Lifting device and lifting method for movement of bolt anti-sliding test piece

Abstract

The invention relates to the technical field of lifting devices, and discloses a lifting device and a lifting method for movement of a bolt anti-slip test specimen, through cooperation of an adjusting assembly and a fixing assembly, after the specimen is fixed by a clamping plate of the fixing assembly, the adjusting assembly enables the fixing assembly to be parallel to the ground, and the fixing assembly is fixed by the clamping plate. When the device transfers the test piece to the position above a universal testing machine, an adjusting rod of an adjusting assembly is rotated, and the rotating adjusting rod changes a fixing assembly in a horizontal state into a vertical state through cooperation of a chain wheel and a chain, so that the test piece is horizontally lifted and placed on the high-strength bolt automatic tester to be tested, and the test piece is transferred to the position above the universal testing machine. The test piece is vertically placed on the universal testing machine to be tested, so that the test piece can be directly converted from a horizontal state to a vertical state after being hoisted, the test piece can be easily and quickly placed, and the test efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lifting devices, in particular to a lifting device and a lifting method for moving a bolt anti-slip test specimen. Background Art

[0002] In the anti-slip test of high-strength bolts, the sensor must be connected first, and the high-strength bolt automatic tester must add torque to the fixed point value. Then, the marking line must be made according to the specification requirements, and the universal testing machine must be used for stretching. The peak value of the slip must be recorded, and finally, the data must be input. The anti-slip coefficient tester automatically calculates the test results. The anti-slip coefficient test uses a double-friction surface two-bolt spliced ​​tensile test piece. Depending on the specifications, the weight can range from 30 to 40 kilograms to over 100 kilograms. It is sometimes difficult to move by manpower, so a lifting device is used to assist the test personnel in moving the test piece. Chinese patent CN110155887B discloses a small lifting device, the lifting component and the handling component of the device can operate separately, which expands the scope of use of the device. However, most of the existing lifting devices lift by hooking heavy objects. When conducting a high-strength bolt anti-slip test, it is necessary not only to place the test piece horizontally on the high-strength bolt automatic tester, but also to place the test piece vertically on the universal testing machine after the high-strength bolt automatic tester completes the test. This requires the test piece to be transformed from a horizontal state to a vertical state in the air after being lifted by the lifting device. When the prior art lifts the test piece by a hook, it is inconvenient for the test piece to be directly transformed from a horizontal state to a vertical state on the hook. It is necessary to complete multiple operations in steps to turn the horizontal test piece into a vertical state, which makes the placement of the test piece during the test very time-consuming and labor-intensive, thereby reducing the test efficiency. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a lifting device and a lifting method for moving a bolt anti-slip test specimen, so as to overcome the above-mentioned technical problems existing in the prior related technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a lifting device and a lifting method for moving a bolt anti-slip test specimen, comprising a main body and a lifting arm installed on the main body, the lifting arm can rotate on the main body, the main body is provided with a driving assembly, a lifting assembly, an adjusting assembly and a fixing assembly, the driving assembly comprises a driving member, the driving member is arranged on the lifting arm, the driving member can move on the lifting arm, the lifting assembly comprises a lifting rod and a lifting motor, the lifting rod and the lifting motor are both installed in the driving member, and the lifting rod cooperates with the lifting motor, and the lifting motor can drive the The lifting rod moves vertically on the driving member to lift the specimen. When the driving member moves, it can synchronously drive the lifting assembly to move. The adjusting assembly includes an adjusting rod, which is installed at the lower end of the lifting rod and can rotate at the lower end of the lifting rod. The fixing assembly includes a connecting plate and a clamping plate. The upper side of the connecting plate cooperates with the adjusting rod. A transmission rod is provided on the connecting plate. The clamping plate is installed at the bottom of the connecting plate and is connected to the transmission rod. Rotating the transmission rod can drive the clamping plate to move at the bottom of the connecting plate to fix the specimen. When the adjusting rod rotates, it can drive the fixing assembly to rotate.

[0005] Preferably, a chain is fixedly connected to the upper side of the connecting plate, and a driving groove and a sliding groove are provided on the lower side of the connecting plate, wherein the driving groove is located in the middle of the connecting plate, and the sliding grooves are distributed on both sides of the driving groove, and a transmission rod is rotatably installed in the driving groove, one end of the transmission rod extends from the driving groove, and the extending end of the transmission rod is a hexagonal bolt head, and threads with opposite spiral directions are respectively provided at both ends of the transmission rod located in the driving groove.

[0006] Preferably, a driving block is fixedly connected to the upper side of the clamping plate, and the driving blocks on the two clamping plates are respectively assembled on the two ends of the transmission rod with threads through threads, and a limiting slider is fixedly connected to the upper side of the clamping plate, and the limiting slider is distributed on both sides of the driving block. The limiting slider is slidably installed in the sliding groove, and the side of the clamping plate is equipped with fixing bolts, and the fixing bolts can be connected to the specimen.

[0007] Preferably, a driving box is fixedly installed on one side of the upper side of the driving member, a driving motor is fixedly installed in the driving box, a transmission gear is coaxially fixedly connected to the output shaft of the driving motor, and a roller is also rotatably connected to the upper side of the driving member, wherein the rollers near the two sides of the transmission gear are also coaxially fixedly connected with driven gears, the driven gears are meshed with the transmission gears, and the transmission gears can drive the rollers to rotate when they rotate, and a lifting box is fixedly installed on the lower side of the driving member.

[0008] Preferably, the lifting rod slides through the driving member and the lifting box, a driving rack is fixedly connected to the lifting rod, two protrusions are fixedly connected to the lifting rod, the two protrusions are respectively located at the upper and lower ends of the driving rack, and a rotating sleeve is fixedly connected to the lower end of the lifting rod.

[0009] Preferably, the lifting motor is fixedly installed in the lifting box, and a driving gear is coaxially fixedly connected to the output shaft of the lifting motor, and the driving gear is meshed with the driving rack.

[0010] Preferably, the adjusting rod is rotatably installed in the rotating sleeve, and the two ends of the adjusting rod extend from the two ends of the rotating sleeve respectively. A sprocket, a protective plate and a handwheel are sequentially arranged on the protruding ends of the adjusting rod. The sprocket is coaxially fixedly connected to the adjusting rod, and the chain is fitted on the sprocket. Initially, the sprocket is located in the middle section of the chain, driving the fixed assembly to be in a horizontal state. The protective plate and the handwheel are fixedly connected to the adjusting rod, and the protective plate separates the sprocket and the handwheel, so that the adjusting rod can be rotated by the handwheel.

[0011] Preferably, the main body includes a vertical pole, the upper end of the vertical pole is rotatably connected to the boom, a slot is provided on the boom, the slot passes through the upper and lower sides of the boom, the upper end of the boom initially extends out of the slot, the protrusion at the upper end of the boom is located above the slot, a slide is provided on the side of the boom, the roller is assembled in the slide, and the roller can move in the slide when it rotates.

[0012] Preferably, a travel switch is fixedly installed on the upper side of the movable part and the bottom of the lifting box, the travel switch is connected to the lifting motor through an electrical signal, and the travel switch on the upper side of the movable part is located in the slot, and the two travel switches respectively correspond to the protrusions distributed at the upper and lower ends of the lifting rod.

[0013] Preferably, a lifting method for moving a bolt anti-slip test specimen uses a lifting device.

[0014] Compared with the prior art, the present invention provides a lifting device and a lifting method for moving a bolt anti-slip test specimen, which has the following beneficial effects: 1. The lifting device and the lifting method for moving the bolt anti-slip test specimen, through the cooperation of the adjusting component and the fixing component, after the clamping plate of the fixing component fixes the specimen, the adjusting component makes the fixing component parallel to the ground, so that the lifting rod can lift the specimen horizontally and place it on the high-strength bolt automatic tester for testing. When the device transfers the specimen to the top of the universal testing machine, by rotating the adjusting rod of the adjusting component, the rotating adjusting rod transforms the horizontal state of the fixing component into a vertical state through the cooperation of the sprocket and the chain, so that the specimen is vertically placed on the universal testing machine for testing, so that the specimen can directly realize the transformation from the horizontal state to the vertical state after being lifted, so that the placement of the specimen is easy and fast, thereby improving the test efficiency.

[0015] 2. The lifting device and the lifting method for moving the bolt anti-slip test specimen are arranged through a lifting component and a driving component. During the lifting process, when the lifting motor drives the lifting rod to rise or fall to a certain height, the protrusion on the lifting rod will trigger the corresponding travel switch, so that the lifting motor can be turned off in time, avoiding accidents caused by excessive movement of the lifting rod, ensuring the normal operation of the device, and during the test, when the fixed component needs to be away from the specimen, the driving component drives the lifting component to move on the boom, thereby moving the fixed component away from the specimen under test, avoiding its influence on the test, and ensuring the normal progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 for Figure 1 A local enlarged structural schematic diagram; Figure 3 It is a schematic diagram of the side structure of the fixing assembly of the present invention; Figure 4 It is a schematic diagram of the internal structure of the drive box and the notch of the present invention; Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at B; Figure 6 It is a schematic diagram of the internal structure of the lifting box of the present invention; Figure 7 It is a structural schematic diagram of the present invention when the test piece is not hoisted; Figure 8 It is a schematic diagram of the positions of the components of the fixing assembly of the present invention and the internal structure of the driving slot.

[0017] In the figure: 1. main body; 11. vertical pole; 2. boom; 21. notch; 22. slide; 3. drive assembly; 31. drive member; 32. drive box; 33. drive motor; 34. transmission gear; 35. roller; 36. driven gear; 37. lifting box; 4. travel switch; 5. lifting assembly; 51. lifting rod; 52. driving rack; 53. bump; 54. rotating sleeve; 55. lifting motor; 56. driving gear; 6. adjusting assembly; 61. adjusting rod; 62. sprocket; 63. protective plate; 64. handwheel; 7. fixing assembly; 71. connecting plate; 72. chain; 73. driving groove; 74. sliding groove; 75. transmission rod; 76. clamping plate; 761. driving block; 762. limiting slider; 77. fixing bolt; 8. test piece. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 8 A lifting device and a lifting method for moving a bolt anti-slip test specimen 8, comprising a main body 1 and a lifting arm 2 installed on the main body 1, the lifting arm 2 can rotate on the main body 1, characterized in that: the main body 1 is provided with a driving assembly 3, a lifting assembly 5, an adjusting assembly 6 and a fixing assembly 7, the driving assembly 3 includes a driving member 31, the driving member 31 is arranged on the lifting arm 2, the driving member 31 can move on the lifting arm 2, the lifting assembly 5 includes a lifting rod 51 and a lifting motor 55, the lifting rod 51 and the lifting motor 55 are both installed in the driving member 31, and the lifting rod 51 cooperates with the lifting motor 55, and the lifting motor 55 can drive the lifting rod 51 to move on the driving member 3 1 to lift the specimen 8. When the driving member 31 moves, it can synchronously drive the lifting assembly 5 to move. The adjusting assembly 6 includes an adjusting rod 61, which is installed at the lower end of the lifting rod 51. The adjusting rod 61 can rotate at the lower end of the lifting rod 51. The fixing assembly 7 includes a connecting plate 71 and a clamping plate 76. The upper side of the connecting plate 71 cooperates with the adjusting rod 61. A transmission rod 75 is provided on the connecting plate 71. The clamping plate 76 is installed at the bottom of the connecting plate 71 and is connected to the transmission rod 75. Rotating the transmission rod 75 can drive the clamping plate 76 to move at the bottom of the connecting plate 71 to fix the specimen 8. When the adjusting rod 61 rotates, the fixing assembly 7 can be driven to rotate.

[0020] Among them, when in use, the device is installed between the high-strength bolt automatic tester and the universal testing machine. When conducting the test, first place the test piece 8 to be used in the test under the fixing assembly 7, and drive the clamping plate 76 to move to both sides of the connecting plate 71 by rotating the transmission rod 75 in the opposite direction, so that the spacing between the opened clamping plates 76 matches the width of the test piece 8 below, and then the lifting motor 55 of the lifting assembly 5 drives the lifting rod 51 to descend. After the lifting rod 51 places the clamping plate 76 on the test piece 8, the lifting motor 55 stops running to end the descent of the lifting rod 51. At this time, the test piece 8 is located in the opened clamping plate 76, and then the transmission rod 75 is rotated forward to drive the clamping plate 76 to approach the test piece 8, so that the test piece 8 is clamped and fixed. After the plate 76 fixes the test piece 8, the transmission rod 75 is stopped from rotating, and the lifting motor 55 is started to drive the lifting rod 51 to rise, so as to lift the test piece 8. During this process, the adjustment component 6 is always in the initial state. At this time, the connecting plate 71 is horizontal, so that the lifted test piece 8 is kept parallel to the ground. After the lifting rod 51 lifts the test piece 8, the boom 2 rotates in the direction of the high-strength bolt automatic tester to send the test piece 8 to the top of the high-strength bolt automatic tester. Then the lifting motor 55 drives the lifting rod 51 to descend and places the test piece 8 on the high-strength bolt automatic tester. After placing the test piece 8, the clamping plate 76 is driven to open by rotating the transmission rod 75 in the opposite direction. After the clamping plate 76 releases the test piece 8, the lifting motor 55 lifts the lifting rod 51. After the high-strength bolt automatic tester completes the test, the lifting motor 55 lowers the lifting rod 51 again, and the clamping plate 76 clamps and fixes the test piece 8 again. After the test piece 8 is fixed, the lifting motor 55 drives the lifting rod 51 to lift the test piece 8, and the boom 2 rotates to the top of the universal testing machine. At this time, by rotating the adjusting rod 61 in the opposite direction, the connecting plate 71 drives the clamping plate 76 and the test piece 8 thereon to rotate from a horizontal state to a vertical state. After the connecting plate 71 rotates 90 degrees, the adjusting rod 61 stops rotating. At this time, the lifted test piece 8 is perpendicular to the ground. Subsequently, the lifting motor 55 places the vertical test piece 8 on the universal testing machine through the lifting rod 51. After the test piece 8 is placed, the driving member 31 of the driving assembly 3 drives the fixing assembly 7 away from the test piece 8. After the universal testing machine completes the test, the driving member 31 drives the fixing assembly 7 to approach the test piece 8, so that the clamping plate 76 of the fixing assembly 7 clamps and fixes the test piece 8 again, and then the lifting motor 55 lifts the test piece 8 on the universal testing machine through the lifting rod 51. After lifting the test piece 8, the adjusting rod 61 is rotated forward so that the connecting plate 71 drives the clamping plate and the test piece thereon to rotate from a vertical state to a horizontal state. After the connecting plate 71 rotates 90 degrees in the opposite direction, the adjusting rod 61 is stopped. At this time, the lifted test piece 8 is parallel to the ground again, and then the boom 2 is rotated to move the test piece 8 away from the top of the universal testing machine. After the test piece 8 is located above the open space, the lifting motor 55 puts the test piece 8 back to the ground through the lifting rod 51, thereby completing a test.

[0021] The difference from the above embodiment is that a chain 72 is fixedly connected to the upper side of the connecting plate 71, and a driving groove 73 and a sliding groove 74 are provided on the lower side of the connecting plate 71. The driving groove 73 is located in the middle of the connecting plate 71, and the sliding grooves 74 are distributed on both sides of the driving groove 73. A transmission rod 75 is rotatably installed in the driving groove 73, and one end of the transmission rod 75 extends out from the driving groove 73. The protruding end of the transmission rod 75 is a hexagonal bolt head, and the two ends of the transmission rod 75 located in the driving groove 73 are respectively provided with threads with opposite spiral directions.

[0022] When the transmission rod 75 needs to be rotated, a socket wrench is used to connect with the bolt head of the transmission rod 75, and then the transmission rod 75 is driven by the socket wrench to rotate forward and reverse. After the rotation is completed, the socket wrench is removed.

[0023] The difference from the above-mentioned embodiment lies in that a driving block 761 is fixedly connected to the upper side of the clamping plate 76, and the driving blocks 761 on the two clamping plates 76 are respectively assembled on the two ends of the transmission rod 75 with threads through threads, and a limiting slider 762 is fixedly connected to the upper side of the clamping plate 76, and the limiting slider 762 is distributed on both sides of the driving block 761. The limiting slider 762 is slidably installed in the sliding groove 74, and the side of the clamping plate 76 is equipped with a fixing bolt 77, which can be connected to the specimen 8.

[0024] When the test piece 8 needs to be fixed, the transmission rod 75 is rotated forward, and the driving blocks 761 engaged with the threaded sections at both ends of the transmission rod 75 will move toward the middle of the driving groove 73, so that the clamping plate 76, under the cooperation of the limiting slider 762 and the sliding groove 74, approaches the test piece 8, thereby clamping and fixing the test piece 8, and a corresponding screw hole will be opened on the test piece 8. After the clamping plate 76 clamps the test piece 8, the fixing bolt 77 is screwed into the screw hole on the test piece 8 to further strengthen the fixation of the fixing assembly 7 to the test piece 8. When the test piece 8 needs to be released, the fixing bolt 77 needs to be screwed out from the screw hole of the test piece 8 first, and then the transmission rod 75 is rotated reversely, and the driving blocks 761 engaged with the threaded sections at both ends of the transmission rod 75 will move to the two sides of the driving groove 73, so that the clamping plate 76 is away from the test piece 8 under the cooperation of the limiting slider 762 and the sliding groove 74, thereby releasing the test piece 8.

[0025] The difference from the above-mentioned embodiment lies in that a driving box 32 is fixedly installed on one side of the upper side of the driving member 31, a driving motor 33 is fixedly installed in the driving box 32, a transmission gear 34 is coaxially fixedly connected to the output shaft of the driving motor 33, a roller 35 is also rotatably connected to the upper side of the driving member 31, wherein the rollers 35 near the two sides of the transmission gear 34 are also coaxially fixedly connected with driven gears 36, the driven gears 36 are meshed with the transmission gears, and the transmission gears 34 can drive the rollers 35 to rotate when they rotate, and a lifting box 37 is fixedly installed on the lower side of the driving member 31.

[0026] When the driving assembly 3 is started, the driving motor 33 drives the driven gears 36 on both sides to rotate in the same direction through the transmission gear 34, driving the roller 35 connected to the driven gear 36 to rotate, so that the driving member 31 performs linear motion on the boom 2.

[0027] The difference from the above embodiment is that the lifting rod 51 slides through the driving member 31 and the lifting box 37, and a driving rack 52 is fixedly connected to the lifting rod 51. Two protrusions 53 are fixedly connected to the lifting rod 51, and the two protrusions 53 are respectively located at the upper and lower ends of the driving rack 52. A rotating sleeve 54 is fixedly connected to the lower end of the lifting rod 51.

[0028] The difference from the above-mentioned embodiment is that the lifting motor 55 is fixedly installed in the lifting box, and a driving gear 56 is coaxially fixedly connected to the output shaft of the lifting motor 55 , and the driving gear 56 is meshed with the driving rack 52 .

[0029] When the lifting rod 51 needs to be raised, the lifting motor 55 drives the driving gear 56 on its output shaft to rotate forward, and the rotating driving gear 56 drives the lifting rod 51 to move upward by driving the rack 52. When the lifting rod 51 needs to be lowered, the lifting motor 55 drives the driving gear 56 on its output shaft to rotate reversely, and the rotating driving gear 56 drives the lifting rod 51 to move downward by driving the rack 52.

[0030] The difference from the above embodiment is that the adjusting rod 61 is rotatably installed in the rotating sleeve 54, and the two ends of the adjusting rod 61 extend from the two ends of the rotating sleeve 54 respectively. The protruding end of the adjusting rod 61 is sequentially provided with a sprocket 62, a protective plate 63 and a handwheel 64. The sprocket 62 is coaxially fixedly connected to the adjusting rod 61, and the chain 72 is matched on the sprocket 62. Initially, the sprocket 62 is located in the middle section of the chain 72, driving the fixed component 7 to be in a horizontal state, the protective plate 63 and the handwheel 64 are fixedly connected to the adjusting rod 61, and the protective plate 63 separates the sprocket 62 and the handwheel 64. The adjusting rod 61 can be rotated by the handwheel 64.

[0031] When the fixing assembly 7 needs to be turned from a horizontal state to a vertical state, the adjusting rod 61 is rotated in the opposite direction by the hand wheel 64, and the adjusting rod 61 drives the chain 72 of the connecting plate 71 to move through the sprocket 62, so that the chain 72 at one end of the connecting plate 71 gradually shortens, and the chain 72 at the other end gradually lengthens, and the shortened end of the chain 72 on the connecting plate 71 gradually moves upward, while the increased end of the chain 72 on the connecting plate 71 gradually moves downward, thereby transforming the horizontal fixing assembly 7 into a vertical state. When the fixing assembly 7 needs to be turned back to a horizontal state from a vertical state, the adjusting rod 61 is rotated forward by the hand wheel 64, and the adjusting rod 61 drives the connecting plate 71 through the sprocket 62. The movement of chain 72 causes chain 72 on the downward end of connecting plate 71 to move upward and begin to gradually shorten, while chain 72 on the upward end of connecting plate 71 moves downward and begins to gradually increase, causing the downward end of connecting plate 71 to start to move upward, while the upward end of connecting plate 71 starts to move downward, thereby transforming the vertical fixed assembly 7 into a horizontal state. When the fixed assembly 7 returns to the horizontal state, the lengths of chains 72 at both ends of the connecting plate 71 are equal. At this time, the sprocket 62 is in the middle section of the chain 72. The setting of the protective plate 63 prevents the sprocket 62 and chain 72 from being accidentally touched when the hand wheel 64 is manually turned, thereby ensuring the personal safety of the staff.

[0032] The difference from the above embodiment is that the main body 1 includes a vertical rod 11, the upper end of the vertical rod 11 is rotatably connected to the boom 2, a slot 21 is provided on the boom 2, the slot 21 passes through the upper and lower sides of the boom 2, the upper end of the boom initially extends out of the slot 21, the protrusion 53 at the upper end of the boom is located above the slot 21, a slide 22 is provided on the side of the boom 2, a roller 35 is assembled in the slide 22, and the roller 35 can move in the slide when it rotates.

[0033] When the driving motor 33 is started, the roller 35 drives the driving member 31 to move on the boom 2 by rotating in the slideway 22 .

[0034] The difference from the above embodiment is that a travel switch 4 is fixedly installed on the upper side of the moving part and the bottom of the lifting box 37, the travel switch 4 is connected to the lifting motor 55 through an electrical signal, and the travel switch 4 on the upper side of the moving part is located in the slot 21, and the two travel switches 4 correspond to the protrusions 53 distributed at the upper and lower ends of the lifting rod 51 respectively.

[0035] Among them, when the lifting rod 51 descends to a certain height, the protrusion 53 at the upper end of the lifting rod 51 will trigger the travel switch 4 in the slot 21, and the triggered travel switch 4 will turn off the lifting motor 55 through an electrical signal, thereby stopping the lifting rod 51 from descending. When the lifting rod 51 rises to a certain height, the protrusion 53 at the lower end of the lifting rod 51 will trigger the travel switch 4 at the bottom of the lifting box 37, and the triggered travel switch 4 will turn off the lifting motor 55 through an electrical signal, thereby stopping the lifting rod 51 from rising. By setting the travel switch 4, accidents caused by excessive movement of the lifting rod 51 can be avoided.

[0036] The difference from the above-mentioned embodiment is that a lifting method for moving a bolt anti-slip test specimen uses a lifting device.

[0037] Working principle: When in use, the device is installed between the high-strength bolt automatic tester and the universal testing machine. When conducting the test, first place the test piece 8 to be used in the test under the fixing assembly 7, use a socket wrench to connect the bolt head of the transmission rod 75, and rotate the transmission rod 75 in the opposite direction to drive the clamping plate 76 to move to both sides of the connecting plate 71, so that the spacing between the opened clamping plates 76 matches the width of the test piece 8 below, and then the lifting motor 55 of the lifting assembly 5 drives the lifting rod 51 to descend, and After the lifting rod 51 places the clamping plate 76 on the test piece 8, the lifting motor 55 stops running to end the descent of the lifting rod 51. At this time, the test piece 8 is located in the opened clamping plate 76. The transmission rod 75 is then rotated forward by the socket wrench to drive the clamping plate 76 to approach the test piece 8, thereby clamping and fixing the test piece 8. The fixing bolt 77 is screwed into the screw hole on the test piece 8 to further strengthen the fixing of the fixing assembly 7 to the test piece 8. After the clamping plate 76 fixes the test piece 8, the transmission rod 75 is stopped from rotating and the socket wrench is removed. , start the lifting motor 55 to drive the lifting rod 51 to rise and lift the test piece 8. During this process, the adjustment component 6 is always in the initial state. At this time, the connecting plate 71 is horizontal, so that the lifted test piece 8 is kept parallel to the ground. After the lifting rod 51 lifts the test piece 8, the boom 2 rotates in the direction of the high-strength bolt automatic tester to send the test piece 8 to the top of the high-strength bolt automatic tester. Then the lifting motor 55 drives the lifting rod 51 to descend, and the test piece 8 is placed on the high-strength bolt automatic tester. After the test piece 8 is placed, the fixing bolt 77 is screwed out from the screw hole of the test piece 8, and the clamping plate 76 is driven to open by rotating the transmission rod 75 in the opposite direction. After the clamping plate 76 releases the test piece 8, the lifting motor 55 raises the lifting rod 51, and the driving member 31 of the driving assembly 3 drives the fixing assembly 7 away from the test piece 8. After the high-strength bolt automatic tester completes the test, the driving assembly 3 sends the fixing assembly 7 back to the top of the test piece 8, and the lifting motor 55 lowers the lifting rod 51 again, and the clamping plate 76 clamps and fixes the test piece 8 again. After the test piece 8 is fixed, the lifting motor 55 drives the lifting rod 51 to lift the test piece 8, and the arm 2 is rotated to the top of the universal testing machine. At this time, the adjusting rod 61 is rotated in the opposite direction through the hand wheel 64, and the adjusting rod 61 drives the chain 72 of the connecting plate 71 to move through the sprocket 62, so that the chain 72 at one end of the connecting plate 71 gradually shortens, and the chain 72 at the other end gradually lengthens, and the shortened end of the chain 72 on the connecting plate 71 gradually moves upward, while the extended end of the chain 72 on the connecting plate 71 gradually moves downward, thereby transforming the horizontal fixing component 7 into a vertical state, and then the lifting motor 55 moves the vertical fixed component 7 into a vertical state through the lifting rod 51. The test piece 8 is placed on the universal testing machine. After the test piece 8 is placed, the driving member 31 of the driving member 3 drives the fixing member 7 to move away from the test piece 8. After the universal testing machine completes the test, the driving member 31 drives the fixing member 7 to approach the test piece 8, so that the clamping plate 76 of the fixing member 7 clamps and fixes the test piece 8 again. Then, the lifting motor 55 lifts the test piece 8 on the universal testing machine through the lifting rod 51. After the test piece 8 is lifted, the adjusting rod 61 is rotated forwardly through the hand wheel 64. The adjusting rod 61 drives the chain 72 of the connecting plate 71 to move through the sprocket 62, so that the chain 72 on the downward end of the connecting plate 71 moves upward, and the test piece 8 is lifted. The chain 72 on the upward end of the connecting plate 71 moves downward and begins to gradually increase, so that the downward end of the connecting plate 71 begins to move upward, while the upward end of the connecting plate 71 begins to move downward, thereby transforming the vertical fixing assembly 7 into a horizontal state. When the fixing assembly 7 returns to the horizontal state, the lengths of the chains 72 at both ends of the connecting plate 71 are equal. At this time, the sprocket 62 is in the middle section of the chain 72. The rotation of the adjusting rod 61 is stopped, and then the boom 2 rotates to move the test piece 8 away from the top of the universal testing machine. After the test piece 8 is located above the open space, the lifting motor 55 puts the test piece 8 back to the top through the lifting rod 51 On the ground, a test is completed, wherein, when the lifting rod 51 descends to a certain height, the protrusion 53 at the upper end of the lifting rod 51 will trigger the travel switch 4 in the slot 21, and the triggered travel switch 4 will turn off the lifting motor 55 through an electrical signal, thereby stopping the lifting rod 51 from descending; when the lifting rod 51 rises to a certain height, the protrusion 53 at the lower end of the lifting rod 51 will trigger the travel switch 4 at the bottom of the lifting box 37, and the triggered travel switch 4 will turn off the lifting motor 55 through an electrical signal, thereby stopping the lifting rod 51 from rising; by setting the travel switch 4, accidents caused by excessive movement of the lifting rod 51 are avoided.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting device, comprising a main body and a lifting arm mounted on the main body, wherein the lifting arm can rotate on the main body, and wherein: The main body is provided with a driving assembly, a lifting assembly, an adjusting assembly and a fixing assembly, the driving assembly includes a driving member, the driving member is arranged on the boom, the driving member can move on the boom, the lifting assembly includes a lifting rod and a lifting motor, the lifting rod and the lifting motor are both installed in the driving member, and the lifting rod cooperates with the lifting motor, the lifting motor can drive the lifting rod to move in a vertical direction on the driving member to lift the specimen, and the driving member can synchronously drive the lifting assembly to move when it moves, the adjusting assembly includes an adjusting rod, the adjusting rod is installed at the lower end of the lifting rod, the adjusting rod can rotate at the lower end of the lifting rod, the fixing assembly includes a connecting plate and a clamping plate, the upper side of the connecting plate cooperates with the adjusting rod, a transmission rod is arranged on the connecting plate, the clamping plate is installed at the bottom of the connecting plate and is connected to the transmission rod, rotating the transmission rod can drive the clamping plate to move at the bottom of the connecting plate to fix the specimen, and the fixing assembly can be driven to rotate when the adjusting rod rotates.

2. A lifting device according to claim 1, characterized in that: A chain is fixedly connected to the upper side of the connecting plate, and a driving groove and a sliding groove are provided on the lower side of the connecting plate. The driving groove is located in the middle of the connecting plate, and the sliding grooves are distributed on both sides of the driving groove. A transmission rod is rotatably installed in the driving groove, and one end of the transmission rod extends out from the driving groove. The extended end of the transmission rod is a hexagonal bolt head, and both ends of the transmission rod located in the driving groove are respectively provided with threads with opposite spiral directions.

3. A lifting device according to claim 2, characterized in that: A driving block is fixedly connected to the upper side of the clamping plate, and the driving blocks on the two clamping plates are respectively assembled on the two ends of the transmission rod with threads through threads. A limiting slider is fixedly connected to the upper side of the clamping plate, and the limiting slider is distributed on both sides of the driving block. The limiting slider is slidably installed in the sliding groove, and the side of the clamping plate is equipped with fixing bolts, and the fixing bolts can be connected to the specimen.

4. A lifting device according to claim 3, characterized in that: A driving box is fixedly installed on one side of the upper side of the driving member, and a driving motor is fixedly installed in the driving box. A transmission gear is coaxially fixedly connected to the output shaft of the driving motor. A roller is also rotatably connected to the upper side of the driving member, and a driven gear is coaxially fixedly connected to the rollers on both sides of the transmission gear. The driven gear is meshed with the transmission gear, and the transmission gear can drive the roller to rotate when it rotates. A lifting box is fixedly installed on the lower side of the driving member.

5. A lifting device according to claim 4, characterized in that: The lifting rod slides through the driving member and the lifting box, a driving rack is fixedly connected to the lifting rod, two protrusions are fixedly connected to the lifting rod, the two protrusions are respectively located at the upper and lower ends of the driving rack, and a rotating sleeve is connected to the lower end of the lifting rod.

6. A lifting device according to claim 5, characterized in that: The lifting motor is fixedly installed in the lifting box, and a driving gear is coaxially fixedly connected to the output shaft of the lifting motor, and the driving gear is meshed with the driving rack.

7. A lifting device according to claim 6, characterized in that: The adjusting rod is rotatably installed in the rotating sleeve, and the two ends of the adjusting rod extend out from the two ends of the rotating sleeve respectively. A sprocket, a protective plate and a handwheel are sequentially arranged on the extended end of the adjusting rod. The sprocket is coaxially fixedly connected to the adjusting rod, and the chain is fitted on the sprocket. Initially, the sprocket is located in the middle section of the chain, driving the fixed assembly to be in a horizontal state. The protective plate and the handwheel are fixedly connected to the adjusting rod. The protective plate separates the sprocket and the handwheel, and the adjusting rod can be rotated by the handwheel.

8. A lifting device according to claim 5, characterized in that: The main body includes a vertical pole, the upper end of which is rotatably connected to the boom, a slot is provided on the boom, and the slot runs through the upper and lower sides of the boom. Initially, the upper end of the boom extends out of the slot, and the protrusion at the upper end of the boom is located above the slot. A slide is provided on the side of the boom, and the roller is assembled in the slide. When the roller rotates, it can move in the slide.

9. A lifting device according to claim 8, characterized in that: A travel switch is fixedly installed on the upper side of the moving part and the bottom of the lifting box. The travel switch is connected to the lifting motor through an electrical signal, and the travel switch on the upper side of the moving part is located in the slot. The two travel switches correspond to the protrusions distributed at the upper and lower ends of the lifting rod respectively.

10. A lifting method for moving a bolt anti-slip test specimen, characterized in that: A lifting device as described in any one of claims 1 to 9 is used.

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