CN217841249U - Hinge structure and block terminal - Google Patents

Abstract

The utility model relates to the technical field of distribution box covers, in particular to a hinge structure, which is used for matching a first movable bracket of a movable bracket structure fixedly connected with a door frame part with a fixed bracket fixedly connected with the door frame part through a group of damping structures; the fixed support and the first movable support are also matched through a guide limiting structure, the guide limiting structure comprises a boss and a track groove which are matched for use, the boss and the track groove are respectively arranged on the fixed support and the first movable support, and the boss is inserted in the track groove in a sliding manner; when the door part is opened to the maximum opening angle relative to the door frame part, the lug boss is in limit fit with the track groove to prevent the door part from being continuously opened relative to the door frame part; the hinge structure is simple in structure, and the guide limiting structure of the hinge structure can effectively limit the opening angle of the first movable support relative to the fixed support. The utility model discloses still relate to one kind and include hinge structure's block terminal, hinge structure have restricted the biggest angle of opening of face lid door.

Description

Hinge structure and block terminal

Technical Field

The utility model relates to a block terminal face lid technical field, concretely relates to hinge structure and one include hinge structure's block terminal.

Background

In the existing distribution box, a surface cover structure of the distribution box mostly comprises a surface cover and a surface cover door, and when components in the distribution box are operated, the surface cover door needs to be opened leftwards or rightwards; if open under the great condition of dynamics, owing to do not have damping and reliable stop device, the face lid door is the upset fast under the inertial action and is strikeed wall or other hard things, can cause the damage to the face lid door, and the face lid door kick-backs moreover and also can injure operating personnel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a hinge structure, its simple structure, its direction limit structure can effectively restrict the opening angle of first movable support for the fixed bolster. The utility model also provides an include hinge structure's block terminal, its hinge structure has restricted the biggest opening angle of face lid door.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hinge structure comprises a fixed support fixedly connected with a door frame part, a movable support structure fixedly connected with the door frame part and a damping structure, wherein the movable support structure comprises a first movable support which is matched with the fixed support through a group of damping structures; the fixed support and the first movable support are also matched through a guide limiting structure, the guide limiting structure comprises a boss and a track groove which are matched for use, one boss is arranged on the fixed support, the other boss is arranged on the first movable support, and the boss is inserted into the track groove in a sliding manner; the boss is in stop-fit engagement with the track groove to prevent continued opening of the door portion relative to the frame portion when the door portion is opened to a maximum opening angle relative to the frame portion.

Preferably, the damping structure includes damping bush and pivot, and the fixed bolster includes the fixed bolster jack, and the damping bush plants in the fixed bolster jack rather than interference fit, and the damping bush is including setting up the bush jack at its middle part, and the pivot both ends are pivot cooperation end and pivot link end respectively, and the pivot cooperation end plants in the bush jack and rather than damping normal running fit, and the pivot link end links to each other rather than spacing cooperation with first movable support, and first movable support and pivot revolve the axis synchronous rotation of axle.

Preferably, the boss is a fixed support boss arranged on the fixed support, the track groove is a first movable support track groove arranged on the first movable support, and the first movable support track groove is an arc-shaped groove with one open end.

Preferably, the maximum opening angle of the door portion relative to the frame portion is 135 °.

Preferably, the first movable support comprises a first movable support jack, the first movable support jack comprises a jack first section and a jack second section which are sequentially connected, the jack second section is close to the fixed support relative to the jack first section, the jack second section is a polygonal hole, the jack first section is a circular hole, and a jack table top is formed at the joint of the jack second section and the jack first section; the rotating shaft connecting end comprises a rotating shaft limiting section and a rotating shaft extending section which are sequentially connected, the rotating shaft limiting section is a polygonal column which is in limiting fit with the second section of the jack, the rotating shaft limiting section is in limiting fit with the table surface of the jack, and the rotating shaft extending section is a cylinder and is inserted into the first section of the jack.

Preferably, the rotating shaft connecting end further comprises a rotating shaft tail section, the rotating shaft limiting section, the rotating shaft extending section and the rotating shaft tail section are sequentially connected, and the rotating shaft tail section protrudes out of the free end of the first section of the jack; after the rotating shaft and the first movable support are installed, the tail section of the rotating shaft is flattened to be in limit fit with the first movable support, and the connecting end of the rotating shaft is prevented from being separated from the first movable support jack.

Preferably, the fixed support further comprises a fixed support counter bore arranged at the end part of the fixed support jack, and the inner diameter of the fixed support counter bore is larger than that of the fixed support jack; the damping bushing comprises a bushing main body and a bushing end, and the outer diameter of the bushing end is larger than that of the bushing main body; the bushing main body is inserted into the fixed support jack and in interference fit with the fixed support jack, the bushing end is inserted into the fixed support counter bore, and the free end of the bushing end protrudes out of the fixed support counter bore and is in butt fit with the first movable support.

Preferably, the free end of the bushing tip protrudes out of the counter bore of the fixing bracket by 0.2mm.

Preferably, a plurality of strip-shaped bulges are uniformly distributed on the outer side wall of the bushing main body along the axial direction of the bushing main body, and the strip-shaped bulges extend along the axial direction of the damping bushing.

Preferably, a bush chamfering structure is arranged at the outer edge of the free end of the bush main body;

the one end that supplies pivot cooperation end male of bush jack is equipped with bush jack chamfer structure, and the free end of pivot cooperation end is equipped with cooperation end chamfer structure.

Preferably, the fixed bolster is the C shape structure, and its C shape structure's one end is equipped with the fixed bolster jack, and the other end is for being used for the fixed bolster stiff end with door frame part fixed connection, and the fixed bolster boss setting just is located between fixed bolster jack and the fixed bolster stiff end on the lateral wall of fixed bolster towards first movable support.

Preferably, the first movable support comprises a first movable support fixing part and a first movable support matching part, the first movable support fixing part and the first movable support matching part are fixedly connected with the door part and are bent to be connected, and the first movable support matching part is provided with a first movable support rail groove and a first movable support jack.

Preferably, the hinge structure further comprises a second movable support, the second movable support and the first movable support are mirror-image structures, and the second movable support is matched with the fixed support through a group of damping structures.

A distribution box comprises a surface cover door, a surface cover and a box body buckled with the surface cover; the face cover door is a door part, the face cover is a door frame part, and the face cover door is connected with the face cover through the at least one hinge structure.

Preferably, the door frame part comprises a door frame connecting structure arranged on the door frame part, the door frame connecting structure comprises a door frame connecting hole used for installing a fixing support of the hinge structure, the door frame connecting structure further comprises a door frame reinforcing rib, and the door frame reinforcing rib is arranged around the door frame connecting hole;

the door part comprises a door connecting structure, the door connecting structure comprises a first door connecting structure, the first door connecting structure comprises a first door connecting hole used for installing a first movable support of the hinge structure, the first door connecting structure further comprises a first door reinforcing rib, the first door reinforcing rib is of a grid structure, and the first movable support connecting hole is located at the cross-shaped intersection of the grid structure.

Preferably, the door part is matched with the door frame part through a press type lock catch, and the door part is locked and unlocked with the door frame part through pressing; a rotating allowance is arranged between the rotating shaft and the first movable support, so that when the door part is pressed to unlock and lock, the door part drives the first movable support to rotate relative to the rotating shaft.

The utility model discloses hinge structure, its simple structure, damping structure avoids the too big door structure resilience that leads to of power to hurt operating personnel when operating personnel opens the door part at one time, and in the swing stroke of movable support structure, can realize the stop of optional position, convenience of customers' operation; the guide limiting structure can effectively limit the opening angle of the first movable support relative to the fixed support, and when the guide limiting structure is applied to a door structure, the maximum opening angle of the door part relative to the door frame part can be limited, so that the door structure is prevented from being damaged when being impacted on a wall.

The utility model discloses a distribution box, which connects the face cover door and the face cover through a hinge structure to avoid rebounding to hurt operators; and the hinge structure limits the maximum opening angle of the face cover door, and the face cover door is prevented from being impacted and damaged due to overlarge opening angle.

Drawings

FIG. 1 is a schematic structural view of the door structure of the present invention;

FIG. 2 is a schematic structural view of the door structure and door frame structure in an open position according to the present invention;

fig. 2a is an enlarged schematic view of a portion a of fig. 2 according to the present invention;

fig. 2B is an enlarged schematic view of the portion B of fig. 2 according to the present invention;

fig. 3 is a schematic structural view of the door frame structure of the present invention;

fig. 4 is an enlarged schematic view of a portion C of fig. 3 according to the present invention;

FIG. 5 is a schematic view of the door structure of the present invention;

fig. 6 is an enlarged schematic view of a portion D of fig. 5 according to the present invention;

fig. 7 is a schematic structural view of the hinge structure of the present invention;

fig. 8 is a schematic structural view of the fixing bracket of the present invention;

fig. 9 is a schematic structural view of a first movable bracket of the present invention;

fig. 10 is a schematic structural view of a second movable bracket of the present invention;

fig. 11a is a schematic structural view of the damping bushing of the present invention at a viewing angle;

fig. 11b is a schematic view of the damping bushing of the present invention from another perspective;

fig. 12 is a schematic structural view of the rotating shaft of the present invention.

Detailed Description

The following description will further describe a specific embodiment of the hinge structure of the present invention with reference to the embodiments shown in fig. 1 to 12. The hinge structure of the present invention is not limited to the description of the following embodiments.

As shown in fig. 7-12, the hinge structure h of the present invention comprises a fixed bracket 3 for being fixedly connected to the door frame portion 1, a movable bracket structure for being fixedly connected to the door portion 2, and a damping structure, wherein the movable bracket structure comprises a first movable bracket 4, and the first movable bracket 4 is matched with the fixed bracket 3 through a set of damping structures; the fixed support 3 and the first movable support 4 are also matched through a guide limiting structure, the guide limiting structure comprises a boss and a track groove which are matched for use, one boss is arranged on the fixed support 3, the other boss is arranged on the first movable support 4, and the boss is inserted into the track groove in a sliding manner; when the door part 2 is opened to a maximum opening angle relative to the door frame part, the boss is in limit fit with the track groove to prevent the door part 2 from being opened further relative to the door frame part 1.

The hinge structure of the utility model has simple structure, the damping structure can avoid the rebounding or the bumping of the door structure caused by overlarge force when the operator opens the door part, and the stop of any position can be realized in the swing stroke of the movable bracket structure, thereby being convenient for the operation of the user; the guide limiting structure can effectively limit the opening angle of the first movable support relative to the fixed support, and when the guide limiting structure is applied to a door structure, the maximum opening angle of the door part relative to the door frame part can be limited, so that the door structure is prevented from being damaged when being impacted on a wall.

It should be noted that the door frame portion 1 and the door portion 2 are not limited to a narrow door and a door frame, the door frame portion 1 is a fixedly installed structure portion, and the door portion 2 is a structure which is connected to the door frame portion 1 by a hinge structure and can be rotated to be opened or closed with respect to the door frame portion 1. The fixed bracket 3 is detachably connected with the door frame part 1 or is of an integrated structure; the movable support structure is detachably connected with the door part 2 or is of an integrated structure.

As shown in fig. 7-12, one implementation of the damping structure is:

the damping structure comprises a damping bush 6 and a rotating shaft 7, the fixed support 3 comprises fixed support jacks 3-20, the damping bush 6 is inserted into the fixed support jacks 3-20 and in interference fit with the fixed support jacks 3-20, the damping bush 6 comprises a bush jack 6-00 arranged in the middle of the damping bush 6, two ends of the rotating shaft 7 are respectively a rotating shaft matching end and a rotating shaft connecting end, the rotating shaft matching end is inserted into the bush jack 6-00 and in damping rotation fit with the bush jack, the rotating shaft connecting end is connected with the first movable support 4 and in limiting fit with the first movable support 4, and the first movable support 4 and the rotating shaft 7 rotate synchronously around the axis of the rotating shaft 7.

The term "damped rotational fit" means that the shaft 7 is inserted into the bushing receptacle 6-00 of the damping bushing 6, the shaft 7 and the inner sidewall of the bushing receptacle 6-00 are in a clearance-free fit, and a certain pressure exists between the shaft 7 and the inner sidewall of the bushing receptacle 6-00 to generate damping when the shaft 7 rotates relative to the damping bushing 6.

As shown in fig. 7 and 10, the movable support structure further includes a second movable support 5, the second movable support 5 and the first movable support 4 are respectively disposed at two sides of the fixed support 3, and the second movable support 5 is also matched with the fixed support 3 through a set of damping structures; in the two groups of damping structures, the damping structure matched with the first movable support 4 is a first damping structure, and the damping structure matched with the second movable support 5 is a second damping structure; the damping bushes 6 of the two groups of damping structures are respectively inserted at two ends of the jacks 3-20 of the fixed support, the rotating shaft matching end of the rotating shaft 7 of the second damping structure is inserted in the corresponding damping bush 6, the rotating shaft connecting end of the rotating shaft 7 is connected with the second movable support 5 to be in limit fit with the second movable support, and the second movable support 5 and the rotating shaft 7 synchronously rotate around the axis of the second movable support. The fixed support 3, the first movable support 4 and the second movable support 5 are connected together through the damping bush 6 and the rotating shaft 7, the damping bush 6 is pressed tightly to generate friction force, and therefore a damping effect is generated in the rotating process, and the door part 2 can stay at any position in the opening process.

In the hinge mechanism of the invention, the second movable bracket 5 and the first movable bracket 4 are mirror images.

Preferably, the fixed support 3, the first movable support 4 and the second movable support 5 are all supported by metal. Further, the fixed support 3, the first movable support 4 and the second movable support 5 are respectively a fixed zinc alloy support, a first movable zinc alloy support and a second movable zinc alloy support.

Preferably, the damping bush 6 is a POM damping bush, and is formed by processing and molding through a mold.

Preferably, the rotating shaft 7 is an SUS304 rotating shaft.

The specific structures of the fixed bracket 3 and the damping structure will be described in detail below, and the specific structures of the first movable bracket 4 and the second movable bracket 5, and the matching relationship between the first movable bracket 4 and the second movable bracket 5 and the fixed bracket 3 and the damping structure will be described by taking the first movable bracket 4 as an example.

The maximum opening angle of the door part 2 relative to the door frame part 1 is preferably 135 °.

As shown in fig. 8-9, in the hinge structure of the present invention, the boss is a fixed bracket boss 3-3 disposed on the fixed bracket 3, the track groove is a first movable bracket track groove 4-2 disposed on the first movable bracket 4, and the first movable bracket track groove 4-2 is an arc-shaped groove with an opening at one end.

As shown in fig. 9, the first movable support 4 includes a first movable support jack, the first movable support jack includes a jack first section 4-40 and a jack second section 4-41 which are connected in sequence, the jack second section 4-41 is close to the fixed support 3 relative to the jack first section 4-40, the jack second section 4-41 is a polygonal hole, the jack first section 4-40 is a circular hole, and a jack table is formed at a connection position of the jack second section 4-41 and the jack first section 4-40; as shown in fig. 12, the rotating shaft connecting end of the rotating shaft 7 includes a rotating shaft limiting section 7-2 and a rotating shaft extending section 7-3 connected in sequence, the rotating shaft limiting section 7-2 is a polygonal column in limiting fit with the second section 4-41 of the jack, the rotating shaft limiting section 7-2 is in limiting fit with the table surface of the jack, and the rotating shaft extending section 7-3 is a cylinder and is inserted into the first section 4-40 of the jack. Further, the second section 4-41 of the jack is a regular polygon hole, and the second section 4-41 of the jack is arranged coaxially with the first section 4-40 of the jack.

As shown in fig. 7-12, the rotating shaft connecting end further includes a rotating shaft tail section 7-4, the rotating shaft limiting section 7-2, the rotating shaft extension section 7-3 and the rotating shaft tail section 7-4 are connected in sequence, and the rotating shaft tail section 7-4 protrudes out of the free end of the first section 4-40 of the jack; after the rotating shaft 7 and the first movable support 4 are installed, the tail section 7-4 of the rotating shaft is flattened to be in limit fit with the first movable support 4, and the connecting end of the rotating shaft is prevented from being separated from the first movable support jack.

As shown in fig. 8, the fixing support 3 further comprises fixing support counter bores 3-21 arranged at the end portions of the fixing support insertion holes 3-20, and the inner diameters of the fixing support counter bores 3-21 are larger than the inner diameters of the fixing support insertion holes 3-20; as shown in FIGS. 11a-11b, the dampening shoe 6 includes a shoe body 6-0 and a shoe tip 6-2, the outer diameter of the shoe tip 6-2 being greater than the outer diameter of the shoe body 6-0; the bushing main body 6-0 is inserted into the fixed support jack 3-20 to be in interference fit with the fixed support jack, the bushing end 6-2 is inserted into the fixed support counterbore 3-21, and the free end of the bushing end 6-2 protrudes out of the fixed support counterbore 3-21 and is in butt fit with the first movable support 4, so that the fixed support 3 is prevented from being in direct contact with the first movable support 4, and friction force and abrasion between the fixed support 3 and the first movable support 4 are reduced. Further, the free end of the bushing tip 6-2 protrudes 0.2mm outside the fixed support counter bore 3-21.

As shown in FIGS. 11a-11b, a plurality of strip-shaped protrusions 6-3 are uniformly distributed on the outer side wall of the bushing main body 6-0 along the circumferential direction thereof, and the strip-shaped protrusions 6-3 extend along the axial direction of the damping bushing 6. Furthermore, the cross section of the strip-shaped bulge 6-3 is an arc-shaped bulge.

As shown in FIGS. 11a-11b, the free end of the bushing main body 6-0 is provided with a chamfer structure 6-1 at the outer edge thereof to facilitate the insertion of the bushing main body 6-0 into the insertion hole 3-20 of the fixing bracket.

As shown in fig. 11b, a bush socket chamfered structure 6-4 is provided at the end of the bush socket 6-00 for inserting the rotating shaft mating end, and a mating end chamfered structure 7-1 is provided at the free end of the rotating shaft mating end, so that the rotating shaft mating end of the rotating shaft 7 can be conveniently inserted into the bush socket 6-00.

As shown in fig. 8, an embodiment of the fixing bracket 3 is: the fixed support 3 is of a C-shaped structure, one end of the C-shaped structure is provided with fixed support jacks 3-20, the other end of the C-shaped structure is a fixed support fixed end fixedly connected with the door frame part 1, and fixed support bosses 3-3 are arranged on the side wall, facing the first movable support 4, of the fixed support 3 and are located between the fixed support jacks 3-20 and the fixed support fixed end. Furthermore, two fixing support connecting holes 3-1 are arranged at intervals at the fixing end of the fixing support, and the end face of the fixing end of the fixing support is a fixing end face 3-00 and is abutted to the doorframe structure 1.

Of course, a fixed bracket boss 3-3 is also provided on the side wall of the fixed bracket 3 facing the second movable bracket 5.

As shown in fig. 9, an embodiment of the first movable bracket 4 is: the first movable support 4 comprises a first movable support fixing part 4-00 and a first movable support matching part 4-01 which are fixedly connected with the door part 2, the first movable support fixing part 4-00 and the first movable support matching part 4-01 are connected in a bending mode, and the first movable support matching part 4-01 is provided with a first movable support rail groove 4-2 and a first movable support jack. Furthermore, two first movable support connecting holes 4-3 are arranged at the first movable support fixing part 4-00 at intervals.

As shown in fig. 10, an embodiment of the second movable bracket 5 is shown, and the structure thereof and the first movable bracket 4 are mirror images of each other, and will not be described herein.

As shown in fig. 1-6, the present invention also discloses a door structure, which comprises a door frame part 1, a door part 2 and a hinge structure h, wherein the door part 2 is connected with the door frame part 1 through at least one hinge structure h. Further, as shown in fig. 2, in the door structure of the present invention, the door portion 2 is connected to the door frame portion 1 through two hinge structures h disposed at an interval.

Specifically, as shown in fig. 1-2, the utility model discloses in the distribution box was applied to the door structure, door part 2 was the face lid door of distribution box, and door frame part 1 was the face lid of distribution box, and the distribution box still includes the box together with the face lid lock, and the face lid door links to each other with the face lid through at least one hinge structure h.

As shown in fig. 3-4, the door frame portion 1 further includes a door frame connecting structure 1-0 disposed thereon, and the door frame connecting structure 1-0 includes a door frame connecting hole 1-1 for mounting a hinge structure, which is correspondingly engaged with a fixing bracket connecting hole 3-1 of the fixing bracket 3. Further, as shown in fig. 4, the door frame connecting structure 1-0 further includes a door frame reinforcing rib 1-2, and the door frame reinforcing rib 1-2 is disposed around the door frame connecting hole 1-1.

As other embodiments, the door frame reinforcing rib 1-2 can also be of a grid structure, and the door frame connecting holes 1-1 are arranged at the cross-shaped intersection of the grid structure.

As shown in fig. 5 to 6, the door portion 2 further includes a door connecting structure, the door connecting structure includes a first door connecting structure 2-00, and the first door connecting structure 2-00 includes a first door connecting hole 2-1 for mounting the first movable bracket 4 of the hinge structure, and is correspondingly engaged with the first movable bracket connecting hole 4-3 of the first movable bracket 4. Further, as shown in fig. 6, the first door connecting structure 2-00 further includes a first door reinforcing rib 2-3, the first door reinforcing rib 2-3 is of a grid structure, and the first movable support connecting hole 4-3 is located at a cross of the grid structure.

As shown in fig. 5-6, the door connection structure further includes a second door connection structure 2-01, and the second door connection structures 2-01 are mirror image structures and are matched with the second movable bracket 5.

As shown in fig. 6, the door portion 2 further comprises a pair of door panels 2-2 which are oppositely arranged, a first movable support matching portion 4-01 of the first movable support 4, one end of the fixed support 3 provided with the fixed support insertion holes 3-20, and a second movable support matching portion of the second movable support 5 are sequentially arranged between the two door panels 2-2, and the two door panels 2-2 are respectively located at two sides of the first movable support matching portion 4-01 and the second movable support matching portion and are respectively in limit matching with the two. Specifically, as shown in fig. 6, the door portion 2 includes a door plate and a door side, the door side is vertically connected to one end of the door plate, the door connecting structure is disposed on the door plate, and the door table 2-2 is disposed on the door side.

As shown in fig. 1-2b, the door portion 2 is also engaged with the doorframe portion 1 by a press-type lock, and is locked and unlocked with the doorframe portion 1 by pressing the door portion 2; a rotation allowance is arranged between the rotating shaft 7 and the first movable support 4, so that when the door part 2 is pressed to be locked and unlocked with the door frame part 1, the door part 2 drives the first movable support 4 to rotate freely relative to the rotating shaft 7, namely, in the range of the rotation allowance, the door part 2 can drive the first movable support 4 to rotate in a preset angle relative to the rotating shaft 7, and the first movable support 4 cannot drive the rotating shaft 7 and the damping bushing 6 to rotate relatively to generate damping.

Specifically, as shown in fig. 1-2b, the press type spring lock catch includes a lock head 2-10 fixed on the door portion 2 and a lock seat 1-10 fixed on the door frame portion 1, the lock head 2-10 and the lock seat 1-10 are used in cooperation, the door portion 2 is further provided with a press mark 2P, and the press mark 2P is opposite to the lock head 2-10 and respectively located on two sides of the door portion 2; pressing the pressing mark 2P to enable the lock head 2-10 to be inserted into the lock seat 1-10 and locked with the lock seat 1-10, and simultaneously, the door part 2 drives the first movable support 4 to rotate relative to the rotating shaft 7; and pressing the pressing mark 2P again to unlock the lock head 2-10 from the lock seat 1-10, the lock head 2-10 is bounced off the lock seat 1-10, and the lock head 2-10 drives the door part 2 and the first movable bracket 4 to rotate relative to the rotating shaft 2.

It should be noted that the press-type spring locking notch can be realized by the prior art, and will not be described in detail herein.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (16)

1. A hinge structure characterized by: the hinge structure comprises a fixed support (3) fixedly connected with the door frame part (1), a movable support structure and a damping structure, wherein the movable support structure is fixedly connected with the door frame part (2), the movable support structure comprises a first movable support (4), and the first movable support (4) is matched with the fixed support (3) through a group of damping structures; the fixed support (3) is matched with the first movable support (4) through a guide limiting structure, the guide limiting structure comprises a boss and a track groove which are matched for use, one boss is arranged on the fixed support (3), the other boss is arranged on the first movable support (4), and the boss is inserted into the track groove in a sliding mode; when the door part (2) is opened to the maximum opening angle relative to the doorframe part (1), the lug boss is in limit fit with the track groove to prevent the door part (2) from being opened relative to the doorframe part (1) continuously.

2. The hinge structure according to claim 1, wherein: the damping structure comprises a damping bush (6) and a rotating shaft (7), the fixed support (3) comprises a fixed support jack (3-20), the damping bush (6) is inserted into the fixed support jack (3-20) and is in interference fit with the fixed support jack, the damping bush (6) comprises a bush jack (6-00) arranged in the middle of the fixed support jack, two ends of the rotating shaft (7) are respectively a rotating shaft matching end and a rotating shaft connecting end, the rotating shaft matching end is inserted into the bush jack (6-00) and is in damping rotation fit with the bush jack, the rotating shaft connecting end is connected with the first movable support (4) and is in limiting fit with the first movable support, and the first movable support (4) and the rotating shaft (7) synchronously rotate around the axis of the rotating shaft (7).

3. The hinge structure according to claim 1, wherein: the boss is a fixed support boss (3-3) arranged on the fixed support (3), the track groove is a first movable support track groove (4-2) arranged on the first movable support (4), and the first movable support track groove (4-2) is an arc-shaped groove with one open end.

4. The hinge structure according to claim 1, wherein: the maximum opening angle of the door part (2) relative to the door frame part (1) is 135 degrees.

5. The hinge structure according to claim 2, wherein: the first movable support (4) comprises a first movable support jack, the first movable support jack comprises a jack first section (4-40) and a jack second section (4-41) which are sequentially connected, the jack second section (4-41) is close to the fixed support (3) relative to the jack first section (4-40), the jack second section (4-41) is a polygonal hole, the jack first section (4-40) is a circular hole, and a jack table is formed at the joint of the jack second section (4-41) and the jack first section (4-40); the rotating shaft connecting end comprises a rotating shaft limiting section (7-2) and a rotating shaft extending section (7-3) which are sequentially connected, the rotating shaft limiting section (7-2) is a polygonal column in limiting fit with the second section (4-41) of the jack, the rotating shaft limiting section (7-2) is in limiting fit with the table surface of the jack, and the rotating shaft extending section (7-3) is a cylinder and is inserted into the first section (4-40) of the jack.

6. The hinge structure according to claim 5, wherein: the rotating shaft connecting end further comprises a rotating shaft tail section (7-4), the rotating shaft limiting section (7-2), the rotating shaft extending section (7-3) and the rotating shaft tail section (7-4) are sequentially connected, and the rotating shaft tail section (7-4) protrudes out of the free end of the jack first section (4-40); after the rotating shaft (7) and the first movable support (4) are installed, the tail section (7-4) of the rotating shaft is flattened to be in limit fit with the first movable support (4), and the connecting end of the rotating shaft is prevented from being separated from the first movable support jack.

7. The hinge structure according to claim 2, wherein: the fixing support (3) further comprises fixing support counter bores (3-21) arranged at the end parts of the fixing support insertion holes (3-20), and the inner diameters of the fixing support counter bores (3-21) are larger than the inner diameters of the fixing support insertion holes (3-20); the damping bushing (6) comprises a bushing main body (6-0) and a bushing end (6-2), and the outer diameter of the bushing end (6-2) is larger than that of the bushing main body (6-0); the bushing main body (6-0) is inserted into the fixed support insertion hole (3-20) to be in interference fit with the fixed support insertion hole, the bushing end head (6-2) is inserted into the fixed support counter bore (3-21), and the free end of the bushing end head (6-2) protrudes out of the fixed support counter bore (3-21) and is in butt fit with the first movable support (4).

8. The hinge structure according to claim 7, wherein: the height of the free end of the bushing end head (6-2) protruding out of the counter bore (3-21) of the fixing support is 0.2mm.

9. The hinge structure according to claim 7, wherein: a plurality of strip-shaped bulges (6-3) are uniformly distributed on the outer side wall of the bushing main body (6-0) along the axial direction of the bushing main body, and the strip-shaped bulges (6-3) extend along the axial direction of the damping bushing (6).

10. The hinge structure according to claim 7, wherein: a bush chamfering structure (6-1) is arranged at the outer edge of the free end of the bush main body (6-0);

and a bush jack chamfer structure (6-4) is arranged at one end of the bush jack (6-00) for the matching end of the rotating shaft to be inserted, and a matching end chamfer structure (7-1) is arranged at the free end of the matching end of the rotating shaft.

11. The hinge structure according to claim 3, wherein: the fixed support (3) is of a C-shaped structure, one end of the C-shaped structure is provided with a fixed support jack (3-20), the other end of the C-shaped structure is a fixed support fixed end fixedly connected with the door frame part (1), and a fixed support boss (3-3) is arranged on the side wall, facing the first movable support (4), of the fixed support (3) and is positioned between the fixed support jack (3-20) and the fixed support fixed end.

12. The hinge structure according to claim 3, wherein: the first movable support (4) comprises a first movable support fixing part (4-00) and a first movable support matching part (4-01), the first movable support fixing part (4-00) and the first movable support matching part (4-01) are fixedly connected with the door part (2) and are connected in a bending mode, and a first movable support rail groove (4-2) and a first movable support jack are formed in the first movable support matching part (4-01).

13. The hinge structure according to claim 1, wherein: the hinge structure further comprises a second movable support (5), the second movable support (5) and the first movable support (4) are of mirror image structures, and the second movable support (5) is matched with the fixed support (3) through a group of damping structures.

14. A distribution box comprises a surface cover door, a surface cover and a box body buckled with the surface cover; the method is characterized in that: the face cover door is a door part (2) and the face cover is a door frame part (1), the face cover door being connected to the face cover by means of at least one hinge construction according to any one of claims 1-13.

15. The electrical box of claim 14, wherein: the door frame part (1) comprises a door frame connecting structure (1-0) arranged on the door frame part, the door frame connecting structure (1-0) comprises a door frame connecting hole (1-1) used for installing a fixing support (3) of a hinge structure, the door frame connecting structure (1-0) further comprises a door frame reinforcing rib (1-2), and the door frame reinforcing rib (1-2) is arranged around the door frame connecting hole (1-1);

the door part (2) comprises a door connecting structure, the door connecting structure comprises a first door connecting structure (2-00), the first door connecting structure (2-00) comprises a first door connecting hole (2-1) used for installing a first movable support (4) of the hinge structure, the first door connecting structure (2-00) further comprises a first door reinforcing rib (2-3), the first door reinforcing rib (2-3) is of a grid structure, and the first movable support connecting hole (4-3) is located at the cross-shaped intersection of the grid structure.

16. The electrical box of claim 14, wherein: the door part (2) is also matched with the door frame part (1) through a press type lock catch, and the door part (2) is locked and unlocked with the door frame part (1) through pressing; the hinge structure comprises a rotating shaft (7), and a rotating allowance is arranged between the rotating shaft (7) and the first movable support (4), so that when the door part (2) is pressed to unlock and lock, the door part (2) drives the first movable support (4) to rotate relative to the rotating shaft (7).

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