A push-pull handle ergonomics testing device and method

Abstract

The application provides a push-pull handlebar ergonomics testing device and method. The device comprises a torque output device, an output shaft, a plurality of sample arms connected with the output shaft, and a push-pull handlebar sample installed on each sample arm. The torque output device comprises a housing, a servo motor, a gear reducer and a controller installed in the housing; the servo motor is connected with the output shaft through the gear reducer; and the controller is used for controlling the servo motor to rotate a determined angle or to stably output a determined torque, so as to provide a required operation resistance to a tester. The technical scheme provided by the application can complete the handlebar operation ergonomics test, and successfully solves the technical problems of lacking of experimental platform and experimental method design in the comfort ergonomics test of the push-pull handlebar and other manual control devices.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ergonomics testing, and particularly relates to a push-pull lever control ergonomics testing device and method. BACKGROUND

[0002] The man-machine adaptability parameters (size, operation stroke, control force, etc.) of push-pull lever and other manual control devices affect the operation comfort and operation performance. If the man-machine adaptability parameters of the control device are not properly set, on the one hand, the fatigue and the probability of occupational injury of the operator when completing the work task are increased, and on the other hand, the operation efficiency is reduced. However, there is no solution in the prior art for testing the operation comfort of the push-pull lever and other manual control devices. SUMMARY

[0003] Therefore, the present application provides a push-pull lever control ergonomics testing device and method to make up for the lack of push-pull lever control comfort testing solutions in the prior art.

[0004] In a first aspect, the present application provides a push-pull lever control ergonomics testing device, comprising:

[0005] a torque output device, an output shaft, and a plurality of sample arm supports connected to the output shaft;

[0006] a push-pull lever sample is installed on the sample arm support;

[0007] The torque output device comprises a housing, a servo motor, a gear reducer and a controller installed in the housing; the servo motor is connected to the output shaft through the gear reducer; the controller is used to control the servo motor to rotate a determined angle and to stably output a determined torque, thereby providing the required operation resistance.

[0008] Preferably, the end of the sample arm support is connected with a lever joint, and the push-pull lever sample is sleeved outside the lever joint.

[0009] Preferably, the inner surface of the push-pull lever sample is in contact with the outer periphery of the lever joint.

[0010] Preferably, the sample arm support and the lever joint connected thereto are perpendicular to each other.

[0011] Preferably, the plurality of sample arm supports are in the same plane.

[0012] Preferably, the plurality of sample arm supports are uniformly distributed around the output shaft.

[0013] Preferably, the push-pull lever sample is a hollow tubular structure.

[0014] Preferably, it further comprises a human-computer interaction unit.

[0015] The human-computer interaction unit is connected with the controller of the torque output device, and is configured to receive a user-set servo motor output torque.

[0016] In a second aspect, the present application provides a push-pull handle control comfort ergonomics testing method, which is implemented by using the testing device according to any one of the first aspect of the present application, and the method comprises the following steps:

[0017] push-pull handle size comfort testing and push-pull handle push-pull operation stroke comfort testing;

[0018] The push-pull handle size comfort testing comprises the following steps:

[0019] Adjusting the relative position of the subject and the handle sample of the testing device to a comfortable state, and setting the operation force of the handle sample as the comfortable push-pull force of the subject;

[0020] Obtaining the comfort evaluation score made by the subject after completing random simulation push-pull operations on a plurality of handle samples of different sizes;

[0021] According to a plurality of comfort evaluation scores from a plurality of subjects, a push-pull handle size meeting the comfort ergonomics requirement is calculated and obtained;

[0022] The push-pull handle push-pull operation stroke comfort testing comprises the following steps:

[0023] Adjusting the relative position of the subject and the handle sample of the testing device to a comfortable state, and setting the operation force of the handle sample as the comfortable push-pull force of the subject;

[0024] Recording the end position of the subject after completing a predetermined number of simulation push-pull operations on the handle sample from the initial position to the rear or to the right, the end position being the stop position of the subject when feeling comfortable during the simulation push-pull operation;

[0025] Calculating the operation stroke of the handle sample according to the initial position and the end position;

[0026] According to a plurality of operation strokes from a plurality of subjects, a push-pull handle push-pull operation stroke meeting the comfort ergonomics requirement is calculated and obtained.

[0027] Preferably, the method further comprises:

[0028] push-pull handle maximum push-pull operation force recommendation range testing, the categories of the push-pull operation force including forward and rear push-pull operation force, upward and downward push-pull operation force, and left and right push-pull operation force; wherein the forward and rear push-pull operation force includes elbow-high rear pull force, elbow-high forward push force, shoulder-high rear pull force, and shoulder-high forward push force, the left and right push-pull operation force includes right pull force and left push force, and the upward and downward push-pull operation force includes upward pull force and downward push force;

[0029] The test comprises:

[0030] Randomly installing the handlebar sample of the handlebar size meeting the comfort ergonomics requirement on the test device;

[0031] Recording the maximum value of the pulling and pushing force of each test in the pulling and pushing force test project completed by the subjects;

[0032] Statistically analyzing the maximum value of the pulling and pushing force of all the subjects for each test project, and taking the value between the 5th percentile and the 95th percentile as the recommended range of the maximum pulling and pushing force of the handlebar of the corresponding category of the test project;

[0033] The recommended range of the maximum pulling and pushing force of the handlebar of all categories constitutes the recommended range of the maximum pulling and pushing force of the handlebar;

[0034] The process of completing all the pulling and pushing force test projects by each subject comprises:

[0035] Adjusting the position of the handlebar sample of the test device and the initial posture of the sitting posture of the subject according to the pulling and pushing force test project, wherein the pulling and pushing force test project comprises the elbow height backward pulling test, the elbow height forward pushing test, the shoulder height backward pulling test, the shoulder height forward pushing test in the front-back direction, the right pulling test and the left pushing test in the left-right direction, and the upward pulling test and the downward pushing test in the up-down direction; the initial posture corresponding to the elbow height backward pulling test and the elbow height forward pushing test is that the upper arm naturally droops, and the forearm and the upper arm form a 90° angle; the initial posture corresponding to the shoulder height backward pulling test and the shoulder height forward pushing test is that the position of the handlebar sample is flush with the shoulder height, the arm is stretched straight forward to ensure that the forearm and the upper arm are on a straight line and are perpendicular to the body trunk; the initial posture corresponding to the right pulling test and the left pushing test is that the position of the handlebar sample is in front of the chest of the subject; the initial posture corresponding to the upward pulling test is that the arm of the subject naturally stretches straight and droops, and the initial posture corresponding to the downward pushing test is that the upper arm and the forearm of the subject form an angle of about 120°;

[0036] Fixing the trunk of the subject;

[0037] Recording the maximum value of the pulling and pushing force of each test in the pulling and pushing force classification completed by the subject.

[0038] Preferably, the pulling and pushing handlebar size comfort test further comprises:

[0039] Calculating the correlation coefficient of the pulling and pushing handlebar size meeting the comfort ergonomics requirement and the hand length data of the subject, and calculating the correlation coefficient of the pulling and pushing handlebar operation force meeting the comfort ergonomics requirement and the BMI data of the subject.

[0040] Compared with the prior art, the present application provides a complete solution for ergonomics test of manual control devices such as push-pull handle, fills the gap in the prior art, and the test device provided by the present application can conveniently replace the handle sample, can conveniently realize the rotation angle, and can adjust the output push-pull resistance according to the test requirements, covering the human-machine adaptability parameter experiment requirements of the push-pull rod. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a schematic diagram of a push-pull handle control comfort ergonomics test device provided by an embodiment of the present application;

[0042] Figure 2 is a schematic diagram of a torque output device provided by an embodiment of the present application;

[0043] Figure 3 is a real photo of a push-pull handle sample provided by an embodiment of the present application;

[0044] Figure 4 is a schematic diagram of a comfort evaluation quantity provided by an embodiment of the present application;

[0045] Figure 5 is a configuration schematic diagram of a push-pull handle control comfort ergonomics test device for force test. DETAILED DESCRIPTION

[0046] The present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0047] Embodiment One

[0048] The present embodiment provides a push-pull handle control ergonomics test device, which has a structure as shown in Figure 1 .

[0049] The push-pull handle control comfort test device includes a torque output device 1, an output shaft 2, a plurality of sample arms 3 connected with the output shaft 2, and a push-pull handle sample 4 installed on each sample arm 3. Each push-pull handle sample 4 has different sizes.

[0050] The end of the sample arm 3 is vertically connected with a handle joint for installing the push-pull handle sample 4. The handle joint is guaranteed to be consistent with the size of the sample inner hole, facilitating the replacement of the sample. As an optional embodiment, the end of the sample arm 3 is provided with the same outer size as the handle joint, so as to be suitable for directly installing the push-pull handle sample 4, thereby omitting the handle joint.

[0051] In one embodiment, the handle joint comprises a locking part connected with the sample arm, and a mounting rod connected with the locking part; the locking part can be locked at the end of the sample arm at an angle set by the user. The locking part can be realized by using the structure commonly used in the prior art, and the present embodiment is not particularly limited.

[0052] As a preferred embodiment, the output shaft 2 is sleeved with a telescopic assembly, i.e. the output shaft 2 connects each sample arm 3 via the telescopic assembly. In use, the distance between the sample arm 3 and the push-pull handle sample 4 and the torque output device 1 is adjusted, in other words, in the case where the position of the torque output device 1 is fixed, the distance between the push-pull handle sample 4 and the user is adjusted by adjusting the telescopic assembly.

[0053] In one embodiment, the telescopic assembly comprises a support sleeve and a lifting rod, which are sleeved with each other; one end of the support sleeve is sleeved on the output shaft 2, and the other end is slidably connected with one end of the lifting rod; the other end of the lifting rod is fixedly connected with a plurality of sample arms 3. A plurality of positioning holes are arranged at corresponding positions of the sleeve and the lifting rod in the telescopic direction, and the telescopic distance is fixed by means of positioning bolts or fixing knobs and the like.

[0054] In one embodiment, the telescopic assembly comprises a support sleeve and a lifting rod, which are sleeved with each other; the cross sections of the support sleeve and the lifting rod are both regular hexagons, and the end of the output shaft 2 is provided with a hexagonal connecting end suitable for fixedly connecting the support sleeve. One end of the lifting rod is sleeved in the support sleeve, and the other end is fixedly connected with a plurality of sample arms 3. A plurality of positioning holes are arranged at corresponding positions of the sleeve and the lifting rod in the telescopic direction, and the telescopic distance is fixed by means of positioning bolts or fixing knobs and the like.

[0055] As a preferred embodiment, the sample arm 3 can also be provided in a telescopic structure. In one embodiment, the sample arm 3 comprises a support column and a sliding sleeve slidably connected with each other; the sliding sleeve is in a small gap fit with the support column, and the telescopic position is fixed by means of the cooperation of the positioning holes and the fixing knobs; the cross section shape of the support column and the sliding sleeve can be circular or regular polygonal, for example, regular hexagonal. In another embodiment, the sample arm 3 comprises a support column and a sleeve threadedly connected with each other, and the outer periphery of the support column and the inner wall of the sleeve are provided with threads matched with each other, so as to realize the rotational telescopic adjustment of the sample arm 3. Figure 2 The torque output device 1 comprises a housing, a servo motor 5, a gear reducer 6 and a controller (not shown in the figure) installed in the housing; the servo motor 5 is connected with the output shaft 2 through the gear reducer 6; the controller is used to control the servo motor 5 to rotate a determined angle or to stably output a determined torque, so as to provide the tester with a required operation resistance, which is also referred to as operation force in the present embodiment.

[0056] The end of the sample arm is connected with a handle joint. The push-pull handle sample is a hollow tubular structure, which is sleeved outside the handle joint. The inner surface of the push-pull handle sample is attached to the outer periphery of the handle joint. The sample arm and the handle joint connected thereto are perpendicular to each other. As an optional embodiment, a plurality of sample arms are in the same plane.

[0057] Preferably, the plurality of sample arms are uniformly distributed around the output shaft.

[0058] As a preferred embodiment, it further comprises a human-computer interaction unit; the human-computer interaction unit is connected with the controller of the torque output device, and is used for receiving the output torque of the servo motor set by the user.

[0059] Figure 3 The push-pull handle sample required by the embodiment is shown in the actual photograph, wherein the diameters of the samples are 16, 20, 24, 26, 28, 30, 32, 34, 36, 38, 40 and 44 mm, respectively.

[0060] Embodiment two

[0061] The embodiment provides a push-pull handle operation comfort ergonomics test method, which comprises handle size comfort test and push-pull stroke comfort test, and is completed by using the push-pull handle operation comfort ergonomics test device provided in embodiment one.

[0062] The embodiment uses handle samples with different diameters, and the diameters are 16, 20, 24, 26, 28, 30, 32, 34, 36, 40 and 44 mm, respectively, and the actual object is shown in Figure 3 .

[0063] I. Push-pull handle size comfort test

[0064] The push-pull handle size in the embodiment refers to the diameter of the push-pull handle.

[0065] The handle size comfort test process comprises the following steps:

[0066] Step 1, adjust the operation force to the size that the subject feels comfortable by sending an instruction to the controller, and adjust the position of the subject to the appropriate operation position of the joystick (i.e. the handle sample);

[0067] Step 2, according to the setting, control the servo motor to rotate by the controller, and randomly output the push-pull handle samples with different diameters to the test position, i.e. rotate the handle sample to be tested to the position of the user; under each size, the subject performs 3-5 times of simulation push-pull operation, and then makes a subjective evaluation on the operation comfort of the handle diameter, and the subjective evaluation is scored by using a 7-level comfort evaluation scale, as shown in Figure 4 .

[0068] Step 3: After the test of each size sample, the subject needs to choose a size that feels the most comfortable; the tester records the subject's subjective evaluation results and the most comfortable size.

[0069] In this embodiment, 100 adults were selected to participate in the test, 50 males and 50 females, and 49 groups of valid data for males and 50 groups of valid data for females were obtained. Tables 1 and 2 list the raw data of the push-pull grip bar diameter evaluation of the male and female subjects.

[0070] Table 1: Push-pull grip bar diameter evaluation data - male

[0071]

[0072]

[0073] Table 2: Push-pull grip bar diameter evaluation data - female

[0074]

[0075]

[0076] The subjective evaluation results of each size were statistically analyzed (Table 3). For males, the acceptable range of the push-pull grip bar diameter is 28-36 mm, the comfortable range is 30-34 mm, and the relatively most comfortable size is 32 mm. For females, the acceptable range of the push-pull grip bar diameter is 26-34 mm, the comfortable range is 30-32 mm, and the relatively most comfortable size is 30 mm. Therefore, for males, the recommended range of the push-pull grip bar diameter is 28-36 mm, and for females, the recommended range of the push-pull grip bar diameter is 26-34 mm.

[0077] Table 3: Push-pull grip bar diameter evaluation result statistics

[0078]

[0079] The most comfortable push-pull grip bar diameter results were statistically analyzed (Table 4). The evaluation results of the most comfortable push-pull grip bar diameter are consistent with the subjective evaluation results, with the most comfortable push-pull grip bar diameter for males being about 32 cm and for females being about 30 cm.

[0080] The size of people's hands varies, and the size of the hand has an important influence on the selection of the most comfortable push-pull grip bar diameter. The present application further analyzes the correlation between the most comfortable push-pull grip bar diameter and the hand length data of the subjects (Table 4), and the correlation coefficients of the most comfortable push-pull grip bar diameter and the hand length are 0.51 (male) and 0.66 (female), respectively. The results show that the most comfortable push-pull grip bar diameter and the hand length have a relatively large correlation.

[0081] Table 1 Comfortable grip diameter and hand length correlation

[0082] Gender Comfort grip diameter Standard deviation Mode Correlation with hand length Male 32.78 2.5 32 0.51 Female 30.76 2.0 30 0.66

[0083] II. Push-pull grip push-pull operation stroke comfort test

[0084] This embodiment tests the push-pull operation stroke to explore the comfortable operation stroke felt by the subjects.

[0085] For push-pull grips of rotational motion, the operation stroke can be represented in two forms: rotation angle and rotation distance. The experimental results of these two forms show that the operation stroke represented by rotation angle is greatly affected by the radius of rotation, and different radii of rotation result in different results. The distance moved by the hand during push-pull operation is less affected by other factors, and the size of the radius of rotation has little effect on the appropriate distance rotated by the hand. Therefore, this embodiment takes the distance moved by the hand during push-pull as the research object of the operation stroke.

[0086] This embodiment takes the push-pull at standing elbow height as an example to conduct an ergonomics evaluation of the push-pull operation stroke. The two directions of standing elbow height backward pull and right pull are tested respectively. The initial position of the backward pull at elbow height is that the subject's forearm and upper arm form an angle of about 90°, and the upper arm naturally droops. The initial position of the right pull ensures that the joystick (grip sample) is in front of the subject's chest.

[0087] To facilitate the push-pull operation, when conducting the push-pull operation stroke test and the maximum push-pull operation force test of the push-pull grip, the configuration of the push-pull grip control comfort test device needs to be adjusted to as shown in Figure 5 , which includes a torque output device 1, an output shaft 2, a sample arm 3, and a push-pull grip sample 4 fitted at the end of the sample arm 3. That is, one set of sample arm 3 and push-pull grip sample 4 are retained, and the extra sample arm 3, push-pull grip sample 4, and all grip joints are removed. At this time, the sample arm 3 and the push-pull grip sample 4 constitute a joystick. In this way, when the subject pushes and pulls the joystick, the push-pull operation force can be recorded in real time by the test device.

[0088] The push-pull operation stroke test includes:

[0089] Step 1, adjust the initial position and operation force

[0090] Adjust the relative position of the subject and the test device grip sample to a comfortable state, and set the operation force of the grip sample to the comfortable push-pull force of the subject.

[0091] Step 2, simulate push-pull action, record push-pull stroke, and statistically analyze the results.

[0092] The push-pull stroke is measured by the ruler. The initial scale of the ruler is recorded in the initial state. The subject pulls the joystick backward or rightward for 3-5 times from the initial position. The subject stops at the comfortable position, and the tester records the scale of the ruler at the end position. The stroke of the push-pull lever is the distance of the hand movement, which is the difference between the end position scale and the initial scale.

[0093] In this embodiment, 100 people are tested, 50 men and 50 women, and 49 groups of effective male raw data and 50 groups of female raw data are obtained. Table 5 and Table 6 record the raw data of the push-pull stroke test of men and women, respectively.

[0094] Table 5 Push-pull stroke test data - male

[0095]

[0096]

[0097] Table 6 Push-pull stroke test data - female

[0098]

[0099]

[0100] The analysis of the results of the elbow backward pull stroke is as follows:

[0101] The data of the elbow backward pull stroke is analyzed and arranged. First, the initial scale in the raw data is subtracted to obtain the data of the stroke. After removing the abnormal values by the mean value ± three standard deviations, 40 groups of effective data of men and 34 groups of effective data of women are obtained. The average value, median and standard deviation of the comprehensive analysis of the evaluation results are shown in Table 7. The mean value is very close to the median, indicating that the test results are stable. Here, the mean value ± standard deviation is used as the recommended range of the backward push-pull stroke. When used, the recommended range of the stroke can also be adjusted based on the test mean value according to the actual task.

[0102] Table 7 Statistics of elbow backward pull push-pull stroke

[0103] Operating stroke / mm Mean Standard deviation Median Recommended range Male 186 32 180 154-218 Female 167 30 172 137-197

[0104] The analysis of the results of the elbow backward pull stroke is as follows:

[0105] The operation stroke data of elbow height right pulling is analyzed. First, the initial scale in the original data is subtracted to obtain the operation stroke data. After removing the abnormal values by mean ± 3 times standard deviation, 36 groups of effective data of male and 37 groups of effective data of female are obtained. The average value, median and standard deviation of the comprehensive analysis of the evaluation results are shown in Table 8. The mean value is very close to the median value, indicating that the test results are relatively stable. Here, the mean value ± standard deviation is used as the recommended range of right pushing and pulling operation stroke. When used, the recommended range of operation stroke can also be adjusted based on the test mean value according to the actual task.

[0106] Table 8 Statistics results of right pulling and pushing operation stroke

[0107]

[0108]

[0109] III. Maximum pushing and pulling operation force test of pushing and pulling handle

[0110] The maximum pushing and pulling operation force test of pushing and pulling handle is used to obtain the recommended range test of the maximum pushing and pulling operation force of the pushing and pulling handle. The categories of pushing and pulling operation force include forward and backward pushing and pulling operation force, upward and downward pushing and pulling operation force and left and right pushing and pulling operation force; wherein, the forward and backward pushing and pulling operation force includes elbow height backward pulling force, elbow height forward pushing force, shoulder height backward pulling force and shoulder height forward pushing force, the left and right pushing and pulling operation force includes right pulling force and left pushing force, and the upward and downward pushing and pulling operation force includes upward pulling force and downward pushing force;

[0111] The recommended range test method of the maximum pushing and pulling operation force of the pushing and pulling handle includes:

[0112] Install the handle sample of the size of the pushing and pulling handle meeting the requirements of comfort ergonomics on the test device;

[0113] Record the maximum value of each kind of pushing and pulling operation force of a plurality of subjects in completing all pushing and pulling operation force test items;

[0114] Statistically analyze the maximum pushing and pulling operation force of all subjects for each test item, and take the value between 5th percentile and 95th percentile as the recommended range of the maximum pushing and pulling operation force of the pushing and pulling handle corresponding to the category of the test item;

[0115] The recommended range of the maximum pushing and pulling operation force of the pushing and pulling handle of all categories constitutes the recommended range of the maximum pushing and pulling operation force of the pushing and pulling handle;

[0116] Wherein, the process of each subject completing all pushing and pulling operation force test items includes:

[0117] Adjust the position of the handle sample of the test device and the initial posture of the subject according to the pushing and pulling operation force test item;

[0118] When adjusting the position of the test device handlebar sample, the test device can be adjusted to be horizontally installed or vertically installed as needed to provide different directions of push-pull force test environment.

[0119] The push-pull operation force test items include elbow height backward pull test, elbow height forward push test, shoulder height backward pull test, shoulder height forward push test in the front-back direction; right pull test, left push test in the left-right direction; and upward pull test, downward push test in the up-down direction; the initial posture corresponding to the elbow height backward pull test and the elbow height forward push test is that the upper arm naturally droops and the forearm and the upper arm form a 90° angle; the initial posture corresponding to the shoulder height backward pull test and the shoulder height forward push test is that the handlebar sample position is flush with the shoulder height, the arm is stretched straight forward to ensure that the forearm and the upper arm are on a straight line and are perpendicular to the body trunk; the initial posture corresponding to the right pull test and the left push test is that the handlebar sample position is in front of the chest of the test subject; the initial posture corresponding to the upward pull test is that the arm of the test subject is naturally stretched straight and droops, and the initial posture corresponding to the downward push test is that the upper arm and the forearm of the test subject form an angle of about 120°;

[0120] The trunk of the test subject is fixed;

[0121] The maximum value of the push-pull operation force in each test in the push-pull operation force classification completed by the test subject within the specified time is recorded.

[0122] The embodiment measures the maximum push-pull force of the arm, considers the influence of different operation postures and operation directions on the manipulation force, and measures the maximum push-pull force of the arm in a sitting posture. The trunk of the test subject is fixed during the test process.

[0123] Human strength is greatly affected by age. With the increase of age, the strength value increases. In the range of about 20-30 years old, the strength reaches the peak value. After 30 years old, the strength gradually decreases. Therefore, the embodiment selects the youth group of 18-25 years old as the test object, and the strength values of other age groups are all less than the strength value of the youth group.

[0124] Before the test, the Martin measuring ruler is used to test the related human body dimensions of the test subject.

[0125] The height, weight and related human body workspace dimensions of the test subject are measured, including the elbow height in a sitting / standing posture, the shoulder height in a sitting / standing posture, the forearm plus hand function forward stretching length, the upper limb function forward stretching length, etc.

[0126] According to the aforementioned classification of the maximum push and pull force of human body, the maximum push and pull force in each position and direction is measured. Before the measurement, the seat and the test device provided in Embodiment 1 are first adjusted to the prescribed position, and then the torso of the subject is fixed. After the measurement starts, the tester encourages the subject by voice (shouting "Come on, come on…"), the subject exerts the maximum force as much as possible and maintains for about 3-5 seconds, and the exertion is required to be smooth without sudden exertion. The test device records the maximum value of the push and pull force of the subject, and the measurement is performed three times for each test category. If the three results differ greatly, when the coefficient of variation is greater than 5, the value with the greater difference is discarded and re-measured. The three measurements are separated by at least 30 seconds for the subject to rest. In order to reduce the influence of muscle fatigue on the measurement results, different subjects are used for the measurement in a cross manner, and after the measurement of each measurement category is completed, the next subject is arranged to perform the test, so that each subject has at least 3 minutes of rest time between different test categories.

[0127] The maximum push and pull force in 8 positions and directions in a sitting state is tested, and 100 subjects are used, 50 male and 50 female. Among them, 49 groups of effective data of male subjects and 50 groups of effective data of female subjects are obtained.

[0128] By comparing the median and average of the maximum force measurement results in each position and direction, it is found that the average and the median of the measurement results differ little, indicating that the test results are stable.

[0129] In each test position and test direction, the maximum force results are statistically analyzed, and the values between the 5th percentile and the 95th percentile are taken as the recommended value of the maximum force, i.e. the maximum force range of 90% of the people.

[0130] (1) Maximum force test results of elbow high rear pull

[0131] After removing the abnormal values, 46 groups of effective data of male subjects and 48 groups of effective data of female subjects are obtained. The average and standard deviation of the maximum force of elbow high rear pull are male: 384N±38N, female: 238N±43N, the 5th percentile value of male is 303N, the 95th percentile value is 431N, the 5th percentile value of female is 175N, and the 95th percentile value is 317N. Therefore, the maximum force of elbow high rear pull of 90% of the people is male 303N-431N, female 175N-317N, i.e. the recommended range of the maximum force of elbow high rear pull.

[0132] (2) Maximum force test results of elbow high front push

[0133] After removing outliers, the valid data were 47 groups for men and 49 groups for women. The average and standard deviation of the maximum elbow extension force were 421 N ± 26 N for men and 318 N ± 68 N for women. The 5th percentile value was 376 N for men and 183 N for women, and the 95th percentile value was 466 N for men and 404 N for women. Therefore, the maximum elbow extension force of 90% of the people tested was 376 N to 466 N for men and 183 N to 404 N for women, i.e., the recommended range of the maximum elbow extension force.

[0134] (3) Maximum shoulder extension force test results

[0135] After removing outliers, the valid data were 48 groups for men and 49 groups for women. The average and standard deviation of the maximum shoulder extension force were 397 N ± 50 N for men and 252 N ± 52 N for women. The 5th percentile value was 280 N for men and 180 N for women, and the 95th percentile value was 462 N for men and 351 N for women. Therefore, the maximum shoulder extension force of 90% of the people tested was 280 N to 462 N for men and 180 N to 351 N for women, i.e., the recommended range of the maximum shoulder extension force.

[0136] (4) Maximum shoulder extension force test results

[0137] After removing outliers, the valid data were 48 groups for men and 50 groups for women. The average and standard deviation of the maximum shoulder extension force were 422 N ± 28 N for men and 341 N ± 73 N for women. The 5th percentile value was 382 N for men and 161 N for women, and the 95th percentile value was 469 N for men and 418 N for women. Therefore, the maximum shoulder extension force of 90% of the people tested was 382 N to 469 N for men and 161 N to 418 N for women, i.e., the recommended range of the maximum shoulder extension force.

[0138] (5) Maximum right pull force test results

[0139] After removing outliers, the valid data were 47 groups for men and 48 groups for women. The average and standard deviation of the maximum right pull force were 190 N ± 42 N for men and 128 N ± 28 N for women. The 5th percentile value was 121 N for men and 89 N for women, and the 95th percentile value was 254 N for men and 176 N for women. Therefore, the maximum right pull force of 90% of the people tested was 121 N to 254 N for men and 89 N to 176 N for women, i.e., the recommended range of the maximum right pull force.

[0140] (6) Maximum left push force test results

[0141] After removing outliers, the valid data were 47 groups for males and 47 groups for females. The average and standard deviation of the maximum leftward pushing force were 198 N ± 43 N for males and 117 N ± 26 N for females. The 5th percentile value was 118 N for males and the 95th percentile value was 264 N for males. The 5th percentile value was 76 N for females and the 95th percentile value was 165 N for females. Therefore, the maximum leftward pushing force of 90% of the subjects was 117 N to 264 N for males and 76 N to 165 N for females, which were the recommended ranges of the maximum leftward pushing force.

[0142] (7) Maximum upward pulling force test results

[0143] After removing outliers, the valid data were 46 groups for males and 48 groups for females. The average and standard deviation of the maximum upward pulling force were 392 N ± 44 N for males and 257 N ± 64 N for females. The 5th percentile value was 303 N for males and the 95th percentile value was 444 N for males. The 5th percentile value was 162 N for females and the 95th percentile value was 366 N for females. Therefore, the maximum upward pulling force of 90% of the subjects was 303 N to 444 N for males and 162 N to 366 N for females, which were the recommended ranges of the maximum upward pulling force.

[0144] (8) Maximum downward pushing force test results

[0145] After removing outliers, the valid data were 48 groups for males and 47 groups for females. The average and standard deviation of the maximum downward pushing force were 338 N ± 69 N for males and 214 N ± 43 N for females. The 5th percentile value was 206 N for males and the 95th percentile value was 420 N for males. The 5th percentile value was 147 N for females and the 95th percentile value was 287 N for females. Therefore, the maximum downward pushing force of 90% of the subjects was 206 N to 420 N for males and 147 N to 287 N for females, which were the recommended ranges of the maximum downward pushing force.

[0146] Up to now, the recommended ranges of the maximum force of all 8 categories were obtained.

[0147] The above description is merely preferred embodiments of the present disclosure and a description of the technical principles of the application. Those skilled in the art should understand that the disclosure range involved in the present disclosure is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the above disclosed concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present disclosure (but not limited to) having similar functions.

Claims

1. A push-pull grip lever ergonomics test method, characterized by, The method comprises: push-pull handle size comfort test and push-pull handle push-pull operation stroke comfort test; The push-pull handle size comfort test comprises: Adjust the relative position of the subject and the handle sample of the test device to a comfortable state, and set the operation force of the handle sample to the comfortable push-pull force of the subject; Obtain the comfort evaluation score made by the subject after completing random simulation push-pull operations on a plurality of handle samples of different sizes; According to a plurality of comfort evaluation scores from a plurality of subjects, a push-pull handle size meeting the comfort ergonomics requirement is calculated and verified and corrected; The push-pull handle push-pull operation stroke comfort test comprises: Adjust the relative position of the subject and the handle sample of the test device to a comfortable state, and set the operation force of the handle sample to the comfortable push-pull force of the subject; Record the end position of the subject after completing a predetermined number of simulation push-pull operations of pulling the handle sample backward or to the right from the initial position, the end position being the stop position when the subject feels comfortable during the simulation push-pull operation; Calculate the operation stroke of the handle sample according to the initial position and the end position; According to a plurality of operation strokes from a plurality of subjects, a push-pull handle push-pull operation stroke meeting the comfort ergonomics requirement is calculated; The push-pull handle ergonomics test device comprises: A torque output device, an output shaft, and a plurality of sample arms connected to the output shaft; The sample arms are provided with handle samples; The torque output device comprises a housing, a servo motor, a gear reducer, and a controller installed in the housing; the servo motor is connected to the output shaft through the gear reducer; and the controller is used to control the servo motor to rotate by a determined angle and to stably output a determined torque, thereby providing the required operation resistance.

2. The push-pull grip lever ergonomics test method according to claim 1, wherein Further comprising: Push-pull handle maximum push-pull operation force recommendation range test, the categories of the push-pull operation force including forward-backward push-pull operation force, upward-downward push-pull operation force, and left-right push-pull operation force; wherein the forward-backward push-pull operation force includes elbow-high backward pull force, elbow-high forward push force, shoulder-high backward pull force, and shoulder-high forward push force, the left-right push-pull operation force includes rightward pull force and leftward push force, and the upward-downward push-pull operation force includes upward pull force and downward push force; The test comprises: Installing handle samples of a push-pull handle size meeting the ergonomics requirement on the test device; Recording the maximum value of each push-pull operation force in all push-pull operation force test items completed by a plurality of subjects; Statistically analyzing the maximum values of the push-pull operation force from all subjects for each test item, and taking the values between the 5th percentile and the 95th percentile as the recommended range of the maximum push-pull operation force of the push-pull handle corresponding to the category of the test item; The recommended ranges of the maximum push-pull operation force of the push-pull handle of all categories constitute the recommended range of the maximum push-pull operation force of the push-pull handle; The process of completing all push-pull operation force test items by each subject comprises: Adjust the position of the test device grip rod sample and the initial posture of the subject's sitting posture according to the push-pull operation force test project, the push-pull operation force test project including elbow height rear pull test, elbow height forward push test in the front-back direction, shoulder height rear pull test, shoulder height forward push test; right pull test, left push test in the left-right direction; and upward pull test, downward push test in the up-down direction; The initial posture corresponding to the elbow height rear pull test and the elbow height forward push test is that the upper arm naturally droops, and the forearm and the upper arm form a 90° angle; the initial posture corresponding to the shoulder height rear pull test and the shoulder height forward push test is that the grip rod sample position is flush with the shoulder height, the arm is stretched straight forward to ensure that the forearm and the upper arm are on a straight line and are perpendicular to the body trunk; the initial posture corresponding to the right pull test and the left push test is that the grip rod sample position is in front of the subject's chest; the initial posture corresponding to the upward pull test is that the subject's arm naturally stretches straight and droops, and the initial posture corresponding to the downward push test is that the subject's upper arm and forearm form an angle of about 120°; Fix the trunk of the subject; Record the maximum value of the push-pull operation force of the subject in each test in the push-pull operation force classification.

3. The push-pull grip lever ergonomics test method according to claim 1, wherein Including: The push-pull grip rod size comfort test further includes: Calculate the correlation coefficient of the push-pull grip rod size meeting the comfort ergonomics requirement and the hand length data of the subject; Calculate the correlation coefficient of the push-pull grip rod operation force meeting the comfort ergonomics requirement and the BMI of the subject.

4. The push-pull grip rod operation ergonomics test method according to claim 1, wherein: The end of the sample support arm is connected with a grip rod connector, and the push-pull grip rod sample is sleeved outside the grip rod connector.

5. The push-pull grip rod operation ergonomics test method according to claim 4, wherein: The push-pull grip rod sample is a hollow tubular structure, and the inner surface thereof is attached to the outer periphery of the grip rod connector.

6. The push-pull grip rod operation ergonomics test method according to claim 4, wherein: The sample support arm and the grip rod connector connected thereto are perpendicular to each other.

7. The push-pull grip rod operation ergonomics test method according to claim 1, wherein: The plurality of sample support arms are in the same plane.

8. The push-pull grip rod operation ergonomics test method according to claim 7, wherein: The plurality of sample support arms are uniformly distributed around the output shaft.

9. The push-pull grip rod operation ergonomics test method according to claim 1, further comprising: A human-computer interaction unit; The human-computer interaction unit is connected with the controller of the torque output device, and is used for receiving the output torque of the servo motor set by the user.

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