Lead screw type elevator device

Abstract

The utility model provides a lead screw type lifter device which comprises a lifting mechanism used for driving a workpiece to ascend and descend and a transmission mechanism used for driving the lifting mechanism to drive the workpiece to ascend and descend, and the lifting mechanism comprises a bottom supporting frame, a first jacking plate, a second jacking plate, a third jacking plate, a fourth jacking plate and a top supporting frame used for placing the workpiece. The bottom of the first jacking plate and the bottom of the second jacking plate are connected with one side of the bottom supporting frame, the middle of the first jacking plate and the middle of the second jacking plate are connected through a fourth fixing pin, and the top of the first jacking plate and the top of the second jacking plate are connected with one side of the top supporting frame. The bottom of the third jacking plate and the bottom of the fourth jacking plate are connected with the other side of the bottom supporting frame, the middle of the third jacking plate and the middle of the fourth jacking plate are connected through a fifth fixing pin, and the top of the third jacking plate and the top of the fourth jacking plate are connected with the other side of the top supporting frame. According to the utility model, the problem of how to improve the stability of the workpiece in the lifting and conveying process in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of vertical lifting machinery, and in particular to a screw-type lifting device. Background Technology

[0002] With the continuous development and progress of industry, the manufacturing industry is also developing rapidly. The requirements for the stability of workpieces during lifting and conveying are becoming increasingly stringent. Currently, steel wire ropes are widely used for lifting workpieces. However, steel wire ropes are flexible transmissions, which leads to instability in the lifting process. Traditional flexible steel wire rope transmissions result in unstable lifting speeds and poor stability.

[0003] Therefore, how to improve the stability of the workpiece during the lifting and conveying process has become a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide a screw-type lifting device, which mainly solves the problem of how to improve the stability of workpieces during the lifting and conveying process in the existing technology.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a screw-type jacking device, characterized in that: the screw-type jacking device includes a lifting mechanism for lifting and lowering a workpiece and a transmission mechanism for driving the lifting mechanism to lift and lower the workpiece; the lifting mechanism includes a bottom support frame, a first lifting plate, a second lifting plate, a third lifting plate, a fourth lifting plate, and a top support frame for placing the workpiece; the bottom of the first lifting plate and the bottom of the second lifting plate are connected to one side of the bottom support frame; the middle part of the first lifting plate and the middle part of the second lifting plate are connected by a fourth fixing pin; the top of the first lifting plate and the top of the second lifting plate are connected to one side of the top support frame; the bottom of the third lifting plate and the bottom of the fourth lifting plate are connected to the other side of the bottom support frame; the middle part of the third lifting plate and the middle part of the fourth lifting plate are connected by a fifth fixing pin; the top of the third lifting plate and the top of the fourth lifting plate are connected to the other side of the top support frame.

[0006] The transmission mechanism includes a motor, a first fixing mechanism, and a second fixing mechanism. The motor is connected to a lead screw, the second fixing mechanism is movably connected to the lead screw, and the first fixing mechanism is fixed to the end of the lead screw. The motor and the lead screw control the lifting mechanism to lift the workpiece by controlling the distance between the first fixing mechanism and the second fixing mechanism.

[0007] Furthermore, the first fixing mechanism includes a first fixing bracket, two sets of first inner bearings and a first outer bearing, and the first fixing bracket is connected to the end of the lead screw through a first connecting block; the second fixing mechanism includes a second fixing bracket, two sets of second inner bearings and a second outer bearing, and the second fixing bracket is movably connected to the lead screw;

[0008] The two sets of first inner bearings correspond to the lower rear side of the second lifting plate and the lower rear side of the fourth lifting plate, respectively; the two sets of first outer bearings correspond to the upper rear side of the first lifting plate and the upper rear side of the third lifting plate, respectively; the two sets of second inner bearings correspond to the upper front side of the second lifting plate and the upper front side of the fourth lifting plate, respectively; the two sets of second outer bearings correspond to the lower front side of the first lifting plate and the lower front side of the third lifting plate, respectively.

[0009] Furthermore, wear bands are provided on the lower front side of the first lifting plate, the upper rear side of the first lifting plate, the upper front side of the second lifting plate, the lower rear side of the second lifting plate, the lower front side of the third lifting plate, the upper rear side of the third lifting plate, the upper front side of the fourth lifting plate, and the lower rear side of the fourth lifting plate.

[0010] Reinforcing plates are installed on both sides of the first lifting plate, both sides of the second lifting plate, both sides of the third lifting plate, and both sides of the fourth lifting plate.

[0011] Furthermore, the first lifting plate and the third lifting plate are connected by a first connecting frame and a fourth connecting frame; the second lifting plate and the fourth lifting plate are connected by a second connecting frame and a third connecting frame.

[0012] Furthermore, the bottom support frame and the second lifting plate are connected and fixed together by the first fixed support, and the bottom support frame and the fourth lifting plate are connected and fixed together by the second fixed support.

[0013] The top support frame and the first lifting plate are connected and fixed by a fourth fixed support, and the top support frame and the third lifting plate are connected and fixed by a third fixed support.

[0014] The bottom support frame and the first lifting plate are connected and fixed by a sixth fixing pin, and the bottom support frame and the third lifting plate are connected and fixed by a first fixing pin;

[0015] The top support frame and the second lifting plate are connected and fixed by a third fixing pin, and the top support frame and the fourth lifting plate are connected and fixed by a second fixing pin;

[0016] The top support frame is equipped with a support block for supporting the workpiece.

[0017] Furthermore, the second fixed bracket is connected to the bracket, the bracket is connected to the round rod, and two round blocks are set on the round rod. The two round blocks are located on both sides of the second fixed bracket. The bracket is also connected to the first limit switch and the second limit switch, each corresponding to one round block.

[0018] The round rod is connected to the first connecting block, and the round rod is parallel to the lead screw.

[0019] Furthermore, the first fixed bracket is connected to the oil nozzle, the first connecting block is connected to the elastic airbag, the elastic airbag is filled with lubricating oil, the elastic airbag is connected to the oil nozzle, and the oil nozzle corresponds to the end of the lead screw; a cam is set between the motor and the elastic airbag, and the motor drives the cam to compress the elastic airbag.

[0020] A lead screw protective sleeve is installed on the lead screw.

[0021] Furthermore, the screw jack device also includes a protection mechanism, which includes four third fixed supports, two third fixed supports as a group, and the two third fixed supports in each group are connected by a fifth connecting frame. The top of each third fixed support is connected to a rocker arm through a third bearing. The fifth connecting frame is connected to a fifth fixed support, the fifth fixed support is connected to a cylinder, and the movable end of the cylinder is connected to the rocker arm.

[0022] The fifth connecting frame between the fifth fixed support and the rocker arm connects to a limiting block used to limit the rocker arm.

[0023] Furthermore, the top support frame is connected to a limiting bracket;

[0024] Each of the two sets of fifth connecting frames is connected to a fixed rod, and sensors are connected to both fixed rods. One of the fixed rods is also connected to several sets of third limit switches at different heights, and the limit bracket moves between the corresponding third limit switches.

[0025] Furthermore, the bottom support frame connects to several foot pedals;

[0026] A first clamping piece is provided between each of the two sets of first inner bearings and first outer bearings, and the two first clamping pieces correspond to the lower rear side of the second lifting plate and the lower rear side of the fourth lifting plate, respectively.

[0027] A second clamping piece is provided between each of the two sets of second inner bearings and second outer bearings. The two second clamping pieces correspond to the front upper side of the second lifting plate and the front upper side of the fourth lifting plate, respectively.

[0028] In view of the above technical features, the present invention has the following beneficial effects:

[0029] 1. This utility model discloses a screw-type lifting device, which uses a motor to drive the screw to move, so that the first lifting plate, the second lifting plate, the third lifting plate, and the fourth lifting plate work together to move in an X-shaped frame structure. The device is equipped with a first limit switch and a second limit switch to control the lifting stroke of the top support plate. The screw-type lifting device is equipped with a protective mechanism around the device to protect the workpiece on the device. The screw-type lifting device uses the translational movement of the second fixed mechanism on the screw to drive the lifting mechanism (i.e., the X-shaped frame) to rise and fall, thereby driving the top support plate to rise and fall. The lifting speed of the top support plate is stable and the stability is better. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a screw-type lifting device in specific embodiment 1;

[0031] Figure 2 This is a schematic diagram of the lifting mechanism in specific embodiment 1;

[0032] Figure 3 This is a schematic diagram of the transmission mechanism in specific embodiment 1. Figure 1 ;

[0033] Figure 4 This is a schematic diagram of the lifting mechanism and transmission mechanism in specific embodiment 1. Figure 1 ;

[0034] Figure 5 This is a schematic diagram of the lifting mechanism and transmission mechanism in specific embodiment 1. Figure 2 ;

[0035] Figure 6 This is a schematic diagram of the transmission mechanism in specific embodiment 1. Figure 2 ;

[0036] Figure 7 This is a schematic diagram of the transmission mechanism in specific embodiment 1. Figure 3 ;

[0037] Figure 8 This is a schematic diagram of the transmission mechanism in specific embodiment 1. Figure 4 ;

[0038] Figure 9 This is a schematic diagram of the protection mechanism in specific embodiment 1. Figure 1 ;

[0039] Figure 10 This is a schematic diagram of the protection mechanism in specific embodiment 1. Figure 2 (Display limit bracket);

[0040] Figure 11 This is a schematic diagram of the fixed rod in specific embodiment 1 (showing two sets of third limit switches).

[0041] In the diagram: 1. Bottom support frame; 2. Top support frame; 3. First lifting plate; 3-1. Lower front side of the first lifting plate; 3-2. Upper rear side of the first lifting plate; 4. Second lifting plate; 4-1. Upper front side of the second lifting plate; 4-2. Lower rear side of the second lifting plate; 5. Reinforcing plate; 6. Wear zone; 7. Third lifting plate; 7-1. Lower front side of the third lifting plate; 7-2. Upper rear side of the third lifting plate; 8. Fourth lifting plate Lifting plate; 8-1, Front upper side of the fourth lifting plate; 8-2, Rear lower side of the fourth lifting plate; 9, First connecting frame; 10, Second connecting frame; 11, Third connecting frame; 12, Fourth connecting frame; 13, First fixed support; 14, Second fixed support; 15, First fixing pin; 16, Second fixing pin; 17, Third fixing pin; 18, Third fixed support; 19, Fourth fixed support; 20, Support block; 21, Foot pedal 22. Motor; 23. First fixed bracket; 24. First connecting block; 25-1. First inner bearing; 25-2. First outer bearing; 25-3. First clamping piece; 26. Second fixed bracket; 27. Lead screw protective sleeve; 28. Round rod; 29. ​​First limit switch; 30. Second limit switch; 31. Lead screw; 32. Round block; 33. Bracket; 34. Third fixed bracket; 35. Cylinder; 36. Rocker arm; 37. Fifth fixed support; 38. Limiting block; 39-1. Second inner bearing; 39-2. Second outer bearing; 39-3. Second clamping piece; 40. Fifth connecting frame; 41. Fixed rod; 42. Sensor; 43. Third limit switch; 44. Oil nozzle; 45. Fourth fixing pin; 46. Fifth fixing pin; 47. Sixth fixing pin; 48. Third bearing; 49. Elastic airbag; 50. Cam; 51. Limiting bracket. Detailed Implementation

[0042] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0043] See Figures 1 to 11Specific embodiment 1: This embodiment 1 provides a screw-type lifting machine device, including a lifting mechanism for lifting and lowering a workpiece and a transmission mechanism for driving the lifting mechanism to lift and lower the workpiece. The lifting mechanism includes a bottom support frame 1, a first lifting plate 3, a second lifting plate 4, a third lifting plate 7, a fourth lifting plate 8, and a top support frame 2 for placing the workpiece. The bottom of the first lifting plate 3 and the bottom of the second lifting plate 4 are connected to one side of the bottom support frame 1. The middle part of the first lifting plate 3 and the middle part of the second lifting plate 4 are connected by a fourth fixing pin 45. The top of the first lifting plate 3 and the top of the second lifting plate 4 are connected to one side of the top support frame 2. The bottom of the third lifting plate 7 and the bottom of the fourth lifting plate 8 are connected to the other side of the bottom support frame 1. The middle part of the third lifting plate 7 and the middle part of the fourth lifting plate 8 are connected by a fifth fixing pin 46. The top of the third lifting plate 7 and the top of the fourth lifting plate 8 are connected to the other side of the top support frame 2.

[0044] The transmission mechanism includes a motor 22, a first fixing mechanism, and a second fixing mechanism. The motor 22 is connected to a lead screw 31. The second fixing mechanism is movably connected to the lead screw. The first fixing mechanism is fixed to the end of the lead screw. The motor and the lead screw control the lifting mechanism to lift the workpiece by controlling the distance between the first fixing mechanism and the second fixing mechanism.

[0045] Specifically, the first fixing mechanism includes a first fixing bracket 23, two sets of first inner bearings 25-1 and first outer bearings 25-2. The first fixing bracket 23 is connected to the end of the lead screw 31 through a first connecting block 24. The second fixing mechanism includes a second fixing bracket 26, two sets of second inner bearings 39-1 and second outer bearings 39-2. The second fixing bracket 26 is movably connected to the lead screw 31. For example, the second fixing bracket 26 is connected to the lead screw 31 through rollers or nuts with ball return devices, so as to realize the second connection on the lead screw 31 is movable.

[0046] A lead screw protective sleeve 27 is provided on the lead screw 31 to prevent dust from covering the lead screw 31 and affecting the life of the device.

[0047] The two sets of first inner bearings 25-1 correspond to the rear lower side 4-2 of the second lifting plate and the rear lower side 8-2 of the fourth lifting plate, respectively. The two sets of first outer bearings 25-2 correspond to the rear upper side 3-2 of the first lifting plate and the rear upper side 7-2 of the third lifting plate, respectively. The two sets of second inner bearings 39-1 correspond to the front upper side 4-1 of the second lifting plate and the front upper side 8-1 of the fourth lifting plate, respectively. The two sets of second outer bearings 39-2 correspond to the front lower side 3-1 of the first lifting plate and the front lower side 7-1 of the third lifting plate, respectively.

[0048] Wear bands 6 are provided on the following surfaces: the lower front side 3-1 of the first lifting plate, the upper rear side 3-2 of the first lifting plate, the upper front side 4-1 of the second lifting plate, the lower rear side 4-2 of the second lifting plate, the lower front side 7-1 of the third lifting plate, the upper rear side 7-2 of the third lifting plate, the upper front side 8-1 of the fourth lifting plate, and the lower rear side 8-2 of the fourth lifting plate. For example, eight wear bands 6 are provided, installed on the lower rear side 4-2 of the second lifting plate, the lower rear side 8-2 of the fourth lifting plate, the upper rear side 3-2 of the first lifting plate, the upper rear side 7-2 of the third lifting plate, and the upper front side 4-1 of the second lifting plate. Wear bands 6 on the upper front side 8-1 of the first and fourth lifting plates, the lower front side 3-1 of the first lifting plate, and the lower front side 7-1 of the third lifting plate help increase the friction between the corresponding inner or outer bearing and the corresponding lifting plate. Driven by the motor 22, the lead screw 31 operates. Wear bands 6 can better help the corresponding inner and outer bearings squeeze the corresponding lifting plates. The device is raised and lowered in an X-shape by using the first lifting plate 3, the second lifting plate 4, the third lifting plate 7, and the fourth lifting plate 8. The lifting speed is more stable and safer, replacing the traditional steel wire rope flexible transmission.

[0049] Reinforcing plates 5 are provided on both sides of the first lifting plate 3, both sides of the second lifting plate 4, both sides of the third lifting plate 7, and both sides of the fourth lifting plate 8. For example, there are 8 reinforcing plates 5 to increase the hardness of the corresponding lifting plates and improve their load-bearing capacity and service life.

[0050] The first lifting plate 3 and the third lifting plate 7 are connected by a first connecting frame 9 and a fourth connecting frame, which strengthens the connection between the first lifting plate 3 and the third lifting plate 7; the second lifting plate 4 and the fourth lifting plate 8 are connected by a second connecting frame 10 and a third connecting frame 11, which strengthens the connection between the second lifting plate 4 and the fourth lifting plate 8.

[0051] The bottom support frame 1 and the second lifting plate 4 are connected and fixed together by the first fixed support 13, and the bottom support frame 1 and the fourth lifting plate 8 are connected and fixed together by the second fixed support 14.

[0052] The top support frame 2 and the first lifting plate 3 are connected and fixed by the fourth fixed support 19, and the top support frame 2 and the third lifting plate 7 are connected and fixed by the third fixed support 18.

[0053] The bottom support frame 1 and the first lifting plate 3 are connected and fixed by the sixth fixing pin 47, and the bottom support frame 1 and the third lifting plate 7 are connected and fixed by the first fixing pin 15.

[0054] The top support frame 2 and the second lifting plate 4 are connected and fixed by a third fixing pin 17, and the top support frame 2 and the fourth lifting plate 8 are connected and fixed by a second fixing pin 16.

[0055] A first clamping piece 25-3 is provided between each of the two sets of first inner bearings 25-1 and first outer bearings 25-2. The two first clamping pieces 25-3 correspond to the lower rear side 4-2 of the second lifting plate and the lower rear side 8-2 of the fourth lifting plate, respectively. The two first clamping pieces 25-3 are used to clamp the second lifting plate 4 and the fourth lifting plate 8, help fix the position of the first fixing mechanism, prevent the first fixing mechanism from moving left and right, and ensure that the corresponding first inner bearing 25-1 and first outer bearing 25-2 correspond to the side of the corresponding lifting plate.

[0056] A second clamping piece 39-3 is provided between each of the two sets of second inner bearings 39-1 and second outer bearings 39-2. The two second clamping pieces 39-3 correspond to the front upper side 4-1 of the second lifting plate and the front upper side 8-1 of the fourth lifting plate, respectively. The two second clamping pieces 39-3 are used to clamp the second lifting plate 4 and the fourth lifting plate 8, help fix the position of the second fixing mechanism, prevent the second fixing mechanism from moving left and right, and ensure that the corresponding second inner bearing 39-1 and the second outer bearing 39-2 correspond to the side of the corresponding lifting plate.

[0057] The top support frame 2 is equipped with a support block 20 for supporting the workpiece. The support block 20 can better support the workpiece and prevent the workpiece from moving laterally.

[0058] The second fixed bracket 26 is connected to the bracket 33, for example, the second fixed bracket 26 is sleeved on the bracket 33, which is connected to the round rod 28. Two round blocks 32 are set on the round rod 28, located on opposite sides of the second fixed bracket 26. A first limit switch 29 and a second limit switch 30 are also connected to the bracket, each corresponding to one round block 32. The round rod 28 is connected to the first connecting block 24 and is parallel to the lead screw 31. That is, the two round blocks 32 are on the round rod 28. During the movement of the lead screw 31, the first limit switch 29 and the second limit switch 30 touch the corresponding round block 32 to detect the movement distance of the lead screw 31. The movement distance of the second fixed bracket 26 is controlled by the lead screw 31, indirectly controlling the lifting height of the device. The device can more accurately lift the workpiece to different heights, while also ensuring that the movement distance of the second fixed bracket 26 does not exceed the stroke range of the lead screw 31, thus improving the safety of the device.

[0059] The first fixed bracket 23 is connected to the oil nozzle 44, and the first connecting block 24 is connected to the elastic airbag 49. The elastic airbag 49 is filled with lubricating oil and is connected to the oil nozzle 44, which corresponds to the end of the lead screw 31. A cam 50 is provided between the motor 22 and the elastic airbag 49. The motor 22 drives the cam 50 to squeeze the elastic airbag 49. When the drive motor 22 drives the lead screw 31 to rotate, the motor 22 drives the cam 50 to squeeze the elastic airbag 49, spraying a small amount of lubricating oil to the end of the lead screw 31 (for example, the end of the lead screw 31 that is leaking out at the front end of the lead screw protective sleeve 27) to prevent oil splashing. A small amount of lubricating oil slowly seeps into the lead screw inside the lead screw protective sleeve 27 to prevent the lead screw 31 from overheating and deforming.

[0060] The screw-type lifting device also includes a safety mechanism, which includes four third fixed supports 34 (e.g., at the four corners of the top support frame 2). The third fixed supports 34 are fixed to the ground, and two third fixed supports 34 form a group. The two third fixed supports 34 in each group are connected by a fifth connecting frame 40. The top of each third fixed support 34 is connected to a rocker arm 36 through a third bearing 48. The fifth connecting frame 40 is connected to a fifth fixed support 37, and the fifth fixed support 37 is connected to a cylinder 35. The movable end of the cylinder 35 is connected to the rocker arm 36. The four rocker arms 36 are opened by controlling the four cylinders 35 (i.e., the movable end of the corresponding cylinder 35 retracts, the rocker arm 36 rotates outward and moves to the area above the top support frame 2), and the workpiece is transported into the lifting device. Then, the four rocker arms 36 are closed to prevent the workpiece from falling during the operation of the device, thus protecting the workpiece during lifting and lowering more safely.

[0061] The fifth connecting frame 40 between the fifth fixed support 37 and the rocker arm 36 is connected to a limiting block 38 for limiting the rocker arm 36. When the movable end of the corresponding cylinder 35 extends, the movable end of the cylinder 35 rotates the rocker arm 36 and touches the limiting block 38 to stop. At this time, the rocker arm 36 is in the closed state (that is, the rocker arm 36 rotates inward and moves to the area above the top support frame 2).

[0062] The top support frame 2 is connected to a limiting bracket 51; each of the two sets of fifth connecting frames 40 is connected to a fixed rod 41, and a sensor 42 is connected to each of the two fixed rods 41. One of the fixed rods 41 is also connected to several sets of third limit switches 43 at different heights. The limiting bracket 51 moves between the corresponding third limit switches 43. For example, as the top support frame 2 moves up and down, the limiting bracket 51 moves up and down, touching several sets of third limit switches 43 at different heights. This is used to limit the maximum upward stroke and the maximum downward stroke of the top support frame 2. For example, when the top support frame 2 carries the workpiece to the highest point, the limiting bracket 51 abuts against the uppermost set of third limit switches 43. The uppermost set of third limit switches 43 senses the position of the top support frame 2 and can control the motor 22 to stop running through the controller (such as PLC) to prevent the lifting support frame 2 from exceeding the upward stroke and to prevent collision with the rocker arm 36 of the protection mechanism. Conversely, when the top support frame 2 descends to its lowest position with the workpiece, the limiting bracket 51 abuts against the lowest set of third limit switches 43. The lowest set of third limit switches 43 senses the position of the top support frame 2 and can control the motor 22 to stop running via a controller (such as a PLC) to prevent the lifting support frame 2 from exceeding its descent stroke. In this embodiment 1, three third limit switches 43 are provided. In addition to the highest and lowest sets of third limit switches 43, the middle third limit switch 43 can also help sense the up-and-down movement of the top support frame 2 with the limiting bracket 51. When the sensor 42 senses that the workpiece has entered the area of ​​the top support frame 2, it ensures that the workpiece is placed on the top support frame 2 (for example, the workpiece is placed on the support block 20). The top support frame 2 moves up and down, and the limiting bracket 51 touches the corresponding third limit switch 43. The limiting bracket 51 ensures that the top support frame 2 will not exceed its maximum upward and downward stroke, ensuring safer operation of the device.

[0063] The bottom support frame 1 is connected to several foot pedals 21, and the bottom support frame 1 is fixed to the ground by the multiple foot pedals 21.

[0064] In this embodiment 1, the working principle and usage process of a screw jack device are as follows: The bottom support frame 1 is fixed to the ground by the foot pedal 21, and four protective mechanisms are fixed at the four corners of the device. When the conveyed workpiece arrives at the screw jack device (for example, the workpiece enters the area between the two fixed rods 41), the sensor 42 senses the workpiece, and the cylinder 35 controls the rocker arm 36 to open, allowing the workpiece to enter the screw jack device (i.e., the workpiece is placed on the support block 20 on the top support frame 2). The motor 22 drives the screw 31 to move the X-shaped structural frame of the device. The bearings on the first and second fixed mechanisms operate on the wear band 6, and the oil nozzle 44 precisely sprays oil for lubrication. The first limit switch 29 and the second limit switch 30 respectively collide with the circular block 32 to ensure that the screw 31 operates within its maximum range. A third limit switch 43 is also set during the up and down operation of the screw jack device. The third limit switch 43 collidees with the support frame to ensure that the device operates within its maximum lifting range. After the workpiece lifting is completed, the cylinder 35 opens the rocker arm 36, and the gripper picks up the workpiece and moves it to the next workstation.

[0065] This utility model discloses a screw-type lifting device. A motor 22 drives a screw to move, causing the first lifting plate 3, the second lifting plate 4, the third lifting plate 7, and the fourth lifting plate 8 to work together in an X-shaped frame structure. A first limit switch 29 and a second limit switch 30 control the lifting stroke of the top support plate 2. Protective mechanisms are installed around the screw-type lifting device to protect the workpiece on the device. The screw-type lifting device utilizes the translational movement of the second fixing mechanism on the screw 31 to drive the lifting mechanism (i.e., the X-shaped frame) to rise and fall, thereby driving the top support plate 2 to rise and fall. The lifting speed of the top support plate 2 and the workpiece on it is stable, with better smoothness. The structure of this device is also simpler.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0068] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A screw-type jacking device, characterized in that: The screw jack device includes a lifting mechanism for lifting and lowering a workpiece and a transmission mechanism for driving the lifting mechanism to lift and lower the workpiece. The lifting mechanism includes a bottom support frame (1), a first lifting plate (3), a second lifting plate (4), a third lifting plate (7), a fourth lifting plate (8), and a top support frame (2) for placing the workpiece. The bottom of the first lifting plate (3) and the bottom of the second lifting plate (4) are connected to one side of the bottom support frame (1). The middle part of the first lifting plate (3) and the middle part of the second lifting plate (4) are connected by a fourth fixing pin (45). The top of the first lifting plate (3) and the top of the second lifting plate (4) are connected to one side of the top support frame (2). The bottom of the third lifting plate (7) and the bottom of the fourth lifting plate (8) are connected to the other side of the bottom support frame (1). The middle part of the third lifting plate (7) and the middle part of the fourth lifting plate (8) are connected by a fifth fixing pin (46). The top of the third lifting plate (7) and the top of the fourth lifting plate (8) are connected to the other side of the top support frame (2). The transmission mechanism includes a motor (22), a first fixing mechanism and a second fixing mechanism. The motor (22) is connected to a lead screw (31). The second fixing mechanism is movably connected to the lead screw. The first fixing mechanism is fixed to the end of the lead screw. The motor (22) and the lead screw (31) control the lifting mechanism to lift the workpiece by controlling the distance between the first fixing mechanism and the second fixing mechanism.

2. The screw-type jacking device according to claim 1, characterized in that: The first fixing mechanism includes a first fixing bracket (23), two sets of first inner bearings (25-1) and a first outer bearing (25-2). The first fixing bracket (23) is connected to the end of the lead screw (31) through a first connecting block (24). The second fixing mechanism includes a second fixing bracket (26), two sets of second inner bearings (39-1) and a second outer bearing (39-2). The second fixing bracket (26) is movably connected to the lead screw (31). The two sets of first inner bearings (25-1) correspond to the lower rear side (4-2) of the second lifting plate and the lower rear side (8-2) of the fourth lifting plate, respectively. The two sets of first outer bearings (25-2) correspond to the upper rear side (3-2) of the first lifting plate and the upper rear side (7-2) of the third lifting plate, respectively. The two sets of second inner bearings (39-1) correspond to the upper front side (4-1) of the second lifting plate and the upper front side (8-1) of the fourth lifting plate, respectively. The two sets of second outer bearings (39-2) correspond to the lower front side (3-1) of the first lifting plate and the lower front side (7-1) of the third lifting plate, respectively.

3. The screw-type jacking device according to claim 2, characterized in that: Wear bands (6) are provided on the lower front side (3-1) of the first lifting plate, the upper rear side (3-2) of the first lifting plate, the upper front side (4-1) of the second lifting plate, the lower rear side (4-2) of the second lifting plate, the lower front side (7-1) of the third lifting plate, the upper rear side (7-2) of the third lifting plate, the upper front side (8-1) of the fourth lifting plate, and the lower rear side (8-2) of the fourth lifting plate. Reinforcing plates (5) are provided on both sides of the first lifting plate (3), both sides of the second lifting plate (4), both sides of the third lifting plate (7), and both sides of the fourth lifting plate (8).

4. The screw-type jacking device according to claim 3, characterized in that: The first lifting plate (3) and the third lifting plate (7) are connected by a first connecting frame (9) and a fourth connecting frame (12); the second lifting plate (4) and the fourth lifting plate (8) are connected by a second connecting frame (10) and a third connecting frame (11).

5. The screw jack device according to claim 4, characterized in that: The bottom support frame (1) and the second lifting plate (4) are connected and fixed by the first fixed support (13), and the bottom support frame (1) and the fourth lifting plate (8) are connected and fixed by the second fixed support (14). The top support frame (2) and the first lifting plate (3) are connected and fixed by the fourth fixed support (19), and the top support frame (2) and the third lifting plate (7) are connected and fixed by the third fixed support (18). The bottom support frame (1) and the first lifting plate (3) are connected and fixed by the sixth fixing pin (47), and the bottom support frame (1) and the third lifting plate (7) are connected and fixed by the first fixing pin (15); The top support frame (2) and the second lifting plate (4) are connected and fixed by a third fixing pin (17), and the top support frame (2) and the fourth lifting plate (8) are connected and fixed by a second fixing pin (16); The top support frame (2) is provided with a support block (20) for supporting the workpiece.

6. The screw jack device according to claim 5, characterized in that: The second fixed bracket (26) is connected to the bracket (33), the bracket (33) is connected to the round rod (28), and two round blocks (32) are set on the round rod (28). The two round blocks (32) are located on both sides of the second fixed bracket (26). The bracket (33) is also connected to the first limit switch (29) and the second limit switch (30). The first limit switch (29) and the second limit switch (30) correspond to one round block (32) respectively. The round rod (28) is connected to the first connecting block (24), and the round rod (28) is parallel to the lead screw (31).

7. The screw jack device according to claim 6, characterized in that: The first fixed bracket (23) is connected to the oil nozzle (44), the first connecting block (24) is connected to the elastic air bag (49), the elastic air bag (49) is filled with lubricating oil, the elastic air bag (49) is connected to the oil nozzle (44), the oil nozzle (44) corresponds to the end of the lead screw (31); a cam (50) is set between the motor (22) and the elastic air bag (49), the motor (22) squeezes the elastic air bag (49) with the cam (50); A lead screw protective sleeve (27) is provided on the lead screw (31).

8. A screw-type jacking device according to any one of claims 1 to 7, characterized in that: The screw jack device also includes a protection mechanism, which includes four third fixed supports (34). Two third fixed supports (34) form a group, and the two third fixed supports (34) in each group are connected by a fifth connecting frame (40). The top of each third fixed support (34) is connected to a rocker arm (36) through a third bearing (48). The fifth connecting frame (40) is connected to a fifth fixed support (37), and the fifth fixed support (37) is connected to a cylinder (35). The movable end of the cylinder (35) is connected to the rocker arm (36). The fifth connecting bracket (40) between the fifth fixed support (37) and the rocker arm (36) is connected to a limiting block (38) for limiting the rocker arm (36).

9. The screw-type jacking device according to claim 8, characterized in that: The top support frame (2) is connected to the limiting bracket (51); Each of the two sets of fifth connecting frames (40) is connected to a fixed rod (41), and a sensor (42) is connected to each of the two fixed rods (41). One of the fixed rods (41) is also connected to several sets of third limit switches (43) at different heights. The limit bracket (51) moves between the corresponding third limit switches (43).

10. The screw jack device according to claim 9, characterized in that: The bottom support frame (1) connects to several foot pedals (21); A first clamping piece (25-3) is provided between each of the two sets of first inner bearings (25-1) and first outer bearings (25-2). The two first clamping pieces (25-3) correspond to the rear lower side of the second lifting plate (4-2) and the rear lower side of the fourth lifting plate (8-2), respectively. A second clamping piece (39-3) is provided between each of the two sets of second inner bearings (39-1) and the second outer bearing (39-2). The two second clamping pieces (39-3) correspond to the front upper side of the second lifting plate (4-1) and the front upper side of the fourth lifting plate (8-1), respectively.

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