CN111521932A

CN111521932A - Rotary switch test fixture

Info

Publication number: CN111521932A
Application number: CN202010443760.5A
Authority: CN
Inventors: 周志峰; 李晨晨; 方宇; 吴明晖
Original assignee: Shanghai University of Engineering Science
Current assignee: Shanghai University of Engineering Science
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-08-11
Anticipated expiration: 2040-05-22
Also published as: CN111521932B

Abstract

The invention relates to a rotary switch test fixture, comprising: the switch mounting seat is used for mounting a rotary switch to be tested; the fixture comprises two fixture main bodies and a clamping sliding table, wherein the clamping sliding table is used for driving the two fixture main bodies to mutually approach to connect an upper contact of a rotary switch; the clamp main body is a semi-annular clamping block and comprises a semi-annular rack and a semi-annular wiring frame, the semi-annular wiring frame comprises a semi-annular inner sleeve arranged on the inner ring of the semi-annular rack, a plurality of metal sheets arranged on the inner side of the semi-annular inner sleeve and towards the circle center, a plurality of lead posts arranged on the outer side of the semi-annular inner sleeve and deviating from the circle center, the number of the lead posts is consistent with that of the metal sheets, the lead posts correspond to the metal sheets one by one, and each metal sheet is connected with the corresponding lead post through a wire. Compared with the prior art, the invention can avoid the situation that the same probe contacts a plurality of contacts or the probe cannot contact the metal contacts when the rotary switch with a large number of metal contacts and a large assembly tolerance is tested.

Description

Rotary switch test fixture

Technical Field

The invention relates to the field of switch test fixtures, in particular to a rotary switch test fixture.

Background

Switches are components used to connect, switch and disconnect signals and power transmission between components, circuits, equipment, and are widely used in the aerospace, military, transportation, and general industrial or civilian fields. The rotary change-over switch is an important component of an aerospace system, and the reliability and stability of the rotary change-over switch directly influence the operation of the whole equipment, even influence the stable operation of the whole aerospace flight system.

Rotary switches must be subjected to performance testing in mass production. At present, mechanical pressing type switch on-off test equipment is multiple, but a few rotary switch instruments exist, when a large problem is met when the rotary switch is measured, due to the fact that the rotary switch is small in size, multiple in metal contacts and large in assembly error of switches in the same batch, no good clamp can be used for leading out the metal contacts of the rotary switch to achieve high-efficiency testing, existing testing conditions mainly depend on manpower to enable the test instrument to be connected with the rotary switch through leads, dozens of leads need to be connected in the mode every time the rotary switch is measured, and measuring efficiency is extremely low.

Chinese patent CN108760254A discloses a testing device for a change-over switch, which can be used to measure a rotary switch, and comprises a measurement and control box, a testing platform, a push rod clamp, a testing pin base for mounting a testing pin, a switch positioning seat and a switch positioning cover, wherein the measurement and control box is mounted on the testing platform to control and display the testing of the switch, the switch positioning seat is mounted above the testing platform, the switch positioning seat is matched with a replaceable switch positioning cover to position the switch, the testing pin base is relatively arranged on two sides of the switch positioning seat and movably mounted on the testing platform, the two sets of push rod clamps are relatively arranged on two sides of the switch positioning seat, the two testing pin bases are respectively connected with the two sets of push rod clamps and push the testing pin to contact and conduct the switch by the push rod clamps to move along the lateral direction of the switch positioning seat, but in the implementation of the above scheme, if the, it is easy to cause the same probe to contact a plurality of contacts or the probe cannot contact a metal contact.

Disclosure of Invention

The invention aims to provide a rotary switch test fixture, which aims to solve the problems that in the prior art, due to the fact that all probes are installed in parallel in the horizontal direction or other directions, the same probe contacts a plurality of contacts, and due to the existence of assembly tolerance, the metal contacts deviate, and the probes cannot contact the metal contacts.

The purpose of the invention can be realized by the following technical scheme:

a rotary switch test fixture, comprising:

the switch mounting seat is used for mounting a rotary switch to be tested;

the fixture comprises two fixture main bodies and a clamping sliding table, wherein the clamping sliding table is used for driving the two fixture main bodies to mutually approach to connect an upper contact of a rotary switch;

the anchor clamps main part is the semicircular clamping block, including semicircular frame and semicircular wiring frame, semicircular wiring frame just faces a plurality of sheetmetals that the centre of a circle set up, is located on the semicircular endotheca outside and deviates from a plurality of pin posts that the centre of a circle set up including the semicircular endotheca of locating semicircular frame inner circle, locating on the semicircular endotheca inboard, the quantity of pin post and the quantity of sheetmetal unanimity and the one-to-one, each sheetmetal passes through the wire and corresponds the pin post and be connected.

Another aspect of the present invention is to improve the stability of the contact connection between the metal sheet and the rotary switch during the test, and this object is achieved by the following arrangement:

the lead post comprises a spring and a metal screw cap, the metal screw cap is installed on the outer side of the semi-annular rack through threads, one end of the spring is in contact with a corresponding metal sheet, and the other end of the spring is inserted into the semi-annular rack from the inner side of the semi-annular inner sleeve and is supported by the semi-annular rack.

The diameter of the arc formed by one end of each metal sheet close to the circle center is smaller than that of the arc formed by one end of the upper contact of the rotary switch far away from the circle center.

The width of one end of each metal sheet close to the circle center is larger than that of one end of the rotary switch, which is far away from the circle center.

A final aspect of the present invention is to provide a driving manner for the clamp body, and the purpose is achieved by the following design:

the clamping slide table comprises:

the sliding table rack comprises a bottom plate and mounting tables arranged on the same side of two ends of the bottom plate, wherein a first bearing is arranged in one mounting table, and a second bearing is arranged in the other mounting table;

the hand-operated lever is connected and matched with the first bearing;

one end of the bidirectional screw rod is connected with the hand rocker through the coupler, and the other end of the bidirectional screw rod is connected and matched with the second bearing;

and the two linear bearings are respectively arranged on the left-handed section and the right-handed section of the bidirectional screw rod and are respectively used for fixing the two clamp bodies.

The clamping sliding table further comprises two optical shafts which are respectively located on two sides of the bidirectional screw rod, the two optical shafts equally divide and respectively penetrate through the two linear bearings, and two ends of the two optical shafts are equally divided and respectively fixed by the two mounting tables.

The hand rocker is in interference fit with the first bearing.

And the bidirectional screw rod is in interference fit with the second bearing.

The connecting piece is equipped with two altogether, is used for installing two anchor clamps main parts respectively, the connecting piece includes:

the connecting block is arranged on the linear bearing;

and the two connecting plates are respectively arranged on two sides of the connecting block and used for fixing the corresponding clamp main bodies.

The switch mounting seat is mounted in the center of the bottom plate of the sliding table rack.

Compared with the prior art, the invention has the following beneficial effects:

1) through designing the semi-annular clamp splice, arrange towards the centre of a circle with the sheetmetal design to can be in metal contact quantity, during the rotary switch test that assembly tolerance is big, avoid taking place same probe and contact a plurality of contacts, perhaps the probe can't contact the condition of metal contact.

2) The structure of the spring is adopted, the diameter of the arc formed by one end, close to the circle center, of each metal sheet is smaller than that of the arc formed by one end, far away from the circle center, of the contact on the rotary switch, the spring is always in a compression state, the width of one end, close to the circle center, of each metal sheet is larger than that of one end, far away from the circle center, of the contact on the rotary switch, and the stability of connection between the metal sheets and the contact on the rotary switch in a test process can be improved.

3) Based on two-way lead screw, can realize the syntropy motion of two anchor clamps main parts.

4) The stability that two-way lead screw removed can be improved in the setting of two optical axes.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic structural view of a clamping slide;

FIG. 3 is an isometric view of the present invention;

FIG. 4 is a schematic structural view of the clamp body;

FIG. 5 is a schematic structural view of a semi-annular junction box;

FIG. 6 is a schematic view of a rotary switch;

FIG. 7 is a schematic structural view of the present invention without the rotary switch;

FIG. 8 is a schematic front view of the rotary switch of the present invention;

FIG. 9 is a schematic top view of the rotary switch of the present invention;

FIG. 10 is a schematic view of the back side of the rotary switch of the present invention;

wherein: 1. the clamping sliding table comprises a clamping sliding table body, 2, a connecting piece, 3, a first clamp body, 4, a second clamp body, 5, a switch mounting seat, 6, a sliding table frame, 7, a first optical axis, 8, a second linear bearing, 9, a second optical axis, 10, a first linear bearing, 11, a bidirectional screw rod, 12, a coupler, 13, a hand lever, 14, a first bearing, 15, a second bearing, 16, a first connecting plate, 17, a second connecting plate, 18, a third connecting plate, 19, a fourth connecting plate, 20, a first connecting block, 21, a second connecting block, 22, a semi-annular frame, 23, a semi-annular inner sleeve, 24, a metal screw cap, 25, a spring, 26 and a metal sheet.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

A rotary switch test fixture, as shown in fig. 1 and 2, comprising:

a switch mounting base 5 for mounting a rotary switch to be tested, wherein the structure of the rotary switch is shown in fig. 6;

the fixture comprises two fixture main bodies and a clamping sliding table 1 for driving the two fixture main bodies to mutually approach to connect with an upper contact of a rotary switch, wherein the fixture main bodies are connected with the clamping sliding table 1 through connecting pieces 2;

as shown in fig. 4 and 5, the two fixture main bodies are the first fixture main body 3 and the second fixture main body 5 respectively, the structure is the same, the fixture main body is a semi-annular clamping block, including the semi-annular frame 22 and the semi-annular wiring frame, the semi-annular wiring frame includes the semi-annular inner sleeve 23 arranged in the inner ring of the semi-annular frame 22, a plurality of metal sheets 26 arranged on the inner side of the semi-annular inner sleeve 23 and towards the center of a circle, a plurality of lead posts arranged on the outer side of the semi-annular inner sleeve 23 and deviating from the center of a circle, the number of the lead posts is consistent with that of the metal sheets 26 and corresponds to one another, and each metal sheet 26 is connected with the corresponding lead post. Wherein, the semi-annular frame 22 is provided with through holes in the radial direction, the number of the through holes is determined according to the number of the contacts of the tested rotary switch, each through hole is provided with a metal screw cap 24, a spring 25 and a metal sheet 26, and the metal sheet and the metal screw cap are connected by a lead; through designing the semi-annular clamp splice, arrange towards the centre of a circle with the sheetmetal design to can be in metal contact quantity, during the rotary switch test that assembly tolerance is big, avoid taking place same probe and contact a plurality of contacts, perhaps the probe can't contact the condition of metal contact.

The lead post includes a spring 25 and a metal screw cap 24, the metal screw cap 24 is installed outside the semi-ring frame 22 through screw threads, one end of the spring 25 is in contact with a corresponding metal sheet 26, and the other end is inserted into the semi-ring frame 22 from the inside of the semi-ring inner sleeve 23 and supported by the semi-ring frame 22. Specifically, in this embodiment, the semi-annular inner sleeve 23 is mounted on the inner axial surface of the clamping block frame through the metal sheet 26 and is tightly attached to the inner axial surface, and the metal screw cap 24 and the metal sheet 26 are connected through a wire. The diameter of the arc formed by one end of each metal sheet 26 close to the center of the circle is smaller than that of the arc formed by one end of the rotary switch contact far from the center of the circle. The width that each sheetmetal 26 is close to centre of a circle one end is greater than the width that the centre of a circle one end was kept away from to the rotary switch upper contact, can improve the stability that contact was connected on sheetmetal and the rotary switch in the test process, even rotary switch's metallic contact is more and have certain processing and assembly error, still can make the sheetmetal of anchor clamps and rotary switch's metallic contact stable, very big improvement rotary switch's efficiency of software testing.

As shown in fig. 2, the clamp slide 1 includes:

the sliding table rack 6 comprises a bottom plate and mounting tables arranged on the same side of two ends of the bottom plate, a first bearing 14 is arranged in one mounting table, a second bearing 15 is arranged in the other mounting table, and the first bearing 14 and the second bearing 15 are assembled in the mounting tables in an interference fit mode;

the hand-operated rod 13 is connected and matched with the first bearing 14, and the hand-operated rod 13 is in interference fit with the first bearing 14;

one end of the bidirectional lead screw 11 is connected with the hand rocker 13 through the coupler 12, the other end of the bidirectional lead screw is connected and matched with the second bearing 15, and the bidirectional lead screw 11 is in interference fit with the second bearing 15;

and the two linear bearings are respectively arranged on the left-handed section and the right-handed section of the bidirectional screw rod 11 and are respectively used for fixing the two clamp bodies.

The clamping sliding table 1 further comprises two optical axes respectively located on two sides of the bidirectional screw rod 11, as shown in fig. 2, the two optical axes are respectively a first optical axis 7 and a second optical axis 9, the two optical axes respectively penetrate through the two linear bearings, and two ends of the two optical axes are respectively fixed by the two mounting tables.

The two connecting pieces 2 are used for installing the two fixture main bodies respectively, specifically, as shown in fig. 2, the two linear bearings are a first linear bearing 10 and a second linear bearing 8 respectively, the first fixture main body 3 is fixed on the first linear bearing 10 through one of the connecting pieces 2, and the second fixture main body 5 is fixed on the second linear bearing 8 through the other connecting piece 2. The connector 2 includes: the connecting block is arranged on the linear bearing; and the two connecting plates are respectively arranged on two sides of the connecting block and used for fixing the corresponding clamp main bodies. The switch mounting base 5 is mounted in the center of the bottom plate of the slide table frame 6. Wherein first connecting piece 2 comprises first connecting block 20, first connecting plate 16 and second connecting plate 17, another connecting piece 2 comprises second connecting block 21, third connecting plate 18 and fourth connecting plate 19, first connecting block 20 passes through the bolt and installs on first linear bearing 10, first connecting plate 16 and second connecting plate 17 pass through the bolt and install in first connecting block 20 front and back side, second connecting block 21 passes through the bolt and installs on second linear bearing 8, third connecting plate 18 and fourth connecting plate 19 pass through the bolt and install in second connecting block 21 front and back side.

When the rotary switch test fixture related by the invention is used, the fixture is as shown in fig. 7, the rotary switch as shown in fig. 6 is firstly placed on the switch mounting seat and is fixed by the set screw, at the moment, the fixture state is as shown in fig. 8-10, after the rotary switch is mounted, the hand lever 13 is rotated, because one end of the bidirectional screw rod rotates leftwards and rightwards, the distance of the linear bearing is shortened after the hand lever 13 is fixed and rotated until the first fixture main body 3 is contacted with the second fixture main body 5, and at the moment, the metal sheet on the fixture is contacted with the metal contact, so that the purpose of clamping the switch is achieved.

Generally, the device has the advantages of simple structure, easiness in control, processing and transferring and low maintenance cost, and is suitable for a rotary switch testing instrument.

Claims

1. A rotary switch test fixture, comprising:

the switch mounting seat (5) is used for mounting a rotary switch to be tested;

the fixture comprises two fixture main bodies and a clamping sliding table (1) for driving the two fixture main bodies to mutually approach to connect with an upper contact of a rotary switch, wherein the fixture main bodies are connected with the clamping sliding table (1) through connecting pieces (2);

its characterized in that, the anchor clamps main part is the semicircular clamping block, including semicircular frame (22) and semicircular wiring frame, semicircular wiring frame is including semicircular endotheca (23) of locating semicircular frame (22) inner circle, locate a plurality of sheetmetals (26) that semicircular endotheca (23) inboard and set up towards the centre of a circle, be located on semicircular endotheca (23) outside and deviate from a plurality of pin posts that the centre of a circle set up, the quantity of pin post and the quantity of sheetmetal (26) are unanimous and the one-to-one, each sheetmetal (26) pass through the wire and correspond the pin post and be connected.

2. A rotary switch test fixture as claimed in claim 1, wherein the lead post comprises a spring (25) and a metal screw cap (24), the metal screw cap (24) is installed outside the semi-annular frame (22) through screw threads, one end of the spring (25) is in contact with a corresponding metal sheet (26), and the other end is inserted into the semi-annular frame (22) from inside the semi-annular inner sleeve (23) and supported by the semi-annular frame (22).

3. A rotary switch testing jig according to claim 1 or 2 wherein the diameter of the arc defined by the end of each metal sheet (26) adjacent the centre of the circle is less than the diameter of the arc defined by the end of the rotary switch where the contact is remote from the centre of the circle.

4. A rotary switch testing jig according to claim 1 or 2 wherein the width of each metal sheet (26) at the end near the centre of the circle is greater than the width of the rotary switch at the end of the contact remote from the centre of the circle.

5. A rotary switch test fixture according to claim 1, characterized in that the clamping ramp (1) comprises:

the sliding table rack (6) comprises a bottom plate and mounting tables arranged on the same side of two ends of the bottom plate, wherein a first bearing (14) is arranged in one mounting table, and a second bearing (15) is arranged in the other mounting table;

the hand-operated lever (13) is connected and matched with the first bearing (14);

one end of the bidirectional screw rod (11) is connected with the hand-operated rod (13) through the coupler (12), and the other end of the bidirectional screw rod is connected and matched with the second bearing (15);

and the two linear bearings are respectively arranged on the left-handed section and the right-handed section of the bidirectional screw rod (11) and are respectively used for fixing the two clamp bodies.

6. The rotary switch test fixture according to claim 5, wherein the clamping sliding table (1) further comprises two optical axes respectively located at two sides of the bidirectional screw (11), the two optical axes respectively penetrate through the two linear bearings, and the two ends are respectively fixed by the two mounting tables.

7. A rotary switch test fixture as claimed in claim 5, characterised in that the hand lever (13) is in interference fit with the first bearing (14).

8. A rotary switch test fixture as claimed in claim 5, characterised in that the bidirectional screw (11) is an interference fit with the second bearing (15).

9. A rotary switch test fixture according to claim 5, characterized in that said connecting members (2) are provided in two for mounting two fixture bodies, respectively, said connecting members (2) comprising:

the connecting block is arranged on the linear bearing;

10. A rotary switch test fixture as claimed in claim 5, characterized in that the switch mounting seat (5) is mounted in the center of the bottom plate of the slipway chassis (6).