Plug-in vibrator with built-in permanent magnet synchronous motor

Abstract

The invention relates to the technical field of vibrators, in particular to a plug-in vibrator with a built-in permanent magnet synchronous motor, which comprises a shell, an anti-vibration insulation sealing plug is fixedly mounted in the middle of the inner wall of the shell, the permanent magnet synchronous motor is arranged on one side of the anti-vibration insulation sealing plug, and the end part of the permanent magnet synchronous motor is electrically connected with three motor outgoing lines. The other side of the anti-vibration insulation sealing plug is provided with a positioning mechanism used for protecting the three motor outgoing lines. The extension ends of the two electric push rods are controlled to be shrunk from the longest state to the shortest state, silicone oil is extruded out of the through hole through the piston to fill the space between the first rubber plate and the second rubber plate, and redundant silicone oil is injected into the wire inlet box. The motor leading-out wire in the wire inlet box and the space among the second positioning hole, the first rubber plate and the second rubber plate are soaked, so that a thicker silicone oil film is formed on the surface of the motor leading-out wire, friction is reduced, when the silicone oil layer is thicker, external impact force can be buffered, and the motor leading-out wire is prevented from being damaged due to strenuous vibration or extrusion.

Description

Technical Field

[0001] The present invention relates to the technical field of vibrators, in particular to a plug-in vibrator with a built-in permanent magnet synchronous motor. Background Art

[0002] The plug-in type internal permanent magnet synchronous motor vibrator is a device that combines internal permanent magnet synchronous motor technology with plug-in vibrator design. It is mainly used in fields such as concrete vibrating construction. The motor drives the vibrating rod to generate high-frequency vibration, which transmits the vibration energy to the interior of the concrete through the vibrating rod, eliminating bubbles and improving the density of the concrete.

[0003] Existing vibrators use three sets of bearings to support the operation of a motor shaft. During operation, it is difficult to ensure that the center lines of the three sets of bearings are in a straight line, which will cause most products to operate abnormally. At the same time, the vibration generated by the vibrator during operation will cause friction between the insulation of the motor lead wire and the inside of the metal hole. Once the motor lead wire is worn, it will cause a short circuit, causing abnormal motor operation and increasing the possibility of electric shock to the operator. Summary of the Invention

[0004] The technical problems solved by this solution are:

[0005] (1) How to solve the problem that the vibration generated by the vibrator during operation will cause friction between the insulation of the motor lead wire and the inner side of the metal hole, which will cause a short circuit after being worn out, causing abnormal operation of the motor and increasing the risk of electric shock to the operator;

[0006] (2) How to solve the problem that the existing vibrator uses three sets of bearings to support the rotation shaft of a motor. During operation, it is difficult to ensure that the center lines of the three sets of bearings are in a straight line, causing most products to operate abnormally.

[0007] The object of the present invention can be achieved by the following technical solution: a plug-in vibrator with a built-in permanent magnet synchronous motor, comprising a housing, a vibration-proof insulating sealing plug fixedly installed in the middle of the inner wall of the housing, a permanent magnet synchronous motor is provided on one side of the vibration-proof insulating sealing plug, three motor lead wires are electrically connected to the end of the permanent magnet synchronous motor, a positioning mechanism for protecting the three motor lead wires is provided on the other side of the vibration-proof insulating sealing plug, and a rear plug is fixedly installed on one end of the housing;

[0008] The positioning mechanism includes a first rubber plate and a second rubber plate fixedly connected to the inner wall of the rear plug. The second rubber plate is arranged close to the vibration-proof insulating sealing plug. A wire box for placing three motor lead wires is fixedly inserted in the middle of the first rubber plate.

[0009] A further technical improvement of the present invention is that the incoming wire box is arranged horizontally, and three first positioning holes for positioning the motor lead wires are opened on the inner wall of the incoming wire box, and the inner diameter of the first positioning holes is the same as the diameter of the motor lead wires.

[0010] A further technical improvement of the present invention is that three second positioning holes for positioning the motor lead wires are formed on the second rubber plate, and the inner diameter of the second positioning holes is larger than the diameter of the motor lead wires.

[0011] A further technical improvement of the present invention is that: an oil storage cylinder is fixedly inserted into the first rubber plates on the upper and lower sides of the incoming wire box, and the oil storage cylinder is filled with silicone oil for protecting the motor lead wires, and a through hole is opened on the side of the oil storage cylinder facing the incoming wire box, and the through hole is located between the first rubber plate and the second rubber plate.

[0012] A further technical improvement of the present invention is that a shock-absorbing block is provided between the second rubber plate and the anti-vibration insulating sealing plug, and three channels for protecting the motor lead wires are opened inside the shock-absorbing block, and the positions of the three channels correspond to the positions of the three second positioning holes respectively; by controlling the extended ends of the two electric push rods to shrink from the longest to the shortest in sequence, the silicone oil in the oil storage cylinder is squeezed out from the through hole through the piston to fill the space between the first rubber plate and the second rubber plate, and the excess silicone oil will also be injected into the wire box to soak the second positioning holes, the space between the first rubber plate and the second rubber plate, and the motor lead wires in the wire box. , so that a thicker silicone oil film is formed on the surface of the motor lead wire, reducing direct friction with the contact object, and when the silicone oil layer is thicker, it can buffer external impact force and prevent the motor lead wire from being damaged due to severe vibration or extrusion. When the vibrator is not working, first place the shell vertically. At this time, the front plug is set downward, and the extended ends of the two electric push rods are controlled to retract and reset in sequence. The two pistons are moved and reset to reduce the air pressure in the corresponding oil storage cylinder, making it easier to absorb the silicone oil soaked in the motor lead wire through the through hole, avoiding excessive silicone oil from penetrating into the insulation layer of the motor lead wire, causing aging and cracking of the insulation material, and affecting the insulation effect of the motor lead wire.

[0013] A further technical improvement of the present invention is that two laterally arranged electric push rods are fixedly installed inside the shock-absorbing block, and the two electric push rods are arranged up and down. One end of the oil storage cylinder is fixedly passed through the second rubber plate, and the protruding ends of the two electric push rods are respectively movable through the corresponding oil storage cylinders, and the protruding ends of the two electric push rods are fixedly installed with pistons.

[0014] A further technical improvement of the present invention is that a first rolling bearing and a second rolling bearing are fixedly provided on the inner wall of the shell, the first rolling bearing is provided close to the front plug, and the second rolling bearing is provided close to the permanent magnet synchronous motor.

[0015] The further technical improvement of the present invention is that: the output end of the permanent magnet synchronous motor is fixedly connected to the motor shaft, an eccentric block is fixedly installed in the middle of the motor shaft, and the end of the motor shaft away from the permanent magnet synchronous motor is fixedly passed through the inner ring of the first rolling bearing and the second rolling bearing; power is provided by a permanent magnet synchronous motor with higher energy density, which reduces the volume of the existing motor while meeting the power requirements of the vibrator, and creates the necessary conditions for the motor shaft part to be in a cantilever state, and supports a motor shaft through two support points of the first rolling bearing and the second rolling bearing, ensuring that the center lines of the first rolling bearing and the second rolling bearing are in a straight line, reducing the processing precision requirements and the assembly difficulty of the product, and at the same time providing a larger space for the motor lead wires, making it convenient for the motor lead wires to be led out of the shell to power the permanent magnet synchronous motor.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the present invention is in use, by controlling the extended ends of the two electric push rods to shrink from the longest to the shortest in sequence, the silicone oil in the oil storage cylinder is squeezed out from the through hole through the piston and fills the space between the first rubber plate and the second rubber plate. The excess silicone oil will also be injected into the wire-in box, soaking the second positioning hole, the space between the first rubber plate and the second rubber plate, and the motor lead wire in the wire-in box, so that a thicker silicone oil film is formed on the surface of the motor lead wire, reducing direct friction with the contact object. When the silicone oil layer is thicker, it can buffer external impact force and prevent the motor lead wire from being damaged by severe vibration or extrusion. When the vibrator is not working, the shell is first placed vertically. At this time, the front plug is set downward, and the extended ends of the two electric push rods are controlled to shrink and reset in sequence. The two pistons move and reset to reduce the air pressure in the corresponding oil storage cylinder, so that the silicone oil soaked in the motor lead wire is absorbed through the through hole, avoiding excessive silicone oil from penetrating into the insulation layer of the motor lead wire, causing aging and cracking of the insulation material, and affecting the insulation effect of the motor lead wire.

[0018] When in use, the present invention provides power through a permanent magnet synchronous motor with a relatively high energy density, thereby reducing the volume of the existing motor while meeting the power requirements of the vibrator, and creating the necessary conditions for the motor shaft portion to be in a cantilever state. A motor shaft is supported by two supporting points, the first rolling bearing and the second rolling bearing, thereby ensuring that the center lines of the first rolling bearing and the second rolling bearing are in a straight line, reducing the processing precision requirements and the assembly difficulty of the product, and at the same time providing a larger space for the motor lead wires, making it easier for the motor lead wires to be led out of the housing to power the permanent magnet synchronous motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the overall internal structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified view of the structure at center A;

[0023] Figure 4 It is a three-dimensional schematic diagram of the local structure of the positioning mechanism of the present invention;

[0024] Figure 5 This is a cross-sectional view of the internal structure of the oil storage cylinder of the present invention;

[0025] Figure 6 It is a schematic structural perspective view of the shock absorbing block of the present invention.

[0026] In the figure: 1. Front plug; 2. Housing; 3. Rear plug; 4. Motor lead wire; 5. First rolling bearing; 6. Eccentric block; 7. Permanent magnet synchronous motor; 8. Vibration-proof insulating sealing plug; 9. Positioning mechanism; 10. Second rolling bearing; 11. Motor shaft; 12. End cover; 901. Wire entry box; 902. First rubber sheet; 903. Shock absorber; 904. Oil storage cylinder; 905. First positioning hole; 906. Second rubber sheet; 907. Electric push rod; 908. Second positioning hole; 909. Piston; 910. Through hole; 911. Channel. DETAILED DESCRIPTION

[0027] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1-6 As shown, a plug-in vibrator with a built-in permanent magnet synchronous motor includes a shell 2, an anti-vibration insulating sealing plug 8 is fixedly installed in the middle of the inner wall of the shell 2, a permanent magnet synchronous motor 7 is provided on one side of the anti-vibration insulating sealing plug 8, and the end of the permanent magnet synchronous motor 7 is electrically connected to three motor lead wires 4. A positioning mechanism 9 for protecting the three motor lead wires 4 is provided on the other side of the anti-vibration insulating sealing plug 8, and a rear plug 3 is fixedly installed at one end of the shell 2.

[0029] See also Figure 2As shown, the above-mentioned positioning mechanism 9 includes a first rubber plate 902 and a second rubber plate 906 fixedly connected to the inner wall of the rear plug 3, the second rubber plate 906 is arranged close to the vibration-proof insulating sealing plug 8, and a wire entry box 901 for placing three motor lead wires 4 is fixedly inserted in the middle of the first rubber plate 902.

[0030] See also Figure 3 and Figure 4 As shown, the above-mentioned incoming box 901 is arranged horizontally, and three first positioning holes 905 for positioning the motor lead wires 4 are opened on the inner wall of the incoming box 901. The inner diameter of the first positioning hole 905 is the same as the diameter of the motor lead wires 4.

[0031] See also Figure 4 As shown, the second rubber plate 906 is provided with three second positioning holes 908 for positioning the motor lead wires 4 , and the inner diameter of the second positioning holes 908 is larger than the diameter of the motor lead wires 4 .

[0032] See also Figure 3 and Figure 5 As shown, an oil storage cylinder 904 is fixedly inserted on the first rubber plates 902 on the upper and lower sides of the above-mentioned incoming box 901. The oil storage cylinder 904 is filled with silicone oil for protecting the motor lead wire 4, and the oil storage cylinder 904 is provided with a through hole 910 on the side facing the incoming box 901. The through hole 910 is located between the first rubber plate 902 and the second rubber plate 906.

[0033] See also Figure 3 、 Figure 4 and Figure 6As shown, a shock absorbing block 903 is provided between the second rubber plate 906 and the anti-vibration insulating sealing plug 8. Three channels 911 for protecting the motor lead wire 4 are provided inside the shock absorbing block 903. The positions of the three channels 911 correspond to the positions of the three second positioning holes 908 respectively. By controlling the extended ends of the two electric push rods 907 to shrink from the longest to the shortest in sequence, the silicone oil in the oil storage cylinder 904 is squeezed out from the through hole 910 through the piston 909 to fill the space between the first rubber plate 902 and the second rubber plate 906. The excess silicone oil will also be injected into the incoming box 901, so as to fill the second positioning holes 908, the space between the first rubber plate 902 and the second rubber plate 906, and the space in the incoming box 901. The motor lead wire 4 is soaked so that a thicker silicone oil film is formed on the surface of the motor lead wire 4, reducing direct friction with the contact object. When the silicone oil layer is thicker, it can buffer external impact force and prevent the motor lead wire 4 from being damaged by severe vibration or extrusion. When the vibrator is not working, the shell 2 is first placed vertically. At this time, the front plug 1 is set downward, and the extended ends of the two electric push rods 907 are controlled to retract and reset in turn. The two pistons 909 are moved and reset to reduce the air pressure in the corresponding oil storage cylinder 904, so that the silicone oil soaked in the motor lead wire 4 is absorbed through the through hole 910, avoiding excessive silicone oil from penetrating into the insulation layer of the motor lead wire 4, causing aging and cracking of the insulating material, and affecting the insulation effect of the motor lead wire 4.

[0034] See also Figure 4-Figure 6 As shown, two laterally arranged electric push rods 907 are fixedly installed inside the above-mentioned shock-absorbing block 903. The two electric push rods 907 are arranged up and down. One end of the oil storage cylinder 904 is fixedly passed through the second rubber plate 906. The protruding ends of the two electric push rods 907 are respectively movable and pass through the corresponding oil storage cylinders 904, and the protruding ends of the two electric push rods 907 are fixedly installed with pistons 909.

[0035] See also Figure 2 and Figure 3 As shown, an end cover 12 is provided between the above-mentioned shock-absorbing block 903 and the anti-vibration insulating sealing plug 8 .

[0036] See also Figure 2 As shown, a first rolling bearing 5 and a second rolling bearing 10 are fixedly provided on the inner wall of the housing 2 . The first rolling bearing 5 is provided close to the front plug 1 , and the second rolling bearing 10 is provided close to the permanent magnet synchronous motor 7 .

[0037] See also Figure 2As shown, the output end of the above-mentioned permanent magnet synchronous motor 7 is fixedly connected to the motor shaft 11, and an eccentric block 6 is fixedly installed in the middle of the motor shaft 11, and the end of the motor shaft 11 away from the permanent magnet synchronous motor 7 is fixedly passed through the inner ring of the first rolling bearing 5 and the second rolling bearing 10; the power is provided by the permanent magnet synchronous motor 7 with higher energy density, and the volume of the existing motor is reduced while meeting the power requirements of the vibrator, and the necessary conditions are created for the motor shaft 11 to be in a cantilever state. The motor shaft 11 is supported by two supporting points of the first rolling bearing 5 and the second rolling bearing 10, which ensures that the center lines of the first rolling bearing 5 and the second rolling bearing 10 are in a straight line, reduces the processing precision requirements, and reduces the assembly difficulty of the product. At the same time, it provides a larger space for the motor lead wire 4, which facilitates the motor lead wire 4 to be led out of the shell 2 to power the permanent magnet synchronous motor 7.

[0038] See also Figure 2 and Figure 3 As shown, the front plug 1 is fixedly installed on the end of the above-mentioned shell 2 away from the rear plug 3, and the end of the rear plug 3 away from the shell 2 is provided with entry and exit holes for guiding three motor lead wires 4, and the end of the entry and exit holes close to the vibration-proof insulating sealing plug 8 corresponds to the position of the incoming box 901.

[0039] Working principle: When the present invention is in use, first, before the vibrator works, the protruding ends of the two electric push rods 907 are controlled to shrink from the longest to the shortest in turn, so that the silicone oil in the oil storage cylinder 904 is squeezed out from the through hole 910 through the piston 909 and fills the space between the first rubber plate 902 and the second rubber plate 906. The excess silicone oil will also be injected into the incoming box 901 to soak the second positioning hole 908, the space between the first rubber plate 902 and the second rubber plate 906 and the motor lead wire 4 in the incoming box 901, so that a thicker silicone oil film is formed on the surface of the motor lead wire 4, reducing direct friction with the contact object. When the silicone oil layer is thicker, it can buffer external impact force and prevent the motor lead wire 4 from being damaged by severe vibration or extrusion. When the vibrator is not working, the shell 2 is first placed vertically. At this time, the front plug 1 is set downward, and the protruding ends of the two electric push rods 907 are controlled to shrink and reset in turn. The two pistons 909 move and reset to reduce the corresponding oil storage cylinder 904. The air pressure is high, which makes it easy to absorb the silicone oil soaked in the motor lead wire 4 through the through hole 910, avoiding excessive silicone oil from penetrating into the insulation layer of the motor lead wire 4, causing aging and cracking of the insulating material, and affecting the insulation effect of the motor lead wire 4; after absorbing the excess silicone oil, the shell 2 is turned for storage so that the front plug 1 is set upward to prevent the silicone oil from leaking from the through hole 910; the power is provided by the permanent magnet synchronous motor 7 with higher energy density, which reduces the volume of the existing motor while meeting the power requirements of the vibrator, and creates the necessary conditions for the motor shaft 11 to be in a cantilever state, and supports a motor shaft 11 through two support points, the first rolling bearing 5 and the second rolling bearing 10, ensuring that the center lines of the first rolling bearing 5 and the second rolling bearing 10 are in a straight line, reducing the processing precision requirements and the assembly difficulty of the product, while providing a larger space for the motor lead wire 4, making it convenient for the motor lead wire 4 to be led out of the shell 2 to power the permanent magnet synchronous motor 7.

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A plug-in vibrator with a built-in permanent magnet synchronous motor, comprising a housing (2), a vibration-proof insulating sealing plug (8) fixedly mounted on the middle portion of the inner wall of the housing (2), a permanent magnet synchronous motor (7) disposed on one side of the vibration-proof insulating sealing plug (8), and characterized in that: The end of the permanent magnet synchronous motor (7) is electrically connected to three motor lead wires (4), the other side of the vibration-proof insulating sealing plug (8) is provided with a positioning mechanism (9) for protecting the three motor lead wires (4), and one end of the housing (2) is fixedly mounted with a rear plug (3); The positioning mechanism (9) comprises a first rubber plate (902) and a second rubber plate (906) fixedly connected to the inner wall of the rear plug (3); the second rubber plate (906) is arranged close to the anti-vibration insulating sealing plug (8); and a wire-in box (901) for accommodating three motor lead wires (4) is fixedly inserted in the middle of the first rubber plate (902).

2. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 1, characterized in that: Three first positioning holes (905) for positioning the motor lead wires (4) are provided on the inner side wall of the incoming wire box (901), and the inner diameter of the first positioning holes (905) is the same as the diameter of the motor lead wires (4).

3. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 1, characterized in that: The second rubber plate (906) is provided with three second positioning holes (908) for positioning the motor lead wires (4), and the inner diameter of the second positioning holes (908) is larger than the diameter of the motor lead wires (4).

4. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 1, characterized in that: An oil storage cylinder (904) is fixedly inserted into the first rubber plates (902) on the upper and lower sides of the incoming line box (901), and a through hole (910) is opened on the side of the oil storage cylinder (904) facing the incoming line box (901), and the through hole (910) is located between the first rubber plate (902) and the second rubber plate (906).

5. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 4, characterized in that: A shock absorbing block (903) is provided between the second rubber plate (906) and the anti-vibration insulating sealing plug (8), and three channels (911) for protecting the motor lead wires (4) are provided inside the shock absorbing block (903), and the positions of the three channels (911) respectively correspond to the positions of the three second positioning holes (908).

6. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 5, characterized in that: Two electric push rods (907) are fixedly installed inside the shock absorbing block (903), one end of the oil storage cylinder (904) is fixedly passed through the second rubber plate (906), and the extended ends of the two electric push rods (907) are respectively movable through the corresponding oil storage cylinders (904), and the extended ends of the two electric push rods (907) are fixedly installed with pistons (909).

7. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 1, characterized in that: A first rolling bearing (5) and a second rolling bearing (10) are also fixedly arranged on the inner wall of the housing (2), wherein the first rolling bearing (5) is arranged close to the front plug (1), and the second rolling bearing (10) is arranged close to the permanent magnet synchronous motor (7).

8. The plug-in type internal permanent magnet synchronous motor vibrator according to claim 1, characterized in that: The output end of the permanent magnet synchronous motor (7) is fixedly connected to a motor shaft (11), an eccentric block (6) is fixedly installed in the middle of the motor shaft (11), and one end of the motor shaft (11) away from the permanent magnet synchronous motor (7) is fixedly passed through the inner rings of the first rolling bearing (5) and the second rolling bearing (10).

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