Foot arch load motion state diagnosis and evaluation device

Abstract

The invention provides a foot arch load motion state diagnosis and evaluation device, which relates to the technical field of motion ability diagnosis and comprises a motion swing rod, a motion pedal and a piston air pump. By means of the pneumatic contacts densely arranged on the foot pedal and the built-in displacement sensors, displacement change data of the foot arch part during movement can be collected in real time, array type pressure distribution monitoring is formed, a high-precision and multi-dimensional quantitative evaluation basis is provided for lower limb movement function identification, and the accuracy and accuracy of lower limb movement function identification are improved. The problems that a traditional evaluation means is high in subjectivity and single in data are solved, through linkage of a winding wheel at the tail end of a second rotating shaft and a weight stack in a weight box, the weight stack can be automatically lifted to increase motion resistance when an eccentric driving mechanism rotates in the single direction, stepless adjustment of motion loads is achieved, and the reliability of evaluation is improved. Rehabilitation training or function evaluation requirements of different patients are met, and the application range of the equipment is widened.

Description

Technical Field

[0001] The present invention relates to the technical field of medical diagnosis, and particularly to a device for diagnosing and evaluating the movement state of arch load. Background Art

[0002] The identification and evaluation of lower limb motor function gradually emerged with the cross-development of medicine, engineering, and information technology. Its core goal is to objectively and accurately quantify the human lower limb motor ability through technical means to meet the needs in the fields of clinical diagnosis, rehabilitation treatment, sports training, etc.

[0003] Traditional evaluation of lower limb motor function mainly relies on the subjective observation of clinicians and simple instruments. The evaluation results depend on the experience of doctors and are easily affected by subjective factors. Moreover, traditional switch-type sensors can only detect the contact or non-contact state, cannot capture the continuity of pressure changes, and cannot monitor the changes in arch depth in real time under different load movement states. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for diagnosing and evaluating the movement state of arch load to solve the problem that the traditional switch-type sensor can only detect the contact or non-contact state and cannot capture the continuity of pressure changes proposed in the above background.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is a device for diagnosing and evaluating the movement state of arch load, including: a movement bracket, on which two movement swing rods are rotatably connected. A movement pedal is fixedly connected to the bottom of the movement swing rod. A first shaft sleeve is fixedly connected to the upper end of the movement swing rod. A second shaft sleeve is fixedly connected to the movement bracket. An eccentric drive mechanism is arranged between the first shaft sleeve and the second shaft sleeve. The eccentric drive mechanism includes a first eccentric wheel and a second eccentric wheel. An eccentric rod is fixedly connected between the first eccentric wheel and the second eccentric wheel. A first ratchet disc is arranged between the first eccentric wheel and the first shaft sleeve. The first ratchet disc and the first eccentric wheel are mutually engaged through a first ratchet tooth and a third ratchet tooth to achieve one-way transmission. A first spring is arranged between the first ratchet disc and the first shaft sleeve. The first ratchet disc is always kept engaged with the first eccentric wheel through the spring force; a second ratchet disc is arranged between the second eccentric wheel and the second shaft sleeve. The second ratchet disc and the second eccentric wheel are mutually engaged through a second ratchet tooth and a fourth ratchet tooth to achieve one-way transmission. A second spring is arranged between the second ratchet disc and the second shaft sleeve. The second ratchet disc is always kept engaged with the second eccentric wheel through the spring force; The eccentric rod is rotationally connected with an eccentric connecting rod, and the lower end of the eccentric connecting rod is drivingly connected with a piston air pump. The circular motion of the eccentric rod drives the eccentric connecting rod to swing reciprocally, converting the swing of the moving swing rod into the linear motion of the piston of the piston air pump. The upper end of the moving swing rod is provided with a first air inlet, and the lower end of the moving swing rod is communicated with the moving pedal through a cavity to form a gas transmission channel. A sole pedal is fixedly connected to the moving pedal, and airtight telescopic grooves are densely arranged on the sole pedal. An air-driven contact is slidably connected in the airtight telescopic groove, and a displacement sensor is arranged in the air-driven contact for real-time collecting the pressure displacement data of the air-driven contact when the arch of the foot moves.

[0006] Further, a first rotating shaft is fixedly connected to the outside of the first eccentric wheel. The first rotating shaft penetrates through the first shaft sleeve and the first ratchet disc, and the first rotating shaft is rotationally connected with the first shaft sleeve and the first ratchet disc, so that the first eccentric wheel and the first ratchet disc rotate coaxially and can slide axially relative to each other; a second rotating shaft is fixedly connected to the outside of the second eccentric wheel. The second rotating shaft penetrates through the second shaft sleeve and the second ratchet disc, and the second rotating shaft is rotationally connected with the second shaft sleeve and the second ratchet disc, so that the second eccentric wheel and the second ratchet disc rotate coaxially and can slide axially relative to each other.

[0007] Further, first ratchet teeth are machined on the outside of the first eccentric wheel, and third ratchet teeth are machined on the inside of the first ratchet disc. The first ratchet teeth and the third ratchet teeth are engaged with each other to transmit a unidirectional driving force through tooth-shaped cooperation; second ratchet teeth are machined on the outside of the second eccentric wheel, and fourth ratchet teeth are machined on the inside of the second ratchet disc. The second ratchet teeth and the fourth ratchet teeth are engaged with each other to transmit a unidirectional driving force through tooth-shaped cooperation.

[0008] Further, the tooth spaces of the first ratchet teeth and the second ratchet teeth face the same direction, and the tooth spaces of the third ratchet teeth and the fourth ratchet teeth face the same direction, ensuring that when the moving swing rod swings reciprocally, the first ratchet disc and the second ratchet disc only drive the eccentric drive mechanism to rotate in a single direction, avoiding reverse idling.

[0009] Further, a limit slider is fixedly connected to the first ratchet disc. The first ratchet disc is slidably connected with the moving swing rod through the limit slider, restricting the circumferential rotation of the first ratchet disc so that it can only slide axially along the first rotating shaft to realize meshing or disengaging with the first eccentric wheel.

[0010] Further, a stepped shaft is fixedly connected to the outside of the second ratchet disc. One end of the stepped shaft is inserted into the second shaft sleeve, and the second spring is also located in the second shaft sleeve. And a limit strip is fixedly connected to the outside of the stepped shaft. The stepped shaft is slidably connected with the second shaft sleeve through the limit strip, ensuring the stability of the axial sliding of the second ratchet disc through the limit structure, and at the same time, the second spring provides a restoring force to maintain normal meshing.

[0011] Further, the piston air pump includes a piston cylinder located inside the moving swing rod and fixedly connected to the moving swing rod. A driving piston is arranged inside the piston cylinder. A piston rod is fixedly connected above the driving piston, and the upper end of the piston rod is rotatably connected to the eccentric connecting rod. The driving piston is driven to move up and down by the eccentric connecting rod. A first one-way valve is arranged on the driving piston to control the one-way entry of gas into the cavity below the piston. A second one-way valve is arranged at the bottom of the piston cylinder to control the one-way output of gas to the cavity of the moving pedal. A second air inlet is opened at the top end of the piston cylinder to inhale external air to supplement the air source.

[0012] Further, a constant pressure valve is arranged at the bottom of the moving swing rod. When the air pressure in the cavity of the moving pedal exceeds the set value, the constant pressure valve automatically opens to release the excess pressure, keeping the pressure in the cavity constant and ensuring the accuracy of the measurement data of the displacement sensor.

[0013] Further, a counterweight box is arranged on each side of the moving bracket. More than two groups of counterweight plates are stacked in the counterweight box, and adjacent counterweight plates are fixedly connected by a connecting cable to prevent the counterweight plates from scattering during the lifting process. A winding wheel is fixedly connected to the end of the second rotating shaft. A steel wire rope is wound on the winding wheel, and the lower end of the steel wire rope is fixedly connected to the uppermost counterweight plate. When the eccentric driving mechanism rotates unidirectionally, the steel wire rope is wound by the winding wheel driven by the second rotating shaft, thereby lifting the counterweight plate to increase the movement resistance.

[0014] Further, a first pushing connecting rod is rotatably connected to the first ratchet disc through a rotating shaft, and a second pushing connecting rod is rotatably connected to the second ratchet disc through a rotating shaft. The first pushing connecting rod and the second pushing connecting rod are jointly rotatably connected to a lifting and pressure regulating rod. The lifting and pressure regulating rod penetrates the moving swing rod. A reset button is fixedly connected to the upper end of the lifting and pressure regulating rod. When the reset button is pressed, the lifting and pressure regulating rod drives the first pushing connecting rod and the second pushing connecting rod to act synchronously, pushing the first ratchet disc and the second ratchet disc to move axially, so that their ratchet teeth are disengaged from the first eccentric wheel and the second eccentric wheel.

[0015] Compared with the prior art, the beneficial effects of the present invention include: 1. A plantar arch load movement state diagnosis and evaluation device proposed by the present invention can collect the displacement change data of the plantar arch during movement in real time through the pneumatic contacts densely arranged on the sole pedal and the built-in displacement sensor, forming an array pressure distribution monitoring, providing a high-precision and multi-dimensional quantitative evaluation basis for the identification of lower limb movement functions, and solving the problems of strong subjectivity and single data of traditional evaluation means.

[0016] 2. The arch load motion state diagnosis and evaluation device proposed by the present invention is linked by a winding wheel at the end of the second rotating shaft and a counterweight piece in the counterweight box. When the eccentric drive mechanism rotates unidirectionally, the counterweight piece can be automatically lifted to increase the motion resistance, realizing stepless adjustment of the motion load, meeting the rehabilitation training or functional evaluation needs of different patients, and expanding the applicable range of the device.

[0017] 3. The arch load motion state diagnosis and evaluation device proposed by the present invention. The reset button drives the first ratchet disc and the second ratchet disc to disengage from the eccentric wheel through the first push link and the second push link, causing the counterweight piece to fall under the action of gravity. At the same time, the damping characteristic of the piston air pump is used to slow down the falling speed, avoiding potential safety hazards caused by the collision of the counterweight piece, and ensuring the smoothness and safety of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the protection scope of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 Schematically shows the external structure diagram of an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention; Figure 2 Schematically shows the front view structure diagram of an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention; Figure 3 Schematically shows an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention Figure 2 The enlarged structure diagram at position A; Figure 4 Schematically shows an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention Figure 3 The enlarged sectional view structure diagram at position B; Figure 5 Schematically shows the exploded view of the transmission mechanism of an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention; Figure 6 Schematically shows the sectional view structure diagram of the piston air pump of an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention; Figure 7 Schematically shows the structure diagram of the counterweight piece of an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention; Figure 8 Schematically shows the structure diagram of the pneumatic contact of an arch load motion state diagnosis and evaluation device proposed according to an embodiment of the present invention.

[0019] Reference numerals in the figure: 1, motion support; 2, motion swing rod; 3, motion pedal; 4, first bushing; 5, second bushing; 6, eccentric drive mechanism; 601, first eccentric wheel; 602, second eccentric wheel; 603, eccentric rod; 604, first rotating shaft; 605, second rotating shaft; 606, first ratchet tooth; 607, second ratchet tooth; 7, first ratchet disc; 701, third ratchet tooth; 702, limit slider; 8, first spring; 9, second ratchet disc; 901, fourth ratchet tooth; 902, stepped shaft; 903, limit strip; 10, second spring; 11, eccentric connecting rod; 12, piston air pump; 1201, piston cylinder; 1202, driving piston; 1203, piston rod; 1204, first one-way valve; 1205, second one-way valve; 1206, second air inlet; 13, first air inlet; 14, sole pedal; 15, airtight telescopic groove; 16, pneumatic contact; 17, constant pressure valve; 18, counterweight box; 19, counterweight plate; 20, connecting cable; 21, winding wheel; 22, steel wire rope; 23, first push connecting rod; 24, second push connecting rod; 25, lifting and pressing rod; 26, reset button. Detailed implementation manners

[0020] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, those of ordinary skill in the art can propose various structural forms and implementation manners that can be mutually replaced. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction on the technical solution of the present invention.

[0021] Embodiment 1: Combined with the embodiment mode of the present invention Figure 1-8 As shown. An arch load motion state diagnosis and evaluation device includes: a motion support 1, two motion swing rods 2 are rotatably connected to the motion support 1, a motion pedal 3 is fixedly connected to the bottom of the motion swing rod 2, a first bushing 4 is fixedly connected to the upper end of the motion swing rod 2, a second bushing 5 is fixedly connected to the motion support 1, an eccentric drive mechanism 6 is arranged between the first bushing 4 and the second bushing 5, the eccentric drive mechanism 6 includes a first eccentric wheel 601 and a second eccentric wheel 602, and an eccentric rod 603 is fixedly connected between the first eccentric wheel 601 and the second eccentric wheel 602.

[0022] A first rotating shaft 604 is fixedly connected to the outer side of a first eccentric wheel 601. The first rotating shaft 604 passes through a first shaft sleeve 4 and a first ratchet disc 7, and the first rotating shaft 604 is rotatably connected to the first shaft sleeve 4 and the first ratchet disc 7. A first ratchet tooth 606 is machined on the outer side of the first eccentric wheel 601, and a third ratchet tooth 701 is machined on the inner side of the first ratchet disc 7. The first ratchet tooth 606 and the third ratchet tooth 701 are mutually engaged to achieve one-way transmission. A limit slider 702 is fixedly connected to the first ratchet disc 7 and is slidably connected to a motion swing rod 2 through the limit slider 702. A first spring 8 is arranged between the first ratchet disc 7 and the first shaft sleeve 4 to provide a reset elastic force to ensure engagement.

[0023] A second rotating shaft 605 is fixedly connected to the outer side of a second eccentric wheel 602. The second rotating shaft 605 passes through a second shaft sleeve 5 and a second ratchet disc 9, and the second rotating shaft 605 is rotatably connected to the second shaft sleeve 5 and the second ratchet disc 9. A second ratchet tooth 607 is machined on the outer side of the second eccentric wheel 602, and a fourth ratchet tooth 901 is machined on the inner side of the second ratchet disc 9. The second ratchet tooth 607 and the fourth ratchet tooth 901 are mutually engaged to achieve one-way transmission, and the tooth spaces of the first ratchet tooth 606 and the second ratchet tooth 607 face the same direction, and the tooth spaces of the third ratchet tooth 701 and the fourth ratchet tooth 901 face the same direction to ensure one-way drive. A stepped shaft 902 is fixedly connected to the outer side of the second ratchet disc 9. One end of the stepped shaft 902 is inserted into the second shaft sleeve 5. A second spring 10 is located in the second shaft sleeve 5, and a limit strip 903 is fixedly connected to the outer side of the stepped shaft 902 and is slidably connected to the second shaft sleeve 5 through the limit strip 903 to ensure axial stability.

[0024] An eccentric rod 603 is rotatably connected to an eccentric connecting rod 11. The lower end of the eccentric connecting rod 11 is drivingly connected to a piston air pump 12. The piston air pump 12 includes a piston cylinder 1201. The piston cylinder 1201 is located inside a motion swing rod 2 and is fixedly connected to the motion swing rod 2. A driving piston 1202 is arranged in the piston cylinder 1201. A piston rod 1203 is fixedly connected above the driving piston 1202. The upper end of the piston rod 1203 is rotatably connected to the eccentric connecting rod 11. A first one-way valve 1204 is arranged on the driving piston 1202, a second one-way valve 1205 is arranged at the bottom of the piston cylinder 1201, and a second air inlet 1206 is opened at the top end of the piston cylinder 1201 to achieve one-way pressurized gas transmission.

[0025] A first air inlet 13 is opened at the upper end of the motion swing rod 2. The lower end of the motion swing rod 2 is communicated with a motion pedal 3 through a cavity. A foot pedal 14 is fixedly connected to the motion pedal 3. A plurality of airtight telescopic grooves 15 are densely opened on the foot pedal 14. A pneumatic contact 16 is slidably connected in the airtight telescopic grooves 15. A displacement sensor is arranged in the pneumatic contact 16 to monitor the arch displacement in real time. A constant pressure valve 17 is arranged at the bottom of the motion swing rod 2 to release excess pressure and keep the pressure constant.

[0026] On both sides of the exercise bracket 1, there is a counterweight box 18 respectively. More than two groups of counterweight plates 19 are stacked in the counterweight box 18. Adjacent counterweight plates 19 are fixedly connected by a connecting cable 20. The end of the second rotating shaft 605 is fixedly connected with a winding wheel 21. The winding wheel 21 winds a steel wire rope 22. The lower end of the steel wire rope 22 is fixedly connected with the uppermost counterweight plate 19 to realize the adjustment of the exercise load.

[0027] A first push link 23 is rotatably connected to the first ratchet disc 7 through a rotating shaft. A second push link 24 is rotatably connected to the second ratchet disc 9 through a rotating shaft. The first push link 23 and the second push link 24 are jointly rotatably connected to a lifting and pressing rod 25. The lifting and pressing rod 25 penetrates through the exercise swing rod 2 and its upper end is fixedly connected with a reset button 26, which is used to control the meshing state of the ratchet disc and the eccentric wheel to realize the counterweight reset.

[0028] Embodiment 2: The eccentric drive mechanism 6 drives the winding wheel 21 to wind the steel wire rope 22 through the second rotating shaft 605, and successively lifts the counterweight plate 19 to increase the exercise resistance; when the reset button 26 is pressed, the lifting and pressing rod 25 pushes the first ratchet disc 7 and the second ratchet disc 9 to disengage from the eccentric wheel through the first push link 23 and the second push link 24. The counterweight plate 19 falls under the action of gravity, and the damping effect of the piston air pump 12 slows down the falling speed to avoid collision and ensure the safe and stable operation of the equipment.

[0029] Working principle: First, let the patient stand on the two groups of exercise pedals 3 with both feet respectively, hold the exercise bracket 1 with hands, and drive the exercise swing rod 2 to swing back and forth around the exercise bracket 1 through lower limb movement. During the swinging process, the first ratchet disc 7 and the second ratchet disc 9 utilize the one-way transmission characteristics of the ratchet teeth, the one-way meshing of the first ratchet teeth 606 and the third ratchet teeth 701, and the second ratchet teeth 607 and the fourth ratchet teeth 901 to drive the eccentric drive mechanism 6 to rotate in one direction; when the eccentric drive mechanism 6 rotates, it drives the piston air pump 12 to work through the eccentric rod 603 and the eccentric connecting rod 11. The piston air pump 12 inhales air through the second air inlet 1206, and after being pressurized by the first one-way valve 1204 and the second one-way valve 1205, it pumps air into the cavity of the exercise pedal 3 through the first air inlet 13, pushes the pneumatic contact 16 out of the airtight telescopic groove 15, and the constant pressure valve 17 adjusts the air pressure in the cavity in real time to keep the pressure constant; when the patient's foot moves, the arch of the foot applies pressure to the pneumatic contact 16 to make it retract, and the displacement sensor monitors the displacement change of the pneumatic contact 16 in real time, so as to obtain the movement state data of the arch of the foot.

[0030] Meanwhile, the eccentric drive mechanism 6 rotates unidirectionally to drive the wire reel 21 to wind the wire rope 22 through the second rotating shaft 605, successively lifting the counterweight pieces 19 in the counterweight box 18 to increase the load by increasing the movement resistance; when reset is needed, press the reset button 26, and the first ratchet disc 7 and the second ratchet disc 9 are pushed by the first push link 23 and the second push link 24 to disengage from the eccentric drive mechanism 6. The counterweight pieces 19 fall under the action of gravity. During the falling process, the wire rope 22 drives the wire reel 21 to rotate, driving the piston air pump 12 to pump air continuously, and using the damping effect of the piston air pump 12 to slow down the falling speed of the counterweight pieces 19 to avoid collision and ensure the safe and stable operation of the equipment.

[0031] The technical scope of the present invention is not limited to the content described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A device for diagnosing and evaluating the motion state of an arch load, characterized in that: include: A motion bracket, wherein two motion swing rods are rotatably connected to the motion bracket, a motion pedal is fixedly connected to the bottom of the motion swing rod, a first shaft sleeve is fixedly connected to the upper end of the motion swing rod, a second shaft sleeve is fixedly connected to the motion bracket, an eccentric driving mechanism is arranged between the first shaft sleeve and the second shaft sleeve, and the eccentric driving mechanism comprises a first eccentric wheel and a second eccentric wheel, an eccentric rod is fixedly connected between the first eccentric wheel and the second eccentric wheel, a first ratchet plate is arranged between the first eccentric wheel and the first shaft sleeve, the first ratchet plate and the first eccentric wheel are engaged with each other, a first spring is arranged between the first ratchet plate and the first shaft sleeve, a second ratchet plate is arranged between the second eccentric wheel and the second shaft sleeve, the second ratchet plate and the second eccentric wheel are engaged with each other, and a second spring is arranged between the second ratchet plate and the second shaft sleeve; The eccentric rod is rotatably connected to an eccentric connecting rod, and the lower end of the eccentric connecting rod is transmission-connected to a piston air pump. A first air inlet is provided at the upper end of the motion rocker arm, and the lower end of the motion rocker arm is connected to a motion pedal through a cavity. A foot pedal is fixedly connected to the motion pedal, and airtight expansion grooves are densely provided on the foot pedal. A pneumatic contact is slidably connected in the airtight expansion groove, and a displacement sensor is arranged in the pneumatic contact.

2. The device for diagnosing and evaluating the motion state of an arch load according to claim 1, characterized in that: A first rotating shaft is fixedly connected to the outer side of the first eccentric wheel, the first rotating shaft passes through the first sleeve and the first ratchet, and the first rotating shaft is rotatably connected to the first sleeve and the first ratchet. A second rotating shaft is fixedly connected to the outer side of the second eccentric wheel, the second rotating shaft passes through the second sleeve and the second ratchet, and the second rotating shaft is rotatably connected to the second sleeve and the second ratchet.

3. The device for diagnosing and evaluating the motion state of an arch load according to claim 2, characterized in that: A first ratchet tooth is processed on the outer side of the first eccentric wheel, a third ratchet tooth is processed on the inner side of the first ratchet disk, the first ratchet tooth and the third ratchet tooth are interlocked with each other, a second ratchet tooth is processed on the outer side of the second eccentric wheel, a fourth ratchet tooth is processed on the inner side of the second ratchet disk, the second ratchet tooth and the fourth ratchet tooth are interlocked with each other.

4. The device for diagnosing and evaluating the motion state of an arch load according to claim 3, characterized in that: The first ratchet teeth are oriented in the same direction as the second ratchet teeth, and the third ratchet teeth are oriented in the same direction as the fourth ratchet teeth.

5. The device for diagnosing and evaluating the motion state of an arch load according to claim 2, characterized in that: The first ratchet disc is fixedly connected with a limit slider, and the first ratchet disc is slidably connected with the motion swing rod via the limit slider.

6. The device for diagnosing and evaluating the motion state of an arch load according to claim 2, characterized in that: A step shaft is fixedly connected to the outer side of the second ratchet disk, one end of the step shaft is inserted into the second sleeve, the second spring is also located in the second sleeve, and a limit strip is fixedly connected to the outer side of the step shaft, and the step shaft is slidably connected to the second sleeve via the limit strip.

7. The device for diagnosing and evaluating the motion state of an arch load according to claim 1, characterized in that: The piston air pump includes a piston cylinder, which is located inside the moving rocker arm and fixedly connected to the moving rocker arm. A driving piston is arranged inside the piston cylinder, a piston rod is fixedly connected above the driving piston, and the upper end of the piston rod is rotatably connected to an eccentric connecting rod. A first one-way valve is arranged on the driving piston, a second one-way valve is arranged at the bottom of the piston cylinder, and a second air inlet is opened at the top of the piston cylinder.

8. The device for diagnosing and evaluating the motion state of an arch load according to claim 1, characterized in that: A constant pressure valve is arranged at the bottom of the moving swing rod.

9. The device for diagnosing and evaluating the motion state of arch load according to claim 2, characterized in that: A counterweight box is provided on each side of the motion bracket, and more than two groups of counterweight plates are stacked in the counterweight box, and adjacent counterweight plates are fixedly connected by connecting ropes. A winding wheel is fixedly connected to the end of the second rotating shaft, and a steel wire rope is wound on the winding wheel. The lower end of the steel wire rope is fixedly connected to the topmost counterweight plate.

10. The device for diagnosing and evaluating the motion state of arch load according to claim 1, characterized in that: The first ratchet plate is rotatably connected to a first push link via a rotating shaft, the second ratchet plate is rotatably connected to a second push link via a rotating shaft, the first push link and the second push link are rotatably connected to a lifting and lowering pressure rod together, the lifting and lowering pressure rod penetrates the moving rocker arm, and a reset button is fixedly connected to the upper end of the lifting and lowering pressure rod.

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