Variable-speed coaxial excitation source

Abstract

The utility model relates to a variable-speed coaxial excitation source. The variable-speed coaxial excitation source comprises a support, an upper outer bearing chamber is mounted in the support, a left-handed bearing is mounted in the upper outer bearing chamber, an upper inner bearing chamber is mounted on an inner ring of the left-handed bearing, a right-handed bearing is mounted in the upper inner bearing chamber, and a rotating shaft is mounted on an inner ring of the right-handed bearing; the upper end of the rotating shaft penetrates through the upper inner bearing chamber and then is fixedly sleeved with a belt wheel, and the upper end of the rotating shaft is further fixedly sleeved with a left-handed balance weight. A gear box is installed at an opening in the lower end of the upper outer bearing chamber, a gear set is installed in the gear box, and the rotating direction of the rotating shaft can be opposite to the rotating direction of the upper inner bearing chamber through the gear set; a lower gland is installed at the lower end of the gearbox, an upper gland is installed between the upper end of the upper outer bearing chamber and the side wall of the upper inner bearing chamber, and the upper end of the upper inner bearing chamber penetrates through the upper gland and then is fixedly sleeved with a right-handed rotation balance weight. The utility model has the beneficial effects of strong bearing capacity, high stability, good lubricating effect, strong maintainability and the like.

Description

Technical Field

[0001] This application relates to the field of vibrating screening equipment technology, and in particular to a variable speed coaxial excitation source. Background Technology

[0002] In the field of mechanical vibration, the excitation source is a key component for generating vibration force and is widely used in various vibrating equipment. Traditional excitation sources typically employ a single rotating shaft structure, generating centrifugal force through eccentric blocks or counterweights during rotation to achieve the excitation effect. However, this single rotating shaft structure has drawbacks such as a limited vibration frequency and a limited range of excitation force adjustment, making it difficult to meet the vibration requirements under complex working conditions.

[0003] To overcome the aforementioned shortcomings, coaxial vibration sources have emerged on the market, which achieve more complex vibration effects through multiple coaxially arranged rotating components. However, existing coaxial vibration sources still have deficiencies in terms of structural design and excitation efficiency, such as severe wear due to unreasonable bearing arrangement, low gear transmission efficiency, and insufficient flexibility in adjusting the excitation force. Utility Model Content

[0004] This utility model addresses the aforementioned problems in the existing technology by providing a variable speed coaxial excitation source.

[0005] The objective of this utility model is mainly achieved through the following solution:

[0006] A variable-speed coaxial vibration source includes a support. An upper outer bearing chamber is installed inside the support. A left-handed bearing is installed inside the upper outer bearing chamber. An upper inner bearing chamber is installed inside the inner ring of the left-handed bearing. A right-handed bearing is installed inside the inner ring of the upper inner bearing chamber. A rotating shaft is installed inside the inner ring of the right-handed bearing. A pulley is fixedly fitted onto the upper end of the rotating shaft after passing through the upper inner bearing chamber, and a left-handed counterweight is also fixedly fitted onto the upper end of the rotating shaft. A gearbox is installed at the lower opening of the upper outer bearing chamber. A gear set is installed inside the gearbox, and the gear set enables the rotating shaft to rotate in the opposite direction to the upper inner bearing chamber. A lower pressure cover is installed at the lower end of the gearbox. An upper pressure cover is installed between the upper end of the upper outer bearing chamber and the side wall of the upper inner bearing chamber, and a right-handed counterweight is fixedly fitted onto the upper end of the upper inner bearing chamber after passing through the upper pressure cover.

[0007] Preferably, the left-hand bearing is provided with upper and lower sets, and the outer ring of the left-hand bearing is tightly connected to the inner wall of the upper outer bearing chamber, and the inner ring of the left-hand bearing is tightly connected to the outer wall of the upper inner bearing chamber.

[0008] Preferably, the right-hand bearing has two sets, upper and lower, with the outer ring of the right-hand bearing tightly connected to the inner wall of the upper inner bearing chamber, and the inner ring of the right-hand bearing tightly connected to the side wall of the rotating shaft; this double-layer bearing structure improves the bearing's load-bearing capacity and stability.

[0009] Preferably, the outer wall of the rotating shaft is provided with a blade assembly, which is located between two sets of right-hand bearings; the outer wall of the upper inner bearing chamber is also provided with a blade assembly, which is located between two sets of left-hand bearings; the blade assembly includes an outer blade and an inner blade in a helical structure, and the helical directions of the outer blade and the inner blade are opposite; this blade assembly design helps to improve the flow of lubricating oil and improve the lubrication effect.

[0010] Preferably, a vent cap is installed at the upper end of the rotating shaft to prevent dust and impurities from entering the bearing.

[0011] Preferably, the excitation source also includes an oil level gauge and assembly, which is connected to the gearbox and used to monitor the lubricating oil level in the gearbox in real time.

[0012] Preferably, the gear set includes a driving gear, a driven gear, a first transmission guide gear, and a second transmission guide gear. The driving gear is fixedly sleeved on the lower end of the rotating shaft. The first and second transmission guide gears are rotatably connected to the gearbox via a rotating shaft. The driven gear is coaxially arranged with the driving gear and is located above the driving gear. The upper end of the driven gear is fixedly connected to the lower end of the upper inner bearing chamber, and the driven gear is hollow inside. The rotating shaft passes through the interior of the driven gear. The driving gear meshes with the first transmission guide gear, the first transmission guide gear meshes with the second transmission guide gear, and the second transmission guide gear meshes with the driven gear. This gear set design enables the rotating shaft and the upper inner bearing chamber to rotate in opposite directions, thereby improving the excitation efficiency and flexibility of the excitation source.

[0013] In summary, compared with the prior art, the present invention has the following beneficial technical effects:

[0014] (1) This utility model improves the bearing capacity and stability and extends the service life by setting left-hand and right-hand bearings and adopting a double-layer bearing structure;

[0015] (2) This utility model achieves the opposite rotation of the rotating shaft and the upper inner bearing chamber through the gear set, making the excitation effect of the excitation source more complex and varied, and meeting the vibration requirements under complex working conditions.

[0016] (3) This utility model achieves the circulation lubrication and cooling of hydraulic oil through the set of blades, effectively reducing the working temperature, improving the lubrication effect, and reducing the wear of bearings;

[0017] (4) This utility model avoids oil leakage and air pressure imbalance by setting a breathable cap, oil level gauge and assembly, and enhances the sealing and maintainability of the excitation source. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Reference numerals in the attached diagram: 1-oil level gauge and assembly, 2-pulley, 3-vent cap, 4-left-hand counterweight, 5-right-hand counterweight, 6-upper pressure cover, 7-upper outer bearing chamber, 8-left-hand bearing, 9-blade assembly, 10-upper inner bearing chamber, 11-rotating shaft, 12-right-hand bearing, 13-drive gear, 14-first transmission guide gear, 15-lower pressure cover, 16-gearbox, 17-support, 18-second transmission guide gear, 19-driven gear. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0021] Example 1:

[0022] like Figure 1 As shown, this utility model discloses a technical solution: a variable-speed coaxial vibration source, including a support 17. The support 17 is detachably and fixedly installed on the vibration equipment by bolts. An upper outer bearing chamber 7 is fixedly installed inside the support 17 by bolts. Two sets of left-hand bearings 8 are installed inside the upper outer bearing chamber 7. An upper inner bearing chamber 10 is installed on the inner ring of the left-hand bearings 8. Two sets of right-hand bearings 12 are installed inside the upper inner bearing chamber 10. A rotating shaft 11 is installed on the inner ring of the right-hand bearings 12. The upper end of the rotating shaft 11 passes through the upper inner bearing chamber 10 and is fixedly fitted with a pulley 2 and a left-hand counterweight 4. A sealing ring is installed between the lower end of the pulley 2 and the upper end of the upper inner bearing chamber 10. A gearbox 16 is fixedly installed at the lower opening of the upper outer bearing chamber 7 by bolts. A gear set is installed inside the gearbox 16, and the gear set enables the rotating shaft 11 to rotate in the opposite direction to the upper inner bearing chamber 10.

[0023] The lower end of the gearbox 16 is also fixedly installed with a lower pressure cover 15 by bolts. An upper pressure cover 6 is installed between the upper end of the upper outer bearing chamber 7 and the side wall of the upper inner bearing chamber 10. The outer side of the upper pressure cover 6 is fixedly connected to the upper end of the upper outer bearing chamber 7 by bolts. A sealing ring is bonded to the inner side of the upper pressure cover 6. The inner side of the sealing ring contacts the side wall of the upper inner bearing chamber 10. After the upper end of the upper inner bearing chamber 10 passes through the upper pressure cover 6, a right-hand counterweight 5 is fixedly fitted.

[0024] The excitation source also includes an oil level gauge and assembly 1, which is connected to the inside of the gearbox 16 via a lower pressure cover 15, and is used to monitor the lubricating oil level in the gearbox 16 in real time.

[0025] The upper end of the rotating shaft 11 is also threaded with a vent cap 3, which on the one hand prevents dust and impurities from entering the bearing chamber, and on the other hand, allows excess gas to be discharged through the shaft through hole on the rotating shaft 11 and the vent cap 3, ensuring that the chamber is at normal atmospheric pressure.

[0026] Example 2:

[0027] like Figure 1 As shown, this utility model discloses another technical solution, a variable speed coaxial vibration source, which differs from embodiment 1 in that the outer ring of the left-hand bearing 8 is tightly connected to the inner wall of the upper outer bearing chamber 7, the inner ring of the left-hand bearing 8 is tightly connected to the outer wall of the upper inner bearing chamber 10, and the upper end face of the gearbox 16 and the lower end face of the upper pressure cover 6 are integrally provided with a protrusion that abuts against the outer side of the left-hand bearing 8; the right-hand bearing 12 is provided with upper and lower sets, and the outer ring of the right-hand bearing 12 is tightly connected to the inner wall of the upper inner bearing chamber 10, and the inner ring of the right-hand bearing 12 is tightly connected to the side wall of the rotating shaft 11.

[0028] Specifically, the outer wall of the rotating shaft 11 is provided with a blade assembly 9, which is located between two sets of right-handed bearings 12; the outer wall of the upper inner bearing chamber 10 is also provided with a blade assembly 9, which is located between two sets of left-handed bearings 8; the blade assembly 9 includes an outer blade and an inner blade in a helical structure, and the helical directions of the outer blade and the inner blade are opposite. The inner blade at the rotating shaft 11 is nested on the outside of the rotating shaft 11 and is coaxially arranged with the shaft body of the rotating shaft 11. The outer blade at the rotating shaft 11 is welded to the side wall of the inner blade by a fixing rod. The inner blade and the outer blade form a helical staggered arrangement in the axial direction; the blade assembly structure at the upper inner bearing chamber 10 is similar, and will not be described in detail here.

[0029] Example 3:

[0030] like Figure 1As shown, this utility model discloses another technical solution, a variable-speed coaxial vibration source, which differs from embodiment 1 in that the gear set includes a driving gear 13, a driven gear 19, a first transmission guide gear 14, and a second transmission guide gear 18. The driving gear 13 is fixedly sleeved on the lower end of the rotating shaft 11. The first transmission guide gear 14 and the second transmission guide gear 18 are both rotatably connected to the gearbox 16 via rotating shafts. The driven gear 19 is coaxially arranged with the driving gear 13, and the driven gear 19 is located above the driving gear 13. The upper end of the driven gear 19 is fixedly connected to the lower end of the upper inner bearing chamber 10, and the driven gear 19 is hollow inside. The rotating shaft 11 passes through the interior of the driven gear 19. The driving gear 13 is meshed with the first transmission guide gear 14, the first transmission guide gear 14 is meshed with the second transmission guide gear 18, and the second transmission guide gear 18 is meshed with the driven gear 19. When the rotating shaft 11 rotates, the upper inner bearing chamber 10 and the rotating shaft 11 rotate in opposite directions through the transmission action of the gear set, thereby achieving a complex excitation effect.

[0031] The variable-speed coaxial vibration source provided by this utility model, when working, starts the motor, and drives the pulley 2 and the rotating shaft 11 to rotate clockwise through the pulley and transmission belt on the motor. The driving gear 13 at the lower end of the rotating shaft 11 drives the first transmission guide gear 14 to rotate counterclockwise, and then drives the driven gear 19 to rotate clockwise through the second transmission guide gear 18. The driven gear 19 is fixedly connected to the upper inner bearing chamber 10, and drives the upper inner bearing chamber 10 to rotate clockwise, forming a counter-movement with the clockwise rotation of the rotating shaft 11. The left-hand counterweight 4 and the right-hand counterweight 5 rotate with the rotating shaft 11 and the upper inner bearing chamber 10 respectively, realizing the control of the screen machine trajectory. The spiral blades of the blade group 9 rotate in the opposite direction, squeezing the oil to circulate. The oil flows through the bearing and gear surfaces to carry away heat and reduce the oil temperature. The oil level gauge and assembly 1 monitor the oil level in real time, and the vent cap 3 discharges the gas in the cavity to maintain the air pressure balance.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A variable speed coaxial excitation source comprising a support (17), characterized in that: The inside of the support (17) is provided with an upper outer bearing chamber (7), the inside of the upper outer bearing chamber (7) is provided with a left-rotation bearing (8), the inner ring of the left-rotation bearing (8) is provided with an upper inner bearing chamber (10), the inside of the upper inner bearing chamber (10) is provided with a right-rotation bearing (12), the inner ring of the right-rotation bearing (12) is provided with a rotating shaft (11); the upper end of the rotating shaft (11) is fixedly sleeved with a belt pulley (2) after penetrating through the upper inner bearing chamber (10), and the upper end of the rotating shaft (11) is also fixedly sleeved with a left-rotation counterweight (4); the lower end opening of the upper outer bearing chamber (7) is provided with a gear box (16), the gear box (16) is provided with a gear set, and the rotating direction of the rotating shaft (11) is opposite to the rotating direction of the upper inner bearing chamber (10) through the gear set; the lower end of the gear box (16) is provided with a lower pressing cover (15), the upper end of the upper outer bearing chamber (7) and the sidewall of the upper inner bearing chamber (10) are provided with an upper pressing cover (6), and the upper end of the upper inner bearing chamber (10) is fixedly sleeved with a right-rotation counterweight (5) after penetrating through the upper pressing cover (6).

2. The variable coaxial excitation source of claim 1, wherein: The left-rotation bearing (8) is provided with two groups of upper and lower bearings, and the outer ring of the left-rotation bearing (8) is tightly connected with the inner sidewall of the upper outer bearing chamber (7), and the inner ring of the left-rotation bearing (8) is tightly connected with the outer sidewall of the upper inner bearing chamber (10).

3. The variable coaxial excitation source of claim 2, wherein: The right-rotation bearing (12) is provided with two groups of upper and lower bearings, and the outer ring of the right-rotation bearing (12) is tightly connected with the inner sidewall of the upper inner bearing chamber (10), and the inner ring of the right-rotation bearing (12) is tightly connected with the sidewall of the rotating shaft (11).

4. The variable coaxial excitation source of claim 3, wherein: The outer sidewall of the rotating shaft (11) is provided with a blade group (9), and the blade group (9) is located between the two groups of right-rotation bearings (12); the outer sidewall of the upper inner bearing chamber (10) is also provided with a blade group (9), and the blade group (9) is located between the two groups of left-rotation bearings (8); the blade group (9) comprises outer blades and inner blades in a spiral structure, and the spiral directions of the outer blades and the inner blades are opposite.

5. The variable coaxial excitation source of claim 1, wherein: The upper end of the rotating shaft (11) is provided with a breathable cap (3).

6. The variable coaxial excitation source of claim 1, wherein: The excitation source also comprises an oil level gauge and assembly (1) in communication with the gear box (16).

7. The variable coaxial excitation source of claim 1, wherein: The gear set comprises a driving gear (13), a driven gear (19), a first transmission guide gear (14) and a second transmission guide gear (18), the driving gear (13) is fixedly sleeved on the lower end of the rotating shaft (11), the first transmission guide gear (14) and the second transmission guide gear (18) are both rotationally connected in the gear box (16) through the rotating shaft, the driven gear (19) is coaxially arranged with the driving gear (13), and the driven gear (19) is located above the driving gear (13), the upper end of the driven gear (19) is fixedly connected with the lower end of the upper inner bearing chamber (10), and the driven gear (19) is internally hollow, the rotating shaft (11) passes through the inside of the driven gear (19), the driving gear (13) is in meshing connection with the first transmission guide gear (14), the first transmission guide gear (14) is in meshing connection with the second transmission guide gear (18), and the second transmission guide gear (18) is in meshing connection with the driven gear (19).

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