A load cell calibration apparatus

Abstract

The utility model relates to a kind of weighing inductor correction equipment, including correction platform, and the placing table for the positioning placement of weighing inductor body is equipped on correction platform, and the clamping mechanism for the clamping of weighing inductor body is equipped on placing table, and top frame is fixed in correction platform upper side through stand column, and top frame lower side is equipped with three-axis moving group, and the bottom end of three-axis moving group is equipped with inserting rod, and the weight is detachably assembled on inserting rod by clamping mechanism, and three-axis moving group is used to drive weight to adjust front and back, left and right, up and down.The utility model is loaded on pressure plate when the weight below, using inserting rod and weight clamping, inserting rod is rod body, structure is stable, to avoid deformation in the process of shifting weight and cause weight placement position to deviate, effectively guarantee the accuracy when correcting, after releasing weight and loading on pressure plate, the weight can be released, so that weight is loaded on pressure plate alone, reduce the interference of other components.

Description

Technical Field

[0001] This utility model relates to the field of weighing sensor calibration technology, specifically a weighing sensor calibration device. Background Technology

[0002] The four-corner error correction method for weighing sensors eliminates inconsistencies in the measured values ​​at the four corners of the weighing platform caused by sensor installation deviations, uneven support structures, or environmental factors through calibration techniques. Its core steps include: loading standard weights at each of the four corners of the platform, collecting the differences in the output signals at each corner, and then adjusting the output values ​​of the weighing sensor at the four corners by filing and grinding the area corresponding to the corner with the largest data difference on the strain gauge holes.

[0003] Referring to Chinese invention patent application number 201810043817.5, a four-corner error correction device for a weighing sensor is disclosed. The piston rod of this correction device has a hook fixed to its end via a rope, used to hang a counterweight to move and adjust the counterweight. However, the rope is flexible, and during movement, mechanical vibration or inertia can cause the weight to shift, reducing the accuracy of the correction device. Utility Model Content

[0004] The purpose of this invention is to provide a weighing sensor calibration device that effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A weighing sensor calibration device includes a calibration platform with a placement platform for positioning the weighing sensor body. The placement platform is equipped with a clamping mechanism for clamping the weighing sensor body. A top frame is fixed above the calibration platform by a column, and a three-axis moving assembly is provided below the top frame. The bottom end of the three-axis moving assembly is provided with an insertion rod, and a weight is detachably mounted on the insertion rod by a clamping mechanism. The three-axis moving assembly is used to drive the weight to adjust forward, backward, left, right, up, and down. During calibration, a pressure plate is installed on the weighing sensor body.

[0007] Furthermore, the holding mechanism includes a miniature electric push cylinder, a pressing end, a locking rod, and an arc-shaped head. The top of the weight has an insertion hole for the matching insertion rod. An annular groove is provided on the inner wall of the insertion hole. The insertion rod has an inner cavity. The miniature electric push cylinder is vertically fixed on the top wall of the inner cavity. The pressing end is fixed on the end of the telescopic rod of the miniature electric push cylinder. The diameter of the pressing end decreases as it goes down. Two sliding holes communicating with the inner cavity are symmetrically provided on the insertion rod. Locking rods are slidably installed in both sliding holes. The ends of the two locking rods that are close to each other extend into the inner cavity and are fixed with arc-shaped heads. The two arc-shaped heads are distributed on both sides of the pressing end and are pressed and engaged with the outer wall of the pressing end. The two locking rods are locked and engaged with the annular groove.

[0008] Furthermore, the cross-section of the annular groove is V-shaped.

[0009] Furthermore, the top of the socket has a guide bevel.

[0010] Furthermore, a vertically extending stop is fixed at the bottom of the extrusion end, with two arc-shaped heads distributed on both sides of the stop.

[0011] Furthermore, the clamping mechanism includes a bidirectional threaded rod, a drive motor, nut seats, and clamps. A drive groove is provided on the placement platform. The bidirectional threaded rod is rotatably installed in the drive groove. The two nut seats are slidably installed in the drive groove and threadedly fitted on both sides of the bidirectional threaded rod. Clamps are fixed to the top of the two nut seats respectively. The drive motor is fixed to one side of the placement platform, and its output shaft is fixedly connected to one end of the bidirectional threaded rod.

[0012] Furthermore, two nut seats are symmetrically fitted onto the double-threaded rod.

[0013] Furthermore, the three-axis moving assembly includes a first power guide rail, a second power guide rail, and a lifting cylinder. The first power guide rail is fixed on the lower surface of the top frame and has a first movable seat that can move back and forth. The second power guide rail is fixed at the bottom end of the first movable seat and has a second movable seat that can move left and right. The lifting cylinder is vertically fixed at the bottom end of the second movable seat, and the insertion rod is installed on the end of the telescopic rod of the lifting cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0015] This invention utilizes a rod to hold the weight in place when it is loaded onto the pressure plate. The rod is a sturdy structure that prevents deformation during weight transfer, thus avoiding displacement of the weight's position and ensuring accuracy during calibration.

[0016] This invention allows the weight to be released after it has been loaded onto the pressure plate, separating the rod from the weight. This enables the weight to be loaded onto the pressure plate alone, reducing interference from other components and further improving the accuracy of the calibration of the weighing sensor. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 A schematic diagram of the clamping device during weighing sensor calibration;

[0019] Figure 3 This is a schematic diagram of the three-axis moving assembly structure in this utility model;

[0020] Figure 4This is a schematic diagram of the clamping mechanism in this utility model.

[0021] In the diagram: 01, Weighing sensor body; 011, Strain gauge hole; 02, Pressure plate; 1, Calibration platform; 11, Column; 12, Top frame; 2, Placement platform; 3, Clamping mechanism; 301, Drive slot; 31, Bidirectional threaded rod; 32, Drive motor; 33, Nut seat; 34, Clamping seat; 4, Three-axis moving assembly; 41, First power guide rail; 42, First moving seat; 43, Second power guide rail; 44, Second moving seat; 45, Lifting cylinder; 5, Insert rod; 51, Inner cavity; 52, Sliding hole; 6, Weight; 61, Insertion hole; 62, Annular groove; 63, Guide slope; 7, Clamping mechanism; 71, Miniature electric push cylinder; 72, Extrusion end; 73, Clamping rod; 74, Arc-shaped head; 75, Stop bar. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0024] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0025] Please see Figures 1-4This utility model provides a weighing sensor calibration device, including a calibration platform 1, a placement platform 2 for positioning the weighing sensor body 01 on the calibration platform 1, a clamping mechanism 3 for clamping the weighing sensor body 01 on the placement platform 2, a top frame 12 fixed above the calibration platform 1 by a column 11, a three-axis moving assembly 4 below the top frame 12, an insertion rod 5 at the bottom end of the three-axis moving assembly 4, a weight 6 detachably mounted on the insertion rod 5 by a clamping mechanism 7, the three-axis moving assembly 4 is used to drive the weight 6 to adjust back, forth, left, right, up and down, during calibration, a pressure plate 02 is installed on the weighing sensor body 01.

[0026] When calibrating the weighing sensor body 01 using the four-corner error correction method, the weighing sensor body 01 is first placed on the placement platform 2 and clamped by the clamping mechanism 3 to ensure stability during calibration. Then, the pressure plate 02 is installed on the weighing sensor body 01. Subsequently, the weight 6 is clamped to the end of the insertion rod 5 using the clamping mechanism 7. The three-axis moving group 4 drives the weight 6 to move and adjust to each corner of the pressure plate 02, and the test data is recorded. Then, the corner position with the larger difference in data on the strain gauge hole 011 is filed and polished. The filing and polishing can be done manually or automatically by machine. The polishing method adopts the existing technology, which will not be described in detail in this application. Finally, the calibration of the weighing sensor body 01 is completed.

[0027] When the weight 6 is loaded onto the pressure plate 02, it is held in place by the insert rod 5. The insert rod 5 is a rod body with a stable structure, which avoids deformation during the transfer of the weight 6 and thus prevents the weight 6 from shifting in position, effectively ensuring the accuracy of the calibration.

[0028] Specifically, the holding mechanism 7 includes a miniature electric push cylinder 71, a pressing end 72, a locking rod 73, and an arc-shaped head 74. The top of the weight 6 has an insertion hole 61 for the insertion rod 5 to be inserted. The inner wall of the insertion hole 61 is provided with an annular groove 62. The insertion rod 5 has an inner cavity 51. The miniature electric push cylinder 71 is vertically fixed to the top wall of the inner cavity 51. The pressing end 72 is fixed to the end of the telescopic rod of the miniature electric push cylinder 71. The diameter of the pressing end 72 decreases towards the bottom. The insertion rod 5... Two symmetrical sliding holes 52 communicating with the inner cavity 51 are provided on the upper part. A locking rod 73 is slidably installed in each of the two sliding holes 52. The ends of the two locking rods 73 that are close to each other extend into the inner cavity 51 and are fixed with arc-shaped heads 74. The two arc-shaped heads 74 are distributed on both sides of the extrusion end 72 and are extruded and engaged with the outer wall of the extrusion end 72. The two locking rods 73 are engaged with the annular groove 62. The annular groove 62 has a V-shaped cross section and the top of the insertion hole 61 has a guide slope 63.

[0029] When the insertion rod 5 is inserted into the insertion hole 61, the miniature electric push cylinder 71 first retracts, causing the pressing end 72 to move upward and reset. When the insertion rod 5 is inserted into the insertion hole 61, the guide inclined surface 63 and the end of the clamping rod 73 are pressed together, causing the clamping rod 73 to retract into the sliding hole 52, avoiding obstruction and interference to the insertion of the insertion rod 5 into the insertion hole 61. Then, after the insertion rod 5 is inserted into place, the miniature electric push cylinder 71 extends, pushing the pressing end 72 downward. The pressing end 72 presses the two arc-shaped heads 74 downward, thereby pushing the two clamping rods 73 to slide out and correspondingly engage in the annular groove 62, realizing the clamping of the insertion rod 5 and the weight 6, which facilitates the movement and adjustment of the weight 6.

[0030] By retracting the extrusion end 72, the extrusion end 72 moves upward, thus canceling the extrusion end 72's extrusion on the arc-shaped head 74. As the insertion rod 5 moves upward, the locking rod 73 retracts into the sliding hole 52 under the extrusion action of the top wall inside the annular locking groove 62, thereby canceling the locking between the insertion rod 5 and the weight 6, thus realizing the release of the weight 6.

[0031] After the weight 6 is released and loaded onto the pressure plate 02, the weight 6 can be released to separate the insertion rod 5 and the weight 6, so that the weight 6 is loaded onto the pressure plate 02 alone, reducing interference from other components and further improving the accuracy of the calibration of the weighing sensor body 01.

[0032] Specifically, a vertically extending stop bar 75 is fixed at the bottom of the extrusion end 72, and two arc-shaped heads 74 are distributed on both sides of the stop bar 75. The stop bar 75 can be used to block and limit the two locking rods 73 during the retraction process, so as to prevent the two locking rods 73 from retracting excessively and completely disengaging from the sliding hole 52.

[0033] Specifically, the clamping mechanism 3 includes a bidirectional threaded rod 31, a drive motor 32, a nut seat 33, and a clamp 34. The placement platform 2 is provided with a drive groove 301. The bidirectional threaded rod 31 is rotatably installed in the drive groove 301. The two nut seats 33 are slidably installed in the drive groove 301 and threadedly fitted on both sides of the bidirectional threaded rod 31. The clamp 34 is fixed to the top of the two nut seats 33 respectively. The drive motor 32 is fixed to one side of the placement platform 2, and its output shaft is fixedly connected to one end of the bidirectional threaded rod 31.

[0034] The drive motor 32 operates, and its output shaft drives the bidirectional threaded rod 31 to rotate. The rotating bidirectional threaded rod 31 drives the two nut seats 33 to move away from or closer to each other along the drive groove 301, and drives the two clamps 34 to move synchronously, thereby realizing the clamping and releasing of the weighing sensor body 01.

[0035] Specifically, the two nut seats 33 are symmetrically mounted on the bidirectional threaded rod 31. The symmetrical arrangement of the two nut seats 33 ensures that the driving force is synchronized, thereby ensuring that the weighing sensor body 01 is clamped in the center.

[0036] Specifically, the three-axis moving assembly 4 includes a first power guide rail 41, a second power guide rail 43, and a lifting cylinder 45. The first power guide rail 41 is fixed on the lower surface of the top frame 12. The first power guide rail 41 has a first moving seat 42 that can move back and forth. The second power guide rail 43 is fixed at the bottom end of the first moving seat 42. The second power guide rail 43 has a second moving seat 44 that can move left and right. The lifting cylinder 45 is vertically fixed at the bottom end of the second moving seat 44. The insertion rod 5 is installed on the end of the telescopic rod of the lifting cylinder 45. The first moving seat 42 is driven to move back and forth by the operation of the first power guide rail 41, providing drive for the forward and backward translation of the weight 6. The second moving seat 44 is driven to move left and right by the operation of the second power guide rail 43, providing drive for the left and right translation of the weight 6. The insertion rod 5 is driven to move up and down by the operation of the lifting cylinder 45, providing drive for the lifting of the weight 6.

[0037] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. Furthermore, the specific structure, model and coefficient index of all its components are its own technology. As long as it can achieve its beneficial effect, it can be implemented. Therefore, it will not be described in detail.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A weighing sensor calibration device, comprising a calibration platform (1), wherein the calibration platform (1) is provided with a placement platform (2) for positioning and placing a weighing sensor body (01), characterized in that: The placement platform (2) is provided with a clamping mechanism (3) for clamping the weighing sensor body (01); A top frame (12) is fixed above the calibration platform (1) by a column (11), and a three-axis moving assembly (4) is provided below the top frame (12); The bottom end of the three-axis moving assembly (4) is provided with a plug rod (5), and a weight (6) is detachably mounted on the plug rod (5) through a clamping mechanism (7); The three-axis moving assembly (4) is used to drive the weight (6) to adjust its position in all directions. During calibration, the pressure plate (02) is mounted on the weighing sensor body (01).

2. The weighing sensor calibration device according to claim 1, characterized in that: The clamping mechanism (7) includes a miniature electric push cylinder (71), a pressing end (72), a clamping rod (73), and an arc-shaped head (74); The weight (6) has a socket (61) at the top for the insertion rod (5) to be inserted into, and an annular groove (62) is provided on the inner wall of the socket (61); The insert rod (5) has an inner cavity (51), and the miniature electric push cylinder (71) is vertically fixed on the top wall of the inner cavity (51); The telescopic rod of the miniature electric push cylinder (71) is fixed with a pressing end (72), and the diameter of the pressing end (72) decreases as it goes downwards; The insert (5) is symmetrically provided with two sliding holes (52) that communicate with the inner cavity (51), and the locking rod (73) is slidably installed in both sliding holes (52); The two clamps (73) extend into the inner cavity (51) at their closest points and are each fixed with the arc-shaped head (74). The two arc-shaped heads (74) are distributed on both sides of the extrusion end (72) and are both extruded into the outer wall of the extrusion end (72); The two locking rods (73) are engaged with the annular locking groove (62).

3. The weighing sensor calibration device according to claim 2, characterized in that: The cross-section of the annular groove (62) is V-shaped.

4. The weighing sensor calibration device according to claim 2, characterized in that: The top of the socket (61) has a guide bevel (63).

5. A weighing sensor calibration device according to claim 2, characterized in that: The bottom end of the extrusion end (72) is fixed with a vertically extending stop bar (75), and the two arc-shaped heads (74) are distributed on both sides of the stop bar (75).

6. The weighing sensor calibration device according to claim 1, characterized in that: The clamping mechanism (3) includes a bidirectional threaded rod (31), a drive motor (32), a nut seat (33), and a clamping seat (34); The placement platform (2) is provided with a drive groove (301), and the bidirectional threaded rod (31) is rotatably installed in the drive groove (301); The two nut seats (33) are slidably installed in the drive groove (301) and threadedly fitted on both sides of the bidirectional threaded rod (31); Each of the two nut seats (33) has a clamp (34) fixed to its top; The drive motor (32) is fixed to one side of the placement platform (2), and its output shaft is fixedly connected to one end of the bidirectional threaded rod (31).

7. A weighing sensor calibration device according to claim 6, characterized in that: The two nut seats (33) are symmetrically fitted onto the bidirectional threaded rod (31).

8. A weighing sensor calibration device according to claim 1, characterized in that: The three-axis moving assembly (4) includes a first power guide rail (41), a second power guide rail (43), and a lifting cylinder (45); The first power guide rail (41) is fixed on the lower surface of the top frame (12), and the first power guide rail (41) has a first movable seat (42) that can move back and forth. The second power guide rail (43) is fixed to the bottom end of the first movable seat (42), and the second power guide rail (43) has a second movable seat (44) that can move left and right; The lifting cylinder (45) is vertically fixed on the bottom end of the second movable seat (44), and the insertion rod (5) is installed on the end of the telescopic rod of the lifting cylinder (45).

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