Vibration excitation device

Abstract

The invention discloses a vibration excitation device, which is characterized by comprising a vibration excitation box (1), the two ends of each transmission shaft (5) are installed on the two opposite side walls of the vibration excitation box (1) respectively, and the two transmission shafts (5) are arranged in parallel in a spaced mode; the two eccentric blocks (6) are installed on the two transmission shafts (5) respectively and located in the vibration excitation box (1), and the gravity centers of the eccentric blocks (6) deviate from the axes of the corresponding transmission shafts (5); the two gears (8) are respectively arranged on the two transmission shafts (5) and are positioned in the vibration excitation box (1), and the two gears (8) are meshed with each other; and the driving component (2) is connected with one transmission shaft (5) through a crowned tooth coupling (10).

Description

Technical Field

[0001] The present invention relates to the field of engineering technology, and more particularly, to a vibration excitation device. Background Art

[0002] Eccentric vibration excitation devices are mainly applied to high-frequency heavy-load vibration working conditions. The principle is that a hydraulic or electric drive device drives a synchronous gear with an eccentric block to rotate at a high speed, and high-frequency vibration is achieved through the heavy-load impact force generated by the eccentric block. It can be applied to application scenarios such as material screening, soil compaction, and efficient foundation pile driving construction. Since its vibration frequency is generally nearly 3000 r / min and the eccentric vibration excitation force ranges from several tons to hundreds of tons, phenomena such as large transmission noise, easy fracture of the transmission shaft, and insufficient bearing lubrication and heat dissipation leading to high temperature are likely to occur during continuous high-speed heavy-load construction, resulting in a high failure rate of the eccentric vibration excitation device, low construction efficiency, and high customer usage costs. Summary of the Invention

[0003] The present invention aims to provide a vibration excitation device to improve the problem of easy fracture of the transmission shaft in related technologies.

[0004] According to one aspect of an embodiment of the present invention, there is provided a vibration excitation device, which includes:

[0005] A vibration excitation box;

[0006] Two transmission shafts, each end of each transmission shaft is installed on two opposite side walls of the vibration excitation box, and the two transmission shafts are parallel and spaced apart;

[0007] Two eccentric blocks, which are respectively installed on the two transmission shafts and are located in the vibration excitation box, and the center of gravity of the eccentric block deviates from the axis of the corresponding transmission shaft;

[0008] Two gears, which are respectively installed on the two transmission shafts and are located in the vibration excitation box, and the two gears are meshed; and

[0009] A driving component, which is connected to one transmission shaft through a drum-shaped tooth coupling.

[0010] In some embodiments, the drum-shaped tooth coupling includes an annular base body that is in transmission connection with the driving component. The outer peripheral surface of the annular base body is provided with first external teeth, and the contour line of the first external teeth is an arc-shaped line that protrudes in a direction away from the axis of the drum-shaped tooth coupling in the longitudinal section of the drum-shaped tooth coupling. The end of the transmission shaft is provided with first internal teeth that are adapted to the first external teeth, and the first internal teeth and the first external teeth are meshed.

[0011] In some embodiments, the inner peripheral surface of the annular base body is provided with second internal teeth, and the driving shaft of the driving component is provided with second external teeth that are adapted to the second internal teeth, and the second external teeth and the second internal teeth are meshed.

[0012] In some embodiments, the excitation device further includes a lubricating oil sump located in the excitation box. The lubricating oil sump is disposed below the gear and / or the eccentric block and is configured such that the lower ends of the gear and / or the eccentric block are immersed in the lubricating oil in the lubricating oil sump, so that the lubricating oil in the lubricating oil sump splashes as the gear and / or the eccentric block rotates.

[0013] In some embodiments, the lubricating oil sump extends along the diameter direction of the gear, and the height of the bottom of the lubricating oil sump gradually increases along the end portion close to the diameter direction of the gear.

[0014] In some embodiments, the lower ends of both gears are located in the lubricating oil sump.

[0015] In some embodiments, an oil inlet hole is provided at the bottom of the lubricating oil sump.

[0016] In some embodiments, the excitation device further includes a bearing sleeved on the transmission shaft and a bearing seat mounted on the side wall of the excitation box. The bearing seat has an inner cavity for mounting the bearing. An oil collecting groove is provided on the part of the bearing seat located inside the excitation box, and a lubricating oil hole communicating the oil collecting groove and the inner cavity of the bearing seat for accommodating the bearing is further provided on the bearing seat.

[0017] In some embodiments, the oil collecting groove is provided at the upper end of the bearing seat, and the opening of the oil collecting groove faces upward.

[0018] In some embodiments, the cross-section of the oil collecting groove gradually increases along the direction close to the open end of the oil collecting groove.

[0019] In some embodiments, heat dissipation ribs are provided on the outer wall of the excitation box.

[0020] In some embodiments, the gear is a helical gear.

[0021] According to another aspect of the present invention, a construction machine is further provided. The construction machine includes the above-mentioned excitation device.

[0022] Applying the technical solution of the present invention, the driving component is connected to a transmission shaft through a drum-shaped tooth coupling. The drum-shaped tooth coupling can effectively compensate for the problem that the driving shaft is bent and broken due to the flexible deformation of the transmission shaft.

[0023] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 The structural schematic diagram of the excitation device according to the embodiment of the present invention is shown.

[0026] Figure 2 The side view structural schematic diagram of the excitation device according to the embodiment of the present invention is shown.

[0027] Figure 3 The sectional structural schematic diagram at A-A of the excitation device according to the embodiment of the present invention is shown.

[0028] Figure 4 Shows Figure 3 The partial enlarged view at C in

[0029] Figure 5 The sectional structural schematic diagram at B-B of the excitation device according to the embodiment of the present invention is shown.

[0030] Figure 6 The structural schematic diagram of the drum-shaped tooth coupling of the excitation device according to the embodiment of the present invention is shown.

[0031] Figure 7 The structural schematic diagram of the lubricating oil groove of the excitation device according to the embodiment of the present invention is shown.

[0032] Figure 8 The structural schematic diagram of the bearing housing of the excitation device according to the embodiment of the present invention is shown.

[0033] In the figure:

[0034] 1. Excitation box; 11. Heat dissipation ribs; 2. Driving component; 21. Driving shaft; 3. Bearing; 4. Bearing housing; 41. Oil collecting tank; 42. Lubricating oil hole; 5. Transmission shaft; 6. Eccentric block; 7. Lubricating oil groove; 71. Oil inlet hole; 8. Gear; 9. Transmission pin; 10. Drum-shaped tooth coupling; 101. First external tooth; 102. Second internal tooth. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] In the description of this application, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0039] The directional terms appearing in the following description are all the directions shown in the drawings and do not limit the specific structure of this application. In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] Unless otherwise specified, the terms "comprising" and "including" mentioned in this application are open-ended and can also be closed-ended. For example, the terms "comprising" and "including" can mean that other components not listed may also be included or contained, or that only the listed components are included or contained.

[0041] Unless otherwise specified, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0042] Combined Figures 1 to 5 As shown, the excitation device of this embodiment includes an excitation box 1, two transmission shafts 5, two eccentric blocks 6, two gears 8, and a driving component 2.

[0043] Both ends of each transmission shaft 5 are respectively installed on two opposite side walls of the excitation box 1, and the two transmission shafts 5 are parallel and arranged at intervals. The two eccentric blocks 6 are respectively installed on the two transmission shafts 5 and are located in the excitation box 1, and the center of gravity of the eccentric block 6 deviates from the axis of the corresponding transmission shaft 5.

[0044] The two gears 8 are respectively installed on the two transmission shafts 5 and are located in the excitation box 1, and the two gears 8 are meshed. The driving component 2 is connected to one transmission shaft 5, and this transmission shaft 5 is in transmission connection with the other transmission shaft 5 through the two meshed gears 8.

[0045] In some related technologies, the driving shaft 21 of the driving component 2 and the transmission shaft 5 are rigidly connected, and during the high-frequency eccentric excitation process, the transmission shaft 5 and / or the driving shaft 21 are prone to flexural deformation, which may cause the driving shaft of the driving component to break.

[0046] To improve the above problems, the driving component 2 of this embodiment is connected to one transmission shaft 5 through a drum-shaped tooth coupling 10, and the drum-shaped tooth coupling 10 can effectively compensate for the problem that the driving shaft bends and breaks due to the flexural deformation of the transmission shaft.

[0047] Referring to Figure 6 , the drum-shaped tooth coupling 10 includes an annular base body that is in transmission connection with the driving component 2. The outer circumferential surface of the annular base body is provided with first external teeth 101. The contour line of the first external teeth 101 is an arc-shaped line that protrudes away from the axis of the drum-shaped tooth coupling 10 in the longitudinal section of the drum-shaped tooth coupling 10. The end of the transmission shaft 5 is provided with first internal teeth that are adapted to the first external teeth 101, and the first internal teeth and the first external teeth 101 are meshed. The above-mentioned longitudinal section passes through the axis of the drum-shaped tooth coupling 10 and the tooth tips of the first external teeth 101.

[0048] In some embodiments, second internal teeth 102 are provided on the inner circumferential surface of the annular base body, and second external teeth adapted to the second internal teeth 102 are provided on the drive shaft 21 of the drive member 2, and the second external teeth and the second internal teeth 102 are engaged with each other.

[0049] The drive member 2 is connected in cooperation with the second internal teeth 102 of the drum-shaped tooth coupling 10 through the second external teeth of the drive shaft 21. The drum-shaped tooth coupling 10 is connected in torque transmission with the first internal teeth of the transmission shaft 5 through the first external teeth 101 of the drum shape, thereby driving the transmission shaft 5 to rotate at a high speed. The first external teeth 101 of the drum-shaped tooth coupling 10 are of an arc structure and can achieve a certain degree of angular rotation with the transmission shaft 5, effectively compensating for the deflection deformation generated by the transmission shaft 5 during high-speed rotation and avoiding the generation of radial forces on the drive shaft 21 and / or the transmission shaft 5 and resulting in fracture.

[0050] The drive member 2 drives the drum-shaped tooth coupling 10 through the drive shaft 21 to drive the transmission shaft 5 to rotate at a high speed. Specifically, the drive shaft 21 is connected to the drum-shaped tooth coupling 10 through an external spline, and the drum-shaped teeth are connected to the first internal teeth of the transmission shaft 5 through the first external teeth 101 of the drum shape. The first external teeth 101 of the drum shape are of an arc structure and can achieve a certain degree of angular rotation with the transmission shaft 5, effectively compensating for the deflection deformation generated by the transmission shaft 5 during high-speed rotation and avoiding the generation of radial forces on the drive shaft 21 and / or the transmission shaft 5 and resulting in fracture.

[0051] The eccentric block 6 and the gear 8 installed on the same transmission shaft 5 are connected through a transmission pin 9 so that the eccentric block 6 and the corresponding gear 8 rotate synchronously. The rotating assembly (eccentric block 6 and gear 8) is firmly connected to the transmission shaft 5, and can be welded or of an integral structure, and is driven by the drive member 2 to achieve eccentric excitation.

[0052] The two transmission shafts 5 are symmetrically arranged, and the symmetry center of the two transmission shafts 5 is located in the middle of the two transmission shafts 5. The two eccentric blocks 6 are respectively arranged on the two transmission shafts 5, and the two eccentric blocks 6 are also symmetrically arranged relative to the symmetry center of the two transmission shafts 5. The two gears 8 respectively installed on the two transmission shafts 5 are also symmetrically arranged relative to the above symmetry center. The two gears 8 form synchronous gears. The parameters such as the number of teeth and the module of the two gears are designed to be exactly the same. When the two gears 8 rotate, they can rotate in opposite directions at the same angular velocity, thereby realizing the synchronous movement of the two eccentric blocks 6.

[0053] In some related embodiments, the gear 8 is a spur gear, that is, the meshing teeth of the gear 8 extend along the axial direction of the gear 8. During high-speed rotation, due to the continuous change of the direction of the eccentric excitation force, the center distance of the gear meshing changes periodically, which results in large impact, large transmission noise, large energy loss, large heat generation and low transmission efficiency in the spur gear meshing transmission.

[0054] To improve the above problems, in some embodiments, the gear 8 is a helical gear. The synchronous transmission gear adopts helical tooth transmission, which has a large load-bearing capacity and smooth meshing, and can effectively solve the problems such as large meshing impact, high transmission noise, and low transmission efficiency caused by the change of the transmission center distance during the straight tooth transmission process.

[0055] See Figure 5 and 7 , the excitation device further includes a lubricating oil tank 7 located in the excitation box 1. The lubricating oil tank 7 is arranged below the gear 8 and / or the eccentric block 6 and is configured such that the lower ends of the gear 8 and / or the eccentric block 6 are immersed in the lubricating oil in the lubricating oil tank 7, so that the lubricating oil in the lubricating oil tank 7 splashes as the gear 8 and / or the eccentric block 6 rotates. The synchronous gear 8 and the eccentric block 6 drive the lubricating oil at the bottom of the lubricating oil tank 7 to splash to achieve lubrication.

[0056] In some embodiments, the lower ends of the two gears 8 are both located in the lubricating oil tank 7, and the rotation directions of the two gears 8 are opposite, so as to throw the lubricating oil in the lubricating oil tank 7 towards the two opposite side walls of the excitation box 1, which is beneficial to increasing the range that the lubricating oil can reach, and further lubricating multiple components in the excitation box 1 to ensure the normal operation of the excitation device and improve the service life of the excitation device.

[0057] The lubricating oil tank 7 extends along the diameter direction of the gear 8, and the height of the bottom of the lubricating oil tank 7 gradually increases along the end near the diameter direction of the gear 8 to form a boat-shaped lubricating oil tank 7.

[0058] In some embodiments, the lubricating oil tank 7 is higher than the bottom surface of the excitation box 1, and an oil inlet hole 71 leading to the bottom of the excitation box 1 is provided at the bottom of the lubricating oil tank 7. The lubricating oil tank 7 is arranged inside the excitation box 1, and the lubricating oil tank 7 is located below the transmission shaft 5, the eccentric block 6 and the gear 8. At least one oil inlet hole 71 is provided below the lubricating oil tank 7. The oil between the excitation box 1 and the lubricating oil tank 7 can enter the interior of the lubricating oil tank 7 through the oil inlet hole 71 to continuously replenish oil to meet the requirements of the eccentric block 6 and the gear 8 for rotational splash lubrication, and at the same time, the oil level inside the lubricating oil tank 7 is lower than the external oil level, which not only meets the high oil quantity heat dissipation requirements but also greatly reduces the oil stirring loss. The size and quantity of the oil inlet hole 71 can be set according to actual application requirements.

[0059] See Figure 5, initially, the oil level inside the lubricating oil tank 7 is the same as that outside the external excitation box 1 and is located at height b. When the driving component 2 drives the rotating assembly (the transmission shaft 5, the gear 8, the transmission pin 9, and the eccentric block 6) to rotate at high speed through the drum-shaped tooth coupling 10, the gear 8 and the eccentric block 6 will drive the lubricating oil inside the lubricating oil tank 7 to achieve splash lubrication, fling the oil to the inner wall of the excitation box 1 for heat dissipation and then flow back to the bottom of the excitation box 1. The oil level inside the lubricating oil tank 7 decreases. At the same time, the oil outside the lubricating oil tank 7 will enter the inside through the oil inlet hole 71 for oil replenishment. By controlling the number and diameter of the oil inlet holes 71, the internal oil level is controlled at position a. The design of the lubricating oil tank 7 not only increases the internal lubricating oil volume but also can greatly reduce the oil stirring loss.

[0060] See Figure 4 and Figure 8 , the excitation device further includes a bearing 3 sleeved on the transmission shaft 5 and a bearing seat 4 installed on the side wall of the excitation box 1. The bearing seat 4 has an inner cavity for installing the bearing 3. A oil collecting groove 41 is provided on the part of the bearing seat 4 located inside the excitation box 1. A lubricating oil hole 42 communicating the oil collecting groove 41 and the inner cavity of the bearing seat 4 for accommodating the bearing 3 is also provided on the bearing seat 4.

[0061] The bearing seat 4 is fixedly connected to the excitation box 1. The bearing seat 4 is used to install the bearing 3 to realize the relative rotation between the transmission shaft 5, the gear 8 and the excitation box 1. A V-shaped bearing oil collecting groove 41 is provided on the bearing seat 4. The splash lubricating oil inside the excitation box 1 flows into the bearing 3 through the V-shaped oil collecting groove 41, which can effectively increase its lubricating oil volume and improve its heat dissipation capacity. In some embodiments, the bearing 3 is a spherical roller bearing.

[0062] In some embodiments, the oil collecting groove 41 is provided at the upper end of the bearing seat 4, and the opening of the oil collecting groove 41 faces upward. The gear 8 and the eccentric block 6 drive the lubricating oil inside the lubricating oil tank 7 to achieve splash lubrication, fling the oil to the inner wall of the excitation box 1. While dissipating heat, it flows back downward by its own weight. The V-shaped bearing oil collecting groove 41 is provided on the bearing seat 4. The lubricating oil flowing back after heat dissipation enters the bearing 3 through the V-shaped bearing oil collecting groove 41, which can effectively increase its lubricating oil volume and improve its heat dissipation capacity. The V-shaped design can effectively increase the lubricating oil volume.

[0063] In some embodiments, the cross-section of the oil collecting groove 41 gradually increases along the direction close to the open end of the oil collecting groove 41, and the area of the open end of the oil collecting groove 41 is larger, which is beneficial to collecting the lubricating oil flung up by the gear 8 and the eccentric block 6.

[0064] In some embodiments, heat dissipation ribs 11 are provided on the outer wall of the excitation box 1. Multiple groups of heat dissipation ribs 11 are provided outside the lubricating oil cavity of the excitation box 1 to increase the heat dissipation area in contact with the outside air and improve the natural heat dissipation efficiency of the lubricating oil in the lubricating oil cavity.

[0065] The beneficial effects of this embodiment are as follows:

[0066] (1) Aiming at the problem that the drive shaft of the drive component is prone to fracture in the prior art, the present invention provides a drum gear transmission mechanism, that is, a drum gear is arranged between the drive shaft and the transmission shaft. The external spline 102 of the drum gear is an arc structure and can rotate at a certain angle with the transmission shaft 5, which can effectively compensate for the problem that the drive shaft bends and fractures due to the flexible deformation of the transmission shaft.

[0067] (2) The synchronous transmission gear 8 adopts helical gear transmission, which has a large load-bearing capacity and smooth meshing, and can effectively solve the problems such as large meshing impact, high transmission noise and low transmission efficiency caused by the change of the transmission center distance during the straight gear transmission process.

[0068] (3) An independent lubricating oil tank 7 is arranged inside the eccentric excitation device. By setting the lubricating oil tank 7, the oil level inside the lubricating oil tank 7 can be lower than the external oil level during the working process, which can not only increase the overall lubricating oil volume, but also reduce the rotating oil stirring loss. An oil inlet hole 71 is arranged at the bottom of the lubricating oil tank. The lubricating oil outside the lubricating oil tank enters the lubricating oil tank 7 through the oil inlet hole 71. The synchronous gear 8 and the eccentric block 6 drive the lubricating oil at the bottom of the lubricating oil tank to splash to achieve lubrication; an oil collecting tank 41 is arranged on the bearing seat, and the oil collecting tank 41 is connected to the bearing race of the bearing 3 inside the drum, which can effectively increase the amount of lubricating oil for lubricating the bearing 3 and reduce the heat generation of the bearing 3; a plurality of heat dissipation ribs 11 are arranged outside the excitation box 1, which can effectively increase the heat dissipation area and enhance the heat dissipation capacity of the lubricating oil.

[0069] According to another aspect of the present invention, a construction machine is also provided, and the construction machine includes the above-mentioned excitation device.

[0070] The above are only exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exciting device, characterized in that, Comprising: Vibrating box (1); Two transmission shafts (5), both ends of each of the transmission shafts (5) are respectively installed on two opposite side walls of the vibrating box (1), and the two transmission shafts (5) are parallel and arranged at intervals; Two eccentric blocks (6), respectively installed on the two transmission shafts (5) and located in the vibrating box (1), and the center of gravity of the eccentric block (6) deviates from the axis of the corresponding transmission shaft (5); Two gears (8), respectively installed on the two transmission shafts (5) and located in the vibrating box (1), and the two gears (8) are meshed; And A driving component (2), which is connected to one of the transmission shafts (5) through a drum-shaped tooth coupling (10).

2. The excitation device according to claim 1, characterized in that, The drum-shaped tooth coupling (10) includes an annular base body that is in transmission connection with the driving component (2), and a first external tooth (101) is provided on the outer peripheral surface of the annular base body. The contour line of the first external tooth (101) is an arc-shaped convex in the longitudinal section of the drum-shaped tooth coupling (10) in the direction away from the axis of the drum-shaped tooth coupling (10). A first internal tooth adapted to the first external tooth (101) is provided at the end of the transmission shaft (5), and the first internal tooth and the first external tooth (101) are meshed.

3. The excitation device according to claim 2, wherein A second internal tooth (102) is provided on the inner peripheral surface of the annular base body, and a second external tooth adapted to the second internal tooth (102) is provided on the driving shaft (21) of the driving component (2), and the second external tooth and the second internal tooth (102) are meshed.

4. The excitation device according to claim 1, characterized in that, It further includes a lubricating oil tank (7) located in the vibrating box (1). The lubricating oil tank (7) is arranged below the gear (8) and / or the eccentric block (6) and is configured such that the lower ends of the gear (8) and / or the eccentric block (6) are immersed in the lubricating oil in the lubricating oil tank (7), so that the lubricating oil in the lubricating oil tank (7) splashes as the gear (8) and / or the eccentric block (6) rotates.

5. The excitation device according to claim 4, characterized in that, The lubricating oil tank (7) extends along the diameter direction of the gear (8), and the height of the bottom of the lubricating oil tank (7) gradually increases along the end in the diameter direction close to the gear (8).

6. The excitation device according to claim 4, wherein The lower ends of the two gears (8) are both located in the lubricating oil tank (7).

7. The excitation device according to claim 4, wherein The lubricating oil tank (7) is higher than the bottom surface of the vibrating box (1), and an oil inlet hole (71) leading to the bottom of the vibrating box (1) is provided at the bottom of the lubricating oil tank (7).

8. The exciting device according to any one of claims 1 to 7, characterized in that It further includes a bearing (3) sleeved on the transmission shaft (5) and a bearing seat (4) installed on the side wall of the vibrating box (1). The bearing seat (4) has an inner cavity for installing the bearing (3). An oil collecting groove (41) is provided on the part of the bearing seat (4) located inside the vibrating box (1), and a lubricating oil hole (42) communicating the oil collecting groove (41) and the inner cavity of the bearing seat (4) for accommodating the bearing (3) is further provided on the bearing seat (4).

9. The excitation device according to claim 8, characterized in that, The oil collecting groove (41) is arranged at the upper end of the bearing seat (4), and the opening of the oil collecting groove (41) faces upward.

10. The excitation device according to claim 8, characterized in that The cross-section of the oil collecting tank (41) gradually increases in the direction close to the open end of the oil collecting tank (41).

11. The excitation device according to claim 1, characterized in that, Heat dissipation ribs (11) are provided on the outer wall of the excitation box (1).

12. The excitation device according to claim 1, characterized in that, The gear (8) is a helical gear.

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