Slidable platform mounting and fixing structure

Abstract

The utility model relates to a slidable platform mounting and fixing structure, which avoids failure forms such as fatigue fracture, open welding, even tearing and the like caused by repeated stress of a fixed structure platform. Comprising a platform, a fixing support, a rubber damping block, a first gasket, a spacer bush, a fastening bolt, a locking nut and a second gasket, the rubber damping block, the platform and the fixing support are sequentially arranged on the spacer bush in a sleeving mode through center holes, the fastening bolt penetrates through the center hole of the spacer bush, and the first gasket is installed between the fastening bolt and the rubber damping block in a pressed mode; holes for installing the spacer bush on the platform and the fixing support are oblong holes, the long axis directions of the platform and the fixing support are perpendicular to each other, the spacer bush is of a cylinder sleeve structure, a large cylinder at the upper end of the spacer bush is located in the rubber damping block, and a small cylinder is located in the oblong holes of the platform and the fixing support. The diameter of the spacer bush is matched with the distance between the platform and the short shaft of the fixing support, and when the fastening bolt and the locking nut are pressed, a certain pre-tightening gap can be provided between the large cylinder of the spacer bush and the upper end face of the platform.

Description

Technical Field

[0001] The utility model relates to a fixing structure, in particular to a slidable platform installation fixing structure. Background Art

[0002] The work platform on a heavy-duty vehicle is typically located behind the cab. Four-point mounting is often used. The work platform is typically mounted on the upper wing surface of the vehicle frame, secured and held in place by an L-shaped clamp. However, if the work platform exceeds the limits of the L-shaped clamp due to operational requirements or structural limitations, this type of structure cannot be used. The greater the height of the work platform above the upper wing surface, the greater the torsional deformation of the vehicle during driving. Changes in the relative position of the platform's mounting points can cause tension on the platform, leading to fatigue fractures and consequent functional failure. Utility Model Content

[0003] The utility model provides a structure that can release the strain of the fixed position of the platform, offset the relative displacement deformation of the fixed point of the platform, and avoid the platform being subjected to repeated stress, resulting in failure forms such as fatigue fracture, open welding and even tearing.

[0004] The utility model is realized by the following technical solutions:

[0005] A sliding platform installation and fixing structure includes a platform 1, a fixed bracket 2, a rubber shock-absorbing block 3, a washer 4, a spacer 5, a fastening bolt 6, a locking nut 7 and a washer 2 8. The rubber shock-absorbing block 3, the platform 1 and the fixed bracket 2 are sequentially mounted on the spacer 5 through the center hole, the fastening bolt 6 passes through the center hole of the spacer 5, the washer 1 4 is pressed between the fastening bolt 6 and the rubber shock-absorbing block 3, and the locking nut 7 presses the washer 2 8 onto the bottom end of the fixed bracket 2. The holes for installing the spacer 5 on the platform 1 and the fixed bracket 2 are both oblong holes, and the long axis directions of the two are perpendicular to each other. The spacer 5 is a cylinder sleeve structure, the large cylinder at the upper end is located in the rubber shock-absorbing block 3, and the small cylindrical part is located in the oblong holes of the platform 1 and the fixed bracket 2, and the diameter is matched with the short axis distance of the platform 1 and the fixed bracket 2. When the fastening bolt 6 and the locking nut 7 are tightened, the large cylinder of the spacer 5 and the upper end face of the platform 1 can provide a certain pre-tightening gap 9.

[0006] Washer 1 (4) is press-fitted into the circular groove at the center of the rubber shock-absorbing block (3).

[0007] The structure of the utility model can effectively prevent the stress and strain generated by the frame torsion of the heavy vehicle from being transferred to the platform, resulting in failure modes such as fatigue fracture, open welding and even tearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a cross-sectional view of the slidable fixing structure of the utility model;

[0009] Figure 2This is a top view of the slidable assembly of the utility model;

[0010] Figure 3 This is an exploded view of the assembly of the utility model;

[0011] Figure 4 This is the assembly and application diagram of the utility model;

[0012] Among them, 1. platform 2. fixed bracket 3. rubber or other non-metallic shock-absorbing blocks 4. washer 1 5. spacer 6. fastening bolts 7. locking nut 8. washer 2 9. pre-tightening gap 10. long axis direction of fixed bracket 11. long axis direction of platform adjustment 12. sliding fixed structure 13. fastening fixed structure. DETAILED DESCRIPTION

[0013] like Figure 1-4 As shown, the present invention is a slidable mounting and fixing structure, which mainly consists of a platform 1, a fixing bracket 2, a rubber shock-absorbing block 3, a washer 4, a spacer 5, a fastening bolt 6, a locking nut 7, and a washer 8. The slidable mounting and fixing structure is used in conjunction with a non-slidable fixing structure to achieve the characteristics of platform position fixation and strain relief.

[0014] Platform 1 is the platform that needs to be fixed. Its fixed structure in this case is an oblong hole structure, which allows the platform to slide in the long axis direction of the oblong hole.

[0015] The fixing bracket 2 is a fixing bracket for fixing the platform 1. It also has an oblong hole in the opening structure, and its long axis direction is perpendicular to the long axis direction of the platform 1, so that the platform 1 and the fixing bracket 2 can slide in the long axis direction.

[0016] The rubber damping block 3 is made of non-metal damping materials such as rubber, and can produce a certain degree of deformation to play a role in damping and reducing vibration and noise.

[0017] Washer 1 4 and washer 2 8 adopt a large washer structure, and their main function is to compress the rubber shock-absorbing block 3 and cooperate with the oblong hole and the bolt and nut to tighten.

[0018] The spacer 5 is a cylinder sleeve. Its large cylindrical end secures the rubber damper 3, while the small outer cylindrical end guides the platform 1 and the oblong holes of the fixed bracket 2. The inner hole is for the bolts to pass through. By adjusting the height of the two cylindrical ends, a certain preload clearance 9 is maintained when the fastening bolt 6 and the lock nut 7 are tightened.

[0019] The pre-tightening gap 9 is the core dimension of this structure, which requires that when the bolt is tightened, it can satisfy the spacer 5 to continue sliding in the oblong hole without crushing the rubber shock-absorbing block 3.

[0020] Through actual vehicle assembly, when the platform used a fastening structure 13 at all fixed locations, the bracket broke after driving 100 kilometers on the test road. After reinforcing the broken location, the fracture and weld separation occurred again after driving nearly 200 kilometers.

[0021] Through on-site analysis, after arranging the slidable fixed structure 12 at fixed positions where relative displacement occurs between fixed points, the vehicle travels 5,000 km without any breakage or welding, indicating that the structure is reliable.

[0022] The utility model has the following beneficial effects:

[0023] 1. Avoid damage to the platform by changing the connection structure between the platform and the platform fixing bracket.

[0024] 2. This structure (slidable fixed structure) is used in conjunction with the fastened fixed structure to effectively fix the platform position and prevent the platform from being affected by harmful stress.

[0025] 3. Simple structure, reliable connection, shock absorption and noise reduction.

[0026] The solution of the utility model can offset the relative displacement between the fixed points of the fixed platform, ensure that the platform is not affected by the stress and deformation from the fixed points, and avoid the platform being subjected to repeated stress, resulting in failure forms such as fatigue fracture, open welding and even tearing.

Claims

1. A slidable platform installation and fixing structure, characterized by: The locking nut presses the washer 2 onto the bottom end of the fixed bracket. The holes for installing the spacers on the platform and the fixed bracket are both oblong holes, and the long axes of the two are perpendicular to each other. The spacer is a cylinder sleeve structure, and the large cylinder at the upper end is located in the rubber shock-absorbing block, and the small cylindrical part is located in the oblong holes of the platform and the fixed bracket. The diameter matches the short axis distance of the platform and the fixed bracket. When the fastening bolts and the locking nut are tightened, the large cylinder of the spacer and the end face of the platform can provide a certain pre-tightening gap.

2. The slidable platform installation and fixing structure according to claim 1, characterized in that: The washer is pressed into the circular groove in the center of the rubber shock-absorbing block.

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