Vibration absorption type thrust rod

Abstract

The utility model provides a vibration absorption type thrust rod capable of relieving the radial instability resonance phenomenon in the middle of a thrust rod body. The vibration absorption type thrust rod comprises the thrust rod body and rod heads arranged at the two ends of the thrust rod body. At least one vibration absorber is arranged on the thrust rod body in the length direction of the thrust rod body; the vibration absorber comprises at least two elastic blocks which are arranged on the rod body of the thrust rod along the circumference, and the elastic blocks are connected with a mass block. The vibration absorber is arranged in the middle of the thrust rod body. Resonance energy accumulation of the thrust rod can be greatly relieved, vibration noise transmission is reduced from the path end, vibration noise of structures such as a frame main reducer and the like can be greatly reduced, and the problem of resonance noise in a vehicle is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of automobiles, and particularly relates to a vibration-absorbing thrust rod. Background Art

[0002] Commercial vehicle suspension systems in China and abroad mostly utilize airbag and leaf spring suspensions. Axles typically transmit propulsion and braking forces from the vehicle's powertrain to the chassis via thrust rods and leaf springs. Therefore, the thrust rod is a key component of the vehicle suspension and serves as an auxiliary element in the suspension system. In addition to transmitting propulsion and braking forces, it also prevents excessive lateral roll during cornering, which could lead to unnecessary traffic accidents. The thrust rod is a long rod. Under conditions such as acceleration, constant speed braking, and coasting, the thrust rod provides propulsion or braking force, and its ends are generally subject to pressure. This stress on long rod components can lead to mid-section instability and resonance. Due to space, weight, process, and cost constraints, the thrust rod diameter cannot be increased indefinitely to enhance the radial bending mode of the thrust rod. When the meshing frequency of the main reducer gear on the main reducer axle overlaps with the thrust rod bending mode frequency, the thrust rod provides propulsion or braking force, and its ends are generally subject to pressure. This excitation causes the radial bending mode of the thrust rod to be excited at the same frequency, leading to radial resonance of the thrust rod.

[0003] Patent CN221541145U, a vehicle thrust rod joint, and invention patent application CN118478625A, an X-shaped thrust rod and its design method, primarily focus on rapid assembly and disassembly of the thrust rod and optimize its stability through structural design. Patent CN221417875U, a thrust rod assembly, enhances its strength by optimizing the material (40Cr) of the push rod body and the forging process. Patent CN201849274U discloses a thrust rod assembly comprising a rod head, a tie rod, and a tie tube. The tie rod is plunger-shaped and disposed back-to-back within the tie tube. A rubber body, a spring, and a plug are positioned sequentially from the base of the tie rod plunger to the two ends of the tie tube. A composite bearing is provided within the rod head. Although this structure incorporates a spring and rubber element within the pull rod, a cap is installed at the end of the pull rod, which passes through the pull rod. This cap's structure fixes the pull tube in place, preventing radial movement and thus failing to mitigate radial vibration of the thrust rod. Instead, it acts solely to stretch or compress the elastic material to alleviate axial vibration and improve the bearing life of the rubber strips at both ends. Furthermore, the entire thrust rod is constructed with a thin pull rod within a standard diameter pull tube. Because the thrust rod's diameter cannot be increased indefinitely, the hollow structure within the entire section also affects its performance. Utility Model Content

[0004] The utility model provides a vibration absorbing thrust rod which can reduce the radial instability resonance phenomenon of the middle part of the thrust rod body.

[0005] The purpose of the utility model is achieved in the following way: a vibration-absorbing thrust rod, comprising a thrust rod shaft and rod heads arranged at both ends of the thrust rod shaft; at least one vibration absorber is arranged on the thrust rod shaft along its own length direction; the vibration absorber includes at least two elastic blocks arranged along the circumference of the thrust rod shaft, and the elastic blocks are connected to a mass block.

[0006] The vibration absorber is arranged at the middle position of the thrust rod shaft.

[0007] The elastic blocks are soft rubber blocks or springs; each elastic block is connected to one mass block or at least two elastic blocks are connected to the same mass block.

[0008] The elastic block is a soft rubber block, and the elastic blocks distributed along the circumference of the same vibration absorber form an integral annular soft rubber block.

[0009] The mass block is an integral annular mass block, and the annular mass block is connected to all elastic blocks corresponding to the same vibration absorber.

[0010] The vibration absorber also includes an annular soft rubber vulcanized shell fixed to the outer circumferential surface of the thrust rod shaft. The elastic block is a soft rubber block. The two ends of the elastic block are respectively firmly connected to the mass block and the annular soft rubber vulcanized shell through rubber vulcanization.

[0011] Beneficial effects: Compared with the existing technology, the utility model can absorb the resonance energy generated by the radial instability resonance phenomenon in the middle part of the thrust rod body and the energy of the excitation frequency band where the meshing frequency of the axle main reducer gear overlaps with the bending modal frequency of the thrust rod, thereby greatly alleviating the accumulation of thrust rod resonance energy and reducing the transmission of vibration noise from the path end. It can greatly reduce the structural vibration noise of the frame main reducer and other structures, avoid the resonance noise problem in the vehicle, improve the riding comfort experience of passengers and drivers, and meet the working conditions of commercial vehicles such as buses, heavy trucks, mining cars, and special vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the utility model.

[0013] Figure 2 It is the main view of the utility model.

[0014] Figure 3 This is an embodiment of the utility model in which the annular soft rubber vulcanized shell is not provided.

[0015] The names of the components corresponding to the corresponding reference numerals in the figure are: 1 is the thrust rod rubber ball joint, 2 is the thrust rod ball joint shell, 3 is the mass block, 4 is the elastic block, 5 is the annular soft rubber vulcanized shell, 6 is the thrust rod shaft, and 7 is the vibration absorber. DETAILED DESCRIPTION

[0016] In this utility model, unless otherwise specified or limited, the technical terms used herein shall have the ordinary meanings understood by persons skilled in the art to which this utility model relates. Terms such as "connected," "connected," "fixed," and "disposed" should be interpreted broadly and may refer to fixed, removable, or integral connections; direct or indirect connections through an intermediary; and mechanical or electrical connections. Unless otherwise specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact through an intermediary. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. Relational terms such as first and second are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. The terms used in the description, such as "center", "transverse", "longitudinal", "length", "width", "thickness", "height", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "clockwise", "counterclockwise", etc., to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation.

[0017] The following will combine the accompanying drawings and specific embodiments to clearly and completely describe the technical solution of the present invention. Figure 1-3As shown, a vibration-absorbing thrust rod comprises a thrust rod shaft 6 and rod heads disposed at both ends of the thrust rod shaft 6. The thrust rod shaft 6 is provided with at least one vibration absorber 7 along its length. The vibration absorber 7 comprises at least two elastic blocks 4 circumferentially arranged on the thrust rod shaft 6, each elastic block 4 connected to a mass block 3. The ends of the elastic blocks 4 are fixed to the mass block 3 and the thrust rod shaft 6, respectively. The elastic blocks 4 are made of a material with a certain degree of elastic deformation, such as a spring or rubber. The fixing method can be selected based on the material, such as welding, vulcanization, or screws, among other common methods. The mass block 3 can be made of a material that is not easily deformed and has a certain weight, such as steel, iron, aluminum, or lead. The stiffness of the elastic block 4 can be adjusted by adjusting the material and shape. The width and number of the vibration absorbers 7 can be adjusted as needed. The radial bending modal frequency and resonant frequency f of the thrust rod shaft 6 can be calculated based on existing vibration knowledge. The present invention secures a vibration absorber 7 to the thrust rod shaft 6. The vibration absorption frequency of the vibration absorber 7 can be adjusted by adjusting the mass and stiffness of the mass block 3 and the elastic block 4. This allows the vibration absorber 7 to absorb the overlapping frequency band of the thrust rod bending modal energy frequency and the main reducer gear meshing energy frequency.

[0018] Furthermore, the vibration absorber is provided at the middle position of the thrust rod shaft 6. The middle position of the thrust rod shaft 6 is the most serious position of radial instability. The utility model provides the vibration absorber at the thrust rod shaft 6, which can absorb the resonance energy generated by the resonance phenomenon of radial instability in the middle part of the thrust rod shaft 6 and the energy of the excitation frequency band where the meshing frequency of the axle main reduction gear and the bending modal frequency of the thrust rod overlap with each other, greatly alleviating the accumulation of the thrust rod resonance energy, reducing the transmission of vibration noise from the path end, and greatly reducing the structural vibration noise of the frame main reduction and other structures, avoiding the resonance noise problem in the vehicle, improving the riding comfort experience of passengers and drivers, and meeting the working conditions of commercial vehicles such as buses, heavy trucks, mining cars, and special vehicles. Of course, the vibration absorber 7 can also be provided at other positions as needed.

[0019] Furthermore, the elastic blocks 4 are soft rubber blocks or springs; each elastic block 4 is connected to one mass block 3, or at least two elastic blocks are connected to the same mass block 3. The elastic blocks 4 and mass blocks 3 can be evenly distributed around the circumference of the thrust rod shaft 6, or unevenly distributed, with the circumferential distribution of the mass blocks 3 and elastic blocks 4 being selected based on the desired vibration frequency.

[0020] In one or more embodiments, the elastic block 4 is a soft rubber block, and the elastic blocks distributed along the circumference of the same vibration absorber 7 form an integral annular soft rubber block.

[0021] The mass block 3 can be a single, annular mass block 3 for easy installation and adjustment. The annular mass block 3 connects all elastic blocks 4 corresponding to a single vibration absorber 7. As shown in the accompanying drawings, the elastic blocks 4 are evenly distributed along the circumference of the middle of the thrust rod shaft 6. Together with the annular mass block 3, the annular vibration absorber 7 is formed.

[0022] Furthermore, the vibration absorber 7 also includes an annular soft rubber vulcanized shell 5 fixed to the outer circumferential surface of the thrust rod shaft 6, the elastic block 4 is a soft rubber block, and the two ends of the elastic block 4 are respectively fixed to the mass block 3 and the annular soft rubber vulcanized shell 5 by rubber vulcanization. The annular soft rubber vulcanized shell 5 and the thrust rod shaft 6 can be reliably fixedly connected by extrusion, compression or welding. Providing an annular soft rubber vulcanized shell 5 and connecting the elastic block 4 and the mass block 3 through the annular soft rubber vulcanized shell 5 can effectively reduce the difficulty of manufacturing and installation. If the annular soft rubber vulcanized shell 5 is not provided, the elastic block 4 is made of rubber material and can be directly vulcanized onto the thrust rod shaft 6. Although the implementation process has high technical requirements, it requires fewer parts and has a high degree of integration, and can also achieve the technical effect of vibration reduction. Among them Figure 1 In the embodiment, an annular soft rubber vulcanized shell 5 and an annular mass block 3 are provided, and the elastic block 4, that is, the soft rubber block and the thrust rod shaft 6 are firmly connected to the annular mass block 3 and the annular soft rubber vulcanized shell 5 through a rubber vulcanization process, and then the annular soft rubber vulcanized shell 5 and the thrust rod shaft 6 are firmly fixedly connected by extrusion or welding. Figure 2 In the embodiment, the soft rubber vulcanized housing 5 is not provided, and the elastic block 4, that is, the soft rubber block, is directly firmly connected to the thrust rod shaft (6) through the rubber vulcanization process, thereby achieving a more integrated design.

[0023] In addition, the thrust rod shaft 6 is provided with a rod head at each end, and each rod head is provided with a thrust rod ball joint housing 2, and a thrust rod rubber ball joint 1 is provided within the thrust rod ball joint housing 2. The rod head, thrust rod ball joint housing 2, and thrust rod rubber ball joint 1 are all prior art and will not be described in detail. The present invention can also adopt the structure of other existing rod heads.

[0024] During specific implementation, when the vehicle is in motion, the annular mass block 3, or any other distributed mass blocks 3, bounces up and down with the axle and resonates, absorbing the resonant energy of the thrust rod shaft 6. This utility model addresses the resonant energy generated by the radial instability resonance of the middle portion of the thrust rod shaft 6 by adding an annular vibration absorber. This significantly mitigates the accumulation of resonant energy in the thrust rod, reduces vibration and noise transmission from the path end, and significantly reduces structural vibration and noise from the main reducer and other components of the frame, thus avoiding the problem of resonant noise in the vehicle.

[0025] The technical features of the above-described embodiments may be combined in any manner, and as long as there are no contradictions in the combination of these technical features, they shall be deemed to be within the scope of this specification. Without departing from the overall concept of the present invention, the technical solutions of the present invention, their equivalent replacements or modifications, and certain changes and improvements made thereto shall also be deemed to be within the scope of protection of the present invention.

Claims

1. A vibration-absorbing thrust rod, comprising a thrust rod shaft (6) and rod heads arranged at both ends of the thrust rod shaft (6); characterized in that: At least one vibration absorber (7) is provided on the thrust rod shaft (6) along its length direction; the vibration absorber (7) comprises at least two elastic blocks (4) provided along the circumference of the thrust rod shaft (6), and the elastic blocks (4) are connected to the mass block (3); the vibration absorber (7) further comprises an annular soft rubber vulcanized shell (5) fixed to the outer circumferential surface of the thrust rod shaft (6), the elastic block (4) is a soft rubber block, and the two ends of the elastic block (4) are respectively firmly connected to the mass block (3) and the annular soft rubber vulcanized shell (5) through rubber vulcanization.

2. The vibration-absorbing thrust rod according to claim 1, characterized in that: The vibration absorber (7) is provided at the middle position of the thrust rod shaft (6).

3. The vibration-absorbing thrust rod according to claim 1, characterized in that: Each elastic block (4) is connected to one mass block (3), or at least two elastic blocks are connected to the same mass block (3).

4. The vibration-absorbing thrust rod according to claim 1, characterized in that: The elastic blocks distributed along the circumference of the same vibration absorber (7) form an integral annular soft rubber block.

5. The vibration-absorbing thrust rod according to claim 1, characterized in that: The mass block (3) is an integral annular mass block (3), and the annular mass block (3) is connected to all elastic blocks (4) corresponding to the same vibration absorber (7).

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