CN108279122B

CN108279122B - Spring riveting reliability testing device and using method

Info

Publication number: CN108279122B
Application number: CN201810140804.XA
Authority: CN
Inventors: 林龙镔; 丰正伟; 沈耀辉
Original assignee: Xiamen University Tan Kah Kee College
Current assignee: Xiamen University Tan Kah Kee College
Priority date: 2018-02-11
Filing date: 2018-02-11
Publication date: 2023-08-01
Anticipated expiration: 2038-02-11
Also published as: CN108279122A

Abstract

The invention provides a spring riveting reliability testing device and a using method thereof, wherein the device comprises the following components: a rotary table A and a rotary table B which are positioned on planes and are not parallel to each other and are provided with one or more hanging rods; the rotary table A and the rotary table B are driven by a speed reducer driven by a motor to synchronously rotate; hanging rods on the turnplate A and the turnplate B are arranged in pairs. The invention has simple structure, low cost, high practicability and strong universality. Compared with the existing manual detection method, the invention realizes the following good technical effects: 1, only 1 operator is needed for each detection, so that labor is saved; (2) The scheme realizes semi-automatic operation, so that the detection efficiency is greatly improved; (3) The stretched extension distance of the spring is set by a detector in advance, manual intervention is not needed, the detection force with specific value applied to the spring can be realized, the detection force value is stable and reliable, and the detection effect of the spring is better ensured; (4) The tension force is provided by the motor, so that the labor intensity of personnel can be reduced.

Description

Spring riveting reliability testing device and using method

Technical Field

The invention belongs to the field of detection instruments, and particularly relates to a spring riveting reliability testing device and a using method thereof.

Background

Springs are one of the commonly used fittings on exercise machines that provide tension to the exercise machine to perform the function of the exercise machine. The spring is typically connected to the exercise machine by a workpiece which is in rivet connection therewith, which workpiece serves not only to secure the spring to the exercise machine, but also to transmit the tension of the spring. The reliability of the spring and workpiece rivet connection will affect the normal use of the exercise machine and the personal safety of the machine user, and therefore is highly appreciated by the machine manufacturer. In order to ensure the quality of the exercise machine product and avoid physical injury to the user, 100% of the riveting reliability of the spring fitting must be detected.

(1) Schematic diagram of spring to be tested

As shown in figure 1 of the accompanying drawings, the spring product to be detected consists of a spring, a workpiece A with a hole and a workpiece B (wire rope riveting). Wherein the connection of the spring with the work piece A and the work piece B with holes is realized by riveting. Holes on the workpiece A and the workpiece B are respectively used for being connected with the body-building equipment, so that the tension of the springs is conducted to the body-building equipment, and the function of the body-building equipment is realized.

Detection part: the method is mainly characterized by the reliability of riveting connection of a workpiece and a spring. The riveting part is required to be safe and reliable in the working state of the product, and the riveting part is not separated, so that the conduction of the tension force of the spring is realized.

(2) Existing detection technical scheme

According to the existing detection method, detection is mainly carried out by manual operation and simple lever principle, and the detection is shown in figure 2 of the attached drawing. In the existing detection method, 2 operators are required to complete detection work together. The operation steps are as follows:

firstly, one operator takes charge of hanging holes of workpieces A and B on a spring product to be detected to a hanging point A at the tail end of a lever and a hanging point B on a base respectively;

then, another operator applies a downward force on the end of the simple lever, causing the spring to stretch to a prescribed extension distance. At the moment, the riveting between the spring and the workpiece is reliable, and the detected product is qualified if the loosening does not occur, so that the spring is tested;

and finally, the operator removes the force applied to the lever to enable the spring to return to the normal length, and the operator responsible for hanging the hole takes down the spring, so that the whole detection action is completed.

(3) Disadvantages of the existing detection methods

The existing detection method mainly relies on manual operation to detect by matching with a simple lever principle, and mainly has the following defects: (1) 2 operators are required to complete the coordination, and the efficiency is low; (2) the applied detection force is manually applied by a detector, so that the applied detection force has certain discreteness, and the tensile force of the spring and the theoretical tensile force have human errors, so that the detection effect and the reliability are affected; (3) because of manual operation and manual force application, the labor intensity of workers is high.

Disclosure of Invention

Aiming at the defects and the blank existing in the prior art, the original detection method mainly depends on manual operation to detect by matching with a simple lever principle, has low efficiency and high labor consumption, and has higher working intensity for detection staff, and the invention aims at: (1) According to the type of the detected product, a detection force with a specific value is applied, the value of the applied detection force is stable, and the detection effect of the spring is better ensured; (2) the working efficiency of the spring detection can be improved; and (3) the labor intensity of detection personnel can be reduced.

The technical scheme is as follows:

the utility model provides a spring riveting reliability testing arrangement which characterized in that includes: a rotary table A and a rotary table B which are positioned on planes and are not parallel to each other and are provided with one or more hanging rods; the rotary table A and the rotary table B are driven by a speed reducer driven by a motor to synchronously rotate; hanging rods on the turnplate A and the turnplate B are arranged in pairs.

Preferably, the turntable A, the turntable B, the motor and the speed reducer are arranged on the frame; the turntable A is driven to rotate by an output shaft of the speed reducer; the rotating shaft of the rotating disc A is collinear with the output shaft of the speed reducer; the rotary table B is driven to rotate by a transmission shaft connected with an output shaft of the speed reducer, the rotary table B is perpendicular to the transmission shaft, and an included angle formed by the transmission shaft and the output shaft of the speed reducer is an obtuse angle.

Preferably, a hanging needle is arranged at the tail end of the hanging rod.

Preferably, the distance between the hanging needles at the tail ends of the hanging rods is nearest when the hanging needles rotate to the lowest point, and the distance increases with the rise of the height until the distance is farthest when the hanging needles rotate to the highest point.

Preferably, when the spring on the test article hung on the hanging needle at the tail end of the hanging rod is positioned at a point between the highest point and the lowest point of the hanging needle, the spring does not elastically deform, and the point is a loading and unloading point.

Preferably, the number of the feeding points and the discharging points is two, and the feeding points and the discharging points are symmetrically distributed through the rotating shaft of the rotating disc A or the rotating disc B.

Preferably, the distance between the feeding point and the discharging point and the lowest point of the hanging needle is smaller than the distance between the feeding point and the highest point of the hanging needle; the hanging needle rotates from the feeding point to the discharging point through the major arc of the circle.

Preferably, a stripper plate is arranged on the side part of the blanking point.

Preferably, the turntable A and the turntable B are arranged on two sides of the speed reducer symmetrically.

The application method of the preferred scheme of the invention is characterized by comprising the following steps:

step 1: the motor is electrified, and the output shaft of the speed reducer starts to rotate;

step 2: selecting a pair of hanging rods, and respectively hanging two ends of a test article at the hanging needle positions of the pair of hanging rods when the hanging needle rotates between the upper material position and the upper material position;

step 3: when the hanging needle rotates to the highest point, if the riveting part of the test article does not loose, judging the test article as a qualified article;

step 4: after the hanging needle rotates through the blanking point, the test article touches the discharging plate and is separated from the pair of hanging rods and falls down.

The invention has simple structure, low cost, high practicability and strong universality. Compared with the existing manual detection method, the invention realizes the following good technical effects:

(1) Only 1 operator is needed for each detection, so that labor is saved;

(2) The scheme realizes semi-automatic operation, so that the detection efficiency is greatly improved;

(3) The stretched extension distance of the spring is set by a detector in advance, manual intervention is not needed, the detection force with specific value applied to the spring can be realized, the detection force value is stable and reliable, and the detection effect of the spring is better ensured;

(4) The tension force is provided by the motor, so that the labor intensity of personnel can be reduced.

Drawings

The invention is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a schematic diagram of a test article according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a test article detecting apparatus in the prior art;

FIG. 3 is a schematic perspective view of the whole structure of the embodiment of the present invention;

FIG. 4 is a schematic front view of the overall structure of an embodiment of the present invention;

FIG. 5 is a schematic side view of the overall structure of an embodiment of the present invention;

FIG. 6 is a schematic top view of the overall structure of an embodiment of the present invention;

in the figure: 1-a frame; 2-an electric motor; 3-a speed reducer; 4-an output shaft; 5-a transmission shaft; 6-a turntable A; 7-a turntable B; 8-hanging a needle; 9-test article.

Detailed Description

In order to make the features and advantages of the present patent more comprehensible, embodiments accompanied with figures are described in detail below:

as shown in fig. 1, the structure of the test article 9 according to the embodiment of the present invention is composed of three parts, namely, a spring, a work piece a with a hole, and a work piece B (wire rope riveting). Wherein the connection of the spring with the work piece A and the work piece B with holes is realized by riveting.

As shown in fig. 3, the apparatus according to the embodiment of the present invention includes: a turntable A6 and a turntable B7 which are positioned on planes and are not parallel (form a certain included angle) and are provided with a plurality of fan-shaped hanging rods which are uniformly distributed; the turntable A6 and the turntable B7 are driven by a speed reducer 3 driven by a motor 2 to synchronously rotate; the hanging rods on the turnplate A6 and the turnplate B7 are arranged in pairs.

As shown in fig. 3 and 4, a turntable A6, a turntable B7, a motor 2 and a speed reducer 3 are arranged on the frame 1; the rotary table A6 is driven to rotate by the output shaft 4 of the speed reducer 3, the rotary table A6 is perpendicular to the output shaft 4 of the speed reducer 3, and the rotary shaft of the rotary table A6 is collinear with the output shaft 4 of the speed reducer 3; the rotary disk B7 is driven to rotate by a transmission shaft 5 connected with the output shaft 4 of the speed reducer 3, the rotary disk B7 is perpendicular to the transmission shaft 5, and an included angle formed by the transmission shaft 5 and the output shaft 4 of the speed reducer 3 is an obtuse angle.

In this embodiment, the hanging needle 8 is disposed at the end of the hanging rod so as to form a fit with the workpiece a and the workpiece B with holes of the test article 9, so that the test article 9 is hung on the machine, and the fit is not fixed, but the holes pass through the hanging needle 8 mainly by using gravity and friction, and when the hanging needle 8 rotates to a low point, the test article 9 is easy to drop from the hanging needle 8.

In the device of this embodiment, the interval between the turntable A6 and the turntable B7 is adjustable, and the angle is also adjustable, so as to adapt to the test articles 9 of various specifications and models.

In order to achieve the best test effect, in this embodiment, the distance and angle between the turntable A6 and the turntable B7 are adjusted by the following rule pair:

the distance between the hanging needle 8 at the tail end of any pair of hanging rods on the rotary table A6 and the rotary table B7 is nearest when the hanging needle rotates to the lowest point, the distance increases along with the rise of the height, and the distance is farthest when the hanging needle rotates to the highest point;

the spring on the test article 9, the two ends of which are hung on the hanging needle 8 at the tail ends of the hanging rods, does not elastically deform when being positioned at a point between the highest point and the lowest point of the hanging needle 8, and the point is most suitable to be set as a loading and unloading point because lateral friction force is not generated between holes of the workpiece A and the workpiece B and the hanging needle 8;

wherein, go up the unloading point and have two, be material loading point and unloading point respectively, material loading point and unloading point are with carousel A6 or carousel B7's pivot symmetric distribution, set up in the both sides of pivot.

The distance between the feeding point and the discharging point and the lowest point of the hanging needle 8 is smaller than the distance between the feeding point and the highest point of the hanging needle 8; the hanging needle 8 rotates from the feeding point to the discharging point through the major arc of the circle (the arc which passes through from the low point to the highest point and then to the low point and is larger than the semicircle).

The lateral part of unloading point is provided with the stripper to the test article 9 touches the stripper after rotatory unloading point in order to more do benefit to its follow pin 8 and drop.

In this embodiment, in order to further improve the utilization efficiency of the unit, two groups of the turntable A6 and the turntable B7 are symmetrically disposed on both sides of the speed reducer 3.

The function of the device of this embodiment is described in more detail below:

(1) test article 9 detection process

The power switch is turned on, the motor 2 outputs kinetic energy after rotating to the speed reducer 3, the kinetic energy drives the rotary table A6 and the rotary table B7 to slowly rotate through the transmission shaft 5, and the rotary table drives the hanging rod to slowly rotate. When the turntable rotates, the position of the hanging rod is gradually raised from the lowest point, and after reaching the highest point, the hanging rod descends to the lowest point again, so that one rotation period is completed. In the rotation period, the distance between any pair of hanging rods is gradually increased from the minimum distance, and the distance is gradually reduced to the minimum distance after the distance is maximized.

Holes on the workpieces A and B of the test article 9 are manually hung on the hanging needles 8 of the pair of hanging rods respectively, the springs are slowly stretched along with the slow rotation of the turntable, and when the pair of hanging rods rotate to the highest point, the springs of the test article 9 are stretched to the longest distance. The stretching of the spring with specific elongation is realized, and the reliability of the riveting connection between the spring and the workpiece under the condition of specific elongation is detected. And the tested product 9 which is qualified after detection gradually shortens the original recovery distance along with the continuous rotation of the turntable. When the spring of the test article 9 is shortened to the original distance at the blanking point, the spring falls off from the hanging rod, and the whole detection process is completed.

(2) Distance adjustment of rotating disk A6 and rotating disk B7

The position of the rotary disk B7 on the transmission shaft 5 can be adjusted, so that the rotary disk B7 is suitable for tested products with different specifications. Setting of the specific detected tension value can also be achieved by the distance between the turntable A6 and the turntable B7. The tension force of the spring to be provided in the body-building apparatus can be confirmed according to the functional requirement of the apparatus, the detection force is amplified by a certain multiple according to the tension force value provided by the spring, then the theoretical extension distance of the spring can be calculated according to the detection force and the stiffness of the spring, and finally the position of the turntable is adjusted according to the theoretical extension distance. Therefore, the functional requirement of applying specific detection force to the specific spring is met, and the effectiveness and reliability of spring riveting reliability detection are ensured.

(3) Adjustment of the angle between the axes of a connecting turntable

Because the transmission shaft 5 and the output shaft 4 of the speed reducer 3 have a certain inclination angle, the inclination angle value of the turntable B7 can be adjusted through the hinged arrangement of the transmission shaft 5 and the output shaft 4. Through the adjustment to the fixed axle inclination of this carousel, can further perfect the suitability of this embodiment device, make it be applicable to the riveting connection reliability detection of more spring product types, realize a tractor serves several purposes.

The application method of the device provided by the embodiment of the invention specifically comprises the following steps:

step 1: the motor 2 is electrified, and the output shaft 4 of the speed reducer 3 starts to rotate;

step 2: selecting a pair of hanging rods, and respectively hanging two ends of a test article 9 at the hanging needle 8 of the pair of hanging rods when the hanging needle 8 rotates between the upper material positions;

step 3: when the hanging needle 8 rotates to the highest point, if the riveting part of the test article 9 is not loosened, judging that the test article is qualified;

step 4: after the hanging needle 8 rotates to pass through the blanking point, the test article 9 touches the discharging plate and is separated from the pair of hanging rods and falls down, so that the test article 9 is smoothly separated from the machine, and the separated test article 9 moves to the test article 9 collecting basket along the discharging plate and the extending part thereof under the action of gravity, and the whole process action of product detection is finished.

The present invention is not limited to the above-mentioned best mode, any person can obtain other various spring riveting reliability test devices and using methods under the teaching of the present invention, and all equivalent changes and modifications made according to the scope of the present invention should be covered by the present invention.

Claims

1. The utility model provides a spring riveting reliability testing arrangement which characterized in that includes: a rotary table A and a rotary table B which are positioned on planes and are not parallel to each other and are provided with one or more hanging rods; the rotary table A and the rotary table B are driven by a speed reducer driven by a motor to synchronously rotate; hanging rods on the turnplate A and the turnplate B are arranged in pairs;

the turntable A, the turntable B, the motor and the speed reducer are arranged on the frame; the turntable A is driven to rotate by an output shaft of the speed reducer; the rotating shaft of the rotating disc A is collinear with the output shaft of the speed reducer; the rotary table B is driven to rotate by a transmission shaft connected with an output shaft of the speed reducer, the rotary table B is perpendicular to the transmission shaft, and an included angle formed by the transmission shaft and the output shaft of the speed reducer is an obtuse angle;

the tail end of the hanging rod is provided with a hanging needle;

the distance between the hanging needles at the tail ends of the hanging rods is nearest when the hanging needles rotate to the lowest point, and the distance increases along with the rise of the height until the hanging needles rotate to the highest point, and the distance is farthest;

the spring of the test article, the two ends of which are hung on the hanging needle at the tail end of the hanging rod, is not elastically deformed when being positioned at a point between the highest point and the lowest point of the hanging needle, and the point is a loading and unloading point;

selecting a pair of hanging rods, and respectively hanging two ends of a test article at the hanging needle positions of the pair of hanging rods when the hanging needle rotates between the upper material position and the upper material position;

when the hanging needle rotates to the highest point, if the riveting part of the test article does not loose, the test article is judged to be a qualified article.

2. The spring riveting reliability testing apparatus of claim 1 wherein: the two feeding and discharging points are respectively a feeding point and a discharging point, and the feeding point and the discharging point are symmetrically distributed through the rotating shaft of the rotating disc A or the rotating disc B.

3. The spring riveting reliability testing apparatus of claim 2 wherein: the distance between the feeding point and the discharging point and the lowest point of the hanging needle is smaller than the distance between the feeding point and the highest point of the hanging needle; the hanging needle rotates from the feeding point to the discharging point through the major arc of the circle.

4. A spring riveting reliability testing apparatus as defined in claim 3 wherein: the lateral part of unloading point is provided with the stripper.

5. The spring riveting reliability testing apparatus of claim 1 wherein: the turntable A and the turntable B are two groups and are symmetrically arranged on two sides of the speed reducer.

6. The method of using a spring riveting reliability testing apparatus as defined in claim 4, comprising the steps of: