A right angle gear box for a concealed door closer

Abstract

The utility model discloses a right angle gear box for hidden door closer belongs to door closer technical field. Gear box includes setting in fixed shell one's inside mounting mechanism and setting in fixed shell two's inside lubricating mechanism, and mounting mechanism includes motor, rotating lever, sliding rod and fixed assembly, and motor drives rotating lever to convert the rotary motion into the reciprocating motion of sliding rod, and sliding rod passes through the fixed assembly of connecting rod structure again and drives the clamping block to clamp and fix fixed block. Lubricating mechanism includes electric push rod, flow pipe and sliding assembly, and electric push rod drives flow pipe and drives oil column to slide in storage tank, and adds lubricating oil drop to gear through dropping tube. The utility model discloses through above -mentioned structure, has realized the quick automation installation of gear box and the automatic lubrication maintenance to core gear, has solved the problem that the prior art installs complex, and the maintenance difficulty of unreliable and fixed, has improved installation efficiency, operating stability and service life significantly.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, and in particular to a right-angle gearbox for a concealed door closer. Background Technology

[0002] Concealed door closers are widely used in modern architecture and interior design because they can be installed inside the door leaf or frame without affecting the overall aesthetics of the door. The core transmission component of this type of door closer is usually a compact right-angle gearbox, which is responsible for converting energy and controlling the door leaf to close smoothly at a preset speed.

[0003] To achieve concealed installation, the right-angle gearbox must be precisely secured within a narrow cavity pre-drilled in the door. In existing technology, this installation process typically relies on manual operation; installers place the gearbox into the cavity and then secure it using bolts or other fasteners within a limited operating space.

[0004] However, due to extremely limited installation space, installers find it difficult to apply force effectively, resulting in a time-consuming, labor-intensive, and inefficient installation process. More importantly, it is difficult to ensure that each fastener achieves the ideal locking force. This uncertainty in initial fixation creates potential problems for subsequent use.

[0005] When a door closer is repeatedly subjected to the impact and vibration of opening and closing the door during long-term use, the gearbox, which was not initially securely fixed, is prone to slight displacement or loosening. This loosening will gradually accumulate, eventually leading to unstable operation of the gearbox, abnormal noise, affecting the closing effect, and even shortening the service life of the entire door closer.

[0006] Therefore, this utility model proposes a right-angle gearbox for a concealed door closer to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems of complex and time-consuming installation process, low fixing reliability, and easy loosening due to vibration after long-term use of the right-angle gearbox used in the concealed door closer in the existing technology, this utility model aims to provide a right-angle gearbox for the concealed door closer with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a right-angle gearbox for a concealed door closer, comprising: a fixed housing; and an installation mechanism disposed inside the fixed housing.

[0009] The installation mechanism includes a motor, a rotating rod, a sliding block, a sliding rod, and a fixing component.

[0010] The motor drives a rotating rod via its output shaft, converting electrical energy into mechanical rotational motion. One end of the rotating rod is rotatably connected to a sliding block, which is slidably positioned inside the sliding rod. This structure converts the rotational motion of the rotating rod into the reciprocating linear motion of the sliding rod. The sliding rod further drives a fixed assembly, which includes a clamping block configured to perform clamping or releasing actions on an external fixed block, thereby achieving automated fixation of the entire device.

[0011] Preferably, to improve the guidance and stability of the sliding rod's movement, the mounting mechanism further includes a slide rail and a track. The slide rail is fixedly connected to the outer wall of the sliding rod, while the track is correspondingly formed in the inner wall of the fixed housing. A sliding fit relationship is formed between the slide rail and the track to ensure that the sliding rod moves smoothly along the preset path and prevents deflection.

[0012] Preferably, the structure of the fixing assembly specifically includes a first rotating shaft, a connecting plate, a connecting rod, and a second rotating shaft. The first rotating shaft is fixed to the top of the sliding rod and can slide on the first fixed shell, while the second rotating shaft serves as a fixed fulcrum and is rotatably connected to the top of the first fixed shell.

[0013] Further preferably, to form a highly efficient force transmission linkage, the two ends of the connecting plate are rotatably connected to one end of the rotating shaft and one end of the connecting rod, respectively. The middle part of the connecting rod is rotatably connected to the second rotating shaft, and its other end drives the connecting clamping block. Through precise linkage assembly, the small linear displacement of the sliding rod can be amplified and converted into a powerful clamping force of the clamping block.

[0014] Preferably, the right-angle gearbox further includes a second fixed housing connected to the first fixed housing, and a lubrication mechanism disposed inside the second fixed housing. The second fixed housing has a gear rotatably connected inside, serving as the core transmission component, and the lubrication mechanism is used for automated lubrication and maintenance of the gear.

[0015] Preferably, the lubrication mechanism comprises an electric push rod, a flow tube, a spring, a housing, and a sliding assembly. The output end of the electric push rod serves as a power source to drive the flow tube, which slides through the interior of the housing. The spring is sleeved on the outside of the flow tube and housed within the housing, providing a reset or buffering function.

[0016] More preferably, the sliding assembly includes an oil sampling column, a storage tank, and a dropper. The flow tube drives the oil sampling column to slide within the storage tank. This sliding motion is designed to selectively connect or block the oil passage between the storage tank and the dropper, thereby achieving precise control over the dripping of lubricating oil. Ultimately, the lubricating oil is dripped onto the gear via the dropper.

[0017] Preferably, to facilitate the overall assembly and fixation of the lubrication mechanism, the right-angle gearbox further includes a support shell. The support shell supports the entire lubrication mechanism and is housed and fixed inside the fixed shell, forming a modular structure.

[0018] Preferably, in order to apply the entire device to a real-world scenario, the right-angle gearbox further includes an iron plate. The fixing block is disposed on the iron plate, which serves as a mounting base for fixing the right-angle gearbox to a predetermined position inside the gate.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model solves the problems of complex installation process, high manpower consumption, poor fixation stability and easy loosening due to long-term use of the concealed door closer in the prior art by setting an installation mechanism driven by a motor and finally clamping the fixed block through the clamping block. It achieves the technical effects of fast and automated installation, greatly shortening construction time, reducing labor costs, and providing a stable and reliable clamping force, thereby improving the stability and safety of the door closer in long-term operation.

[0021] 2. This utility model solves the problem in the prior art of concealed door closers, which are difficult to lubricate and maintain regularly due to being installed inside the door, resulting in easy wear of the core gears, noise, and shortened service life. This is achieved by setting up a lubrication mechanism that automatically drips lubricating oil onto the gears via an oil-collecting column driven by an electric push rod. The mechanism enables active and regular lubrication and maintenance of the core transmission gears, significantly reducing wear and operating noise, effectively preventing corrosion, thereby extending the service life of the door closer and ensuring its long-term quiet and smooth operation.

[0022] 3. This utility model solves the problem that traditional concealed door closers sacrifice installation convenience and maintenance in pursuit of aesthetics, by integrating the automated installation mechanism and the automated lubrication mechanism into a concealed gearbox. It achieves the technical effect of efficient installation and intelligent maintenance without damaging the integrity of the door's appearance, thereby improving the product's overall performance, reliability, and user experience. Attached Figure Description

[0023] Figure 1 A three-dimensional schematic diagram of a right-angle gearbox for a concealed door closer proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of a door with a right-angle gearbox for a concealed door closer proposed in this utility model;

[0025] Figure 3This is a schematic diagram of the support shell for a right-angle gearbox used in a concealed door closer according to the present invention.

[0026] Figure 4 This is a schematic diagram of the iron plate of a right-angle gearbox for a concealed door closer proposed in this utility model.

[0027] Figure 5 This is a schematic diagram of the fixing shell of a right-angle gearbox for a concealed door closer according to the present invention.

[0028] Figure 6 This is a schematic diagram of the rotating rod of a right-angle gearbox for a concealed door closer proposed in this utility model.

[0029] Legend:

[0030] 1. Main gate; 2. Supporting shell;

[0031] 3. Lubrication mechanism; 31. Electric push rod; 32. Flow tube; 33. Spring; 34. Outer casing 1;

[0032] 35. Sliding assembly; 351. Oil collection column; 352. Storage tank; 353. Dropper; 354. Gear;

[0033] 4. Iron plate;

[0034] 5. Installation mechanism; 51. Fixed housing 1; 52. Motor; 53. Rotating rod; 54. Sliding block; 55. Sliding rod; 56. Slide rail; 57. Track;

[0035] 58. Fixed component; 581. Rotating shaft one; 582. Connecting plate; 583. Linking rod; 584. Rotating shaft two; 585. Clamping block; 586. Fixing block;

[0036] 6. Fixed shell two. Detailed Implementation

[0037] Example:

[0038] Reference Figures 1 to 6 This utility model provides a right-angle gearbox for a concealed door closer, which aims to solve the problems of difficult gear lubrication and maintenance leading to shortened lifespan, complex installation structure, low fixing efficiency, and insufficient stability in existing concealed door closers.

[0039] like Figure 1 , Figure 2 , Figure 5As shown, the right-angle gearbox for the concealed door closer includes a first fixed housing 51 and a second fixed housing 6 connected to the first fixed housing 51. The first fixed housing 51 has an installation mechanism 5 inside, and the second fixed housing 6 has a lubrication mechanism 3 inside. The entire right-angle gearbox is installed and fixed inside the door 1 by an iron plate 4. A gear 354 is rotatably connected inside the second fixed housing 6, and the function of the lubrication mechanism 3 is to lubricate the gear 354.

[0040] Reference Figure 5 and Figure 6 The installation mechanism 5, one of the core innovations, is described in detail below. The installation mechanism 5 includes a motor 52, a rotating rod 53, a sliding block 54, a sliding rod 55, and a fixing component 58. The motor 52, as the power source, is located inside the fixed housing 51. The output shaft of the motor 52 drives the rotating rod 53. One end of the rotating rod 53 is rotatably connected to the sliding block 54. The sliding block 54 is slidably disposed inside the sliding rod 55. The structure efficiently converts the rotational motion output by the motor 52 into the reciprocating linear motion of the sliding rod 55. To ensure the smoothness of the movement of the sliding rod 55, the installation mechanism 5 also includes a slide rail 56 and a track 57. The slide rail 56 is fixedly connected to the outer wall of the sliding rod 55, and the track 57 is opened in the inner wall of the fixed housing 51. The slide rail 56 and the track 57 slide in cooperation to guide the sliding rod 55 to slide precisely along a preset path.

[0041] The movement of the sliding rod 55 ultimately drives the fixing assembly 58, which includes a first rotating shaft 581, a connecting plate 582, a connecting rod 583, a second rotating shaft 584, and a clamping block 585. The first rotating shaft 581 is fixed to the top of the sliding rod 55 and is slidably connected to a guide groove opened on the first fixing shell 51. The second rotating shaft 584 is rotatably connected to the top of the first fixing shell 51, serving as a stable rotation fulcrum for the connecting rod 583. The two ends of the connecting plate 582 are rotatably connected to the first rotating shaft 581 and the first connecting rod 583, respectively. At one end, the middle part of the connecting rod 583 is rotatably connected to the second rotating shaft 584, and the other end drives the connecting clamp 585. When the sliding rod 55 moves, it drives the connecting plate 582 to swing through the first rotating shaft 581. The connecting plate 582 then drives the connecting rod 583 to rotate around the second rotating shaft 584, thereby accurately converting the linear motion of the sliding rod 55 into the clamping or releasing motion of the clamp 585. The clamp 585 is used to clamp the fixing block 586 set on the iron plate 4. Through the clamping action, the entire right-angle gearbox is quickly and automatically fixed on the iron plate 4.

[0042] Reference Figure 1 and Figure 3The lubrication mechanism 3 includes an electric push rod 31, a flow tube 32, a spring 33, a housing 34, and a sliding assembly 35. The output end of the electric push rod 31 drives the flow tube 32, providing power for the reciprocating motion of the entire mechanism. The flow tube 32 slides through the inside of the housing 34. The spring 33 is sleeved on the outside of the flow tube 32 and housed inside the housing 34. The two ends of the spring 33 abut against the housing of the electric push rod 31 and the inner bottom wall of the housing 34, respectively, to provide corresponding restoring force or buffering effect during the driving process of the electric push rod 31.

[0043] The movement of the flow tube 32 further drives the sliding assembly 35 to work. The sliding assembly 35 includes an oil-collecting column 351, a storage tank 352, and a dropper 353. The oil-collecting column 351 is integrally disposed at the end of the flow tube 32 and slidably disposed within the storage tank 352 containing lubricating oil. The reciprocating sliding of the oil-collecting column 351 within the storage tank 352 is used to selectively connect or block the oil passage between the storage tank 352 and the dropper 353, thereby achieving precise control of the lubricating oil flow. The oil inlet of the dropper 353 is connected to the storage tank 352, and its oil outlet is precisely aligned with the gear inside the fixed housing 6. 354. When the oil circuit is connected, lubricating oil can be dripped onto the meshing surface of gear 354 through dropper 353. To ensure the overall installation stability and structural integrity of the lubrication mechanism 3, the right-angle gearbox also includes a support shell 2 for supporting the lubrication mechanism 3. The entire lubrication mechanism 3 and its outer shell 34 are installed and fixed on the support shell 2, which is housed and fixed inside the fixed shell 6. This integrated automatic lubrication structure ensures that the core transmission components can be continuously and reliably lubricated without manual intervention, greatly improving the smoothness of operation and service life of the device.

[0044] As a preferred refinement of the mounting mechanism 5, in order to achieve a stable conversion from rotary motion to linear motion, one end of the rotating rod 53 is rotatably connected to the motor 52, and the other end is rotatably connected to the sliding block 54. The sliding block 54 is slidably connected to the groove opened in the sliding rod 55. In order to further improve the guiding accuracy and stability of the sliding rod 55 during its movement, a slide rail 56 is fixedly connected to the outer wall of the sliding rod 55, and a corresponding track 57 is opened on the inner wall of the fixed shell 51. A sliding fit is formed between the slide rail 56 and the track 57.

[0045] As a preferred refinement of the fixing component 58, in order to construct a precise linkage mechanism that converts linear motion into clamping action, the first rotating shaft 581 is fixed to the top of the sliding rod 55 and can slide on the first fixed shell 51, while the second rotating shaft 584 is rotatably connected to the top of the first fixed shell 51; the two ends of the connecting plate 582 are rotatably connected to the first rotating shaft 581 and one end of the connecting rod 583, respectively, the middle part of the connecting rod 583 is rotatably connected to the second rotating shaft 584, and its other end drives the connecting clamp 585. The structure can reliably convert the reciprocating motion of the sliding rod 55 into the clamping and releasing action of the clamp 585.

[0046] As a preferred refinement of the lubrication mechanism 3, in order to clarify the assembly relationship of each component, the two ends of the spring 33 abut against the housing of the electric push rod 31 and the inner bottom wall of the outer casing 34 respectively, forming a stable elastic support structure; in order to achieve precise control of the lubricating oil, the oil column 351 is integrally set at the end of the flow tube 32, and the oil passage between the storage tank 352 and the dropper 353 is controlled by its sliding in the storage tank 352; and the entire lubrication mechanism 3 is supported by the support shell 2, which is housed and fixed inside the fixed shell 6.

[0047] To clarify the installation and application method of the entire device, the right-angle gearbox also includes an iron plate 4, and a fixing block 586 is set on the iron plate 4. The iron plate 4 serves as a base for fixing the entire right-angle gearbox inside the preset cavity of the gate 1.

[0048] The working principle is as follows:

[0049] When the right-angle gearbox needs to be quickly installed on the iron plate 4 inside the gate 1, the motor 52 in the installation mechanism 5 is started. The rotation of the motor 52 drives the sliding block 54 through the rotating rod 53, which in turn drives the sliding rod 55 to produce a smooth linear slide under the guidance of the slide rail 56 and the track 57. The linear movement of the sliding rod 55 drives the connecting plate 582 to swing through the rotating shaft 581 at its top. The connecting plate 582 then pushes the connecting rod 583 to rotate around the rotating shaft 584 at the fixed fulcrum. The other end of the connecting rod 583 drives the clamping block 585 to move towards the fixed block 586 and clamp it forcefully. Through this series of continuous mechanical transmissions, the automatic and rapid locking and fixing of the entire device is achieved.

[0050] When the core gear 354 needs lubrication and maintenance, the electric push rod 31 in the lubrication mechanism 3 is activated. The electric push rod 31 drives the flow tube 32 to slide in the outer casing 34 and compresses or releases the spring 33. The flow tube 32 drives the oil-collecting column 351 at its end to slide in the storage tank 352. When the oil-collecting column 351 moves to the predetermined position, the oil passage inside it connects the lubricating oil in the storage tank 352 with the inlet of the dropper 353. Under the action of gravity or pressure, the lubricating oil drips through the dropper 353 onto the surface of the gear 354, completing an automated lubrication operation.

Claims

1. A right-angle gearbox for a concealed door closer, comprising a fixed housing (51), characterized in that, The right-angle gearbox also includes an installation mechanism (5) disposed inside the fixed housing (51); the installation mechanism (5) includes a motor (52), a rotating rod (53), a sliding block (54), a sliding rod (55), and a fixing assembly (58); the output shaft of the motor (52) is driven to connect to the rotating rod (53), one end of the rotating rod (53) is rotatably connected to the sliding block (54), the sliding block (54) is slidably disposed inside the sliding rod (55), the sliding rod (55) is driven to connect to the fixing assembly (58), and the fixing assembly (58) includes a clamping block (585) for clamping or releasing an external fixing block (586).

2. The right-angle gearbox for a concealed door closer according to claim 1, characterized in that, The installation mechanism (5) further includes a slide rail (56) and a track (57); the slide rail (56) is fixedly connected to the outer wall of the sliding rod (55), and the track (57) is opened on the inner wall of the fixed shell (51). The slide rail (56) and the track (57) are slidably engaged to guide the sliding rod (55) to reciprocate.

3. The right-angle gearbox for a concealed door closer according to claim 1, characterized in that, The fixing assembly (58) also includes a first rotating shaft (581), a connecting plate (582), a connecting rod (583), and a second rotating shaft (584); the first rotating shaft (581) is fixed to the top of the sliding rod (55) and slidably connected to the first fixing shell (51), and the second rotating shaft (584) is rotatably connected to the top of the first fixing shell (51).

4. The right-angle gearbox for a concealed door closer according to claim 3, characterized in that, The two ends of the connecting plate (582) are rotatably connected to one end of the first rotating shaft (581) and one end of the connecting rod (583), respectively; the middle part of the connecting rod (583) is rotatably connected to the second rotating shaft (584), and the other end of the connecting rod (583) is driven to connect to the clamping block (585) so as to convert the linear motion of the sliding rod (55) into the clamping motion of the clamping block (585).

5. The right-angle gearbox for a concealed door closer according to claim 1, characterized in that, The right-angle gearbox also includes a second fixed shell (6) connected to the first fixed shell (51) and a lubrication mechanism (3) disposed inside the second fixed shell (6); a gear (354) is rotatably connected inside the second fixed shell (6), and the lubrication mechanism (3) is used to lubricate the gear (354).

6. The right-angle gearbox for a concealed door closer according to claim 5, characterized in that, The lubrication mechanism (3) includes an electric push rod (31), a flow tube (32), a spring (33), a housing (34), and a sliding assembly (35); the output end of the electric push rod (31) is connected to the flow tube (32), the flow tube (32) slides through the inside of the housing (34), and the spring (33) is sleeved on the outside of the flow tube (32) and housed in the housing (34).

7. The right-angle gearbox for a concealed door closer according to claim 6, characterized in that, The sliding assembly (35) includes an oil-collecting column (351), a storage tank (352), and a dropper (353); the flow tube (32) drives the oil-collecting column (351) to slide within the storage tank (352) to selectively connect or block the oil passage between the storage tank (352) and the dropper (353), thereby controlling the lubricating oil to be dripped onto the gear (354) via the dropper (353).

8. The right-angle gearbox for a concealed door closer according to claim 5, characterized in that, The right-angle gearbox also includes a support shell (2) for supporting the lubrication mechanism (3), which is housed inside the fixed shell (6).

9. The right-angle gearbox for a concealed door closer according to claim 1, characterized in that, The right-angle gearbox also includes an iron plate (4); the fixing block (586) is disposed on the iron plate (4), and the iron plate (4) is used to fix the right-angle gearbox inside the gate (1).

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