Air pump end cover and air pump

Abstract

The utility model relates to an air pump end cover and an air pump. The air pump end cover is provided with an end cover body. The end cover body comprises a cover body and a rubber coating layer; the cover body is made of a plastic material; the surface, located in a pump shell of the air pump, of the cover body is coated with a rubber coating layer. The rubber coating layer is made of an elastic material; a groove is formed in the end face, facing the interior of the pump shell, of the cover. Reinforcing ribs are distributed in the grooves; the grooves form a plurality of grid areas through distributed reinforcing ribs; an annular groove is coaxially formed in the circumferential surface, extending into the pump shell, of the cover body; the end face, facing the interior of the pump shell, of the cover body and the circumferential face, extending into the pump shell, of the cover body are coated with the rubber coating layer. And after the rubber coating layer is coated on the surfaces of the grooves and the reinforcing ribs, a silencing area is formed in the grid area. The air pump adopts the air pump end cover. The utility model provides a novel end cover noise reduction scheme, which is good in noise reduction effect, simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the field of air pumps and parts thereof, in particular to an air pump end cover and an air pump. Background Art

[0002] The air pump uses a motor to drive a connecting rod to inhale or pump out gas. Its structure includes a motor, a pump body and a connecting rod mechanism. The pump body includes a pump housing and an impeller connected to the output shaft of the motor, and an air inlet and outlet port is provided on the pump body. In the structural design, in order to facilitate the installation of the impeller, an end cover is provided on the pump housing to seal the pump housing. This structure of the air pump is suitable for oil-free air compressors, oil-free air pumps, micro compressors and other technical fields.

[0003] However, in oil-free air compressors, oil-free air pumps, micro compressors and other equipment, an end cover structure is designed to reduce noise, and the seal of the end cover is used to isolate the noise generated by the working moving parts inside.

[0004] In the existing end cover design, the sealing ring is generally used to achieve the sealing match between the end cover and the pump housing. The principle is that after the sealing ring is installed in the sealing ring groove of the end cover, it is pressed into the motor bracket and fixed, and the sealing effect of the sealing ring and the structure of the end cover are used to isolate the noise generated when the moving parts are working.

[0005] Generally, the end cap is made of metal or plastic. However, the existing metal end caps or plastic end caps have the following defects:

[0006] (1) The metal end cover has a relatively good sound insulation effect, but the cost is high. Generally, die-cast aluminum is used, the sealing ring groove is obtained by processing, and the sealing ring is used during installation, which is costly.

[0007] (2) The sound insulation effect of plastic end caps is worse than that of metal ones, and they are generally formed by injection molding. Increasing the wall thickness of the end caps can improve the sound insulation effect, but after increasing the wall thickness, injection molding is very difficult and the pass rate is poor. Due to process problems, the sealing ring groove needs to be processed by machine tools, and the final material cost and process cost are relatively high, and the sealing ring needs to be installed during installation.

[0008] Therefore, how to achieve good sound insulation and noise reduction effects while reducing process costs is one of the technical problems that need to be urgently solved in this field. Utility Model Content

[0009] The first object of the utility model is to provide an air pump end cover, which is made of a combination of plastic and elastic materials, which not only reduces costs through the plastic material, but also achieves better sound insulation and noise reduction effects in combination with the elastic material.

[0010] The technical solution for achieving the first purpose of the utility model is: in the utility model, the air pump end cover has an end cover body; the end cover body includes a cover body and a rubber coating; the cover body is made of plastic; the surface of the cover body located inside the pump casing of the air pump is coated with the rubber coating; the rubber coating is made of elastic material; a groove is provided on the end face of the cover body facing the inside of the pump casing; reinforcing ribs are arranged in the groove; the groove forms a plurality of lattice areas through the distributed reinforcing ribs; an annular groove is coaxially provided on the circumferential surface of the cover body extending into the inside of the pump casing; the rubber coating is coated on the end face of the cover body facing the inside of the pump casing and the circumferential surface of the cover body extending into the inside of the pump casing; after the rubber coating is coated on the groove and the surface of the reinforcing ribs, a sound-absorbing area is formed in the lattice area.

[0011] Furthermore, a sealing ring portion is provided on the circumferential surface of the rubber coating where the cover extends into the interior of the pump casing.

[0012] Furthermore, the above-mentioned groove is a circular groove; the reinforcing ribs include at least one annular reinforcing rib coaxially arranged with the groove, and a plurality of radial reinforcing ribs evenly distributed along the central circumference of the groove and extending radially from the center of the groove; the side wall of the groove, the annular reinforcing ribs and the radial reinforcing ribs are combined to form a plurality of fan-shaped lattice areas; the lattice areas form a plurality of fan-shaped sound-absorbing zones under the covering of the rubber layer.

[0013] Furthermore, the above-mentioned reinforcement ribs include two annular reinforcement ribs coaxially arranged with the groove, wherein the annular reinforcement rib with a smaller diameter forms a circular lattice area, and the lattice area forms a circular sound-absorbing area under the covering of the rubber layer; the radial reinforcement ribs extend radially outward from the outer side wall of the annular reinforcement rib with a smaller diameter.

[0014] The second object of the utility model is to provide an air pump which adopts the above-mentioned air pump end cover and has an outstanding overall noise reduction effect.

[0015] The technical solution for achieving the second purpose of the utility model is: the air pump in the utility model includes a dual-output shaft motor; a first pump body and a second pump body are respectively provided at the two output ends of the dual-output motor; the first pump body includes a first pump shell fixedly connected to the outer shell of the dual-output motor, and a first connecting rod assembly arranged in the first pump shell and forming a transmission connection with the output shaft at one end of the dual-output motor; the second pump body includes a second pump shell fixedly connected to the outer shell of the dual-output motor, and a second connecting rod assembly arranged in the second pump shell and forming a transmission connection with the output shaft at the other end of the dual-output motor; it is characterized in that: the above-mentioned air pump end covers are provided on the first pump shell and the second pump shell.

[0016] The utility model has positive effects: (1) The utility model has good noise reduction effect: because the cover body is increased with a rubber coating layer, it can achieve the same or better noise reduction effect as metal end covers or thick plastic end covers; compared with end covers with the same plastic thickness, it can achieve a better sealing effect; at the same time, the structure is simple and no additional processing of the sealing ring groove is required; it is easy to install and no additional sealing ring is required.

[0017] (2) Compared with the end caps made of metal materials, the material cost of plastic and rubber coating of the utility model is lower; since the plastic parts are subsequently rubber coated, there is no need to process the sealing ring groove, which also saves processing costs; compared with the thick plastic end caps, the new structure can achieve a smaller plastic thickness under the same noise reduction effect, and can be very conveniently injection molded with good molding effect, which can greatly improve the product qualification rate and reduce material costs and process costs.

[0018] (3) The rubber layer in the utility model is made of elastic material. Since the elastic material has the characteristics of elasticity and high damping, it can absorb and dissipate the energy of sound waves, reduce the conduction and reflection of sound, and its high damping characteristics can effectively prevent the propagation of sound waves and reduce the diffusion range of noise. It has excellent sound insulation and shock absorption effects. It is widely used in various industries such as automobiles.

[0019] (4) The design of the sound-absorbing and sound-reducing area in the present invention can further improve the sound absorption and sound-reducing effects.

[0020] (5) The sealing ring portion of the rubber layer in the utility model can have a good sealing effect like the sealing ring, further improving the sealing and sound insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the structure of the air pump end cover in the utility model;

[0023] Figure 2 It is a cross-sectional view of the air pump end cover in the utility model;

[0024] Figure 3 It is a structural schematic diagram of the cover body in the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the rubber layer in the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the air pump in the utility model;

[0027] Figure 6 It is a cross-sectional view of the air pump in the utility model. DETAILED DESCRIPTION

[0028] See Figures 1 to 4 The utility model air pump end cover has an end cover body; the end cover body includes a cover body 1 and a rubber coating layer 2; the cover body 1 is made of plastic; the surface of the cover body 1 located inside the pump housing of the air pump is coated with the rubber coating layer 2; the rubber coating layer 2 is made of elastic material. The coating process of the rubber coating layer 2 and the cover body 1 can adopt a TPE secondary injection coating process.

[0029] A groove 11 is provided on the end surface of the cover body 1 facing the inside of the pump casing; reinforcing ribs 12 are arranged in the groove 11; the groove 11 forms a plurality of lattice areas 13 through the distributed reinforcing ribs 12; an annular groove 14 is coaxially provided on the circumferential surface of the cover body 1 extending into the inside of the pump casing; the rubber coating layer 2 is coated on the end surface of the cover body 1 facing the inside of the pump casing and the circumferential surface of the cover body 1 extending into the inside of the pump casing; the annular groove 14 allows the rubber coating layer 2 to be more firmly coated on the cover body 1; after the rubber coating layer 2 is coated on the surface of the groove 11 and the reinforcing ribs 12, a sound-absorbing zone is formed in the lattice area.

[0030] A sealing ring portion 21 is provided on the circumferential surface of the rubber coating 2 which is located at the part of the cover 1 extending into the interior of the pump housing.

[0031] The groove 11 is a circular groove; the reinforcing ribs 12 include two annular reinforcing ribs 121 coaxially arranged with the groove 11, and a plurality of radial reinforcing ribs 122 evenly distributed along the central circumference of the groove 11 and extending radially from the center of the groove 11; the annular reinforcing rib 121 with a smaller diameter among the two annular reinforcing ribs 121 forms a circular lattice area 13, and the lattice area 13 forms a circular silencing area under the covering of the rubber layer 2; the radial reinforcing ribs 122 extend radially outward from the outer side wall of the annular reinforcing rib 121 with a smaller diameter. The side wall of the groove 11, the annular reinforcing ribs 121 and the radial reinforcing ribs 122 are combined to form a plurality of fan-shaped lattice areas 13; the lattice area 13 forms a plurality of fan-shaped silencing areas under the covering of the rubber layer 2.

[0032] See Figure 5 and Figure 6 The air pump in the utility model comprises a dual-output shaft motor 3; a first pump body 4 and a second pump body 5 are respectively provided at the two output ends of the dual-output motor 3; the first pump body 4 comprises a first pump shell fixedly connected to the outer shell of the dual-output motor 3, and a first connecting rod assembly 6 arranged in the first pump shell and forming a transmission connection with the output shaft at one end of the dual-output motor 3; the second pump body 5 comprises a second pump shell fixedly connected to the outer shell of the dual-output motor 3, and a second connecting rod assembly 7 arranged in the second pump shell and forming a transmission connection with the output shaft at the other end of the dual-output motor 3; the first pump shell and the second pump shell are both provided with the above-mentioned air pump end covers.

[0033] The first connecting rod assembly 6 and the second connecting rod assembly 7 are both components of the existing air pump, so they are not described here. The principle is simple, that is, the output end of the dual output motor 3 drives the cam to rotate by rotating, the cam drives the connecting rod assembly matched with it to move, and the movement of the connecting rod assembly drives the piston to move in the pump housing.

[0034] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air pump end cover, comprising an end cover body; characterized in that: The end cover body includes a cover body and a rubber coating; the cover body is made of plastic; the surface of the cover body located inside the pump housing of the air pump is coated with the rubber coating; the rubber coating is made of elastic material; a groove is provided on the end surface of the cover body facing the inside of the pump housing; reinforcing ribs are arranged in the groove; the groove forms a plurality of lattice areas through the distributed reinforcing ribs; a coaxial annular groove is provided on the circumferential surface of the cover body extending into the inside of the pump housing; the rubber coating is coated on the end surface of the cover body facing the inside of the pump housing and the circumferential surface of the cover body extending into the inside of the pump housing; after the rubber coating is coated on the groove and the surface of the reinforcing ribs, a sound-absorbing area is formed in the lattice area.

2. An air pump end cover according to claim 1, characterized in that: The rubber coating is located on the circumferential surface of the cover body extending into the interior of the pump casing and is provided with a sealing ring portion.

3. The air pump end cover according to claim 1, characterized in that: The groove is a circular groove; the reinforcing ribs include at least one annular reinforcing rib coaxially arranged with the groove, and a plurality of radial reinforcing ribs evenly distributed along the central circumference of the groove and extending radially from the center of the groove; the side wall of the groove, the annular reinforcing ribs and the radial reinforcing ribs are combined to form a plurality of fan-shaped lattice areas; the lattice areas form a plurality of fan-shaped sound-absorbing areas under the covering of the rubber layer.

4. An air pump end cover according to claim 3, characterized in that: The reinforcing ribs include two annular reinforcing ribs coaxially arranged with the grooves, wherein the annular reinforcing ribs with a smaller diameter form a circular lattice area, and the lattice area forms a circular sound-absorbing area under the covering of the rubber layer; the radial reinforcing ribs extend radially outward from the outer side wall of the annular reinforcing ribs with a smaller diameter.

5. An air pump, comprising a dual-output shaft motor; a first pump body and a second pump body are respectively provided at the two output ends of the dual-output motor; the first pump body comprises a first pump housing fixedly connected to the housing of the dual-output motor, and a first connecting rod assembly arranged in the first pump housing and forming a transmission connection with the output shaft at one end of the dual-output motor; the second pump body comprises a second pump housing fixedly connected to the housing of the dual-output motor, and a second connecting rod assembly arranged in the second pump housing and forming a transmission connection with the output shaft at the other end of the dual-output motor; characterized in that: The first pump housing and the second pump housing are both provided with the air pump end cover according to claim 1 or 2 or 3 or 4.

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