Medical linear guide bearing life and durability testing machine

Abstract

The application discloses a kind of medical linear guide bearing life endurance performance testing machine, including tooling table and bottom plate, bottom plate is provided with movable plate, movable plate two side walls bottom plate outside direction is bent with synchronous plate, the installation cavity for installing outside linear guide bearing to be measured by outside between synchronous plate inner wall and bottom plate side wall is formed, connecting structure for being detachably connected with the sliding part of outside linear guide bearing to be measured is arranged on movable plate, driving part for driving movable plate along the length direction of bottom plate positive sliding and sensing part for driving movable plate reverse sliding by driving part when movable plate slides to limit distance are arranged on bottom plate, limiting structure for increasing the load bearing of movable plate and preventing movable plate from bending deformation due to the suspension caused by sliding movement is arranged on movable plate.The application solves the problem that there is no testing machine for simulating the actual operating condition of medical linear guide bearing and conducting life endurance test in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of linear guide bearing test fixtures, in particular to a medical linear guide bearing life endurance performance testing machine. BACKGROUND

[0002] In the field of medical equipment, linear guide bearings, as key transmission components, are widely used in medical devices such as operating tables, medical imaging equipment, and rehabilitation equipment. Their performance directly affects the running accuracy, stability, and service life of the equipment. Medical scenarios have very high reliability requirements for linear guide bearings. They not only need to withstand complex dynamic loads, but also need to maintain high-precision operation in frequent reciprocating motion. Therefore, it is crucial to test the life endurance performance of linear guide bearings.

[0003] Currently, there are many types of testing equipment for linear guide bearings on the market, but there are few professional testing machines designed for special working conditions in the medical field. Traditional testing equipment often has the following shortcomings: first, it lacks the ability to simulate the actual operating conditions of medical linear guide bearings, such as the inability to accurately control the stroke, speed, and load changes of reciprocating motion, resulting in deviations between test results and actual use scenarios; second, existing equipment does not fully consider the weight-bearing problem of moving parts and stability during motion in the structural design. When the moving plate slides to the limit position, it is easy to bend and deform due to suspension, which not only affects the testing accuracy, but also may cause additional damage to the measured bearings; third, most equipment does not have an effective sensing feedback mechanism, making it difficult to automatically switch the reciprocating motion of the moving plate, which requires manual intervention, reducing testing efficiency and increasing operation errors. SUMMARY

[0004] To address the shortcomings of the prior art, the present application provides a medical linear guide bearing life endurance performance testing machine to solve the problem of lacking a testing machine for simulating the actual operating conditions of medical linear guide bearings and testing their life endurance.

[0005] In order to achieve the above object, the application provides a medical linear guide bearing life endurance performance testing machine, which comprises a tooling table and a bottom plate arranged on the top wall of the tooling table, the bottom plate is provided with a movable plate which slides relative to the bottom plate, and the sliding direction of the movable plate is consistent with the length direction of the bottom plate, the side walls of the movable plate are bent outward from the bottom plate to form a synchronous plate, an installation cavity for installing an external linear guide bearing to be tested is formed between the inner wall of the synchronous plate and the side wall of the bottom plate, a connecting structure for detachably connecting the sliding part of the external linear guide bearing to be tested is arranged on the movable plate, a driving member for driving the movable plate to slide forward along the length direction of the bottom plate and a sensing member for driving the movable plate to slide reversely through the driving member when the movable plate slides to the limit distance are arranged on the bottom plate, and a limiting structure for increasing the bearing capacity of the movable plate and preventing the movable plate from being suspended and causing bending deformation of the movable plate due to sliding movement is arranged on the movable plate.

[0006] The above technical solution has the advantages that: the stable base design of the tooling table and the bottom plate provides a reliable support platform for the entire test process, ensuring that the equipment main body does not displace or deform during long-term reciprocating motion testing, laying the foundation for high-precision testing; the sliding cooperation structure of the movable plate and the bottom plate can accurately simulate the reciprocating motion conditions of the medical linear guide bearing in actual medical equipment, so that the motion form and stress direction of the bearing to be tested during the test process are highly consistent with the actual use scene, effectively improving the reliability of the test results; the detachable connection of the movable plate and the bearing sliding part through the connecting structure not only ensures the effective transmission of the motion load during the test process, but also adapts to the test requirements of bearings of different models and specifications, greatly improving the universality of the testing machine; through the cooperative work of the driving member and the sensing member, an automatic reciprocating motion control system is constructed, the driving member can stably output driving force to push the movable plate to slide forward along the length direction of the bottom plate, and the sensing member can timely trigger a reverse driving instruction when the movable plate reaches the limit position, so that the movable plate automatically switches the motion direction, forming a continuous reciprocating motion test cycle, which does not require manual intervention, not only improves the test efficiency, but also avoids errors that may be introduced by human operation, ensuring the stability and consistency of the test process. The setting of the limiting structure in the above technology is more targeted to the possible suspension deformation of the movable plate during the sliding process, which increases the bearing capacity of the movable plate and limits its unreasonable displacement, ensures that the movable plate maintains good rigidity and flatness during the entire motion process, avoids interference of the test results caused by structural deformation, and guarantees the accuracy and reliability of the test data from the mechanical structure level.

[0007] The application further provides that the top wall of the movable plate is provided with a connecting groove corresponding to the position of each mounting cavity along the sliding direction of the movable plate, a plurality of mounting holes are uniformly distributed in the connecting groove along the sliding direction of the movable plate, the connecting structure comprises a plurality of connecting shafts for threaded connection with the sliding part of the external linear guide rail bearing to be tested, and a plurality of connecting shafts are arranged in threaded connection with part of the mounting holes.

[0008] The above technical solution has the advantages that: the connecting groove provided on the top wall of the movable plate in the above technology extends along the sliding direction, and the uniformly distributed mounting holes form an adjustable mounting reference, and in combination with a plurality of connecting shafts threaded with the mounting holes, appropriate mounting holes can be selected for connection according to the structure size and mounting spacing of the sliding part of different bearings to be tested, so that the compatible testing of various types of bearings can be realized, and through the threaded connection of the connecting shafts and the mounting holes, the driving force and load can be stably transmitted during the reciprocating movement of the movable plate, avoiding the interruption or abnormal data of the test caused by loose connection, and at the same time, the detachable connection mode facilitates the separate maintenance and replacement of the connecting parts, when the connecting shafts or mounting holes are worn due to long-term use, the entire movable plate does not need to be replaced, and only the corresponding parts need to be replaced to restore the performance of the equipment, effectively improving the maintenance convenience and service life of the testing machine, in addition, the open design of the connecting groove facilitates the operator to intuitively observe the mounting state of the bearing, ensures that the threaded connection of the connecting shaft and the sliding part reaches the specified fastening degree, and further improves the safety and reliability of the testing process.

[0009] The application further provides that the driving structure comprises a servo motor and a mounting seat for mounting the servo motor on the bottom wall of the end of the bottom plate, a first pulley is coaxially connected to the output end of the servo motor, a linkage seat is arranged on the bottom wall of the beginning end of the bottom plate, and a second pulley is rotatably arranged on the linkage seat, a transmission belt is drivingly connected between the first pulley and the second pulley, the driving structure further comprises a synchronization seat arranged on the outer wall of one side of the synchronization plate, the synchronization seat is composed of a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are vertically connected and arranged, a plurality of connecting bolts are detachably connected between the horizontal plate and the belt body of the transmission belt, and the vertical plate is connected with the synchronization plate.

[0010] The servo motor is used as a core power source in the above technical solution, has the characteristics of high rotation speed control precision and stable torque output, can accurately adjust the sliding speed of the movable plate according to test requirements, and simulates the movement speed of the medical linear guide bearing in different use scenarios; the belt transmission mechanism composed of the first pulley, the second pulley and the transmission belt has the advantages of stable transmission and shock absorption, can stably convert the rotary motion of the servo motor into the linear sliding motion of the movable plate, avoids the impact load that may be generated by rigid transmission, and protects the bearing to be tested and the driving part from damage caused by instantaneous overload, and the setting of the synchronous seat combines the linear motion of the transmission belt with the sliding motion of the movable plate, the fixed connection between the vertical plate and the synchronous plate ensures the effective transmission of the driving force, and the detachable connection between the horizontal plate and the transmission belt facilitates the adjustment of the tension of the transmission belt, so that the belt transmission is always in the best working state.

[0011] The present application further provides that the outer wall of the synchronous plate is uniformly provided with a plurality of connection holes in the sliding direction of the movable plate, and the vertical plate is provided with a plurality of adjusting bolts, and the adjusting bolts are threadedly connected with part of the connection holes.

[0012] The above technical solution has the advantages that: the connection holes uniformly distributed on the outer wall of the synchronous plate and the adjusting bolts are cooperatively designed, which provides a flexible and adjustable mounting method for the connection of the synchronous seat and the synchronous plate. Since the tension of the transmission belt or the initial position of the movable plate may need to be adjusted in different test scenarios, the uniform distribution of the connection holes allows the operator to select the appropriate connection position according to the actual requirements, so as to accurately adjust the mounting position of the synchronous seat on the synchronous plate. This adjustable connection method can effectively adapt to the length change of the transmission belt due to wear in long-term use. By reselecting the cooperation position of the connection hole and the adjusting bolt, the tension of the transmission belt can be easily adjusted, so that the belt transmission mechanism always maintains stable transmission efficiency, and the slipping phenomenon caused by loose belt or component damage caused by excessive tension is avoided.

[0013] The present application further provides that the bottom wall of the synchronous plate is provided with a limiting block, the limiting block is located away from the center of the bottom plate and close to the end of the movable plate, and the sensing member includes a travel switch for colliding with the limiting block when the movable plate slides to the limit distance to output a feedback signal to the servo motor, and the travel switch is arranged on the bottom wall at the center of the bottom plate.

[0014] The technical scheme has the beneficial effects that: the cooperation of the sensing member and the limiting block in the above technical scheme forms a precise limit position detection and motion direction switching system; the limiting block is arranged on the bottom wall of the synchronous plate and close to the end of the movable plate, and the position thereof is accurately corresponding to the limit distance of the sliding of the movable plate; when the movable plate slides to the position under the action of the driving member, the limiting block collides with the travel switch arranged on the bottom wall of the bottom plate, and the travel switch outputs a feedback signal to the servo motor, which can monitor the position state of the movable plate in real time, and ensure that the reverse driving instruction is immediately sent when the preset limit position is reached, so that the servo motor quickly adjusts the rotating direction, and the movable plate starts to slide reversely, forming an automatic reciprocating motion cycle. The cooperation of the limiting block and the travel switch not only improves the test efficiency, but also provides safety protection for the whole test process. The travel switch is a prior art, and therefore the structure and function thereof will not be described in detail.

[0015] The application further provides that the limiting structure comprises a fixing frame arranged on the top wall at the center of the movable plate, the fixing frame is arranged vertically opposite to the movable plate, a slot is formed in the top of the fixing frame, a main shaft is arranged in the slot, a fixed block is arranged at the beginning of the movable plate, a secondary shaft is arranged on the fixed block, a connecting block is arranged on the main shaft and the secondary shaft, and a supporting rod is arranged above the movable plate, the two ends of the supporting rod are connected with the two connecting blocks, and the supporting rod is arranged obliquely opposite to the movable plate.

[0016] The technical scheme has the beneficial effects that: the fixing frame is arranged vertically on the top wall at the center of the movable plate, and cooperates with the main shaft, the secondary shaft and the connecting block to form a supporting frame; when the movable plate slides along the bottom plate, the supporting rod always maintains the oblique supporting state with the movable plate, so that when the movable plate slides to different positions, especially when it is close to the limit distance and partially suspended, the supporting force of the supporting rod can share the load of the movable plate, and the overall rigidity of the movable plate is enhanced, that is, the force distribution of the movable plate is converted from single bottom plate support to multi-point support, and the load bearing capacity of the movable plate is significantly improved; when the end of the movable plate is suspended, the triangular supporting structure formed by the supporting rod and the movable plate can effectively resist the bending moment, prevent the movable plate from being deformed due to gravity or load, and ensure that the movable plate always maintains a flat state during reciprocating motion. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional view of one side of the application;

[0018] Figure 2 It is a three-dimensional view of another side of the application;

[0019] Figure 3 It is a three-dimensional view of the application after removing the movable plate and its components;

[0020] Figure 4 Figure 4 is a three-dimensional view of the bottom perspective of the activity board in the present application;

[0021] Figure 5 Figure 5 is a side partial cross-sectional view of the present application. DETAILED DESCRIPTION

[0022] The application provides a medical linear guide bearing life endurance performance testing machine, which comprises a tooling table 1 and a bottom plate 11 arranged on the top wall of the tooling table 1. An active plate 2 is arranged on the bottom plate 11 in a sliding mode and the sliding direction of the active plate 2 is consistent with the length direction of the bottom plate 11. Synchronous plates 21 are arranged on the two side walls of the active plate 2 and outside the bottom plate 11. An installation cavity 22 for installing an external linear guide bearing to be tested is formed between the inner wall of the synchronous plate 21 and the side wall of the bottom plate 11. A connecting structure for detachably connecting the sliding part of the external linear guide bearing to be tested is arranged on the active plate 2. A driving member for driving the active plate 2 to slide in the length direction of the bottom plate 11 and a sensing member for driving the active plate 2 to slide in the reverse direction through the driving member when the active plate 2 slides to the limit distance are arranged on the bottom plate 11. A limiting structure for increasing the bearing capacity of the active plate 2 and preventing the active plate 2 from being suspended due to the sliding movement and causing the active plate 2 to be bent and deformed is arranged on the active plate 2. Connection grooves 23 are arranged on the top wall of the active plate 2 at positions corresponding to the two installation cavities 22 and along the sliding direction of the active plate 2. A plurality of installation holes 231 are uniformly distributed in the connection grooves 23 along the sliding direction of the active plate 2. The connecting structure comprises a plurality of connecting shafts 24 for threadedly connecting the sliding part of the external linear guide bearing to be tested. A plurality of the connecting shafts 24 are threadedly matched with part of the installation holes 231 in the plurality of installation holes 231. The driving structure comprises a servo motor 3 and a mounting seat 31 for mounting the servo motor 3 on the bottom wall at the end of the bottom plate 11. A first pulley 32 is coaxially connected to the output end of the servo motor 3. A linkage seat is arranged on the bottom wall at the beginning of the bottom plate 11 and a second pulley 33 is rotationally arranged on the linkage seat. A transmission belt 34 is transmissionally connected between the first pulley 32 and the second pulley 33. The driving structure further comprises a synchronous seat arranged on the outer wall of the synchronous plate 21. The synchronous seat is composed of a vertical plate 12 and a horizontal plate 13. The vertical plate 12 and the horizontal plate 13 are perpendicularly connected. A plurality of connecting bolts 131 are detachably connected between the horizontal plate 13 and the belt body of the transmission belt 34. The vertical plate 12 is connected with the synchronous plate 21. A plurality of connecting holes 211 are uniformly distributed on the outer wall of the synchronous plate 21 along the sliding direction of the active plate 2. A plurality of adjusting bolts 121 are arranged on the vertical plate 12. A plurality of the adjusting bolts 121 are threadedly connected with part of the connecting holes 211 in the plurality of connecting holes 211. Limiting blocks 25 are arranged on the bottom wall of the synchronous plate 21. The limiting blocks 25 are arranged away from the center of the bottom plate 11 and close to the end of the active plate 2. The sensing member comprises a travel switch 4 for colliding with the limiting blocks 25 when the active plate 2 slides to the limit distance to output a feedback signal to the servo motor 3. The travel switch 4 is arranged on the bottom wall at the center of the bottom plate 11. The limiting structure comprises a fixing frame 5 arranged on the top wall at the center of the active plate 2. The fixing frame 5 is arranged in a perpendicular mode relative to the active plate 2. A slot 51 is arranged on the top of the fixing frame 5. A main shaft 511 is rotationally arranged in the slot 51.The movable plate 2 is provided with a fixed block 52, the fixed block 52 is rotationally provided with a secondary shaft 521, the primary shaft 511 and the secondary shaft 521 are both provided with a connecting block 53, the limiting structure further comprises a supporting rod 54 arranged above the movable plate 2, the two ends of the supporting rod 54 are respectively connected with the two connecting blocks 53, and the supporting rod 54 is oppositely and obliquely arranged with the movable plate 2.

[0023] The bearing to be measured in the above-mentioned technology is marked as 6 in the drawings, and the sliding part thereof is marked as 61.

[0024] The basic principles and main features of the present application and the advantages of the present application are shown and described above, and those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A medical linear guide bearing life and durability testing machine, characterized by: The cam is provided with a plurality of movable plates, and the movable plates are provided with a plurality of movable plates respectively on the cam, and the movable plates are provided with a plurality of movable plates respectively on the cam, and the movable plates are provided with a plurality of movable plates respectively on the cam, and the plurality of movable plates are provided with a plurality of movable plates respectively on the cam, and the plurality of movable plates are provided with a plurality of movable plates respectively on the cam, and the plurality of movable plates are provided with a plurality of movable plates respectively on the cam, The movable plate is provided with a limiting structure for increasing the load-bearing capacity of the movable plate and preventing the movable plate from being suspended in the air due to sliding movement, causing the movable plate to be bent and deformed. The limiting structure includes a fixing frame arranged on the top wall at the center of the movable plate, the fixing frame and the movable plate are arranged perpendicularly to each other, a slot is provided on the top of the fixing frame, a main shaft is rotatably arranged in the slot, a fixing block is provided at the starting end of the movable plate, a secondary shaft is rotatably arranged on the fixed block, and connecting blocks are provided on both the main shaft and the secondary shaft. The limiting structure also includes a support rod arranged above the movable plate, the two ends of the support rod are respectively connected to two connecting blocks, and the support rod is inclined relative to the movable plate.

2. The medical linear guide bearing life and durability testing machine according to claim 1, characterized in that: The two mounting cavity positions corresponding to the top wall of the movable plate are both provided with connecting grooves along the sliding direction of the movable plate. The connecting grooves are provided with a plurality of mounting holes along the sliding direction of the movable plate. The connecting structure includes a plurality of connecting shafts for threaded connection with the sliding part of the linear guide bearing to be tested externally, and a plurality of the connecting shafts are threadedly matched with some of the plurality of mounting holes.

3. The medical linear guide bearing life and durability testing machine according to claim 1, characterized in that: The driving member includes a servo motor and a mounting seat for mounting the servo motor on the bottom wall of the end portion of the base plate, the output end of the servo motor is coaxially connected to the first pulley, a linkage seat and a second pulley rotatably arranged on the linkage seat are provided on the bottom wall of the starting end of the base plate, a transmission belt is connected with the first pulley and the second pulley, and the driving member also includes a synchronous seat provided on the outer wall of one side of the synchronous plate, the synchronous seat is composed of a vertical plate and a horizontal plate, the vertical plate is vertically connected to the horizontal plate, the horizontal plate and the belt body of the transmission belt are detachably connected by a plurality of connecting bolts, and the vertical plate is connected to the synchronous plate.

4. The medical linear guide bearing life and durability testing machine according to claim 3, characterized in that: A plurality of connection holes are evenly distributed on the outer wall of the synchronization plate along the sliding direction of the movable plate. A plurality of adjustment bolts are arranged on the vertical plate. A plurality of the adjustment bolts are threadedly connected with some of the connection holes.

5. The medical linear guide bearing life and durability testing machine according to claim 3, characterized in that: A limit block is provided on the bottom wall of the synchronization plate, and the limit block is provided away from the center of the bottom plate and close to the end of the movable plate. The sensor includes a travel switch for colliding with the limit block when the movable plate slides to the limit distance to output a feedback signal to the servo motor, and the travel switch is provided on the bottom wall at the center of the bottom plate.

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