Transmission shaft torsional vibration attenuation device

Abstract

The utility model discloses a torsional vibration attenuation device for a transmission shaft, which belongs to the technical field of transmission shaft support and comprises a first tilting fillet and a second tilting fillet which are symmetrically arranged, and a first bearing and a second bearing which are arranged on the first tilting fillet and the second tilting fillet. The dynamic vibration absorption assembly is arranged between the two bearings, limits axial displacement of the bearings and is arranged on the transmission shaft penetrating through the tilting fillet in a sleeving mode. The dynamic vibration absorption assembly comprises an elastic body, an inertia mass block, an expansion layer and a cover plate, the assembly can be fixed to the transmission shaft through expansion bolts on the cover plate, in addition, a bearing is provided with double taper holes used for increasing lubrication, the two ends of the transmission shaft are provided with connecting flanges in a matched mode, and the lower end of a tilting fillet is provided with a fixing through hole. Through the first tilting fillet and the second tilting fillet which are symmetrically arranged and the dynamic vibration absorption assembly, the torsional vibration resistance of the transmission shaft is improved, abnormal sound is reduced, and the stability and safety of equipment are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shaft supports, in particular to a transmission shaft torsional vibration damping device. Background Art

[0002] Rough terrain cranes often need to operate under harsh conditions, such as rough terrain and heavy loads. Under these conditions, the high impact loads can easily cause torsional resonance in the drive chain. This resonance can cause abnormal noise in the drive chain and, in severe cases, can even affect the stability and safety of the equipment, reducing operational efficiency.

[0003] In existing technology, the drive chain of a rough terrain crane typically utilizes a single-support structure, meaning the drive shaft is supported by only one bearing. This structure is simple, but under harsh operating conditions, the single-support structure is susceptible to damage due to excessive impact loads. Once the support structure is damaged, the torsional resonance problem of the drive chain will be exacerbated, resulting in unstable equipment operation and even potential safety accidents. Furthermore, the drive chain in existing technology is not equipped with a dedicated vibration damping device. Without effective vibration damping measures, the vibration energy generated by the drive chain during torsional resonance cannot be effectively absorbed and attenuated, making abnormal noise difficult to avoid.

[0004] In summary, the existing technology uses a single support structure that is easily damaged under harsh working conditions, which exacerbates the torsional resonance problem of the transmission chain. At the same time, it lacks an effective vibration attenuation device and cannot effectively reduce the vibration and abnormal noise generated by the torsional resonance of the transmission chain. Utility Model Content

[0005] The purpose of the present utility model is to overcome the deficiencies in the prior art and provide a drive shaft torsional vibration attenuation device. By improving the support and adding a dynamic vibration absorption component, the torsional vibration resistance of the drive shaft is improved, abnormal noise is reduced, and the stability and safety of the equipment are improved, thereby meeting the use requirements under harsh working conditions.

[0006] To achieve the above objectives, the present invention provides a transmission shaft torsional vibration attenuation device, comprising:

[0007] First tile seat;

[0008] a second tile seat, arranged symmetrically with the first tile seat;

[0009] a first bearing mounted on the first shoe seat;

[0010] a second bearing, mounted on the second shoe seat and arranged symmetrically with the first bearing;

[0011] a dynamic vibration absorbing assembly, disposed between the first bearing and the second bearing, and configured to limit axial displacement of the first bearing and the second bearing; and

[0012] The transmission shaft is passed through the first tile seat and the second tile seat and supported by the first bearing and the second bearing, and the dynamic vibration absorbing component is sleeved on the transmission shaft.

[0013] Furthermore,

[0014] a first supporting rubber layer, disposed between the first bearing and the first shoe seat; and

[0015] a second supporting rubber layer, disposed between the second bearing and the second shoe seat;

[0016] The first supporting rubber layer and the second supporting rubber layer are used to mitigate impact and attenuate vibration.

[0017] Furthermore, the dynamic vibration absorbing component includes:

[0018] Elastomers;

[0019] An inertial mass block is sleeved outside the elastic body;

[0020] an expansion layer fixed in the inertial mass block; and

[0021] Cover plates, fixed at both ends of the expansion layer, for limiting the first bearing and the second bearing;

[0022] The cover plate is provided with an expansion bolt, and the expansion bolt is used to expand and deform the expansion layer so as to fix the dynamic vibration absorbing component on the transmission shaft.

[0023] Furthermore, both the first bearing and the second bearing are provided with double tapered holes for increasing lubrication.

[0024] Furthermore, the double-tapered holes are evenly distributed circumferentially along the central axis of the first bearing or the second bearing, and there are eight of them.

[0025] Furthermore, both ends of the transmission shaft are provided with connecting flanges for receiving transmission.

[0026] Furthermore, the lower ends of the first tile seat and the second tile seat are both provided with through holes for fixing.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) The present invention adopts a symmetrical arrangement of the first and second bearings, and installs the first and second bearings thereon, thereby forming a double-support structure. Compared with the traditional single-support structure, this design can better disperse stress when subjected to large impact loads, effectively prevent the transmission shaft from torsional resonance under harsh working conditions, and improve the stability of the entire transmission chain.

[0029] (2) The present invention incorporates a dynamic vibration absorption component, which comprises an elastomer, an inertial mass block, an expansion layer, and a cover plate. When the drive shaft vibrates, the dynamic vibration absorption component absorbs part of the vibration energy and attenuates the vibration amplitude through the interaction of its internal structure, thereby significantly reducing the abnormal noise that may occur during the operation of the equipment.

[0030] (3) The double tapered holes opened on the first bearing and the second bearing of the utility model not only contribute to the uniform distribution of lubricating oil, but also improve the lubrication effect, reduce the wear problem caused by poor lubrication, and extend the service life of the bearings.

[0031] (4) The connecting flanges provided at both ends of the transmission shaft of the present invention facilitate connection with other mechanical components, while the fixing through-holes at the lower end of the tile seat simplify the overall installation process of the equipment, making daily maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a transmission shaft torsional vibration damping device provided by an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the interior of the transmission shaft torsional vibration damping device provided by an embodiment of the present utility model;

[0034] Figure 3 Schematic diagram of a first bearing and a second bearing in a transmission shaft torsional vibration damping device provided by an embodiment of the present utility model;

[0035] Figure 4 This is a schematic diagram of the shapes of the lubrication holes of the first bearing and the second bearing in the transmission shaft torsional vibration damping device provided by an embodiment of the present utility model;

[0036] Figure 5 1 is a cross-sectional schematic diagram of a dynamic vibration absorbing assembly in a transmission shaft torsional vibration damping device provided by an embodiment of the present utility model;

[0037] Figure 6 It is a structural schematic diagram of a dynamic vibration absorbing component in a transmission shaft torsional vibration damping device provided by an embodiment of the present utility model.

[0038] Explanation of the reference numerals: 1. First tile seat; 2. Second tile seat; 3. First bearing; 4. Second bearing; 5. First supporting rubber layer; 6. Second supporting rubber layer; 7. Transmission shaft; 8. Dynamic vibration absorbing assembly. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] like Figure 1 and Figure 2 As shown, this embodiment provides a transmission shaft torsional vibration damping device, 1. A transmission shaft torsional vibration damping device, comprising:

[0043] First tile seat 1;

[0044] The second tile seat 2 is arranged symmetrically with the first tile seat 1;

[0045] The first bearing 3 is mounted on the first shoe seat 1;

[0046] The second bearing 4 is mounted on the second shoe seat 2 and is arranged symmetrically with the first bearing 3;

[0047] A dynamic vibration absorbing assembly 8 is provided between the first bearing 3 and the second bearing 4 and is used to limit the axial displacement of the first bearing 3 and the second bearing 4; and

[0048] The transmission shaft 7 is passed between the first shoe seat 1 and the second shoe seat 2 and supported by the first bearing 3 and the second bearing 4 , and the dynamic vibration absorbing assembly 8 is sleeved on the transmission shaft 7 .

[0049] Specifically, it also includes:

[0050] A first supporting rubber layer 5 is provided between the first bearing 3 and the first shoe seat 1; and

[0051] A second supporting rubber layer 6 is provided between the second bearing 4 and the second shoe seat 2;

[0052] The first supporting rubber layer 5 and the second supporting rubber layer 6 are used to mitigate impact and attenuate vibration.

[0053] like Figure 5 and Figure 6 As shown, specifically, the dynamic vibration absorbing component 8 includes:

[0054] Elastomer 11;

[0055] The inertial mass block 12 is sleeved outside the elastic body 11;

[0056] The expansion layer 10 is fixed in the inertial mass block 12; and

[0057] The cover plate 9 is fixed at both ends of the expansion layer 10 and is used to limit the first bearing 3 and the second bearing 4;

[0058] Cover plate 9 is provided with expansion bolts 13, which are used to expand and deform expansion layer 10, thereby securing dynamic vibration absorber assembly 8 to drive shaft 7, so that it rotates with the drive shaft 7. Elastomer 11 and inertial mass 12 form a two-degree-of-freedom system, which causes the resonant amplitude of dynamic vibration absorber 8 to counteract the amplitude on drive shaft 7, thus achieving a vibration absorption and reduction effect.

[0059] like Figure 4 As shown, both the first bearing 3 and the second bearing 4 are provided with double tapered holes for increasing lubrication, and both sides of the openings of the double tapered holes are trumpet-shaped.

[0060] Preferably, if Figure 3 As shown, the double tapered holes are evenly distributed circumferentially along the central axis of the first bearing 3 or the second bearing 4 , and there are eight of them.

[0061] Furthermore, connecting flanges are provided at both ends of the transmission shaft for receiving transmission.

[0062] Specifically, through holes for fixing are formed at the lower ends of the first tile seat 1 and the second tile seat 2 .

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A transmission shaft torsional vibration damping device, characterized in that: include: First tile seat (1); A second tile seat (2) is arranged symmetrically with the first tile seat (1); A first bearing (3) is mounted on the first shoe seat (1); A second bearing (4) is mounted on the second shoe seat (2) and is arranged symmetrically with the first bearing (3); a dynamic vibration absorbing assembly (8), disposed between the first bearing (3) and the second bearing (4), and used to limit the axial displacement of the first bearing (3) and the second bearing (4); and The transmission shaft (7) is passed between the first tile seat (1) and the second tile seat (2), and is supported by the first bearing (3) and the second bearing (4), and the dynamic vibration absorbing component (8) is sleeved on the transmission shaft (7).

2. The transmission shaft torsional vibration damping device according to claim 1, characterized in that: Also includes, a first supporting rubber layer (5) disposed between the first bearing (3) and the first shoe seat (1); and A second supporting rubber layer (6) is provided between the second bearing (4) and the second shoe seat (2); The first supporting rubber layer (5) and the second supporting rubber layer (6) are used to mitigate impact and attenuate vibration.

3. The transmission shaft torsional vibration damping device according to claim 1, characterized in that: The dynamic vibration absorbing component (8) comprises: Elastomer (11); an inertial mass block (12) sleeved outside the elastic body (11); an expansion layer (10) fixed in the inertial mass block (12); and Cover plates (9) are fixed at both ends of the expansion layer (10) and are used to limit the first bearing (3) and the second bearing (4); The cover plate (9) is provided with an expansion bolt (13), and the expansion bolt (13) is used to expand and deform the expansion layer (10) so as to fix the dynamic vibration absorbing component (8) on the transmission shaft (7).

4. The transmission shaft torsional vibration damping device according to claim 1, characterized in that: Both the first bearing (3) and the second bearing (4) are provided with double tapered holes for increasing lubrication.

5. The transmission shaft torsional vibration damping device according to claim 4, characterized in that: The double-tapered holes are evenly distributed circumferentially along the central axis of the first bearing (3) or the second bearing (4), and the number of the double-tapered holes is eight.

6. The transmission shaft torsional vibration damping device according to claim 1, characterized in that: Both ends of the transmission shaft are provided with connecting flanges for receiving transmission.

7. The transmission shaft torsional vibration damping device according to claim 1, characterized in that: The lower ends of the first tile seat (1) and the second tile seat (2) are both provided with through holes for fixing.

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