CN111521932B - Rotary switch test fixture - Google Patents

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 two clamp bodies and the clamping sliding table are used for driving the two clamp bodies to be mutually close to be connected with the upper contact of the rotary switch, and the clamp bodies are connected with the clamping sliding table through the connecting piece; the clamp body is a semi-annular clamp splice and comprises a semi-annular rack and a semi-annular wiring frame, wherein 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 facing the circle center, and 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 the number of the metal sheets and corresponds to the number of 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 large assembly tolerance is tested.

Description

A 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 technique

Switches are components used to connect, switch and cut off components, circuits, and signal and power transmission between devices, and are widely used in aviation, aerospace, military, transportation, and general industrial or civil fields. The rotary switch is an important component of the aerospace system, its reliability and stability directly affect the operation of the entire equipment, and even affect the stable operation of the entire aerospace system.

In mass production, rotary switches must undergo performance testing. At present, there are many mechanical push-type switch on-off test equipment, but there are few rotary switch instruments. When measuring the rotary switch, it is a big problem. Because the rotary switch is small in size, has many metal contacts, and the same batch of switches is assembled The error is large, so there has been no good fixture that can lead out the metal contacts of the rotary switch to achieve high-efficiency testing. The existing test conditions mainly rely on manpower to connect the test instrument to the rotary switch through wires. Dozens of wires must be connected at one time, and the measurement efficiency is extremely low.

Chinese patent CN108760254A discloses a transfer switch test device, which can be used to measure rotary switches, including a measurement and control box, a test platform, a push rod fixture, a test needle base for installing a test needle, a switch positioning seat and a switch positioning cover. The measurement and control box is installed on The switch test is controlled and displayed on the test platform. The switch positioning seat is installed above the test platform. The switch positioning seat cooperates with the replaceable switch positioning cover to position the switch. The test needle base is relatively arranged on both sides of the switch positioning seat. , Removably installed on the test platform, two sets of push rod fixtures are relatively arranged on both sides of the switch positioning seat, the two test needle bases are respectively connected with the two sets of push rod fixtures, and pushed along the position of the switch positioning seat by the push rod fixture Lateral movement makes the test needle contact with the switch, but when the above solution is implemented, if the rotary switch has many contacts, it is easy for the same probe to touch multiple contacts, or the probe cannot touch the metal contact. .

Contents of the invention

The purpose of the present invention is to provide a rotary switch test fixture to solve the problems in the prior art that the same probe touches multiple contacts caused by the installation of all probes horizontally or in other directions parallel to each other and the existence of assembly tolerances. A problem where the contacts are deflected so that the probe cannot contact the metal contacts.

The purpose of the present invention can be achieved through the following technical solutions:

A rotary switch test fixture comprising:

Switch mount, used to install the rotary switch to be tested;

Two clamp bodies and a clamping slide for driving the two clamp bodies close to each other to connect contacts on the rotary switch, the clamp main bodies are connected to the clamp slide through a connecting piece;

The main body of the clamp is a semi-annular clamping block, which includes a semi-annular frame and a semi-annular wiring frame. And a plurality of metal sheets arranged towards the center of the circle, a plurality of lead posts located on the outer side of the semi-annular inner sleeve and set away from the center of the circle, the number of the lead posts is consistent with the number of the metal sheets and one-to-one correspondence, each metal sheet passes through the wire and the corresponding lead wire column connection.

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 testing process, and this purpose is achieved by the following design:

The lead column includes a spring and a metal screw cap, and the metal screw cap is installed on the outside of the semi-circular frame by threads, one end of the spring is in contact with the corresponding metal sheet, and the other end is inserted into the semi-circular frame from the inside of the semi-circular inner sleeve and Supported by a half-ring frame.

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

The width of each metal sheet near the center of the circle is greater than the width of the contact on the rotary switch away from the center of the circle.

The last aspect of the present invention is to provide a driving method for the clamp body, which is achieved by the following design:

The clamping slide includes:

The sliding platform frame includes a bottom plate and installation platforms arranged on the same side at both ends of the bottom plate, and one installation platform is provided with a first bearing, and the other installation platform is provided with a second bearing;

The hand rocker is connected and matched with the first bearing;

Two-way lead screw, one end is connected with the hand lever through a coupling, and the other end is connected with the second bearing;

Two linear bearings are installed on the left-handed section and the right-handed section of the two-way lead screw respectively, and are respectively used to fix the two fixture main bodies.

The clamping slide table also includes two optical axes respectively located on both sides of the two-way lead screw, the two optical axes respectively pass through two linear bearings, and both ends are respectively fixed by two installation platforms.

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

The two-way lead screw is in interference fit with the second bearing.

There are two connectors in total, which are respectively used to install the two clamp bodies. The connectors include:

Connecting block, installed on the linear bearing;

Two connecting plates are respectively installed on both sides of the connecting block for fixing the main body of the corresponding fixture.

The switch mounting base is installed in the center of the bottom plate of the slide frame.

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

1) By designing the semi-ring clamp block, the metal sheet is designed to be arranged towards the center of the circle, so that when testing a rotary switch with a large number of metal contacts and a large assembly tolerance, it is possible to avoid the occurrence of the same probe touching multiple contacts, or the probe A condition where metal contacts cannot be reached.

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

3) Based on the two-way screw, the same direction movement of the two fixture bodies can be realized.

4) The setting of two optical axes can improve the stability of the two-way screw rod movement.

Description of drawings

Fig. 1 is the schematic diagram of front view of the present invention;

Figure 2 is a schematic structural view of the clamping slide;

Fig. 3 is an axonometric view of the present invention;

Fig. 4 is the structural representation of clamp main body;

Fig. 5 is a structural schematic diagram of a semi-ring terminal block;

Fig. 6 is the schematic diagram of rotary switch;

Fig. 7 is a schematic structural view of the present invention when no rotary switch is loaded;

Fig. 8 is a schematic view of the front structure when the rotary switch is loaded in the present invention;

Fig. 9 is a schematic diagram of the top surface structure when the rotary switch is loaded in the present invention;

Fig. 10 is a schematic diagram of the back structure of the present invention when the rotary switch is loaded;

Among them: 1. Clamping slide table, 2. Connecting piece, 3. First fixture main body, 4. Second fixture main body, 5. Switch mounting seat, 6. Slide table frame, 7. First optical axis, 8. The second linear bearing, 9, the second optical axis, 10, the first linear bearing, 11, the two-way screw, 12, the coupling, 13, the hand lever, 14, the first bearing, 15, the second bearing, 16. The first connection plate, 17. The second connection plate, 18. The third connection plate, 19. The fourth connection plate, 20. The first connection block, 21. The second connection block, 22. The half-ring frame, 23 , semi-annular inner sleeve, 24, metal screw cap, 25, spring, 26, sheet metal.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

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

The switch mount 5 is used to install the rotary switch to be tested, wherein the structure of the rotary switch is as shown in Figure 6;

Two fixture bodies and a clamping slide 1 for driving the two fixture bodies close to each other to connect contacts on the rotary switch, the fixture main body is connected to the clamping slide 1 through a connecting piece 2;

As shown in Figure 4 and Figure 5, the two fixture bodies are respectively the first fixture body 3 and the second fixture body 5, with the same structure, the fixture body is a half-ring clamp block, including a half-ring frame 22 and a half-ring wiring rack, The semi-annular terminal block comprises a semi-annular inner cover 23 located on the semi-annular frame 22 inner ring, a plurality of metal sheets 26 arranged on the inner side of the semi-annular inner cover 23 and arranged towards the center of the circle, positioned on the outer side of the semi-annular inner cover 23 and The number of lead posts deviated from the center of the circle is consistent with the number of metal sheets 26 and corresponds one by one, and each metal sheet 26 is connected to the corresponding lead post by wires. Wherein semi-annular frame 22 is radially punched with through holes, and the number of through holes depends on the number of tested rotary switch contacts. Metal screw cap 24, spring 25, metal sheet 26 are housed in each through hole and metal sheet and The metal screw caps are connected by wires; through the design of the half-ring clamp block, the metal sheets are designed to be arranged toward the center of the circle, so that when testing a rotary switch with a large number of metal contacts and a large assembly tolerance, it is possible to avoid the occurrence of the same probe touching multiple contacts. point, or where the probe fails to make contact with the metal contacts.

The lead column includes a spring 25 and a metal screw cap 24. The metal screw cap 24 is installed on the outside of the semi-circular frame 22 through threads. One end of the spring 25 is in contact with the corresponding metal sheet 26, and the other end is inserted into the semi-circular frame from the inside of the semi-circular inner sleeve 23. 22 and is supported by the half ring frame 22. Specifically, in this embodiment, the semi-annular inner sleeve 23 passes through the metal sheet 26 and is installed on the inner axial surface of the clamp block frame to be in close contact with the inner axial surface, and the metal screw cap 24 and the metal sheet 26 are connected by wires. The diameter of the arc formed by the end of each metal sheet 26 close to the center of the circle is smaller than the diameter of the arc formed by the end of the contact on the rotary switch away from the center of the circle. The width of each metal sheet 26 near the center of the circle is greater than the width of the contact on the rotary switch away from the center of the circle, which can improve the stability of the connection between the metal sheet and the contact on the rotary switch during the test, even if there are many metal contacts on the rotary switch. Certain processing and assembly errors can still make the contact between the metal sheet of the fixture and the metal contact of the rotary switch stable, which greatly improves the testing efficiency of the rotary switch.

As shown in Figure 2, the clamping slide 1 includes:

The slide table frame 6 includes a base plate and mounting platforms located on the same side at both ends of the base plate, and one mounting platform is provided with a first bearing 14, and the other mounting platform is provided with a second bearing 15, the first bearing 14 and the second bearing 15 interference fit in the installation table;

The hand rocker 13 is connected and matched with the first bearing 14, and the hand rocker 13 is interference fit with the first bearing 14;

Two-way lead screw 11, one end is connected with hand rocker 13 through shaft coupling 12, the other end is connected and matched with second bearing 15, and two-way lead screw 11 and second bearing 15 interference fit;

Two linear bearings are installed on the left-handed section and the right-handed section of the two-way lead screw 11 respectively, and are respectively used to fix the two fixture main bodies.

The clamping slide 1 also includes two optical axes respectively located on both sides of the two-way lead screw 11, as shown in Figure 2, the two optical axes are respectively the first optical axis 7 and the second optical axis 9, and the two optical axes Both pass through two linear bearings respectively, and both ends are respectively fixed by two mounting tables.

There are two connectors 2, which are respectively used to install two clamp bodies. Specifically, as shown in FIG. 2, the two linear bearings are respectively the first linear bearing 10 and the second linear bearing 8. The first clamp body 3 is fixed on the first linear bearing 10 through one of the connecting pieces 2, and the second clamp body 5 is fixed on the second linear bearing 8 through the other connecting piece 2. The connecting piece 2 includes: a connecting block installed on the linear bearing; two connecting plates respectively installed on both sides of the connecting block for fixing the main body of the corresponding fixture. The switch mounting base 5 is installed in the center of the base plate of the slide table frame 6 . Wherein the first connecting piece 2 is made up of the first connecting block 20, the first connecting plate 16 and the second connecting plate 17, and the other connecting piece 2 is made up of the second connecting block 21, the third connecting plate 18 and the fourth connecting plate 19 Composition, the first connecting block 20 is installed on the first linear bearing 10 by bolts, the first connecting plate 16 and the second connecting plate 17 are installed on the front and rear sides of the first connecting block 20 by bolts, and the second connecting block 21 is installed by bolts On the second linear bearing 8 , the third connecting plate 18 and the fourth connecting plate 19 are installed on the front and rear sides of the second connecting block 21 by bolts.

When using a rotary switch test fixture involved in the present invention, the fixture is shown in Figure 7. First, the rotary switch shown in Figure 6 is placed on the switch mounting base and fixed by a set screw. At this time, the state of the fixture is As shown in Figures 8-10, after the rotary switch is installed, turn the hand rocker 13, because one end of the two-way lead screw is left-handed and the other end is right-handed. After rotating the hand rocker 13, the distance between the linear bearings is shortened until the first clamp body 3 and The second fixture main body 5 is in contact, and at this time, the metal sheet on the fixture is in contact with the metal contact, so as to achieve the purpose of clamping the switch.

Generally speaking, the device has a simple structure, is easy to control, and has low processing, transfer and maintenance costs, and is suitable for rotary switch testing instruments.

Claims (7)

1. A rotary switch test fixture, comprising:

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

the two clamp bodies and the clamping sliding table (1) are used for driving the two clamp bodies to be mutually close to be connected with the upper contact of the rotary switch, and the clamp bodies are connected with the clamping sliding table (1) through the connecting piece (2);

the clamp is characterized in that the clamp body is a semi-annular clamp block and comprises a semi-annular rack (22) and a semi-annular wiring frame, wherein the semi-annular wiring frame comprises a semi-annular inner sleeve (23) arranged on the inner ring of the semi-annular rack (22), a plurality of metal sheets (26) arranged on the inner side of the semi-annular inner sleeve (23) and facing to the circle center, and a plurality of lead posts arranged on the outer side of the semi-annular inner sleeve (23) and deviating from the circle center, the number of the lead posts is consistent with that of the metal sheets (26) and corresponds to that of the metal sheets (26) one by one, and each metal sheet (26) is connected with the corresponding lead post through a lead;

the lead column comprises a spring (25) and a metal screw cap (24), the metal screw cap (24) is arranged on the outer side of the semi-annular frame (22) through threads, one end of the spring (25) is in contact with a corresponding metal sheet (26), and the other end of the spring is inserted into the semi-annular frame (22) from the inner side of the semi-annular inner sleeve (23) and supported by the semi-annular frame (22);

the diameter of the arc formed by the end of each metal sheet (26) close to the circle center is smaller than the diameter of the arc formed by the end of the contact point on the rotary switch away from the circle center;

the width of one end of each metal sheet (26) close to the circle center is larger than the width of one end of the contact point, far away from the circle center, of the rotary switch.

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

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

the hand rocker (13) is connected and matched with the first bearing (14);

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

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

3. A rotary switch testing fixture according to claim 2, characterized in that the clamping slide table (1) further comprises two optical axes respectively located at two sides of the bidirectional screw rod (11), the two optical axes respectively pass through the two linear bearings, and the two ends are respectively fixed by the two mounting tables.

4. A rotary switch test fixture according to claim 2, characterized in that the hand lever (13) is in interference fit with the first bearing (14).

5. A rotary switch test fixture according to claim 2, characterized in that the bi-directional screw (11) is interference fit with the second bearing (15).

6. A rotary switch testing fixture according to claim 2, wherein said connecting member (2) is provided with two in total, for mounting two fixture bodies, respectively, said connecting member (2) comprising:

the connecting block is arranged on the linear bearing;

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

7. A rotary switch test fixture according to claim 2, characterized in that the switch mount (5) is mounted in the centre of the base plate of the slipway frame (6).

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