Device for measuring force benefit of screw pair driving mechanism

Abstract

The invention discloses a force benefit measuring device for a screw pair driving mechanism, and relates to the technical field of measuring devices. Comprising a force measuring mechanism, a screw pair driving mechanism, a torque load applying mechanism and a radial force load applying mechanism, the force measuring mechanism is connected with the screw pair driving mechanism through a force measuring steel wire rope, and the torque load applying mechanism and the radial force load applying mechanism are both fixedly connected with the screw pair driving mechanism; the torque load applying mechanism applies torque load to the screw pair driving mechanism, the radial force load applying mechanism applies radial load to the screw pair driving mechanism, the screw pair driving mechanism applies pulling force to the force measuring mechanism through the force measuring steel wire rope, and the force measuring mechanism measures the pulling force. The torque load and the radial load can be applied to the screw pair driving mechanism, the force benefit of the screw pair driving mechanism in the heat box environment can be measured, and the whole device is easy and convenient to install and operate.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of testing devices, and more particularly relates to a force efficiency measuring device for a screw pair driving mechanism. BACKGROUND

[0002] In order to adapt to different flight environments when performing different tasks, the folding wing of an aircraft needs to be deformed by using a driving mechanism, and the screw pair driving mechanism is a mechanism for driving the deformation of the folding wing. In the transmission process of the screw pair driving mechanism, the ratio of driving force to torque, i.e., the force efficiency of the screw pair, is an important parameter for measuring the power transmission capacity of the mechanism. The existing measuring device can measure the tension force by using common instruments or sensors on the market, and can apply torque load by using a torque instrument, but for force efficiency measurement in a thermal environment, common sensors and instruments are not suitable for measurement and load application in a thermal chamber, and radial force load caused by wing deformation cannot be applied. SUMMARY

[0003] The technical problem to be solved by the application is to provide a force efficiency measuring device for a screw pair driving mechanism, which can apply torque load and radial load to the screw pair driving mechanism and measure the force efficiency of the screw pair driving mechanism in a thermal chamber environment, and the whole device is simple and convenient to install and operate.

[0004] To solve the above technical problems, the technical solution adopted by the application is: a force efficiency measuring device for a screw pair driving mechanism, comprising a force measuring mechanism, a screw pair driving mechanism, a torque load applying mechanism and a radial force load applying mechanism, the force measuring mechanism is connected with the screw pair driving mechanism through a force measuring steel wire rope, the torque load applying mechanism and the radial force load applying mechanism are both fixedly connected with the screw pair driving mechanism, the torque load applying mechanism applies torque load to the screw pair driving mechanism, the radial force load applying mechanism applies radial load to the screw pair driving mechanism, the screw pair driving mechanism applies tension force to the force measuring mechanism through the force measuring steel wire rope, and the force measuring mechanism measures the size of the tension force.

[0005] Preferably, the screw pair driving mechanism comprises a base, a sliding block, a connecting rod, a lead screw sleeve, a lead screw, a sleeve fixing frame, a nut, a thrust bearing frame and a thrust bearing, the sliding block is slidingly connected with the base, one end of the connecting rod is rotationally connected with the sliding block through a first connecting rod pin, the other end is rotationally connected with the end of the lead screw through a second connecting rod pin, the lead screw is sleeved in the lead screw sleeve and slidingly connected with the lead screw sleeve, the lead screw sleeve is fixedly connected with the sleeve fixing frame, the sleeve fixing frame is fixedly connected with the base, the lead screw is screwed with the nut, one end of the nut is rotationally connected with the thrust bearing frame through the thrust bearing, the thrust bearing frame is fixedly connected with the base, the other end of the nut is sleeved in the lead screw sleeve and rotationally connected with the lead screw sleeve, and the nut rotates to drive the lead screw to slide and move in the lead screw sleeve.

[0006] Preferably, the torque load applying mechanism comprises a torque load collar, a first weight wire rope and a second weight wire rope, the torque load collar is in a circular ring structure, the torque load collar is coaxially fixedly sleeved with a connecting nut, the first weight wire rope and the second weight wire rope are symmetrically connected to the outer circular surface of the torque load collar, and the free ends of the first weight wire rope and the second weight wire rope are connected with counterweights.

[0007] Preferably, the torque load applying mechanism further comprises a second pulley, a third pulley, a first pulley support and a second pulley support, the first pulley support and the second pulley support are fixedly connected with the base, the second pulley is rotatably connected with the first pulley support, the third pulley is rotatably connected with the second pulley support, the first weight wire rope passes through the second pulley, and the second weight wire rope passes through the third pulley.

[0008] Preferably, the outer circular surface of the torque load collar is provided with a guide groove, and the first weight wire rope and the second weight wire rope are wound in the guide groove when the torque load collar rotates.

[0009] Preferably, the radial force load applying mechanism comprises a radial load collar and a roller spring plunger, the radial load collar is in a circular ring structure, the radial load collar is coaxially fixedly sleeved with a connecting nut, and the roller spring plunger is fixedly connected with the radial load collar and applies a radial load to the radial load collar and the nut.

[0010] Preferably, the roller spring plunger comprises a fixing member, a sliding member, a spring and a roller, one end of the fixing member is provided with a guide hole, the other end of the fixing member is provided with an external thread, the fixing member is fixedly connected with the outer circle of the radial load collar through the external thread, one end of the spring is fixedly connected with the bottom surface of the guide hole, the other end of the spring is fixedly connected with the sliding member, the sliding member moves in the guide hole, and the roller is rotatably connected with the sliding member.

[0011] Preferably, the radial force load applying mechanism further comprises an arc-shaped track frame, the arc-shaped track frame is fixedly connected with the base, and the roller moves in the track of the arc-shaped track frame.

[0012] Preferably, the force measuring mechanism comprises a linear guide rail, a tension meter fixing frame and a tension meter, the tension meter fixing frame is connected with the linear guide rail, the tension meter is fixedly connected with the tension meter fixing frame, the tension meter is connected with the sliding block through a force measuring wire rope, the force measuring wire rope passes through the first pulley, and the first pulley is rotatably connected with the base.

[0013] The end of the lead screw (10) is provided with a plurality of rectangular sliding rails in the axial direction, and a sliding groove is arranged on the inner wall of the lead screw sleeve (9), and the rectangular sliding rails slide in the sliding groove.

[0014] The beneficial effects generated by the above technical scheme are as follows: 1. The force benefit detection of the screw pair driving mechanism under multiple load working conditions can be realized. 2、The present application is provided with torque load applying mechanism and radial force load applying mechanism, simulating the actual working condition load, the load loading form is more abundant, more practical, makes the measurement effect more real; 3、The present application can use different types of counterweight and spring according to the demand, realize the experimental test under different load size; 4、The present application can adapt to different type driving mechanism, design different support, satisfy test condition and carry out experimental test; 5、The present application can put the main experimental component into the high temperature box for testing, then lead out through the force measuring steel wire rope, place the force measuring mechanism outside the high temperature box, utilize the steel wire rope, counterweight and roller spring plunger to exert torque and radial force on the nut, finally realize the measurement of force benefit under the simulation of overall mechanism thermal deformation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic diagram of measuring device; Figure 2 It is the connecting structure schematic diagram of slider and base; Figure 3 It is the local section schematic diagram of screw pair driving mechanism; Figure 4 It is the connecting structure schematic diagram of torque load applying mechanism; Figure 5 It is the connecting structure schematic diagram of radial force load applying mechanism; Figure 6 It is the installation schematic diagram of radial load collar and torque load collar; Figure 7 It is the screw structure schematic diagram; Figure 8 It is the screw sleeve structure schematic diagram; In the drawing: 1, base; 2, slider; 3, connecting rod; 4-1, first pulley; 4-2, second pulley; 4-3, third pulley; 5, force measuring steel wire rope; 6, tension meter; 7, tension meter fixing frame; 8, linear guide rail; 9, screw sleeve; 10, screw; 11, sleeve fixing frame; 12, nut; 13, thrust bearing frame; 14-1, first connecting rod pin; 14-2, second connecting rod pin; 15, hanging rope pin; 16-1, first rib plate; 16-2, second rib plate; 17, radial load collar; 18, torque load collar; 19, thrust bearing; 20-1, first jack screw; 20-2, second jack screw; 20-3, third jack screw; 20-4, fourth jack screw; 21, first pulley support; 22-1, first counterweight steel wire rope; 22-2, second counterweight steel wire rope; 23, second pulley support; 24, roller spring plunger; 25, arc track frame. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0017] As shown in Figure 1 , the helical pair driving mechanism force benefit measuring device comprises a force measuring mechanism, a helical pair driving mechanism, a torque load applying mechanism and a radial force load applying mechanism.

[0018] As shown in Figures 2-3 , the helical pair driving mechanism comprises a base 1, a sliding block 2, a connecting rod 3, a lead screw sleeve 9, a lead screw 10, a sleeve fixing frame 11, a nut 12, a thrust bearing frame 13 and a thrust bearing 19. The base 1 is provided with a sliding groove, and the sliding block 2 slides in the sliding groove. As shown in Figure 2 , one end of the connecting rod 3 is rotatably connected to the top of the sliding block 2 through a first connecting rod pin 14-1, and the other end is rotatably connected to the end of the lead screw 10 through a second connecting rod pin 14-2. The lead screw 10 is sleeved in the lead screw sleeve 9. As shown in Figure 7 , the end of the lead screw 10 is provided with four rectangular sliding rails in the axial direction. As shown in Figure 8 , the inner wall of the lead screw sleeve 9 is provided with a sliding groove, and the rectangular sliding rails slide in the sliding groove. The lead screw sleeve 9 is fixedly connected to the sleeve fixing frame 11 through bolts. The sleeve fixing frame 11 is fixedly connected to the base 1. The lead screw sleeve 9 is a stepped hole, one end of the nut 12 is rotatably connected to the thrust bearing frame 13 through the thrust bearing 19, and the other end is abutted on the stepped surface of the stepped hole of the lead screw sleeve 9, so that the nut 12 is axially positioned. The thrust bearing frame 13 is fixedly connected to the base 1. The lead screw 9 is screwed with the nut 12, and the nut 12 rotates to drive the lead screw 10 to slide in the lead screw sleeve 9.

[0019] As shown in Figure 4 , the torque load applying mechanism comprises a torque load sleeve ring 18, a first heavy steel wire rope 22-1, a second heavy steel wire rope 22-2, a second pulley 4-2, a third pulley 4-3, a first pulley support 21 and a second pulley support 23. As shown in Figure 6As shown, the torque load sleeve 18 is a circular structure, and the outer circular surface is provided with a guide groove. The torque load sleeve 18 is connected with the nut 12 through the coaxial fixed sleeve, and is fixedly connected with the nut 12 through the first jack screw 20-1 and the fourth jack screw 20-4. The first pulley support 21 and the second pulley support 23 are fixedly connected with the base 1. The second pulley 4-2 is rotatably connected with the first pulley support 21, and the third pulley 4-3 is rotatably connected with the second pulley support 23. The first hanging weight steel wire rope 22-1 and the second hanging weight steel wire rope 22-2 are symmetrically connected to the outer circular surface of the torque load sleeve 18. The first hanging weight steel wire rope 22-1 is connected with a counterweight after passing through the second pulley 4-2, and the second hanging weight steel wire rope 22-2 is connected with a counterweight after passing through the third pulley 4-3. The weight of the counterweight determines the size of the torque applied to the nut 12. When the torque load sleeve 18 rotates, the first hanging weight steel wire rope 22-1 and the second hanging weight steel wire rope 22-2 are wound in the guide groove, ensuring that the direction of the tension of the hanging weight steel wire rope 22 relative to the axial radius of the nut 12 remains unchanged during the rotation of the nut 12, and ensuring that the moment is constant.

[0020] It should be noted here that the hanging weight steel wire rope is hinged with the torque load sleeve 18, and when the nut 12 rotates, the hinge will not interfere with the steel wire rope. The first hanging weight steel wire rope 22-1 cooperates with the second pulley 4-2 and the first pulley support 21 to change the direction of the tension of the counterweight, and similarly, the second hanging weight steel wire rope 22-2, the third pulley 4-3 and the second pulley support 23 are used in cooperation, and the two pulley combinations generate a constant couple load relative to the nut 12. When the nut 12 rotates, part of the hanging weight steel wire rope 22 is wound on the nut 12, and the counterweight stably provides a constant torque load for the nut 12.

[0021] As shown in Figure 5 The radial force load applying mechanism includes a radial load sleeve 17, a roller spring plunger 24, and an arc-shaped track frame 25. The radial load sleeve 17 is a circular structure, and the radial load sleeve 17 is coaxially fixedly connected with the nut 12 through the second jack screw 20-2 and the third jack screw 20-3. The roller spring plunger 24 includes a fixed part, a sliding part, a spring, and a roller. The fixed part is provided with a guide hole at one end and an external thread at the other end. The outer circle of the radial load sleeve 17 is provided with an internal thread, and the fixed part is fixedly connected with the radial load sleeve 17 through the external thread. One end of the spring is fixedly connected with the bottom surface of the guide hole, and the other end is fixedly connected with the sliding part. The sliding part moves in the guide hole, and the roller is rotatably connected with the sliding part. The arc-shaped track frame 25 is fixedly connected with the base 1, and the roller moves in the track of the arc-shaped track frame 25 when the nut 12 rotates.

[0022] The force measuring mechanism comprises a linear guide rail 8, a tension meter fixing frame 7, a tension meter 6, the tension meter fixing frame 7 is connected with the linear guide rail 8, the tension meter 6 is fixedly connected with the tension meter fixing frame 7, and the tension meter fixing frame 7 is slidably connected with the linear guide rail 8. The tension meter 6 is connected with the sliding block 2 through a force measuring steel wire rope 5, and the force measuring steel wire rope 5 passes through a first pulley 4-1 which is rotatably connected with the base 1.

[0023] When the overall testing device is in a state of being measured, the sliding block 2 is close to the right end surface of the sliding groove of the base 1, the tension meter 6 on the linear guide rail 8 is in the most edge position, only the front end screw pair of the lead screw 10 is in contact with the nut 12, the spring in the roller spring plunger 24 is in a compressed state to provide a radial force relative to the nut 12, the first hanging weight steel wire rope 22-1 and the second hanging weight steel wire rope 22-2 pull the counterweight to make the load at the most lower end to wait for contraction and provide a torque.

[0024] The linear guide rail 8 drives the tension meter 6 and the tension meter fixing frame 7, the tension meter 6 moves from one end of the linear guide rail 8 to the other end, drives the force measuring steel wire rope 5 to pull the sliding block 2, the sliding block 2 pushes the connecting rod 3 to move, the connecting rod 3 pushes the lead screw 10 to make the lead screw 10 move at a constant speed in a straight line, and the lead screw 10 drives the nut 12 to rotate. At this time, the roller in the roller spring plunger 24 rolls on the arc-shaped track frame 25 to provide a constant radial force relative to the nut 12. The first hanging weight steel wire rope 22-1 and the second hanging weight steel wire rope 22-2 are wound in the guide groove of the torque load sleeve ring 18, pull the configuration block to slowly move upwards, and provide a constant couple load for the nut 12. In this process, the tension meter 6 displays the driving force required at different moments to realize the measurement of the driving force size in the driving process. Until the end surface of the lead screw 10 is in contact with the nut 12, the driving is completed, and the measurement test is ended. The linear guide rail 8 is provided with a lead screw, the lead screw is rotatably connected with the tension meter fixing frame 7, a motor or a hydraulic motor and the like driving device drives the lead screw to rotate, and the lead screw can drive the tension meter fixing frame 7 to move along the slide rail on the linear guide rail 8.

[0025] When it is needed to measure the force efficiency of the driving mechanism in a high-temperature environment, the whole measuring device can be placed in a high-temperature box, only the force measuring mechanism is placed outside the high-temperature box, the force measuring steel wire rope 5 is stretched out of the high-temperature box and connected with the tension meter 6, after heating and heat preservation of the high-temperature box are completed, the linear guide rail 8 is driven to pull the tension meter 6, the sliding block 2 is driven to move forward to realize the above operation, and the force efficiency measurement under the given torque load and the radial force load is realized.

[0026] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A force efficiency measuring device for a helical pair drive mechanism, characterized in that, It includes a force measuring mechanism, a helical pair drive mechanism, a torque load applying mechanism, and a radial force load applying mechanism. The force measuring mechanism is connected to the helical pair drive mechanism via a force measuring wire rope (5). The torque load applying mechanism and the radial force load applying mechanism are both fixedly connected to the helical pair drive mechanism. The torque load applying mechanism applies a torque load to the helical pair drive mechanism, and the radial force load applying mechanism applies a radial load to the helical pair drive mechanism. The helical pair drive mechanism applies a tension to the force measuring mechanism via the force measuring wire rope (5), and the force measuring mechanism measures the magnitude of the tension.

2. The force efficiency measuring device for a helical pair drive mechanism according to claim 1, characterized in that, The helical drive mechanism includes a base (1), a slider (2), a connecting rod (3), a screw sleeve (9), a screw (10), a sleeve fixing bracket (11), a nut (12), a thrust bearing bracket (13), and a thrust bearing (19). The slider (2) is slidably connected to the base (1). One end of the connecting rod (3) is rotatably connected to the slider (2) via a first connecting rod pin (14-1), and the other end is rotatably connected to the end of the screw (10) via a second connecting rod pin (14-2). The screw (10) is sleeved inside the screw sleeve (9) and... The ball screw sleeve (9) is slidably connected to the ball screw sleeve (9), the ball screw sleeve (9) is fixedly connected to the ball screw sleeve bracket (11), the ball screw bracket (11) is fixedly connected to the base (1), the ball screw (9) is screwed to the nut (12), one end of the nut (12) is rotatably connected to the thrust bearing bracket (13) through the thrust bearing (19), the thrust bearing bracket (13) is fixedly connected to the base (1), and the other end is sleeved in the ball screw sleeve (9) and rotatably connected to the ball screw sleeve (9). When the nut (12) rotates, it drives the ball screw (10) to slide and move in the ball screw sleeve (9).

3. The force efficiency measuring device for a helical pair drive mechanism according to claim 2, characterized in that, The torque load application mechanism includes a torque load collar (18), a first hanging weight steel wire rope (22-1), and a second hanging weight steel wire rope (22-2). The torque load collar (18) is a circular ring structure. A connecting nut (12) is coaxially fixedly sleeved on the torque load collar (18). The first hanging weight steel wire rope (22-1) and the second hanging weight steel wire rope (22-2) are symmetrically connected on the outer circular surface of the torque load collar (18). The free ends of the first hanging weight steel wire rope (22-1) and the second hanging weight steel wire rope (22-2) are both connected to counterweights.

4. The force efficiency measuring device for a helical pair drive mechanism according to claim 3, characterized in that, The torque load application mechanism also includes a second pulley (4-2), a third pulley (4-3), a first pulley bracket (21), and a second pulley bracket (23). The first pulley bracket (21) and the second pulley bracket (23) are both fixedly connected to the base (1). The second pulley (4-2) is rotatably connected to the first pulley bracket (21), and the third pulley (4-3) is rotatably connected to the second pulley bracket (23). The first hanging weight wire rope (22-1) passes through the second pulley (4-2), and the second hanging weight wire rope (22-2) passes through the third pulley (4-3).

5. The force efficiency measuring device for a helical pair drive mechanism according to claim 3, characterized in that, The outer circular surface of the torque load collar (18) is provided with a guide groove. When the torque load collar (18) rotates, the first load steel wire rope (22-1) and the second load steel wire rope (22-2) are both wound in the guide groove.

6. The force efficiency measuring device for a helical pair drive mechanism according to claim 2, characterized in that, The radial force load application mechanism includes a radial load collar (17) and a roller spring plunger (24). The radial load collar (17) is a circular ring structure. The radial load collar (17) is coaxially fixedly sleeved with a connecting nut (12). The roller spring plunger (24) is fixedly connected to the radial load collar (17) and applies radial load to the radial load collar (17) and the nut (12).

7. The force efficiency measuring device for a helical pair drive mechanism according to claim 6, characterized in that, The roller spring plunger (24) includes a fixed part, a sliding part, a spring, and a roller. One end of the fixed part is provided with a guide hole, and the other end is provided with an external thread. The fixed part is fixedly connected to the outer circle of the radial load collar (17) through the external thread. One end of the spring is fixedly connected to the bottom surface of the guide hole, and the other end is fixedly connected to the sliding part. The sliding part slides and moves in the guide hole, and the roller rotates and connects to the sliding part.

8. The force efficiency measuring device for a helical pair drive mechanism according to claim 7, characterized in that, The radial force load application mechanism also includes an arc-shaped track frame (25), which is fixedly connected to the base (1), and the rollers roll within the track of the arc-shaped track frame (25).

9. The force efficiency measuring device for a helical pair drive mechanism according to claim 2, characterized in that, The force measuring mechanism includes a linear guide rail (8), a tension meter mounting frame (7), and a tension meter (6). The tension meter mounting frame (7) is connected to the linear guide rail (8), and the tension meter (6) is fixedly connected to the tension meter mounting frame (7). The tension meter is connected to the slider (2) through a force measuring wire rope (5). The force measuring wire rope (5) passes through the first pulley (4-1), and the first pulley (4-1) is rotatably connected to the base (1).

10. A force efficiency measuring device for a helical pair drive mechanism according to claim 2, characterized in that, The end of the lead screw (10) is provided with several rectangular slide rails along the axial direction, and a slide groove is provided on the inner wall of the lead screw sleeve (9), and the rectangular slide rails slide within the slide groove.

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