Variable-mass small-amplitude linear vibration exciter

Abstract

The invention discloses a variable-mass small-amplitude linear vibration exciter, which comprises a vibration exciter shell, a variable-mass vibration exciter, a variable-mass vibration exciter and a linear vibration exciter, the N-shaped steel rail is vertically and fixedly connected to the opening in the front side of the vibration exciter shell; the counterweight assembly is vertically connected to the N-shaped steel rail in a sliding manner; the connecting rod mechanism is mounted in the vibration exciter shell; the quick mounting and dismounting mechanism is mounted on the connecting rod mechanism, a horizontal sliding groove is formed in the counterweight assembly, and the output end of the quick mounting and dismounting mechanism is slidably connected into the horizontal sliding groove; wherein the connecting rod mechanism is used for pushing the quick mounting and dismounting mechanism to reciprocate in the vertical direction. The connecting rod mechanism is high in energy conversion and transmission efficiency, energy loss is reduced, and due to the fact that the connecting rod mechanism is simple in structure, fault points are reduced, and maintenance is easy.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical vibration, in particular to a variable-mass small-amplitude linear vibrator. Background Art

[0002] Vibrators can be divided into pneumatic vibrators, hydraulic vibrators, piezoelectric vibrators, electromagnetic vibrators, electric vibrators and mechanical vibrators according to different excitation principles. Among them, pneumatic vibrators have a certain amount of energy loss in the release process of compressed air, and the energy conversion efficiency is relatively low. In addition, the control accuracy of vibration parameters (such as amplitude and frequency) is low, and it is difficult to achieve fine adjustment; hydraulic vibrators need to pay attention to the temperature at all times when in use, and when the frequency is high, the output waveform is easily distorted; piezoelectric vibrators have a complex structure, high cost, and are difficult to use in some harsh environments; electromagnetic vibrators are difficult to output simple harmonic exciting force, and due to the eddy current effect, the exciting force may decrease; when the exciting force of the electric vibrator increases, its mass will also increase during design; the excitation frequency of the mechanical vibrator is difficult to increase, and there are problems such as motor heating and bearing wear.

[0003] The utility model patent for "Linear Exciter" with publication number CN 202321134409.3 proposes a new linear exciter, which increases the effective magnetic field area and improves the working efficiency of the driving coil by arranging permanent magnets perpendicular to the excitation direction. The exciter includes a cylinder body, a stator assembly, a mover assembly, an excitation rod and a table, as well as a magnetic matching assembly (at least one permanent magnet and one driving coil). The magnetic pole direction of the permanent magnet is perpendicular to the movement direction of the excitation rod, and one magnetic pole faces the driving coil. The structural design of the exciter in this scheme is complex and the manufacturing cost is high. At the same time, it may be affected by the eddy current effect, resulting in a decrease in the exciting force.

[0004] The utility model patent for "Linear Vibrator" with publication number CN202321137988.7 proposes a new type of linear vibrator, which realizes the relative movement of the stator assembly and the mover assembly through magnetic matching components (grooves and protrusions), and increases or decreases the vibration thrust by adjusting the number of protrusions and grooves, while maintaining a compact structure. Through the matching method of protrusions and grooves, the adjustability of the vibration thrust of the excitation rod is achieved, the vibration thrust is increased while maintaining a compact structure, and the guiding performance and load-bearing capacity of the vibrator are improved. In this solution, the vibrator adopts a magnetic matching component, which increases the manufacturing and assembly complexity of the vibrator. Although the design considers increasing the vibration thrust while maintaining a compact structure, the increased number of components may affect the overall reliability.

[0005] The invention patent "A New Linear Vibration Exciter" with publication number CN202023213160.4 provides a new linear vibration exciter. The exciter includes a box body, which is equipped with a sealed heat dissipation structure and an adsorption component. The sealed heat dissipation structure contains a variety of components, such as bearing glands, labyrinth seals, pendulum blocks, counterweight shafts, etc., and uses SKF special large clearance self-aligning vibration bearings. In this solution, the temperature and vibration parameters of the bearings are monitored by vibration sensors when the exciter is working, which increases production costs. The magnetic oil plug in the solution can be used to absorb iron filings in the lubricating oil, but it needs to be cleaned regularly. Due to the use of multiple sealing and heat dissipation structures, the overall weight of the exciter is large.

[0006] Based on the above reasons, the present invention provides a variable mass small amplitude linear exciter. Summary of the invention

[0007] The object of the present invention is to provide a small-amplitude linear vibration exciter with variable mass to solve the problems existing in the prior art.

[0008] To achieve the above object, the present invention provides the following solution: The present invention provides a variable mass small amplitude linear exciter, comprising:

[0009] An exciter housing, wherein the front side of the exciter housing is configured to be open;

[0010] An N-shaped steel rail, the N-shaped steel rail is vertically fixedly connected to the opening on the front side of the vibration exciter housing;

[0011] A counterweight assembly, the counterweight assembly being vertically slidably connected to the N-shaped rail;

[0012] A connecting rod mechanism, wherein the connecting rod mechanism is installed in the vibration exciter housing;

[0013] A quick installation and disassembly mechanism, wherein the quick installation and disassembly mechanism is installed on the connecting rod mechanism, a horizontal slide groove is provided on the counterweight assembly, and an output end of the quick installation and disassembly mechanism is slidably connected in the horizontal slide groove;

[0014] Wherein, the connecting rod mechanism is used to drive the quick installation and removal mechanism to reciprocate in the vertical direction.

[0015] According to the variable-mass small-amplitude linear vibrator provided by the present invention, the counterweight assembly includes a counterweight block, which is slidably connected to the N-shaped steel rail, an additional weight block is detachably connected to one side of the counterweight block, and the horizontal slide groove is provided on the other side of the counterweight block, and the quick installation and disassembly mechanism is slidably matched with the counterweight block through the horizontal slide groove.

[0016] According to the variable mass small amplitude linear exciter provided by the present invention, the connecting rod mechanism includes a motor fixedly connected to the exciter housing, the output shaft of the motor is fixedly connected to an eccentric wheel, a rocker is rotatably connected to the eccentric wheel, the inner wall of the exciter housing is rotatably connected to a connecting rod, one end of the connecting rod is rotatably connected to the rocker, and the quick installation and disassembly mechanism is rotatably connected to the rocker.

[0017] According to the variable-mass small-amplitude linear vibration exciter provided by the present invention, a fixing seat is fixedly connected to the bottom of the vibration exciter housing, and the motor is fixedly connected to the fixing seat.

[0018] According to the variable-mass small-amplitude linear vibrator provided by the present invention, the output shaft of the motor is fixedly connected to the transmission shaft, and the eccentric wheel is fixedly connected to one end of the transmission shaft.

[0019] According to the variable mass small amplitude linear vibration exciter provided by the present invention, a mounting seat is installed on the inner wall of the vibration exciter housing, and the connecting rod is rotatably connected to the mounting seat.

[0020] According to the variable-mass small-amplitude linear vibrator provided by the present invention, the quick installation and disassembly mechanism includes a shell and a sliding rod, one end of the sliding rod is slidably matched with the shell, and the other end of the sliding rod is slidably connected in the horizontal slide groove, and a quick installation and disassembly component is installed at one end of the sliding rod located in the shell, and the sliding rod is detachably connected to the shell through the quick installation and disassembly component.

[0021] According to the variable mass small amplitude linear exciter provided by the present invention, the quick installation and disassembly component includes an elastic gasket, the end of the sliding rod is provided with a mounting groove, the elastic gasket is fixed in the mounting groove, the two ends of the elastic gasket are respectively fixedly connected with elastic pins, the side wall of the mounting groove is symmetrically provided with through holes, the two elastic pins extend out of the mounting groove through the through holes, the side wall of the outer shell is symmetrically provided with positioning grooves, the two elastic pins are respectively limited and matched with the two positioning grooves, a spring is arranged between the two elastic pins, and the two ends of the spring are fixedly connected to the ends of the elastic gasket.

[0022] The present invention discloses the following technical effects:

[0023] 1) When the present invention is working, the connecting rod mechanism drives the quick installation and disassembly mechanism to reciprocate in the vertical direction, and the quick installation and disassembly mechanism drives the counterweight assembly to reciprocate along the N-shaped rail, thereby causing the entire exciter to perform linear excitation.

[0024] 2) Compared with the traditional mechanical vibration exciter, the present invention has a compact design, occupies a small space, and is convenient for realizing the predetermined movement in a limited space.

[0025] 3) The connecting rod mechanism used in the present invention has high efficiency in converting and transmitting energy, reducing energy loss, and due to its simple structure, it reduces failure points and is easy to maintain.

[0026] 4) Compared with other vibrators, the vibration amplitude of the present invention is small and the exciting force is adjustable, and it is more suitable for small linear vibrating screens.

[0027] 5) The present invention is designed with a quick installation and disassembly mechanism, which can quickly install and disassemble the counterweight assembly. Compared with the existing pin fixation and bolt fixation, it has higher efficiency, safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 An axonometric view of a variable mass, small amplitude linear vibrator according to the present invention;

[0030] Figure 2 It is a front view of the connecting rod mechanism of the present invention;

[0031] Figure 3 It is a left side view of the connecting rod mechanism of the present invention;

[0032] Figure 4 It is an axonometric diagram of the quick installation and disassembly mechanism of the present invention;

[0033] Figure 5 is a cross-sectional view of the slide bar of the present invention;

[0034] Figure 6 It is the principle diagram of the connecting rod mechanism of the present invention.

[0035] Among them, 1. exciter housing; 2. connecting rod; 3. mounting seat; 4. motor; 5. fixing seat; 6. eccentric wheel; 7. rocker; 8. bearing cover; 9. additional weight block; 10. N-shaped rail; 11. counterweight block; 12. bearing; 13. transmission shaft; 14. quick installation and disassembly mechanism; 15. elastic gasket; 16. elastic pin; 17. spring; 18. housing. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figure 1-6 The present invention provides a variable mass small amplitude linear vibrator, comprising:

[0039] The exciter housing 1 has an opening at the front side;

[0040] An N-shaped steel rail 10, which is vertically fixedly connected to the opening on the front side of the vibration exciter housing 1;

[0041] A counterweight assembly, the counterweight assembly is vertically slidably connected to the N-shaped rail 10;

[0042] A connecting rod mechanism, wherein the connecting rod mechanism is installed in the vibration exciter housing 1;

[0043] A quick installation and disassembly mechanism 14 is installed on the connecting rod mechanism, a horizontal slide groove is provided on the counterweight assembly, and the output end of the quick installation and disassembly mechanism 14 is slidably connected in the horizontal slide groove;

[0044] The connecting rod mechanism is used to push the quick installation and removal mechanism 14 to reciprocate in the vertical direction.

[0045] When the present invention is working, the connecting rod mechanism pushes the quick installation and removal mechanism 14 to reciprocate in the vertical direction, and the quick installation and removal mechanism 14 pushes the counterweight assembly to reciprocate along the N-shaped rail 10, thereby causing the entire exciter to perform linear excitation.

[0046] A further optimized solution is that the counterweight assembly includes a counterweight block 11, which is slidably connected to the N-shaped steel rail 10, and an additional weight block 9 is detachably connected to one side of the counterweight block 11, and a horizontal slide groove is provided on the other side of the counterweight block 11, and a quick installation and disassembly mechanism 14 slides with the counterweight block 11 through the horizontal slide groove.

[0047] The additional weight block 9 is fixed to the counterweight block 11 by bolts.

[0048] In a further optimized solution, the connecting rod mechanism includes a motor 4 fixedly connected to the exciter housing 1, an eccentric wheel 6 is fixedly connected to the output shaft of the motor 4, a rocker 7 is rotatably connected to the eccentric wheel 6, a connecting rod 2 is rotatably connected to the inner wall of the exciter housing 1, one end of the connecting rod 2 is rotatably connected to the rocker 7, and a quick installation and disassembly mechanism 14 is rotatably connected to the rocker 7. The end of the connecting rod 2 is rotatably connected to the rocker 7 through a bearing 12.

[0049] According to a further optimized solution, a fixing seat 5 is fixedly connected to the bottom of the vibration exciter housing 1 , and the motor 4 is fixedly connected to the fixing seat 5 .

[0050] In a further optimized solution, the output shaft of the motor 4 is fixedly connected with the transmission shaft 13, and the eccentric wheel 6 is fixedly connected to one end of the transmission shaft 13. A bearing cap 8 is provided at the end of the transmission shaft 13, and the bearing cap 8 is fixed on the eccentric wheel 6.

[0051] According to a further optimized solution, a mounting seat 3 is installed on the inner wall of the vibration exciter housing 1 , and the connecting rod 2 is rotatably connected to the mounting seat 3 .

[0052] The power is output by the motor 4, and the eccentric wheel 6 is driven to rotate through the transmission shaft 13. The eccentric wheel 6 drives the rocker arm 7 to rotate around the corresponding curve of the eccentric shaft. The connecting rod 2 moves synchronously, and the extended part of the rocker arm 7 makes a nearly linear motion. The counterweight block 11 is pulled to slide in the vertical direction through the quick installation and disassembly mechanism 14. At the same time, the setting of the horizontal slide groove can make the quick installation and disassembly mechanism 14 have a certain sliding in the horizontal direction to ensure the stable sliding of the counterweight block 11.

[0053] A further optimized solution is that the quick installation and disassembly mechanism 14 includes a shell 18 and a sliding rod, one end of the sliding rod is slidingly matched with the shell 18, and the other end of the sliding rod is slidingly connected in a horizontal slide groove, and a quick installation and disassembly component is installed at one end of the sliding rod located in the shell 18, and the sliding rod is detachably connected to the shell 18 through the quick installation and disassembly component.

[0054] A further optimized solution is provided, in which the quick installation and disassembly component includes an elastic gasket 15, an installation groove is provided at the end of the slide rod, the elastic gasket 15 is fixed in the installation groove, and elastic column pins 16 are fixedly connected at both ends of the elastic gasket 15, and through holes are symmetrically provided on the side walls of the installation groove, and two elastic column pins 16 extend out of the installation groove through the through holes, and positioning grooves are symmetrically provided on the side walls of the outer shell 18, and the two elastic column pins 16 are respectively limited in position with the two positioning grooves, and a spring 17 is arranged between the two elastic column pins 16, and both ends of the spring 17 are fixedly connected to the ends of the elastic gasket 15.

[0055] Insert the slide bar into the shell 18 and push it inward until the elastic pin 16 reaches the positioning groove. Under the action of the spring 17 and the elastic gasket 15, the elastic pin 16 is pushed into the positioning groove to fix the slide bar and the shell 18. When disassembling, squeeze the elastic pin 16 and pull the shell 18 or the slide bar to separate the slide bar from the shell 18. In this way, the slide bar and the shell 18 can be quickly disassembled, which improves the disassembly speed between the two.

[0056] Reference Manual Attached Figure 6 In this embodiment, the eccentric length of the eccentric wheel 6 is regarded as a unit length rod, the rocker 7 is 2 times the unit rod, the connecting rod 2 is 4 times the unit rod, and the distance between the center of the eccentric wheel 6 and the mounting seat 3 is 4.5 times the unit rod. After finding the nearly linear motion point in the motion plane of the four-link 2, the area of ​​the rocker 7 is expanded, and a groove is opened at the linear motion point. A cylindrical groove is left inside the groove to facilitate the installation of the quick installation and disassembly mechanism 14.

[0057] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 therefore should not be understood as a limitation on the present invention.

[0058] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A variable mass small amplitude linear vibrator, characterized in that: include: An exciter housing (1), wherein the front side of the exciter housing (1) is arranged to be open; An N-shaped steel rail (10), the N-shaped steel rail (10) being vertically fixedly connected to the opening on the front side of the vibration exciter housing (1); A counterweight assembly, the counterweight assembly being vertically slidably connected to the N-shaped steel rail (10); A connecting rod mechanism, wherein the connecting rod mechanism is installed in the vibration exciter housing (1); A quick installation and disassembly mechanism (14), wherein the quick installation and disassembly mechanism (14) is installed on the connecting rod mechanism, a horizontal slide groove is provided on the counterweight assembly, and an output end of the quick installation and disassembly mechanism (14) is slidably connected in the horizontal slide groove; Wherein, the connecting rod mechanism is used to push the quick installation and removal mechanism (14) to reciprocate in the vertical direction.

2. The variable mass small amplitude linear vibrator according to claim 1, characterized in that: The counterweight assembly comprises a counterweight block (11), the counterweight block (11) is slidably connected to the N-shaped steel rail (10), one side of the counterweight block (11) is detachably connected to an additional weight block (9), the other side of the counterweight block (11) is provided with the horizontal slide groove, and the quick installation and removal mechanism (14) is slidably matched with the counterweight block (11) through the horizontal slide groove.

3. The variable mass small amplitude linear vibrator according to claim 1, characterized in that: The connecting rod mechanism comprises a motor (4) fixedly connected to the exciter housing (1); the output shaft of the motor (4) is fixedly connected to an eccentric wheel (6); a rocker (7) is rotatably connected to the eccentric wheel (6); a connecting rod (2) is rotatably connected to the inner wall of the exciter housing (1); one end of the connecting rod (2) is rotatably connected to the rocker (7); and the quick installation and disassembly mechanism (14) is rotatably connected to the rocker (7).

4. The variable mass small amplitude linear vibrator according to claim 3, characterized in that: A fixing seat (5) is fixedly connected to the bottom of the vibration exciter housing (1), and the motor (4) is fixedly connected to the fixing seat (5).

5. The variable mass small amplitude linear vibrator according to claim 3, characterized in that: The output shaft of the motor (4) is fixedly connected to a transmission shaft (13), and the eccentric wheel (6) is fixedly connected to one end of the transmission shaft (13).

6. The variable mass small amplitude linear vibrator according to claim 3, characterized in that: A mounting seat (3) is installed on the inner wall of the vibration exciter housing (1), and the connecting rod (2) is rotatably connected to the mounting seat (3).

7. The variable mass small amplitude linear vibrator according to claim 1, characterized in that: The quick installation and disassembly mechanism (14) comprises a shell (18) and a sliding rod, one end of the sliding rod is slidably matched with the shell (18), and the other end of the sliding rod is slidably connected in the horizontal slide groove, and a quick installation and disassembly component is installed at one end of the sliding rod located in the shell (18), and the sliding rod is detachably connected to the shell (18) through the quick installation and disassembly component.

8. The variable mass small amplitude linear vibrator according to claim 7, characterized in that: The quick installation and disassembly component includes an elastic gasket (15), a mounting groove is provided at the end of the slide rod, the elastic gasket (15) is fixed in the mounting groove, the two ends of the elastic gasket (15) are respectively fixedly connected with elastic column pins (16), the side wall of the mounting groove is symmetrically provided with through holes, the two elastic column pins (16) extend out of the mounting groove through the through holes, the side wall of the shell (18) is symmetrically provided with positioning grooves, the two elastic column pins (16) are respectively limited and matched with the two positioning grooves, a spring (17) is provided between the two elastic column pins (16), and the two ends of the spring (17) are fixedly connected to the ends of the elastic gasket (15).

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