A positioning device

Abstract

The present invention provides a positioning device, including a lifting mechanism and a control mechanism. The lifting mechanism includes a lifting platform and a first driving mechanism, and the lifting platform is driven by the first driving mechanism to perform an ascending or descending movement; the control mechanism is electrically connected to the first driving mechanism, and is used to send a control signal toward the first driving mechanism. According to the uniform height required by the lower clamp, this positioning device can control the first driver through the control mechanism to drive the lifting platform to rise to the uniform height required by the lower clamp. The lower clamp is fixed at the bottom of the slide bar. When the height of the lower clamp needs to be adjusted, the slide bar is released, and the lower clamp moves downward with the slide bar. The lower clamp stops moving when it descends to contact the upper surface of the lifting platform, and the uniform adjustment of the height of the lower clamp can be automatically achieved. The operation is simple, convenient, and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit board electroplating equipment, and in particular to a positioning device. Background Art

[0002] In the vertical electroplating production process of printed circuit boards, the circuit boards are usually clamped on the steel belt of the conveying mechanism by electroplating clamps. Driven by the steel belt, the circuit boards are moved in the electroplating tank to complete the electroplating process of the circuit boards. In the prior art, the electroplating clamps are used to clamp only the upper end of the circuit boards. When the circuit boards move with the steel belt, they will inevitably shake, thus affecting the electroplating effect of the circuit boards.

[0003] If a solution is adopted in which the circuit board is clamped simultaneously by two upper and lower clamps connected by a slide bar, when the lower clamp and the slide bar are fixedly connected, the upper clamp and the slide bar need to be adjustable.

[0004] Before the vertical electroplating process, the upper and lower clamps are used to clamp the circuit board to be electroplated for loading. The lower clamp is fixed at the lower end of the slide bar. Before loading, the lower clamp needs to be lowered to a uniform height.

[0005] In actual production, since there are many lower clamps used to fix the circuit board, it would be too cumbersome to debug them one by one manually. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the lower clamp for fixing the circuit board has to be manually adjusted which is cumbersome during loading, thereby providing a positioning device which can automatically adjust the height of the lower clamp.

[0007] The present invention provides a positioning device, comprising:

[0008] A lifting mechanism, comprising a lifting platform and a first driving mechanism, wherein the lifting platform is driven by the first driving mechanism to perform lifting or lowering motion;

[0009] The control mechanism is electrically connected to the first driving mechanism and is used to send a control signal toward the first driving mechanism.

[0010] Optionally, in the above-mentioned positioning device, a position sensor for detecting whether the lifting platform is in contact with the part to be positioned is provided on the lifting platform, and the position sensor is electrically connected to the control mechanism.

[0011] Optionally, in the above positioning device, the lifting mechanism comprises:

[0012] There are multiple supporting wheels, which are arranged on the upper surface of the lifting platform through a rotating shaft.

[0013] Optionally, in the above-mentioned positioning device, a groove suitable for accommodating the part to be positioned is provided on the outer side wall of the supporting wheel.

[0014] Optionally, in the above-mentioned positioning device, the first driving mechanism is a first cylinder, and the driving end of the first cylinder is connected to the lifting platform.

[0015] Optionally, the above positioning device further includes:

[0016] The pull-down mechanism comprises a second driving mechanism, a third driving mechanism and a grasping and pulling component; the grasping and pulling component is connected to the driving end of the third driving mechanism, and is driven by the third driving mechanism to make a linear motion along a first path toward or away from the object to be grasped and pulled;

[0017] The second driving mechanism is connected to the grabbing and pulling frame, the driving end of the second driving mechanism is connected to the third driving mechanism, and the third driving mechanism is driven by the second driving mechanism to perform an ascending or descending movement.

[0018] Optionally, in the above positioning device, the second driving mechanism includes:

[0019] Second stepper motor;

[0020] A second lead screw, the end of which is connected to the output shaft of the second stepping motor and is driven by the second stepping motor to perform rotational motion around the central axis;

[0021] A second slider is sleeved on the second lead screw and is adapted to perform linear motion under the rotation force of the second lead screw;

[0022] The second sliding block is provided with a second fixing plate, and the third driving mechanism is fixed on the second fixing plate.

[0023] Optionally, in the above-mentioned positioning device, a middle portion of an end of the grabbing component away from the third driving mechanism is concave to form an accommodating area for accommodating the component to be grabbed.

[0024] Optionally, the above positioning device further includes:

[0025] A fourth driving mechanism, whose driving end is connected to the grabbing and pulling frame, is used to drive the grabbing and pulling frame to perform translational motion along a direction perpendicular to the first driving mechanism, the second driving mechanism and the third driving mechanism.

[0026] Optionally, in the above positioning device, the fourth driving mechanism comprises:

[0027] Fourth stepper motor;

[0028] a fourth lead screw connected to an output end of the fourth stepping motor and adapted to perform axial rotational motion under the drive of the fourth stepping motor;

[0029] The fourth slider is threadedly connected to the fourth lead screw and is suitable for translational movement according to the rotation of the fourth lead screw. The fourth slider is fixedly connected to the grabbing and pulling frame.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. The positioning device provided by the present invention can control the first driver to drive the lifting platform to the uniform height required by the lower clamp according to the uniform height required by the lower clamp through the control mechanism. The lower clamp is fixed at the bottom of the slide bar. When the height of the lower clamp needs to be adjusted, the slide bar is released and the lower clamp moves downward with the slide bar. The lower clamp stops moving when it drops to contact the upper surface of the lifting platform, so the uniform adjustment of the height of the lower clamp can be automatically achieved. The operation is simple, convenient and efficient.

[0032] 2. The positioning device provided by the present invention has a plurality of supporting wheels on the lifting platform, and a groove is provided on the outer wall surface of each supporting wheel. The bottom of the lower clamp is embedded in the groove of the supporting wheel to realize accurate positioning of the lower clamp and prevent the lower clamp from shaking or shifting. At the same time, the supporting wheel is rotatably connected to the rotating shaft, and the lower clamp contacts with the supporting wheel. Compared with the direct contact between the lower clamp and the lifting platform, the friction can be reduced to prevent the lower clamp from wear. At the same time, the rotation of the supporting wheel can play a certain guiding and driving role in the forward movement of the lower clamp.

[0033] 3. The positioning device provided by the present invention, the pull-down mechanism includes a second drive mechanism, a third drive mechanism, a grabbing component and a fourth drive mechanism. The grabbing component is arranged at the driving end of the third drive mechanism, and it can be driven by the third drive mechanism to make horizontal movements toward or away from the direction of the component to be grabbed; the third drive mechanism is connected to the driving end of the second drive mechanism, and the second drive mechanism drives the third drive mechanism to make an upward or downward movement, thereby driving the grabbing component to rise or fall; the second drive mechanism is connected to the grabbing frame, and the driving end of the fourth drive mechanism is connected to the grabbing frame, and the fourth drive mechanism drives the grabbing frame to make horizontal movements perpendicular to the directions of the first drive mechanism, the second drive mechanism and the third drive mechanism, thereby driving the grabbing component to make corresponding horizontal movements. Driven by the second drive mechanism, the third drive mechanism and the fourth drive mechanism, the grabbing component can move along the three directions of X, Y and Z, and the movement direction is flexible. The corresponding movement direction can be selected according to the specific position of the component to be grabbed, so as to achieve accurate grabbing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A top view of the lifting mechanism of the positioning device;

[0036] Figure 2 It is a front view of the lifting mechanism of the positioning device;

[0037] Figure 3 It is a right side view of the lifting mechanism of the positioning device;

[0038] Figure 4 A top view of the pull-down mechanism of the positioning device;

[0039] Figure 5 It is a front view of the pull-down mechanism of the positioning device;

[0040] Figure 6 A right side view of the pull-down mechanism of the positioning device;

[0041] Figure 7 Right view of the lifting mechanism and the pull-down mechanism of the positioning device.

[0042] Description of reference numerals:

[0043] 1-lifting mechanism; 11-lifting platform; 12-first cylinder; 13-fixed seat; 14-supporting wheel; 15-rotating shaft;

[0044] 2-pull-down mechanism; 211-second stepping motor; 212-second lead screw; 213-second slider; 214-second fixing plate;

[0045] 22-second cylinder; 23-grasping component; 24-grasping frame; 241-upper plate; 242-lower plate; 243-side plate;

[0046] 251-fourth stepping motor; 252-fourth lead screw; 253-fourth slider;

[0047] 261-guide rod; 262-third slider; 263-fixed bracket; 264-connected bearing; 265-fifth slider; 266-slide rail; 267-fixed plate;

[0048] 3-slide bar; 4-lower clamp. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] This embodiment provides a positioning device, such as Figure 7 As shown, it includes a lifting mechanism 1, a pull-down mechanism 2 and a control mechanism.

[0054] like Figures 1 to 3 As shown, the lifting mechanism 1 includes a first driving mechanism and a lifting platform 11. The first driving mechanism is a first cylinder 12, and the control mechanism is a PLC control, which is electrically connected to the first cylinder 12, and the lifting platform 11 is fixed on the driving end of the first cylinder 12. The lifting mechanism 1 also includes two fixed seats 13 and a plurality of supporting wheels 14. Among them, the two fixed seats 13 are symmetrically fixed on the lifting platform 11, and a rotating shaft 15 is provided between the two fixed seats 13. The number of the rotating shaft 15 corresponds to the supporting wheels 14, and the supporting wheels 14 are rotatably mounted on the rotating shaft 15. A groove is provided in the middle of the circumferential outer wall of each supporting wheel 14. The bottom of the part to be positioned is embedded in the groove of the supporting wheel 14 to achieve accurate positioning and prevent the part to be positioned from shaking or shifting.

[0055] The positioning device of this structure can control the first driver through PLC control to drive the lifting platform to the uniform height required by the lower clamp according to the uniform height required by the lower clamp. The lower clamp is fixed at the bottom of the slide bar. When the height of the lower clamp needs to be adjusted, the slide bar is released and the lower clamp moves downward with the slide bar. The lower clamp stops moving when it drops to contact the upper surface of the lifting platform, which can automatically achieve uniform adjustment of the height of the lower clamp. The operation is simple, convenient and efficient.

[0056] When the part to be positioned is the lower fixture 4, the bottom of the lower fixture 4 is placed in the groove, the lower fixture 4 is fixed on the slide bar 3, and the slide bar 3 drives the lower fixture 4 forward as the steel belt drives forward. The setting of the supporting wheel 14 can reduce the friction between the lower fixture 4 and the lifting platform 11, prevent the lower fixture 4 from being worn, and the rotation of the supporting wheel 14 can guide and drive the forward movement of the lower fixture 4. The number of supporting wheels 14 is not limited, and the number can be one, two, three, four, etc., as long as it can carry the part to be positioned and reduce the friction between the part to be positioned and the lifting platform 11.

[0057] like Figures 4 to 6 As shown, the pull-down mechanism 2 includes a second driving mechanism, a third driving mechanism and a grabbing component 23 .

[0058] Specifically, the second driving mechanism includes a second stepping motor 211, a second lead screw 212, a second slider 213 and a second fixed plate 214. The second lead screw 212 is vertically arranged, and the end of the second lead screw 212 is connected to the output shaft of the second stepping motor 211, and is suitable for rotating around its central axis when driven by the second stepping motor 211. The second slider 213 is sleeved on the second lead screw 212, and is suitable for ascending or descending linear motion when subjected to the rotational force of the second lead screw 212; the second fixed plate 214 is arranged on the second slider 213.

[0059] The third driving mechanism is a second cylinder 22, which is fixed on the second fixing plate 214. The pulling component 23 is fixed on the driving end of the second cylinder 22. Figure 4 As shown, the middle part of the end of the grasping and pulling component 23 away from the second cylinder 22 is concave to form an accommodation area that can accommodate the component to be grasped and pulled 23. For example, the component to be grasped and pulled 23 is a slide bar 3. The grasping and pulling component 23 moves toward the slide bar 3 under the drive of the second cylinder 22 and the slide bar 3 is embedded in the accommodation area. The second stepping motor 211 drives the second fixing plate 214 to move downward, thereby driving the second cylinder 22 and the grasping and pulling component 23 to move downward. When the grasping and pulling component 23 moves to contact the lower clamp 4, the lower end surface of the grasping and pulling component 23 is clamped on the lower clamp 4, driving the lower clamp 4 to move downward to a required height.

[0060] like Figure 5As shown, the pull-down mechanism 2 also includes two guide rods 261, which are respectively arranged on both sides of the second lead screw 212 and are arranged parallel to the second lead screw 212 and on the same plane. Each guide rod 261 is provided with a third slider 262, for example, the third slider 262 is a linear bearing. The two ends of the second fixed plate 214 extend above the two guide rods 261 and are respectively arranged on the third slider 262. In the process of the second fixed plate 214 driving the second cylinder 22 to move upward or downward, the two ends of the second fixed plate 214 are arranged on the guide rods 261 through the third slider 262, which guides the movement of the second fixed plate 214. The second fixed plate 214 is arranged more stably, so that its up and down movement is more stable. The guide rod 261 can also be one, three, four, etc., as long as it can guide the up and down translation movement of the second fixed plate 214.

[0061] like Figure 6 As shown, the pull-down mechanism 2 further includes a grab-pull frame 24 and a fixed bracket 263. Specifically, the grab-pull frame 24 includes an upper plate 241, a lower plate 242 and a side plate 243. The end surfaces of the upper plate 241 and the lower plate 242 close to each other are respectively provided with a connecting bearing 264, and the upper and lower ends of the second lead screw 212 are sleeved in the connecting bearing 264. A fifth slider 265 is respectively provided on the upper and lower parts of the outer wall surface of the side plate 243 of the grab-pull frame 24, and a slide rail 266 cooperating with the fifth slider 265 is provided on the fixed bracket 263.

[0062] The pull-down mechanism 2 further includes a fourth driving mechanism. The fourth driving mechanism includes a fourth stepping motor 251, a fourth lead screw 252 and a fourth slider 253. The fourth lead screw 252 is connected to the output end of the fourth stepping motor 251 and is suitable for axial rotation under the drive of the fourth stepping motor 251; the fourth slider 253 is threadedly connected to the fourth lead screw 252 and is suitable for translation according to the rotation of the fourth lead screw 252.

[0063] The fixing bracket 263 is provided with a fixing plate 267, the fourth stepping motor 251 is fixed on the fixing plate 267, and the side plate 243 of the grabbing frame 24 is fixedly connected to the fourth slider 253. The fourth stepping motor 251 drives the fourth slider 253 to perform a translational motion perpendicular to the direction of the first cylinder 12, the second cylinder 22 and the second lead screw 212 (i.e. Figure 4 Movement in the left and right directions, Figure 7 translational motion perpendicular to the paper surface).

[0064] like Figure 7As shown, in the loading area, the slide bar 3 is set on the steel belt through the adjustment clamp, the steel belt is provided with an upper clamp, and the bottom of the slide bar 3 is provided with a lower clamp 4. The lifting mechanism 1 is fixed on the frame of the loading rack and is located directly below the lower clamp 4. When the height of the lower clamp 4 needs to be adjusted, the second cylinder 22 drives the grabbing and pulling component 23 to move toward the slide bar 3 for translation. The slide bar 3 is clamped in the accommodating area of ​​the grabbing and pulling component 23. The second stepper motor 211 drives the grabbing and pulling component 23 to move downward through the second fixed plate 214. When the grabbing and pulling component 23 moves downward to contact the upper end surface of the lower clamp 4, the grabbing and pulling component 23 continues to move downward, driving the lower clamp 4 and the slide bar 3 to move downward for a first distance, so that the position of the lower clamp 4 is lower than the preset height to be adjusted. Then, the first cylinder 12 drives the supporting wheel 14 to move upward according to the preset value. The supporting wheel 14 is provided with a position sensor electrically connected to the PLC control. When the supporting wheel 14 contacts the lower clamp 4, the position sensor can detect a signal. At this time, the second stepper motor 211 can be started to move the grabbing component 23 upward by a second distance, and under the joint action of the first cylinder 12 and the second stepper motor 211, the lower clamp 4 is moved to the precise height that needs to be adjusted.

[0065] The pull-down mechanism 2 determines the height of the lower fixture 4 by two actions: pulling down a first distance and rising a second distance during the rising process of the lifting mechanism 1, so that the height positioning of the lower fixture 4 is more accurate. The bottom of the lower fixture 4 is clamped in the groove of the supporting wheel 14, and the supporting wheel 14 supports the lower fixture 4 and the slide bar 3 to prevent the lower fixture 4 and the slide bar 3 from shaking during the process of installing the circuit board.

[0066] For example, when the lower fixture 4 needs to be lowered by 300 mm, the distance between the supporting wheel 14 of the lifting mechanism 1 and the lower fixture 4 at the initial position is set to 350 mm, and the lower fixture 4 is pulled down by 350 mm through the grabbing and pulling component 23, so that the lower fixture 4 contacts the lifting mechanism 1, and the position sensor detects the lower fixture 4. Then, the first cylinder 12 is started, and the grabbing and pulling component 23 is started to move upward, which together drive the lower fixture 4 to move upward by 50 mm, so that the lower fixture 4 can be accurately positioned.

[0067] During the pulling process of the grabbing and pulling component 23, the slide bar 3 and the lower clamp 4 continue to move forward with the steel belt, and the controller of the fourth stepper motor 251 can calculate the rotation speed of the fourth stepper motor 251 according to the output signal of the steel belt transmission, thereby driving the pull-down frame of the pull-down mechanism 2 to synchronously drive with the steel belt. The steel belt does not need to stop working during the positioning process, which can significantly improve production efficiency.

[0068] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A positioning device, characterized in that: include: A lifting mechanism (1), comprising a lifting platform (11) and a first driving mechanism, wherein the lifting platform (11) is driven by the first driving mechanism to perform lifting or lowering motion; a control mechanism, electrically connected to the first driving mechanism, and configured to send a control signal toward the first driving mechanism; The lifting platform (11) is provided with a position sensor for detecting whether the lifting platform (11) is in contact with the part to be positioned, and the position sensor is electrically connected to the control mechanism; The pull-down mechanism (2) comprises a second driving mechanism, a third driving mechanism and a grasping and pulling component (23); the grasping and pulling component (23) is connected to the driving end of the third driving mechanism and is driven by the third driving mechanism to perform a linear motion along a first path towards or away from an object to be grasped and pulled; The second driving mechanism is connected to the grabbing and pulling frame (24), the driving end of the second driving mechanism is connected to the third driving mechanism, and the third driving mechanism is driven by the second driving mechanism to perform an ascending or descending movement; The lifting mechanism (1) comprises: A plurality of supporting wheels (14) are arranged on the upper surface of the lifting platform (11) via a rotating shaft (15); a fourth driving mechanism, a driving end of which is connected to the grabbing and pulling frame (24), and is used to drive the grabbing and pulling frame (24) to perform translational movement along a direction perpendicular to the first driving mechanism, the second driving mechanism and the third driving mechanism; The middle part of the end of the grabbing component (23) away from the third driving mechanism is concave to form an accommodating area capable of accommodating the component to be grabbed (23).

2. The positioning device according to claim 1, characterized in that: The outer side wall of the supporting wheel (14) is provided with a groove suitable for accommodating the part to be positioned.

3. The positioning device according to claim 1 or 2, characterized in that: The first driving mechanism is a first cylinder (12), and a driving end of the first cylinder (12) is connected to the lifting platform (11).

4. The positioning device according to claim 1 or 2, characterized in that: The second driving mechanism comprises: A second stepping motor (211); A second lead screw (212), the end of which is connected to the output shaft of the second stepping motor (211), and is driven by the second stepping motor (211) to perform rotational motion around a central axis; A second sliding block (213) is sleeved on the second lead screw (212) and is adapted to perform linear motion under the rotational force of the second lead screw (212); A second fixing plate (214) is provided on the second sliding block (213), and the third driving mechanism is fixed on the second fixing plate (214).

5. The positioning device according to claim 1 or 2, characterized in that: The fourth driving mechanism comprises: Fourth stepper motor (251); a fourth lead screw (252), connected to the output end of the fourth stepping motor (251), and adapted to perform axial rotational motion under the drive of the fourth stepping motor (251); A fourth slider (253) is threadedly connected to the fourth lead screw (252) and is suitable for performing translational movement according to the rotation of the fourth lead screw (252). The fourth slider (253) is fixedly connected to the grabbing and pulling frame (24).

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