| 摘要 |
The present disclosure provides an assistant arm for an automobile tire changer and a method for manufacturing principal parts of the assistant arm. The assistant arm is of a one-for-two structure. A longitudinal actuator is connected to a sliding body, with an upper tire pressing mechanism hinged to the upper end and a lower tire pressing mechanism hinged to the lower end. A guide rail plate is arranged on a vertical column to form a combined guide rail. The guide rail plate is made of 45# bar-like steel plate, and has a straightness and a flatness of less than or equal to 0.05 mm/m. The vertical column includes a square steel tube as an anti-buckling beam, and several protrusions are welded onto upper and lower portions and a lateral surface of the vertical column to serve as a mounting reference surface with a flatness of less than or equal to 0.1 mm/m. An upper stopper, a lower stopper, a first lateral rib and a second lateral rib are welded to the sliding body within which a slider is arranged. The sliding body is connected to a piston rod of the longitudinal actuator by means of a thrust joint bearing. A lower end of the longitudinal actuator is hinged to a bottom of the vertical column through a lug shaft. Upper and lower laterally-swinging guide sleeve are each provided with a claw wrench. A console consists of a handle, a front plate welding assembly, a rear cover plate welding assembly, a tapered gasket and a sunk screw. The combined guide rail, the sliding body and the console, after being subjected to rough and fine machining, are combined together so as to form the assistant arm. |
| 主权项 |
1. An assistant arm for an automobile tire changer mounted at an operating side of a main body of the automobile tire changer, comprising a longitudinal actuator, a lateral actuator, an upper guide column, a lower guide column, an upper bead separator and a lower bead separator, wherein
the assistant arm is of a one-for-two structure, i.e., the longitudinal actuator is provided with one sliding body that slides along a guide rail plate, an upper end of the sliding body is hinged to an upper tire pressing mechanism, and a lower end of the sliding body is hinged to a lower tire pressing mechanism; the upper tire pressing mechanism consists of an upper laterally-swinging guide sleeve, the upper guide column, the upper bead separator, a first micro-motion cylinder, a first locking plate, a first return spring and an upper cylinder cover; the lower tire pressing mechanism consists of a lower laterally-swinging guide sleeve, the lower guide column, the lower bead separator, a second micro-motion cylinder, a second locking plate, a second return spring and a lower cylinder cover; the guide rail plate is combined with a vertical column, i.e., the guide rail plate is mounted on the vertical column, to form a combined guide rail which forms a moving pair together with the sliding body; the guide rail plate is a bar-like plate made of 45# steel and having a rigidity of HRC42, and a straightness and a flatness of each less than or equal to 0.05 mm/m; the vertical column comprises a square or rectangular tube as an anti-buckling beam, several small disc-shaped front protrusions are welded onto an upper portion of the vertical column, several small disc-shaped lower protrusions are welded onto a lower portion, and at lateral surfaces, of the vertical column, a machined surface of the vertical column, after being milled, forms a reference surface for mounting the guide rail plate, and the machined surface is of a flatness of less than or equal to 0.1 mm/m; the vertical column is mounted at the operating side of the main body of the automobile tire changer through an upper connection seat and a lower connection seat, and the guide rail plate is mounted on the mounting reference surface of the vertical column; the sliding body comprises a steel channel as a main member, an upper stopper, a lower stopper, a first lateral rib and a second lateral rib are welded onto the steel channel, dowel holes are provided in the middle of the steel channel, dowel grooves are arranged at upper and lower ends of the steel channel, the first lateral rib and the second lateral rib are each provided with a square convex dowel whose cross section matches with cross sections of the corresponding dowel hole and dowel groove of the steel channel, the first lateral rib is provided with a stopping dowel hole, and the upper stopper and the lower stopper are each provided with a square convex dowel whose cross section matches with a cross section of the corresponding stopping dowel hole; a slider is mounted inside the sliding body and forms a friction pair together with the guide rail plate, the sliding body is connected to a piston rod of the longitudinal actuator through a thrust joint bearing or a rod end joint bearing, and a lower end of the longitudinal actuator is hinged to a bottom of the vertical column through a lug shaft; the upper laterally-swinging guide sleeve is hinged to the upper end of the sliding body through an upper joint shaft, and the lower laterally-swinging guide sleeve is hinged to the lower end of the sliding body through a lower joint shaft; the upper laterally-swinging guide sleeve and the lower laterally-swinging guide sleeve are each provided with a claw wrench whose working surface matches with a working surface of the corresponding upper stopper or lower stopper; the upper guide column is mounted within a square hole of the upper laterally-swinging guide sleeve, a front end of the upper guide column is connected to the upper bead separator, the lower guide column is mounted within a square hole of the lower laterally-swinging guide sleeve, a front end of the lower guide column is connected to the lower bead separator, and a rear end of the lower guide column is connected to a rear bracket, the rear bracket is connected to a piston rod of the lateral actuator, the other end of the lateral actuator is connected to a front bracket, and the front bracket is arranged at a lower surface of the lower laterally-swinging guide sleeve; an upper spherical hinge plate of a spherical hinge plate push-pull flexible shaft is mounted within an upper bracket for the flexible shaft, the upper bracket for the flexible shaft is mounted at a lateral surface of the upper laterally-swinging guide sleeve, an upper core spindle of the spherical hinge plate push-pull flexible shaft is connected to the upper guide column, a lower core spindle of the spherical hinge plate push-pull flexible shaft is mounted at a lateral surface of the lower laterally-swinging guide sleeve, a lower spherical hinge plate of the spherical hinge plate push-pull flexible shaft is mounted within a lower bracket for the flexible shaft, the lower bracket for the flexible shaft is mounted at a lateral surface of the rear bracket, a rod end ball joint bearing at an upper end of the spherical hinge plate push-pull flexible shaft is connected to the upper guide column, a rod end ball joint bearing at a lower end of the spherical hinge plate push-pull flexible shaft is mounted at a lateral surface of the lower laterally-swinging guide sleeve, and the lower bracket for the flexible shaft is mounted at a lateral surface of the rear bracket; a console is hinged to a support arm, the support arm is hinged to a flange mounted at the upper portion of the vertical column; and the console consists of a handle, a front plate welding assembly, a rear cover plate welding assembly, a tapered gasket and a sunk screw. |
