Toggle type jacking structure

Abstract

The utility model discloses a toggle type jacking structure which comprises a mounting table top, a jacking plate, a bearing seat, a lead screw, a first connecting seat, a second connecting seat, a toggle connecting piece and a driving motor. A guide bearing is vertically arranged on the mounting table top, and the upper end of the guide bearing is connected to the bottom face of the jacking plate. The two bearing seats are arranged on the left side and the right side of the mounting table top. And a screw body of the screw is provided with two ball screw nuts. The first connecting seat comprises two ball screw nuts which are respectively fixed on the lead screw. The two second connecting bases are fixed to the two sides of the bottom face of the jacking plate correspondingly. The upper end and the lower end of each toggle joint connecting piece are movably connected to the first connecting base and the second connecting base on the same side correspondingly. The driving motor drives the lead screw to rotate forwards and backwards, drives the first connecting bases to move in the same direction or in the back-to-back direction, and drives the toggle connecting pieces to move to achieve ascending or descending of the jacking plate.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical lifting, in particular to a toggle type lifting structure. Background Art

[0002] In the circuit board production industry, "airbag vacuum hot press" is usually used to heat and press the board. "Airbag vacuum hot press" is also used in semiconductor packaging, MiniLED / MicroLED display module packaging, MIP packaging, etc. The existing "airbag vacuum hot press" generally uses a hydraulic cylinder system as a lifting device ( Figure 7 As shown in the figure, the hot press includes the following working process: lift the lower template (and the product in the template) to be pressed → lift it to a fixed height → bear the airbag pressurization → lower it after pressure relief. The cylinder lifting system includes an oil pump, valves, pipes, and oil cylinders. Its disadvantages are as follows: 1. The motor power of the oil pump is usually >3.7KW, and the energy consumption is high. 2. The oil circuit part has the risk of damage and oil leakage after aging for a long time, which will cause pollution to the dust-free environment of the semiconductor and LED industries. 3. The hydraulic oil in the oil pump needs to be replaced at regular intervals, and the maintenance cost is high. 4. The weight of the entire cylinder system exceeds 500KG, which is heavy, which increases the total weight of the equipment and has high transportation and handling costs. To this end, it is necessary to optimize and improve the lifting structure of the existing pressing machine to solve the above problems. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model proposes a toggle-type lifting structure, which solves the problems that the existing pressing machine lifting structure uses a hydraulic cylinder that is bulky, has high energy consumption, high maintenance and transportation costs, and has oil leakage that pollutes the machine tool and products.

[0004] The technical solution disclosed in the utility model is a toggle type lifting structure, comprising a mounting table, a lifting plate, a bearing seat, a lead screw, a first connecting seat, a second connecting seat, a toggle connecting piece, and a driving motor. The mounting table is vertically provided with a guide bearing, and the guide bearings include at least four guide bearings, which are evenly and vertically arranged at the edge of the mounting table; the upper end of the guide bearing is vertically connected to the bottom surface of the lifting plate; the bearing seat includes at least two, which are respectively arranged at the middle position of the left and right sides of the mounting table and arranged in a straight line; the lead screw is assembled on the bearing seat, and two ball screw nuts are arranged on the lead screw; the first connecting seat includes two, each fixed on a ball screw nut; the second connecting seat includes two, which are respectively fixed on both sides of the bottom surface of the lifting plate; the toggle connecting piece includes two groups, and the upper and lower ends are respectively movably connected to the first connecting seat and the second connecting seat on the same side; the driving motor drives the lead screw to rotate forward and reverse, drives the ball screw nut and the first connecting seat on the lead screw to move toward or away from each other, and drives the toggle connecting piece to move to realize the lifting or lowering of the lifting plate.

[0005] Furthermore, the drive motor adopts a servo motor or a stepper motor, which is fixed in the middle of the mounting table. The output shaft of the drive motor is perpendicular to the lead screw. A first bevel gear is provided at the front end of the output shaft of the drive motor, and a second bevel gear meshing with the first bevel gear is provided on the lead screw.

[0006] In one of the schemes, the screw adopts a bidirectional screw, which adopts the same screw, half of the screw body is provided with a left-handed screw, and the other half of the screw body is provided with a right-handed screw, or the bidirectional screw is composed of a left-handed screw and a right-handed screw, and the second bevel gear is arranged near the middle of the bidirectional screw.

[0007] In another embodiment, the lead screw is two identical single-rotation lead screws arranged with the same central axis, and one second bevel gear is respectively arranged at the opposite ends of the two single-rotation lead screws, and the first bevel gear synchronously drives the two second bevel gears.

[0008] Furthermore, a dustproof box is provided at the front end of the drive motor, a first through hole passing through the output shaft of the drive motor is provided on the front side of the dustproof box, a second through hole and a third through hole are provided on the left and right sides of the dustproof box to cross the lead screw, and ball bearings are embedded in the first through hole, the second through hole and the third through hole.

[0009] The elbow joint connecting piece further includes a first cylinder, a second cylinder, and a connecting block, the upper and lower edges of the connecting block are respectively connected to the side walls of the first cylinder and the second cylinder, a C-shaped circular groove is horizontally provided on the first connecting seat and the second connecting seat, the first cylinder and the second cylinder are respectively inserted into the notches of the C-shaped circular groove of the first connecting seat and the C-shaped circular groove of the second connecting seat, and the first cylinder and the second cylinder rotate circumferentially in the C-shaped circular groove as the first connecting seat moves left and right on the bidirectional screw.

[0010] Furthermore, the notches of the C-shaped circular grooves of the first connecting seat and the second connecting seat are provided with pressure covers fixedly connected by screws, and the pressure covers are used to limit the first cylinder and the second cylinder from moving out of the C-shaped circular grooves.

[0011] Furthermore, a slot-type photoelectric switch is provided on one side wall corresponding to one of the slots of the C-shaped circular groove of the first connecting seat, and the slot-type photoelectric switch is used to sense the initial position of the first connecting seat, which is the lower limit position state of the lifting plate when it is descending.

[0012] Furthermore, a stop column is arranged on the installation table, and the stop column is arranged on the rear side when the first connecting seat runs to the initial position.

[0013] The beneficial effects of the utility model are as follows: the elbow-type lifting structure designed by the technical solution adopts a lead screw, and a driving motor drives the lead screw to rotate, thereby driving the first connecting seat on the lead screw to open and close toward or away from each other, so that the elbow connecting parts on the first connecting seat and the second connecting seat change from an inclined state to a vertical state, thereby lifting the lifting plate. The power of the driving motor of this solution is 0.75KW, compared with the motor power of the oil pump using the oil cylinder, which is usually greater than 3.7KW, and this solution saves 80% energy. In addition, the structural design of this solution is much lighter than that of the hydraulic cylinder, saving transportation and installation costs, and there is no problem of oil leakage in the oil circuit polluting the machine tool and products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereoscopic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the connection between the first connecting seat, the second connecting seat and the toggle connecting piece of the utility model.

[0016] Figure 3 It is a schematic structural diagram of an embodiment of the connection between the output shaft of the driving motor and the bidirectional lead screw of the utility model.

[0017] Figure 4 It is a schematic diagram of an embodiment of the connection between the output shaft of the driving motor and two single-rotating screws of the utility model.

[0018] Figure 5 This is a schematic diagram of the first connecting seats of the utility model moving toward each other and the lifting plates descending.

[0019] Figure 6 This is a schematic diagram of the lifting plate rising when the first connecting seats of the utility model move back to back.

[0020] Figure 7 It is a three-dimensional diagram of the overall structure of the jacking plate of the utility model when it rises to the highest position.

[0021] Figure 8 This is a schematic diagram of an embodiment of the prior art using a hydraulic cylinder to achieve lifting.

[0022] Figure numerals: 1. Mounting table; 2. Guide bearing; 3. Lifting plate; 4. Bearing seat; 5. Screw; 5-1. Single-rotation screw; 6. Driving motor; 7. Ball screw nut; 8. First connecting seat; 9. Second connecting seat; 10. First cylinder; 11. Second cylinder; 12. Connecting block; 13. Pressure cover; 14. Groove-type photoelectric sensor; 15. Baffle; 16. Dustproof box; 17. First bevel gear; 18. Second bevel gear; 19. Stop column. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] Please refer to Figures 1 to 7 , is an embodiment of a toggle-type lifting structure provided by the technical solution, the toggle-type lifting structure includes a mounting table 1, a lifting plate 3, a bearing seat 4, a lead screw 5, a first connecting seat 8, a second connecting seat 9, a toggle connecting piece, and a driving motor 6. The mounting table 1 is vertically provided with a guide bearing 2, the guide bearing 2 includes at least four, and the guide bearings 2 are evenly and vertically arranged at the edge of the mounting table 1; the upper end of the guide bearing 2 is vertically connected to the bottom surface of the lifting plate 3; the bearing seats 4 include at least two, which are respectively arranged at the middle position of the left and right sides of the mounting table 1, and are arranged in a straight line. The lead screw 5 is mounted on the bearing seat 4, and two ball screw nuts 7 are arranged on the lead screw 5; the first connecting seat 8 includes two, each of which is fixed on a ball screw nut 7; the second connecting seat 9 includes two, which are respectively fixed on both sides of the bottom surface of the lifting plate 3; the toggle connecting piece includes two groups, and the upper and lower ends are respectively movably connected to the first connecting seat 8 and the second connecting seat 9 on the same side; the driving motor 6 drives the lead screw 5 to rotate forward and reverse, drives the ball screw nut 7 and the first connecting seat 8 on the lead screw 5 to move toward or away from each other, and drives the toggle connecting piece to move to realize the raising or lowering of the lifting plate 3.

[0027] Reference Figure 5 , Figure 6 The present technical solution replaces the traditional structure using a hydraulic cylinder as a jacking structure, and adopts a screw 5. A drive motor 6 drives the screw 5 to rotate, thereby driving the first connecting seat 8 on the screw 5 to open and close toward or away from each other, so that the elbow joint connecting parts on the first connecting seat 8 and the second connecting seat 9 are changed from an inclined state to a vertical state, thereby lifting the jacking plate 3.

[0028] Take "airbag vacuum heat press" as an example, refer to Figure 8 This is a schematic diagram of an embodiment of a jacking structure of the prior art. The movement law of the equipment is: jacking up the lower template → statically bearing the airbag pressure → descending after depressurization. The load for jacking and descending is: the weight of the lower template, and the load when static is: the weight of the lower template + the airbag pressure. The weight of the lower template is about 300KG (the hydraulic cylinder occupies most of the weight), and the airbag pressure is usually 7000KG to 46000KG or even greater. This solution designs a toggle-type jacking mechanism: using a 0.75KW servo motor + ball screw drive, a toggle jacking structure, and the weight of the entire system is less than 50KG. It solves the shortcomings of high energy consumption of the hydraulic system, oil pipe damage and oil leakage, the need to replace the hydraulic oil, and the heavy weight.

[0029] Preferably, the drive motor 6 is a servo motor or a stepper motor, and the drive motor 6 is fixed in the middle of the mounting table 1. The output shaft of the drive motor 6 is perpendicular to the lead screw 5. A first bevel gear 17 is provided at the front end of the output shaft of the drive motor 6, and a second bevel gear 18 meshing with the first bevel gear 17 is provided on the lead screw 5. This solution sets the drive motor 6 in the middle of the mounting table 1, so that the drive motor 6 does not occupy external space, which is more conducive to saving space.

[0030] Reference Figure 3 As a connection drive embodiment of the lead screw 5 and the output shaft of the drive motor 6, the lead screw 5 adopts a bidirectional lead screw, the bidirectional lead screw adopts the same lead screw, half of the lead screw body is provided with a left-handed thread, and the other half of the lead screw body is provided with a right-handed thread, or the bidirectional lead screw is composed of a left-handed lead screw and a right-handed lead screw, and the second bevel gear 18 is arranged near the middle of the bidirectional lead screw.

[0031] Reference Figure 4 As a connection drive embodiment of a screw 5 and an output shaft of a driving motor 6, the screw 5 adopts two identical single-rotation screws 5-1 arranged with the same central axis, and a second bevel gear 18 is respectively arranged at the opposite ends of the two single-rotation screws 5-1. The first bevel gear 17 synchronously drives the two second bevel gears 18 to drive the single-rotation screws 5-1 to rotate synchronously, and the rotation direction is realized in that one is clockwise and the other is counterclockwise, thereby realizing the opening and closing operation of the first connecting seat 8 on the screw 5 and driving the lifting plate 3 to rise or fall.

[0032] Preferably, refer to Figure 3A dustproof box 16 is provided at the front end of the drive motor 6, and a first through hole is provided on the front side of the dustproof box 16 to pass through the output shaft of the drive motor 6. A second through hole and a third through hole are provided on the left and right sides of the dustproof box 16 to cross the lead screw 5. Ball bearings are embedded in the first through hole, the second through hole and the third through hole. The setting of the dustproof box 16 is conducive to the meshing operation of the first bevel gear 17 of the output shaft of the drive motor 6 and the second bevel gear 18 of the lead screw 5 without falling into dust, debris, etc. to cause a stuck gear device failure.

[0033] Preferably, refer to Figure 1 and Figure 2 The toggle connector includes a first cylinder 10, a second cylinder 11, and a connecting block 12. The upper and lower sides of the connecting block 12 are connected to the side walls of the first cylinder 10 and the second cylinder 11, respectively. The first connecting seat 8 and the second connecting seat 9 are horizontally provided with a C-shaped circular groove. The first cylinder 10 and the second cylinder 11 are respectively inserted from the notches of the C-shaped circular groove of the first connecting seat 8 and the C-shaped circular groove of the second connecting seat 9. The first cylinder 10 and the second cylinder 11 rotate circumferentially in the C-shaped circular groove as the first connecting seat 8 moves left and right on the bidirectional lead screw 5. The first cylinder 10 and the second cylinder 11 are horizontally arranged parallel to each other and connected in the middle by a connecting block 12. The connection using the connecting block 12 is a "surface-like" support. Compared with the "point-like" support using the support column connection, the supporting contact surface of the connecting block 12 is larger, which is the preferred solution, making the supporting strength better and more stable.

[0034] Preferably, a pressure cover 13 fixedly connected by screws is provided at the notch of the C-shaped circular groove of the first connecting seat 8 and the second connecting seat 9, and the pressure cover 13 is used to limit the first cylinder 10 and the second cylinder 11 from moving out of the C-shaped circular groove.

[0035] Preferably, refer to Figure 1 A slot-type photoelectric switch is provided on one side wall corresponding to one of the slots of the C-shaped circular slot of the first connecting seat 8. The slot-type photoelectric switch is used to sense the initial position of the first connecting seat 8, which is the lower limit position state of the lifting plate 3 when it is lowered. The slot-type photoelectric switch includes a slot-type photoelectric sensor 14 and a baffle 15 at the slot of the slot-type photoelectric switch that moves in and out. The baffle 15 is fixed to the side wall of the first connecting seat 8, and the slot-type photoelectric sensor 14 is fixed to the mounting table 1. The initial height of the lifting plate 3 can be adjusted by adjusting the position of the slot-type photoelectric sensor 14 as needed.

[0036] Preferably, a stop column 19 is provided on the mounting table 1, and the stop column 19 is provided at the rear side of the first connecting seat 8 when the first connecting seat 8 moves to the initial position. The stop column 19 is used to limit the first connecting seat 8 when the first connecting seat 8 moves to the initial position through the ball screw nut 7 when the slot-type photoelectric switch is further provided.

[0037] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A toggle jacking structure, characterized in that: include: A mounting table, wherein the mounting table is vertically provided with guide bearings, the guide bearings include at least four guide bearings, and the guide bearings are evenly and vertically arranged at the edge of the mounting table; A lifting plate, wherein the upper end of the guide bearing is vertically connected to the bottom surface of the lifting plate; Bearing seats, including at least two bearing seats, which are respectively arranged in the middle of the left and right sides of the installation table and arranged in a straight line; A lead screw, the lead screw is assembled on the bearing seat, and two ball screw nuts are provided on the lead screw; A first connecting seat, wherein the first connecting seat comprises two, each of which is fixed on a ball screw nut; A second connecting seat, the second connecting seat includes two seats, which are respectively fixed on both sides of the bottom surface of the jacking plate; A toggle connector, wherein the toggle connector includes two groups, and the upper and lower ends are movably connected to the first connecting seat and the second connecting seat on the same side respectively; A driving motor drives the lead screw to rotate forward and reversely, drives the ball screw nut and the first connecting seat on the lead screw to move toward or away from each other, and drives the toggle connecting piece to move to achieve the raising or lowering of the lifting plate.

2. The toggle jacking structure according to claim 1, characterized in that: The drive motor adopts a servo motor or a stepper motor, which is fixed in the middle of the mounting table. The output shaft of the drive motor is perpendicular to the lead screw. A first bevel gear is arranged at the front end of the output shaft of the drive motor, and a second bevel gear meshing with the first bevel gear is arranged on the lead screw.

3. The toggle jacking structure according to claim 2, characterized in that: The lead screw adopts a bidirectional lead screw, which adopts the same lead screw, half of the lead screw body is provided with a left-handed thread, and the other half of the lead screw body is provided with a right-handed thread, or the bidirectional lead screw is composed of a left-handed lead screw and a right-handed lead screw, and the second bevel gear is arranged near the middle of the bidirectional lead screw.

4. The toggle jacking structure according to claim 2, characterized in that: The lead screws are two identical single-rotation lead screws arranged with the same central axis. One second bevel gear is respectively arranged at the opposite ends of the two single-rotation lead screws, and the first bevel gear synchronously drives the two second bevel gears.

5. The toggle jacking structure according to claim 2, characterized in that: A dustproof box is provided at the front end of the driving motor, a first through hole is provided on the front side of the dustproof box for passing through the output shaft of the driving motor, a second through hole and a third through hole are provided on the left and right sides of the dustproof box for crossing the lead screw, and ball bearings are embedded in the first through hole, the second through hole and the third through hole.

6. The toggle jacking structure according to claim 1, characterized in that: The toggle joint connecting piece includes a first cylinder, a second cylinder, and a connecting block. The upper and lower sides of the connecting block are respectively connected to the side walls of the first cylinder and the second cylinder. A C-shaped circular groove is horizontally provided on the first connecting seat and the second connecting seat. The first cylinder and the second cylinder are respectively inserted into the notches of the C-shaped circular groove of the first connecting seat and the C-shaped circular groove of the second connecting seat. The first cylinder and the second cylinder rotate circumferentially in the C-shaped circular groove as the first connecting seat moves left and right on the bidirectional screw.

7. The toggle jacking structure according to claim 6, characterized in that: The notches of the C-shaped circular grooves of the first connecting seat and the second connecting seat are provided with pressure covers fixedly connected by screws, and the pressure covers are used to limit the first cylinder and the second cylinder from moving out of the C-shaped circular grooves.

8. The toggle jacking structure according to claim 7, characterized in that: A slot-type photoelectric switch is provided on one side wall corresponding to one of the slots of the C-shaped circular groove of the first connecting seat, and the slot-type photoelectric switch is used to sense the initial position of the first connecting seat, which is the lower limit position state of the lifting plate when it is descended.

9. The toggle jacking structure according to claim 8, characterized in that: A stop column is arranged on the installation table, and the stop column is arranged on the rear side when the first connecting seat runs to the initial position.

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