An intelligent electric cylinder with load peak control

Abstract

The present invention discloses an intelligent electric cylinder with load peak control, which relates to the technical field of electric cylinders and includes a push rod structure composed of a transfer sleeve and two movable rods. When the push rod structure moves to the left or right direction, the transfer sleeve serves as a structural member for buffering "energy storage" or buffering "energy release" during the movement, and its purpose is to reduce the stress damage to the movable rod caused by the reaction force generated during the load process. On the basis of the above, a corresponding control system is provided, which is specifically manifested in that the pressure values ​​in the front air cavity and the rear air cavity change, and the pressure difference between the two is fed back, which is converted into a load value, and the front position difference, the rear position difference and the equal position value are further calculated according to the pressure difference. The output power in the overall structure is reversely controlled by the above three values, and its purpose is to avoid greater stress damage to the rod caused by excessive difference under the premise of ensuring the normal operation of the overall structure.

Description

Technical Field

[0001] The present invention relates to the technical field of electric cylinders, and in particular to an intelligent electric cylinder with load peak control. Background Art

[0002] The working principle of the electric cylinder is to use electricity as a direct power source, and adopt various types of motors (such as AC servo motors, stepper servo motors, DC servo motors) to drive different forms of screws (or nuts) to rotate, and convert the spiral motion between the components into the linear motion of the nut (or screw). In its actual operation process, as the rotation continues, the spiral motion is converted into linear motion as described above. The thrust or pull generated by the screw is applied to an object, causing the object to reciprocate.

[0003] In combination with the above content, for the application object of the electric cylinder, the weight (load) of the application object changes during the specific reciprocating motion process. For example, the thrust generated by the screw rod pushes the application object to move forward, and the tension generated by the screw rod pulls the application object to move reversely. Both processes will generate reaction force on the screw rod. There is a direct correlation between the reaction force and the load value. If the motor structure in the electric cylinder adopts a constant power output, it is difficult to adapt to the actual load value, and the following will occur: the application object cannot be "driven" to move, the movement fails, the reaction force generated fluctuates greatly, and the plastic deformation damage (stress damage) of the screw rod is aggravated.

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent electric cylinder with load peak control, which is used to solve the problem that the current electric cylinder is difficult to meet the changes in specific load values ​​during use, and there is a problem of mechanical movement failure or aggravated screw damage.

[0006] The object of the present invention can be achieved by the following technical scheme: an intelligent electric cylinder with load peak control, comprising a driving motor, an external sleeve, a screw, a movable sleeve and a movable rod, wherein the external sleeve is mounted on the driving motor, the screw is mounted at the output end of the driving motor, and the screw is located inside the external sleeve, the movable sleeve is threadedly connected to the screw, and the movable sleeve is slidably connected inside the external sleeve, and the number of movable rods is two, one of which is fixedly connected to the movable sleeve;

[0007] A transfer sleeve is arranged between the two movable rods, an external controller assembly is installed on the external sleeve, and the external controller assembly includes a detection component, an analysis component and a motion control component. The detection component is composed of two gas pressure sensors, and the detection component is used to collect detection data. The analysis component performs an analysis action based on the detection data to obtain analysis parameters. The motion control component controls the motion state of the drive motor based on the analysis parameters in the analysis component.

[0008] Two piston blocks are slidably installed inside the transfer sleeve, and a front air cavity and a rear air cavity are respectively arranged inside the transfer sleeve through the two piston blocks. A front air port and a rear air port are respectively installed on the upper side of the circumferential outer wall of the transfer sleeve. The front air port is connected to the front air cavity, and the rear air port is connected to the rear air cavity, and air pipes are respectively installed on the front air port and the rear air port.

[0009] It is further configured as follows: the movable rod is located at the left and right sides of the transfer sleeve, and the movable rod and the transfer sleeve are slidably connected, and the movable rod located on the right side is fixedly connected to the movable sleeve.

[0010] It is further configured as follows: a sealing ring is installed on the piston block, and a support rod is installed on the piston block, the support rod passes through the transfer sleeve and is slidably connected to the transfer sleeve, and the support rod is fixedly connected to the movable rod.

[0011] It is further configured that: the front air cavity and the rear air cavity are arranged in a direction from left to right along the length direction of the transfer sleeve, and the volumes of the front air cavity and the rear air cavity are equal;

[0012] The two air pipes are respectively connected to the conducting ends of the gas pressure sensor.

[0013] It is further configured as follows: the detection data includes pressure values ​​on two gas pressure sensors, output power of the drive motor and directional motion parameters; the pressure values ​​on the two gas pressure sensors are set as primary pressure values ​​and secondary pressure values ​​according to the distribution positions of the front air cavity and the rear air cavity; a pressure difference-load conversion formula is established in the analysis action; the output power is used as a dynamic variable, and the primary pressure value and the secondary pressure value are used as conversion variables in the pressure difference-load conversion formula; the analysis parameters are calculated; the analysis parameters are composed of a front position difference, a rear position difference and an equal position value; the front position difference is used to mark an abnormal state in the forward movement of the movable rod; the rear position difference acts on an abnormal state in the backward movement of the movable rod; and the equal position value is used to mark a stable state in the forward or backward movement of the movable rod.

[0014] It is further configured as follows: the directional motion parameters include the cross-sectional areas of the front air cavity and the rear air cavity, and the peak distance of the piston block during sliding inside the transfer sleeve; the sliding direction of the front air cavity in the transfer sleeve and the rear air cavity in the transfer sleeve is rightward or leftward.

[0015] It is further configured that: the movable rod is configured with the following movement modes according to the setting positions of the two piston blocks:

[0016] Movement mode 1: The driving motor drives the movable rod to move to the left through the screw rod and the movable sleeve. The piston block at the left position slides to the right under the reaction force of the movable rod at the left position. After the piston block at the left position slides to the right to reach the peak distance, the volume change of the front air chamber drives the piston block at the right position to continue to move to the right. The front air chamber and the rear air chamber contain the following states:

[0017] A: When the piston block at the left position has not reached the distance peak, the volume of the front air chamber becomes smaller, the volume of the rear air chamber remains unchanged, the primary pressure value increases, and the secondary pressure value remains unchanged;

[0018] B: When the piston block at the left position reaches the distance peak, the volume of the front air chamber and the rear air chamber becomes smaller, and the primary pressure value and the secondary pressure value increase;

[0019] C: After the piston block at the right position is moved to the right by the front air chamber to a peak value, the volume changes of the front air chamber and the rear air chamber reach the upper limit value, and the primary pressure value and the secondary pressure value continue to increase until they tend to a stable value;

[0020] Movement mode 2: The driving motor drives the movable rod to move to the right through the screw rod and the movable sleeve. The piston block at the right position moves to the right, and the volume of the rear air chamber becomes smaller. The piston block at the left position moves to the left, and the volume of the front air chamber becomes larger. The front air chamber and the rear air chamber include the following states:

[0021] D: The volume of the rear air cavity decreases, and the secondary pressure value increases until it reaches a stable value;

[0022] E: The volume of the front air cavity increases, and the primary pressure value decreases until it reaches the regional stable value;

[0023] Sport mode three: The primary pressure value and the secondary pressure value in sport mode one and sport mode two are sent to the pressure difference-load conversion formula respectively, and the output power of the drive motor is reversely controlled according to the equal position value, the front position difference value and the rear position difference value.

[0024] The present invention has the following beneficial effects:

[0025] The overall structure is based on the basic structure of the electric cylinder, and is mainly composed of a transfer sleeve and two movable rods to form a push rod structure in the overall structure. The push rod structure is a movable part in the loading process. When objects with different weights are moved in the left and right directions, the transfer sleeve can be used as a buffer "energy storage" or buffer "energy release" structure in the overall movement process. Its purpose is to reduce the stress damage to the movable rod caused by the reaction force generated during the loading process, and will not interfere with the movement state of the overall movable rod;

[0026] On the basis of the above, the structure of the transfer sleeve is optimized, which is specifically manifested as follows: the interior is divided into a front air chamber and a rear air chamber by two piston blocks. According to the movement state of the movable rod, the gas volume inside the front air chamber and the rear air chamber increases or decreases, thereby feeding back the change in pressure value according to the volume change. Combined with the pressure value change, a pressure difference-load conversion formula is generated. The load value is used as a relative variable constant and combined with the output power of the drive motor, so that the pressure value inside the front air chamber and the rear air chamber changes. The pressure value change is used as a direct variable in the overall conversion formula, and the front position difference, rear position difference and equal position value are used as the basis for judgment, thereby forming: based on the load value and the pressure change inside the front air chamber and the rear air chamber, the output power of the drive motor is reversely controlled. Its purpose is to maintain the overall equipment in normal operation and avoid damage to the acquisition rod caused by large stress fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 these drawings without paying creative work.

[0028] Figure 1 This is a schematic diagram of the structure of an intelligent electric cylinder with load peak control proposed by the present invention;

[0029] Figure 2 A cross-sectional view of an external sleeve component in an intelligent electric cylinder with load peak control proposed by the present invention;

[0030] Figure 3 A cross-sectional view of a movable rod component in an intelligent electric cylinder with load peak control proposed by the present invention;

[0031] Figure 4 A cross-sectional view of a transfer sleeve component in an intelligent electric cylinder with load peak control proposed by the present invention.

[0032] In the figure: 1. driving motor; 2. external sleeve; 3. external controller assembly; 4. air pipe; 401. front air port; 402. rear air port; 5. transfer sleeve; 6. movable rod; 7. movable sleeve; 8. screw rod; 9. sealing ring; 10. piston block; 1101. front air cavity; 1102. rear air cavity. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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. Embodiment 1

[0034] This embodiment is to explain the structural optimization of the overall structure of the current electric cylinder, as follows:

[0035] Reference Figures 1 to 4 In this embodiment, an intelligent electric cylinder with load peak control includes a drive motor 1, an external sleeve 2, a screw rod 8, a movable sleeve 7 and a movable rod 6. The external sleeve 2 is installed on the drive motor 1, the screw rod 8 is installed at the output end of the drive motor 1, and the screw rod 8 is located inside the external sleeve 2. The movable sleeve 7 is threadedly connected to the screw rod 8, and the movable sleeve 7 is slidably connected inside the external sleeve 2. There are two movable rods 6, and one of the movable rods 6 is fixedly connected to the movable sleeve 7.

[0036] A transfer sleeve 5 is arranged between the two movable rods 6, an external controller assembly 3 is installed on the external sleeve 2, and the external controller assembly 3 includes a detection component, an analysis component and a motion control component. The detection component is composed of two gas pressure sensors, and the detection component is used to collect detection data, the analysis component performs analysis actions based on the detection data to obtain analysis parameters, and the motion control component controls the motion state of the drive motor 1 based on the analysis parameters in the analysis component;

[0037] Two piston blocks 10 are slidably installed inside the transfer sleeve 5, and a front air chamber 1101 and a rear air chamber 1102 are respectively arranged inside the transfer sleeve 5 through the two piston blocks 10, and a front air port 401 and a rear air port 402 are respectively installed on the upper side of the circumferential outer wall of the transfer sleeve 5, the front air port 401 and the front air chamber 1101 are connected, and the rear air port 402 and the rear air chamber 1102 are connected, and air pipes 4 are respectively installed on the front air port 401 and the rear air port 402.

[0038] The movable rod 6 is located on the left and right sides of the transfer sleeve 5, and the movable rod 6 is slidably connected to the transfer sleeve 5. The movable rod 6 located on the right side is fixedly connected to the movable sleeve 7. A sealing ring 9 is installed on the piston block 10, and a support rod is installed on the piston block 10. The support rod passes through the transfer sleeve 5 and is slidably connected to the transfer sleeve 5, and the support rod is fixedly connected to the movable rod 6.

[0039] Structural advantages: The overall structure of the current electric cylinder is relatively consistent with that of the current electric cylinder: the driving motor 1 drives the lead screw 8 to rotate, and then the rotating force between the lead screw 8 and the movable sleeve 7 drives the movable sleeve 7 to move along the length direction of the lead screw 8. The difference is that the push rod structure is composed of two movable rods 6 and the transfer sleeve 5. Figure 2 The connecting structure of the movable rod 6 located at the left position during direct loading;

[0040] According to the operation mode of the electric cylinder structure, when the push rod structure provides thrust to drive the load object to move to the left, when the load object moves to the right, the push rod structure is mainly used to provide pulling force. In the above process, refer to Figure 4 To illustrate, when the two movable rods 6 move to the left or right, the two piston blocks 10 are also synchronously driven to move to the left and right;

[0041] Combining the above paragraph again, Figure 4 The position shown in the figure represents one of the modes. In the initial state, it can be understood that a cavity matching the piston block 10 is formed in the transfer sleeve 5. According to the positions of the front air port 401 and the rear air port 402, the position of the rear air port 402 corresponds to the position between the piston block 10 at the right position and the right inner wall of the air, and the front air port 401 corresponds to the position between the two piston blocks 10. The piston block 10 at the left position is not close to the left inner wall of the cavity, but there is a gap between the left inner wall of the air.

[0042] It should be noted that: the front air cavity 1101 and the rear air cavity 1102 are filled with gases of the same volume, the same substance, and the same environment. Combined with the ideal gas pressure formula: pv=nRT, where p is the gas pressure, v is the gas volume, n is the number of gas moles, R is the gas constant, and T is the thermodynamic temperature, the gas pressures in the front air cavity 1101 and the rear air cavity 1102 are equal;

[0043] Therefore, when the movable rod 6 moves, the front air chamber 1101, the rear air chamber 1102 and the piston block 10 make the overall transfer sleeve 5 form a buffer "energy storage" or buffer "energy release" structure during the movement process without interfering with the overall movement process. Embodiment 2

[0044] This embodiment is based on the technical features of the first embodiment and further explains:

[0045] The front air cavity 1101 and the rear air cavity 1102 are arranged along the length direction of the transfer sleeve 5 from left to right, and the volumes of the front air cavity 1101 and the rear air cavity 1102 are equal;

[0046] The two air pipes 4 are respectively connected to the conducting ends of the gas pressure sensor.

[0047] The detection data includes the pressure values ​​on the two gas pressure sensors, the output power of the drive motor 1 and the directional motion parameters. The pressure values ​​on the two gas pressure sensors are set as the primary pressure value and the secondary pressure value according to the distribution positions of the front air cavity 1101 and the rear air cavity 1102. A pressure difference-load conversion formula is established in the analysis action. The output power is used as the dynamic variable, and the primary pressure value and the secondary pressure value are used as the conversion variables in the pressure difference-load conversion formula to calculate the analysis parameters. The analysis parameters are composed of a front position difference, a rear position difference and an equal position value. The front position difference is used to mark the abnormal state in the forward movement of the movable rod 6, the rear position difference acts on the abnormal state in the backward movement of the movable rod 6, and the equal position value is used to mark the stable state in the forward or backward movement of the movable rod 6.

[0048] The directional motion parameters include the cross-sectional areas of the front air cavity 1101 and the rear air cavity 1102, the peak distance of the piston block 10 during sliding inside the transfer sleeve 5, and the sliding direction of the front air cavity 1101 in the transfer sleeve 5 and the rear air cavity 1102 in the transfer sleeve 5 to the right or to the left.

[0049] The movable rod 6 is provided with the following movement modes according to the setting positions of the two piston blocks 10:

[0050] Movement mode 1: the driving motor 1 drives the movable rod 6 to move to the left through the screw rod 8 and the movable sleeve 7, and the piston block 10 at the left position slides to the right side by the reaction force of the movable rod 6 at the left position. After the sliding distance of the piston block 10 at the left position to the right reaches the distance peak, the volume change of the front air chamber 1101 drives the piston block 10 at the right position to continue to move to the right side, wherein the front air chamber 1101 and the rear air chamber 1102 include the following states:

[0051] A: When the piston block 10 at the left position has not reached the distance peak, the volume of the front air chamber 1101 decreases, the volume of the rear air chamber 1102 remains unchanged, the primary pressure value increases, and the secondary pressure value remains unchanged;

[0052] B: When the piston block 10 at the left position reaches the distance peak, the volumes of the front air chamber 1101 and the rear air chamber 1102 decrease, and the primary pressure value and the secondary pressure value increase;

[0053] C: After the piston block 10 at the right position is moved to the right by the front air chamber 1101 to a peak value, the volume changes of the front air chamber 1101 and the rear air chamber 1102 reach the upper limit value, and the primary pressure value and the secondary pressure value continue to increase until they tend to a stable value;

[0054] Movement mode 2: the driving motor 1 drives the movable rod 6 to move to the right through the screw rod 8 and the movable sleeve 7, the piston block 10 located at the right position moves to the right, the volume of the rear air chamber 1102 decreases, the piston block 10 located at the left position moves to the left, the volume of the front air chamber 1101 increases, and the front air chamber 1101 and the rear air chamber 1102 include the following states:

[0055] D: The volume of the rear air cavity 1102 decreases, and the secondary pressure value increases until it reaches a stable value;

[0056] E: The volume of the front air cavity 1101 increases, and the primary pressure value decreases until it reaches the regional stable value;

[0057] Movement mode three: The primary pressure value and the secondary pressure value in movement mode one and movement mode two are sent to the pressure difference-load conversion formula respectively, and the output power of the drive motor 1 is reversely controlled according to the equal position value, the front position difference value and the rear position difference value.

[0058] Technical advantages: Combined with the description of the ideal gas pressure formula: pv=nRT in the first embodiment, combined with the front air cavity 1101 and the rear air cavity 1102, and the state of the gas injected into the two, v is the volume data of the front air cavity 1101 and the rear air cavity 1102, n is the number of gas moles of the injected gas, R is the gas constant of the injected gas, and T is the thermodynamic temperature of the injected gas. Therefore, in the initial state, the pressure values ​​detected by the gas pressure sensor in the front air cavity 1101 and the rear air cavity 1102 are equal. This is combined with the above-mentioned motion mode to illustrate:

[0059] The whole push rod structure moves to the left, and its purpose is to provide thrust to drive the object to move to the left. In the process of providing thrust, because in the initial state, the pressures in the gap between the front air cavity 1101, the rear air cavity 1102, and the piston block 10 located at the left position and the left inner wall of the cavity are equal, the initial positions of the two piston blocks 10 remain unchanged, only the piston block 10 located at the right position is firstly subjected to the thrust from the movable rod 6 on the right side, and the internal volume of the rear air cavity 1102 is maintained unchanged at first, but the thrust is provided in the opposite direction to the piston block 10 located at the left position. pressure, then the volume inside the front air chamber 1101 decreases and the pressure increases, but because it is mainly the movable rod 6 at the left position that drives the object, a "reaction force" is provided according to the gravity of the object and applied to the transfer sleeve 5, which further "deepens" the volume change inside the front air chamber 1101. On the contrary, when a pulling force is provided to drive the object to move to the right, the movable rod 6 at the right position drives the piston block 10 at the right position to move to the right, resulting in a smaller volume of the rear air chamber 1102, and the piston block 10 at the left position moves to the left, resulting in an increase in the volume of the front air chamber 1101;

[0060] The above content is the basic operating mode in this embodiment, so what needs to be further explained is: taking the load of the object as a variable, the pressure difference inside the front air cavity 1101 and the rear air cavity 1102 changes according to the change of the object load. When the object is driven by the electric cylinder, the output power of the drive motor 1 needs to change with the pressure difference to reversely control the output power of the drive motor 1. Embodiment 3

[0061] This embodiment is based on the pressure difference-load conversion formula in the second embodiment and is based on the optimized structure in the first embodiment. The following description is given:

[0062] S1: Set the primary pressure value and secondary pressure value to: and , and combined with the electric cylinder, through the push rod structure in embodiment 1 or embodiment 2, the drive motor 1 provides This output power is combined with the movable sleeve 7 and the movable rod 6 to provide thrust or pull, which provides , among which As the thrust or pull value in the push rod structure, As and The conversion formula between , this part will not be elaborated, it is just the precursor part of this embodiment, its purpose is: to drive the motor 1 to provide kinetic energy, when the push rod structure is used to push the object to move, it is necessary to ensure A load slightly larger than the object to ensure that the object can move at a constant speed;

[0063] S2: Combined with the content of the second embodiment, in the initial state, = , and convert it to pv=nRT: , among which is the total length of the front air cavity 1101 or the rear air cavity 1102, is the cross-sectional area in the front air cavity 1101 or the rear air cavity 1102, is the sliding distance in the front air cavity 1101 or the rear air cavity 1102, and According to the moving direction of the piston block 10, it is divided into positive and negative values, and the distance peak value is preset to ;

[0064] S3: It should be noted that: in the present invention, there is no need to specifically mark the load peak of the object, but the following two methods are generated according to the movement direction of the push rod structure:

[0065] Method 1: Provide thrust when the push rod structure moves to the left. If the load of the object is heavy, The object cannot be driven to move, so the movable rod 6 on the left side remains stationary, and the movable rod 6 on the right side moves to the right, causing the transfer sleeve 5 to move to the left relative to the movable rod 6 on the left side. , until the piston block 10 on the left side is driven to move to the right side , and because the right movable rod 6 drives the piston block 10 at the right position to move to the left , then in the above process: , the pressure value detected by the rear air cavity 1102 becomes smaller, and , the pressure value in the front air cavity 1101 increases;

[0066] Method 2: Combined with method 1, when the push rod structure provides a pulling force when it moves to the right, if the pulling force provided is less than the load of the object, the movable rod 6 at the left position remains stationary, but the movable rod 6 at the right side will move to the right, which directly causes the piston block 10 at the left position to move to the left to the maximum distance, thereby calculating ,and ;

[0067] S4: According to the two methods in S3, they are used to mark the abnormal state of the object being driven to move. For this formula, we need to add , but it should be noted that: , among which is the pressure difference, in the initial state, =1, but according to method 1 and method 2, , because of which is a relative constant, so according to the moving direction of the push rod structure in mode 1 or mode 2, the obtained are all fixed values, As a numerical value in the front difference or the back difference;

[0068] S5: In combination with S3 and S4, the output power of the drive motor 1 needs to be increased , in order to increase , but in this process, the movement distances of the two piston blocks 10 are different, thus regenerating , and pre-set The range is: 0.45< <0.54, its purpose is to increase the output power of the drive motor 1 Under this premise, the reaction force on the movable rod 6 is required according to the load of the object, and the output power of the driving motor 1 does not need to be controlled by the load value. , but through and Reverse control in a coordinated manner , while ensuring the normal operation of the entire equipment, reduce the impact of the reaction force exerted by the object on the movable rod 6.

[0069] In summary: the push rod structure composed of a transfer sleeve and two movable rods, when the push rod structure moves to the left or right direction, the transfer sleeve serves as a structural component for buffering "energy storage" or buffering "energy release" during the movement process, and its purpose is to reduce the stress damage to the movable rod caused by the reaction force generated during the load process. On the above basis, a corresponding control system is provided, which is specifically manifested as follows: the pressure value changes in the front air cavity and the rear air cavity are used to feed back the pressure difference between the two, which is then converted into a load value, and the front position difference, rear position difference and equal position value are further calculated according to the pressure difference. The above three values ​​are used to reversely control the output power in the overall structure, and its purpose is to avoid greater stress damage to the acquisition rod due to excessive difference under the premise of ensuring the normal operation of the overall structure.

[0070] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0072] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An intelligent electric cylinder with load peak control, comprising a drive motor (1), an external sleeve (2), a screw (8), a movable sleeve (7) and a movable rod (6), characterized in that: The external sleeve (2) is mounted on the drive motor (1), the screw rod (8) is mounted at the output end of the drive motor (1), and the screw rod (8) is located inside the external sleeve (2), the movable sleeve (7) and the screw rod (8) are threadedly connected, and the movable sleeve (7) is slidably connected inside the external sleeve (2), and the number of movable rods (6) is two, one of which is fixedly connected to the movable sleeve (7); A transfer sleeve (5) is arranged between the two movable rods (6); an external controller assembly (3) is mounted on the external sleeve (2); the external controller assembly (3) comprises a detection component, an analysis component and a motion control component; the detection component comprises two gas pressure sensors, and the detection component is used to collect detection data; the analysis component performs an analysis action based on the detection data to obtain analysis parameters; and the motion control component controls the motion state of the drive motor (1) based on the analysis parameters in the analysis component; Two piston blocks (10) are slidably mounted inside the transfer sleeve (5), and a front air chamber (1101) and a rear air chamber (1102) are respectively arranged inside the transfer sleeve (5) through the two piston blocks (10); a front air port (401) and a rear air port (402) are respectively mounted on the upper side of the circumferential outer wall of the transfer sleeve (5); the front air port (401) and the front air chamber (1101) are communicated with each other, and the rear air port (402) and the rear air chamber (1102) are communicated with each other, and air pipes (4) are respectively mounted on the front air port (401) and the rear air port (402); The detection data includes pressure values ​​on two gas pressure sensors, output power of the drive motor (1) and directional motion parameters. The pressure values ​​on the two gas pressure sensors are set as primary pressure values ​​and secondary pressure values ​​according to the distribution positions of the front air cavity (1101) and the rear air cavity (1102). A pressure difference-load conversion formula is established in the analysis action. The output power is used as a dynamic variable, and the primary pressure value and the secondary pressure value are used as conversion variables in the pressure difference-load conversion formula to calculate the analysis parameters. The analysis parameters are composed of a front position difference value, a rear position difference value and an equal position value. The front position difference value is used to mark an abnormal state of the movable rod (6) in the forward movement action, the rear position difference value acts on an abnormal state of the movable rod (6) in the backward movement action, and the equal position value is used to mark a stable state of the movable rod (6) in the forward movement action or the backward movement action; The movable rod (6) is provided with the following movement modes according to the arrangement positions of the two piston blocks (10): Movement mode 1: The driving motor (1) drives the movable rod (6) to move to the left through the screw rod (8) and the movable sleeve (7), and the piston block (10) located at the left position slides to the right side due to the reaction force of the movable rod (6) located at the left position. After the piston block (10) at the left position slides to the right side to reach the distance peak, the volume change of the front air chamber (1101) drives the piston block (10) at the right position to continue to move to the right side, wherein the front air chamber (1101) and the rear air chamber (1102) include the following states: A: When the piston block (10) at the left position has not reached the distance peak, the volume of the front air chamber (1101) decreases, the volume of the rear air chamber (1102) remains unchanged, the primary pressure value increases, and the secondary pressure value remains unchanged; B: When the piston block (10) at the left position reaches the distance peak, the volumes of the front air chamber (1101) and the rear air chamber (1102) decrease, and the primary pressure value and the secondary pressure value increase; C: After the piston block (10) at the right position is moved to the right by the front air chamber (1101) to a peak value, the volume changes of the front air chamber (1101) and the rear air chamber (1102) reach an upper limit value, and the primary pressure value and the secondary pressure value continue to increase until they tend to a stable value; Movement mode 2: the driving motor (1) drives the movable rod (6) to move to the right through the screw rod (8) and the movable sleeve (7), the piston block (10) located at the right position moves to the right, the volume of the rear air chamber (1102) decreases, the piston block (10) located at the left position moves to the left, the volume of the front air chamber (1101) increases, wherein the front air chamber (1101) and the rear air chamber (1102) include the following states: D: The volume of the rear air cavity (1102) decreases, and the secondary pressure value increases until it reaches a stable value; E: The volume of the front air cavity (1101) increases, and the primary pressure value decreases until it reaches the regional stable value; Movement mode three: The primary pressure value and the secondary pressure value in movement mode one and movement mode two are sent to the pressure difference-load conversion formula respectively, and the output power of the drive motor (1) is reversely controlled according to the equal position value, the front position difference value and the rear position difference value.

2. The intelligent electric cylinder with load peak control according to claim 1, characterized in that: The movable rod (6) is located on the left and right sides of the transfer sleeve (5), and the movable rod (6) and the transfer sleeve (5) are slidably connected, and the movable rod (6) located on the right side is fixedly connected to the movable sleeve (7).

3. The intelligent electric cylinder with load peak control according to claim 1, characterized in that: A sealing ring (9) is mounted on the piston block (10), and a support rod is mounted on the piston block (10). The support rod passes through the transfer sleeve (5) and is slidably connected to the transfer sleeve (5), and the support rod is fixedly connected to the movable rod (6).

4. The intelligent electric cylinder with load peak control according to claim 1, characterized in that: The front air cavity (1101) and the rear air cavity (1102) are arranged along the length direction of the transfer sleeve (5) from left to right, and the volumes of the front air cavity (1101) and the rear air cavity (1102) are equal. The two air pipes (4) are respectively connected to the conduction ends of the gas pressure sensor.

5. The intelligent electric cylinder with load peak control according to claim 1, characterized in that: The directional motion parameters include the cross-sectional areas of the front air cavity (1101) and the rear air cavity (1102), and the peak distance of the piston block (10) during the sliding process inside the transfer sleeve (5). The sliding direction of the front air cavity (1101) inside the transfer sleeve (5) and the sliding direction of the rear air cavity (1102) inside the transfer sleeve (5) is rightward or leftward.

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