CN201128011Y - Main spindle box lifting mechanism of square column vertical drilling machine - Google Patents

Abstract

The utility model relates to a drilling machine especially relates to a square column upright drill headstock elevating system. The automatic spindle changing device comprises a motor 7 and a screw rod 3, wherein the motor 7 is arranged on a motor base 6 in a drilling machine body 11 in an inverted mode and is connected with the screw rod 3 through a driving belt pulley 4 and a driven belt pulley 5, the screw rod 3 is parallel to a drilling machine column guide rail 23, an upper bearing assembly 1 and a lower bearing assembly 8 are arranged at the upper end and the lower end of the screw rod 3, which is connected with the column guide rail 23, a safety nut assembly 2 is sleeved on the screw rod 3 in a threaded mode, and the safety nut assembly 2 is fixedly connected. The motor 7 is adopted to drive the belt pulley to enable the threaded screw rod 3 to rotate, and the unique design of the connection structure among the main nut 18, the auxiliary nut 14 and the gland 15 of the safety nut component 2 enables the square column upright drilling machine to be safer, more convenient and more labor-saving to use, and the whole machine body is more attractive in appearance.

Description

Square column vertical drilling machine headstock lifting mechanism

technical field

The utility model relates to a drilling machine, in particular to a spindle box lifting mechanism of a square column vertical drilling machine.

Background technique

There are currently two popular mechanisms for the spindle box lifting mechanism of the square column vertical drilling machine: one is the manual lifting mechanism commonly used in China; the other is the motorized lifting mechanism commonly used abroad. The main principle of the manual lifting mechanism is to fix the rack on the column, and a gear (meshing with the rack) and a worm gear pair are installed at the rear of the headstock, and the handle is used to shake the worm drive worm and its coaxial gear to drive the headstock along the guide rail of the column. Lifting; the main principle of the motorized lifting mechanism is to install a motor and a gear reducer on the top of the column to drive the screw to the screw, and the nut is fixed at the rear of the headstock, and the screw drives the headstock to lift through the nut after the screw rotates.

Compared with the motorized lifting mechanism, the manual lifting mechanism has a simpler structure, but it is labor-intensive and time-consuming to operate by manpower. The handle force is greater than 10kg, and the lifting speed is slow. Especially after rising to a certain height, the operation is more difficult and labor-intensive.

The motorized lifting mechanism solves the problem of high labor intensity very well, but the structure is relatively complicated, and there must be torque insurance joints, lubrication measures and anti-leakage measures, and its appearance is also poor, especially when the height of the machine tool increases. With difficulty, in order to reduce the height of the packing box, the motor must be removed and reinstalled after being transported to the user's installation site.

Contents of the invention

The purpose of the utility model is to provide a spindle box lifting mechanism of a square column vertical drilling machine with simple structure, safer operation and convenient transportation.

The technical scheme that the utility model adopts is:

The spindle box lifting mechanism of the square column vertical drilling machine includes a motor and a screw rod. The motor is placed upside down on the motor seat in the bed of the drilling machine, and connected to the screw rod through the driving pulley and the passive pulley. The screw rod is parallel to the guide rail of the drilling machine column. An upper bearing assembly and a lower bearing assembly are provided at the upper and lower ends of the screw rod connected to the column guide rail, and a safety nut assembly is threaded on the screw rod, and the safety nut assembly is fixedly connected with the headstock of the drilling machine.

The safety nut assembly includes a main nut, an auxiliary nut, a gland, a nut seat and a steel ball,

The main nut is set in the nut seat, the gland is fixed on the nut seat by screws, the spherical contact between the main nut and the gland,

The main nut is provided with a notch on the end face, and is fixed on the nut seat by inserting a pin into the notch,

The end face convex key of the main nut is flexibly connected with the corresponding end face groove of the auxiliary nut set in the nut seat,

A steel ball groove is provided between the auxiliary nut and the gland, and a ring of steel balls is arranged at the bottom of the steel ball groove.

The distance between the top of the steel ball groove and the top of the steel ball in the groove is 5-10mm greater than the distance between the base of the convex key on the end face of the main nut and the bottom of the groove on the end face of the auxiliary nut.

The motor base is fixed horizontally in the bed by tension screws, and fixed vertically in the bed by screws passing through the pressure plate in the bed.

In the utility model, the motor is placed upside down on the motor seat in the bed of the drilling machine, and the driving pulley and the passive pulley are used to drive the screw to rotate. The screw is parallel to the column guide rail of the drilling machine, and the upper and lower ends of the screw connecting the column guide are provided The upper bearing assembly and the lower bearing assembly, the safety nut assembly is threaded on the screw rod, and the safety nut assembly is fixedly connected with the headstock of the drilling machine. The above-mentioned structure is a structure that does not exist at present, and greatly reduces the height of the machine parts , improving operational safety. The spherical surface contact between the main nut and the gland can withstand the axial force and adjust the assembly error by itself. The pin is inserted into the gap on the end surface to prevent the main nut from rotating. The nut is movably connected with the convex key on the end face of the main nut through its end face groove, and the auxiliary nut just follows the movement without bearing the transmission torque during the lifting movement. Once the main nut wears and breaks, the headstock will inevitably fall. At this time, a ring of steel balls in the steel ball groove will contact the inner end surface of the gland to act as a thrust ball bearing. At the same time, the convex keys and grooves of the main and auxiliary nuts will automatically Disengagement, because the distance between the top of the steel ball groove and the top of the steel ball in the groove is greater than the distance between the base of the convex key on the end face of the main nut and the bottom of the groove on the end face of the auxiliary nut by 5-10mm, in this case, even if the screw is still The headstock can no longer be driven up and down during rotation. Therefore, when the main nut is damaged, no matter whether the screw rod rotates or not, the headstock will only fall a small distance and cannot fall significantly. The upper bearing assembly is composed of deep groove ball bearings and thrust ball bearings, and the upper bearing assembly plays the role of supporting and bearing the weight of the spindle box. The lower bearing assembly is two angular contact ball bearings installed separately in the same direction, which can support and bear the upward component force when the screw is driven.

The utility model has a structure in which the motor in the lower bed of the column drives the screw rod and the safety nut to lift the spindle box through a belt drive. The structure is simple, the operation is safe and convenient, it is easy to be transported in a container, and the appearance is more concise, which greatly reduces the labor intensity of workers and improves work efficiency. .

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the structure in direction A of the bed in Fig. 1 .

Fig. 3 is a structural schematic diagram of the safety nut assembly of the present invention.

Detailed ways

As shown in Figures 1 to 3, 1 is the upper bearing assembly, 2 is the safety nut assembly, 3 is the screw rod, 4 is the driving pulley, 5 is the tension screw, 6 is the motor seat, 7 is the motor, and 8 is the lower bearing Components, 9 is the passive pulley, 10 is the column, 11 is the bed, 12 is the spindle box, 13 is the pressure plate, 14 is the auxiliary nut, 15 is the gland, 16 is the steel ball, 17 is the pin, 18 is the main nut, 19 Be a nut seat, 20 is a steel ball groove, 21 is an end face convex key, 22 is an end face groove, and 23 is a column guide rail.

The spindle box lifting mechanism of the square column vertical drilling machine of the utility model includes a motor 7 and a screw mandrel 3. The motor 7 is placed upside down on the motor seat 6 in the drilling machine bed 11, and is connected with the screw mandrel 3 through the driving pulley 4 and the passive pulley 5. The rod 3 is parallel to the column guide rail 23 of the drilling machine, the upper and lower ends of the screw mandrel 3 connected to the column guide rail 23 are provided with an upper bearing assembly 1 and a lower bearing assembly 8, and the screw rod 3 is threaded with a safety nut assembly 2, and the safety nut assembly 2 is connected to the drilling machine. Headstock 12 is fixedly connected. Safety nut assembly 2 comprises main nut 18, auxiliary nut 14, gland 15, nut seat 19 and steel ball 16, and main nut 18 is sleeved in the nut seat 19, and gland 15 is fixed on the nut seat 19 by screw, and main nut 18 Spherical contact with the gland 15, the main nut 18 is provided with a notch 23 on the end face, and the pin 17 is inserted into the notch to fix it on the nut seat 19, the end face convex key 21 of the main nut 18 and the auxiliary nut set in the nut seat 19 14 is flexibly connected to the corresponding end face groove 22, a steel ball groove 20 is provided between the auxiliary nut 14 and the gland 15, and a ring of steel balls 16 is arranged at the bottom of the steel ball groove 20. The distance between the top of the steel ball groove 20 and the top of the steel ball 16 in the groove is greater than the distance between the base of the convex key 21 on the end surface of the main nut and the bottom of the groove 22 on the end surface of the auxiliary nut by 5-10 mm, and the motor base 6 is fixed laterally by the tension screw 5 In the bed 11, the screw passes through the pressure plate 13 in the bed and is longitudinally fixed in the bed. The upper bearing assembly 1 is composed of deep groove ball bearings and thrust ball bearings. The lower bearing assembly 8 is two angular contact ball bearings mounted in isolation in the same direction.

The utility model operates like this: open the motor 7, the motor 7 drives the passive pulley 5 to decelerate through the driving pulley 4 and makes the threaded screw rod 3 rotate, and the safety nut assembly 2 threaded on the screw rod 3 drives the spindle box 12 Up and down movement.

The speed of motion of the present utility model depends on motor 7 rotating speeds, belt drive reduction ratio and screw pitch (or lead), such as selecting 4 grades of motors, reduction ratio 1/4, screw mandrel 3 being Tr36 * 6, then the lifting speed is 2.16m/min.

The utility model uses the motor 7 to drive the pulley to make the threaded screw 3 rotate, and the unique design of the connection structure between the main nut 18, the auxiliary nut 14 and the gland 15 of the safety nut assembly 2 makes the square column vertical drilling machine It is safer, more convenient and less labor-saving to use, and also makes the whole body more beautiful in appearance.

The headstock elevating mechanism of the utility model can also be applicable to square column vertical drilling and milling machines in addition to square column vertical drilling machines.

Claims (4)

1. The lifting mechanism of the spindle box of the square column vertical drilling machine, including the motor and the screw rod, is characterized in that the motor is placed upside down on the motor seat in the bed of the drilling machine, connected with the screw rod through the driving pulley and the passive pulley, and the screw rod is parallel to the drilling machine The column guide rail, the upper and lower ends of the screw rod connecting the column guide rail are provided with an upper bearing assembly and a lower bearing assembly, and a safety nut assembly is threaded on the screw rod, and the safety nut assembly is fixedly connected with the headstock of the drilling machine. 2. The headstock elevating mechanism of a square-column vertical drilling machine according to claim 1, characterized in that the safety nut assembly includes a main nut, an auxiliary nut, a gland, a nut seat and a steel ball, and the main nut is set in the nut seat , the gland is fixed on the nut seat by screws, the spherical contact between the main nut and the gland, The main nut is provided with a notch on the end face, and is fixed on the nut seat by inserting a pin into the notch, The end face convex key of the main nut is flexibly connected with the corresponding end face groove of the auxiliary nut set in the nut seat, A steel ball groove is provided between the auxiliary nut and the gland, and a ring of steel balls is arranged at the bottom of the steel ball groove. 3. The spindle box lifting mechanism of a square-pillar vertical drilling machine according to claim 2, characterized in that the distance between the top of the steel ball groove and the top of the steel ball in the groove is greater than the base of the convex key on the end face of the main nut and the bottom of the groove on the end face of the auxiliary nut The distance between them is 5-10mm. 4. The headstock elevating mechanism of square column vertical drilling machine according to claim 1, characterized in that the motor seat is fixed horizontally in the bed by tension screws, and fixed in the bed vertically by screws passing through the pressure plate in the bed.

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