Slow descent device for weight metrological verification

Abstract

The utility model relates to the technical field of slow descent devices, and discloses a slow descent device for weight metrological verification, which comprises a base. According to the slow descending device for weight metrological verification, through the arrangement of the driving mechanism, the lead screw, the buffer mechanism and the extension rod, when a weight slowly descends, a servo motor on one side is started, the servo motor drives a main gear on one side and an auxiliary gear meshed with the surface of the main gear to rotate, and then the lead screw on the surface of the auxiliary gear rotates; a threaded sleeve on the lead screw moves up and down along the lead screw under the limiting of a limiting block, a weight on one side of the threaded sleeve can be lifted, after the weight is lifted to a specific position, an extension rod slides on the surface of a damping rod, the surface of the damping rod is sleeved with a buffer spring, and the buffer spring is extruded by the extension rod to deform, so that the weight is lifted. And reverse acting force is provided for buffering the weight, so that the weight can stably fall down, and the damage to the bottom mass comparator caused by overlarge impact force is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of slow-down devices, in particular to a slow-down device used in weight measurement and verification. Background Art

[0002] Weight calibration is to evaluate the performance of weights, such as accuracy, stability, sensitivity, etc., to determine whether it meets the statutory requirements. Any weight is only valuable if it is accurate and consistent. If inaccurate measuring instruments (or testing instruments) are used during inspection, the inspection results will not be guaranteed and the correctness of the inspection conclusions will be out of the question. After using any kind of measuring weight for a certain period of time, due to operational wear and aging, as well as changes in objective conditions such as the use environment, temperature, and humidity, the measuring weight may become inaccurate or malfunction, and the accuracy and reliability of the measurement value cannot be guaranteed for a long time. Therefore, the state has stipulated strict use cycles and mandatory calibration for different measuring instruments, and corrected the errors that occur when using measuring instruments through periodic calibration, thereby ensuring the accuracy of the measurement value.

[0003] However, in the existing weight calibration technology, the loading and unloading of weights with a mass of 50KG and above is usually carried out manually. Due to the large mass of the weight, it is not easy for the staff to control it when putting it down. When the weight contacts the mass comparator, a violent impact is likely to occur. The impact force will cause damage to the sensor part in the mass comparator, and in severe cases, the mass comparator will be scrapped. Therefore, a slow-down device for weight measurement and calibration is proposed.

[0004] A slow-down device for weight measurement and verification disclosed in the announcement number CN213569247U belongs to the field of measurement and verification technology. A slow-down device for weight measurement and verification includes a support column, a base is fixedly connected to the lower end of the support column, a motor is fixedly arranged on the front side of the top of the base, two racks are arranged in the upper part of the base through groove, a gear B is meshed and connected between the two racks, a connecting rod is arranged in the lower part of the through groove, and a rotating rod is hinged at the left and right ends of the front part and the left and right ends of the rear part of the connecting rod, and a roller is rotatably connected to the bottom surface of the outer end of the rotating rod. The utility model drives the chain to rotate through the motor, and the abutment block at the lower part of the chain is cancelled from abutting against the rack on the front side. When the rack is not abutted by the abutment block, the deadweight of the device rotates the roller with the middle part of the rotating rod as the center of the circle, so that the roller is folded into the groove, so that the bottom surface of the base contacts the ground, so that the device remains stable when continuing to slowly descend, ensuring that the large mass weight maintains a stable operation when slowly descending.

[0005] Although the above patent achieves the goal of driving the chain to rotate through the motor, the contact between the block at the bottom of the chain and the rack on the front side is cancelled, and when the rack is not contacted by the block, the device's own weight rotates the roller with the middle of the rotating rod as the center, so that the roller is folded into the groove, and the bottom surface of the base is in contact with the ground, so that the device remains stable when it continues to slowly descend, ensuring that the large mass weight maintains smooth operation during the slow descent; however, the device lacks a method of fixing the weight after the slow descent to ensure that the weight can stay stably in the correct position after descending, and will not continue to move or shake, so as to avoid measurement errors caused by the movement or shaking of the weight.

[0006] Therefore, it is necessary to invent a slow-down device for weight measurement verification to solve the above problems. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] The technical problem solved by the utility model is to provide a slow-descent device for weight measurement and calibration which is highly practical, can be simply operated, and has a relatively simple structure, thereby solving the problem in the above-mentioned background technology of lack of fixing of the weight after slow-descent.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the utility model is implemented through the following technical solutions: a slow-descent device for weight measurement and calibration, comprising a base, the top of the base is threadedly connected to a support column, the top of the support column is fixedly connected to a motor box, the inside of the motor box is fixedly connected to a driving mechanism, one end of the driving mechanism is fixedly connected to a main gear, the surface of the main gear is meshed with an auxiliary gear, the surface of the auxiliary gear is fixedly connected to a screw rod, the surface of the screw rod is bolted to a threaded sleeve, one end of the threaded sleeve is fixedly connected to a support rod, both sides of the surface of the support rod are fixedly connected to extension rods, one side of the extension rod is slidably connected to a buffer mechanism, the end of the support rod is fixedly connected to a hook, the surface of the hook is sleeved with a weight, the middle part of the top surface of the base is fixedly connected to a mass comparator, the middle part of the mass comparator is provided with a positioning groove, and the top surface of the mass comparator is fixedly connected to a clamping mechanism.

[0011] As a further solution of the utility model, the driving mechanism includes a servo motor fixedly connected to the inside of the motor box, the output end of the servo motor is splined with a transmission rod, and the transmission rod is fixedly connected to one side of the main gear, so that the servo motor can drive the screw to rotate.

[0012] As a further solution of the utility model, the buffer mechanism includes a damping rod slidably connected to one side of the extension rod, and a buffer spring is sleeved on the surface of the damping rod to facilitate buffering.

[0013] As a further solution of the utility model, the clamping mechanism includes two groups of support plates fixedly connected to the top surface of the mass comparator, and two groups of hydraulic rods are fixedly connected to the surface of the support plates, one group of hydraulic rods is fixedly connected to the surface of a left clamping ring, and the other group of hydraulic rods is fixedly connected to one side of a right clamping ring, and the left clamping ring and the right clamping ring are convenient for fixing weights.

[0014] As a further solution of the utility model, the bottom of the damping rod is fixedly connected to a connecting frame, and the connecting frame is fixedly connected to the top of the base, so that the connecting frame is convenient for supporting the damping rod.

[0015] As a further solution of the utility model, both sides of the surface of the threaded sleeve are fixedly connected with limiting blocks, and the limiting blocks are slidably connected to the inside of the sliding groove opened on the surface of the support column, so that the limiting blocks can easily limit the threaded sleeve.

[0016] As a further solution of the utility model, four groups of threaded holes are opened on the surface of the base, and the internal threads of the threaded holes are connected with threaded columns, which are convenient for improving the stability of the equipment.

[0017] (III) Beneficial effects

[0018] The utility model provides a slow-down device for weight measurement and verification, which has the following beneficial effects:

[0019] 1. The slow-descent device used in weight measurement and verification is provided with a driving mechanism, a screw rod, a buffer mechanism, and an extension rod. When the weight is slowly lowered, the servo motor on one side is started, and the servo motor drives the main gear on one side and the auxiliary gear meshing with the main gear surface to rotate, thereby rotating the screw rod on the surface of the auxiliary gear. The threaded sleeve on the screw rod moves up and down along the screw rod under the limit of the limit block, so that the weight on one side of the threaded sleeve can be raised and lowered. After being raised and lowered to a specific position, the extension rod slides on the surface of the damping rod, and a buffer spring is sleeved on the surface of the damping rod. The buffer spring is squeezed by the extension rod to produce deformation, and provides a reverse force to buffer the weight, so that the weight can fall smoothly, avoiding damage to the bottom mass comparator caused by excessive impact force.

[0020] 2. The slow-descent device used in weight measurement and verification, through the setting of the clamping mechanism, after the weight is slowly descended, it falls into the positioning groove, and then the hydraulic rod on one side of the support plate is started. The hydraulic rod retracts and drives the left clamp ring and the right clamp ring on one side to clamp and fix the descending weight, so as to ensure that the weight can stay stably in the correct position after descending, and will not continue to move or shake, avoiding measurement errors caused by the movement or shaking of the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the driving mechanism of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the buffer mechanism of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the clamping mechanism of the utility model.

[0025] In the figure: 1. base; 2. support column; 3. motor box; 4. driving mechanism; 401. servo motor; 402. transmission rod; 5. main gear; 6. auxiliary gear; 7. lead screw; 8. threaded sleeve; 9. support rod; 10. extension rod; 11. buffer mechanism; 1101. damping rod; 1102. buffer spring; 12. hook; 13. weight; 14. mass comparator; 15. clamping mechanism; 1501. support plate; 1502. hydraulic rod; 1503. left clamp ring; 1504. right clamp ring; 16. connecting frame; 17. limit block; 18. threaded column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 4 The utility model provides a technical solution: a slow-descent device for weight measurement verification, comprising a base 1, a support column 2 is threadedly connected to the top of the base 1, a motor box 3 is fixedly connected to the top of the support column 2, a driving mechanism 4 is fixedly connected to the inside of the motor box 3, and the driving mechanism 4, a screw rod 7, a buffer mechanism 11, and an extension rod 10 are arranged to prevent the impact force from being too large to cause damage to the bottom mass comparator 14, one end of the driving mechanism 4 is fixedly connected to a main gear 5, the surface of the main gear 5 is meshed with an auxiliary gear 6, the surface of the auxiliary gear 6 is fixedly connected to a screw rod 7, and the surface of the screw rod 7 is threaded. A bolt is connected with a threaded sleeve 8, one end of the threaded sleeve 8 is fixedly connected with a support rod 9, both sides of the surface of the support rod 9 are fixedly connected with extension rods 10, one side of the extension rod 10 is slidably connected with a buffer mechanism 11, the end of the support rod 9 is fixedly connected with a hook 12, and a weight 13 is sleeved on the surface of the hook 12. A mass comparator 14 is fixedly connected to the middle of the top surface of the base 1, a positioning groove is provided in the middle of the mass comparator 14, and a clamping mechanism 15 is fixedly connected to the top surface of the mass comparator 14. The setting of the clamping mechanism 15 can avoid measurement errors caused by the movement or shaking of the weight 13;

[0028] See also Figure 2 The driving mechanism 4 includes a servo motor 401 fixedly connected to the inside of the motor box 3, and the output end of the servo motor 401 is spline-connected with a transmission rod 402, and the transmission rod 402 is fixedly connected to one side of the main gear 5. The servo motor 401 is convenient for driving the screw rod 7 to rotate;

[0029] See also Figure 3 The buffer mechanism 11 includes a damping rod 1101 slidably connected to one side of the extension rod 10, and a buffer spring 1102 is sleeved on the surface of the damping rod 1101, and the buffer spring 1102 is convenient for buffering;

[0030] See also Figure 4 The clamping mechanism 15 includes two groups of support plates 1501 fixedly connected to the top surface of the mass comparator 14, and two groups of hydraulic rods 1502 are fixedly connected to the surface of the support plates 1501. A left clamping ring 1503 is fixedly connected to the surface of one group of hydraulic rods 1502, and a right clamping ring 1504 is fixedly connected to one side of the other group of hydraulic rods 1502. The left clamping ring 1503 and the right clamping ring 1504 are convenient for fixing the weight 13;

[0031] See also Figure 3 The bottom of the damping rod 1101 is fixedly connected with a connecting frame 16, and the connecting frame 16 is fixedly connected to the top of the base 1, and the connecting frame 16 is convenient for supporting the damping rod 1101;

[0032] See also Figure 2 , both sides of the surface of the threaded sleeve 8 are fixedly connected to the limiting blocks 17, and the limiting blocks 17 are slidably connected to the inside of the sliding groove opened on the surface of the support column 2, so that the limiting blocks 17 are convenient for limiting the threaded sleeve 8;

[0033] See also Figure 1 Four groups of threaded holes are provided on the surface of the base 1, and the internal threads of the threaded holes are connected with threaded columns 18, which are convenient for improving the stability of the equipment.

[0034] In the utility model, the working steps of the device are as follows:

[0035] The first step: when the weight 13 is slowly lowered, the servo motor 401 on one side is started, and the servo motor 401 drives the main gear 5 on one side and the auxiliary gear 6 meshed on the surface of the main gear 5 to rotate, thereby rotating the screw rod 7 on the surface of the auxiliary gear 6, and the threaded sleeve 8 on the screw rod 7 moves up and down along the screw rod 7 under the limit of the limit block 17, so that the weight 13 on one side of the threaded sleeve 8 can be raised and lowered. After being raised and lowered to a specific position, the extension rod 10 slides on the surface of the damping rod 1101, and the surface of the damping rod 1101 is sleeved with a buffer spring 1102. The buffer spring 1102 is squeezed by the extension rod 10 to produce deformation, providing a reverse force to buffer the weight 13, so that the weight 13 can fall smoothly;

[0036] The second step: After the weight 13 slowly descends and falls into the positioning groove, the hydraulic rod 1502 on one side of the support plate 1501 is started. The hydraulic rod 1502 retracts and drives the left clamp ring 1503 and the right clamp ring 1504 on one side to clamp and fix the descending weight 13 to ensure that the weight 13 can stay stably in the correct position after descending and will not continue to move or shake.

[0037] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0038] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slow-down device for weight measurement and verification, comprising a base (1), characterized in that: The top of the base (1) is threadedly connected to a support column (2), the top of the support column (2) is fixedly connected to a motor box (3), the interior of the motor box (3) is fixedly connected to a driving mechanism (4), one end of the driving mechanism (4) is fixedly connected to a main gear (5), the surface of the main gear (5) is meshed with an auxiliary gear (6), the surface of the auxiliary gear (6) is fixedly connected to a screw rod (7), the surface of the screw rod (7) is bolted to a threaded sleeve (8), one end of the threaded sleeve (8) is fixedly connected to a support column (2), and the support column (2) is fixedly connected to a motor box (3). A rod (9) is provided, both sides of the surface of the support rod (9) are fixedly connected to extension rods (10), one side of the extension rod (10) is slidably connected to a buffer mechanism (11), the end of the support rod (9) is fixedly connected to a hook (12), the surface of the hook (12) is sleeved with a weight (13), the middle part of the top surface of the base (1) is fixedly connected to a mass comparator (14), the middle part of the mass comparator (14) is provided with a positioning groove, and the top surface of the mass comparator (14) is fixedly connected to a clamping mechanism (15).

2. The slow-descent device for weight measurement and verification according to claim 1, characterized in that: The driving mechanism (4) comprises a servo motor (401) fixedly connected to the inside of the motor box (3); the output end of the servo motor (401) is spline-connected to a transmission rod (402); and the transmission rod (402) is fixedly connected to one side of the main gear (5).

3. The slow-descent device for weight measurement and verification according to claim 1, characterized in that: The buffer mechanism (11) comprises a damping rod (1101) slidably connected to one side of the extension rod (10), and a buffer spring (1102) is sleeved on the surface of the damping rod (1101).

4. The slow-descent device for weight measurement and verification according to claim 1, characterized in that: The clamping mechanism (15) comprises two groups of support plates (1501) fixedly connected to the top surface of the mass comparator (14), and two groups of hydraulic rods (1502) are fixedly connected to the surface of the support plates (1501), wherein a left clamping ring (1503) is fixedly connected to the surface of one group of hydraulic rods (1502), and a right clamping ring (1504) is fixedly connected to one side of the other group of hydraulic rods (1502).

5. The slow-descent device for weight measurement verification according to claim 3, characterized in that: The bottom of the damping rod (1101) is fixedly connected to a connecting frame (16), and the connecting frame (16) is fixedly connected to the top of the base (1).

6. The slow-descent device for weight measurement and verification according to claim 1, characterized in that: Limit blocks (17) are fixedly connected to both sides of the surface of the threaded sleeve (8), and the limit blocks (17) are slidably connected to the inside of a sliding groove provided on the surface of the support column (2).

7. The slow-descent device for weight measurement verification according to claim 1, characterized in that: Four groups of threaded holes are provided on the surface of the base (1), and threaded columns (18) are connected to the internal threads of the threaded holes.

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