A central pivot device for folding a steel frame

Abstract

The utility model relates to the technical field of steel structure frame especially is related to a central pivot device for folding steel frame, it includes center frame, the center frame includes fixed plate no.

Description

Technical Field

[0001] This utility model relates to the technical field of steel structure frames, and in particular to a central pivot device for folding steel frames. Background Technology

[0002] Foldable steel frame structures are used in temporary housing, mobile and collapsible housing, and other scenarios where the housing often needs to be foldable and collapsible to optimize transportation, improve storage efficiency, and make reasonable use of space.

[0003] However, most existing folding house folding mechanisms use hinges as the folding connection, and hinge connections have the following drawbacks: (1) Insufficient structural stability and load-bearing capacity: single-point stress, weak shear and torsional resistance; low connection stiffness, prone to swaying and displacement.

[0004] (2) Poor durability and susceptible to environmental and wear effects: metal parts are prone to rust and have a short service life; rotating parts wear out quickly and folding smoothness deteriorates rapidly.

[0005] (3) Poor compatibility with foldable steel frame houses: Hinges are mostly used in furniture, machinery and other fields. There are no special damping hinges that can meet the force transmission requirements of houses. The anti-corrosion process of steel frame can achieve 5-10 years of outdoor corrosion resistance, but the corrosion resistance life of hinges is usually only 1-2 years, which is much shorter than the life of steel frame. Utility Model Content

[0006] In order to solve the problems existing in the prior art, the present invention provides a central pivot device for folding steel frames.

[0007] The central pivot device for folding steel frames provided by this utility model adopts the following technical solution: A central pivot device for a folding steel frame includes a central frame, which includes a first fixed plate and a second fixed plate arranged in parallel. A bearing seat fixed to a steel beam is provided between the first fixed plate and the second fixed plate. A gap is provided between the bearing seat and the first and second fixed plates. A pin is passed through the first fixed plate, the second fixed plate, and the bearing seat. The pin includes a baffle portion and a rod portion. The baffle portion is attached to the outside of the first fixed plate. A limiting member for restricting the axial movement of the pin is provided at the end of the rod portion. Bearings are respectively interference-fitted at both ends of the rod portion. An installation groove for installing the bearing is provided in the bearing seat. A positioning component for restricting accidental rotation of the steel beam is also provided between the central frame and the steel beam.

[0008] By adopting the above technical solution, the central rotating shaft device of this utility model embodiment can realize the rotation of the steel beam around the shaft. During rotation, a rotation gap is reserved at the top and bottom of the bearing seat to reduce the frictional resistance of the steel beam when rotating around the shaft and improve the smoothness of folding. Through the fixed connection between the bearing seat and the steel beam, the rotational support of the pin shaft, and the coordinated fixation of multiple components, the stable folding of the steel frame is realized. The device as a whole has durability, corrosion resistance and good load-bearing capacity, and is suitable for steel frame application scenarios that require flexible adjustment of form, such as temporary construction structures and equipment storage frames.

[0009] Preferably, the pin also includes a boss portion disposed between the baffle portion and the rod portion, the boss portion passing through the first fixing plate, the inner ring of the bearing near the boss portion being supported on the boss portion, and a spacer ring being supported between the inner ring of the bearing away from the boss portion and the second fixing plate.

[0010] By adopting the above technical solution, using the boss and spacer ring, the bearing position is more stable.

[0011] Preferably, a limiting groove is provided adjacent to the outer side of the mounting groove. The inner diameter of the limiting groove is larger than the inner diameter of the mounting groove, and an elastic washer for supporting the outer ring of the bearing is installed in the limiting groove.

[0012] By adopting the above technical solutions, the stability of the bearings has been further improved.

[0013] Preferably, an inner support tube is fitted onto the rod body, and the inner support tube is supported between the inner rings of the two bearings.

[0014] By adopting the above technical solution, the inner support tube improves the overall rigidity of the bearing housing.

[0015] Preferably, the end of the rod body is provided with a slot and passes through the second fixing plate, and the limiting member is a detachable card plate inserted into the slot.

[0016] By adopting the above technical solution, the card plate is inserted into the card slot to restrict the axial movement of the pin, and the card plate is easy to use.

[0017] Preferably, the card plate is fixed to the second fixing plate by bolts, and washers are installed on the bolts.

[0018] By adopting the above technical solution, the clamping plate is fixed with bolts, which forms a double constraint on the pin and ensures that the pin cannot move axially.

[0019] Preferably, the central frame further includes a central tube vertically fixed to the center of the first fixing plate, a second fixing plate sleeved and fixed to the central tube, and a rib plate fixed between the side of the second fixing plate away from the first fixing plate and the outer wall of the central tube.

[0020] Preferably, the positioning component includes a pin installed between the center frame and the steel beam. Attached Figure Description

[0021] Figure 1 This is a top view of the central pivot device for folding steel frames according to an embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional view of the central pivot device for folding steel frames according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.

[0024] Figure 4 This is a structural schematic diagram of the bearing housing according to an embodiment of the present utility model.

[0025] Figure 5 This is a schematic diagram of the pin structure according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the card plate according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Center frame; 10. Fixing plate one; 11. Center tube; 12. Fixing plate two; 13. Rib plate; 2. Steel beam; 3. Bearing seat; 30. Mounting groove; 31. Limiting groove; 4. Pin; 40. Baffle part; 41. Boss part; 42. Rod body part; 420. Slot; 5. Inner support tube; 6. Bearing; 7. Elastic washer; 8. Spacer ring; 9. Clamping plate; 90. Bolt; 91. Washer. Detailed Implementation

[0028] The following combination Figures 1-6 The present invention will be described in further detail below.

[0029] This utility model discloses a central pivot device for a folding steel frame. (Refer to...) Figures 1-6 A central pivot device for folding steel frames is made of high-strength steel and includes a central frame 1. The central frame 1 includes a fixed plate 10 in the shape of a regular hexagon. A central tube 11 is vertically fixed to the center of one side of the fixed plate 10. A fixed plate 12 is sleeved and fixed to the central tube 11. The fixed plate 12 is in the shape of a regular hexagon and has a gap between it and the fixed plate 10. A plurality of ribs 13 are fixed between the side of the fixed plate 12 away from the fixed plate 10 and the outer wall of the central tube 11. The plurality of ribs 13 are evenly arranged around the central tube 11.

[0030] Multiple steel beams 2 are arranged around the central tube 11. One end of the steel beam 2 is located in the gap between the first fixed plate 10 and the second fixed plate 12, and a tubular bearing seat 3 is fixed to this end. The bearing seat 3 has a through hole along the axial direction inside. The bearing seat 3 is arranged parallel to the central tube 11. The two ends of the bearing seat 3 are provided with an installation groove 30 and a limiting groove 31 from the inside to the outside. The inner diameter of the installation groove 30 is larger than the inner diameter of the through hole and smaller than the inner diameter of the limiting groove 31. The installation groove 30 and the limiting groove 31 are arranged adjacent to each other.

[0031] A pin 4 is installed inside the bearing housing 3. The pin 4 includes a baffle portion 40, a boss portion 41, and a rod portion 42 arranged in sequence. The baffle portion 40 is in the shape of a circular plate, the boss portion 41 is in the shape of a cylinder and its outer diameter is smaller than that of the baffle portion 40, and the rod portion 42 is in the shape of a circular rod and its outer diameter is smaller than that of the boss portion 41. A groove 420 is provided on the peripheral wall of the end of the rod portion 42 away from the boss portion 41. The rod portion 42 passes through the second fixing plate 12, the boss portion 41 passes through the first fixing plate 10, and the baffle portion 40 is attached to the side of the first fixing plate 10 away from the bearing housing 3.

[0032] An inner support tube 5 is fitted on the outer side of the shaft 42. The inner support tube 5 enhances the overall structural rigidity of the bearing seat 3. Bearings 6 are respectively interference-fitted at both ends of the shaft 42. The outer ring of the bearing 6 is interference-fitted in the mounting groove 30. The inner support tube 5 is supported between the inner rings of the two bearings 6. An elastic washer 7 is installed in the limiting groove 31 to support the outer ring of the bearing 6, thereby limiting the movement of the bearing 6 and the inner support tube 5. The inner ring of the bearing 6 near the boss 41 abuts against the boss 41. The inner ring of the bearing 6 away from the boss 41 is supported between the inner ring of the bearing 6 and the fixing plate 12 by a spacer ring 8. The spacer ring 8 is fitted on the outer side of the shaft 42.

[0033] A retaining plate 9 that mates with a slot 420 is provided on the side of the second fixing plate 12 away from the first fixing plate 10. In this embodiment, the retaining plate 9 is used as a limiting component to restrict the axial movement of the pin 4. The retaining plate 9 is detachably inserted into the slot 420 to cooperate with the baffle part 40 to restrict the axial movement of the pin 4. The retaining plate 9 is fixed to the second fixing plate 12 by two bolts 90, and washers 91 for dispersing stress are sleeved on the bolts 90. After the steel beam 2 is rotated into position, the steel beam 2 can be fixed to the second fixing plate 12 by positioning components such as pins to lock the rotation angle and prevent the steel beam 2 from rotating accidentally. Different positioning components can also be used in other embodiments.

[0034] The implementation principle of the central pivot device for folding steel frame in this embodiment of the utility model is as follows: the central frame 1 serves as the base of the device, and the pin 4 is precisely fixed in the preset position of the central frame 1 by the clamping plate 9. The clamping plate 9 is inserted into the clamping groove 420 and fixed by the bolt 90 and the washer 91, forming a double constraint on the pin 4 to ensure that the pin 4 cannot move axially.

[0035] The bearing housing 3 is fixedly connected to the steel beam 2. Bearings 6 are press-fitted at both ends of the bearing housing 3. The inner ring of the bearing 6 is interference-fitted with the pin 4, and the outer ring of the bearing 6 is interference-fitted with the bearing housing 3, forming a low-friction rotating pair. This reduces the coefficient of friction of the steel beam 2 when it rotates around the pin 4 to 0.001-0.003, and reduces the folding operation force by more than 60%.

[0036] When the external force drives the steel beam 2, the steel beam 2 drives the bearing seat 3 to rotate around the axis of the pin shaft 4. The inner support tube 5 is limited by the inner ring of the bearing 6 and the elastic washer 7 to prevent the inner support tube 5 from moving, thus achieving stable folding of the steel frame. After folding into place, the rotation angle can be locked by additional positioning components (such as pins) to prevent the steel beam 2 from rotating accidentally.

[0037] The central rotating shaft device of this utility model embodiment can realize the rotation of the steel beam 2 around the axis. During rotation, the top and bottom of the bearing seat 3 are reserved for rotation, which reduces the frictional resistance of the steel beam 2 when rotating around the axis and improves the smoothness of folding. Through the fixed connection between the bearing seat 3 and the steel beam 2, the rotational support of the pin 4, and the coordinated fixation of multiple components, the stable folding of the steel frame is realized. The device as a whole has durability, corrosion resistance and good load-bearing capacity, and is suitable for steel frame application scenarios that require flexible adjustment of form, such as temporary construction structures and equipment storage frames.

[0038] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A central pivot device for folding steel frames, characterized in that: The structure includes a central frame (1), which includes a first fixed plate (10) and a second fixed plate (12) arranged in parallel. A bearing seat (3) fixed to the steel beam (2) is provided between the first fixed plate (10) and the second fixed plate (12). A gap is provided between the bearing seat (3) and the first fixed plate (10) and the second fixed plate (12). A pin (4) passes through the first fixed plate (10), the second fixed plate (12) and the bearing seat (3). The pin (4) includes a stop. The plate part (40) and the rod body part (42) are attached to the outside of the fixed plate (10). The end of the rod body part (42) is provided with a limiting member for restricting the axial movement of the pin (4). The two ends of the rod body part (42) are respectively interference-fitted with bearings (6). The bearing seat (3) is provided with a mounting groove (30) for installing the bearing (6). A positioning component for restricting the accidental rotation of the steel beam (2) is also provided between the center frame (1) and the steel beam (2).

2. The central pivot device for folding steel frames according to claim 1, characterized in that: The pin (4) also includes a boss (41) disposed between the baffle (40) and the rod (42). The boss (41) passes through the first fixing plate (10). The inner ring of the bearing (6) near the boss (41) is supported on the boss (41). The inner ring of the bearing (6) away from the boss (41) is supported between the second fixing plate (12) and the spacer (8).

3. The central pivot device for folding steel frames according to claim 2, characterized in that: A limiting groove (31) is provided adjacent to the outside of the mounting groove (30). The inner diameter of the limiting groove (31) is larger than the inner diameter of the mounting groove (30). An elastic washer (7) for supporting the outer ring of the bearing (6) is installed in the limiting groove (31).

4. The central pivot device for folding steel frames according to claim 3, characterized in that: An inner support tube (5) is fitted on the rod body (42), and the inner support tube (5) is supported between the inner rings of the two bearings (6).

5. The central pivot device for folding steel frames according to any one of claims 1-4, characterized in that: The end of the rod body (42) is provided with a slot (420) and passes through the second fixing plate (12). The limiting member is a card plate (9) that can be detachably inserted into the slot (420).

6. The central pivot device for a folding steel frame according to claim 5, characterized in that: The card plate (9) is fixed to the fixing plate 2 (12) by bolts (90), and washers (91) are installed on the bolts (90).

7. The central pivot device for folding steel frames according to claim 1, characterized in that: The central frame (1) also includes a central tube (11) that is vertically fixed to the center of the first fixed plate (10), and a second fixed plate (12) that is sleeved and fixed to the central tube (11). A rib (13) is fixed between the side of the second fixed plate (12) away from the first fixed plate (10) and the outer wall of the central tube (11).

8. The central pivot device for folding steel frames according to claim 1, characterized in that: The positioning component includes a pin installed between the center frame (1) and the steel beam (2).

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