阅读说明：本技术 一种4d型振动结构 (4D type vibration structure ) 是由 谢成君 于 2020-07-21 设计创作，主要内容包括：本发明属于道路工程机械技术领域,公开了一种4D型振动结构,包括偶数个且至少4个偏心轴,偏心轴轴向方向相互平行且重心处于同一平面内；偏心轴通过相互啮合的齿轮按上端和下端各一个、中间每行两个的结构沿上下两个齿轮的轴心连线对称分布组成振动单元,上下相邻的齿轮啮合,左右相邻的齿轮不啮合；振动单元水平方向的分力相互抵消,竖直方向的分力相互叠加,形成激振力F,形成一个规则的正弦波振动。本发明振动结构既保证齿轮相互啮合受力均匀、又能保证离心力分力的叠加和抵消,无对振动箱的偏转力矩；同时采用相同离心力的偏心轴,使得工艺及维护简单,对偏心块加工精度要求不高。(The invention belongs to the technical field of road engineering machinery, and discloses a 4D type vibration structure, which comprises an even number of at least 4 eccentric shafts, wherein the axial directions of the eccentric shafts are parallel to each other, and the gravity centers of the eccentric shafts are positioned in the same plane; the eccentric shafts are symmetrically distributed along the axis connecting line of the upper gear and the lower gear to form a vibration unit through the mutually meshed gears according to the structure that one gear is arranged at the upper end and the lower end of each eccentric shaft and two gears are arranged in each middle row, the vertically adjacent gears are meshed, and the horizontally adjacent gears are not meshed; the horizontal component forces of the vibration units are mutually offset, and the vertical component forces are mutually superposed to form an exciting force F, so that a regular sine wave vibration is formed. The vibration structure of the invention not only ensures that the gears are meshed with each other and stressed evenly, but also ensures the superposition and offset of centrifugal force component force, and has no deflection moment to the vibration box; meanwhile, eccentric shafts with the same centrifugal force are adopted, so that the process and the maintenance are simple, and the requirement on the machining precision of the eccentric blocks is not high.)

1. A4D type vibrating structure which characterized in that: the eccentric shaft comprises an even number of at least 4 eccentric shafts, the axial directions of the eccentric shafts are parallel to each other, and the centers of gravity of the eccentric shafts are positioned in the same plane; the eccentric shafts are symmetrically distributed along the axis connecting line of the upper gear and the lower gear to form a vibration unit through the mutually meshed gears according to the structure that one gear is arranged at the upper end and the lower end of each eccentric shaft and two gears are arranged in each middle row, the vertically adjacent gears are meshed, and the horizontally adjacent gears are not meshed; the horizontal component forces of the vibration units are mutually offset, and the vertical component forces are mutually superposed to form an exciting force F, so that regular sine wave vibration is formed.

2. A 4D type vibration structure according to claim 1, wherein: the eccentric shafts in the same row have the same eccentricity and the same direction, and the centrifugal forces generated by the eccentric shafts have the same magnitude and the same direction; the eccentric shafts in adjacent rows have the same eccentricity and opposite directions, and the centrifugal forces generated by the eccentric shafts have the same magnitude and opposite directions.

3. A 4D type vibration structure according to claim 1, wherein: the 4D type vibration structure comprises 4 eccentric shafts, and the 4 eccentric shafts are arranged in a diamond shape; the eccentric moments of the upper eccentric shaft and the lower eccentric shaft are both M1, the centrifugal force generated by the eccentric shafts is F1, the eccentric moment of the middle eccentric shaft is both M2, the centrifugal force generated by the eccentric shafts is F2, the sizes of M1 and M2 are the same, and the directions of the F1 and F2 are the same, and the directions of the F1 and the F2 are opposite.

4. A 4D type vibration structure according to claim 1, wherein: the 4D type vibration structure includes 4, 6, 8, 10, 12, or 14 eccentric shafts.

Technical Field

The invention relates to the technical field of road engineering machinery, in particular to a 4D type vibration structure.

Background

The pavement resonance crusher is a pavement crushing machine, adopts a resonance technology to enable the vibration frequency of a vibration hammer head to be close to the natural frequency of a cement pavement, excites resonance, accordingly easily crushes the cement pavement, and has the advantages of strong power, reliable work and the like.

The vibration box is an important working part of the pavement crusher, the working principle of the vibration box is that a vibration unit is formed by an eccentric wheel and a gear box, the gear box outputs power to drive the eccentric wheel to rotate, the vibration box is driven to vibrate under the action of the eccentric wheel, and a vibration head is driven to beat the ground, so that the pavement is crushed. The traditional vibrating shaft of the vibrating box is transversely arranged, when the power of a vibrating system needs to be increased, the number of the vibrating shaft needs to be increased, the transverse size of the whole vibrating box is increased, and the vibrating box is difficult to enter a narrow area for construction.

In order to solve the problem that the transverse size of the vibration box is large due to transverse arrangement of the vibration shafts, 3X type (see the Chinese patent with the application number of 2015103648186 for details) and 4Z type (see the Chinese patent with the application number of 2018110260164 for details) vibration structures with longitudinally arranged vibration shafts are developed in the prior art, however, when the 3X type vibration structures counteract the force in the horizontal direction, the size of an eccentric wheel needs to be accurately calculated, if the calculation or processing deviation occurs, the vibration box shakes seriously in the horizontal direction, and due to unavoidable error, the 3X vibration structures have the defects of poor working stability, short service life of equipment and the like; although the component force of the 4Z-shaped structure in the horizontal direction has two opposite forces with the same magnitude, the component force has a deflection moment around the center of the vibration box, so that the vibration box obviously shakes in the left-right direction during work; meanwhile, gears in the middle part of the 3X or 4Z-shaped structure are two meshing points, and the upper gear and the lower gear are one meshing point, so that the gears are meshed under different stress, the gears are unevenly stressed and worn inconsistently, and the service life of the gears is short.

Disclosure of Invention

In order to overcome the defects that an eccentric wheel of the existing vibration structure is difficult to accurately calculate and process (3X type), the stress distribution of a gear is uneven, and an eccentric shaft generates deflection moment to enable a vibration box to shake left and right (4Z type), the invention provides a 4D type vibration structure, which not only ensures that the gears are meshed with each other and stressed evenly, but also ensures that the centrifugal force component is superposed and offset, and has no deflection moment to the vibration box; meanwhile, eccentric shafts with the same centrifugal force are adopted, so that the process and the maintenance are simple, and the requirement on the machining precision of the eccentric blocks is not high.

In order to achieve the purpose, the invention adopts the following technical scheme:

A4D type vibration structure comprises an even number of at least 4 eccentric shafts, wherein the axial directions of the eccentric shafts are parallel to each other, and the centers of gravity of the eccentric shafts are in the same plane; the eccentric shafts are symmetrically distributed along the axis connecting line of the upper gear and the lower gear to form a vibration unit through the mutually meshed gears according to the structure that one gear is arranged at the upper end and the lower end of each eccentric shaft and two gears are arranged in each middle row, the vertically adjacent gears are meshed, and the horizontally adjacent gears are not meshed; the horizontal component forces of the vibration units are mutually offset, and the vertical component forces are mutually superposed to form an exciting force F, so that regular sine wave vibration is formed.

Furthermore, the eccentric shafts in the same row have the same eccentricity and the same direction, and the centrifugal forces generated by the eccentric shafts have the same magnitude and the same direction; the eccentric shafts in adjacent rows have the same eccentricity and opposite directions, and the centrifugal forces generated by the eccentric shafts have the same magnitude and opposite directions.

Further, the 4D type vibration structure includes 4, 6, 8, 10, 12, or 14 eccentric shafts.

Preferably, the 4D type vibration structure comprises 4 eccentric shafts, the 4 eccentric shafts being arranged in a diamond shape; the eccentric moments of the upper eccentric shaft and the lower eccentric shaft are both M1, the centrifugal force generated by the eccentric shafts is F1, the eccentric moment of the middle eccentric shaft is both M2, the centrifugal force generated by the eccentric shafts is F2, the sizes of M1 and M2 are the same, and the directions of the F1 and F2 are the same, and the directions of the F1 and the F2 are opposite.

The invention has the beneficial effects that:

1. the vibration structure ensures that the vibration forces in the connecting line direction of the upper eccentric shaft and the lower eccentric shaft are superposed and are not on the same line, so that the stress acting on the vibration box is symmetrically distributed; the component forces on the vertical direction of the central connecting line of the upper eccentric shaft and the lower eccentric shaft are mutually offset, and meanwhile, the rotating torques acting on the vibration box in the symmetrical direction relative to the central connecting line of the upper eccentric shaft and the lower eccentric shaft are mutually offset, so that the inclination and the shaking of the vibration box deviating from the vibration direction are avoided.

2. The gears are meshed with each other, and each gear is provided with two meshing points, so that the stress is uniform, the superposition and offset of centrifugal force components are ensured, and no deflection moment to the vibration box exists.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment 1 of the vibrating structure of the present invention;

FIG. 2 is a schematic structural diagram of embodiment 2 of the vibrating structure of the present invention;

fig. 3 is a schematic structural diagram of embodiment 3 of the vibration structure of the present invention.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific embodiments. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims.

As shown in fig. 1 to 3, a 4D type vibration structure includes an even number of at least 4 eccentric shafts, which are parallel to each other in the axial direction and have the centers of gravity in the same plane.

The eccentric shafts are symmetrically distributed along the axis connecting line of the upper gear and the lower gear to form a vibration unit through the structures of one gear at the upper end and one gear at the lower end and two gears at each row in the middle by the gears which are meshed with each other, the adjacent gears at the upper end and the lower end are meshed with each other, and the adjacent gears at the left end and the right end are not meshed with each other. The arrangement mode enables each gear to have two meshing points, the stress is uniform, the superposition and offset of centrifugal force component forces are guaranteed, and no deflection moment to the vibration box exists.

Furthermore, the eccentric shafts in the same row have the same eccentricity and the same direction, and the centrifugal forces generated by the eccentric shafts have the same magnitude and the same direction; the eccentric shafts of adjacent rows have the same eccentricity and opposite directions, and the centrifugal forces generated by the eccentric shafts have the same magnitude and opposite directions.

For convenience of explanation, a line connecting the axes of the upper eccentric shaft and the lower eccentric shaft is defined as a central axis Y, a line perpendicular to the central axis Y in a plane is defined as an X-line, the component forces in the horizontal direction (X direction) of the vibration unit are mutually offset, and the component forces in the vertical direction (central axis Y direction) are mutually superposed to form an excitation force F, so that a regular sine wave vibration is formed.

The 4D type vibration structure ensures that the vibration force in the connecting line direction (the Y direction of the central axis) of the upper eccentric shaft and the lower eccentric shaft is superposed and is not in the same line, so that the stress acting on the vibration box is symmetrically distributed; the component forces in the vertical direction (X direction) of the central connecting line of the upper eccentric shaft and the lower eccentric shaft are offset, and meanwhile, the rotating torques acting on the vibration box in the symmetrical direction relative to the central connecting line of the upper eccentric shaft and the lower eccentric shaft are offset, so that the inclination and the shaking of the vibration box deviated from the vibration direction are avoided.

Further, the 4D type vibration structure includes 4, 6, 8, 10, 12, or 14 eccentric shafts.