High-energy-efficiency inflating pump for air suspension

Abstract

The utility model relates to the technical field of inflation pumps, in particular to a high-energy-efficiency inflation pump for an air suspension. The device comprises an air pump and a motor, the air pump comprises a shell, an eccentric shaft connected with an output shaft of the motor and a plurality of piston connecting rod assemblies installed in the shell, each piston connecting rod assembly comprises a connecting rod, a piston ring and an exhaust valve, the connecting rod comprises a first end and a second end which are opposite, and the second end is sleeved with an air cylinder and can reciprocate in the air cylinder; the end, away from the motor, of the eccentric shaft is connected with a bearing, the first end is provided with a clamping groove, an outer ring of the bearing is installed in the clamping groove, and an elastic wear-resistant pad is installed in the clamping groove and can wrap the upper, lower and peripheral side faces of the outer ring of the bearing; after the prior art is improved, the elastic wear-resistant pad is arranged between the clamping groove at the first end of the connecting rod and the outer ring of the bearing, so that the noise can be reduced and the shock absorption and buffering can be realized while the wear is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a high-energy-efficiency air pump for air suspension. Background Art

[0002] Passenger cars or commercial vehicles use air spring air supply systems to change the height of the vehicle body and adjust the stiffness or damping of the suspension, thereby improving the vehicle's passability and comfort. The air spring airbag of the air spring air supply system needs to be filled with high-pressure air to complete the support of the vehicle, and the high-pressure air in the airbag also needs to be released when the vehicle body height is lowered. The existing air spring air supply system includes a supercharger, an air tank and multiple air spring airbags. The supercharger is connected to the air tank and multiple air spring airbags through air pipes. The supercharger is used to deliver high-pressure air to the air tank and multiple air spring airbags. The existing supercharger uses a two-cylinder piston connecting rod mechanism or a three-cylinder piston connecting rod mechanism. Whether it is a two-cylinder or a three-cylinder, it has the following disadvantages: unbalanced vibration, low first-order modal frequency, and it is difficult to eliminate the vibration noise caused by it on the whole vehicle; due to the small number of cylinders, in order to increase the displacement, the stroke is often designed to be large, which will increase the overall size of the product.

[0003] In view of this, a Chinese patent document with publication number CN116608106A discloses a supercharger, including an air pump and a motor, the air pump including a housing and four piston-connecting rod assemblies and an eccentric shaft installed in the housing, four cylinders are arranged in the housing, one end of each piston-connecting rod assembly is movably arranged in each cylinder, the other end of each piston-connecting rod assembly is connected to the eccentric shaft, the motor is connected to the eccentric shaft, the motor is used to drive the eccentric shaft to rotate to achieve compressed air, the piston-connecting rod assembly includes a connecting rod, a piston ring and an intake valve, the connecting rod includes a first end and a second end opposite to each other, the first end is connected to the eccentric shaft, the second end is arranged in the cylinder, the piston ring and the intake valve are connected to the second end, a bearing is connected to the eccentric shaft, the first end is provided with a clamping groove, and the outer ring of the bearing is installed in the clamping groove. The above-mentioned supercharger adopts a four-cylinder small stroke arrangement, which can effectively reduce exhaust noise and improve air compression efficiency without increasing the size. However, when the eccentric shaft rotates, the connecting rod is linked, and a small angle of mutual deflection occurs between the outer ring of the bearing and the engaging groove at the first end of the connecting rod, which causes wear and noise, thereby affecting the service life of the supercharger.

[0004] Therefore, it is necessary to improve the deficiencies in the above prior art. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a high-efficiency air pump for air suspension in view of the deficiencies of the above-mentioned prior art, so as to solve the problem in the prior art that when the eccentric shaft rotates, the connecting rod is linked, and there is a small angle of mutual deflection between the outer ring of the bearing and the clamping groove at the first end of the connecting rod, which causes wear and noise, thereby affecting the service life of the supercharger.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a high-efficiency air pump for air suspension, comprising an air pump and a motor, the air pump comprising a housing, an eccentric shaft connected to the output shaft of the motor, and a plurality of piston-connecting rod assemblies installed in the housing, the piston-connecting rod assemblies comprising a connecting rod, a piston ring and an exhaust valve, the connecting rod comprising a first end and a second end opposite to each other, the second end being outer-circuited with a cylinder and reciprocating in the cylinder, the eccentric shaft being connected to a bearing at one end away from the motor, the first end being provided with a clamping groove, the outer ring of the bearing being installed in the clamping groove, an elastic wear-resistant pad being installed in the clamping groove, the elastic wear-resistant pad being able to wrap the upper and lower and outer peripheral sides of the outer ring of the bearing.

[0007] By adopting the above technical solution, when the air pump is working, the motor drives the eccentric shaft to rotate, and the eccentric shaft pushes and pulls the connecting rod to move back and forth in the cylinder and drives the piston ring to squeeze the air and discharge it unidirectionally through the exhaust valve, thereby delivering high-pressure air to the air storage tank or multiple air spring airbags; in this process, there will be a small angle of mutual deflection between the outer ring of the bearing and the clamping groove at the first end of the connecting rod. By arranging an elastic wear-resistant pad between the clamping groove at the first end of the connecting rod and the outer ring of the bearing, the outer ring of the bearing does not directly rub against the clamping groove at the first end of the connecting rod, thereby reducing wear and reducing noise and shock absorption.

[0008] The above technical solution is further configured as follows: convex strips are extended outward from one side of the upper and lower ends of the elastic wear-resistant pad close to the bottom surface of the clamping groove, and grooves that can be clamped with the convex strips are provided on the upper and lower side surfaces of the clamping groove.

[0009] By adopting the above technical solution, the elastic wear-resistant pad is clamped by inserting the convex strips at the upper and lower ends into the grooves of the clamping groove, so as to limit the radial position of the elastic wear-resistant pad relative to the bearing and improve the stability of the installation.

[0010] The above technical solution is further configured as follows: the left and right sides of the elastic wear-resistant pad are further provided with limiting parts capable of abutting against the two side surfaces of the connecting rod.

[0011] By adopting the above technical solution, the elastic wear-resistant pad can be limited in the circumferential direction relative to the bearing through the limiting part, thereby further improving the stability of the installation.

[0012] The above technical solution is further configured as follows: the bottom of the clamping groove is small and the groove opening is large, and its upper and lower sides form a wedge-shaped inclined surface, and the upper and lower sides of the elastic wear-resistant pad can fit tightly with the wedge-shaped inclined surface.

[0013] By adopting the above technical solution, the elastic wear-resistant pad fits tightly with the wedge-shaped inclined surfaces on both sides of the clamping groove, so that the elastic wear-resistant pad and the clamping groove of the connecting rod fit more firmly. When the connecting rod and the outer ring of the bearing are relatively deflected, the elastic wear-resistant pad is not easy to detach from the clamping groove, thereby further improving the stability of the installation.

[0014] The above technical solution is further configured as follows: the piston connecting rod assembly is configured as four, the first end is configured with a fixed block protruding along the axial direction of the eccentric shaft, the fixed blocks of the four connecting rods are configured around the eccentric shaft at 90° to each other, and the four fixed blocks are connected by a retaining spring.

[0015] By adopting the above technical solution and providing four piston-connecting rod assemblies, the exhaust noise can be effectively reduced and the air compression efficiency can be improved without increasing the size.

[0016] The above technical solution is further configured as follows: an installation channel for installing a piston-connecting rod assembly is provided on the shell, the exhaust valve includes an exhaust cover, an exhaust seat and an exhaust valve plate, the exhaust cover is arranged opposite to the exhaust seat, the exhaust valve plate is installed on the exhaust seat, an exhaust hole is provided at the center of the exhaust seat, the exhaust valve plate can block the exhaust hole, the exhaust cover is detachably installed at the end of the installation channel, and the exhaust seat is sealed and sleeved on the periphery of the cylinder.

[0017] By adopting the above technical scheme, the exhaust cover can be detachably installed at the end of the installation channel, so that the parts of the piston-connecting rod assembly can be installed more conveniently; the connecting rod pushes the piston ring to squeeze the air in the cylinder so that the air pressure inside the cylinder continues to increase until the exhaust valve plate is opened to discharge the air through the exhaust hole and finally enter the air storage tank; conversely, the connecting rod pulls the piston ring, and air continuously enters the cylinder, and the exhaust valve plate is closed to block the exhaust hole, so that the air does not flow back into the cylinder.

[0018] The above technical solution is further configured as follows: an external thread is provided on the outer periphery of the exhaust cover, an internal thread matching the external thread is provided on the end of the installation channel, a first sealing groove is provided on one end of the exhaust cover close to the cap, a first sealing ring is installed in the first sealing groove, and the first sealing ring can fit against the inner wall of the installation channel.

[0019] By adopting the above technical solution, the exhaust cover and the end of the installation channel are connected by threads to achieve assembly and disassembly, which is simple and convenient; the first sealing ring arranged between the exhaust cover and the inner wall of the installation channel can ensure the sealing and avoid air leakage.

[0020] The above technical solution is further configured as follows: a second sealing groove is provided on the outer periphery of one end of the cylinder close to the exhaust seat, a second sealing ring is sleeved in the second sealing groove, and the second sealing ring can fit against the inner wall of the exhaust seat.

[0021] By adopting the above technical solution, a sealed connection is achieved between the cylinder and the exhaust seat through the second sealing ring to avoid air leakage.

[0022] The beneficial effect achieved by the utility model is that by arranging an elastic wear-resistant pad between the clamping groove at the first end of the connecting rod and the outer ring of the bearing, the wear can be reduced while the noise and shock absorption can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0024] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0025] Figure 3 It is a schematic diagram of the exploded structure of the piston-connecting rod assembly in the embodiment of the utility model;

[0026] Figure 4 yes Figure 3 Partial view at A in the middle;

[0027] Figure 5 It is a structural schematic diagram of four piston connecting rod assemblies in an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-5As shown in, a high-efficiency air pump for air suspension includes an air pump 1 and a motor 2. The air pump 1 includes a housing 11, an eccentric shaft 12 connected to the output shaft of the motor 2, and four piston-connecting rod assemblies 3 installed in the housing 11. The piston-connecting rod assembly 3 includes a connecting rod 31, a piston ring 32 and an exhaust valve 33. The connecting rod 31 includes a first end 311 and a second end 312 opposite to each other. The second end 312 is provided with a cylinder 34 and can reciprocate in the cylinder 34. The eccentric shaft 12 is connected to a bearing 13 at one end away from the motor 2. The first end 311 is provided with a clamping groove 3110. The outer ring of the bearing 13 is installed in the clamping groove 3110. An elastic and resistant The grinding pad 14, the elastic wear-resistant pad 14 can wrap the upper and lower and outer peripheral sides of the outer ring of the bearing 13, and the upper and lower ends of the elastic wear-resistant pad 14 are provided with a convex strip 141 extending outward from one side close to the bottom surface of the clamping groove 3110, and the upper and lower side surfaces of the clamping groove 3110 are provided with grooves 3111 that can be clamped with the convex strip 141. The left and right sides of the elastic wear-resistant pad 14 are also provided with limiting portions 142 that can abut against the two side surfaces of the connecting rod 31. The bottom of the clamping groove 3110 is small and the notch is large, and its upper and lower sides form a wedge-shaped inclined surface 3112. The upper and lower side surfaces of the elastic wear-resistant pad 14 can fit tightly with the wedge-shaped inclined surface 3112, and the elastic wear-resistant pad 14 can be made of rubber material.

[0030] like Figure 5 As shown in the figure, the first end 311 is provided with a fixing block 3113 protruding along the axial direction of the eccentric shaft 12, and the fixing blocks 3113 of the four connecting rods 31 are arranged around the eccentric shaft 12 at 90 degrees to each other, and the four fixing blocks 3113 are connected by a retaining spring 313.

[0031] like Figure 2 , 3 As shown in the figure, the housing 11 is provided with a mounting channel 10 for mounting the piston connecting rod assembly 3, the exhaust valve 33 includes an exhaust cover 331, an exhaust seat 332 and an exhaust valve plate 333, the exhaust cover 331 is arranged opposite to the exhaust seat 332, the exhaust valve plate 333 is installed on the exhaust seat 332, an exhaust hole 3320 is arranged at the center of the exhaust seat 332, the exhaust valve plate 333 can block the exhaust hole 3320, the exhaust seat 332 is sealingly sleeved on the periphery of the cylinder 34, the exhaust cover 331 is provided with an external thread on the periphery, and the end of the mounting channel 10 is provided with a The exhaust cover 331 is detachably mounted on the end of the installation channel 10 through a threaded connection with an adapted internal thread. The exhaust cover 331 is provided with a first sealing groove 3310 at one end near the cap. A first sealing ring 3311 is mounted in the first sealing groove 3310. The first sealing ring 3311 can fit against the inner wall of the installation channel 10. A second sealing groove 340 is provided on the outer periphery of one end of the cylinder 34 near the exhaust seat 332. A second sealing ring 341 is mounted in the second sealing groove 340. The second sealing ring 341 can fit against the inner wall of the exhaust seat 332.

[0032] In the above embodiment, when the air pump is working, the motor 2 drives the eccentric shaft 12 to rotate, and the eccentric shaft 12 pushes and pulls the connecting rod 31 to move back and forth in the cylinder 34 and drives the piston ring 32 to squeeze the air through the exhaust valve 33 to discharge it unidirectionally, and delivers high-pressure air to the air storage tank or multiple air spring airbags; in this process, there will be a small angle of mutual deflection between the outer ring of the bearing 13 and the snap-in groove 3110 at the first end 311 of the connecting rod 31. By setting an elastic wear-resistant pad 14 between the snap-in groove 3110 at the first end 311 of the connecting rod 31 and the outer ring of the bearing 13, the outer ring of the bearing 13 does not directly rub against the snap-in groove 3110 at the first end 311 of the connecting rod 31, which can reduce wear and reduce noise and shock absorption.

Claims

1. An energy-efficient air pump for air suspension, comprising an air pump and a motor, the air pump comprising a housing, an eccentric shaft connected to the output shaft of the motor, and a plurality of piston-connecting rod assemblies installed in the housing, the piston-connecting rod assemblies comprising a connecting rod, a piston ring, and an exhaust valve, the connecting rod comprising a first end and a second end opposite to each other, the second end being provided with a cylinder on the outer sleeve and being reciprocatingly movable in the cylinder, the eccentric shaft being connected to a bearing at one end away from the motor, the first end being provided with a clamping groove, the outer ring of the bearing being installed in the clamping groove, and characterized in that: An elastic wear-resistant pad is installed in the clamping groove, and the elastic wear-resistant pad can wrap the upper and lower sides and the outer periphery of the outer ring of the bearing.

2. The high-efficiency air pump for air suspension according to claim 1, characterized in that: The elastic wear-resistant pad has convex strips extending outwards from one side of the upper and lower ends close to the bottom surface of the clamping groove, and the upper and lower side surfaces of the clamping groove are provided with grooves that can be clamped and matched with the convex strips.

3. The high-efficiency air pump for air suspension according to claim 2, characterized in that: The elastic wear-resistant pad is also provided with limiting parts on the left and right sides thereof, which can abut against the two side surfaces of the connecting rod.

4. The high-efficiency air pump for air suspension according to claim 3, characterized in that: The bottom of the clamping groove is small and the groove opening is large, and the upper and lower side surfaces thereof form a wedge-shaped inclined surface, and the upper and lower side surfaces of the elastic wear-resistant pad can be closely fitted with the wedge-shaped inclined surface.

5. A high-efficiency air pump for air suspension according to any one of claims 1 to 4, characterized in that: The piston connecting rod assembly is provided in four pieces, the first end is provided with a fixing block protruding along the axial direction of the eccentric shaft, the fixing blocks of the four connecting rods are arranged around the eccentric shaft at 90 degrees to each other, and the four fixing blocks are connected by a retaining spring.

6. The high-efficiency air pump for air suspension according to claim 5, characterized in that: The shell is provided with an installation channel for installing the piston-connecting rod assembly, and the exhaust valve includes an exhaust cover, an exhaust seat and an exhaust valve plate. The exhaust cover is arranged opposite to the exhaust seat, and the exhaust valve plate is installed on the exhaust seat. An exhaust hole is provided at the center of the exhaust seat, and the exhaust valve plate can block the exhaust hole. The exhaust cover is detachably installed at the end of the installation channel, and the exhaust seat is sealingly sleeved on the periphery of the cylinder.

7. The high-efficiency air pump for air suspension according to claim 6, characterized in that: The exhaust cover is provided with an external thread on its outer periphery, and an internal thread matching the external thread is provided at the end of the installation channel. The exhaust cover is provided with a first sealing groove at one end close to the cap, and a first sealing ring is installed in the first sealing groove, and the first sealing ring can fit with the inner wall of the installation channel.

8. The high-efficiency air pump for air suspension according to claim 7, characterized in that: A second sealing groove is provided on the outer periphery of one end of the cylinder close to the exhaust seat, a second sealing ring is sleeved in the second sealing groove, and the second sealing ring can fit with the inner wall of the exhaust seat.

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