A pre-bent vibration-damping long screw device

Abstract

The present application relates to a pre-bent vibration damping long screw device, which includes a rod portion and thread portions provided at both ends of the rod portion. A vibration damping connecting member is also provided on the rod portion. The vibration damping connecting member is used to connect the rod portion to the fuselage, and the vibration damping connecting member applies a pre-bending force to the rod portion so that the rod portion is in a bent state. When the pre-bent vibration damping long screw device of the present application is in use, both ends of the rod portion are respectively passed through the connection holes of the two parts of the fuselage to be connected, and locking nuts are respectively screwed and installed on the thread portions at both ends of the rod portion to connect and fix the two parts of the fuselage together. The vibration damping connecting member is fixedly connected to the fuselage, the rod portion is connected to the fuselage through the vibration damping connecting member, and a pre-bending force is applied to the rod portion through the vibration damping connecting member so that the rod portion is in a slightly bent state. When the fuselage of the shearer vibrates, through the pre-bent rod portion, the vibration frequency of the rod portion is changed, avoiding resonance between the rod portion and the fuselage, thereby preventing the long screw from prematurely suffering from fatigue fracture and prolonging the service life of the long screw.

Description

Technical Field

[0001] The present application relates to the technical field of long screws for shearers, and in particular to a pre-bent vibration-damping long screw device. Background Art

[0002] When the various parts of the shearer body are connected to form a whole, long screws are usually used for connection. The long screws for shearers in the prior art generally include a rod portion and threaded portions provided at both ends of the rod portion. When connecting the various parts of the body, the two ends of the long screw are respectively passed through the connection holes of the two parts of the body to be connected, and then locking nuts are screwed and installed on the threaded portions at both ends of the long screw to connect and fix the two parts of the body together. In actual production, the shearer is subjected to large impact loads and frequent vibration shocks during coal mining, resulting in frequent vibration of the long screw and obvious vibration amplitude. The long screw often prematurely undergoes fatigue fracture, and the service life of the long screw is relatively short. Summary of the Invention

[0003] In order to improve the technical problems that the long screw in the above prior art often prematurely undergoes fatigue fracture and has a relatively short service life during use, the present application provides a pre-bent vibration-damping long screw device.

[0004] The pre-bent vibration-damping long screw device provided by the present application adopts the following technical solutions:

[0005] A pre-bent vibration-damping long screw device includes a rod portion and threaded portions provided at both ends of the rod portion. A vibration-damping connecting member is further provided on the rod portion. The vibration-damping connecting member is used to connect the rod portion to the body, and the vibration-damping connecting member applies a pre-bending force to the rod portion so that the rod portion is in a bent state.

[0006] By adopting the above technical solutions, when the pre-bent vibration-damping long screw device of the present application is in use, the two ends of the rod portion are respectively passed through the connection holes of the two parts of the body to be connected, and then locking nuts are screwed and installed on the threaded portions at both ends of the rod portion to connect and fix the two parts of the body together. Then, one side of the vibration-damping connecting member is fixedly connected to the body. The rod portion is connected to the body through the vibration-damping connecting member, and a pre-bending force is applied to the rod portion through the vibration-damping connecting member so that the rod portion is in a slightly bent state. When the body of the shearer vibrates, through the pre-bent rod portion, the vibration frequency of the rod portion is changed, resonance between the rod portion and the body is avoided, and at the same time, the vibration amplitude of the one-way rod portion is suppressed, thereby preventing the long screw from prematurely undergoing fatigue fracture and extending the service life of the long screw.

[0007] Optionally, the vibration-damping connecting member is a vibration-damping connecting ring. A through hole for passing through the rod portion is provided on the vibration-damping connecting ring, and the vibration-damping connecting ring is sleeved on the rod portion.

[0008] By adopting the above technical solutions, the vibration-damping connecting ring sleeved on the rod portion can more firmly connect the rod portion to the body.

[0009] Optionally, an elastic damping ring is further provided in the perforation of the damping connection ring. The elastic damping ring is sleeved on the rod portion, and the elastic damping ring is disposed between the damping connection ring and the rod portion.

[0010] By adopting the above technical solution, the elastic damping ring can absorb part of the vibration energy through its own elasticity, thereby protecting the long screw rod, weakening the negative impact of the vibration on the long screw rod, and prolonging the service life of the long screw rod.

[0011] Optionally, a notch for facilitating the sleeving on the rod portion is further formed in the elastic damping ring along its length direction.

[0012] By adopting the above technical solution, the elastic damping ring can be quickly and conveniently sleeved on the rod portion through the notch.

[0013] Optionally, the damping connection ring is of a split structure. The damping connection ring includes a first combined ring and a second combined ring, and the first combined ring and the second combined ring are spliced to form the damping connection ring.

[0014] By adopting the above technical solution, it is convenient to sleeve the damping connection ring on the rod portion.

[0015] Optionally, through holes corresponding to each other are formed in the first combined ring and the second combined ring, and a bolt is screwed and installed in the threaded connection hole. The first combined ring and the second combined ring are connected by the bolt.

[0016] By adopting the above technical solution, the disassembly and assembly of the damping connection ring are convenient, so that the damping connection ring can be conveniently installed on the rod portion or removed from the rod portion.

[0017] Optionally, the length of the bolt is greater than the length of the threaded connection hole, and a part of the rod portion of the bolt extends outwards from the threaded connection hole to form an outward extension portion, and the outward extension portion is used for threaded connection with the fuselage.

[0018] By adopting the above technical solution, it is convenient to connect the damping connection ring and the rod portion to the fuselage, and it is also convenient to disassemble the damping connection ring and the rod portion from the fuselage for replacement.

[0019] Optionally, at least two damping connectors are arranged at intervals along the length direction of the rod portion.

[0020] By adopting the above technical solution, the pre-bending force can be applied to the rod portion more stably to make the rod portion in a bent state, and the connection strength can be improved. Description of the Drawings

[0021] Figure 1 is a schematic structural view of the pre-bent damping long screw rod device in the embodiment of the present application during use;

[0022] Figure 2 It is a schematic cross-sectional structure diagram showing a vibration damping connection ring and an elastic vibration damping ring;

[0023] Figure 3 It is Figure 2 the sectional view taken along the A-A direction in

[0024] Explanation of reference numerals: 1, rod part; 2, threaded part; 3, vibration damping connection ring; 31, first combined ring; 32, second combined ring; 4, bolt; 41, extension part; 5, elastic vibration damping ring; 51, notch; 6, left traction box; 7, intermediate electric control box; 8, right traction box; 9, hydraulic nut; 10, lock nut. Specific implementation manners

[0025] The following further elaborates on this application in conjunction with the attached drawings.

[0026] In this embodiment, a pre-bent vibration damping long screw device connecting the left traction box 6, the intermediate electric control box 7, and the right traction box 8 of a shearer is taken as an example for illustration.

[0027] Referring to Figure 1 and Figure 2 , an embodiment of this application discloses a pre-bent vibration damping long screw device, including a rod part 1 and threaded parts 2 provided at both ends of the rod part 1. A vibration damping connecting member is also provided on the rod part 1. The vibration damping connecting member is used to connect the rod part 1 to the fuselage, and the vibration damping connecting member applies a pre-bending force to the rod part 1 so that the rod part 1 is in a bent state. In this embodiment, two vibration damping connecting members are provided at intervals along the length direction of the rod part 1.

[0028] Referring to Figure 2 and Figure 3 , the vibration damping connecting member is a vibration damping connection ring 3. A through hole for passing through the rod part 1 is opened on the vibration damping connection ring 3, and the vibration damping connection ring 3 is sleeved on the rod part 1. The vibration damping connection ring 3 is of a split structure. The vibration damping connection ring 3 includes a first combined ring 31 and a second combined ring 32. The first combined ring 31 and the second combined ring 32 are spliced to form the vibration damping connection ring 3. Corresponding threaded connection holes are opened on the first combined ring 31 and the second combined ring 32. A bolt 4 is screwed and installed in the threaded connection holes, and the first combined ring 31 and the second combined ring 32 are connected by the bolt 4. The length of the bolt 4 is greater than the length of the threaded connection hole. A part of the rod part 1 of the bolt 4 extends outwards from the threaded connection hole to form an extension part 41, and the extension part 41 is used for threaded connection with the intermediate electric control box 7. Such a design can facilitate connecting the vibration damping connection ring 3 and the rod part 1 to the intermediate electric control box 7, and also facilitate disassembling the vibration damping connection ring 3 and the rod part 1 from the intermediate electric control box 7 for replacement.

[0029] Continuing to refer to Figure 2 and Figure 3, an elastic damping ring 5 is further provided in the perforation of the damping connection ring 3. The elastic damping ring 5 is sleeved on the rod portion 1, and the elastic damping ring 5 is disposed between the damping connection ring 3 and the rod portion 1. In this embodiment, the elastic damping ring 5 is made of an elastic rubber material. The elastic damping ring 5 can absorb part of the vibration energy through its own elasticity, thereby protecting the long screw rod, weakening the negative impact of the vibration on the long screw rod, and extending the service life of the long screw rod. A notch 51 is further formed in the elastic damping ring 5 along its length direction for facilitating the sleeving on the rod portion 1. The elastic damping ring 5 can be quickly and conveniently sleeved on the rod portion 1 through the notch 51.

[0030] The implementation principle of the embodiment of the present application is as follows: When the pre-bent damping long screw rod device of the present application is in use, the two ends of the rod portion 1 are respectively passed through the connection holes of the left traction box 6 and the right traction box 8, and then the hydraulic nuts 9 and the locking nuts 10 are respectively screwed and installed on the threaded portions 2 at the two ends of the rod portion 1 to connect and fix the left traction box 6, the middle electronic control box 7 and the right traction box 8 together. Then, the elastic damping ring 5 is sleeved on the rod portion 1, and then the first closing ring 31 and the second closing ring 32 are buckled on the elastic damping ring 5. Then, the first closing ring 31 and the second closing ring 32 are fastened to the middle electronic control box 7 by bolts 4. The rod portion 1 is connected to the fuselage through the damping connecting member, and a pre-bending force is applied to the rod portion 1 through the damping connecting member so that the rod portion 1 is in a slightly bent state. When the fuselage of the shearer vibrates, since the rod portion 1 is pre-bent, the vibration frequency of the rod portion 1 is changed, resonance between the rod portion 1 and the fuselage is avoided, and at the same time, the damping connecting member suppresses the vibration amplitude of the rod portion 1, thereby preventing the long screw rod from prematurely occurring fatigue fracture phenomenon and extending the service life of the long screw rod. Moreover, the elastic damping ring 5 can absorb part of the vibration energy through its own elasticity, thereby protecting the long screw rod, weakening the negative impact of the vibration on the long screw rod, and extending the service life of the long screw rod.

[0031] The embodiments of the specific implementation manners are all the preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A pre-bent vibration damping long screw device, comprising a rod portion (1) and thread portions (2) provided at both ends of the rod portion (1), characterized in that, A vibration damping connecting member is further provided on the rod portion (1). The vibration damping connecting member is used to connect the rod portion (1) to the fuselage, and the vibration damping connecting member applies a pre-bending force to the rod portion (1) so that the rod portion (1) is in a bent state; The vibration damping connecting member is a vibration damping connecting ring (3). A through hole for passing through the rod portion (1) is formed in the vibration damping connecting ring (3), and the vibration damping connecting ring (3) is sleeved on the rod portion (1); An elastic vibration damping ring (5) is further provided in the through hole of the vibration damping connecting ring (3). The elastic vibration damping ring (5) is sleeved on the rod portion (1), and the elastic vibration damping ring (5) is disposed between the vibration damping connecting ring (3) and the rod portion (1).

2. The pre-bent vibration damping long screw device according to claim 1, wherein A notch (51) for facilitating sleeving on the rod portion (1) is further formed in the elastic vibration damping ring (5) along its length direction.

3. The pre-bending vibration damping long screw device according to claim 2, characterized in that, The vibration damping connecting ring (3) is of a split structure. The vibration damping connecting ring (3) includes a first mating ring (31) and a second mating ring (32), and the first mating ring (31) and the second mating ring (32) are spliced to form the vibration damping connecting ring (3).

4. The pre-bending vibration damping long screw device according to claim 3, wherein, Corresponding through threaded connection holes are formed in the first mating ring (31) and the second mating ring (32), and a bolt (4) is screwed and installed in the threaded connection holes. The first mating ring (31) and the second mating ring (32) are connected by the bolt (4).

5. The pre-bent vibration damping long screw device according to claim 4, characterized in that, The length of the bolt (4) is greater than the length of the threaded connection hole. A part of the rod portion (1) of the bolt (4) extends outwards from the threaded connection hole to form an outer extension portion (41), and the outer extension portion (41) is used for threaded connection with the fuselage.

6. The pre-bent vibration damping long screw device according to claim 2, characterized in that, At least two vibration damping connecting members are arranged at intervals along the length direction of the rod portion (1).

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