CN213122200U - Needle disc driving device for circuit board test - Google Patents
Needle disc driving device for circuit board test Download PDFInfo
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- CN213122200U CN213122200U CN202022105169.7U CN202022105169U CN213122200U CN 213122200 U CN213122200 U CN 213122200U CN 202022105169 U CN202022105169 U CN 202022105169U CN 213122200 U CN213122200 U CN 213122200U
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- dial
- circuit board
- switch piece
- motor
- driving device
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Abstract
The utility model discloses a dial driving device for testing circuit boards, which is positioned on one side of a dial of a testing tool and comprises an installation part and a pair of base plates, wherein the base plates are respectively arranged on the left side and the right side of the dial; the power source is a motor arranged on the substrate; each driving component comprises a rotating shaft which is arranged between the base plates and is driven by the motor to periodically rotate in the positive direction and the negative direction, and at least one driving wheel which is eccentrically fixed on the rotating shaft and is used for contacting with the dial and driving the dial to periodically lift. The utility model discloses simple structure, atress are even, reliable and stable, have reduced the motor drive source cost, have solved that current actuating mechanism structure is complicated, the signal control degree of difficulty is big and the high scheduling problem of cost input.
Description
Technical Field
The utility model belongs to the technical field of circuit board test frock technique and specifically relates to a dial drive device is used in circuit board test.
Background
When some circuit board detection tools are used, the dial needs to move up and down to realize the contact of the circuit board test points. In order to ensure that the tested circuit board and the testing needle are stressed uniformly, reduce the error detection rate and improve the product quality, a stable and reliable power source is required to be used for driving the dial to move. At present, an air cylinder or a motor is mostly adopted as a driving source. The air cylinder directly drives the dial to move, and the air source is required to have a larger pressure range due to large load fluctuation, and the defects of unbalanced power transmission, low transmission efficiency, difficult obtainment of large moment, larger exhaust noise and the like exist; when the needle dial is used as a driving source, a screw motor or a gear is usually used for matching with a guide rail to drive the needle dial, and the mode has the defects of complex structure, high quality requirement on the screw motor, high electric signal control difficulty, high investment cost and the like, and is required to be matched with an upper computer for use.
Disclosure of Invention
In order to solve the above problem, the utility model provides a dial drive device is used in circuit board test specifically can take following technical scheme:
circuit board test use dial drive arrangement, drive arrangement sets up dial one side at test fixture, include
A mounting part having a pair of substrates respectively disposed at left and right sides of the dial;
the power source is a motor arranged on the substrate;
at least one drive assembly, each said drive assembly comprising
The rotating shaft is arranged between the substrates and is driven by the motor to periodically rotate forwards and backwards;
and the transmission wheel is eccentrically fixed on the rotating shaft and is used for contacting with the dial and driving the dial to periodically lift.
The two sets of driving assemblies are arranged, the rotating shafts are respectively arranged at the top and the bottom of the dial, and the two rotating shafts synchronously run under the driving of the motor through a synchronous belt transmission mechanism or a gear transmission mechanism.
The transmission wheels have the same structure, and each rotating shaft is provided with two transmission wheels.
And one side of the rotating shaft is provided with a ball guide post.
And a spring thimble used for positioning the dial is arranged on the test tool.
The motor is a speed reducing motor or a stepping motor.
The driving device also comprises a motor stalling trigger mechanism which comprises
A first switching member disposed outside the substrate;
the second switch piece is arranged in pair with the first switch piece and is positioned outside the same substrate as the first switch piece;
the trigger is provided with a synchronous rotating arm arranged at the end part of the rotating shaft, and the synchronous rotating arm is positioned between the first switch piece and the second switch piece and is used for triggering the first switch piece and the second switch piece.
The first switch piece and the second switch piece are both microswitches.
The first switch piece and the second switch piece are both photoelectric sensors.
The dial driving device for the circuit board test has simple structure, uniform stress, stability and reliability; the driving wheel which is eccentrically arranged is driven by the motor to periodically rotate forward and backward, so that the dial which is in friction connection with the driving wheel can move up and down, and meanwhile, the motor can be controlled by starting and stopping small current, so that the cost of a motor driving source is reduced, and the problems of complex structure, high signal control difficulty, high cost investment and the like of the existing driving mechanism are solved.
Drawings
Fig. 1 and 2 are schematic structural diagrams of the present invention.
Fig. 3 is a block diagram of the control principle of the circuit of fig. 1.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, dial drive device is used in circuit board test set up in dial one side of test fixture, including an installation department, a power supply and at least one drive assembly, further, in order to realize the power supply and open the automated control who stops, above-mentioned drive device still includes a motor stall trigger mechanism.
Specifically, the mounting portion has a pair of base plates 1 fixed to the left and right sides of the dial, respectively, and the power source is a motor 2 mounted on one of the base plates 1, which is usually a reduction motor or a stepping motor, and performs periodic forward rotation and reverse rotation under the control of the PLC. Each driving component comprises a rotating shaft 3.1 arranged between the two base plates 1, and two eccentrically fixed driving wheels 3.2 are arranged on the rotating shaft 3.1. The two driving wheels 3.2 have the same structure and size and are consistent in installation angle. The two sets of driving components are provided, the two rotating shafts 3.1 are respectively positioned at the top and the bottom of the dial and are connected with the motor 2 through a synchronous belt transmission mechanism or a gear transmission mechanism, and when the motor 2 is started, the two rotating shafts 3.1 run synchronously; when the motor 2 is switched off, the two shafts 3.1 are synchronously stopped. The transmission wheel 3.2 can be in friction connection with the dial, so that the dial can be stably driven to periodically lift. In order to prevent the rotating shaft 3.1 from deviating in the rotating process, the two rotating shafts 3.1 are provided with a ball guide post 4 which is positioned on one side of the rotating shaft 3.1 and is in contact with the rotating shaft 3.1 on the testing tool. In addition, a spring thimble 5 is installed on the test tool, correspondingly, a through hole matched with the spring thimble 5 is formed in the dial, and when the dial is at the highest position, the spring thimble 5 extends out of the through hole to position the dial.
The motor stalling trigger mechanism comprises a first switch piece positioned on the outer side of the substrate 1 and a second switch piece which is arranged in pair with the first switch piece and is positioned on the outer side of the same substrate 1 with the first switch piece; and the trigger is provided with a synchronous rotating arm arranged at the end part of the rotating shaft 3.1, and the synchronous rotating arm is positioned between the first switch piece and the second switch piece and is used for triggering the first switch piece and the second switch piece.
Specifically, the following two forms can be adopted.
As shown in fig. 2, the first type is composed of a first microswitch 6.1, a second microswitch 6.2 and a trigger 6.3, wherein, the first microswitch 6.1 and the second microswitch 6.2 are both arranged at the outer side of the base plate 1 at the side opposite to the motor 2, the trigger 6.3 is arranged at the end part of one rotating shaft 3.1 and is provided with a synchronous rotating arm 6.4 which runs synchronously with the rotating shaft 3.1, the synchronous rotating arm 6.4 is arranged between the first microswitch 6.1 and the second microswitch 6.2, when the dial reaches the highest point, the first microswitch 6.1 can be triggered to stop the motor 2; when the dial is at its lowest point, the second microswitch 6.2 can be triggered, stopping the motor 2.
The second one is similar to the first one, in that the first microswitch 6.1 is replaced by a first photoelectric sensor and the second microswitch 6.2 is replaced by a second photoelectric sensor.
The operation of the present invention will be described below by taking the first motor stall triggering mechanism as an example.
As shown in fig. 3, when a test is started, the circuit board to be tested is firstly placed in the test fixture, then the PLC module sends a command to start the motor 2 to work, the rotating shaft 3.1 rotates, the driving wheel 3.2 drives the dial to move upwards, when the highest point is reached (detection position), the synchronous rotating arm 6.4 at the end of the rotating shaft 3.1 triggers the first microswitch 6.1, a signal is transmitted to the PLC to stop the motor 2, and at this time, the circuit board detection is started. When the circuit board detection is finished, the PLC receives a finished signal, sends a command again to enable the motor 2 to work, at the moment, the dial moves downwards, when the lowest point is reached, the synchronous rotating arm 6.4 triggers the second microswitch 6.2, a signal is transmitted to the PLC, the motor 2 is commanded to stop working, and then the detection module is powered off, and the circuit board to be detected is taken out.
It should be noted that in the description of the present invention, terms of orientation or positional relationship such as "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (9)
1. The utility model provides a dial drive arrangement is used in circuit board test, drive arrangement sets up in dial one side of test fixture, its characterized in that: comprises that
A mounting part having a pair of substrates respectively disposed at left and right sides of the dial;
the power source is a motor arranged on the substrate;
at least one drive assembly, each said drive assembly comprising
The rotating shaft is arranged between the substrates and is driven by the motor to periodically rotate forwards and backwards;
and the transmission wheel is eccentrically fixed on the rotating shaft and is used for contacting with the dial and driving the dial to periodically lift.
2. The dial driving device for circuit board testing according to claim 1, wherein: the two sets of driving assemblies are arranged, the rotating shafts are respectively arranged at the top and the bottom of the dial, and the two rotating shafts synchronously run under the driving of the motor through a synchronous belt transmission mechanism or a gear transmission mechanism.
3. The dial driving device for circuit board testing according to claim 2, wherein: the transmission wheels have the same structure, and each rotating shaft is provided with two transmission wheels.
4. The dial driving device for circuit board testing according to claim 1, wherein: and one side of the rotating shaft is provided with a ball guide post.
5. The dial driving device for circuit board testing according to claim 1, wherein: and a spring thimble used for positioning the dial is arranged on the test tool.
6. The dial driving device for circuit board testing according to claim 1, wherein: the motor is a speed reducing motor or a stepping motor.
7. The dial driving device for circuit board testing according to claim 1, wherein: the driving device also comprises a motor stalling trigger mechanism which comprises
A first switching member disposed outside the substrate;
the second switch piece is arranged in pair with the first switch piece and is positioned outside the same substrate as the first switch piece;
the trigger is provided with a synchronous rotating arm arranged at the end part of the rotating shaft, and the synchronous rotating arm is positioned between the first switch piece and the second switch piece and is used for triggering the first switch piece and the second switch piece.
8. The dial driving device for circuit board testing according to claim 7, wherein: the first switch piece and the second switch piece are both microswitches.
9. The dial driving device for circuit board testing according to claim 7, wherein: the first switch piece and the second switch piece are both photoelectric sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022105169.7U CN213122200U (en) | 2020-09-23 | 2020-09-23 | Needle disc driving device for circuit board test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022105169.7U CN213122200U (en) | 2020-09-23 | 2020-09-23 | Needle disc driving device for circuit board test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213122200U true CN213122200U (en) | 2021-05-04 |
Family
ID=75664456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022105169.7U Active CN213122200U (en) | 2020-09-23 | 2020-09-23 | Needle disc driving device for circuit board test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213122200U (en) |
-
2020
- 2020-09-23 CN CN202022105169.7U patent/CN213122200U/en active Active
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