A linear motion load measuring device and a measuring method

Abstract

The application provides a linear motion load measuring device and a measuring method, which comprises a frame body, a first wheel set, a second wheel set, a first force transmission element, a second force transmission element, a test force applying element, a reversing operating element and a force applying counterweight, the first wheel set and the second wheel set are both rotationally connected to the frame body; one end of the first force transmission element is connected to a first end of the test force applying element, and the other end is connected to the force applying counterweight; one end of the second force transmission element is connected to a second end of the test force applying element, and the other end is connected to the force applying counterweight; the reversing operating element is installed on the frame body and is used for driving the first force transmission element to act, so that the first force transmission element transmits power to the first end of the test force applying element, or the second force transmission element transmits power to the second end of the test force applying element. The force applying counterweight, the first force transmission element, the second force transmission element and the reversing operating element are used for applying loads to the locking mechanism in different directions, so that the motion load of the locking mechanism is measured under the premise of meeting the environmental requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motion load measurement, and particularly relates to a linear motion load measurement device and a measurement method. BACKGROUND

[0002] The pin type locking mechanism is widely applied in the existing mechanical locking mechanism, and the pin type locking mechanism can realize high-strength connection and is suitable for occasions requiring to bear large load. The commonly used pin type locking mechanism includes a motor screw type pin mechanism and a hydraulic pin mechanism. In the use process of the existing motor screw type pin mechanism, the pin is extended and retracted and rubbed against the hole wall of the pin hole on the locking workpiece under the load working condition. If the torque of the motor is too small, the pin mechanism cannot be normally inserted into the pin hole on the workpiece or cannot be normally pulled out of the pin hole, and thus mechanical failure occurs, so that the pin type locking mechanism cannot work normally. Therefore, the load that can be borne by the pin type locking mechanism needs to be measured in the production process of the pin type locking mechanism, and the actual load under the actual working condition is compared, so that the produced pin type locking mechanism can meet the smooth working under the condition of needing to bear load.

[0003] The existing motion load measurement device is mostly a hydraulic cylinder or an air cylinder as a load tool. The hydraulic cylinder or the air cylinder is used as the load, and has the function of continuous force measurement, but cannot meet the environmental test requirements. The working temperature of the locking mechanism is -40 DEG C to +50 DEG C, and the normal working temperature of the hydraulic oil is 30 DEG C to 80 DEG C. The hydraulic cylinder cannot work normally in the low temperature environment, and the air cylinder contains water vapor and cannot work normally in the low temperature icing environment.

[0004] In summary, the linear motion load measurement device and the measurement method are urgently needed to solve or at least partially solve the problems in the prior art. SUMMARY

[0005] The present application aims to provide a linear motion load measurement device and a measurement method, and aims to solve the problem that the existing device cannot measure the motion load of the locking mechanism under the working condition meeting the environmental requirements. The specific technical scheme is as follows:

[0006] The application discloses a linear motion load measuring device, which comprises a frame body, a first wheel set, a second wheel set, a third wheel set, a first force transmission element, a second force transmission element, a test force applying element, a reversing operating element and a force applying counterweight.

[0007] Further, the first wheel set comprises a first guide wheel, the first guide wheel being rotationally connected to the frame body; the second wheel set comprises a second guide wheel, the second guide wheel being rotationally connected to the frame body; the first force transmission element is led out from the test force applying element, and is connected to the force applying counterweight by being sequentially led around the first guide wheel, the reversing operating element and the second guide wheel; the third wheel set comprises a third guide wheel, the second force transmission element is led out from the test force applying element, and is connected to the force applying counterweight by being led around the third guide wheel; and the reversing operating element is arranged between the first guide wheel and the second guide wheel.

[0008] Further, the reversing operating element comprises a swing frame, a fourth guide wheel and a driving assembly, the swing frame is swingably connected to the frame body, the fourth guide wheel is rotationally connected to the swing frame, the first end of the driving assembly is mounted on the frame body, and the second end of the driving assembly is used for driving the swing frame to swing so as to make the first force transmission element led around the fourth guide wheel to be tensioned or relaxed.

[0009] Further, the driving assembly is a telescopic movable rod, the first end of the telescopic movable rod is hinged to the frame body, and the second end of the telescopic movable rod is hinged to the swing frame.

[0010] Further, the first force transmission member is a first force transmission rope, a first end of the first force transmission rope is connected with the first end of the test force applying member, and a second end of the first force transmission member is connected with the force applying counterweight; the second force transmission member is a second force transmission rope, a first end of the second force transmission rope is connected with the second end of the test force applying member, and a second end of the second force transmission rope is connected with the force applying counterweight; and the first guide wheel, the second guide wheel and the third guide wheel are all pulleys.

[0011] Further, the first force transmission member is a first force transmission rope, a first end of the first force transmission rope is connected with the first end of the test force applying member, and a second end of the first force transmission member is connected with the force applying counterweight; the second force transmission member is a second force transmission rope, a first end of the second force transmission rope is connected with the second end of the test force applying member, and a second end of the second force transmission rope is connected with the force applying counterweight; and the first guide wheel, the second guide wheel and the third guide wheel are all pulleys.

[0012] Further, the test force applying member comprises a linear motion frame and an adapter, the linear motion frame is movably arranged on the frame body along a horizontal direction, one end of the linear motion frame is connected with the first force transmission member, and the other end of the linear motion frame is connected with the second force transmission member; and the adapter is detachably connected to the linear motion frame.

[0013] Further, the first wheel set further comprises a fifth guide wheel, the fifth guide wheel is rotatably mounted on the frame body, and the fifth guide wheel is arranged between the first guide wheel and the reversing operating member, and the first force transmission member sequentially passes through the first guide wheel, the fifth guide wheel and the reversing operating member.

[0014] Further, the first wheel set further comprises a first guard wheel, the third wheel set further comprises a third guard wheel, and the reversing operating member comprises a fourth guard wheel, the first guard wheel and the third guard wheel are mounted on the frame body, and the first guard wheel is arranged on one side of the first guide wheel; the third guard wheel is arranged on one side of the third guide wheel; and the fourth guard wheel is mounted on the swing frame and arranged on one side of the fourth guide wheel.

[0015] The technical scheme of the present application has the following beneficial effects:

[0016] When the initial state, the force applying weight acts on the locking mechanism through the first force transmitting member and the first wheel set along the direction of the third wheel set towards the first wheel set (i.e. the direction of the locking mechanism retraction), when measuring, the bolt of the locking mechanism is extended, so that in the process of the bolt of the locking mechanism extending, the gravity of the force applying weight and the friction between the first force transmitting member and the first wheel set and the friction between the first force transmitting member and the third wheel set acting on the bolt of the locking mechanism are opposite to the direction of the extension force of the bolt of the locking mechanism and equal in size, when the bolt of the locking mechanism can be completely extended, it indicates that the locking mechanism can work normally, and the dynamic load of the locking mechanism is greater than or equal to the combined force of the gravity of the force applying weight and the friction between the first force transmitting member and the first wheel set and the friction between the first force transmitting member and the third wheel set acting on the bolt of the locking mechanism; when the dynamic load of the locking mechanism retraction needs to be measured, the first force transmitting member is in a relaxed state through the reversing operation member, the gravity of the force applying weight and the friction between the second force transmitting member and the third wheel set act on the locking mechanism through the second force transmitting member and the third wheel set along the direction of the first wheel set towards the third wheel set (i.e. the direction of the locking mechanism extension), when measuring, the bolt of the locking mechanism is retracted, so that in the process of the bolt of the locking mechanism retracting, the combined force of the gravity of the force applying weight and the friction between the second force transmitting member and the third wheel set acting on the bolt of the locking mechanism is opposite to the direction of the retraction force of the bolt of the locking mechanism and equal in size, when the bolt of the locking mechanism can be completely retracted, it indicates that the locking mechanism can work normally, and the dynamic load of the locking mechanism is greater than or equal to the combined force of the gravity of the force applying weight and the friction between the second force transmitting member and the third wheel set acting on the bolt of the locking mechanism. Through such structure and arrangement, because the structure does not involve liquid and gas power, therefore in the use process, the accuracy of the measurement will not be affected by the change of temperature, so as to realize the convenient measurement of the dynamic load of the locking mechanism under the premise of meeting the environmental requirements.

[0017] In another aspect, the application also provides a linear motion load measuring method using the linear motion load measuring device described above, the reversing operation member has three working states, namely an initial state, a first working state and a second working state; in the initial state, the first force transmission member and the second force transmission member are both in a tension state, the force applying counterweight is in a static state under the tension of the first force transmission member and the second force transmission member, and at this time the test force applying member corresponds to the installation position of the locking mechanism to be measured on the frame; the locking mechanism to be measured is installed on the frame, and the test force applying member is connected with the bolt of the locking mechanism; when the reversing operation member swings to one side, the initial state is changed to the first working state, at this time the first force transmission member is in a force transmission tension state, and under the action of the force applying counterweight, the first force transmission member and the test force applying member act on the locking mechanism to be measured in the direction from the third wheel set to the first wheel set; the bolt of the locking mechanism is extended, if the bolt of the locking mechanism can be completely extended, it means that the load that the locking mechanism can bear is greater than or equal to the resultant force of the gravity of the force applying counterweight and the friction force of the first force transmission member, if the bolt of the locking mechanism cannot be completely extended, it means that the load that the locking mechanism can bear is less than the resultant force of the gravity of the force applying counterweight and the friction force of the first force transmission member; when the reversing operation member swings to the other side, the first working state is changed to the initial state, and continues to swing to the second working state, at this time the first force transmission member is in a relaxed state, the force applying counterweight acts on the bolt of the locking mechanism in the direction from the first wheel set to the third wheel set through the second force transmission member and the test force applying member; and the bolt of the locking mechanism is retracted, if the bolt of the locking mechanism can be completely retracted, it means that the load that the locking mechanism can bear is greater than or equal to the resultant force of the gravity of the force applying counterweight and the friction force of the second force transmission member, if the bolt of the locking mechanism cannot be completely retracted, it means that the load that the locking mechanism can bear is less than the resultant force of the gravity of the force applying counterweight and the friction force of the second force transmission member.

[0018] In addition to the objects, features and advantages described above, the application has other objects, features and advantages. Hereinafter, the application will be described in detail with reference to the accompanying drawings. Figures 1-8 The application will be described in further detail. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application and assist in

[0020] Figure 1 is a schematic diagram of the overall structure of the first force transmission member acting on the test force applying member and the locking mechanism in the extended state in the linear motion load measuring device of the application;

[0021] Figure 2It is the overall structure schematic diagram of the second force transmission member acting on the test force applying member and the locking mechanism being in the retracted state in the linear motion load measuring device of the present application;

[0022] Figure 3 It is the overall structure schematic diagram of the first force transmission member acting on the test force applying member and the locking mechanism being in the retracted state in the linear motion load measuring device of the present application;

[0023] Figure 4 It is the overall structure schematic diagram of the second force transmission member acting on the test force applying member and the locking mechanism being in the extended state in the linear motion load measuring device of the present application;

[0024] Figure 5 It is the internal structure schematic diagram of the locking mechanism;

[0025] Figure 6 It is the overall structure schematic diagram of the control box in the linear motion load measuring device of the present application;

[0026] Figure 7 It is the exploded view of the linear motion load measuring device of the present application;

[0027] Figure 8 It is the three-dimensional exploded schematic diagram of the linear motion load measuring device of the present application.

[0028] Wherein, 1, frame body; 2, first wheel set; 21, first guide wheel; 22, fifth guide wheel; 23, first guard wheel; 3, second wheel set; 4, third wheel set; 41, third guide wheel; 42, third guard wheel; 5, first force transmission member; 6, second force transmission member; 7, test force applying member; 71, linear motion frame; 72, adapter; 8, reversing operating member; 81, swing frame; 82, fourth guide wheel; 83, driving assembly; 84, fourth guard wheel; 9, force applying counterweight member; 10, control box; 101, extension button; 102, extension indicator lamp; 103, retraction button; 104, retraction indicator lamp; 11, locking mechanism. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application will be described more fully below, and preferred embodiments of the present application will be given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application.

[0031] Embodiment 1:

[0032] With reference to Figures 1-8 The embodiment provides a linear motion load measuring device, which comprises a frame body 1, a first wheel set 2, a second wheel set 3, a third wheel set 4, a first force transmission member 5, a second force transmission member 6, a test force applying member 7, a reversing operating member 8 and a force applying counterweight 9. The first wheel set 2 and the third wheel set 4 are oppositely arranged at two ends of the frame body 1, and the first wheel set 2 and the third wheel set 4 are rotatably arranged relative to the frame body 1. The test force applying member 7 and the reversing operating member 8 are both arranged between the first wheel set 2 and the third wheel set 4, the test force applying member 7 is movably arranged on the frame body 1 along a direction from the first wheel set 2 to the third wheel set 4, and the reversing operating member 8 is swingably arranged on the frame body 1. The second wheel set 3 is arranged on a side of the reversing operating member 8 away from the first wheel set 2, and the second wheel set 3 is rotatably arranged relative to the frame body 1. A first end of the first force transmission member 5 is connected with a first end of the test force applying member 7, a second end of the first force transmission member 5 sequentially passes through the first wheel set 2, the reversing operating member 8 and the second wheel set 3 and is connected with the force applying counterweight 9. A first end of the second force transmission member 6 is connected with a second end of the test force applying member 7, and a second end of the second force transmission member 6 passes around the third wheel set 4 and is connected with the force applying counterweight 9. The first force transmission member 5 is stretched between the test force applying member 7 and the force applying counterweight 9 by swinging the reversing operating member 8 to one side, and the test force applying member 7 is moved along the third wheel set 4 to the first wheel set 2 direction by the first force transmission member 5 under the action of the force applying counterweight 9. The first force transmission member 5 is in a relaxed state between the test force applying member 7 and the force applying counterweight 9 by swinging the reversing operating member 8 to the other side, and the test force applying member 7 is moved along the first wheel set 2 to the third wheel set 4 direction by the second force transmission member 6 under the action of the force applying counterweight 9.

[0033] It should be noted that the locking mechanism 11 needs to be inspected before leaving the factory, and the load of the locking mechanism 11 when the locking mechanism 11 extends and retracts needs to be inspected. Because the locking mechanism 11 needs to work in a special environment (the working temperature range spans a large range, and needs to adapt to a temperature between-40 degrees Celsius and +50 degrees Celsius), and because the existing load detection device generally uses a hydraulic cylinder or a pneumatic cylinder as a load tool, the hydraulic cylinder and the pneumatic cylinder cannot work normally at such a temperature, so the existing linear load mechanism cannot normally detect the load of the locking mechanism 11.

[0034] Specifically, the first force transmission member 5 and the second force transmission member 6 are both flexible force transmission members, the force transmission direction is changed by the cooperation of the first force transmission member 5 and the first wheel set 2 and the cooperation of the first force transmission member 5 and the second wheel set 3, the gravity of the force applying counterweight 9 acts on the test force applying member 7 along the third wheel set 4 towards the first wheel set 2, or the force transmission direction is changed by the cooperation of the second force transmission member 6 and the second wheel set 3, the gravity of the force applying counterweight 9 acts on the test force applying member 7 along the first wheel set 2 towards the third wheel set 4; specifically, the first force transmission member 5 alone acts on the first end of the test force applying member 7 along the third wheel set 4 towards the first wheel set 2 by the reversing operation member 8, or the second force transmission member 6 alone acts on the second end of the test force applying member 7 along the first wheel set 2 towards the third wheel set 4 by the swinging of the reversing operation member 8 relative to the frame 1.

[0035] It can be understood that the locking mechanism 11 is installed on the frame, and the bolt end of the locking mechanism 11 is detachably connected with the test force applying member 7. In the initial state, the force applying counterweight 9 acts on the locking mechanism 11 along the third wheel set 4 towards the first wheel set 2 through the first force transmission member 5 and the first wheel set 2 and the first force transmission member 5 and the second wheel set 3 (i.e. the direction in which the locking mechanism 11 is retracted). During the measurement, the bolt of the locking mechanism 11 is extended, so that the gravity of the force applying counterweight 9 and the frictional force of the first force transmission member 5 and the first wheel set 2 and the frictional force of the first force transmission member 5 and the second wheel set 3 together acting on the bolt are opposite in direction and equal in size to the extension force of the bolt. When the bolt can be completely extended, it indicates that the bolt can work normally, and the dynamic load of the bolt is greater than or equal to the combined force of the gravity of the force applying counterweight 9 and the frictional force of the first force transmission member 5 and the first wheel set 2 and the frictional force of the first force transmission member 5 and the second wheel set 3 acting on the bolt. When the dynamic load of the bolt retraction needs to be measured, the force applying counterweight 9 acts on the locking mechanism 11 along the first wheel set 2 towards the third wheel set 4 through the second force transmission member 6 and the second wheel set 3 (i.e. the direction in which the locking mechanism 11 is extended) by the action of the reversing operation member 8. During the measurement, the bolt of the locking mechanism 11 is retracted, so that the gravity of the force applying counterweight 9 and the frictional force of the second force transmission member 6 and the second wheel set 3 together acting on the bolt are opposite in direction and equal in size to the retraction force of the bolt. When the bolt can be completely retracted, it indicates that the bolt can work normally, and the dynamic load of the bolt is greater than or equal to the combined force of the gravity of the force applying counterweight 9 and the frictional force of the second force transmission member 6 and the second wheel set 3 acting on the bolt. By such structure and arrangement, because the structure does not involve liquid and gas power, the accuracy of the measurement will not be affected by the change of temperature during use, so the movement load of the locking mechanism 11 can be conveniently measured under the premise of meeting the environmental requirements.

[0036] It should be noted that the force applying counterweight 9 is a weight in the embodiment, and the weight of the weight can be selected according to the size and specifications of the actual locking mechanism 11. In some other embodiments of the application, the force applying counterweight 9 includes a counterweight disc in which weights are placed, and the number of weights can be adjusted according to the actual required load, so as to adjust the overall weight of the force applying counterweight 9.

[0037] Further, the first wheel set 2 includes a first guide wheel 21 rotatably connected to the frame 1, and the second wheel set 3 includes a second guide wheel rotatably connected to the frame 1. The first force transmission member 5 is led out from the test force applying member 7, and sequentially passes through the first guide wheel 21, the reversing operation member 8, and is connected to the force applying counterweight 9 through the second guide wheel. The third wheel set 4 includes a third guide wheel 41, and the second force transmission member 6 is connected to the force applying counterweight 9 after passing through the third guide wheel 41. The reversing operation member 8 is arranged between the first guide wheel 21 and the second guide wheel, and the reversing operation member 8 is used to make the force applying counterweight 9 act on the test force applying member 7 through the first force transmission member 5 along the third wheel set 4 towards the first wheel set 2, or make the force applying counterweight 9 act on the test force applying member 7 through the second force transmission member 6 along the first wheel set 2 towards the third wheel set 4.

[0038] It can be known that the force transmission direction of the first force transmission member 5 is changed through the first guide wheel 21 and the second guide wheel, and the gravity of the force applying counterweight 9 is converted into a force opposite to the extending direction of the locking mechanism 11. In the embodiment, the force applying counterweight 9 is arranged horizontally, and the gravity of the force applying counterweight 9 changes the direction of the first force transmission member 5 through the first guide wheel 21 and the second guide wheel, so as to convert the vertical downward force into a horizontal force, and the direction of the force is opposite to the extending direction of the locking mechanism 11, so as to exert a load on the locking mechanism 11 when the locking mechanism 11 is extended. Similarly, the force transmission direction of the second force transmission member 6 is changed through the third guide wheel 41, so as to convert the gravity of the force applying counterweight 9 into a force opposite to the retracting direction of the locking mechanism 11, so as to exert a load on the locking mechanism 11 when the locking mechanism 11 is retracted.

[0039] Further, the reversing operating member 8 comprises a swing frame 81, a fourth guide wheel 82 and a driving assembly 83, the first end of the swing frame 81 is swingably connected to the frame body 1 through a bearing, the second end of the swing frame 81 is connected with the fourth guide wheel 82 through a bearing, the first end of the driving assembly 83 is installed on the frame body 1, and the second end of the driving assembly 83 is used to drive the swing frame 81 to swing so as to tighten or relax the first force transmission member 5 around the fourth guide wheel 82. The driving assembly 83 is a telescopic movable rod, the first end of the telescopic movable rod is hinged to the frame body 1, and the second end of the telescopic movable rod is hinged to the swing frame 81. Specifically, the telescopic movable rod is an electric push rod, and of course in other embodiments, the telescopic movable rod can also be a component or structure capable of telescopic movement.

[0040] It can be understood that by retracting the electric push rod, the swing frame 81 is pulled to swing, so that the first force transmission member 5 is tightened, when the first force transmission member 5 is tightened, the gravity of the force applying counterweight 9 is transmitted to the bolt of the locking mechanism 11 through the first force transmission member 5 in the direction of retracting the locking mechanism 11, at this time, the second force transmission member 6 is in a relaxed state and does not work; the electric push rod is extended, and the swing frame 81 is pushed to swing, so that the first force transmission member 5 is in a relaxed state, at this time, the second force transmission member 6 is in a tightened state, at this time, the second force transmission member 6 is in a tightened state, the gravity of the force applying counterweight 9 is transmitted to the bolt of the locking mechanism 11 through the second force transmission member 6 in the direction of extending the locking mechanism 11. In some other embodiments, the driving assembly 83 can also be other structures or components capable of driving the swing frame 81 to swing, such as a motor, etc., the motor is installed on the frame body 1, the output shaft of the motor is connected with the swing shaft of the swing frame 81, and the swing frame 81 is directly driven to swing relative to the frame body 1 by the motor. The fourth guide wheel 82 is used for guiding, and in addition, the fourth guide wheel 82 is rotatably connected to the second end of the swing frame 81 through a bearing, so as to reduce the frictional force in the guiding process.

[0041] It should be noted that in some other embodiments of the present application, the reversing operating member 8 can be replaced by an electric push rod and a guide wheel, the first end of the electric push rod is fixedly connected to the frame body 1, the guide wheel is rotatably connected to the second end of the electric push rod, and the guide wheel is arranged towards the first force transmission member 5, the first force transmission member 5 is tightened by extending the electric push rod, and when the first force transmission member 5 is retracted, the first force transmission member 5 is in a relaxed state, which can achieve the same reversing effect as the above-mentioned reversing operating member 8.

[0042] As a preferred embodiment, the first force transmission member 5 is a first force transmission rope, the first end of the first force transmission rope is fixedly connected with the first end of the test force applying member 7, and the second end of the first force transmission member 5 is fixedly connected with the force applying counterweight 9; the second force transmission member 6 is a second force transmission rope, the first end of the second force transmission rope is fixedly connected with the second end of the test force applying member 7, and the second end of the second force transmission rope is fixedly connected with the force applying counterweight 9; the first guide wheel 21, the second guide wheel and the third guide wheel 41 are all pulleys, and the first guide wheel 21, the second guide wheel and the third guide wheel 41 are all rotatably connected to the frame body 1 through bearings.

[0043] It can be known that the first force transmission rope and the second force transmission rope are flexible structures, the first force transmission rope and the second force transmission rope are guided through the first guide wheel 21, the second guide wheel and the third guide wheel 41, the force transmission direction of the first force transmission rope and the second force transmission rope can be conveniently changed, so that the gravity of the force applying counterweight 9 can be conveniently applied to the locking mechanism 11 along a designed direction, and the first force transmission rope is controlled to be tensioned or relaxed through the reversing operation member 8, so that the mutual switching of the first force transmission rope and the second force transmission rope is realized. It should be noted that the first force transmission rope can be a wire rope, a nylon rope or the like.

[0044] Further, the test force applying member 7 comprises a linear motion frame 71 and an adapter 72, the linear motion frame 71 is movably arranged on the frame body 1 in a horizontal direction, one end of the linear motion frame 71 is connected with the first force transmission member 5, and the other end of the linear motion frame 71 is connected with the second force transmission member 6; and the adapter 72 is detachably connected to the linear motion frame 71.

[0045] It can be known that the linear motion frame 71 is a square frame, the inside of the linear motion frame 71 has a square cavity region, which is convenient for mounting the locking mechanism 11, the first end of the adapter 72 is detachably connected to the linear motion frame 71, and the second end of the adapter 72 is detachably connected to the bolt of the locking mechanism 11 through a thread, so that the linear motion frame 71 is pulled in different directions through the first force transmission member 5 and the second force transmission member 6, thereby realizing the application of a motion load to the locking mechanism.

[0046] Further, the first wheel set 2 further comprises a fifth guide wheel 22, the fifth guide wheel 22 is mounted on the frame body 1, and the fifth guide wheel 22 is arranged between the first guide wheel 21 and the reversing operation member 8, and the first force transmission member 5 passes through the first guide wheel 21, the fifth guide wheel 22 and the reversing operation member 8 in sequence.

[0047] It can be known that the fifth guide wheel 22 is arranged below the first guide wheel 21, through the arrangement of the fifth guide wheel 22, the position of the first force transmission member 5 is changed, so that the reversing operation member 8 can better tension and relax the first force transmission, thereby facilitating the operation of the reversing operation member 8.

[0048] Further, the first wheel set 2 further comprises a first wheel guard 23, the third wheel set 4 further comprises a third wheel guard 42, and the reversing operating member 8 comprises a fourth wheel guard 84, the first wheel guard 23 and the third wheel guard 42 are installed on the frame body 1, and the first wheel guard 23 is arranged on one side of the first guide wheel 21; the third wheel guard 42 is arranged on one side of the third guide wheel 41; and the fourth wheel guard 84 is installed on the swing frame 81, and the fourth wheel guard 84 is arranged on one side of the fourth guide wheel 82.

[0049] It can be known that when the first force transmission rope is in a relaxed state, the first force transmission rope is easy to be separated from the first guide wheel 21, by arranging the first wheel guard 23 on one side of the first guide wheel 21, the first force transmission rope is limited between the first guide wheel 21 and the first wheel guard 23, so that the first force transmission rope is prevented from being separated from the first guide wheel 21 when the first force transmission rope is in the relaxed state. Of course, the first wheel guard 23 can also be replaced by other structures, such as a guide ring, the guide ring is installed on the frame body 1, and the first force transmission rope is limited between the guide ring and the first guide wheel 21 by the guide ring, so that the first force transmission rope is prevented from being separated from the first guide wheel 21. Similarly, the third wheel guard 42 and the fourth wheel guard 84 have basically the same structure and function as the first wheel guard 23, and details are not described here.

[0050] It is worth noting that the locking mechanism 11 is fixedly connected to the frame body 1 in a horizontal direction, the bolt in the locking mechanism 11 extends or retracts in the horizontal direction, and the straight line motion frame 71 and the adapter 72 in the test force applying member 7 are arranged horizontally, so that the potential energy of the bolt and the test force applying member 7 does not change during the extension or retraction of the bolt.

[0051] In addition, the device is also attached with a control box 10, the control box 10 is provided with an extension button 101, an extension indicator lamp 102, a retraction button 103, and a retraction indicator lamp 104. The extension button 101 and the retraction button 103 are used to control the extension or retraction action of the locking mechanism 11, and the extension indicator lamp 102 and the retraction indicator lamp 104 are used to prompt whether the bolt of the locking mechanism 11 is extended or retracted to the position.

[0052] The operation process and working principle of the application are as follows:

[0053] The locking mechanism 11 is installed on the frame 1, and the corresponding size of the force applying counterweight 9 is selected according to the size and model of the locking mechanism 11. In the initial state, the locking mechanism 11 is in the retracted state, the retraction indicator light 104 is in the on state, the first transmission rope is in the tension state under the action of the reversing operating member 8, the second transmission rope is in the relaxed state, and the weight of the force applying counterweight 9 acts on the latch of the locking mechanism 11 through the first transmission rope, the first guide wheel 21, the second guide wheel, and the fourth guide wheel 82 in the direction opposite to the extension direction of the locking mechanism 11 (i.e. the direction of the third wheel set 4 towards the first wheel set 2). Press the extension switch. If the latch of the locking mechanism 11 can be completely extended, it means that the load that the locking mechanism 11 can withstand when extended is greater than or equal to the combined force of the weight of the force applying counterweight 9 and the friction force on the first transmission rope. When the locking mechanism 11 is completely extended, the retraction indicator light 104 is turned off, and the extension indicator light 102 is turned on. If the latch of the locking mechanism 11 cannot be extended, it means that the load that the locking mechanism 11 can withstand when extended is less than the combined force of the weight of the force applying counterweight 9 and the friction force on the first transmission rope.

[0054] When it is necessary to measure the load during retraction, the reversing operating member 8 is operated to drive the swing frame 81 to swing, and the first transmission rope is in the relaxed state, and the second transmission rope is in the tension state. At this time, the weight of the force applying counterweight 9 acts on the latch of the locking mechanism 11 through the second transmission rope and the third guide wheel 41 in the direction opposite to the retraction direction of the locking mechanism 11 (i.e. the direction of the first wheel set 2 towards the third wheel set 4). Press the retraction switch. If the latch of the locking mechanism 11 can be completely retracted, it means that the load that the locking mechanism 11 can withstand when retracted is greater than or equal to the combined force of the weight of the force applying counterweight 9 and the friction force on the second transmission rope. When the locking mechanism 11 is completely retracted, the extension indicator light 102 is turned off, and the retraction indicator light 104 is turned on. If the latch of the locking mechanism 11 cannot be retracted, it means that the load that the locking mechanism 11 can withstand when retracted is less than the combined force of the weight of the force applying counterweight 9 and the friction force on the second transmission rope.

[0055] It should be noted that the load F 推 and the load F 拉 during retraction of the locking mechanism 11 are calculated as follows:

[0056] During the extension movement, there are friction forces between the first transmission rope and the first guide wheel 21, the first transmission rope and the second guide wheel, the first transmission rope and the fourth guide wheel 82, and the first transmission rope and the fifth guide wheel 22 (briefly described as the friction force between the transmission rope and the guide wheel); there are also friction forces between the corresponding bearings of the first guide wheel 21, the second guide wheel, the fourth guide wheel 82, and the fifth guide wheel 22 (briefly described as the friction force of the guide wheel bearing). The transmission efficiency between the transmission rope and the guide wheel and the transmission efficiency between the corresponding bearings of the guide wheel are 98% and 98% respectively. When stress analysis is performed, the influence of the friction force needs to be considered, and the stress condition is as follows:

[0057] η1=(0.98×0.98) 4 =0.85

[0058]

[0059] wherein: F 推 is the thrust provided by the motor of the locking mechanism 11, F f1 is the friction force borne by the first transmission rope, m is the weight of the weight of the force applying counterweight 9, and η1 is the transmission efficiency of the first transmission member 5 (multiplied by four times because the first transmission rope needs to pass through four groups of guide wheels in turn).

[0060] During the retraction movement, there are also friction forces between the third guide wheel 41 and the second transmission rope, and the friction force of the corresponding bearing of the third guide wheel 41, and the transmission efficiencies are 98% and 98% respectively. When stress analysis is performed, the influence of the friction force needs to be considered, and the stress condition is as follows:

[0061] η2=0.98×0.98=0.96

[0062]

[0063] wherein: F 拉 is the pulling force provided by the motor of the locking mechanism 11, F f2 is the friction force borne by the second transmission rope, and η2 is the transmission efficiency of the second transmission member 6.

[0064] Embodiment 2:

[0065] Compared with Embodiment 1, the difference between this embodiment and Embodiment 1 is that in this embodiment, the first transmission member 5 is a first transmission chain, the first end of the first transmission chain is connected with the first end of the test force applying member 7, and the second end of the first transmission chain is connected with the force applying counterweight 9; the second transmission member 6 is a second transmission chain, the first end of the second transmission chain is connected with the second end of the test force applying member 7, and the second end of the second transmission chain is connected with the force applying counterweight 9; the first guide wheel 21, the second guide wheel, and the third guide wheel 41 are all chain wheels.

[0066] It can be known that the first transmission chain has the same flexible force transmission performance as the first transmission rope, that is, the first transmission chain can also conveniently change the force transmission direction and can transmit the gravity of the force applying counterweight 9 to the bolt of the locking mechanism 11 in the direction opposite to the extension direction of the locking mechanism 11; the second transmission chain transmits the gravity of the force applying counterweight 9 to the bolt of the locking mechanism 11 in the direction opposite to the retraction direction of the locking mechanism 11. Compared with the first transmission rope and the second transmission rope, the first transmission chain and the second transmission chain can bear heavier weight.

[0067] The rest is basically the same as that of Example 1, which will not be repeated here.

[0068] Example 3

[0069] The embodiment provides a linear motion load measurement method, adopts the linear motion load measurement device in Example 1, the reversing operation piece 8 has three working states, which are an initial state, a first working state and a second working state; in the initial state, the first force transmission piece 5 and the second force transmission piece 6 are in a tension state, the force applying counterweight 9 is in a static state under the action of the tension of the first force transmission piece 5 and the second force transmission piece 6, and at this time, the test force applying piece 7 corresponds to the installation position of the locking mechanism 11 to be measured on the frame body 1; the locking mechanism 11 to be measured is installed on the frame body 1, and the test force applying piece 7 is connected with the bolt of the locking mechanism 11; when the reversing operation piece 8 swings to one side, the initial state changes to the first working state, at this time, the first force transmission piece 5 is in a force transmission tension state, and under the action of the force applying counterweight 9, the first force transmission piece 5 and the test force applying piece 7 act on the locking mechanism 11 in the direction from the third wheel set 4 to the first wheel set 2; the bolt of the locking mechanism 11 is extended, if the bolt of the locking mechanism 11 can be completely extended, it indicates that the load that the locking mechanism 11 can bear is greater than or equal to the resultant force of the gravity of the force applying counterweight 9 and the friction force borne by the first force transmission piece 5, if the bolt of the locking mechanism 11 cannot be completely extended, it indicates that the load that the locking mechanism 11 can bear is less than the resultant force of the gravity of the force applying counterweight 9 and the friction force borne by the first force transmission piece 5; when the reversing operation piece 8 swings to the other side, the first working state changes to the initial state, and continues to change to the second working state, at this time, the first force transmission piece 5 is in a relaxed state, the force applying counterweight 9 acts on the bolt of the locking mechanism 11 in the direction from the first wheel set 2 to the third wheel set 4 through the second force transmission piece 6 and the test force applying piece 7; and the bolt of the locking mechanism 11 is retracted, if the bolt of the locking mechanism 11 can be completely retracted, it indicates that the load that the locking mechanism 11 can bear is greater than or equal to the resultant force of the gravity of the force applying counterweight 9 and the friction force borne by the second force transmission piece 6, if the bolt of the locking mechanism 11 cannot be completely retracted, it indicates that the load that the locking mechanism 11 can bear is less than the resultant force of the gravity of the force applying counterweight 9 and the friction force borne by the second force transmission piece 6.

[0070] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A linear motion load measuring device, characterized by: The device comprises a frame (1), a first wheel set (2), a second wheel set (3), a third wheel set (4), a first force transmission member (5), a second force transmission member (6), a test force applying member (7), a reversing operation member (8) and a force applying counterweight (9); The first wheel set (2) and the third wheel set (4) are oppositely arranged at two ends of the frame (1), and the first wheel set (2) and the third wheel set (4) are rotatably arranged relative to the frame (1); The test force applying member (7) and the reversing operation member (8) are both arranged between the first wheel set (2) and the third wheel set (4), the test force applying member (7) is movably arranged on the frame (1) along the direction of the first wheel set (2) towards the third wheel set (4), and the reversing operation member (8) is swingably arranged on the frame (1), the second wheel set (3) is arranged on the side of the reversing operation member (8) away from the first wheel set (2), and the second wheel set (3) is rotatably arranged relative to the frame (1); The first end of the first force transmission member (5) is connected with the first end of the test force applying member (7), and the second end of the first force transmission member (5) sequentially passes through the first wheel set (2), the reversing operation member (8) and the second wheel set (3) and is connected with the force applying counterweight (9); The first end of the second force transmission member (6) is connected with the second end of the test force applying member (7), and the second end of the second force transmission member (6) bypasses the third wheel set (4) and is connected with the force applying counterweight (9); The first force transmission member (5) is tensioned between the test force applying member (7) and the force applying counterweight (9) by swinging the reversing operation member (8) towards one side, and the test force applying member (7) is moved along the third wheel set (4) towards the first wheel set (2) by the first force transmission member (5) under the action of the force applying counterweight (9); the first force transmission member (5) is in a relaxed state between the test force applying member (7) and the force applying counterweight (9) by swinging the reversing operation member (8) towards the other side, and the test force applying member (7) is moved along the first wheel set (2) towards the third wheel set (4) by the second force transmission member (6) under the action of the force applying counterweight (9).

2. The linear motion load measuring device according to claim 1, wherein: The first wheel set (2) comprises a first guide wheel (21) rotatably connected to the frame (1); The second wheel set (3) comprises a second guide wheel rotatably connected to the frame (1); the first force transmission member (5) is led out from the test force applying member (7) and connected to the force applying counterweight (9) through the second guide wheel after bypassing the first guide wheel (21) and the reversing operation member (8) in sequence; The third wheel set (4) comprises a third guide wheel (41), and the second force transmission member (6) is led out from the test force applying member (7) and connected to the force applying counterweight (9) after bypassing the third guide wheel (41). The reversing operation member (8) is arranged between the first guide wheel (21) and the second guide wheel.

3. The linear motion load measuring device according to claim 2, wherein: The reversing operation member (8) comprises a swing frame (81), a fourth guide wheel (82) and a driving assembly (83), the swing frame (81) is swingably connected to the frame body (1), the fourth guide wheel (82) is rotatably connected to the swing frame (81), the first end of the driving assembly (83) is installed on the frame body (1), and the second end of the driving assembly (83) is used to drive the swing frame (81) to swing to tension or relax the first force transmission member (5) around the fourth guide wheel (82).

4. The linear motion load measuring device according to claim 3, wherein: The driving assembly (83) is a telescopic movable rod, the first end of the telescopic movable rod is hinged to the frame body (1), and the second end of the telescopic movable rod is hinged to the swing frame (81).

5. The linear motion load measuring device according to claim 2, wherein: The first force transmission member (5) is a first force transmission rope, the first end of the first force transmission rope is connected to the first end of the test force applying member (7), and the second end of the first force transmission rope is connected to the force applying counterweight (9); the second force transmission member (6) is a second force transmission rope, the first end of the second force transmission rope is connected to the second end of the test force applying member (7), and the second end of the second force transmission rope is connected to the force applying counterweight (9); The first guide wheel (21), the second guide wheel and the third guide wheel (41) are all pulleys.

6. The linear motion load measuring device according to claim 2, wherein: The first force transmission member (5) is a first force transmission chain, the first end of the first force transmission chain is connected to the first end of the test force applying member (7), and the second end of the first force transmission chain is connected to the force applying counterweight (9); the second force transmission member (6) is a second force transmission chain, the first end of the second force transmission chain is connected to the second end of the test force applying member (7), and the second end of the second force transmission chain is connected to the force applying counterweight (9); The first guide wheel (21), the second guide wheel and the third guide wheel (41) are all sprockets.

7. The linear motion load measuring device according to claim 1, wherein: The test force applying member (7) comprises a linear motion frame (71) and an adapter (72), the linear motion frame (71) is movably arranged on the frame body (1) in the horizontal direction, one end of the linear motion frame (71) is connected to the first force transmission member (5), and the other end of the linear motion frame (71) is connected to the second force transmission member (6); The adapter (72) is detachably connected to the linear motion frame (71).

8. The linear motion load measuring device according to claim 2, wherein: The first wheel set (2) further comprises a fifth guide wheel (22) rotatably mounted on the frame (1), and the fifth guide wheel (22) is arranged between the first guide wheel (21) and the reversing operating member (8), and the first force transmission member (5) sequentially passes through the first guide wheel (21), the fifth guide wheel (22) and the reversing operating member (8).

9. The linear motion load measuring device according to claim 3, wherein: The first wheel set (2) further comprises a first guard wheel (23), the third wheel set (4) further comprises a third guard wheel (42), and the reversing operating member (8) comprises a fourth guard wheel (84), wherein the first guard wheel (23) and the third guard wheel (42) are mounted on the frame (1), and the first guard wheel (23) is arranged on one side of the first guide wheel (21); the third guard wheel (42) is arranged on one side of the third guide wheel (41); and the fourth guard wheel (84) is mounted on the swing frame (81), and the fourth guard wheel (84) is arranged on one side of the fourth guide wheel (82).

10. A method of measuring a linear motion load, characterized by: The linear motion load measuring device according to any one of claims 1-9, wherein the reversing operating member (8) has three working states, namely an initial state, a first working state and a second working state; In the initial state, the first force transmission member (5) and the second force transmission member (6) are in a tension state, the force applying counterweight (9) is in a static state under the tension of the first force transmission member (5) and the second force transmission member (6), and at this time, the test force applying member (7) corresponds to the installation position of the lock mechanism (11) to be tested on the frame (1); the lock mechanism (11) to be tested is installed on the frame (1), and the test force applying member (7) is connected with the latch of the lock mechanism (11); When the reversing operating member (8) swings to one side, the initial state changes to the first working state, at this time, the first force transmission member (5) is in a force transmission tension state, and under the action of the force applying counterweight (9), the first force transmission member (5) and the test force applying member (7) act on the lock mechanism (11) in the direction from the third wheel set (4) to the first wheel set (2); the latch of the lock mechanism (11) is extended, if the latch of the lock mechanism (11) can be completely extended, it indicates that the load that the lock mechanism (11) can bear is greater than or equal to the combined force of the gravity of the force applying counterweight (9) and the friction force of the first force transmission member (5), if the latch of the lock mechanism (11) cannot be completely extended, it indicates that the load that the lock mechanism (11) can bear is less than the combined force of the gravity of the force applying counterweight (9) and the friction force of the first force transmission member (5); When the reversing operating member (8) swings towards the other side, it changes from the first working state to the initial state, and continues to swing to change to the second working state, at this time the first force transmission member (5) is in a relaxed state, the force applying counterweight (9) acts on the latch of the locking mechanism (11) along the direction from the first wheel set (2) to the third wheel set (4) through the second force transmission member (6) and the test force applying member (7); and the latch of the locking mechanism (11) is retracted, if the latch of the locking mechanism (11) can be completely retracted, it indicates that the load that the locking mechanism (11) can bear is greater than or equal to the resultant force of the gravity of the force applying counterweight (9) and the friction force borne by the second force transmission member (6), if the latch of the locking mechanism (11) cannot be completely retracted, it indicates that the load that the locking mechanism (11) can bear is less than the resultant force of the gravity of the force applying counterweight (9) and the friction force borne by the second force transmission member (6).

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