A 4D vibrating structure

Abstract

The present invention belongs to the technical field of road engineering machinery, and discloses a 4D vibration structure, including an even number of at least 4 eccentric shafts, the eccentric shafts are parallel to each other in axial direction and the center of gravity is in the same plane; the eccentric shafts are symmetrically distributed along the axis connecting the upper and lower gears through mutually meshing gears in a structure of one at the upper end and the lower end and two in each middle row to form a vibration unit, the upper and lower adjacent gears are meshed, and the left and right adjacent gears are not meshed; the horizontal force components of the vibration unit cancel each other out, and the vertical force components are superimposed on each other to form an exciting force F, forming a regular sinusoidal wave vibration. The vibration structure of the present invention not only ensures that the gears mesh with each other and are subjected to uniform force, but also ensures the superposition and offset of the centrifugal force components, and there is no deflection torque on the vibration box; at the same time, the eccentric shafts with the same centrifugal force are used, so that the process and maintenance are simple, and the requirements for the processing accuracy of the eccentric block are not high.

Description

Technical Field

[0001] The invention relates to the technical field of road engineering machinery, and in particular to a 4D vibration structure. Background Art

[0002] The road resonance crusher is a road crushing machine that uses resonance technology to make the vibration frequency of the vibrating hammer head close to the natural frequency of the cement road surface, thereby exciting resonance and crushing the cement road surface more easily. It has the advantages of strong power and reliable operation.

[0003] The vibration box is an important working part of the road crusher. The working principle of the vibration box is that the eccentric wheel and the gear box form a vibration unit. The output power of the gear box drives the eccentric wheel to rotate. Under the action of the eccentric wheel, the vibration box is driven to vibrate, and the vibration head is driven to beat the ground to break the road surface. The vibration shaft of the traditional vibration box is arranged horizontally. When the power of the vibration system needs to be increased, the number of vibration shafts needs to be increased, and the lateral size of the entire vibration box will increase, making it difficult to enter narrow areas for construction.

[0004] In order to solve the problem that the lateral size of the vibration box is large due to the lateral arrangement of the vibration shaft, the prior art has developed 3X type (see Chinese patent application number 2015103648186 for details) and 4Z type (see Chinese patent application number 2018110260164 for details) vibration structures with longitudinally arranged vibration shafts. However, when the 3X type vibration structure offsets the horizontal force, it is necessary to accurately calculate the size of the eccentric wheel. If there is a deviation in the calculation or processing, it will cause the vibration box to shake more seriously in the horizontal direction. Due to the inevitability of errors, the 3X vibration structure has the disadvantages of poor working stability and short service life of the equipment. Although the 4Z type structure has two opposite forces of the same magnitude in the horizontal direction, there is a deflection torque around the center of the vibration box, which makes the vibration box shake significantly in the left and right directions during operation. At the same time, regardless of the 3X or 4Z type structure, the middle part of the gears are two meshing points, and the upper and lower gears are one meshing point, so that the gear meshing forces are different, resulting in uneven force and wear of the gears, and short gear life. Summary of the invention

[0005] In order to overcome the shortcomings of the existing vibration structure, such as the difficulty in accurate calculation and processing of the eccentric wheel (3X type), the uneven force distribution of the gears, the deflection torque generated by the eccentric shaft causing the vibration box to shake left and right (4Z type), the present invention provides a 4D vibration structure, which can ensure that the gears are meshed with each other with uniform force, and can also ensure the superposition and offset of centrifugal force components, without deflection torque on the vibration box; at the same time, the eccentric shaft with the same centrifugal force is used, which makes the process and maintenance simple, and does not require high processing accuracy of the eccentric block.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A 4D vibration structure comprises an even number of at least 4 eccentric shafts, wherein the eccentric shafts are parallel to each other in axial direction and their centers of gravity are in the same plane; the eccentric shafts are symmetrically distributed along the axis connecting the upper and lower gears through mutually meshing gears in a structure of one each at the upper end and the lower end and two in each row in the middle to form a vibration unit, wherein the upper and lower adjacent gears are meshed, and the left and right adjacent gears are not meshed; the horizontal force components of the vibration unit cancel each other out, and the vertical force components are superimposed on each other to form an exciting force F, thereby forming a regular sinusoidal wave vibration.

[0008] Furthermore, the eccentricities of the eccentric shafts in the same row are the same in magnitude and direction, and the centrifugal forces generated by the eccentric shafts are the same in magnitude and direction; the eccentricities of the eccentric shafts in adjacent rows are the same in magnitude and opposite in direction, and the centrifugal forces generated by the eccentric shafts are the same in magnitude and opposite in direction.

[0009] Furthermore, the 4D vibration structure includes 4, 6, 8, 10, 12 or 14 eccentric shafts.

[0010] Preferably, the 4D vibration structure includes four eccentric shafts, and the four eccentric shafts are arranged in a diamond shape; the eccentric moments of the upper and lower eccentric shafts are both M1, and the centrifugal force generated by the eccentric shafts is F1; the eccentric moments of the middle eccentric shafts are both M2, and the centrifugal force generated by the eccentric shaft is F2; ​​M1 and M2 are the same in magnitude and opposite in direction, and F1 and F2 are the same in magnitude and opposite in direction.

[0011] The beneficial effects of the present invention are:

[0012] 1. The vibration structure of the present invention ensures that the vibration forces in the direction of the line connecting the upper and lower eccentric shafts are superimposed, and at the same time are not in the same line, so that the forces acting on the vibration box are symmetrically distributed; the components of force in the vertical direction of the line connecting the centers of the upper and lower eccentric shafts cancel each other out, and at the same time, the rotational torques acting on the vibration box in the symmetrical direction relative to the line connecting the centers of the upper and lower eccentric shafts cancel each other out, thereby avoiding the tilting and shaking of the vibration box deviating from the vibration direction.

[0013] 2. The gears of the present invention mesh with each other, and each gear has two meshing points, so the force is evenly applied, which ensures the superposition and offset of centrifugal force components and has no deflection torque on the vibration box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the vibration structure embodiment 1 of the present invention;

[0015] Figure 2 This is a schematic structural diagram of Embodiment 2 of the vibration structure of the present invention;

[0016] Figure 3 It is a structural schematic diagram of embodiment 3 of the vibration structure of the present invention. DETAILED DESCRIPTION

[0017] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. The present invention can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and the concept of the present invention will be fully conveyed to those skilled in the art, and the present invention will only be limited by the claims.

[0018] like Figure 1-3 As shown, a 4D vibration structure includes an even number of and at least 4 eccentric shafts, the axial directions of the eccentric shafts are parallel to each other and the centers of gravity are in the same plane.

[0019] The eccentric shaft is symmetrically distributed along the axis connecting the upper and lower gears through meshing gears, one at the upper and lower ends, and two in each row in the middle, to form a vibration unit. The upper and lower adjacent gears are meshed, and the left and right adjacent gears are not meshed. This arrangement allows each gear to have two meshing points and evenly bear force, which ensures the superposition and offset of centrifugal force components and has no deflection torque on the vibration box.

[0020] Furthermore, the eccentricities of the eccentric shafts in the same row are the same in magnitude and direction, and the centrifugal forces generated by the eccentric shafts are the same in magnitude and direction; the eccentricities of the eccentric shafts in adjacent rows are the same in magnitude and opposite in direction, and the centrifugal forces generated by the eccentric shafts are the same in magnitude and opposite in direction.

[0021] For the convenience of explanation, the line connecting the axes of the upper and lower eccentric shafts is defined as the central axis Y, and the line in the same plane and perpendicular to it is defined as the X line. The components of the force in the horizontal direction (X direction) of the vibration unit cancel each other out, and the components of the force in the vertical direction (central axis Y direction) are superimposed on each other to form an exciting force F, forming a regular sinusoidal wave vibration.

[0022] The 4D vibration structure ensures that the vibration forces in the direction of the line connecting the upper and lower eccentric shafts (the Y direction of the central axis) are superimposed, and at the same time are not in the same line, so that the forces acting on the vibration box are symmetrically distributed; the component forces in the vertical direction (X direction) of the line connecting the centers of the upper and lower eccentric shafts cancel each other out, and at the same time, the rotational torques acting on the vibration box in the symmetrical direction relative to the line connecting the centers of the upper and lower eccentric shafts cancel each other out, thus avoiding the vibration box from tilting and shaking away from the vibration direction.

[0023] Furthermore, the 4D vibration structure includes 4, 6, 8, 10, 12 or 14 eccentric shafts.

[0024] Example 1

[0025] The 4D vibration structure includes four eccentric shafts arranged in a diamond shape. Figure 1As shown; the eccentric moments of the upper and lower eccentric shafts are both M1, and the centrifugal force generated by the eccentric shaft is F1; the eccentric moments of the middle eccentric shaft are both M2, and the centrifugal force generated by the eccentric shaft is F2; ​​M1 and M2 are the same in magnitude but opposite in direction, and F1 and F2 are the same in magnitude but opposite in direction.

[0026] Different from the traditional eccentric shaft vibration mode, the direction of the exciting force F is the line connecting the upper and lower eccentric shaft axes, and the two exciting forces are symmetrically distributed relative to the axis, while ensuring that the force on the gear is uniform.

[0027] If a vibration with a greater exciting force (or greater vibration energy) is to be achieved, the eccentric weight of the eccentric shaft or the eccentric mass may be increased, or the number of the eccentric shafts or the eccentric mass may be increased.

[0028] This embodiment effectively eliminates the ineffective force components outside the vibration direction, ensures the effective superposition of the force components in the vibration direction, realizes sinusoidal wave vibration in the vibration direction, and arranges the eccentric shafts in a diamond shape to ensure uniform force on the gear meshing. The centrifugal force of each eccentric shaft is the same and they are arranged symmetrically to ensure that the force components are offset and the load is evenly distributed.

[0029] Example 2

[0030] The 4D vibration structure includes 6 eccentric shafts, such as Figure 2 As shown, two eccentric shafts are arranged, one at the upper end and one at the lower end, and two rows in the middle. The horizontal force components of the vibration units cancel each other out, and the vertical force components are superimposed on each other to form an exciting force F, forming a regular sinusoidal wave vibration.

[0031] Example 3

[0032] The 4D vibration structure includes 8 eccentric shafts, such as Figure 3 As shown, two eccentric shafts are arranged, one at the upper end and one at the lower end, and two in each of the three middle rows. The horizontal force components of the vibration units cancel each other out, and the vertical force components are superimposed on each other to form an exciting force F, forming a regular sinusoidal wave vibration.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A 4D vibration structure, characterized in that: It comprises an even number of at least 4 eccentric shafts, the axial directions of the eccentric shafts are mutually parallel and the centers of gravity are in the same plane; the eccentric shafts are symmetrically distributed along the axis connecting the upper and lower gears through mutually meshing gears in a structure of one each at the upper end and the lower end and two in each row in the middle to form a vibration unit, the upper and lower adjacent gears are meshed, and the left and right adjacent gears are not meshed; the horizontal force components of the vibration unit cancel each other out, and the vertical force components are superimposed on each other to form an exciting force F, forming a regular sinusoidal wave vibration.

2. A 4D vibration structure according to claim 1, characterized in that: The eccentricities of the eccentric shafts in the same row are of the same magnitude and direction, and the centrifugal forces generated by the eccentric shafts are of the same magnitude and direction; the eccentricities of the eccentric shafts in adjacent rows are of the same magnitude and opposite directions, and the centrifugal forces generated by the eccentric shafts are of the same magnitude and opposite directions.

3. A 4D vibration structure according to claim 1, characterized in that: The 4D vibration structure includes four eccentric shafts, which are arranged in a diamond shape; the eccentric moments of the upper and lower eccentric shafts are both M1, and the centrifugal force generated by the eccentric shafts is F1; the eccentric moments of the middle eccentric shafts are both M2, and the centrifugal force generated by the eccentric shaft is F2; ​​M1 and M2 are of the same magnitude and opposite directions, and F1 and F2 are of the same magnitude and opposite directions.

4. A 4D vibration structure according to claim 1, characterized in that: The 4D vibration structure includes 4, 6, 8, 10, 12 or 14 eccentric shafts.

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