A sliding adjustment folding arm for a door closer

Abstract

The utility model provides a kind of sliding adjustment folding arm for door closer, including telescopic rod structure and lock position subassembly, the telescopic rod structure includes sleeve rod and the sliding bar that is cooperated in the inside of sleeve rod, the side wall of sleeve rod is opened with telescopic positioning long hole along its length direction, the side wall of sliding bar is provided with the screw hole corresponding with the position of telescopic positioning long hole, the lock position subassembly includes bolt and self-locking washer group, the end face of bolt head towards bolt stem is equipped with annular anti-skid tooth pattern around bolt stem, the self-locking washer group is two pieces of washer with intermeshing annular wedge-shaped inclined surface structure, wherein, the bolt passes through self-locking washer group and telescopic positioning long hole on sleeve rod in turn, and is screw-connected in the screw hole on the sliding bar, the self-locking washer group is clamped between the bolt head and the outer surface of sleeve rod. The utility model relates to the technical field of door closer.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, and in particular to a sliding adjustable folding arm for a door closer. Background Technology

[0002] As a key component of door control hardware, the door closer's core function is to ensure that the door can close automatically, smoothly and accurately after it is opened. The door closer body and the connecting seat are usually connected by a linkage mechanism. The length adjustment of the telescopic rod is the key to achieving precise control of the door opening and closing angle. Existing technologies generally focus on making it easy to adjust after installation, avoiding the trouble caused by repeated disassembly and assembly.

[0003] Utility model patent CN216197390U discloses a door closer, including a door closer body, a connecting seat, and a linkage mechanism. The door closer body is for installation on one of the door bodies or door frames; the connecting seat is for installation on the other of the door bodies or door frames; the linkage mechanism connects the door closer body and the connecting seat, and includes a swing rod and a telescopic rod. One end of the swing rod is hinged to the door closer body, and the other end of the swing rod is hinged to the telescopic rod. The end of the telescopic rod away from the swing rod is hinged to the connecting seat. The telescopic rod includes a insert rod and a sleeve rod. The sleeve rod has a slot for accommodating the insert rod, and the side of the sleeve rod has an adjustment hole communicating with the slot. The adjustment hole is used to accommodate a bolt to fix the sleeve rod. This utility model allows adjustment of the telescopic rod's length after the door closer is installed, thereby adjusting the opening and closing angle of the door closer without removing the door closer, making adjustment convenient.

[0004] However, the aforementioned existing technologies and similar products on the market still have significant shortcomings in practical applications. Their adjustment mechanism relies solely on the locking friction generated by the bolt passing through the elongated adjustment hole on the side wall of the sleeve rod and then being screwed directly into the threaded hole of the insert rod. This single fastening method, under the long-term reciprocating impact and vibration loads from the opening and closing of the door closer, can easily cause the bolt to loosen, resulting in unexpected relative slippage between the insert rod and the sleeve rod. This causes the originally set door opening and closing angle to deviate, affecting the effectiveness and reliability of the door closer, requiring users to frequently retighten and recalibrate.

[0005] Therefore, the inventors urgently need a sliding adjustable folding arm for a door closer to solve the above problems. Utility Model Content

[0006] To address the shortcomings of the existing technology, this utility model provides a sliding adjustable folding arm for a door closer, aiming to solve the problem in the existing door closer telescopic rod adjustment structure where bolts are prone to loosening, leading to unexpected sliding between the sleeve rod and the insertion rod, and unstable door opening and closing angles.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sliding adjustable folding arm for a door closer, comprising a telescopic rod structure and a locking assembly. The telescopic rod structure includes a sleeve rod and a slide rod slidably fitted inside the sleeve rod. A telescopic positioning elongated hole is provided on the side wall of the sleeve rod along its length direction. A threaded hole corresponding to the position of the telescopic positioning elongated hole is provided on the side wall of the slide rod. The locking assembly includes a bolt and a self-locking washer assembly. The end face of the bolt head facing the bolt shank is provided with annular anti-slip teeth surrounding the bolt shank. The self-locking washer assembly consists of two washers with mutually meshing annular wedge-shaped inclined surfaces on both sides. The bolt passes sequentially through the self-locking washer assembly and the telescopic positioning elongated hole on the sleeve rod, and is threaded into the threaded hole on the slide rod. The self-locking washer assembly is sandwiched between the bolt head and the outer surface of the sleeve rod. The annular anti-slip teeth engage and press against the upper surface of the self-locking washer assembly, and the lower surface of the self-locking washer assembly contacts and presses against the outer surface of the sleeve rod.

[0008] Based on the above, the beneficial effect of a sliding adjustable folding arm for a door closer is to solve the problem in the prior art where the bolts are easily loosened, leading to unintended sliding between the sleeve rod and the insert rod, and unstable door opening and closing angles; mainly reflected in:

[0009] 1. This utility model uses a self-locking washer set sandwiched between the bolt head and the outer surface of the sleeve rod. Its double-sided interlocking annular wedge-shaped inclined surface structure generates a self-locking effect when the bolt is tightened, which realizes the prevention of bolt loosening under the vibration load of door opening and closing, and ensures the stability of the relative position of the slide rod and the sleeve rod.

[0010] 2. This utility model increases the frictional resistance of the contact surface by engaging and pressing the annular anti-slip teeth on the bolt head with the upper surface of the self-locking washer assembly, thereby achieving additional fixation of the self-locking washer assembly and further suppressing the rotational loosening of the bolt caused by dynamic load.

[0011] 3. This utility model achieves multiple anti-loosening mechanisms by having bolts sequentially pass through the self-locking washer group and the telescopic positioning elongated hole and then threaded into the threaded hole of the slide rod. The lower surface of the self-locking washer group is pressed against the outer surface of the sleeve rod, effectively eliminating the unexpected slippage between the sleeve rod and the slide rod and maintaining the long-term reliability of the door opening and closing angle.

[0012] Furthermore, the sliding adjustable folding arm also includes a connecting seat and a swing rod. The end of the sliding rod is hinged to the connecting seat, one end of the swing rod is hinged to the end of the sleeve rod, and the other end is used to hinge to the door closer body.

[0013] Based on the above, the beneficial effects of the connecting seat are: as a connecting hub between the sliding rod and the door / door frame, it achieves a flexible connection between the sliding rod and the mounting base through a hinge, enabling the door closer to adapt to angle changes during the opening and closing of the door leaf; the beneficial effects of the swing rod are: as a transmission component between the sleeve rod and the door closer body, it transmits the hydraulic / spring force of the door closer to the telescopic rod structure through the hinged structure at both ends, while allowing the sleeve rod to swing as necessary when the door leaf moves, ensuring the smooth operation of the door closer.

[0014] Furthermore, a rotating seat is provided between the hinge portion of the swing rod and the sleeve rod, a rotating boss is provided on the hinge portion of the swing rod, and a rotating opening is provided on the hinge portion of the sleeve rod. The lower end of the rotating seat is fixedly sleeved on the rotating boss, and the rotating opening is rotatably sleeved on the rotating boss.

[0015] Based on the above, the beneficial effects of the rotating seat are as follows: as a transitional connector between the swing rod and the sleeve rod, the double-layer rotating structure realizes the composite motion freedom between the swing rod and the sleeve rod, enabling the door closer to automatically adjust the force angle during the opening and closing of the door; the beneficial effect of the rotating boss is to provide a stable support point for the rotating seat and the sleeve rod, ensuring the reliability and durability of the hinge part; the beneficial effect of the rotating opening is to allow the sleeve rod to rotate freely around the rotating boss, enabling the door closer to smoothly adjust the angle when the door moves, avoiding jamming or wear caused by mechanical interference.

[0016] Furthermore, the hinge portion of the connecting seat is provided with a rotating collar and a fixing pin. The fixing pin passes through the hinge portion of the connecting seat, the rotating collar is sleeved on the fixing pin, and the hinge portion of the sleeve rod is sleeved on the rotating collar.

[0017] Based on the above, the beneficial effects of the rotating collar are as follows: as a rotating intermediate component between the connecting seat and the sleeve, it reduces the direct friction contact area, realizes smooth rotation of the hinged part with low resistance, and extends the service life of the component; the beneficial effect of the fixing pin is that it penetrates the connecting seat and supports the rotating collar, ensuring the stability and axial positioning accuracy of the entire hinged structure, and preventing the component from falling off or misaligning.

[0018] Furthermore, the telescopic positioning elongated hole is elongated in shape.

[0019] Based on the above, the beneficial effects of the elongated hole design are: it allows the slide bar to be continuously and steplessly adjusted within the sleeve, adapting to the precise setting requirements of different door opening angles; when used with the locking assembly, it ensures that the bolt can be tightened at any position, achieving reliable fixation of the slide bar; compared with the circular or segmented holes of traditional folding arms, it improves the adjustment flexibility while maintaining structural strength and avoiding local deformation or cracking caused by stress concentration.

[0020] To more clearly illustrate the above-mentioned features of this utility model and the objectives it aims to achieve, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 : This is a perspective view of the present invention;

[0022] Figure 2 :for Figure 1 An enlarged schematic diagram of part A;

[0023] Figure 3 : This is a schematic diagram of the swing arm of this utility model;

[0024] Figure 4 : This is a schematic diagram of the sleeve rod of this utility model;

[0025] Figure 5 : This is a schematic diagram of the bolt of this utility model;

[0026] Figure 6 : This is a schematic diagram of the self-locking gasket assembly of this utility model.

[0027] Explanation of reference numerals: 1-Telescopic rod structure, 11-Sleeve rod, 111-Telescopic positioning elongated hole, 112-Rotating port, 12-Slide rod, 121-Threaded hole, 2-Locking assembly, 21-Bolt, 211-Annular anti-slip serration, 22-Self-locking washer set, 221-Annular wedge-shaped inclined surface structure, 3-Connecting seat, 31-Rotating collar, 32-Fixing pin, 4-Swing rod, 41-Rotating boss, 5-Rotating seat. Detailed Implementation

[0028] like Figures 1-6As shown, a sliding adjustable hinge arm for a door closer includes a telescopic rod structure 1 and a locking assembly 2. The telescopic rod structure 1 includes a sleeve rod 11 and a slide rod 12 slidably fitted inside the sleeve rod 11. A telescopic positioning elongated hole 111 is formed on the side wall of the sleeve rod 11 along its length. A threaded hole 121 corresponding to the position of the telescopic positioning elongated hole 111 is provided on the side wall of the slide rod 12. The locking assembly 2 includes a bolt 21 and a self-locking washer assembly 22. The end face of the bolt 21 facing the bolt shank has an annular anti-slip serration 211 surrounding the bolt shank. The self-locking washer assembly 22 consists of two washer pieces with interlocking annular wedge-shaped inclined surface structures 221 on both sides. The bolt 21 passes through the self-locking washer assembly 22 and the telescopic positioning elongated hole 111 on the sleeve rod 11 in sequence, and is threaded into the threaded hole 121 on the slide rod 12. The self-locking washer assembly 22 is sandwiched between the head of the bolt 21 and the outer surface of the sleeve rod 11. The annular anti-slip teeth 211 engage and press against the upper surface of the self-locking washer assembly 22, and the lower surface of the self-locking washer assembly 22 contacts and presses against the outer surface of the sleeve rod 11.

[0029] The sliding adjustable folding arm also includes a connecting seat 3 and a swing rod 4. The end of the sliding rod 12 is hinged to the connecting seat 3, and one end of the swing rod 4 is hinged to the end of the sleeve rod 11, while the other end is hinged to the door closer body.

[0030] A rotating seat 5 is provided between the hinge portion of the swing rod 4 and the sleeve rod 11. A rotating boss 41 is provided on the hinge portion of the swing rod 4, and a rotating opening 112 is provided on the hinge portion of the sleeve rod 11. The lower end of the rotating seat 5 is fixedly sleeved on the rotating boss 41, and the rotating opening 112 is rotatably sleeved on the rotating boss 41.

[0031] The hinge portion of the connecting seat 3 is provided with a rotating collar 31 and a fixing pin 32. The fixing pin 32 passes through the hinge portion of the connecting seat 3, the rotating collar 31 is sleeved on the fixing pin 32, and the hinge portion of the sleeve rod 11 is sleeved on the rotating collar 31.

[0032] The telescopic positioning elongated hole 111 is elongated in shape.

[0033] In summary, the specific embodiments of this utility model are as follows:

[0034] When the door opens or closes, the door closer body drives the sleeve rod 11 to move via the swing rod 4. At this time, if it is necessary to adjust the opening and closing angle of the door, the operator first loosens the bolt 21 of the locking assembly 2 to release the engagement and pressing state between the annular anti-slip teeth 211 and the self-locking washer group 22. At the same time, the two annular wedge-shaped inclined surface structures 221 of the self-locking washer group 22 separate, releasing the pressing force between its lower surface and the outer surface of the sleeve rod 11. Subsequently, the slide rod 12 slides freely inside the sleeve rod 11 along the direction of the telescopic positioning elongated hole 111. The relative distance between the door closer and the door / door frame is changed by the connecting seat 3 hinged at the end of the slide rod 12, realizing stepless adjustment of the folding arm length.

[0035] After adjustment, tighten bolt 21 so that it passes through self-locking washer assembly 22 and telescopic positioning elongated hole 111, and is threaded into threaded hole 121 of slide rod 12. During this process, the annular anti-slip teeth 211 on the head of bolt 21 strongly engages the upper surface of self-locking washer assembly 22. At the same time, the two annular wedge-shaped inclined surface structures 221 of self-locking washer assembly 22 are wedged together under the axial pressure of bolt 21, generating a self-locking effect. The lower surface of self-locking washer assembly 22 is tightly pressed against the outer surface of sleeve rod 11, thus forming a triple anti-loosening mechanism: the thread tightening force of bolt 21, the anti-slip engagement of annular anti-slip teeth 211 and washer, and the self-locking effect of annular wedge-shaped inclined surface of self-locking washer assembly 22, ensuring that slide rod 12 and sleeve rod 11 do not slide relative to each other under the vibration load of repeated opening and closing of door leaf.

[0036] When the sleeve rod 11 is subjected to force, its end rotates around the rotating boss 41 of the swing rod 4 through the rotating port 112, while the rotating seat 5 is fixed on the rotating boss 41 to enhance the support stability; the end of the slide rod 12 rotates around the fixed pin 32 through the rotating collar 31 of the connecting seat 3 to realize the smooth movement transmission of the hinge part; through the above process, this folding arm always maintains a stable length locking state under dynamic load, and accurately maintains the preset opening and closing angle of the door leaf.

[0037] The above description is only the optimal solution embodiment of this utility model and is not intended to limit this utility model. Various modifications or substitutions made by those skilled in the art to this utility model without departing from the essence and protection scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A sliding adjustable folding arm for a door closer, characterized in that: The device includes a telescopic rod structure (1) and a locking assembly (2). The telescopic rod structure (1) includes a sleeve rod (11) and a slide rod (12) that slides inside the sleeve rod (11). The sleeve rod (11) has a telescopic positioning hole (111) along its length on its side wall. The slide rod (12) has a threaded hole (121) on its side wall that corresponds to the position of the telescopic positioning hole (111). The locking assembly (2) includes a bolt (21) and a self-locking washer assembly (22). The bolt (21) has an annular anti-slip tooth pattern (211) around the bolt shank on its end face facing the bolt shank. The self-locking washer assembly... (22) consists of two gaskets with interlocking annular wedge-shaped inclined surfaces (221) on both sides. The bolt (21) passes through the self-locking gasket group (22) and the telescopic positioning elongated hole (111) on the sleeve (11) in sequence, and is threaded into the threaded hole (121) on the slide rod (12). The self-locking gasket group (22) is sandwiched between the head of the bolt (21) and the outer surface of the sleeve (11). The annular anti-slip teeth (211) engage and press with the upper surface of the self-locking gasket group (22). The lower surface of the self-locking gasket group (22) contacts and presses with the outer surface of the sleeve (11).

2. The sliding adjustable folding arm for a door closer according to claim 1, characterized in that: The sliding adjustment arm also includes a connecting seat (3) and a swing rod (4). The end of the slide rod (12) is hinged to the connecting seat (3), one end of the swing rod (4) is hinged to the end of the sleeve rod (11), and the other end is used to hinge to the door closer body.

3. A sliding adjustable folding arm for a door closer according to claim 2, characterized in that: A rotating seat (5) is provided between the hinge of the swing rod (4) and the sleeve rod (11). A rotating boss (41) is provided on the hinge of the swing rod (4), and a rotating opening (112) is provided on the hinge of the sleeve rod (11). The lower end of the rotating seat (5) is fixedly sleeved on the rotating boss (41), and the rotating opening (112) is rotatably sleeved on the rotating boss (41).

4. A sliding adjustable folding arm for a door closer according to claim 2, characterized in that: The hinge portion of the connecting seat (3) is provided with a rotating collar (31) and a fixing pin (32). The fixing pin (32) passes through the hinge portion of the connecting seat (3). The rotating collar (31) is sleeved on the fixing pin (32). The hinge portion of the sleeve rod (11) is sleeved on the rotating collar (31).

5. A sliding adjustable folding arm for a door closer according to claim 1, characterized in that: The telescopic positioning elongated hole (111) is elongated in shape.

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