Shock absorption and noise reduction device of electric vacuum pump

Abstract

The utility model relates to the technical field of electric vacuum pumps, in particular to an electric vacuum pump shock absorption and noise reduction device which comprises a machine body, a shock absorption assembly is arranged at the bottom of the inner side of the machine body, a noise reduction assembly is arranged on the outer side of the machine body, and two bin doors are movably connected to the front side of the machine body. The top of the noise reduction assembly is fixedly connected with a vacuum pump through screws, two guide grooves are formed in the bottom face of the inner side of the machine body, according to the improved damping and noise reduction device, noise generated when the vacuum pump works is absorbed through sound insulation cotton on the inner wall of the machine body, and the noise generated by the vacuum pump is preliminarily reduced; and residual noise can be transmitted to the inner wall of the machine body, under the action of the cavity layer, resonance conversion and sound energy consumption can be cut off, and conduction of resonance sound energy is avoided without contact, so that the purpose of noise reduction is achieved, the springback speed and amplitude of the spring are limited through the damping assembly, the spring recovers to be balanced more quickly, and the service life of the machine body is prolonged. And the damping effect can be better through the double damping design.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vacuum pumps, in particular to a vibration and noise reduction device for an electric vacuum pump. Background Art

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to create a vacuum. Generally speaking, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in a closed space. However, when using existing vacuum pumps, the rotation of the internal motor will cause the pump body to vibrate. The violent vibration is often accompanied by noise. Therefore, we have launched an electric vacuum pump vibration reduction and noise reduction device.

[0003] An existing patent (publication number: CN218882461U) discloses a vibration and noise reduction device for an electric vacuum pump. The device comprises a base, a mounting plate disposed above the base, two symmetrical support bases disposed in the middle of the mounting plate, connecting plates disposed on either side of the support bases, and a shaft disposed in the middle of the two connecting plates located on the same side of the mounting plate. A guide groove mates with the shaft at the upper end of the support base. The connecting plate is fixedly connected to a fixing plate above the connecting plate. Four vibration-damping structures arranged in a matrix are disposed between the mounting plate and the fixing plate. This vibration-damping and noise reduction device has a simple structure, is easy to install, and has a good buffering effect. By damping vibrations, it effectively reduces the noise generated by the electric vacuum pump during operation, thereby improving the driving comfort of the vehicle. The existing technology has the following problems: 1. Existing electric vacuum pumps generate loud noise and strong vibrations during use, causing noise pollution; 2. Existing vibration and noise reduction devices for vacuum pumps often use springs to absorb energy to achieve the purpose of vibration reduction for the electric vacuum pump. This single vibration reduction method is not ideal and the vibration reduction effect is unsatisfactory. Summary of the Invention

[0004] The purpose of the utility model is to provide a vibration and noise reduction device for an electric vacuum pump to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a shock-absorbing and noise-reducing device for an electric vacuum pump, comprising a body, a shock-absorbing component provided at the inner bottom of the body, a noise-reduction component provided at the outer side of the body, two compartment doors movably connected to the front side of the body, a vacuum pump fixedly connected to the top of the noise-reduction component by screws, and two guide grooves provided on the inner bottom surface of the body.

[0006] Further preferably, the noise reduction component includes sound insulation cotton fixedly connected to the inner wall of the body and a circular sound insulation strip fixedly connected to the outer side edge of the body, and a protective plate is fixedly connected to the side of the circular sound insulation strip away from the body.

[0007] Further preferably, a cavity layer is provided between the circular sound insulation strip and the protective plate, and a rubber frame is fixedly connected between two adjacent protective plates.

[0008] Further preferably, the shock absorbing assembly includes a spring and a buffer cylinder fixedly connected to the inner walls on both sides of the body, and one end of the spring away from the inner wall of the body is fixedly connected to a connecting plate, and the connecting plate is fixedly connected to one side of the two first hinge seats.

[0009] Further preferably, the middle parts of the two first hinged seats are hinged with connecting rods, the top ends of the connecting rods are hinged to the middle parts of the second hinged seats, and the second hinged seats are fixedly connected to the bottom surface of the supporting plate.

[0010] Further preferably, two mounting plates are fixedly connected to the middle of the bottom surface of the connecting plate, a roller is rotatably connected between the two mounting plates, and the bottom of the roller is rollingly connected to the inside of the guide groove.

[0011] Further preferably, a piston is slidably connected to the interior of the buffer cylinder, an extrusion rod is fixedly connected to one side of the piston, and a temporary storage cylinder is fixedly connected to the top of the buffer cylinder, and the temporary storage cylinder is perpendicular to the buffer cylinder.

[0012] Further preferably, an oil sealing plate is fixedly connected between the inner walls of the temporary storage cylinder, and a plurality of first oil holes and a plurality of second oil holes are respectively opened in the middle of the oil sealing plate, the plurality of first oil holes and the plurality of second oil holes are arranged in a ring shape, and the plurality of first oil holes are located on the outside of the plurality of second oil holes.

[0013] Further preferably, the bottom surface of the oil sealing plate is fixedly connected to the flow limiting cylinder, a third oil hole is opened in the middle of the bottom surface of the flow limiting cylinder, the interior of the flow limiting cylinder is movably connected to the flow limiting bead, and several of the second oil holes are located in the inner circle of the flow limiting cylinder.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In the utility model, the noise generated by the vacuum pump when it is working is absorbed by the sound insulation cotton on the inner wall of the machine, thereby preliminarily reducing the noise generated by the vacuum pump. The remaining noise will be transmitted to the inner wall of the machine. Under the action of the cavity layer, the resonance conversion and consumption of sound energy can be cut off. Without contact, there is no conduction of resonant sound energy, thereby achieving the purpose of noise reduction.

[0016] In the utility model, the connecting plate is pushed to move in the horizontal direction by the second hinge seat, the connecting rod and the first hinge seat. At this time, the roller at the bottom of the connecting plate and the inner bottom of the guide groove are in rolling friction, which further reduces the noise. At the same time, the connecting plate will drive the extrusion rod and the piston to move in the buffer cylinder. When the buffer oil flows back from the temporary storage cylinder, the flow limiting bead blocks the third oil hole. At this time, the buffer oil in the temporary storage cylinder can only flow back into the buffer cylinder through the first oil hole, thereby reducing the speed of resetting the piston and the extrusion rod, thereby limiting the speed of spring rebound, and making the spring restore balance faster. This structure adopts the mutual cooperation between the buffer structure and the spring to achieve the purpose of shock absorption of the vacuum pump in the working state. The double shock absorption design can make the shock absorption effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional three-dimensional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the left-side sectional three-dimensional structure of the utility model;

[0020] Figure 4 For this utility model Figure 3 A in the figure shows the enlarged structural diagram;

[0021] Figure 5 This is a schematic diagram of the front cross-sectional three-dimensional structure of the buffer cylinder of the utility model;

[0022] Figure 6 For this utility model Figure 5 Schematic diagram of the structure at point B in .

[0023] In the figure: 1. Machine body; 2. Shock absorption assembly; 201. Spring; 202. Buffer cylinder; 203. Connecting plate; 204. First hinge seat; 205. Connecting rod; 206. Second hinge seat; 207. Load-bearing plate; 208. Mounting plate; 209. Roller; 2010. Piston; 2011. Extrusion rod; 2012. Temporary storage cylinder; 2013. Oil sealing plate; 2014. First oil hole; 2015. Second oil hole; 2016. Flow limiting cylinder; 2017. Third oil hole; 2018. Flow limiting bead; 3. Noise reduction assembly; 301. Sound insulation cotton; 302. Ring-shaped sound insulation strip; 303. Protective plate; 304. Cavity layer; 305. Rubber frame; 4. Warehouse door; 5. Vacuum pump; 6. Guide groove. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying 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 embodiments described 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 technical personnel in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] See also Figures 1 to 6 The utility model provides a technical solution: a shock absorption and noise reduction device for an electric vacuum pump, comprising a body 1, a shock absorption component 2 is provided at the inner bottom of the body 1, a noise reduction component 3 is provided at the outer side of the body 1, two compartment doors 4 are movably connected to the front side of the body 1, a vacuum pump 5 is fixed to the top of the noise reduction component 3 by screws, and two guide grooves 6 are provided on the inner bottom surface of the body 1.

[0026] In this embodiment, Figure 1 As shown, the noise reduction component 3 includes sound insulation cotton 301 fixedly connected to the inner wall of the body 1 and a circular sound insulation strip 302 fixedly connected to the edge of the outer side of the body 1. The side of the circular sound insulation strip 302 away from the body 1 is fixedly connected to a protective plate 303. A cavity layer 304 is provided between the circular sound insulation strip 302 and the protective plate 303. A rubber frame 305 is fixedly connected between two adjacent protective plates 303. The noise generated by the vacuum pump 5 during operation is absorbed by the sound insulation cotton 301 on the inner wall of the body 1, and the noise generated by the vacuum pump 5 is preliminarily reduced. The remaining noise will be transmitted to the inner wall of the body 1. Under the action of the cavity layer 304, the resonance conversion and consumption of sound energy can be cut off. Without contact, there is no conduction of resonant sound energy, thereby achieving the purpose of noise reduction.

[0027] In this embodiment, Figure 1As shown, the shock absorbing assembly 2 includes a spring 201 and a buffer cylinder 202 fixedly connected to the inner walls on both sides of the body 1, and one end of the spring 201 away from the inner wall of the body 1 is fixedly connected to a connecting plate 203, and the connecting plate 203 is fixedly connected to one side of two first hinge seats 204. The middle parts of the two first hinge seats 204 are hinged with connecting rods 205, and the top ends of the connecting rods 205 are hinged to the middle parts of the second hinge seats 206. The second hinge seats 206 are fixedly connected to the bottom surface of the bearing plate 207, and two mounting plates 208 are fixedly connected to the middle part of the bottom surface of the connecting plate 203. A roller 209 is rotatably connected between the two mounting plates 208, and the bottom of the roller 209 is rollingly connected to the inside of the guide groove 6. The inside of the buffer cylinder 202 is slidably connected to a piston 2010, and one side of the piston 2010 is fixedly connected to an extruder The pressure rod 2011 and the top of the buffer cylinder 202 are fixedly connected with a temporary storage cylinder 2012, which is perpendicular to the buffer cylinder 202. An oil sealing plate 2013 is fixedly connected between the inner walls of the temporary storage cylinder 2012. A plurality of first oil holes 2014 and a plurality of second oil holes 2015 are respectively opened in the middle of the oil sealing plate 2013. The plurality of first oil holes 2014 and the plurality of second oil holes 2015 are all arranged in a ring, and the plurality of first oil holes 2014 are located on the outside of the plurality of second oil holes 2015. The bottom surface of the oil sealing plate 2013 is fixedly connected to the limiting flow cylinder 2016. The middle part of the bottom surface of the limiting flow cylinder 2016 is provided with a third oil hole 2017. The interior of the limiting flow cylinder 2016 is movably connected to the limiting flow bead 2018. The plurality of second oil holes 2015 are located in the inner ring of the limiting flow cylinder 2016.When the vacuum pump 5 is working and vibrates, it will drive the supporting plate 207 to vibrate synchronously. When the supporting plate 207 moves downward, it will push the connecting plate 203 to move horizontally through the second hinge seat 206, the connecting rod 205 and the first hinge seat 204. At this time, the roller 209 at the bottom of the connecting plate 203 and the inner bottom of the guide groove 6 are in rolling friction, which further reduces noise and makes the connecting plate 203 move more smoothly. The connecting plate 203 will push the extrusion rod 2011 and the piston 2010 to retract into the buffer cylinder 202. At the same time, the connecting plate 203 will compress the spring 201. The spring 201 can absorb energy, reduce the vibration of the supporting plate 207, and squeeze the buffer oil in the buffer cylinder 202 into the temporary storage cylinder 2012. At this time, the buffer oil can push the flow limiting bead 2018 toward the oil sealing plate 2013, and the second oil hole 2015 is distributed in a ring shape. When the flow-limiting bead 218 contacts the oil sealing plate 2013, only the highest point of the flow-limiting bead 218 contacts the middle of the oil sealing plate 2013, without blocking the second oil hole 2015. Therefore, when the buffer oil enters the temporary storage cylinder 2012, the first oil hole 2014, the second oil hole 2015, and the third oil hole 2017 can all flow. When the buffer oil flows back, the flow-limiting bead 218 blocks the third oil hole 2017, and the buffer oil in the temporary storage cylinder 2012 can only flow back into the buffer cylinder 202 through the first oil hole 2014, thereby reducing the reset speed of the piston 2010 and the extrusion rod 2011, thereby limiting the rebound speed of the spring 201 and allowing the spring 201 to restore balance more quickly. This structure uses the interaction between the buffer structure and the spring 201 to achieve the purpose of shock absorption for the vacuum pump 5 during operation. The dual shock absorption design can achieve a better shock absorption effect.

[0028] The use method and advantages of this utility model: When the electric vacuum pump vibration reduction and noise reduction device is used, the working process is as follows:

[0029] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, first, the noise generated by the vacuum pump 5 when working is absorbed by the sound insulation cotton 301 on the inner wall of the body 1, and the noise generated by the vacuum pump 5 is preliminarily reduced. The remaining noise will be transmitted to the inner wall of the body 1. Under the action of the cavity layer 304, the resonance conversion and consumption of sound energy can be cut off. Without contact, there is no conduction of resonant sound energy, thereby achieving the purpose of noise reduction. When the vacuum pump 5 vibrates when working, it will drive the bearing plate 207 to vibrate synchronously. When the bearing plate 207 moves downward, it will pass through the second hinge seat 206 and the connecting rod 205 and the first hinge seat 204 push the connecting plate 203 to move in the horizontal direction. At this time, the roller 209 at the bottom of the connecting plate 203 and the inner bottom of the guide groove 6 are in rolling friction, which further reduces noise and makes the connecting plate 203 move more smoothly. The connecting plate 203 will push the extrusion rod 2011 and the piston 2010 to retract into the buffer cylinder 202. At the same time, the connecting plate 203 will compress the spring 201, which can absorb energy, reduce the vibration of the bearing plate 207, and reduce the buffer in the buffer cylinder 202. The flushing oil is squeezed into the temporary storage cylinder 2012. At this time, the buffer oil can push the flow-limiting bead 2018 toward the oil sealing plate 2013. The second oil hole 2015 is distributed in an annular shape. When the flow-limiting bead 2018 contacts the oil sealing plate 2013, only the highest point of the flow-limiting bead 2018 contacts the middle of the oil sealing plate 2013, and will not block the second oil hole 2015. Therefore, when the buffer oil enters the temporary storage cylinder 2012, the first oil hole 2014, the second oil hole 2015 and the third oil hole 2017 can all flow. When the buffer oil When the oil flows back, the flow-limiting bead 2018 blocks the third oil hole 2017. At this time, the buffer oil in the temporary storage cylinder 2012 can only flow back into the buffer cylinder 202 through the first oil hole 2014, thereby reducing the speed at which the piston 2010 and the extrusion rod 2011 return to their original position, thereby limiting the speed at which the spring 201 rebounds, and allowing the spring 201 to recover its balance faster. This structure uses the mutual cooperation between the buffer structure and the spring 201 to achieve the purpose of shock absorption of the vacuum pump 5 in the working state. The double shock absorption design can achieve a better shock absorption effect.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Persons skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration and noise reduction device for an electric vacuum pump, comprising a body (1), characterized in that: A shock absorbing component (2) is provided at the inner bottom of the machine body (1), a noise reduction component (3) is provided at the outer side of the machine body (1), two doors (4) are movably connected to the front side of the machine body (1), a vacuum pump (5) is fixedly connected to the top of the noise reduction component (3) by means of screws, and two guide grooves (6) are provided on the inner bottom surface of the machine body (1).

2. The vibration and noise reduction device for an electric vacuum pump according to claim 1, characterized in that: The noise reduction component (3) comprises a sound insulation cotton (301) fixedly connected to the inner wall of the body (1) and a circular sound insulation strip (302) fixedly connected to the outer side edge of the body (1), and a protective plate (303) is fixedly connected to the side of the circular sound insulation strip (302) away from the body (1).

3. The vibration and noise reduction device for an electric vacuum pump according to claim 2, characterized in that: A cavity layer (304) is provided between the circular sound insulation strip (302) and the protective plate (303), and a rubber frame (305) is fixedly connected between two adjacent protective plates (303).

4. The vibration and noise reduction device for an electric vacuum pump according to claim 1, characterized in that: The shock absorbing assembly (2) comprises a spring (201) and a buffer cylinder (202) fixedly connected to the inner walls of both sides of the machine body (1); one end of the spring (201) away from the inner wall of the machine body (1) is fixedly connected to a connecting plate (203); and the connecting plate (203) is fixedly connected to one side of two first hinge seats (204).

5. The vibration and noise reduction device for an electric vacuum pump according to claim 4, characterized in that: The middle parts of the two first hinged seats (204) are both hinged with connecting rods (205), the top ends of the connecting rods (205) are hinged to the middle parts of the second hinged seats (206), and the second hinged seats (206) are fixedly connected to the bottom surface of the bearing plate (207).

6. The vibration and noise reduction device for an electric vacuum pump according to claim 4, characterized in that: Two mounting plates (208) are fixedly connected to the middle of the bottom surface of the connecting plate (203), a roller (209) is rotatably connected between the two mounting plates (208), and the bottom of the roller (209) is rollingly connected to the inside of the guide groove (6).

7. The vibration and noise reduction device for an electric vacuum pump according to claim 4, characterized in that: The buffer cylinder (202) is slidably connected to a piston (2010) inside, a side of the piston (2010) is fixedly connected to an extrusion rod (2011), and the top of the buffer cylinder (202) is fixedly connected to a temporary storage cylinder (2012), and the temporary storage cylinder (2012) is perpendicular to the buffer cylinder (202).

8. The vibration and noise reduction device for an electric vacuum pump according to claim 7, characterized in that: An oil sealing plate (2013) is fixedly connected between the inner walls of the temporary storage cylinder (2012), and a plurality of first oil holes (2014) and a plurality of second oil holes (2015) are respectively opened in the middle of the oil sealing plate (2013), the plurality of first oil holes (2014) and the plurality of second oil holes (2015) are arranged in a ring shape, and the plurality of first oil holes (2014) are located outside the plurality of second oil holes (2015).

9. The vibration and noise reduction device for an electric vacuum pump according to claim 8, characterized in that: The bottom surface of the oil sealing plate (2013) is fixedly connected to the limiting flow cylinder (2016); a third oil hole (2017) is provided in the middle of the bottom surface of the limiting flow cylinder (2016); the inside of the limiting flow cylinder (2016) is movably connected to the limiting flow bead (2018); and a plurality of the second oil holes (2015) are located in the inner circle of the limiting flow cylinder (2016).

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