A left scissor fork of an elevator

Abstract

The utility model discloses a left scissor fork of lifter, including base and fixed link, the fixed link fixed connection is in the inner wall of base, the top of base is equipped with first movable link and second movable link, first movable link and second movable link cross each other and set up, the movable sleeve of fixed link's link wall is equipped with connecting seat, the lateral wall of connecting seat is fixedly connected with hydraulic cylinder, the link wall of first movable link is equipped with opening. The piston rod of hydraulic cylinder in the utility model can push the fixed seat to move, pushes the both ends of first movable link and second movable link and swing along the position of crossing each other respectively, can push the lifting of connecting frame and connecting frame, and the piston rod of hydraulic cylinder can make the both ends of first movable link and second movable link swing reversely along the position of crossing each other respectively, can make connecting frame and connecting frame drop down, can guarantee the lifting drive demand of scissor fork.

Description

Technical Field

[0001] This utility model relates to the field of lifting device technology, specifically a left scissor fork of a lifting device. Background Technology

[0002] A scissor lift, also known as a scissor scissor platform, is a specialized piece of equipment for aerial work. It uses hydraulic cylinders to extend and retract the scissor arms, thereby raising and lowering the platform. When the hydraulic cylinder pushes the scissor arms, they open like scissors, raising the platform; similarly, when the hydraulic cylinder retracts, the scissor arms close like a fork, lowering the platform.

[0003] In existing technologies, lifting devices require scissor fork-driven adjustment during use. However, the scissor fork has a limited lifting distance, making it inconvenient to monitor its extension distance in real time. If the hydraulic cylinder continues to push after the scissor fork has reached its limit, it will cause pressure and wear on the scissor fork structure, affecting its strength and service life. Therefore, this application designs a left scissor fork for the lifting device. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a left scissor fork of a lifting device to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] This utility model provides a left scissor fork for a lifting device, including a base and a fixed rod. The fixed rod is fixedly connected to the inner wall of the base. A first movable rod and a second movable rod are provided above the base, and the first and second movable rods are arranged intersecting each other. A connecting seat is movably sleeved on the wall of the fixed rod. A hydraulic cylinder is fixedly connected to the side wall of the connecting seat. An opening is provided on the wall of the first movable rod, and a fixed seat is fixedly connected to the inner wall of the opening. The piston rod end of the hydraulic cylinder is hinged to the side wall of the fixed seat. A first connecting rod is fixedly connected to the side wall of the first movable rod. The end of the first connecting rod passes through the first movable rod and is rotatably connected to a connecting frame. A connecting bracket is fixedly connected to the side wall of the connecting frame. A pressure block is fixedly connected to the end of the first movable rod. Controllers are fixedly connected to the upper and lower inner walls of the connecting frame, respectively. A pressure sensor is provided on the side of the controller opposite to the pressure block, and an alarm is provided on the side of the controller away from the pressure block.

[0007] Preferably, the inner walls of the first movable rod and the second movable rod at their intersection are respectively provided with through holes, and the inner walls of the first movable rod and the second movable rod at the through holes are simultaneously provided with rotatable pins.

[0008] Preferably, the ends of the first and second movable rods opposite to the hydraulic cylinder are respectively rotatably connected to sliding rods, and the inner walls of the base and the connecting frame are respectively provided with rectangular grooves, and the rod wall of the sliding rod is slidably disposed on the inner wall of the rectangular groove.

[0009] Preferably, the walls of the two slide rods pass through the first movable rod and the second movable rod respectively and are fixedly connected to a connecting plate, and the two connecting plates are fixedly connected to a second connecting rod on the side opposite to the slide rod.

[0010] Preferably, the ends of the first movable rod and the second movable rod are respectively set as semi-circular, and the controller is set as an arc surface on one side relative to the first movable rod and is slidably disposed at the end of the first movable rod.

[0011] Preferably, the controller has a sound amplification slot on the side away from the pressure block, and the alarm is installed on the inner wall of the sound amplification slot.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The left scissor fork of the lifting device can push the fixed base to move by extending the piston rod of the hydraulic cylinder. This pushes the two ends of the first and second movable rods to swing closer to each other at the intersection, which can lift the connecting frame and the connecting bracket. When the piston rod of the hydraulic cylinder retracts, the two ends of the first and second movable rods can swing in opposite directions at the intersection, which can lower the connecting frame and the connecting bracket, thus ensuring the lifting drive requirements of the scissor fork.

[0014] 2. The left scissor fork of the lifting device, after moving through the first movable rod, will drive the pressure block to move until the pressure block presses against the pressure sensor set on the side wall of the controller. This causes the pressure sensor to transmit an electrical signal to the controller, which then controls the alarm to sound an alarm. This can provide early warning and prevent the piston rod of the hydraulic cylinder from excessively extending or retracting, which could damage the first and second movable rods.

[0015] 3. The left scissor fork of the lifting device can improve the stability of the first and second movable rods when they swing and change by sliding along the inner wall of the rectangular groove through the end slide rod. The first and second connecting rods can respectively ensure the synchronicity of the scissor fork changes on both sides. Attached Figure Description

[0016] Figure 1 This is a three-dimensional front view of the present invention;

[0017] Figure 2 This is a three-dimensional top-view diagram of the present invention;

[0018] Figure 3This is a schematic diagram of the structure of the first and second movable rods of this utility model;

[0019] Figure 4 This utility model Figure 3 A magnified schematic diagram of part A in the middle section.

[0020] In the diagram: 1. Base; 2. Fixed rod; 3. First movable rod; 4. Connecting seat; 5. Hydraulic cylinder; 6. Fixed seat; 7. Second movable rod; 8. Pin; 9. First connecting rod; 10. Connecting frame; 11. Connecting bracket; 12. Slide rod; 13. Connecting plate; 14. Second connecting rod; 15. Pressure block; 16. Controller; 17. Pressure sensor; 18. Alarm. Detailed Implementation

[0021] A type of lift with a left scissor fork, such as Figure 1-4 As shown, the device includes a base 1 and a fixed rod 2. The fixed rod 2 is fixedly connected to the inner wall of the base 1. A first movable rod 3 and a second movable rod 7 are provided above the base 1. The first movable rod 3 and the second movable rod 7 are arranged intersecting each other. A connecting seat 4 is movably sleeved on the rod wall of the fixed rod 2. A hydraulic cylinder 5 is fixedly connected to the side wall of the connecting seat 4. An opening is provided on the rod wall of the first movable rod 3. A fixed seat 6 is fixedly connected to the inner wall of the opening of the first movable rod 3. The piston rod end of the hydraulic cylinder 5 is hinged to the side wall of the fixed seat 6. A first connecting rod 9 is fixedly connected to the side wall of the first movable rod 3. The end of the first connecting rod 9 passes through the first movable rod 3 and is rotatably connected to a connecting frame 10. A connecting bracket 11 is fixedly connected to the side wall of the connecting frame 10. A pressure block 15 is fixedly connected to the end of the first movable rod 3. A controller 16 is fixedly connected to the upper and lower inner walls of the connecting frame 10, respectively. A pressure sensor 17 is provided on the side of the controller 16 opposite to the pressure block 15. An alarm 18 is provided on the side of the controller 16 away from the pressure block 15.

[0022] The first movable rod 3 and the second movable rod 7 are respectively provided with through holes on the inner walls at their intersection, and the first movable rod 3 and the second movable rod 7 are rotatably provided with pins 8 on the inner walls of the through holes.

[0023] In summary: the extension of the piston rod of the hydraulic cylinder 5 can push the fixed base 6 to move, causing the two ends of the first movable rod 3 and the second movable rod 7 to swing closer to each other at their intersection, which can lift the connecting frame 10 and the connecting bracket 11. Conversely, the retraction of the piston rod of the hydraulic cylinder 5 can cause the two ends of the first movable rod 3 and the second movable rod 7 to swing in opposite directions at their intersection, which can lower the connecting frame 10 and the connecting bracket 11. This ensures the lifting and lowering drive requirements of the scissor fork. After the first movable rod 3 moves, it will drive the pressure block 15 to move until the pressure block 15 presses against the pressure sensor 17 set on the side wall of the controller 16. The pressure sensor 17 transmits an electrical signal to the controller 16, causing the controller 16 to control the alarm 18 to sound an alarm. This provides early warning and prevents the piston rod of the hydraulic cylinder 5 from excessively extending or retracting, which could damage the first movable rod 3 and the second movable rod 7, affecting their strength and ensuring the structural strength of the scissor fork.

[0024] To improve the stability of the first movable rod 3 and the second movable rod 7 during swinging, such as Figure 1-4 As shown, the first movable rod 3 and the second movable rod 7 are rotatably connected to the end opposite to the hydraulic cylinder 5 by a sliding rod 12. The inner walls of the base 1 and the connecting frame 10 are respectively provided with rectangular grooves. The rod wall of the sliding rod 12 is slidably disposed on the inner wall of the rectangular groove. The rod walls of the two sliding rods 12 pass through the first movable rod 3 and the second movable rod 7 respectively and are fixedly connected to a connecting plate 13. The two connecting plates 13 are respectively fixedly connected to the side opposite to the sliding rod 12 by a second connecting rod 14.

[0025] When the first movable rod 3 and the second movable rod 7 swing and change, the sliding rod 12 at the end slides along the inner wall of the rectangular groove, which can improve the stability of the first movable rod 3 and the second movable rod 7 swinging. The first connecting rod 9 and the second connecting rod 14 can respectively ensure the synchronization of the scissor fork change on both sides.

[0026] To ensure the warning effect of the early warning, such as Figure 1-4 As shown, the ends of the first movable rod 3 and the second movable rod 7 are respectively set as semi-circular. The controller 16 is set as an arc surface on one side relative to the first movable rod 3 and is slidably disposed at the end of the first movable rod 3. A sound amplification groove is opened on the side of the controller 16 away from the pressure block 15, and the alarm 18 is disposed on the inner wall of the sound amplification groove.

[0027] The end of the first movable rod 3 is set to be semi-circular, which can reduce the collision with the controller 16 when moving and ensure the stable use of the controller 16. The alarm 18 is set inside the loudspeaker slot, which can improve the loudspeaker effect when the alarm is issued and ensure the warning effect of the warning.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A left scissor fork of a lifting device, comprising a base (1) and a fixing rod (2), characterized in that: The fixed rod (2) is fixedly connected to the inner wall of the base (1). A first movable rod (3) and a second movable rod (7) are provided above the base (1). The first movable rod (3) and the second movable rod (7) are arranged intersecting each other. A connecting seat (4) is movably sleeved on the rod wall of the fixed rod (2). A hydraulic cylinder (5) is fixedly connected to the side wall of the connecting seat (4). An opening is provided on the rod wall of the first movable rod (3). A fixed seat (6) is fixedly connected to the inner wall of the opening of the first movable rod (3). The piston rod end of the hydraulic cylinder (5) is hinged to the side wall of the fixed seat (6). A first connecting rod (9) is fixedly connected to the side wall of the first movable rod (3). The end of the first connecting rod (9) passes through the first movable rod (3) and is rotatably connected to a connecting frame (10). A connecting bracket (11) is fixedly connected to the side wall of the connecting frame (10). A pressure block (15) is fixedly connected to the end of the first movable rod (3). A controller (16) is fixedly connected to the upper and lower inner walls of the connecting frame (10). A pressure sensor (17) is provided on the side of the controller (16) opposite to the pressure block (15). An alarm (18) is provided on the side of the controller (16) away from the pressure block (15).

2. The left scissor fork of the lifting device according to claim 1, characterized in that: The first movable rod (3) and the second movable rod (7) are respectively provided with through holes on the inner walls at their intersection, and the first movable rod (3) and the second movable rod (7) are rotatably provided with pins (8) on the inner walls of the through holes.

3. The left scissor fork of the lifting device according to claim 1, characterized in that: The first movable rod (3) and the second movable rod (7) are respectively rotatably connected to the end opposite to the hydraulic cylinder (5) by a sliding rod (12). The inner walls of the base (1) and the connecting frame (10) are respectively provided with rectangular grooves, and the rod wall of the sliding rod (12) is slidably disposed on the inner wall of the rectangular groove.

4. The left scissor fork of the lifting device according to claim 3, characterized in that: The walls of the two sliding rods (12) pass through the first movable rod (3) and the second movable rod (7) respectively and are fixedly connected to the connecting plate (13). The two connecting plates (13) are fixedly connected to the second connecting rod (14) on the side away from the sliding rod (12).

5. The left scissor fork of the lifting device according to claim 1, characterized in that: The ends of the first movable rod (3) and the second movable rod (7) are respectively set as semi-circular, and the controller (16) is set as an arc surface on one side relative to the first movable rod (3) and is slidably disposed at the end of the first movable rod (3).

6. The left scissor fork of the lifting device according to claim 1, characterized in that: The controller (16) has a sound amplification slot on the side away from the pressure block (15), and the alarm (18) is installed on the inner wall of the sound amplification slot.

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