WO2013185349A1 - Flexible hinge of intelligent structure - Google Patents

Abstract

A flexible hinge of an intelligent structure relates to the field of flexible hinge, and in particular to a structural improvement of a flexible hinge used on an oven door. The technical deficiency that a conventional flexible hinge is complex in structure, poor in reliability, and inconvenient to use is solved. The flexible hinge comprises a first hinge arm (1) that can be adaptively mounted on a door frame and a second hinge arm (2) that can be adaptively mounted on a door. A lever (13) is disposed in a tail portion of a strip-shaped shell (10). A roller (113) is connected at a U-shaped fork (111) through a roller pin shaft (112). A cam bit (21) matching the roller (113) is disposed on a rear side of the second hinge arm (2) behind a hinge shaft (3). The cam bit (21) comprises a concave position (212), a protruding position (211), and a cam surface (213). When the opening angle is less than 5 degrees, a certain closing force is provided; the door is continued to be open under the effect of a force, and when the opening angle is greater than 15 degrees and less than 30 degrees, the door can automatically return when the external force disappears and stop at a position with an opening angle of about 15 degrees, which facilitates observation; in an opening range of 30 to 88 degrees, the door can stop at a position of any angle within the range.

Description

 Elastic hinge of intelligent structure

 Technical field

 The present invention relates to the field of elastic hinge technology, and more particularly to structural improvements in resilient hinges for use on oven doors.

 Background technique

Since the hinge in the electrical equipment is not only the movable connection between the main body of the device and the door, but also the sealing of the door when it is closed, the state of the door during the opening process, and the smoothness of the door closing process, The traditional elastic hinge generally adopts a spring, a damping mechanism and a latching structure to achieve a certain position after opening and a balance within a specific angle range, and the average speed is smooth during the closing process, and the seal is closed after the door is closed. The traditional elastic hinge has complex structure and poor reliability, especially the failure rate of the damping mechanism is high. The state of the door after being opened is restricted by the card structure, and the card position structure is inconvenient to use. If the card position is stable, it needs to be larger. The external force is operated, and if the card position is poor, it is easy to fall off.

 Summary of the invention

In summary, the object of the present invention is to solve the problem that the conventional elastic hinge has a complicated structure, poor reliability, and inconvenient use, and an elastic hinge of an intelligent structure is proposed.

In order to solve the technical problem proposed by the present invention, the technical solution adopted is: an elastic hinge of an intelligent structure, comprising a first hinge arm adapted to be mounted on the door frame and a second hinge fitably mounted on the door The first hinge arm includes a strip-shaped housing, and a front end of the strip-shaped housing is movably connected to a rear end of the second hinge arm through a hinge shaft; a spring push-pull rod is disposed in the strip-shaped housing, in the spring The compression rod is provided with a compression spring; The utility model is characterized in that: a lever is arranged in the tail of the strip-shaped housing, and the lever is movably connected to the strip-shaped housing through the fulcrum pin; a connecting arm is provided between the upper end of the lever and the tail end of the spring push-pull rod, and the connecting arm The tail end is movably connected to the upper end of the lever through the first pin shaft, and the front end of the connecting arm is movably connected to the tail end of the spring push rod through the second pin shaft; a linkage rod is disposed between the lower end of the lever and the second hinge arm The tail end of the linkage rod is movably connected to the lower end of the lever through the third pin shaft, and the front end of the linkage rod is movably connected to the second hinge arm through the fourth pin shaft; the bottom of the strip housing is bent into 90 degree spring retainer with a U-shaped groove for the spring push-pull rod to snap into the middle of the spring stop. The front end of the spring push-pull rod has a U-shaped bifurcation. The first and second ends of the compression spring on the spring push-pull rod are respectively placed on the U-shaped bifurcation of the spring push-pull rod and the spring block of the strip-shaped housing; A roller is connected to the glyph by a roller pin, and both ends of the roller pin extend in two side walls of the strip housing, and strips are formed on the two side walls of the strip housing to match the pin of the roller a limiting slot, on the rear side of the second hinge arm on the hinge shaft, a cam block that cooperates with the roller The cam block includes a concave position, a convex position and a cam surface;

When the hinge is not installed, when the external force is not applied, the roller stops in the concave position of the cam block under the action of the compression spring and the cam block, and the force is stuck in this position without shaking, the first hinge arm (1) and the first Two hinge arms (2) are smaller than A 90 degree angle to ensure that the hinge has a closing force when mounted on the door.

 When the hinge is mounted on the door and the door is in the closed position, the first hinge arm and the second hinge arm are 90 The angle of the angle, the center of gravity of the door mounted on the second hinge arm, the torque generated by the hinge shaft as the fulcrum and the torque generated by the linkage rod being compressed by the elastic force of the compression spring, the torque generated by the hinge shaft as a fulcrum, the door is closely attached to the oven frame On, to achieve a tight seal;

 When the door is opened, the angle between the first hinge arm and the second hinge arm is increased, in the process [X1] When the roller is not past the convex position of the cam block, the door mounted on the second hinge arm loses the external force, and the door automatically returns to the closed position under the action of the compression spring, the roller and the cam block; When the roller is in the convex position of the cam block, the position where the door is located is a force change position, the force of opening the door before the convex position is changed from small to large, and is the largest at the convex position, and becomes smaller after the convex position; the roller is in the cam When the surface position door loses external force, the door automatically returns to the opening under the action of the compression spring, the roller, the cam block and the center of gravity of the door. 15 ± 3 degrees (ie, the first hinge arm and the second hinge arm are at an angle of 105 ± 3 degrees);

When the angle between the first hinge arm and the second hinge arm continues to be expanded, after the roller is disengaged from the cam surface of the cam block, the force generated by the center of gravity of the door mounted on the second hinge arm is rotated by the hinge axis as a fulcrum The moment and the linkage rod are balanced by the elastic pulling force of the compression spring with the hinge shaft as a fulcrum.

 When the convex position on the cam block corresponds to the roller, the angle between the second hinge arm and the first hinge arm is 95 degrees.

The center of gravity of the door mounted on the second hinge arm is a torque generated by the hinge shaft as a fulcrum and the torque of the linkage rod is balanced by the elastic tension of the compression spring with the hinge shaft as a fulcrum, and the second hinge arm and the second The angle at which a hinge arm is located is 120 to 178 degrees.

 The second hinge arm has a minimum angle of 87 degrees with the first hinge arm.

 The tail end of the spring push-pull rod or the connecting arm is provided with a buffer groove that cooperates with the second pin shaft.

 The strip limiting groove and the buffer groove limit the maximum angle between the second hinge arm and the first hinge arm to be 178 degrees.

 The second hinge arm and the coupling rod are hingedly mounted with an oil-free bearing in the front hole.

 The second hinge arm and the outer casing are hingedly mounted with a sleeve in the front hole.

 The fourth pin shaft is movably connected to the second hinge arm after passing through the oilless bearing.

 The hinge shaft is movably connected to the second hinge arm through the sleeve.

 The strip housing of the first hinge arm is a U-shaped groove structure.

The invention has the beneficial effects that the first hinge arm of the invention is mounted on the main body of the device in a horizontal state, and the second hinge arm is mounted on the door to connect the door with the device, so that the door opening angle of the device is less than 5 When it is not over the cam block, it will automatically return to the closed state when it loses the external force, and has a certain closing force to make the door tightly sealed. When the position is convex, the force is abruptly changed to produce the maximum opening force; the door continues to be forced to open. At more than 15 When the degree is less than 30 degrees, the door can automatically return to the position and stop at about 15 degrees for easy observation. At this time, a certain external force must be applied to close the door; in 30 to 88 When the degree is within the range, the door can be stopped at any angular position within the range; the invention does not use the card position and the damping mechanism, and the structure is stable and reliable, and the failure rate is low.

 DRAWINGS

 Figure 1 is a schematic perspective view of the present invention;

 2 is a schematic exploded view of the present invention;

 Figure 3 is a schematic cross-sectional view of the present invention;

 Figure 4 is a schematic structural view of the present invention before being installed and used;

 FIG. 5 is a schematic structural view of the door when the door is closed in the application process of the present invention; FIG.

 6 is a schematic structural view of the door when the door is at 15 degrees in the application process;

 7 is a schematic structural view of a door at a 45 degree opening in an application process of the present invention;

 Figure 8 is a schematic view showing the structure of the door at the time of opening at 88 degrees in the application process of the present invention.

 detailed description

 The structure of the present invention will be further described below in conjunction with the drawings and preferred embodiments of the invention.

 Referring to Figures 1 through 8, the present invention is mainly composed of two parts, a first hinge arm 1 and a second hinge arm 2. First hinge arm 1 Also known as a horizontal hinge arm, which is mounted on the body 5 of the device when applied, the most commonly used device is an electric oven; the second hinge arm 2 is mounted on the door 4 to form a movable connection between the door and the device, the second hinge arm 2 When the door 4 of the device is opened and the angle changes synchronously, as shown in Fig. 5, the door 4 of the device is closed, that is, the angle between the first hinge arm 1 and the second hinge arm 2 is 90. Degree of state; the best effect that the present invention requires is: as shown in Figure 4, the first hinge arm 1 and the second hinge arm 2 can reach an angle of 87 degrees before the installation of the present invention, the door 4 In the closed state, it can be tightly closed by pre-pressure, which can achieve a reliable seal. As shown in Figure 6, the door 4 opening process does not exceed 15 degrees, that is, the angle between the first hinge arm 1 and the second hinge arm 2 does not exceed At 105 degrees, when the door 4 loses its external force, the door 4 will automatically return to the closed state; when the door 4 is opened more than 15 degrees and does not exceed 30 degrees, the door 4 can automatically return to the 15 The position stops at the ° position; as shown in Fig. 7 and Fig. 8, the door 4 is continuously opened by the external force, and the door 4 can be stopped at any position within the range within the angle range of the opening angle of 30 to 88 °.

 The first hinge arm 1 includes a strip housing 10, and the strip housing 10 is a U-shaped slot structure, and the strip housing 10 The slot is provided with a spring push rod 11 , a compression spring 12 , a lever 13 , a connecting arm 14 and a linkage lever 15 . The front end of the strip housing 10 and the rear end of the second hinge arm 2 pass through the hinge shaft 3 The movable joint, the second hinge arm 2 is rotatable about the hinge shaft 3; in order to reduce the friction between the hinge shaft 3 and the connecting hole on the second hinge arm 2, the hinge shaft 3 is sleeved with a sleeve 31 and a second hinge Arm 2 Movable connection, bushing 31 The middle section is knurled and can be firmly coupled to the second hinge arm 2. The compression spring 12 is fitted over the spring push rod 11 and the spring push rod 11 and the linkage rod 15 are in the strip housing The slots of 10 are arranged side by side, and the spring push rod 11 is disposed above the linkage rod 15; the lever 13 is disposed at the tail of the strip housing 10, and is movably connected to the strip housing 10 through the fulcrum pin 131; A connecting arm 14 is disposed between the upper end of the spring push-pull rod 11 and the rear end of the spring push-pull rod 11, and the tail end of the connecting arm 14 is movably connected to the upper end of the lever 13 through the first pin shaft 141, and the connecting arm 14 The front end is movably connected to the rear end of the spring push rod 11 through the second pin 142; the connecting arm 14 is provided with a buffer groove 143 which cooperates with the second pin 142; and the linkage rod 15 is connected to the lever 13 Between the second hinge arm 2 and the second hinge arm 2, the rear end of the linkage rod 15 is movably connected to the lower end of the lever 13 via the third pin shaft 151, and the front end of the linkage rod 15 passes through the fourth pin shaft 152 and the second hinge arm 2 The movable connection; in order to reduce the friction between the fourth pin 152 and the connecting hole on the second hinge arm 2, the fourth pin 152 is sleeved with an oil-free bearing 1521 and the second hinge arm 2 Active connection.

 In order to compress the spring 12, the spring push-pull rod 11 can be elastically biased forward (horizontal right direction in Fig. 3) in the strip housing 10 The bottom has a spring retainer 16 bent at a 90 degree angle. The spring retainer 16 has a U-shaped groove 161 for the spring push-pull rod 11 to be inserted in the middle. The spring push-pull rod 11 can be in the U-shaped groove. In the 161 sliding and small angle range swing, the spring push-pull rod 11 has a U-shaped branching fork 111 at the front end, and the compression spring 12 of the spring push-pull rod 11 is placed at the front and the rear ends respectively. The glyph 111 and the spring guard 16 are attached. U-shaped fork 111 is connected to a roller 113 via a roller pin 112, and both ends of the roller pin 112 extend in the strip housing 10 In the two side walls, a strip-shaped limiting slot 101 is formed on the two side walls of the strip-shaped housing 10, and the length and position of the strip-shaped limiting slot 101 and the buffering slot 143 determine the roller pin. axis 112 Move the distance horizontally. The horizontal movement distance of the roller pin 112 determines the maximum and minimum achievable angle between the second hinge arm 2 and the first hinge arm 1, and the maximum angle that can be achieved in this embodiment is 178. Degree, the minimum angle is 87 degrees.

 On the rear side of the second hinge arm 2 on the rear side of the hinge shaft 3 (on the left side of the hinge shaft 3 in Fig. 3), a cam block that cooperates with the roller 113 is provided. 21, the cam block 21 includes a concave position 212, a convex position 211 and a cam surface 213. The cam block 21 functions mainly with the roller 113 Cooperating, when the hinge is not installed (as shown in Fig. 4), the roller 113 is pressed tightly against the concave position of the cam block 21 under the action of the compression spring 12 when the external force is not applied. There is no sway to ensure that the hinge has a closing force when mounted on the door, and the second hinge arm 2 is at an angle of less than 90 degrees with the first hinge arm 1, preferably at an angle of 87 degrees. When the second hinge arm 2 and the door 4 Installation, when the door 4 is in the closed position, the first hinge arm 1 is at an angle of 90 degrees to the second hinge arm 2 (Fig. 5), and the door 4 is mounted on the second hinge arm 2 The force generated by the center of gravity is the torque generated by the hinge shaft 3 and the force of the compression spring 12 through the spring push rod 11 and the roller 113 to the second hinge arm 2 to the hinge shaft 3 Cooperating with the torque generated by the fulcrum, the device body 5, that is, the oven frame, is pressed to generate a closing force to achieve a tight seal;

 When the hinge of the present invention is mounted on the door 4, during the opening process, when the opening of the door 4 does not exceed 5 degrees, that is, the first hinge arm 1 When the angle between the second hinge arm 2 and the second hinge arm 2 is less than 95 degrees, the door 4 will automatically return to the closed state (the state shown in Fig. 5) when the external force is lost, and the sealing property when the door 4 is closed;

 When the roller 113 is at the convex position 211 of the cam block 21, the position of the door 4 is a force change position (the opening angle of the door is 95). Around the degree), the force to open the door 4 before the convex position 211 is increased from small to large, and is the largest at the convex position 211, and becomes smaller when the convex position 211 reaches the cam surface 213; the roller 113 is on the cam surface 213 Position, when the door 4 loses external force, the door 4 automatically returns to the opening under the action of the compression spring 12, the roller 113, the cam block 21 and the center of gravity of the door 4 15 ± 3 The position of the degree is preferably 15 degrees (the angle between the first hinge arm 1 and the second hinge arm 2 is 105 degrees), that is, the observation hole position; the angle range roller 113 and the cam block 21 are always in contact, the cam block 21 The force of the pair of rollers 113 varies with the shape of the cam block 21, and the force applied to the door 4 is compressed by the cam block 21 cam surface 213 to compress the roller 113 to compress the spring 12 Realized. The roller 113 slides in the buffer groove 143 when the elastic force of the compression spring 12 and the cam block act to roll along the cam surface. When door 4 is opened more than 30 degrees less than 88 When the angle is as shown in Fig. 7 and Fig. 8, that is, when the angle between the first hinge arm 1 and the second hinge arm 2 is greater than 120 degrees and less than or equal to 178 degrees, the door 4 It can be stopped and held at any position within the range. The principle is that the door 4 mounted on the second hinge arm 2 has a center of gravity force generated by the hinge shaft 3 as a fulcrum and the linkage rod 15 is compressed by the spring 12 The elastic tension is balanced by the torque generated by the hinge shaft 3 as a fulcrum. The door opening angle is in the range of 30 to 88 degrees, and the roller 113 is disengaged from the cam block 21 (the spring push rod 11 at this time) Under the action of the compression spring 12, at the end of the buffer groove 143 of the connecting arm 14, the force acting on the door 4 is changed by the linkage lever 15 with the opening angle of the door through the lever 13, and the connecting arm 14 The spring push-pull rod 11 realizes the compression of the compression spring 12, and the larger the opening angle of the door 4 is, the larger the compression amount of the compression spring 12 is, the larger the generated torque is, and the generated torque and the door 4 The torque generated by gravity is matched within the range of the door opening angle of 30 to 88 degrees, and the door 4 can be stopped at any position within this range.

Claims (9)

1. An intelligent structure elastic hinge comprising a first hinge arm (1) and a second hinge arm (2); the first hinge arm (1) comprises a strip housing (10), a strip shell The front end of the body (10) and the rear end of the second hinge arm (2) are movably connected by a hinge shaft (3); a spring push rod (11) is arranged in the strip housing (10), and the spring push rod (11) The upper set has a compression spring (12);

   The utility model is characterized in that: a lever (13) is arranged in the tail of the strip-shaped casing (10), and the lever (13) is movably connected to the strip-shaped casing (10) through the fulcrum pin (131); the lever (13) A connecting arm (14) is disposed between the upper end and the tail end of the spring push-pull rod (11), and the tail end of the connecting arm (14) is movably connected to the upper end of the lever (13) through the first pin shaft (141), and the connecting arm The front end of (14) is movably connected to the tail end of the spring push-pull rod (11) through the second pin shaft (142); a linkage rod is provided between the lower end of the lever (13) and the second hinge arm (2) (15) The rear end of the linkage rod (15) is movably connected to the lower end of the lever (13) through the third pin shaft (151), and the front end of the linkage rod (15) is moved by the fourth pin shaft (152) and the second hinge arm (2) Connection; at the bottom of the strip housing (10) is a spring block (16) bent at 90 degrees, and a spring-shaped block (16) is provided with a U-shaped groove for the spring push-pull rod (11) to be snapped in (161). ), the front end of the spring push-pull rod (11) extends with a U-shaped bifurcation (111), and the compression bomb fitted on the spring push-pull rod (11) The first and second ends of (12) are respectively placed on the U-shaped bifurcation (111) of the spring push-pull rod (11) and the spring flap (16) of the strip-shaped housing (10); the U-shaped bifurcation (111) passes through A roller (113) is coupled to the roller pin (112), and both ends of the roller pin (112) extend in the two side walls of the strip housing (10) on both side walls of the strip housing (10) A strip-shaped limiting groove (101) is provided to cooperate with the roller pin (112), and a cam block that cooperates with the roller (113) is disposed on the rear side of the second hinge arm (2) on the hinge shaft (3) ( twenty one), The cam block (21) includes a concave position (212), a convex position (211) and a cam surface (213);

   When the hinge is not installed, when the external force is not applied, the roller (113) stops in the concave position of the cam block under the action of the spring force and the cam block (21) (212) Inside, and the force card does not sway in this position, the first hinge arm (1) and the second hinge arm (2) are at an angle of less than 90 degrees;

   When the hinge is mounted on the door and the door is in the closed position, the first hinge arm (1) is at an angle of 90 degrees to the second hinge arm (2), and the door is centered on the second hinge arm (2) The generated force is the torque generated by the hinge shaft (3) as a fulcrum and the force of the compression spring (12) on the second hinge arm (2) through the spring push rod (11) and the roller (113) to the hinge shaft (3) ) abutting the oven frame under the combined action of the torque generated by the fulcrum;

   As the opening angle of the door becomes larger, the angle between the first hinge arm (1) and the second hinge arm (2) is also increased by the force, and the roller (113) does not cross the convex position of the cam block (21) ( 211) Before the door (4) mounted on the second hinge arm (2) loses the external force, the door (4) automatically returns to the action of the compression spring (12), the roller (113) and the cam block (21). Close position

   When the roller (113) is at the convex position (211) of the cam block (21), the position where the door (4) is located is a force change position, and the force for opening the door (4) before the convex position (211) is changed from small to small. Large, the largest at the convex position (211), reaching the cam surface beyond the convex position (211) ( 213) The time becomes small; the roller (113) is on the cam surface (213 When the position door (4) loses external force, the door (4) automatically returns to the opening 15 under the action of the compression spring (12), the roller (113), the cam block (21) and the force generated by the center of gravity of the door (4). ±3 degrees position;

   When the angle between the first hinge arm (1) and the second hinge arm (2) continues to expand with the opening of the door, the roller (113) is disengaged from the cam surface of the cam block (21) (213 After that, the force generated by the center of gravity of the door (4) mounted on the second hinge arm (2) is the torque generated by the hinge shaft (3) as a fulcrum and the elastic tension of the compression rod (12) of the linkage rod (15). The torque generated by the hinge shaft (3) as a fulcrum is in equilibrium.
2. The elastic hinge of the intelligent structure according to claim 1, wherein when the convex position (211) on the cam block (21) corresponds to the roller (113), the second hinge arm (2) and The first hinge arm (1) is at an angle of 95 degrees.
3. The elastic hinge of the intelligent structure according to claim 1, characterized in that: the center of gravity force of the door mounted on the second hinge arm (2) is a torque and a linkage rod generated by the hinge shaft (3) as a fulcrum ( 15) When the torque generated by the compression spring (12) is balanced by the hinge shaft (3), the angle between the second hinge arm (2) and the first hinge arm (1) is 120. ~178 degrees.
4. The elastic hinge of the intelligent structure according to claim 1, characterized in that the second hinge arm (2) has a minimum angle of 87 degrees with the first hinge arm (1).
5. The elastic hinge of the intelligent structure according to claim 1, characterized in that the tail end of the spring push-pull rod (11) or the connecting arm (14) is provided with the second pin shaft (142). Buffer tank (143).
6. The elastic hinge of the intelligent structure according to claim 5, wherein the strip-shaped limiting groove (101) and the buffering groove (143) limit the second hinge arm (2) and the first hinge arm ( 1) The maximum angle is 178 degrees.
7. The elastic hinge of the intelligent structure according to claim 1, characterized in that: the fourth hinge arm (2) is hinged to the linkage lever (15) by the fourth pin (152), in the second An oil-free bearing (1521) is installed in the hole of the hinge arm (2).
8. The elastic hinge of the intelligent structure according to claim 1, characterized in that: the hinge shaft (3) hinges the first hinge arm (1) and the second hinge arm (2) before, in the second A bushing (31) is mounted in the hole of the hinge arm (2).
9. The elastic hinge of the intelligent structure according to claim 1, characterized in that the strip-shaped housing (10) of the first hinge arm (1) is a U-shaped groove structure.

Images