A large-range high-precision movable weighing platform

Abstract

The utility model relates to the technical field of PCB processing, especially a large range high accuracy movable type weighing platform, including frame and fixed roll weighing module on the frame, the roll weighing module includes weighing unit and sets up on the roll assembly of weighing unit, the roll assembly is by the fixed frame and the multiple roll of array on the fixed frame is composed, the roll is rotatably connected in the fixed frame, the fixed frame is fixed in the measuring end of weighing unit, when using the utility model, through the tray translationally shifts to the roll weighing module, the operation efficiency is high, reduces the labor intensity, reduces the risk of scattering.

Description

Technical Field

[0001] This utility model relates to the field of PCB processing technology, and in particular to a large-range, high-precision, movable weighing platform. Background Technology

[0002] In the manufacturing process of PCBs (Printed Circuit Boards, Power Control Panels, etc., depending on the specific application), the stacking process is a crucial step in ensuring product assembly accuracy and performance stability. The core requirement of this process is to pre-stack PCB components onto a tray in a predetermined quantity and verify the accuracy of the stacked quantity through weighing. This involves quickly identifying anomalies such as too many (excessive) or too few (insufficient) stacked components by determining whether the total weight of the stacked components falls within a preset standard weight range. This prevents defective components from flowing into subsequent cutting and assembly processes, thereby reducing production losses and improving product yield. Currently, the industry generally adopts the "direct weighing method" for weighing and verifying PCB stacks: the operator manually lifts the entire pallet carrying the pre-stacked PCBs and transfers it to a fixed weighing module (such as an electronic scale, pressure sensor weighing platform, etc.). The weighing module collects the total weight data of the pallet and PCBs and compares it with the preset "standard pallet weight + standard number of PCB unit weight" to complete the quantity compliance judgment. However, the aforementioned existing technical solutions have the following significant drawbacks: High labor intensity: The pallet itself and the pre-stacked PCB stacks have a certain weight. Operators need to repeatedly perform the heavy operation of "lifting-transferring-placing". Long-term operation can easily lead to muscle fatigue and strain, reducing operating efficiency. Stacked materials are prone to scattering: During manual lifting and transfer, the pallet lacks a stable support and positioning structure. It is easy for the pallet to tilt due to operation shaking and uneven force, which in turn causes the pre-stacked PCB workpieces to shift, slip, or become loosely stacked. This not only affects the accuracy of the weighing data (scattered workpieces are not included in the weighing), but may also cause the PCB edges to be bumped and damaged, increasing the risk of product scrapping. Poor operational consistency: During manual transfer, the position and angle of the pallet placed on the weighing module lack a uniform standard, which may cause the force point of the weighing module to shift, resulting in weighing errors and reducing the reliability of quantity judgment. At the same time, the inconsistent speed and rhythm of manual operation will also affect the cycle stability of the entire production line, making it difficult to adapt to the needs of large-scale and automated production. In summary, existing PCB stacking weighing methods rely on manual pallet transfer and weighing operations. While these methods can achieve basic quantity verification, they suffer from technical problems such as high labor intensity, easy material scattering, and poor operational consistency. These issues severely restrict the production efficiency, product yield, and automation level of the PCB stacking process, and fail to meet the demands of modern manufacturing for efficient, stable, and low-loss production. Therefore, there is an urgent need for a PCB stacking weighing technology solution that can address these shortcomings. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a large-range, high-precision, mobile weighing platform.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The present invention discloses a large-range, high-precision, movable weighing platform, comprising a frame and a roller weighing module fixed on the frame; the roller weighing module includes a weighing unit and a roller assembly disposed on the weighing unit; the roller assembly consists of a fixed frame and multiple rollers arranged on the fixed frame; the rollers are rotatably connected to the fixed frame; the fixed frame is fixed to the measuring end of the weighing unit.

[0005] Furthermore, the roller weighing module also includes two L-shaped plates arranged symmetrically; the L-shaped plates are fixed on a fixing frame.

[0006] Furthermore, movable rods are hinged to both sides of the fixed frame; and limit blocks are fixed to the ends of the movable rods.

[0007] Furthermore, guide rods are fixed on both sides of the fixing frame; connecting plates are slidably connected to the guide rods; and profiles are fixed between the two connecting plates. The L-shaped plates are all fixed to the profile; each of the connecting plates is provided with threaded holes; and a second handle bolt is threaded into the threaded hole.

[0008] Furthermore, the profile is provided with a T-slot; a nut is slidably connected inside the T-slot; a through hole is provided on the L-shaped plate; and a bolt is threadedly connected to the nut inside the T-slot after passing through the through hole.

[0009] Furthermore, a transverse guide rail parallel to the profile is fixed on the frame; two adjusting sliders are slidably connected on the transverse guide rail; a laser mounting base is fixed on the adjusting slider; a first handle bolt is threaded onto each adjusting slider; the end of the first handle bolt is pressed against the transverse guide rail; a laser is fixed on the laser mounting base; and a scale parallel to the transverse guide rail is fixed on the frame.

[0010] Furthermore, a fixing rod is fixed on the frame; a longitudinal guide rail is provided on the fixing rod; an adjusting slider is slidably connected to the longitudinal guide rail; a laser mounting base is fixed on the adjusting slider; a first handle bolt is threaded onto each adjusting slider; the end of the first handle bolt abuts against the longitudinal guide rail; a laser is fixed on the laser mounting base; and a scale parallel to the longitudinal guide rail is fixed on the frame.

[0011] With the above structure, the beneficial effects of this utility model are as follows: the top surface of the trolley and the top surface of the roller are at the same horizontal height, allowing the pallet to be pushed flat onto the surface of the roller assembly; then the weighing unit weighs the entire roller weighing module, the pallet, and the materials on the pallet together. After obtaining the weight, the weighing unit compares it with the set value to determine whether the weight of the material on the pallet is within the standard range and whether the quantity of material on the pallet is consistent with the standard quantity; after weighing, the pallet is pulled out from the weighing unit onto the trolley. In this structure, by transferring the pallet horizontally to the roller weighing module, the operation efficiency is high, the labor intensity is reduced, and the risk of spillage is reduced. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural diagram of the laser alignment structure connected to the frame; Figure 3 This is a structural diagram of the roller weighing module; Figure 4 yes Figure 3 Enlarged view of part A in the image; Explanation of reference numerals in the attached figures: 1. Fixing rod; 101. Laser mounting base; 102. Adjusting slider; 103. First handle bolt; 104. Horizontal guide rail; 105. Longitudinal guide rail; 2. Roller weighing module; 201. L-shaped plate; 20101, Through hole; 202, Profile; 20201, T-slot; 203, Second handle bolt; 204. Connecting plate; 205. Sliding sleeve; 206. Guide rod; 207. Fixing frame; 208. Movable rod; 209. Weighing unit; 2010. Roller; 2011. Limit block; 3. Frame. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figures 1 to 4As shown, the present invention discloses a large-range, high-precision, movable weighing platform, comprising a frame 3 and a roller weighing module 2 fixed on the frame 3; the roller weighing module 2 includes a weighing unit 209 and a roller assembly disposed on the weighing unit 209; the roller assembly consists of a fixed frame 207 and multiple rollers 2010 arranged on the fixed frame 207; the rollers 2010 are rotatably connected to the fixed frame 207; the fixed frame 207 is fixed to the measuring end of the weighing unit 209; The weighing unit 209 is not fundamentally different from existing technology, so it will not be discussed in detail. The top surface of the trolley is at the same horizontal level as the top surface of the roller 2010, allowing the pallet to be pushed flat onto the surface of the roller assembly. Then, the weighing unit 209 weighs the entire roller weighing module 2, the pallet, and the materials on the pallet together. After obtaining the weight, the weighing unit 209 compares it with the set value to determine whether the weight of the materials on the pallet is within the standard range and whether the quantity of materials on the pallet is consistent with the standard quantity. After weighing, the pallet is pulled out from the weighing unit 209 onto the trolley.

[0015] In this structure, by transferring the pallet horizontally to the roller weighing module 2, the operation efficiency is high, the labor intensity is reduced, and the risk of spillage is reduced.

[0016] As a preferred embodiment of the present invention, the roller weighing module 2 further includes two L-shaped plates 201 arranged symmetrically; the L-shaped plates 201 are fixed on the fixing frame 207. The L-shaped plate 201 has an "L"-shaped cross section. The two apex corners of the two L-shaped plates 201 are used to position the pallet on the roller weighing module 2, making the weighing position of the pallet on the roller weighing module 2 more accurate, the operation more consistent, reducing the risk of weighing errors caused by force point deviation, and improving weighing accuracy.

[0017] In a preferred embodiment of this utility model, movable rods 208 are hinged to both sides of the fixing frame 207; limit blocks 2011 are fixed to the ends of the movable rods 208; the movable rods 208 can be flipped to the inside of the fixing frame 207 or to the outside of the fixing frame 207. Before the pallet enters the fixed frame 207 or is about to be pulled out of the fixed frame 207, the movable rod 208 needs to be flipped to the outside of the fixed frame 207 to ensure that the limit block 2011 will not block the pallet from entering or exiting; when the pallet enters the fixed frame 207 and is in the weighing state, the movable rod 208 flips to the inside of the fixed frame 207 to prevent the pallet from sliding out of the fixed frame 207.

[0018] In a preferred embodiment of this utility model, guide rods 206 are fixed on both sides of the fixing frame 207; connecting plates 204 are slidably connected to the guide rods 206; and a profile 202 is fixed between the two connecting plates 204. The L-shaped plates 201 are all fixed on the profiles 202; the connecting plates 204 are all provided with threaded holes; and the threaded holes are threaded with second handle bolts 203. A sliding sleeve 205 matching the guide rod 206 is fixed on the connecting plate 204; both ends of the profile 202 are respectively fixed on the two connecting plates 204; The second handle bolt 203 is locked behind the guide rod 206, preventing the connecting plate 204 from sliding on the guide rod 206. After loosening the second handle bolt 203, the position of the connecting plate 204 on the guide rod 206 can be adjusted, allowing the L-shaped plate 201 to be adjusted in the front and back position to match trays of different lengths.

[0019] In a preferred embodiment of this utility model, the profile 202 is provided with a T-slot 20201; a nut is slidably connected inside the T-slot 20201; the L-shaped plate 201 is provided with a through hole 20101; a bolt passes through the through hole 20101 and is threadedly connected to the nut inside the T-slot 20201; The cross-section of the T-slot 20201 is T-shaped and it runs through both ends of the profile 202; After loosening the bolts, the nut can slide within the T-slot 20201 to adjust the distance between the two L-shaped plates 201, thus accommodating pallets of different widths.

[0020] In a preferred embodiment of this utility model, a transverse guide rail 104 parallel to the profile 202 is fixed on the frame 3; two adjusting sliders 102 are slidably connected to the transverse guide rail 104; a laser mounting base 101 is fixed on the adjusting slider 102; a first handle bolt 103 is threaded onto each adjusting slider 102; the end of the first handle bolt 103 abuts against the transverse guide rail 104; a laser is fixed on the laser mounting base 101; and a scale parallel to the transverse guide rail 104 is fixed on the frame 3. The laser can emit a line of laser light, which can provide a reference for adjusting the L-shaped plate 201 in the width direction; after loosening the first handle bolt 103, the adjusting slider 102 can slide on the transverse guide rail 104 to adjust the laser's output line in the transverse position.

[0021] In a preferred embodiment of this utility model, a fixing rod 1 is fixed on the frame 3; a longitudinal guide rail 105 is provided on the fixing rod 1; an adjusting slider 102 is slidably connected to the longitudinal guide rail 105; a laser fixing seat 101 is fixed on the adjusting slider 102; a first handle bolt 103 is threadedly connected to each adjusting slider 102; the end of the first handle bolt 103 abuts against the longitudinal guide rail 105; a laser is fixed on the laser fixing seat 101; and a scale parallel to the longitudinal guide rail 105 is fixed on the frame 3. The laser emits a linear laser line, providing a reference for adjusting the L-shaped plate 201 in the length direction. After loosening the first handle bolt 103, the adjusting slider 102 can slide on the longitudinal guide rail 105 to adjust the laser's output line in the longitudinal position. This is applied to the position adjustment of the L-shaped plate 201 in the tray length direction.

[0022] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A large-range, high-precision, movable weighing platform, characterized in that: It includes a frame (3) and a roller weighing module (2) fixed on the frame (3); the roller weighing module (2) includes a weighing unit (209) and a roller assembly disposed on the weighing unit (209); the roller assembly consists of a fixed frame (207) and multiple rollers (2010) arranged on the fixed frame (207); the rollers (2010) are rotatably connected to the fixed frame (207); the fixed frame (207) is fixed to the measuring end of the weighing unit (209).

2. The large-range, high-precision, movable weighing platform according to claim 1, characterized in that: The roller weighing module (2) also includes two L-shaped plates (201) arranged symmetrically; the L-shaped plates (201) are fixed on the fixing frame (207).

3. The large-range, high-precision, movable weighing platform according to claim 2, characterized in that: Both sides of the fixed frame (207) are hinged with movable rods (208); the ends of the movable rods (208) are fixed with limit blocks (2011).

4. A large-range, high-precision, movable weighing platform according to claim 2, characterized in that: Guide rods (206) are fixed on both sides of the fixing frame (207); connecting plates (204) are slidably connected to the guide rods (206); and profiles (202) are fixed between the two connecting plates (204). The L-shaped plates (201) are all fixed on the profile (202); the connecting plates (204) are all provided with threaded holes; and the threaded holes are threaded with second handle bolts (203).

5. A large-range, high-precision, movable weighing platform according to claim 4, characterized in that: The profile (202) is provided with a T-slot (20201); a nut is slidably connected inside the T-slot (20201); the L-shaped plate (201) is provided with a through hole (20101); a bolt passes through the through hole (20101) and is threadedly connected to the nut inside the T-slot (20201).

6. A large-range, high-precision, movable weighing platform according to claim 5, characterized in that: The frame (3) is fixed with a transverse guide rail (104) parallel to the profile (202); two adjusting sliders (102) are slidably connected on the transverse guide rail (104); a laser mounting base (101) is fixed on the adjusting slider (102); a first handle bolt (103) is threaded onto each adjusting slider (102); the end of the first handle bolt (103) is pressed against the transverse guide rail (104); a laser is fixed on the laser mounting base (101); a scale parallel to the transverse guide rail (104) is fixed on the frame (3).

7. A large-range, high-precision, movable weighing platform according to claim 4, characterized in that: A fixing rod (1) is fixed on the frame (3); a longitudinal guide rail (105) is provided on the fixing rod (1); an adjusting slider (102) is slidably connected on the longitudinal guide rail (105); a laser mounting base (101) is fixed on the adjusting slider (102); a first handle bolt (103) is threaded onto each adjusting slider (102); the end of the first handle bolt (103) is pressed against the longitudinal guide rail (105); a laser is fixed on the laser mounting base (101); a scale parallel to the longitudinal guide rail (105) is fixed on the frame (3).

Images