Large spiral jacking scissor fork device

Abstract

The utility model relates to a jacking device, in particular to a large spiral jacking scissor fork device which comprises a lower supporting plate and a top frame vertically arranged above the lower supporting plate. The lower supporting plate and the top frame are connected through a scissor frame, and an upper supporting plate is fixedly arranged on the top frame. The protective guard capable of being adjusted in a lifting mode relative to the upper supporting plate is arranged on the periphery of the upper supporting plate, and the protective guard is connected to the output shaft of the motor for driving the large-spiral jacking mechanism through the driving mechanism and the transmission mechanism connected with the driving mechanism, so that the large-spiral jacking mechanism is driven by the motor to run, and the large-spiral jacking mechanism is driven by the transmission mechanism to run. In the process that the upper supporting plate and the lower supporting plate get close to each other or get away from each other, through linkage, when the upper supporting plate descends, the protective fence descends on the upper supporting plate relative to the upper supporting plate, when the upper supporting plate ascends, the protective fence ascends on the upper supporting plate relative to the upper supporting plate, and therefore when the upper supporting plate descends, the top of the protective fence and the upper supporting plate are kept flat.

Description

Technical Field

[0001] This utility model relates to a lifting device, specifically a large spiral lifting scissor fork device. Background Technology

[0002] A scissor lift is a type of lifting mechanism made of rectangular steel pipes or plates as scissor supports. It is a mechanical device that uses the extension and retraction of hydraulic cylinders or rigid chains and large spiral drive systems to open and close the scissor supports, thereby achieving lifting and lowering movements. The lifting and lowering of a scissor lift relies on the smooth movement of the support drive system, resulting in high safety and a wide range of applications.

[0003] Currently, large spiral lifting scissor fork devices are available in two types: those with and without a top guardrail. With the guardrail, objects placed on the upper pallet must be lifted over the guardrail before being placed on the pallet. Alternatively, the guardrail can be opened via a pre-designed rotatable side to place the object. The guardrail protects the object on the upper pallet from falling as the device moves. However, the first type lengthens the object's transport path, affecting efficient loading and unloading, while the second type increases preparation time before transport, also impacting efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a large spiral lifting scissor fork device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A large spiral lifting scissor fork device includes a lower support plate and a top frame vertically arranged above the lower support plate; the lower support plate and the top frame are connected by a scissor fork frame, an upper support plate is fixedly arranged on the top frame, a large spiral lifting mechanism is also arranged between the lower support plate and the upper support plate, the input shaft of the large spiral lifting mechanism is coaxially fixed with the output shaft of a motor, the motor is arranged on the upper support plate, and a guardrail lifting mechanism is arranged on the upper support plate;

[0007] The guardrail lifting mechanism includes a guardrail that is slidably disposed around the upper support plate, a drive mechanism disposed at the four corners of the bottom of the upper support plate, and a transmission mechanism that connects the motor and the drive mechanism.

[0008] The motor is used to drive the large spiral lifting mechanism to move the upper support plate closer to or further away from the lower support plate under the action of the scissor lift; the transmission mechanism is used to transmit the power of the motor to the drive mechanism during the process of the upper support plate moving closer to or further away from the lower support plate, and the drive mechanism is used to drive the guardrail to rise and fall relative to the upper support plate.

[0009] As described above, the large spiral lifting scissor fork device has L-shaped frames fixedly installed at the four bottom corners of the guardrail, and the four L-shaped frames are respectively connected to the four drive mechanisms.

[0010] The large spiral lifting scissor fork device as described above: the driving mechanism includes a fixed rod and a screw rod with one end rotatably connected to the fixed rod;

[0011] One end of the fixing rod is fixedly connected to the bottom of the upper support plate, and the other end of the screw is rotatably connected to the bottom of the upper support plate. A first helical gear is fixedly connected to one end of the screw that is rotatably connected to the fixing rod, and the first helical gear is connected to the transmission mechanism.

[0012] The large spiral lifting scissor fork device as described above: the transmission mechanism includes two first transmission rods symmetrically arranged along the length direction of the upper support plate, a second helical gear fixed at both ends of the first transmission rods, and a first single transmission wheel fixed on the first transmission rods;

[0013] The first transmission rod is rotatably connected between two fixed rods provided at one end of the upper support plate, and the second helical gear is meshed with the first helical gear.

[0014] The large spiral lifting scissor fork device described above: the transmission mechanism further includes a second connecting frame rotatably connected to one end of the first transmission rod, a first connecting frame rotatably connected to the other end of the second connecting frame via a rotating shaft, a second double transmission wheel rotatably connected to the rotating shaft, and a linkage mechanism connected to the first connecting frame;

[0015] A rotating head is fixedly installed at the end of the first connecting frame away from the rotating shaft. The transmission position of the second double transmission wheel away from the second connecting frame is connected to the first single transmission wheel via a belt. The other transmission position on the second double transmission wheel is connected to the linkage mechanism via another belt.

[0016] The large spiral lifting scissor fork device as described above: the linkage mechanism includes a first double transmission wheel fixed on the second transmission rod, a fourth helical gear fixed to one end of the second transmission rod, a second single transmission wheel connected to the first double transmission wheel via another belt and fixedly connected to the third transmission rod, and a third single transmission wheel symmetrically fixedly arranged on the third transmission rod with respect to the second single transmission wheel;

[0017] The second and third transmission rods are rotatably mounted on two fixed blocks, which are fixedly connected to the lower support plate. The fixed blocks are rotatably connected to the rotating head. The fourth helical gear meshes with the third helical gear, which is fixedly connected to the output shaft of the motor.

[0018] As described above, in the large spiral lifting scissor fork device: the other drive position of the first double drive wheel is connected to the other drive position of one of the second double drive wheels via another belt, and the third single drive wheel is connected to the other drive position of another second double drive wheel via another belt.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] By installing a height-adjustable guardrail around the upper support plate, and connecting the guardrail to the output shaft of the motor driving the large spiral lifting mechanism via a drive mechanism and a transmission mechanism connected to the drive mechanism, the guardrail moves relative to the upper support plate when the upper support plate descends and rises relative to the upper support plate when the upper support plate rises. Thus, when the upper support plate descends, the top of the guardrail remains flush with the upper support plate, facilitating the handling or unloading of objects. When the upper support plate rises, the guardrail rises to protect the objects placed on the upper support plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the large spiral lifting scissor fork device.

[0022] Figure 2 This is a side view of the structure of the large spiral lifting scissor fork device.

[0023] Figure 3 This is a schematic diagram of the scissor fork frame in a large spiral lifting scissor fork device.

[0024] Figure 4 This is a schematic diagram of the upper support plate in a large spiral lifting scissor fork device.

[0025] Figure 5 This is a schematic diagram of the guardrail lifting mechanism in a large spiral lifting scissor fork device.

[0026] Figure 6 This is a schematic diagram of the linkage mechanism in the large spiral lifting scissor fork device.

[0027] Figure 7This is a schematic diagram of the transmission mechanism in a large spiral lifting scissor fork device.

[0028] Figure 8 This is a schematic diagram of the structure of the guardrail when the large spiral lifting scissor fork device is raised.

[0029] Figure 9 This is a schematic diagram of the structure of the guardrail descending in the large spiral lifting scissor fork device.

[0030] Figure 10 This is a schematic diagram of the upper support plate in a large spiral lifting scissor fork device.

[0031] Figure 11 This is a schematic diagram of the drive mechanism in a large spiral lifting scissor fork device.

[0032] Figure 12 This is a schematic diagram of the protective railing structure in a large spiral lifting scissor fork device.

[0033] Figure 13 This is a schematic diagram of the connection structure between the first connecting frame and the second connecting frame in the large spiral lifting scissor fork device.

[0034] Figure 14 This is a schematic diagram of the rotating shaft and the second double drive wheel in the large spiral lifting scissor fork device.

[0035] In the diagram: 1. Lower support plate; 2. Scissor lift; 3. Upper support plate; 4. Large spiral lifting mechanism; 5. Motor; 6. Guardrail; 7. L-shaped frame; 8. Fixing rod; 9. Screw; 10. First helical gear; 11. Second helical gear; 12. First transmission rod; 13. First single transmission wheel; 14. Third helical gear; 15. Fourth helical gear; 16. Second transmission rod; 17. First double transmission wheel; 18. Second single transmission wheel; 19. Third transmission rod; 20. Third single transmission wheel; 21. First connecting frame; 22. Rotating head; 23. Second connecting frame; 24. Rotating shaft; 25. Second double transmission wheel. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] Please see Figures 1 to 14In this embodiment of the utility model, a large spiral lifting scissor fork device includes a lower support plate 1 and a top frame vertically arranged above the lower support plate 1; the lower support plate 1 and the top frame are connected by a scissor fork frame 2. The device is characterized in that an upper support plate 3 is fixedly arranged on the top frame, and a large spiral lifting mechanism 4 is also arranged between the lower support plate 1 and the upper support plate 3. The input shaft of the large spiral lifting mechanism 4 is coaxially fixed with the output shaft of the motor 5. The motor 5 is arranged on the upper support plate 1, and a guardrail lifting mechanism is arranged on the upper support plate 3.

[0038] The guardrail lifting mechanism includes a guardrail 6 that is slidably installed around the upper support plate 3, a drive mechanism installed at the four corners of the bottom of the upper support plate 3, and a transmission mechanism that connects the motor 5 and the drive mechanism.

[0039] The motor 5 is used to drive the upper support plate 3 to move closer to or away from the lower support plate 1 under the action of the scissor lift 2 by driving the large spiral lifting mechanism 4; the transmission mechanism is used to transmit the power of the motor 5 to the drive mechanism during the process of the upper support plate 3 moving closer to or away from the lower support plate 1, and the drive mechanism is used to drive the guardrail 6 to rise and fall relative to the upper support plate 3.

[0040] In this embodiment, the motor 5 outputs power to drive the large spiral lifting mechanism 4 and the transmission mechanism respectively. After the large spiral lifting mechanism 4 acts on the upper support plate 3, it drives the upper support plate 3 away from or towards the lower support plate 1. Note that since the lower support plate 1 and the top frame are connected by the scissor lift 2, the upper support plate 3 and the lower support plate 1 connected by the large spiral lifting mechanism 4 can only move away from or towards each other, and cannot be offset or rotated.

[0041] At the same time, the transmission mechanism drives multiple guardrails 6 located around the upper support plate 3 to rise and fall synchronously relative to the upper support plate 3 through the drive mechanism.

[0042] In this invention, a large spiral lifting mechanism 4 replaces the traditional, bulky hydraulic cylinder of a hydraulic station in the large spiral lifting scissor fork device. This results in a significantly lower closing height compared to scissors using a hydraulic cylinder, while the stroke of the large spiral is much greater. The large spiral lifting mechanism 4 is a previously disclosed technology. Its principle is as follows: the large spiral drive is similar to a screw-nut pair drive. The raised large spiral resembles a transmission screw, and the bottom mechanism is similar to a nut. The nut section is designed with a sprocket or worm gear input. External torque input allows the nut to rotate, splitting the screw into horizontal and vertical plates. The horizontal plates resemble the threads of the screw, and the vertical plates resemble the inner diameter layers of the screw. The bottom mechanism can be rotated to assemble the horizontal and vertical plates into a screw or to disassemble the screw into plates for storage. The distance between the two horizontal plates is the pitch of the large spiral. One rotation of the sprocket on the large spiral causes it to rise or fall by one pitch. 1. The large spiral mechanism has a compact structure, requiring less stringent foundation pit conditions; shallow pits can achieve large-stroke lifting. 2. The large spiral mechanism is easy to arrange and can be flexibly configured according to the shape of the lifting platform, generally used in lifting platforms with irregular platforms such as orchestra pits. 3. Because the large spiral is composed of thin plates and has a relatively simple internal structure, it is very lightweight and easy to disassemble and maintain. 4. The connection between the large spiral and the base is a tapered sliding bearing; the large spiral is allowed to tilt slightly during installation, generally not exceeding 1 degree. 5. The large spiral has a built-in reduction ratio, which can reduce the need for a reducer in the drive mechanism.

[0043] By adjusting the lifting of the guardrail 6, when the motor 5 drives the large spiral lifting mechanism 4 to descend and the upper pallet 3 descends vertically, the guardrail 6 descends relative to the upper pallet 3 through the transmission and drive mechanisms. When the upper pallet 3 descends to the bottom, the guardrail 6 descends on the drive mechanism, so that the top of the guardrail 6 is level with the top of the upper pallet 3. At this time, when the object is moved onto the upper pallet 3, it is not necessary for the object to cross the guardrail 6, thus increasing the handling stroke and affecting the loading and unloading efficiency. When the motor 5 drives the large spiral lifting mechanism 4 to rise, the upper pallet 3 rises vertically, and the guardrail 6 rises relative to the upper pallet 3 through the transmission and drive mechanisms. When the upper pallet 3 rises to the top, the guardrail 6 rises on the drive mechanism. At this time, the guardrail 6 surrounds the upper pallet 3, achieving the effect of blocking the object placed on the upper pallet 3, preventing the object from slipping off the upper pallet 3, and improving the protection effect of the object.

[0044] As a further embodiment of this utility model, L-shaped frames 7 are fixedly installed at the four bottom corners of the guardrail 6, and the four L-shaped frames 7 are respectively connected to four drive mechanisms.

[0045] In this embodiment, the L-shaped frame 7 fixedly installed at the bottom of the guardrail 6 enables the guardrail 6 to remain connected to the drive mechanism, ensuring that the guardrail 6 can be raised and lowered above the drive mechanism when it is in motion, thus meeting the connection and usage requirements.

[0046] As a further embodiment of this utility model, the driving mechanism includes a fixed rod 8 and a screw 9 rotatably connected to the fixed rod 8 at one end.

[0047] One end of the fixed rod 8 is fixedly connected to the bottom of the upper support plate 3, and the other end of the screw 9 is rotatably connected to the bottom of the upper support plate 3. The end of the screw 9 rotatably connected to the fixed rod 8 is fixedly connected to the first helical gear 10, which is connected to the transmission mechanism.

[0048] In this embodiment, the first helical gear 10 is rotated by the transmission mechanism, so that the screw 9, which is fixedly connected to the first helical gear 10, will rotate between the bottom of the fixed rod 8 and the upper support plate 3. Since the screw 9 is threadedly connected to the L-shaped frame 7, the L-shaped frame 7 can be raised and lowered on the screw 9 for adjustment when the screw 9 is rotated, so as to meet the raising and lowering use of the guardrail 6.

[0049] As a further embodiment of this utility model, the transmission mechanism includes two first transmission rods 12 symmetrically arranged along the length direction of the upper support plate 3, a second helical gear 11 fixed at both ends of the first transmission rods 12, and a first single transmission wheel 13 fixed on the first transmission rods 12.

[0050] The first transmission rod 12 is rotatably connected between two fixed rods 8 set at one end of the upper support plate 3, and the second helical gear 11 is meshed with the first helical gear 10.

[0051] In this embodiment, the first transmission rod 12 is rotatably disposed between the two fixed rods 8. When the first transmission rod 12 rotates, the second helical gear 11 fixed above the first transmission rod 12 can mesh with the first helical gear 10 to drive the screw 9 to rotate for adjustment, thereby satisfying the lifting and lowering adjustment of the guardrail 6.

[0052] As a further embodiment of this utility model, the transmission mechanism also includes a second connecting frame 23 rotatably connected to one end of the first transmission rod 12, a first connecting frame 21 rotatably connected to the other end of the second connecting frame 23 via a rotating shaft 24, a second double transmission wheel 25 rotatably connected to the rotating shaft 24, and a linkage mechanism connected to the first connecting frame 21.

[0053] A rotating head 22 is fixedly installed at the end of the first connecting frame 21 away from the rotating shaft 24. The transmission position of the second double transmission wheel 25 away from the second connecting frame 23 is connected to the first single transmission wheel 13 via a belt. The other transmission position on the second double transmission wheel 25 is connected to the linkage mechanism via another belt.

[0054] In this embodiment, the linkage mechanism drives the belt on the first connecting frame 21 to move. The belt drives the second double transmission wheel 25, which is rotatably connected to the rotating shaft 24 at the junction of the first connecting frame 21 and the second connecting frame 23, to rotate. The second double transmission wheel 25 is driven by another belt to rotate the first single transmission wheel 13 on the first transmission rod 12. Thus, when the linkage mechanism rotates, the first single transmission wheel 13 rotates together. As the lower support plate 1 and the upper support plate 3 move closer or further apart, the first connecting frame 21 and the second connecting frame 23 are rotatably connected through the rotating shaft 24. When the distance between the lower support plate 1 and the upper support plate 3 is at its maximum, there is still an angle between the first connecting frame 21 and the second connecting frame 23. When the distance between the lower support plate 1 and the upper support plate 3 is at its minimum, the first connecting frame 21 and the second connecting frame 23 cross-fold, which does not hinder the operation and use of other components. This ensures that the transmission mechanism can maintain the transmission connection when the large spiral lifting scissor fork device is adjusted in height.

[0055] As a further embodiment of this utility model, the linkage mechanism includes a first double transmission wheel 17 fixed on the second transmission rod 16, a fourth helical gear 15 fixed to one end of the second transmission rod 16, a second single transmission wheel 18 connected to the first double transmission wheel 17 via another belt and fixedly connected to the third transmission rod 19, and a third single transmission wheel 20 symmetrically fixedly arranged on the third transmission rod 19 with the second single transmission wheel 18.

[0056] The second transmission rod 16 and the third transmission rod 19 are respectively rotatably mounted on two fixed blocks. The fixed blocks are fixedly connected to the lower support plate 1. The fixed blocks are rotatably connected to the rotating head 22. The fourth helical gear 15 is meshed with the third helical gear 14. The third helical gear 14 is fixedly connected to the output shaft of the motor 5.

[0057] In this embodiment, when the motor 5 is running, it can transmit a portion of the power to the second transmission rod 16 through the meshing of the third helical gear 14 and the fourth helical gear 15. The second transmission rod 16 and the third transmission rod 19 are connected by the first double transmission wheel 17, the second single transmission wheel 18 and the belt. The third transmission rod 19 can rotate with the rotation of the second transmission rod 16, thereby achieving the transmission effect. When the motor 5 drives the large spiral lifting mechanism 4 to adjust its height, the transmission structure and the drive mechanism can drive the guardrail 6 to adjust its height, achieving the linkage effect.

[0058] As a further embodiment of this utility model, the other transmission position of the first double transmission wheel 17 is connected to the other transmission position of one of the second double transmission wheels 25 via another belt, and the third single transmission wheel 20 is connected to the other transmission position of another second double transmission wheel 25 via another belt.

[0059] In this embodiment, the first double drive wheel 17 is connected to one of the second double drive wheels 25 via belt drive, and the third single drive wheel 20 is connected to the other second double drive wheel 25 via belt drive, thus meeting the requirements for linkage use. The first double drive wheel 17 and the third single drive wheel 20 are staggered, so the first connecting frame 21, the second connecting frame 23, the rotating shaft 24, and the second double drive wheel 25 connected to the first double drive wheel 17 and the third single drive wheel 20 are also staggered. Therefore, when the large spiral lifting scissor fork device is lowered and adjusted, the two transmission mechanisms will be staggered and will not affect each other's movement stroke.

[0060] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.

Claims

1. A large spiral lifting scissor fork device, comprising a lower support plate (1) and a top frame vertically disposed above the lower support plate (1); the lower support plate (1) and the top frame are connected by a scissor fork bracket (2), characterized in that, An upper support plate (3) is fixedly installed on the top frame. A large spiral lifting mechanism (4) is also provided between the lower support plate (1) and the upper support plate (3). The input shaft of the large spiral lifting mechanism (4) is coaxially fixed with the output shaft of the motor (5). The motor (5) is installed on the upper support plate (1). A guardrail lifting mechanism is provided on the upper support plate (3). The guardrail lifting mechanism includes a guardrail (6) slidably disposed around the upper support plate (3), a drive mechanism disposed at the four corners of the bottom of the upper support plate (3), and a transmission mechanism connecting the motor (5) and the drive mechanism. The motor (5) is used to drive the upper support plate (3) to move closer to or further away from the lower support plate (1) under the action of the scissor lift (2) by driving the large spiral lifting mechanism (4); the transmission mechanism is used to transmit the power of the motor (5) to the drive mechanism during the process of the upper support plate (3) moving closer to or further away from the lower support plate (1), and the drive mechanism is used to drive the guardrail (6) to rise and fall relative to the upper support plate (3).

2. The large spiral lifting scissor fork device according to claim 1, characterized in that, L-shaped frames (7) are fixedly installed at the four bottom corners of the guardrail (6), and the four L-shaped frames (7) are respectively connected to the four drive mechanisms.

3. The large spiral lifting scissor fork device according to claim 2, characterized in that, The driving mechanism includes a fixed rod (8) and a screw (9) rotatably connected at one end to the fixed rod (8); One end of the fixing rod (8) is fixedly connected to the bottom of the upper support plate (3), and the other end of the screw (9) is rotatably connected to the bottom of the upper support plate (3). The end of the screw (9) rotatably connected to the fixing rod (8) is fixedly connected to a first helical gear (10), which is connected to the transmission mechanism.

4. The large spiral lifting scissor fork device according to claim 3, characterized in that, The transmission mechanism includes two first transmission rods (12) symmetrically arranged along the length of the upper support plate (3), a second helical gear (11) fixed at both ends of the first transmission rods (12), and a first single transmission wheel (13) fixed on the first transmission rods (12); The first transmission rod (12) is rotatably connected between two fixed rods (8) provided at one end of the upper support plate (3), and the second helical gear (11) is meshed with the first helical gear (10).

5. The large spiral lifting scissor fork device according to claim 4, characterized in that, The transmission mechanism further includes a second connecting frame (23) rotatably connected to one end of the first transmission rod (12), a first connecting frame (21) rotatably connected to the other end of the second connecting frame (23) via a rotating shaft (24), a second double transmission wheel (25) rotatably connected to the rotating shaft (24), and a linkage mechanism connected to the first connecting frame (21); A rotating head (22) is fixedly provided at one end of the first connecting frame (21) away from the rotating shaft (24). The transmission position of the second double transmission wheel (25) away from the second connecting frame (23) is connected to the first single transmission wheel (13) via a belt. The other transmission position on the second double transmission wheel (25) is connected to the linkage mechanism via another belt.

6. The large spiral lifting scissor fork device according to claim 5, characterized in that, The linkage mechanism includes a first double transmission wheel (17) fixed on the second transmission rod (16), a fourth helical gear (15) fixed to one end of the second transmission rod (16), a second single transmission wheel (18) connected to the first double transmission wheel (17) via another belt and fixedly connected to the third transmission rod (19), and a third single transmission wheel (20) symmetrically fixed on the third transmission rod (19) with respect to the second single transmission wheel (18); The second transmission rod (16) and the third transmission rod (19) are respectively rotatably mounted on two fixed blocks. The fixed blocks are fixedly connected to the lower support plate (1). The fixed blocks are rotatably connected to the rotating head (22). The fourth helical gear (15) is meshed with the third helical gear (14). The third helical gear (14) is fixedly connected to the output shaft of the motor (5).

7. A large spiral lifting scissor fork device according to claim 6, characterized in that, The other drive position of the first double drive wheel (17) is connected to the other drive position of one of the second double drive wheels (25) via another belt, and the third single drive wheel (20) is connected to the other drive position of another second double drive wheel (25) via another belt.

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