An excavator arm tensile strength testing device

Abstract

The present invention relates to the technical field of excavator production, and particularly to a tensile strength testing device for an excavator boom, which includes a base and support plates symmetrically and fixedly connected to both side surfaces of the base. Electric guiding rollers are evenly spaced and installed between the support plates on the same side for driving the boom to move. A human-machine interaction display screen is installed on the base. In the present invention, first, the boom is driven by the electric guiding rollers to move backward onto the driving roller, and the driving roller drives the boom to move backward between the upper and lower clamping plates. Subsequently, the electric screw rod is started to drive the clamping plates to clamp the boom. Then, the conical rod is inserted into the connection hole of the boom through the cylinder I and the double-shaft motor. The movement of the clamping plates can pull the entire boom to complete the tensile strength test, and the movement of the conical rod can test the tensile strength of the connection hole of the boom. In this way, the tensile strength tests of the entire boom and the connection hole position are completed simultaneously, and the test is comprehensive, thereby improving the test effect.

Description

Technical Field

[0001] The present invention relates to the technical field of excavator production, and particularly relates to a tensile strength testing device for an excavator boom. Background Art

[0002] During the production process of an excavator, a boom is required to connect the bucket. After the boom is produced, in order to ensure the service quality of the boom, it is necessary to detect the tensile strength of the boom.

[0003] Chinese Patent with the publication number CN114034561A discloses a tensile strength detection device for an excavator boom, which relates to the technical field of excavator detection. The bottom end of the guide post is connected to the base, the fixing plate is connected to the top end of the guide post, the movable plate is slidably arranged on the guide post and is located between the base and the fixing plate. The lifting drive device can drive the movable plate to slide along the guide post. The upper fixture assembly is arranged at the bottom end of the movable plate, the lower fixture assembly is arranged at the top end of the base and is arranged corresponding to the upper fixture assembly. The top end of the telescopic heating box is connected to the bottom end of the movable plate, the bottom end of the telescopic heating box is connected to the top end of the base, and the telescopic heating box can expand and contract with the lifting of the movable plate. The clamping ends of the upper fixture assembly and the lower fixture assembly are both arranged inside the telescopic heating box, and a heating device and a temperature sensing device are arranged inside the telescopic heating box. Although the above patent can test the tensile strength of the boom, it can only clamp the whole boom through the fixture to test the tensile strength. However, the connecting hole position of the boom is also the stressed part during actual use, and the tensile strength of the connecting hole position of the boom cannot be tested, resulting in incomplete testing and affecting the testing effect.

[0004] The present invention aims to solve the problems existing in the above patent. Therefore, a tensile strength testing device for an excavator boom is proposed, which can simultaneously test the tensile strength of the whole boom and the connecting hole position, with comprehensive testing and improved testing effect. Summary of the Invention

[0005] In order to overcome the disadvantages that although the above patent can test the tensile strength of the boom, it can only clamp the whole boom through the fixture to test the tensile strength, and the connecting hole position of the boom is also the stressed part during actual use, and the tensile strength of the connecting hole position of the boom cannot be tested, resulting in incomplete testing and affecting the testing effect, the present invention provides a tensile strength testing device for an excavator boom, which can simultaneously test the tensile strength of the whole boom and the connecting hole position, with comprehensive testing and improved testing effect.

[0006] The present invention is realized through the following technical solutions:

[0007] An excavator boom tensile strength testing device includes a base and support plates symmetrically fixed on both sides of the base. Electric guiding rollers are evenly spaced and installed between the support plates on the same side to drive the boom to move. A human-machine interaction display screen is installed on the base to display test data and adjust test parameters. Sliding seats are slidably connected to both the left and right sides of the base. Clamping plates are slidably connected to the sliding seats. Electric screw rods are installed on the sliding seats. The threads on the upper and lower sides of the electric screw rods are opposite. The electric screw rods are threadedly connected to the clamping plates. Electric push rods are fixedly connected to both the left and right sides of the base. The end of the telescopic rod of the electric push rod is fixedly connected to the sliding seat. It also includes a driving component, a movable seat, a fixing plate, a tapered rod, a connecting plate, a screw rod, a double-shaft motor, a lifting component, and a positioning component. The lifting component is installed on the base to drive the boom to move downward. The number of movable seats is two. Fixing plates are symmetrically fixed on the movable seats. Tapered rods are vertically slidably connected to the fixing plates. A connecting plate is fixedly connected to the end of the tapered rod. A double-shaft motor is installed on the movable seat. The end of the output shaft of the double-shaft motor is fixedly connected to a screw rod. The threads of the upper and lower screw rods are opposite. The screw rod is threadedly connected to the connecting plate. The driving component is installed on the base. The driving component is used to drive the movable seat to move so that the tapered rod moves to correspond to the connection hole of the boom. Then, the double-shaft motor is started to drive the screw rod to rotate. The screw rod drives the tapered rod to move and insert into the connection hole of the boom through the connecting plate. The driving component is started again to make the fixing plate drive the tapered rods on both sides to pull the boom so as to test the tensile strength of the connection hole of the boom by the tapered rod. The positioning component is installed on the base to position the boom.

[0008] Further explanation, the driving component includes U-shaped plates symmetrically slidably connected to the inner side of the base. An N-shaped seat fixedly connected to the U-shaped plate and slidably connected to the base is provided. The N-shaped seat is slidably connected to the movable seat. A connecting spring is connected between the N-shaped seat and the movable seat. Cylinders I are symmetrically fixedly connected to the base. The end of the telescopic rod of the cylinder I is fixedly connected to the N-shaped seat.

[0009] Further explanation, the lifting component includes a support frame fixedly connected to the top of the base. The support frame is located between the electric guiding rollers on the front and rear sides. A lifting frame is slidably connected between the inner side of the support frame and the base. Driving rollers are evenly spaced and rotatably connected to the lifting frame. The adjacent driving rollers are driven by a synchronous belt assembly. A servo motor is installed on the lifting frame. The servo motor and one of the driving rollers are driven by a synchronous belt assembly. A cylinder II is embedded and fixedly connected to the base. The end of the telescopic rod of the cylinder II is fixedly connected to the lifting frame.

[0010] Further explanation, the positioning component includes rotating shafts rotatably connected to the left and right sides of the top of the base. Positioning rods are fixedly sleeved at the ends of the rotating shafts. The positioning rods are located on both sides of the support frame to position the boom. A rotating component is provided between the lifting frame and the rotating shaft to drive the rotating shaft to rotate.

[0011] Further explanation, the rotating assembly includes a spur gear fixedly sleeved on the end of the rotating shaft. Rack bars meshing with the spur gear are fixedly connected to the left and right sides of the outer surface of the lifting frame to drive the spur gear to rotate.

[0012] Further explanation, the tensile strength testing equipment for the excavator boom further includes a deviation correction assembly. The deviation correction assembly includes a movable plate slidably connected to the front left and right support plates. A positioning plate is fixedly connected to the movable plate. The front side of the positioning plate is inclined to center the boom. A reciprocating lead screw is fixedly connected to the end of the frontmost electric guide roller. The reciprocating lead screw is threadedly connected to the movable plate to drive the movable plate to reciprocate.

[0013] Further explanation, the tensile strength testing equipment for the excavator boom further includes a protective shell fixedly connected to the top of the base. The protective shell is located directly above the driving roller to block the debris ejected during the testing process.

[0014] Further explanation, the tensile strength testing equipment for the excavator boom further includes a rubber sleeve fixedly sleeved on the positioning rod to protect the boom.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. First, the electric guide roller drives the boom to move backward onto the driving roller. The driving roller drives the boom to move backward between the upper and lower clamping plates. Then, the electric lead screw is started to drive the clamping plates to clamp the boom. Subsequently, the conical rod is inserted into the connection hole of the boom through the cylinder I and the double-shaft motor. The movement of the clamping plates can pull the entire boom to complete the tensile strength test, and the movement of the conical rod can test the tensile strength of the connection hole of the boom. In this way, the tensile strength tests of the entire boom and the connection hole position are completed simultaneously, and the test is comprehensive, thereby improving the test effect.

[0017] 2. Under the action of the positioning rod, before the boom is clamped each time, the positioning rod can position the boom so that the connection hole of the boom corresponds to the conical rod, which can prevent a large deviation between the position of the conical rod and the connection hole of the boom from affecting the subsequent insertion, thereby ensuring that the conical rod can be accurately inserted into the connection hole of the boom subsequently.

[0018] 3. Under the action of the positioning plate, when the boom moves backward on the electric guide roller each time, the positioning plate can center the boom, which can prevent the position of the boom from deviating and affecting the insertion of the conical rod, thereby ensuring the accuracy of the movement position of the boom. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structure diagram of the clamping plate and the electric lead screw of the present invention.

[0021] Figure 3 This is a three-dimensional structural schematic diagram of the driving component and the n-shaped seat of the present invention.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the screw rod and the double-shaft motor of the present invention.

[0023] Figure 5 This is a three-dimensional structural schematic diagram of the conical rod and the connecting plate of the present invention.

[0024] Figure 6 This is a three-dimensional structural schematic diagram of the lifting component of the present invention.

[0025] Figure 7 This is a three-dimensional structural schematic diagram of the lifting frame and the cylinder II of the present invention.

[0026] Figure 8 This is a three-dimensional structural schematic diagram of the positioning component of the present invention.

[0027] Figure 9 This is a three-dimensional structural schematic diagram of the spur gear and the rack of the present invention.

[0028] Figure 10 This is a three-dimensional structural schematic diagram of the positioning rod after swinging of the present invention.

[0029] Figure 11 This is a three-dimensional structural schematic diagram of the deviation correction component of the present invention.

[0030] Figure 12 This is a three-dimensional structural schematic diagram of the protective shell of the present invention.

[0031] Figure 13 This is a three-dimensional structural schematic diagram of the rubber sleeve of the present invention.

[0032] Among them, the above-mentioned drawings include the following reference numerals: 1. Base, 2. Support plate, 3. Electric guiding roller, 31. Human-computer interaction display screen, 4. Sliding seat, 5. Clamping plate, 6. Electric screw rod, 7. Electric push rod, 8. Cylinder I, 81. U-shaped plate, 82. N-shaped seat, 83. Connecting spring, 9. Movable seat, 93. Fixed plate, 94. Conical rod, 95. Connecting plate, 96. Screw rod, 97. Double-shaft motor, 10. Support frame, 101. Lifting frame, 102. Driving roller, 103. Servo motor, 104. Cylinder II, 11. Rotating shaft, 111. Positioning rod, 112. Spur gear, 113. Rack, 12. Movable plate, 121. Positioning plate, 122. Reciprocating screw rod, 13. Protective shell, 14. Rubber sleeve. Detailed implementation manners

[0033] It should be noted first that in the embodiments described differently, the same components are provided with the same reference numerals or the same component names. Among them, the disclosure contained throughout the specification can be meaningfully applied to the same components with the same reference numerals or the same component names. The positional descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated drawings and are meaningfully applied to the new positions when the positions change.

[0034] Embodiment: A tensile strength testing device for an excavator boom. Please refer to Figures 1-10 As shown, it includes a base 1 and support plates 2 symmetrically and fixedly connected to the front and rear sides of the base 1 on the left and right. Electric guiding rollers 3 are evenly spaced and installed between the support plates 2 on the left and right. When the electric guiding rollers 3 rotate forward, the electric guiding rollers 3 can drive the boom to move backward. A human-machine interaction display screen 31 is installed on the base 1, and the human-machine interaction display screen 31 is used to display test data and adjust test parameters. Sliding seats 4 are horizontally slidably connected to both the left and right sides of the base 1. Two clamping plates 5 are slidably connected to both the left and right sliding seats 4. Electric screw rods 6 are vertically installed on the upper parts of the left and right sliding seats 4. The threads on the upper and lower sides of the electric screw rods 6 are opposite. The electric screw rods 6 are threadedly connected to the upper and lower clamping plates 5. Electric push rods 7 are fixedly connected to both the lower left and right sides of the base 1. The telescopic rod ends of the electric push rods 7 on the left and right sides are respectively fixedly connected to the lower parts of the left and right sliding seats 4. It also includes a driving component, a movable seat 9, a fixing plate 93, a tapered rod 94, a connecting plate 95, a screw rod 96, a double-shaft motor 97, a lifting component, and a positioning component. The lifting component is installed on the base 1. When the lifting component operates, the lifting component can drive the boom to move downward. The number of the movable seats 9 is two. Fixing plates 93 are symmetrically and fixedly connected to the upper and lower sides of the mutually approaching sides of the left and right movable seats 9. Tapered rods 94 are vertically slidably connected to the positions of the upper and lower fixing plates 93 away from the movable seats 9. Connecting plates 95 are fixedly connected to the mutually away ends of the upper and lower tapered rods 94. Double-shaft motors 97 are installed on the inner sides of the left and right movable seats 9. Screw rods 96 are fixedly connected to the end parts of the output shafts on the upper and lower sides of the double-shaft motors 97. The threads on the upper and lower sides of the screw rods 96 are opposite. The upper and lower screw rods 96 are respectively threadedly connected to the upper and lower connecting plates 95. The driving component is installed on the base 1, and the driving component is used to drive the movable seat 9 to move, so that the tapered rod 94 moves to correspond to the connecting hole of the boom. Then, start the double-shaft motor 97 to drive the screw rod 96 to rotate. The screw rod 96 drives the tapered rod 94 to move and insert into the connecting hole of the boom through the connecting plate 95. Start the driving component again to make the fixing plate 93 drive the left and right tapered rods 94 to pull the boom, so as to test the tensile strength of the connecting hole of the boom by the tapered rod 94. The positioning component is installed on the base 1. When the positioning component operates, the positioning component can position the boom.

[0035] Please refer to Figure 3As shown, the driving assembly includes a cylinder I 8, a U-shaped plate 81, an N-shaped seat 82, and a connecting spring 83. The inner side of the base 1 is symmetrically and slidably connected with the U-shaped plate 81 on the left and right. The tops of the U-shaped plates 81 on the left and right sides are fixedly connected with the N-shaped seats 82. The N-shaped seats 82 are slidably connected with the base 1. The N-shaped seats 82 on the left and right sides are respectively slidably connected with the movable seats 9 on the left and right sides. Connecting springs 83 are connected between the front inner sides of the N-shaped seats 82 on the left and right sides and the front sides of the movable seats 9 on the left and right sides. The lower part of the base 1 is symmetrically and fixedly connected with the cylinders I 8 on the left and right sides. The telescopic rod ends of the cylinders I 8 on the left and right sides are respectively fixedly connected with the inner sides of the N-shaped seats 82 on the left and right sides.

[0036] Please refer to Figure 6 and Figure 7 As shown, the lifting assembly includes a support frame 10, a lifting frame 101, a driving roller 102, a servo motor 103, and a cylinder II 104. The middle of the top of the base 1 is fixedly connected with the support frame 10. The support frame 10 is located between the electric guide rollers 3 on the front and rear sides. A lifting frame 101 is vertically slidably connected between the inner side of the support frame 10 and the base 1. Five driving rollers 102 are rotatably connected to the top of the lifting frame 101 at equal intervals. The adjacent driving rollers 102 are driven by a synchronous belt assembly. A servo motor 103 is installed on the right front side of the outer bottom of the lifting frame 101. The servo motor 103 is driven by a synchronous belt assembly with the right part of the frontmost driving roller 102. The cylinder II 104 is embedded and fixedly connected to the middle of the top of the base 1. The telescopic rod end of the cylinder II 104 is fixedly connected with the outer bottom of the lifting frame 101.

[0037] Please refer to Figures 8-10 As shown, the positioning assembly includes a rotating shaft 11, a positioning rod 111, and a rotating assembly. The left and right sides of the top of the base 1 are both horizontally rotatably connected with the rotating shaft 11. The end parts of the rotating shafts 11 on the left and right sides away from each other are fixedly sleeved with the positioning rods 111. The positioning rods 111 are located on the left and right sides of the support frame 10. When the positioning rod 111 swings upward and contacts the bucket rod, the positioning rod 111 can position the bucket rod. A rotating assembly is arranged between the lifting frame 101 and the rotating shaft 11. When the rotating assembly operates, the rotating assembly can drive the rotating shaft 11 to rotate; the rotating assembly includes a spur gear 112 and a rack 113. The end parts of the rotating shafts 11 on the left and right sides close to each other are fixedly sleeved with the spur gears 112. The left and right sides of the outer bottom of the lifting frame 101 are both fixedly connected with the racks 113. The racks 113 on the left and right sides are respectively meshed with the spur gears 112 on the left and right sides. When the rack 113 moves, the rack 113 can drive the spur gear 112 to rotate.

[0038] First, start the forward rotation of the front and rear electric guide rollers 3. Then, move the dipper stick to the front electric guide roller 3. The forward rotation of the front electric guide roller 3 drives the dipper stick to move backward. The backward movement of the dipper stick contacts the drive roller 102. Start the servo motor 103. The servo motor 103 drives the forwardmost drive roller 102 to rotate forward through the synchronous belt assembly. The forwardmost drive roller 102 drives the remaining drive rollers 102 to rotate forward through the synchronous belt assembly. The forward rotation of the drive roller 102 drives the dipper stick to move backward. When the dipper stick moves backward to the test position, the dipper stick disengages from the front electric guide roller 3. Turn off the servo motor 103. Start the cylinder II 104. The shortening of the telescopic rod of the cylinder II 104 drives the lifting frame 101 to move downward. The lifting frame 101 drives the drive roller 102 to move downward. The drive roller 102 drives the dipper stick to move downward to contact the top of the support frame 10. At the same time, the lifting frame 101 drives the rack 113 to move downward to engage with the spur gear 112. The rack 113 drives the spur gear 112 to rotate in reverse. The spur gear 112 drives the rotating shaft 11 to rotate in reverse. The reverse rotation of the rotating shaft 11 drives the positioning rod 111 to swing upward by ninety degrees. The positioning rod 111 swings ninety degrees to contact the dipper stick. The positioning rod 111 positions the dipper stick, making the connection hole of the dipper stick correspond to the tapered rod 94, which can prevent a large deviation in the position between the tapered rod 94 and the connection hole of the dipper stick from affecting subsequent insertion. Turn off the cylinder II 104. The support frame 10 supports and places the dipper stick, and the dipper stick is located between the upper and lower clamping plates 5. Then, start the cylinder I 8. The shortening of the telescopic rod of the cylinder I 8 drives the left and right U-shaped plates 81 to move toward each other. The U-shaped plates 81 drive the left and right N-shaped seats 82 to move toward each other. The N-shaped seats 82 drive the left and right movable seats 9 to move toward each other. The movable seat 9 drives the left and right connecting plates 95 to move toward each other through the screw rod 96. The connecting plates 95 drive the left and right tapered rods 94 to move toward each other. When the tapered rod 94 moves to correspond to the connection hole of the dipper stick, turn off the cylinder I 8. Start the double-shaft motor 97 to drive the screw rod 96 to rotate forward. The screw rod 96 drives the upper and lower connecting plates 95 to move toward each other. The connecting plates 95 drive the upper and lower tapered rods 94 to move toward each other. The upper and lower tapered rods 94 are inserted into the connection hole of the dipper stick. Due to the action of the connecting spring 83 and the conical surface of the tapered rod 94, the tapered rod 94 can be accurately inserted into the connection hole of the dipper stick. Turn off the double-shaft motor 97, and the tapered rod 94 stops moving. Then, start the electric lead screw 6 to rotate forward to drive the upper and lower clamping plates 5 to move toward each other. The upper and lower clamping plates 5 contact the dipper stick, and the upper and lower clamping plates 5 clamp and fix the dipper stick. Then, start the electric push rod 7. The elongation of the telescopic rod of the electric push rod 7 drives the left and right sliding seats 4 to move away from each other. The sliding seats 4 drive the left and right clamping plates 5 to move away from each other through the electric lead screw 6. The left and right clamping plates 5 pull the dipper stick to complete the test of the overall tensile strength of the dipper stick. At the same time, start the cylinder I 8. The elongation of the telescopic rod of the cylinder I 8 drives the U-shaped plate 81 to move,This causes the conical rods 94 on the left and right sides to move away from each other, and the conical rods 94 on the left and right sides pull on the connecting holes of the dipper arm, completing the test of the tensile strength of the connecting holes of the dipper arm. In this way, the tensile strength test of the entire dipper arm and the position of the connecting hole is completed simultaneously, and the test is comprehensive, thus improving the test effect. The human-machine interaction display screen 31 then displays the data of the tensile strength test of the entire dipper arm and the connecting hole. The operator can understand whether the tensile strength of the entire dipper arm and the connecting hole is qualified through the test data. When the tensile strength test of the entire dipper arm and the connecting hole is completed, the cylinder I 8 and the electric push rod 7 are turned off, and the clamping plate 5 and the conical rod 94 stop moving. The electric lead screw 6 is started to reverse, driving the clamping plates 5 on the upper and lower sides to move away from each other and reset. The dipper arm is released. At the same time, the double-shaft motor 97 is started to reverse, driving the screw rod 96 to reverse, so that the connecting plate 95 drives the conical rods 94 on the upper and lower sides to move away from each other and reset. The conical rod 94 is disengaged from the connecting hole of the dipper arm. Then the cylinder I 8 is started to drive the U-shaped plate 81 to reset, so that the conical rods 94 on the left and right sides are reset in the direction away from each other. And the electric push rod 7 is started to drive the sliding seat 4 to move and reset, so that the clamping plates 5 on the left and right sides are reset in the direction away from each other. Then the cylinder II 104 is started to drive the driving roller 102 to move upward and reset through the lifting frame 101. The reset of the driving roller 102 drives the dipper arm to move upward and reset. The dipper arm is disengaged from the support frame 10. The reset of the lifting frame 101 drives the rack 113 to move upward and reset. The rack 113 drives the spur gear 112 to rotate forward. The spur gear 112 drives the positioning rod 111 to swing downward and reset through the rotating shaft 11. The servo motor 103 is continued to be started to drive the driving roller 102 to rotate forward, so that the tested dipper arm moves backward to the rear electric guide roller 3. The forward rotation of the rear electric guide roller 3 drives the tested dipper arm to move backward for subsequent processing. And the front electric guide roller 3 continues to drive the untested dipper arm to move backward to the test area. When all the dipper arms are tested, the electric guide roller 3 and the servo motor 103 are turned off.

[0039] Please refer to Figure 11 As shown, the tensile strength test device for the dipper arm of an excavator further includes a deviation rectifying component installed between the front support plate 2 and the front electric guide roller 3. The deviation rectifying component includes a movable plate 12, a positioning plate 121 and a reciprocating lead screw 122. Movable plates 12 are horizontally slidably connected to the mutually remote sides of the left and right front support plates 2. Positioning plates 121 are fixedly connected to the left and right movable plates 12. The front side of the positioning plate 121 is an inclined surface. When the positioning plate 121 moves, the positioning plate 121 can center and position the dipper arm. Reciprocating lead screws 122 are fixedly connected to both ends of the left and right frontmost electric guide rollers 3. The left and right reciprocating lead screws 122 are respectively threadedly connected to the front sides of the left and right movable plates 12. When the reciprocating lead screw 122 rotates, the reciprocating lead screw 122 can drive the movable plate 12 to move left and right.

[0040] When the front electric guide roller 3 rotates forward, the front electric guide roller 3 drives the reciprocating screw 122 to rotate forward, and the reciprocating screw 122 drives the left and right movable plates 12 to move toward each other and reset, and the movable plates 12 drive the left and right positioning plates 121 to move toward each other. When the positioning plates 121 move to the maximum stroke, the reciprocating screw 122 continues to rotate forward to drive the left and right positioning plates 121 to move away from each other and reset. This process is repeated, so that the positioning plates 121 can continuously move back and forth, and then when the boom moves onto the front electric guide roller 3, the left and right positioning plates 121 move toward each other and contact the boom, and the left and right positioning plates 121 correct the deviation and position the boom so that the boom is in a centered position. Then the boom continues to move backward to the drive roller 102 for subsequent tensile strength testing. When all the arms are tested, the electric guide roller 3 is turned off, the front electric guide roller 3 stops driving the reciprocating screw 122 to rotate forward, the reciprocating screw 122 stops driving the movable plate 12 to move, and the movable plate 12 stops driving the positioning plate 121 to move. In this way, the position deviation of the arm can be prevented from affecting the insertion of the tapered rod 94, thereby ensuring the accuracy of the arm movement position.

[0041] See also Figure 12 As shown, the excavator boom tensile strength testing equipment also includes a protective shell 13. The top of the base 1 is fixedly connected with the protective shell 13. The protective shell 13 is located directly above the driving roller 102. The protective shell 13 can block the debris ejected during the test.

[0042] See also Figure 13 As shown, the excavator boom tensile strength testing equipment also includes a rubber sleeve 14. The rubber sleeves 14 are fixedly sleeved on the left and right positioning rods 111. The rubber sleeves 14 can protect the boom.

[0043] When the arm is tested for tensile strength and fails to meet the requirements, the arm will break, and debris will be ejected during the breaking process. The protective shell 13 will block the ejected debris and foreign debris. In this way, the ejected debris can be prevented from causing harm to the surrounding personnel, thereby ensuring the safety of the surrounding personnel.

[0044] When the positioning rod 111 swings upward, the positioning rod 111 drives the rubber sleeve 14 to swing upward, and the rubber sleeve 14 swings upward to contact the boom, and the positioning rod 111 pushes the boom to position through the rubber sleeve 14, and the rubber sleeve 14 protects the boom. In this way, the positioning rod 111 can be prevented from causing wear to the boom, thereby ensuring the integrity of the boom.

[0045] Finally, it is necessary to state that the above content is only used to help understand the technical solution of the present invention and should not be construed as a limitation on the protection scope of the present invention; any non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention fall within the scope of protection required by the present invention.

Claims

1. An excavator boom tensile strength testing device, comprising a base (1) and support plates (2) symmetrically fixed to two side surfaces of the base (1), electric guide rollers (3) are evenly spaced between the support plates (2) on the same side for driving the boom to move, a human-machine interactive display screen (31) is installed on the base (1), a sliding seat (4) is slidably connected to the left and right sides of the base (1), a clamping plate (5) is slidably connected to the sliding seat (4), an electric screw (6) threadedly connected to the clamping plate (5) is installed on the sliding seat (4), the threads of the electric screw (6) on the upper and lower sides are opposite, an electric push rod (7) is fixedly connected to the left and right sides of the base (1), and the telescopic rod end of the electric push rod (7) is fixedly connected to the sliding seat (4), wherein the electric push rod (7) is fixedly connected to the sliding seat (4), wherein the electric push rod (7) is fixedly connected to the sliding seat (4), wherein the electric push rod (7) is fixedly connected to the sliding seat (4), wherein the electric push rod (7) is fixedly connected to the sliding seat (4), wherein the electric push rod (6 ... The utility model also comprises a driving assembly, a movable seat (9), a fixing plate (93), a tapered rod (94), a connecting plate (95), a screw (96), a double-axis motor (97), a lifting assembly and a positioning assembly. The lifting assembly is mounted on the base (1) and is used to drive the dipper arm to move downward. The movable seat (9) is provided with two movable seats. The fixing plate (93) is symmetrically fixed to the movable seat (9). The tapered rod (94) is vertically slidably connected to the fixing plate (93). The end of the tapered rod (94) is fixedly connected to the connecting plate (95). The double-axis motor (97) is mounted on the movable seat (9). The end of the output shaft of the double-axis motor (97) is fixedly connected to the screw (96). The screws (96) on the upper and lower sides are threaded. On the contrary, the screw rod (96) is threadedly connected to the connecting plate (95), and the driving assembly is mounted on the base (1). The driving assembly is used to drive the movable seat (9) to move so that the conical rod (94) moves to correspond to the connecting hole of the boom. Then, the double-axis motor (97) is started to drive the screw rod (96) to rotate. The screw rod (96) drives the conical rod (94) to move and insert into the connecting hole of the boom through the connecting plate (95). The driving assembly is started again so that the fixed plate (93) drives the conical rods (94) on the left and right sides to pull the boom, so that the tensile strength of the conical rod (94) on the connecting hole of the boom is tested. The positioning assembly is mounted on the base (1) and is used to position the boom. The driving assembly comprises a U-shaped plate (81) symmetrically slidably connected to the inner side of the base (1); an N-shaped seat (82) slidably connected to the base (1) is fixedly connected to the U-shaped plate (81); the N-shaped seat (82) is slidably connected to the movable seat (9); a connecting spring (83) is connected between the N-shaped seat (82) and the movable seat (9); a cylinder I (8) is symmetrically fixedly connected to the base (1); and an end of a telescopic rod of the cylinder I (8) is fixedly connected to the N-shaped seat (82); The lifting assembly comprises a support frame (10) fixedly connected to the top of a base (1), the support frame (10) being located between electric guide rollers (3) on both sides, a lifting frame (101) being slidably connected between the inner side of the support frame (10) and the base (1), driving rollers (102) being rotatably connected to the lifting frame (101) at even intervals, adjacent driving rollers (102) being driven by a synchronous belt assembly, a servo motor (103) being installed on the lifting frame (101), the servo motor (103) and one of the driving rollers (102) being driven by a synchronous belt assembly, a cylinder II (104) being embedded and fixedly connected to the base (1), and an end of a telescopic rod of the cylinder II (104) being fixedly connected to the lifting frame (101); The positioning assembly comprises a rotating shaft (11) rotatably connected to the left and right sides of the top of the base (1); the ends of the rotating shaft (11) are fixedly sleeved with positioning rods (111); the positioning rods (111) are located on both sides of the support frame (10) to position the boom; and a rotating assembly is provided between the lifting frame (101) and the rotating shaft (11) to drive the rotating shaft (11) to rotate.

2. The excavator arm tensile strength testing device according to claim 1, characterized in that: The rotating assembly includes a spur gear (112) fixedly mounted on the end of the rotating shaft (11), and racks (113) meshing with the spur gear (112) are fixedly connected to the left and right sides of the outer side surface of the lifting frame (101) to drive the spur gear (112) to rotate.

3. The excavator bucket arm tensile strength testing device according to claim 2, characterized in that: The excavator boom tensile strength testing device also includes a deviation correction component, which includes a movable plate (12) slidably connected to the left and right support plates (2) at the front, a positioning plate (121) fixedly connected to the movable plate (12), the front side of the positioning plate (121) is an inclined surface to center the boom, and a reciprocating screw (122) is fixedly connected to the end of the frontmost electric guide roller (3), and the reciprocating screw (122) is threadedly connected to the movable plate (12) to drive the movable plate (12) to move back and forth.

4. The excavator bucket arm tensile strength testing device according to claim 3, characterized in that: The excavator boom tensile strength testing device also includes a protective shell (13) fixedly connected to the top of the base (1), and the protective shell (13) is located directly above the driving roller (102) to block debris ejected during the test.

5. The excavator bucket arm tensile strength testing device according to claim 4, characterized in that: The excavator boom tensile strength testing device also includes a rubber sleeve (14) fixedly sleeved on the positioning rod (111) to protect the boom.

Images