Oil-free silent fireproof bearing and hinge comprising same

Abstract

The utility model relates to an oil-free mute type fireproof bearing which comprises a shaft core and bearing assemblies which are sleeved on the shaft core and are symmetrically arranged, the bearing assembly is assembled between the first bearing sleeve and the second bearing sleeve; the shaft core is sleeved with a supporting piece. The supporting piece is located between the two bearing assemblies. The bearing assembly comprises a bearing positioning seat, a rotating piece and a positioning piece which are arranged in sequence; one end of the positioning piece abuts against the rotating piece, the other end of the positioning piece abuts against the supporting piece, and the positioning piece and the supporting piece are both connected to the inner side of the second bearing sleeve in a sleeving mode; the bearing positioning seat is attached to the rotating piece and is sleeved with the rotating piece through the shell; the bearing positioning device is simple in structure and ingenious in design, and the bearing positioning seat is attached to the rotating piece and connected with the rotating piece in a sleeved mode through the shell; the bearing, the first bearing sleeve and the second bearing sleeve are in the rotating process; and the rotation noise is effectively reduced, and the rotation smoothness is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology, specifically relating to an oil-free, silent, fireproof bearing and a hinge containing the bearing. Background Technology

[0002] Bearings are widely used in daily life as a type of hinge, typically connecting the sash and frame of doors and windows, and are a major component of door and window hardware. In engineering door and window installations, the frame and sash are usually separated and then reassembled, requiring the connection through bearings; insert-type bearings need to be secured to the hinge to prevent them from falling off.

[0003] Traditional hinges use resistance oil or plastic bearings. When a fire breaks out, the plastic bearings melt, the hinges fall apart, and the door gets stuck and cannot be opened, thus failing to achieve the purpose of fire prevention. In addition, traditional fireproof hinges open and close stiffly, noisily, and are not smooth. The rotation of the bearings and the sleeves on the hinges produces rotational noise, resulting in poor smoothness of rotation, which causes inconvenience to use and affects the service life.

[0004] Therefore, improvements are needed to address the aforementioned technical issues. Utility Model Content

[0005] The present invention aims to overcome the defects in the prior art and provide an oil-free silent fireproof bearing with a simple and reasonable structure, ingenious design, quiet and smooth rotation, and improved fire resistance, as well as a hinge containing the bearing.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: an oil-free, silent, fireproof bearing, comprising a shaft core and bearing assemblies symmetrically arranged and sleeved on the shaft core; the bearing assemblies are assembled between a first bearing sleeve and a second bearing sleeve; a support member is sleeved on the shaft core; the support member is located between the two bearing assemblies; the bearing assembly includes a bearing positioning seat, a rotating member, and a positioning member arranged sequentially; one end of the positioning member abuts against the rotating member, and the other end abuts against the support member; both the positioning member and the support member are sleeved on the inner side of the second bearing sleeve; the bearing positioning seat fits against the rotating member and is connected by a housing.

[0007] In a preferred embodiment of this utility model, the bearing positioning seat includes a guide part, a limiting part, and a connecting part; the guide part, the limiting part, and the connecting part are fixedly connected and integrally formed.

[0008] In a preferred embodiment of this utility model, the end of the guide portion has a rounded transition structure.

[0009] In a preferred embodiment of this utility model, the connecting part has an inner groove on the side near the rotating part, and correspondingly, the rotating part has a protrusion on the side near the connecting part. When the rotating part is assembled to the connecting part, the protrusion is fitted into the inner groove.

[0010] In a preferred embodiment of this utility model, the end of the first bearing sleeve is fitted with a T-shaped end cap; the end cap includes a connecting plate and a first positioning member; the first positioning member extends into the first bearing sleeve, and the connecting plate abuts against the first bearing sleeve.

[0011] In a preferred embodiment of the present invention, a positioning groove for inserting a shaft core is formed in the first positioning member, and a guide slope is formed at the end of the first positioning member.

[0012] A hinge includes an oil-free, silent, fire-resistant bearing, a fixed leaf and a door leaf respectively rotatably connected to the oil-free, silent, fire-resistant bearing; a first bearing sleeve is assembled on the fixed leaf, and a second bearing sleeve is assembled on the door leaf; wherein, the hinge is a male-female hinge or a door closer hinge.

[0013] In a preferred embodiment of this utility model, the support member is provided with a limiting groove, which is arranged in a ring on the support member. Correspondingly, the second bearing sleeve is provided with a limiting through hole corresponding to the position of the limiting groove, and a limiting bolt is installed on the limiting through hole. The limiting bolt passes through the limiting through hole and abuts against the limiting groove.

[0014] In a preferred embodiment of this utility model, the limiting groove is located in the middle of the support member.

[0015] In a preferred embodiment of this utility model, the limiting bolt is assembled in the limiting groove, and the upper end face of the limiting bolt is on the same horizontal plane as the second bearing sleeve.

[0016] In a preferred embodiment of this utility model, the support member, the end cap, the limiting bolt, the shaft core, the first bearing sleeve, the fixing leaf, the door leaf, and the second bearing sleeve are all made of metal.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model has a simple structure and ingenious design. The bearing positioning seat fits into the rotating part and is connected by a shell. This effectively reduces rotational noise and ensures smooth rotation during the rotation of the bearing, the first bearing sleeve, and the second bearing sleeve. A support is sleeved on the shaft core, and both the positioning and support are sleeved on the inner side of the second bearing sleeve. This gives the bearing the functions of quiet operation, wear resistance, fire resistance, and smooth operation.

[0019] 2. This utility model has a clever design. An inner groove is formed on the side of the connecting part near the rotating part, and correspondingly, a protrusion is formed on the side of the rotating part near the connecting part. When the rotating part is assembled with the connecting part, the protrusion fits into the inner groove. The assembly structure between the protrusion and the inner groove changes the rotational force surface between the connecting part and the rotating part, making it more wear-resistant and pressure-resistant. The force surface is mainly concentrated on the protrusion. The larger the force area, the smaller the pressure, and the higher the overall assembly stability.

[0020] 3. This utility model provides a limiting groove on the support member, and a limiting bolt passes through the limiting through hole and abuts against the limiting groove. The limiting bolt and the limiting groove are engaged with each other, and its function is to prevent the fixed blade from moving along the length direction of the shaft core.

[0021] 4. The support component, end cap, limit bolt, shaft core, first bearing sleeve, fixing leaf, door leaf, and second bearing sleeve of this utility model are all made of metal. When a fire occurs, the other plastic parts of the hinge melt, but the above-mentioned components made of metal will not deform or shift, and will continue to act as the shaft core for hinge rotation. The door can also continue to open and close, thus serving as a fireproof and silent hinge. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the oil-free silent fireproof bearing of this utility model;

[0023] Figure 2 This is an exploded view of the structure of the oil-free silent fireproof bearing according to an embodiment of this utility model;

[0024] Figure 3 This is an exploded view of the bearing assembly according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the rotating component according to an embodiment of the present invention;

[0026] Figure 5 This is an exploded view of the door latch structure according to an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the door latch structure according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the letter hinge structure according to an embodiment of the present invention;

[0029] The attached figures are labeled as follows: 1. Oil-free silent fireproof bearing; 2. Fixed leaf; 2-2. First bearing sleeve; 3. Door leaf; 3-3. Second bearing sleeve; 4. Protrusion; 5. Inner groove; 6. Support; 7. End cap; 8. Limiting groove; 9. Limiting through hole; 10. Limiting bolt; 11. Mother leaf; 12. Daughter leaf; 30. Shaft core; 31. Bearing assembly; 32. Positioning component; 40. Bearing positioning seat; 41. Guide part; 42. Limiting part; 43. Connecting part; 44. Outer shell; 45. Rotating component; 70. Connecting plate; 71. First positioning component; 72. Positioning groove; 73. Guide slope. Detailed Implementation

[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Example

[0031] like Figures 1-4 As shown, the oil-free silent fireproof bearing includes a shaft core 30 and bearing assemblies 31 symmetrically arranged and sleeved on the shaft core 30; the bearing assemblies 31 are assembled between a first bearing sleeve 2-2 and a second bearing sleeve 3-3; a support member 6 is sleeved on the shaft core 30; the support member 6 is located between the two bearing assemblies 31; the bearing assembly 31 includes a bearing positioning seat 40, a rotating member 45, and a positioning member 32 arranged sequentially; one end of the positioning member 32 abuts against the rotating member 45, and the other end abuts against the support member 6; both the positioning member 32 and the support member 6 are sleeved on the second bearing sleeve. The inner side of 3-3; the bearing positioning seat 40 is in contact with the rotating part 45 and is connected by the outer shell 44; the structure of this utility model is simple and ingeniously designed. The bearing positioning seat 40 is in contact with the rotating part 45 and is connected by the outer shell 44; so that the bearing and the first bearing sleeve 2-2 and the second bearing sleeve 3-3 can effectively reduce the rotation noise and ensure the smoothness of rotation during rotation; a support member 6 is sleeved on the shaft core 30, and both the positioning member 32 and the support member 6 are sleeved on the inner side of the second bearing sleeve 3-3; so that the bearing has the functions of quietness, wear resistance, fire resistance and smoothness.

[0032] The bearing positioning seat 40 includes a guide part 41, a limiting part 42, and a connecting part 43; the guide part 41, the limiting part 42, and the connecting part 43 are fixedly connected and integrally formed; this improves the structural strength and overall robustness of the entire bearing positioning seat 40, further ensuring safe use; the end of the guide part 41 has a rounded transition structure, which facilitates the insertion of the first bearing sleeve 2-2 into the bearing positioning seat 40, improving the assembly efficiency between the two.

[0033] A groove 5 is formed on the side of the connecting part 43 near the rotating part 45. Correspondingly, a protrusion 4 is formed on the side of the rotating part 45 near the connecting part 43. When the rotating part 45 is assembled with the connecting part 43, the protrusion 4 fits into the groove 5. This utility model is ingeniously designed. By setting the groove 5 and the protrusion 4 to cooperate with each other, the assembly structure between the protrusion and the groove changes the rotational force surface between the connecting part and the rotating part, making it more wear-resistant and pressure-resistant. The force surface is mainly concentrated on the protrusion. The larger the force area, the smaller the pressure, and the higher the overall assembly stability.

[0034] The end of the first bearing sleeve 2-2 is fitted with a T-shaped end cap 7; the end cap 7 includes a connecting plate 70 and a first positioning member 71; the first positioning member 71 extends into the first bearing sleeve 2-2, and the connecting plate 70 abuts against the first bearing sleeve 2-2; a positioning groove 72 for inserting the shaft core 30 is formed in the first positioning member 71, and the end cap 7 plays a protective and limiting role for the shaft core 30; a guide slope 73 is formed at the end of the first positioning member 71, which facilitates the insertion of the first positioning member 71 into the first bearing sleeve 2-2 and improves the assembly efficiency between the two.

[0035] like Figures 5-6 As shown, Figure 5 This is an exploded view of the door latch structure according to an embodiment of this utility model; Figure 6 This is a schematic diagram of the door closer hinge structure according to an embodiment of the present invention; a hinge includes an oil-free silent fireproof bearing 1, a fixed leaf 2 and a door leaf 3 respectively rotatably connected to the oil-free silent fireproof bearing 1; a first bearing sleeve 2-2 is assembled on the fixed leaf 2, and a second bearing sleeve 3-3 is assembled on the door leaf 3; wherein, in this embodiment, the hinge is a door closer hinge.

[0036] The support member 6 is provided with a limiting groove 8, which is arranged in a ring on the support member 6. Correspondingly, the second bearing sleeve 3-3 is provided with a limiting through hole 9 corresponding to the position of the limiting groove 8. A limiting bolt 10 is installed on the limiting through hole 9. The limiting bolt 10 passes through the limiting through hole 9 and abuts against the limiting groove 8. Specifically, the limiting groove 8 is located in the middle of the support member 6. This utility model provides a limiting groove 8 on the support member, and the limiting bolt 10 passes through the limiting through hole 9 and abuts against the limiting groove 8. The limiting bolt 10 and the limiting groove 8 are engaged with each other, and its function is to prevent the fixed blade from moving along the length direction of the shaft core.

[0037] The limiting bolt 10 is assembled in the limiting groove 8, and the upper end face of the limiting bolt 10 is on the same horizontal plane as the second bearing sleeve 3-3; this improves the overall aesthetics of the hinge.

[0038] Support component 6, end cap 7, limit bolt 10, shaft core 30, first bearing sleeve 2-2, fixing leaf 2, door leaf 3, and second bearing sleeve 3-3 are all made of metal. When a fire occurs, the other plastic parts of the hinge melt, but the above-mentioned components made of metal will not deform or shift, and will continue to act as the shaft core for hinge rotation. The door can continue to open and close, thus serving as a fireproof and silent hinge.

[0039] like Figure 7 As shown, Figure 7 This is a schematic diagram of the letter hinge structure according to an embodiment of the present invention; specifically, it refers to: a hinge, including an oil-free silent fireproof bearing 1, a mother leaf 11 and a daughter leaf 12 respectively rotatably connected to the oil-free silent fireproof bearing; a first bearing sleeve 2-2 is assembled on the mother leaf 11, and a second bearing sleeve 3-3 is assembled on the daughter leaf 12; wherein, the hinge in this embodiment is a mother-daughter hinge.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0041] Although this document uses numerous reference numerals from the accompanying drawings, such as: oil-free silent fireproof bearing 1, fixed leaf 2, first bearing sleeve 2-2, door leaf 3, second bearing sleeve 3-3, protrusion 4, inner groove 5, support 6, blind end 7, limiting groove 8, limiting through hole 9, limiting bolt 10, mother leaf 11, daughter leaf 12, shaft core 30, bearing assembly 31, positioning element 32, bearing positioning seat 40, guide part 41, limiting part 42, connecting part 43, outer shell 44, rotating part 45, connecting plate 70, first positioning element 71, positioning groove 72, guide slope 73, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An oil-free, silent, fire-resistant bearing, comprising a shaft core (30) and bearing assemblies (31) sleeved on the shaft core (30) and symmetrically arranged; the bearing assembly (31) is assembled between a first bearing sleeve (2-2) and a second bearing sleeve (3-3); characterized in that: A support member (6) is sleeved on the shaft core (30); the support member (6) is located between the two bearing assemblies (31); the bearing assembly (31) includes a bearing positioning seat (40), a rotating member (45) and a positioning member (32) arranged in sequence; one end of the positioning member (32) abuts against the rotating member (45) and the other end abuts against the support member (6), and both the positioning member (32) and the support member (6) are sleeved on the inner side of the second bearing sleeve (3-3); the bearing positioning seat (40) is in contact with the rotating member (45) and is sleeved through the outer shell (44).

2. The oil-free silent fireproof bearing according to claim 1, characterized in that: The bearing positioning seat (40) includes a guide part (41), a limiting part (42) and a connecting part (43); the guide part (41), the limiting part (42) and the connecting part (43) are fixedly connected and integrally formed.

3. The oil-free silent fireproof bearing according to claim 2, characterized in that: The connecting part (43) has an inner groove (5) on the side near the rotating part (45). Correspondingly, the rotating part (45) has a protrusion (4) on the side near the connecting part (43). When the rotating part (45) is assembled into the connecting part (43), the protrusion (4) fits into the inner groove (5).

4. The oil-free silent fireproof bearing according to claim 1, characterized in that: The end of the first bearing sleeve (2-2) is fitted with a T-shaped end cap (7); the end cap (7) includes a connecting plate (70) and a first positioning member (71); the first positioning member (71) extends into the first bearing sleeve (2-2), and the connecting plate (70) abuts against the first bearing sleeve (2-2).

5. The oil-free silent fireproof bearing according to claim 4, characterized in that: The first positioning member (71) has a positioning groove (72) for inserting the shaft core (30), and the end of the first positioning member (71) has a guide slope (73).

6. A hinge, characterized in that: The hinge includes the oil-free silent fireproof bearing (1) as described in any one of claims 1-5, a fixed leaf (2) and a door leaf (3) respectively rotatably connected to the oil-free silent fireproof bearing (1); a first bearing sleeve (2-2) is assembled on the fixed leaf (2), and a second bearing sleeve (3-3) is assembled on the door leaf (3); wherein the hinge is a male-female hinge or a door suction hinge.

7. A hinge according to claim 6, characterized in that: The support member (6) is provided with a limiting groove (8), which is arranged in a ring on the support member (6). Correspondingly, the second bearing sleeve (3-3) is provided with a limiting through hole (9) corresponding to the position of the limiting groove (8). A limiting bolt (10) is installed on the limiting through hole (9). The limiting bolt (10) passes through the limiting through hole (9) and abuts against the limiting groove (8).

8. A hinge according to claim 7, characterized in that: The limiting groove (8) is located in the middle of the support member (6).

9. A hinge according to claim 7, characterized in that: The limiting bolt (10) is assembled in the limiting groove (8), and the upper end face of the limiting bolt (10) is on the same horizontal plane as the second bearing sleeve (3-3).

10. A hinge according to claim 7, characterized in that: The support (6), the end cap (7), the limiting bolt (10), the shaft core (30), the first bearing sleeve (2-2), the fixing leaf (2), the door leaf (3), and the second bearing sleeve (3-3) are all made of metal.

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