Single-shaft high-speed vibration exciter

Abstract

A single-shaft high-speed vibration exciter relates to the technical field of vibration exciters, and adopts the technical scheme that the single-shaft high-speed vibration exciter comprises a driving unit and a vibration excitation unit, and the driving unit is a double-output-shaft motor; the two vibration excitation units are arranged on the two sides of the driving unit respectively, each vibration excitation unit comprises a bearing seat, a transmission shaft rotationally connected with the bearing seat and two eccentric assemblies arranged on the two sides of the bearing seat respectively, the eccentric assemblies are connected with the transmission shafts, and the transmission shafts are in transmission connection with output shafts of the double-output-shaft motors. The two excitation units are symmetrically arranged on the two sides of the driving unit, each excitation unit is provided with the two eccentric assemblies, and compared with the prior art, higher excitation force can be provided, higher rotating speed can be supported, the structure is simple, the failure rate is low, maintenance is convenient, and the service life is long; the eccentric assembly can adopt an adjustable eccentric block and is used for accurately adjusting the exciting force so as to improve the vibration condition of the vibration equipment according to the actual condition.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrators, in particular to a single-axis high-speed vibrator. Background Art

[0002] The vibrator is a device attached to certain vibration equipment to generate an excitation force. It is an important component for utilizing mechanical vibration. Currently, the most widely used is the eccentric block external vibrator. The overall structure has the characteristics of light weight, compact structure, centralized lubrication of transmission parts, easy maintenance, and low manufacturing cost. In existing vibration equipment, the requirements for the size of the exciting force are different. When the exciting force needs to be adjusted, it is often necessary to replace different vibrators or adjust the mass and eccentricity of the eccentric block. The patent with announcement number CN214289285U discloses a single-axis beam vibrator for a relaxation screen. The two ends of the main shaft are respectively fixed with eccentric block assemblies. The main shaft has a small installation height and light weight, which reduces the motor power. However, due to structural limitations, the exciting force it provides is insufficient and cannot be applied to large and medium-sized vibration equipment. Utility Model Content

[0003] In view of the problem of insufficient exciting force in the prior art solutions, the utility model provides a single-axis high-speed exciter.

[0004] The utility model provides the following technical solution: a single-axis high-speed vibrator, comprising:

[0005] A driving unit, wherein the driving unit is a double-output shaft motor;

[0006] The two excitation units are respectively arranged on both sides of the driving unit, and the excitation units include a bearing seat, a transmission shaft rotatably connected to the bearing seat, and two eccentric components respectively arranged on both sides of the bearing seat, the eccentric components are connected to the transmission shaft, and the transmission shaft is transmission-connected to the output shaft of the dual-output shaft motor.

[0007] Preferably, the two eccentric components on both sides of the bearing seat are symmetrical about the center line of the bearing seat, and the two excitation units are symmetrical about the center line of the dual-output shaft motor.

[0008] Preferably, a connecting cover is bolted between the bearing seat and the dual-shaft motor; and an eccentric component shield is bolted to the side of the bearing seat away from the dual-shaft motor.

[0009] Preferably, the output shaft of the dual-output shaft motor is connected to the transmission shaft via a coupling, and the coupling is located in the connection cover.

[0010] Preferably, the eccentric assembly comprises a fixed eccentric block fixedly connected to the transmission shaft and an adjustable eccentric block detachably connected to the transmission shaft, and the adjustable eccentric block is arranged on a side of the fixed eccentric block away from the bearing seat.

[0011] Preferably, the eccentric assembly includes an annular portion connected to the transmission shaft, the annular portion is connected to a fan-shaped portion, a flange is provided on the edge of the fan-shaped portion, a screw rod is rotatably connected between the flange and the annular portion, the screw rod is threadedly connected to a counterweight, and one end of the screw rod protrudes from the flange and is provided with a knob.

[0012] Preferably, the sector portion is provided with guide bars on both sides of the counterweight block, the guide bars are parallel to the screw rod, the guide bars are provided with sliding grooves, and the counterweight block is provided with sliding blocks slidably connected to the guide bars.

[0013] Preferably, the screw rod extends along the radial direction of the transmission shaft.

[0014] The beneficial effects of the utility model are as follows: the utility model has two exciting units symmetrically arranged on both sides of the driving unit, and each exciting unit is provided with two eccentric components. Compared with the prior art, it can provide stronger exciting force, support higher rotation speed, and has a simple structure, and has the advantages of low failure rate, convenient maintenance and long service life. The main components can all be cast, and the overall rigidity is strong; the eccentric component can adopt an adjustable eccentric block to adjust the exciting force, so as to improve the vibration condition of the vibration equipment according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a side view of an embodiment of the utility model.

[0016] Figure 2 It is a cross-sectional view of an embodiment of the utility model.

[0017] Figure 3 A schematic diagram of an embodiment of an eccentric assembly.

[0018] Figure 4 FIG. 4 is a schematic diagram of another embodiment of an eccentric assembly.

[0019] Figure numerals: 10, double-shaft motor; 11, coupling; 21, bearing seat; 22, transmission shaft; 23, eccentric assembly; 231, fixed eccentric block; 232, adjustable eccentric block; 233, annular portion; 234, fan-shaped portion; 235, screw rod; 236, counterweight; 237, guide groove; 238, knob; 30, connecting cover; 40, eccentric assembly cover. DETAILED DESCRIPTION

[0020] The following is a more detailed description of the implementation of the utility model in conjunction with the drawings and the figure marks, so that those skilled in the art can implement it after reading this specification. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model. Example

[0021] The utility model provides Figure 1-2 A single-axis high-speed vibration exciter is shown, comprising a driving unit and vibration excitation units respectively arranged on both sides of the driving unit. The driving unit drives the eccentric components of the vibration excitation units on both sides to rotate, providing double the exciting force, so as to be suitable for large and medium-sized vibration equipment with higher requirements for exciting force.

[0022] Please refer to Figure 2 The driving unit is a double-shaft motor 10, with output shafts at both ends. The double-shaft motor 10 is located at the center of the exciter, and the excitation units on both sides are symmetrical about the center line x1 of the double-shaft motor 10. The excitation unit includes a bearing seat 21, a transmission shaft 22 rotatably connected to the bearing seat 21, and two eccentric components 23 respectively arranged on both sides of the bearing seat 21. The two eccentric components 23 on both sides of the bearing seat 21 are symmetrical about the center line x2 of the bearing seat 21.

[0023] The bearing seat 21 includes a cylindrical seat body, two bearings arranged inside the seat body, and two end covers. The transmission shaft 22 is rotatably connected to the seat body through two bearings. The middle part has the largest diameter. A plurality of positioning shoulders are arranged from the middle to both sides, which respectively play a positioning role for the bearings, end covers, and eccentric components 23. One end of the transmission shaft 22 is connected to the output shaft at one end of the double-shaft motor 10 through the coupling 11. The double-shaft motor 10 drives the multiple eccentric components 23 to rotate through the transmission shaft 22 to generate an exciting force. The coupling 11 can be an elastic coupling. The double-shaft motor 10 can use a variable frequency motor to obtain different rotation speeds and achieve different exciting frequencies. The eccentric component 23 can use a fixed eccentric block, which transmits torque to the transmission shaft through a flat key and is locked on the outside by bolts.

[0024] Please refer to Figure 1 A protective cover is provided outside the double-shaft motor 10, and a connecting cover 30 is bolted between the bearing seat 21 and the protective cover of the double-shaft motor 10, which covers the transmission shaft, eccentric assembly, coupling, and output shaft of the double-shaft motor to prevent dust and protect it. The connecting cover 30 can be formed into a cylindrical structure by bolting two parts, and a flange is provided on the edge of each part, and bolt holes are provided on the flange to facilitate disassembly, assembly, and maintenance. An eccentric assembly shield 40 is bolted to the side of the bearing seat 21 facing away from the double-shaft motor 10 to protect the transmission shaft and the eccentric assembly. The bearing seat 21 is provided with a mounting base plate for bolting the entire exciter to the vibration equipment.

[0025] The utility model has two exciting units symmetrically arranged on both sides of the driving unit, and each exciting unit is provided with two eccentric components. Compared with the prior art, it can provide stronger exciting force and support higher rotation speed. The maximum rotation speed can reach 1160 rpm. It has a simple structure and has the advantages of low failure rate, easy maintenance and long service life. The main components can be cast and have strong overall rigidity. Example

[0026] The utility model provides a single-axis high-speed vibration exciter. Based on the first embodiment, the eccentric component 23 is an adjustable eccentric component, which is used to adjust the exciting force provided by the vibration exciter to the vibration device when the vehicle is parked, so as to improve the vibration condition of the vibration device according to the actual situation.

[0027] Please refer to Figure 3 The eccentric assembly 23 includes a fixed eccentric block 231 fixedly connected to the transmission shaft 22 and an adjustable eccentric block 232 detachably connected to the transmission shaft 22, and the adjustable eccentric block 232 is arranged on the side of the fixed eccentric block 231 away from the bearing seat 21. The fixed eccentric block 231 and the adjustable eccentric block 232 are both provided with a clamp structure, and the connection with the transmission shaft 22 is achieved through this clamp structure. When adjusting the exciting force, the bolts on the clamp structure of the adjustable eccentric block 232 are loosened so that the adjustable eccentric block 232 can rotate relative to the transmission shaft 22, and the angle α between the adjustable eccentric block 232 and the fixed eccentric block 231 is adjusted with reference to the angle scale set on the side of the fixed eccentric block 231 facing the adjustable eccentric block 232. After the adjustment is completed, the clamp structure of the adjustable eccentric block 232 is locked to change the eccentricity of the entire eccentric assembly, thereby changing the magnitude of the exciting force. The adjustment range of the angle α is 0~180°. Generally, the smaller the angle α is, the greater the exciting force and the amplitude are. Example

[0028] The utility model provides a single-axis high-speed exciter. Different from the second embodiment, the eccentric component 23 in the present embodiment has a different way of adjusting the eccentricity. Since the space is relatively small, it is very inconvenient to adjust the eccentric component between the bearing seat 21 and the double-output shaft motor 10 using the eccentric component adjustment method provided in the second embodiment, which affects the work efficiency. The present embodiment provides another eccentricity adjustment method that is easy to adjust.

[0029] Please refer to Figure 4The eccentric assembly 23 includes an annular portion 233 connected to the transmission shaft 22, the annular portion 233 is connected to a fan-shaped portion 234, the edge of the fan-shaped portion 234 is provided with a flange, a screw rod 235 is rotatably connected between the flange and the annular portion 233, and a counterweight 236 is threadedly connected to the screw rod 235. The counterweight 236 can be made of hard alloy, and its density is greater than the main fan-shaped portion of the eccentric assembly to reduce the volume of the counterweight. The screw rod 235 extends in the radial direction of the transmission shaft 22, and the distance between the counterweight 236 and the transmission shaft 22 can be adjusted by rotating the screw rod 235, thereby adjusting the eccentricity of the entire eccentric assembly. Specifically, one end of the screw rod 235 protrudes from the flange and is provided with a knob 238, and the screw rod 235 is driven to rotate by rotating the knob. Compared with Example 2, there is no need to disassemble and assemble the eccentric assembly, and the method of adjusting the eccentricity is simpler.

[0030] Preferably, the fan-shaped portion 234 is provided with a guide groove 237 engaged with the counterweight, and both ends of the counterweight 236 are engaged with the two side walls of the guide groove 237, and the two side walls of the guide groove 237 are parallel to the screw rod 235. When the counterweight 236 moves, it slides relative to the guide groove 237, thereby enhancing the stability of the counterweight 236. A length scale for calibrating the moving distance is also provided on the surface of the fan-shaped portion 234.

[0031] The above are one or more embodiments of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A uniaxial high-speed vibrator, characterized in that: include: A driving unit, wherein the driving unit is a double-output shaft motor; The two excitation units are respectively arranged on both sides of the driving unit, and the excitation units include a bearing seat, a transmission shaft rotatably connected to the bearing seat, and two eccentric components respectively arranged on both sides of the bearing seat, the eccentric components are connected to the transmission shaft, and the transmission shaft is transmission-connected to the output shaft of the dual-output shaft motor.

2. A uniaxial high-speed vibration exciter according to claim 1, characterized in that: The two eccentric components on both sides of the bearing seat are symmetrical about the center line of the bearing seat, and the two excitation units are symmetrical about the center line of the dual-output shaft motor.

3. A uniaxial high-speed vibration exciter according to claim 1, characterized in that: A connecting cover is bolted between the bearing seat and the double-output shaft motor; and an eccentric component shield is bolted to the side of the bearing seat away from the double-output shaft motor.

4. A uniaxial high-speed vibration exciter according to claim 3, characterized in that: The output shaft of the double-output shaft motor is connected to the transmission shaft through a coupling, and the coupling is located in the connection cover.

5. The uniaxial high-speed vibration exciter according to claim 1, characterized in that: The eccentric assembly comprises a fixed eccentric block fixedly connected to the transmission shaft and an adjustable eccentric block detachably connected to the transmission shaft, and the adjustable eccentric block is arranged on a side of the fixed eccentric block away from the bearing seat.

6. A uniaxial high-speed vibration exciter according to claim 1, characterized in that: The eccentric assembly includes an annular portion connected to the transmission shaft, the annular portion is connected to a fan-shaped portion, a flange is provided on the edge of the fan-shaped portion, a screw rod is rotatably connected between the flange and the annular portion, a counterweight is threadedly connected to the screw rod, and one end of the screw rod protrudes from the flange and is provided with a knob.

7. A uniaxial high-speed vibration exciter according to claim 6, characterized in that: The fan-shaped portion is provided with a guide groove engaged with the counterweight block, and two side walls of the guide groove are parallel to the screw rod.

8. A uniaxial high-speed vibration exciter according to claim 6, characterized in that: The screw rod extends along the radial direction of the transmission shaft.

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