Microwave coaxial precision test fixture

Abstract

The invention relates to a microwave coaxial precision test fixture, and relates to the field of wire test fixtures, the microwave coaxial precision test fixture comprises a machine body, a cylinder, a lower pressing block, a spring and a fixed sliding block, the machine body comprises a fixed base, a support frame and a cover plate, one end of the support frame is fixed on the fixed base, the other end of the support frame is fixed on the cover plate, and a cylinder body of the cylinder is slidably connected on the cover plate; a piston rod of the air cylinder is connected with the lower pressing block, the fixed sliding block is fixed to a cylinder body of the air cylinder, a limiting plate is arranged on the supporting frame and used for abutting against the lower bottom face of the fixed sliding block, and the spring is vertically arranged on the cover plate and used for abutting against the upper top face of the fixed sliding block. The device has the effect that the air cylinder with low stroke precision can drive the pressing block to move and detect the electric wire.

Description

Technical Field

[0001] The present application relates to the field of wire testing fixtures, and in particular to a microwave coaxial precision testing fixture. Background Art

[0002] A microwave coaxial test fixture is a high-precision test tool used in the RF and microwave fields. It is primarily used to connect test equipment such as vector network analyzers to the device under test. During use, a wire is inserted into the fixture, allowing the clamp to slide and clamp the wire to achieve the test purpose.

[0003] The existing microwave coaxial test fixture includes a body, a cylinder and a pressure block. The body includes a fixed base, a support frame and a cover plate. One end of the support frame is fixed to the fixed base and the other end is fixed to the cover plate. One end of the cylinder is connected to the cover plate and the other end is connected to the pressure block. The user places the wire to be tested on the fixed base to extend the cylinder, which can press the pressure block down on the wire to achieve the purpose of testing the wire.

[0004] The above-mentioned related technical solutions have the following defects: when the stroke accuracy of the cylinder is low, the moving position of the pressure block is difficult to control; when the cylinder drops a large amount, the pressure block over-compresses the wires, which can easily cause the wires to deform. Summary of the Invention

[0005] In order to enable a cylinder with low stroke accuracy to drive a pressure block to move and detect wires, the present application provides a microwave coaxial precision test fixture.

[0006] The present application provides a microwave coaxial precision test fixture that adopts the following technical solutions: A microwave coaxial precision test fixture includes a body, a cylinder, a downward pressure block, a spring and a fixed slider. The body includes a fixed base, a support frame and a cover plate. One end of the support frame is fixed to the fixed base, and the other end is fixed to the cover plate. The cylinder body is slidably connected to the cover plate, the piston rod of the cylinder is connected to the downward pressure block, the fixed slider is fixed to the cylinder body, a limit plate is provided on the support frame, the limit plate is used to abut against the lower bottom surface of the fixed slider, the spring is vertically arranged on the cover plate, and the spring is used to abut against the upper top surface of the fixed slider.

[0007] By adopting the above technical solution, the cylinder is connected by sliding on the cover plate, so that the cylinder can drive the lower pressure block to move vertically through expansion and contraction. When the cylinder is extended, the lower pressure block falls on the fixed base. At this time, the lower pressure block applies pressure to the wire. When the cylinder extension stroke is large, the cylinder pushes the fixed slider to move the fixed slider upward. At this time, the fixed slider is pushed by the spring, so that the pressure applied to the wire by the lower pressure block is equal to the thrust of the spring. The cylinder with lower stroke accuracy can be used to detect wires, and the wires are less damaged during the detection process.

[0008] Optionally, the fixed base includes an upper base plate, a lower base plate and a pressure plate, the upper base plate and the lower base plate are detachably connected, the upper base plate and the lower base plate jointly clamp and engage the pressure plate, and the lower pressure block is used to move and abut against the pressure plate.

[0009] By adopting the above technical solution, by slotting the upper base plate and the lower base plate, the pressure plate can be clamped between the upper base plate and the lower base plate, so that the pressure plate remains in a fixed position. The user can replace the pressure plate, so that pressure plates of different shapes can be installed on the fixed base and cooperate with the lower pressure block.

[0010] Optionally, arc protrusions are provided on both sides of the lower pressing block, and a limiting groove is opened on the side wall of the upper base plate. The length direction of the limiting groove is parallel to the length direction of the cylinder, and the arc protrusion is used to be clamped in the limiting groove.

[0011] By adopting the above technical solution, arc protrusions are set on both sides of the lower pressing block so that the arc protrusions are stuck in the limit grooves. When the lower pressing block moves vertically, the arc protrusions play a guiding role, which can reduce the probability of horizontal slippage of the lower pressing block and improve the movement accuracy of the lower pressing block.

[0012] Optionally, a tooth groove 1 is provided on the pressing plate, and a tooth groove 2 is provided on the lower bottom surface of the lower pressing block, and the tooth groove 1 is meshed with the tooth groove 2.

[0013] By adopting the above technical solution, by opening the first tooth groove on the pressing plate and the second tooth groove on the lower pressing block, the first tooth groove and the second tooth groove can be engaged with each other, thereby improving the clamping effect of the wire and being able to firmly clamp the wire.

[0014] Optionally, a slide rail is provided on the support frame, the length direction of the slide rail is parallel to the length direction of the cylinder, and the fixed slider is slidably connected to the slide rail.

[0015] By adopting the above technical solution, a slide rail is set on the support frame, so that the slide rail is slidably connected to the fixed slider. The fixed slider guides the cylinder. When the cylinder is extended or retracted, the cylinder can slide in the vertical direction, thereby improving the movement accuracy of the cylinder.

[0016] Optionally, the cover plate is provided with an adjustment mechanism, which includes a stud, which passes through the cover plate and is threadedly connected to the cover plate, and is used to abut against one end of the spring.

[0017] By adopting the above technical solution, by arranging a stud on the cover plate, the user can screw the stud to move the stud in the vertical direction, so that the lower end of the stud can squeeze the spring and adjust the length of the spring when it contracts, thereby achieving the effect of adjusting the pressure of the lower pressure block on the wire, and being able to detect different wires.

[0018] Optionally, a pressure sensor is provided on one end of the spring away from the fixed slider. The pressure sensor is a disc-shaped structure, one side of the pressure sensor abuts against the stud, and the other side abuts against the spring.

[0019] By adopting the above technical solution, a pressure sensor is arranged on the spring. When the spring contracts, one end of the spring abuts against the pressure sensor and the other end abuts against the fixed slider. When the spring contracts and pushes the fixed slider, the pressure sensor can detect the spring force, thereby making it convenient for the user to screw the stud and adjust the spring.

[0020] Optionally, a rotating disk is provided on both sides of the spring, and the rotating disk includes a circular disk and multiple balls. The multiple balls are arranged at equal intervals along the circumference of the disk, and the balls are embedded in and rotatably connected to the circular disk. One circular disk is fixed on the stud and abuts against the pressure sensor through the balls, and the other circular disk is fixed on the spring and abuts against the fixed slider through the balls. The rotating disk is used to drive the spring to rotate along the axial direction.

[0021] By adopting the above technical solution, by arranging rotating disks on both sides of the spring, when the user rotates the stud, the end of the spring rotates through the rotating disk, thereby reducing the torque on the spring and reducing the probability of spring breakage.

[0022] Optionally, a limiting column is provided in the spring, and the limiting column includes an upper sleeve and a slide rod. The upper sleeve is fixed on the pressure sensor, the slide rod is installed on the rotating disk on the lower side of the spring, the slide rod is inserted into the upper sleeve, and the spring is sleeved on the limiting column.

[0023] By adopting the above technical solution, a limiting column is provided in the spring so that the limiting column supports the spring and the spring remains in a vertical state, thereby enabling the spring to exert a stable vertical downward thrust on the fixed slider.

[0024] Optionally, a circular groove is provided on the fixed slider, and the ball bearing is clamped in the circular groove.

[0025] By adopting the above technical solution, a circular groove is opened on the fixed slider, so that the ball is stuck in the circular groove and rotates, thereby reducing the probability of the rotating disk slipping in the horizontal direction, keeping the rotating disk and the spring position vertical, and enabling the spring to apply vertical thrust to the fixed slider.

[0026] In summary, the beneficial technical effects of this application are: 1. By sliding the cylinder on the cover, the cylinder can drive the lower pressure block to move vertically through expansion and contraction. When the cylinder is extended, the lower pressure block falls on the fixed base. At this time, the lower pressure block applies pressure to the wire. When the cylinder extends to a large extent, the cylinder pushes the fixed slider upward. At this time, the fixed slider is pushed by the spring, so that the pressure applied by the lower pressure block on the wire is equal to the thrust of the spring. Cylinders with lower stroke accuracy can be used to detect wires, and the detection process causes less damage to the wires. 2. By setting arc-shaped protrusions on both sides of the lower pressing block, the arc-shaped protrusions are stuck in the limit grooves. When the lower pressing block moves vertically, the arc-shaped protrusions play a guiding role, which can reduce the probability of horizontal slippage of the lower pressing block and improve the movement accuracy of the lower pressing block; 3. By setting a pressure sensor on the spring, when the spring contracts, one end of the spring abuts against the pressure sensor and the other end abuts against the fixed slider. When the spring contracts and pushes the fixed slider, the pressure sensor can detect the spring force, making it convenient for the user to screw the stud and adjust the spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure when the lower pressing block of Example 1 of the present application is lifted.

[0028] Figure 2 It is a schematic diagram of the overall structure of the lower pressing block when falling in Example 1 of the present application.

[0029] Figure 3 This is a schematic diagram of the connection between the fixed slider and the support frame of Example 1 of the present application.

[0030] Figure 4 It is a structural schematic diagram of the fixed base of Example 1 of the present application.

[0031] Figure 5 This is a schematic diagram of the installation position of the adjustment mechanism of Example 2 of the present application.

[0032] Figure 6 This is a schematic diagram of the structure of the adjustment mechanism of Example 2 of this application Figure 1 .

[0033] Figure 7 This is a schematic diagram of the structure of the adjustment mechanism of Example 2 of this application Figure 2 .

[0034] Figure 8 This is a schematic diagram of the connection between the stud and the rotating disk in Example 2 of the present application.

[0035] Figure 9 This is a schematic diagram of the position of the pressure sensor in Example 2 of the present application.

[0036] Figure 10It is a structural schematic diagram of the fixed slider of Example 2 of the present application.

[0037] Figure numerals: 1. Body; 11. Fixed base; 111. Upper base plate; 112. Lower base plate; 113. Pressing plate; 114. Tooth groove 1; 115. Limiting groove; 12. Support frame; 121. Slide rail; 122. Limiting plate; 13. Cover plate; 131. Mounting hole; 2. Cylinder; 3. Lower pressing block; 31. Tooth groove 2; 32. Arc protrusion; 4. Spring; 5. Fixed slider; 51. Circular groove 1; 6. Adjusting mechanism; 61. Stud; 611. Clearance hole; 62. Rotating disk; 621. Circular disk; 622. Ball bearing; 63. Limiting column; 631. Upper sleeve; 632. Slide rod; 64. Pressure sensor; 641. Circular groove 2; 642. Wire. DETAILED DESCRIPTION

[0038] The present application is further described in detail below with reference to the accompanying drawings.

[0039] Example 1 The present application discloses a microwave coaxial precision test fixture, referring to Figure 1 and Figure 2 , including a body 1, a cylinder 2, a pressing block 3, a spring 4 and a fixed slider 5. The body 1 includes a fixed base 11, a support frame 12 and a cover plate 13. One end of the support frame 12 is fixed to the fixed base 11 and the other end is connected to the cover plate 13. The fixed base 11 is set on the table and is parallel to the cover plate 13. The cylinder 2 is vertically arranged and slidably connected to the cover plate 13. The cylinder body of the cylinder 2 is slidably connected to the cover plate 13. The piston rod of the cylinder 2 is connected to the pressing block 3. The pressing block 3 is used to fall and press on the fixed base 11, thereby completing the work of squeezing and testing the wires. The fixed slider 5 is fixedly connected to the cylinder body of the cylinder 2. The spring 4 is vertically arranged. The upper end of the spring 4 is connected to the cover plate 13, and the lower end of the spring 4 abuts against the upper top surface of the fixed slider 5. A limit plate 122 is provided on the support frame 12. The limit plate 122 is used to be clamped on the lower bottom surface of the fixed slider 5.

[0040] Reference Figure 1 and Figure 2When the cylinder 2 contracts, the lower pressing block 3 is lifted, and a gap is formed between the lower pressing block 3 and the fixed base 11. The spring 4 applies an elastic force to the fixed slider 5, causing the fixed slider 5 to be stuck on the limit plate 122. When the cylinder 2 extends, the lower pressing block 3 falls and abuts on the fixed base 11. By setting the wire to be tested between the lower pressing block 3 and the fixed base 11, the lower pressing block 3 can press on the wire and detect the wire. When the cylinder 2 extends a large stroke and the lower pressing block 3 abuts the fixed base 11, the cylinder body of the cylinder 2 slides upward. At this time, the spring 4 is squeezed and deformed by the fixed slider 5, and the pressure on the wire between the lower pressing block 3 and the fixed base 11 is the elastic force applied by the spring 4. During the test process, the stroke accuracy requirements of the cylinder 2 are relatively low. When the cylinder 2 extends a large stroke, the pressure applied by the lower pressing block 3 on the wire is stable, which can reduce the chance of damaging the wire during testing.

[0041] Reference Figure 3 and Figure 4 The fixed base 11 includes an upper base plate 111, a lower base plate 112, and a pressure plate 113. The upper base plate 111 and the lower base plate 112 are detachably connected. The lower base plate 112 is located at the bottom of the body 1, and the upper base plate 111 is connected to the support frame 12. Grooves are formed on the upper base plate 111 and the lower base plate 112. The pressure plate 113 is disposed between the upper base plate 111 and the lower base plate 112. The lower pressure block 3 is disposed in the groove of the upper base plate 111. When the lower pressure block 3 falls, it can fall onto the pressure plate 113. The pressure plate 113 is stuck between the upper base plate 111 and the lower base plate 112 and maintains a stable position.

[0042] Reference Figure 3 and Figure 4 The upper surface of the pressing plate 113 is provided with a tooth groove 114, and the lower bottom surface of the lower pressing block 3 is provided with a tooth groove 2 31, and the tooth groove 114 is engaged with the tooth groove 2 31. The cross-section of the tooth groove 114 and the tooth groove 2 31 is in the shape of an isosceles trapezoid.

[0043] Reference Figure 4 The upper base plate 111 defines a limiting groove 115. Arc bumps 32 are provided on both sides of the lower pressing block 3. These arc bumps 32 have a semicircular cross-section and are engaged within the limiting grooves 115. The limiting grooves 115 extend vertically, and their cross-sections are identical to those of the arc bumps 32. When the lower pressing block 3 moves vertically, the arc bumps 32 act as guides, reducing the likelihood of the lower pressing block 3 shaking and ensuring higher wire detection accuracy.

[0044] Reference Figure 3 A slide rail 121 is fixed on the support frame 12, and the length direction of the slide rail 121 is parallel to the length direction of the support frame 12. The fixed slider 5 is slidably connected to the slide rail 121. The slide rail 121 plays a guiding role, enabling the fixed slider 5 to move back and forth stably in the vertical direction.

[0045] Reference Figure 1 The cover plate 13 is provided with a mounting hole 131, which passes through the cover plate 13, and the cylinder 2 is arranged in the mounting hole 131. One end of the cylinder 2 located on the upper side of the cover plate 13 is connected to an air pipe, which ventilates the cylinder 2 so that the cylinder 2 can be extended and retracted.

[0046] Example 2 The present application discloses a microwave coaxial precision test fixture, referring to Figure 5 A plurality of adjustment mechanisms 6 are provided on the cover plate 13, and a spring 4 is provided on each adjustment mechanism 6. The adjustment mechanism 6 is used to adjust the elastic force applied by the spring 4 to the fixed slider 5, thereby adjusting the pressure applied by the pressing block 3 to the wire. The pressing block 3 can insert the probe into the wires to be tested with different skin materials, so that the test fixture can detect wires of different specifications.

[0047] Reference Figure 6 and Figure 7 The adjustment mechanism 6 includes a stud 61 and two rotating disks 62. The stud 61 vertically penetrates the cover plate 13 and is threadedly connected to the cover plate 13. The two rotating disks 62 are respectively arranged on either side of the spring 4, with one rotating disk 62 abutting against the stud 61 and the other rotating disk 62 abutting against the fixed slider 5. When the lower pressure block 3 falls on the fixed base 11 and the fixed slider 5 is disconnected from the limit plate 122, the stud 61 can be screwed to vertically raise or lower the stud 61, causing it to squeeze the spring 4 or relax the spring 4, thereby adjusting the elastic force exerted by the spring 4 on the fixed slider 5.

[0048] Reference Figure 7 and Figure 8 The rotating disk 62 includes a circular disk 621 and a plurality of balls 622. The balls 622 are embedded in the circular disk 621 and are rotatably connected thereto. The spring 4 is connected to the circular disk 621 at both ends. The upper rotating disk 62 abuts the stud 61 via the balls 622, while the lower rotating disk 62 abuts the fixed slider 5 via the balls 622. When the user tightens the stud 61, the torsional stress on the spring 4 is relieved by the rotating disk 62, thereby reducing the chance of breaking the spring 4. During the tightening process, the friction on both ends of the spring 4 is reduced, thereby increasing the service life of the spring 4.

[0049] Reference Figure 9 A limiting post 63 is disposed between the two rotating disks 62. The limiting post 63 comprises an upper sleeve 631 and a slide rod 632. The upper sleeve 631 is coaxially connected to one rotating disk 62, while the slide rod 632 is coaxially connected to the other rotating disk 62. The slide rod 632 is inserted into the upper sleeve 631. When the stud 61 presses against the rotating disks 62, the spring 4 is positioned between the two rotating disks 62 and sleeved around the limiting post 63. The limiting post 63 keeps the spring 4 upright, thereby enabling the spring 4 to exert stable pressure on the fixed slider 5.

[0050] Reference Figure 9 A pressure sensor 64 is provided between the stud 61 and the rotating disk 62, located above the spring 4. The upper sleeve 631 is fixed to the pressure sensor 64, and the upper end of the spring 4 abuts against the pressure sensor 64. The rotating disk 62, located above the spring 4, is fixed to the stud 61 and abuts against the pressure sensor 64 via the ball bearing 622. When the lower pressing block 3 presses against the pressure plate 113 and the fixed slider 5 is disconnected from the limit plate 122, one end of the spring 4 presses against the pressure sensor 64 and the other end presses against the fixed slider 5. The pressure sensor 64 can detect the elastic force of the spring 4, and thus the pressure applied by the lower pressing block 3 to the wire.

[0051] Reference Figure 9 and Figure 10 The top surface of the fixed slider 5 has a circular groove 1 51, into which the ball bearing 622 in the rotating disk 62 is engaged and rotates. The top surface of the pressure sensor 64 has a circular groove 2 641, which engages with the ball bearing 622. Grooves 1 51 and 641 act as position limiters, reducing the chance of lateral slippage of the rotating disk 62 and ensuring that the rotating disk 62 rotates only along its axis.

[0052] Reference Figure 6 A clearance hole 611 is opened in the middle of the stud 61, and the clearance hole 611 passes through the stud 61. A wire 642 is provided on the pressure sensor 64, and the wire 642 extends through the clearance hole 611. The wire 642 is used to power the pressure sensor 64 and transmit electrical signals.

[0053] The implementation principle of the embodiment of the present application is as follows: by arranging a cylinder 2 on the body 1 and arranging a pressing block 3 on the piston rod of the cylinder 2, the cylinder 2 can drive the pressing block 3 to move by extension and contraction. When the wire is set on the fixed base 11, the pressing block 3 falls and presses on the wire to achieve the detection purpose. When the cylinder 2 is extended, when the stroke accuracy of the cylinder 2 is low, the cylinder 2 is likely to damage the wire. By making the cylinder 2 slidably connected to the cover plate 13, the excess stroke when the cylinder 2 moves pushes the cylinder 2 to slide, which can achieve the effect of protecting the wire. When the fixed slider 5 is disconnected from the limit plate 122, the fixed slider 5 is subjected to the elastic force of the spring 4. At this time, the pressure of the pressing block 3 on the wire is the elastic force of the spring 4, and the detection data is highly accurate.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A microwave coaxial precision test fixture, characterized by: The invention comprises a machine body (1), a cylinder (2), a lower pressure block (3), a spring (4) and a fixed slider (5), wherein the machine body (1) comprises a fixed base (11), a support frame (12) and a cover plate (13), wherein one end of the support frame (12) is fixed to the fixed base (11) and the other end is fixed to the cover plate (13), the cylinder body of the cylinder (2) is slidably connected to the cover plate (13), the piston rod of the cylinder (2) is connected to the lower pressure block (3), the fixed slider (5) is fixed to the cylinder body of the cylinder (2), a limiting plate (122) is provided on the support frame (12), the limiting plate (122) is used to abut against the lower bottom surface of the fixed slider (5), the spring (4) is vertically provided on the cover plate (13), and the spring (4) is used to abut against the upper top surface of the fixed slider (5).

2. The microwave coaxial precision test fixture according to claim 1, characterized in that: The fixed base (11) comprises an upper base plate (111), a lower base plate (112) and a pressing plate (113); the upper base plate (111) and the lower base plate (112) are detachably connected; the upper base plate (111) and the lower base plate (112) jointly clamp and engage the pressing plate (113); and the lower pressing block (3) is used to move and abut against the pressing plate (113).

3. The microwave coaxial precision test fixture according to claim 2, characterized in that: Circular arc protrusions (32) are provided on both sides of the lower pressing block (3), and a limiting groove (115) is provided on the side wall of the upper base plate (111). The length direction of the limiting groove (115) is parallel to the length direction of the cylinder (2), and the circular arc protrusion (32) is used to be clamped in the limiting groove (115).

4. The microwave coaxial precision test fixture according to claim 3, characterized in that: The pressure plate (113) is provided with a tooth groove (114), and the lower bottom surface of the lower pressure block (3) is provided with a tooth groove (31), and the tooth groove (114) and the tooth groove (31) are meshed.

5. The microwave coaxial precision test fixture according to claim 1, characterized in that: A slide rail (121) is provided on the support frame (12), the length direction of the slide rail (121) is parallel to the length direction of the cylinder (2), and the fixed slider (5) is slidably connected to the slide rail (121).

6. The microwave coaxial precision test fixture according to claim 1, characterized in that: An adjustment mechanism (6) is provided on the cover plate (13), and the adjustment mechanism (6) includes a stud (61). The stud (61) passes through the cover plate (13) and is threadedly connected to the cover plate (13). The stud (61) is used to abut against one end of the spring (4).

7. The microwave coaxial precision test fixture according to claim 6, characterized in that: A pressure sensor (64) is provided on one end of the spring (4) away from the fixed slider (5). The pressure sensor (64) is a disc-shaped structure. One side of the pressure sensor (64) abuts against the stud (61) and the other side abuts against the spring (4).

8. The microwave coaxial precision test fixture according to claim 7, characterized in that: A rotating disk (62) is provided on both sides of the spring (4), and the rotating disk (62) includes a disk (621) and a plurality of balls (622). The plurality of balls (622) are arranged at equal intervals along the circumferential direction of the disk (621). The balls (622) are embedded in and rotatably connected to the disk (621). One disk (621) is fixed on the stud (61) and abuts against the pressure sensor (64) through the balls (622). The other disk (621) is fixed on the spring (4) and abuts against the fixed slider (5) through the balls (622). The rotating disk (62) is used to drive the spring (4) to rotate along the axial direction.

9. The microwave coaxial precision test fixture according to claim 8, characterized in that: A limiting column (63) is provided in the spring (4), and the limiting column (63) includes an upper sleeve (631) and a slide rod (632). The upper sleeve (631) is fixed on the pressure sensor (64), and the slide rod (632) is installed on the rotating disk (62) on the lower side of the spring (4). The slide rod (632) is inserted into the upper sleeve (631), and the spring (4) is sleeved on the limiting column (63).

10. The microwave coaxial precision test fixture according to claim 9, characterized in that: The fixed slider (5) is provided with a circular groove, and the ball (622) is clamped in the circular groove.

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