Weight lifting device for electronic scale verification

Abstract

The utility model discloses a weight elevating device used for electronic scale verification, comprising a work bench module, an elevating module and a grabbing module, the work bench module supports a work bench through four points of a support seat, and is provided with a column and an elevating rack; the lifting module comprises a cantilever beam, a motor and a transmission mechanism, and a gear is installed in the transmission mechanism and can be in meshing transmission with the lifting rack; the grabbing module is composed of a wedge mechanism and an air cylinder, wherein the wedge mechanism and the air cylinder are installed between the upper installation plate and the lower installation plate, and cylindrical weights are grabbed through cooperation of a driving wedge and a working wedge. According to the utility model, the horizontal state of the workbench can be adjusted, and the mechanical grabbing and placing of large-mass weights can be realized through the cooperation of the grabbing module and the lifting module, so that the safety and the working efficiency of electronic scale verification can be improved.

Description

Technical Field

[0001] This utility model relates to the field of metrological verification equipment technology, specifically to a weight lifting device for verifying electronic scales. Background Technology

[0002] The verification of electronic scales refers to the verification of non-automatic weighing instruments such as electronic platform scales and electronic bench scales that display values ​​in digital form, according to national metrological verification regulations. The verification of indication error and repeatability involves placing standard weights on the electronic scale, subtracting the reference value on the weights from the displayed value, and further determining whether the indication error or repeatability is within the required range or the maximum permissible error range, thus determining whether the electronic scale has passed verification. The verification of electronic scales can check whether scales used in trade settlement or in public welfare sectors such as healthcare meet legal requirements and ensure the accuracy of the measured values.

[0003] Currently, when calibrating electronic scales, weights are manually placed on the scale pan. When calibrating scales with large capacities, this requires repeated manual placement and removal of heavy weights, resulting in low efficiency and significant safety hazards. Some provincial metrology institutes have developed automatic calibration devices for electronic scales, which can automatically select, raise, and lower weights. However, these devices are expensive, heavy, and cumbersome to operate, making them unsuitable for large-scale field calibration work at grassroots metrology institutes. Therefore, there is an urgent need for a portable and cost-effective weight lifting device for electronic scale calibration. Summary of the Invention

[0004] The purpose of this utility model is to provide a weight lifting device for the calibration of electronic scales, so as to solve the problems mentioned in the background art, such as low calibration efficiency, high safety hazards, high cost and weight of large equipment, inconvenience for carrying out the trip, and cumbersome operation when using large mass weights to calibrate electronic scales.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a weight lifting device for electronic scale calibration, characterized in that it includes a workbench module, a lifting module, and a gripping module. The workbench module includes a workbench, a support base, a lifting rack, and a column. The support base and column are mounted on the workbench, and the lifting rack is mounted on the column and cooperates with the lifting module. The lifting module includes a cantilever beam, a motor, and a transmission mechanism. The motor and gripping module are mounted on the cantilever beam, and the transmission mechanism includes a coupling, a drive shaft, and a... The system includes a key, a lifting gear, and a round nut; the lifting gear can mesh with a lifting rack; the gripping module includes a lower mounting plate, an upper mounting plate, a cylinder, a limit block, and a wedge mechanism; the upper mounting plate is bolted to the cantilever beam; the cylinder and the wedge mechanism are threadedly connected and both mounted on the lower mounting plate; the wedge mechanism includes an active wedge, a working wedge, a weight gripper, a guide post, and a rolling bearing; the active wedge and two working wedges cooperate; the weight gripper and the guide post are both mounted on the working wedge; and the rolling bearing is mounted on the guide post.

[0006] As a preferred embodiment, the number of support seats is four, which are respectively connected to the threaded holes at the four corners of the workbench, with the upper threaded portion and the lower rubber pad portion of the support seat.

[0007] As a preferred embodiment, the workbench is made of extruded aluminum profile, and the column is bolted to the workbench and the lifting rack; a rectangular guide rail is designed on the outer side of the column.

[0008] As a preferred embodiment, the cantilever beam is designed with a "U"-shaped limiting hole, through which the cantilever beam can be fitted onto the column. The "U"-shaped limiting hole of the cantilever beam is designed with a lifting limiting guide groove, which can cooperate with the rectangular guide rail on the outer side of the column.

[0009] As a preferred embodiment, one end of the transmission mechanism is connected to the motor via a coupling, and the other end is connected to the lifting gear and the lifting rack via a lifting gear meshing.

[0010] As a preferred embodiment, the lifting gear in the transmission mechanism is circumferentially fixed by a flat key and axially fixed by a shoulder and a round nut designed on the transmission shaft.

[0011] As a preferred embodiment, the working wedge is designed with a "T"-shaped guide groove, which can be matched with the "T"-shaped guide rails designed on the two working wedges.

[0012] As a preferred embodiment, the lower mounting plate is designed with a guide groove, which can cooperate with the rolling bearing mounted on the guide post.

[0013] As a preferred embodiment, the limiting block is made of rubber and is installed with an interference fit to the guide groove designed on the lower mounting plate.

[0014] As a preferred embodiment, the gripper shape at the front end of the weight gripper is designed based on the gripping mechanism at the top of the cylindrical weight, and various weight grippers can be designed to match different weights of different masses.

[0015] The beneficial effects of this utility model after adopting the above structure are as follows: the workbench is made of aluminum alloy extruded profile, which is lightweight and easy to carry. The workbench has a four-point support base, which means that the application is no longer limited to a horizontal base plate. The horizontal state of the workbench can be adjusted by the thread of the support base.

[0016] 1. A gripping module is set up. Through the cooperation of a cylinder and a wedge mechanism, it is possible to grip and place large-mass cylindrical weights, thereby improving the efficiency and safety of weight use.

[0017] 2. Equipped with a lifting module, the meshing of the lifting gear and lifting rack in the transmission mechanism, through the forward and reverse rotation of the motor, can realize the raising and lowering of the cantilever beam, further realizing the placement and removal of weights, and improving overall work efficiency;

[0018] 3. All bolt connections are existing standard parts connections, and the design of many guide rails and guide rail grooves is based on existing mature technology. The lubrication method is grease lubrication to minimize production costs and reduce the overall cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the workbench module structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the lifting rack installation structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the lifting module structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the transmission mechanism structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the grasping module structure of this utility model;

[0025] Figure 7 This is an exploded view of the gripping module structure of this utility model.

[0026] In the diagram: 1. Workbench module; 11. Workbench; 12. Support base; 13. Lifting rack; 14. Column; 2. Lifting module; 21. Cantilever beam; 22. Motor; 23. Transmission mechanism; 231. Coupling; 232. Drive shaft; 233. Flat key; 234. Lifting gear; 235. Round nut; 3. Gripping module; 31. Lower mounting plate; 32. Upper mounting plate; 33. Cylinder; 34. Limit block; 35. Wedge mechanism; 351. Active wedge; 352. Working wedge; 353. Weight gripper; 354. Guide column; 355. Rolling bearing. Detailed Implementation

[0027] 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.

[0028] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, and back, are based on the directions shown in the figures of this utility model, and are explained here together.

[0029] like Figure 1-7 The illustrated weight lifting device for electronic scale calibration is characterized by comprising a workbench module 1, a lifting module 2, and a gripping module 3. The workbench module 1 includes a workbench 11, a support base 12, a lifting rack 13, and a column 14. The support base 12 and column 14 are mounted on the workbench 11, and the lifting rack 13 is mounted on the column 14 and cooperates with the lifting module 2. The lifting module 2 includes a cantilever beam 21, a motor 22, and a transmission mechanism 23. The motor 22 and the gripping module 3 are mounted on the cantilever beam 23. The transmission mechanism 23 includes a coupling 231, a drive shaft 232, a flat key 233, a lifting gear 234, and a round nut 235. Gear 234 can mesh with lifting rack 13; gripping module 3 includes lower mounting plate 31, upper mounting plate 32, cylinder 33, limit block 34 and wedge mechanism 35. Upper mounting plate 32 is bolted to cantilever beam 21. Cylinder 33 and wedge mechanism 35 are threadedly connected and both are mounted on lower mounting plate 31. Wedge mechanism 35 includes active wedge 351, working wedge 352, weight gripper 353, guide post 354 and rolling bearing 355. Active wedge 351 and two working wedges 352 cooperate. Weight gripper 353 and guide post 354 are both mounted on working wedge 352. Rolling bearing 355 is mounted on guide post 354.

[0030] In this solution, both the cylinder 33 and the motor 22 are equipped with wireless control modules that can connect to 5G or Bluetooth signals to control the cylinder's advance and disengagement, and the motor's forward and reverse rotation using a remote control.

[0031] In this design, the workbench 11 and cantilever beam 21 are both made of extruded aluminum profiles and are partially designed to be welded by argon arc welding. The aluminum alloy material can be 5052, which balances low weight and high strength.

[0032] As a preferred embodiment, four support seats 12 are provided, each connected to a threaded hole at one of the four corners of the worktable 11. The upper threaded portion and the lower rubber pad portion of each support seat 12 are bonded together with an adhesive. The horizontal state of the worktable 11 can be adjusted by rotating the four support seats 12 along their threads.

[0033] As a preferred option, the workbench 11 is made of extruded aluminum profile, and the column 14 is bolted to the workbench 11 and the lifting rack 13; a rectangular guide rail is designed on the outer side of the column 14.

[0034] As a preferred option, the cantilever beam 21 is designed with a "U"-shaped limiting hole, through which the cantilever beam 21 can be fitted onto the column 14. The "U"-shaped limiting hole of the cantilever beam is designed with a lifting limiting guide groove, which can cooperate with the rectangular guide rail on the outer side of the column 14.

[0035] Furthermore, one end of the transmission mechanism 23 is connected to the motor 22 via a coupling 231, and the other end is connected to the lifting rack 13 via a lifting gear 231.

[0036] In addition, the bolts on the aforementioned components or mechanisms can be replaced with other installation methods, such as screws, studs, or clips.

[0037] As a preferred embodiment, the lifting gear 234 in the transmission mechanism 23 is circumferentially fixed by a flat key 233 and axially fixed by a shoulder designed on the transmission shaft 232 and a round nut 235. The design of the lifting gear 234 is based on the reverse design of the load generated by a 20kg weight, and the parameters of the flat key 233 and the transmission shaft 232 are designed according to the parameters of the lifting gear based on the mechanical design manual.

[0038] As a preferred option, the working wedge 351 is designed with a "T"-shaped guide rail groove, which can be matched with the "T"-shaped guide rails designed on the two working wedges 352.

[0039] As a preferred embodiment, the lower mounting plate 31 is designed with a guide groove, which can cooperate with the rolling bearing 355 mounted on the guide post 354. The guide post 354 is designed with a hexagonal structure and a threaded design, which can be threaded to the working wedge 352. The rolling bearing 355 can be installed on the guide post 354 by heat fitting.

[0040] As a preferred option, the limiting block 34 is made of rubber and is installed with an interference fit to the guide groove designed on the lower mounting plate 31.

[0041] As a preferred option, the gripper shape at the front end of the weight gripper 353 is designed based on the gripping mechanism at the top of a cylindrical weight, and various weight grippers can be designed to match different weight masses. For example... Figure 6 The gripper form of the weight gripper 353 shown is only one embodiment. For example, the corresponding lock-type weight can be replaced with the corresponding hook-shaped structure.

[0042] Specifically, when calibrating the electronic scale, firstly, adjust the support base 12 to ensure the workbench 11 is level and stable, and place the electronic scale to be tested on the upper surface of the workbench 11. Control the cylinder 33 to retract, causing the active wedge 351 to drive the working wedge 352 to the designated position through the "T" groove. Then, manually place the large mass weight to be used in the middle position of the weight gripper 353, and control the cylinder 33 to advance, causing the active wedge 351 to drive the working wedge 352 to retract through the "T" groove until the weight gripper 353 grips the weight, and the cylinder 33 locks. Further control the motor 22 to start working. The forward rotation of the motor 22 drives the lifting gear 234 in the transmission mechanism 23 to rotate. Through the meshing transmission between the lifting gear 234 and the lifting rack 13, the cantilever beam 21 drives the weight in the lifting module 2 and the gripping module 3 to descend onto the electronic scale pan for one reading of the indication error. If the repeatability of the electronic scale needs to be calibrated, the above steps can be repeated multiple times.

[0043] In addition, the aforementioned limiting methods, such as the meshing of the lifting gear 231 and the lifting rack 13, and the cooperation between the rectangular guide rail and the rectangular guide rail groove, are all lubricated by grease.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A weight lifting device for calibrating electronic scales, characterized in that, It includes a workbench module (1), a lifting module (2) and a grasping module (3). The workbench module (1) includes a workbench (11), a support base (12), a lifting rack (13) and a column (14). The support base (12) and the column (14) are installed on the workbench (11). The lifting rack (13) is installed on the column (14) and cooperates with the lifting module (2). The lifting module (2) includes a cantilever beam (21), a motor (22) and a transmission mechanism (23). The motor (22) and the grasping module (3) are installed on the cantilever beam (21). The transmission mechanism (23) includes a coupling (231), a transmission shaft (232), a flat key (233), a lifting gear (234) and a round nut (235). The lifting gear (234) can mesh with the lifting rack (13). The grasping module (3) includes a lower mounting plate (31), an upper mounting plate (32), a cylinder (33), a limit block (34) and a wedge mechanism (35). The upper mounting plate (32) is bolted to the cantilever beam (21). The cylinder (33) and the wedge mechanism (35) are threadedly connected and both installed on the lower mounting plate (31). The wedge mechanism (35) includes a driving wedge (351), a working wedge (352), a weight gripper (353), a guide post (354) and a rolling bearing (355). The driving wedge (351) cooperates with two working wedges (352). The weight gripper (353) and the guide post (354) are both installed on the working wedge (352). The rolling bearing (355) is installed on the guide post (354).

2. The weight lifting device for electronic scale calibration according to claim 1, characterized in that: The number of the support bases (12) is four, which are respectively connected to the threaded holes at the four corners of the workbench (11). The upper part of the support base (12) is a threaded part, and the lower part is a rubber pad part.

3. The weight lifting device for electronic scale calibration according to claim 1, characterized in that: The workbench (11) is an extruded aluminum profile. The installation of the column (14) to the workbench (11) and the lifting rack (13) is by bolt connection. A rectangular guide rail is designed on one outer side of the column (14).

4. A weight lifting device for calibrating electronic scales according to claim 1, characterized in that: A "mouth”-shaped limit hole is designed on the cantilever beam (21). Through the "mouth”-shaped limit hole, the cantilever beam (21) can be sleeved on the column (14). A lifting limit guide rail groove is designed in the "mouth”-shaped limit hole of the cantilever beam, which can cooperate with the rectangular guide rail on one outer side of the column (14).

5. A weight lifting device for calibrating electronic scales according to claim 1, characterized in that: One end of the transmission mechanism (23) is connected to the motor (22) through the coupling (231), and the other end is connected through the meshing of the lifting gear (234) with the lifting rack (13).

6. A weight lifting device for calibrating electronic scales according to claim 1, characterized in that: The lifting gear (234) in the transmission mechanism (23) is circumferentially fixed by the flat key (233), and axially fixed by the shaft shoulder designed on the transmission shaft (232) and the round nut (235).

7. A weight lifting device for electronic scale calibration according to claim 1, characterized in that: A "T”-shaped guide rail groove is designed on the driving wedge (351), which can cooperate with the "T”-shaped guide rails designed on two working wedges (352).

8. A weight lifting device for calibrating electronic scales according to claim 1, characterized in that: The lower mounting plate (31) is designed with a guide groove, which can cooperate with the rolling bearing (355) installed on the guide post (354).

9. A weight lifting device for calibrating electronic scales according to claim 1, characterized in that: The limiting block (34) is made of rubber and is installed with an interference fit to the guide groove designed on the lower mounting plate (31).

10. A weight lifting device for calibrating electronic scales according to claim 1, characterized in that: The shape of the gripper at the front end of the weight gripper (353) is designed based on the gripping mechanism at the top of the cylindrical weight, and various weight grippers can be designed to match different weights of different masses.

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