Adjustable connecting rod mechanism

Abstract

The utility model discloses an adjustable connecting rod mechanism which comprises a connecting rod, a rotary drum, a limiting block and an attached seat. A shaft ring is arranged on the upper portion of the connecting rod, threads are arranged in the middle of the connecting rod, the rotating drum is of a tubular structure with a bottom plate at the bottom, and the threads are in threaded connection with the upper end of the rotating drum; the diameter of the collar is greater than that of the internal thread at the upper end of the drum; the axis of the connecting rod is parallel to that of the drum; a rectangular through hole is formed in the side wall of the bottom of the rotary drum, a bolt hole is formed in a bottom plate of the rotary drum, a bolt penetrates through the bolt hole to be connected with an auxiliary seat, and the auxiliary seat is located below the bottom plate of the rotary drum. The device is simple in structure, convenient to operate and high in reliability, and the length of the device can be adjusted by rotating the rotary drum; moreover, the total length is convenient to adjust, the length of the fuel tank clamp belt can be conveniently adjusted according to the actual demand condition of a vehicle, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle fuel tank support structure design, and in particular to an adjustable linkage mechanism. Background Technology

[0002] The support structure for fixing the vehicle fuel tank is a rectangular thick plate with pins and through holes. The support is usually directly welded to the inside of the vehicle deck. The support forms a hinge structure with the clamp straps through pins, cotter pins, and clamp straps. The clamp straps are fixed to the vehicle using standard parts such as bolts and washers. In the actual final assembly process of research vehicles, due to factors such as changes in the overall vehicle design, relocation of parts, machining errors of vehicle parts, and welding deformation, the length of the fuel tank clamp straps needs to be adjusted according to the actual needs of the vehicle. Usually, the method of lengthening is to re-make new clamp straps, and the method of shortening is to cut off the excess length of the clamp straps and weld the remaining clamp straps together. This results in a lot of repetitive work for vehicle assembly personnel and parts production personnel for clamp strap parts, and also increases the cost of research vehicles in the factory. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides an adjustable linkage mechanism that is simple in structure, easy to operate, and highly reliable. The total length of the linkage can be adjusted, facilitating the adjustment of the fuel tank clamp length according to the actual needs of the vehicle, thus reducing production costs.

[0004] The technical solution adopted in this utility model is:

[0005] An adjustable linkage mechanism includes a connecting rod, a rotating cylinder, a limiting block, and an attachment seat. The connecting rod has a collar at its upper part and a thread in its middle. The rotating cylinder is a tubular structure with a base plate at its bottom, and the thread is screwed to the upper end of the rotating cylinder. The diameter of the collar is larger than the diameter of the internal thread at the upper end of the rotating cylinder. The axis of the connecting rod is parallel to the axis of the rotating cylinder. The bottom sidewall of the rotating cylinder has a rectangular through hole, and the base plate of the rotating cylinder has bolt holes. Bolts pass through the bolt holes and connect to the attachment seat, which is located below the base plate of the rotating cylinder.

[0006] Furthermore, the rotating drum sidewall is provided with multiple long straight holes, the length direction of which is the axis direction of the rotating drum; the bottom sidewall of the connecting rod is provided with an arc-shaped groove, and a limiting block is embedded in the arc-shaped groove, the limiting block being an arc-shaped strip structure.

[0007] Furthermore, a scale is provided along the axial direction on the side wall of the rotating drum near a long straight hole.

[0008] Furthermore, a rubber pad is provided on each of the two ends of the arc-shaped groove.

[0009] Furthermore, a hinge hole is provided at the upper end of the connecting rod, and the axis of the hinge hole is set along the diameter of the connecting rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model has a simple structure, and its length can be adjusted by rotating the drum. It is easy to operate and highly reliable. Moreover, this utility model facilitates the adjustment of the total length, making it easier to adjust the length of the fuel tank clamp band according to the actual needs of the vehicle, thus reducing production costs. Attached Figure Description

[0012] Figure 1 This is the front view of this utility model.

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] Figure 3 This is a perspective view of the connecting rod of this utility model.

[0015] Figure 4 This is a perspective view of the rotating drum of this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figure 1-4 As shown, this utility model includes a connecting rod 1, a rotating cylinder 2, a limiting block 9, and an attachment 7. A hinge hole 10 is provided at the connecting rod 1, with the axis of the hinge hole 10 aligned with the diameter of the connecting rod 1. A collar 11 is provided at the upper part of the connecting rod 1, located below the hinge hole 10. A thread is provided in the middle of the connecting rod 1. The rotating cylinder 2 is a tubular structure with a base plate at the bottom. The thread of the connecting rod 1 is screwed to the upper end of the rotating cylinder 2. The diameter of the collar 11 is larger than the diameter of the internal thread at the upper end of the rotating cylinder 2; the axis of the connecting rod 1 is parallel to the axis of the rotating cylinder 2. A rectangular through hole 15 is provided on the bottom side wall of the rotating cylinder 2. A bolt hole 14 is provided at the center of the base plate of the rotating cylinder 2. A bolt 4 passes through the bolt hole 14 and connects to the attachment 7, which is located below the base plate of the rotating cylinder 2. A flat washer 6 and a spring washer 5 are provided between the bolt head of the bolt 4 and the base plate of the rotating cylinder 2, with the flat washer 6 located between the spring washer 5 and the base plate of the rotating cylinder 2.

[0018] The rotating drum 2 has multiple elongated straight holes 13 on its side wall, with the length of the holes 13 aligned with the axis of the rotating drum 2. Near one of the elongated straight holes, a scale 3 is provided along the axis of the rotating drum 2's side wall. The bottom side wall of the connecting rod 1 has an arc-shaped groove 12, with a rubber pad 8 on each end face of the groove. A limiting block 9 is located within the groove, and the limiting block 9 is an arc-shaped strip structure. The limiting block 9 can be engaged with the inner wall of the rotating drum 2 to limit the extension stroke of the connecting rod 1.

[0019] The working principle of this utility model is as follows:

[0020] When the rotating drum 2 rotates, a pair of meshing threads exist between the rotating drum 2 and the connecting rod 1, and the upper end of the connecting rod 1 is connected to the vehicle's fuel tank via a pin or other parts (i.e., the rotational freedom of the connecting rod around its axis is restricted). This converts the rotational motion of the rotating drum 2 around its center into the linear motion of the connecting rod 1 within the inner cavity of the rotating drum 2, thereby achieving the function of adjusting the extension amount of the connecting rod 1 within the inner cavity of the rotating drum 2. The limiting block embedded in the bottom groove on the outer side of the connecting rod 1 protrudes from the side surface of the connecting rod 1 under the elastic action of the rubber pad 8, causing the limiting block 9 to fit against the inner wall of the rotating drum 2. Furthermore, the diameter of the collar 11 at the top outer side of the connecting rod 1 is larger than the inner diameter of the internal thread at the upper end of the rotating drum 2. This means that when the connecting rod 1 makes a linear motion within the rotating drum 2, its stroke is restricted by the collar 11 and the limiting block 9.

[0021] When the length of the clamp band needs to be adjusted on the vehicle, first use a wrench to loosen the bolt 4 that is pressing against the rotating drum 2 by passing it through the rectangular through hole 15 at the bottom of the outer side of the rotating drum 2. Then, according to the actual assembly requirements, rotate the rotating drum to adjust the extension and retraction of the connecting rod 1 inside the rotating drum 2. After the adjustment is completed, use a wrench to tighten the bolt 4 that is pressing against the rotating drum by passing it through the rectangular through hole 13 at the middle of the outer side of the rotating drum 2 and the scale line 3. Record the specific adjustment dimension of the clamp band length through the rectangular through hole 13 at the middle of the outer side of the rotating drum 2 and the scale line 3. Apply this dimension to the next stage of the vehicle product.

Claims

1. An adjustable linkage mechanism, characterized in that: It includes a connecting rod, a rotating cylinder, a limiting block, and an attachment seat; the upper part of the connecting rod is provided with a collar, and the middle part of the connecting rod is provided with a thread; the rotating cylinder is a tubular structure with a bottom plate, and the thread is screwed to the upper end of the rotating cylinder; the diameter of the collar is larger than the diameter of the internal thread at the upper end of the rotating cylinder; the axis of the connecting rod is parallel to the axis of the rotating cylinder; the bottom side wall of the rotating cylinder is provided with a rectangular through hole, and the bottom plate of the rotating cylinder is provided with a bolt hole, through which the bolt passes and connects to the attachment seat, and the attachment seat is located below the bottom plate of the rotating cylinder.

2. The adjustable linkage mechanism according to claim 1, characterized in that: The rotating drum has multiple long straight holes on its side wall, with the length of the long straight holes pointing in the direction of the axis of the rotating drum; the connecting rod has an arc-shaped groove on its bottom side wall, with a limiting block embedded in the arc-shaped groove, and the limiting block has an arc-shaped strip structure.

3. The adjustable linkage mechanism according to claim 2, characterized in that: The rotating drum has graduations along its axis near a long straight hole on its side wall.

4. The adjustable linkage mechanism according to claim 2, characterized in that: A rubber pad is provided on each of the two ends of the arc-shaped groove.

5. The adjustable linkage mechanism according to claim 1, characterized in that: A hinge hole is provided at the upper end of the connecting rod, and the axis of the hinge hole is set along the diameter of the connecting rod.

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