Safety protection device for preventing free falling of skid type undercarriage

Abstract

The utility model relates to a safety protection device for preventing free falling of a skid type undercarriage, which comprises a square frame-shaped main frame body arranged below a linear guide rail mechanism, two anti-falling slide rails are symmetrically arranged at two ends of the main frame body, and the length direction of the anti-falling slide rails is consistent with the conveying direction of the linear guide rail mechanism. The four corners of the main frame body are each provided with a transverse extension rod, the bottom face of each extension rod is provided with a vertical rolling wheel located over the corresponding anti-falling sliding rail, the bottom face of each extension rod is perpendicularly provided with a vertical rod, and the outer side face of each vertical rod is provided with a transverse rolling wheel corresponding to the side face of the corresponding anti-falling sliding rail; during production operation, the rolling wheels move forwards close to the anti-falling sliding rails at the ends of the main frame body, the rolling wheels at the two ends can be supported on the anti-falling sliding rails when the main frame body freely falls off due to faults, the safety protection effect is achieved, and the phenomenon that a vehicle body is damaged along with falling of the frame body and even the safety of production personnel is threatened is avoided.

Description

Technical Field

[0001] This utility model relates to the field of assembly line equipment, and in particular to a safety protection device for preventing skid-type landing gear from falling freely. Background Technology

[0002] Skid-type landing gear lifting systems are widely used in various stages of automotive production lines, including body assembly, parts lifting, and pre-painting pretreatment. These systems are typically made of high-strength steel, possessing sufficient strength and rigidity to withstand various stresses during the lifting process. Automation and mechanization reduce manual operation time and improve production efficiency. This type of lifting system involves a linear guide mechanism installed at the top of the workshop, with the lifting device connected to it. A mounting bracket connected to the vehicle body is installed below the lifting device, and the linear guide mechanism drives the lifting device to move the vehicle body linearly for assembly line production. However, a problem exists: if the linear guide mechanism or the lifting device malfunctions, the suspended vehicle body can fall rapidly and freely, causing damage and threatening the safety of production personnel. This requires improvement. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a safety protection device to prevent the skid-type landing gear from falling freely.

[0004] The technical solution of this utility model is: a safety protection device to prevent the free fall of a skid-type landing gear, comprising a square frame main body installed below a linear guide rail mechanism. The main frame is arranged horizontally, and two anti-fall rails are symmetrically provided at both ends of the main frame. The anti-fall rails are supported by several vertical pillars. The lower ends of the vertical pillars are fixed in the workshop ground foundation with concrete. The length direction of the anti-fall rails is consistent with the conveying direction of the linear guide rail mechanism. Horizontal extension rods are provided at the four corners of the main frame. Vertical rollers are provided on the bottom surface of the extension rods, located directly above the anti-fall rails. Vertical rods are provided vertically on the bottom surface of the extension rods. The vertical rods and extension rods form a T-shaped structure. Horizontal rollers corresponding to the sides of the anti-fall rails are provided on the outer side of the vertical rods. The size of the horizontal rollers is the same as that of the vertical rollers.

[0005] Preferably, two square chassis brackets are symmetrically provided at both ends of the main frame. The lower end of the chassis bracket is close to the workshop floor. A drive mechanism is provided in the middle of the main frame. The upper end of the chassis bracket is connected to the main frame through a rotating shaft. The drive mechanism is connected to the two rotating shafts.

[0006] Preferably, the drive mechanism includes a geared motor, a first connecting rod, and a second connecting rod. The first connecting rod and the second connecting rod are of the same length. A swing plate is vertically provided at the outer end of the output shaft of the geared motor. The two ends of the swing plate are respectively hinged to the inner ends of the first connecting rod and the second connecting rod. A hinge support is provided in the middle of the rotating shaft. The hinge support is welded and fixed to the outer side of the rotating shaft in a radial direction. The outer end of the first connecting rod is hinged to the hinge support on one end of the rotating shaft, and the second connecting rod is hinged to the hinge support on the other end of the rotating shaft.

[0007] Preferably, the chassis bracket is in the shape of a square frame, and both ends of the bottom rod of the chassis bracket are provided with L-shaped supports. The bottom rod is arranged in two parallel columns, and the ends of the L-shaped supports are provided with rubber pads.

[0008] Preferably, the L-shaped support is connected to the bottom rod body through a clamping plate assembly. The clamping plate assembly includes an inner plate body fixed to the outer side of the L-shaped support and an outer plate body correspondingly disposed on the outer side of the bottom rod body. Bolts are installed between the two ends of the inner plate body and the outer plate body to tighten and fix them together.

[0009] Preferably, the end of the anti-fall slide rail is provided with a downwardly bent guide rail body.

[0010] The beneficial technical effects of this utility model are:

[0011] This utility model arranges anti-fall rails at both ends of the landing gear main frame. Rollers corresponding to the upper and inner surfaces of the anti-fall rails are installed at the ends of the main frame. During production operations, the rollers move forward close to the anti-fall rails at the ends of the main frame. If a malfunction causes the main frame to fall freely, the rollers at both ends can support it on the anti-fall rails, playing a safety protection role and preventing the vehicle body from falling with the frame and being damaged or even threatening the safety of production personnel. Attached Figure Description

[0012] Figure 1 This is a front view structural diagram of the present invention in the hoisting state;

[0013] Figure 2 This is a three-dimensional structural diagram of the present invention (with the winch removed).

[0014] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0015] Figure 4 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 5 This is a three-dimensional structural diagram of the present invention after the anti-fall rail has been removed.

[0017] In the diagram, 1. Main frame, 11. Extension rod, 12. Vertical roller, 13. Vertical rod, 14. Horizontal roller, 15. Chassis bracket, 16. Rotating shaft, 17. L-shaped support, 18. Hinge support, 2. Anti-fall slide rail, 21. Column, 22. Guide rail, 31. Gear motor, 32. Swing plate, 33. First connecting rod, 34. Second connecting rod, 41. Winch, 42. Wire rope, 43. Hook, 45. Diamond-shaped connecting rod bracket. Detailed Implementation

[0018] Example 1, see appendix Figure 1-5 A safety protection device for preventing skid-type landing gear from falling freely includes a square frame 1 installed below a linear guide mechanism. The main frame 1 has lugs in the middle of both sides. A sliding support is provided above the linear guide mechanism. The sliding support is driven to move by the linear guide mechanism. Two winches 41 are symmetrically arranged on both sides of the sliding support. The hooks 43 at the lower end of the wire ropes 42 of the winches 41 are hooked into the lugs. A diamond-shaped connecting rod bracket 45 is provided between the main frame 1 and the linear guide mechanism.

[0019] Two anti-fall slide rails 2 are symmetrically provided at both ends of the main frame 1. The anti-fall slide rails are installed at a certain height through the column 21. The length direction of the anti-fall slide rail 2 is consistent with the conveying direction of the linear guide mechanism. The four corners of the main frame 1 are provided with transverse extension rods 11. The bottom surface of the extension rod is provided with a vertical roller 12 located directly above the anti-fall slide rail 2. The bottom surface of the extension rod 11 is provided with a vertical rod 13. The outer side of the vertical rod is provided with a transverse roller 14 corresponding to the side of the anti-fall slide rail 2.

[0020] During production, the horizontal roller 14 travels along the inner side of the anti-fall rail 2, which serves as a lateral limit to prevent the main frame 1 and the car body hoisted at its lower end from swaying laterally, thus ensuring the stability of the car body assembly. The vertical roller 12 moves forward close to the upper surface of the anti-fall rail 2. If a malfunction causes the main frame 1 to fall freely, the vertical roller 12 can be supported on the anti-fall rail 2, which plays a safety protection role and prevents the car body from falling and being damaged or even threatening the safety of production personnel.

[0021] The end of the fall arresting slide rail 2 is provided with a downwardly bent guide rail body 22. When the main frame 1 enters the fall arresting slide rail 2, the guide rail body 22 provides a guide for the vertical roller 12 to enter the track, ensuring that the vertical roller 12 can smoothly enter the top of the fall arresting slide rail 2.

[0022] Example 2, see appendix Figure 4-5This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that: two square chassis brackets 15 are symmetrically provided at both ends of the main frame 1, and the distance between the two chassis brackets matches the width of the vehicle body. A drive mechanism is provided in the middle of the main frame 1. The upper end of the chassis bracket 15 is connected to the main frame 1 through a rotating shaft 16. The chassis bracket can rotate and swing at the end of the main frame 1 through the rotating shaft 16. The drive mechanism includes a reduction motor 31, a first connecting rod 33, and a second connecting rod 34. A swing plate 32 is vertically provided at the outer end of the output shaft of the machine 31. The two ends of the swing plate are respectively hinged to the inner ends of the first connecting rod 33 and the second connecting rod 34. The reduction motor 31 is started to drive the swing plate 32 to rotate. The swing plate 32 drives the first connecting rod 33 and the second connecting rod 34 on both sides to move in opposite directions synchronously. A hinge support 18 is provided in the middle of the rotating shaft 16. The outer end of the first connecting rod 33 is hinged to the hinge support 18 on one end of the rotating shaft 16, and the second connecting rod 34 is hinged to the hinge support 18 on the other end of the rotating shaft 16.

[0023] The chassis bracket 15 is generally square in shape. Both ends of the bottom rod of the chassis bracket 15 are provided with L-shaped supports 17. The ends of the L-shaped supports 17 are provided with rubber pads. The L-shaped supports are used to support the bottom plate of the vehicle body from the side and keep the vehicle body in a stable suspended state. The flexible nature of the rubber pads can prevent the supports from scratching the bottom plate of the vehicle body.

[0024] The L-shaped support 17 is connected to the bottom rod via a clamping plate assembly. The clamping plate assembly includes an inner plate fixed to the outer side of the L-shaped support 17 and an outer plate correspondingly disposed on the outer side of the bottom rod. Bolts are installed between the two ends of the inner plate and the outer plate to tighten and fix them together. This clamping plate assembly can ensure the connection stability of the L-shaped support 17, and at the same time facilitate the adjustment of the spacing of the L-shaped support 17 to adapt to different vehicle body models.

[0025] The geared motor 31 is started to drive the swing plate 32 to rotate. The rotational swing force generated by the swing plate synchronously pulls the inner ends of the first link 33 and the second link 34 inward. The outer ends of the two links then pull the hinged supports 18 on both sides inward. The hinged supports 18 drive the rotating shaft 16 to rotate, and the chassis bracket 15 rotates accordingly. The L-shaped support 17 at the lower end swings outward and opens, creating space for the vehicle body to enter between the two chassis brackets 15. Then the geared motor 31 is started to drive the swing plate 32 to rotate in the opposite direction. The rotational swing force generated by the swing plate 32 synchronously pushes the inner ends of the first link 33 and the second link 34 outward. The outer ends of the two links then push the hinged supports 18 on both sides outward. The hinged supports drive the rotating shaft 16 to rotate, and the chassis bracket 15 rotates accordingly. The L-shaped support 17 at the lower end swings inward and enters under the chassis of the vehicle body. After the main frame 1 is raised, it lifts the vehicle body.

Claims

1. A safety protection device for preventing the free fall of a skid-type landing gear, comprising a square frame main body installed below a linear guide mechanism, characterized in that: Two anti-fall slide rails are symmetrically provided at both ends of the main frame. The length direction of the anti-fall slide rail is consistent with the conveying direction of the linear guide rail mechanism. A transverse extension rod is provided at each of the four corners of the main frame. A vertical roller is provided on the bottom surface of the extension rod, which is located directly above the anti-fall slide rail. A vertical rod is provided vertically on the bottom surface of the extension rod. A transverse roller corresponding to the side of the anti-fall slide rail is provided on the outer side of the vertical rod.

2. The safety protection device for preventing the free fall of skid-type landing gear according to claim 1, characterized in that: The main frame has two square chassis brackets symmetrically arranged at both ends. A drive mechanism is located in the middle of the main frame. The upper end of the chassis bracket is connected to the main frame through a rotating shaft. The drive mechanism is connected to the two rotating shafts respectively.

3. A safety protection device for preventing the free fall of a skid-type landing gear according to claim 2, characterized in that: The drive mechanism includes a geared motor, a first connecting rod, and a second connecting rod. A swing plate is vertically provided at the outer end of the output shaft of the geared motor. The two ends of the swing plate are respectively hinged to the inner ends of the first connecting rod and the second connecting rod. A hinge support is provided in the middle of the rotating shaft. The outer end of the first connecting rod is hinged to the hinge support on one end of the rotating shaft, and the second connecting rod is hinged to the hinge support on the other end of the rotating shaft.

4. A safety protection device for preventing the free fall of a skid-type landing gear according to claim 2, characterized in that: The chassis bracket is generally square in shape, and L-shaped supports are provided at both ends of the bottom rod of the chassis bracket. Rubber pads are provided at the ends of the L-shaped supports.

5. A safety protection device for preventing the free fall of a skid-type landing gear according to claim 4, characterized in that: The L-shaped support is connected to the bottom rod through a clamping plate assembly. The clamping plate assembly includes an inner plate fixed to the outer side of the L-shaped support and an outer plate correspondingly disposed on the outer side of the bottom rod. Bolts are installed between the two ends of the inner plate and the outer plate to tighten and fix them together.

6. A safety protection device for preventing the free fall of a skid-type landing gear according to claim 1, characterized in that: The end of the anti-fall slide rail is provided with a guide rail body that bends downward.

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