Hinge with buffering function for low-voltage cabinet door

Abstract

The utility model discloses a hinge with a buffering function for a low-voltage cabinet door, the hinge with the buffering function for the low-voltage cabinet door comprises a first hinge and a second hinge, the first hinge is fixed on a cabinet body, the second hinge is fixed on the cabinet door, the first hinge is hinged to the second hinge, the first hinge is provided with a buffering device, and the second hinge is provided with a buffering device. The buffer is used for buffering impact force generated by rotation of the second hinge; the buffering device comprises a first spring and a movable block, first through holes are formed in the two sides of the movable block, the movable block is arranged on the first guide column, and the first spring is arranged on the outer wall of the first guide column. Through the buffer device and the telescopic buffer assembly, the impact force generated when the cabinet door is opened and the cabinet body is greatly reduced, the opening and closing force needing to be borne by the first hinge and the second hinge is reduced, and the connection stability between the first hinge and the cabinet body, between the second hinge and the cabinet door and between the first hinge and the second hinge is improved; the product has a buffering function, and the service life of the hinge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage cabinets, in particular to a hinge with a buffering function for a low-voltage cabinet door. Background Art

[0002] The "door hinge" structure of the low-voltage switchgear determines the opening angle of the cabinet door and the falling condition of the cabinet door.

[0003] The existing door hinges have the following problems: the existing cabinet doors are large in size, and control equipment, electronic equipment, etc. are installed on the cabinet doors. As a result, after the staff opens the cabinet door, the total weight of the cabinet door plus the force of opening the cabinet door causes the cabinet door to move rapidly until the cabinet door collides with the cabinet body. The impact force generated by the collision causes the hinge to bear a large opening and closing force, resulting in loose hinge connection, poor stability, cabinet door offset and other problems. Therefore, the applicant has made a useful design and found a solution to the above problems. The technical solution to be introduced below was produced in this context. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional low-voltage cabinet door hinge design and provide a product with a buffer function and a longer hinge service life.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A hinge with a buffering function for a low-voltage cabinet door comprises a cabinet body, a cabinet door, a first hinge and a second hinge, wherein the first hinge is fixed to the cabinet body, the second hinge is fixed to the cabinet door, the first hinge is hinged to the second hinge, and the first hinge is provided with a buffering device for buffering the impact force generated by the rotation activity of the second hinge; the buffering device comprises a first spring and a movable block, the movable block is provided with first through holes on both sides and is arranged on a first guide column, the first spring is arranged on the outer wall of the first guide column and abuts against the end face of the first blind hole and the movable block, so that the movable block abuts against the back side of the concave cavity, the movable block is provided with at least two connecting blocks and passes through a avoidance through hole, and the connecting block is provided with a third through hole; the second hinge is provided with a supporting block, and a telescopic buffer assembly is provided between the supporting block and the buffering device, which is used to buffer the impact force generated by the rotation activity of the second hinge through telescopic movement.

[0007] Preferably, the first hinge is provided with at least two concave cavities, first blind holes are provided on both sides of the concave cavities, first guide columns are provided between the first blind holes and the opposite surfaces of the concave cavities, limit blocks are provided between the first blind holes, chamfers are provided on the tops of the opposite surfaces of the concave cavities, end covers are provided on the tops of the concave cavities, and the end covers are provided with avoidance through holes.

[0008] Preferably, the support block is provided with a second through hole, the support block is provided with a reinforcing rib, and the first hinge and the second hinge are provided with a plurality of mounting holes.

[0009] Preferably, the telescopic buffer assembly includes a first telescopic block, a second telescopic block, a second spring and a third spring. The two side walls of the first telescopic block are provided with limiting grooves, the end face of the limiting groove is provided with a second blind hole, a second guide column is provided between the second blind hole and the end face of the limiting groove, a clearance groove is provided between the limiting grooves, the second telescopic block is arranged on both sides of the first telescopic block, the second telescopic block is provided with an extension block, the extension block is provided with a third through hole and is arranged on the second guide column, the second spring is arranged on the outer wall of the second guide column and abuts the end face of the second blind hole and the extension block, a top plate is provided between the extension blocks, the center of the clearance groove is provided with a third guide column and passes through the top plate, a baffle is provided at one end of the third guide column, and the third spring is arranged on the outer wall of the third guide column and abuts the baffle and the top plate.

[0010] Preferably, the first telescopic block is provided with a first hinged through hole and is hinged to the second through hole, the second telescopic block is provided with a second hinged through hole and is hinged to the third through hole, the second hinged through hole is provided with a countersunk hole, the first hinged through hole is provided with a first fixed axis, the second hinged through hole is provided with a second fixed axis, and the head of the second fixed axis is arranged in the countersunk hole and is flush with the surface of the second telescopic block.

[0011] Beneficial effects:

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] According to the utility model, when the cabinet door is opened, the second hinge moves toward the first hinge in a rotational motion. As the distance between the second hinge and the first hinge is shortened, the switching force is transmitted to the movable block through the telescopic buffer assembly, so that the movable block moves in the direction of the limit block. The first spring is used to reduce the switching force and the impact force. When the movable block abuts against the limit block, the second telescopic block moves toward the other end of the limit groove, and the third spring slows down the impact force of the second telescopic block. Through the above two buffer devices, the impact force generated by the collision when opening and closing the cabinet door is greatly reduced, and the hinge needs to bear a larger switching force, thereby improving the connection stability between the first hinge and the cabinet body, the second hinge and the cabinet door, and the first hinge and the second hinge. The problems raised in the background technology are overcome, so that the product has the advantages of buffer function and increased hinge service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a hinge with a buffering function for a low-voltage cabinet door according to the utility model;

[0015] Figure 2This is a schematic diagram of the exploded structure of a hinge with a buffering function for a low-voltage cabinet door according to the utility model;

[0016] Figure 3 The utility model discloses an explosion-proof hinge with a buffering function for a low-voltage cabinet door. Figure 1 ;

[0017] Figure 4 The utility model discloses an explosion-proof hinge with a buffering function for a low-voltage cabinet door. Figure 2 ;

[0018] Figure 5 The utility model discloses an explosion-proof hinge with a buffering function for a low-voltage cabinet door. Figure 3 ;

[0019] Figure 6 It is a top view cross-sectional view of a telescopic buffer assembly of a hinge with a buffer function for a low-voltage cabinet door according to the utility model;

[0020] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0021] Reference numerals: 1, cabinet body; 2, cabinet door; 3, first hinge; 4, second hinge; 5, buffer device; 6, telescopic buffer assembly; 7, end cover; 8, mounting hole;

[0022] 31. concave cavity; 32. first guide rail; 33. first blind hole; 34. first guide column; 35. limit block; 36. chamfer;

[0023] 41. support block; 42. second through hole; 43. reinforcing rib;

[0024] 51. first spring; 52. movable block; 53. first through hole; 54. connecting block; 55. third through hole;

[0025] 61. first telescopic block; 62. second telescopic block; 63. second spring; 64. third spring; 65. top plate; 66. first fixed axis; 67. second fixed axis;

[0026] 611, limiting groove; 612, second blind hole; 613, second guide post; 614, giving way groove; 615, third guide post; 616, baffle; 617, first hinged through hole;

[0027] 621, extension block; 622, second hinge through hole; 623, countersunk hole;

[0028] 71. Avoid through hole. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Reference example Figures 1 to 6 A hinge with a buffering function for a low-voltage cabinet door comprises a first hinge 3 and a second hinge 4. The first hinge 3 is fixed to a cabinet body 1, and the second hinge 4 is fixed to a cabinet door 2. The first hinge 3 is hinged to the second hinge 4. The first hinge 3 is provided with a buffering device 5 for buffering the impact force generated by the rotation of the second hinge 4. The buffering device 5 comprises a first spring 51 and a movable block 52. The movable block 52 has first through holes 53 on both sides and is arranged on a first guide column 34. The first spring 51 is arranged on the outer wall of the first guide column 34 and abuts against the end surface of the first blind hole 33 and the movable block 52, so that the movable block 52 The movable block 52 abuts against the back of the concave cavity 31, and the movable block 52 is provided with at least two connecting blocks 54, and passes through the avoidance through hole 71, and the connecting block 54 is provided with a third through hole 55; the second hinge 4 is provided with a supporting block 41, and a telescopic buffer assembly 6 is provided between the supporting block 41 and the buffer device 5, which is used to buffer the impact force generated by the rotation activity of the second hinge 4 through telescopic movement, the first through hole 53 is used in conjunction with the first guide column 34, and the first spring 51 plays the role of absorbing impact force and storing energy, the connecting block 54 is used in conjunction with the second telescopic block 62 for hinged use, and the third through hole 55 is used in conjunction with the second fixed shaft 67;

[0032] It is worth mentioning that the first hinge 3 is provided with at least two concave cavities 31, first blind holes 33 are provided on both sides of the concave cavity 31, first guide pillars 34 are provided between the first blind holes 33 and the opposite surfaces of the concave cavity 31, and limit blocks 35 are provided between the first blind holes 33. The top of the opposite surface of the concave cavity 31 is provided with a chamfer 36, and the top of the concave cavity 31 is provided with an end cover 7, and the end cover 7 is provided with an avoidance through hole 71. The concave cavity 31 provides a holding space for the buffer device 5, and the first blind hole 33 provides a holding space for the first spring 51 to prevent the first spring 51 from being overly compressed, thereby reducing the elastic potential energy. The first guide pillar 34 provides a guiding function for the movable block 52 and prevents the first spring 51 from falling off. The limit block 35 limits the movable distance of the movable block 52, and the chamfer 36 prevents the second telescopic block 62 from rubbing against the top of the concave cavity 31. The end cover 7 plays a role in protecting the buffer device 5, and the avoidance through hole 71 is used in conjunction with the connecting block 54.

[0033] It is worth mentioning that the support block 41 is provided with a second through hole 42, the support block 41 is provided with a reinforcing rib 43, the first hinge 3 and the second hinge 4 are provided with a plurality of mounting holes 8, the support block 41 raises the height of the connection between the telescopic buffer assembly 6 and the movable block 52 to prevent the first telescopic block 61 and the second telescopic block 62 from touching the first hinge 3, the reinforcing rib 43 improves the connection and fixing strength between the support block 41 and the second hinge 4 to prevent the impact force from damaging the support block 41, and the mounting holes 8 facilitate installation;

[0034] It is worth mentioning that the telescopic buffer assembly 6 includes a first telescopic block 61, a second telescopic block 62, a second spring 63, and a third spring 64. The two side walls of the first telescopic block 61 are provided with a limiting groove 611, and the end surface of the limiting groove 611 is provided with a second blind hole 612. A second guide column 613 is provided between the second blind hole 612 and the end surface of the limiting groove 611. A clearance groove 614 is provided between the limiting grooves 611. The second telescopic block 62 is arranged on both sides of the first telescopic block 61. The second telescopic block 62 is provided with an extension block 621. The extension block 621 is provided with a third through hole 55 and is arranged on the second guide column 613. The second spring 63 is arranged on the outer wall of the second guide column 613 and abuts against the end surface of the second blind hole 612 and the extension block 621. A top plate 65 is provided between the extension blocks 621. The center of the clearance groove 614 is provided with a third guide column 615, and passes through the top The third guide post 615 is provided with a baffle 616 at one end, and the third spring 64 is arranged on the outer wall of the third guide post 615 and abuts against the baffle 616 and the top plate 65. The limiting groove 611 provides an accommodation space for the extension block 621, and the second blind hole 612 provides an accommodation space for the second spring 63 to prevent the second spring 63 from being too compressed, thereby reducing the elastic potential energy. The second guide post 613 plays a guiding role for the second extension block 621 and prevents the second spring 63 from falling off. The recess 614 cooperates with the top plate 65, and the reaction force of the second spring 63 is transmitted to the second telescopic block 62 through the extension block 621. The third through hole 55 cooperates with the second guide post 613, and the baffle 616 provides a supporting role for the third spring 64. The third guide post 615 prevents the third spring 64 from falling off, and the reaction force of the third spring 64 is greater than the total reaction force of the second spring 63.

[0035] It is worth mentioning that the first telescopic block 61 is provided with a first hinged through hole 617 and is hinged to the second through hole 42, the second telescopic block 62 is provided with a second hinged through hole 622 and is hinged to the third through hole 55, the second hinged through hole 622 is provided with a countersunk hole 623, the first hinged through hole 617 is provided with a first fixed shaft 66, the second hinged through hole 622 is provided with a second fixed shaft 67, and the head of the second fixed shaft 67 is arranged in the countersunk hole 623 and is flush with the surface of the second telescopic block 62, the first fixed shaft 66 is used in conjunction with the first hinged through hole 617 to prevent the first telescopic block 61 and the support block 41 from falling off, the second fixed shaft 67 is used in conjunction with the second hinged through hole 622 to prevent the second telescopic block 62 and the connecting block 54 from falling off, and the countersunk hole 623 prevents the head of the second fixed shaft 67 from protruding to prevent interference with the first telescopic block 61.

[0036] The use principle of the utility model is now described as follows:

[0037] When the cabinet door 2 is opened, the second hinge 4 moves toward the first hinge 3 in a rotational motion, and the distance between the second hinge 4 and the first hinge 3 is shortened. The switching force pushes the movable block 52 to move in the direction of the limit block 35 through the telescopic buffer assembly 6. The first spring 51 is compressed by the movable block 52, so that the first spring 51 stores energy and absorbs the switching force and impact force until the movable block 52 abuts against the limit block 35. At this time, the extension block 621 moves toward the other end of the limit groove 611, and the third spring 64 is compressed by the top plate 65, so that the third spring 64 stores energy and absorbs the switching force and impact force. The second spring 63 releases the reaction force to quickly push the extension block 621 to move to prevent interference. Until the extension block 621 abuts against the limit groove 611, the cabinet door 2 is opened.

[0038] When the cabinet door 2 is closed, the second hinge 4 leaves the first hinge 3 in a rotational motion, and the distance between the second hinge 4 and the first hinge 3 is lengthened. The support block 41 pulls the movable block 52 to move toward the opposite surface of the cavity 31 through the telescopic buffer assembly 6, and the first spring 51 releases a reaction force to the movable block 52 to reduce the force required for closing the door until the movable block 52 abuts against the opposite surface of the cavity 31. The extension block 621 moves toward the other end surface of the limiting groove 611 and drives the top plate 65 away from the baffle 616. The third spring 64 releases a reaction force to the baffle 616 to reduce the force required for closing the door. The second spring 63 is compressed by the extension plate to absorb and reduce the impact force of the extension block 621 and the limiting groove 611.

[0039] The above design scheme can enable the product to have the advantages of buffering function and increasing the service life of the hinge.

[0040] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A hinge with a buffering function for a low-voltage cabinet door, comprising a first hinge (3) and a second hinge (4), wherein the first hinge (3) is fixed to a cabinet body (1), the second hinge (4) is fixed to a cabinet door (2), and the first hinge (3) is hinged to the second hinge (4), characterized in that: The first hinge (3) is provided with a buffer device (5) for buffering the impact force generated by the rotation of the second hinge (4); The buffer device (5) comprises a first spring (51) and a movable block (52); the movable block (52) is provided with first through holes (53) on both sides and is arranged on a first guide column (34); the first spring (51) is arranged on the outer wall of the first guide column (34) and abuts against the end surface of the first blind hole (33) and the movable block (52), so that the movable block (52) abuts against the back surface of the concave cavity (31); the movable block (52) is provided with at least two connecting blocks (54) and passes through the avoidance through hole (71); the connecting block (54) is provided with a third through hole (55); The second hinge (4) is provided with a support block (41), and a telescopic buffer assembly (6) is provided between the support block (41) and the buffer device (5), for buffering the impact force generated by the rotation of the second hinge (4) through telescopic movement.

2. The hinge with buffer function for low-voltage cabinet door according to claim 1, characterized in that: The first hinge (3) is provided with at least two concave cavities (31), first blind holes (33) are provided on both sides of the concave cavity (31), a first guide column (34) is provided between the first blind hole (33) and the opposite surface of the concave cavity (31), a limit block (35) is provided between the first blind holes (33), a chamfer (36) is provided at the top of the opposite surface of the concave cavity (31), an end cover (7) is provided at the top of the concave cavity (31), and the end cover (7) is provided with a position avoidance through hole (71).

3. The hinge with buffering function for low-voltage cabinet door according to claim 1, characterized in that: The support block (41) is provided with a second through hole (42), the support block (41) is provided with a reinforcing rib (43), and the first hinge (3) and the second hinge (4) are provided with a plurality of mounting holes (8).

4. The hinge with buffer function for low-voltage cabinet door according to claim 1, characterized in that: The telescopic buffer assembly (6) comprises a first telescopic block (61), a second telescopic block (62), a second spring (63), and a third spring (64); the two side walls of the first telescopic block (61) are provided with limiting grooves (611); the end surface of the limiting groove (611) is provided with a second blind hole (612); a second guide column (613) is provided between the second blind hole (612) and the end surface of the limiting groove (611); a clearance groove (614) is provided between the limiting grooves (611); the second telescopic block (62) is arranged on both sides of the first telescopic block (61); the second telescopic block (62) is provided with an extension block (614); 21), the extension block (621) is provided with a third through hole (55) and is arranged on the second guide column (613), the second spring (63) is arranged on the outer wall of the second guide column (613) and abuts against the end surface of the second blind hole (612) and the extension block (621), a top plate (65) is arranged between the extension blocks (621), a third guide column (615) is arranged at the center of the clearance groove (614) and passes through the top plate (65), a baffle (616) is arranged at one end of the third guide column (615), and the third spring (64) is arranged on the outer wall of the third guide column (615) and abuts against the baffle (616) and the top plate (65).

5. The hinge with buffer function for low-voltage cabinet door according to claim 4, characterized in that: The first telescopic block (61) is provided with a first hinged through hole (617) and is hinged to the second through hole (42); the second telescopic block (62) is provided with a second hinged through hole (622) and is hinged to the third through hole (55); the second hinged through hole (622) is provided with a countersunk hole (623); the first hinged through hole (617) is provided with a first fixed shaft (66); the second hinged through hole (622) is provided with a second fixed shaft (67); the head of the second fixed shaft (67) is arranged in the countersunk hole (623) and is flush with the surface of the second telescopic block (62).

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