An air pump based on pressure feedback self-regulation and pressure feedback self-regulation method

Abstract

The present invention relates to the technical field of air pumps, and specifically to an air pump based on pressure feedback self-regulation and a pressure feedback self-regulation method, comprising: an outer shell, a pump cylinder body is arranged in the outer shell, a first inner cylinder and a second inner cylinder are arranged in the pump cylinder body, the inner diameter of the first inner cylinder is larger than the inner diameter of the second inner cylinder; a piston plate group, which is sealingly and slidably arranged in the pump cylinder body, and a power component installed in the outer shell can drive the piston plate group to reciprocate in the first inner cylinder or the second inner cylinder; a pressure measuring structure, which is connected to an air supply pipe arranged on the pump cylinder body, and a trigger part is arranged on the pressure measuring structure; a switching component, which connects the power component and the pump cylinder body, and when the pressure in the air supply pipe reaches a predetermined value, the trigger part cooperates with the switching component to enable the pump cylinder body to move relative to the power component, and the piston plate group to reciprocate in the second inner cylinder, so as to autonomously adjust the inflation speed and improve the control accuracy during the inflation process.

Description

Technical Field

[0001] The invention relates to an air pump technology, in particular to an air pump based on pressure feedback self-regulation and a pressure feedback self-regulation method. Background Art

[0002] Air pumps are widely used in vehicles, industry, medical and other fields due to their advantages such as high efficiency, portability, stability and reliability. They are driven by electricity and can compress air to generate air pressure.

[0003] When using an air pump, you need to consider the air pressure that the inflated equipment can withstand. For example, when inflating a vehicle's tire, if the amount of air is too large, the tire pressure will be too high, affecting the vehicle's driving comfort and posing the risk of a tire blowout. In the industrial field, overcharging the inflatable equipment will affect the equipment's sealing.

[0004] In order to address the above problems, most existing air pumps are equipped with pressure sensors inside, which control the inflation speed by detecting the pressure. When the pressure inside the equipment is about to reach the preset value, the minimum inflation speed is provided, so that technicians can accurately shut down the air pump to ensure that the air pressure is sufficient and not excessive. However, the detection accuracy of the pressure sensor will be affected by external factors, such as temperature and humidity, which will cause errors in the detection results. At this time, the inflation speed of the air pump will also be affected, accompanied by symptoms of delayed action. In this state, it is difficult for technicians to accurately grasp the timing of controlling the air pump to stop working, which can easily cause overcharging of the equipment and affect the stable operation of the equipment. Summary of the invention

[0005] The object of the present invention is to provide an air pump based on pressure feedback self-regulation and a pressure feedback self-regulation method to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an air pump based on pressure feedback self-regulation, comprising: an outer shell, a pump cylinder body is arranged in the outer shell, a first inner cylinder and a second inner cylinder are arranged in the pump cylinder body, the inner diameter of the first inner cylinder is larger than the inner diameter of the second inner cylinder; a piston plate group, sealingly and slidably arranged in the pump cylinder body, a power component installed in the outer shell can drive the piston plate group to reciprocate in the first inner cylinder or the second inner cylinder; a pressure measuring structure, connected to an air supply pipe arranged on the pump cylinder body, a trigger part is arranged on the pressure measuring structure; a switching component, connecting the power component and the pump cylinder body, when the pressure in the air supply pipe reaches a predetermined value, the trigger part cooperates with the switching component to enable the pump cylinder body to move relative to the power component, and the piston plate group to reciprocate in the second inner cylinder.

[0007] As a further solution of the present invention: the piston plate group includes a coaxially arranged sealing ring and a sealing plug, the sealing plug is provided with a connecting rod penetrating the pump cylinder body, and the connecting rod is connected to the power assembly; the piston plate group also includes a plurality of hysteresis chambers arranged in the pump cylinder body, a first spring is arranged in the hysteresis chamber, and the first spring is connected to the sealing plug.

[0008] As a further solution of the present invention: an inner conical surface is formed on the inner wall of the sealing ring, and an outer conical surface is formed on the outer wall of the sealing plug. The inner conical surface cooperates with the outer conical surface to drive the sealing ring to move when the sealing plug moves away from the power component.

[0009] As a further solution of the present invention: the power assembly includes a guide rod connected to the pump cylinder body, the end of the guide rod away from the pump cylinder body is connected to a bracket, a driving device is fixedly mounted on the bracket, the output shaft of the driving device is connected to an eccentric wheel arranged on the bracket through a bevel gear set; an articulated rod is rotatably mounted at the eccentric position of the eccentric wheel, and the articulated rod is rotatably connected to the connecting rod.

[0010] As a further solution of the present invention: the pressure measuring structure includes a connecting cylinder body connected to the air supply pipe, a follower slide is sealingly and slidably installed in the connecting cylinder body, a telescopic shaft penetrating the connecting cylinder body is fixed on the follower slide, and the telescopic shaft and the trigger part are integrally formed; two inclined guide surfaces are symmetrically arranged on the trigger part; a second spring is also sleeved on the telescopic shaft, one end of the second spring is connected to the follower slide, and the other end is connected to the inner wall of the connecting cylinder body.

[0011] As a further solution of the present invention: the switching assembly includes: a guide plate, installed on the pump cylinder body, and a two-way locking groove is arranged on the guide plate; an energy storage structure, connected to the bracket through a connecting plate, and the energy storage structure is provided with a coaxial wheel group capable of rolling in the two-way locking groove, and when the trigger part cooperates with the coaxial wheel group, the energy storage structure can move along the length direction of the two-way locking groove.

[0012] As a further solution of the present invention: the bidirectional locking groove includes two groups of inclined grooves symmetrically arranged on the guide plate, and the head and tail ends of the inclined grooves are respectively connected with the first straight groove and the second straight groove; along the head and tail directions of the inclined grooves, the distance between the two groups of inclined grooves gradually decreases.

[0013] As a further solution of the present invention: the energy storage structure includes a transverse axis arranged on the guide plate, the transverse axis is connected to the connecting plate, and a sliding connection part is arranged at the end of the transverse axis, and the sliding connection part is slidingly connected to the guide plate; two sliding sleeves are also symmetrically slidably installed on the transverse axis, an operating shaft is fixed on the sliding sleeve, a groove wheel and an abutment wheel are rotatably installed on the operating shaft, and the operating shaft, the groove wheel and the abutment wheel form the coaxial wheel group; a third spring is also sleeved on the transverse axis, one end of the third spring is connected to the end of the transverse axis, and the other end is connected to the sliding sleeve.

[0014] A method for self-regulating air pump pressure feedback, applied to the air pump based on self-regulation based on pressure feedback, comprises the following steps:

[0015] Step 1: Connect the air supply pipe to the equipment to be inflated;

[0016] Step 2: Start the power assembly, which drives the piston plate assembly to reciprocate in the first inner cylinder to pump air into the device to be inflated;

[0017] Step 3: As the air pressure in the device to be inflated increases, the pressure measuring structure is activated, and the triggering part is activated, and when the pressure in the device to be inflated reaches a predetermined value, the triggering part triggers the switching component to operate;

[0018] Step 4: When the switching assembly is in action, the pump cylinder body is driven to move away from the power assembly, so that the piston plate assembly moves in the second inner cylinder, thereby reducing the inflation speed;

[0019] Step 5: When the air pressure of the device to be inflated reaches a preset value, the power component is controlled to stop working.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: by providing the first inner cylinder, the second inner cylinder, the piston plate group and the power assembly, during the reciprocating action of the connecting rod, on the one hand, the sealing plug and the sealing ring can be driven to reciprocate in the first inner cylinder, and the air pumping speed is faster at this time, so that gas can be quickly pumped into the inflated device in the initial stage of inflation to accelerate the inflation speed; on the other hand, the sealing plug can be driven to reciprocate in the second inner cylinder, and the air pumping speed is slower at this time, so that when the air pressure in the inflated device reaches a preset value, the timing of stopping the power assembly can be more accurately controlled to avoid over-inflation of the inflated device. Inflating phenomenon can be prevented to prevent the air tightness of the inflated equipment from being destroyed due to overfilling; through the set pressure measuring structure and switching components, on the one hand, the bracket can maintain good stability under the two pumping speeds, avoiding the displacement of the bracket during the reverse movement of the sealing plug and the sealing ring to form a negative pressure, thereby reducing the pumping volume and ensuring the stable pumping of the gas; on the other hand, through the cooperation of the groove wheel and the inclined groove, the bracket can be driven to switch its position through the connecting plate, thereby realizing the switching of the two pumping speeds, further preventing the equipment from being overcharged due to the error in the timing of stopping the control drive device when the pressure in the inflated equipment reaches the preset value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of an embodiment of an air pump based on pressure feedback self-regulation;

[0022] Figure 2 A schematic diagram of the structure of an outer shell in an embodiment of an air pump based on pressure feedback self-regulation;

[0023] Figure 3 A schematic diagram of the structure of another angle in the outer shell of an embodiment of an air pump based on pressure feedback self-regulation;

[0024] Figure 4 A schematic diagram of the structure of a power assembly and a pump cylinder body in an embodiment of an air pump based on pressure feedback self-regulation;

[0025] Figure 5 A partial cross-sectional view of a pump cylinder body in an embodiment of an air pump based on pressure feedback self-regulation;

[0026] Figure 6 An exploded view of the structure of a sealing plug and a sealing ring in an embodiment of an air pump based on pressure feedback self-regulation;

[0027] Figure 7 A schematic diagram of a pressure measuring structure in an embodiment of an air pump based on pressure feedback self-regulation;

[0028] Figure 8 A schematic diagram of the structure of a switching component in an embodiment of an air pump based on pressure feedback self-regulation;

[0029] Fig. 9 This is a structural exploded diagram of a switching component in an embodiment of an air pump that self-regulates based on pressure feedback.

[0030] In the figure: 1, outer shell; 2, operating cover; 3, pump cylinder; 301, hysteresis chamber; 302, first inner cylinder; 303, second inner cylinder; 4, first spring; 5, sealing ring; 501, inner cone; 6, sealing plug; 601, outer cone; 7, connecting rod; 8, guide wheel; 9, hinged rod; 10, eccentric wheel; 11, first bevel gear; 12, second bevel gear; 13, bracket; 14, driving device; 15, guide rod; 16 , one-way valve; 17, connecting cylinder; 18, follow-up slide; 19, telescopic shaft; 20, second spring; 21, trigger part; 2101, inclined guide surface; 22, guide plate; 2201, first straight groove; 2202, inclined groove; 2203, second straight groove; 23, operating shaft; 24, abutment wheel; 25, groove wheel; 26, sliding sleeve; 27, third spring; 28, horizontal axis; 2801, sliding connection part; 29, connecting plate. DETAILED DESCRIPTION

[0031] 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.

[0032] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0033] See also Figure 1 to Figure 9In an embodiment of the present invention, an air pump based on pressure feedback self-regulation includes: an outer shell 1, a piston plate group, a pressure measuring structure and a switching component, so that during the reciprocating action of the connecting rod 7, on the one hand, the sealing plug 6 and the sealing ring 5 can be driven to reciprocate in the first inner cylinder 302, and the pumping speed is faster at this time, so that gas can be quickly pumped into the inflated device in the initial stage of inflation to accelerate the inflation speed. On the other hand, the sealing plug 6 can be driven to reciprocate in the second inner cylinder 303, and the pumping speed is slower at this time, so that when the air pressure in the inflated device reaches a preset value, the timing of stopping the power component can be more accurately controlled to avoid overcharging of the inflated device and prevent the air tightness of the inflated device from being destroyed due to overcharging. Specifically, the outer shell 1 is provided with a pump cylinder body 3, and the pump cylinder body 3 is provided with a first inner Cylinder 302 and second inner cylinder 303, the inner diameter of the first inner cylinder 302 is larger than the inner diameter of the second inner cylinder 303, and two one-way valves 16 are further arranged on the pump cylinder body 3, and the conducting directions of the two one-way valves 16 are opposite. Specifically, the conducting direction of one of the one-way valves 16 is from the outside to the pump cylinder body 3, and the conducting direction of the other one-way valve 16 is from the pump cylinder body 3 to the outside, so that when the piston plate group reciprocates, when negative pressure is generated in the pump cylinder body 3, one of the one-way valves 16 can draw external air into the pump cylinder body 3, and when positive pressure is generated in the pump cylinder body 3, the air can be compressed and pumped into the equipment to be inflated by the other one-way valve 16. On the one hand, it can realize one-way communication of the gas and perform the inflation action, and on the other hand, it can prevent the air filled into the equipment to be inflated from flowing back, thereby increasing the inflation speed.

[0034] The piston plate group is sealingly and slidably arranged in the pump cylinder body 3, and the power component installed in the outer shell 1 can drive the piston plate group to reciprocate in the first inner cylinder 302 or the second inner cylinder 303; the piston plate group includes a coaxially arranged sealing ring 5 and a sealing plug 6, specifically, the sealing ring 5 can seal and slide in the first inner cylinder 302, and the sealing plug 6 can seal and slide in the second inner cylinder 303, an inner conical surface 501 is formed on the inner wall of the sealing ring 5, and an outer conical surface 601 is formed on the outer wall of the sealing plug 6, the inner conical surface 501 cooperates with the outer conical surface 601, and can drive the sealing ring 5 to move when the sealing plug 6 moves away from the power component; the sealing plug 6 is provided with a connecting rod 7 that passes through the pump cylinder body 3, and the connecting rod 7 is connected to the power component The pump cylinder body 3 is connected, wherein two sets of guide wheels 8 are symmetrically rotated on the outside and rollingly cooperate with the connecting rod 7. The guide wheels 8 can prevent the connecting rod 7 from being deflected when the power component drives the reciprocating motion, causing wear of the connecting rod 7 itself and wear of the sealing ring 5 and the sealing plug 6, thereby improving the sealing performance between the sealing ring 5 and the inner wall of the first inner cylinder 302, and between the sealing plug 6 and the inner wall of the second inner cylinder 303, and preventing the sealing ring 5 and the sealing plug 6 from decreasing during the reciprocating motion of the sealing ring 5 and the sealing plug 6 due to gaps caused by wear between the sealing ring 5 and the inner wall of the first inner cylinder 302, and between the sealing plug 6 and the inner wall of the second inner cylinder 303; the piston plate group also includes a plurality of retardation chambers 301 arranged in the pump cylinder body 3, and the retardation chamber 301 is provided with a first spring 4, and the first spring 4 is connected to the sealing plug 6.

[0035] In this embodiment, in the initial state, the sealing ring 5 is pulled by the first spring 4 to abut against the inner top wall of the first inner cylinder 302, and the power assembly drives the connecting rod 7 to move back and forth with a constant stroke, so that the reciprocating stroke of the sealing plug 6 connected to the connecting rod 7 is constant, and the sealing plug 6 has two position states, one of which is that the side of the sealing plug 6 facing the connecting rod 7 is coplanar with the inner top wall of the first inner cylinder 302, at which time the outer conical surface 601 on the sealing plug 6 and the inner conical surface 501 on the sealing ring 5 are in a fitted state, so that when the connecting rod 7 drives the sealing plug 6 away from the power assembly, the sealing plug 6 can drive the sealing ring 5 to move away from the inner top wall of the first inner cylinder 302, so that the first spring 4 is stretched and the air in the pump cylinder body 3 can be compressed to perform the inflation action. Conversely, when the sealing plug 6 moves in the reverse direction, the first spring 4 can release the elastic potential energy, so that the sealing ring 5 can follow the sealing plug 6 to move in the reverse direction to draw external air into the pump cylinder body 3. Since the inner diameter of the first inner cylinder 302 is larger, the gas pumped into the device to be inflated is faster at this time, so that the gas can be quickly inflated into the device to be inflated in the initial stage of inflation, thereby increasing the inflation speed.

[0036] The second is: the side of the sealing plug 6 facing the connecting rod 7 is in contact with the inner top wall of the second inner cylinder 303. At this time, when the connecting rod 7 drives the sealing plug 6 away from the power component, the sealing plug 6 can also compress the air in the pump cylinder body 3 and perform a compression action. However, since the inner diameter of the second inner cylinder 303 is smaller than that of the first inner cylinder 302, the speed of the gas pumped into the device to be inflated is slower in this state. At this time, when the air pressure in the device to be inflated reaches the preset value, the timing of stopping the power component can be more accurately controlled.

[0037] It should be noted that the lengths of the first inner cylinder 302 and the second inner cylinder 303 are greater than the stroke of the power assembly driving the connecting rod 7 to perform reciprocating motion.

[0038] Through the above arrangement, during the reciprocating movement of the connecting rod 7, on the one hand, the sealing plug 6 and the sealing ring 5 can be driven to reciprocate in the first inner cylinder 302. At this time, the air pumping speed is faster, so that gas can be quickly pumped into the inflated device in the initial stage of inflation to accelerate the inflation speed. On the other hand, the sealing plug 6 can be driven to reciprocate in the second inner cylinder 303. At this time, the air pumping speed is slower, so that when the air pressure in the inflated device reaches a preset value, the timing of stopping the power component can be more accurately controlled to avoid overcharging of the inflated device and prevent the air tightness of the inflated device from being destroyed due to overcharging.

[0039] See also Figure 2~Figure 4 The power assembly includes a guide rod 15 connected to the pump cylinder body 3, and the end of the guide rod 15 away from the pump cylinder body 3 is connected to a bracket 13, and a driving device 14 is fixedly installed on the bracket 13, and the output shaft of the driving device 14 is connected to the eccentric wheel 10 arranged on the bracket 13 through a bevel gear set; a hinge rod 9 is rotatably installed at the eccentric position of the eccentric wheel 10, and the hinge rod 9 is rotatably connected to the connecting rod 7, wherein the bevel gear set includes a first bevel gear 11 rotatably installed on the bracket 13 and a second bevel gear 12 connected to the output shaft of the driving device 14, the first bevel gear 11 is meshed with the second bevel gear 12, and the circumferential radius of the second bevel gear 12 is smaller than the circumferential radius of the first bevel gear 11.

[0040] During the inflation process, the driving device 14 can drive the second bevel gear 12 to rotate, and the first bevel gear 11 meshing with the second bevel gear 12 rotates. At this time, the eccentric wheel 10 makes a circular motion, and drives the connecting rod 7 to reciprocate along its own length direction through the hinge rod 9 to make the sealing plug 6 move. Among them, since the circumferential radius of the second bevel gear 12 is smaller than the circumferential radius of the first bevel gear 11, it has the effect of reducing the torque, and the output torque of the driving device 14 is smaller, thereby improving the durability of the driving device 14.

[0041] See also Figure 2~Figure 3 , Figure 7 The pressure measuring structure is connected to the air supply pipe arranged on the pump cylinder body 3, and a trigger part 21 is arranged on the pressure measuring structure; the pressure measuring structure includes a connecting cylinder body 17 connected to the air supply pipe, a pressure gauge is arranged on the connecting cylinder body 17, and a follower slide 18 is sealingly and slidably installed in the connecting cylinder body 17, a telescopic shaft 19 passing through the connecting cylinder body 17 is fixed on the follower slide 18, and the telescopic shaft 19 and the trigger part 21 are integrally formed; two inclined guide surfaces 2101 are symmetrically arranged on the trigger part 21; a second spring 20 is also sleeved on the telescopic shaft 19, one end of the second spring 20 is connected to the follower slide 18, and the other end is connected to the inner wall of the connecting cylinder body 17.

[0042] In the initial state, the second spring 20 is in a compressed state, at which time the follower slide 18 is in contact with a side wall of the connecting cylinder 17, and the side wall is connected to the air supply pipe through a conduit. As the air is inflated into the device to be inflated, the pressure in the air supply pipe will gradually increase (the air supply pipe is connected to the device to be inflated, so that the internal pressures of the two are consistent). Under the action of the pressure, the follower slide 18 will move, compressing the second spring 20 while causing the trigger part 21 to move toward the switching component. When the pressure in the device to be inflated reaches a predetermined value, the trigger part 21 triggers the switching component to move, thereby changing the position of the sealing plug 6 so that when the sealing plug 6 moves, it can be inflated at a lower inflation speed. Based on this, rapid switching of the inflation speed can be achieved to prevent overcharging of the device to be inflated.

[0043] It should also be noted that the above-mentioned measured value represents the critical value for switching the inflation speed. When the pressure in the device to be inflated reaches the measured value, the trigger unit 21 can cooperate with the switching component to execute the switching of the inflation speed. The above-mentioned preset value represents the value of the internal pressure after the inflation of the device to be inflated is completed. After reaching this value, the drive device 14 should be controlled to stop working immediately to prevent overcharging.

[0044] See also Figure 2~Figure 3 , Figure 7~Figure 9 The switching component connects the power component and the pump cylinder body 3. When the pressure in the air supply pipe reaches a predetermined value, the trigger part 21 cooperates with the switching component to enable the pump cylinder body 3 to move relative to the power component, thereby causing the piston plate group to reciprocate in the second inner cylinder 303; the switching component includes: a guide plate 22 and an energy storage structure.

[0045] The guide plate 22 is installed on the pump cylinder body 3, and a two-way locking groove is arranged on the guide plate 22. The two-way locking groove includes two groups of inclined grooves 2202 symmetrically arranged on the guide plate 22, and the head and tail ends of the inclined grooves 2202 are respectively connected with the first straight groove 2201 and the second straight groove 2203; along the head and tail directions of the inclined grooves 2202, the distance between the two groups of inclined grooves 2202 gradually decreases; when the energy storage structure is engaged with the first straight groove 2201 and the second straight groove 2203, the stability of the bracket 13 can be guaranteed, and during the operation of the sealing plug 6 and the sealing ring 5, the negative pressure effect can be avoided to cause the bracket 13 to change its position, thereby causing the problem of reduced pump air volume.

[0046] The energy storage structure is connected to the bracket 13 via a connecting plate 29, and a coaxial wheel group capable of rolling in the bidirectional locking groove is provided on the energy storage structure. When the trigger part 21 cooperates with the coaxial wheel group, the energy storage structure can move along the length direction of the bidirectional locking groove; the energy storage structure includes a transverse axis 28 provided on the guide plate 22, the transverse axis 28 is connected to the connecting plate 29, and a sliding connection part 2801 is provided at the end of the transverse axis 28, and the sliding connection part 2 801 is slidably connected to the guide plate 22; two sliding sleeves 26 are symmetrically slidably installed on the transverse shaft 28, an operating shaft 23 is fixed on the sliding sleeve 26, a groove wheel 25 and an abutment wheel 24 are rotatably installed on the operating shaft 23, and the operating shaft 23, the groove wheel 25 and the abutment wheel 24 form the coaxial wheel set; a third spring 27 is also sleeved on the transverse shaft 28, one end of the third spring 27 is connected to the end of the transverse shaft 28, and the other end is connected to the sliding sleeve 26.

[0047] In the initial state, the third spring 27 is in a compressed state, and the groove wheel 25 is at the end of the first straight groove 2201 away from the inclined groove 2202. At this time, the groove wheel 25 cooperates with the first straight groove 2201 to achieve the position locking of the bracket 13, and when the sealing plug 6 reciprocates, the sealing plug 6 and the sealing ring 5 can reciprocate in the first inner cylinder 302 and operate at the maximum pumping speed. When the pressure in the inflatable device reaches a predetermined value, the trigger part 21 will abut against the abutment wheel 24, and with the action of the trigger part 21, the abutment wheel 24 will cooperate with the inclined guide surface 2101, so that the abutment wheel 24 drives the groove wheel 25 to move along the length direction of the first straight groove 2201 toward the head end of the inclined groove 2202, until the groove wheel 25 moves to the head end of the inclined groove 2202. Afterwards, since the distance between the two groups of inclined grooves 2202 gradually decreases along the head and tail directions of the inclined grooves 2202, the third spring 27 can release its elastic potential energy and move along the inclined grooves 2202. At this time, the horizontal axis 28 can move along the length direction of the guide plate 22 under the guidance of the sliding connection part 2801. At the same time, the horizontal axis 28 drives the bracket 13 to move away from the pump cylinder body 3 through the connecting plate 29, and when the groove wheel 25 moves to the tail end of the inclined groove 2202, the groove wheel 25 will enter the second straight groove 2203 again, and with the cooperation of the groove wheel 25 and the second straight groove 2203, the bracket 13 is locked again. At this time, when the connecting rod 7 drives the sealing plug 6 to reciprocate, the sealing plug 6 can only reciprocate in the second inner cylinder 303 and run at the minimum pump air speed.

[0048] Through the above-mentioned arrangement, on the one hand, the bracket 13 can maintain good stability under the two pumping speeds, avoiding displacement of the bracket 13 during the process of the reverse movement of the sealing plug 6 and the sealing ring 5 to form a negative pressure, thereby reducing the pumping volume and ensuring stable pumping. On the other hand, through the cooperation of the groove wheel 25 and the inclined groove 2202, the bracket 13 can be driven to switch its position through the connecting plate 29, thereby realizing the switching of the two pumping speeds, further preventing the equipment from being overcharged due to an error in the timing of stopping the control drive device 14 when the pressure in the inflatable equipment reaches the preset value.

[0049] It should be noted that an operating cover 2 is slidably mounted on the outer shell 1. After inflation is completed, the operating cover 2 is opened to drive the two sets of operating shafts 23 to move in opposite directions, so that the bracket 13 can be reset, thereby facilitating the above steps to be repeated the next time inflation is performed.

[0050] As an embodiment of the present invention, a method for self-regulating air pump pressure feedback is also proposed, which is applied to the air pump based on self-regulating pressure feedback, and comprises the following steps:

[0051] Step 1: Connect the air supply pipe to the equipment to be inflated;

[0052] Step 2: Start the power assembly, which drives the piston plate assembly to reciprocate in the first inner cylinder 302 to pump air into the device to be inflated;

[0053] Step 3: As the air pressure in the device to be inflated increases, the pressure measuring structure is activated, and the trigger unit 21 is activated. When the pressure in the device to be inflated reaches a predetermined value, the trigger unit 21 triggers the switching component to operate.

[0054] Step 4: When the switching assembly is in action, the pump cylinder body 3 is driven to move away from the power assembly, so that the piston plate assembly moves in the second inner cylinder 303, thereby reducing the inflation speed;

[0055] Step 5: When the air pressure of the device to be inflated reaches a preset value, the power component is controlled to stop working.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air pump based on pressure feedback self-regulation, characterized in that: include: An outer shell (1), wherein a pump cylinder body (3) is arranged inside the outer shell (1), wherein a first inner cylinder (302) and a second inner cylinder (303) are arranged inside the pump cylinder body (3), wherein the inner diameter of the first inner cylinder (302) is larger than the inner diameter of the second inner cylinder (303); a piston plate group, which is sealingly slidably arranged inside the pump cylinder body (3), and a power component installed in the outer shell (1) is capable of driving the piston plate group to reciprocate in the first inner cylinder (302) or the second inner cylinder (303); a pressure measuring structure, The pressure measuring structure is provided with a trigger unit (21), a switching assembly connected to the power assembly and the pump cylinder body (3), and when the pressure in the air supply pipe reaches a predetermined value, the trigger unit (21) cooperates with the switching assembly to enable the pump cylinder body (3) to move relative to the power assembly, thereby causing the piston plate assembly to reciprocate in the second inner cylinder (303); the piston plate assembly includes a sealing ring (5) and a sealing plug (6) arranged coaxially, the sealing ring (5) and the sealing plug (6) being arranged coaxially with each other. The plug (6) is provided with a connecting rod (7) penetrating the pump cylinder body (3), and the connecting rod (7) is connected to the power assembly; the piston plate assembly also includes a plurality of hysteresis chambers (301) arranged in the pump cylinder body (3), and a first spring (4) is arranged in the hysteresis chamber (301), and the first spring (4) is connected to the sealing plug (6); the power assembly includes a guide rod (15) connected to the pump cylinder body (3), and the guide rod (15) is away from a portion of the pump cylinder body (3). The end of the pump is connected to a bracket (13), a driving device (14) is fixedly mounted on the bracket (13), and an output shaft of the driving device (14) is connected to an eccentric wheel (10) arranged on the bracket (13) through a bevel gear set; a hinged rod (9) is rotatably mounted at an eccentric position of the eccentric wheel (10), and the hinged rod (9) is rotatably connected to the connecting rod (7); the switching assembly comprises: a guide plate (22) mounted on the pump cylinder body (3), and a bidirectional locking groove is provided on the guide plate (22); An energy storage structure is connected to the bracket (13) via a connecting plate (29), the energy storage structure being provided with a coaxial wheel set capable of rolling in the bidirectional locking groove, and when the trigger portion (21) cooperates with the coaxial wheel set, the energy storage structure is capable of moving along the length direction of the bidirectional locking groove.

2. The air pump based on pressure feedback self-regulation according to claim 1, characterized in that: An inner conical surface (501) is formed on the inner wall of the sealing ring (5), and an outer conical surface (601) is formed on the outer wall of the sealing plug (6); the inner conical surface (501) cooperates with the outer conical surface (601) to drive the sealing ring (5) to move when the sealing plug (6) moves away from the power assembly.

3. The air pump based on pressure feedback self-regulation according to claim 1, characterized in that: The pressure measuring structure comprises a connecting cylinder (17) connected to the air supply pipe, a follower slide plug (18) is sealingly and slidably mounted inside the connecting cylinder (17), a telescopic shaft (19) penetrating the connecting cylinder (17) is fixed to the follower slide plug (18), and the telescopic shaft (19) and the trigger part (21) are integrally formed; two inclined guide surfaces (2101) are symmetrically arranged on the trigger part (21); a second spring (20) is also sleeved on the telescopic shaft (19), one end of the second spring (20) is connected to the follower slide plug (18), and the other end is connected to the inner wall of the connecting cylinder (17).

4. The air pump based on pressure feedback self-regulation according to claim 1, characterized in that: The bidirectional locking groove comprises two groups of inclined grooves (2202) symmetrically arranged on the guide plate (22), the head and tail ends of the inclined grooves (2202) being respectively connected to a first straight groove (2201) and a second straight groove (2203); along the head and tail directions of the inclined grooves (2202), the distance between the two groups of inclined grooves (2202) gradually decreases.

5. The air pump based on pressure feedback self-regulation according to claim 1, characterized in that: The energy storage structure comprises a transverse shaft (28) arranged on the guide plate (22), the transverse shaft (28) being connected to the connecting plate (29), and a sliding connection portion (2801) being arranged at the end of the transverse shaft (28), and the sliding connection portion (2801) being slidingly connected to the guide plate (22); two sliding sleeves (26) are also symmetrically and slidingly mounted on the transverse shaft (28), an operating shaft (23) being fixed on the sliding sleeve (26), a groove wheel (25) and an abutment wheel (24) being rotatably mounted on the operating shaft (23), and the operating shaft (23), the groove wheel (25) and the abutment wheel (24) forming the coaxial wheel set; a third spring (27) is also sleeved on the transverse shaft (28), one end of the third spring (27) being connected to the end of the transverse shaft (28), and the other end being connected to the sliding sleeve (26).

6. A method for self-regulating air pump pressure feedback, characterized in that: The air pump based on pressure feedback self-regulation as claimed in claim 1 comprises the following steps: Step 1: Connect the air supply pipe to the equipment to be inflated; Step 2: starting the power assembly, which drives the piston plate assembly to reciprocate in the first inner cylinder (302) to pump air into the device to be inflated; Step three: as the air pressure in the device to be inflated increases, the pressure measuring structure is activated, and the triggering part (21) is activated, and when the pressure in the device to be inflated reaches a predetermined value, the triggering part (21) triggers the switching component to operate; Step 4: When the switching assembly is in action, the pump cylinder body (3) is driven to move away from the power assembly, so that the piston plate assembly moves in the second inner cylinder (303) and the inflation speed is reduced; Step 5: When the air pressure of the device to be inflated reaches a preset value, the power component is controlled to stop working.

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