Dual-motor driven air pump and control method thereof

Abstract

The application discloses a double-motor-driven air pump and a control method thereof, and the control method comprises the following steps: obtaining a target load of the double-motor-driven air pump; determining whether the target load is less than or equal to a maximum load that can be driven by a first driving motor; starting the first driving motor, stopping a second driving motor, and controlling a telescopic shaft to contract so that a movable end of a pawl is separated from a transmission boss; determining whether the target load is greater than the maximum load that can be driven by the first driving motor; controlling the telescopic shaft to expand so that the movable end of the pawl is engaged with the transmission boss, and starting the first driving motor and the second driving motor at the same time. The technical scheme of the application is beneficial to realize large-span power supply, and reduces the requirements on the first driving motor and the second driving motor.

Description

Technical Field

[0001] The present invention relates to the field of inflation technology, and in particular to a dual-motor driven air pump and a control method thereof. Background Art

[0002] An air pump, also known as an "air pump," is a device that removes or adds air from an enclosed space. Air pumps are primarily divided into electric, manual, and foot-operated air pumps. Electric air pumps are electrically powered, continuously compressing air to generate pressure. They are primarily used for pumping, sewage treatment, electroplating, and aeration of biogas tanks.

[0003] Currently, air pumps for different applications have different output loads. For example, the air pressures required for aerating a biogas tank differ from those required for pumping gas, and the motor-driven pistons exert different loads. This wide range of motor loads is caused by the varying air pressures required when using an air pump in different applications, placing greater demands on the motor's output load. However, current air pumps are structurally inefficient and cannot provide power over such a wide range. Summary of the Invention

[0004] The main purpose of the present invention is to propose a dual-motor driven air pump, aiming to solve the technical problem that the output load of the inflation air pump cannot be adjusted.

[0005] To achieve the above objectives, the dual-motor driven air pump proposed in the present invention comprises:

[0006] A mounting base, an inflation component, a first drive motor and a second drive motor, wherein the inflation component is used for inflation and is disposed on the mounting base, the inflation component comprising a cylinder and a piston with one end slidably disposed inside the cylinder; the first drive motor and the second drive motor are both mounted on the mounting base;

[0007] A ratchet assembly, comprising a ratchet outer ring, a ratchet inner ring, a pawl and a solenoid valve, wherein the ratchet outer ring is connected to the first drive motor so that the first drive motor can drive the ratchet outer ring to rotate, the ratchet outer ring having a transmission cavity, the inner cavity wall of the transmission cavity having a transmission boss; the ratchet inner ring is rotatably disposed in the transmission cavity, and the ratchet inner ring is connected to the second drive motor so that the second drive motor can drive the ratchet inner ring and the ratchet outer ring to rotate coaxially; one end of the pawl is rotatably connected to the ratchet inner ring, and the other end is a movable end; the solenoid valve is mounted on the ratchet inner ring, and the telescopic shaft of the solenoid valve is rotatably connected to the movable end of the pawl; so that the solenoid valve can control the movable end of the pawl to engage or disengage with the transmission boss;

[0008] The control method of the dual-motor driven air pump includes:

[0009] Obtain the target load of the dual-motor driven air pump;

[0010] Determining that the target load is less than or equal to the maximum load that the first drive motor can drive; turning on the first drive motor, turning off the second drive motor, and controlling the telescopic shaft to retract so that the movable end of the pawl is disengaged from the transmission boss;

[0011] Determine that the target load is greater than the maximum load that the first drive motor can drive; control the telescopic shaft to extend so that the movable end of the pawl engages with the transmission boss, and simultaneously turn on the first drive motor and the second drive motor.

[0012] Optionally, after the steps of turning on the first drive motor, turning off the second drive motor, and controlling the telescopic shaft to retract so that the movable end of the pawl is disengaged from the transmission boss, the method further includes:

[0013] Get the current required load;

[0014] Determining that the currently required load is greater than the maximum load that can be driven by the first drive motor;

[0015] Get the current speed of the ratchet;

[0016] Turning on the second drive motor to increase the rotational speed of the ratchet inner ring to a speed equivalent to the current rotational speed;

[0017] The telescopic shaft is controlled to extend so that the movable end of the pawl engages with the transmission boss, so that the first drive motor and the second drive motor can act on the outer ring of the ratchet together.

[0018] Optionally, after the step of obtaining the current rotation speed of the ratchet, the method further includes:

[0019] comparing the current speed with a preset speed;

[0020] Determining that the current rotational speed is less than or equal to a preset rotational speed, turning on the second drive motor to increase the rotational speed of the ratchet inner ring to a speed equivalent to the current rotational speed;

[0021] It is determined that the current rotational speed is greater than the preset rotational speed, and the rotational speed of the first drive motor is reduced to reduce the rotational speed of the ratchet outer ring to less than or equal to the preset rotational speed.

[0022] Optionally, a hinge pin is provided at the movable end, and a hinge cylinder is provided at the end of the telescopic shaft away from the solenoid valve, the hinge cylinder forms an angle with the telescopic shaft, the hinge cylinder has a hinge cavity, and the hinge cavity and the hinge pin are rotatably matched, so that when the solenoid valve drives the telescopic shaft to perform telescopic movement, the hinge pin can rotate in the hinge cavity.

[0023] Optionally, the dual-motor driven air pump further comprises a tension spring, one end of the tension spring being connected to the movable end, and the other end being connected to the inner ring of the ratchet, so that the tension spring can drive the movable end to move toward the inner ring of the ratchet.

[0024] Optionally, the dual-motor driven air pump further comprises a transmission belt and a pulley, wherein the pulley is arranged on the output shaft of the first drive motor;

[0025] A belt groove is provided on the outer peripheral wall of the ratchet outer ring, and the transmission belt is sleeved on the belt pulley and the belt groove.

[0026] Optionally, the transmission boss has an abutment surface;

[0027] The pawl includes a pawl body and the movable end located at one end of the pawl body. The movable end has a top-butting surface, and the top-butting surface is in surface contact with the abutting surface.

[0028] Optionally, the movable end has a sliding surface connected to the abutting surface, the sliding surface faces the cavity wall of the transmission cavity, and the sliding surface is arranged in a convex arc surface.

[0029] Optionally, the piston includes a movable rod and a piston head, the piston head is slidably disposed in the internal space of the cylinder body, one end of the movable rod is rotatably connected to one end of the piston head, and the other end is rotatably connected to the outer ring of the ratchet.

[0030] Optionally, the ratchet outer ring and the ratchet inner ring are arranged concentrically.

[0031] To achieve the above-mentioned objectives, the present invention also proposes a dual-motor driven air pump, wherein the dual-motor driven air pump includes a memory, a processor, and a control method for implementing the dual-motor driven air pump stored in the memory, wherein the memory is used to store a program for implementing the control method for the dual-motor driven air pump; the processor is used to execute the program for implementing the control method for the dual-motor driven air pump to implement the steps of the above-mentioned control method for the dual-motor driven air pump.

[0032] 5. The control method of the dual-motor driven air pump of the present invention comprises the following steps: arranging an inflatable assembly, a first drive motor, a second drive motor and a ratchet assembly on a mounting base; the inflatable assembly is used for inflating; the first drive motor and the second drive motor are used for driving the inflatable assembly to inflate; and the ratchet assembly is used for transmitting the driving load of the first drive motor and the second drive motor to the inflatable assembly. When controlling the operation of the dual-motor driven air pump, first

[0033] The target load is obtained and compared with the maximum drive load of the first drive motor. When the target load is greater than the maximum drive load of the first drive motor, the telescopic shaft of the solenoid valve is controlled to extend, causing the movable end of the pawl to engage with the transmission boss. At the same time, the first drive motor and the second drive motor are controlled to work together, so that the first drive motor and the second drive motor can jointly drive the outer ring of the ratchet to rotate, and the outer ring of the ratchet drives the inflation assembly to operate. When the target load is less than or equal to the maximum drive load of the first drive motor, the telescopic shaft of the solenoid valve is controlled to retract, causing the movable end of the pawl to disengage from the transmission boss. The first drive motor is then controlled to drive the outer ring of the ratchet to rotate. In this way, the movable end of the pawl is prevented from contacting the outer ring of the ratchet, thereby preventing wear on the movable end and the transmission boss when the outer ring of the ratchet rotates at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of a dual-motor driven air pump from one perspective showing a control method for the dual-motor driven air pump according to the present invention;

[0036] Figure 2 This is a schematic diagram of the assembly structure of the ratchet assembly of the control method for the dual-motor driven air pump of the present invention;

[0037] Figure 3 Schematic diagram of the exploded structure of the ratchet assembly of the control method for the dual-motor driven air pump of the present invention;

[0038] Figure 4 Schematic diagram of the assembly structure of the pawl and solenoid valve of the ratchet assembly of the control method for the dual-motor driven air pump of the present invention;

[0039] Figure 5 This is a structural schematic diagram of a ratchet assembly according to an embodiment of a control method for a dual-motor driven air pump of the present invention;

[0040] Figure 6 for Figure 5 A magnified view of the structure at position Ⅰ in the middle.

[0041] Figure 7 This is a schematic structural diagram of the ratchet inner ring in an embodiment of a control method for a dual-motor driven air pump according to the present invention;

[0042] Figure 8 This is a schematic diagram of the assembly structure of the pawl and the solenoid valve in the control method of the dual-motor driven air pump of the present invention;

[0043] Figure 9 This is a schematic diagram of the exploded structure of the pawl and solenoid valve in the control method of the dual-motor driven air pump of the present invention;

[0044] Figure 10 A schematic structural diagram of a pawl from one perspective in a control method for a dual-motor driven air pump according to the present invention;

[0045] Figure 11 This is a schematic structural diagram of a ratchet according to an embodiment of a control method for a dual-motor driven air pump of the present invention;

[0046] Figure 12 This is a structural schematic diagram of the solenoid valve in the control method of the dual-motor driven air pump of the present invention.

[0047] Description of Figure Numbers:

[0048] Label name Label name Label name 1 Mounting Block 414 Card space 4314 Rotating end 2 Inflatable components 42 ratchet inner ring 432 Articulated shaft 21 cylinder block 421 Transmission steps 44 solenoid valve 22 piston 4211 concave arc surface 441 Telescopic shaft 31 First drive motor 43 pawl 442 Articulated cylinder 4 Ratchet assembly 430 Pawl body 51 Drive belt 41 Ratchet outer ring 431 Activity terminal 52 pulley 411 Transmission boss 4311 Top surface 6 Cam 412 contact surface 4312 sliding surface 7 bearings 413 belt groove 4313 Convex surface

[0049] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] The present invention provides a control method for a dual-motor driven air pump.

[0054] In the embodiment of the present invention, Figures 1 to 12 As shown, the dual-motor driven air pump includes:

[0055] A mounting base 1, an inflatable component 2, a first drive motor 31, and a second drive motor 32. The inflatable component 2 is used for inflation and is disposed on the mounting base 1. The inflatable component 2 includes a cylinder 21 and a piston 22 with one end slidingly disposed inside the cylinder 21. The first drive motor 31 and the second drive motor 32 are both mounted on the mounting base 1.

[0056] The ratchet assembly 4 includes a ratchet outer ring 41, a ratchet inner ring 42, a pawl 43 and a solenoid valve 44. The ratchet outer ring 41 is connected to the first drive motor 31 so that the first drive motor 31 can drive the ratchet outer ring 41 to rotate. The ratchet outer ring 41 has a transmission cavity, and the inner cavity wall of the transmission cavity has a transmission boss 411; the ratchet inner ring 42 is rotatably arranged in the transmission cavity, and the ratchet inner ring 42 is connected to the second drive motor 32 to The second drive motor 32 is configured to drive the ratchet inner ring 42 and the ratchet outer ring 41 to rotate coaxially. One end of the pawl 43 is rotatably connected to the ratchet inner ring 42, and the other end is a movable end 431. The solenoid valve 44 is mounted on the ratchet inner ring 42, and a telescopic shaft 441 of the solenoid valve 44 is rotatably connected to the movable end 431 of the pawl 43. The solenoid valve 44 can control the movable end 431 of the pawl 43 to engage or disengage with the transmission boss 411.

[0057] The control method of the dual-motor driven air pump includes:

[0058] Obtain the target load of the dual-motor driven air pump;

[0059] Determine that the target load is less than or equal to the maximum load that the first drive motor 31 can drive; turn on the first drive motor 31, turn off the second drive motor 32, and control the telescopic shaft 441 to retract so that the movable end 431 of the pawl 43 is disengaged from the transmission boss 411;

[0060] Determine that the target load is greater than the maximum load that the first drive motor 31 can drive; control the telescopic shaft 441 to extend so that the movable end 431 of the pawl 43 engages with the transmission boss 411, and simultaneously turns on the first drive motor 31 and the second drive motor 32.

[0061] Specifically, in this embodiment, the dual-motor driven air pump can take many forms, which will be described by taking a mounting base 1, an inflation component 2, a first drive motor 31, a second drive motor 32 and a ratchet component 4 as an example. The mounting base 1 is used to mount the inflation component 2, the first drive motor 31, the second drive motor 32 and the ratchet component 4. The overall shape of the mounting base 1 can be various, such as an overall L-shape, a rectangle, etc. This embodiment will be described by taking an L-shape as an example. The inflation component 2 is used to generate air pressure for use by air-using equipment, which includes automobile tires, pneumatic motors, aeration equipment, cylinders, etc. The inflation component 2 includes a cylinder body 21 and a piston 22. The cylinder body 21 has an air compression chamber, and one end of the piston 22 is movably arranged in the air compression chamber so that the piston 22 can compress air in the air compression chamber. The first drive motor 31 and the second drive motor 32 can be motors with the same speed but different output powers. The first drive motor 31 and the second drive motor 32 can also be motors with the same speed and the same power. In this embodiment, the first drive motor 31 and the second drive motor 32 have the same speed but different output powers. The first drive motor 31 and the second drive motor 32 can rotate clockwise or counterclockwise, but the rotation directions of the first drive motor 31 and the second drive motor 32 need to be set to the same. The driving load of the second drive motor 32 is greater than the driving load of the first drive motor 31. The driving load of the second drive motor 32 can be four times, six times, eight times, ten times, etc. greater than the driving load of the first drive motor 31, depending on actual needs. The first drive motor 31 and the second drive motor 32 are both mounted on the mounting base 1 to drive the piston 22 to move in the cylinder body 21.

[0062] The ratchet assembly 4 is used to drive the piston 22 to move in the cylinder 21. The ratchet assembly 4 comprises a ratchet outer ring 41, a ratchet inner ring 42, a pawl 43 and a solenoid valve 44. The ratchet outer ring 41 is circularly arranged and rotatably arranged on the mounting base 1. In order to reduce the friction, the ratchet outer ring 41 is rotatably arranged on the mounting base 1 through a bearing. The ratchet outer ring 41 is connected with the first driving motor 31. The ratchet outer ring 41 is rotatably connected with the end of the piston 22 away from the cylinder 21. Thus, the first driving motor 31 can drive the piston 22 to move in the cylinder 21 through the ratchet outer ring 41. Thus, when the first driving motor 31 drives the inflation assembly to work, the inflation assembly can provide a small air pressure to meet the demand of the small air pressure. There are various ways for the first driving motor 31 to drive the ratchet outer ring 41, for example, through a gear, a transmission belt 51, a transmission chain and the like. For example, when the first driving motor 31 drives the ratchet outer ring 41 to rotate through the gear, the outer peripheral wall of the ratchet outer ring 41 is provided with a transmission tooth. The first driving motor 31 is in transmission engagement with the transmission tooth through the gear to drive the ratchet outer ring 41 to rotate. When the first driving motor 31 drives the ratchet outer ring 41 to rotate through the transmission belt 51, the outer peripheral wall of the ratchet outer ring 41 is provided with a belt groove 413. The output shaft of the first driving motor 31 is provided with a belt pulley 52. The first driving motor 31 drives the ratchet outer ring 41 to rotate through the transmission belt 51.

[0063] The ratchet outer ring 41 is provided with a transmission cavity for mounting the ratchet inner ring 42. The inner cavity wall of the transmission cavity is provided with a transmission boss 411. The shape of the transmission boss 411 can be rectangular, square or right-angled triangular and the like. The overall shape of the ratchet inner ring 42 is circular plate. The ratchet inner ring 42 is rotatably arranged in the transmission cavity. One end of the pawl 43 is rotatably connected with the ratchet inner ring 42. The other end is a movable end 431. Thus, the movable end 431 can rotate on the ratchet inner ring 42. The solenoid valve 44 is arranged in the inner ring of the ratchet inner ring 42. The telescopic shaft 441 of the solenoid valve 44 is rotatably connected with the movable end 431. Thus, the solenoid valve 44 can drive the movable end 431 to be engaged with or disengaged from the transmission boss 411 through the telescopic shaft 441. Thus, the ratchet inner ring 42 can transmit the driving load to the ratchet outer ring 41 through the pawl 43. Then the driving load is transmitted to the piston 22 through the ratchet outer ring 41. Thus, the double-motor driven air pump can provide a large air pressure to meet the demand of the large air pressure. In addition, the solenoid valve 44 can control the telescopic shaft 441 to drive the movable end 431 to be engaged with or disengaged from the transmission boss 411. Thus, the movable end 431 and the transmission boss 411 can be prevented from colliding and being worn when the ratchet inner ring 42 is not working.

[0064] It should be noted that there are multiple pawls 43, which are spaced apart circumferentially along the outer wall of the ratchet. The number of transmission bosses 411 corresponds to the number of pawls 43, and the number of solenoid valves corresponds to the number of pawls. This reduces the force exerted on a single pawl 43 when it engages with the transmission boss 411, thereby increasing the lifespan of the ratchet assembly.

[0065] When controlling the control work of the dual-motor driven air pump, first obtain the target load of the dual-motor driven air pump. The method of obtaining the target load can be by presetting an unchangeable target load, or by manually inputting the target load before starting. For example, when a fixed target load is preset, before the dual-motor driven air pump is started, the dual-motor driven air pump can be obtained by calling the preset fixed target load. For another example, when manually inputting the target load, the operator roughly evaluates and manually inputs the target load for the dual-motor driven air pump to obtain. After the dual-motor driven air pump obtains the target load, the target load is compared with the maximum drive load of the first drive motor 31. When the target load is less than or equal to the maximum drive load of the first drive motor 31, the first drive motor 31 is started, and the power supply of the second drive motor 32 is turned off. At the same time, the electromagnetic telescopic shaft 441 is controlled to contract so that the movable end 431 of the pawl 43 is disengaged from the transmission boss 411. In this way, when only the ratchet outer ring 41 rotates, the transmission boss 411 is prevented from colliding with the movable end 431 , thereby preventing the movable end 431 and the transmission boss 411 from being worn due to the collision.

[0066] When the target load is greater than the maximum drive load of the first drive motor 31, the telescopic shaft 441 of the control electromagnetic extends, so that the movable end 431 of the pawl 43 engages with the transmission boss 411. In this way, the drive load transmitted to the ratchet inner ring 42 by the second drive motor 32 can be transmitted to the ratchet outer ring 41 through the pawl 43. When the first drive motor 31 and the second drive motor 32 work together, the first drive motor 31 and the second drive motor 32 can jointly drive the piston 22 to perform work in the cylinder 21 through the ratchet outer ring 41, thereby avoiding the problem that the cylinder 21 is overloaded and the first drive motor 31 cannot be driven alone, thereby improving the applicability of the dual-motor driven air pump.

[0067] The control method of the dual-motor driven air pump of the present invention first obtains a target load and compares the target load with the maximum drive load of the first drive motor 31. When the target load is greater than the maximum drive load of the first drive motor, the telescopic shaft 441 of the solenoid valve 44 is controlled to extend, so that the movable end 431 of the pawl 43 engages with the transmission boss 411. At the same time, the first drive motor 31 and the second drive motor 32 are controlled to work together, so that the first drive motor 31 and the second drive motor 32 can jointly drive the ratchet outer ring 41 to rotate, and drive the inflatable assembly 2 to work through the ratchet outer ring 41. In this way, the first drive motor 31 and the second drive motor 32 can jointly drive the inflatable assembly to work, so that the inflatable assembly can output a higher pressure. When the target load is less than or equal to the maximum drive load of the first drive motor, the telescopic shaft 441 of the solenoid valve 44 is controlled to retract, so that the movable end 431 of the pawl 43 disengages from the transmission boss 411. Then, the first drive motor 31 is controlled to drive the ratchet outer ring 41 to rotate. In this way, the dual-motor driven air pump can output a lower pressure. The first drive motor 31 and the second drive motor 32 drive the inflatable assembly to work through the ratchet assembly 4, which not only realizes the power supply of a large span, but also reduces the output load requirements of the first drive motor 31 and the second drive motor 32.

[0068] In some examples, such as Figures 2 to 11 As shown, after the steps of turning on the first drive motor 31, turning off the second drive motor 32, and controlling the telescopic shaft 441 to retract so that the movable end 431 of the pawl 43 is disengaged from the transmission boss 411, the method further includes: obtaining the currently required load; determining that the currently required load is greater than the maximum load that can be driven by the first drive motor 31; obtaining the current rotational speed of the ratchet; turning on the second drive motor 32 to increase the rotational speed of the ratchet inner ring 42 to a level equivalent to the current rotational speed; controlling the telescopic shaft 441 to extend so that the movable end 431 of the pawl 43 is engaged with the transmission boss 411, so that the first drive motor 31 and the second drive motor 32 can act together on the ratchet outer ring 41.

[0069] To prevent the first drive motor 31 from operating at an overload for a long time, which may damage the first drive motor 31, the load required to drive the inflatable assembly 2 can be periodically obtained. There are various ways to obtain the load required to drive the inflatable assembly 2. A pressure sensor can be installed in the cylinder 21 or a barometer can be installed at the outlet of the inflatable assembly 2. The current pressure value of the inflatable assembly 2 can be obtained through the barometer or pressure sensor. The pressure value is then converted into the current load required to drive the inflatable assembly 2. The current required load is then compared with the maximum load that can be driven by the first drive motor 31. When the current required load is greater than the maximum load that can be driven by the first drive motor 31, the speed of the ratchet outer ring 41 is obtained. The speed of the ratchet outer ring 41 can be obtained by installing a speed sensor on the ratchet outer ring 41, or by directly obtaining the speed of the first drive motor 31, etc., without specific limitations here. After obtaining the current speed of the first drive motor 31, the second drive motor 32 is turned on. When the speed of the second drive motor 32 is equivalent to the speed of the first drive motor 31, the position of the movable end 431 and the transmission boss 411 is obtained. There are various ways to obtain the position of the movable end 431 and the transmission boss 411. For example, through a position sensor or a light sensor, for example, when a light sensor is used to obtain the position of the movable end 431 and the transmission boss 411, the light sensor is respectively set at the movable end 431 and the transmission boss 411. When the rotation speed of the ratchet outer ring 41 and the ratchet inner ring 42 is the same, the position of the movable end 431 and the transmission boss 411 remains unchanged. When the rotation speed of the ratchet inner ring 42 is greater than the rotation speed of the ratchet outer ring 41, the movable end 431 approaches the transmission boss 411.

[0070] To ensure accurate engagement between the movable end 431 and the transmission boss 411, an engagement space 414 is formed between two adjacent transmission bosses. When the movable end 431 is positioned relative to the engagement space 414, the telescopic shaft 441 of the solenoid valve 44 is controlled to extend and retract, allowing the movable end 431 to enter the engagement space 414. The speed of the ratchet inner ring 42 is controlled to be greater than the speed of the ratchet outer ring, causing the movable end 431 to engage with the transmission boss 411. This reduces friction between the movable end 431 and the ratchet outer ring 41, thereby reducing wear on the pawl 43 when engaging with the transmission boss 411. After the movable end 431 of the pawl 43 engages with the transmission boss, the first drive motor 31 and the second drive motor 32 are controlled to operate normally, allowing the second drive motor 32 and the first drive motor 31 to jointly drive the ratchet outer ring 41 to rotate, thereby increasing the maximum load of the driving inflatable component 2.

[0071] In some examples, such as Figures 2 to 11As shown, after the step of obtaining the current speed of the ratchet, it also includes: comparing the current speed with the preset speed; determining that the current speed is less than or equal to the preset speed, turning on the second drive motor 32 to increase the speed of the ratchet inner ring 42 to the same as the current speed; determining that the current speed is greater than the preset speed, reducing the speed of the first drive motor 31 to reduce the speed of the ratchet outer ring 41 to less than or equal to the preset speed.

[0072] In order to quickly increase the driving load of the driving inflatable component 2, a preset speed is pre-set. The preset speed can be determined by the speed reached within a certain period of time after the second drive motor 32 is powered on, or by setting a fixed speed, etc., which is not specifically limited here. After obtaining the current speed of the ratchet outer ring 41, the current speed is compared with the preset speed. When the current speed is less than or equal to the preset speed, the second drive motor 32 is controlled to rotate. When the speed at which the second drive motor 32 drives the ratchet inner ring 42 is equivalent to the speed of the ratchet outer ring 41, the telescopic shaft 441 of the solenoid valve 44 is controlled to extend, so that the movable end 431 is engaged with the transmission boss 411, and the power of the ratchet inner ring 42 can be transmitted to the ratchet outer ring 41 through the pawl 43.

[0073] When the obtained speed of the ratchet outer ring 41 is greater than the preset speed, the first drive motor 31 is controlled to slow down until the speed of the ratchet outer ring 41 reaches the preset speed, and then the second drive motor 32 is controlled to operate. This avoids the speed mismatch between the ratchet inner ring 42 and the ratchet outer ring 41, which would cause the movable end 431 to rub against the ratchet outer ring 41 and cause damage.

[0074] In some examples, such as Figures 8 to 12 As shown, the movable end 431 is provided with a hinge pin 432.

[0075] An articulated cylinder 442 is provided at one end of the telescopic shaft 441 away from the solenoid valve 44. The articulated cylinder 4420 forms an angle with the telescopic shaft 441. The articulated cylinder 442 has a articulated cavity. The articulated cavity and the articulated pin 432 can be rotatably matched so that when the solenoid valve 44 drives the telescopic shaft 441 to perform telescopic movement, the articulated pin 432 can rotate in the articulated cavity.

[0076] In order to facilitate the rotation of the ratchet 43, the movable end 431 is provided with a hinge pin 432.

[0077] The length direction of the telescopic shaft 441 is at an angle to the length direction of the pawl 43. At the same time, a hinge cylinder 442 is provided at the end of the telescopic shaft 441 away from the electromagnetic valve 445. The hinge cylinder 442 is L-shaped after being connected to the telescopic shaft 441. The hinge cylinder 442 is provided with a hinge cavity. The hinge cavity is cylindrical. The radial direction of the hinge cavity is larger than the radial direction of the hinge pin 432. In this way, after one end of the hinge pin 432 is set in the hinge cavity, when the telescopic shaft 441 drives the pawl 43 to rotate through the hinge cylinder 442, the hinge pin 432 can rotate relative to the hinge cylinder 442, and the hinge pin 432 can rotate in the hinge cavity.

[0078] In addition, the hinge pin 432 can cooperate with the hinge cavity through the bearing 7. When the hinge pin 432 cooperates with the hinge cavity through the bearing 7, the end of the solenoid valve 44 away from the telescopic shaft 441 is hinged to the ratchet inner ring 42, so that when the solenoid valve 44 drives the telescopic shaft 441 to extend or retract, the solenoid valve 44 can rotate with the rotation of the movable end 431, preventing the telescopic shaft 440 of the solenoid valve 44 from moving vertically and being unable to rotate relative to the movable end 431, causing interference between the solenoid valve 44 and the movable end 431. In addition, it is also possible to only provide a hinge hole at the end of the telescopic shaft 441 away from the solenoid valve 44, and the hinge hole is larger than the hinge pin 432. In this way, the hinge pin 432 can cooperate with the hinge hole to achieve the purpose of hinged connection between the movable end 431 and the solenoid valve 44.

[0079] It should be noted that if Figures 2 to 11 As shown, when the movable end 431 is engaged with the transmission boss 411, in order to reduce the force strength at the connection between the pawl 43 and the ratchet inner ring 42, the ratchet inner ring 42 is provided with a transmission step 421. The transmission step 421 is used to rotate the pawl 43 when the movable end 431 is engaged with the transmission boss 411.

[0080] The moving end 4314 abuts against the transmission step 421, and the position where the rotating end 4314 of the pawl 43 abuts against the transmission step 421 is located at the corner of the transmission step 421, so that part of the force of the ratchet inner ring 42 can be transmitted to the pawl 43 through the transmission step 421, and then transmitted to the ratchet outer ring 41 by the pawl 43. In addition, in order to reduce the force strength at the connection between the pawl 43 and the ratchet inner ring 42 when the movable end 431 abuts against the transmission boss 411, a convex arc surface 4313 can be provided at the end of the rotating end 4314 of the pawl 43, and a concave arc surface 4211 can be provided on the transmission step 421. There is no specific restriction on the position of the concave arc surface 4211. It is only required that when the movable end 431 abuts against the transmission boss 411, the convex arc surface 4313 is located inside the concave arc surface 4211, and the convex arc surface 4313 fits with the concave arc surface 4211, so that the concave arc surface 4211 can transmit power to the pawl 43 through the convex arc surface 4313, and then the pawl 43 transmits it to the ratchet outer ring 41.

[0081] In some examples, the dual-motor driven air pump further includes a tension spring, one end of which is connected to the movable end 431 , and the other end of which is connected to the ratchet inner ring 42 , so that the tension spring can drive the movable end 431 to move toward the ratchet inner ring 42 .

[0082] The dual-motor driven air pump also includes a tension spring, one end of which is connected to the ratchet inner ring 42, and the other end is connected to the movable end 431. In this way, when the dual-motor driven air pump is powered off, the movable end 431 can be pulled back toward the ratchet inner ring 42 by the tension spring, thereby preventing the ratchet inner ring 42 and the ratchet outer ring 41 from rotating at different speeds when the dual-motor driven air pump is powered off, causing damage to the movable end 431.

[0083] In some examples, such as Figure 1 As shown, the dual-motor driven air pump also includes a transmission belt 51 and a pulley 52, and the pulley 52 is arranged on the output shaft of the first drive motor 31; the outer peripheral wall of the ratchet outer ring 41 is provided with a belt groove 413, and the transmission belt 51 is sleeved on the pulley 52 and the belt groove 413.

[0084] The motor-driven air pump further includes a transmission belt 51 and a pulley 52. ​​The pulley 52 is disposed on the output shaft of the first drive motor 31. A belt groove 413 is formed in the outer peripheral wall of the ratchet outer ring 41, and the transmission belt 51 is sleeved on the pulley 52 to be used in the belt groove 413. This prevents the second drive motor 32 from rotating at a different speed from the first drive motor 31, which would otherwise cause an increase in the load on the motor with the higher speed.

[0085] In some examples, such as Figures 3 to 5 As shown, the transmission boss 411 has a contact surface 412; the pawl 43 includes a pawl body 430 and the movable end 431 located at one end of the pawl body 430, and the movable end 431 has a top contact surface 4311, and the top contact surface 4311 is in contact with the contact surface 412.

[0086] The transmission boss 411 has an abutting surface 412, which can be an arc surface or a flat surface. The movable end 431 has an abutting surface 4311, which can be an arc surface or a flat surface. This embodiment is described using a flat surface as an example.

[0087] In some examples, such as Figures 3 to 11 As shown, the movable end 431 has a sliding surface 4312 connected to the abutting surface 4311 , the sliding surface 4312 faces the cavity wall of the transmission cavity, and the sliding surface 4312 is arranged in a convex arc surface.

[0088] In order to reduce the friction between the movable end 431 and the wall of the transmission chamber, the movable end 431 is provided with a sliding surface 4312 with a convex arc surface, and the sliding surface 4312 faces the wall of the transmission chamber. In this way, when the telescopic shaft 441 of the solenoid valve 44 drives the movable end 431 to move toward the transmission boss 411, the sliding surface 4312 can increase the contact with the wall of the transmission chamber, thereby reducing the significant wear of the movable end 431 caused by point contact.

[0089] In some examples, the piston 22 includes a movable rod and a piston 22 head. The piston 22 head can be slidably disposed in the internal space of the cylinder body 21. One end of the movable rod is rotatably connected to one end of the piston 22 head, and the other end is rotatably connected to the ratchet outer ring 41.

[0090] The piston 22 includes a movable rod and a piston head 22. The overall shape of the piston head 22 is cylindrical and is used to compress air. The piston rod 22 can be a round rod or a rectangular rod, etc., and there is no specific limitation here. One end of the movable rod is rotatably connected to the piston head 22. The movable rod and the piston head 22 are rotatably connected in a manner that a transfer shaft is provided on the piston head 22, a transfer hole is provided on the movable rod, and the transfer shaft and the transfer hole cooperate to achieve the purpose of rotational connection. The end of the movable rod away from the piston head 22 can be directly rotatably connected to the ratchet outer ring 41 or indirectly rotatably connected to the ratchet outer ring 41. The movable rod and the ratchet outer ring 41 are rotatably connected in a manner that a mounting shaft is provided on the ratchet outer ring 41, a mounting hole is provided on the movable rod, and the mounting shaft and the mounting hole cooperate to achieve the purpose of rotational connection.

[0091] It should be noted that in order to reduce stress concentration on the ratchet outer ring 41, the ratchet outer ring 41 is connected to the movable rod through a cam 6, and the cam 6 is fixed on one side of the ratchet outer ring 41 to prevent the ratchet outer ring 41 from being damaged due to insufficient thickness of the ratchet outer ring 41.

[0092] In some examples, the ratchet outer ring 41 and the ratchet inner ring 42 are concentrically arranged.

[0093] In order to improve the reliability of the engagement between the ratchet inner ring 42 and the ratchet outer ring 41, the ratchet inner ring 42 and the ratchet outer ring 41 are coaxially arranged, thereby avoiding unreliable engagement caused by unstable contact area of ​​the pawl 43 when the pawl 43 is engaged.

[0094] The application further provides a double-motor driven air pump, which comprises a memory, a processor and a control method for implementing the double-motor driven air pump stored in the memory. The specific structure of the control method for implementing the double-motor driven air pump is referred to the above-mentioned embodiments. Since the double-motor driven air pump adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The memory is used for storing the program for implementing the control method for implementing the double-motor driven air pump. The processor is used for executing the program for implementing the control method for implementing the double-motor driven air pump to implement the steps of the control method for implementing the double-motor driven air pump.

[0095] The above-mentioned is only the preferred embodiment of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields made under the inventive concept of the application and according to the content of the specification and drawings of the application are included in the patent protection scope of the application.

Claims

1. A control method for a dual-motor driven air pump, characterized in that: The dual-motor driven air pump comprises: A mounting base, an inflation component, a first drive motor and a second drive motor, wherein the inflation component is used for inflation and is disposed on the mounting base, the inflation component comprising a cylinder and a piston with one end slidably disposed inside the cylinder; the first drive motor and the second drive motor are both mounted on the mounting base; A ratchet assembly, comprising a ratchet outer ring, a ratchet inner ring, a pawl and a solenoid valve, wherein the ratchet outer ring is connected to the first drive motor so that the first drive motor can drive the ratchet outer ring to rotate, the ratchet outer ring having a transmission cavity, the inner cavity wall of the transmission cavity having a transmission boss; the ratchet inner ring is rotatably disposed in the transmission cavity, and the ratchet inner ring is connected to the second drive motor so that the second drive motor can drive the ratchet inner ring and the ratchet outer ring to rotate coaxially; one end of the pawl is rotatably connected to the ratchet inner ring, and the other end is a movable end; the solenoid valve is mounted on the ratchet inner ring, and the telescopic shaft of the solenoid valve is rotatably connected to the movable end of the pawl; so that the solenoid valve can control the movable end of the pawl to engage or disengage with the transmission boss; The movable end is provided with a hinge pin, and the end of the telescopic shaft away from the solenoid valve is provided with a hinge cylinder, the hinge cylinder and the telescopic shaft form an included angle, the hinge cylinder has a hinge cavity, the hinge cavity and the hinge pin are rotatably matched, so that when the solenoid valve drives the telescopic shaft to perform telescopic movement, the hinge pin can rotate in the hinge cavity; The dual-motor driven air pump further includes a tension spring, one end of the tension spring being connected to the movable end and the other end being connected to the inner ring of the ratchet, so that the tension spring can drive the movable end to move toward the inner ring of the ratchet; The dual-motor driven air pump further comprises a transmission belt and a pulley, wherein the pulley is arranged on the output shaft of the first drive motor; The outer peripheral wall of the ratchet outer ring is provided with a belt groove, and the transmission belt is sleeved on the belt pulley and the belt groove; The control method of the dual-motor driven air pump includes: Obtain the target load of the dual-motor driven air pump; Determining that the target load is less than or equal to the maximum load that the first drive motor can drive; turning on the first drive motor, turning off the second drive motor, and controlling the telescopic shaft to retract so that the movable end of the pawl is disengaged from the transmission boss; Determine that the target load is greater than the maximum load that the first drive motor can drive; control the telescopic shaft to extend so that the movable end of the pawl engages with the transmission boss, and simultaneously start the first drive motor and the second drive motor.

2. The control method of the dual-motor driven air pump according to claim 1, characterized in that: After the steps of turning on the first drive motor, turning off the second drive motor, and controlling the telescopic shaft to retract so that the movable end of the pawl is disengaged from the transmission boss, the method further includes: Get the current required load; Determining that the currently required load is greater than a maximum load that can be driven by the first drive motor; Obtaining the current rotation speed of the outer ring of the ratchet; Turning on the second drive motor to increase the rotational speed of the ratchet inner ring to a speed equivalent to the current rotational speed; The telescopic shaft is controlled to extend so that the movable end of the pawl engages with the transmission boss, so that the first drive motor and the second drive motor can act on the outer ring of the ratchet together.

3. The control method of the dual-motor driven air pump according to claim 2, characterized in that: After the step of obtaining the current rotation speed of the ratchet, the following steps are also included: comparing the current speed with a preset speed; Determining that the current rotational speed is less than or equal to a preset rotational speed, turning on the second drive motor to increase the rotational speed of the ratchet inner ring to a speed equivalent to the current rotational speed; It is determined that the current rotational speed is greater than the preset rotational speed, and the rotational speed of the first drive motor is reduced to reduce the rotational speed of the ratchet outer ring to less than or equal to the preset rotational speed.

4. The control method of a dual-motor driven air pump according to claim 1, wherein: The transmission boss has an abutment surface; The pawl includes a pawl body and the movable end located at one end of the pawl body. The movable end has a top-butting surface, and the top-butting surface is in surface contact with the abutting surface.

5. The control method of the dual-motor driven air pump according to claim 4, characterized in that: The movable end has a sliding surface connected to the abutting surface, the sliding surface faces the cavity wall of the transmission cavity, and the sliding surface is arranged in a convex arc surface.

6. The control method of a dual-motor driven air pump according to claim 4, characterized in that: The piston includes a movable rod and a piston head. The piston head is slidably arranged in the internal space of the cylinder body. One end of the movable rod is rotatably connected to one end of the piston head, and the other end is rotatably connected to the outer ring of the ratchet.

7. A dual-motor driven air pump, characterized in that: The dual-motor driven air pump includes a memory, a processor, and a control method for implementing the dual-motor driven air pump stored in the memory, wherein the memory is used to store a program for implementing the control method for the dual-motor driven air pump; The processor is used to execute a program for implementing the control method of the dual-motor driven air pump, so as to implement the steps of the control method of the dual-motor driven air pump as claimed in any one of claims 1 to 6.

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