Synchronous universal wheel mechanism and mounting structure thereof

Abstract

The utility model relates to a synchronous universal wheel mechanism which comprises a pair of symmetrically-arranged wheel seats and a synchronous rod connected with the wheel seats, the synchronous rod and the wheel seats are of a rigid integrated structure, universal wheels are installed at the bottoms of the wheel seats, and an installation space for installing a driving wheel installation seat is formed between the wheel seats. The synchronous rod and the rear side fixing block are located on the rear side of the installation space, the synchronous rod is installed on the rear side fixing block and can rotate up and down relative to the rear side fixing block, and the rear side fixing block is provided with an installation hole used for being fixed to a driving wheel installation base or a vehicle frame; and after the wheel seat is mounted in place, the pressure spring is positioned on an up-and-down rotating path of the wheel seat, and the telescopic axis of the pressure spring is perpendicular to the rotating axial direction of the synchronous rod. The utility model further relates to an installation structure of the synchronous universal wheel mechanism. The structure has the advantages of being compact in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of transport vehicles, in particular to a synchronous universal wheel mechanism on a transport vehicle and a mounting structure thereof. Background Art

[0002] The Chinese utility model patent with publication number CN 205131373U discloses a synchronous universal wheel mechanism, including a mounting seat and wheel seats arranged in pairs, the wheel seats are fixed on the mounting seat, universal wheels are installed at the bottom of the wheel seats, and a synchronization rod is also included, and the two ends of the synchronization rod are respectively fixed on the wheel seats arranged in correspondence with each other. A wheel load adjustment device is provided on the wheel seat, and the wheel load adjustment device includes a hollow threaded shaft arranged on the mounting seat and arranged longitudinally, a screw passing through the hollow threaded shaft is provided in the hollow threaded shaft, a buffer sleeve is sleeved on the screw and located below the hollow threaded shaft, the screw passes through the hollow threaded shaft and the buffer sleeve in turn, and the end of the screw is fixed on the wheel seat through a nut. The buffer sleeve is an elastic material. When the screw applies force to the hollow threaded shaft and the hollow threaded shaft applies force to the buffer sleeve, the buffer sleeve will be elastically deformed, so that the height of the entire wheel load adjustment device is reduced, and then the height of the entire wheel seat is reduced, thereby increasing the pressure between the universal wheel and the ground to increase the load of the universal wheel, so as to achieve the universal wheel to share the load of the vehicle body drive wheel.

[0003] The transport truck works in the application scenario of frequent vibration and has a large load-bearing range. Under frequent vibration, the buffer structure needs to respond quickly, rebound quickly, and expand and contract over a large range. The above-mentioned synchronous universal wheel mechanism disclosed can realize the floating self-adjustment function of the universal wheel through the buffer sleeve. However, the above-mentioned mechanism is used for stacking trucks, which uses the buffer sleeve as the buffer material of the buffer universal wheel. However, the buffer pad of the polyurethane material cannot realize rapid rebound and large-range compression, and is not suitable for the application scenario of the transport truck.

[0004] In addition, the wheel seat of the above-mentioned synchronous universal wheel mechanism is fixed on the mounting seat, so when the whole vehicle is installed, the mounting seat needs to be fixed to the frame and then the vehicle shell is installed. When disassembling and repairing, the synchronous universal wheel mechanism needs to be disassembled as a whole after the shell is removed, and the loading and unloading structure is relatively complicated. Summary of the invention

[0005] In order to solve the above problems, the purpose of the utility model is to provide a synchronous universal wheel mechanism and an installation structure thereof.

[0006] A synchronous universal wheel mechanism comprises a pair of symmetrically arranged wheel seats and a synchronous rod connecting the pair of wheel seats, the synchronous rod and the wheel seats are in a rigid integrated structure, a universal wheel is installed at the bottom of the wheel seat, an installation space for a drive wheel mounting seat to be installed is formed between the wheel seats, the synchronous rod and the rear side fixing block are located at the rear side of the installation space, the synchronous rod is installed on the rear side fixing block and can rotate up and down relative to the rear side fixing block, the rear side fixing block is provided with a mounting hole for fixing to the drive wheel mounting seat or a frame; and also includes a compression spring, after the wheel seat is installed in place, the compression spring is located on the up and down rotation path of the wheel seat, and the telescopic axis of the compression spring is perpendicular to the rotation axis of the synchronization rod.

[0007] It comprises a compression spring mounting plate, which is fixed on a driving wheel mounting seat. The compression spring mounting plate provides an upper limit for the compression spring, and the wheel seat provides a lower limit for the compression spring.

[0008] Preferably, the compression spring mounting plate includes a fixing seat, and the compression spring provides an upper limit position through the fixing seat. The fixing seat is fixed to the adjusting screw and is driven to adjust up and down through the adjusting screw.

[0009] Preferably, the left and right ends of the synchronization rod are its connecting ends, the synchronization rod is hinged to the rear fixed block at the connecting end, and the wheel seat is fixed to the connecting end of the synchronization rod; the connecting end of the synchronization rod is arranged along the rotation axis of the synchronization rod, and the rest of the synchronization rod is arranged toward the synchronization rod mounting seat.

[0010] Preferably, the rear end of the wheel seat is fixed to the synchronization rod, and one end of the wheel seat on which the universal wheel is mounted is lifted upward relative to the connection point between the wheel seat and the synchronization rod.

[0011] Preferably, both ends of the synchronization rod are respectively mounted on the rear fixing block through bearing bushes.

[0012] The utility model also provides an installation structure of a synchronous universal wheel mechanism, comprising a frame and a driving wheel mounting seat, wherein the driving wheel mounting seat is fixed to the frame, and the driving wheel is mounted on the driving wheel mounting seat. It also includes a synchronous universal wheel mechanism as described in any of the above items, wherein a mounting groove opening backwards is provided on the rear side of the frame, and the synchronous universal wheel mechanism is installed into the mounting groove from the opening.

[0013] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0014] 1. The wheel seat, synchronization rod and rear fixing block are an integrated structure, which realizes modular installation. During installation, the integrated structure can be assembled into the frame from the rear side, and the installation structure is simple;

[0015] 2. The synchronization rod is used to rigidly connect with the wheel seats at both ends to realize the synchronous movement of the universal wheels on both sides of the driving wheel. On the other hand, the synchronization rod directly serves as the rotation axis of the wheel seat, and there is no need to set up a rotation connection structure of the wheel seat relative to the frame, which has a simple structure.

[0016] 3. The compression spring is used as a buffer, which can achieve quick response, quick rebound and large-range expansion and contraction, and is suitable for application scenarios with frequent vibrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the synchronous universal wheel mechanism (the compression spring and the compression spring mounting plate are not shown);

[0018] Figure 2 It is a schematic diagram of the assembly position of the synchronous universal wheel mechanism and the drive wheel mounting seat;

[0019] Figure 3 for Figure 2 Schematic diagram from another angle.

[0020] Reference numerals:

[0021] Wheel seat 1, synchronization rod 2, rear side fixing block 3, bearing bush 31, universal wheel 4, driving wheel mounting seat 5, compression spring 6, compression spring mounting plate 7. DETAILED DESCRIPTION

[0022] The embodiments of the present utility model are described in detail below.

[0023] Embodiment 1:

[0024] This embodiment provides a synchronous universal wheel mechanism. Figure 1-3 As shown, the synchronous universal wheel mechanism includes a pair of symmetrically arranged wheel seats 1 and a synchronous rod 2 connecting the pair of wheel seats 1, the synchronous rod 2 and the wheel seat 1 are in a rigid integrated structure, a universal wheel 4 is installed at the bottom of the wheel seat 1, and an installation space for the drive wheel mounting seat 5 to be installed is formed between the wheel seats 1, the synchronous rod 2 and the rear side fixing block 3 are located at the rear side of the installation space, the synchronous rod 2 is installed on the rear side fixing block 3 and can rotate up and down relative to the rear side fixing block 3, and the rear side fixing block 3 is provided with a mounting hole for fixing to the drive wheel mounting seat 5 or the frame; it also includes a compression spring 6, after the wheel seat 1 is installed in place, the compression spring 6 is located on the up and down rotation path of the wheel seat 1, and the telescopic axis of the compression spring 6 is perpendicular to the rotation axis of the synchronization rod 2.

[0025] According to the above arrangement, the synchronization rod 2, the wheel seat 1 and the rear fixing block 3 form an installation module independent of the driving wheel seat 1. The rigid integrated structure of the synchronization wheel and the wheel seat 1 can rotate up and down relative to the rear fixing block 3. The rear fixing block 3 is used to connect the synchronization universal wheel mechanism with other parts of the frame, so that the above-mentioned integrated structure can be assembled into the frame from the rear side during installation, which is conducive to realizing modular installation of the frame, simplifying the installation steps and improving installation efficiency.

[0026] The compression spring 6 is arranged on the up and down floating path of the wheel seat 1, and the expansion and contraction axis of the compression spring 6 is perpendicular to the rotation axis of the synchronization rod 2. In this way, the vibration of the universal wheel 4 on the driving road surface can be buffered by the compression spring 6. The compression spring 6 has the advantages of fast response, fast rebound and wide range of expansion and contraction, and is suitable for working scenes where the transport vehicle vibrates frequently.

[0027] As an optional arrangement of the compression spring 6, Figure 3 As shown, it includes a compression spring mounting plate 7, the compression spring mounting plate 7 is fixed on the driving wheel mounting seat 5, the compression spring mounting plate 7 provides an upper limit for the compression spring 6, and the wheel seat 1 provides a lower limit for the compression spring 6. According to the above arrangement, the compression spring 6 is fixed to the driving wheel mounting seat 5 through the compression spring mounting plate 7. In this arrangement, when the synchronous universal wheel mechanism is installed into the frame, the installation will not be hindered by the arrangement of the compression spring 6. In another embodiment, the compression spring 6 can also be arranged in a manner similar to the wheel load adjustment device of CN 205131373U.

[0028] Preferably, the compression spring mounting plate 7 includes a fixing seat, and the compression spring 6 is provided with an upper limit position through the fixing seat. The fixing seat is fixed to the adjusting screw and is driven up and down by the adjusting screw. The preload force of the compression spring 6 can be adjusted by the adjusting screw to meet the needs of transport vehicles with different loads. As a further preference, the compression spring 6 is sleeved on a guide shaft and is telescopically guided by the guide shaft. Optionally, the adjusting screw extends downward as a guide shaft for the compression spring 6.

[0029] In this embodiment, the two ends of the synchronization rod 2 are respectively installed on the rear side fixing block 3 through the bearing 31, and the installation structure is compact. The left and right ends of the synchronization rod 2 are its connecting ends, and the synchronization rod 2 is hinged to the rear side fixing block 3 at the connecting end, and the wheel seat 1 is fixed to the connecting end of the synchronization rod 2; the connecting end of the synchronization rod 2 is arranged along the rotation axis of the synchronization rod 2, and the remaining part of the synchronization rod 2 is arranged toward the synchronization rod 2 mounting seat, and the synchronization rod 2 as a whole can be shielded by the rear side fixing block 3, and the synchronization rod 2 occupies a small space. In addition, the rear end of the wheel seat 1 is fixed to the synchronization rod 2, and one end of the wheel seat 1 on which the universal wheel 4 is installed is lifted upward relative to the connection point between the wheel seat 1 and the synchronization rod 2. Through the above arrangement, the installation structure of the universal wheel 4 and the wheel seat 1 is compact, and can provide a larger up and down floating stroke of the wheel seat 1 within a limited range, and the structure is compact.

[0030] Embodiment 2:

[0031] This embodiment provides an installation structure of a synchronous universal wheel mechanism in an embodiment. It includes a frame and a driving wheel mounting seat 5, the driving wheel mounting seat 5 is fixed on the frame, the driving wheel is mounted on the driving wheel mounting seat 5, and the rear side of the frame is provided with a mounting groove opening to the rear, and the synchronous universal wheel mechanism is installed into the mounting groove from the opening. The structure of the frame in this embodiment is the same as the conventional frame structure, but the installation method of the synchronous universal wheel mechanism is changed, because the synchronous universal wheel mechanism is installed from the rear side, which is convenient for assembly. During installation, the compression spring 6 can be first fixed to the driving wheel mounting seat 5 through the compression spring 6 mounting plate, and then the wheel seat 1, the synchronization rod 2, and the rear side fixing block 3 can be installed as a whole, which can realize modular installation, convenient assembly and convenient for subsequent maintenance.

[0032] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A synchronous universal wheel mechanism, comprising a pair of symmetrically arranged wheel seats and a synchronous rod connecting the pair of wheel seats, wherein the synchronous rod and the wheel seats are rigidly integrated, and a universal wheel is installed at the bottom of the wheel seat, characterized in that: An installation space is formed between the wheel seats for the drive wheel mounting seat to be installed, and the synchronization rod and the rear fixing block are located on the rear side of the installation space. The synchronization rod is installed on the rear fixing block and can rotate up and down relative to the rear fixing block. The rear fixing block is provided with a mounting hole for fixing to the drive wheel mounting seat or the frame; it also includes a compression spring. After the wheel seat is installed in place, the compression spring is located on the up and down rotation path of the wheel seat, and the telescopic axis of the compression spring is perpendicular to the rotation axis of the synchronization rod.

2. A synchronous universal wheel mechanism according to claim 1, characterized in that: It comprises a compression spring mounting plate, which is fixed on a driving wheel mounting seat. The compression spring mounting plate provides an upper limit for the compression spring, and the wheel seat provides a lower limit for the compression spring.

3. A synchronous universal wheel mechanism according to claim 2, characterized in that: The compression spring mounting plate comprises a fixing seat, through which the compression spring provides an upper limit position, and the fixing seat is fixed to the adjusting screw and driven to adjust up and down through the adjusting screw.

4. A synchronous universal wheel mechanism according to claim 1, characterized in that: The left and right ends of the synchronization rod are its connecting ends, the synchronization rod is hinged to the rear side fixing block at the connecting end, and the wheel seat is fixed to the connecting end of the synchronization rod; the connecting end of the synchronization rod is arranged along the rotation axis of the synchronization rod, and the rest of the synchronization rod is arranged toward the synchronization rod mounting seat.

5. The synchronous universal wheel mechanism according to claim 1, characterized in that: The rear end of the wheel seat is fixed to the synchronization rod, and one end of the wheel seat on which the universal wheel is mounted is lifted upward relative to the connection point between the wheel seat and the synchronization rod.

6. A synchronous universal wheel mechanism according to claim 1, characterized in that: The two ends of the synchronization rod are respectively mounted on the rear side fixing block through bearing bushes.

7. A mounting structure of a synchronous universal wheel mechanism, comprising a vehicle frame and a drive wheel mounting seat, wherein the drive wheel mounting seat is fixed to the vehicle frame and the drive wheel is mounted on the drive wheel mounting seat, characterized in that: It comprises a synchronous universal wheel mechanism as claimed in any one of claims 1 to 6, wherein a mounting groove opening backwards is provided on the rear side of the frame, and the synchronous universal wheel mechanism is installed into the mounting groove from the opening.

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