CN221174173U - Automatic loading weight testing device for precision test - Google Patents

Abstract

The utility model belongs to the technical field of production and test of precision instruments and weighing machines, and particularly relates to an automatic loading weight testing device for a precision test. The weight is applied to a test product by the driving mechanism, the weight bracket continuously moves downwards, and the hanging hook of the weight bracket and the hanging hook of the weight are automatically separated at the moment because the weight is in a static state, and the hanging hook cannot have any influence on the weight, so that the weight bracket cannot cause errors on the measurement result of the product, and the measurement precision is improved.

Description

Automatic loading weight testing device for precision test

Technical Field

The utility model belongs to the technical field of production test of precise instruments and weighing machines, and particularly relates to an automatic loading weight testing device for a precise test.

Background

In the production test process of many precise instruments and weighing apparatus, the performance of the product needs to be tested and regulated by loading and unloading weights, so that the product is ensured to accord with technical indexes. At present, the existing loading and unloading actions basically adopt manual operation. However, for precision instruments, vibration and shaking exist in the process of manually loading and unloading weights, and if the weight placement position deviates from the center position too much, measurement errors are caused; meanwhile, only one weight can be loaded and unloaded at a time by manual loading, if a plurality of weights are loaded, the operation time is long, and the production test efficiency is low; in addition, for high-capacity weights, such as weights above 10KG, the weights easily fall down in the manual operation process of personnel, so that the product is damaged and the personnel are injured.

Prior art CN112229497a discloses a balance unbalanced load, fatigue, sensing automatic testing arrangement, including frame, year weighing platform, conveyor, loading device, weight subassembly and control system, wherein: the weighing platform is used for bearing a balance body to be inspected; the conveying device is used for driving the weighing platform to move in the plane; the loading device is used for driving the weight assembly to move so as to press the weight assembly to the balance body to be checked, and specifically comprises a servo electric cylinder and a hanging plate, wherein the hanging plate is in an inverted U shape, sliding grooves are respectively formed in two sides of the hanging plate, and the servo electric cylinder is connected with the hanging plate and used for driving the hanging plate to do linear motion; the weight assembly is connected with the hanging plate and used for applying pressure to the balance body to be checked; the control system is used for controlling the conveying device and the loading device, integrates three functions of unbalanced load test, fatigue test and sensing test, remarkably improves the integration degree and the automation degree of equipment, reduces personnel participation and improves the detection efficiency of the scale. However, after the weight is automatically loaded, the weight is still hung in the hanging plate in the prior art, so that errors of measurement results can be caused.

Disclosure of utility model

In order to solve the technical problems that after automatic loading is completed, weights are not separated from a hanging plate and cannot be automatically unloaded, so that measurement errors are caused and measurement accuracy is affected, the utility model provides the following technical scheme:

The utility model provides an automatic loading weight testing arrangement for precision test, includes base, weight support, drive mechanism, actuating mechanism, the weight support is located the base top and sets up relatively, and the test product is fixed in on the base, the weight support passes through drive mechanism and links to each other with actuating mechanism, actuating mechanism is fixed in on the temperature change test box, set up the rubus on the internal surface of weight support, set up the couple on the weight top surface, the weight hang in through the couple on the rubus of weight support, and the weight is located the test product top.

Further, the weight bracket is in a grid structure.

Further, the driving mechanism is a linear direct-drive motor.

Further, the transmission mechanism comprises a plurality of linkage screw rods and a transmission plate, the transmission plate is fixed above the driving mechanism, one end of the linkage screw rods is connected with the weight bracket, and the other end of the linkage screw rods is connected with the transmission plate.

Further, the automatic loading weight testing device for the precision test further comprises a fixing plate, the fixing plate is fixed on the top surface of the temperature change test box, the driving mechanism is fixed on the fixing plate, and the linkage screw rod penetrates through the fixing plate.

Further, the hooks and the suspension hooks are of C-shaped flat structures.

Further, the automatic loading weight testing device for the precision test further comprises a loading mechanism supporting frame, the loading mechanism supporting frame comprises two equal-height H-shaped stand columns 21, two cross beams are erected at the top ends of the two stand columns 21, the stand columns are fixed on the ground and located outside the temperature change test box, the two cross beams penetrate through the temperature change test box, the cross beams are not in contact with the temperature change test box, and the base is fixed on the cross beams.

Further, the number of the bases is multiple, the bases are arranged oppositely and horizontally in sequence from bottom to top, and the bases are connected through a base screw rod.

Further, weight brackets are arranged above each base oppositely and horizontally, the weight brackets are connected through a linkage screw rod, a through hole is formed in each base, the diameter of each through hole is larger than that of the linkage screw rod, and the linkage screw rod passes through the rest bases except the bottommost base through the through hole but does not contact with the through hole.

Further, the linkage screw rods are divided into two groups, a fixed plate is arranged in each group of linkage screw rods, and a driving mechanism is arranged on each fixed plate.

Compared with the prior art, the utility model has the following beneficial effects:

(1) According to the weight bracket, the hanging hooks are arranged on the inner surface of the weight bracket, the hanging hooks are arranged on the top surface of the weight, the weight is hung on the hanging hooks of the weight bracket through the hanging hooks, the weight is positioned above a test product, when the weight is applied to the test product by the driving mechanism, the weight bracket continuously moves downwards, and because the weight is in a static state, the hanging hooks of the weight bracket and the hanging hooks of the weight are automatically separated, the hanging hooks cannot have any influence on the weight, so that the weight bracket cannot cause errors on a measurement result of the product, and the measurement precision is improved.

(2) According to the utility model, the loading mechanism support frame is not contacted with the temperature change test box, and vibration possibly occurs in the operation process of the temperature change test box, so that the loading mechanism support frame is not contacted with the temperature change test box, the influence of vibration generated by the temperature change test box on the test result of a measured product is isolated, and the test precision is improved.

Drawings

FIG. 1 is an overall schematic diagram of the present utility model, omitting a loading mechanism support;

FIG. 2 is an enlarged schematic view of the weight installation details of the present utility model;

FIG. 3 is an overall schematic of the present utility model;

FIG. 4 is a schematic overall view of an embodiment of the present utility model;

reference numerals: 1-temperature change test box, 2-loading mechanism support frame, 21-upright post, 22-cross beam, 3-fixed plate, 4-driving mechanism, 5-driving mechanism, 51-driving plate, 52-linkage screw rod, 6-upper weight bracket, 7-lower weight bracket, 8-base screw rod, 9-upper base, 10-lower base, 11-weight, 12-test product, 13-hanging hook, 14-hanging hook and 15-porous plate.

Detailed Description

The technical solutions of the present utility model will be clearly described below with reference to the accompanying drawings, and it is obvious that the described embodiments are not all embodiments of the present utility model, and all other embodiments obtained by a person skilled in the art without making any inventive effort are within the scope of protection of the present utility model.

It should be noted that, the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "lateral", "longitudinal", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1, the utility model provides an automatic loading weight testing device for precision test, which comprises a base, a weight bracket, a transmission mechanism 5 and a driving mechanism 4, wherein in the embodiment, the base for supporting a plurality of test products 12 comprises an upper base 9 and a lower base 10, a porous plate 15 is arranged on each base, and the positioning pins penetrate through the porous plate 15 to fix the plurality of test products 12 on the upper base 9 and the lower base 10. The upper base 9 is used for loading small weights, the lower base 10 is used for loading large weights, the upper base 9 and the lower base 10 are horizontally arranged, the upper base 9 and the lower base 10 are connected through the base screw rod 8, and the base screw rod 8 is perpendicular to the upper base 9 and the lower base 10. The distance between the upper base 9 and the lower base 10 is adjusted through the base screw rod 8 so as to adapt to test products 12 with different sizes, and after the distance between the upper base 9 and the lower base 10 is adjusted, the adjusted upper base 9 and lower base 10 must be checked and adjusted to be horizontal, so that the horizontal level of all bases is ensured. After the test products 12 are positioned and mounted on the base, the level of each test product 12 is not adjusted individually, and small level errors that may exist due to assembly during testing of the test products 12 are negligible.

The upper layer weight bracket 6 is horizontally and oppositely arranged above the upper layer base 9, the lower layer weight bracket 7 is horizontally and oppositely arranged above the lower layer base 10, the hooks 13 are arranged on the lower surfaces of the upper layer weight bracket 6 and the lower layer weight bracket 7, the hooks 14 are arranged on the top surfaces of the weights 11, as shown in fig. 2, the hooks 14 and the hooks 13 are of C-shaped flat structures, the hooks 14 are easier to hook by the hooks 13 of the C-shaped flat structures, and the hooks 14 are easier to automatically separate from the hooks 14 due to large openings of the hooks 13. A plurality of weights 11 are suspended on hooks 13 of the upper and lower weight holders 6, 7, respectively, by respective hooks 14, and each weight 11 is located above each test product 12. The upper weight bracket 6 and the lower weight bracket 7 are connected with the driving mechanism 4 through the transmission mechanism 5, the driving mechanism 4 is a linear direct-drive motor, and the driving mechanism 4 can drive the upper weight bracket 6 and the lower weight bracket 7 to linearly lift. The upper layer weight bracket 6 and the lower layer weight bracket 7 are in a grid structure so as to lighten the weight of the upper layer weight bracket 6 and the lower layer weight bracket 7 and reduce the power consumption of the driving mechanism 4.

The transmission mechanism 5 is provided with a plurality of linkage screw rods 52 and a transmission plate 51, the linkage screw rods 52 are divided into two groups, each group of two linkage screw rods 52, each group of linkage screw rods 52 is arranged in the upper weight bracket 6 and the lower weight bracket 7 in a penetrating way, and the distance between the upper weight bracket 6 and the lower weight bracket 7 is adjusted through the linkage screw rods 52 so as to adapt to the sizes of different test products 12. For the base standardization, convenient to use all sets up the via hole on every base, and the diameter of via hole is greater than the diameter of linkage lead screw 52, linkage lead screw 52 passes the via hole of upper base 9, but does not pass lower floor's base 10, and linkage lead screw 52 does not contact the via hole of upper base 9 to guarantee in the operation, linkage lead screw 52 can not lead to the error of test result because touching upper base 9.

The top end of each group of linkage screw rods 52 is respectively fixed in a transmission plate 51, the lower part of each transmission plate 51 is connected with one driving mechanism 4, a fixed plate 3 is arranged below each driving mechanism 4, the linkage screw rods 52 are arranged in the fixed plate 3 in a penetrating way, the fixed plate 3 and the transmission plates 51 are horizontally arranged, and the fixed plate 3 is used for fixing the driving mechanisms 4, the upper weight bracket 6 and the lower weight bracket 7.

As shown in fig. 3, the lower-layer base 10 is fixed to the ground through a loading mechanism support frame 2, the loading mechanism support frame 2 includes two equal-height H-shaped columns 21, two cross beams 22 are erected at the top ends of the two columns 21, and the lower-layer base 10 is fixed to the cross beams 22, so that the automatic loading weight testing device for precision test is fixed.

As shown in fig. 4, the automatic loading weight testing device for precision test is used for being placed in a temperature change test box 1 and used for testing and adjusting the performance of products in the production process of precision instruments and weighing machines. The temperature change test box 1 has the function of automatically adjusting the internal temperature and humidity of the temperature change test box 1 to preset temperature and humidity values through a control program, and ensuring constant temperature and humidity in a certain time so as to meet the test environment requirements of precise instruments and weighing machines. The fixing plate 3 is fixed on the top of the temperature change test box 1, the upright posts 21 are fixed on the ground and are positioned outside the temperature change test box 1, and the two cross beams 22 penetrate through the temperature change test box 1, but the cross beams 22 are not contacted with the temperature change test box 1. Therefore, the loading mechanism support frame 2 is not rigidly connected and contacted with the temperature change test box 1, and the purpose of the loading mechanism support frame is to isolate vibration possibly generated in the operation process of the temperature change test box 1, so that the influence of vibration on the test is avoided, and the test precision is improved.

The number of the bases of the automatic loading weight testing device for precision test can be adjusted to one or more according to the number of products 12 to be tested, the number of weight brackets is correspondingly adjusted, and the number of the driving mechanisms 4 is adjusted according to the capacity of the weights 11. The multiple bases are matched with the multiple weight brackets to execute multiple testing stations and multiple measuring ranges to simultaneously perform testing work.

The power line of the linear direct-drive motor is connected to the electric control unit of the temperature change test box 1, and the control of the linear direct-drive motor and the control of the temperature change test box 1 are controlled by compiled software programs. The system software program controls the whole loading test process according to the set judging conditions, and the whole test process is not affected by the test abnormality of the individual test products 12 and the test stations in the test process.

The specific installation and test process of the automatic loading weight test device for the precision test is as follows:

before testing, the test products 12 are fixed on the test stations of the upper-layer base 9 and the lower-layer base 10 respectively through positioning pins;

Then according to the capacity of the test product 12, weights 11 with corresponding numbers are respectively arranged on the upper weight bracket 6 and the lower weight bracket 7, and when the test stations of the upper base 9 and the lower base 10 do not need the test product 12, the weights 11 do not need to be arranged corresponding to the test stations, so that unnecessary energy waste is avoided, and the weights 11 are hung on the hooks 13 of the C-shaped flat structures of the upper weight bracket 6 and the lower weight bracket 7;

after the weight 11 is installed, a gap of 2-3 cm is reserved between the weight 11 and the test product 12, so that the weight 11 is ensured not to be in direct contact with the test product 12 before the test;

After the installation before the test is finished, clicking the set program to start the test:

When the temperature and humidity in the temperature change test box 1 reach a set value, system software sets the speed of the linear direct-drive motor to be 5mm/s according to a set judgment condition (for example, when the temperature 15+/-0.1 ℃ and the humidity 50+/-1% are met and 75% of test products 12 are stable) through an electric control unit, the speed is relatively slow, the linear direct-drive motor slowly descends to drive a transmission plate 51 to slowly descend, the transmission plate 51 drives a communicating screw rod 52 to slowly descend, and then the upper weight bracket 6 and the lower weight bracket 7 are driven to slowly descend, and weights 11 hung in the slow descending process are slowly and automatically loaded on the test products 12;

When the weight 11 cannot continuously descend, after the upper weight bracket 6 and the lower weight bracket 7 continuously descend for a certain distance in a static state, the hooks 13 of the upper weight bracket 6 and the lower weight bracket 7 are separated from the weights 11 from the hooks 14 of the weights 11 in the continuous descending process, so that the hooks 13 are not contacted with the weights 11, and the influence on the test result is avoided;

After the test is finished, the speed of the linear direct-drive motor is still set to be 5mm/s through an electric control unit, the linear direct-drive motor slowly rises to drive a transmission plate 51 to slowly rise, the transmission plate 51 drives a communication screw rod 52 to slowly rise, and then hooks 14 of weights 11 at corresponding positions on hooks 13 of an upper weight bracket 6 and a lower weight bracket 7 are driven to further drive the weights 11 to be unloaded from a test product 12;

After repeating the loading, reading and unloading of the test steps for 3 times, the temperature change test box 1 is adjusted to the next temperature and humidity value according to the set value of the software, and the loading, reading and unloading operations are performed again. In the whole loading and unloading process, the running speed of the motor is set to be 5mm/s;

after all the tests are completed, the temperature change test box 1 automatically returns to the room temperature environment, and the product is taken out.

The automatic loading weight testing device for the precision test realizes automatic and accurate control of loading and unloading weights 11, the original manual loading and unloading weights 11 are not needed to be judged by experience of operators, and the performance of products is tested and regulated by the automatic loading and unloading weights 11, so that the experimental efficiency is improved and the measurement error is reduced;

During manual operation, if the weight 11 is loaded onto the test product 12 too fast, errors in the test results may be caused. The running speed of the motor is controllable and is set to be 5mm/s, the speed is very slow compared with manual loading, the weight 11 does not shake severely in the whole automatic loading and unloading process, the weight 11 is slowly loaded on the test product 12, and the test error is further avoided;

During manual operation, if the weight 11 is placed too far from the center of the test product 12, measurement errors may be caused. In the whole automatic loading and unloading process of the embodiment, the weight 11 is fixed in the mounting position, so that the weight is basically free from deviation, and further the test error is avoided.

The technical characteristics form the optimal embodiment of the utility model, have stronger adaptability and optimal implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the needs of different situations.

Finally, it should be noted that the above description is only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and that the simple modification and equivalent substitution of the technical solution of the present utility model can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present utility model.

Claims (10)

1. The utility model provides an automatic loading weight testing arrangement for precision test, includes base, weight support, drive mechanism, actuating mechanism, the weight support is located the base top and sets up relatively, and the test product is fixed in on the base, the weight support passes through drive mechanism and links to each other with actuating mechanism, actuating mechanism is fixed in on the temperature change test box, its characterized in that: the weight rack is characterized in that a hanging hook is arranged on the inner surface of the weight rack, a hook is arranged on the top surface of the weight, the weight is hung on the hanging hook of the weight rack through the hook, and the weight is positioned above a test product.

2. The automatic loading weight testing device for precision test according to claim 1, wherein: the weight bracket is in a grid structure.

3. The automatic loading weight testing device for precision test according to claim 1, wherein: the driving mechanism is a linear direct-drive motor.

4. An automatic loading weight testing device for precision experiments according to any one of claims 1 to 3, wherein: the transmission mechanism comprises a plurality of linkage screw rods and a transmission plate, wherein the transmission plate is fixed above the driving mechanism, one end of the linkage screw rods is connected with the weight bracket, and the other end of the linkage screw rods is connected with the transmission plate.

5. The automatic loading weight testing device for precision test according to claim 4, wherein: the automatic loading weight testing device for the precision test further comprises a fixing plate, wherein the fixing plate is fixed on the top surface of the temperature change test box, the driving mechanism is fixed on the fixing plate, and the linkage screw rod penetrates through the fixing plate.

6. The automatic loading weight testing device for precision test according to claim 5, wherein: the hooks and the suspension hooks are of C-shaped flat structures.

7. The automatic loading weight testing device for precision test according to claim 6, wherein: the base is fixed in subaerial through loading mechanism support frame, loading mechanism support frame includes two stand of contour H type, and two crossbeams are erect on two stand tops, the base is fixed in on the crossbeam, the stand is fixed in subaerial and is located temperature change test box outside, and two crossbeams wear to locate in the temperature change test box, and the crossbeam is not contacted with the temperature change test box.

8. The automatic loading weight testing device for precision test according to claim 7, wherein: the base quantity is a plurality of, and a plurality of bases are from supreme relative and the level setting in proper order down, link to each other through the base lead screw between the base.

9. The automatic loading weight testing device for precision experiments of claim 8, wherein: the upper part of each base is opposite and horizontally provided with a weight bracket, the weight brackets are connected through a linkage screw rod, the base is provided with a via hole, the diameter of the via hole is larger than that of the linkage screw rod, and the linkage screw rod passes through the rest bases except the bottommost base through the via hole but does not contact the via hole.

10. The automatic loading weight testing device for precision test according to claim 9, wherein: the linkage screw rods are divided into two groups, a fixed plate is arranged in each group of linkage screw rods, and a driving mechanism is arranged on each fixed plate.