CN114109168B - Split armrest hinge structure and assembly method thereof - Google Patents

Abstract

The invention relates to a split armrest hinge structure and an installation structure thereof, wherein the split armrest hinge structure comprises an armrest seat, an armrest body, a shielding piece and a first hinge shaft, a first hinge arm is arranged on the armrest seat, and the first hinge arm comprises a first vertical section and a first cantilever section; the position of the armrest body, which is close to the outer side, is provided with a first avoidance groove and an assembly groove positioned at the front side of the first avoidance groove, the rear side of the first avoidance groove is provided with a first hinging seat fixedly connected with the armrest body, and the assembly groove is internally provided with a second hinging seat fixedly connected with the armrest body; the first cantilever section extends into the first avoiding groove, and the first hinge shaft, the second hinge seat, the first cantilever section and the first hinge seat are hinged together; the shield covers the notch of the fitting groove. The assembling method of the split armrest hinge structure is used for assembling the split armrest hinge structure. The invention has the advantages of few parts, simple structure, low cost, high assembly precision, simple assembly, good shielding property, stable operation and high operation comfort level.

Description

Split armrest hinge structure and assembly method thereof

Technical Field

The invention relates to automobile parts, in particular to a split armrest hinge structure and an assembly method thereof.

Background

The central control box is an important assembly part on the passenger car, and plays roles of decoration, storage, human body protection, comfort for people and installation of electric elements. The center control box handrail on the center control box is favored by passengers in the vehicle for convenience and practicability. Along with the development of society, the use frequency of the armrest of the central control box is higher, the requirement on the armrest of the central control box is higher, the requirements on the smoothness and reliability of opening the armrest of the central control box are higher, and the requirements on the structure, the dimensional stability and the reliability and durability of the hinge of the armrest of the central control box are higher. As shown in fig. 14, the conventional split armrest hinge structure of the central control box is a split structure, and comprises a hinge mechanism 14, a central control box armrest 13 and an armrest seat 12, wherein the hinge mechanism 14 is connected to the armrest seat 12 through a fastening structure, the central control box armrest 13 is connected with the hinge mechanism 14, and the split armrest hinge structure of the central control box has the problems of multiple parts, long size, large accumulated error, poor hinge coaxiality, easy occurrence of clamping stagnation, high cost and easy occurrence of friction abnormal sound; in order to ensure the strength of the hinge mechanism, the hinge mechanism of the split type center control box split armrest hinge structure occupies more space, so that the storage box space is reduced, and meanwhile, the split type center control box split armrest hinge structure also has the problems of large gap and easy exposure.

Disclosure of Invention

The present invention is directed to a hinge structure for a split armrest and an assembling method thereof, so as to alleviate or eliminate at least one of the above-mentioned technical problems.

The invention discloses a split armrest hinge structure, which comprises an armrest seat, an armrest body, a shielding piece and a first hinge shaft, wherein the armrest seat comprises a seat body and a first hinge arm, the first hinge arm comprises a first vertical section with the lower end part fixedly connected with the seat body and a first cantilever section extending outwards from the upper end part of the first vertical section, and a first hinge hole is formed in the first cantilever section;

the novel handrail comprises a handrail body, and is characterized in that a first avoidance groove and an assembly groove positioned at the front side of the first avoidance groove are arranged at the position, close to the outer side, of the handrail body, the notch of the first avoidance groove and the notch of the assembly groove are downward, the assembly groove can provide an assembly space for a first hinge shaft, a first hinge seat fixedly connected with the handrail body is arranged at the rear side of the first avoidance groove, a second hinge seat fixedly connected with the handrail body is arranged in the assembly groove, a second hinge hole is formed in the first hinge seat, and a third hinge hole is formed in the second hinge seat;

the first cantilever section stretches into the first avoiding groove, and the first hinge shaft is matched with the third hinge hole, the first hinge hole and the second hinge hole so as to hinge the second hinge seat, the first cantilever section and the first hinge seat together;

the shielding member is connected with the armrest body through a detachable structure, and covers the notch of the assembly groove.

As an improvement, the first avoidance groove is provided with a first outer groove wall; when the armrest body is in a closed state, the first outer groove wall is positioned at the outer side of the armrest seat; when the armrest body is in an open state, the first outer groove wall is positioned at the lower side of the cantilever section, and the first outer groove wall is supported on the cantilever section upwards.

As an improvement, the handrail body is coated with a surface skin, and the surface skin is provided with a wrapping edge which covers the inner side surface of the first outer groove wall.

As an improvement, the handrail body includes epidermis, handrail upper cover plate, fixed connection are in apron and setting under the handrail of handrail upper cover plate downside are in the foaming layer of handrail upper cover plate upside, the outside edge of handrail upper cover plate is equipped with the upper cover plate lateral wall of buckling downwards, the upper cover plate lateral wall is located the outside of apron under the handrail, be equipped with first groove and step groove of dodging under the handrail on the position of apron outside, first dodging the groove with the upper cover plate lateral wall encloses into first dodging the groove, step groove with the upper cover plate lateral wall encloses into the assembly groove, the cover of borduring the medial surface of upper cover plate lateral wall.

As an improvement, still include the second hinge pin, be provided with the second articulated arm on the handrail seat, the second articulated arm include lower tip with the second vertical section of pedestal fixed connection and from the second cantilever section that the upper end of second vertical section extends to the outside, be equipped with the fourth hinge hole on the second cantilever section, be equipped with the second on the position that the handrail body leaned on the outside dodges the groove, the notch that the groove was dodged to the second sets up down, the second dodges the groove and is located the front side of mounting groove, the front side of second dodges the groove be equipped with handrail body fixed connection's third hinge seat, be equipped with in the mounting groove with handrail body fixed connection's fourth hinge seat, be equipped with the fifth hinge hole on the third hinge seat, be equipped with the sixth hinge hole on the fourth hinge seat, the mounting groove can be right the second hinge pin provides the assembly space, the second cantilever section stretches into in the second dodge the groove, the second hinge pin with sixth hinge hole, fourth hinge hole and fourth hinge seat are with the fourth hinge seat.

As an improvement, the first cantilever section is provided with a tubular part extending forwards into the assembly groove, the tubular part surrounds the periphery of the first hinge shaft, a torsion spring used for driving the armrest body to open is arranged in the assembly groove, the torsion spring body of the torsion spring is sleeved on the periphery of the tubular part, two torsion spring ends of the torsion spring are respectively connected to the first hinge arm and the armrest body, and the torsion spring is used for driving the armrest body to open.

As an improvement, a rotary damping piece is arranged in the assembly groove and comprises an inner layer piece and an outer layer piece which can rotate relatively, the inner layer piece is connected with the tubular part, and the outer layer piece is connected with the handrail body.

As an improvement, the inner layer piece suit is in on the first hinge axis, the rear end of inner layer piece is provided with two first spacing archs of backward protruding, two first spacing arch is at the circumference of inner layer piece interval setting, the front end of tubular part is equipped with two spacing grooves, two first spacing arch inlays respectively and installs in two in the spacing groove, be equipped with two spacing archs of second on the outer disc of outer layer piece, two spacing archs of second are in the circumference interval setting of outer layer piece, be equipped with the card in the assembly groove two spacing muscle between the spacing arch of second.

As an improvement, the rear side of the first cantilever section is provided with a first annular boss protruding backwards, the first annular boss is coaxially arranged with the first hinge hole, the rear groove wall of the first avoiding groove is provided with a second annular boss protruding forwards, and the second annular boss is coaxially arranged with the first annular boss.

The invention also provides an assembling method of the split armrest hinge structure, which is used for assembling the split armrest hinge structure and is characterized by comprising the following steps of:

s1, preparing an armrest seat, an armrest body, a shielding piece and a first hinge shaft;

s2, the first cantilever section stretches into the first avoidance groove to enable the armrest body to be in an open state;

s3, installing a first hinge shaft through an assembly slot, wherein the first hinge shaft sequentially stretches into the third hinge hole, the first hinge hole and the second hinge hole from front to back during assembly;

s4, assembling the shielding piece on the armrest body.

The invention improves the split armrest hinge structure, forms an integral hinge structure between the armrest seat and the armrest body, and has the advantages of less parts, simple structure, low cost, high assembly precision, simple assembly, good shielding property, stable operation and high operation comfort level.

Drawings

FIG. 1 is an exploded view of a split armrest hinge structure in accordance with one embodiment;

FIG. 2 is a schematic view of a hinge structure of a split armrest according to an embodiment;

FIG. 3 isbase:Sub>A sectional view A-A of FIG. 2;

FIG. 4 is a cross-sectional view B-B in FIG. 2;

FIG. 5 is a schematic view of a first hinge arm according to an embodiment;

FIG. 6 is a schematic view of the structure of the armrest seat according to the embodiment;

FIG. 7 is a schematic view of the torsion spring according to the embodiment;

FIG. 8 is a schematic view of a rotary damper according to an embodiment;

FIG. 9 is a schematic view of the inner cover plate of the armrest according to the embodiment;

FIG. 10 is a schematic view of a shield according to an embodiment;

FIG. 11 is a schematic view of the structure of the outer cover plate of the armrest according to the embodiment;

FIG. 12 is a schematic view of a side-by-side combination armrest hinge structure according to one embodiment;

FIG. 13 is a cross-sectional view of C-C of FIG. 12;

fig. 14 is a schematic structural view of a hinge structure of a split armrest of a conventional center console box described in the background art.

The partial serial numbers in the figure are: 1-an armrest seat; 2-a first hinge axis; 3-a second hinge axis; 4-a torsion spring; 5-a rotary damping member; 6-a lower cover plate of the armrest; 7-a shutter; 8-an armrest upper cover plate; 9-a foaming layer; 10-epidermis; 11-an armrest body;

101, a seat body; 102-a first articulated arm; 103—a tubular portion; 104-a second articulated arm; 105—a first hinge hole; 106, a limit groove; 107—torsion spring mounting holes; 1021-a first vertical section; 1022—a first cantilever section; 1023-a first annular boss;

401-torsion spring body; 402—torsion spring end;

501-an outer layer; 502-a first limit protrusion; 503-a second limit protrusion;

601-a lower cover plate body; 602-a step groove; 603—a first avoidance channel; 604-a second avoidance channel; 605-first card socket;

701-a shutter body; 702—a first clip leg; 703-a second clip leg; 704-a first baffle; 705-third baffle;

801-an upper cover plate body; 802-upper cover side walls; 803—a first hinge seat; 804-a second hinge mount; 805-a second baffle; 806-limit ribs; 807-torsion spring mounting slots; 808-a second bayonet mount; 809—a fourth baffle; 8010-third hinge base; 8011-fourth hinge mount; 8012-a second annular boss;

1001-a epidermis body; 1002-edge wrapping.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

The split armrest hinge structure as shown in fig. 1 to 13, which comprises an armrest seat 1, an armrest body 11, a shutter 7, and a first hinge shaft 2 having a central axis extending in the front-rear direction, wherein the armrest seat 1 comprises a seat body 101 and a first hinge arm 102, the first hinge arm 102 comprises a first vertical section 1021 having a lower end fixedly connected to the seat body 101, and a first cantilever section 1022 extending outward from an upper end of the first vertical section 1021, and a first hinge hole 105 penetrating the first cantilever section 1022 in the front-rear direction is provided on an outer end of the first cantilever section 1022; the handrail body 11 is provided with a first avoidance groove and an assembly groove positioned at the front side of the first avoidance groove, the first avoidance groove and the assembly groove are grooves with openings at the lower side, the notch of the first avoidance groove and the notch of the assembly groove are downward, the assembly groove can provide an assembly space for the first hinge shaft 2, the rear side of the first avoidance groove is provided with a first hinge seat 803 fixedly connected with the handrail body 11, the assembly groove is internally provided with a second hinge seat 804 fixedly connected with the handrail body 11, the first hinge seat 803 is provided with a second hinge hole, and the second hinge seat 804 is provided with a third hinge hole; the first cantilever segment 1022 extends into the first avoidance slot, and the first hinge shaft 2 mates with the third hinge hole, the first hinge hole 105, and the second hinge hole to hinge the second hinge base 804, the first cantilever segment 1022, and the first hinge base 803 together; the shielding member 7 is connected with the armrest body 11 through a detachable structure, the shielding member 7 covers the notch of the assembly groove, and the armrest body 11 and the shielding member 7 are connected to form an armrest.

In this embodiment, the first avoidance groove has a first outer groove wall; when the armrest body 11 is in a closed state, the first outer groove wall is positioned at the outer side of the armrest seat 1; when the armrest body 11 is in the open state, the first outer slot wall is located at the lower side of the cantilever section, and the first outer slot wall is supported upward on the cantilever section.

In this embodiment, the handrail body 11 is covered with a skin 10, and the skin 10 is provided with a wrapping 1002 covering the inner side surface of the first outer groove wall.

In this embodiment, the armrest body 11 includes a skin 10, an armrest upper cover plate 8, an armrest lower cover plate 6 fixedly connected to the lower side of the armrest upper cover plate 8, and a foaming layer 9 disposed on the upper side of the armrest upper cover plate 8, an upper cover plate side wall 802 bent downward is disposed at the outer edge of the armrest upper cover plate 8, the upper cover plate side wall 802 is disposed at the outer side of the armrest lower cover plate 6, a first avoidance groove body 603, a second avoidance groove body 604 and a step groove 602 are disposed at a position of the armrest lower cover plate 6 near the outer side, the first avoidance groove body 603 and the upper cover plate side wall 802 enclose a first avoidance groove, the second avoidance groove body 604 and the upper cover plate side wall 802 enclose a second avoidance groove, the step groove 602 and the upper cover plate side wall 802 enclose an assembly groove, the skin 10 includes the above-described edge 1002 and a skin body 1001 wrapped around the foaming layer 9, the armrest upper cover plate 8 and the armrest lower cover plate 6, the edge 1002 covers the inner side surface of the upper cover plate side wall 802, and a part of the upper cover plate side wall 802 forms a first outer groove wall. The edge 1002 can play a role in isolation and buffering between the upper cover plate side wall 802 and the first cantilever segment 1022, and prevent abnormal sound between the upper cover plate side wall 802 and the first cantilever segment 1022; the edge 1002 can be spaced between the shutter body 701 and the upper cover plate side wall 802, can prevent abnormal sound from occurring between the shutter body 701 and the upper cover plate side wall 802, and can also make the root of the shutter body 701 assembled tight, preventing the shutter 7 from loosening.

In this embodiment, still include second hinge shaft 3, be provided with second articulated arm 104 on the handrail seat 1, second articulated arm 104 includes the second vertical section of lower tip and pedestal 101 fixed connection and the second cantilever section that extends outward from the upper end of second vertical section, be equipped with the fourth hinge hole on the second cantilever section, the second dodges the groove setting in handrail body 11 and lean on the outside position, the notch of second dodges the groove setting down, the second dodges the groove and is located the front side of mounting groove, the front side of second dodges the groove is equipped with the third hinge seat 8010 with handrail body 11 fixed connection, be equipped with the fourth hinge seat 8011 with handrail body 11 fixed connection in the mounting groove, be equipped with the fifth hinge hole on the third hinge seat 8010, be equipped with the sixth hinge hole on the fourth hinge seat 8011, the mounting groove can provide the assembly space for second hinge shaft 3, the second cantilever section stretches into in the second dodging the groove, second hinge shaft 3 is with sixth hinge hole, fourth hinge hole and fifth hinge seat 8011 hinge together with the third hinge seat 8010.

In this embodiment, the first cantilever segment 1022 is provided with a tubular portion 103 extending forward into an assembly slot, the tubular portion 103 surrounds the periphery of the first hinge shaft 2, a torsion spring 4 for driving the armrest body 11 to open is disposed in the assembly slot, a torsion spring body 401 of the torsion spring 4 is sleeved on the periphery of the tubular portion 103, two torsion spring ends 402 of the torsion spring 4 are respectively connected to the first hinge arm 102 and the armrest body 11, and the torsion spring 4 is used for driving the armrest body 11 to open. Specifically, a plurality of torsion spring mounting holes 107 are formed in the first hinge arm 102, the plurality of torsion spring mounting holes 107 are formed in the periphery of the first hinge hole 105, the plurality of torsion spring mounting holes 107 are formed in the circumferential direction of the first hinge hole 105 at intervals, one torsion spring end 402 is matched with one torsion spring mounting hole 107 to achieve connection with the first hinge arm 102, and the plurality of torsion spring mounting holes 107 are formed to adjust the tightness of the torsion spring 4, so that the opening speed and the opening force of the armrest can be adjusted; a torsion spring mounting groove 807 is provided in the armrest upper cover plate 8, and the other torsion spring end 402 is mounted in the torsion spring mounting groove 807 to effect connection with the armrest body 11.

In this embodiment, the assembly groove is provided with a rotary damper 5, the rotary damper 5 includes an inner member and an outer member 501 capable of rotating relatively, the inner member is connected to the tubular portion 103, the outer member 501 is connected to the handrail body 11, and the inner member and the outer member 501 rotate relatively to generate a damping effect, and preferably, the inner member and/or the outer member 501 are made of rubber.

In this embodiment, the inner layer member is sleeved on the first hinge shaft 2, two first spacing protrusions 502 protruding backward are disposed at the rear end of the inner layer member, two first spacing protrusions 502 are disposed at intervals in the circumferential direction of the inner layer member, two spacing grooves 106 are disposed at the front end of the tubular portion 103, two first spacing protrusions 502 are respectively embedded in the two spacing grooves 106, two second spacing protrusions 503 are disposed on the outer circumferential surface of the outer layer member 501, two second spacing protrusions 503 are disposed at intervals in the circumferential direction of the outer layer member 501, spacing ribs 806 clamped between the two second spacing protrusions 503 are disposed in the assembly groove, and in the opening and closing process of the armrest, the rotary damping member 5 can generate damping effects to promote handfeel. As a preferable mode, the rotary damper 5 is located between the tubular portion 103 and the second hinge seat 804 when viewed in the front-rear direction, and can play a certain role in axial buffering and limiting, reduce axial movement of the armrest, and further reduce abnormal noise.

In this embodiment, the rear side of the first cantilever segment 1022 is provided with a first annular boss 1023 protruding backward, the first annular boss 1023 is coaxially disposed with the first hinge hole 105, a second annular boss 8012 protruding forward is disposed on the rear groove wall of the first avoiding groove, the second annular boss 8012 is coaxially disposed with the first annular boss 1023, the end face of the second annular boss 8012 and the end face of the first annular boss 1023 are utilized to limit, the contact area is reduced, the friction force can be reduced, the handrail moves more stably, the operation comfort level is higher, and abnormal sound and clamping stagnation are prevented.

As an improvement, the shielding member 7 includes a shielding member body 701, a plurality of first clamping legs 702 and a plurality of second clamping legs 703, the plurality of first clamping legs 702 are fixedly connected at the inner side edge of the shielding member body 701, the plurality of second clamping legs 703 are fixedly connected at the outer side edge of the shielding member body 701, a plurality of first clamping seats 605 respectively clamped with the plurality of first clamping legs 702 and a plurality of second clamping seats 808 respectively clamped with the plurality of second clamping legs 703 are arranged in the assembly groove, the plurality of first clamping seats 605 are fixedly connected on the armrest lower cover plate 6, the plurality of second clamping seats 808 are fixedly connected on the inner side surface of the upper cover plate side wall 802, and the plurality of first clamping legs 702, the plurality of first clamping seats 605, the plurality of second clamping legs 703 and the plurality of second clamping seats 808 form a detachable structure between the shielding member 7 and the shielding member 11.

As a modification, a front chamber and a rear chamber are provided in the armrest body 11, the front chamber and the rear chamber being formed between the armrest lower cover plate 6 and the armrest upper cover plate 8. The back cavity is located the rear side in first dodge the groove, first articulated seat 803 is located back cavity and first dodge between the groove, preceding cavity is located the front side in second dodge the groove, third articulated seat 8010 is located between preceding cavity and the second dodge the groove, fixedly connected with blocks the first baffle 704 in the front side of first hinge shaft 2 on the shield body 701, be equipped with the second baffle 805 that blocks in the rear side of first hinge shaft 2 in the back cavity, fixedly connected with blocks the third baffle 705 in the rear side of second hinge shaft 3 on the shield body 701, be equipped with the fourth baffle 809 that blocks in the front side of second hinge shaft 3 in the preceding cavity, through setting up four baffles rationally, compromise the convenience of assembly and the axial spacing to two hinge shafts.

In specific implementation, the handrail lower cover plate 6 comprises a lower cover plate body 601, a step groove 602, a first avoidance groove body 603, a second avoidance groove body 604 and a plurality of first clamping seats 605, wherein the plurality of first clamping seats 605 are connected with the lower cover plate body 601 into a whole, and the step groove 602, the first avoidance groove body 603 and the second avoidance groove body 604 are all arranged on the lower cover plate body 601. The armrest upper cover 8 includes an upper cover body 801, an upper cover side wall 802, a first hinge seat 803, a second hinge seat 804, a second baffle 805, a limit rib 806, a torsion spring mounting groove 807, a plurality of second snap seats 808, a fourth baffle 809, a third hinge seat 8010, a fourth hinge seat 8011, and a second annular boss 8012, and the upper cover body 801, the upper cover side wall 802, the first hinge seat 803, the second hinge seat 804, the second baffle 805, the limit rib 806, a plurality of second snap seats 808, the fourth baffle 809, the third hinge seat 8010, the fourth hinge seat 8011, and the second annular boss 8012 are connected as a whole, and the torsion spring mounting groove 807 is disposed on the upper cover body 801.

By adopting the above hinge structure for the split armrest, a locking mechanism is generally arranged between the armrest and the armrest seat 1, and the armrest opening process is as follows: the driving locking mechanism is unlocked, then under the action of the torsion spring 4, the armrest rotates around the first hinge shaft 2 and the second hinge shaft 3, automatic opening of the armrest is achieved, when the armrest rotates to the maximum opening angle, the first outer groove wall is supported on the first cantilever segment 1022 to play a limiting role, the armrest stops rotating, and the armrest is kept in an open state under the action of the torsion spring 4 and the limiting role of the first outer groove wall and the first cantilever segment 1022. The closing process of the armrest is as follows: the armrest is rotated about the first hinge axis 2 and the second hinge axis 3 to a horizontal position in a direction opposite to the armrest opening direction by pressing the armrest with a hand, and the armrest is locked to the armrest seat 1 by the locking mechanism. By adopting the split armrest hinge structure, through reasonably arranging the structures of all parts, an integral hinge structure is formed between the armrest seat 1 and the armrest body 11, the number of parts is reduced, the accumulation of errors is reduced, the dimensional stability is good, the assembly mode of the parts is optimized, the convenience of assembly is improved, the shielding property of the hinge structure is improved, meanwhile, the space occupied by the integral hinge structure is smaller, and the space occupied by a storage box is reduced or even eliminated.

Example two

A method for assembling a split armrest hinge structure as described in the first embodiment, comprising the steps of:

s1, preparing an armrest seat 1, an armrest body 11, a shielding member 7, a first hinge shaft 2, a second hinge shaft 3, a rotary damping member 5 and a torsion spring 4;

s2, the first cantilever segment 1022 stretches into the first avoidance groove, and the second cantilever segment stretches into the second avoidance groove, so that the handrail body 11 is in an open state;

s3, installing a first hinge shaft 2 and a second hinge shaft 3 through an assembly slot, wherein during assembly, the first hinge shaft 2 sequentially stretches into a third hinge hole, a first hinge hole 105 and a second hinge hole from front to back, the second hinge shaft 3 sequentially stretches into a sixth hinge hole, a fourth hinge hole and a fifth hinge hole from back to front, and then the torsion spring 4 and the rotary damping piece 5 are assembled;

s4, assembling the shielding member 7 on the armrest body 11 to complete the assembly of the split armrest hinge structure.

Claims (10)

1. The split armrest hinge structure is characterized by comprising an armrest seat, an armrest body, a shielding piece and a first hinge shaft, wherein the armrest seat comprises a seat body and a first hinge arm, the first hinge arm comprises a first vertical section with the lower end fixedly connected with the seat body and a first cantilever section extending outwards from the upper end of the first vertical section, and a first hinge hole is formed in the first cantilever section;

the novel handrail comprises a handrail body, and is characterized in that a first avoidance groove and an assembly groove positioned at the front side of the first avoidance groove are arranged at the position, close to the outer side, of the handrail body, the notch of the first avoidance groove and the notch of the assembly groove are downward, the assembly groove can provide an assembly space for a first hinge shaft, a first hinge seat fixedly connected with the handrail body is arranged at the rear side of the first avoidance groove, a second hinge seat fixedly connected with the handrail body is arranged in the assembly groove, a second hinge hole is formed in the first hinge seat, and a third hinge hole is formed in the second hinge seat;

the first cantilever section stretches into the first avoiding groove, and the first hinge shaft is matched with the third hinge hole, the first hinge hole and the second hinge hole so as to hinge the second hinge seat, the first cantilever section and the first hinge seat together;

the shielding piece is connected with the armrest body through a detachable structure and covers the notch of the assembly groove;

a rear cavity is arranged in the armrest body,

the rear cavity is positioned at the rear side of the first avoiding groove, the first hinge seat is positioned between the rear cavity and the first avoiding groove,

the shielding member is provided with a first baffle blocking the front side of the first hinge shaft, and the rear chamber is provided with a second baffle blocking the rear side of the first hinge shaft.

2. The split armrest hinge structure of claim 1, wherein said first relief slot has a first outer slot wall; when the armrest body is in a closed state, the first outer groove wall is positioned at the outer side of the armrest seat; when the armrest body is in an open state, the first outer groove wall is positioned at the lower side of the cantilever section, and the first outer groove wall is supported on the cantilever section upwards.

3. The side-by-side combination armrest hinge structure as set forth in claim 2, wherein said armrest body is covered with a skin having a wrapping edge covering an inner side surface of said first outer slot wall.

4. The split armrest hinge structure according to claim 3, wherein the armrest body comprises a surface skin, an armrest upper cover plate, an armrest lower cover plate fixedly connected to the armrest upper cover plate, and a foaming layer arranged on the armrest upper cover plate, an upper cover plate side wall bent downwards is arranged at the outer side edge of the armrest upper cover plate, the upper cover plate side wall is positioned on the outer side of the armrest lower cover plate, a first avoiding groove body and a step groove are arranged at the position, close to the outer side, of the armrest lower cover plate, the first avoiding groove body and the upper cover plate side wall enclose a first avoiding groove, the step groove and the upper cover plate side wall enclose an assembling groove, and the wrapping edge covers the inner side surface of the upper cover plate side wall.

5. The split armrest hinge structure according to claim 1, further comprising a second hinge shaft, wherein a second hinge arm is provided on the armrest seat, the second hinge arm comprises a second vertical section with a lower end fixedly connected with the armrest body and a second cantilever section extending outwards from an upper end of the second vertical section, a fourth hinge hole is provided on the second cantilever section, a second avoidance slot is provided on a position of the armrest body close to the outer side, a notch of the second avoidance slot is downward, the second avoidance slot is located on the front side of the assembly slot, a third hinge seat fixedly connected with the armrest body is provided on the front side of the second avoidance slot, a fourth hinge seat fixedly connected with the armrest body is provided in the assembly slot, a fifth hinge hole is provided on the third hinge seat, a sixth hinge hole is provided on the fourth hinge seat, the assembly slot can provide an assembly space for the second hinge shaft, the second cantilever section extends into the second avoidance slot, and the second hinge shaft is matched with the fourth hinge seat and the fourth hinge seat.

6. The side-by-side combination armrest hinge structure according to claim 1, wherein the first cantilever section is provided with a tubular portion extending forward into the assembly slot, the tubular portion surrounds the periphery of the first hinge shaft, the assembly slot is internally provided with a torsion spring for driving the armrest body to open, the torsion spring body of the torsion spring is sleeved on the periphery of the tubular portion, two torsion spring ends of the torsion spring are respectively connected to the first hinge arm and the armrest body, and the torsion spring is used for driving the armrest body to open.

7. The split armrest hinge structure as set forth in claim 6, wherein said assembly slot is provided with a rotary damping member comprising an inner member and an outer member capable of relative rotation, said inner member being connected to said tubular portion and said outer member being connected to said armrest body.

8. The hinge structure of claim 7, wherein the inner layer member is sleeved on the first hinge shaft, two first spacing protrusions protruding backward are disposed at the rear end of the inner layer member, the two first spacing protrusions are disposed at intervals in the circumferential direction of the inner layer member, two spacing grooves are disposed at the front end of the tubular portion, the two first spacing protrusions are respectively embedded in the two spacing grooves, two second spacing protrusions are disposed on the outer circumferential surface of the outer layer member, the two second spacing protrusions are disposed at intervals in the circumferential direction of the outer layer member, and spacing ribs between the two second spacing protrusions are disposed in the assembly groove.

9. The split armrest hinge structure according to claim 1, wherein a first annular boss protruding rearward is provided on a rear side surface of the first cantilever section, the first annular boss is coaxially provided with the first hinge hole, a second annular boss protruding forward is provided on a rear groove wall of the first avoidance groove, and the second annular boss is coaxially provided with the first annular boss.

10. A method of assembling a split armrest hinge structure as set forth in any one of claims 1-9, comprising the steps of:

s1, preparing an armrest seat, an armrest body, a shielding piece and a first hinge shaft;

s2, the first cantilever section stretches into the first avoidance groove to enable the armrest body to be in an open state;

s3, installing a first hinge shaft through an assembly slot, wherein the first hinge shaft sequentially stretches into the third hinge hole, the first hinge hole and the second hinge hole from front to back during assembly;

s4, assembling the shielding piece on the armrest body.

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