A deflection detection device for the pipe beam of a maglev transportation system

Abstract

This application relates to a detection device for the deflection of a pipe beam in a maglev transportation system, and relates to the technical field of pipe beam deflection measurement. It includes a base; a measurement component, which is slidably installed on the base and is used to measure the deflection of the pipe beam; two groups of support components, which are symmetrically arranged on the base, and the pipe beam is arranged on the support components; two groups of lifting components, which are symmetrically installed on the base, the lifting components are connected to the pipe beam, and the lifting components are used to lift the pipe beam; a counterweight component, which is connected to the lifting component, and the counterweight component is used to apply gravity to the pipe beam. This application can adjust the support points during the detection of the pipe beam deflection, avoid errors in multi-point measurement, and improve the accuracy of the pipe beam deflection detection result.

Description

Technical Field

[0001] This application relates to the technical field of beam deflection measurement, and particularly to a beam deflection detection device for a maglev transportation system. Background Art

[0002] The beam for a maglev transportation system is also called an nu beam, which is composed of an upper "n"-shaped semi-circular steel pipe cover structure and a lower "u"-shaped composite structure of "steel structure + prestressed concrete". The low-vacuum tube maglev high-speed vehicle travels inside the nu beam to overcome problems such as the friction between the wheels and the track and air resistance, and finally realizes a high-speed operation with a speed of 1000 kilometers per hour.

[0003] Among the multiple detection indexes of the nu beam, the nu beam deflection is very important index data. The nu beam deflection detection is to detect the lower "u"-shaped part of "steel structure + prestressed concrete". The nu beam deflection detection is an important link in the maglev transportation system project to ensure the structural safety of the nu beam, avoid the nu beam from breaking, and improve the structural stability of the maglev transportation system. When detecting the nu beam deflection, it is necessary to measure multiple points on the nu beam. When measuring different points, it is necessary to correspondingly adjust the support points of the nu beam to avoid the influence of the support point position on the measurement position of the measurement point.

[0004] In view of the above related technologies, at present, the support points cannot be adjusted during the detection of the nu beam deflection, resulting in errors in multi-point measurement and affecting the nu beam deflection detection result. Summary of the Invention

[0005] In order to be able to adjust the support points during the detection of the beam deflection, avoid errors in multi-point measurement, and improve the accuracy of the beam deflection detection result, this application provides a beam deflection detection device for a maglev transportation system.

[0006] A beam deflection detection device for a maglev transportation system provided by this application adopts the following technical solutions:

[0007] A beam deflection detection device for a maglev transportation system includes:

[0008] A base;

[0009] A measurement component, the measurement component is slidably installed on the base, and the measurement component is used for measuring the beam deflection;

[0010] Two groups of support components, the two groups of support components are symmetrically arranged on the base, and the beam is arranged on the support components;

[0011] Two sets of lifting components, the two sets of lifting components are symmetrically installed on the base, the lifting components are connected to the pipe beam, and the lifting components are used to lift the pipe beam;

[0012] A counterweight assembly, the counterweight assembly is connected to the lifting assembly, and the counterweight assembly is used to apply gravity to the pipe beam;

[0013] Wherein, both sets of the support components include:

[0014] A sliding housing, the sliding housing is slidably installed on the base, the sliding housing abuts against the pipe beam, and two abutting blocks are symmetrically and fixedly installed at the top of the sliding housing;

[0015] A first telescopic rod, the fixed end of the first telescopic rod is fixedly installed in the abutting block, a roller is rotatably installed at the movable end of the first telescopic rod, the roller abuts against the pipe beam, a first return spring is sleeved on the first telescopic rod, one end of the first return spring is fixedly connected to the fixed end of the first telescopic rod, and the other end of the first return spring is fixedly connected to the movable end of the first telescopic rod;

[0016] A rolling motor, the fixed end of the rolling motor is slidably installed in the sliding housing, and the output shaft of the rolling motor is coaxially and fixedly connected to the roller.

[0017] By adopting the above technical solution, when a pipe beam deflection detection device of a maglev transportation system is in use, the pipe beam is lifted by two sets of lifting components, the pipe beam is separated from the sliding housing, the top of the pipe beam abuts against the roller, the first telescopic rod is stressed and its length is shortened, and then the rolling motor is controlled to start. The output shaft of the rolling motor works and drives the roller to rotate. The rotation of the roller drives the sliding housing to displace on the pipe beam, realizing the position adjustment of the sliding housing. Then, the counterweight assembly is adjusted so that the counterweight point is located at the position required for measurement. Then, the lifting assembly is adjusted so that the pipe beam is placed on the support assembly, and the measurement assembly is started to realize the deflection detection of the pipe beam. When the deflection of the pipe beam is detected through the work of a pipe beam deflection detection device of a maglev transportation system, the support point can be adjusted, avoiding errors in multi-point measurement and improving the accuracy of the pipe beam deflection detection result.

[0018] Optionally, both sets of the lifting components include:

[0019] A first housing, the first housing is fixedly installed on the base, and two first racks are symmetrically and fixedly installed in the first housing;

[0020] Lifting motor, the fixed end of the lifting motor is fixedly installed in the first housing, the output end of the lifting motor is coaxially and fixedly connected with a rotating rod, a first annular electromagnet is coaxially sleeved on the rotating rod, the first annular electromagnet can adsorb the rotating rod, and a lifting screw rod is coaxially sleeved on the first annular electromagnet;

[0021] Second housing, the second housing is inserted and slidably installed in the first housing, a connecting plate is fixedly installed on the second housing, the lifting screw rod is inserted and threadedly connected to the connecting plate, two first lifting spur gears are symmetrically and rotatably installed on the second housing, one end of the first lifting spur gear meshes with the first rack, and two second racks are symmetrically and fixedly installed on the inner wall of the second housing;

[0022] Third housing, the third housing is inserted and slidably installed in the second housing, two third racks are symmetrically and fixedly installed on the outer wall of the third housing, the end of the first lifting spur gear away from the first rack is meshed and connected with the third rack, two second lifting spur gears are symmetrically and rotatably installed on the third housing, and one end of the second lifting spur gear meshes with the second rack;

[0023] Fourth housing, the fourth housing is inserted and slidably installed in the third housing, two fourth racks are symmetrically and fixedly installed on the outer wall of the fourth housing, and the end of the second lifting spur gear away from the second rack meshes with the fourth rack;

[0024] Second annular electromagnet, the second annular electromagnet is coaxially sleeved and slidably installed on the rotating rod, and a first transmission spur gear is coaxially sleeved on the second annular electromagnet;

[0025] Fixed plate, the fixed plate is fixedly installed on the second housing, a double-headed screw is rotatably installed on the fixed plate, the end of the double-headed screw away from the fixed plate is coaxially sleeved and fixedly connected with a second transmission spur gear, and the second transmission spur gear meshes with the first transmission spur gear;

[0026] Two clamping plates, the two clamping plates are symmetrically sleeved and threadedly connected to both ends of the double-headed screw, both clamping plates are slidably installed on the outer side wall of the second housing, and the clamping plates are in contact with the pipe beam.

[0027] By adopting the above technical solution, when it is necessary to lift the pipe beam, the lifting motor is controlled to work. The output end of the lifting motor rotates to drive the rotating rod to rotate. Then, the second annular electromagnet is controlled to be energized. The second annular electromagnet adsorbs the rotating rod. The rotating rod rotates to drive the second annular electromagnet to rotate. The second annular electromagnet rotates to drive the first transmission spur gear to rotate. The first transmission spur gear rotates to drive the second transmission spur gear to rotate. The second transmission spur gear rotates to drive the double-headed screw to rotate. The double-headed screw rotates to drive the two clamping plates to move towards each other. The two clamping plates clamp the pipe beam, improving the structural stability of the lifting assembly. The pipe beam is separated from the support assembly through the lifting assembly, facilitating the work of the support assembly.

[0028] Optionally, the counterweight assembly includes:

[0029] Two first electromagnetic shafts, the two first electromagnetic shafts are symmetrically and fixedly installed on the two fourth shells;

[0030] Two second electromagnetic shafts, the two second electromagnetic shafts are respectively passed through and rotatably installed on the two fourth shells. A first driven bevel gear is coaxially and fixedly connected to the second electromagnetic shaft, and the first driven bevel gear is rotatably installed in the fourth shell;

[0031] A guide rod, the two ends of the guide rod are coaxially arranged with the two first electromagnetic shafts respectively, and the two first electromagnetic shafts can adsorb the guide rod;

[0032] A transmission screw, the two ends of the transmission screw are coaxially arranged with the two second electromagnetic shafts respectively, and the two second electromagnetic shafts can adsorb the transmission screw;

[0033] A first driving bevel gear, the first driving bevel gear is rotatably installed in the fourth shell, the first driving bevel gear is meshed and connected with the first driven bevel gear, and a third annular electromagnet is passed through and fixedly connected to the first driving bevel gear. The third annular electromagnet is coaxially sleeved and slidably installed on the rotating rod;

[0034] A counterweight block, the counterweight block is sleeved and slidably installed on the guide rod, the counterweight block is sleeved and threadedly connected to the transmission screw, and the counterweight block abuts against the pipe beam.

[0035] By adopting the above technical solution, while the lifting component lifts the pipe beam, the controller controls the first electromagnetic shaft and the second electromagnetic shaft to be electrified. The first electromagnetic shaft adsorbs to the guide rod, and the second electromagnetic shaft adsorbs to the transmission screw. The fourth housing moves in a direction away from the base. The movement of the fourth housing drives the first electromagnetic shaft and the second electromagnetic shaft to move. The movement of the first electromagnetic shaft and the second electromagnetic shaft drives the guide rod and the transmission screw to move synchronously. The movement of the guide rod and the transmission screw drives the counterweight to move, so that the counterweight is separated from the pipe beam. When it is necessary to adjust the deflection force application point of the pipe beam, the controller controls the third annular electromagnet to be electrified. The third annular electromagnet adsorbs to the rotating rod. The rotation of the rotating rod drives the third annular electromagnet to rotate. The rotation of the third annular electromagnet drives the first driving bevel gear to rotate. The rotation of the first driving bevel gear drives the first driven bevel gear to rotate. The rotation of the first driven bevel gear drives the second electromagnetic shaft to rotate. The rotation of the second electromagnetic shaft drives the transmission screw to rotate. The rotation of the transmission screw causes the counterweight to slide in the axial direction of the guide rod, realizing the adjustment of the position of the counterweight, and further realizing the adjustment of the deflection force application point of the pipe beam.

[0036] Optionally, a controller is installed on the base, and the rolling motor, the lifting motor, the first annular electromagnet, the second annular electromagnet, and the third annular electromagnet are all electrically connected to the controller.

[0037] By adopting the above technical solution, the controller controls the rolling motor, the lifting motor, the first annular electromagnet, the second annular electromagnet, and the third annular electromagnet, reducing the operation difficulty of the staff for a pipe beam deflection detection device of a maglev transportation system.

[0038] Optionally, rubber pads are fixedly installed at one ends of the two clamping plates close to each other.

[0039] By adopting the above technical solution, the tightness between the clamping plate and the pipe beam is improved, and the structural stability of a pipe beam deflection detection device of a maglev transportation system is improved.

[0040] Optionally, it further includes a cleaning component, and the cleaning component includes:

[0041] A second telescopic rod, the fixed end of the second telescopic rod is fixedly installed in the sliding housing, a second return spring is sleeved on the second telescopic rod, one end of the second return spring is fixedly connected to the fixed end of the second telescopic rod, and the other end of the second return spring is fixedly connected to the movable end of the second telescopic rod;

[0042] A driving rod, the driving rod is coaxially and rotatably installed on the movable end of the second telescopic rod, and the driving rod passes through and is rotatably installed on the sliding housing;

[0043] A brush plate is fixedly mounted on an end of the driving rod away from the second telescopic rod, and the brush plate abuts against the pipe beam.

[0044] By adopting the above technical solution, the brush plate brushes the bottom wall of the pipe beam to prevent impurities from adhering to the bottom wall of the pipe beam, thereby affecting the measurement accuracy of the pipe beam deflection.

[0045] Optionally, a clearance groove is provided on the sliding shell, and the brush plate can be embedded in the clearance groove.

[0046] By adopting the above technical solution, the bottom wall of the tube beam can be closely fitted with the sliding shell.

[0047] Optionally, the cleaning component further includes:

[0048] Two third telescopic rods, the two fixed ends of the third telescopic rods being symmetrically and fixedly mounted in the sliding housing, the third telescopic rods being sleeved with a third return spring, one end of the third return spring being fixedly connected to the fixed end of the third telescopic rod, and the other end of the third return spring being fixedly connected to the movable end of the third telescopic rod;

[0049] a cam, the cam being rotatably mounted on the movable end of the third telescopic rod, the cam being in contact with the pipe beam;

[0050] There are at least one nozzle, and at least one nozzle is fixedly installed in the clearance groove, and the nozzle is connected to the rodless cavity at the fixed end of the third telescopic rod.

[0051] By adopting the above technical solution, under the action of the third telescopic rod and the third return spring, the cam is always in contact with the pipe beam, and the sliding shell slides on the pipe beam while the cam rotates under the action of friction. The rotation of the cam drives the movable end of the third telescopic rod to reciprocate in the axial direction. When the movable end of the third telescopic rod moves toward the fixed end of the third telescopic rod, the movable end of the third telescopic rod squeezes out the cleaning liquid in the rodless cavity of the fixed end of the third telescopic rod and sprays it toward the pipe beam through the nozzle, thereby cleaning the bottom wall of the pipe beam and avoiding impurities adhering to the bottom wall of the pipe beam, which in turn affects the measurement accuracy of the deflection of the pipe beam.

[0052] Optionally, the cleaning component further includes:

[0053] a fourth telescopic rod, wherein the fixed end of the fourth telescopic rod is fixedly mounted in the sliding housing, a fourth return spring is sleeved on the fourth telescopic rod, one end of the fourth return spring is fixedly connected to the fixed end of the fourth telescopic rod, the other end of the fourth return spring is fixedly connected to the movable end of the fourth telescopic rod, and a connecting rod is coaxially and rotatably mounted on the movable end of the fourth telescopic rod;

[0054] The second driven bevel gear is coaxially sleeved and fixedly connected to the connecting rod;

[0055] The second driving bevel gear is coaxially sleeved and fixedly connected to the output end of one of the rolling motors, and the second driving bevel gear is meshed and connected with the second driven bevel gear;

[0056] The first driving spur gear is coaxially sleeved and fixedly installed on the driving rod;

[0057] The second driving spur gear is coaxially sleeved and fixedly installed on the connecting rod;

[0058] The synchronous toothed belt is wound around the first driving spur gear and the second driving spur gear, and both the first driving spur gear and the second driving spur gear are meshed and connected with the synchronous toothed belt.

[0059] By adopting the above technical solution, under the action of the fourth telescopic rod and the fourth return spring, the second driving bevel gear is always meshed with the second driven bevel gear. When the rolling motor works, the output end rotates. The rotation of the output end of the rolling motor drives the second driving bevel gear to rotate. The rotation of the second driving bevel gear drives the second driven bevel gear to rotate. The rotation of the second driven bevel gear drives the connecting rod to rotate. The rotation of the connecting rod drives the second driving spur gear to rotate. The rotation of the second driving spur gear drives the synchronous toothed belt to move. The movement of the synchronous toothed belt drives the first driving spur gear to rotate. The rotation of the first driving spur gear drives the driving rod to rotate. The rotation of the driving rod drives the brush plate to rotate, so that the brush plate brushes the bottom wall of the pipe beam, avoiding impurities adhering to the bottom wall of the pipe beam, and thus affecting the measurement accuracy of the deflection of the pipe beam.

[0060] Optionally, anti-slip rubbers are wound around and fixedly connected to the circumferences of the roller and the cam.

[0061] By adopting the above technical solution, it is avoided that the roller and the cam slip during rotation, thus affecting the normal use of a pipe beam deflection detection device for a maglev transportation system.

[0062] In summary, the present application includes at least one of the following beneficial technical effects:

[0063] 1. When a maglev transportation system beam deflection detection device is in use, the beam is lifted by two sets of lifting components. The beam is disengaged from the sliding housing, and the top of the beam abuts against the roller. The first telescopic rod is stressed and its length is shortened. Then, the rolling motor is controlled to start. The output shaft of the rolling motor operates and drives the roller to rotate. The rotation of the roller drives the sliding housing to displace on the beam, realizing the position adjustment of the sliding housing. Then, the counterweight component is adjusted so that the counterweight point is located at the measurement required position. Then, the lifting component is adjusted so that the beam is placed on the support component, and the measurement component is started to realize the deflection detection of the beam. When the deflection of the beam is detected through the operation of a maglev transportation system beam deflection detection device, the support point can be adjusted, avoiding errors in multi-point measurement and improving the accuracy of the beam deflection detection result;

[0064] 2. When the beam needs to be lifted, the lifting motor is controlled to operate. The output end of the lifting motor rotates and drives the rotating rod to rotate. Then, the second annular electromagnet is controlled to be energized. The second annular electromagnet adsorbs to the rotating rod. The rotation of the rotating rod drives the second annular electromagnet to rotate. The rotation of the second annular electromagnet drives the first transmission spur gear to rotate. The rotation of the first transmission spur gear drives the second transmission spur gear to rotate. The rotation of the second transmission spur gear drives the double-headed screw to rotate. The rotation of the double-headed screw drives the two clamping plates to move towards each other, clamping the beam and improving the structural stability of the lifting component. The beam is disengaged from the support component through the lifting component, facilitating the operation of the support component;

[0065] 3. Under the action of the fourth telescopic rod and the fourth return spring, the second driving bevel gear is always meshed with the second driven bevel gear. When the rolling motor operates, its output end rotates. The rotation of the output end of the rolling motor drives the second driving bevel gear to rotate. The rotation of the second driving bevel gear drives the second driven bevel gear to rotate. The rotation of the second driven bevel gear drives the connecting rod to rotate. The rotation of the connecting rod drives the second driving spur gear to rotate. The rotation of the second driving spur gear drives the synchronous toothed belt to move. The movement of the synchronous toothed belt drives the first driving spur gear to rotate. The rotation of the first driving spur gear drives the driving rod to rotate. The rotation of the driving rod drives the brush plate to rotate, so that the brush plate sweeps the bottom wall of the beam, preventing impurities from adhering to the bottom wall of the beam and affecting the measurement accuracy of the beam deflection. Description of the Drawings

[0066] Figure 1 is the structural schematic diagram of an embodiment of the present application;

[0067] Figure 2 is the structural schematic diagram for showing the measurement component;

[0068] Figure 3 is the structural schematic diagram for showing the support component;

[0069] Figure 4 It is a schematic diagram for showing the internal structure of the sliding housing;

[0070] Figure 5 It is a schematic diagram for showing the structure of the relief groove;

[0071] Figure 6 It is a schematic diagram for showing the structure of the lifting component;

[0072] Figure 7 It is a sectional view showing the structure of the lifting component.

[0073] Explanation of reference numerals:

[0074] 1. Base;

[0075] 2. Measuring component;

[0076] 3. Pipe beam;

[0077] 4. Support component; 41. Sliding housing; 411. Abutting block; 412. Relief groove; 42. First telescopic rod; 421. Roller; 422. First return spring; 43. Rolling motor;

[0078] 5. Lifting component; 51. First housing; 511. First rack; 52. Lifting motor; 521. Rotating rod; 522. First annular electromagnet; 523. Lifting screw; 53. Second housing; 531. Connecting plate; 532. First lifting spur gear; 533. Second rack; 54. Third housing; 541. Third rack; 542. Second lifting spur gear; 55. Fourth housing; 551. Fourth rack; 56. Second annular electromagnet; 561. First driving spur gear; 57. Fixed plate; 571. Double-headed screw; 572. Second driving spur gear; 58. Clamping plate; 581. Rubber pad;

[0079] 6. Counterweight component; 61. Guide rod; 62. Conveying screw; 621. First driven bevel gear; 63. First driving bevel gear; 631. Third annular electromagnet; 64. Counterweight block; 65. First electromagnetic shaft; 66. Second electromagnetic shaft;

[0080] 7. Cleaning component; 71. Second telescopic rod; 711. Second return spring; 72. Driving rod; 73. Brush plate; 74. Third telescopic rod; 741. Third return spring; 742. Cam; 743. Sprayer; 75. Fourth telescopic rod; 751. Fourth return spring; 752. Connecting rod; 753. Second driven bevel gear; 76. Second driving bevel gear; 77. First driving spur gear; 78. Second driving spur gear; 79. Synchronous toothed belt. Detailed implementation manners

[0081] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0082] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0083] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0084] The following further elaborates on this application Figure 1-7 in conjunction with the attached drawings.

[0085] The embodiment of this application discloses a detection device for the deflection of a pipe beam of a maglev transportation system.

[0086] Referring to Figure 1 and Figure 2 , a detection device for the deflection of a pipe beam of a maglev transportation system includes a base 1, a measurement assembly 2, two groups of support assemblies 4, two groups of lifting assemblies 5, and a counterweight assembly 6. A controller is installed on the base 1. The measurement assembly 2 is slidably installed on the base 1. The measurement assembly 2 is used to measure the deflection of the pipe beam 3. The measurement assembly 2 is a prior art and will not be elaborated here. The two groups of support assemblies 4 are symmetrically arranged on the base 1. The pipe beam 3 is arranged on the support assemblies 4. The two groups of lifting assemblies 5 are symmetrically installed on the base 1. The lifting assemblies 5 are connected to the pipe beam 3. The lifting assemblies 5 are used to lift the pipe beam 3. The counterweight assembly 6 is connected to the lifting assemblies 5. The counterweight assembly 6 is used to apply gravity to the pipe beam 3.

[0087] When a maglev transportation system beam deflection detection device is in use, the beam 3 is lifted by two sets of lifting components 5. Then, the position of the support component 4 is adjusted so that the support component 4 is at the position required for measurement. After that, the counterweight component 6 is adjusted so that the counterweight point is at the position required for measurement. Then, the lifting component 5 is adjusted so that the beam 3 is placed on the support component 4, and the measurement component 2 is started to realize the deflection detection of the beam 3. When the deflection detection of the beam 3 is realized through the operation of a maglev transportation system beam deflection detection device, the support point can be adjusted, avoiding errors in multi-point measurement and improving the accuracy of the beam 3 deflection detection result.

[0088] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 For both sets of support components 4, each includes a sliding housing 41, a first telescopic rod 42, and a rolling motor 43. The sliding housing 41 is slidably mounted on the base 1. The sliding housing 41 abuts against the beam 3. A relief groove 412 is formed in the sliding housing 41. Two abutting blocks 411 are symmetrically and fixedly mounted on the top of the sliding housing 41. The fixed end of the first telescopic rod 42 is fixedly mounted in the abutting block 411. The movable end of the first telescopic rod 42 is rotatably mounted with a roller 421. The roller 421 abuts against the beam 3. An anti-slip rubber is wound around and fixedly connected to the circumferential side of the roller 421. A first return spring 422 is sleeved on the first telescopic rod 42. One end of the first return spring 422 is fixedly connected to the fixed end of the first telescopic rod 42, and the other end of the first return spring 422 is fixedly connected to the movable end of the first telescopic rod 42. The first return spring 422 always applies a force to the movable end of the first telescopic rod 42 in the direction away from the fixed end of the first telescopic rod 42. The fixed end of the rolling motor 43 is slidably mounted in the sliding housing 41. The output shaft of the rolling motor 43 is coaxially and fixedly connected to the roller 421. The rolling motor 43 is electrically connected to the controller.

[0089] When the support point of the beam 3 needs to be adjusted, the beam 3 is lifted by two sets of lifting components 5. The beam 3 is separated from the sliding housing 41. The top of the beam 3 abuts against the roller 421. The first telescopic rod 42 is stressed and its length is shortened. Then, the controller is used to control the rolling motor 43 to start. The output shaft of the rolling motor 43 operates and drives the roller 421 to rotate. The rotation of the roller 421 drives the sliding housing 41 to displace on the beam 3, realizing the position adjustment of the sliding housing 41. When the deflection of the beam 3 is detected, the support point can be adjusted, avoiding errors in multi-point measurement and improving the accuracy of the beam 3 deflection detection result.

[0090] Refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7, the two sets of lifting components 5 each include a first housing 51, a lifting motor 52, a second housing 53, a third housing 54, a fourth housing 55, a second annular electromagnet 56, a second annular electromagnet 56, a fixing plate 57, and two clamping plates 58. The first housing 51 is fixedly installed on the base 1. Two first racks 511 are symmetrically and fixedly installed inside the first housing 51. The fixed end of the lifting motor 52 is fixedly installed inside the first housing 51. The lifting motor 52 is electrically connected to the controller. The output end of the lifting motor 52 is coaxially and fixedly connected to a rotating rod 521. An first annular electromagnet 522 is coaxially sleeved on the rotating rod 521. The first annular electromagnet 522 is electrically connected to the controller. The first annular electromagnet 522 can adsorb the rotating rod 521. A lifting screw 523 is coaxially sleeved on the first annular electromagnet 522. The second housing 53 is inserted and slidably installed inside the first housing 51. A connecting plate 531 is fixedly installed on the second housing 53. The lifting screw 523 is inserted and threadedly connected to the connecting plate 531. Two first lifting spur gears 532 are symmetrically and rotatably installed on the second housing 53. One end of the first lifting spur gear 532 meshes with the first rack 511. Two second racks 533 are symmetrically and fixedly installed on the inner wall of the second housing 53. The third housing 54 is inserted and slidably installed inside the second housing 53. Two third racks 541 are symmetrically and fixedly installed on the outer wall of the third housing 54. The end of the first lifting spur gear 532 away from the first rack 511 meshes with the third rack 541. Two second lifting spur gears 542 are symmetrically and rotatably installed on the third housing 54. One end of the second lifting spur gear 542 meshes with the second rack 533. The fourth housing 55 is inserted and slidably installed inside the third housing 54. Two fourth racks 551 are symmetrically and fixedly installed on the outer wall of the fourth housing 55. The end of the second lifting spur gear 542 away from the second rack 533 meshes with the fourth rack 551. The second annular electromagnet 56 is coaxially sleeved and slidably installed on the rotating rod 521. The second annular electromagnet 56 is electrically connected to the controller. A first transmission spur gear 561 is coaxially sleeved on the second annular electromagnet 56. The fixing plate 57 is fixedly installed on the second housing 53. A double-headed screw 571 is rotatably installed on the fixing plate 57. The end of the double-headed screw 571 away from the fixing plate 57 is coaxially sleeved and fixedly connected to a second transmission spur gear 572. The second transmission spur gear 572 meshes with the first transmission spur gear 561. Two clamping plates 58 are symmetrically sleeved and threadedly connected to both ends of the double-headed screw 571. Both clamping plates 58 are slidably installed on the outer side wall of the second housing 53. The clamping plates 58 are in contact with the pipe beam 3. Rubber pads 581 are fixedly installed at one end of the two clamping plates 58 close to each other.

[0091] When the pipe beam 3 needs to be lifted, the controller controls the lifting motor 52 to work. The output end of the lifting motor 52 rotates to drive the rotating rod 521 to rotate. Then the controller controls the second annular electromagnet 56 to be energized. The second annular electromagnet 56 adsorbs to the rotating rod 521. The rotating rod 521 rotates to drive the second annular electromagnet 56 to rotate. The second annular electromagnet 56 rotates to drive the first transmission spur gear 561 to rotate. The first transmission spur gear 561 rotates to drive the second transmission spur gear 572 to rotate. The second transmission spur gear 572 rotates to drive the double-headed screw rod 571 to rotate. The double-headed screw rod 571 rotates to drive the two clamping plates 58 to move towards each other. The two clamping plates 58 clamp the pipe beam 3, improving the structural stability of the lifting assembly 5.

[0092] Then the controller controls the second annular electromagnet 56 to be de-energized, enabling the second annular electromagnet 56 and the rotating rod 521 to relatively slide and relatively rotate in the axial direction. At the same time, the controller controls the first annular electromagnet 522 to be energized. The first annular electromagnet 522 adsorbs to the rotating rod 521. The rotating rod 521 rotates to drive the first annular electromagnet 522 to rotate. The first annular electromagnet 522 rotates to drive the lifting screw rod 523 to rotate. The lifting screw rod 523 rotates to cause the connecting plate 531 to move away from the base 1 in the axial direction of the lifting screw rod 523. The movement of the connecting plate 531 drives the second housing 53 to move away from the base 1. The movement of the second housing 53 drives the two clamping plates 58 to move away from the base 1. The movement of the two clamping plates 58 drives the pipe beam 3 to move away from the base 1, lifting the horizontal height of the pipe beam 3 and disengaging it from the sliding housing 41, facilitating the adjustment of the position of the sliding housing 41.

[0093] The movement of the second housing 53 drives the first lifting spur gear 532 to move away from the base 1. Since the first lifting spur gear 532 meshes with the first rack 511, the first lifting spur gear 532 rotates while moving. The rotation of the first lifting spur gear 532 drives the third rack 541 to move away from the base 1. The movement of the third rack 541 drives the third housing 54 to move away from the base 1. The movement of the third housing 54 drives the second lifting spur gear 542 to move. Since the second lifting spur gear 542 meshes with the second rack 533, the second lifting spur gear 542 rotates while moving. The rotation of the second lifting spur gear 542 drives the fourth rack 551 to move away from the base 1. The movement of the fourth rack 551 drives the fourth housing 55 to move away from the base 1.

[0094] Refer to Figure 1 、 Figure 2 、 Figure 6 and Figure 7, the counterweight assembly 6 includes a guide rod 61, a transmission screw 62, a first driving bevel gear 63, a counterweight 64, two first electromagnetic shafts 65 and two second electromagnetic shafts 66. The two first electromagnetic shafts 65 are symmetrically and fixedly installed on the two fourth housings 55. The first electromagnetic shaft 65 is electrically connected to the controller. The two second electromagnetic shafts 66 are respectively inserted and rotatably installed on the two fourth housings 55. A first driven bevel gear 621 is coaxially and fixedly connected to the second electromagnetic shaft 66. The second electromagnetic shaft 66 is electrically connected to the controller. The first driven bevel gear 621 is rotatably installed in the fourth housing 55. The two ends of the guide rod 61 are coaxially arranged with the two first electromagnetic shafts 65 respectively. The two first electromagnetic shafts 65 can adsorb the guide rod 61. The two ends of the transmission screw 62 are coaxially arranged with the two second electromagnetic shafts 66 respectively. The two second electromagnetic shafts 66 can adsorb the transmission screw 62. The first driving bevel gear 63 is rotatably installed in the fourth housing 55. The first driving bevel gear 63 is meshed and connected with the first driven bevel gear 621. A third ring-shaped electromagnet 631 is inserted and fixedly connected to the first driving bevel gear 63. The third ring-shaped electromagnet 631 is coaxially sleeved and slidably installed on the rotating rod 521. The counterweight 64 is sleeved and slidably installed on the guide rod 61. The counterweight 64 is sleeved and threadedly connected to the transmission screw 62. The counterweight 64 abuts against the pipe beam 3.

[0095] While the lifting assembly 5 lifts the pipe beam 3, the controller controls the first electromagnetic shaft 65 and the second electromagnetic shaft 66 to be energized. The first electromagnetic shaft 65 adsorbs the guide rod 61, and the second electromagnetic shaft 66 adsorbs the transmission screw 62. The fourth housing 55 moves in a direction away from the base 1. The movement of the fourth housing 55 drives the first electromagnetic shaft 65 and the second electromagnetic shaft 66 to move. The movement of the first electromagnetic shaft 65 and the second electromagnetic shaft 66 drives the guide rod 61 and the transmission screw 62 to move synchronously. The movement of the guide rod 61 and the transmission screw 62 drives the counterweight 64 to move, so that the counterweight 64 is separated from the pipe beam 3.

[0096] When it is necessary to adjust the deflection force application point of the pipe beam 3, the controller controls the third ring-shaped electromagnet 631 to be energized. The third ring-shaped electromagnet 631 adsorbs the rotating rod 521. The rotation of the rotating rod 521 drives the third ring-shaped electromagnet 631 to rotate. The rotation of the third ring-shaped electromagnet 631 drives the first driving bevel gear 63 to rotate. The rotation of the first driving bevel gear 63 drives the first driven bevel gear 621 to rotate. The rotation of the first driven bevel gear 621 drives the second electromagnetic shaft 66 to rotate. The rotation of the second electromagnetic shaft 66 drives the transmission screw 62 to rotate. The rotation of the transmission screw 62 causes the counterweight 64 to slide in the axial direction of the guide rod 61, realizing the adjustment of the position of the counterweight 64, and further realizing the adjustment of the deflection force application point of the pipe beam 3.

[0097] Refer to Figure 2 、 Figure 3 、Figure 4 and Figure 5, a deflection detection device for the pipe beam of a maglev transportation system further includes a cleaning assembly 7. The cleaning assembly 7 includes a second telescopic rod 71, a driving rod 72, a brush plate 73, two third telescopic rods 74, a cam 742, no less than one nozzle 743, a fourth telescopic rod 75, a second driven bevel gear 753, a second driving bevel gear 76, a first driving spur gear 77, a second driving spur gear 78, and a synchronous toothed belt 79.The fixed end of the second telescopic rod 71 is fixedly mounted in the sliding housing 41. A second return spring 711 is sleeved on the second telescopic rod 71. One end of the second return spring 711 is fixedly connected to the fixed end of the second telescopic rod 71. The other end of the second return spring 711 is fixedly connected to the movable end of the second telescopic rod 71. The second return spring 711 always applies a force to the movable end of the second telescopic rod 71 away from the fixed end of the second telescopic rod 71. The driving rod 72 is coaxially and rotatably mounted on the movable end of the second telescopic rod 71. The driving rod 72 is passed through and rotatably mounted on the sliding housing 41. The brush plate 73 is fixedly mounted on the end of the driving rod 72 away from the second telescopic rod 71. The brush plate 73 abuts against the pipe beam 3. The brush plate 73 When the locking cam 742 is unlocked, the locking cam 742 is unlocked, and the master lock 73 is unlocked. When the locking cam 742 is unlocked, the master lock 73 is unlocked, and the master lock 73 is unlocked. At least one nozzle 743 is fixedly installed in the give way groove 412, and the nozzle 743 is connected to the rodless cavity of the fixed end of the third telescopic rod 74. The fixed end of the fourth telescopic rod 75 is fixedly installed in the sliding housing 41. A fourth return spring 751 is sleeved on the fourth telescopic rod 75, and one end of the fourth return spring 751 is fixedly connected to the fixed end of the fourth telescopic rod 75, and the other end of the fourth return spring 751 is fixedly connected to the movable end of the fourth telescopic rod 75. The fourth return spring 751 always applies a force to the movable end of the fourth telescopic rod 75 away from the fixed end of the fourth telescopic rod 75. A connecting rod 752 is coaxially and rotatably installed on the movable end of the fourth telescopic rod 75, and a second driven bevel gear 753 is coaxially sleeved and fixedly connected On the connecting rod 752, the second active bevel gear 76 is coaxially sleeved and fixedly connected to one of the output ends of the rolling motor 43, the second active bevel gear 76 is meshed with the second driven bevel gear 753, the first drive spur gear 77 is coaxially sleeved and fixedly mounted on the drive rod 72, the second drive spur gear 78 is coaxially sleeved and fixedly mounted on the connecting rod 752, the thickness of the second drive spur gear 78 is much larger than the length of the fourth telescopic rod 75, the synchronous toothed belt 79 is wound around the first drive spur gear 77 and the second drive spur gear 78, the first drive spur gear 77 and the second drive spur gear 78 are both meshed with the synchronous toothed belt 79 and the second drive spur gear 78 can always mesh with the synchronous toothed belt 79.

[0098] Under the action of the fourth telescopic rod 75 and the fourth return spring 751, the second driving bevel gear 76 is always meshed with the second driven bevel gear 753. When the rolling motor 43 works, the output end rotates. The rotation of the output end of the rolling motor 43 drives the second driving bevel gear 76 to rotate. The rotation of the second driving bevel gear 76 drives the second driven bevel gear 753 to rotate. The rotation of the second driven bevel gear 753 drives the connecting rod 752 to rotate. The rotation of the connecting rod 752 drives the second driving spur gear 78 to rotate. The rotation of the second driving spur gear 78 drives the synchronous toothed belt 79 to move. The movement of the synchronous toothed belt 79 drives the first driving spur gear 77 to rotate. The rotation of the first driving spur gear 77 drives the driving rod 72 to rotate. The rotation of the driving rod 72 drives the brush plate 73 to rotate, so that the brush plate 73 brushes the bottom wall of the pipe beam 3, preventing impurities from adhering to the bottom wall of the pipe beam 3 and thus affecting the measurement accuracy of the deflection of the pipe beam 3.

[0099] Under the action of the third telescopic rod 74 and the third return spring 741, the cam 742 is always in contact with the pipe beam 3. While the sliding housing 41 slides on the pipe beam 3, the cam 742 rotates under the action of friction. The rotation of the cam 742 drives the movable end of the third telescopic rod 74 to reciprocate in the axial direction. When the movable end of the third telescopic rod 74 moves towards the fixed end of the third telescopic rod 74, the movable end of the third telescopic rod 74 squeezes out the cleaning liquid in the rodless cavity of the fixed end of the third telescopic rod 74 and sprays it onto the pipe beam 3 through the nozzle 743, realizing the cleaning of the bottom wall of the pipe beam 3, preventing impurities from adhering to the bottom wall of the pipe beam 3 and thus affecting the measurement accuracy of the deflection of the pipe beam 3.

[0100] The implementation principle of a pipe beam deflection detection device for a maglev transportation system in an embodiment of the present application is as follows: The pipe beam 3 is lifted by two sets of lifting components 5. Then, the position of the support component 4 is adjusted so that the support component 4 is located at the measurement required position. Then, the counterweight component 6 is adjusted so that the counterweight point is located at the measurement required position. Then, the lifting component 5 is adjusted so that the pipe beam 3 is placed on the support component 4, and the measurement component 2 is started to realize the deflection detection of the pipe beam 3. When the deflection detection of the pipe beam 3 is realized through the operation of a pipe beam deflection detection device for a maglev transportation system, the support point can be adjusted, avoiding errors in multi-point measurement and improving the accuracy of the deflection detection result of the pipe beam 3.

[0101] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A deflection detection device for a pipe beam of a maglev transportation system, characterized in that, Comprising: Base (1); Measuring assembly (2), the measuring assembly (2) is slidably mounted on the base (1), and the measuring assembly (2) is used for measuring the deflection of the pipe beam (3); Two groups of support assemblies (4), the two groups of support assemblies (4) are symmetrically arranged on the base (1), and the pipe beam (3) is arranged on the support assembly (4); Two groups of lifting assemblies (5), the two groups of lifting assemblies (5) are symmetrically mounted on the base (1), the lifting assembly (5) is connected to the pipe beam (3), and the lifting assembly (5) is used for lifting the pipe beam (3); Counterweight assembly (6), the counterweight assembly (6) is connected to the lifting assembly (5), and the counterweight assembly (6) is used for applying gravity to the pipe beam (3); Wherein, each of the two groups of support assemblies (4) includes: Sliding housing (41), the sliding housing (41) is slidably mounted on the base (1), the sliding housing (41) abuts against the pipe beam (3), and two abutting blocks (411) are symmetrically and fixedly mounted on the top of the sliding housing (41); First telescopic rod (42), the fixed end of the first telescopic rod (42) is fixedly mounted in the abutting block (411), the movable end of the first telescopic rod (42) is rotatably mounted with a roller (421), the roller (421) abuts against the pipe beam (3), a first return spring (422) is sleeved on the first telescopic rod (42), one end of the first return spring (422) is fixedly connected to the fixed end of the first telescopic rod (42), and the other end of the first return spring (422) is fixedly connected to the movable end of the first telescopic rod (42); Rolling motor (43), the fixed end of the rolling motor (43) is slidably mounted in the sliding housing (41), and the output shaft of the rolling motor (43) is coaxially and fixedly connected to the roller (421).

2. The deflection detection device for the pipe beam of a maglev transportation system according to claim 1, wherein, Each of the two groups of lifting assemblies (5) includes: First housing (51), the first housing (51) is fixedly mounted on the base (1), and two first racks (511) are symmetrically and fixedly mounted in the first housing (51); Lifting motor (52), the fixed end of the lifting motor (52) is fixedly mounted in the first housing (51), the output end of the lifting motor (52) is coaxially and fixedly connected with a rotating rod (521), a first annular electromagnet (522) is coaxially sleeved on the rotating rod (521), the first annular electromagnet (522) can adsorb the rotating rod (521), and a lifting screw (523) is coaxially sleeved on the first annular electromagnet (522); The second housing (53) is inserted through and slidably mounted within the first housing (51). A connecting plate (531) is fixedly mounted on the second housing (53). The lifting screw rod (523) is inserted through and threadedly connected to the connecting plate (531). Two first lifting spur gears (532) are symmetrically and rotatably mounted on the second housing (53). One end of the first lifting spur gear (532) meshes with the first rack (511). Two second racks (533) are symmetrically and fixedly mounted on the inner wall of the second housing (53). The third housing (54) is inserted through and slidably mounted within the second housing (53). Two third racks (541) are symmetrically and fixedly mounted on the outer wall of the third housing (54). The end of the first lifting spur gear (532) remote from the first rack (511) is meshed and connected with the third rack (541). Two second lifting spur gears (542) are symmetrically and rotatably mounted on the third housing (54). One end of the second lifting spur gear (542) meshes with the second rack (533). The fourth housing (55) is inserted through and slidably mounted within the third housing (54). Two fourth racks (551) are symmetrically and fixedly mounted on the outer wall of the fourth housing (55). The end of the second lifting spur gear (542) remote from the second rack (533) meshes with the fourth rack (551). The second annular electromagnet (56) is coaxially sleeved and slidably mounted on the rotating rod (521). A first driving spur gear (561) is coaxially sleeved on the second annular electromagnet (56). The fixing plate (57) is fixedly mounted on the second housing (53). A double-headed screw rod (571) is rotatably mounted on the fixing plate (57). The end of the double-headed screw rod (571) remote from the fixing plate (57) is coaxially sleeved and fixedly connected with a second driving spur gear (572). The second driving spur gear (572) meshes with the first driving spur gear (561). Two clamping plates (58) are symmetrically sleeved and threadedly connected to both ends of the double-headed screw rod (571). Both clamping plates (58) are slidably mounted on the outer side wall of the second housing (53). The clamping plate (58) abuts against the pipe beam (3).

3. The deflection detection device for the pipe beam of a maglev transportation system according to claim 2, characterized in that, The counterweight assembly (6) includes: Two first electromagnetic shafts (65) are symmetrically and fixedly mounted on the two fourth housings (55). Two second electromagnetic shafts (66) are respectively inserted through and rotatably mounted on the two fourth housings (55). A first driven bevel gear (621) is coaxially and fixedly connected to the second electromagnetic shaft (66). The first driven bevel gear (621) is rotatably mounted within the fourth housing (55). A guide rod (61), wherein both ends of the guide rod (61) are coaxially arranged with the two first electromagnetic shafts (65), and the two first electromagnetic shafts (65) are capable of adsorbing the guide rod (61); A conveying screw (62), wherein both ends of the conveying screw (62) are coaxially arranged with two second electromagnetic shafts (66), and the two second electromagnetic shafts (66) are capable of adsorbing the conveying screw (62); a first driving bevel gear (63), the first driving bevel gear (63) being rotatably mounted in the fourth housing (55), the first driving bevel gear (63) being meshedly connected to the first driven bevel gear (621), a third annular electromagnet (631) being passed through and fixedly connected to the first driving bevel gear (63), the third annular electromagnet (631) being coaxially sleeved and slidably mounted on the rotating rod (521); A counterweight block (64) is sleeved and slidably mounted on the guide rod (61), the counterweight block (64) is sleeved and threadedly connected to the conveying screw rod (62), and the counterweight block (64) abuts against the pipe beam (3).

4. A beam deflection detection device for a maglev transportation system according to claim 3, characterized in that, A controller is installed on the base (1), and the rolling motor (43), the lifting motor (52), the first annular electromagnet (522), the second annular electromagnet (56), the third annular electromagnet (631), the first electromagnetic shaft (65) and the second electromagnetic shaft (66) are all electrically connected to the controller.

5. The deflection detection device for the pipe beam of a maglev transportation system according to claim 2, wherein A rubber pad (581) is fixedly mounted on one end of the two clamping plates (58) that is close to each other.

6. The deflection detection device for the pipe beam of a maglev transportation system according to claim 1, characterized in that It also includes a cleaning component (7), which includes: a second telescopic rod (71), wherein a fixed end of the second telescopic rod (71) is fixedly mounted in the sliding housing (41), a second return spring (711) is sleeved on the second telescopic rod (71), one end of the second return spring (711) is fixedly connected to the fixed end of the second telescopic rod (71), and the other end of the second return spring (711) is fixedly connected to the movable end of the second telescopic rod (71); A driving rod (72), the driving rod (72) being coaxially and rotatably mounted on the movable end of the second telescopic rod (71), and the driving rod (72) being passed through and rotatably mounted on the sliding housing (41); A brush plate (73) is fixedly mounted on an end of the driving rod (72) away from the second telescopic rod (71), and the brush plate (73) abuts against the pipe beam (3).

7. The deflection detection device for the pipe beam of a maglev transportation system according to claim 6, characterized in that The sliding housing (41) is provided with a clearance groove (412), and the brush plate (73) can be embedded in the clearance groove (412).

8. The pipe beam deflection detection device for a maglev transportation system according to claim 7, characterized in that, The cleaning component (7) further comprises: Two third telescopic rods (74), the fixed ends of the two third telescopic rods (74) are symmetrically and fixedly installed in the sliding housing (41), the third telescopic rods (74) are sleeved with a third return spring (741), one end of the third return spring (741) is fixedly connected to the fixed end of the third telescopic rod (74), and the other end of the third return spring (741) is fixedly connected to the movable end of the third telescopic rod (74); A cam (742), the cam (742) being rotatably mounted on the movable end of the third telescopic rod (74), the cam (742) being in contact with the pipe beam (3); There are at least one nozzle (743), and at least one nozzle (743) is fixedly installed in the clearance groove (412). The nozzle (743) is connected to the rodless cavity of the fixed end of the third telescopic rod (74).

9. The deflection detection device for the pipe beam of a maglev transportation system according to claim 6, characterized in that, The cleaning component (7) further comprises: a fourth telescopic rod (75), wherein the fixed end of the fourth telescopic rod (75) is fixedly mounted in the sliding housing (41), a fourth return spring (751) is sleeved on the fourth telescopic rod (75), one end of the fourth return spring (751) is fixedly connected to the fixed end of the fourth telescopic rod (75), and the other end of the fourth return spring (751) is fixedly connected to the movable end of the fourth telescopic rod (75), and a connecting rod (752) is coaxially and rotatably mounted on the movable end of the fourth telescopic rod (75); a second driven bevel gear (753), the second driven bevel gear (753) being coaxially sleeved and fixedly connected to the connecting rod (752); a second driving bevel gear (76), the second driving bevel gear (76) being coaxially sleeved and fixedly connected to one of the output ends of the rolling motor (43), the second driving bevel gear (76) being meshedly connected with the second driven bevel gear (753); a first driving spur gear (77), the first driving spur gear (77) being coaxially sleeved and fixedly mounted on the driving rod (72); a second driving spur gear (78), the second driving spur gear (78) being coaxially sleeved and fixedly mounted on the connecting rod (752); A synchronous toothed belt (79) is wound around the first drive spur gear (77) and the second drive spur gear (78), and the first drive spur gear (77) and the second drive spur gear (78) are both meshed and connected with the synchronous toothed belt (79).

10. The magnetic levitation transportation system pipe beam deflection detection device according to claim 8, characterized in that Anti-slip rubber is wound around and fixedly connected to the circumference of the roller (421) and the circumference of the cam (742).

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