CN212359432U - Embedded hinge - Google Patents

Abstract

An embedded hinge comprises a fixed seat internally provided with an elastic transmission device and a hinge cup which is hinged, opened and closed and matched through a connecting arm component and the fixed seat, wherein the connecting arm component comprises a first connecting arm; the first connecting arm is provided with an elastic action part matched with the elastic transmission device; the position where the elastic action part and the elastic transmission device are matched and acted is provided with a rolling part, the elastic action part and the elastic transmission device are respectively provided with a first limiting assembly, a second limiting assembly is arranged in the fixed seat, and the first limiting assembly and the second limiting assembly form a rolling area; in the opening and closing process of the hinge, the elastic action part and the elastic transmission device are respectively in rolling contact with the rolling piece, and the rolling piece is limited to roll on the rolling area. The utility model discloses effectively replace traditional hinge in the switching, the mode that sliding contact took place for the elastic action portion of the direct and first linking arm of driving medium, solved sliding contact and leaded to the wearing and tearing of part.

Description

Embedded hinge

Technical Field

The utility model relates to a hinge specifically is an bury formula hinge.

Background

Chinese patent document No. CN109267869A discloses an assembly structure of an embedded hinge in 2019.01.25, and from fig. 4 and fig. 5 in the drawings of the specification of the patent document, it can be seen that a transmission member directly contacts with an elastic action portion of a first connecting arm in a sliding manner, such a structure results in that in a hinge testing process, due to repeated closing of the hinge, the contact position between the transmission member and the elastic action portion of the first connecting arm is worn, and the transmission member and the elastic action portion are made of metal materials, and the processing surfaces of the transmission member and the elastic action portion are damaged under wear, which results in poor matching of the original contact position and affects opening and closing of the hinge.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hinge opens and shuts smoothly, long service life, test durability are good, effectively solve traditional hinge in the switching, the mode that sliding contact took place for the elastic action portion of driving medium directness and first connecting arm, solve sliding contact and lead to the formula hinge of buryying of wearing and tearing that the part produced to overcome the weak point among the prior art.

The embedded hinge comprises a fixed seat internally provided with an elastic transmission device and a hinged cup which is hinged, opened and closed and matched with the fixed seat through a connecting arm component, wherein the connecting arm component comprises a first connecting arm, the first connecting arm part is hinged with the hinged cup, and the other part of the first connecting arm is hinged with the fixed seat; in the opening and closing of the hinge, the first connecting arm is provided with an elastic action part matched with the elastic transmission device, and the elastic hinge opening and closing of the hinged cup relative to the fixed seat is realized through the matching of the elastic transmission device and the elastic action part; the position where the elastic action part and the elastic transmission device are matched and acted is provided with a rolling part, the elastic action part and the elastic transmission device are respectively provided with a first limiting assembly, a second limiting assembly is arranged in the fixed seat, and the first limiting assembly and the second limiting assembly form a rolling area; in the opening and closing process of the hinge, the elastic action part and the elastic transmission device are respectively in rolling contact with the rolling piece, and the rolling piece is limited to roll on the rolling area.

The elastic transmission device comprises a transmission part, one end of the transmission part is hinged in the fixing seat, the elastic transmission device further comprises an elastic guide part and an elastic part, one end of the elastic part elastically acts on the fixing seat, the other end of the elastic part elastically acts on the elastic guide part and the transmission part, the transmission part is in rolling contact with the rolling part through the elastic part and the elastic guide part in the opening and closing process of the hinge, and the rolling part is limited on a rolling area when in contact with the transmission part.

First spacing subassembly is including setting up the breach in the elastic action portion to and the contact site of setting on the driving medium, and the rolling member is spacing to be installed on the breach, and the rolling member is located between elastic action portion and the contact site, forms clearance L through the rolling member between the outer wall of the two of elastic action portion and contact site.

The mode that the transmission part directly slides and contacts with the elastic action part of the first connecting arm in the opening and closing process of the traditional hinge is effectively replaced, and the abrasion of parts caused by sliding contact is avoided; contact portion and breach form horizontal centre gripping rolling member to restriction rolling member transversely rolls the degree of freedom, on the hinge transverse direction, half volume of cladding rolling member about the breach at least, so that both ends form about the breach centre gripping rolling member, centre gripping rolling member around breach inner wall, the contact portion, at the hinge in-process of opening and close, the rolling member rolls in the rolling region all the time, prevents that the rolling member from breaking away from the rolling region of settlement.

The inner wall of the contact rolling piece is arranged in the gap, the shape of the inner wall is matched with the shape of the outer surface of the rolling piece, and the contact part is provided with a contact surface which is in contact with the rolling piece; the contact surface is provided with a zigzag section which is in surface contact with the rolling element; the inner wall is arc-shaped or curved; the rolling members are cylindrical or spherical. The outer surface of the rolling part is a smooth surface, the rolling part rolls smoothly, and no noise is generated in the opening and closing process of the hinge.

The spacing subassembly of second forms the trench including setting up punch holder and the lower plate in the fixing base between punch holder and the lower plate, and the rolling member is located on the trench, and each other is clearance fit between the two, prevents that the rolling member from deviating from the trench.

The upper clamping plate and the lower clamping plate form an upper clamping rolling part and a lower clamping rolling part so as to limit the freedom degree of the up-and-down displacement of the rolling parts and prevent the up-and-down deviation of the rolling parts in the assembling process, the assembling process or the opening and closing process of the hinge.

The rolling parts are rollers, bearings or balls and are made of metal.

Still be equipped with the attenuator in the fixing base, the attenuator includes the cylinder body at least to and the piston rod of slip flexible in the cylinder body, in the hinge is opened and close, be equipped with on the first connecting arm with piston rod matched with damping effect portion, damping effect portion relies on the piston rod when the hinge is closed at least, the piston rod slides flexible in the cylinder body, realizes that the damping of the relative fixing base of hinge cup is closed.

The position where the damping action part is contacted with the piston rod is provided with a zigzag position, and the damping action part and the piston rod interact through the zigzag position.

The connecting arm assembly further comprises a second connecting arm, the second connecting arm is hinged with the hinge cup, and the other part of the second connecting arm is hinged with the fixed seat; the hinged cup is hinged and opened on the fixed seat through the matching of the first connecting arm and the second connecting arm.

An up-down position adjusting part is arranged between the hinged cup and the fixed seat so as to at least realize the up-down position adjustment between the hinged cup and the fixed seat; and/or a front-back position adjusting piece and a left-right position adjusting piece are arranged between the elastic transmission device, the damper and the connecting arm assembly and the fixed seat respectively, so that the front-back and left-right position adjustment between the elastic transmission device, the damper and the connecting arm assembly and the fixed seat is realized at least.

The utility model has the advantages that:

a. be equipped with the rolling member on the position of elastic action portion and the elastic transmission device cooperation effect, open and close the in-process at the hinge, elastic action portion, elastic transmission device respectively with rolling member rolling contact, elastic transmission device includes that one end articulates the driving medium in the fixing base, first spacing subassembly is including setting up the breach in elastic action portion, and the contact site of setting on the driving medium, the spacing installation of rolling member is in the breach, and the rolling member is located between elastic action portion and the contact site, be separated by a clearance L through the rolling member between the outer wall of elastic action portion and the contact site two, effectively replace traditional hinge and open and close the in-process, the direct elastic action portion sliding contact's with first linking arm mode of driving medium, solve sliding contact and lead to the wearing and tearing that the part produced, and then protect original elastic action portion, the machined surface of contact site.

Sliding contact between the contact site with elastic action portion and driving medium changes rolling contact into through the rolling member, and the hinge is opened and close smoothly, and the number of times of opening and shutting of hinge is original several times, can test the number of times of opening and shutting of hinge repeatedly, increases test data, and test data is more accurate, prolongs the life of hinge moreover, accords with the standard of using.

b. The elastic action part and the elastic transmission device are respectively provided with a first limiting assembly, a second limiting assembly is arranged in the fixed seat, and the first limiting assembly and the second limiting assembly form a rolling area; the rolling part is limited to roll in the rolling area, and the rolling part rolls in the rolling area all the time in the opening and closing process of the hinge, so that the rolling part is prevented from being separated from the set rolling area.

c. The outer surface of the rolling part is a smooth surface, the rolling part rolls smoothly, and no noise is generated in the opening and closing process of the hinge.

d. Be equipped with tortuous position on the position that contacts between damping effect portion and the piston rod, through tortuous phase interact between damping effect portion and the piston rod, the effect distance between effectual extension damping effect portion of tortuous position ability and the piston rod avoids damping effect portion and piston rod to collide each other suddenly when the relative fixing base of hinge cup is articulated closed, leads to the problem that the hinge closed process is not smooth and easy or the noise is big, further improves user's use and experiences.

Drawings

Fig. 1 and fig. 2 are schematic structural views illustrating an open state of the embedded hinge according to an embodiment of the present invention.

Fig. 3 is a schematic view of an internal structure of an open state of an embedded hinge according to an embodiment of the present invention.

Fig. 4 and 5 are partially enlarged views of fig. 3.

Fig. 6 and 7 are schematic structural views illustrating a closed state of the embedded hinge according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of an internal structure of an embedded hinge according to an embodiment of the present invention in a closed state.

Fig. 9 and 10 are partially enlarged views of fig. 8, respectively.

Fig. 11 is a schematic structural view illustrating the upper clamp plate and the lower clamp plate respectively clamping the rolling members according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a transmission member according to an embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a first connecting arm according to an embodiment of the present invention.

Fig. 14 is an exploded view of an embodiment of the present invention.

Fig. 15 is an exploded view of another embodiment of the present invention showing an embedded hinge.

Fig. 16 is a schematic structural view of a movable member according to an embodiment of the present invention.

Fig. 17 is a schematic structural view of an upper clamp plate, a lower clamp plate and a damper according to an embodiment of the present invention.

Fig. 18 is a schematic view of an exploded structure in a hinge cup according to an embodiment of the present invention.

Fig. 19 is a schematic view of an assembly structure of the cabinet, the embedded hinge, and the door according to an embodiment of the present invention.

Fig. 20 is a partially enlarged view of fig. 19.

Fig. 21 is a schematic structural view illustrating the door body of the present invention being opened toward the cabinet body.

Fig. 22 is a schematic view of another direction structure of the door body opening towards the cabinet body according to an embodiment of the present invention.

Fig. 23 is an exploded view of the cabinet, the embedded hinge, and the door according to an embodiment of the present invention.

In the drawing, 1 is a fixed base, 2 is a hinge cup, 3 is a first connecting arm, 3.1 is an elastic acting portion, 3.2 is a notch, 3.3 is an inner wall, 3.4 is a damping acting portion, 4 is a rolling member, 5 is a transmission member, 5.1 is a contact portion, 5.2 is a contact surface, 5.3 is a transmission portion, 6 is an upper plate, 7 is a lower plate, 8 is an elastic guide member, 8.1 is a concave portion, 9 is an elastic member, 10 is a damper, 10.1 is a cylinder body, 10.2 is a piston rod, 11 is a second connecting arm, 12 is a front-rear position adjusting member, 13 is a left-right position adjusting member, 14 is an up-down position adjusting member, 15 is a movable member, 16 is a hinge cup movable member, 17 is a cabinet body, 17.1 is a groove, 18 is a door body, and 18.1 is an accommodating groove.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1-5, and 6-10, an embedded hinge comprises a fixed base 1 with an elastic transmission device inside, and a hinge cup 2 forming a hinged opening and closing fit with the fixed base 1 through a connecting arm assembly, wherein the connecting arm assembly comprises a first connecting arm 3, a part of the first connecting arm 3 is hinged with the hinge cup 2, and the other part of the first connecting arm 3 is hinged with the fixed base 1; in the opening and closing of the hinge, the first connecting arm 3 is provided with an elastic action part 3.1 matched with the elastic transmission device, and the elastic hinge opening and closing of the hinged cup 2 relative to the fixed seat 1 are realized through the matching of the elastic transmission device and the elastic action part 3.1; a rolling part 4 is arranged at the position where the elastic action part 3.1 and the elastic transmission device are matched to act, a first limiting component is arranged on the elastic action part 3.1 and the elastic transmission device respectively, a second limiting component is arranged in the fixed seat 1, and a rolling area is formed by the first limiting component and the second limiting component; in the opening and closing process of the hinge, the elastic action part 3.1 and the elastic transmission device are respectively in rolling contact with the rolling piece 4, and the rolling piece 4 rolls on the rolling area in a limiting mode.

With reference to fig. 5 and 10, referring to fig. 12 and 13, the elastic transmission device includes a transmission member 5 having one end hinged in the fixing base 1, and further includes an elastic guide member 8 and an elastic member 9, one end of the elastic member 9 elastically acts on the fixing base 1, and the other end elastically acts on the elastic guide member 8 and the transmission member 5, in the opening and closing process of the hinge, the transmission member 5 is in rolling contact with the rolling member 4 through the elastic member 9 and the elastic guide member 8, and the rolling member 4 is limited on the rolling area when contacting with the transmission member 5.

One end of the elastic guide piece 8 is provided with a concave part 8.1, and the transmission piece 5 is provided with a transmission part 5.3 abutted against the concave part 8.1; when the hinge is closed, the hinge cup 2 drives the rolling piece 4 to roll and contact the transmission piece 5 through the notch 3.2 on the first connecting arm 3, the transmission piece 5 rotates and contacts the elastic guide piece 8, and the elastic guide piece 8 extrudes the elastic piece 9 in the fixed seat 1; or when the hinge is opened, the elastic part 9 is reset and springs the transmission part 5 through the elastic guide part 8, and the transmission part 5 and the rolling part 4 are in rolling contact; and in the opening and closing process of the hinge, the rolling piece 4 moves along with the first connecting arm 3 or the transmission piece 5, and the rolling piece 4 rolls on a rolling area formed by the contact surface 5.2, the inner wall 3.3, the upper clamping plate 6 and the lower clamping plate 7 in a limiting mode.

First spacing subassembly is including setting up breach 3.2 on elasticity effect portion 3.1 to and the contact site 5.1 of setting on driving medium 5, and rolling member 4 is spacing to be installed on breach 3.2, and rolling member 4 is located between elasticity effect portion 3.1 and the contact site 5.1, forms clearance L through rolling member 4 between the outer wall of elasticity effect portion 3.1 and the contact site 5.1 the two.

An inner wall 3.3 contacting with the rolling part 4 is arranged in the gap 3.2, the shape of the inner wall 3.3 is matched with the shape of the outer surface of the rolling part 4, and a contact surface 5.2 contacting with the rolling part 4 is arranged on the contact part 5.1; the contact surface 5.2 is provided with a zigzag section which is in surface contact with the rolling element 4; the inner wall 3.3 is arc-shaped or curved; the rolling elements 4 are cylindrical.

The second limiting component comprises an upper clamping plate 6 and a lower clamping plate 7 which are arranged in the fixing seat 1, a slot is formed between the upper clamping plate 6 and the lower clamping plate 7, and the rolling piece 4 is positioned on the slot and is in clearance fit with each other.

The rolling elements 4 are rollers, or bearings, or balls, and the rolling elements 4 are made of metal.

Still be equipped with attenuator 10 in the fixing base 1, attenuator 10 includes cylinder body 10.1 at least to and the piston rod 10.2 of sliding flexible in cylinder body 10.1, in the hinge is opened and close, be equipped with on the first linkage arm 3 with piston rod 10.2 matched with damping action portion 3.4, damping action portion 3.4 relies on piston rod 10.2 when the hinge is closed at least, piston rod 10.2 slides flexible in cylinder body 10.1, realizes that the damping of hinge cup 2 relative fixing base 1 is closed.

The damping action part 3.4 is separated from or contacted with the piston rod 10.2 in the opening and closing process of the hinge, so that the piston rod 10.2 slides and stretches in the cylinder body 10.1.

The position where the damping action part 3.4 is contacted with the piston rod 10.2 is provided with a zigzag position, and the damping action part 3.4 and the piston rod 10.2 interact through the zigzag position.

Wherein, the damping action part 3.4 is gradually separated from the piston rod 10.2 along with the movement of the first connecting arm 3 when the hinge is opened; or, when the hinge is closed, the damping action part 3.4 gradually approaches and contacts the piston rod 10.2, and the piston rod 10.2 gradually retracts into the cylinder body 10.1 so as to play a role of buffering and damping in the closing of the hinge.

The connecting arm assembly further comprises a second connecting arm 11, part of the second connecting arm 11 is hinged with the hinged cup 2, and the other part of the second connecting arm 11 is hinged with the fixed seat 1; the hinged cup 2 is hinged and opened on the fixed seat 1 through the matching of the first connecting arm 3 and the second connecting arm 11.

Referring to fig. 14-18, an up-down position adjusting part 14 is arranged between the hinge cup 2 and the fixed seat 1 to at least realize up-down position adjustment between the hinge cup 2 and the fixed seat 1; and/or a front-back position adjusting piece 12 and a left-right position adjusting piece 13 are arranged between the elastic transmission device, the damper 10 and the connecting arm assembly and the fixed seat 1 respectively, so that the front-back and left-right position adjustment between the elastic transmission device, the damper 10 and the connecting arm assembly and the fixed seat 1 is at least realized.

The fixed seat 1 is also provided with a movable part 15 for adjusting the positions of the elastic transmission device and the damper, and the first connecting arm 3 and the second connecting arm 11 are respectively and rotatably connected with a hinged cup movable part 16; the front-back position adjusting piece 12 and the left-right position adjusting piece 13 are respectively positioned and rotated on the movable piece 15, and respectively drive the movable piece 15 to move front and back and left and right in the fixed seat 1 under the positioning and rotation, so that the front-back and left-right position adjustment between the elastic transmission device, the damper and the connecting arm assembly and the fixed seat 1 is at least realized; the up-down position adjusting piece 14 is positioned and rotated on the hinge cup 2 and drives the hinge cup moving piece 16 to move up and down on the hinge cup 2 under the positioning and rotation, so that at least up-down position adjustment between the hinge cup 2 and the fixed seat 1 is realized.

The front-rear position adjusting member 12 is an eccentric screw, and an eccentric shaft of the eccentric screw is inserted into the movable member 15.

The left-right position adjusting member 13 is a screw, and a screw portion of the screw is inserted into a screw hole of the movable member 15.

The up-down position adjusting member 14 is an eccentric screw, and an eccentric shaft of the eccentric screw is inserted into the hinge cup moving member 16.

The fixing seat 1 comprises a face cover 1.1 and a bottom cover 1.2, the face cover 1.1 is buckled with the bottom cover 1.2, so that an assembly space is formed between the face cover 1.1 and the bottom cover 1.2, the elastic transmission device, the damper 10, the moving part 15, the rolling part 4, the upper clamping plate 6 and the lower clamping plate 7 are partially hinged with the fixing seat 1, and the first connecting arm 3 and the second connecting arm 11 are hermetically installed in the assembly space through the face cover 1.1 and the bottom cover 1.2.

Referring to fig. 16 and 17, the upper clamping plate 6 and the lower clamping plate 7 are provided with clearance spaces corresponding to the elastic members 8, one end of each elastic member 8 abuts against the inside of a slot of the movable member 15, and each elastic member 8 is a compression spring; the upper clamping plate 6 and the lower clamping plate 7 are both provided with fixing grooves corresponding to the dampers 10, and the dampers 10 are installed in the fixing grooves in a limiting mode.

Referring to fig. 19-23, a groove 17.1 is formed on the cabinet 17, the fixing seat 1 is embedded in the groove 17.1, and the fixing seat 1 is fixed on the cabinet 17 by a screw, a containing groove 18.1 for embedding the hinge cup 2 is formed on the inner side of the door 18, and the hinge cup 2 is fixed on the inner side of the door 18 by a screw, the cabinet 17 is hinged with the door 18 by a hinge, so that the door 18 is opened and closed on the cabinet 17.

The foregoing is a preferred embodiment of the present invention showing and describing the basic principles, main features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and the scope of the invention is to be protected. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An embedded hinge comprises a fixed seat (1) internally provided with an elastic transmission device, and a hinged cup (2) which is hinged, opened and closed and matched with the fixed seat (1) through a connecting arm component, wherein the connecting arm component comprises a first connecting arm (3), one part of the first connecting arm (3) is hinged with the hinged cup (2), and the other part of the first connecting arm (3) is hinged with the fixed seat (1); in the opening and closing of the hinge, the first connecting arm (3) is provided with an elastic action part (3.1) matched with the elastic transmission device, and the hinge cup (2) is elastically hinged to open and close relative to the fixed seat (1) through the matching of the elastic transmission device and the elastic action part (3.1); the method is characterized in that: a rolling part (4) is arranged at the position where the elastic action part (3.1) and the elastic transmission device are matched to act, a first limiting component is arranged on the elastic action part (3.1) and the elastic transmission device respectively, a second limiting component is arranged in the fixed seat (1), and a rolling area is formed by the first limiting component and the second limiting component; in the opening and closing process of the hinge, the elastic action part (3.1) and the elastic transmission device are respectively in rolling contact with the rolling piece (4), and the rolling piece (4) rolls on the rolling area in a limiting mode.

2. The buried hinge of claim 1, wherein: elastic transmission includes that one end articulates driving medium (5) in fixing base (1), elastic transmission still includes elastic guide piece (8) and elastic component (9), elastic component (9) one end elasticity is used in fixing base (1), other end elasticity is used in elastic guide piece (8), on driving medium (5), in the hinge in-process of opening and close, driving medium (5) are through elastic component (9), elastic guide piece (8) and rolling member (4) rolling contact, spacing on the rolling region when rolling member (4) and driving medium (5) contact.

3. The buried hinge of claim 2, wherein: first spacing subassembly is including setting up breach (3.2) on elasticity effect portion (3.1) to and contact site (5.1) of setting on driving medium (5), rolling member (4) are spacing to be installed on breach (3.2), and rolling member (4) are located between elasticity effect portion (3.1) and contact site (5.1), form clearance L through rolling member (4) between the outer wall of elasticity effect portion (3.1) and contact site (5.1) the two.

4. The buried hinge of claim 3, wherein: an inner wall (3.3) contacting with the rolling part (4) is arranged in the gap (3.2), the shape of the inner wall (3.3) is matched with the shape of the outer surface of the rolling part (4), and a contact surface (5.2) contacting with the rolling part (4) is arranged on the contact part (5.1); the contact surface (5.2) is provided with a zigzag section which is in surface contact with the rolling element (4); the inner wall (3.3) is arc-shaped or curved; the rolling member (4) is cylindrical.

5. The buried hinge of claim 4, wherein: the second limiting component comprises an upper clamping plate (6) and a lower clamping plate (7) which are arranged in the fixing seat (1), a groove is formed between the upper clamping plate (6) and the lower clamping plate (7), and the rolling piece (4) is positioned on the groove and is in clearance fit with each other.

6. The embedded hinge of any one of claims 1-5, wherein: the rolling elements (4) are rollers, bearings or balls, and the rolling elements (4) are made of metal.

7. The buried hinge of claim 6, wherein: still be equipped with attenuator (10) in fixing base (1), attenuator (10) include cylinder body (10.1) at least, and slide flexible piston rod (10.2) in cylinder body (10.1), in the hinge is opened and close, be equipped with on first linkage arm (3) with piston rod (10.2) matched with damping effect portion (3.4), damping effect portion (3.4) rely on piston rod (10.2) when the hinge closure at least, piston rod (10.2) slide flexible in cylinder body (10.1), realize that the damping of hinge cup (2) relative fixing base (1) is closed.

8. The buried hinge of claim 7, wherein: the position where the damping action part (3.4) is contacted with the piston rod (10.2) is provided with a zigzag position, and the damping action part (3.4) and the piston rod (10.2) interact through the zigzag position.

9. The buried hinge of claim 8, wherein: the connecting arm assembly further comprises a second connecting arm (11), part of the second connecting arm (11) is hinged with the hinged cup (2), and the other part of the second connecting arm (11) is hinged with the fixed seat (1); the hinged cup (2) is hinged and opened on the fixed seat (1) through the matching of the first connecting arm (3) and the second connecting arm (11).

10. The buried hinge of claim 9, wherein: an up-down position adjusting part (14) is arranged between the hinged cup (2) and the fixed seat (1) so as to at least realize the up-down position adjustment between the hinged cup (2) and the fixed seat (1); and/or a front-back position adjusting piece (12) and a left-right position adjusting piece (13) are arranged between the elastic transmission device, the damper (10) and the connecting arm assembly and the fixed seat (1) respectively, so that front-back and left-right position adjustment between the elastic transmission device, the damper (10) and the connecting arm assembly and the fixed seat (1) is realized at least.

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