Device and method for measuring linear motion load

Abstract

The invention provides a linear motion load measuring device and method, and the device comprises a frame body, a first wheel set, a second wheel set, a first force transmission member, a second force transmission member, a test force application member, a reversing operation member, and a force application counterweight member, and the first wheel set and the second wheel set are rotatably connected to the frame body; one end of the first force transmission piece is connected with the first end of the test force application piece, and the other end is connected with the force application counterweight piece; one end of the second force transmission piece is connected with the second end of the test force application piece, and the other end is connected with the force application counterweight piece; the reversing operation piece is installed on the frame body and used for driving the first force transmission piece to act, so that the first force transmission piece transmits power to act on the first end of the test force application piece, or the second force transmission piece transmits power to act on the second end of the test force application piece. According to the application, the force application counterweight piece, the first force transmission piece, the second force transmission piece and the reversing operation piece are adopted to apply loads to the locking mechanism along different directions, and measurement of the motion load of the locking mechanism is realized on the premise of meeting environmental requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of motion load measurement, and in particular to a device and method for measuring a linear motion load. Background Art

[0002] The latch-type locking mechanism is widely used in existing mechanical locking mechanisms. The latch-type locking mechanism can achieve high-strength connection and is suitable for occasions that need to withstand large loads. The more commonly used latch-type locking mechanisms include motor screw latch mechanisms and hydraulic latch mechanisms. During use, the existing motor screw latch mechanism needs to be operated under load conditions, and the extension and retraction of the latch causes friction with the hole wall of the latch hole on the locking workpiece. If the torque of the motor is too small, it is easy to cause the latch mechanism to fail to be normally inserted into the latch hole on the workpiece or to fail to be normally pulled out of the latch hole, which in turn causes mechanical failures and makes the latch-type locking mechanism unable to work normally. Therefore, in the production process of the latch-type locking mechanism, it is necessary to measure the load that the latch-type locking mechanism can withstand and compare it with the actual load under actual working conditions. It is necessary to make the produced latch-type locking mechanism able to work smoothly when it needs to bear the load.

[0003] Most of the existing equipment for measuring motion loads uses hydraulic cylinders or pneumatic cylinders as load tools. Although hydraulic cylinders and pneumatic cylinders have the function of continuous force measurement, they do not meet the requirements of environmental testing. The locking mechanism can withstand an ambient temperature of -40℃ to +50℃ when working, and the normal working temperature of hydraulic oil is 30~80℃. It cannot work normally in low temperature environment; the cylinder contains water vapor and cannot work normally when frozen at low temperature.

[0004] In summary, there is an urgent need for a linear motion load measurement device and a measurement method to solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a linear motion load measurement device and a measurement method, aiming to solve the problem that the existing equipment cannot measure the motion load of the locking mechanism under the working conditions that meet the environmental requirements. The specific technical solution is as follows:

[0006] A device for measuring a linear motion load comprises a frame, a first wheel group, a second wheel group, a third wheel group, a first force transmission member, a second force transmission member, a test force application member, a reversing operating member and a force counterweight member; the first wheel group and the third wheel group are relatively arranged at two ends of the frame, and the first wheel group and the third wheel group are rotatably arranged relative to the frame; the test force application member and the reversing operating member are both arranged between the first wheel group and the third wheel group, the test force application member is movably arranged on the frame along the direction of the first wheel group toward the third wheel group, the reversing operating member is swingably arranged on the frame, the second wheel group is arranged on a side of the reversing operating member away from the first wheel group, and the second wheel group is rotatably arranged relative to the frame; the first end of the first force transmission member is connected to the first end of the test force application member, The second end of the member passes through the first wheel group, the reversing operating member and the second wheel group in sequence and is connected to the force-applying counterweight member; the first end of the second force transmission member is connected to the second end of the test force-applying member, and the second end of the second force transmission member bypasses the third wheel group and is connected to the force-applying counterweight member; the reversing operating member is swung toward one side so that the first force transmission member is stretched between the test force-applying member and the force-applying counterweight member, and under the action of the force-applying counterweight member, the test force-applying member is driven to move along the third wheel group toward the first wheel group through the first force transmission member; the reversing operating member is swung toward the other side so that the first force transmission member is in a relaxed state between the test force-applying member and the force-applying counterweight member, and under the action of the force-applying counterweight member, the test force-applying member is driven to move along the first wheel group toward the third wheel group through the second force transmission member.

[0007] Furthermore, the first wheel group includes a first guide wheel, which is rotatably connected to the frame; the second wheel group includes a second guide wheel, which is rotatably connected to the frame; the first force transmission member is led out from the test force member, and successively bypasses the first guide wheel and the reversing operating member, and then is connected to the force counterweight member through the second guide wheel; the third wheel group includes a third guide wheel, and the second force transmission member is led out from the test force member, and bypasses the third guide wheel to be connected to the force counterweight member; the reversing operating member is arranged between the first guide wheel and the second guide wheel.

[0008] Furthermore, the reversing operating member includes 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 rotatably connected to the swing frame, the first end of the driving assembly is installed on the frame body, and the second end of the driving assembly is used to drive the swing frame to swing so that the first force transmission member bypassing the fourth guide wheel is tensioned or relaxed.

[0009] Furthermore, the driving component is a telescopic movable rod, a first end of the telescopic movable rod is hinged on the frame body, and a second end of the telescopic movable rod is hinged on the swing frame.

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

[0011] Furthermore, the first force transmission member 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 member, and the second end of the first force transmission chain is connected to the force counterweight member; the second force transmission member 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 member, and the second end of the second force transmission chain is connected to the force counterweight member; the first guide wheel, the second guide wheel and the third guide wheel are all sprockets.

[0012] Furthermore, the test force-applying member includes a linear motion frame and an adapter. The linear motion frame is movably arranged on the frame along the horizontal direction. One end of the linear motion frame is connected to the first force transmission member, and the other end of the linear motion frame is connected to the second force transmission member; the adapter is detachably connected to the linear motion frame.

[0013] Furthermore, the first wheel group also includes a fifth guide wheel, which is rotatably mounted on the frame and arranged between the first guide wheel and the reversing operating member, and the first force transmission member sequentially bypasses the first guide wheel, the fifth guide wheel and the reversing operating member.

[0014] Furthermore, the first wheel group also includes a first guard wheel, the third wheel group also includes a third guard wheel, the reversing operating member includes a fourth guard wheel, the first guard wheel and the third guard wheel are installed 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; the fourth guard wheel is installed on the swing frame, and the fourth guard wheel is arranged on one side of the fourth guide wheel.

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

[0016] In the initial state, the force-applying counterweight acts on the locking mechanism through the first force transmission member and the first wheel group along the direction of the third wheel group toward the first wheel group (i.e., the direction in which the locking mechanism is retracted). During measurement, the pin of the locking mechanism is extended, so that during the process of extending the pin of the locking mechanism, the combined force of the gravity of the force-applying counterweight, the friction between the first force transmission member and the first wheel group, and the friction between the first force transmission member and the third wheel group acting on the pin of the locking mechanism is opposite to the extension force of the pin of the locking mechanism and is equal in magnitude. When the pin of the locking mechanism can be fully extended, it means 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 counterweight, the friction between the first force transmission member and the first wheel group, and the friction between the first force transmission member and the third wheel group acting on the pin of the locking mechanism; and it is necessary to measure the contraction of the locking mechanism When the dynamic load is returned, the reversing operating member is actuated to make the first force transmission member in a relaxed state, and the gravity of the force counterweight member and the friction force between the second force transmission member and the third wheel group act on the locking mechanism through the second force transmission member and the third wheel group along the direction of the first wheel group toward the third wheel group (i.e. the direction in which the locking mechanism extends). During measurement, the pin of the locking mechanism is retracted, so that during the retraction process of the pin of the locking mechanism, the resultant force of the gravity of the force counterweight member and the friction force between the second force transmission member and the third wheel group acting on the pin of the locking mechanism is opposite to the direction and equal to the retraction force of the pin of the locking mechanism. When the pin of the locking mechanism can be fully 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 resultant force of the gravity of the force counterweight member and the friction force between the second force transmission member and the third wheel group acting on the pin of the locking mechanism. With such a structure and arrangement, since the structure does not involve liquid and gas dynamics, the measurement accuracy will not be affected by temperature changes during use, so the motion load of the locking mechanism can be conveniently measured while meeting environmental requirements.

[0017] On the other hand, a method for measuring a linear motion load is also provided. Using the above-mentioned linear motion load measuring device, the reversing operating 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 tensioned state, and the force counterweight member is in a stationary state under the pulling force of the first force transmission member and the second force transmission member, and at this time, the test force member corresponds to the installation position of the locking mechanism to be tested on the frame; the locking mechanism to be tested is installed on the frame, and the test force member is connected to the pin of the locking mechanism; when the reversing operating member swings toward one side, it changes from the initial state to the first working state, at which time the first force transmission member is in a force transmission tensioned state, and under the action of the force counterweight member, the first force transmission member and the test force member act on the locking mechanism to be tested along the direction of the third wheel group toward the first wheel group; the pin of the locking mechanism is extended. If the pin of the locking mechanism can be fully extended, it means that the locking mechanism can The load borne is greater than or equal to the combined force of the gravity of the force counterweight and the friction force received by the first force transmission member. If the pin of the locking mechanism cannot be fully extended, it means that the load that the locking mechanism can withstand is less than the combined force of the gravity of the force counterweight and the friction force received by the first force transmission member; when the reversing operating member swings toward the other side, it changes from the first working state 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, so that the force counterweight acts on the pin of the locking mechanism along the direction of the first wheel group toward the third wheel group through the second force transmission member and the test force transmission member; and retracts the pin of the locking mechanism. If the pin of the locking mechanism can be fully retracted, it means that the load that the locking mechanism can withstand is greater than or equal to the combined force of the gravity of the force counterweight and the friction force received by the second force transmission member. If the pin of the locking mechanism cannot be fully retracted, it means that the load that the locking mechanism can withstand is less than the combined force of the gravity of the force counterweight and the friction force received by the second force transmission member.

[0018] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1-Figure 8 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of a linear motion load measuring device of the present invention, in which a first force transmission member acts on a test force application member and a locking mechanism is in an extended state;

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

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

[0023] Figure 4 It is a schematic diagram of the overall structure of a linear motion load measuring device of the present invention, in which a second force transmission member acts on a test force application member and a locking mechanism is in an extended state;

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

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

[0026] Figure 7 It is an exploded view of a device for measuring a linear motion load according to the present invention;

[0027] Figure 8 It is a three-dimensional exploded schematic diagram of a device for measuring a linear motion load according to the present invention.

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

[0029] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented 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 understanding of the disclosure of the present invention more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0031] Embodiment 1:

[0032] See also Figure 1-Figure 8 , the present embodiment provides a device for measuring a linear motion load, comprising 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 application member 7, a reversing operating member 8 and a force counterweight member 9; the first wheel set 2 and the third wheel set 4 are relatively 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 application 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 application member 7 is movably arranged on the frame 1 along the direction of the first wheel set 2 toward the third wheel set 4, the reversing operating member 8 is swingably arranged on the frame 1, the second wheel set 3 is arranged on the 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 1; the first end of the first force transmission member 5 is connected to the first end of the test force application member 7 Then, the second end of the first force transmission member 5 passes through the first wheel group 2, the reversing operating member 8 and the second wheel group 3 in sequence and is connected to the force counterweight member 9; the first end of the second force transmission member 6 is connected to the second end of the test force member 7, and the second end of the second force transmission member 6 bypasses the third wheel group 4 and is connected to the force counterweight member 9; the reversing operating member 8 is swung toward one side so that the first force transmission member 5 is stretched between the test force member 7 and the force counterweight member 9, and under the action of the force counterweight member 9, the test force member 7 is driven by the first force transmission member 5 to move along the third wheel group 4 toward the first wheel group 2; the reversing operating member 8 is swung toward the other side so that the first force transmission member 5 is in a relaxed state between the test force member 7 and the force counterweight member 9, and under the action of the force counterweight member 9, the test force member 7 is driven by the second force transmission member 6 to move along the first wheel group 2 toward the third wheel group 4.

[0033] It should be noted that the locking mechanism 11 needs to be tested for load when it is extended and retracted before leaving the factory. This is 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 temperatures between -40 degrees Celsius and +50 degrees Celsius). The existing load detection devices generally use hydraulic cylinders or air cylinders as load tools, and hydraulic cylinders and air cylinders cannot work normally at such temperatures. Therefore, the existing linear load mechanism cannot perform normal load detection on 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, and the force transmission direction is changed by the cooperation between the first force transmission member 5 and the first wheel group 2 as well as the first force transmission member 5 and the second wheel group 3, so that the gravity of the force counterweight member 9 acts on the test force member 7 along the direction of the third wheel group 4 toward the first wheel group 2, or the force direction is changed by the cooperation between the second force transmission member 6 and the second wheel group 3, so that the gravity of the force counterweight member 9 acts on the test force member 7 along the direction of the first wheel group 2 toward the third wheel group 4; specifically, the first force transmission member 5 acts on the first end of the test force member 7 alone along the direction of the third wheel group 4 toward the first wheel group 2 through the reversing operating member 8, or the second force transmission member 6 acts on the second end of the test force member 7 alone along the direction of the first wheel group 2 toward the third wheel group 4 through the swinging of the reversing operating member 8 relative to the frame 1.

[0035] It can be understood that the locking mechanism 11 is mounted on the frame, and the latch end of the locking mechanism 11 is detachably connected to the test force-applying member 7. In the initial state, the force-applying weight member 9 acts on the locking mechanism 11 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 along the direction of the third wheel set 4 toward the first wheel set 2 (i.e., the direction in which the locking mechanism 11 retracts). During measurement, the latch of the locking mechanism 11 is extended, so that during the process of extending the latch of the locking mechanism 11, the combined force of the gravity of the force-applying counterweight 9 and the friction between the first force transmission member 5 and the first wheel set 2 and the friction between the first force transmission member 5 and the second wheel set 3 acts on the latch, and the direction is opposite to the extension force of the latch and the magnitude is equal. When the latch can be fully extended, it means that the latch can work normally, and the dynamic load of the latch is greater than or equal to the combined force of the gravity of the force-applying counterweight 9 and the friction between the first force transmission member 5 and the first wheel set 2 and the friction between the first force transmission member 5 and the second wheel set 3. When it is necessary to measure the dynamic load of the retracted latch, the reversing operating member 8 is actuated. , so that the force-applying counterweight 9 acts on the locking mechanism 11 through the second force transmission member 6 and the second wheel group 3 along the direction from the first wheel group 2 to the third wheel group 4 (i.e. the direction in which the locking mechanism 11 extends). During measurement, the latch of the locking mechanism 11 is retracted, so that during the retraction of the latch of the locking mechanism 11, the combined force of the gravity of the force-applying counterweight 9 and the friction of the second force transmission member 6 and the second wheel group 3 acting on the latch is opposite to the direction of the retraction force of the latch and is equal in magnitude. When the latch can be fully retracted, it means that the latch can work normally, and the dynamic load of the latch is greater than or equal to the combined force of the gravity of the force-applying counterweight 9 and the friction of the second force transmission member 6 and the second wheel group 3 acting on the latch. With such a structure and arrangement, because the structure does not involve liquid and gas power, the measurement accuracy will not be affected by temperature changes during use, so the motion load of the locking mechanism 11 can be conveniently measured under the premise of meeting environmental requirements.

[0036] It should be noted that in this embodiment, the force-applying counterweight 9 is a weight, and the weight of the weight can be selected according to the size of the actual locking mechanism 11. In some other embodiments of the present application, the force-applying counterweight 9 includes a counterweight plate, and the counterweight plate is provided with weights. The number of weights can be adjusted according to the actual required load, thereby achieving the adjustment of the overall weight of the force-applying counterweight 9.

[0037] Furthermore, the first wheel group 2 includes a first guide wheel 21, which is rotatably connected to the frame body 1; the second wheel group 3 includes a second guide wheel, which is rotatably connected to the frame body 1; the first force transmission member 5 is led out from the test force member 7, and successively bypasses the first guide wheel 21 and the reversing operating member 8, and then is connected to the force counterweight member 9 through the second guide wheel; the third wheel group 4 includes a third guide wheel 41, and the second force transmission member 6 is led out from the test force member 7, and then bypasses the third guide wheel 41 and is connected to the force counterweight member 9; the reversing operating member 8 is arranged between the first guide wheel 21 and the second guide wheel, and the reversing operating member 8 is used to make the force counterweight member 9 act on the test force member 7 through the first force transmission member 5 along the direction of the third wheel group 4 toward the first wheel group 2, or to make the force counterweight member 9 act on the test force member 7 through the second force transmission member 6 along the direction of the first wheel group 2 toward the third wheel group 4.

[0038] It can be known that the force transmission direction of the first force transmission member 5 is changed by the first guide wheel 21 and the second guide wheel, so that the gravity of the force counterweight member 9 in the vertical direction is converted into a force opposite to the extension direction of the locking mechanism 11. In this embodiment, the force counterweight member 9 is arranged horizontally, and the gravity of the force counterweight member 9 changes the direction of the first force transmission member 5 through the first guide wheel 21 and the second guide wheel, so that the vertical downward force is converted into a force in the horizontal direction, and the direction of the force is opposite to the extension direction of the locking mechanism 11, so that the locking mechanism 11 applies a load to the locking mechanism 11 when performing the extension operation. Similarly, the force transmission direction of the second force transmission member 6 is changed by the third guide wheel 41, so that the gravity of the force counterweight member 9 is converted into a force opposite to the retraction direction of the locking mechanism 11, so that the locking mechanism 11 applies a load to the locking mechanism 11 when performing the retraction operation.

[0039] Furthermore, the reversing operating member 8 includes 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, and the second end of the swing frame 81 is connected to 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 that the first force transmission member 5 bypassing the fourth guide wheel 82 is tightened or relaxed. The driving assembly 83 is a telescopic movable rod, the first end of the telescopic movable rod is hinged on the frame body 1, and the second end of the telescopic movable rod is hinged on the swing frame 81. Specifically, the telescopic movable rod is an electric push rod. Of course, in other embodiments, the telescopic movable rod can also be a component or structure that can realize telescopic movement.

[0040] It can be known that, by retracting the electric push rod, the swing frame 81 is pulled by the rod to swing, so that the first force transmission member 5 is tensioned. When the first force transmission member 5 is tensioned, the gravity of the force-applying counterweight member 9 is transmitted to the latch of the locking mechanism 11 through the first force transmission member 5 along the direction of the locking mechanism 11 retraction, at which time the second force transmission member 6 is in a relaxed state and does not work; the electric push rod is extended and pushes the swing frame 81 to swing, so that the first force transmission member 5 is in a relaxed state, at which time the second force transmission member 6 is in a tensioned state, at which time the second force transmission member 6 is in a tensioned state, and the gravity of the force-applying counterweight member 9 is transmitted to the latch of the locking mechanism 11 through the second force transmission member 6 along the direction of the locking mechanism 11 extension. In some other embodiments, the driving assembly 83 can also be other structures or components that can drive the swing frame 81 to swing, such as a motor, etc. The motor is installed on the frame body 1, and the output shaft of the motor is connected to the swing shaft of the swing frame 81, and the swing frame 81 is directly driven by the motor to swing relative to the frame body 1. Guidance is performed through the fourth guide wheel 82. In addition, the fourth guide wheel 82 is rotatably connected to the second end of the swing frame 81 through a bearing to reduce friction during 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 1, and the guide wheel is rotatably connected to the second end of the electric push rod, and the guide wheel is set toward the first force transmission member 5. The first force transmission member 5 is tensioned by extending the electric push rod. When the first force transmission member 5 is retracted, the first force transmission member 5 is in a relaxed state, and the same reversing effect as the above-mentioned reversing operating member 8 can be achieved.

[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 to the first end of the test force member 7, and the second end of the first force transmission member 5 is fixedly connected to the force counterweight member 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 to the second end of the test force member 7, and the second end of the second force transmission rope is fixedly connected to the force counterweight member 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 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 guide wheel 21, the second guide wheel and the third guide wheel 41 guide the first force transmission rope and the second force transmission rope, and the force transmission direction of the first force transmission rope and the second force transmission rope can be easily changed, so that the gravity of the force counterweight 9 can be easily applied to the locking mechanism 11 along the designed direction, and the first force transmission rope is controlled to be tightened or relaxed through the reversing operating member 8, so as to realize the mutual switching of the first patent rope and the second force transmission rope. It should be noted that the first force transmission rope can be a rope such as a wire rope, a nylon rope, etc.

[0044] Furthermore, the test force-applying member 7 includes a linear motion frame 71 and an adapter 72. The linear motion frame 71 is movably arranged on the frame 1 along 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.

[0045] It can be known that the linear motion frame 71 is in the shape of a square frame, and the interior of the linear motion frame 71 has a square cavity area, which is convenient for installing 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 pin of the locking mechanism 11 through a thread, so that the first force transmission member 5 and the second force transmission member 6 can apply tension to the linear motion frame 71 in different directions, thereby realizing the application of a motion load to the locking mechanism.

[0046] Furthermore, the first wheel group 2 also includes a fifth guide wheel 22, which is installed on the frame 1 and arranged between the first guide wheel 21 and the reversing operating member 8. The first force transmission member 5 bypasses the first guide wheel 21, the fifth guide wheel 22 and the reversing operating member 8 in sequence.

[0047] It can be known that the fifth guide wheel 22 is arranged at the lower part of the first guide wheel 21. Through the setting of the fifth guide wheel 22, the position of the first force transmission member 5 is changed, so that the reversing operating member 8 can better tighten and relax the first force transmission, thereby facilitating the operation of the reversing operating member 8.

[0048] Furthermore, the first wheel group 2 also includes a first guard wheel 23, the third wheel group 4 also includes a third guard wheel 42, the reversing operating member 8 includes a fourth guard wheel 84, the first guard wheel 23 and the third guard wheel 42 are installed on the frame body 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; the fourth guard wheel 84 is installed on the swing frame 81, and the fourth guard wheel 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 guard wheel 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 guard wheel 23, thereby preventing the first force transmission rope from being separated from the first guide wheel 21 when the first force transmission rope is in a relaxed state. Of course, the first guard wheel 23 can also be replaced by other structures, such as providing a guide ring, the guide ring is installed on the frame 1, and the first force transmission rope is limited between the guide ring and the first guide wheel 21 by the guide ring, preventing the first force transmission rope from being separated from the first guide wheel 21. Similarly, the third guard wheel 42 and the fourth guard wheel 84 have basically the same structure and function as the first guard wheel 23, and will not be repeated here.

[0050] It is worth noting that the locking mechanism 11 is fixedly connected to the frame 1 in the horizontal direction, the pin in the locking mechanism 11 is extended or retracted in the horizontal direction, and the linear motion frame 71 and the adapter 72 in the test force member 7 are arranged horizontally, so that the gravitational potential energy of the pin and the test force member 7 will not change during the extension or retraction of the pin.

[0051] In addition, the device is also provided with a control box 10, on which are provided an extension button 101, an extension indicator light 102, a retraction button 103, and a retraction indicator light 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 light 102 and the retraction indicator light 104 are used to prompt whether the latch of the locking mechanism 11 is extended or retracted.

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

[0053] The locking mechanism 11 is mounted on the frame 1 , and a force-applying counterweight 9 of corresponding size and specification is selected according to the size of the locking mechanism 11 . In the initial state, the locking mechanism 11 is in a retracted state, the retraction indicator light 104 is on, the first force transmission rope is in a tensioned state under the action of the reversing operating member 8, and the second force transmission rope is in a relaxed state. The weight of the force counterweight 9 acts on the pin on the locking mechanism 11 through the first force 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 (that is, the direction of the third wheel group 4 toward the first wheel group 2); press the extension switch, if the pin of the locking mechanism 11 can be fully extended, it means that the load that the locking mechanism 11 can withstand when it is extended is greater than or equal to the combined force of the gravity of the force counterweight 9 and the friction force exerted on the first force transmission rope. When the locking mechanism 11 is fully extended, the retraction indicator light 104 goes out and the extension indicator light 102 lights up; if the pin of the locking mechanism 11 cannot be extended, it means that the load that the locking mechanism 11 can withstand is less than the combined force of the gravity of the force counterweight 9 and the friction force exerted on the first force transmission rope.

[0054] When it is necessary to measure the motion load during retraction, the reversing operating member 8 is operated, and the driving assembly 83 drives the swing frame 81 to swing, so that the first force transmission rope is in a relaxed state and the second force transmission rope is in a tensioned state. At this time, the weight of the force counterweight 9 acts on the pin of the locking mechanism 11 through the second force transmission rope and the third guide wheel 41 in the direction opposite to the retraction direction of the locking mechanism 11 (that is, the direction of the first wheel group 2 toward the third wheel group 4); press the retraction switch, if the pin of the locking mechanism 11 can be fully retracted, it means that the load that the locking mechanism 11 can withstand when it is retracted is greater than or equal to the combined force of the gravity of the force counterweight 9 and the friction force exerted on the second force transmission rope. When the locking mechanism 11 is fully retracted, the extension indicator light 102 goes out and the retraction indicator light 104 lights up; if the pin of the locking mechanism 11 cannot be retracted, it means that the load that the locking mechanism 11 can withstand when it is retracted is less than the combined force of the gravity of the force counterweight 9 and the friction force exerted on the second force transmission rope.

[0055] It should be noted that the load F of the locking mechanism 11 when extended is 推 and the load F when retracted 拉 It is calculated as follows:

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

[0057] η1=(0.98×0.98) 4 =0.85

[0058]

[0059] Among them: F 推 The thrust provided by the motor of the locking mechanism 11, F f1 is the friction force exerted on the first force transmission rope, m is the weight of the force counterweight 9, and η1 is the transmission efficiency of the first force transmission member 5 (multiplied by the fourth power because the first force transmission rope needs to pass through four sets of guide wheels in sequence).

[0060] During the retraction movement, there is also friction between the third guide wheel 41 and the second force transmission rope, and friction of the corresponding bearing of the third guide wheel 41, and the transmission efficiency is 98% and 98% respectively. The influence of friction needs to be considered in force analysis, and the force situation is as follows:

[0061] η2=0.98×0.98=0.96

[0062]

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

[0064] Embodiment 2:

[0065] Compared with Example 1, the difference between this embodiment and Example 1 is that: in this embodiment, 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 member 7, and the second end of the first force transmission chain is connected to the force counterweight member 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 member 7, and the second end of the second force transmission chain is connected to the force counterweight member 9; the first guide wheel 21, the second guide wheel and the third guide wheel 41 are all sprockets.

[0066] It can be known that the first transmission chain has the same flexible power transmission performance as the first transmission rope, that is, the first transmission chain can also easily change the force transmission direction, and can transmit the gravity of the force-applying counterweight 9 to the latch 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 latch 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 carry heavier weight.

[0067] The remaining details are basically the same as those in Example 1 and will not be described again.

[0068] Embodiment 3:

[0069] The present embodiment provides a method for measuring a linear motion load, using the linear motion load measuring device in Embodiment 1, 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 both in a tensioned state, the force-applying counterweight member 9 is in a stationary state under the tensile force of the first force transmission member and the second force transmission member 6, and at this time, the test force-applying member 7 corresponds to the installation position of the locking mechanism 11 to be tested on the frame 1; the locking mechanism 1 to be tested is placed in a tensioned state. 1 is installed on the frame 1, and the test force-applying member 7 is connected to the latch of the locking mechanism 11; when the reversing operating member 8 swings toward one side, it changes from the initial state to the first working state. At this time, the first force-transmitting member 5 is in a force-transmitting tensioning state. Under the action of the force-applying counterweight 9, the first force-transmitting member 5 and the test force-applying member 7 act on the locking mechanism 11 to be tested along the direction of the third wheel set 4 toward the first wheel set 2; the latch of the locking mechanism 11 is extended. If the latch of the locking mechanism 11 can be fully extended, it means that the locking mechanism 11 can be The load borne is greater than or equal to the combined force of the gravity of the force-applying counterweight 9 and the friction force exerted on the first force transmission member 5. If the latch of the locking mechanism 11 cannot be fully extended, it means that the load that the locking mechanism 11 can withstand is less than the combined force of the gravity of the force-applying counterweight 9 and the friction force exerted on the first force transmission member 5; when the reversing operating member 8 swings toward the other side, it changes from the first working state to the initial state, and continues to swing to the second working state. At this time, the first force transmission member 5 is in a relaxed state, allowing the force-applying counterweight 9 to pass through the second force transmission member 6 and The test force-applying member 7 acts on the pin of the locking mechanism 11 along the direction of the first wheel group 2 toward the third wheel group 4; and retracts the pin of the locking mechanism 11. If the pin of the locking mechanism 11 can be fully retracted, it means that the load that the locking mechanism 11 can withstand is greater than or equal to the combined force of the gravity of the force-applying counterweight 9 and the friction force exerted on the second force transmission member 6. If the pin of the locking mechanism 11 cannot be fully retracted, it means that the load that the locking mechanism 11 can withstand is less than the combined force of the gravity of the force-applying counterweight 9 and the friction force exerted on the second force transmission member 6.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for measuring linear motion load, characterized in that: It 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 application member (7), a reversing operating member (8) and a force application counterweight member (9); The first wheel set (2) and the third wheel set (4) are arranged oppositely at two ends of the frame (1); 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 operating member (8) are both arranged between the first wheel group (2) and the third wheel group (4); the test force-applying member (7) is movably arranged on the frame (1) along the direction from the first wheel group (2) toward the third wheel group (4); the reversing operating member (8) is swingably arranged on the frame (1); the second wheel group (3) is arranged on a side of the reversing operating member (8) away from the first wheel group (2); and the second wheel group (3) is rotatably arranged relative to the frame (1); The first end of the first force transmission member (5) is connected to the first end of the test force application member (7), and the second end of the first force transmission member (5) passes through the first wheel set (2), the reversing operating member (8) and the second wheel set (3) in sequence to be connected to the force application counterweight member (9); The first end of the second force transmission member (6) is connected to the second end of the test force application member (7), and the second end of the second force transmission member (6) bypasses the third wheel set (4) and is connected to the force application counterweight member (9); The reversing operating member (8) is swung toward one side so that the first force transmission member (5) is stretched between the test force member (7) and the force counterweight member (9), and under the action of the force counterweight member (9), the test force member (7) is driven by the first force transmission member (5) to move in the direction from the third wheel group (4) to the first wheel group (2); the reversing operating member (8) is swung toward the other side so that the first force transmission member (5) is in a relaxed state between the test force member (7) and the force counterweight member (9), and under the action of the force counterweight member (9), the test force member (7) is driven by the second force transmission member (6) to move in the direction from the first wheel group (2) to the third wheel group (4).

2. A linear motion load measuring device according to claim 1, characterized in that: The first wheel set (2) comprises a first guide wheel (21), and the first guide wheel (21) is rotatably connected to the frame (1); The second wheel group (3) comprises a second guide wheel, which is rotatably connected to the frame (1); the first force transmission member (5) is led out from the test force application member (7), and passes through the first guide wheel (21) and the reversing operating member (8) in sequence, and then is connected to the force application counterweight member (9) through the second guide wheel; 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 application member (7), and is connected to the force application counterweight member (9) after passing the third guide wheel (41); The reversing operating member (8) is arranged between the first guide wheel (21) and the second guide wheel.

3. A linear motion load measuring device according to claim 2, characterized in that: The reversing operating 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); a first end of the driving assembly (83) is mounted on the frame body (1); and a 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) bypassing the fourth guide wheel (82).

4. A linear motion load measuring device according to claim 3, characterized in that: The driving component (83) is a telescopic movable rod, the first end of which is hinged on the frame body (1), and the second end of which is hinged on the swing frame (81).

5. The linear motion load measuring device according to claim 2, characterized in that: 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 member (5) is connected to the force-applying counterweight member (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 member (9); The first guide wheel (21), the second guide wheel and the third guide wheel (41) are all pulleys.

6. A linear motion load measuring device according to claim 2, characterized in that: 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 member (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 member (9); The first guide wheel (21), the second guide wheel and the third guide wheel (41) are all sprocket wheels.

7. The linear motion load measuring device according to claim 1, characterized in that: 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 (1) along a horizontal direction; one end of the linear motion frame (71) is connected to the first force-transmitting member (5); and the other end of the linear motion frame (71) is connected to the second force-transmitting 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, characterized in that: The first wheel group (2) also includes a fifth guide wheel (22), which is rotatably mounted on the frame (1), and is arranged between the first guide wheel (21) and the reversing operating member (8), and the first force transmission member (5) sequentially bypasses 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, characterized in that: The first wheel group (2) also includes a first guard wheel (23), the third wheel group (4) also includes a third guard wheel (42), the reversing operating member (8) includes a fourth guard wheel (84), 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); 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 for measuring linear motion load, characterized in that: Using the linear motion load measuring device according to any one of claims 1 to 9, 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 both in a tensioned state, the force-applying counterweight member (9) is in a stationary state under the tensile force of the first force transmission member and the second force transmission member (6), and at this time, the test force-applying member (7) corresponds to the installation position of the locking mechanism (11) to be tested on the frame (1); the locking mechanism (11) to be tested is installed on the frame (1), and the test force-applying member (7) is connected to the latch of the locking mechanism (11); When the reversing operating member (8) swings toward one side, it changes from the initial state to the first working state. At this time, the first force transmission member (5) is in a force transmission tension state. Under the action of the force counterweight member (9), the force transmission member (5) and the test force application member (7) act on the locking mechanism (11) to be tested along the direction of the third wheel group (4) toward the first wheel group (2); the latch of the locking mechanism (11) is extended. If the latch of the locking mechanism (11) can be fully extended, it means that the load that the locking mechanism (11) can withstand is greater than or equal to the combined force of the gravity of the force counterweight member (9) and the friction force exerted on the first force transmission member (5). If the latch of the locking mechanism (11) cannot be fully extended, it means that the load that the locking mechanism (11) can withstand is less than the combined force of the gravity of the force counterweight member (9) and the friction force exerted on the first force transmission member (5). When the reversing operating member (8) swings toward 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, so that the force counterweight member (9) acts on the latch of the locking mechanism (11) through the second force transmission member (6) and the test force member (7) along the direction from the first wheel group (2) to the third wheel group (4); and the latch of the locking mechanism (11) is retracted. If the latch of the locking mechanism (11) can be fully retracted, it means that the load that the locking mechanism (11) can withstand is greater than or equal to the combined force of the gravity of the force counterweight member (9) and the friction force exerted on the second force transmission member (6). If the latch of the locking mechanism (11) cannot be fully retracted, it means that the load that the locking mechanism (11) can withstand is less than the combined force of the gravity of the force counterweight member (9) and the friction force exerted on the second force transmission member (6).

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