Rim clamping device and tire dismounting and mounting machine provided with same

Abstract

The invention relates to a rim clamping device, and relates to a tire dismounting and mounting machine provided with the same. The rim clamping device comprises clamping claws, an upper plate, an upper plate sliding block, a lower plate, a lower plate moving body and a cylinder, wherein arc-shaped grooves which are circumferentially and uniformly distributed are formed in the lower plate, and thelower plate moving body is mounted in the arc-shaped grooves and is connected to the upper plate sliding block through a hinge pin; one end of the cylinder is connected to the upper plate through thehinge pin, and the other end of the cylinder is connected to the lower plate through the hinge pin; when in work, the lower plate is directly driven by the cylinder to relatively rotate around the upper plate, and the lower plate moving body is driven to move in the arc-shaped grooves; the upper plate sliding block is driven to move through the lower plate moving body, and all clamping claws are driven to synchronously move close to the center of the upper plate or far away from the center of the upper plate, thus realizing the clamping of a rim. According to the device, the clamping claws have the same clamping rigidity, and the clamping claws are on the same circumference, so that the rim can be reliably clamped; the clamping capacity decreases as the decreasing of the diameter of the clamped rim, so that the rim is prevented from being damaged by excessive clamping force.

Description

technical field [0001] The invention belongs to the technical field of wheel rim clamping, and relates to a wheel rim clamping device, in particular to a device for fixing a wheel rim by clamping the inner or outer periphery of the wheel rim so as to install and disassemble automobile tires, and also relates to a device with the clamp Tire changer with tightening device. Background technique [0002] The tire changer is used to install and remove car tires, which is a necessary equipment for car repair and maintenance. Generally, a tire changer includes a machine base, a column, a rim clamping device, a rim turning device, and one or more operating tools. The rim clamping device, the rim turning device and the column are all installed on the machine base, and the operating tools are installed on the machine base or the column. The rim clamping device is a device for clamping and fixing the rim during tire dismounting. The rim rotation device is a device that rotates the r...

AI Technical Summary

Problems solved by technology

[0005] For example, since two of the four sliders are directly connected to the cylinder, the clamping jaws fastened to these two sliders have a relatively large clamping stiffness. On the contrary, the two sliders that are not directly connected to the cylinder need to use The slider directly connected to the cylinder can transmit the driving force of the cylinder through the first connecting rod, the lower plate and the second connecting rod in sequence. The clamping stiffness of the jaws fastened to the two sliders is relatively small. Different, the driving force of the cylinder cannot be evenly distributed to the four jaws

There will be problems such as the four claws are not on a circle, the hub is deformed during clamping, and the clamping is not firm.

Excessive deformation of the rim during clamping not only affects the disassembly and assembly of the tire, but also has an adverse effect on the life of the tire

In order to prevent the clamping from being weak, a larger clamping force is often required, which may pinch the rim

[0006] For example, in the above-mentioned rim clamping device, since the two sliders are directly connected to the cylinder, the driving force of the cylinder directly acts on the two sliders, thus causing clamping when clamping a large-diameter rim and clamping a small-diameter rim. The clamping force is basically the same, which may cause the problem that the clamping force is too large for small-diameter rims, but too small for large-diameter rims

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