Shock absorption and noise reduction three-phase asynchronous motor

Abstract

The utility model provides a shock absorption and noise reduction three-phase asynchronous motor, which comprises a motor main body and a mounting bottom plate, the bottom of the motor main body is fixedly connected with a butt joint seat, the butt joint seat is disc-shaped, and the disc surface of the butt joint seat is rotatably connected with rotating shafts which are uniformly distributed in the circumferential direction; the rotating shaft penetrates through the butt joint seat, an eccentric shaft is fixedly connected to the bottom of the rotating shaft, an annular connecting disc is fixedly connected to the upper portion of the mounting bottom plate, a damping rubber sleeve is arranged in the annular connecting disc in a sleeved mode, and the inner circumferential wall of the damping rubber sleeve is used in cooperation with the outer circumferential wall of the eccentric shaft. By arranging the annular connecting disc, the damping rubber sleeve, the rotating shaft and the eccentric shaft, the combined structure that the butt joint seat and the annular connecting disc carry out damping and noise reduction through the damping rubber sleeve has the advantages of being more labor-saving and rapid to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of motor bases, in particular to a three-phase asynchronous motor with vibration reduction and noise reduction. Background Art

[0002] Existing electric motors are usually fixed directly on a work surface when in use. The motor will vibrate when working, and the bottom of the motor will directly collide with the connected work surface. The bottom of the motor and the work surface are generally metal structures. The direct collision between the two will produce a lot of noise, and the energy generated after the collision will continue to act on the internal components of the motor, causing the internal components of the motor to be easily damaged, which is not conducive to the use of the motor.

[0003] To this end, the utility model with publication number CN219875330U proposes a three-phase asynchronous motor with vibration reduction and noise reduction, including a main body, a connecting mechanism installed at the bottom of the main body, a vibration reduction mechanism installed at the bottom of the connecting mechanism, a fixing mechanism installed at the bottom of the vibration reduction mechanism, the connecting mechanism including a connecting plate, the bottom of the main body is fixedly connected to the top of the connecting plate, the lower surface of the connecting plate is provided with a first card slot, the number of the first card slots is multiple, the vibration reduction mechanism includes a rubber plate, the upper surface of the rubber plate is fixedly connected with a first rubber strip, the number of the first rubber strips is multiple, and the multiple first rubber strips are respectively located inside the multiple first card slots. The vibration reduction and noise reduction three-phase asynchronous motor provided by the present application can reduce the vibration amplitude between the bottom of the motor and the work surface when the motor vibrates during use, and can absorb part of the energy generated during vibration, thereby reducing the noise generated when the motor is working.

[0004] However, the above-mentioned prior art still has shortcomings in specific implementation: the first rubber strip and the second rubber strip are arranged on the front and back sides of the rubber plate respectively, and then the first rubber strip is connected to the first slot at the bottom of the connecting plate, and the second rubber strip is connected to the second slot at the top of the bottom plate. In order to improve the shock absorption performance, the rubber strip and the slot must be connected in an interference fit manner. However, the number of rubber strips is large, which increases the difficulty of assembly and has the defect of low assembly efficiency.

[0005] To this end, the utility model provides a three-phase asynchronous motor with vibration reduction and noise reduction. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a three-phase asynchronous motor with vibration reduction and noise reduction to solve the problems raised in the above-mentioned background technology. The base part of the utility model for supporting the motor theme has the advantage of more convenient and quick assembly.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a shock-absorbing and noise-reducing three-phase asynchronous motor, including a motor body and a mounting base plate, the bottom of the motor body is fixedly connected to a docking seat, the docking seat is disc-shaped and has a circumferentially evenly distributed rotating shaft rotatably connected on its disk surface, the rotating shaft is arranged to penetrate the docking seat and has an eccentric shaft fixedly connected to its bottom, an annular connecting plate is fixedly connected to the top of the mounting base plate, a shock-absorbing rubber sleeve is provided inside the annular connecting plate, the inner peripheral wall of the shock-absorbing rubber sleeve and the outer peripheral wall of the eccentric shaft are used in combination, the top of the shock-absorbing rubber sleeve is fixedly connected to an upper annular rubber pad that contacts the bottom and the annular connecting plate, and bolt connection holes close to the outer periphery are provided on the disk surfaces of the annular connecting plate and the docking seat.

[0008] Furthermore, a coaxial truncated cone is welded to the bottom of the docking seat, the diameter of the small end of the truncated cone is smaller than the inner hole diameter of the shock-absorbing rubber sleeve, and the diameter of the large end is larger than the inner hole diameter of the shock-absorbing rubber sleeve.

[0009] Furthermore, the inner circumferential wall of the annular connecting plate is provided with arcuate grooves evenly distributed in the circumferential direction, the number of the arcuate grooves is the same as the number of the rotating shafts, and the shock-absorbing rubber sleeve is provided with an arcuate inner concave portion sunk into the arcuate grooves.

[0010] Furthermore, a plurality of resistance-increasing strips which are evenly spaced in the circumferential direction are welded on the peripheral wall of the eccentric shaft away from the axis of the rotating shaft.

[0011] Furthermore, a wedge-shaped pressure block is welded to the bottom of the eccentric shaft, and a lower annular rubber pad whose upper end face contacts the lower surface of the annular connecting plate is fixedly connected to the bottom of the shock-absorbing rubber sleeve. When the resistance-increasing strip is located in the arc-shaped inner recessed portion, the inclined surface on the wedge-shaped pressure block squeezes the lower end face of the lower annular rubber pad.

[0012] Furthermore, a pillar is welded to the upper end surface of the installation base plate, which is welded to the top and the lower plate surface of the annular connecting plate. The upper end surface of the installation base plate is also penetrated by a recess located below the docking seat.

[0013] Furthermore, a shift plate is welded on the top of the rotating shaft.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model provides an annular connecting plate, a shock-absorbing rubber sleeve, a rotating shaft and an eccentric shaft, so that the combined structure of the docking seat and the annular connecting plate is shock-absorbing and noise-reducing through the shock-absorbing rubber sleeve, which has the advantages of easier and faster assembly.

[0016] 2. The utility model opens a plurality of circumferentially distributed arc grooves in the annular connecting plate, and then arranges an arc-shaped inner concave portion sunk into the arc-shaped groove on the shock-absorbing rubber sleeve. When the rotating shaft rotates until the eccentric shaft enters the arc-shaped inner concave portion, the extrusion area of ​​the contact between the eccentric shaft and the shock-absorbing rubber sleeve can be increased. This arrangement can greatly improve the strength of shock absorption and can effectively avoid the problem of high-frequency jitter of the docking seat relative to the annular connecting plate.

[0017] 3. The docking seat provided in the utility model is disc-shaped, the annular connecting plate is ring-shaped, and the shock-absorbing rubber sleeve is round. Therefore, after the mounting base is fixedly installed, the direction of the output shaft of the motor body can be easily adjusted, thereby improving the applicable range of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a three-phase asynchronous motor with vibration reduction and noise reduction according to the utility model;

[0019] Figure 2 It is a cross-sectional schematic diagram of the bottom of a three-phase asynchronous motor with vibration reduction and noise reduction according to the utility model;

[0020] Figure 3 It is a schematic diagram of a three-phase asynchronous motor with vibration reduction and noise reduction after explosion expansion according to the utility model;

[0021] Figure 4 for Figure 3 The enlarged schematic diagram of the part "a" in the middle;

[0022] Figure 5 It is a schematic diagram of a frustum of a vibration-reducing and noise-reducing three-phase asynchronous motor of the utility model;

[0023] In the figure: 1. motor body; 11. docking seat; 111. frustum; 2. mounting base; 21. annular connecting plate; 211. arc-shaped groove; 22. support; 23. clearance gap; 3. rotating shaft; 31. dial plate; 4. eccentric shaft; 41. resistance-increasing strip; 42. wedge-shaped pressure block; 5. shock-absorbing rubber sleeve; 51. upper annular rubber pad; 52. arc-shaped inner concave portion; 53. lower annular rubber pad; 6. bolt connection hole. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] See also Figures 1 to 5The utility model provides a technical solution: a three-phase asynchronous motor with vibration reduction and noise reduction, including a motor body 1 and a mounting base plate 2, a docking seat 11 is fixedly connected to the bottom of the motor body 1, the docking seat 11 is disc-shaped and a rotating shaft 3 evenly distributed in the circumferential direction is rotatably connected on its disc surface, wherein the rotating shaft 3 is a T-shaped mechanism as a whole, the rotating shaft 3 is arranged to pass through the docking seat 11 and an eccentric shaft 4 is fixedly connected to its bottom, in specific implementation, a through hole can be opened on the disc surface of the docking seat 11, the outer diameter of the rotating shaft 3 is the same as the inner diameter of the through hole, the outer diameter of the eccentric shaft 4 is larger than the outer diameter of the rotating shaft 3 located in the through hole, when the rotating shaft 3 is controlled to rotate, the eccentric shaft 4 will follow the rotation, and its eccentric position will change at the same time.

[0026] An annular connecting plate 21 is fixedly connected above the mounting base plate 2. Specifically, a pillar 22 is welded to the top of the upper end surface of the mounting base plate 2 and is welded to the lower disk surface of the annular connecting plate 21. There are multiple pillars 22 and they are evenly distributed circumferentially relative to the annular connecting plate 21. The upper end surface of the mounting base plate 2 is also penetrated by a clearance notch 23 located below the docking seat 11. The function of the clearance notch 23 is to reduce the contact area between the mounting base plate 2 and the mounting surface. The inner sleeve of the annular connecting plate 21 is provided with a shock-absorbing rubber sleeve 5, and the inner circumferential wall of the shock-absorbing rubber sleeve 5 and the inner circumferential wall of the annular connecting plate 21 are interference fit, and the inner circumferential wall of the shock-absorbing rubber sleeve 5 and the outer circumferential wall of the eccentric shaft 4 are used in cooperation. Specifically, when the eccentric direction of the eccentric shaft 4 is close to the axis of the docking seat 11, the evenly distributed eccentric shafts 4 can be easily inserted into the shock-absorbing rubber sleeve 5 at the same time, and then when the rotating shaft 3 is controlled to rotate 180°, the eccentric shaft 4 will squeeze the shock-absorbing rubber sleeve 5, and the squeezed shock-absorbing rubber sleeve 5 can play a role in shock-absorbing the docking seat 11 in any horizontal direction.

[0027] Furthermore, an upper annular rubber pad 51 is fixedly connected to the top of the shock-absorbing rubber sleeve 5, and the bottom is in contact with the annular connecting plate 21. The docking seat 11 will squeeze the upper annular rubber pad 51 under the action of gravity. The upper annular rubber pad 51 plays a role in up and down shock absorption of the docking seat 11. The annular connecting plate 21 and the docking seat 11 are both provided with bolt connection holes 6 close to the outer periphery on the disk surface. The annular connecting plate 21 and the docking seat 11 can be fastened and connected by bolts through the bolt connection holes 6. It should be noted that when using bolt connection, it is necessary to insert the rubber pad into the screw to avoid hard contact between the bolt and the docking seat 11 and the annular connecting plate 21.

[0028] In this embodiment, a coaxial truncated cone 111 is welded to the bottom of the docking seat 11. The diameter of the small end of the truncated cone 111 is smaller than the inner diameter of the shock-absorbing rubber sleeve 5, and the diameter of the large end is larger than the inner diameter of the shock-absorbing rubber sleeve 5. The function of the truncated cone 111 is to make the upper edge of the shock-absorbing rubber sleeve 5 uniformly compressed, further improving the effect of shock absorption and noise reduction. It should be noted that the outer cone wall of the truncated cone 111 is provided with a clearance gap adapted to the eccentric shaft 4.

[0029] Furthermore, the inner circumferential wall of the annular adapter plate 21 is provided with arc grooves 211 evenly distributed in the circumferential direction, and the number of the arc grooves 211 is the same as the number of the rotating shaft 3. The shock-absorbing rubber sleeve 5 is provided with an arc-shaped inner concave portion 52 sunken into the arc groove 211, and the arc-shaped inner concave portion 52 is an integrated structure on the shock-absorbing rubber sleeve 5. When in use, the concave surfaces of the eccentric shaft 4 and the arc-shaped inner concave portion 52 are opposite, and the arc-shaped inner concave portion 52 will be squeezed when the eccentric shaft 4 rotates. This arrangement can increase the contact area between the eccentric shaft 4 and the shock-absorbing rubber sleeve 5, and can also effectively prevent the docking seat 11 from twisting relative to the annular adapter plate 21. Among them, the circumferential wall of the eccentric shaft 4 away from the axis of the rotating shaft 3 is welded with a plurality of circumferentially evenly spaced resistance-increasing strips 41, which play a role in preventing vibration and loosening.

[0030] In this embodiment, a wedge-shaped pressure block 42 is welded to the bottom of the eccentric shaft 4, and a lower annular rubber pad 53 whose upper end face contacts the lower surface of the annular connecting plate 21 is fixedly connected to the bottom of the shock-absorbing rubber sleeve 5. When the resistance-increasing strip 41 is located in the arc-shaped inner recess 52, the inclined surface on the wedge-shaped pressure block 42 squeezes the lower end face of the lower annular rubber pad 53. This setting can effectively prevent the eccentric shaft 4 from falling off relative to the annular connecting plate 21. That is to say, when the bolt in the bolt connection hole 6 is loosened, the wedge-shaped pressure block 42 can prevent the docking seat 11 from loosening relative to the annular connecting plate 21, and does not affect the connection relationship between the docking seat 11 and the annular connecting plate 21.

[0031] In this embodiment, a shift plate 31 is welded on the top of the rotating shaft 3, and the shift plate 31 is a wrench docking plate, that is, the rotating shaft 3 can be easily driven to rotate by clamping the shift plate 31 with a wrench and then swinging the wrench.

[0032] Working principle: Before assembly, manually rotate the shaft 3 through the dial plate 31 to make the eccentric shaft 4 eccentric to the axial direction of the docking seat 11, and then hang the motor body 1 as a whole so that the inner cavity of the frustum 111 and the annular connecting plate 21 are opposite to each other. At this time, the eccentric shaft 4 evenly distributed in the circumference can easily enter the shock-absorbing rubber sleeve 5 and is in a clearance fit state with the arc-shaped inner recess 52. When the annular rubber pad 51 is squeezed on the docking seat 11, use a wrench to twist the shaft 3 through the dial plate 31. The eccentric shaft 4 will squeeze the arc-shaped inner recess 52. The squeezed shock-absorbing rubber sleeve 5 between the docking seat 11 and the annular connecting plate 21 plays a role in shock absorption and noise reduction. Finally, the docking seat 11 and the annular connecting plate 21 are fastened and connected by bolts through the bolt connection holes 6.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A three-phase asynchronous motor with vibration reduction and noise reduction, comprising a motor body (1) and a mounting base plate (2), wherein a docking seat (11) is fixedly connected to the bottom of the motor body (1), characterized in that: The docking seat (11) is in the shape of a disk and is rotatably connected to a rotating shaft (3) evenly distributed in the circumferential direction on its disk surface. The rotating shaft (3) is arranged to penetrate the docking seat (11) and is fixedly connected to an eccentric shaft (4) at its bottom. An annular connecting plate (21) is fixedly connected to the top of the mounting base plate (2). A shock-absorbing rubber sleeve (5) is sleeved inside the annular connecting plate (21). The inner peripheral wall of the shock-absorbing rubber sleeve (5) and the outer peripheral wall of the eccentric shaft (4) are used in conjunction with each other. The top of the shock-absorbing rubber sleeve (5) is fixedly connected to an upper annular rubber pad (51) whose bottom contacts the annular connecting plate (21). Bolt connection holes (6) close to the outer periphery are provided on the disk surfaces of the annular connecting plate (21) and the docking seat (11).

2. A vibration-reducing and noise-reducing three-phase asynchronous motor according to claim 1, characterized in that: A coaxial truncated cone (111) is welded to the bottom of the docking seat (11), the diameter of the small end of the truncated cone (111) is smaller than the inner hole diameter of the shock-absorbing rubber sleeve (5), and the diameter of the large end of the truncated cone (111) is larger than the inner hole diameter of the shock-absorbing rubber sleeve (5).

3. A vibration-reducing and noise-reducing three-phase asynchronous motor according to claim 2, characterized in that: The inner circumferential wall of the annular connecting plate (21) is provided with arc-shaped grooves (211) evenly distributed in the circumferential direction, the number of the arc-shaped grooves (211) being the same as the number of the rotating shaft (3), and the shock-absorbing rubber sleeve (5) is provided with an arc-shaped inner concave portion (52) sunk into the arc-shaped grooves (211).

4. A vibration-reducing and noise-reducing three-phase asynchronous motor according to claim 3, characterized in that: A plurality of resistance-increasing strips (41) distributed at equal intervals in the circumferential direction are welded to the peripheral wall of the eccentric shaft (4) away from the axis of the rotating shaft (3).

5. A vibration-reducing and noise-reducing three-phase asynchronous motor according to claim 4, characterized in that: A wedge-shaped pressure block (42) is welded to the bottom of the eccentric shaft (4), and a lower annular rubber pad (53) whose upper end surface contacts the lower surface of the annular connecting plate (21) is fixedly connected to the bottom of the shock-absorbing rubber sleeve (5); when the resistance-increasing strip (41) is located in the arc-shaped inner concave portion (52), the inclined surface on the wedge-shaped pressure block (42) presses the lower end surface of the lower annular rubber pad (53).

6. The vibration-reducing and noise-reducing three-phase asynchronous motor according to claim 1, characterized in that: The upper end surface of the installation base plate (2) is welded with a support (22) which is welded to the top and the lower plate surface of the annular connecting plate (21). The upper end surface of the installation base plate (2) is also penetrated by a recess (23) located below the docking seat (11).

7. The vibration-reducing and noise-reducing three-phase asynchronous motor according to claim 1, characterized in that: A shift plate (31) is welded to the top of the rotating shaft (3).

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