Reciprocating drive mechanism of abrasive band grinding machine

The present invention provides a reciprocating lifting motion of abrasive band grinding machine, wherein two control boxes are arranged correspondingly at lower part of the grinding mechanism of the grinding machine; the grinding mechanism is driven by the drive axle of the control box; a motor is coupled below the control box, and the control box is provided with a lifting mechanism, which is adapted with the cam via a main drive axle with worm gear; based on the eccentric rotation characteristic of the cam, the main drive axle could generate reciprocating lifting motion, driving the continuous operation of the grinding mechanism for uniform grinding of the abrasive band surface.

BACKGROUND OF INVENTION

(1) Field of the Invention

The present invention relates generally to a reciprocating lifting mechanism mounted onto the grinding machine, and more particularly to an innovative one which allows the abrasive band grinding machine to generate continuous lifting motion so as to grind uniformly the abrasive band and prolong efficiently its life span.

(2) Description of the Prior Art

A conventional abrasive band grinding machine is generally driven by a motor to conduct the grinding operation through continuously rotating abrasive band. However, the following shortcomings are observed during actual applications:

1) Since the abrasive band of fixed grinding height has a higher frequency of utilization and contact, some saw dusts are inclined to be accumulated on the surface of the abrasive band. This will affect the heat dispersion of abrasive band surface, and possibly lead to its wear and rupture under continuous operating state.

2) Excessive accumulation of saw dusts on the abrasive band will also affect the grinding capacity, leading to non-uniform grinding of the surface of workpieces.

3) The operator has to clean up regularly the surface of abrasive band for maintaining the efficiency, but this will bring about inconvenience and delay of operation.

4) The surface of abrasive band isn't fully utilized, but the abrasive band will be replaced if some sections of higher utilization frequency are damaged, leading to waste of materials and more burden of cost.

SUMMARY OF THE INVENTION

For the reasons mentioned above, the major purpose of the present invention is to install two control boxes at lower part of the grinding machine, and allow a lifting mechanism within the control box to control the reciprocating motion of the grinding machine, thereby achieving uniform grinding of the surface of abrasive band.

Another purpose of the present invention is to reduce efficiently the wear of fixed section on the abrasive band, and prolong the life span of the abrasive band.

The other purpose of the present invention is to generate multi-directional grinding of the workpieces via reciprocating motion of the lifting mechanism, thus yielding better grinding effect and reducing the saw dusts on the abrasive band for improved heat dispersion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The features and the advantages of the present invention will be more readily understood with reference to the accompanying drawings.

Referring firstly to FIG.1—schematic view of abrasive band grinding machine of the present invention, and FIG.2—an assembled view of the present invention, wherein two control boxes20are arranged correspondingly at lower part of the grinding mechanism11of the grinding machine10; the grinding mechanism11is driven by the drive axle36of the control box20, while a motor40is coupled below the control box20; an abrasive band13is mounted onto the grinding mechanism11, and a worktable14for placement of articles is arranged at one side of the grinding mechanism11.

Referring also toFIG. 3, an exploded view of the present invention, wherein a lifting mechanism30is placed within the control box20; the lifting mechanism30comprises: a main drive axle35with a worm gear351, which is connected with mandrel41of the motor40; a balancing seat31is screwed on the main drive axle35; a cam34and a fixed frame32are arranged at one side of the balancing seat31, and a hole39placed on the other side; the cam34is coupled with the worm gear351of the main drive axle35in a rotary state; in addition, the fixed frame32is secured at lower part of the upper cover21of the control box20, while a balancing rod33is installed at the other side of the lower part of the upper cover21, and also aligned with the hole39of the balancing seat31.

Moreover, the main drive axle35is connected with a drive axle36protruded from the control box20; the drive axle36is connected with the abrasive band wheel12on the upper part of the grinding mechanism11; a gear37is sleeved onto the drive axle36, and a drive belt38is used to connect gear37protruded from the control box30, so that both lifting mechanisms30could generate simultaneously reciprocating lifting motion.

Referring to FIGS.4˜5—relational view of the lifting mechanism, wherein the cam34is connected with the worm gear351of main drive axle35in a rotary state; based on the eccentric rotating structure of the cam34and fixed frame32, the main drive axle35could rotated in a single direction to generate reciprocating lifting motion under the drive of the cam34.

Referring also to FIGS.6˜7—lifting view of the present invention, wherein the grinding mechanism11generates continuous lifting motion via the lifting mechanism30, such that the surface of the abrasive band13could be smoothed uniformly with declining accumulation of sawdust.