axis 10 and located on both sides of the hinge with the connecting rod 20, thereby limiting the relative movement of the connecting rod 20 and the central axis 10.

[0067] In this embodiment, the limiter is configured to be inserted into the limiter portion preset on the opposite side of the outer wall of the central axis and firmly fixed on the central axis, and the relative movement of the connecting rod and the central axis is prevented by the limiting effect of the limiter. At least a part of the limiter can enter the limiter portion and be clamped by the limiter portion, which means that at least a part of the structure of the limiter can form a fixed match with the limiter portion to achieve locking and fixing of the central axis.

[0068] The structure of the limit assembly is further introduced. Specifically, the limit member 11 includes limit pins 111 for fixing the central axis from opposite sides of the central axis, and the limit parts 101 are respectively provided on opposite sides of the central axis 10. The limit parts 101 are limit slots matched with the limit pins 111. The two limit pins 111 respectively enter the limit slots and are clamped in the limit position, so that the limit assembly 1 can be detachably fixed on the central axis 10.

[0069] As a further preferred embodiment, the limit assembly 1 also includes an annular limit retaining ring 12 that can be slidably mounted on the central axis 10, and the limit retaining ring 12 is provided with a slot 121 that passes through the limit retaining ring 12, and two pairs of the slots 121 are arranged on the limit retaining ring 12; the slot 121 is correspondingly connected to the limit card slot of the central axis 10, and the limit card pin 111 can pass through the slot 121 and be clamped in the limit card slot or the limit hole.

[0070] Optionally, the limiting member 11 is a U-shaped or C-shaped baffle; the open ends of the baffle are respectively provided with the limiting pins 111; the slots 121 are circumferentially extended along the inner wall of the limiting retaining ring 12; the outer side surface of the limiting retaining ring 12 is radially concave and provided with a positioning groove 122 connected to the slot 121; by pushing the baffle laterally, the two limiting pins 111 enter the limiting retaining ring 12 through the positioning groove 122, and a part of the limiting pins 111 toward the direction of the central axis 10 enters the limiting slot and is limited and clamped.

[0071] Specifically, the limit retaining ring 12 is an annular limit retaining ring, and the outer walls on both sides of the limit retaining ring 12 away from the slot 121 are respectively provided with parallel avoidance notches 125; the central axis 10 is also sleeved with a decorative buckle cover 2, and the decorative buckle cover 2 is provided with a clamping boss 21 on the edge of the side facing the limit retaining ring 12, and the edge of the limit retaining ring 12 is provided with a clamping step 126 adapted to the clamping boss 21; the limit retaining ring 12 is clamped in the decorative buckle cover 2 through the cooperation of the clamping boss 21 and the clamping step 126. In this embodiment, the baffle is a metal baffle, the limit ring and the decorative buckle cover can be made of materials such as hard plastic, and the snap-fitting boss is formed by the decorative cover being radially convexly arranged near the edge of the limit ring; the snap-fitting step is a concave design on the edge of the limit ring, and when the edge of the decorative buckle cover is squeezed and deformed and stuck on the snap-fitting step, and formed into one body with the limit ring and the baffle, when the connecting rod is deformed by force during the operation of the door body, the baffle is limited in position in the decorative buckle cover and will not slide out, thereby ensuring that the connecting rod is firmly limited. At the same time, the decorative cover can also hide the limit ring well, thereby improving the aesthetics of the connecting structure.

[0072] In this embodiment, the vertical cross-section of the slot is fan-shaped and radially penetrates the inner wall of the limit retaining ring, and the positioning groove is an annular groove designed to be concave along the outer surface of the limit retaining ring, and openings are provided on both sides of the positioning groove that are adapted to the overall width of the two limit clamping feet of the baffle plate, and the limit clamping feet of the baffle plate enter through the openings, and when the baffle plate is in an assembled state, the opposing parts of the two limit clamping feet are partially located in the slot; when the limit retaining ring is integrally sleeved on the central axis, the part of the limit clamping foot located in the slot enters the limit clamping groove and is limited and clamped to achieve fixation to the central axis.

[0073] As a further preferred embodiment, a positioning protrusion 114 is protruded outward on the side wall of at least one side of the end of the limiting clamping foot 111 to prevent the limiting clamping foot 111 from loosening; at least one positioning hole 123 matching the positioning protrusion 114 is provided on the side wall of the positioning groove 122 along 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.

[0074] To be more specific, the limit retaining ring 12 is provided with two positioning holes 123 along the moving direction of the limit clamping foot 111 , and the two positioning holes 123 are respectively located on both sides of the inner hole of the limit retaining ring 12 .

[0075] In the present embodiment, the limit retaining ring structure is cleverly designed. First, by optimizing the cooperation between the limit member, the limit retaining ring and the positioning groove, the number and complexity of components are reduced, making the overall structure more compact, convenient for manufacturing and assembly, significantly improving production efficiency, reducing material waste, and reducing overall production costs; maintenance and replacement do not require disassembly of multiple components, and can be completed with simple operations, greatly reducing maintenance costs and time; at the same time, the present invention has a variety of flexible implementation methods. In one preferred implementation method, the limit member is designed as a U-shaped retaining plate, and a positioning protrusion is provided on the retaining plate and a corresponding positioning hole is provided on the limit retaining ring. Before assembly, the retaining plate can be prevented from loosening by the cooperation of the positioning protrusion and the positioning hole, and the pushing of the retaining plate during the assembly process is not affected, and the operation is convenient; and due to the design of the positioning groove, after the assembly is completed, the positioning groove of the limit retaining ring can not only ensure the connection stability of the retaining plate to the centering axis, but also use the positioning groove to hide the retaining plate well, achieving multiple goals at one stroke.

[0076] In order to further improve the limiting effect of the connecting rod, a wear-resistant sleeve is further provided at the hinge between the central shaft and the connecting rod (not shown in the drawings).

[0077] In this embodiment, the connecting rod is connected to the central axis through the door frame 30, and the end of the central axis is slidably connected to the door frame 30 through the sliding cover 40; the movement is smooth and the noise is low.

[0078] In this embodiment, the blocking piece and the limit retaining ring are integrated into a symmetrical design, which is not divided into left and right, and both sides are common. During the assembly process, operations such as direction selection and alignment are omitted, thereby avoiding assembly errors, simplifying the assembly steps, and greatly improving the assembly efficiency. At the same time, the integrated design of the blocking piece and the limit retaining ring is also characterized in that the blocking piece is first fixed by means of the positioning groove, positioning protrusion, positioning hole and other structures before assembly by using the positioning groove of the limit retaining ring to ensure that it does not fall off. During assembly, it is only necessary to push the limit member so that the limit clamping foot enters the limit clamping groove or the limit hole of the central axis and is firmly clamped to complete the assembly.

[0079] Therefore, the installation operation of the central axis connecting rod connection structure of the present invention is simple and convenient. It only needs to install the limit retaining ring of the assembled limit member on the central axis, and then the limit clamping foot can be aligned and clamped with the central axis by moving the limit member; the metal friction, jamming and other problems in the installation process are reduced, and the installation errors caused by improper alignment or the need for multiple adjustments in the prior art are avoided, saving time and effort; compared with the traditional structure, the limit assembly of the present invention improves the assembly efficiency by at least 60% without increasing additional costs.

[0080] The installation method of the telescopic door shaft connecting structure of the present embodiment 1 comprises the following steps:

[0081] Step 1: hinge the connecting rod and the central shaft together, wherein the connecting rod is located between the two limiting grooves on the central shaft;

[0082] Step 2: insert the limit retaining ring with the limit member into the middle shaft from the end of the middle shaft and move it until the slot of the limit retaining ring is aligned with the limit groove of step 1;

[0083] Step 3: Push the limiting member so that the end of the limiting foot is inserted into the corresponding limiting groove on the central axis through the slot and clamped.

[0084] The above installation method is for the installation connection of a specific central axis and a connecting rod. The telescopic door row is usually assembled from several cross-hinged central axes and connecting rods. This application does not make specific restrictions on the order of overall assembly of the door row and the number of central axes or connecting rods selected, as long as it is assembled according to needs.

[0085] The installation operation of the central axis connecting rod connection structure of the present invention is simple and convenient. It only needs to install the limit retaining ring with the retaining plate onto the central axis, and then push the retaining plate to make the limit clamping foot complete the positioning and extend into the limit clamping slot to achieve clamping. It reduces metal friction, jamming and other problems during the installation process, and avoids installation errors or the need for multiple adjustments caused by improper positioning in the prior art, saving time and effort, and significantly improving installation efficiency. The ingenious design of the structure provides users with a more user-friendly operating experience.

[0086] Example 2

[0087] like Figure 4-8 As shown in Figures 16, the difference between this embodiment 2 and embodiment 1 is that the baffle is provided with a structure for increasing deformation tension, specifically: a deformation notch 112 is provided on the inner wall of one end of the baffle away from the opening end, and a limiting block 113 is provided on a part of the limiting pin 111 facing the central axis direction; under the deformation action of the baffle, the two limiting pins 111 make the limiting block 113 interfere with the limiting groove.

[0088] In this embodiment, the deformation notch 112 is arranged on the inner wall of the U-shaped baffle away from the opening end. The deformation notch 112 can be triangular, semicircular, etc. in cross-section. A triangular notch is preferred in this embodiment. At the same time, a limiting block is provided on the part of the limiting pin that is located in the limiting slot in the direction of the central axis. In this design, since the distance between the limiting blocks is reduced, when the limiting pins of the baffle enter the limiting slot from the opposite sides of the central axis respectively, an interference abutment effect with the limiting slot will be generated. The triangular deformation notch can increase the deformation interference clamping force and further improve the stability of the connection.

[0089] The assembly method of the second embodiment can refer to the assembly method of the first embodiment.

[0090] Example 3

[0091] like Figure 9-10 As shown in , 15-16, the difference between this embodiment 3 and embodiment 1 is that the limiting member 11 is a C-shaped retaining spring, and the two limiting pins 111 of the limiting portion 101 of the central axis 10 are located at the open end of the retaining spring and extend toward each other; the limiting pins 111 can pass through the slots 121 and be clamped in the limiting holes of the central axis 10; the outer periphery of the limiting retaining ring 12 is provided with a supporting portion 124 for installing the retaining spring, and the retaining spring is clamped on the supporting portion 124 to be opened or closed by the two limiting pins 111 moving away from or approaching each other.

[0092] In this embodiment, the limiting holes can be axially distributed on both sides of the connecting rod along the outer wall of the central axis. At the same time, the limiting pins can be spring-type pins, which are respectively inserted into the corresponding limiting holes to limit the relative movement of the connecting rod and the central axis.

[0093] In this embodiment, the limit retaining ring 12 is provided with a slot 121 that penetrates the limit retaining ring 12 in the radial direction, and the limit clamping pin 111 can pass through the slot 121 and be clamped in the limit hole of the central shaft 10. In this embodiment, under the plug-in clamping action of the limit clamping pin of the clamping spring and the limit hole, the limit retaining ring is respectively fixed on both sides of the connecting rod and limits the relative movement of the connecting rod and the central shaft.

[0094] The present invention utilizes the structural design of the limit retaining ring and the deformation effect of the retaining spring, and realizes that the limit clamping pin is extended into the limit hole of the central axis through the slot and clamped by various convenient methods such as axial rotation or circumferential forward pushing or backward pulling along the first supporting part or the second supporting part, thereby greatly improving the assembly efficiency of the limit assembly; at the same time, no complicated tools or multi-step fixing process are required, which greatly reduces the difficulty of assembly.

[0095] Optionally, the C-shaped retaining spring is any one of a retaining spring, a retaining ring, a retaining ring, a retaining ring, a buckle ring or a spring buckle. In other optional embodiments, the retaining spring may also be other limiting members capable of realizing the functions of the present invention.

[0096] To be more specific, the support part 124 includes a first support part 1241 and a second support part 1242 which are relatively connected and arranged around the inner hole of the limit retaining ring 12; the slot 121 is arranged at the connection between the first support part 1241 and the second support part 1242, and corresponds to the limit hole of the central axis 10; the diameter R1 of the first support part 1241 is greater than the diameter R2 of the second support part 1242; the diameter of the first support part and the second support part refers to the diameter of the circle where the fulcrum of the outer wall and the limit clamping foot are in contact, that is, the height of the first support part and the second support part is different. The main body of the clamping spring is sleeved on the outside of the first support part 1241, and the clamping spring can be transferred from the first support part 1241 to the second support part 1242, and under the action of its own deformation, the end of the limit clamping foot 111 is inserted into the corresponding limit hole on the central axis 10 through the slot 121 and clamped.

[0097] In this embodiment, the retaining spring is directly attached to the limit retaining ring. After the limit retaining ring is slidably mounted on the central axis, the retaining spring is simply selected or pushed and pulled to ensure the accuracy of assembly, reduce metal friction on the central axis and other components, and reduce installation difficulties such as multiple adjustments or reinstallation due to improper alignment, thereby achieving quick and convenient installation.

[0098] Furthermore, the second support portion 1242 is provided with a limiting guide portion 1243 at one end close to the slot 121 for guiding the limiting foot 111 to enter the slot 121; the end of the limiting foot 111 is inserted into the corresponding limiting hole on the central axis 10 through the slot 121 and clamped by pulling the clamp spring. The limiting guide portion 1243 is generally in a step shape, a nest shape or a bowl shape.

[0099] In this embodiment, the number and complexity of components are reduced by optimizing the cooperation between the stopper and the support portion. At the same time, the adaptive elastic structure design of the clip spring itself enables it to be flexibly adjusted under different conditions to adapt to various connection conditions, thereby enhancing flexibility and adaptability during use.

[0100] On the other hand, the structural coordination between the first supporting part, the second supporting part and the retaining spring, as well as the ingenious design of introducing the limiting guide part, greatly simplifies the process of the limiting pin entering the slot and the limiting hole, significantly improves the assembly accuracy and the simplicity of the operating process, and the retaining spring is also more secure 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 retaining spring and the control of the length of the limiting pin, it is ensured that when the retaining spring is clamped on the first supporting part, it will not extend into the limiting hole, and effective limiting can be achieved without the need for additional structure. The design is simple and ingenious.

[0101] Optionally, the outer side surface of the limit retaining ring 12 is radially inwardly concave with a positioning groove 122 adapted to the retaining spring; the first supporting portion 1241 and the second supporting portion 1242 are relatively annularly arranged on the positioning groove 122. In this embodiment, the limit assembly of the present invention has a compact structure, and the first supporting portion, the second supporting portion and the retaining spring can be assembled and the limit connection between the limit assembly and the central shaft and the connecting rod can be completed through the annular positioning groove of the limit retaining ring. The overall structure is more compact and the space utilization is optimized; the reasonable diameter design and the matching of the retaining spring ensure that looseness can be effectively prevented in the clamped state, and the stability and safety of the connection are enhanced.

[0102] Optionally, the limit retaining ring 12 is an annular limit retaining ring 12, and the outer walls of the limit retaining ring 12 on both sides away from the slot 121 are respectively provided with parallel avoidance notches 123. In this embodiment, the straight-edge avoidance notch design of the limit retaining ring not only improves the clamping effect of the decorative buckle cover, but also enhances the aesthetics of the overall appearance.

[0103] In order to improve the connection stability and reduce metal friction, optionally, a wear-resistant sleeve (not shown in the drawings) may be provided at the hinge between the central shaft 10 and the connecting rod 20 .

[0104] The installation method of the limit assembly of this embodiment 3 is as follows:

[0105] Step 1: hinge the connecting rod and the central shaft together, wherein the connecting rod is located between the two limiting holes on the central shaft;

[0106] Step 2: Insert the limit retaining ring with the retaining spring into the middle shaft from the end of the middle shaft and move it until the slot of the limit retaining ring is aligned with the limit hole of step 1;

[0107] Step 3: Pull the clamping spring so that the end of the limiting clamping foot is inserted into the corresponding limiting hole on the central axis through the slot and clamped under the deformation of the clamping spring itself.

[0108] Example 4

[0109] like Figure 11-12As shown in 15-16, the difference between this embodiment 4 and embodiment 3 is that the retaining spring is arranged on the outer side of the two supporting parts 1242, and the end of the second supporting part 1242 close to the slot 121 is provided with a limiting guide part 1243 for guiding the limiting pin 111 into the slot 121; by pushing the retaining spring, the limiting pin 111 can be moved from the second supporting part 1242 to the slot direction via the limiting guide part 1243, so that the end of the limiting pin 111 can be inserted into the corresponding limiting hole on the central axis 10 via the slot 121 and clamped.

[0110] The assembly method is different from that of Example 3 in that, in step 3, the retaining spring is pushed so that, under the action of its own deformation, the end of the limiting clamping foot is inserted into the corresponding limiting hole on the central axis through the slot and clamped.

[0111] Example 5

[0112] like Figure 13-15 As shown, the difference between this embodiment 5 and embodiment 3 is that the length of the limit pin 111 is not greater than the diameter difference between the diameter R1 of the first supporting portion 1241 and the inner hole R3 of the limit retaining ring 12, so that when the retaining spring is clamped on the first supporting portion 1241, the end of the limit pin 111 does not extend into the limit hole of the central axis 10; the retaining spring is rotated through the limit pin 111 with the slot 121 as the axis and transferred to the clamp on the second supporting portion 1242, so that the end of the limit pin 111 is inserted into the corresponding limit hole on the central axis 10 through the slot 121 and clamped.

[0113] The installation method thereof is different from that of Example 3 in that: in step 3, the retaining spring is rotated so that, under the action of its own deformation, the end of the limiting clamping foot is inserted into the corresponding limiting hole on the central axis through the slot and clamped.

[0114] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A quick-install telescopic door shaft connecting structure, wherein the shaft comprises a central shaft mounted on the telescopic door frame and a connecting rod hingedly connected to the central shaft; characterized in that: The shaft-rod connection structure comprises a limit assembly detachably fixedly mounted at the hinge between the middle shaft and the connecting rod; The limiting assembly includes a limiting piece that is detachably clamped on the central axis; the central axis is provided with a limiting portion at the hinge with the connecting rod for limiting and fixing the limiting piece; at least a portion of the limiting piece can enter the limiting portion and be clamped in the limit position, so that the limiting assembly can be detachably fixed on the central axis and located on both sides of the hinge between the central axis and the connecting rod, thereby limiting the relative movement of the connecting rod and the central axis.

2. The quick-install telescopic door shaft connecting structure according to claim 1, characterized in that: The limiting member includes limiting pins for fixing the central axis from opposite sides of the central axis respectively, and the limiting parts are respectively provided on opposite sides of the central axis, and the limiting parts are limiting slots or limiting holes adapted to the limiting pins; the two limiting pins respectively enter the limiting slots or limiting holes and are limitedly clamped, so that the limiting assembly can be detachably fixedly installed on the central axis.

3. The quick-install telescopic door shaft connecting structure according to claim 2, characterized in that: The limit assembly includes an annular limit retaining ring that can be slidably mounted on the central axis, and the limit retaining ring is provided with a slot that passes through the limit retaining ring, and two slots are relatively arranged on the limit retaining ring; the slot is correspondingly connected to the limit card slot or the limit hole of the central axis, and the limit card foot can pass through the slot and be clamped in the limit card slot or the limit hole.

4. The quick-install telescopic door shaft connecting structure according to claim 3, characterized in that: The limiting member is a U-shaped or C-shaped baffle; the open ends of the baffle are respectively provided with the limiting pins; the slot is circumferentially extended along the inner wall of the limiting retaining ring; the outer side surface of the limiting retaining ring is radially concave and provided with a positioning groove connected to the slot; the two limiting pins enter the limiting retaining ring through the positioning grooves, and a part of the limiting pins toward the central axis direction enters the limiting slot and is limited and clamped.

5. The quick-install telescopic door shaft connecting structure according to claim 4, characterized in that: A deformation notch is provided on the inner wall of one end of the baffle away from the opening end, and a limiting block is provided on a portion of the limiting foot located in the limiting slot in the direction of the central axis; under the deformation action of the baffle, the two limiting feet make the limiting block interfere with the limiting slot.

6. The quick-install telescopic door shaft connecting structure according to claim 4 or 5, characterized in that: A positioning protrusion is protruded outward on the side wall of at least one side of the end of the limiting clamping foot to prevent the limiting clamping foot from loosening; at least one positioning hole matched with the positioning protrusion is provided on the side wall of the positioning groove along the moving direction of the limiting clamping foot, and the positioning protrusion is located in the positioning hole and fixed.

7. The quick-install telescopic door shaft connecting structure according to claim 3, characterized in that: The limiting member is a C-shaped retaining spring, and the two limiting pins are located at the open end of the retaining spring and extend toward each other; the limiting pin can pass through the slot and be clamped in the limiting hole of the central axis; the outer periphery of the limiting retaining ring is provided with a supporting portion for installing the retaining spring, and the retaining spring is clamped on the supporting portion to be opened or closed by the two limiting pins moving away from or approaching each other.

8. The quick-install telescopic door shaft connecting structure according to claim 7, characterized in that: The supporting part includes a first supporting part and a second supporting part which are relatively connected and arranged around the limiting retaining ring; the outer side surface of the limiting retaining ring is radially concave with a positioning groove for setting the first supporting part and the second supporting part and connected to the slot; the slot is set at the connection between the first supporting part and the second supporting part, and corresponds to the limiting hole of the central axis; the diameter of the first supporting part is larger than the diameter of the second supporting part; the retaining 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 clamping foot enters the corresponding limiting hole on the central axis through the slot and is clamped.

9. The quick-install telescopic door shaft connecting structure according to claim 8, characterized in that: A limiting guide portion is provided on one end of the second supporting portion close to the slot for guiding the limiting pin into the slot; the limiting pin can be moved from the first supporting portion or the second supporting portion via the limiting guide portion so that the end of the limiting pin can be inserted into the corresponding limiting hole on the central axis via the slot and clamped.

10. The quick-install telescopic door shaft connecting structure according to claim 8, characterized in that: The length of the limiting clamping foot is not greater than the diameter difference between the diameter of the first supporting part and the inner hole of the limiting retaining ring, so that when the retaining spring is clamped on the first supporting part, the end of the limiting clamping foot does not extend into the limiting hole of the central shaft; The clamping spring is rotated around the slot as the axis through the limiting clamping pin and transferred to the second supporting part, so that the end of the limiting clamping pin is inserted into the corresponding limiting hole on the central axis through the slot and clamped.

11. The quick-install telescopic door shaft connecting structure according to claim 4, 5 or 10, characterized in that: The outer walls on both sides of the limit retaining ring are respectively provided with avoidance notches; the central axis is also sleeved with a decorative buckle cover, and the edge of the decorative buckle cover facing the limit retaining ring is provided with a clamping boss, and the edge of the limit retaining ring is provided with a clamping step matched with the clamping boss; the limit retaining ring is clamped in the decorative buckle cover through the cooperation of the clamping boss and the clamping step.

12. The method for installing the quick-install telescopic door shaft connecting structure according to any one of claims 4 to 11, characterized in that: The following steps are involved: Step 1: hinge the connecting rod and the central shaft together, wherein the connecting rod is located between the two limiting grooves or limiting holes on the central shaft; Step 2: insert the limit retaining ring with the limit member into the middle shaft from the end of the middle shaft and move it until the slot of the limit retaining ring is aligned with the limit groove or limit hole of step 1; Step 3: By rotating or pushing and pulling the limiting member, the end of the limiting clamping foot is inserted into the corresponding limiting groove or limiting hole on the central axis through the slot and clamped.

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