CN218036104U - Servo pressure testing machine - Google Patents

Abstract

The utility model relates to the technical field of material detection, in particular to a servo compression testing machine, which comprises a base, wherein four vertical ball screws are connected on the base, the four ball screws sequentially pass through an upper pressing plate and a top plate from bottom to top, the upper pressing plate is fixed on a screw nut, and the top plate is rotationally connected with the ball screws through bearings; a servo motor is fixed on the top plate, an output shaft of the servo motor is connected with a speed reducer, a first chain wheel is fixed on the output shaft of the speed reducer, the first chain wheel is connected with a second chain wheel fixed at the top end of any ball screw through a first chain, and the gear ratio of the second chain wheel to the first chain wheel is 2-3; and the four ball screws are all fixedly provided with third chain wheels, the third chain wheels are all positioned above the top plate, and the four third chain wheels are connected through a second chain. The testing machine solves the problems that a lead screw and a motor of the existing testing machine are easy to lose and high in cost.

Description

Servo pressure testing machine

Technical Field

The utility model relates to a material detects technical field, specifically is a servo compression testing machine.

Background

The compression testing machine is mainly used for the compression strength tests of concrete test pieces and concrete structural members and also used for the compression strength tests of metal materials and metal structural members. The prior art discloses a ring stiffness testing machine like chinese utility model patent of publication No. CN214472324U, installs two sets of drive assembly that are used for carrying out the drive to the top board on the testing machine body, and every drive assembly of group includes servo motor and lead screw, and servo motor during operation drives the lead screw and rotates.

The double-motor double-screw structure plays a role in supporting the testing machine and driving the upper pressure plate to move up and down, however, the structure enables the load of the double screws to be heavy, and the service life of the screws is reduced; the double servo motors are high in cost, need to realize low-speed stable output, high in difficulty, easy to consume and urgent to solve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a servo compression testing machine to the lead screw and the easy loss of motor, the problem with high costs of the current testing machine who proposes in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a servo pressure testing machine comprises a base, wherein a horizontal lower pressing plate is arranged on the base, four vertical ball screws are rotatably connected to the base through bearings, the four ball screws sequentially penetrate through an upper pressing plate and a top plate from bottom to top, the top plate is positioned at the upper end of each ball screw, matched nuts are arranged on the four ball screws, the upper pressing plate is fixed on the nuts, and the top plate is rotatably connected with the ball screws through the bearings;

a servo motor is fixed in the center of the top plate, an output shaft of the servo motor is connected with a speed reducer, a first chain wheel is fixed on the output shaft of the speed reducer, the first chain wheel is connected with a second chain wheel fixed at the top end of any ball screw through a first chain, and the gear ratio of the second chain wheel to the first chain wheel is 2-3;

and the four ball screws are all fixedly provided with third chain wheels, the third chain wheels are all positioned above the top plate, and the four third chain wheels are connected through a second chain.

As a further aspect of the present invention: vertical protection covers are welded on the left side and the right side of the top plate and the base.

As a further aspect of the present invention: the horizontal section of the protective cover is U-shaped.

Compared with the prior art, the beneficial effects of the utility model are that: the rotating speed of the servo motor is reduced through the speed reducer and the chain transmission structure, the torque is increased, the requirement on the servo motor is reduced, and the cost is reduced; the four ball screws share the pressure of the top plate and the upper pressure plate, the supporting force is strong, the upper pressure plate is not easy to damage, and the service life of the equipment is prolonged; set up the protection casing through testing machine both sides, prevent that experimental materials from reaching the ultimate strength and injuring operating personnel when appearing collapsing the phenomenon.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Wherein: 1 ball, 2 second sprocket, 3 chain one, 4 first sprocket, 5 chain two, 6 third sprocket, 7 reduction gears, 8 servo motor, 9 roof, 10 top plates, 11 bases, 12 holding down plates.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

Referring to fig. 1, the utility model provides a servo compression testing machine, its structure includes base 11, is equipped with a horizontal holding down plate 12 on base 11, connects four vertical ball 1 on base 11 through the bearing rotation, and four ball 1 pass top board 10 and roof 9 from bottom to top in proper order, and roof 9 is located the upper end of ball 1, all is equipped with the screw that matches on four ball 1, and top board 10 is fixed on the screw, and roof 9 and ball 1 rotate through the bearing and connect;

a servo motor 8 is fixed in the center of the top plate 9, the output shaft of the servo motor 8 is connected with a speed reducer 7, the servo motor 8 can stably output at a low speed by the aid of the speed reducer 7, and the requirement for a testing machine can be met without selecting the servo motor 8 with high cost. A first chain wheel 4 is fixed on an output shaft of the speed reducer 7, the first chain wheel 4 is connected with a second chain wheel 2 fixed at the top end of any ball screw 1 through a chain I3, the gear ratio of the second chain wheel 2 to the first chain wheel 4 is 2-3, and the gear ratio enables the chain wheel structure to be capable of stably transmitting, further reducing the rotating speed, increasing the torque, reducing the requirement on the output torque of the servo motor 8 and further reducing the cost;

and the four ball screws 1 are all fixedly provided with a third chain wheel 6, the third chain wheels 6 are all positioned above the top plate 9, and the four third chain wheels 6 are connected through a second chain 5.

Vertical protection covers are welded on the left side and the right side of the top plate 9 and the base 11, and the horizontal cross section of each protection cover is U-shaped. Set up the protection casing through testing machine both sides, prevent that experimental materials from reaching the ultimate strength and injuring operating personnel when appearing collapsing the phenomenon. In addition, the taking of the test piece is not influenced.

The working principle is as follows: the test piece is placed on holding down plate 12, starts servo motor 8, drives first sprocket 4 and rotates, makes second sprocket 2 rotate through chain one 3, and coaxial fixed third sprocket 6 rotates, makes all the other three third sprockets 6 rotate through chain two 5, and then makes four ball 1 rotate, and then drives top board 10 and follow the screw and move down and carry out the compressive strength test on the test piece. And starting the servo motor 8 to rotate reversely, and driving the upper pressing plate 10 to move upwards to the original position along with the nut.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims (3)

1. A servo compression testing machine which is characterized in that: the automatic feeding device comprises a base, wherein a horizontal lower pressing plate is arranged on the base, the base is rotatably connected with four vertical ball screws through bearings, the four ball screws sequentially penetrate through an upper pressing plate and a top plate from bottom to top, the top plate is positioned at the upper ends of the ball screws, matched nuts are arranged on the four ball screws, the upper pressing plate is fixed on the nuts, and the top plate is rotatably connected with the ball screws through the bearings;

a servo motor is fixed in the center of the top plate, an output shaft of the servo motor is connected with a speed reducer, a first chain wheel is fixed on the output shaft of the speed reducer, the first chain wheel is connected with a second chain wheel fixed at the top end of any ball screw through a first chain, and the gear ratio of the second chain wheel to the first chain wheel is 2-3;

and the four ball screws are all fixedly provided with third chain wheels, the third chain wheels are all positioned above the top plate, and the four third chain wheels are connected through a second chain.

2. The servo pressure tester of claim 1, wherein: vertical protection covers are welded on the left side and the right side of the top plate and the base.

3. A servo compression tester according to claim 2, characterized in that: the horizontal section of the protective cover is U-shaped.

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