Balancing device of arc workbench

Abstract

The utility model discloses a balancing device of an arc workbench, which relates to the manufacturing field of machine tools special for flap slide rail parts of airplanes and structurally comprises a gear ring, a driven gear, a gear shaft, a sector gear, a connecting shaft, a hydraulic system, a balancing oil cylinder, a support, a base, a rotating shaft and trundles. The principle of the device is that external torque is used for balancing gravity torque of the arc workbench, so that the arc workbench is stable in transmission. Feeding rotation of the arc workbench drives the gear ring to rotate together, rotation of the gear ring drives the driven gear and the gear shaft to rotate together, rotation of the gear shaft drives the sector gear to rotate together, rotation of the sector gear drives a piston rod of the balance oil cylinder to stretch out or retract, and meanwhile the balance oil cylinder moves in the guide rail direction of the base. And the hydraulic system supplies oil to the balance oil cylinder. The utility model solves the problem that the roughness of a processed part is poorer due to the fact that the arc workbench cannot feed at a constant speed, the speed is sometimes high and sometimes low, and creeping and vibration are generated when the arc workbench performs arc feeding under the action of self gravity, so that the arc workbench achieves the effect of stable movement, is high in positioning accuracy, self-adaptive and quick and sensitive in response, and is suitable for large-scale popularization and application. Maintenance is simple, and installation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machine tool manufacturing of flap slide rail parts of airplane, in particular to a machine tool circular arc worktable's balancing device which can reduce the vibration of circular arc worktable, achieve smooth motion effect, positioning precision is high, self -adaptation, reaction is quick and sensitive, maintenance is simple and is convenient for installation. BACKGROUND

[0002] Worktable is an important component of machine tool, workpiece is placed on worktable directly or through clamp in the machine tool processing, worktable drives workpiece to translate or rotate. At present, the worktable of most machine tools is flat, circular arc worktable can realize high-precision machining of large size circular arc parts for ordinary machine tools, however, for the machine tool with circular arc worktable, when the circular arc worktable feeds in circular arc, due to the gravity, the circular arc worktable cannot feed uniformly, the speed is sometimes fast and sometimes slow, crawling and vibration are produced, which leads to poor roughness of the machined parts. SUMMARY

[0003] In order to solve the above problems and improve the machining precision of parts, the utility model provides a balancing device for circular arc worktable.

[0004] A balancing device for circular arc worktable, comprising a gear ring 1, a driven gear 2, a gear shaft 3, a sector gear 4, a hydraulic system 6, a balance oil cylinder 7, a support 8, a base 9, a rotating shaft 10 and a caster 11, a gear ring 1 concentric with the circular arc worktable is screwed on the side of the machine tool circular arc worktable according to a certain speed ratio, the gear ring 1 is engaged with the driven gear 2, the driven gear 2 is mounted on the gear shaft 3, the gear shaft 3 is mounted on the support 8 through a bearing, the gear shaft 3 is engaged with the oscillating sector gear 4, the sector gear 4 is connected to the rotating shaft 10 through a key and mounted on the support 8 through a bearing, forming a balancing mechanism, the balance oil cylinder 7 is mounted with the caster 11 below, which moves along the guide rail direction of the base 9 with the rotation of the circular arc worktable.

[0005] Further, a connecting shaft 5 is screwed on the end face of the sector gear 4, the connecting shaft 5 is connected with the balance oil cylinder 7, bearings are mounted at the connecting position, the sector gear 4 is balanced by the balance oil cylinder 7, and the upper cavity of the balance oil cylinder 7 is provided with pressure oil by the hydraulic system 6.

[0006] Further, the driven gear is engaged with the gear ring, fixed on the gear shaft through a key and provided with lightening holes.

[0007] Further, the sector gear is engaged with the gear shaft, fixed on the rotating shaft through a key and can only rotate around the center line of the rotating shaft, and a connecting shaft is screwed on the end face.

[0008] Further, the balancing oil cylinder upper end mounting hole is equipped with a bearing, the bearing is equipped with a connecting shaft; the balancing oil cylinder lower end is equipped with a caster, which can move in the guide rail direction of the base; the balancing oil cylinder is connected with the hydraulic system through a hose assembly.

[0009] Further, the bracket is fixed on the base by screws, and is provided with upper and lower mounting holes, the upper hole is equipped with a gear shaft through a bearing, and the lower hole is equipped with a rotating shaft through a bearing; the base is fixed on the foundation by expansion bolts, and is provided with a guide rail.

[0010] The advantages of the device are:

[0011] The device has high working stability, high positioning accuracy, self-adaptation, rapid and sensitive response, large transmission power range, high carrying capacity, simple maintenance, long service life, and compact structure.

[0012] The device will be further described in detail below in combination with the accompanying drawings: BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a general schematic view of the balancing device;

[0014] Figure 2 is a left view of the balancing device;

[0015] Figure 3 is a schematic view of the balancing oil cylinder assembly;

[0016] Figure 4 is a hydraulic principle diagram of the hydraulic system;

[0017] Figure 5 is a schematic view of the bracket.

[0018] Numbering in the drawings: 1, gear ring; 2, driven gear; 3, gear shaft; 4, sector gear; 5, connecting shaft; 6, hydraulic system; 7, balancing oil cylinder; 8, bracket; 9, base; 10, rotating shaft; 11, caster. DETAILED DESCRIPTION

[0019] Referring to the accompanying drawings, Figure 1 and Figure 2 , a balancing device of a circular arc workbench, the structure includes a gear ring 1, a driven gear 2, a gear shaft 3, a sector gear 4, a connecting shaft 5, a hydraulic system 6 (such as Figure 4 shown), a balancing oil cylinder 7 (such as Figure 3 shown), a bracket 8 (such as Figure 5 shown), a base 9, a rotating shaft 10, a caster 11 and other accessories.

[0020] The principle of the device is to use an additional torque to balance the gravity torque of the workbench, so that the circular arc workbench transmission is stable. On the side of the machine tool circular arc workbench, a gear ring 1 concentric with the circular arc workbench is installed by screws according to a certain speed ratio relationship, a driven gear 2 meshes with the gear ring 1, the driven gear 2 is connected to the gear shaft 3 by a key to form an integral whole, the gear shaft 3 is connected to the bracket 8 by a bearing, the gear shaft 3 meshes with the oscillating sector gear 4, the sector gear 4 is connected to the rotating shaft 10 by a key and is connected to the bracket 8 by a bearing, thereby forming a balance mechanism transmission system. When the circular arc workbench rotates by a certain angle, the gear ring 1 rotates together with the circular arc workbench, driving the meshing driven gear 2 and the gear shaft 3 to rotate together around the center line of the gear shaft 3, the gear shaft 3 drives the meshing sector gear 4 to rotate together around the center line of the rotating shaft 10, and finally the sector gear 4 rotates by an angle equal to that of the circular arc workbench, that is, the torque changes. A connecting shaft 5 is installed on the end face of the sector gear 4 by screws, the connecting shaft 5 is connected to the balance oil cylinder 7, bearings are installed at the connecting position, the balance power of the sector gear 4 is derived from the balance oil cylinder 7, the upper cavity of the balance oil cylinder 7 is provided with pressure oil by the hydraulic system 6, the pressure of the pressure oil can be adjusted by a pressure reducing valve according to actual needs, and the lower cavity is connected to the oil return line and the oil tank. The balance oil cylinder 7 is provided with a truck 11 below, which can move along the guide rail of the base 9 with the rotation of the circular arc workbench. Finally, the additional torque generated by the balance oil cylinder 7 is indirectly balanced by the balance sector gear 4, so that the circular arc workbench transmission is stable.

[0021] The hydraulic system includes an oil tank, a filter, an oil pump, a motor, an overflow valve, a pressure reducing valve, a one-way valve, a pressure gauge, a pressure gauge connector, and the oil supply pressure value of the upper cavity of the balance oil cylinder can be adjusted by the pressure reducing valve.

Claims

1. A balancing device for a circular arc table, characterized by, It includes gear ring (1), driven gear (2), gear shaft (3), sector gear (4), hydraulic system (6), balance cylinder (7), support (8), base (9), rotating shaft (10), caster (11); in the lathe arc worktable side according to certain speed ratio relationship with arc worktable concentric gear ring (1) is screwed on, gear ring (1) is engaged with driven gear (2), driven gear (2) is installed on gear shaft (3), gear shaft (3) is installed on support (8) through bearing, gear shaft (3) is engaged with oscillating sector gear (4), sector gear (4) is connected through key and is installed on rotating shaft (10) and is installed on support (8) through bearing, constitutes balance mechanism, balance cylinder (7) is equipped with caster (11) below, moves along the guide rail direction of base (9) and moves along with the rotation of arc worktable.

2. A balancing device for a circular arc table according to claim 1, characterized in that, Sector gear (4) end face is equipped with connecting shaft (5) by screw, connecting shaft (5) is connected with balance cylinder (7), connecting part is equipped with bearing, sector gear (4) balance power source is derived from balance cylinder (7), balance cylinder (7) upper cavity is provided with pressure oil by hydraulic system (6).

3. The balancing device for a circular arc table according to claim 1, wherein The driven gear is engaged with the gear ring, fixed on the gear shaft by key connection and provided with lightening holes.

4. The balancing device for a circular arc table according to claim 1, wherein The sector gear is engaged with the gear shaft, fixed on the rotating shaft by key connection and can only rotate around the center line of the rotating shaft, and the connecting shaft is screwed on the end face.

5. The balancing device for a circular arc table according to claim 1, wherein The upper end of the balance cylinder is provided with a bearing, and the bearing is provided with a connecting shaft; the lower end of the balance cylinder is provided with a caster, which can move in the guide rail direction of the base; the balance cylinder is connected with the hydraulic system through a hose assembly.

6. The balancing device for a circular arc table according to claim 1, wherein The support is fixed on the base by screw, and is provided with upper and lower mounting holes; the upper hole is provided with a gear shaft through a bearing, and the lower hole is provided with a rotating shaft through a bearing; the base is fixed on the foundation by expansion bolts, and is provided with a guide rail. The support is fixed on the base by screw, and is provided with upper and lower mounting holes; the upper hole is provided with a gear shaft through a bearing, and the lower hole is provided with a rotating shaft through a bearing; the base is fixed on the foundation by expansion bolts, and is provided with a guide rail.

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