CN206818406U - Device for Batch Testing Spring Stiffness Coefficient - Google Patents

Abstract

The device of batch detection device of spring stiffness coefficient, it is related to detection device technical field, it includes fixed seat, line slideway, multiple sliding blocks being slidably connected on line slideway, the haulage gear slided for drawing the sliding block on line slideway, displacement detecting mechanism and the slider displacement amount for being detected according to the tractive force size and displacement detecting mechanism of the haulage gear for detecting the slider displacement amount calculate the computing unit of device of spring stiffness coefficient, the fixed seat is fixedly installed on the front end of line slideway, the haulage gear is located at the rear end of line slideway, the sliding block spacing side by side is arranged between fixed seat and haulage gear, the displacement detecting mechanism is connected with computing unit.The utility model once can detect the stiffness factor of more springs, and detection efficiency is higher.

Description

Device for Batch Testing Spring Stiffness Coefficient

technical field

The utility model relates to the technical field of detection equipment, in particular to a device for batch detection of spring stiffness coefficients.

Background technique

The spring is a widely used reset element. The stiffness coefficient of the spring is the ratio of the axial force of the spring to the axial deformation (k=F/s), which is a parameter to measure the performance of the spring. Before leaving the factory, each batch of springs has to be tested for its stiffness coefficient through a tensile test. Currently, the spring stiffness coefficient detectors on the market can only measure one spring at a time, and the detection efficiency is low. In addition, due to the large volume of samples that need to be tested during mass production in the factory, multiple detectors need to be purchased to meet production needs, and the cost of equipment procurement is relatively high.

Utility model content

The technical problem to be solved by the utility model is to provide a device capable of detecting spring stiffness coefficients in batches, which can detect the stiffness coefficients of multiple springs at one time, and the detection efficiency is high.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: a device for detecting spring stiffness coefficients in batches, including a fixed seat, a linear guide rail, a plurality of sliders slidably connected to the linear guide rail, and used for pulling the sliders. A traction mechanism for the block to slide on the linear guide rail, a displacement detection mechanism for detecting the displacement of the slider, and a device for calculating the spring stiffness coefficient according to the traction force of the traction mechanism and the displacement of the slider detected by the displacement detection mechanism. The calculation unit, the fixed seat is fixedly arranged at the front end of the linear guide rail, the traction mechanism is arranged at the rear end of the linear guide rail, the sliders are arranged side by side between the fixed seat and the traction mechanism, the displacement detection mechanism and the calculation unit unit connection.

Further, the displacement detection mechanism includes a sliding rheostat, a resistance measuring unit and a processor, and the sliding rheostat includes a resistance wire and a plurality of sliders, and each slider is correspondingly connected to a slider, and the slider is against the resistor. On the wire, the slider and one end of the resistance wire are connected to a resistance measurement unit, the resistance measurement unit is connected to a processor, the processor is connected to a calculation unit, and the processor changes according to the resistance value measured by the resistance measurement unit Calculate the displacement of the slider.

Further, the displacement detection mechanism includes a scale grating, a processor, and a plurality of grating reading heads for reading scale data on the scale grating. The scale grating is arranged parallel to the linear guide rail, and the grating reading heads are connected one by one. For the slider, the processor is connected with the calculation unit, and when the slider moves, the processor calculates the displacement of the slider according to the change of the scale data read by the grating reading head.

Furthermore, the displacement detection mechanism includes a slide rail arranged parallel to the linear guide rail, a detection block, a photoelectric sensor, a processor, a laser displacement sensor for monitoring the position of the detection block, and a device for driving the detection block to slide on the slide rail. Drive mechanism, the detection block is slidingly connected with the slide rail, the photoelectric sensor includes a transmitter and a receiver respectively installed on the slide block and the detection block, the receiver is connected to a detection circuit, the detection circuit and the laser displacement The sensor is connected to the processor, and the processor is connected to the calculation unit. When the receiver receives the light signal sent by the transmitter, the processor determines the position of the slider according to the position of the detection block detected by the laser displacement sensor at this time, The processor calculates the displacement of the slider according to the position change of the slider.

Furthermore, it also includes a workbench, and the fixed seat, the linear guide rail and the traction mechanism are all installed on the workbench.

Furthermore, the rear end surface of the fixed seat and the front and rear end surfaces of the slider are provided with hanging rings for hanging the spring to be tested.

Furthermore, the traction mechanism includes an electric cylinder, and the top end of the piston rod of the electric cylinder is provided with a buckle for buckling the hanging ring on the slider.

Furthermore, the two side walls of the linear guide rail are provided with V-shaped grooves, and the slider is provided with a protrusion matching the V-shaped groove, and the protrusion is provided with a plurality of linearly arranged balls. , the ball is against the inner wall of the V-shaped groove.

The working principle of the utility model is as follows: First connect the springs in series through a plurality of sliders, connect the front end springs to the fixed seat, and make each spring in a natural state, and then pull the sliding slider with the traction force of F through the traction mechanism. At this time, the force of each spring is F (select a high-precision slide rail pair, so that the friction coefficient between the slider and the linear guide rail can be ensured to be extremely small, so that the friction force has little influence on the pulling force, which can be ignored Neglect), stop the traction mechanism after pulling for a certain distance, so that each spring is in a static stretching state, at this time, the difference between the displacements of the two sliders connected to the spring is the stretching amount s of the spring, through the formula k =F/s to calculate the stiffness coefficient k value of the spring.

In the utility model, the displacement of the slider is provided to the calculation unit by the displacement detection mechanism, and the calculation unit calculates the difference between the displacement of the sliders at both ends of the connecting spring to obtain the stretching amount s of the spring. Then according to the traction force F value provided by the traction mechanism and the formula k=F/s, the stiffness coefficient k value of the corresponding spring can be calculated. It can be seen from the above description that the detection device provided by the utility model can detect the stiffness coefficients of multiple springs at one time through the slider and connect multiple springs at the same time, and there is no limit to the length of the springs. The length and strength of each spring to be tested The degree coefficients can be different, with high detection efficiency, especially suitable for batch detection in spring production factories.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model embodiment 1;

Fig. 2 is a schematic cross-sectional structure diagram of a linear guide rail and a slider in Embodiment 1;

Fig. 3 is the overall structure schematic diagram of the utility model embodiment 2;

Fig. 4 is a schematic diagram of the overall structure of Embodiment 3 of the present utility model.

The reference signs are:

1——fixed seat 2——linear guide 3——slider

4——traction mechanism 4a——electric cylinder 5——displacement detection mechanism

5a——scale grating 5b——sliding rail 5c——detection block

6—calculation unit 7—workbench.

detailed description

In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying Any device or element must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be The internal communication between two elements may be direct connection or indirect connection through an intermediary. Those skilled in the art can understand the specific meanings of the terms according to specific situations.

It needs to be explained in advance that the utility model does not involve the improvement of the control program and the calculation program of the detection device. The control program and the calculation program used in the utility model are all derived from the prior art. Simple (find the displacement difference first, and then find the stiffness coefficient value through the stiffness coefficient formula), so in actual application, the calculation unit in the utility model can directly use the computer with Excel software installed in the testing laboratory, and use Excel The built-in function formula and automatic calculation function can complete the calculation. Equally, parts such as the sensor that the utility model adopts all come from prior art, and these sensors are generally used on detection instrument and lathe, and its control program also all is existing.

In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the implementation modes are not limitations of the utility model.

Example 1

As shown in Figure 1, a kind of device that detects spring stiffness coefficient in batches, comprises fixed seat 1, linear guide rail 2, a plurality of slide blocks 3 that are slidably connected on linear guide rail 2, is used for pulling described slide block 3 in a straight line The traction mechanism 4 sliding on the guide rail 2, the displacement detection mechanism 5 for detecting the displacement of the slider 3, and the spring for calculating the displacement of the slider 3 detected by the traction force of the traction mechanism 4 and the displacement detection mechanism 5 Stiffness coefficient calculation unit 6, the fixed seat 1 is fixedly arranged on the front end of the linear guide rail 2, the traction mechanism 4 is arranged on the rear end of the linear guide rail 2, and the sliders 3 are arranged side by side at intervals between the fixed seat 1 and the traction Between the mechanisms 4 , the displacement detection mechanism 5 is connected with the computing unit 6 .

In the device for detecting spring stiffness coefficients in batches provided by the above embodiment, the springs are first connected in series through a plurality of sliders 3, the frontmost spring is connected to the fixed seat 1, and the springs are in a natural state, and then the springs are pulled in a natural state. The mechanism 4 pulls the slider 3 with a certain force of F. At this time, the force of each spring is F (select a high-precision slide rail pair, so that the friction coefficient between the slider and the linear guide rail can be guaranteed to be extremely small. The influence of the frictional force on the pulling force is very small and can be ignored), and the traction mechanism 4 is stopped after pulling for a certain distance, so that each spring is in a static tension state. At this time, the displacement of the two sliders 3 connected to the spring The difference is the stretching amount s of the spring, and the stiffness coefficient k value of the spring can be calculated by the formula k=F/s. Wherein, the displacement of the slider 3 is provided to the calculation unit 6 by the displacement detection mechanism, and the calculation unit 6 calculates the difference between the displacements of the slider 3 at both ends of the connecting spring to obtain the stretching amount s of the spring, Then according to the traction force F value provided by the traction mechanism 4 and the formula k=F/s, the stiffness coefficient k value of the corresponding spring can be calculated. As can be seen from the above description, the detection device provided by the utility model can detect the stiffness coefficients of multiple springs at one time, and there is no limit to the length of the springs. The lengths and stiffness coefficients of each spring to be tested can be different, and have higher High detection efficiency, especially suitable for batch detection in spring production factories.

Further, the displacement detection mechanism 5 includes a sliding rheostat, a resistance measuring unit and a processor. The sliding rheostat includes a resistance wire and a plurality of sliders. Each slider 3 is correspondingly connected to a slider, and the slider leans against the resistance wire. and one end of the resistance wire is connected to the resistance measuring unit, the resistance measuring unit is connected to the processor, and the processor is connected to the calculation unit 6, and the processor can calculate the displacement of the slider 3 according to the change of the resistance value measured by the resistance measuring unit. The displacement sensor composed of a rheostat, a resistance measuring unit and a processor can make the signal output more sensitive and have a long service life.

Further, it also includes a workbench 7, the fixed seat 1, the linear guide rail 2 and the traction mechanism 4 are all installed on the workbench 7, in this embodiment, the workbench 7 table is a horizontal plane, to facilitate the adjustment of each equipment, Ensure the stability of test results.

Still further, a hanging ring for hanging the spring to be measured can also be arranged on the rear end face of the fixed seat 1 and the front end face and the rear end face of the slide block 3, thereby facilitating the spring to be hooked on the fixed seat 1 or the slide block quickly 3, to further improve the detection efficiency.

Further, the traction mechanism 4 includes an electric cylinder 4a, the top of the piston rod of the electric cylinder 4a is provided with a buckle for fastening the hanging ring on the slider 3, and the electric cylinder 4a is used to provide traction to pull the spring, the effect is stable and the controllability is good .

It should be further explained that the force gauge can first be used to determine the magnitude of the pulling force generated when the piston rod of the electric cylinder 4a is stretched for a certain distance (for example, the piston rod is stretched to the limit), since the stretching distance can be guaranteed to be constant The tension value is fixed, so in the subsequent spring detection work, the magnitude of the tension (ie F) can be input into the controller in advance, and the piston rod is stretched to a predetermined distance each time when the spring is to be detected. Directly use the pulling force to perform related calculations.

Further, as shown in Figure 2, V-shaped grooves can be set on the two side walls of the linear guide rail 2, and a protrusion matching the V-shaped groove is provided on the slider 3, and then a plurality of linearly arranged protrusions are arranged on the protrusion. The balls are used to make the balls lean against the inner wall of the V-shaped groove, which can make the slider 3 slide more smoothly on the linear guide rail 2, and make the friction between the two become rolling friction, and the friction coefficient is extremely small. The smoothness when the slider 3 slides can be improved.

Example 2

The difference between Embodiment 2 and Embodiment 1 is mainly that the structure of the displacement detection mechanism 5 is different. As shown in Figure 3, in Embodiment 2, the displacement detection mechanism 5 includes a scale grating 5a, a processor and a plurality of scales for reading scales. The grating reading head for the scale data on the grating 5a, the scale grating 5a is set parallel to the linear guide rail 2, the grating reading head is connected to the slider 3 in one-to-one correspondence, the processor is connected to the computing unit 6, when the slider 3 moves, the processor is connected according to the grating The displacement of the slider 3 is calculated by the change of the scale data read by the reading head.

Example 3

The difference between embodiment 3 and embodiment 1 is mainly that the structure of the displacement detection mechanism 5 is different. As shown in Figure 4, the displacement detection mechanism 5 includes a slide rail 5b arranged parallel to the linear guide rail 2, a detection block 5c, a photoelectric sensor, a processing device, a laser displacement sensor for monitoring the position of the detection block 5c, and a drive mechanism (not shown in the drawings) for driving the detection block 5c to slide on the slide rail 5b, the detection block 5c is slidably connected with the slide rail 5b, and the photoelectric sensor It includes a transmitter and a receiver installed on the slider 3 and the detection block 5c respectively, the receiver is connected to a detection circuit (not shown in the drawings), the detection circuit and the laser displacement sensor are connected to the processor, and the processor is connected to the calculation unit 6 , when the receiver receives the optical signal sent by the transmitter, the processor determines the position of the slider 3 according to the position of the detection block 5c monitored by the laser displacement sensor at this time, and the processor calculates the position of the slider 3 according to the position change of the slider 3 displacement.

The above-mentioned embodiment is a preferred implementation of the utility model. In addition, the utility model can also be realized in other ways. Any obvious replacement is within the scope of protection of the utility model without departing from the concept of the technical solution. Inside.

In order for those of ordinary skill in the art to more easily understand the improvement of the utility model compared to the prior art, some drawings and descriptions of the utility model have been simplified, and for the sake of clarity, this application document has also omitted some other elements, those of ordinary skill in the art should be aware that these omitted elements may also constitute the content of the present utility model.

Claims (8)

1. A device for batch detection of spring stiffness coefficients, including a fixed seat (1), a linear guide rail (2), a plurality of sliders (3) slidingly connected to the linear guide rail (2), and used to pull the slider ( 3) The traction mechanism (4) sliding on the linear guide rail (2), the displacement detection mechanism (5) used to detect the displacement of the slider (3), and the The calculation unit (6) for calculating the spring stiffness coefficient with the displacement of the slider (3) detected by the displacement detection mechanism (5), the fixed seat (1) is fixedly arranged on the front end of the linear guide rail (2), and the traction mechanism (4) Set at the rear end of the linear guide rail (2), the sliders (3) are arranged side by side between the fixed seat (1) and the traction mechanism (4), the displacement detection mechanism (5) and the calculation unit (6) CONNECTIONS. 2. The device for detecting spring stiffness coefficients in batches according to claim 1, characterized in that: the displacement detection mechanism (5) includes a sliding rheostat, a resistance measurement unit and a processor, and the sliding rheostat includes a resistance wire and a multi- Each slider (3) is correspondingly connected to a slider, and the slider is against the resistance wire, and one end of the slider and the resistance wire is connected to a resistance measurement unit, and the resistance measurement unit is connected to the processor connected, the processor is connected with the calculation unit (6), and the processor calculates the displacement of the slider (3) according to the change of the resistance value measured by the resistance measurement unit. 3. The device for detecting spring stiffness coefficients in batches according to claim 1, characterized in that: the displacement detection mechanism (5) includes a scale grating (5a), a processor, and a plurality of scale gratings (5a) for reading ) grating reading head for scale data, the scale grating (5a) is set parallel to the linear guide rail (2), the grating reading head is connected to the slider (3) in one-to-one correspondence, and the processor and computing unit (6 ) connection, when the slider (3) moves, the processor calculates the displacement of the slider (3) according to the change of the scale data read by the grating reading head. 4. The device for detecting spring stiffness coefficients in batches according to claim 1, characterized in that: the displacement detection mechanism (5) includes a slide rail (5b) arranged parallel to the linear guide rail (2), a detection block (5c ), a photoelectric sensor, a processor, a laser displacement sensor for monitoring the position of the detection block (5c) and a driving mechanism for driving the detection block (5c) to slide on the slide rail (5b), the detection block (5c) and The sliding rail (5b) is slidingly connected, and the photoelectric sensor includes a transmitter and a receiver respectively installed on the slider (3) and the detection block (5c), the receiver is connected to a detection circuit, the detection circuit and the laser The displacement sensor is connected to the processor, and the processor is connected to the calculation unit (6). When the receiver receives the light signal from the transmitter, the processor will The position determines the position of the slider (3), and the processor calculates the displacement of the slider (3) according to the position change of the slider (3). 5. The device for detecting the spring stiffness coefficient in batches according to any one of claims 1-4, characterized in that it also includes a workbench (7), the fixed seat (1), the linear guide rail (2) , traction mechanism (4) are installed on the workbench (7). 6. The device for detecting spring stiffness coefficients in batches according to claim 5, characterized in that: the rear end surface of the fixed seat (1) and the front and rear end surfaces of the slider (3) are equipped with a Hold the loop for the spring to be tested. 7. The device for detecting spring stiffness coefficients in batches according to claim 6, characterized in that: the traction mechanism (4) includes an electric cylinder (4a), and the top end of the piston rod of the electric cylinder (4a) is provided with a Fasten the buckle of the hanging loop on the slider (3). 8. The device for detecting spring stiffness coefficients in batches according to claim 1, characterized in that: V-shaped grooves are opened on both side walls of the linear guide rail (2), and V-shaped grooves are provided on the slider (3) with The protrusion matching the V-shaped groove is provided with a plurality of linearly arranged balls on the protrusion, and the balls are against the inner wall of the V-shaped groove.