Adjustable crane span structure slewing bearing device

Abstract

The utility model discloses an adjustable crane span structure slewing bearing device which comprises an air cylinder, a transition plate and a fixing base. The output end of the air cylinder is connected with a connecting rod, one end of the connecting rod is connected to one side of a transition plate, a screw A is arranged on one side of the transition plate, and a nut is arranged on one side of the screw A; the nut is driven by the handle to rotate, the internal thread is formed in one side of the nut, the external thread is formed on the surface of the screw A, the external thread is formed in the other side of the nut, the internal thread is formed on the surface of the screw B, the internal thread and the external thread are matched and screwed with each other, left-hand thread rotation and right-hand thread rotation are formed, and the purpose of expanding and contracting the flexible rotary body is achieved. Under the cooperative use of the spherical washer and the conical washer, movement can be prevented, slipping is avoided in the screwing process, use is convenient and reliable, the device is suitable for gas turbines and large-size flexible revolved bodies of steam turbines of various models and specifications, the production cycle is shortened, the working efficiency is improved, and size matching can be achieved according to different product sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge frame rotation, in particular to an adjustable bridge frame rotation support device. Background Art

[0002] There are some cross-bridge type rotating bodies in the exhaust cylinder of heavy-duty gas turbines and the low-pressure outer cylinder of thermal power plants. These components are huge in size and have poor rigidity, and are prone to deformation during lifting, processing and transportation.

[0003] In existing technologies, when a flexible slewing body needs to be expanded and contracted, bolts must be tightened sequentially to expand and contract the slewing body. However, this adjustment requires tightening one side first, then the other side, making the operation more cumbersome and preventing simultaneous expansion and contraction. Furthermore, tightening the bolts may cause movement and slippage, making it inconvenient to use and reducing work efficiency. In light of this, we have developed an adjustable bridge slewing bearing device. Utility Model Content

[0004] The purpose of the present utility model is to provide an adjustable bridge slewing bearing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable bridge slewing bearing device, comprising: a cylinder, a transition plate and a fixing seat;

[0006] The output end of the cylinder is connected to a connecting rod, and the connecting rod and the output end of the cylinder are connected by a bolt. One end of the connecting rod is connected to one side of the transition plate, and the connecting rod and the transition plate are fixed. A screw A is provided on one side of the transition plate, and a nut is provided on one side of the screw A. An adjustment mechanism is provided on the surface of the nut. The handle of the adjustment mechanism drives the nut, the fixed block and the screw B to rotate, so that the screw A and the screw B rotate to form a flexible rotating body that can be expanded and contracted.

[0007] Preferably, the adjustment mechanism includes a cavity opened inside the nut, and the cavity and the nut are integrally formed. The screw A is screwed on one side of the nut, and the screw B is screwed on the other side of the nut. The handle is connected to the surface of the nut, and the fixed block is connected to the other side of the nut and is located on the inner side of the screw B.

[0008] Preferably, an anti-movement mechanism is provided on one side of the screw rod B, and the screw rod B is fixed by using a spherical washer and a conical washer of the anti-movement mechanism together.

[0009] Preferably, the anti-movement mechanism includes a screw C on one side of the screw B, one side of the screw C is connected to a side plate, the conical washer is sleeved on the surface of the screw C on one side of the side plate, and the spherical washer is sleeved on the surface of the screw C on one side of the conical washer. The combined use of the spherical washer and the conical washer can avoid slipping during the screwing process.

[0010] Preferably, a connecting plate is connected to one side of the fixing seat, a waist-shaped hole is provided on one side of the fixing seat, and a side plate groove for fixing the side plate is provided inside the fixing seat.

[0011] Compared with the prior art, the present invention has the following beneficial effects: the present invention drives the nut to rotate by the handle, and since an internal thread is provided on one side of the nut, and the surface of the screw A is an external thread, and the internal thread is provided on the other side of the nut, and the surface of the screw B is an internal thread, the two screws are matched and screwed together, thereby forming left-handed and right-handed thread rotation, thereby achieving the purpose of expanding and contracting the flexible rotating body;

[0012] The coordinated use of spherical washers and conical washers can prevent movement and avoid slipping during tightening. It is easy and reliable to use and can be applied to large-size flexible rotating bodies of gas and steam turbines of various models and specifications, saving production cycles and improving work efficiency. At the same time, it can achieve size matching according to different product sizes. It can be used for the adjustment and fixation of various models of flexible rotating bodies and can adjust the opening size. There is a waist-shaped hole on the fixing seat, which can be quickly loosened or disassembled when necessary. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a structural diagram of the utility model when the nut and the fixing seat are connected.

[0015] In the figure: 1. Cylinder; 2. Connecting rod; 3. Screw A; 4. Nut; 5. Cavity; 6. Handle; 7. Fixing block; 8. Screw B; 9. Connecting plate; 10. Fixing seat; 11. Side plate; 12. Spherical washer; 13. Conical washer; 14. Screw C; 15. Side plate groove; 16. Transition plate. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-2 The utility model provides a technical solution: an adjustable bridge slewing bearing device, comprising: a cylinder 1, a transition plate 16 and a fixed seat 10, the output end of the cylinder 1 is connected to a connecting rod 2, one end of the connecting rod 2 is connected to one side of the transition plate 16, a screw A3 is provided on one side of the transition plate 16, a nut 4 is provided on one side of the screw A3, an adjustment mechanism is provided on the surface of the nut 4, and the handle 6 of the adjustment mechanism drives the nut 4, the fixing block 7 and the screw B8 to rotate, so that the screw A3 and the screw B8 rotate to form a flexible rotating body that can be expanded and contracted.

[0018] The adjustment mechanism includes a cavity 5 opened inside the nut 4, and the cavity 5 and the nut 4 are integrally formed. The screw A3 is screwed on one side of the nut 4, and the screw B8 is screwed on the other side of the nut 4. The handle 6 is connected to the surface of the nut 4, and the fixing block 7 is connected to the other side of the nut 4 and is located on the inner side of the screw B8.

[0019] An anti-movement mechanism is provided on one side of the screw rod B8, and the screw rod B8 is fixed by using the spherical washer 12 and the conical washer 13 of the anti-movement mechanism together.

[0020] The anti-slip mechanism includes a screw C14 on one side of the screw B8, and one side of the screw C14 is connected to a side plate 11. The conical washer 13 is sleeved on the surface of the screw C14 and is located on one side of the side plate 11. The spherical washer 12 is sleeved on the surface of the screw C14 and is located on one side of the conical washer 13. The spherical washer 12 and the conical washer 13 are used together to avoid slipping during the screwing process.

[0021] One side of the fixing seat 10 is connected to the connecting plate 9 , a waist-shaped hole is opened on one side of the fixing seat 10 , and a side plate groove 15 for fixing the side plate 11 is opened inside the fixing seat 10 .

[0022] Specifically, when in use, the handle 6 drives the nut 4 to rotate. Since one side of the nut 4 is internally threaded, and the surface of the screw A3 is externally threaded, and the other side of the nut 4 is internally threaded, and the surface of the screw B8 is internally threaded, they are matched and screwed together, thereby forming left-handed and right-handed thread rotation, achieving the purpose of expanding and contracting the flexible rotating body;

[0023] In order to avoid the possibility of movement during the rotation process when the nut 4, fixing block 7, screw B8 and screw C14 of the adjustment mechanism are used in conjunction with each other, the spherical washer 12 and the conical washer 13 are then used in conjunction to prevent movement and avoid slipping during the tightening process. It is convenient and reliable to use and can be applied to large-sized flexible rotary bodies of gas and steam turbines of various models and specifications, saving production cycles and improving work efficiency. At the same time, it can achieve size matching according to different product sizes, and can be used for the adjustment and fixation of various models of flexible rotary bodies and can adjust the opening size;

[0024] The fixing seat 10 is provided with a waist-shaped hole, which can be quickly loosened or disassembled when necessary.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable bridge slewing bearing device, comprising: A cylinder (1), a transition plate (16) and a fixed seat (10), characterized in that the output end of the cylinder (1) is connected to a connecting rod (2), one end of the connecting rod (2) is connected to one side of the transition plate (16), a screw A (3) is provided on one side of the transition plate (16), a nut (4) is provided on one side of the screw A (3), and an adjustment mechanism is provided on the surface of the nut (4), and the handle (6) of the adjustment mechanism drives the nut (4), the fixed block (7) and the screw B (8) to rotate, so that the screw A (3) and the screw B (8) rotate to form a flexible rotating body that expands and contracts.

2. The adjustable bridge slewing bearing device according to claim 1, characterized in that: The adjustment mechanism comprises a cavity (5) opened inside the nut (4), the screw rod A (3) is screwed on one side of the nut (4), the screw rod B (8) is screwed on the other side of the nut (4), the handle (6) is connected to the surface of the nut (4), and the fixing block (7) is connected to the other side of the nut (4) and is located inside the screw rod B (8).

3. The adjustable bridge slewing bearing device according to claim 1, characterized in that: An anti-movement mechanism is provided on one side of the screw rod B (8), and the screw rod B (8) is fixed by using the spherical washer (12) and the conical washer (13) of the anti-movement mechanism together.

4. The adjustable bridge slewing bearing device according to claim 3, characterized in that: The anti-movement mechanism includes a screw C (14) on one side of the screw B (8), one side of the screw C (14) is connected to a side plate (11), the conical washer (13) is sleeved on the surface of the screw C (14) and is located on one side of the side plate (11), and the spherical washer (12) is sleeved on the surface of the screw C (14) and is located on one side of the conical washer (13).

5. The adjustable bridge slewing bearing device according to claim 4, characterized in that: A connecting plate (9) is connected to one side of the fixing seat (10), and a side plate groove (15) for fixing the side plate (11) is provided inside the fixing seat (10).

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