A compact directional vibration exciter, vibrating wheel and road roller

Abstract

The application discloses a compact directional vibration exciter, a vibrating wheel and a road roller, which comprises an inner exciter and an outer exciter, wherein the inner exciter comprises a rotating shaft I and an inner eccentric block fixed on the rotating shaft I; the outer exciter comprises a rotating shaft II coaxially arranged with the rotating shaft I and an outer eccentric block fixed on the rotating shaft II; the outer eccentric block is internally provided with a cavity, the inner eccentric block is mounted in the cavity, and the rotating shaft I is rotationally connected with the outer eccentric block through an inner vibration bearing; the inner exciter and the outer exciter have the same eccentric moment and different rotating directions. The structure of the application is simpler, space is effectively utilized, the coaxiality of the vibration bearing installation is easily ensured, and the reliability is higher.

Description

Technical Field

[0001] This invention relates to a compact directional vibration exciter, a vibratory wheel, and a road roller, belonging to the field of road roller technology. Background Technology

[0002] Vibratory rollers have the highest compaction efficiency among road rollers. The vibratory drum is the core working device of a vibratory roller, used for movement and vibration compaction. An exciter is installed inside the vibratory drum. Driven by a hydraulic motor, the exciter rotates, generating excitation force, which causes the vibratory drum to vibrate, thus achieving vibration compaction. The exciter inside the vibratory drum is generally an inertial exciter. The main body of the exciter is an eccentric block with eccentric mass, which is connected to the drive shaft. When the drive shaft rotates, the eccentric mass of the eccentric block excites an inertial excitation force. Currently, the most common exciter installed inside vibratory drums is the circular vibration exciter. The exciters inside the vibratory drum rotate in the same direction, applying a constant excitation force along the centrifugal force direction within the circumference of the vibratory drum. The vibratory drum vibrates not only in the horizontal direction but also in the vertical direction. During vibration compaction, horizontal vibrations not only easily damage the surface layer of the compacted material, causing it to become loose and cracked, but also affect the transmission of vertical vibration force to the material being compacted, weakening the compaction capacity of the roller. The compaction energy is not concentrated and is wasted on the surface, affecting the compaction depth.

[0003] To address the issues of poor surface quality and uneven compaction energy during vibratory wheel compaction, directional vibration exciters were developed. A directional vibration exciter consists of two sets of eccentric blocks with equal excitation forces but opposite rotation directions. The excitation forces are canceled out in one direction and superimposed in the opposite, perpendicular direction, generating a directional excitation force. Vertical directional exciters are commonly used, where the excitation forces are canceled out in the horizontal direction and superimposed in the vertical direction, producing only a vertical excitation force. Without the disturbance of horizontal vibration, vibratory wheels with vertical directional exciters achieve better surface quality and stronger compaction capacity during compaction. Because directional vibration exciters require two sets of eccentric blocks rotating in opposite directions, two drive shafts are needed. There are generally two ways to arrange the two drive shafts: 1. Side-by-side arrangement: Two drive shafts with opposite rotation directions are arranged in parallel inside the vibrating wheel. Each drive shaft is equipped with an exciter. It is necessary to ensure that the excitation force generated by the exciter is equal in magnitude and can cancel the excitation force in one direction to generate directional vibration; 2. Coaxial arrangement: Exciters with equal excitation force are installed on the inner and outer shafts on the same axis. The inner and outer shafts rotate in opposite directions and can cancel the excitation force in one direction to generate directional vibration force.

[0004] The main problems with current directional vibration exciters and vibratory wheels are: non-compact structure and complex, low-reliability vibratory wheel structure. Directional exciters with parallel drive shafts, consisting of two parallel drive shafts and the exciters mounted on them, have an open structure, equivalent to two sets of parallel circular exciters, occupying a large radial space and resulting in low space utilization. Directional exciters with coaxial drive shafts require at least three sets of eccentric blocks within the vibratory wheel to ensure mutual cancellation of excitation forces and stable lateral excitation. These need one large and two small eccentric blocks, with the two smaller eccentric blocks rotating in the opposite direction to the large eccentric block. The sum of the excitation forces of the two smaller eccentric blocks equals that of the large eccentric block. While this arrangement saves radial space, it occupies a large axial space and results in a complex structure. The more complex the exciter structure, the higher the requirements for machining and assembly, and the less conducive it is to bearing lubrication and heat dissipation, affecting the reliability of the exciter and vibratory wheel. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a compact directional vibration exciter, a vibratory wheel, and a road roller, which effectively utilizes the limited space inside the vibratory wheel, making the exciter structure more compact, simpler, and more reliable.

[0006] To achieve the above objectives, the present invention employs a compact directional vibration exciter, comprising:

[0007] An internal exciter, the internal exciter comprising a rotating shaft I and an inner eccentric block fixedly connected to the rotating shaft I;

[0008] An external vibrator includes a rotating shaft II arranged coaxially with a rotating shaft I, an outer eccentric block fixedly connected to the rotating shaft II, a cavity provided inside the outer eccentric block, an inner eccentric block installed inside the cavity, and the rotating shaft I being rotatably connected to the outer eccentric block through an inner vibration bearing.

[0009] The internal exciter and the external exciter have the same eccentricity but different rotation directions.

[0010] As an improvement, the outer eccentric block includes a fixed left outer eccentric block and a right outer eccentric block;

[0011] The rotating shaft II includes a left rotating shaft II and a right rotating shaft II. The left outer eccentric block is fixedly connected to the left rotating shaft II, and the right outer eccentric block is fixedly connected to the right rotating shaft II.

[0012] As an improvement, the internal vibration bearings are symmetrically arranged on both sides of the internal eccentric block.

[0013] As an improvement, the inner vibration bearing penetrates the side wall of the rotating shaft II, the outer end face of the inner vibration bearing is connected to the outer eccentric block, and the inner end face is connected to the rotating shaft I.

[0014] In addition, the present invention also provides a vibrating wheel, including a vibrating wheel body, a vibrating motor, an input shaft, a directional gear set, a main vibrating bearing, and the aforementioned compact directional vibration exciter;

[0015] The output end of the vibration motor is connected to the input shaft, and the other end of the input shaft is connected to the directional gear set. The directional gear set is connected to the rotating shaft I and rotating shaft II of the compact directional vibration exciter, respectively. The compact directional vibration exciter is rotatably connected to the vibration wheel body through the main vibration bearing.

[0016] As an improvement, the directional gear set includes two sets of gears with the same rotational speed but opposite directions. One set of gears drives the internal exciter to rotate, and the other set drives the external exciter to rotate.

[0017] Finally, the present invention also provides a road roller on which the vibrating wheel is installed.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By nesting the internal and external exciters coaxially and symmetrically, only two sets of exciters are needed to achieve stable directional vibration from left to right. The number of exciters is reduced by one compared to the original three sets, making the structure simpler.

[0020] 2. The nesting of the internal and external exciters effectively utilizes space, reduces the axial dimension of the directional exciter, minimizes shaft deformation, and makes rotation more stable.

[0021] 3. The nested internal and external vibrators are easy to manufacture, make it easier to ensure the coaxiality of the bearing installation, reduce the heat generated during bearing operation, and improve reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the vibrating wheel of the present invention;

[0023] Figure 2 This is a front sectional view of the compact directional vibration exciter of the present invention;

[0024] Figure 3 This is a right view of the compact directional vibration exciter of the present invention;

[0025] In the diagram: 1. Vibrating wheel body, 2. Vibrating motor, 3. Input shaft, 4. Split gear set, 5. Main vibration bearing, 6. Compact directional vibration exciter, 6-1. Rotating shaft I, 6-2. Right rotating shaft II, 6-3. Inner vibration bearing, 6-4. Right outer eccentric block, 6-5. Inner eccentric block, 6-6. Left outer eccentric block, 6-7. Left rotating shaft II. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Example 1

[0030] like Figure 2 and Figure 3 As shown, a compact directional vibration exciter includes a rotating shaft I 6-1, a rotating shaft II, an inner vibration bearing 6-3, an outer eccentric block, and an inner eccentric block 6-5;

[0031] The rotating shaft I 6-1 and the rotating shaft II are arranged coaxially. One end of the rotating shaft I 6-1 extends into the rotating shaft II to form a nested structure. The inner eccentric block 6-5 is fixedly connected to the rotating shaft I 6-1 to form an inner exciter. The outer eccentric block is fixedly connected to the rotating shaft II to form an outer exciter. The outer eccentric block has a cavity, and the inner eccentric block 6-5 is located in the cavity of the outer eccentric block.

[0032] The rotating shaft I6-1 is rotatably connected to the outer eccentric block through the inner vibration bearing 6-3. The inner exciter and the outer exciter have the same eccentricity but different rotation directions.

[0033] The compact directional vibration exciter of this invention features an inner and outer exciter nested coaxially and symmetrically. Only two sets of exciters are needed to achieve stable directional vibration from left to right. The number of exciters is reduced by one compared to the original three sets, resulting in a simpler structure. Furthermore, the nesting of the inner and outer exciters effectively utilizes space, reduces the axial dimension of the directional exciter, minimizes shaft deformation, and improves rotational stability. The nesting of the inner and outer exciters also facilitates manufacturing, makes it easier to ensure the coaxiality of the bearing installation, reduces heat generation during bearing operation, and enhances reliability.

[0034] As an improvement to the embodiment, such as Figure 2 As shown, the outer eccentric block includes a left outer eccentric block 6-6 and a right outer eccentric block 6-4 that are fixedly connected, and the left outer eccentric block 6-6 and the right outer eccentric block 6-4 have the same structure;

[0035] The rotating shaft II includes a left rotating shaft II 6-7 and a right rotating shaft II 6-2. The left outer eccentric block 6-6 is fixedly connected to the left rotating shaft II 6-7, and the right outer eccentric block 6-4 is fixedly connected to the right rotating shaft II 6-2.

[0036] As an improvement to the embodiment, such as Figure 2 As shown, the inner vibration bearing 6-3 is symmetrically arranged on both sides of the inner eccentric block 6-5 to ensure that the inner exciter and the outer exciter can rotate effectively.

[0037] As an improvement to the embodiment, such as Figure 2 As shown, the inner vibration bearing 6-3 penetrates the side wall of the rotating shaft II. The outer end face of the inner vibration bearing 6-3 is connected to the outer eccentric block, and the inner end face is connected to the rotating shaft I 6-1, thereby realizing the relative rotation between the rotating shaft I 6-1 and the rotating shaft II.

[0038] Example 2

[0039] like Figures 1-3 As shown, a vibrating wheel includes a vibrating wheel body 1, a vibrating motor 2, an input shaft 3, a directional gear set 4, a main vibrating bearing 5, and a compact directional vibration exciter 6 as described in Embodiment 1;

[0040] The output end of the vibration motor 2 is connected to the input shaft 3, and the other end of the input shaft 3 is connected to the directional gear set 4. The directional gear set 4 is connected to the rotating shaft I 6-1 and the rotating shaft II of the compact directional vibration exciter 6 respectively. The compact directional vibration exciter 6 is rotatably connected to the vibration wheel 1 through the main vibration bearing 5.

[0041] The vibration motor 2 drives the input shaft 3 to rotate. The input shaft 3 is divided into two sets of gears with the same rotation speed but opposite directions by the split gear set 4. One set of gears drives the rotating shaft I 6-1 to rotate, realizing the rotation of the internal exciter. The other set of gears drives the rotating shaft II to rotate, realizing the rotation of the external exciter. The two sets of exciters have the same eccentricity but different rotation directions, so they can cancel the excitation force in one direction and generate directional vibration force. The directional vibration force generated by the compact directional vibration exciter 6 is transmitted to the vibration wheel body 1 through the main vibration bearing 5 to realize the directional vibration wheel.

[0042] Example 3

[0043] The present invention also provides a road roller, wherein the road roller is equipped with the vibratory wheel described in Embodiment 2.

[0044] The present invention has a simpler structure, makes efficient use of space, easily ensures the coaxiality of the vibration bearing installation, and has higher reliability.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A compact directional vibration exciter, characterized in that, include: An internal exciter, comprising a rotating shaft I (6-1) and an inner eccentric block (6-5) fixedly connected to the rotating shaft I (6-1). An external vibrator, comprising a rotating shaft II coaxially arranged with rotating shaft I (6-1), an outer eccentric block fixedly connected to rotating shaft II, an inner eccentric block (6-5) installed in the outer eccentric block, and rotating shaft I (6-1) rotatably connected to the outer eccentric block through an inner vibration bearing (6-3). The internal exciter and the external exciter have the same eccentricity but different rotation directions. The outer eccentric block includes a left outer eccentric block (6-6) and a right outer eccentric block (6-4) that are fixedly connected; the rotating shaft II includes a left rotating shaft II (6-7) and a right rotating shaft II (6-2). The left outer eccentric block (6-6) is fixedly connected to the left rotating shaft II (6-7), and the right outer eccentric block (6-4) is fixedly connected to the right rotating shaft II (6-2); the inner vibration bearing (6-3) is symmetrically arranged on both sides of the inner eccentric block (6-5); the inner vibration bearing (6-3) penetrates the side wall of the rotating shaft II, and the outer end face of the inner vibration bearing (6-3) is connected to the outer eccentric block, and the inner end face is connected to the rotating shaft I (6-1).

2. A vibrating wheel, characterized in that, It includes a vibrating wheel (1), a vibrating motor (2), an input shaft (3), a directional gear set (4), a main vibrating bearing (5), and a compact directional vibration exciter (6) as described in claim 1. The output end of the vibration motor (2) is connected to the input shaft (3), and the other end of the input shaft (3) is connected to the directional gear set (4). The directional gear set (4) is connected to the rotating shaft I (6-1) and rotating shaft II of the compact directional vibration exciter (6). The compact directional vibration exciter (6) is rotatably connected to the vibration wheel body (1) through the main vibration bearing (5).

3. A vibrating wheel according to claim 2, characterized in that, The directional gear set (4) includes two sets of gears with the same rotation speed but opposite directions. One set of gears drives the internal exciter to rotate, and the other set drives the external exciter to rotate.

4. A road roller, characterized in that, The road roller is equipped with a vibratory wheel as described in any one of claims 2-3.

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