Clamp device for probe machine

Abstract

The invention relates to the technical field of probe machines, and provides a clamp device for a probe machine, which comprises a rack and two groups of clamping assemblies arranged on the rack and used for clamping a circuit board, and the distance between the two groups of clamping assemblies is adjustable. The clamping assembly comprises a lower supporting plate, an upper pressing plate hinged to the lower supporting plate and a driving part used for driving the upper pressing plate to deflect to achieve clamping / loosening. The distance between the two clamping assemblies is adjusted according to the size of a to-be-detected circuit board so as to adapt to the size of the to-be-detected circuit board, then the two sides of the circuit board are put on the lower supporting plates in the two clamping assemblies respectively, and the position of the circuit board is adjusted. And then the driving part drives the clamping opening of the upper pressing plate to deflect towards the direction of the lower supporting plate so as to tightly press and fix the circuit board, and the driving part can accurately control the deflection stroke and the clamping force of the upper pressing plate, so that the clamping requirements of soft and hard circuit boards with different thicknesses are met, and meanwhile, the effect of protecting the circuit board is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of probe machines, and in particular to a clamp device for a probe machine. Background Art

[0002] In the application of probe machines, the clamping of circuit boards is a key link in the detection process. Traditionally, circuit boards are mainly clamped by airbag clamps. However, airbag clamps have exposed a series of technical defects in actual applications.

[0003] First, the configuration of the airbag clamp system is complex and requires an additional air source device and a complete set of pneumatic system support, which not only increases the equipment cost, but also brings greater noise pollution. Secondly, the size of the airbag clamp mouth is usually designed to be wider to accommodate circuit boards of different sizes. However, when testing small-area circuit boards, the middle part of the clamp mouth often becomes the main force-bearing area. Due to the elasticity of the gas inside the airbag and the fluidity of the pneumatic system, the pressure in the middle part of the clamp mouth is difficult to accurately control, resulting in deformation and bulging of the clamp mouth. This deformation will gradually increase over time, reducing the clamping ability of the clamp for small thin plates and significantly reducing the clamping reliability. In addition, due to the lack of flexibility of the air pressure system, the clamping force is difficult to achieve precise regulation, which can easily cause damage to the circuit board.

[0004] Therefore, the present invention proposes a fixture device for a probe machine to solve the above problems. Summary of the invention

[0005] An embodiment of the present invention aims to provide a fixture device for a probe machine to solve the above-mentioned problem.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A clamping device for a probe machine comprises a frame and two groups of clamping assemblies arranged on the frame for clamping circuit boards, wherein the distance between the two groups of clamping assemblies is adjustable, and the clamping assembly comprises a lower support plate, an upper pressure plate hinged on the lower support plate, and a driving component for driving the upper pressure plate to deflect to achieve clamping / loosening.

[0008] In an optional solution: a plurality of force-releasing grooves are provided on the upper pressure plate.

[0009] In an optional solution: the clamping opening of the upper pressing plate is in an inverted V shape.

[0010] In an optional solution: the driving component includes a box frame arranged on the lower support plate, an abutment member arranged on the upper pressure plate, and a push block abutting against the abutment member, the abutment member has an arc, a first guide rail and an integrated electric cylinder capable of displacement and force control feedback are arranged on the box frame, a slider is slidably arranged on the first guide rail, the slider is connected to the push block, and a push rod is arranged between the driving end of the integrated electric cylinder and the push block;

[0011] The driving component also includes a plurality of magnetic attraction groups for driving the upper pressure plate to deflect and loosen, and the magnetic attraction group includes a first magnetic attraction member arranged on the lower support plate and a second magnetic attraction member arranged on the upper pressure plate, and the first magnetic attraction member and the second magnetic attraction member are arranged opposite to each other.

[0012] In an optional solution: the tail end of the integrated electric cylinder is connected to the box frame, and a joint bearing is provided between the tail end of the integrated electric cylinder and the box frame.

[0013] In an optional solution: the clamping device also includes a distance adjustment component for adjusting the distance between the two groups of clamping components.

[0014] In an optional scheme: the distance adjustment component includes at least one second guide rail arranged on the frame, two slide seats are slidably arranged on the second guide rail, and the two slide seats are respectively connected to the lower support plates in the two groups of clamping assemblies. The frame is also provided with a second guide rail and a driving member for driving the forward and reverse thread screws to rotate. The forward thread section and the reverse thread section of the forward and reverse thread screws are both provided with connecting seats in a threaded matching manner, and the two connecting seats are respectively fixedly connected to the two slide seats.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0016] 1. Adjust the distance between the two sets of clamping components according to the size of the circuit board to be tested, so that it can adapt to the size of the circuit board to be tested, and then place the two sides of the circuit board on the lower support plates in the two sets of clamping components respectively, and adjust the position of the circuit board. Then, drive the upper pressure plate clamp to deflect toward the lower support plate through the driving component to press and fix the circuit board. The driving component can accurately control the deflection stroke and clamping force of the upper pressure plate, so as to adapt to the clamping requirements of soft and hard circuit boards of different thicknesses, and at the same time play a role in protecting the circuit board;

[0017] 2. The clamping mouth of the upper pressure plate is in an inverted V shape (micro). When clamping the circuit board, the four corners of the circuit board are clamped first, which improves the stability of the circuit board clamping;

[0018] 3. The tail end of the integrated electric cylinder is connected to the box frame, and a joint bearing is provided between the tail end of the integrated electric cylinder and the box frame, which can fine-tune the relative non-parallelism of the movement of the integrated electric cylinder and the first guide rail, thereby protecting the integrated electric cylinder and improving the durability of the integrated electric cylinder.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and are used together with the specification to explain the principles of the present application. At the same time, these drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of the structure of the clamping assembly in an embodiment of the present invention.

[0023] Figure 3 It is a partial schematic diagram of the clamping opening of the upper pressing plate in an embodiment of the present invention.

[0024] Figure 4 for Figure 2 Sectional view in EE direction (clamped state).

[0025] Figure 5 for Figure 2 Sectional view in EE direction (loose state).

[0026] Figure 6 for Figure 2 Cross-sectional view in the FF direction.

[0027] Figure 7 for Figure 1 Enlarged view of point A in the middle.

[0028] Notes on figure marks: 1-frame, 2-clamping assembly, 201-lower support plate, 202-upper pressure plate, 203-force unloading groove, 204-driving component, 2041-box frame, 2042-integrated electric cylinder, 2043-push rod, 2044-first guide rail, 2045-slider, 2046-push block, 2047-abutment member, 2048-first magnetic member, 2049-second magnetic member, 20410-spherical bearing, 3-adjustable distance assembly, 301-second guide rail, 302-positive and negative threaded screws, 303-driving component, 304-slide seat, 305-connecting seat. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0030] See also Figure 1 and Figure 3 A clamping device for a probe machine includes a frame 1 and two groups of clamping components 2 arranged on the frame 1 for clamping circuit boards, the distance between the two groups of clamping components 2 is adjustable, and the clamping components 2 include a lower support plate 201, an upper pressure plate 202 hinged on the lower support plate 201, and a driving component 204 for driving the upper pressure plate 202 to deflect to achieve clamping / loosening.

[0031] According to the size of the circuit board to be tested, the distance between the two groups of clamping components 2 is adjusted to adapt to the size of the circuit board to be tested, and then the two sides of the circuit board are respectively placed on the lower support plate 201 in the two groups of clamping components 2, and the position of the circuit board is adjusted. Then, the driving component 204 drives the clamping mouth of the upper pressure plate 202 to deflect toward the lower support plate 201 to press and fix the circuit board. The driving component 204 can accurately control the deflection stroke and clamping force of the upper pressure plate 202, so as to adapt to the clamping requirements of soft and hard circuit boards of different thicknesses, and at the same time play a role in protecting the circuit board.

[0032] Furthermore, the upper pressure plate 202 is provided with a plurality of force unloading grooves 203 to reduce deformation of the upper pressure plate 202 during processing and facilitate the release of stress on the upper pressure plate 202 caused by the reaction of the local middle clamping force during clamping use, thereby reducing the accumulated deformation at both ends of the upper pressure plate 202 and improving the long-term accuracy retention of the upper pressure plate 202.

[0033] Furthermore, the clamping opening of the upper pressing plate 202 is in an inverted V shape (miniature), and when clamping the circuit board, the four corners of the circuit board are clamped first, thereby improving the stability of the circuit board clamping.

[0034] See also Figure 1 , Figures 4 to 6 In one embodiment of the present invention, the driving component 204 includes a box frame 2041 arranged on the lower support plate 201, an abutment member 2047 arranged on the upper pressure plate 202, and a push block 2046 abutting against the abutment member 2047, the abutment member 2047 has an arc, a first guide rail 2044 and an integrated electric cylinder 2042 capable of displacement and force control feedback are provided on the box frame 2041, a slider 2045 is slidably provided on the first guide rail 2044, the slider 2045 is connected to the push block 2046, and a push rod 2043 is provided between the driving end of the integrated electric cylinder 2042 and the push block 2046;

[0035] The driving component 204 also includes a plurality of magnetic attraction groups for driving the upper pressure plate 202 to deflect and loosen, and the magnetic attraction group includes a first magnetic attraction member 2048 arranged on the lower support plate 201 and a second magnetic attraction member 2049 arranged on the upper pressure plate 202, and the first magnetic attraction member 2048 and the second magnetic attraction member 2049 are arranged opposite to each other.

[0036] It should be noted that the integrated electric cylinder 2042 is integrated with a displacement sensor and a force sensor, so that accurate displacement (ie, driving distance) and force control feedback can be performed to ensure the accuracy of clamping control. The corresponding feedback and control technologies belong to the prior art and will not be elaborated here.

[0037] In this embodiment, the clamping action is specifically as follows: the integrated electric cylinder 2042 is used to drive the push block 2046 to move laterally toward the abutment member 2047. Since the push block 2046 is abutted against the abutment member 2047, and the abutment member 2047 is connected to the upper pressure plate 202, the push block 2046 will abut against the abutment member 2047 when moving, thereby driving the clamping mouth of the upper pressure plate 202 to deflect toward the lower support plate 201, thereby achieving the clamping and fixing of the circuit board; the loosening action is specifically as follows: the integrated electric cylinder 2042 is used to drive the push block 2046 to move laterally away from the abutment member 2047, and the first magnetic attraction member 2048 magnetically attracts the second magnetic attraction member 2049, thereby driving the clamping mouth of the upper pressure plate 202 to tilt up, that is, deflect in the direction away from the lower support plate 201, thereby achieving the loosening of the circuit board.

[0038] Furthermore, in this embodiment, the push block 2046 is made of high-strength brass material to ensure its durability.

[0039] Furthermore, in the present embodiment, the tail end of the integrated electric cylinder 2042 is connected to the box frame 2041, and a joint bearing 20410 is provided between the tail end of the integrated electric cylinder 2042 and the box frame 2041, which has the function of fine-tuning the relative non-parallelism of the movement of the integrated electric cylinder 2042 and the first guide rail 2044, thereby protecting the integrated electric cylinder 2042 and improving the durability of the integrated electric cylinder 2042.

[0040] See also Figure 1 and Figure 7 , In one embodiment of the present invention, the clamp device further comprises a distance adjustment component 3 for adjusting the distance between the two groups of clamping components 2;

[0041] The distance adjustment component 3 includes at least one second guide rail 301 arranged on the frame 1, and two slide seats 304 are slidably provided on the second guide rail 301. The two slide seats 304 are respectively connected to the lower support plates 201 in the two groups of clamping components 2. The frame 1 is also provided with a second guide rail 301 and a driving member 303 for driving the forward and reverse thread screws 302 to rotate. The driving member 303 is a servo motor. The forward thread section and the reverse thread section of the forward and reverse thread screws 302 are both provided with connecting seats 305 in a threaded matching manner. The two connecting seats 305 are respectively fixedly connected to the two slide seats 304.

[0042] In this embodiment, the driving member 303 drives the forward and reverse screws 302 to rotate and then drives the two groups of clamping components 2 to move synchronously away from or towards each other, so as to adjust the distance between the two groups of clamping components 2 to adapt to the size of the circuit board to be tested.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fixture device for a probe machine, characterized in that: The invention comprises a frame (1) and two groups of clamping assemblies (2) arranged on the frame (1) for clamping circuit boards, wherein the distance between the two groups of clamping assemblies (2) is adjustable, and the clamping assemblies (2) comprise a lower support plate (201), an upper pressing plate (202) hingedly arranged on the lower support plate (201), and a driving component (204) for driving the upper pressing plate (202) to deflect to achieve clamping / loosening.

2. The fixture device for a probe machine according to claim 1, characterized in that: The upper pressing plate (202) is provided with a plurality of force-releasing grooves (203).

3. The fixture device for a probe machine according to claim 1, characterized in that: The clamping opening of the upper pressing plate (202) is in an inverted V shape.

4. The fixture device for a probe machine according to claim 1, characterized in that: The driving component (204) comprises a box frame (2041) arranged on the lower support plate (201), an abutment member (2047) arranged on the upper pressure plate (202), and a push block (2046) abutting against the abutment member (2047), wherein the abutment member (2047) has an arc, a first guide rail (2044) and an integrated electric cylinder (2042) capable of displacement and force control feedback are arranged on the box frame (2041), a slider (2045) is slidably arranged on the first guide rail (2044), the slider (2045) is connected to the push block (2046), and a push rod (2043) is arranged between the driving end of the integrated electric cylinder (2042) and the push block (2046); The driving component (204) also includes a plurality of magnetic attraction groups for driving the upper pressure plate (202) to deflect and loosen, the magnetic attraction group including a first magnetic attraction member (2048) provided on the lower support plate (201) and a second magnetic attraction member (2049) provided on the upper pressure plate (202), the first magnetic attraction member (2048) and the second magnetic attraction member (2049) being arranged opposite to each other.

5. The fixture device for a probe machine according to claim 4, characterized in that: The tail end of the integrated electric cylinder (2042) is connected to the box frame (2041), and a joint bearing (20410) is provided between the tail end of the integrated electric cylinder (2042) and the box frame (2041).

6. The fixture device for a probe machine according to claim 1, characterized in that: The clamp device also includes a distance adjustment component (3) for adjusting the distance between the two groups of clamping components (2).

7. The fixture device for a probe machine according to claim 6, characterized in that: The distance adjustment assembly (3) comprises at least one second guide rail (301) arranged on the frame (1); two slide seats (304) are slidably arranged on the second guide rail (301); the two slide seats (304) are respectively connected to the lower support plates (201) in the two groups of clamping assemblies (2); the frame (1) is also provided with a second guide rail (301) and a driving member (303) for driving the forward and reverse threaded screws (302) to rotate; the forward threaded section and the reverse threaded section of the forward and reverse threaded screws (302) are both provided with connecting seats (305) in a threaded matching manner; the two connecting seats (305) are respectively fixedly connected to the two slide seats (304).

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