Improved lifting frame for lifting structures

Abstract

The utility model discloses a kind of lifting frames of improved lifting structure, it is characterized by still with the other end of linear driver connection and in the contraction process of linear driver push connector and drive lifting support to lift the driving element, the driving element includes the roller frame connected with linear driver and the roller group movably mounted on roller frame.This utility model uses roller group as driving element contacted with lifting arm, large roller in roller group is used for contacting with roller seat, small roller is contacted with lifting arm, when roller group is moved by linear driver pulling, friction between roller group, roller seat and lifting arm is dispersed, at the same time, the design of roller can produce rotation when being rubbed, so that the friction in lifting frame lifting process can be effectively reduced, and then the power when power source drives linear driver to drive lifting frame to lift can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to a lifting frame, specifically a lifting frame with an improved lifting structure. Background Technology

[0002] Currently, there are many types of car lifting equipment on the market with different structures. They are mainly used in car manufacturing plants and repair shops. Traditional lifting frames have complex structures, large size, and need to be fixed in place, making them inconvenient to use. The lifting of car lifting frames is basically driven by hydraulic cylinders. One end of the hydraulic cylinder is connected to the lower support of the lifting frame, and the piston rod at the other end of the hydraulic cylinder is connected to the upper support of the lifting frame. The lifting frame is lifted by pushing the upper support through the extension of the piston rod of the hydraulic cylinder. The current requirement is to design a lifting frame that uses a hydraulic cylinder to pull a drive component, which in turn pushes the boom of the lifting frame, causing it to rotate and thus lifting the frame. However, in this design, the friction between the boom and the drive component is relatively high when they contact each other and generate the thrust to rotate the boom, leading to an increase in the power source required to drive the hydraulic cylinder. Therefore, an improved lifting frame with a different lifting structure is proposed. Utility Model Content

[0003] The purpose of this invention is to propose an improved lifting frame with an improved lifting structure to solve the above problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an improved lifting structure lifting frame, including a lifting bracket and a linear actuator movably connected to the lifting bracket at one end. The lifting bracket includes an upper bracket and a lower bracket, and a lifting arm that moves the upper and lower brackets via a pin. The feature is that it also includes a driving component connected to the other end of the linear actuator, which pushes a connecting member during the retraction of the linear actuator to lift the lifting bracket. The driving component includes a roller frame connected to the linear actuator and a roller assembly movably mounted on the roller frame.

[0005] More preferably, it also includes a roller seat installed on one side of the lower support to guide the movement of the rollers and is inclined. The roller assembly includes a large roller that is movably mounted on the roller frame via a shaft and is in contact with the roller seat, and a small roller that is movably mounted on the roller frame via a shaft and is in contact with the lifting arm.

[0006] A further preferred embodiment includes a limiting platform disposed on the large roller to limit the position of the large roller on the roller frame.

[0007] A further preferred embodiment includes a lifting surface disposed on the lifting arm and in contact with the small rollers, which changes the lifting speed and shortens the length of the linear drive during the lifting process of the lifting frame. The lifting surface is composed of several surfaces with different inclination angles.

[0008] A further preferred embodiment includes a tension spring that connects the other lifting arm and the lower support to drive the lifting support to descend and reset.

[0009] A further preferred embodiment includes a mechanical lock installed on the lifting bracket to prevent a sudden drop after the lifting bracket has been raised.

[0010] More preferably, the mechanical lock includes a U-shaped base frame mounted on the lower bracket, several blocks disposed within the U-shaped base frame, a support member whose one end is movably connected to the upper bracket via a pin, a support block mounted on the support member, a rotating member movably mounted on the support block via a pin, and a torsion spring mounted on the pin with one end connected to the support block and the other end abutting against the support member.

[0011] The beneficial effects of this utility model are as follows: By using a roller assembly as the driving component that contacts the lifting arm, the large roller in the roller assembly is used to contact the roller seat, and the small roller is used to contact the lifting arm. When the roller assembly is moved by the linear drive, the friction between the roller assembly, the roller seat and the lifting arm is dispersed. At the same time, the roller design can generate rotation when subjected to friction, thereby effectively reducing the friction during the lifting process of the lifting frame, and thus effectively reducing the power required by the power source to drive the linear drive to lift the lifting frame. By setting up lifting surfaces composed of several surfaces with different inclination angles on the boom, when the small rollers driven by the linear actuator come into contact with the lifting surfaces and generate thrust, the small rollers move along the lifting surfaces during the boom's rotation. When the surfaces with smaller inclination angles come into contact with the small rollers and the small rollers move at the same speed, the surface with smaller inclination angles lifts at a slower speed, while the surface with larger inclination angles lifts at a faster speed. By using surfaces with different inclination angles to form lifting surfaces, the lifting speed of the lifting frame can be varied. At the same time, the surface with larger inclination angles can lift higher with a smaller distance of movement of the small rollers, thereby effectively shortening the overall length of the linear actuator and saving overall space and cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from another perspective; Figure 3 This is a partial structural schematic diagram of the present invention.

[0013] Legend: 1. Lifting bracket; 11. Upper bracket; 12. Lower bracket; 13. Lifting arm; 14. Lifting surface; 15. Limiting platform; 2. Linear actuator; 3. Roller frame; 31. Roller assembly; 32. Large roller; 33. Small roller; 4. Tension spring; 5. U-shaped base frame; 51. Stop block; 52. Support component; 53. Rotating component; 6. Support block; 7. Torsion spring; 8. Roller seat; 9. Wheel. Detailed Implementation

[0014] The following description, in conjunction with the accompanying drawings, further illustrates an improved lifting structure for this utility model.

[0015] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] See Figures 1-3 As shown, an improved lifting structure lifting frame includes a lifting bracket 1 and a linear actuator 2 movably connected to the lifting bracket 1 at one end. The lifting bracket 1 includes an upper bracket 11 and a lower bracket 12, and a lifting arm 13 that moves the upper bracket 11 and the lower bracket 12 via a pin. It is characterized by a driving component that is also connected to the other end of the linear actuator 2 and pushes the connecting member to drive the lifting bracket 1 to lift during the retraction of the linear actuator 2. The driving component includes a roller frame 3 connected to the linear actuator 2 and a roller assembly 31 movably mounted on the roller frame 3 and in contact with the lifting arm 13. The linear actuator 2 can be a pneumatic cylinder or a hydraulic cylinder. When the lifting bracket 1 is lifted, the linear actuator 2 drives the piston rod to retract. The piston rod drives the roller frame 3 and the roller group 31 to move. During the movement, the small rollers 33 in the roller group 31 squeeze the lifting arm 13 on this side, causing the lifting arm 13 to rotate along the movable connection point with the upper bracket 11 and the lower bracket 12, thereby driving the lifting bracket 1 to lift. It also includes a roller seat 8 installed on one side of the lower bracket 12 to guide the movement of the rollers and is inclined. The roller group 31 includes a large roller 32 that is movably mounted on the roller frame 3 via a shaft and is in contact with the roller seat 8, and a small roller 33 that is movably mounted on the roller frame 3 via a shaft and is in contact with the lifting arm 13. By employing a roller assembly 31 as the driving component that contacts the lifting arm 13, the large roller 32 in the roller assembly 31 contacts the roller seat 8, while the small roller 33 contacts the lifting arm 13. When the roller assembly 31 is moved by the linear actuator 2, the frictional force between the roller assembly 31, the roller seat 8, and the lifting arm 13 is dispersed. Meanwhile, the rollers are designed to rotate, which can rotate when subjected to friction. This can convert sliding friction into rolling friction, thereby effectively reducing the friction during the lifting process of the lifting frame. This can effectively reduce the power required for the power source to drive the linear actuator 2 to lift the lifting frame, and also effectively reduce wear.

[0018] In one embodiment, a limiting platform 15 is also provided on the large roller 32 to limit the position of the large roller 32 on the roller frame 3. By setting the limiting platform 15, the position and movement of the large roller 32 on the roller frame 3 are limited, so that the large roller 32 moves in a straight line when moving, avoiding the problem of deflection caused by positional deviation.

[0019] In one embodiment, a roller seat 8 is installed on one side of the lower bracket 12 and is inclined to guide the movement of the roller; the roller seat 8 guides the movement of the roller.

[0020] In one embodiment, a tension spring 4 is also included, which connects the other lifting arm 13 and the lower support 12 to drive the lifting support 1 to descend and reset. With the tension spring 4, the lifting support 1 pulls the tension spring 4 when it is lifted, and the lifting support 1 is driven to descend and reset by the tension of the tension spring 4 when it is lowered.

[0021] In one embodiment, a mechanical lock is also provided on the lifting bracket 1 to prevent a sudden drop after the lifting bracket 1 is lifted; by providing the mechanical lock, a sudden drop of the lifting bracket 1 due to malfunction or other reasons is prevented during the lifting process.

[0022] In one embodiment, the mechanical lock includes a U-shaped base frame 5 mounted on the lower bracket 12, a plurality of blocks 51 disposed within the U-shaped base frame 5, a support member 52 whose one end is movably connected to the upper bracket 11 via a pin, a support block 6 mounted on the support member 52, a rotating member 53 movably mounted on the support block 6 via a pin, and a torsion spring 7 mounted on the pin, one end of which is connected to the support block 6 and the other end of which abuts against the support member 52. The U-shaped base frame 5 limits and guides the movement of the support 52, support block 6 and rotating part 53. The stop block 51 blocks the support 52 and protects against sudden drop of the lifting bracket 1. The stop block 51 prevents sudden drop of the lifting bracket 1 at different heights. The torsion spring 7 is used to apply an additive force to the rotating part 53, causing the rotating part 53 to abut against the U-shaped base frame 5. The rotating part 53 is also used to allow the operator to manually move the rotating part 53 to pass the stop block 51 to complete the unlocking process. After unlocking, the lifting bracket 1 can continue to descend.

[0023] In one embodiment, wheels 9 are also mounted on the lifting bracket 1; the wheels 9 facilitate movement after the lifting bracket 1 is retracted.

[0024] When this utility model is in use: the power source provides power to the linear actuator 2, which drives the linear actuator 2 to retract the piston rod. The piston rod pulls the roller frame 3 and the roller to move backward. During the process of the roller moving backward along the roller seat 8, the roller applies a compressive force to the lifting arm 13, which drives the lifting arm 13 to rotate around the pin that is movably connected to the upper bracket 11 and the lower bracket 12 as the base point, so that the lifting bracket 1 is lifted. During the lifting process, the lifting bracket 1 drives one end of the support member 52 to rotate via a pin that is movably connected to the upper bracket 11, and the other end drives the support block 6 and the rotating member 53 to move along the U-shaped base frame 5. After the support block 6 and the rotating member 53 come into contact with the stop block 51 during the movement, the rotating member 53 is blocked during the continuous movement and then compresses the torsion spring 7 to rotate until the rotating member 53 passes the stop block 51 and is driven to return to its original position against the U-shaped base frame 5 by the restoring force of the torsion spring 7. When the lifting bracket 1 descends, the power source stops supplying power to the linear drive 2. The lifting bracket 1 is driven to descend by the gravity of the lifted item on the lifting frame and the restoring force of the tension spring 4. During the descent of the lifting bracket 1, when the rotating part 53 abuts against the stop block 51, the operator moves the rotating part 53 to pass the stop block 51 to unlock it, and the lifting bracket 1 can continue to descend.

[0025] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. A lifting frame with an improved lifting structure, comprising a lifting bracket (1) and a linear actuator (2) movably connected at one end to the lifting bracket (1), the lifting bracket (1) comprising an upper bracket (11) and a lower bracket (12) and a lifting arm (13) that moves the upper bracket (11) and the lower bracket (12) via a pin; characterized in that Also connected to the other end of the linear actuator (2) is a drive unit that pushes the connector during the retraction of the linear actuator (2) to lift the lifting bracket (1). The drive unit includes a roller frame (3) connected to the linear actuator (2) and a roller assembly (31) movably mounted on the roller frame (3).

2. The lifting frame with an improved lifting structure according to claim 1, characterized in that: It also includes a roller seat (8) installed on one side of the lower bracket (12) to guide the movement of the roller assembly (31) and is inclined. The roller assembly (31) includes a large roller (32) that is movably mounted on the roller frame (3) via a shaft and is in contact with the roller seat (8) and a small roller (33) that is movably mounted on the roller frame (3) via a shaft and is in contact with the lifting arm (13).

3. The lifting frame with an improved lifting structure according to claim 2, characterized in that: It also includes a limiting platform (15) set on the large roller (32) to limit the position of the large roller (32) on the roller frame (3).

4. The lifting frame with an improved lifting structure according to claim 2, characterized in that: It also includes a lifting surface (14) set on the lifting arm (13) in contact with the small roller (33) and which changes the lifting speed and shortens the length of the linear drive (2) during the lifting process of the lifting frame. The lifting surface (14) is composed of several surfaces with different inclination angles.

5. A lifting frame with an improved lifting structure according to claim 2, characterized in that: It also includes a tension spring (4) that connects the other lifting arm (13) and the lower support (12) to drive the lifting support (1) to descend and reset.

6. The lifting frame with an improved lifting structure according to claim 1, characterized in that: It also includes a mechanical lock installed on the lifting bracket (1) to prevent a sudden drop after the lifting bracket (1) is lifted.

7. A lifting frame with an improved lifting structure according to claim 6, characterized in that: The mechanical lock includes a U-shaped base frame (5) mounted on the lower bracket (12), several blocks (51) set in the U-shaped base frame (5), a support member (52) whose one end is movably connected to the upper bracket (11) by a pin, a support block (6) mounted on the support member (52), a rotating member (53) movably mounted on the support block (6) by a pin, and a torsion spring (7) mounted on the pin and connected to the support block (6) at one end and abutting against the support member (52) at the other end.

8. A lifting frame with an improved lifting structure according to claim 1, characterized in that: It also includes wheels (9) mounted on the lifting bracket (1).

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