A pneumatic vibrator

Abstract

The present invention discloses a pneumatic vibrator, characterized in that it includes a shell, a second cover plate, a magnetic core, a shaft seat and an air inlet shaft; a shaft hole is provided at the center of the upper end of the shell, a cavity is formed below the shaft hole, the second cover plate is close to the top wall of the cavity, the shaft seat is located at the lower end of the cavity, and a shaft hole is also provided at the center of the shaft seat, the second cover plate and the shaft seat are both sealed and connected to the shell, the air inlet shaft is sealed and fixedly installed in the shaft seat and the shaft hole of the shell, a chamber is formed between the second cover plate and the shaft seat, the magnetic core is sleeved with the air inlet shaft in the chamber, the air inlet shaft is provided with a blind hole, and a plurality of radial through holes are provided at the lower end of the blind hole, the shaft seat is provided with an air inlet channel connected to the chamber at the corresponding through hole, and an air outlet channel is provided from the chamber through the second cover plate and the shell to the outside of the shell. The vibration frequency and vibration intensity of the vibrator of the present invention are good in adjustability, light weight, small size, small heat generation and good safety.

Description

Technical Field

[0001] The invention relates to the field of vibrators, and in particular to a pneumatic vibrator. Background Art

[0002] Most existing vibrators are electrically driven. The working part is a rod-shaped hollow cylinder with an eccentric vibrator installed inside. It rotates at high speed driven by the motor to produce high-frequency and slight vibrations. Electric-driven vibrators are limited by the motor, and the frequency and vibration intensity are poorly adjustable. They are heavy and large in size. In addition, the vibrator of the electric-driven vibrator is easy to wear, and it is easy to generate a lot of heat during operation. The working life is short and the safety is poor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pneumatic vibrator with good adjustability of vibration frequency and vibration intensity, light weight, small volume, small heat generation and good safety.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0005] A pneumatic vibrator, characterized in that it includes a shell, a second cover plate, a magnetic core, a shaft seat and an air intake shaft; the shell is an inverted L-shaped rotating body structure, a shaft hole matching the air intake shaft is provided at the center of the upper end, a cavity is formed below the shaft hole, the second cover plate is tightly attached to the top wall of the cavity, a center hole having an outer diameter larger than the shaft hole is provided at the center of the second cover plate, the shaft seat is located at the lower end of the cavity, a shaft hole matching the air intake shaft is also provided at the center of the shaft seat, the second cover plate and the shaft seat are both sealed and connected to the shell, and the air intake shaft is sealed and fixedly mounted on the shaft seat and the shaft of the shell. The bottom surface of the second cover plate and the shaft seat is flush with the bottom surface of the shaft seat, a cylindrical chamber centered on the air inlet shaft is formed between the second cover plate and the shaft seat, the magnetic core is a rotating body structure, the air inlet shaft is sleeved in the chamber by the magnetic core, and a gap is provided between the magnetic core and the outer wall of the air inlet shaft and the inner wall of the chamber, the air inlet shaft is provided with a downward blind hole along the axial direction, the lower end of the blind hole is provided with a plurality of radial through holes at the shaft seat, the shaft seat is provided with an air inlet channel connected with the chamber at the corresponding through holes, and an air outlet channel is provided from the chamber through the second cover plate and the shell to the outside of the shell. The air outlet channel is preferably a nonlinear air outlet channel.

[0006] Furthermore, an annular groove is provided on the outer wall of the shaft seat, and the annular groove is located at the same height as the through hole of the intake shaft, and an intake hole connected to the through hole is provided at the through hole of the intake shaft corresponding to the annular groove.

[0007] Furthermore, a spiral groove is provided on the outer wall of the shaft seat above the annular groove, the spiral groove is communicated with the annular groove and the chamber, and the spiral groove, the annular groove and the air inlet hole form an air inlet channel.

[0008] Furthermore, an annular groove centered on the air inlet axis is provided on the upper surface of the shell, and a plurality of air outlet holes are arrayed at the bottom of the annular groove. The air outlet holes are located above the second cover plate, and the minimum distance between the side walls and the center of the air inlet axis is greater than the radius of the center hole of the second cover plate. The center hole of the second cover plate is connected to the air outlet hole and forms a nonlinear air outlet channel for exhausting air from the chamber to the outside of the shell.

[0009] Furthermore, it also includes a first cover plate, which is an inverted L-shaped rotating body structure. The first cover plate is buckled in the annular groove, and its outer diameter and height match the outer diameter and height of the annular groove. The inner diameter of the first cover plate is larger than the inner diameter of the annular groove.

[0010] Furthermore, the second cover plate is a plate-like annular structure, the diameter of the center hole of which is larger than the outer diameter of the air inlet shaft at that location and smaller than the outer diameter of the magnetic core. The upper surface of the second cover plate covers all the air outlet holes, and an exhaust groove communicating with the center hole is provided on the upper surface of the air outlet holes.

[0011] Furthermore, the second cover plate is a plate-shaped annular structure, the diameter of the center hole of which is larger than the outer diameter of the air inlet shaft at that location and smaller than the outer diameter of the magnetic core, the upper and lower surfaces of the second cover plate are both annular step grooves at the edges of the center hole, the step groove on the upper surface of the second cover plate is directly connected to the air outlet, and the outer diameter of the step groove on the lower surface of the second cover plate is larger than the outer diameter of the magnetic core.

[0012] Furthermore, a locking hole is provided on the outer wall of the shell at the outer side wall of the second cover plate, and the second cover plate is locked and fixed to the shell by bolts in the locking hole.

[0013] Furthermore, it also includes a fixing frame, which is sleeved on the upper end of the shell and has an opening at one end. The fixing frame is clamped and fixed to the shell by bolts arranged on the side and passing through the opening.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: an external air source is connected to the upper end of the air inlet shaft, and the gas passes through a blind hole to the through hole of the air inlet shaft to the air inlet channel into the chamber, and is discharged through a nonlinear air outlet channel, so that the vibrator of the present invention uses compressed air as a power source, is light in weight, small in size, safe and energy-saving; its vibration frequency and vibration intensity can be precisely controlled by adjusting the flow rate and air pressure of the compressed air; a swirling airflow is formed in the chamber by the gas, so that the magnetic core rotates at a high speed in the chamber and is in a suspended state, thereby reducing the wear of the magnetic core, and the heat generated during work can be quickly dissipated through the swirling airflow in the chamber and the gas is discharged, and the cooling is fast, which is beneficial to extending the service life of the vibrator of the present invention.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the vibrator of the present invention without a fixing frame.

[0017] Figure 2 It is a front view of the vibrator of the present invention.

[0018] Figure 3 It is a top view of the vibrator of the present invention.

[0019] Figure 4 This is the front view of the vibrator shaft seat of the present invention.

[0020] Figure 5 It is a top view of the vibrator housing of the present invention.

[0021] Figure 6 The figure is a top view of a second cover plate embodiment of the vibrator of the present invention.

[0022] Figure 7 It is a top view of another embodiment of the second cover plate of the vibrator of the present invention.

[0023] 1. Shell, 11. Chamber, 12. Annular groove, 13. Air outlet,

[0024] 14. Lock hole, 2. Shaft seat, 21. Annular groove, 22. Air inlet,

[0025] 23. spiral groove, 3. magnetic core, 4. second cover plate, 41. step groove,

[0026] 42. Exhaust slot, 5. First cover plate, 6. Inlet shaft, 61. Blind hole,

[0027] 62. Through hole, 7. Fixed bracket. DETAILED DESCRIPTION

[0028] like Figure 1-3As shown in Figure 5, a pneumatic vibrator includes a shell 1, a first cover plate 5, a second cover plate 4, a magnetic core 3, an axle seat 2, an air inlet shaft 6 and a fixing frame 7. The shell 1 is an inverted L-shaped rotating body structure, and a shaft hole matching the air inlet shaft 6 is provided at the center of the upper end, and a cavity is provided at the lower part. The fixing frame 7 is sleeved on the upper end of the shell 1, and an opening is provided at one end. The fixing frame 7 is clamped and fixed to the shell 1 by bolts provided on the side and passing through the opening. An annular groove 12 centered on the air inlet shaft 6 is provided on the upper surface of the shell 1, and a plurality of air outlet holes 13 are arranged in an array at the bottom of the annular groove 12. The first cover plate 5 is also an inverted L-shaped rotating body structure. The first cover plate 5 is buckled in the annular groove 12, and its outer diameter and height match the outer diameter and height of the annular groove 12. The inner diameter of the first cover plate 5 (the diameter of the central through hole of the first cover plate) is larger than the inner diameter of the annular groove 12. The second cover plate 4 is close to the top wall of the cavity. The center of the second cover plate 4 is provided with a center hole whose outer diameter is larger than the shaft hole. The shaft seat 2 is located at the lower end of the cavity. The center of the shaft seat 2 is also provided with a shaft hole matching the air intake shaft 6. The second cover plate 4 and the shaft seat 2 are both sealed and connected to the housing 1. The outer wall of the housing 1 is provided with a lock hole 14 at the outer wall of the second cover plate 4. The second cover plate 4 is locked and fixed with the housing 1 by bolts in the lock hole 14. The air intake shaft 6 is sealed and fixedly installed in the shaft seat 2 and the shaft hole of the housing 1. Its bottom surface is flush with the bottom surface of the shaft seat 2. A cylindrical chamber 11 with the air intake shaft 6 as the center is formed between the second cover plate 4 and the shaft seat 2. The magnetic core 3 is a rotating body structure. Its outer wall is preferably arc-shaped. The magnetic core 3 is sleeved with the air intake shaft 6 in the chamber 11, and a gap is provided between the magnetic core 3 and the outer wall of the air intake shaft 6 and the inner wall of the chamber 11. The air inlet shaft 6 is axially provided with a downward blind hole 61, and the lower end of the blind hole 61 is provided with four radial through holes 62 in an array at the shaft seat 2. The shaft seat 2 is provided with an air inlet channel connected to the chamber 11 at the corresponding through hole 62, and the second cover plate 4 and the shell 1 are provided with a nonlinear air outlet channel connected to the chamber 11 from the outside of the shell 1.

[0029] As a preference, Figure 1 and Figure 4 As shown, the outer wall of the shaft seat 2 is provided with an annular groove 21, and the annular groove 21 is located at the same height as the through hole 62 of the intake shaft 6. The annular groove 21 is provided with four intake holes 22 connected with the through holes 62 at the four through holes 62 of the intake shaft 6. The shaft seat 2 is provided with a spiral groove 23 on the outer wall above the annular groove 21, and the spiral groove 23 is connected with the annular groove 21 and the chamber 11. The spiral groove 23, the annular groove 21 and the intake holes 22 form an intake channel.

[0030] Preferably, the air outlet 13 is located above the second cover plate 4, and the minimum distance between its side wall and the center of the air inlet shaft 6 is greater than the radius of the center hole of the second cover plate 4. The second cover plate 4 is a plate-shaped annular structure, and the diameter of its center hole is greater than the outer diameter of the air inlet shaft 6 at that location and smaller than the outer diameter of the magnetic core 3. Figure 1 and Figure 7As shown, the upper surface of the second cover plate 4 covers all the air outlet holes 13, and an exhaust groove 42 communicating with the central hole is provided on the upper surface of the second cover plate 4 at the air outlet holes 13. Figure 1 and Figure 6 As shown, the second cover plate 4 has an annular step groove 41 on both the upper and lower surfaces at the edge of its central hole, and the step groove 41 on the upper surface of the second cover plate 4 is directly connected to the air outlet 13. The outer diameter of the step groove 41 on the lower surface of the second cover plate 4 is larger than the outer diameter of the magnetic core 3.

[0031] The present invention connects an external air source through the upper end of the air inlet shaft, and the gas passes through a blind hole to the through hole of the air inlet shaft to the air inlet channel to enter the chamber, and is discharged through a nonlinear air outlet channel. Therefore, the vibrator of the present invention uses compressed air as a power source, is light in weight, small in size, safe and energy-saving; its vibration frequency and vibration intensity can be accurately controlled by adjusting the flow rate and air pressure of the compressed air; the gas forms a swirling airflow in the chamber, so that the magnetic core rotates at a high speed in the chamber and is in a suspended state, thereby reducing the wear of the magnetic core; the swirling airflow in the chamber is used to offset and discharge the gas, so that the heat generated during work can be quickly dissipated, and the cooling is fast, which is beneficial to extending the service life of the vibrator of the present invention.

[0032] The present invention is not limited to the above-mentioned specific implementation modes. For ordinary technicians in this field, various changes made based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. A pneumatic vibrator, characterized in that: The invention comprises a shell, a second cover plate, a magnetic core, an axle seat and an air inlet shaft; the shell is an inverted L-shaped rotating body structure, a shaft hole matching the air inlet shaft is provided at the center of the upper end, a cavity is formed below the shaft hole, the second cover plate is close to the top wall of the cavity, a center hole with an outer diameter larger than the shaft hole is provided at the center of the second cover plate, the axle seat is located at the lower end of the cavity, a shaft hole matching the air inlet shaft is also provided at the center of the shaft seat, the second cover plate and the shaft seat are both sealed and connected to the shell, the air inlet shaft is sealed and fixedly installed in the axle seat and the axle hole of the shell, and its bottom surface is flush with the bottom surface of the axle seat, a cylindrical chamber centered on the air inlet shaft is formed between the second cover plate and the shaft seat, the magnetic core is a rotating body structure, the air inlet shaft is sleeved in the chamber by the magnetic core, and a gap is provided between the magnetic core and the outer wall of the air inlet shaft and the inner wall of the chamber, the air inlet shaft is along the axis A downward blind hole is provided, and a plurality of radial through holes are provided at the shaft seat at the lower end of the blind hole. The shaft seat is provided with an air inlet channel connected to the chamber at the corresponding through hole, and an air outlet channel is provided from the chamber through the second cover plate and the shell to the outside of the shell; an annular groove is provided on the outer wall of the shaft seat, and the annular groove is located at the same height as the through hole of the air inlet shaft, and an air inlet hole connected to the through hole is provided at the through hole of the air inlet shaft corresponding to the annular groove; an annular groove centered on the air inlet shaft is provided on the upper surface of the shell, and a plurality of air outlet holes are arrayed at the bottom of the annular groove, and the air outlet holes are located above the second cover plate, and the minimum distance between the side wall and the center of the air inlet shaft is greater than the radius of the center hole of the second cover plate, and the center hole of the second cover plate is connected to the air outlet hole to form a nonlinear air outlet channel for exhausting air from the chamber to the outside of the shell.

2. A pneumatic vibrator according to claim 1, characterized in that: The shaft seat is provided with a spiral groove on the outer wall above the annular groove, and the spiral groove is communicated with the annular groove and the chamber.

3. A pneumatic vibrator according to claim 1, characterized in that: It also includes a first cover plate, which is an inverted L-shaped rotating body structure. The first cover plate is buckled in the annular groove, and its outer diameter and height match the outer diameter and height of the annular groove. The inner diameter of the first cover plate is larger than the inner diameter of the annular groove.

4. A pneumatic vibrator according to claim 1, characterized in that: The second cover plate is a plate-shaped annular structure, the diameter of the center hole of which is larger than the outer diameter of the air inlet shaft at that location and smaller than the outer diameter of the magnetic core. The upper surface of the second cover plate covers all the air outlet holes, and an exhaust groove communicating with the center hole is provided on the upper surface of the air outlet holes.

5. A pneumatic vibrator according to claim 1, characterized in that: The second cover plate is a plate-shaped annular structure, the diameter of its center hole is larger than the outer diameter of the air inlet shaft at that location and smaller than the outer diameter of the magnetic core, the upper and lower surfaces of the second cover plate are both annular step grooves at the edges of its center hole, and the step groove on the upper surface of the second cover plate is directly connected to the air outlet.

6. A pneumatic vibrator according to claim 5, characterized in that: The outer diameter of the step groove on the lower surface of the second cover plate is larger than the outer diameter of the magnetic core.

7. A pneumatic vibrator according to claim 1, characterized in that: The outer wall of the shell is provided with a locking hole at the outer wall of the second cover plate, and the second cover plate is locked and fixed to the shell by bolts in the locking hole.

8. A pneumatic vibrator according to claim 1, characterized in that: It also includes a fixing frame, which is sleeved on the upper end of the shell and has an opening at one end. The fixing frame is clamped and fixed to the shell by bolts arranged on the side and passing through the opening.

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