CN205749702U - A kind of system test device of Small-power Inverter - Google Patents

Abstract

The utility model discloses a whole machine testing device for a low-power frequency converter, which comprises a support frame, a cam mechanism, a carrier plate, a pressure plate, and a guide shaft for the pressure plate; the front end of the support frame is open; The place where the frequency converter is suitable for testing; there are multiple guide shafts for the pressure plate, which are vertically arranged in the support frame, and the two ends are respectively connected to the upper and lower ends of the support frame; the pressure plate is set on the guide shaft of the pressure plate so that it can move up and down; The cam mechanism is rotatably arranged at the upper end inside the supporting frame, and the lower end of the cam mechanism is in conflict with the pressure plate; the lower end of the pressure plate is provided with a probe set; the supporting frame is provided with a test circuit; the outer side of the supporting frame is provided with an aviation plug; The group is connected with the aviation plug through the test circuit. The testing device of the utility model effectively solves the problems of fast product installation and accurate positioning in the testing process of the frequency converter, and improves the production efficiency.

Description

A Whole Machine Test Device for Low Power Frequency Converter

technical field

The utility model relates to a test tool, in particular to a complete machine test device for a low-power frequency converter.

Background technique

The test device for the whole machine of the small power frequency converter currently in use includes a bottom plate, which is provided with a bracket for installing a travel wrench, and four upright guide shafts and springs are arranged on the bottom, and the pressure plate can be moved up and down. The movable part is arranged on the guide shaft; the stroke rail of the stroke wrench is fixed on the pressure plate to drive the pressure plate to move up and down; at least one set of probe sets connected with the test circuit is fixed on the pressure plate. When testing, place the product to be tested on the bottom plate, pull the travel wrench, connect the probe with the corresponding terminal of the product to be tested, and then start the test.

The above-mentioned test device has some inherent problems to solve: first, one end of the guide shaft in the test device is fixed on the base plate, and the other end is suspended in the air. The stability of the guide shaft is not good. The pressing plate is arranged on the guide shaft to move up and down. It is more difficult to align the probe group with the product terminal; secondly, only one end of the travel guide rail of the stroke wrench is fixed on the pressure plate, which drives the pressure plate to move up and down, and the stability is not good; thirdly, during the test, the product to be tested is placed on the bottom plate, It is necessary to adjust the position of the platen when it goes down, and it also interferes with the probe set when placing the product. The above three points lead to the failure of the test device to meet the requirements of fast product installation and accurate positioning.

Contents of the invention

The purpose of the utility model is to solve the defects existing in the prior art, and provide a frequency converter testing device capable of quickly installing products and accurately locating.

In order to achieve the above purpose, the utility model provides a whole machine test device for low-power inverters, including a support frame, a cam mechanism, a carrier plate, a pressure plate, and a guide shaft for the pressure plate; the front end opening of the support frame; the inner bottom of the support frame There is a placement area suitable for the inverter to be tested; there are multiple guide shafts for the pressure plate, which are vertically arranged in the support frame, and the two ends are respectively connected with the upper and lower ends of the support frame; the pressure plate can be moved up and down. On the guide shaft of the pressure plate; the cam mechanism is rotatably set at the upper end of the support frame, and the lower end of the cam mechanism is in conflict with the pressure plate; the lower end of the pressure plate is provided with a probe set; the support frame is equipped with a test circuit; Aviation plug; the probe set is connected to the aviation plug through the test circuit.

The whole machine testing device of the present utility model also includes a carrier plate; the carrier plate can be slid back and forth at the inner bottom of the support frame; the carrier plate is provided with a groove or a plurality of frequency converter limit blocks; the groove is the above-mentioned placement area, One or more frequency converter limit blocks enclose the above placement area.

A plurality of through holes are arranged on the pressing plate, and a plurality of guiding shafts of the pressing plate pass through the corresponding through holes; linear bearings are respectively provided at the assembly places of the pressing plate and the guiding shafts of the pressing plate; springs are respectively arranged on the guiding shafts of each pressing plate, and each spring Both are located between the pressing plate and the bottom of the supporting frame.

The cam mechanism is rotatably connected with the supporting frame body through a link mechanism.

Wherein, the connecting rod mechanism includes a connecting rod and a connecting rod handle; the connecting rod is rotatably arranged in the supporting frame through a rolling bearing, and one end extends out of the supporting frame and is fixedly connected with the connecting rod handle. The cam mechanism includes a cam block and a cam fixing block; the cam block is fixedly connected with the connecting rod of the link mechanism through the cam fixing block; and the cam mechanism conflicts with the pressing plate through the cam block. There are two cam blocks, which are fixedly connected with the connecting rod through corresponding cam fixing blocks respectively.

Slide rails are provided on both sides of the bottom end of the support frame; corresponding sliders are respectively provided on both sides of the lower end of the carrier plate, and the carrier plate is arranged on the bottom end of the support frame body by sliding along the slide rails through the sliders.

The above-mentioned support frame includes a cover plate, a bottom plate, a left support plate, a right support plate and a rear support plate; the slide rail is arranged on the bottom plate; Magnetic strips are arranged at corresponding positions of the front end.

The front end of the slide rail is provided with a front limit block.

Compared with the prior art, the utility model has the following advantages: the cover plate and the bottom plate are used to support the guide shaft of the pressure plate at the same time, which is more stable; at the same time, a spring is arranged between the pressure plate and the bottom plate to facilitate the reset of the pressure plate, and the placement area set at the bottom is convenient for frequency conversion The inverter is positioned, the installation is more convenient and accurate, and there is no need to adjust the position of the inverter. The frequency converter is placed on the sliding carrier board, which will not interfere with the probe set, and the assembly is more convenient. And the utility model utilizes the connecting rod mechanism to drive the cam mechanism to move up and down the pressing plate, which is more accurate and stable. The testing device of the utility model effectively solves the problems of fast product installation and accurate positioning in the testing process of the frequency converter, and improves the production efficiency.

Description of drawings

Fig. 1 is the structural exploded view of the whole machine test device of the low-power frequency converter of the present invention;

Fig. 2 is the rear view of the complete machine testing device in Fig. 1;

Fig. 3 is the structural representation of pressing plate in Fig. 1;

Fig. 4 is the bottom view of pressing plate in Fig. 3;

Fig. 5 is the connection schematic diagram of the cam mechanism and the connecting rod mechanism of the utility model testing device;

Fig. 6 is a schematic structural view of the fixed block of the connecting mechanism in Fig. 5;

Fig. 7 is the structural representation of the cam mechanism and the pressing plate of the utility model test device;

Fig. 8 is a motion state diagram of the cam block of the testing device of the present invention;

Fig. 9 is a schematic structural view of the carrier plate in Fig. 1;

FIG. 10 is a rear view of the carrier in FIG. 9 .

In the figure, 1-cover plate, 2-bottom plate, 3-left support plate, 4-right support plate, 5-rear support plate, 6-pressure plate, 7-carrier plate, 8-carrier plate handle, 9-cam block, 10-Cam fixed block, 11-Press plate guide shaft, 12-Spring, 13-Probe group, 14-Rolling bearing, 15-Front limit block, 16-Needle plate, 17-Linear bearing, 18-Slider, 19- Slide rail, 20-link mechanism fixing block, 21-connecting rod, 22-connecting rod handle, 23-handle fixing block, 24-aviation plug, 25-rear limit block, 26-frequency converter limit block, 27- magnet strip.

detailed description

The utility model is described in detail below in conjunction with accompanying drawing.

Referring to Fig. 1 to Fig. 10, the inverter test device of the present utility model includes a support frame assembled from a cover plate 1, a bottom plate 2, a left support plate 3, a right support plate 4, a rear support plate 5, a pressure plate 6, and two sets of cams Cam mechanism, connecting rod mechanism, carrier plate 7 and linear sliding mechanism that block 9 forms. Wherein, the pressure plate 6 is arranged in the support frame by moving in a vertical direction parallel to the plane where the cover plate 1 and the bottom plate 2 are located. The specific implementation method is: four linear bearings 17 are embedded on the pressure plate 6, Four platen guide shafts 11 matching the linear bearings 17 are fixed at corresponding positions between the bottom plate 2 (the platen guide shafts 11 are not limited to four, but no less than three are required to guide the platen 6 stably), A spring 12 for support is provided on the guide shaft 11 of the press plate, and the guide shaft 11 of the press plate is respectively assembled into the linear bearing 17 at the corresponding position. The assembly of the body makes the pressing plate 6 move linearly back and forth within a limited stroke along the direction of the guiding shaft 11 of the pressing plate. As mentioned above, the number of linear bearings 17 and pressure plate guide shafts 11 is not limited to 4, but not less than 3, and the assembly of the pressure plate 6 and the support frame is realized through the pressure plate guide shaft 11, spring 12 and linear bearing 17 . Referring to Fig. 3 and Fig. 4, the selected linear bearing 17 is a flange-type linear bearing to facilitate its embedding on the pressure plate 6.

As shown in FIG. 3 , one or more needle boards 16 are fixedly arranged under the pressing plate 6 , each of which is provided with probe sets 13 for testing, and the probe sets 13 are connected to the test circuit. 2, the test circuit connected to the probe set 13 is installed on the aviation plug 24 located on the back plate support plate 5, and the control circuit and the main circuit must be separated and connected to different aviation plugs 24 respectively.

5 to 7, the link mechanism includes a connecting rod 21, a link mechanism fixing block 20, a link handle 22 and a handle fixing block 23; Rolling bearing 14, as shown in Figure 6, this link mechanism fixed block 20 is respectively installed on the inner side upper part of left supporting plate 3, right supporting plate 4, and is positioned at pressing plate 6 top; Connecting rod 21 is packed in rolling bearing 14, realizes connecting rod 21 turns. And the connecting rod 21 installed in the rolling bearing 14, one end does not pass through the left support plate 3, and the other end passes through the right support plate 4, and stretches out a certain distance; the handle fixing block 23 is fixed on the right support plate 4. On the connecting rod 21 passing through, the connecting rod handle 22 is fixed on the handle fixing block 23 perpendicular to the direction of the connecting rod 21; the assembly of the connecting rod mechanism and the supporting frame is realized, so that the connecting rod 21 takes itself as the axis turn. The two cam blocks 9 are each fixed on the connecting rod 21 through the corresponding cam fixing block 10 , realizing the assembly of the cam mechanism and making the cam mechanism follow the rotation of the connecting rod 21 . The number setting of the aforementioned cam blocks 9 can be changed, but preferably not less than 2.

As shown in Figure 8, the cam mechanism only reciprocates between state 1 and state 2, from state 1 to state 2 by rotating 90 degrees counterclockwise, and then rotating 90 degrees clockwise to state 1, so reciprocating switching; the pressure plate 6 is set on The bottom of the cam 9 of the cam mechanism. When the cam mechanism is placed in state 1, the pressing plate 6 is at the topmost end of the stroke along the direction of the guide shaft 11. When the cam mechanism is placed in state 2, the pressing plate 6 is in its position along the direction of the guide shaft 11 of the pressing plate. When the cam mechanism returns to state 1 at the bottom end of the limited stroke, the pressure plate 6 is again at the topmost end of the limited stroke along the direction of the pressure plate guide shaft 11; the pressure plate 6 is within the limited stroke along the direction of the pressure plate guide shaft 11 For reciprocating linear motion, since two groups of cam blocks 9 are transported at the same time, the entire pressing plate 6 is fast and stable in the movement process, and the pressure is balanced.

Referring to Fig. 9 and Fig. 10, two groups of sliders 18 are respectively provided at the lower end of the carrier board 7, which are arranged on two sides. The two slide rails 19 are respectively fixed on the upper surface of the bottom plate 2 in parallel, and the rail shafts of the slide rails 19 are respectively loaded into two sets of sliders 18, realizing the composition of the linear sliding mechanism, so that the slider 18 can move along the slide rails. The 19 rail axis directions are linearly moved within the limited stroke. In order to limit the sliding block 18 from the slide rail 9 when withdrawing, the front end of the slide rail 9 is also fixedly provided with a front stopper 15. Four frequency converter fixing blocks 26 for placing the tested product are arranged at corresponding positions on the top of the carrier board 7 . At the upper surface of the base plate 2 and between the two slide rails 19, a rear limiting block 25 is provided, and the front end side of the rear limiting block 25 is provided with a magnet bar 27, and the rear side of the carrier plate 7 corresponds to the rear limiting block 25. A magnet bar 27 is also provided at the position of the magnet bar. When the carrier plate 7 slides to the innermost end of its stroke and touches the rear limit block 25, the two magnet bars 27 are mutually attracted and fixed, and the carrier plate 7 is positioned stably and reliably. At this time, the probe set 13 is located directly above the position of each terminal of the frequency converter; the requirements of stable movement of the carrier plate 7 and accurate and reliable positioning of the product to be tested are realized.

Referring to Fig. 1 to Fig. 10, the operation process of using the utility model to carry out the test of the low-power frequency converter is described below: test preparation, the joints of the external control circuit and the main circuit should be respectively connected to the corresponding aviation plug 24, so as to realize the test device and Connect the external test circuit; put the cam mechanism in state 1, so that the pressure plate 6 is at the top of its stroke; pull out the carrier plate 7 to the outermost end of its stroke; during the test, manually place the frequency converter to be tested on the carrier plate There are 26 space between the 4 frequency converter limit blocks on 7 (the matching groove can also be provided directly on the carrier plate 7, and the frequency converter can be positioned by using the groove), and then the carrier plate 7 is pushed to the innermost end of its stroke Connected with the rear limit block 25, the frequency converter to be tested is sent to the test position; the connecting rod handle 22 is turned to change the cam mechanism from state 1 to state 2, so that the pressure plate 6 goes down to the bottom end of its stroke, and the probe group 13 In close contact with the corresponding terminal of the inverter to be tested, the power test can be performed at this time; after the test is completed, pull up the connecting rod handle 22, and turn the cam mechanism from state 2 to state 1, so that the pressure plate 6 goes up to the top of its stroke , disconnect the contact between the probe set 13 and the corresponding terminal of the frequency converter to be tested, pull out the carrier board 7 to the outermost end of its stroke, and take out the tested product. All test steps are completed.

In summary, the utility model adopts a cam mechanism and a connecting rod mechanism as the mechanism for controlling the movement of the pressing plate, and a linear sliding mechanism as the carrying mechanism of the carrier plate. Balanced, the movement of its carrying mechanism is stable, and its positioning is accurate and reliable. This embodiment is also applicable to frequency converters of the same type and different manufacturers, and the function can be realized by changing the probe set and its position, and determining the product testing position.

The above embodiments only set forth the basic principles and characteristics of the utility model. The utility model is not limited by the above examples. On the premise of not departing from the spirit and scope of the utility model, the utility model also has various changes and changes. These changes All changes and modifications fall within the scope of the claimed utility model.

Claims (10)

1. A complete machine test device for a low-power frequency converter, characterized in that: it includes a support frame, a cam mechanism, a press plate, and a guide shaft for the press plate; the front end of the support frame is open; the inner bottom of the support frame is provided with A placement area that is compatible with the frequency converter to be tested; the guide shafts of the pressure plate are multiple, vertically arranged in the support frame, and the two ends are respectively connected to the upper and lower ends of the support frame; the pressure plate can move up and down set on the guide shaft of the pressing plate; the cam mechanism is rotatably arranged at the upper end inside the supporting frame, and the lower end of the cam mechanism is in conflict with the pressing plate; the lower end of the pressing plate is provided with a probe set; A test circuit is provided; an aviation plug is provided outside the supporting frame; the probe set is connected with the aviation plug through the test circuit. 2. The complete machine test device according to claim 1, characterized in that: the complete machine test device also includes a carrier plate; There is a groove or a plurality of frequency converter limit blocks; the groove is the placement area, or a plurality of frequency converter limit blocks enclose the placement area. 3. The complete machine testing device according to claim 2, characterized in that: said press plate is provided with a plurality of through holes, and a plurality of press plate guide shafts respectively pass through each corresponding through hole; said press plate and press plate guide shaft Linear bearings are respectively provided at the assembling places of each; springs are respectively provided on the guide shafts of each pressing plate, and each spring is located between the pressing plate and the bottom of the supporting frame. 4 . The whole machine testing device according to claim 3 , wherein the cam mechanism is rotatably connected to the support frame through a link mechanism. 5. The complete machine testing device according to claim 4, characterized in that: the linkage mechanism includes a linkage and a linkage handle; the linkage is arranged in the support frame through rolling bearing rotation, and one end protrudes The outside of the supporting frame is fixedly connected with the connecting rod handle. 6. The whole machine testing device according to claim 5, characterized in that: the cam mechanism comprises a cam block and a cam fixing block; the cam block is fixedly connected with the connecting rod of the linkage mechanism through the cam fixing block; The cam mechanism is in conflict with the pressing plate through a cam block. 7 . The whole machine testing device according to claim 6 , wherein there are two cam blocks, which are respectively fixedly connected to the connecting rod through corresponding cam fixing blocks. 8 . 8. The whole machine testing device according to claim 3, characterized in that: slide rails are respectively provided on both sides of the bottom end of the support frame; corresponding sliders are respectively provided on both sides of the lower end of the carrier board, and the The carrier plate is slidably arranged on the bottom end of the support frame through the slider along the slide rail. 9. The complete machine testing device according to claim 8, characterized in that: the supporting frame includes a cover plate, a bottom plate, a left support plate, a right support plate and a rear support plate; the slide rail is arranged on the bottom plate above; the rear side of the upper end of the bottom plate is provided with a rear limit block; the corresponding position between the rear side of the carrier plate and the front end of the rear limit block is provided with a magnet bar. 10 . The whole machine testing device according to claim 8 , wherein a front limit block is provided at the front end of the slide rail. 11 .