Eccentricity-adjustable eccentric assembly and inertial exciter

Abstract

The utility model relates to an eccentricity adjustable eccentric assembly and inertial exciter, and relates to the technical field of exciter, the technical scheme that adopts includes base, eccentric block and apron, the eccentric block includes T type pipe, the first end of T type pipe extends along the radial direction of transmission shaft, the first end, second end, third end of T type pipe all are slidably connected with piston, the first end, second end, third end opening all are provided with the baffle, three pistons and T type pipe surround and form an adjusting cavity, and the adjusting cavity is filled with liquid, the baffle between the first end and piston is provided with drive arrangement, and the baffle between the second end, third end and piston is provided with compression spring, the utility model changes the position of liquid in adjusting cavity relative to transmission shaft through drive arrangement, changes the mass distribution and eccentricity of eccentric assembly, keeps eccentric mass unchanged, and realizes infinitely variable adjustment to exciting force under the working state of exciter in combination with rotary joint.

Description

Technical Field

[0001] This invention relates to the field of exciter technology, and more particularly to an eccentric component with adjustable eccentricity and an inertial exciter. Background Technology

[0002] A vibrator is a device attached to certain vibrating equipment to generate excitation force. It is an important component utilizing mechanical vibration. Currently, the eccentric block external inertial vibrator is widely used. Its overall structure is lightweight, compact, with centralized lubrication of transmission components, convenient maintenance, and low manufacturing cost. However, when adjusting the excitation force, it is often necessary to stop the machine first and then adjust the angle between the two eccentric blocks. This does not allow for stepless adjustment of the excitation force during operation, resulting in low efficiency. Summary of the Invention

[0003] To address the problem that existing technologies cannot achieve stepless adjustment of the excitation force during the operation of the exciter, this invention provides an eccentric component with adjustable eccentricity and an inertial exciter.

[0004] This invention provides the following technical solution: an eccentric component with adjustable eccentricity, comprising:

[0005] The base includes a limiting groove and a connecting clamp for connection with the drive shaft;

[0006] An eccentric block is disposed within the limiting groove. The eccentric block includes a T-shaped tube, the first end of which extends radially along the drive shaft. A piston is slidably connected to the first, second, and third ends of the T-shaped tube. A sealing plate is provided at the opening of the first, second, and third ends. The three pistons and the T-shaped tube form an adjustment chamber filled with liquid. A driving device is provided between the sealing plate at the first end and the piston, and a compression spring is provided between the sealing plate at the second and third ends and the piston; or a driving device is provided between the sealing plate at the second and third ends and the piston, and a compression spring is provided between the sealing plate at the first end and the piston.

[0007] The cover plate covers the opening of the limiting groove.

[0008] Preferably, the second end and the third end are symmetrical about the central axis of the first end.

[0009] Preferably, the cross-sectional area of ​​the first end is larger than that of the second end and the third end.

[0010] Preferably, the liquid is a heavy liquid.

[0011] Preferably, the driving device includes a venting port between the sealing plate and the piston at the first end, the second end, or the third end, and the venting port is connected to an air source via a rotary joint.

[0012] Preferably, the driving device is a push rod disposed between the sealing plate and the piston at the first end, the second end, or the third end, and the push rod is electrically connected to a rotary joint.

[0013] Preferably, the base is further provided with a plurality of positioning posts, the outer wall of the T-shaped tube is provided with a positioning sleeve that is inserted into the positioning posts, and the positioning posts are also threadedly connected with fastening nuts.

[0014] Preferably, a counterweight is provided on the side of the limiting groove away from the connecting clamp.

[0015] An inertial exciter includes a drive motor, a transmission shaft connected to the output shaft of the drive motor, and an eccentric assembly disposed on the transmission shaft. The eccentric assembly is an eccentric assembly with adjustable eccentricity. The transmission shaft is also provided with a rotary joint.

[0016] Preferably, the drive motor is a dual-output shaft motor, and bearing seats are provided on both sides of the drive motor. The two bearing seats are symmetrical about the central axis of the drive motor. The bearing seats are rotatably connected to transmission shafts, and the two transmission shafts are respectively connected to the two ends of the output shaft of the drive motor. The eccentric components and rotary joints are provided on both sides of the bearing seats, and the two eccentric components are symmetrical about the central axis of the bearing seats.

[0017] The beneficial effects of this invention are: by actively changing the position of the liquid in the regulating chamber relative to the transmission shaft through the driving device, the mass distribution and eccentricity of the eccentric component are changed, the eccentric mass remains unchanged, and the stepless adjustment of the excitation force is achieved in the working state of the vibrator by combining the rotary joint. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one embodiment of an eccentric component.

[0019] Figure 2 This is a schematic diagram of one embodiment of the base.

[0020] Figure 3 This is a schematic diagram of one embodiment of an eccentric block.

[0021] Figure 4 This is a front view of one embodiment of the eccentric component.

[0022] Figure 5 This is a schematic diagram of one embodiment of an inertial exciter.

[0023] Figure 6 This is a partially enlarged view of one embodiment of an inertial exciter.

[0024] Reference numerals: 10. Base; 11. Limiting groove; 12. Connecting clamp; 13. Positioning post; 14. Reinforcing rib; 15. Counterweight; 16. Protective plate; 17. Buffer filling layer; 20. Eccentric block; 21. T-tube; 211. First end; 212. Second end; 213. Third end; 22. Piston; 23. Sealing plate; 24. Liquid; 25. Compression spring; 26. Vent port; 27. Positioning sleeve; 30. Cover plate; 40. Drive motor; 50. Transmission shaft; 51. Bearing seat; 60. Eccentric assembly; 70. Rotary joint. Detailed Implementation

[0025] The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0026] Example 1

[0027] This invention provides, for example Figure 1-4 An eccentric assembly with adjustable eccentricity is shown, including a base 10, an eccentric block 20 disposed on the base, and a cover plate 30.

[0028] The base 10 is used to fix and protect the eccentric block 20 and connect it to the drive shaft. Please refer to... Figure 1-2 In this embodiment, the base 10 includes a limiting groove 11 and a connecting clamp 12 for connecting to the drive shaft. Reinforcing ribs 14 are connected between the connecting clamp 12 and the limiting groove 11 on both sides. A counterweight 15 is also provided on the side of the limiting groove 11 away from the connecting clamp 12. The limiting groove 11 is formed into a T-shape by the protective plate 16 and the counterweight 15 mounted on the base 10, and is provided with a buffer filling layer 17 made of rubber or other elastic material to fill the gap between the two after the eccentric block 20 is placed into the limiting groove 11, so that the limiting groove 11 mates with the T-shaped tube 21 of the eccentric block 20. The connecting clamp 12 can refer to existing technology. The counterweight 15 is integrally formed with the base 10 to increase the lower limit of the excitation force. The cover plate 30 can be bolted to the base 10, covering the opening of the limiting groove 11. A buffer filling layer 17 is also provided on the side facing the eccentric block 20 to protect the T-shaped tube 21.

[0029] The base 10 is also provided with multiple positioning posts 13. The outer wall of the T-shaped tube 21 is provided with positioning sleeves 27 that are inserted into the positioning posts 13. The guard plate 16 and the counterweight block 15 are provided with notches that cooperate with the positioning sleeves 27. The positioning posts 13 are also threaded with fastening nuts. During installation, the eccentric block 20 is placed in the limiting groove 11, the positioning sleeves 27 of the T-shaped tube 21 are inserted into the positioning posts 13, and then the limiting groove 11 is closed with bolts to install the cover plate 30, which completely fixes the T-shaped tube 21 to the base 10 and protects the eccentric block 20.

[0030] Please refer to Figure 1 , 3 The eccentric block 20 includes a T-shaped tube 21. The first end 211 of the T-shaped tube 21 extends radially along the drive shaft, and its second end 212 and third end 213 extend outwards from both sides of the first end 211. In this embodiment, the second end 212 and third end 213 are symmetrical about the central axis x1 of the first end 211, ensuring a uniform mass distribution of the eccentric block. A piston 22 is slidably connected inside each of the first end 211, second end 212, and third end 213 of the T-shaped tube 21. A sealing plate 23 is provided at the opening of each of the first end 211, second end 212, and third end 213, and the sealing plate 23 can be threaded into the T-shaped tube. The three pistons 22 and the T-shaped tube 21 form an adjustment chamber filled with liquid 24.

[0031] In this embodiment, a driving device is provided between the sealing plate 23 and the piston 22 at the first end 211, and a compression spring 25 is provided between the sealing plate 23 and the piston 22 at the second end 212 and the third end 213. The driving device actively changes the position of the piston in the first end 211, and the compression spring passively adapts to the positions of the pistons in the second and third ends, driving the liquid 24 to flow, changing the mass distribution of the eccentric block 20, thereby changing the eccentricity of the eccentric block relative to the transmission shaft and the magnitude of the excitation force. Please refer to... Figure 1 The drive unit moves the piston upward, the pressure spring returns to its original position, and the liquid filler moves closer to the drive shaft and the first end of the connecting clamp, reducing the eccentricity; please refer to... Figure 3 The driving device drives the piston downward, causing the liquid 24 to flow to the second and third ends and overcoming the elastic force of the compression spring, thus increasing the eccentricity. Within the stroke range of the piston at the first end, the excitation force can be infinitely adjusted. In other embodiments, the driving device is disposed between the sealing plate 23 of the second end 212 and the third end 213 and the piston 22, and a compression spring 25 is disposed between the sealing plate 23 of the first end 211 and the piston 22.

[0032] Please refer to Figure 3The driving device includes a vent 26 disposed between the sealing plate 23 and the piston 22 at the first end 211. The vent 26 is connected to a gas source via a pipe and a rotary joint. The gas source can refer to existing pneumatic systems. The rotary joint uses a gas slip ring to deliver gas during the rotation of the eccentric assembly, allowing the excitation force to be adjusted during operation. Adjustment is achieved by changing the pressure between the sealing plate and the piston at the first end 211 using compressed gas as the working medium, eliminating the need for additional components to increase the length or volume of the first end 211. The liquid 24 can be a high-density liquid, such as a heavy liquid, which can effectively increase the excitation force generated by the eccentric assembly; more specifically, Klerich liquid can be used, with a relative density of up to 4.25 and inert chemical properties.

[0033] In other embodiments, the driving device may be a push rod disposed between the sealing plate 23 and the piston 22 at the first end 211. The push rod may be an electric telescopic rod, electrically connected to a power supply and controller via a rotary joint, which may be an electric slip ring. This invention does not limit the installation position and form of the driving device; various installation positions and forms can be flexibly combined to achieve the adjustment method described in this invention.

[0034] Preferably, the cross-sectional area of ​​the first end 211 is greater than that of the second end 212 and the third end 213, and a preferred ratio of the cross-sectional areas of the first end, the second end and the third end is 2:1:1, so as to control the length of the first end 211.

[0035] Example 2

[0036] The present invention provides an inertial exciter, including a drive motor 40, a transmission shaft 50 connected to the output shaft of the drive motor 40, and an eccentric component 60 disposed on the transmission shaft 50. The eccentric component 60 is the eccentric component described in Embodiment 1. The transmission shaft 50 is also provided with a rotary joint 70, which is a gas slip ring, and can realize stepless adjustment of the excitation force during the operation of the exciter.

[0037] Example 3

[0038] This invention provides, for example Figure 5 , 6The illustrated inertial exciter features a dual-output-shaft drive motor 40. Bearing seats 51 are located on both sides of the drive motor 40, symmetrical about the central axis x2 of the drive motor 40. Each bearing seat 51 is rotatably connected to a transmission shaft 50, which is respectively connected to both ends of the output shaft of the drive motor 40. Eccentric components 60 and rotary joints 70 are located on both sides of each bearing seat 51, symmetrical about the central axis x3 of the bearing seat 51. The eccentric components 60 are the same as those described in Embodiment 1. This embodiment not only enables stepless adjustment of the excitation force during operation but also provides a stronger excitation force and achieves high speed.

[0039] The above describes one or more embodiments of the present invention in a relatively specific and detailed manner, but it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An eccentric component with adjustable eccentricity, characterized in that, include: The base includes a limiting groove and a connecting clamp for connection with the drive shaft; An eccentric block is disposed within the limiting groove. The eccentric block includes a T-shaped tube, the first end of which extends radially along the drive shaft. A piston is slidably connected to the first, second, and third ends of the T-shaped tube. A sealing plate is provided at the opening of the first, second, and third ends. The three pistons and the T-shaped tube form an adjustment chamber filled with liquid. A driving device is provided between the sealing plate at the first end and the piston, and a compression spring is provided between the sealing plate at the second and third ends and the piston; or a driving device is provided between the sealing plate at the second and third ends and the piston, and a compression spring is provided between the sealing plate at the first end and the piston. The cover plate covers the opening of the limiting groove.

2. The eccentric component with adjustable eccentricity according to claim 1, characterized in that, The second and third ends are symmetrical about the central axis of the first end.

3. The eccentric component with adjustable eccentricity according to claim 2, characterized in that, The cross-sectional area of ​​the first end is larger than that of the second end and the third end.

4. The eccentric component with adjustable eccentricity according to claim 1, characterized in that, The liquid is a heavy liquid.

5. An eccentric component with adjustable eccentricity according to claim 1, characterized in that, The driving device includes a venting port between the sealing plate and the piston at the first end, the second end, or the third end, and the venting port is connected to an air source via a rotary joint.

6. An eccentric component with adjustable eccentricity according to claim 1, characterized in that, The driving device is a push rod disposed between the sealing plate and the piston at the first, second, or third end, and the push rod is electrically connected to a rotary joint.

7. An eccentric component with adjustable eccentricity according to claim 1, characterized in that, The base is also provided with multiple positioning posts, and the outer wall of the T-shaped tube is provided with a positioning sleeve that is inserted into the positioning post. The positioning post is also threadedly connected with a fastening nut.

8. An eccentric component with adjustable eccentricity according to claim 1, characterized in that, A counterweight is provided on the side of the limiting groove away from the connecting clamp.

9. An inertial exciter, comprising a drive motor, a transmission shaft connected to the output shaft of the drive motor, and an eccentric assembly disposed on the transmission shaft, characterized in that, The eccentric component is the eccentric component according to any one of claims 1-7, and the drive shaft is further provided with a rotary joint.

10. An inertial exciter according to claim 9, characterized in that, The drive motor is a dual-output shaft motor. Bearing seats are provided on both sides of the drive motor. The two bearing seats are symmetrical about the central axis of the drive motor. The bearing seats are rotatably connected to transmission shafts. The two transmission shafts are respectively connected to the two ends of the output shaft of the drive motor. The eccentric components and rotary joints are provided on both sides of the bearing seats. The two eccentric components are symmetrical about the central axis of the bearing seats.

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