An online rapid stroke adjustment method for an electric push rod and an electric push rod

Abstract

The present invention provides a method for online rapid adjustment of the stroke of an electric push rod, comprising the following steps: rapid adjustment of the minimum installation distance of a telescopic tube: opening the cover of an adjustment window, toggling an upper adjustment disk, and changing the distance between a first sensing block on the upper adjustment disk and a limit switch; rapid adjustment of the stroke of the telescopic tube: opening the cover of the adjustment window, rotating the lower adjustment disk, keeping the upper adjustment disk stationary, and changing the relative position of a second sensing block on the lower adjustment disk and the limit switch; the distance between the adjusting disk and the limit switch is changed by rotating the adjusting disk, thereby achieving efficient and stepless full-stroke adjustment. At the same time, by utilizing the openable adjustment window, sealing and waterproofing are performed after the adjustment is completed, thereby achieving a higher waterproof grade, thereby solving the technical problems in the prior art of being unable to achieve stepless adjustment of the full stroke and having a poor waterproof grade.

Description

Technical Field

[0001] The present invention relates to the technical field of electric push rods, and particularly to a method for online rapid adjustment of the stroke of an electric push rod and an electric push rod. Background Art

[0002] The stroke adjustment of an electric push rod is a crucial operation process, which determines the movement range and position accuracy of the electric push rod. The stroke of the electric push rod is generally controlled by limit switches. By adjusting the position of the limit switches or setting the parameters of the encoder, precise adjustment of the stroke of the electric push rod can be achieved.

[0003] Chinese Patent CN210404974U discloses an electric push rod with adjustable stroke, including a motor, a cylinder block, a front cover, a rear cover, and a push rod. The front cover and the rear cover are respectively covered at both ends of the cylinder block. The push rod is movably arranged inside the cylinder block. The outer end of the push rod axially extends outside the cylinder block and is slidably matched with the front cover. A lead screw nut and a lead screw are provided inside the push rod. A worm and a worm gear are meshed inside the rear cover. A travel switch is provided between the push rod and the cylinder block. Buttons are provided on the travel switch. A trigger body for triggering the button is provided on the lead screw nut. A slide rail is provided on the cylinder block, and a plurality of opening grooves are provided on the slide rail. A sliding seat slidably matched with the slide rail is provided on the travel switch. The sliding seat passes through the slide rail and extends outside the cylinder block. A locking block hinged with the sliding seat is provided outside the cylinder block. The end of the locking block is locked and matched with the opening groove. A return spring is abutted between the locking block and the travel switch. The present utility model has the advantages of simple and compact structure and convenient stroke adjustment.

[0004] However, this technical solution uses the method of a slide rail cooperating with an opening groove to achieve online adjustment. However, it is a segmented adjustment and cannot achieve full-stroke adjustment. At the same time, the chute structure cannot achieve a high waterproof level and is not suitable for working conditions with a high waterproof level. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for online rapid adjustment of the stroke of an electric push rod in view of the deficiencies of the prior art. By rotating the adjustment disk to change the distance between the adjustment disk and the limit switch, efficient and stepless full-stroke adjustment is achieved. At the same time, by using an adjustable adjustment window, after the adjustment is completed, sealing and waterproofing are achieved, suitable for a higher waterproof level, and the technical problems in the prior art of being unable to achieve stepless full-stroke adjustment and having a poor waterproof level are solved.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for online rapid adjustment of the stroke of an electric push rod

[0008] A method for online rapid adjustment of the stroke of an electric push rod, characterized by comprising the following steps:

[0009] Quick adjustment of the minimum installation distance of the telescopic tube: Open the cover plate of the adjustment window, turn the upper adjustment disc, change the distance between the first induction block on the upper adjustment disc and the limit switch, and the telescopic tube of the motor runs to the minimum extension position. Detect the minimum installation distance of the telescopic tube. After the minimum installation distance meets the requirements, complete the adjustment of the minimum installation distance of the telescopic tube;

[0010] Quick adjustment of the telescopic tube stroke: Open the cover plate of the adjustment window, rotate the lower adjustment disc, keep the upper adjustment disc stationary, change the relative position between the second induction block on the lower adjustment disc and the limit switch, and the telescopic tube of the motor runs to the maximum extension position. Detect the maximum stroke distance of the telescopic tube. After the maximum stroke meets the set value, complete the quick adjustment of the telescopic tube stroke.

[0011] As an improvement, it also includes fine adjustment of the minimum installation distance. Turn the second adjustment knob to drive the second adjustment rod to move to the right, so that the second adjustment gear and the first external teeth mesh and drive. Turn the second adjustment knob to change the position of the upper adjustment disc relative to the limit switch, and complete the fine adjustment of the telescopic tube stroke.

[0012] As an improvement, it also includes fine adjustment of the telescopic tube stroke: Turn the first adjustment knob to drive the first adjustment rod to move to the right, so that the first adjustment gear meshes with the second internal teeth, rotate the first adjustment knob, drive the lower adjustment disc to rotate, change the position of the lower adjustment disc relative to the limit switch, and complete the fine adjustment of the minimum installation distance.

[0013] As an improvement, in the step of fine adjustment of the telescopic tube stroke, the friction coefficient of the second friction plate is less than that of the first friction plate. When turning the lower adjustment disc, the upper adjustment disc remains stationary.

[0014] As an improvement, in the step of fine adjustment of the minimum installation distance, the friction coefficient of the second friction plate is less than that of the first friction plate. During the rotation of the upper adjustment disc, the lower adjustment disc rotates synchronously with the upper adjustment disc.

[0015] As an improvement, in the step of quick adjustment of the minimum installation distance of the telescopic tube, when turning the upper adjustment disc, press the lower adjustment disc to ensure that the lower adjustment disc remains stationary.

[0016] As an improvement, scale lines for visual inspection of the adjustment distance are provided on the outer sides of the upper adjustment disc and the lower adjustment disc.

[0017] Another object of the present invention is to provide an electric push rod in view of the deficiencies of the prior art, adopting the above adjustment method to achieve quick adjustment of the stroke of the electric push rod.

[0018] To achieve the above object, the present invention provides the following technical solutions:

[0019] An electric push rod, characterized in that the stroke of the electric push rod is adjusted by using the above-mentioned online rapid adjustment method for the stroke of the electric push rod. The electric push rod includes a housing, a sleeve, a transmission component, a telescopic tube component, a switch component, a detection component and a fine adjustment component;

[0020] The transmission component includes a screw rod;

[0021] The telescopic tube component includes a telescopic tube;

[0022] The detection component includes: an internal gear ring, a multi-stage reduction gear, an upper adjustment disk and a lower adjustment disk; the input end of the multi-stage reduction gear is meshed and driven with the screw rod, and its output end is meshed and driven with the first internal teeth of the internal gear ring, and the internal gear ring drives the upper adjustment disk and the lower adjustment disk to rotate synchronously in sequence;

[0023] The upper adjustment disk is provided with first external teeth, and one side of the upper adjustment disk protrudes with a first induction block for induction with the limit switch,

[0024] The inner diameter surface of the lower adjustment disk is provided with second internal teeth, and the inner diameter of one end thereof is provided with a second induction block for induction with the limit switch;

[0025] A first friction plate is provided between the internal gear ring and the upper adjustment disk;

[0026] A second friction plate is provided between the upper adjustment disk and the lower adjustment disk;

[0027] The friction coefficient of the second friction plate is smaller than that of the first friction plate.

[0028] As an improvement, the fine adjustment component includes a first adjustment rod for adjusting the stroke of the telescopic tube and a second adjustment rod for adjusting the minimum installation distance of the telescopic tube.

[0029] As an improvement, the end of the first adjustment rod is provided with a first adjustment gear; the first adjustment gear is meshed and driven with the second internal teeth; a first adjustment knob is further provided on the first adjustment rod;

[0030] The end of the second adjustment rod is provided with a second adjustment gear; the second adjustment gear is meshed and driven with the first external teeth; a second adjustment knob is further provided on the second adjustment rod.

[0031] The beneficial effects of the present invention are as follows:

[0032] (1) The present invention changes the distance relative to the limit switch by rotating the upper and lower adjusting disks, thereby achieving stepless adjustment of the entire stroke of the electric push rod. At the same time, the stroke of the electric push rod can be quickly adjusted by toggling the upper and lower adjusting disks. After the adjustment is completed, the closing and sealing of the adjustment window can be used to make the waterproof grade of the electric push rod reach IP68 or higher, thereby solving the technical problems of slow stroke adjustment, inability to achieve full stroke adjustment, and poor waterproof grade in the prior art.

[0033] (2) The present invention realizes the control of the travel and minimum installation distance of the telescopic tube by setting up the detection component. At the same time, the detection component can be used to quickly adjust the travel and minimum installation distance of the telescopic tube to solve the technical problems in the prior art that the travel and minimum installation distance of the electric push rod are slow to adjust and inconvenient to adjust online. At the same time, the fine adjustment component is used to accurately adjust the travel and minimum installation distance of the telescopic tube by using the small gear to drive the large gear to rotate and in conjunction with the scale line on the adjustment disk, thereby solving the problem of inaccurate manual coarse adjustment position.

[0034] (3) The present invention converts the rotation distance of the screw into the rotation distance of the upper adjustment disk and the lower adjustment disk through a multi-stage reduction gear, thereby realizing the minimum installation distance and stroke position detection. The detection mechanism is built into the electric push rod, which improves the application range of the electric push rod, especially for occasions with high requirements for waterproofing.

[0035] (4) The present invention realizes that the adjacent inner gear ring and the upper adjustment plate are connected into an integral structure by setting the first elastic limit member and the first positioning groove, thereby realizing synchronous rotation. The setting of the first friction plate between the two further ensures that the two can rotate synchronously.

[0036] (5) The present invention tightly compresses the inner gear ring, the upper adjustment plate and the lower adjustment plate through the compression assembly, ensuring that the three rotate synchronously during the normal operation of the electric push rod, thereby realizing the stroke detection of the electric push rod.

[0037] (6) The present invention reduces the friction between the lower adjustment disk and the upper switch seat and between the elastic pressing member and the inner gear ring by providing a connecting piece, thereby ensuring that the upper adjustment disk, the lower adjustment disk and the inner gear ring rotate stably and synchronously, thereby improving the stroke detection accuracy.

[0038] (7) The present invention provides an openable adjustment window on the electric push rod, thereby facilitating quick online adjustment of the stroke of the electric push rod and improving the applicability of the electric push rod, especially for working conditions that require frequent stroke adjustment.

[0039] In summary, the present invention has the advantages of being able to adjust the stroke of the push rod and the minimum installation distance online, having a fast adjustment speed and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Flow chart of Embodiment 1 of the present invention

[0041] Figure 2 Schematic diagram of the overall structure of the present invention

[0042] Figure 3 Schematic diagram of the overall cross-section of the present invention

[0043] Figure 4 Schematic diagram of the installation of the switch component and the detection component of the present invention

[0044] Figure 5 Schematic diagram of the structure of the internal gear ring of the present invention

[0045] Figure 6 Schematic diagram of the upper adjustment disc of the present invention

[0046] Figure 7 Schematic diagram of the cross-section of the lower adjustment disc of the present invention

[0047] Figure 8 Schematic diagram of the installation of the fine adjustment component of the present invention

[0048] Figure 9 Schematic diagram of the cross-section of the detection component of the present invention

[0049] Figure 10 Schematic diagram of the installation of the first elastic limiting member on the internal gear ring of the present invention

[0050] Figure 11 Schematic diagram of the partial enlargement of the fine adjustment component of the present invention

[0051] Figure 12 For Figure 3 Partial enlargement schematic diagram at position A in

[0052] Figure 13 For Figure 9 Partial enlargement schematic diagram at position B in

[0053] Figure 14 For Figure 9 Partial enlargement schematic diagram at position C in

[0054] Figure 15 For Figure 9 Partial enlargement schematic diagram at position D in

[0055] Figure 16 For Figure 9 Partial enlargement schematic diagram at position E in Detailed implementation manners

[0056] 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.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying 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 one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0058] Example 1

[0059] like Figure 1 As shown, this embodiment provides a method for online rapid adjustment of the stroke of an electric push rod, comprising the following steps:

[0060] Quick adjustment of the minimum installation distance of the telescopic tube: Open the cover of the adjustment window 31, turn the upper adjustment disk 73, change the distance between the first sensor block 738 on the upper adjustment disk 73 and the limit switch 64, and the telescopic tube 52 of the motor runs to the minimum extension position to detect the minimum installation distance of the telescopic tube. When the minimum installation distance meets the requirement, the minimum installation distance of the telescopic tube 52 is adjusted;

[0061] Quick adjustment of the telescopic tube stroke: Open the cover of the adjustment window 31, rotate the lower adjustment disk 74, keep the upper adjustment disk 73 stationary, change the relative position of the second sensing block 747 on the lower adjustment disk 74 and the limit switch 64, and the telescopic tube 52 of the motor runs to the maximum extension position. The maximum travel distance of the telescopic tube is detected. When the maximum travel meets the set value, the quick adjustment of the telescopic tube stroke is completed;

[0062] As an improvement, it further includes fine adjustment of the minimum installation distance. Turn the second adjustment knob 822 to drive the second adjustment rod 82 to move rightward, so that the second adjustment gear 821 meshes with and drives the first external teeth 736. Turn the second adjustment knob 822 to change the position of the upper adjustment disk 73 relative to the limit switch 64, and complete the fine adjustment of the stroke of the telescopic tube 52.

[0063] As an improvement, it further includes fine adjustment of the telescopic tube stroke: Turn the first adjustment knob 812 to drive the first adjustment rod 81 to move rightward, so that the first adjustment gear 811 meshes with the second internal teeth 745. Rotate the first adjustment knob 812 to drive the lower adjustment disk 74 to rotate, change the position of the lower adjustment disk 74 relative to the limit switch 64, and complete the fine adjustment of the minimum installation distance.

[0064] Preferably, in the step of fine adjustment of the telescopic tube stroke, the friction coefficient of the second friction plate 78 is less than that of the first friction plate 77. When turning the lower adjustment disk 74, the upper adjustment disk 73 remains stationary.

[0065] Preferably, in the step of fine adjustment of the minimum installation distance, the friction coefficient of the second friction plate 78 is less than that of the first friction plate 77. During the rotation of the upper adjustment disk 73, the lower adjustment disk 74 rotates synchronously with the upper adjustment disk 73.

[0066] Preferably, in the step of quickly adjusting the minimum installation distance of the telescopic tube, when turning the upper adjustment disk 73, press the lower adjustment disk 74 to ensure that the lower adjustment disk 74 remains stationary.

[0067] Preferably, scale lines for visually observing the adjustment distance are provided on the outer sides of the upper adjustment disk 73 and the lower adjustment disk 74.

[0068] Embodiment 2

[0069] As Figures 2 - 16 shown, this embodiment provides an electric push rod, and the stroke of the electric push rod is adjusted by using the method for online quick adjustment of the stroke of an electric push rod described in Embodiment 1 above. This electric push rod includes a housing 1, a sleeve 3, a transmission component 4, a telescopic tube component 5, a switch component 6, a detection component 7, and a fine adjustment component 8;

[0070] The transmission component 4 includes a lead screw 42;

[0071] The telescopic tube component 5 includes a telescopic tube 52;

[0072] The detection component 7 includes: an internal gear ring 71, a multi-stage reduction gear 72, an upper adjustment disk 73, and a lower adjustment disk 74; The input end of the multi-stage reduction gear 72 meshes with and drives the lead screw 42, and its output end meshes with and drives the first internal teeth 712 of the internal gear ring 71. The internal gear ring 71 drives the upper adjustment disk 73 and the lower adjustment disk 74 to rotate synchronously in sequence;

[0073] The upper adjusting disc 73 is provided with a first external tooth 736, and a first induction block 738 for induction with the limit switch 64 is convexly provided on one side of the upper adjusting disc 73.

[0074] The inner diameter surface of the lower adjusting disc 74 is provided with a second internal tooth 745, and a second induction block 747 for induction with the limit switch 64 is provided at the inner diameter of one end thereof.

[0075] A first friction plate 77 is provided between the internal tooth ring 71 and the upper adjusting disc 73.

[0076] A second friction plate 78 is provided between the upper adjusting disc 73 and the lower adjusting disc 74.

[0077] The friction coefficient of the second friction plate 78 is smaller than that of the first friction plate 77.

[0078] As an improvement, the fine adjustment component 8 includes a first adjusting rod 81 for adjusting the stroke of the telescopic tube 52 and a second adjusting rod 82 for adjusting the minimum installation distance of the telescopic tube 52.

[0079] As an improvement, a first adjusting gear 811 is provided at the end of the first adjusting rod 81; the first adjusting gear 811 is in meshing transmission with the second internal tooth 745; a first adjusting knob 812 is further provided on the first adjusting rod 81.

[0080] A second adjusting gear 821 is provided at the end of the second adjusting rod 82; the second adjusting gear 821 is in meshing transmission with the first external tooth 736; a second adjusting knob 822 is further provided on the second adjusting rod 82.

[0081] Embodiment Three

[0082] As Figures 2 - 16 shown, the same or corresponding components as those in Embodiment Two adopt the corresponding reference numerals in Embodiment Two. For the sake of simplicity, only the differences from Embodiment Two will be described below. The difference between this Embodiment Three and Embodiment Two is that:

[0083] An electric push rod includes:

[0084] A housing 1, a motor assembly 2 is provided inside the housing 1, and the motor assembly 2 includes a reduction motor 21 and a mounting bracket 22 connected to the reduction motor 21.

[0085] A sleeve 3, the sleeve 3 is threadedly connected to one end of the housing 1.

[0086] A transmission assembly 4, the transmission assembly 4 is in transmission connection with the motor assembly 2.

[0087] A telescopic tube assembly 5, the telescopic tube assembly 5 is in transmission connection with the output end of the transmission assembly 4.

[0088] The transmission component 4 includes:

[0089] A bearing seat 41, which is connected to the motor component 2; specifically, the bearing seat 41 is connected to the mounting bracket 22;

[0090] A lead screw 42, one end of which is in transmission connection with the reduction motor 21; the lead screw 42 is rotatably arranged in the bearing seat 41; specifically, a threaded shaft sleeve is threadedly connected to the lead screw 42, and a bearing is provided between the outer diameter surface of the threaded shaft sleeve and the inner wall of the bearing seat 41 to support the stable rotation of the lead screw 42. At the same time, the threaded shaft sleeve can prevent the lead screw 42 from being worn and improve the service life of the lead screw 42;

[0091] And an anti - detachment component 43, which is arranged at the other end of the lead screw 42 to prevent the transmission nut 51 from falling off; the anti - detachment component 43 includes an anti - detachment gasket 431 and an anti - detachment nut 432. The anti - detachment nut 432 is threadedly connected to the end of the lead screw 42 to fix the anti - detachment gasket 431 to the end of the lead screw 42;

[0092] The telescopic tube component 5 includes:

[0093] A transmission nut 51, which is in transmission connection with the transmission component 4; specifically, the transmission nut 51 is in threaded transmission connection with the lead screw 42;

[0094] A telescopic tube 52, one end of which is threadedly connected to one end of the transmission nut 51, and the other end extends out of one end of the sleeve 3;

[0095] A transmission guide sleeve 53, which is fixedly connected to the transmission nut 51; the outer diameter surface of the transmission guide sleeve 53 is in sliding and guiding connection with the inner wall of the telescopic tube 52; specifically, a number of guiding protrusions are provided on the outer diameter surface of the transmission guide sleeve 53, and guiding grooves are provided on the inner wall of the sleeve 3, and the transmission guide sleeve 53 reciprocates along the guiding grooves;

[0096] And a guiding component 54, which is arranged at one end of the telescopic tube component 5 to guide the telescopic tube component 5 to reciprocate;

[0097] The guiding component 54 includes a positioning member 541, a guiding member 542 provided on the inner wall of the positioning member 541 for guiding contact with the telescopic tube assembly 5, and a sealing component for sealing the telescopic tube assembly 5; the outer diameter surface of the positioning member 541 is threadedly connected to the end of the sleeve 3, and at the connection, a waterproof sealant is used for bonding. A sealing ring is also provided between the positioning member 541 and the sleeve 3; the sealing component includes multiple groups of sealing rings. The multiple groups of sealing rings can be sequentially arranged from the inside out as an O-ring, a Struthers seal, a dust-proof ring, etc. Of course, it is not limited to the above sequence combination, and the corresponding sealing ring combination is selected according to different waterproof and dust-proof grades;

[0098] It further includes: a switch component 6, which is provided on one side of the transmission component 4 and is used to quickly adjust and limit the stroke of the telescopic tube assembly 5;

[0099] A detection component 7, which transmits the rotation stroke of the lead screw 42 to the limit switch 64;

[0100] And a fine adjustment component 8, which is used to quickly adjust the position of the detection component 7 relative to the limit switch 64;

[0101] The switch component 6 includes: a lower switch base 61, an upper switch base 62, and a switch mounting plate 63 provided between the lower switch base 61 and the upper switch base 62;

[0102] The lower switch base 61, the switch mounting plate 63, and the upper switch base 62 are sequentially connected to the bearing seat 41 through fasteners;

[0103] A limit switch 64 for restricting the stroke of the telescopic tube 52 is installed on the switch mounting plate 63, and the control board of the limit switch 64 protrudes from the upper switch base; it should be noted that two limit switches 64 are provided, one for restricting the shortest stroke of the telescopic tube 52, that is, the minimum installation distance, and the other for restricting the maximum stroke of the telescopic tube 52;

[0104] The lower switch base 61 is firmly connected to the bearing seat 41;

[0105] As an improvement, the detection component 7 includes: an internal gear ring 71, a multi-stage reduction gear 72, an upper adjustment disk 73, and a lower adjustment disk 74; the input end of the multi-stage reduction gear 72 is meshed and driven with the lead screw 42, and its output end is meshed and driven with the first internal teeth 712 of the internal gear ring 71. The internal gear ring 71 sequentially drives the upper adjustment disk 73 and the lower adjustment disk 74 to rotate synchronously. The upper adjustment disk 73 and the lower adjustment disk 74 are used to control the on and off of the limit switch 64.

[0106] Preferably, one end of the inner diameter surface of the internal gear ring 71 is provided with a first inner diameter surface 711, and the first inner teeth 712 are provided on the first inner diameter surface 711; the outer diameter surface of the internal gear ring 71 is provided with a first outer diameter surface 713;

[0107] The multi-stage reduction gear 72 is provided on the upper switch base 62 for achieving multi-stage intermeshing gear rotation for reducing speed. Specifically, a large gear on the outermost side of the multi-stage reduction gear 72 meshes with the external teeth provided on the screw rod 42 for transmission, and the large gear on the other side meshes with the first internal teeth 712. The multi-stage reduction gear 72 transmits the rotation distance of the screw rod 42 to the inner gear ring 71. It should be noted that two support shafts 621 are provided on the upper switch base 62, and a plurality of large gears and small gears are alternately provided on the same support shaft 621. A set of large gears and small gears opposite to the two support shafts 621 mesh with each other to achieve reduction in speed.

[0108] As an improvement, the inner diameter surface of the upper adjusting disk 73 is provided with a second inner diameter surface 731 , and the second inner diameter surface 731 is sleeved with the first outer diameter surface 713 ;

[0109] The second inner diameter surface 731 is provided with a first positioning groove 732 , and the first outer diameter surface 713 is provided with a plurality of first elastic limiting members 733 that cooperate with the first positioning groove 732 ;

[0110] The outer diameter surface of the upper adjustment plate 73 is provided with a second outer diameter surface 734 and a third outer diameter surface 735 . The third outer diameter surface 735 is provided with first outer teeth 736 . The second outer diameter surface 734 is provided with a plurality of second elastic limiting members 737 .

[0111] A first sensing block 738 for sensing the limit switch 64 is provided on one side of the upper adjustment disk 73; specifically, the first sensing block 738 is preferably provided at the inner diameter of the upper adjustment disk 73;

[0112] The outer diameter surface of the upper adjustment disk 73 is also provided with scale lines for rapid size adjustment, so that the operator can quickly adjust the stroke of the electric push rod.

[0113] Preferably, the lower adjustment disk 74 is provided between the upper adjustment disk 73 and the upper switch seat 62; the inner diameter surface of the lower adjustment disk 74 is provided with a third inner diameter surface 741 and a fourth inner diameter surface 742; the third inner diameter surface 741 is fitted with the second outer diameter surface 734;

[0114] The third inner diameter surface 741 is provided with a second positioning groove 744 , and the second elastic limiting member 737 is adapted to the second positioning groove 744 ;

[0115] The fourth inner diameter surface 742 is provided with second inner teeth 745;

[0116] The lower adjustment disk 74 is provided with a second sensing block 747 for sensing with the limit switch 64 ; specifically, the second sensing block 747 is provided at the inner diameter surface of the lower adjustment disk 74 .

[0117] As an improvement, the detection component 7 further includes a pressing component 75, and the pressing component 75 tightly presses the internal gear ring 71, the upper adjusting disc 73, and the lower adjusting disc 74 against one end of the upper switch base 62;

[0118] The pressing component 75 includes:

[0119] A pressing sleeve 751, which is threadedly connected to the inner wall of the sleeve 3; the outer diameter surface of the pressing sleeve 751 is provided with patterns for facilitating the screwing of the pressing sleeve 751;

[0120] And an elastic pressing member 752, one end of the elastic pressing member 752 abuts against the pressing sleeve 751, and the other end abuts against the internal gear ring 71. Specifically, the elastic pressing member 752 is preferably a compression spring. One end of the compression spring abuts against the step on the inner diameter surface of the pressing sleeve 751, and the other end abuts against the internal gear ring 71. By changing the distance between the pressing sleeve 751 and the internal gear ring, the adjustment of the pressing force is achieved.

[0121] Low-friction connecting members 76 are provided between the lower adjusting disc 74 and the upper switch base 62 and between the elastic pressing member 752 and the internal gear ring 71; specifically, the connecting members 76 can be selected from oil-impregnated bearings, rolling bearings, ultra-thin gaskets, etc. to reduce the frictional resistance between the lower adjusting disc 74 and the switch base.

[0122] Embodiment 4

[0123] As Figure 9 、 Figures 13 - 16 shown, where the same or corresponding components as in Embodiment 3 are labeled with the corresponding reference numerals of Embodiment 3. For the sake of simplicity, only the differences from Embodiment 3 will be described below. The difference between this Embodiment 4 and Embodiment 3 is that:

[0124] In this embodiment, a first friction plate 77 is provided between one end face of the internal gear ring 71 and the bottom end face of the second inner diameter surface 731; there are two first friction plates 77, which are respectively connected to the internal gear ring 71 and the upper adjusting disc 73 by a number of circumferentially evenly distributed cylindrical pins 771; a number of elastic members 772 for abutting against the first friction plate 77 are provided on one end face of the internal gear ring 71 to make the two first friction plates 77 closely fit together to achieve frictional transmission; preferably, the elastic member 772 is a spring;

[0125] A second friction plate 78 is provided between the bottom end of the third inner diameter surface 741 and the top end of the second outer diameter surface 734; there are two second friction plates 78, which are respectively connected to the lower adjusting disc 74 and the upper adjusting disc 73 by a number of circumferentially evenly distributed cylindrical pins 771; a number of elastic members 772 are evenly distributed in the circumferential direction at the top end of the second outer diameter surface 734, which are used to closely fit the two second friction plates 78 to achieve friction transmission;

[0126] As an improvement, the friction coefficient of the second friction plate 78 is smaller than that of the first friction plate 77.

[0127] It should be noted that during the process of realizing stroke adjustment, when the upper adjusting disc 73 is toggled alone, the lower adjusting disc 74 rotates synchronously with the upper adjusting disc, and the internal gear ring remains stationary, realizing the adjustment of the distance between the upper adjusting disc 73 and the limit switch, so as to realize the rapid adjustment of the minimum installation distance;

[0128] After adjusting the minimum installation distance, when the lower adjusting disc is toggled alone, the upper adjusting disc 73 remains stationary, and the internal gear ring remains stationary, realizing the position adjustment of the lower adjusting disc relative to the upper adjusting disc 73 and the limit switch, so as to realize the rapid adjustment of the stroke of the telescopic tube 52.

[0129] As an improvement, the diameter of the second friction plate 78 is smaller than that of the first friction plate 77.

[0130] Specifically, in the case of the same normal pressure, a larger friction plate diameter will increase its torque upper limit. When inputting torque, the internal gear ring, the upper adjusting disc, and the lower adjusting disc are regarded as a whole, and the torque they receive is the same. Therefore, the friction plate with a smaller diameter will reach the friction force upper limit first and then be rotated.

[0131] Embodiment Five

[0132] As shown in Figure 8 、 Figure 11 , among which the same or corresponding components as those in Embodiment Three adopt the corresponding reference numerals in Embodiment Three. For the sake of simplicity, only the differences from Embodiment Three will be described below. The difference between this Embodiment Five and Embodiment Three is that:

[0133] In this embodiment, the fine adjustment component 8 includes a first adjusting rod 81 for adjusting the stroke of the telescopic tube 52 and a second adjusting rod 82 for adjusting the minimum installation distance of the telescopic tube 52.

[0134] Further, one end of the second adjusting rod 82 is rotatably and axially slidably disposed on the lower switch base 61 along the axial direction of the lower switch base 61, and the other end passes through the upper switch base 62 and extends into the inner part of the lower adjusting disc 74; a second adjusting gear 821 is provided at the end of the second adjusting rod 82; the second adjusting gear 821 is in meshing transmission with the first external tooth 736; a second adjusting knob 822 is further provided on the second adjusting rod 82; magnetic rings 813 are provided at both ends of the second adjusting knob 822, and magnetic rings 813 are also provided at the positions where the second adjusting rod 82 passes through the lower switch base 61 and the upper switch base 62;

[0135] When it is necessary to precisely adjust the minimum installation distance of the telescopic tube 52, turn the second adjusting knob 822 to move the second adjusting rod 82 to the right, driving the second adjusting gear 821 and the first external tooth 736 to be in meshing transmission. Rotate the second adjusting knob 822 to synchronously rotate the upper adjusting disc 73 and the lower adjusting disc 74, realizing the distance adjustment of the upper adjusting disc 73 relative to the limit switch, so as to achieve the precise adjustment of the minimum installation distance; when adjustment is not required, the second adjusting knob 822 moves to the left and is adsorbed on the lower switch base 61 by the magnetic ring 813. At the same time, the second adjusting gear 821 disengages from the meshing.

[0136] As an improvement, one end of the first adjusting rod 81 is rotatably and axially slidably disposed on the lower switch base 61 along the axial direction of the lower switch base 61, and the other end passes through the upper switch base 62 and extends into the inner part of the lower adjusting disc 74; a first adjusting gear 811 is provided at the end of the first adjusting rod 81; the first adjusting gear 811 is in meshing transmission with the second internal tooth 745; a first adjusting knob 812 is further provided on the first adjusting rod 81; magnetic rings 813 are provided at both ends of the first adjusting knob 812, and magnetic rings 813 are also provided at the positions where the first adjusting rod 81 passes through the lower switch base 61 and the upper switch base 62;

[0137] It should be noted that the upper switch base 62 is further provided with a receiving cavity for receiving the first adjusting gear 811. When adjustment is not required, the first adjusting knob 812 is close to the lower switch base 61, so that the magnetic ring 813 on the lower switch base 61 attracts the magnetic ring 813 of the first adjusting knob 812, fixing the first adjusting knob 812 on the lower switch base 61. At the same time, the first adjusting gear 811 enters the receiving cavity and disengages from the second internal teeth 745. When precise adjustment of the position of the lower adjusting disc 74 is required, the first adjusting knob 812 is toggled to make the first adjusting knob 812 close to the upper switch base 62 and adsorbed by the magnetic ring 813. At this time, the first adjusting gear 811 meshes with the second internal teeth 745. By rotating the first adjusting knob 812, the lower adjusting disc 74 is driven to rotate. Since the friction coefficient of the second friction plate 78 is less than that of the first friction plate 77, at this time, the upper adjusting disc 73 remains stationary, thus achieving precise adjustment of the position of the second sensing block 747, and thus achieving precise adjustment of the stroke of the telescopic tube 52.

[0138] An adjustment window 31 is further opened on the outer diameter surface of the sleeve 3. A sealing ring is provided at the adjustment window 31 to be suitable for working conditions that require waterproofing. The position of the adjustment window 31 corresponds to the position of the lower switch base 61. At the same time, the width of the adjustment window 31 is adapted to the width from the lower switch base 61 to the pressing sleeve 751, facilitating the opening of the adjustment window 31 and quickly adjusting the stroke of the electric push rod. Especially for electric push rods that require frequent online adjustment of the stroke of the electric push rod, it is particularly applicable, solving the technical problems of inconvenient online adjustment of the stroke and slow adjustment speed in the prior art.

[0139] In practical applications, users can first adjust the minimum installation distance and then adjust the stroke.

[0140] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for online rapid adjustment of the stroke of an electric push rod, the electric push rod comprising a transmission assembly (4), a telescopic tube assembly (5), a detection assembly (7) and a fine adjustment assembly (8); The transmission assembly (4) includes a screw rod (42); The telescopic tube assembly (5) includes a telescopic tube (52); The detection component (7) comprises: An inner gear ring (71), a multi-stage reduction gear (72), an upper adjustment disk (73) and a lower adjustment disk (74); the input end of the multi-stage reduction gear (72) is meshed with the screw rod (42) for transmission, and the output end thereof is meshed with the first inner tooth (712) of the inner gear ring (71) for transmission, a first friction plate (77) is provided between the inner gear ring (71) and the upper adjustment disk (73); a second friction plate (78) is provided between the upper adjustment disk (73) and the lower adjustment disk (74); the friction coefficient of the second friction plate (78) is smaller than the friction coefficient of the first friction plate (77), and the inner gear ring (71) drives the upper adjustment disk (73) and the lower adjustment disk (74) to rotate synchronously in sequence; The upper regulating disk (73) is provided with a first external tooth (736), and a first sensing block (738) for sensing with a limit switch (64) is convexly provided on one side of the upper regulating disk (73). The inner diameter surface of the lower regulating disk (74) is provided with a second inner tooth (745), and the inner diameter of one end thereof is provided with a second sensing block (747) for sensing with the limit switch (64); It is characterized in that it includes the following steps: Quick adjustment of the minimum installation distance of the telescopic tube: open the cover of the adjustment window (31), turn the upper adjustment disk (73), change the distance between the first sensing block (738) on the upper adjustment disk (73) and the limit switch (64), and run the telescopic tube (52) of the motor to the minimum extension position to detect the minimum installation distance of the telescopic tube; Quick adjustment of the telescopic tube stroke: open the cover of the adjustment window (31), rotate the lower adjustment disk (74), keep the upper adjustment disk (73) stationary, change the relative position of the second sensing block (747) on the lower adjustment disk (74) and the limit switch (64), and move the telescopic tube (52) of the motor to the maximum extension position to detect the maximum travel distance of the telescopic tube.

2. The method for online rapid adjustment of electric push rod stroke according to claim 1, characterized in that: The invention also includes fine adjustment of the minimum installation distance of the telescopic tube. The second adjustment knob (822) is turned to drive the second adjustment rod (82) to move rightward, so that the second adjustment gear (821) and the first outer tooth (736) are engaged and transmitted. The second adjustment knob (822) is turned to change the position of the upper adjustment disk (73) relative to the limit switch (64), thereby completing the fine adjustment of the minimum installation distance of the telescopic tube.

3. The method for online rapid adjustment of electric push rod stroke according to claim 1, characterized in that: The invention also includes fine adjustment of the telescopic tube stroke: the first adjustment knob (812) is turned to drive the first adjustment rod (81) to move rightward, so that the first adjustment gear (811) is engaged with the second inner gear (745), and the first adjustment knob (812) is turned to drive the lower adjustment disk (74) to rotate, thereby changing the position of the lower adjustment disk (74) relative to the limit switch (64), thereby completing the fine adjustment of the telescopic tube stroke.

4. The method for online rapid adjustment of electric push rod stroke according to claim 3, characterized in that: In the telescopic tube stroke fine adjustment step, the friction coefficient of the second friction plate (78) is smaller than the friction coefficient of the first friction plate (77), and when the lower adjustment plate (74) is turned, the upper adjustment plate (73) remains stationary.

5. The method for online rapid adjustment of electric push rod stroke according to claim 2, characterized in that: In the minimum installation distance fine adjustment step, the friction coefficient of the second friction plate (78) is smaller than the friction coefficient of the first friction plate (77), and during the rotation of the upper adjustment plate (73), the lower adjustment plate (74) rotates synchronously with the upper adjustment plate (73).

6. The method for online rapid adjustment of electric push rod stroke according to claim 1, characterized in that: In the step of quickly adjusting the minimum installation distance of the telescopic tube, while the upper adjustment disk (73) is being toggled, the lower adjustment disk (74) is pressed to ensure that the lower adjustment disk (74) does not move.

7. The method for online rapid adjustment of electric push rod stroke according to claim 1, characterized in that: Scale lines for visually adjusting the distance are provided on the outside of the upper adjustment disk (73) and the lower adjustment disk (74).

8. An electric push rod, characterized in that: The stroke of the electric push rod is adjusted by using an online rapid adjustment method for the stroke of the electric push rod as described in any one of claims 1 to 7. The electric push rod comprises a housing (1), a sleeve (3), a transmission assembly (4), a telescopic tube assembly (5), a switch assembly (6), a detection assembly (7) and a fine adjustment assembly (8); The transmission assembly (4) includes a screw rod (42); The telescopic tube assembly (5) includes a telescopic tube (52); The detection assembly (7) includes: an inner gear ring (71), a multi-stage reduction gear (72), an upper adjustment disk (73) and a lower adjustment disk (74); the input end of the multi-stage reduction gear (72) is meshed with the screw rod (42) for transmission, and the output end thereof is meshed with the first inner tooth (712) of the inner gear ring (71) for transmission, and the inner gear ring (71) drives the upper adjustment disk (73) and the lower adjustment disk (74) to rotate synchronously in turn; The upper regulating disk (73) is provided with a first external tooth (736), and a first sensing block (738) for sensing with a limit switch (64) is convexly provided on one side of the upper regulating disk (73). The inner diameter surface of the lower regulating disk (74) is provided with a second inner tooth (745), and the inner diameter of one end thereof is provided with a second sensing block (747) for sensing with the limit switch (64); A first friction plate (77) is provided between the inner gear ring (71) and the upper adjustment plate (73); A second friction plate (78) is provided between the upper adjustment plate (73) and the lower adjustment plate (74); The friction coefficient of the second friction plate (78) is smaller than the friction coefficient of the first friction plate (77).

9. The electric linear actuator according to claim 8, characterized in that: The fine adjustment assembly (8) comprises a first adjustment rod (81) for adjusting the travel of the telescopic tube (52) and a second adjustment rod (82) for adjusting the minimum installation distance of the telescopic tube (52).

10. The electric linear actuator according to claim 9, characterized in that: A first adjusting gear (811) is provided at the end of the first adjusting rod (81); the first adjusting gear (811) is meshed with the second inner teeth (745) for transmission; a first adjusting knob (812) is also provided on the first adjusting rod (81); A second adjusting gear (821) is provided at the end of the second adjusting rod (82); the second adjusting gear (821) is meshed with the first outer teeth (736) for transmission; and a second adjusting knob (822) is also provided on the second adjusting rod (82).

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