A multi-screw hydraulic hinge

Abstract

The present invention relates to a multi-threaded screw hydraulic hinge, which solves the problem that the door panels of existing household appliances with upper and lower opening doors have loud closing noises and cannot be closed slowly and automatically. The hinge comprises a rotating shaft, a shaft sleeve, a linear damping mechanism, a torsion spring, and a torsion spring stopper. When in use, the door panel is fixedly connected to the shaft sleeve. When the torque of the torsion spring is 0, the door panel is in an open state. When closing the door, the shaft sleeve rotates. At this time, the torsion spring stopper blocks the first torsion spring stopper block to prevent the torsion spring stopper from rotating in the door closing direction. The torsion spring generates torsion, which can tightly connect the shaft sleeve and the torsion spring stopper, reducing the closing noise. At the same time, the linear damping mechanism can slowly close the door panel. When opening the door, the rebound of the torsion spring can make the door opening more labor-saving. When the door is opened to the torsion spring torque of 0, the card slot on the shaft sleeve pushes the second torsion spring stopper block to rotate in the door opening direction. At this time, the torsion spring no longer generates torque, making door opening more labor-saving. In addition, the torsion spring is prevented from reverse rotation and damage.

Description

Technical Field

[0001] The invention relates to a multi-threaded hydraulic hinge. Background Art

[0002] The invention solves the tedious operation that requires the operator to provide a large force to hold up the door panel when the door panel is opened upwards, and to hold up the door panel without letting go when the door panel is opened at an angle lower than 90 degrees, as well as the safety and impact noise problems caused by closing the door panel at any angle lower than 90 degrees. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of safety and impact noise caused by closing the door panel of the existing household appliance at any angle below 90 degrees, and the problem that the door cannot be closed slowly at a small angle.

[0004] The technical solution adopted to solve the technical problem proposed by the present invention is as follows: the multi-screw hydraulic hinge of the present invention includes a rotating shaft and a sleeve for installing a door panel, the hinge also includes a linear damping mechanism, a torsion spring and a torsion spring limit block arranged between the rotating shaft and the sleeve, one end of the torsion spring is connected to the sleeve, and the other end is fixedly connected to the torsion spring limit block, the torsion spring limit block is circular, the sleeve is provided with a torsion spring limit block positioning hole that slides with the torsion spring limit block, the rotating shaft is provided with a There is a torsion spring limit block stopper for preventing the torsion spring limit block from rotating in the door closing direction when the torsion spring torque is 0, the torsion spring limit block is provided with a first torsion spring limit block clamping block engaged with the torsion spring limit block stopper, a raised second torsion spring limit block clamping block is provided on the circumference of the torsion spring limit block, the shaft sleeve is provided with a clamping block dislocation groove which cooperates with the second torsion spring limit block clamping block to prevent the torsion spring limit block from rotating with the shaft sleeve, and the edge of the clamping block dislocation groove is provided with a clamping groove which pushes the clamping block to rotate in the door opening direction when the torsion spring torque is 0.

[0005] The technical solutions that further limit the present invention include:

[0006] The linear damping mechanism includes a screw rod connected to the rotating shaft axially for sliding movement and a linear damper fixedly connected to the screw rod. A threaded hole cooperating with the screw rod is provided on the inner wall of the sleeve. The linear damper includes a piston fixedly connected to the screw rod and a cylinder body cooperating with the piston. The piston is axially slidable in the cylinder body, damping oil is provided in the cylinder body, and the cylinder body is fixedly connected to the sleeve; the torsion spring limit block is located on the screw rod.

[0007] The screw rod is provided with a first torsion spring limit block card block dislocation groove for the first torsion spring limit block card block to rotate in the door opening direction.

[0008] The screw rod is a multi-head screw rod.

[0009] The outer periphery of the torsion spring limit block is connected to the shaft sleeve in an axial sliding manner, the screw rod is connected to the torsion spring limit block in an axial sliding and rotational manner, and the torsion spring is sleeved on the cylinder body.

[0010] The piston is provided with a piston rod collar, which is fixedly connected to the screw rod through a pin shaft, and the piston rod collar is sleeved on the pin shaft.

[0011] The tail end of the cylinder body and the shaft sleeve are fixedly connected via a first cylinder body positioning sleeve and the shaft sleeve. The first positioning sleeve is fixedly connected to the shaft sleeve. A first cylinder body positioning hole that cooperates with the tail end of the cylinder body is provided on the first cylinder body positioning sleeve. A second cylinder body positioning hole that cooperates with the cylinder body is provided in the torsion spring limit block. The other end of the cylinder body is positioned through the second cylinder body positioning hole.

[0012] The cylinder tail end, the first positioning sleeve of the cylinder and the shaft sleeve are fixedly connected by pins which pass through the shaft sleeve, the cylinder tail end and the cylinder body respectively.

[0013] A door panel mounting plate is provided on the shaft sleeve, and a door panel mounting hole is provided on the door panel mounting plate.

[0014] The rotating shaft is provided with a rotating shaft connecting rod along the axial direction, and the screw rod is provided with a screw rod mounting hole which is axially slidably matched with the limiting connecting rod.

[0015] When the door is opened and the torsion spring is 0, the slot on the shaft sleeve pushes the second torsion spring limit block block to rotate in the door opening direction. At this time, the torsion spring no longer generates torque, and the door is opened with less effort, and the torsion spring is prevented from being damaged by reverse rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a multi-screw hydraulic hinge of the present invention.

[0017] Figure 2 The figure is a schematic diagram of the exploded structure of a multi-screw hydraulic hinge of the present invention.

[0018] Figure 3 The figure is a schematic cross-sectional view of a multi-screw hydraulic hinge according to the present invention.

[0019] Figure 4 The figure is a schematic cross-sectional view of a multi-screw hydraulic hinge according to the present invention. DETAILED DESCRIPTION

[0020] The structure of the present invention is further described below with reference to the accompanying drawings.

[0021] Reference Figures 1 to 4 A multi-screw hydraulic hinge includes a rotating shaft 1 and a sleeve 2 for mounting a door panel. The hinge also includes a linear damping mechanism 3, a torsion spring 4, and a torsion spring limit block 5 arranged between the rotating shaft and the sleeve. One end of the torsion spring is connected to the sleeve, and the other end is fixedly connected to the torsion spring limit block. The torsion spring limit block is circular. The sleeve 2 is provided with a torsion spring limit block positioning hole 21 that slides with the torsion spring limit block. The rotating shaft 1 is provided with a torsion spring limit block to prevent the torsion spring from being locked when the torque is 0. The torsion spring limit block 5 is provided with a first torsion spring limit block block 51 which is engaged with the torsion spring limit block block, and a raised second torsion spring limit block block 52 is provided on the circumference of the torsion spring limit block. The shaft sleeve 2 is provided with a block dislocation groove 22 which cooperates with the second torsion spring limit block block to prevent the torsion spring limit block from rotating with the shaft sleeve. The edge of the block dislocation groove is provided with a slot which pushes the block to rotate in the door opening direction when the torsion spring torque is 0. When the door is opened and the torsion spring is 0, the slot on the sleeve pushes the second torsion spring limit block block to rotate in the door opening direction. At this time, the torsion spring no longer generates torque, and opening the door is more labor-saving, and damage to the torsion spring is prevented from occurring due to reverse rotation.

[0022] In this embodiment, the linear damping mechanism 3 includes a screw 31 that is axially slidably connected to the rotating shaft and a linear damper 32 that is fixedly connected to the screw. A threaded hole 33 that cooperates with the screw is provided on the inner wall of the sleeve. The linear damper 32 includes a piston 321 that is fixedly connected to the screw and a cylinder 322 that cooperates with the piston. The piston 321 is provided with a piston rod collar 3211, which is fixedly connected to the screw via a pin 34 and is sleeved on the pin. The piston is axially slidable within the cylinder, which is provided with damping oil and is fixedly connected to the sleeve. A torsion spring limit block 6 is located on the screw. In this embodiment, the rotating shaft 1 is provided with an axially extending shaft connecting rod 11. The screw 31 is provided with a screw mounting hole 311 that slidably cooperates with the limit connecting rod. The rotating shaft is clamped to the screw via the shaft connecting rod, making installation convenient. When the sleeve rotates, the threaded hole in the sleeve drives the screw axially, which in turn drives the piston rod axially within the cylinder, generating a damping force that allows the door panel to close slowly. The sleeve and screw are threaded together, ensuring a tight connection and low closing noise. In this embodiment, the screw is a multi-threaded screw. This provides a more stable connection between the sleeve and screw, enabling the door panel to close stably while reducing closing noise.

[0023] In this embodiment, the screw rod 31 is provided with a first torsion spring limit block dislocation slot 312 for rotating the first torsion spring limit block toward the door opening direction. The torsion spring limit block stopper 6 comprises three evenly spaced claws uniformly disposed at the end of the screw rod 31. Three first torsion spring limit block blocks are provided, each evenly spaced. The gaps between the three claws form a first torsion spring limit block dislocation slot, within which the first torsion spring limit block is located. When the torsion spring torque is zero, the torsion spring limit block stopper blocks the first torsion spring limit block, preventing it from rotating toward the door closing direction. When closing the door, the second torsion spring limit block moves within the block dislocation slot, preventing the torsion spring limit block from rotating with the shaft sleeve toward the door closing direction. When opening the door, when the torsion spring reaches zero, the slot on the sleeve pushes the second torsion spring limit block to rotate in the direction of the door opening. At this time, the first torsion spring limit block rotates within the range of the first torsion spring limit block's offset slot, thereby limiting the door panel's opening angle. In this embodiment, the torsion spring's torque can be set to zero when the door panel is opened 95 degrees. When the door continues to open, the sleeve drives the torsion spring limit block to rotate together. When the door panel is opened to 110 degrees, the first torsion spring limit block is locked at the edge of the first torsion spring limit block's offset slot, allowing the door panel to open to its maximum. In specific implementation, the torque can also be set to zero when the door panel is opened to a certain angle according to specific needs; the size of the first torsion spring limit block's offset slot can also be set according to specific needs to limit the maximum opening angle of the door panel.

[0024] In this embodiment, the outer periphery of the torsion spring stopper is axially slidably connected to the sleeve, and the screw is axially slidably and rotationally connected to the torsion spring stopper. The torsion spring sleeve is attached to the cylinder body. The screw is slidably connected to the torsion spring stopper via a three-pronged claw 6. In this embodiment, the rear end of the cylinder body is fixedly connected to the sleeve via a first cylinder locating sleeve 7. The first locating sleeve is fixedly connected to the sleeve. The rear end of the cylinder body, the first cylinder locating sleeve, and the sleeve are fixedly connected by a pin 8 that passes through the sleeve, the rear end of the cylinder body, and the cylinder body, respectively. The first cylinder locating sleeve 7 is provided with a first cylinder locating hole 71 that mates with the rear end of the cylinder body. The torsion spring stopper 5 is provided with a second cylinder locating hole 53 that mates with the cylinder body. The other end of the cylinder body is positioned through the second cylinder locating hole. This ensures that both ends of the cylinder body are positioned within the sleeve, preventing the cylinder body from tilting. When closing the door, the torsion spring generates torque, and the compression of the torsion spring drives the torsion spring stopper to move on the cylinder body. This results in a simple and compact overall structure, with stable connections between components, making door opening and closing more stable and quieter.

[0025] In this embodiment, a door panel mounting plate 21 is provided on the shaft sleeve 2, and a door panel mounting hole 22 is provided on the door panel mounting plate, thereby facilitating the installation of the door panel.

[0026] Although the specific embodiments of the present invention are described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of the present invention. Various modifications and variations that can be made by those skilled in the art without creative effort within the scope described in the claims still fall within the scope of protection of the present invention.

Claims

1. A multi-threaded hydraulic hinge, comprising a rotating shaft and a sleeve for mounting a door panel, characterized in that: The hinge also includes a linear damping mechanism, a torsion spring and a torsion spring limit block arranged between the rotating shaft and the shaft sleeve, one end of the torsion spring is connected to the shaft sleeve, and the other end is fixedly connected to the torsion spring limit block, the torsion spring limit block is circular, the shaft sleeve is provided with a torsion spring limit block positioning hole that slides with the torsion spring limit block, the rotating shaft is provided with a torsion spring limit block stopper that prevents the torsion spring limit block from rotating in the door closing direction when the torsion spring torque is 0, the torsion spring limit block is provided with a first torsion spring limit block clamping block that is clamped with the torsion spring limit block block, the circumference of the torsion spring limit block is provided with a raised second torsion spring limit block clamping block, and the shaft sleeve is provided with a second torsion spring limit block clamping block that prevents the torsion spring limit block from moving with the shaft The sleeve has a dislocation groove for the card block that rotates, and the edge of the dislocation groove for the card block is provided with a card groove that pushes the card block to rotate in the direction of opening the door when the torque of the torsion spring is 0; the linear damping mechanism includes a screw rod axially slidingly connected to the rotating shaft and a linear damper fixedly connected to the screw rod, and a threaded hole cooperating with the screw rod is provided on the inner wall of the sleeve, and the linear damper includes a piston fixedly connected to the screw rod and a cylinder body cooperating with the piston, and the piston is axially slidably arranged in the cylinder body, and damping oil is provided in the cylinder body, and the cylinder body is fixedly connected to the sleeve; the torsion spring limit block stopper is located on the screw rod; the screw rod is provided with a first torsion spring limit block card block dislocation groove for rotating the first torsion spring limit block card block in the direction of opening the door.

2. The multi-threaded hydraulic hinge according to claim 1, characterized in that: The screw rod is a multi-head screw rod.

3. The multi-threaded hydraulic hinge according to claim 1, characterized in that: The outer periphery of the torsion spring limit block is connected to the shaft sleeve in an axial sliding manner, the screw rod is connected to the torsion spring limit block in an axial sliding and rotational manner, and the torsion spring is sleeved on the cylinder body.

4. The multi-threaded hydraulic hinge according to claim 1, characterized in that: The piston is provided with a piston rod collar, which is fixedly connected to the screw rod through a pin shaft, and the piston rod collar is sleeved on the pin shaft.

5. The multi-threaded hydraulic hinge according to claim 1, characterized in that: The tail end of the cylinder body and the shaft sleeve are fixedly connected via a first cylinder body positioning sleeve and the shaft sleeve. The first positioning sleeve is fixedly connected to the shaft sleeve. A first cylinder body positioning hole that cooperates with the tail end of the cylinder body is provided on the first cylinder body positioning sleeve. A second cylinder body positioning hole that cooperates with the cylinder body is provided in the torsion spring limit block. The other end of the cylinder body is positioned through the second cylinder body positioning hole.

6. The multi-threaded hydraulic hinge according to claim 1, characterized in that: The cylinder tail end, the first positioning sleeve of the cylinder and the shaft sleeve are fixedly connected by pins which pass through the shaft sleeve, the cylinder tail end and the cylinder body respectively.

7. The multi-threaded hydraulic hinge according to claim 1, characterized in that: A door panel mounting plate is provided on the shaft sleeve, and a door panel mounting hole is provided on the door panel mounting plate.

8. The multi-threaded hydraulic hinge according to claim 1, characterized in that: The rotating shaft is provided with a rotating shaft connecting rod along the axial direction, and the screw rod is provided with a screw rod mounting hole which is axially slidably matched with the limiting connecting rod.

Images