An adjustable angle door closer

Abstract

The utility model discloses a kind of adjustable closing angle door clamps, including automatic closing mechanism, mounting plate and clamping assembly.Automatic closing mechanism is equipped with output shaft, and its output end peripheral surface is equipped with circular arc part and inlay part respectively.The machine base of clamping assembly is equipped with installation gap, and half-round groove is equipped on its two side support seats to accommodate output shaft circular arc part, and adjusting pressure plate is equipped above, the bottom surface of this pressure plate is equipped with inlay groove matched with output shaft inlay part, and is connected with support seat by two side adjusting screws.By respectively tightening or loosening two side adjusting screws, the included angle between adjusting pressure plate and support seat can be changed, output shaft rotates with adjusting pressure plate, so as to accurately control the rotation angle of output shaft, realize the fine adjustment of door leaf closing position.The utility model's adjustable closing angle door clamp effectively solves the closing deviation problem caused by installation error or wear of traditional door clamp, with the advantages of accurate adjustment, simple operation, good stability and the like.

Description

Technical Field

[0001] This utility model relates to the field of door control hardware technology, and in particular to an adjustable closing angle door clamp. Background Technology

[0002] Currently, common door clamps often experience issues during installation and long-term use, such as door leaf misalignment and inaccurate stopping at the preset angle, affecting usability and aesthetics. Traditional door clamps have a fixed structure and limited automatic closing angle adjustment capabilities. Misalignment can also occur due to component wear or installation errors, making correction difficult. Furthermore, most existing products lack a simple and reliable fine-tuning mechanism. If inaccurate door leaf positioning or misalignment occurs after installation, it often requires disassembly, adjustment, or replacement of the entire door clamp, a cumbersome process with high maintenance costs. Therefore, a door clamp with adjustable closing angle, stable structure, and easy on-site adjustment is needed to improve installation adaptability and long-term reliability. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an adjustable closing angle door clamp, which effectively solves the problem of closing offset caused by installation errors or wear in traditional door clamps, and has the advantages of precise adjustment, simple operation, and good stability.

[0004] The technical solution adopted by this utility model to solve its technical problem is: An adjustable closing angle door clamp, including An automatic closing mechanism is provided with an output shaft, which extends out of both ends of the automatic closing mechanism. One side of the output end of the output shaft is a circular arc portion, and the other side is an embedded portion. A mounting plate is provided on one side of the automatic closing mechanism for mounting on the door frame; A clamping assembly, mounted on the output shaft of the automatic closing mechanism, includes a base and a clamping plate. The base and the clamping plate are used to clamp and install the door leaf. The base has an installation notch in the middle, and the automatic closing mechanism is disposed in the installation notch. Support seats are provided on both sides of the installation notch. The support seats have semi-circular grooves that match the two ends of the output shaft. The semi-circular grooves have first threaded holes on both sides. The arcuate portions at both ends of the output shaft are respectively mounted on the semi-circular grooves and protrude from the semi-circular grooves. An adjusting pressure plate is provided above the semi-circular grooves. The bottom surface of the adjusting pressure plate has an insertion groove that fits into the mounting part. The insertion groove has first mounting holes on both sides. Adjusting screws are installed in the first mounting holes and connected to the first threaded holes. An adjusting gap is provided between the adjusting pressure plate and the support seats. The rotation angle of the output shaft can be adjusted by adjusting the two adjusting screws of the adjusting pressure plate, thereby adjusting the closing angle of the door leaf.

[0005] An adjustable closing angle door clamp according to an embodiment of the present utility model has at least the following beneficial effects: According to some embodiments of the present invention, the mounting portion is a triangular protrusion, and the mounting groove is a triangular groove that fits into the triangular protrusion.

[0006] The advantage is that the triangular interlocking structure provides strong anti-torsion capability, ensuring that the adjustment force is directly and effectively transmitted to the output shaft, making the angle adjustment more precise and stable, and preventing slippage during the adjustment process.

[0007] According to some embodiments of the present invention, the mounting portion is a cutting plane, and the mounting groove is a contour groove that fits into the cutting plane.

[0008] The advantages are: the fit between the plane and the contour groove has a large contact area, uniform force distribution, simple and reliable structure, and is easy to process and manufacture. At the same time, it can effectively transmit torque and ensure the smoothness and accuracy of adjustment.

[0009] According to some embodiments of the present invention, the support base is provided with a receiving groove for accommodating the adjusting pressure plate, and the semi-circular groove is disposed on the bottom surface of the receiving groove.

[0010] The advantages are: the receiving groove provides a stable installation position for the adjusting plate, ensuring the structural compactness and coaxiality of the entire adjusting mechanism, making the adjusting action smoother, and improving the overall rigidity and stability of the component.

[0011] According to some embodiments of the present invention, the clamping plate is provided with an avoidance notch corresponding to the installation notch, and the avoidance notch is used to accommodate the automatic closing mechanism.

[0012] The advantages are: the clearance provides ample space for the automatic closing mechanism, avoids interference between the clamping plate and the automatic closing mechanism, makes the overall structural layout more reasonable and compact, facilitates installation, and protects the automatic closing mechanism from being squeezed.

[0013] According to some embodiments of the present invention, the clamping plate is provided with an adjustment hole corresponding to the first mounting hole, and the adjustment hole is used to accommodate a screwdriver by adjusting the adjustment screw.

[0014] The advantage is that the design of the adjustment hole allows users to adjust directly with tools without disassembling the clamp, greatly simplifying the debugging and maintenance process and enabling quick and convenient non-destructive operation.

[0015] According to some embodiments of the present invention, the top surface of the base is provided with two support columns on both sides of the mounting notch, the top surface of the support columns is provided with a second threaded hole, the clamping plate is provided with a second mounting hole corresponding to the second threaded hole, and a fixing screw is installed in the second mounting hole to fix it to the second threaded hole.

[0016] The benefits are that the support column structure enhances the rigidity of the base, provides a stable and high support point for the clamping plate, ensures the uniform distribution of clamping force, and thus improves the stability and reliability of clamping the door leaf.

[0017] According to some embodiments of this utility model, the two support columns are connected by a support plate.

[0018] The advantage is that the support plate connects the two support columns into a whole frame, which significantly enhances the overall strength and deformation resistance of the base structure, and further ensures the stability of the door clamp in long-term use.

[0019] According to some embodiments of the present invention, the side of the automatic closing mechanism is provided with a third threaded hole, the mounting plate is provided with a third mounting hole corresponding to the third threaded hole, and a fixing screw is installed in the third mounting hole to fix it to the third threaded hole.

[0020] The advantages are: the connection between the hydraulic automatic closing mechanism and the mounting plate is firm and reliable through the fixing screws on the side, the force is reasonable, the installation steps are simplified, and the positional stability of the automatic closing mechanism is guaranteed during operation.

[0021] According to some embodiments of the present invention, the mounting plate is provided with a fourth mounting hole for connecting to the door frame.

[0022] The advantage is that the fourth mounting hole provides a variety of flexible mounting interfaces, allowing the door clamp to easily adapt to different models and specifications of door frames, thus improving the product's versatility and ease of installation.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is an exploded view of an embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 2 A schematic diagram of another embodiment; Figure 4 This is an installation diagram of the present invention; Figure 5 for Figure 4 A diagram illustrating how the door can be adjusted to one side; Figure 6 for Figure 4 A diagram showing how to adjust the door to the other side.

[0026] Reference numerals: Automatic closing mechanism 100, output shaft 110, arc portion 120, insert portion 130, mounting plate 140, base 150, clamping plate 160, mounting notch 170, support base 180, semi-circular groove 190, first threaded hole 200, adjusting pressure plate 210, insert groove 220, first mounting hole 230, adjusting screw 240, adjusting gap 250, receiving groove 260, clearance notch 270, adjusting hole 280, support column 290, second threaded hole 300, second mounting hole 310, support plate 320, third threaded hole 330, third mounting hole 340, fourth mounting hole 350, fixing screw. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] The following is for reference. Figures 1-6 An adjustable closing angle door clamp is described in detail with reference to a specific embodiment. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0029] like Figures 1-2As shown, this application proposes an adjustable closing angle door clamp, including an automatic closing mechanism 100, a mounting plate 140, and a clamping assembly. The automatic closing mechanism 100 has an output shaft 110 extending from both ends. One circumferential side of the output end of the output shaft 110 is a circular arc portion 120, and the other side is a mounting portion 130. The mounting plate 140 is disposed on one side of the automatic closing mechanism 100 for mounting on a door frame. The clamping assembly is mounted on the output shaft of the automatic closing mechanism on the side facing away from the mounting plate 140, and includes a base 150 and a clamping plate 160. The base 150 and the clamping plate 160 are used to clamp and install a door leaf. The base 150 has a mounting notch 170 in the middle, and the automatic closing mechanism 100 is disposed in the mounting notch 170. Support seats 180 are provided on both sides of the mounting notch 170. The support seats 180 have semi-circular grooves 190 that match the two ends of the output shaft 110, and first threaded holes 2 are provided on both sides of the semi-circular grooves 190. 00, the arc-shaped portions 120 at both ends of the output shaft 110 are respectively mounted on the semi-circular groove 190 and protrude from the semi-circular groove 190. An adjusting pressure plate 210 is provided above the semi-circular groove 190. The bottom surface of the adjusting pressure plate 210 is provided with an insert groove 220 that fits into the insert portion 130. The insert groove 220 is provided with first mounting holes 230 on both sides. Adjusting screws 240 are installed in the first mounting holes 230 and connected to the first threaded holes 200. An adjusting gap 250 is provided between the adjusting pressure plate 210 and the support base 180. Figures 4-6 As shown, the rotation angle of the output shaft 110 can be adjusted by adjusting the two adjusting screws 240 of the adjusting pressure plate 210, thereby adjusting the closing angle of the door leaf. The automatic closing mechanism 100 can achieve the closing effect using either hydraulic buffer closing or spring closing. The output shaft 110 can be made of alloy steel to improve wear resistance, and the fit between the arc portion 120 and the semi-circular groove 190 is precision machined to ensure smooth rotation. The fit between the mounting portion 130 and the mounting groove 220 includes, but is not limited to, mechanical fitting structures such as triangular protrusions and triangular grooves, and cut surfaces and contoured grooves. The adjusting screws 240 can be hexagonal socket screws for easy tool operation. The mounting plate 140 can be provided with elongated holes to accommodate different door frame installation positions.

[0030] This technical solution achieves precise control of the door closing angle by adjusting the gap 250 between the pressure plate 210 and the support base 180 in conjunction with a double-screw fine-tuning mechanism. Specifically, when the two adjusting screws 240 are tightened simultaneously, the pressure plate 210 presses down on the mounting part 130, ensuring that the output shaft 110 and the pressure plate 210 are engaged and do not rotate. When the adjusting screws 240 are adjusted upwards while downwards, changing the connection angle between the pressure plate 210 and the support base 180, the relative angle between the output shaft 110 and the support base 180 changes accordingly, thus precisely adjusting the door closing position. This design effectively solves the problem of closing position deviation caused by installation errors or component wear in traditional door clamps, and has advantages such as high adjustment accuracy, simple operation, and stable structure. Compared with existing technologies, this solution can complete angle adjustment without disassembling the door clamp, significantly improving the maintainability and ease of use of the product.

[0031] like Figure 2 As shown, the mounting portion 130 is a triangular protrusion, and the mounting groove 220 is a triangular groove that fits into the triangular protrusion. Specifically, the triangular protrusion can adopt an equilateral triangle or an isosceles triangle structure to balance the fitting strength and processing difficulty. As a preferred embodiment, the top of the triangular protrusion and the triangular mounting groove 220 have flat or rounded corners to reduce contact stress concentration. Thus, this technical solution, through the geometric interlocking of the triangular protrusion and the groove, forms a three-point force support when the adjusting screw 240 is applied, effectively suppressing the circumferential slippage of the output shaft 110, thereby ensuring the accurate reproduction of the door closing angle after each adjustment. In addition, the triangular structure clamping is not prone to circumferential slippage, significantly improving the durability and reliability of the door closing angle.

[0032] like Figure 3 As shown, in another embodiment of this utility model, the fitting part 130 is a cutting plane, and the fitting groove 220 is a contour groove that fits into the cutting plane, specifically similar to a trapezoidal groove. Specifically, the cutting plane is a flat surface formed by milling the output end of the output shaft 110, and its width is proportional to the diameter of the end of the output shaft 110, typically occupying 1 / 3 to 1 / 2 of the diameter of the end of the output shaft 110. The width of the bottom of the contour groove matches the width of the cutting plane. This technical solution achieves torque transmission through the mechanical interlocking of the plane and the contour groove, making the adjustment force distribution more uniform. The resulting technical effects include: firstly, the planar fitting structure eliminates the stress concentration phenomenon commonly found on arc-shaped contact surfaces; secondly, the inclined structure of the contour groove generates a self-locking effect when subjected to torque, effectively preventing the adjusted angle from shifting due to vibration; finally, this structure can be achieved only through conventional machining, reducing manufacturing costs compared to special curved surface structures.

[0033] Specifically, the support base 180 is provided with a receiving groove 260 for accommodating the adjusting pressure plate 210, and a semi-circular groove 190 is provided on the bottom surface of the receiving groove 260. The receiving groove 260 has a rectangular groove structure, and the precise positioning and stable support of the adjusting mechanism are achieved through the structure of the receiving groove 260.

[0034] Furthermore, the clamping plate 160 is provided with a clearance notch 270 corresponding to the mounting notch 170, which is used to accommodate the automatic closing mechanism 100. Specifically, the clearance notch 270 is an opening structure located in the middle of the clamping plate 160, the shape of which matches the shape of the automatic closing mechanism 100, and its size is slightly larger than that of the automatic closing mechanism 100. This effectively solves the spatial interference problem between the clamping plate 160 and the automatic closing mechanism 100, ensuring that it is not restricted by the clamping plate 160 during adjustment, thereby guaranteeing the normal realization of the angle adjustment function. Compared with the prior art, this structure significantly improves the assembly accuracy and reliability of the components while maintaining overall compactness.

[0035] It is understandable that, such as Figure 1 As shown, the clamping plate 160 is provided with an adjustment hole 280 corresponding to the first mounting hole 230. The adjustment hole 280 is used to accommodate a screwdriver to adjust the adjusting screw 240. Specifically, the adjustment hole 280 is a through hole penetrating the thickness of the clamping plate 160, and its axis coincides with the axis of the first mounting hole 230. The hole diameter is 1-2 mm larger than the diameter of a standard screwdriver tip. In a preferred embodiment, the inner wall of the adjustment hole 280 can be provided with a guide slope to facilitate quick tool positioning. Furthermore, the edge of the adjustment hole 280 can be chamfered to avoid scratching the operator. In another embodiment, the adjustment hole 280 can be equipped with a removable dust cover to prevent dust from entering and affecting the adjustment mechanism. Therefore, by providing the adjustment hole 280, after the door clamp is installed, the adjusting screw 240 can be operated directly with a screwdriver or other tools without disassembling the clamping plate 160, thereby achieving fine adjustment of the rotation angle of the output shaft 110. This design effectively solves the technical problem of traditional door clamps requiring repeated disassembly and assembly for adjustment, significantly improving the convenience and efficiency of the adjustment operation. Since the adjustment process does not require damaging the original installation structure, it ensures the overall stability of the door clamp and avoids the problem of component wear caused by frequent disassembly and assembly.

[0036] This application also proposes that the top surface of the base 150 is provided with two support columns 290 on both sides of the mounting notch 170. The top surface of the support columns 290 has a second threaded hole 300, and the clamping plate 160 has a second mounting hole 310 corresponding to the second threaded hole 300. A fixing screw 360 is installed in the second mounting hole 310 and fixed to the second threaded hole 300. Specifically, the support column 290 can be cylindrical or square, and its height is designed to adapt to the thickness of the door leaf, for example, set to 5-15mm. The second threaded hole 300 can be machined as a blind hole or through hole of M4-M6 specifications, preferably made of stainless steel to enhance corrosion resistance. The second mounting hole 310 of the clamping plate 160 is coaxially aligned with the second threaded hole 300 of the support column 290. The fixing screw 360 is a countersunk head or pan head screw, and a rigid connection is formed between the clamping plate 160 and the support column 290 by tightening the fixing screw 360. As a preferred embodiment, the support column 290 and the base 150 are integrally cast. In practice, the pressure of the clamping plate can be finely adjusted by adjusting the tightness of the fixing screws 360, which ensures clamping stability while adapting to the installation needs of door panels of different thicknesses.

[0037] Furthermore, the two support columns 290 are connected to a support plate 320. Specifically, the support plate 320 is laterally connected between the two support columns 290 to form an integral frame structure. As a preferred embodiment, the support plate 320 can be made of metal sheet welded to the support columns 290, or it can be integrally formed with the support columns 290 to form an integral frame structure; alternatively, a reinforcing rib structure can be used to reduce weight while maintaining strength. Thus, the support plate 320 integrates the originally independent support columns 290 into a rigid whole, effectively dispersing the lateral load generated when the door closes. This technical solution strengthens the structure of the base 150 by adding the support plate 320. During repeated opening and closing of the door, the support plate 320 can suppress the deformation of the support columns 290 caused by uneven stress, thereby maintaining the parallelism between the clamping plate 160 and the base 150. Furthermore, the closed structure formed by the support plate 320 and the support columns 290 improves the torsional stiffness and avoids problems such as loose screws or positioning misalignment caused by long-term use. Compared to the independent support column 290 structure without support plate 320, this design significantly improves the overall stability of the clamping assembly, making it particularly suitable for heavy-duty door panels or high-frequency use scenarios.

[0038] It is worth mentioning that, such as Figure 1As shown, the automatic closing mechanism 100 has a third threaded hole 330 on its side, and the mounting plate 140 has a third mounting hole 340 corresponding to the third threaded hole 330. A fixing screw 360 is installed in the third mounting hole 340 and fixed to the third threaded hole 330. Specifically, the third threaded hole 330 can be located at the center of the side of the automatic closing mechanism 100 or symmetrically distributed, and the thread specification can be selected as M4, M5, or M6 standard metric thread. As a preferred embodiment, the number of third threaded holes 330 and third mounting holes 340 can be set to 2-4, arranged in a linear or circumferential array to enhance connection stability. Thus, this technical solution achieves rigid fixation between the automatic closing mechanism 100 and the mounting plate 140 through a side threaded connection. The threaded connection structure allows assembly to be completed without special tools and allows for fine adjustment of the initial angle of the automatic closing mechanism 100 after installation by adjusting the tightening degree. The multi-hole design disperses the impact load when the door closes, avoiding stress concentration caused by a single-point connection. This solution ensures connection strength while facilitating disassembly and maintenance.

[0039] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An adjustable closing angle door clamp, characterized in that, include: An automatic closing mechanism (100) is provided with an output shaft (110). The output shaft (110) extends out of both ends of the automatic closing mechanism (100). One side of the output end of the output shaft (110) is a circular arc portion (120), and the other side is an insert portion (130). Mounting plate (140) is provided on one side of the automatic closing mechanism (100) for mounting on the door frame; A clamping assembly, mounted on the output shaft (110) of the automatic closing mechanism (100), includes a base (150) and a clamping plate (160). The base (150) and the clamping plate (160) are used to clamp and install the door leaf. The base (150) has an installation notch (170) in the middle. The automatic closing mechanism (100) is mounted on the notch (170). Support seats (180) are provided on both sides of the installation notch (170). The support seats (180) have semi-circular grooves (190) that match the two ends of the output shaft (110). The semi-circular grooves (190) have first threaded holes (200) on both sides. The arcuate portions (120) at both ends of the output shaft (110) are respectively mounted on the semi-circular grooves (190). The groove (190) protrudes from the semi-circular groove (190), and an adjusting pressure plate (210) is provided above the semi-circular groove (190). The bottom surface of the adjusting pressure plate (210) is provided with an insert groove (220) that fits into the insert part (130). The insert groove (220) is provided with first mounting holes (230) on both sides. The first mounting holes (230) are equipped with adjusting screws (240) that are connected to the first threaded holes (200). An adjusting gap (250) is provided between the adjusting pressure plate (210) and the support base (180). The rotation angle of the output shaft (110) can be adjusted by adjusting the two adjusting screws (240) of the adjusting pressure plate (210), thereby adjusting the closing angle of the door.

2. The adjustable closing angle door clamp according to claim 1, characterized in that, The mounting part (130) is a triangular protrusion, and the mounting groove (220) is a triangular groove that fits into the triangular protrusion.

3. The adjustable closing angle door clamp according to claim 1, characterized in that, The fitting part (130) is a cutting plane, and the fitting groove (220) is a contour groove that fits into the cutting plane.

4. The adjustable closing angle door clamp according to claim 1, characterized in that, The support base (180) is provided with a receiving groove (260) for accommodating the adjusting pressure plate (210), and the semi-circular groove (190) is provided on the bottom surface of the receiving groove (260).

5. The adjustable closing angle door clamp according to claim 1, characterized in that, The clamp (160) is provided with a clearance notch (270) corresponding to the mounting notch (170), the clearance notch (270) being used to accommodate the automatic closing mechanism (100).

6. The adjustable closing angle door clamp according to claim 1, characterized in that, The clamp (160) is provided with an adjustment hole (280) corresponding to the first mounting hole (230), and the adjustment hole (280) is used to accommodate a screwdriver by adjusting the adjustment screw (240).

7. The adjustable closing angle door clamp according to claim 1, characterized in that, The top surface of the base (150) is provided with two support columns (290) on both sides of the mounting notch (170). The top surface of the support column (290) is provided with a second threaded hole (300). The clamping plate (160) is provided with a second mounting hole (310) corresponding to the second threaded hole (300). The second mounting hole (310) is fitted with a fixing screw (360) and fixed to the second threaded hole (300).

8. An adjustable closing angle door clamp according to claim 7, characterized in that, The two support columns (290) are connected to support plates (320).

9. The adjustable closing angle door clamp according to claim 1, characterized in that, The automatic closing mechanism (100) has a third threaded hole (330) on its side, and the mounting plate (140) has a third mounting hole (340) corresponding to the third threaded hole (330). The third mounting hole (340) is fitted with a fixing screw (360) and fixed to the third threaded hole (330).

10. An adjustable closing angle door clamp according to claim 1, characterized in that, The mounting plate (140) is provided with a fourth mounting hole (350) for connecting to the door frame.

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