A vibration exciter

Abstract

The utility model relates to a kind of exciting device, comprising: mounting substrate;Double-stretching-shaft motor, multiple and along the circumferential interval of the mounting substrate are set, the double-stretching-shaft motor vertically penetrates the mounting substrate and is fixedly connected with it, the double-stretching-shaft motor includes upper output shaft and lower output shaft, the upper output shaft is located the upper side of the mounting substrate and is sequentially connected with cam assembly and drive gear, the lower output shaft is located the lower side of the mounting substrate and is connected with cam assembly;Slewing bearing, including mutually rotatingly connected support ring and external gear, the support ring is fixedly connected with the mounting substrate, the external gear is engaged with all the drive gear simultaneously. The present application adopts multiple motor distributed power layout, break through the power limit of traditional single motor vibration equipment, realize big exciting force output, and realize the forced synchronous operation of multiple motor by setting slewing bearing with external gear, and synchronous precision is high.

Description

Technical Field

[0001] This utility model relates to the field of mechanical vibration technology, specifically to a vibration excitation device. Background Technology

[0002] Excitation devices are used for vibration excitation and can provide vibration excitation for industrial equipment such as large vibrating screens, feeders, and molding machines. Existing excitation devices usually install a rotating body on the rotating shaft of a motor, so that the center of gravity of the rotating body is off the rotating shaft. Vibration is generated by the rotation of the rotating body, and vibration can be used to achieve functions such as material mixing, screening, conveying, compaction, and molding.

[0003] Currently, two types of vibration excitation devices are available on the market: single-motor excitation devices using a single motor and multi-motor excitation devices using multiple motors. However, single-motor excitation devices, due to their limited power output from only one motor, cannot meet the power requirements of extra-large equipment. As for multi-motor excitation devices, the poor synchronization accuracy of the multiple vibration motors during startup and operation affects the output efficiency and quality of vibration excitation. Utility Model Content

[0004] To address the problems of insufficient excitation force or low synchronization accuracy of existing excitation devices, the purpose of this invention is to provide a vibration device that can provide ultra-high torque excitation force with distributed power sources, while ensuring high synchronization accuracy and stable and reliable operation of multiple power sources.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vibration excitation device includes: a mounting base; multiple dual-shaft motors arranged at circumferential intervals along the mounting base, the dual-shaft motors penetrating vertically through the mounting base and fixedly connected thereto, each dual-shaft motor including an upper output shaft and a lower output shaft, the upper output shaft being located on the upper side of the mounting base and sequentially connected to a cam assembly and a drive gear, the lower output shaft being located on the lower side of the mounting base and connected to a cam assembly; and a slewing bearing including a support ring and an external gear rotatably connected to each other, the support ring being fixedly connected to the mounting base, and the external gear simultaneously meshing with all the drive gears.

[0007] Furthermore, the cam assembly includes two cam units, each of which has a connecting hole and a connecting groove is provided in the connecting hole. The outer periphery of the upper output shaft and / or the lower output shaft is provided with a connecting protrusion that engages with the connecting groove.

[0008] Furthermore, one cam unit in the cam assembly has a dial on its surface and an included angle scale on its outer periphery, the other cam unit has a first scale on its outer periphery corresponding to the included angle scale, and the outer periphery of the upper output shaft and / or the lower output shaft is provided with a second scale corresponding to the dial.

[0009] Furthermore, the misalignment angle between the two cam units in the cam assembly is 30°-90°.

[0010] Furthermore, it also includes multiple motor mounting seats corresponding one-to-one with the dual-shaft motor. The motor mounting seats penetrate vertically through the mounting base plate and are fixedly connected to it. The dual-shaft motor is fixedly installed in the motor mounting seat.

[0011] Furthermore, the motor mounting base has an upper mounting flange at its upper end and a lower mounting flange at its lower end. The upper mounting flange is fixedly connected to the upper end of the dual-shaft motor, and the lower mounting flange is fixedly connected to the lower end of the dual-shaft motor.

[0012] Furthermore, the motor mounting base has an air inlet on the lower side and an air outlet on the upper side.

[0013] Furthermore, it also includes a grid plate, with multiple grid plates spaced axially within the motor mounting base. Each grid plate has multiple through holes, and the density of the through holes on the grid plate decreases sequentially from the air inlet to the air outlet.

[0014] Furthermore, it also includes a support rod, one end of which is fixedly connected to the mounting base plate, and the other end of which is fixedly connected to the support ring.

[0015] Furthermore, it also includes an upper protective cover and a lower protective cover, the upper protective cover being fixedly connected to the upper end face of the mounting base plate and having a first ventilation hole, and the lower protective cover being fixedly connected to the lower end face of the mounting base plate and having a second ventilation hole.

[0016] The beneficial effects that this utility model can achieve are as follows:

[0017] This utility model, through the design of power distribution and centralized control, adopts a multi-motor distributed power layout, breaks through the power limit of traditional single-motor excitation devices, achieves large excitation force output, and achieves forced synchronous operation of multiple motors by setting a slewing bearing with transmission gears. The synchronization accuracy of multiple motors is high and the stability is good. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a three-dimensional structural diagram of the excitation device (with the upper protective cover removed).

[0020] Figure 2 This is a top view of the excitation device;

[0021] Figure 3 This is the front view of the excitation device (with the upper and lower protective covers removed).

[0022] Figure 4 A front view of the vibration generator (including the upper and lower protective covers);

[0023] Figure 5 This is a top view of the cam assembly and related structures;

[0024] Figure 6 This is the main view of the cam assembly and related structures;

[0025] Figure 7 This is a structural diagram of the flow equalization device;

[0026] Figure 8 This is a structural diagram of the grating plate. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "upper," "lower," "left," "right," and similar expressions used to indicate orientation are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] See Figure 1-3 As shown, the excitation device in this embodiment includes a mounting base plate 10. A dual-shaft motor 30 is mounted on the mounting base plate 10, with multiple dual-shaft motors 30 spaced circumferentially along the mounting base plate 10. Each dual-shaft motor 30 vertically penetrates the mounting base plate 10 and is fixedly connected to it. The number of dual-shaft motors 30 can be 2-16, depending on the excitation force requirements of the target equipment (e.g., large vibrating industrial equipment such as vibrating mixers, vibrating furnaces, vibrating screens, vibrating feeders, and vibrating molding machines). Each dual-shaft motor 30 has two output shafts: an upper output shaft 31 and a lower output shaft 33. The upper output shaft 31 is located on the upper side of the mounting base plate 10, and the lower output shaft 33 is located on the lower side of the mounting base plate 10. A cam assembly 50 and a drive gear 32 are sequentially connected to each upper output shaft 31. The drive gear is a spur gear, positioned closer to the free end of the upper output shaft 31 than the cam assembly 50. A cam assembly 50 is also connected to each lower output shaft 33. A slewing bearing 60 is also provided on the mounting base plate 10, which includes a support ring 62 and an external gear 61 rotatably connected to each other. The support ring 62 serves as a support component and is fixedly connected to the mounting base plate 10, while the external gear 61 serves as a power transmission component and has transmission teeth on its outer side. The tooth surface of the transmission teeth is carburized and quenched to a surface hardness of HRC58-62. The external gear 61 meshes with all the drive gears 32 simultaneously, that is, the drive gears 32 are circumferentially spaced on the outer side of the external gear 61 and mesh with it.

[0031] Since the drive gears 32 driven by the dual-shaft motors mesh simultaneously with the external gears 61, a mechanically forced synchronization mechanism is formed. When the dual-shaft motors 30 start and accelerate smoothly from low speed to rated speed, they will drive the drive gears 32 fixed on the output shaft to rotate synchronously. The slewing bearing 60, which is fixed to the mounting base plate 10 by the support rod 10, has its external gear 61 rigidly meshing with the drive gears 32 of all the dual-shaft motors 30. The rotation of each drive gear 32 jointly drives the rotation of the external gear 32. Through the mechanical constraint of gear meshing, multiple dual-shaft motors 30 are mechanically forced to operate synchronously, achieving high synchronization accuracy and outputting high-quality vibration excitation as required. In addition, this embodiment adopts a gear transmission method. The gear transmission system uses a rigid meshing method of tooth surfaces to transmit power, which has the characteristics of constant transmission ratio, compact structure, and high transmission efficiency.

[0032] See also Figure 1-3 The structure of the vibration generator is further described below. The mounting base 10 can be ring-shaped or rectangular, made of high-strength steel, precision-machined by large CNC machining equipment, and its surface is zinc-sprayed before being coated with a high-temperature resistant and corrosion-resistant coating. The mounting base 10 can be rigidly connected to the base of the target working equipment via prestressed bolts, thereby connecting the vibration generator to the target working equipment and transmitting the vibration excitation generated by the vibration generator to the target working equipment. In addition, locating pins are provided in the radially symmetrical direction of the mounting base to achieve precise installation with the target working equipment.

[0033] To facilitate the mounting of the dual-shaft motor 30 on the mounting base plate, a plurality of motor mounting seats 20 corresponding one-to-one with the dual-shaft motor 30 are provided on the mounting base plate 10. The motor mounting seats 20 are spaced apart circumferentially on the mounting base plate 10, vertically penetrating and fixedly connected to it. Each motor mounting seat 20 is cylindrical in shape, vertically penetrating and fixed to the mounting base plate 10, with one part located on the upper side and the other on the lower side. The upper end of the motor mounting seat 20 has an upper mounting flange 23, and the lower end has a lower mounting flange 24. The dual-shaft motor 30 is disposed in the motor mounting seat 20, with the upper mounting flange 23 fixedly connected to the upper end of the dual-shaft motor 30, and the lower mounting flange 24 fixedly connected to the lower end of the dual-shaft motor 30. Furthermore, the upper side of the motor mounting seat 20 has a plurality of circumferentially spaced exhaust ports 21, and the lower side has a plurality of circumferentially spaced air inlets 22. Cooling air can enter the motor mounting base 20 from the air inlet 22 to cool the double-shaft motor 30 located in the motor mounting base 20, and then be discharged from the air outlet 21 to remove the heat from the double-shaft motor 30.

[0034] In order to support and fix the slewing bearing 60, a support rod 40 is also provided. One end of the support rod 40 is fixedly connected to the mounting base 10, and the other end is fixedly connected to the support ring 62, so that the slewing bearing 60 is supported by the support rod 14.

[0035] See Figure 4 As shown, the vibration excitation device in this embodiment also includes a protective cover assembly, which includes an upper cover 12 and a lower cover 11 fixedly connected to the front and back sides of the mounting base plate 10. The main body of the protective cover is made of high-strength lightweight metal by integral stamping, the outer surface is sprayed with a high-temperature resistant and corrosion-resistant coating, and the inner wall is lined with a sound-absorbing cotton layer. The upper cover 12 is provided with a first ventilation hole 121 in the circumferential direction, while the lower cover 11 is provided with a second ventilation hole 111 in the circumferential direction.

[0036] See Figure 5-6The structure of the cam assembly 50 is described below. The cam assembly 50 has at least one cam unit 51. The number of cam units 51 can vary depending on requirements. When the required excitation force is small, the cam assembly 50 may include only a single cam unit 51; when the required excitation force is large, two or more cam units 51 may be stacked together. For example, see [link to example]. Figure 5 As shown, the cam assembly 50 has two cam units 51. Each cam unit 51 has a connecting hole with a connecting groove 511 inside. The outer periphery of the output shaft (including the upper output shaft 31 and the lower output shaft 33) has a connecting protrusion (not shown) that engages with the connecting groove 511. The cam unit 51 is connected to the output shaft via the connecting groove 511 and the connecting protrusion, so that the rotation of the output shaft drives the cam unit 51 to rotate accordingly. The cam unit 51 is eccentrically positioned, forming an eccentric oscillator, and vibration is generated by the rotation of the cam unit 51. See also... Figure 6 As shown, the upper output shaft 31 can be configured as a stepped shaft, and two cam units 51 are sequentially sleeved on the upper output shaft 31, with the cam units 51 axially positioned by a fastening nut 52. In this embodiment, since the output shaft and the cam units 51 are connected by a connecting protrusion and a connecting groove, the misalignment angle between the two cam units 51 can be adjusted to adjust the magnitude of the output excitation force. When it is necessary to adjust the misalignment angle between the two cam units 51, the fastening nut 52 can be loosened first, and the upper cam unit 51 can be moved upward to disengage the connecting protrusion from the connecting groove. Then, the cam unit 51 can be rotated to a preset angle and re-sleeved onto the part of the output shaft with the connecting protrusion. Finally, the fastening nut 52 can be tightened again to complete the adjustment of the misalignment angle. In this way, the relative angle between the cam unit 51 and the output shaft, as well as the misalignment angle between the two cam units 51, can be adjusted.

[0037] To achieve precise angle adjustment, on one hand, the upper cam unit 51 has a dial 513 on its surface, and a second scale 311 corresponding to the dial 513 is provided on the outer periphery of the output shaft. By observing the relative position of the second scale 311 on the dial 513, the relative angle between the upper cam unit 51 and the output shaft can be determined. On the other hand, the outer periphery (circumferential side) of the upper cam unit 51 also has an included angle scale 512, and the outer periphery of the lower cam unit 51 has a first scale 514 corresponding to the included angle scale 512. By observing the relative position of the first scale 514 on the included angle scale 512, the misalignment angle between the upper and lower cam units 51 can be determined, thereby achieving precise adjustment of their misalignment angle. For each cam assembly 50, different excitation forces can be obtained by adjusting the relative misalignment angle of the cam units 51. In addition, different vibration modes and excitation forces can also be obtained by adjusting the misalignment angle between the cam assemblies 50 on the upper and lower output shafts. Specifically, for each cam assembly 50, the misalignment angle between the two cam units 51 can be adjusted within the range of 0°-90°; for the cam assemblies located on the upper and lower sides of the dual-shaft motor 30, the misalignment angle between the cam assembly 50 located on the upper side of the dual-shaft motor 30 and the cam assembly 50 located on the lower side of the dual-shaft motor 30 can be adjusted within the range of 0°-120°.

[0038] See Figure 7-8 The structure of the flow equalization device 90 is described below. The flow equalization device 90 includes multiple grid plates 91, each a perforated plate structure arranged in a ring, with multiple through holes 93. The through holes 93 penetrate the upper and lower end faces of the grid plate 91 and are evenly or unevenly distributed along the circumference. Threaded connection holes 95 are also provided on the grid plate 91. For example, there are four threaded connection holes 95, evenly spaced along the circumference of the grid plate 91. Adjacent grid plates 91 are connected by connecting rods 92. One end of the connecting rod 92 is connected to one grid plate 91 through a threaded connection hole 95, and the other end is connected to another grid plate 91 through a threaded connection hole 95, thereby achieving series connection of multiple grid plates 91.

[0039] See also Figure 4 As shown, the flow equalization device 90 is installed inside the motor mounting base 20, and multiple grille plates 91 are embedded in the motor mounting base 20 and arranged along the axial direction. The through holes 93 on the multiple grille plates 91 have a gradually decreasing density distribution, with the density of the through holes 93 on the air inlet 22 side being greater than that on the air outlet 21 side. Therefore, along the direction from the air inlet 22 to the air outlet 21, the density of the through holes on the multiple axially arranged grille plates 91 decreases sequentially, allowing the cooling air to be evenly distributed to achieve a uniform ejector-type air distribution method.

[0040] When cooling air is introduced through the first ventilation hole 111 of the lower cover 11 and enters the interior of the motor mounting base 20 through the air inlet 22 at the lower end of the motor mounting base 20, it flows evenly through multiple grille plates 91 inside the motor mounting base 20 and forms a good covering on the housing of the dual-shaft motor 30, thereby cooling the dual-shaft motor 30. At this time, the cooling air becomes hot air. The hot air is discharged from the exhaust port 21 and then enters the cavity of the upper cover 12, and diffuses into the surrounding environment through the ventilation holes 121 of the upper cover 12.

[0041] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. The protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A vibration excitation device, characterized in that, include: Mounting substrate (10); A plurality of dual-shaft motors (30) are provided and are spaced apart circumferentially along the mounting base plate (10). The dual-shaft motors penetrate the mounting base plate vertically and are fixedly connected thereto. The dual-shaft motors (30) include an upper output shaft (31) and a lower output shaft (33). The upper output shaft (31) is located on the upper side of the mounting base plate (10) and is connected in sequence to a cam assembly (50) and a drive gear (32). The lower output shaft (33) is located on the lower side of the mounting base plate and is connected to the cam assembly (50). The slewing bearing (60) includes a support ring (62) and an external gear (61) that are rotatably connected to each other. The support ring (62) is fixedly connected to the mounting base plate (10), and the external gear meshes with all of the drive gears simultaneously.

2. The excitation device according to claim 1, characterized in that, The cam assembly (50) includes two cam units (51), each of which has a connecting hole and a connecting groove is provided in the connecting hole. The outer periphery of the upper output shaft and / or the lower output shaft is provided with a connecting protrusion that engages with the connecting groove.

3. The excitation device according to claim 2, characterized in that, One of the cam units (51) in the cam assembly (50) has a dial (513) on its surface and an included angle scale (512) on its outer periphery. The outer periphery of the other cam unit has a first scale (521) corresponding to the included angle scale. The outer periphery of the upper output shaft and / or the lower output shaft is provided with a second scale (514) corresponding to the dial.

4. The excitation device according to claim 2, characterized in that, The misalignment angle between the two cam units in the cam assembly (50) is 0°-90°.

5. The excitation device according to claim 1, characterized in that, It also includes multiple motor mounting seats (20) corresponding one-to-one with the dual-shaft motor. The motor mounting seats (20) penetrate vertically through the mounting base plate (10) and are fixedly connected to it. The dual-shaft motor (30) is fixedly disposed in the motor mounting seat (20).

6. The excitation device according to claim 5, characterized in that, The motor mounting base (20) has an upper mounting flange (23) at its upper end and a lower mounting flange (24) at its lower end. The upper mounting flange is fixedly connected to the upper end of the double-shaft motor (30), and the lower mounting flange is fixedly connected to the lower end of the double-shaft motor (30).

7. The excitation device according to claim 5, characterized in that, The motor mounting base (20) has an air inlet (22) on the lower side and an air outlet (21) on the upper side.

8. The excitation device according to claim 5, characterized in that, It also includes a grid plate (91), a plurality of the grid plates are arranged axially spaced within the motor mounting base (20), the grid plate (91) has a plurality of through holes (911), and the density of the through holes (911) on the grid plate decreases sequentially along the direction from the air inlet to the air outlet.

9. The excitation device according to claim 1, characterized in that, It also includes a support rod (40), one end of which is fixedly connected to the mounting base plate (10), and the other end is fixedly connected to the support ring.

10. The excitation device according to claim 1, characterized in that, It also includes an upper protective cover and a lower protective cover. The upper protective cover is fixedly connected to the upper end face of the mounting base plate and has a first ventilation hole, and the lower protective cover is fixedly connected to the lower end face of the mounting base plate and has a second ventilation hole.

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