Electric control single-column / double-column lifting machine and control method thereof

Abstract

The invention aims at disclosing an electric control single-column / double-column lifting machine and a control method thereof, and relates to the technical field of vehicle lifting, and the electric control single-column / double-column lifting machine comprises a lifting column, a lifting sliding table and a lifting arm; at least one electric control unlocking assembly is arranged on the lifting column; a plurality of lock teeth are arranged on one side of the lifting sliding table; the electric control unlocking assembly comprises a safety plate, an electromagnet and a micro-motion sensor. A first telescopic rod and a second telescopic rod are arranged at the two ends of the electromagnet respectively, the first telescopic rod drives the micro-motion sensor to be opened or closed, and the second telescopic rod drives the safety guard to swing; the lifting sliding table unlocking device has the technical effects that an electric control unlocking assembly is adopted for unlocking, specifically, the safety plate is controlled to swing through an electromagnet and a micro-motion sensor, the lifting sliding table is locked or unlocked, the unlocking structure is simplified, and reliability and stability are improved; the synchronism between the two lifting columns is guaranteed through the pull rope sensor and the hydraulic system, and lifting is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lifting, and in particular to an electrically controlled single-column / double-column lift and a control method thereof. Background Art

[0002] At present, the unlocking mechanism of the two-post lift is a mechanical lock. The unlocking mechanism between the two lifting posts is linked by a steel wire rope to ensure the synchronous unlocking or locking between the two lifts. The lifting height between the two lifting posts is mainly controlled by the hydraulic system. The synchronous unlocking or locking of the mechanical lock is related to the tightness of the steel wire rope. The operator needs to pay attention to and adjust the tightness of the steel wire rope in order to achieve synchronous unlocking or locking. There is a certain degree of difficulty in adjusting the steel wire rope. Ordinary operators are not competent. It requires people with considerable experience to adjust it, which brings great pressure to the after-sales work of the two-post lift and also affects the user experience. The single-post lift is used to lift small vehicles or heavy objects (such as engines or lithium batteries for vehicles), which also need to be unlocked or locked.

[0003] In view of this, it is necessary to develop a single-post / electrically controlled double-post lift and a control method thereof to overcome the above-mentioned defects. Summary of the invention

[0004] To solve the above technical problems, the purpose of the present invention is to disclose an electric-controlled two-post lift and a control method thereof.

[0005] The first object of the present invention is to provide an electrically controlled two-post lift.

[0006] The second invention object of the present invention is to provide an electrically controlled single-post lift. The third invention object of the present invention is to provide a control method for an electrically controlled single-post / double-post lift.

[0007] To achieve the above first invention objective, the present invention provides an electrically controlled two-post lift, comprising a lifting post, a lifting slide and a lifting arm;

[0008] At least one electrically controlled unlocking component is provided on the lifting column;

[0009] A plurality of locking teeth are arranged on one side of the lifting slide;

[0010] The electric control unlocking assembly includes a safety plate, an electromagnet and a micro motion sensor;

[0011] A first telescopic rod and a second telescopic rod are respectively provided at both ends of the electromagnet, the first telescopic rod drives the micro-motion sensor to open or close, and the second telescopic rod drives the safety plate to swing;

[0012] The safety plate cooperates with the locking teeth to achieve locking or unlocking.

[0013] Preferably, the maximum lifting height of the lifting slide is H or M, wherein H<M;

[0014] When the maximum lifting height of the lifting slide is H, an electric control unlocking component is arranged on the lifting column;

[0015] When the maximum lifting height of the lifting slide is M, two electric-controlled unlocking components are arranged on the lifting column.

[0016] Preferably, a vertical fixing plate is installed inside the lifting column, and at least one first L-shaped limit block is provided on the top of the vertical fixing plate;

[0017] A first inclined surface is arranged on the top of the insurance plate, a second inclined surface is arranged on the bottom of the insurance plate, and at least one first notch is arranged on the bottom of the insurance plate, and the first notch cooperates with the first L-shaped limit block;

[0018] A second notch is provided in the middle of the safety plate, and a first hole and a second hole are respectively provided on both sides of the second notch;

[0019] The second telescopic rod includes a first rod body, a second rod body and an end portion. The outer diameter of the second rod body is smaller than the outer diameter of the first rod body. The second rod body can pass through the first hole, while the first rod body cannot pass through the first hole. The end portion is located between the first hole and the second hole, while the end portion cannot pass through the first hole.

[0020] Preferably, an L-shaped plate is installed on the outside of the lifting column, and the micro-motion sensor is installed on the top of the L-shaped plate.

[0021] Preferably, a pull rope sensor is arranged below the L-shaped plate.

[0022] Preferably, it further comprises a hydraulic system, wherein the hydraulic system comprises a first hydraulic oil circuit and a second hydraulic oil circuit, and the first hydraulic oil circuit and the second hydraulic oil circuit synchronously lift the lifting slide;

[0023] The oil unloading speed of the first hydraulic oil circuit is lower than the oil unloading speed of the second hydraulic oil circuit.

[0024] Preferably, the first hydraulic oil circuit includes a first pressure compensation valve and a first two-position two-way solenoid valve, and the second hydraulic oil circuit includes a second pressure compensation valve and a second two-position two-way solenoid valve;

[0025] The oil unloading speed of the first pressure compensating valve is lower than the oil unloading speed of the second pressure compensating valve.

[0026] Preferably, the lifting arm is an M-arm or a telescopic arm.

[0027] Preferably, pressure sensors are provided at the oil outlets of the first hydraulic oil circuit and the second hydraulic oil circuit.

[0028] To achieve the above second invention objective, the present invention provides an electric-controlled single-post lift, comprising a lifting column, a lifting slide and a lifting arm;

[0029] At least one electrically controlled unlocking component is provided on the lifting column;

[0030] A plurality of locking teeth are arranged on one side of the lifting slide;

[0031] The electric control unlocking assembly includes a safety plate, an electromagnet and a micro motion sensor;

[0032] A first telescopic rod and a second telescopic rod are respectively arranged at both ends of the electromagnet, the first telescopic rod drives the micro-motion sensor to open or close, and the second telescopic rod drives the safety plate to swing;

[0033] The safety plate cooperates with the lock teeth to achieve locking or unlocking;

[0034] A vertical fixing plate is installed inside the lifting column, and at least one first L-shaped limiting block is arranged on the top of the vertical fixing plate;

[0035] A first inclined surface is arranged on the top of the insurance plate, a second inclined surface is arranged on the bottom of the insurance plate, and at least one first notch is arranged on the bottom of the insurance plate, and the first notch cooperates with the first L-shaped limit block;

[0036] A second notch is provided in the middle of the safety plate, and a first hole and a second hole are respectively provided on both sides of the second notch;

[0037] The second telescopic rod comprises a first rod body, a second rod body and an end portion, the outer diameter of the second rod body is smaller than the outer diameter of the first rod body, the second rod body can pass through the first hole, and the first rod body cannot pass through the first hole, and the end portion is located between the first hole and the second hole, and the end portion cannot pass through the first hole;

[0038] It also includes a hydraulic system, the hydraulic system includes a first hydraulic oil circuit and a second hydraulic oil circuit, the first hydraulic oil circuit and the second hydraulic oil circuit synchronously lift the lifting slide;

[0039] The oil unloading speed of the first hydraulic oil circuit is lower than the oil unloading speed of the second hydraulic oil circuit.

[0040] To achieve the third object of the invention, the present invention provides a control method for an electrically controlled single-post / double-post lift, comprising the following steps:

[0041] Press the lift up button, the electromagnet drives the micro-motion sensor to close, the safety plate is disengaged from the lock teeth, and the hydraulic system drives the lift up;

[0042] Press the lift stop button, the electromagnet drives the micro-motion sensor to open, and the safety plate engages with the lock teeth and locks;

[0043] Press the lift down button, the hydraulic system first drives the lift slide to rise 1mm-10mm, then the electromagnet drives the micro-motion sensor to close, the safety plate disengages from the lock tooth, and finally, the hydraulic system drives the lift slide to descend.

[0044] Compared with the prior art, the technical effects of the present invention are as follows:

[0045] The unlocking of the two-post lift of the present invention adopts an electrically controlled unlocking component, which specifically controls the swing of the safety plate through an electromagnet and a micro-motion sensor to achieve locking or unlocking of the lifting slide. The mechanical lock between the two lifting posts of the two-post lift linked by a wire rope is no longer used, the unlocking structure is simplified, and there is no need to adjust the tightness of the wire rope, and the reliability and stability of the electrically controlled unlocking component are increased; the synchronization between the two lifting posts is guaranteed by a pull rope sensor and a hydraulic system, and the lifting is stable; the unlocking of the single-post lift of the present invention adopts an electrically controlled unlocking component, which increases the reliability and stability of locking or unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 It is a schematic diagram of the three-dimensional structure of the electric-controlled double-post lift of the present invention.

[0048] Figure 2 It is a side view schematic diagram of the electric-controlled two-post lift of the present invention.

[0049] Figure 3 The present invention Figure 2 Schematic diagram of the cross-sectional view at AA.

[0050] Figure 4 The present invention Figure 3 A is an enlarged structural diagram of FIG.

[0051] Figure 5 It is a schematic diagram of the three-dimensional structure of the electric-controlled double-post lift of the present invention.

[0052] Figure 6 It is a side view schematic diagram of the electric-controlled two-post lift of the present invention.

[0053] Figure 7 The present invention Figure 6 Schematic diagram of the cross-section at BB.

[0054] Figure 8 The present invention Figure 7 Schematic diagram of the enlarged structure at B.

[0055] Fig. 9 It is a schematic diagram of the meshing state of the safety plate and the lock teeth of the present invention.

[0056] Fig.10 It is a schematic diagram of the exploded structure of the electric control unlocking component of the present invention.

[0057] Fig.11 It is a schematic diagram of the hydraulic system of the present invention.

[0058] Fig.12 It is a flow chart of the control method of the electric-controlled two-post lift of the present invention.

[0059] Among them, 1. lifting column; 11. vertical fixing plate; 12. first L-shaped limit block; 2. lifting slide; 21. locking tooth; 3. lifting arm; 4. electric control unlocking assembly; 41. safety plate; 411. first inclined plane; 412. second inclined plane; 413. first notch; 414. second notch; 4141. first hole; 4142. second hole; 42. electromagnet; 43. micro motion sensor; 44. first telescopic rod; 45. second telescopic rod; 451. first rod body; 452. second rod body; 453. end; 5. L-shaped plate; 6. pull rope sensor; 7. hydraulic system; 71. first pressure compensation valve; 72. first two-position two-way solenoid valve; 73. second pressure compensation valve; 74. second two-position two-way solenoid valve; 75. pressure sensor. DETAILED DESCRIPTION

[0060] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0061] 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 indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0062] Embodiment 1

[0063] Ginseng Figures 1 to 4 , Figures 9 and 10 , this embodiment discloses a specific implementation of an electric-controlled two-post lift.

[0064] Electric two-post lift, reference Figures 1 to 4 , Figures 9 and 10 , including a lifting column 1, a lifting slide 2 and a lifting arm 3, the lifting arm is an M arm, and the maximum lifting height of the lifting slide 2 is H; an electric-controlled unlocking component 4 is arranged on the lifting column 1; a plurality of locking teeth 21 are arranged on one side of the lifting slide 2; the electric-controlled unlocking component 4 includes a safety plate 41, an electromagnet 42 and a micro-motion sensor 43, and the micro-motion sensor 43 can be a micro-switch; a first telescopic rod 44 and a second telescopic rod 45 are respectively arranged at both ends of the electromagnet 42, the first telescopic rod 44 drives the micro-motion sensor 43 to open or close, and the second telescopic rod 45 drives the safety plate 41 to swing; the safety plate 41 cooperates with the locking teeth 21 to achieve locking or unlocking.

[0065] Specifically, refer to Figures 1 to 4 There is no wire rope linkage between the lifting columns 1 on both sides of the double-column lift. Each lifting column 1 is provided with an independent electric-controlled unlocking component 4. During the rising or falling process, the first telescopic rod 44 of the electromagnet 42 controls the opening or closing of the micro-motion sensor 43, and then the extension and retraction of the second telescopic rod 45 is controlled by the micro-motion sensor 43, so that the second telescopic rod 45 drives the safety plate 41 to swing to achieve locking or unlocking. Compared with the traditional wire rope linkage locking or unlocking, the electric-controlled unlocking component 4 has the advantages of high efficiency and flexibility, easy maintenance and no need to adjust the tightness of the wire rope.

[0066] Ginseng Figures 9 and 10The working principle of the electric unlocking assembly 4 is as follows: an L-shaped plate 5 is installed on the outer side of the lifting column 1, the micro-motion sensor 43 is installed on the top of the L-shaped plate 5, and the first telescopic rod 44 is aligned with the micro-motion sensor 43. When the two-column lift receives a rising command, the first telescopic rod 44 is in a retracted state, the micro-motion sensor 43 is not triggered by the first telescopic rod 44, and the second telescopic rod 45 is also in a retracted state and pulls the safety plate 41 to swing out of engagement with the lock tooth 21, thereby realizing the continuous rise of the lifting slide 2; when the two-column lift receives a stop command, the electromagnet 42 is turned on, and the electromagnet 42 drives the first The telescopic rod 44 extends and triggers the micro-motion sensor 43, which in turn controls the second telescopic rod 45 to extend and drive the safety plate 41 to swing to engage with the lock tooth 21 to achieve locking; when the two-post lift receives a descending command, the lifting slide 2 first rises slightly for a short distance so that the safety plate 41 is no longer subjected to downward pressure, the electromagnet 42 is closed, the first telescopic rod 44 retracts and disconnects the micro-motion sensor 43, and the micro-motion sensor 43 controls the second telescopic rod 45 to retract and pull back the safety plate 41, so that the safety plate 41 swings to disengage from the lock tooth 21, allowing the lifting slide 2 to descend.The swinging principle of the insurance plate 41 is as follows: a vertical fixing plate 11 is installed on the inner side of the lifting column 1, and at least one first L-shaped limit block 12 is arranged on the top of the vertical fixing plate 11. The number of the first L-shaped limit blocks 12 is set according to the width of the insurance plate 41. The larger the width of the insurance plate 41, the more the number of the first L-shaped limit blocks 12 is, so as to ensure that the insurance plate 41 swings smoothly; a first inclined surface 411 is arranged on the top of the insurance plate 41, and the purpose of the first inclined surface 411 is to engage with the locking tooth 21; a second inclined surface 412 is arranged on the bottom of the insurance plate 41, and the second inclined surface 412 cooperates with the plane at the top of the vertical fixing plate 11 to determine the swinging amplitude of the insurance plate 41. When the insurance plate 41 and the locking tooth 21 are engaged, the second inclined surface 412 fits the plane at the top of the vertical fixing plate 11; at least one first notch 413 is arranged on the bottom of the insurance plate 41, and the first notch 413 cooperates with the first L-shaped limit block 12, and the insurance plate 41 swings to make the first notch 413 swings along the first L-shaped limit block 12; a second notch 414 is set in the middle of the safety plate 41, and a first hole 4141 and a second hole 4142 are respectively set on both sides of the second notch 414, the second telescopic rod 45 includes a first rod body 451, a second rod body 452 and an end 453, the end 453 is a circular cap, the outer diameter of the second rod body 452 is smaller than the outer diameter of the first rod body 451, the second rod body 452 can pass through the first hole 4141, the first rod body 452 cannot pass through the first hole 4141, the end 453 is located between the first hole 4141 and the second hole 4142, and the end 453 cannot pass through the first hole 4141; when the second telescopic rod 45 drives the safety plate 41 to approach the lock tooth 21, it is achieved by the first rod body 452 pushing the first hole 4141; when the second telescopic rod 45 drives the safety plate 41 away from the lock tooth 21, it is achieved by pulling the first hole 4141 through the end 453.

[0067] The synchronization principle between the lifting columns 1 on both sides of the double-column lift is as follows: a pull-wire sensor 6 is set below the L-shaped plate 5, that is, each lifting column 1 is provided with a pull-wire sensor 6, and the pull-wire sensor 6 is used to monitor the real-time height of the lifting slide 2 in real time. When the heights of the pull-wire sensors 6 of the two lifting columns 1 are inconsistent, they are compensated in real time through the independent hydraulic system 7 of each lifting column 1. The compensation principle is as follows: See Fig.11The hydraulic system 7 includes a first hydraulic oil circuit and a second hydraulic oil circuit, and the first hydraulic oil circuit and the second hydraulic oil circuit synchronously lift the lifting slide 2; the unloading speed of the first hydraulic oil circuit is lower than the unloading speed of the second hydraulic oil circuit. During the lifting process, the hydraulic system of the lifting column 1 that rises faster is adjusted. If a slight asynchronism of 1mm-10mm occurs, compensation is achieved by unloading the oil of the second hydraulic oil circuit. If a larger asynchronism greater than 10mm occurs, compensation is achieved by unloading the oil of the first hydraulic oil circuit; specifically, the first hydraulic oil circuit includes a first pressure compensating valve 71 and a first two-position two-way solenoid valve 72, and the second hydraulic oil circuit includes a second pressure compensating valve 73 and a second two-position two-way solenoid valve 74; the unloading speed of the first pressure compensating valve 71 is lower than the unloading speed of the second pressure compensating valve 73. By controlling the unloading speeds of the first pressure compensating valve 71 and the second pressure compensating valve 73, the height of the lifting slide 2 can be fine-tuned or quickly adjusted, thereby ensuring the synchronization between the lifting columns 1 on both sides of the double-column lift.

[0068] See also Fig.11 In order to prevent the two-post lift from being overloaded or lifting unbalanced, a pressure sensor 75 is provided at the oil outlet of the first hydraulic oil circuit and the second hydraulic oil circuit. When the pressure sensor 75 is overloaded, it indicates that the two-post lift is seriously overloaded or unbalanced, and the lift is controlled to stop working to ensure safety.

[0069] Embodiment 2

[0070] The difference from the first embodiment is that, see Figures 5 to 10 In the second embodiment, the lifting arm is a telescopic arm, and the maximum lifting height of the lifting slide 2 is M, M is greater than H. During the lifting process of the lifting slide 2, a single electric-controlled unlocking component 4 cannot meet its lifting height. Two electric-controlled unlocking components 4 are arranged on the lifting column 1, one is located at a lower position of the lifting column 1, and the other is located at a higher position of the lifting column 1. The two electric-controlled unlocking components 4 are unlocked or locked synchronously. Through the relay of the two electric-controlled unlocking components 4, the lifting slide 2 can complete a higher lifting height to meet the needs of a two-column lift with different lifting strokes.

[0071] The electric-controlled two-post lift of the second embodiment is similar to that of the first embodiment, please refer to the first embodiment, and will not be repeated here.

[0072] Embodiment 3

[0073] The difference from the first or second embodiment is that the third embodiment is an electric-controlled single-column lift, which has only one lifting column and a set of lifting arms, that is, one of the lifting columns and a set of lifting arms in the first or second embodiment, but the third embodiment also adopts the same electric-controlled unlocking components and hydraulic systems as the first or second embodiment, specifically: the electric-controlled single-column lift includes a lifting column 1, a lifting slide 2 and a lifting arm 3; at least one electric-controlled unlocking component 4 is arranged on the lifting column; a plurality of locking teeth 21 are arranged on one side of the lifting slide 2; the electric-controlled unlocking component 4 includes a safety plate 41, an electromagnet 42 and a micro-motion sensor 43; the first telescopic rod 44 and the second telescopic rod 43 are respectively arranged at both ends of the electromagnet 42. The retractable rod 45, the first telescopic rod 44 drives the micro-motion sensor 43 to open or close, and the second telescopic rod 45 drives the safety plate 41 to swing; the safety plate 41 cooperates with the lock tooth 21 to achieve locking or unlocking; a vertical fixed plate 11 is installed on the inner side of the lifting column 1, and at least one first L-shaped limit block 12 is arranged on the top of the vertical fixed plate 11. The number of the first L-shaped limit blocks 12 is set according to the width of the safety plate 41. The larger the width of the safety plate 41, the more the number of the first L-shaped limit blocks 12 is, so as to ensure that the safety plate 41 swings smoothly; a first inclined surface 411 is arranged on the top of the safety plate 41. The purpose of the first inclined surface 411 is to achieve meshing with the lock tooth 21. The safety plate A second inclined surface 412 is provided at the bottom of the safety plate 41, and the second inclined surface 412 cooperates with the plane at the top of the vertical fixing plate 11 to determine the swing amplitude of the safety plate 41. When the safety plate 41 and the lock tooth 21 are engaged, the second inclined surface 412 fits the plane at the top of the vertical fixing plate 11; at least one first notch 413 is provided at the bottom of the safety plate 41, and the first notch 413 cooperates with the first L-shaped limit block 12. When the safety plate 41 swings, the first notch 413 swings along the first L-shaped limit block 12; a second notch 414 is provided in the middle of the safety plate 41, and a first hole 4141 and a second hole 4142 are respectively provided on both sides of the second notch 414, and the second telescopic rod 45 includes a first rod body 451, a second rod body 452 and an end 453, the end 453 is a round cap, the outer diameter of the second rod body 452 is smaller than the outer diameter of the first rod body 451, the second rod body 452 can pass through the first hole 4141, the first rod body 452 cannot pass through the first hole 4141, the end 453 is located between the first hole 4141 and the second hole 4142, and the end 453 cannot pass through the first hole 4141; when the second telescopic rod 45 drives the safety plate 41 to approach the lock tooth 21, the first hole 4141 is pushed by the first rod body 452; when the second telescopic rod 45 drives the safety plate 41 away from the lock tooth 21, the first hole 4141 is pulled by the end 453.

[0074] The electric-controlled single-column lift also includes a hydraulic system, which includes a first hydraulic oil circuit and a second hydraulic oil circuit. The first hydraulic oil circuit and the second hydraulic oil circuit synchronously lift the lifting slide 2; the oil discharge speed of the first hydraulic oil circuit is less than the oil discharge speed of the second hydraulic oil circuit. Specifically, the first hydraulic oil circuit includes a first pressure compensation valve 71 and a first two-position two-way solenoid valve 72, and the second hydraulic oil circuit includes a second pressure compensation valve 73 and a second two-position two-way solenoid valve 74; the oil discharge speed of the first pressure compensation valve 71 is less than the oil discharge speed of the second pressure compensation valve 73, and the height of the lifting slide 2 can be fine-tuned or quickly adjusted by controlling the oil discharge speeds of the first pressure compensation valve 71 and the second pressure compensation valve 73.

[0075] The electric-controlled single-post lift of the third embodiment is similar to the first and second embodiments, please refer to the first and second embodiments, which will not be described again here.

[0076] Embodiment 4

[0077] Ginseng Fig.12 This embodiment discloses a specific implementation method of a control method for an electrically controlled single-post / double-post lift.

[0078] Control method of electric single-post / double-post lift, see Fig.12 , including the following steps:

[0079] Step S1: Press the lift up button, the electromagnet drives the micro-motion sensor to close, the safety plate is disengaged from the lock teeth, and the hydraulic system drives the lift up;

[0080] Step S2: Press the stop button of the lift, the electromagnet drives the micro-motion sensor to open, and the safety plate engages with the lock teeth and locks;

[0081] Step S3: Press the lift lowering button, the hydraulic system first drives the lift to rise 1mm-10mm, then the electromagnet drives the micro-motion sensor to close, the safety plate disengages from the lock tooth, and finally, the hydraulic system first drives the lift to descend.

[0082] Specifically, refer to Figures 9 and 10The working principle of the electric unlocking assembly 4 is as follows: when the single-column / double-column lift receives a rising command, the first telescopic rod 44 is in a retracted state, the micro-motion sensor 43 is not triggered by the first telescopic rod 44, and the second telescopic rod 45 is also in a retracted state and pulls the safety plate 41 to swing out of engagement with the lock tooth 21, thereby achieving continuous ascent of the lifting slide 2; when the single-column / double-column lift receives a stop command, the electromagnet 42 is turned on, the electromagnet 42 drives the first telescopic rod 44 to extend and trigger the micro-motion sensor 43, and the micro-motion sensor 43 then controls the second telescopic rod 45 to extend. The retractable rod 45 extends out and drives the safety plate 41 to swing to engage with the lock tooth 21 to achieve locking; when the single-column / double-column lift receives a descending command, the lifting slide 2 first rises slightly for a short distance, such as 1mm-10mm, so that the safety plate 41 is no longer subjected to downward pressure, the electromagnet 42 is closed, the first telescopic rod 44 retracts and the micro-motion sensor 43 is disconnected, and the micro-motion sensor 43 then controls the second telescopic rod 45 to retract and pull back the safety plate 41, so that the safety plate 41 swings to disengage from the lock tooth 21, allowing the lifting slide 2 to descend.

[0083] The control method of the fourth embodiment controls the electrically controlled single-post / double-post lift described in the first, second or third embodiment. The working principle of the electrically controlled single-post / double-post lift can be found in the first, second or third embodiment, and will not be described in detail here.

Claims

1. Electric controlled two-post lift, characterized in that: Including lifting column, lifting slide and lifting arm; At least one electrically controlled unlocking component is provided on the lifting column; A plurality of locking teeth are arranged on one side of the lifting slide; The electric control unlocking assembly includes a safety plate, an electromagnet and a micro motion sensor; A first telescopic rod and a second telescopic rod are respectively provided at both ends of the electromagnet, the first telescopic rod drives the micro-motion sensor to open or close, and the second telescopic rod drives the safety plate to swing; The safety plate cooperates with the locking teeth to achieve locking or unlocking.

2. The electric controlled two-post lift according to claim 1, characterized in that: The maximum lifting height of the lifting slide is H or M, where H<M; When the maximum lifting height of the lifting slide is H, an electric control unlocking component is arranged on the lifting column; When the maximum lifting height of the lifting slide is M, two electric-controlled unlocking components are arranged on the lifting column.

3. The electric controlled two-post lift according to claim 1 or 2, characterized in that: A vertical fixing plate is installed inside the lifting column, and at least one first L-shaped limiting block is arranged on the top of the vertical fixing plate; A first inclined surface is arranged on the top of the insurance plate, a second inclined surface is arranged on the bottom of the insurance plate, and at least one first notch is arranged on the bottom of the insurance plate, and the first notch cooperates with the first L-shaped limit block; A second notch is provided in the middle of the safety plate, and a first hole and a second hole are respectively provided on both sides of the second notch; The second telescopic rod includes a first rod body, a second rod body and an end portion. The outer diameter of the second rod body is smaller than the outer diameter of the first rod body. The second rod body can pass through the first hole, while the first rod body cannot pass through the first hole. The end portion is located between the first hole and the second hole, while the end portion cannot pass through the first hole.

4. The electric controlled two-post lift according to claim 1 or 2, characterized in that: An L-shaped plate is installed on the outer side of the lifting column, and the micro-motion sensor is installed on the top of the L-shaped plate.

5. The electric controlled two-post lift according to claim 4, characterized in that: A pull rope sensor is arranged below the L-shaped plate.

6. The electric controlled two-post lift according to claim 5, characterized in that: It also includes a hydraulic system, the hydraulic system includes a first hydraulic oil circuit and a second hydraulic oil circuit, the first hydraulic oil circuit and the second hydraulic oil circuit synchronously lift the lifting slide; The oil unloading speed of the first hydraulic oil circuit is lower than the oil unloading speed of the second hydraulic oil circuit.

7. The electric controlled two-post lift according to claim 6, characterized in that: The first hydraulic oil circuit includes a first pressure compensation valve and a first two-position two-way solenoid valve, and the second hydraulic oil circuit includes a second pressure compensation valve and a second two-position two-way solenoid valve; The oil unloading speed of the first pressure compensating valve is lower than the oil unloading speed of the second pressure compensating valve.

8. The electric controlled two-post lift according to claim 1 or 2, characterized in that: The lifting arm is an M arm or a telescopic arm; and pressure sensors are arranged at the oil outlets of the first hydraulic oil circuit and the second hydraulic oil circuit.

9. Electric controlled single-post lift, characterized in that: Including lifting column, lifting slide and lifting arm; At least one electrically controlled unlocking component is provided on the lifting column; A plurality of locking teeth are arranged on one side of the lifting slide; The electric control unlocking assembly includes a safety plate, an electromagnet and a micro motion sensor; A first telescopic rod and a second telescopic rod are respectively provided at both ends of the electromagnet, the first telescopic rod drives the micro-motion sensor to open or close, and the second telescopic rod drives the safety plate to swing; The safety plate cooperates with the lock teeth to achieve locking or unlocking; A vertical fixing plate is installed inside the lifting column, and at least one first L-shaped limiting block is arranged on the top of the vertical fixing plate; A first inclined surface is arranged on the top of the insurance plate, a second inclined surface is arranged on the bottom of the insurance plate, and at least one first notch is arranged on the bottom of the insurance plate, and the first notch cooperates with the first L-shaped limit block; A second notch is provided in the middle of the safety plate, and a first hole and a second hole are respectively provided on both sides of the second notch; The second telescopic rod comprises a first rod body, a second rod body and an end portion, the outer diameter of the second rod body is smaller than the outer diameter of the first rod body, the second rod body can pass through the first hole, and the first rod body cannot pass through the first hole, and the end portion is located between the first hole and the second hole, and the end portion cannot pass through the first hole; It also includes a hydraulic system, the hydraulic system includes a first hydraulic oil circuit and a second hydraulic oil circuit, the first hydraulic oil circuit and the second hydraulic oil circuit synchronously lift the lifting slide; The oil unloading speed of the first hydraulic oil circuit is lower than the oil unloading speed of the second hydraulic oil circuit.

10. A control method for an electrically controlled single-post / double-post lift, characterized in that: The following steps are involved: Press the lift up button, the electromagnet drives the micro-motion sensor to close, the safety plate is disengaged from the lock teeth, and the hydraulic system drives the lift up; Press the lift stop button, the electromagnet drives the micro-motion sensor to open, and the safety plate engages with the lock teeth and locks; Press the lift down button, the hydraulic system first drives the lift slide to rise 1mm-10mm, then the electromagnet drives the micro-motion sensor to close, the safety plate disengages from the lock tooth, and finally, the hydraulic system drives the lift slide to descend.

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