Vibrating bar eccentric shaft

Abstract

The utility model discloses a vibrating bar eccentric shaft which comprises a first connecting part, an eccentric part and a second connecting part, and the two ends of the eccentric part are connected with the first connecting part and the second connecting part respectively. The first connecting part and the second connecting part are coaxially arranged and are respectively used for being rotationally connected with a shell; the second connecting part is connected with the transmission shaft and used for driving the vibration shaft to rotate; the cross section of the eccentric part is in a superior arch shape, the outer surface, in the axis direction, of the eccentric part is defined by a plane and an arc surface, and a first reinforcing part is arranged on the plane and located on any side, close to the two sides of the arc surface, of the plane. The eccentric part is provided with the reinforcing part, so that the structural strength of the eccentric part is improved, and the vibration shaft is prevented from bending under the action of centrifugal force during high-speed rotation. The first reinforcing part is located on one side, close to the arc face, of the plane, the distance between the mass center and the rotating axis after the eccentric part and the first reinforcing part are combined is increased, the overall mass is improved, and the vibrating force is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction equipment, and in particular relates to an eccentric shaft of a vibrating rod. Background Art

[0002] Concrete is a building material widely used in the construction industry. Since concrete contains a large amount of gas and moisture after mixing, in order for the concrete to reach its designed strength, the bubbles must be removed, its density must be ensured, and tamping must be carried out to make the concrete densely combined and eliminate the honeycombed surface of the concrete, so as to improve its strength and ensure the quality of concrete components.

[0003] During the pouring of concrete, a vibrator is usually used to vibrate and expel gas. The vibrator consists of a driver, a hose, a vibrator and other components. It generates high-frequency vibrations to quickly expel bubbles from the components, so that cement, sand and gravel and the steel frame are tightly connected together, improving the compactness of the concrete.

[0004] The vibrating rod includes a shell and a vibrating shaft. The vibrating shaft rotates in the shell to make the vibrating rod generate high-frequency vibrations. The amplitude and force of the vibration of the vibrating rod are called the vibrating force. The magnitude of the vibrating force directly affects the size of the effective vibrating area. Increasing the vibrating force is the key way to increase the effective vibrating area. The factors that affect the vibrating force mainly include the rotation speed of the vibrating shaft, the mass of the vibrating shaft, and the distance from the center of mass of the vibrating shaft to the center of rotation. How to increase the vibrating force without changing the structure of the vibrating rod shell is a major technical problem in the field of vibrating rods. Utility Model Content

[0005] The utility model provides an eccentric shaft of a vibrating rod, which can improve the vibrating force generated by the vibrating rod under the condition that the speed of the driver and the shell structure remain unchanged. The specific technical scheme is as follows:

[0006] A vibrating rod eccentric shaft comprises a first connecting portion, an eccentric portion and a second connecting portion, wherein two ends of the eccentric portion are respectively connected to the first connecting portion and the second connecting portion; the first connecting portion and the second connecting portion are coaxially arranged and are respectively used for rotationally connecting to an outer shell; the second connecting portion is connected to a transmission shaft and is used for driving the vibrating shaft to rotate; the cross-section of the eccentric portion is in the shape of a superior arc, and the outer surface of the eccentric portion along the axial direction is surrounded by a plane and an arc surface, a first reinforcement portion is arranged on the plane, and the first reinforcement portion is located on any side of the plane close to both sides of the arc surface.

[0007] Through the above technical solution, a reinforcement part is provided on the eccentric part to improve the structural strength of the eccentric part and prevent it from bending under the action of centrifugal force when the vibration shaft rotates at high speed. The first reinforcement part is located on one side of the plane close to the arc surface, and the distance between the center of mass of the combination of the eccentric part and the first reinforcement part and the center of rotation axis and the overall mass are increased to improve the vibration force.

[0008] Preferably, the eccentric portion and the first reinforcement portion are integrally formed.

[0009] Through the above technical solution, the structural strength of the connection between the eccentric part and the first reinforcement part is enhanced.

[0010] Preferably, the surface of the first reinforcement portion close to the curved surface is curved, and the curved surface of the reinforcement portion is concentrically arranged with the curved surface of the eccentric portion.

[0011] Through the above technical solution, the center of mass of the first reinforcement part is kept away from the rotation axis as far as possible.

[0012] Preferably, the ratio of the distance a from the arc center to the chord of the eccentric portion to the arc radius r is 1:4.5-5.

[0013] Through the above technical solution, the vibration force generated by combining the two influencing factors of the distance between the center of mass of the eccentric part and the center of rotation axis and the mass of the eccentric part is greater.

[0014] Preferably, the ratio of the distance a from the arc center to the chord of the eccentric portion to the arc radius r is 1:4.75.

[0015] Preferably, the ratio of the width b of the first reinforcement portion to the plane width c of the eccentric portion is 1:4-5, and the ratio of the height d of the first reinforcement portion to the width b of the first reinforcement portion is 1:0.8-1.2.

[0016] Through the above technical solution, the overall center of mass of the first reinforcement part and the eccentric part is further away from the rotation axis.

[0017] Preferably, the ratio of the width b of the first reinforcement portion to the plane width c of the eccentric portion is 1:4.5, and the ratio of the height d of the first reinforcement portion to the width b of the first reinforcement portion is 1:1.

[0018] Preferably, a second reinforcement portion is provided at a connection between the eccentric portion and the first connection portion, and a third reinforcement portion is provided at a connection between the eccentric portion and the second connection portion.

[0019] Through the above technical solution, the connection strength between the eccentric part and the first connection part and the connection strength between the eccentric part and the second connection part are increased.

[0020] Preferably, the second connecting portion is provided with threads, and the threads are used to connect with the transmission shaft.

[0021] Through the above technical solution, the connection between the second connecting part and the transmission shaft is made simpler and convenient for assembly and disassembly.

[0022] The beneficial effects of the utility model are:

[0023] 1. The first reinforcement portion provided on the eccentric portion enhances the structural strength of the eccentric portion.

[0024] 2. The first reinforcement part is arranged on one side of the plane close to the arc surface to increase the distance between the center of mass of the vibration shaft and the center of rotation to increase the vibration force.

[0025] 3. The first reinforcement part also increases the overall mass of the eccentric part to increase the vibration force. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1 It is a front view of Example 1;

[0028] Figure 2 for Figure 1 AA section view;

[0029] Figure 3 is a stereogram of Example 1;

[0030] 1. First connecting portion, 2. Eccentric portion, 21. First reinforcing portion, 22. Second reinforcing portion, 23. Third reinforcing portion, 3. Second connecting portion. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1

[0034] like Figure 1-3As shown, an eccentric shaft of a vibrating rod comprises a first connecting portion 1, an eccentric portion 2 and a second connecting portion 3, wherein the first connecting portion 1, the eccentric portion 2 and the second connecting portion 3 are integrally formed, and the outer surface of the eccentric portion 2 along the axial direction is enclosed by a plane and an arc surface, and a first reinforcing portion 21 is arranged on the plane, and the first reinforcing portion 21 is located on any side of the plane close to the two sides of the arc surface, and the eccentric portion 2 and the first reinforcing portion 21 are integrally formed, and the surface of the first reinforcing portion 21 close to the arc surface is arc-shaped, and the arc surface of the reinforcing portion is concentrically arranged with the arc surface of the eccentric portion 2. The reinforcing portion can strengthen the structural strength of the eccentric portion 2, and at the same time, its position on the eccentric portion 2 is designed so that the distance between the center of mass and the rotation axis after the reinforcing portion and the eccentric portion 2 are combined is farther.

[0035] The first connection part 1 and the second connection part 3 are respectively located at the two ends of the eccentric part 2, and a second reinforcement part 22 is provided at the connection between the eccentric part 2 and the first connection part 1, and a third reinforcement part 23 is provided at the connection between the eccentric part 2 and the second connection part 3. The connection strength between the eccentric part and the first connection part and the connection strength between the eccentric part and the second connection part are strengthened.

[0036] The first connection part 1 and the second connection part 3 are coaxially arranged and are respectively used for rotational connection with the outer shell. Specifically, the first connection part 1 is rotationally connected to the outer shell at the end of the vibrating rod through a bearing. The second connection part 3 is rotationally connected to the outer shell at one end of the vibrating rod close to the driving mechanism through a rotating shaft. The second connection part 3 is provided with a thread 31, and the thread 31 is used to connect with the transmission shaft. The vibration shaft can rotate in the vibrating rod under the drive of the driving mechanism.

[0037] The cross section of the eccentric part 2 is in the shape of a superior arc, so that the center of mass of the eccentric part 2 and the center of rotation are not in the same straight line. When the eccentric part 2 rotates under the drive of the driving mechanism, the vibrating rod generates high-frequency vibration under the action of centrifugal force.

[0038] The outer surface of the eccentric part 2 along the axial direction is formed by a plane and an arc surface, and a first reinforcing part 21 is provided on the plane. The first reinforcing part 21 is located on either side of the plane close to the arc surface. The eccentric part 2 and the first reinforcing part 21 are integrally formed, and the surface of the first reinforcing part 21 close to the arc surface is arc-shaped, and the arc surface of the reinforcing part is concentrically arranged with the arc surface of the eccentric part 2. The reinforcing part can enhance the structural strength of the eccentric part 2, and at the same time, its position on the eccentric part 2 is designed so that the distance between the center of mass and the rotation axis after the reinforcing part and the eccentric part 2 are combined is farther.

[0039] Specifically, the ratio of the distance a from the arc center to the chord of the eccentric portion 2 to the arc radius r is 1:4.5-5, preferably 1:4.75. The ratio of the width b of the first reinforcement portion 21 to the plane width c of the eccentric portion 2 is 1:4-5, preferably 1:4.5. The ratio of the height d of the first reinforcement portion 21 to the width b of the first reinforcement portion 21 is 1:0.8-1.2, preferably 1:1.

[0040] A second reinforcement portion 22 is provided at a connection between the eccentric portion 2 and the first connection portion 1 , and a third reinforcement portion 23 is provided at a connection between the eccentric portion 2 and the second connection portion 3 .

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A vibrating rod eccentric shaft, characterized in that: The invention comprises a first connecting part (1), an eccentric part (2) and a second connecting part (3), wherein two ends of the eccentric part (2) are respectively connected to the first connecting part (1) and the second connecting part (3); the first connecting part (1) and the second connecting part (3) are coaxially arranged and respectively used for rotationally connecting to the outer shell; the second connecting part (3) is connected to the transmission shaft and used for driving the vibration shaft to rotate; the cross section of the eccentric part (2) is in the shape of a superior arc, and the outer surface of the eccentric part (2) along the axial direction is formed by a plane and an arc surface, and a first reinforcing part (21) is arranged on the plane, and the first reinforcing part (21) is located on any one side of the plane close to the two sides of the arc surface.

2. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The eccentric portion (2) and the first reinforcement portion (21) are integrally formed.

3. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The surface of the first reinforcement portion (21) close to the curved surface is curved, and the curved surface of the reinforcement portion is arranged concentrically with the curved surface of the eccentric portion (2).

4. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The ratio of the distance a from the arc center to the chord of the eccentric part (2) to the arc radius r is 1:4.5-5.

5. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The ratio of the distance a from the arc center to the chord of the eccentric part (2) to the arc radius r is 1:4.

75.

6. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The ratio of the width b of the first reinforcement part (21) to the plane width c of the eccentric part (2) is 1:4-5, and the ratio of the height d of the first reinforcement part (21) to the width b of the first reinforcement part (21) is 1:0.8-1.

2.

7. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The ratio of the width b of the first reinforcement portion (21) to the plane width c of the eccentric portion (2) is 1:4.5, and the ratio of the height d of the first reinforcement portion (21) to the width b of the first reinforcement portion (21) is 1:

1.

8. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The first connecting portion (1), the eccentric portion (2) and the second connecting portion (3) are integrally formed.

9. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: A second reinforcement portion (22) is provided at the connection between the eccentric portion (2) and the first connection portion (1), and a third reinforcement portion (23) is provided at the connection between the eccentric portion (2) and the second connection portion (3).

10. The eccentric shaft of a vibrating rod according to claim 1, characterized in that: The second connecting portion (3) is provided with a thread (31), and the thread (31) is used for connecting with the transmission shaft.

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