Floating screw connection device

Abstract

The present invention provides a floating screwing device, including a floating mechanism and a transmission mechanism and a gripping mechanism provided at its lower end, wherein the upper end of the main shaft is fixedly sleeved to the middle of the flange, the lower end of the main shaft is fixedly sleeved to the upper end of the slide, the lower end of the slide is fixedly connected to the upper end of the first base plate, a plurality of elastic components are circumferentially provided on the first base plate, the periphery of each elastic component is sleeved to the first base plate, the lower end of the elastic component is clamped to the upper end of the second base plate, one end of the transmission mechanism is fixedly sleeved to the two side walls of the second base plate, and the periphery of the gripping mechanism is sleeved to the inside of the transmission mechanism. The floating screwing device described in the present invention can realize all-round floating adjustment when the protective ring is screwed or the coupling is pre-tightened, avoiding screwing failure caused by the inconsistent position of the axis of the protective ring or coupling with the screwed pipe, so that the protective ring is automatically tightened into place and the coupling is automatically pre-tightened into place, solving the problems of low efficiency and unstable quality of manual screwing, reducing labor intensity, and improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of steel pipe processing, and in particular relates to a floating screwing device. Background Art

[0002] In the existing oil pipe processing industry, oil pipes are connected by couplings through the internal and external threads at their ends. To prevent damage to the internal threads during transportation, thread protection rings are typically screwed onto the pipe ends. Existing protection rings are tightened manually, resulting in unstable torque, high labor intensity, and a low degree of automation. Furthermore, existing coupling pre-tightening stations are typically performed manually, with some using simple equipment. While this simple pre-tightening process performs well, the degree of automation is low, resulting in poor results. Summary of the Invention

[0003] In view of this, the present invention aims to provide a floating screwing device to solve the problems of unstable torque, high labor intensity and low degree of automation when manually screwing the protective ring.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] The lifting mechanism is a bottom end of the lifting mechanism, and the lifting mechanism is a bottom end of the lifting mechanism, and the lifting mechanism is a bottom end of the lifting mechanism, and the lifting mechanism is a bottom end of the lifting mechanism.

[0006] Furthermore, the slide seat includes a third base plate, a first cylinder, a first slide rail, a slider and a second slide rail. The lower end of the main shaft is sleeved on the middle of the third base plate. The periphery of the first cylinder is fixedly connected to one side of the third base plate. The movable rod of the first cylinder is fixedly connected to one side of the first base plate. Two first slide rails parallel to each other are set at the lower end of the third base plate. Two second slide rails parallel to each other are set at the upper end of the first base plate. The first slide rail and the second slide rail are arranged parallel to each other. The upper end of each slider is slidably connected to the periphery of the first slide rail, and the lower end of each slider is slidably connected to the periphery of the second slide rail. The third limit assembly includes a second cylinder and a third cylinder symmetrically arranged. The peripheries of the second cylinder and the third cylinder are respectively fixedly connected to the upper end of the first base plate, and the movable rods of the second cylinder and the third cylinder are respectively contacted and connected to both sides of the third base plate.

[0007] Furthermore, the elastic component includes a first support plate, a bolt rod and a spring. A bolt rod is respectively connected to both ends of the first support plate. The lower ends of the bolt rods pass through the first base plate and are fixedly connected to the top of the second base plate. A spring is arranged on the periphery of each bolt rod, and the spring is located between the first support plate and the first base plate.

[0008] Furthermore, the first limiting assembly includes a fourth cylinder, a fifth cylinder, a second support plate and a sixth cylinder. The periphery of the fourth cylinder and the periphery of the fifth cylinder are fixedly connected to the periphery of the transmission mechanism through the second support plate. The movable rods of the fourth cylinder and the fifth cylinder are both contacted and connected to the bottom of the second base plate. The periphery of the sixth cylinder is fixedly connected to the bottom of the second base plate. The movable rod of the sixth cylinder passes through the bottom of the second base plate and is fixedly connected to the upper end of the first base plate.

[0009] Furthermore, the second limiting assembly includes a seventh cylinder and an eighth cylinder, the cross-section of the flange is an L-shaped structure, the periphery of the seventh cylinder and the eighth cylinder are fixedly connected to the upper end of the third base plate, and the movable rod of the seventh cylinder and the movable rod of the eighth cylinder are both in contact with one side of the flange.

[0010] Furthermore, the gripping mechanism includes an opening and closing cylinder, a counterweight, a first pipe sleeve, a second pipe sleeve, a lathe chuck and a claw. One end of the first pipe sleeve is fixedly connected to one side of the transmission mechanism, and the other end of the first pipe sleeve is installed with the opening and closing cylinder. The outer periphery of the first pipe sleeve is sleeved with the counterweight, and the outer periphery of the second pipe sleeve is sleeved to the other side of the transmission mechanism. One end of the second pipe sleeve is located inside the transmission mechanism, and the other end of the second pipe sleeve is fixedly connected to one end of the lathe chuck. A number of claws are provided at the other end of the lathe chuck. The telescopic rod of the opening and closing cylinder passes through the interior of the first pipe sleeve, the interior of the transmission mechanism and the interior of the second pipe sleeve in sequence and is fixedly connected to the interior of the lathe chuck.

[0011] Furthermore, the transmission mechanism includes a motor and a gearbox. The periphery of the gearbox is fixedly connected to the two side walls of the second base plate, the periphery of the motor is fixedly connected to the periphery of the gearbox, and the transmission gear of the motor is meshed with the internal gear of the gearbox, and one end of the second pipe sleeve is meshed with the internal gear of the gearbox.

[0012] Furthermore, the clamping claw includes a clamping finger, a pin rod and a guide block, and a plurality of fixing holes are evenly distributed on the guide block. The outer periphery of the guide block is slidably connected to one end of the lathe chuck, and one end of the clamping finger is fixedly connected to the one fixing hole through the pin rod.

[0013] Compared with the prior art, the floating screwing device of the present invention has the following advantages:

[0014] (1) The floating screwing device described in the present invention can realize all-round floating adjustment when the protective ring is screwed or the coupling is pre-tightened, avoiding screwing failure caused by the inconsistent axial position of the protective ring or coupling and the screwed pipe, so that the protective ring is automatically tightened into place and the coupling is automatically pre-tightened into place, solving the problems of low efficiency and unstable quality of manual screwing, reducing labor intensity and improving production efficiency.

[0015] (2) The floating screwing device described in the present invention can be installed on a robotic arm, automatically grab the protective ring and the coupling, and extend into the pipe under the drive of the robotic arm, so as to screw the protective ring, the coupling and the steel pipe together. This structure can realize elastic floating and locking in all directions, thereby realizing all-round automatic adjustment when the protective ring and the coupling are screwed together, avoiding the screwing skew caused by the non-coaxiality of the protective ring, the coupling and the pipe, so that the protective ring and the coupling can be screwed together automatically, avoiding the torque instability during manual screwing, and improving the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic structural diagram of a floating screw connection device according to an embodiment of the present invention;

[0018] Figure 2 This is a structural diagram of a floating mechanism according to an embodiment of the present invention;

[0019] Figure 3 A side view of the floating mechanism according to an embodiment of the present invention;

[0020] Figure 4 A schematic structural diagram of the assembly of the slide, the first base plate, the first limiting assembly, and the third limiting assembly according to an embodiment of the present invention;

[0021] Figure 5This is a schematic structural diagram of the assembly of the first base plate, the elastic component, the second base plate, and the first limiting component according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of the assembly of the flange and the second limiting component according to an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the structure of the transmission mechanism and the gripping mechanism according to an embodiment of the present invention;

[0024] Figure 8 Schematic diagram of the structure of the clamping claw according to an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1-flange; 2-transmission mechanism; 201-motor; 202-gearbox; 3-grabbing mechanism; 301-opening and closing cylinder; 302-counterweight; 303-first pipe sleeve; 304-second pipe sleeve; 305-lathe chuck; 306-claw; 3061-guide block; 3062-clamping finger; 3063-pin rod; 4-spindle; 5-slide seat; 501-third base plate; 502-first cylinder; 503-first slide rail; 504-slider; 50 5 - Second slide rail; 6 - First base plate; 7 - Elastic assembly; 701 - First support plate; 702 - Bolt rod; 703 - Spring; 8 - Second base plate; 9 - First position-limiting assembly; 901 - Fourth cylinder; 902 - Fifth cylinder; 903 - Second support plate; 904 - Sixth cylinder; 10 - Second position-limiting assembly; 1001 - Seventh cylinder; 1002 - Eighth cylinder; 11 - Third position-limiting assembly; 1101 - Second cylinder; 1102 - Third cylinder; DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as limiting 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 indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] like Figure 1-8As shown, the floating screwing device includes a floating mechanism and a transmission mechanism 2 and a grasping mechanism 3 arranged at its lower end, the floating mechanism includes a flange 1, a main shaft 4, a slide 5, a first base plate 6, an elastic component 7, a second base plate 8, a first limiting component 9, a second limiting component 10 and a third limiting component 11, the upper end of the main shaft 4 is fixedly sleeved to the middle of the flange 1, the lower end of the main shaft 4 is fixedly sleeved to the upper end of the slide 5, and the upper end of the slide 5 is provided with a second limiting component 10, one end of the second limiting component 10 is fixedly connected to the lower end of the flange 1, the lower end of the slide 5 is fixedly connected to the upper end of the first base plate 6, the upper end of the first base plate 6 is installed with a third limiting component 11, the third limiting component 11 is located on the periphery of the slide 5, and a plurality of elastic components 7 are circumferentially arranged on the first base plate 6, and the periphery of each elastic component 7 is sleeved to On the first base plate 6, the lower end of the elastic component 7 is clamped to the upper end of the second base plate 8. The cross-section of the second base plate 8 is a U-shaped structure. One end of the transmission mechanism 2 is fixedly sleeved to the two side walls of the second base plate 8, and the two side walls of the second base plate 8 are respectively provided with a first limit component 9. The outer periphery of the grasping mechanism 3 is sleeved to the inside of the transmission mechanism 2 and can be installed on a robotic arm to automatically grasp the protective ring and the coupling, and extend into the pipe under the drive of the robotic arm, so as to screw the protective ring, the coupling and the steel pipe together. This structure can realize all-directional elastic floating and locking, thereby realizing all-round automatic adjustment of the protective ring and the coupling when screwing, avoiding the screwing skew caused by the different axes of the protective ring, the coupling and the pipe, so that the protective ring and the coupling can be screwed automatically, avoiding unstable torque during manual screwing, and improving the degree of automation.

[0032] The slide 5 includes a third base plate 501, a first cylinder 502, a first slide rail 503, a slider 504 and a second slide rail 505. The lower end of the main shaft 4 is sleeved to the middle of the third base plate 501. The outer periphery of the first cylinder 502 is fixedly connected to one side of the third base plate 501. The movable rod of the first cylinder 502 is fixedly connected to one side of the first base plate 6. The cylinder rod of the first cylinder 502 extends to push the slider 504 and the lower first base plate 6, the second base plate 8, the transmission mechanism 2 and the grasping mechanism 3. Two mutually parallel first slide rails 503 are provided at the lower end of the third base plate 501, and two mutually parallel second slide rails 505 are provided at the upper end of the first base plate 6. The first slide rail 503 and the second slide rail 505 are arranged parallel to each other. The upper end of each slider 504 is slidably connected to the outer periphery of the first slide rail 503, and the lower end of each slider 504 is slidably connected to the outer periphery of the second slide rail 505 The third limiting assembly 11 includes a second cylinder 1101 and a third cylinder 1102 symmetrically arranged with each other. The peripheries of the second cylinder 1101 and the third cylinder 1102 are respectively fixedly connected to the upper end of the first base plate 6, and the movable rods of the second cylinder 1101 and the third cylinder 1102 are respectively in contact with and connected to both sides of the third base plate 501. The second cylinder 1101 and the third cylinder 1102 are fixedly connected to the first base plate 6. When locking is required, the movable rods of the second cylinder 1101 and the third cylinder 1102 are extended, and the rod heads are pressed against one side of the third base plate 501, and locked along the X-axis degree of freedom. When loosening is required, the cylinder rods of the second cylinder 1101 and the third cylinder 1102 are retracted, and the rod heads leave one side of the third base plate 501, and are loosened along the X-axis degree of freedom, so as to ensure that the protective ring and the coupling are accurately positioned and can float freely when screwed.

[0033] The elastic component 7 includes a first support plate 701, a bolt rod 702 and a spring 703. A bolt rod 702 is respectively connected to each end of the first support plate 701. The lower ends of the two bolt rods 702 pass through the first base plate 6 and are fixedly connected to the top of the second base plate 8. A spring 703 is set on the periphery of each bolt rod 702. The spring 703 is located between the first support plate 701 and the first base plate 6. The second base plate 8 and the lower mechanism are lowered along the Z axis by gravity until the elastic force of the spring 703 is balanced. The bolt rod 702 plays a guiding role and is relaxed along the Z axis.

[0034] The first limiting assembly 9 includes a fourth cylinder 901, a fifth cylinder 902, a second support plate 903 and a sixth cylinder 904. The outer periphery of the fourth cylinder 901 and the outer periphery of the fifth cylinder 902 are fixedly connected to the outer periphery of the transmission mechanism 2 through the second support plate 903. The movable rods of the fourth cylinder 901 and the fifth cylinder 902 are both contacted and connected to the bottom of the second base plate 8. The outer periphery of the sixth cylinder 904 is fixedly connected to the bottom of the second base plate 8. The movable rod of the sixth cylinder 904 passes through the bottom of the second base plate 8 and is fixedly connected to the upper end of the first base plate 6. The fourth cylinder 901 and the fifth cylinder 902 are fixedly connected to the second support plate 903, and the second support plate 903 is fixedly connected to the housing of the gear box 202. When locking is required, the cylinder rods of the fourth cylinder 901 and the fifth cylinder 902 are extended, and the rod heads are pressed against the second base plate 8, locking around the X-axis degree of freedom. When loosening is required, the cylinder rods of the fourth cylinder 901 and the fifth cylinder 902 are retracted, and the rod heads leave the second base plate 8, loosening around the X-axis degree of freedom.

[0035] The second limiting assembly 10 includes a seventh cylinder 1001 and an eighth cylinder 1002. The cross-section of the flange 1 is an L-shaped structure. The peripheries of the seventh cylinder 1001 and the eighth cylinder 1002 are fixedly connected to the upper end of the third base plate 501. The movable rod of the seventh cylinder 1001 and the movable rod of the eighth cylinder 1002 are both in contact with one side of the flange 1. The seventh cylinder 1001 and the eighth cylinder 1002 are both fixedly connected to the third base plate 501. When locking is required, the movable rod of the cylinder is extended, and the rod head of the movable rod is pressed against one side of the flange 1 and locked around the Z-axis degree of freedom. When relaxation is required, the cylinder rods of the seventh cylinder 1001 and the eighth cylinder 1002 are retracted, and the rod heads leave one side of the flange 1 and are relaxed around the Z-axis degree of freedom.

[0036] The first cylinder 502, the second cylinder 1101, the third cylinder 1102, the fourth cylinder 901, the fifth cylinder 902, the sixth cylinder 904, the seventh cylinder 1001 and the eighth cylinder 1002 are all ACQ ultra-thin series cylinders, and the first cylinder 502, the second cylinder 1101, the third cylinder 1102, the fourth cylinder 901, the fifth cylinder 902, the sixth cylinder 904, the seventh cylinder 1001 and the eighth cylinder 1002 are each connected to the air pump through a solenoid valve.

[0037] The grabbing mechanism 3 includes an opening and closing cylinder 301, a counterweight 302, a first sleeve 303, a second sleeve 304, a lathe chuck 305 and a claw 306. One end of the first sleeve 303 is fixedly connected to one side of the transmission mechanism 2, and the other end of the first sleeve 303 is installed with the opening and closing cylinder 301. The model of the opening and closing cylinder 301 is RH-100. The outer periphery of the first sleeve 303 is sleeved with the counterweight 302, and the outer periphery of the second sleeve 304 is sleeved to the other side of the transmission mechanism 2. One end of the second sleeve 304 is located inside the transmission mechanism 2, and the other end of the second sleeve 304 is fixedly connected to one end of the lathe chuck 305. The model of the lathe chuck 305 is KD08-3. A plurality of claws 306 are set at the other end of the lathe chuck 305. The telescopic rod of the cylinder 301 passes through the interior of the first sleeve 303, the interior of the transmission mechanism 2 and the interior of the second sleeve 304 in sequence and is fixedly connected to the interior of the lathe chuck 305. The transmission mechanism 2 includes a motor 201 and a gear box 202. The periphery of the gear box 202 is fixedly connected to the two side walls of the second base plate 8. The model of the motor 201 is ECMA-EX1315ES. The periphery of the motor 201 is fixedly connected to the periphery of the gear box 202, and the transmission gear of the motor 201 is engaged with the internal gear of the gear box 202. One end of the second sleeve 304 is engaged with the internal gear of the gear box 202. The motor 201 drives the lathe chuck 305 to rotate through the gear box 202, and the movable rod of the opening and closing cylinder 301 is extended and retracted to realize the opening and closing of the control claw 306.

[0038] The clamping claw 306 includes a clamping finger 3062, a pin rod 3063 and a guide block 3061. Several fixing holes are evenly distributed on the guide block 3061. The outer periphery of the guide block 3061 is slidably connected to one end of the lathe chuck 305. One end of the clamping finger 3062 is fixedly connected to the one fixing hole through the pin rod 3063. Several clamping claws 306 are arranged in a circular array along one end of the lathe chuck 305. The inner diameter of the circular array can be adjusted by adjusting the clamping finger 3062 to be fixed in different fixing holes to meet the production requirements of pipes of different specifications.

[0039] Working principle of floating screw connection device:

[0040] If the axis of the steel pipe is set as the Y axis, the vertical direction is the Z axis, and the horizontal direction perpendicular to the Y axis is the X axis, the main shaft 4 can achieve a floating degree of freedom of rotation around the Z axis, the second sleeve 304 can achieve a floating degree of freedom of rotation around the X axis, the first slide rail 503 and the slider 504 can achieve a floating degree of freedom of linear motion along the Y axis, the second slide rail 505 and the slider 504 can achieve a floating degree of freedom of linear motion along the X axis, the bolt rod 702 can achieve a floating degree of freedom of linear motion along the Z axis, and the spring 703 provides a restoring force for the floating degree of freedom of linear motion along the Z axis. The motor 201 drives the lathe chuck 305 to rotate through the gear box 202, and the movable rod of the opening and closing oil cylinder 301 is extended and retracted to control the opening and closing of the guide block to control the opening and closing of the clamping finger 3062.

[0041] In order to ensure that the protection ring and coupling are accurately grasped and inserted into the position, and can float freely during the screw connection, the rotational and linear movement freedom of the floating screw connection device must have locking and releasing functions. The seventh cylinder 1001 and the eighth cylinder 1002 are both fixedly connected to the third base plate 501. When locking is required, the movable rod of the cylinder is extended, and the rod head of the movable rod is pressed against one side of the flange 1, and locked around the Z-axis freedom. When loosening is required, the cylinder rods of the seventh cylinder 1001 and the eighth cylinder 1002 are retracted, and the rod head leaves one side of the flange 1, and are loosened around the Z-axis freedom. The second cylinder 1101 and the third cylinder 1102 are fixedly connected to the first base plate 6. When locking is required, the movable rods of the second cylinder 1101 and the third cylinder 1102 are extended, and the rod head is pressed against one side of the third base plate 501, and locked along the X-axis freedom. When loosening is required, the cylinder rods of the second cylinder 1101 and the third cylinder 1102 are retracted, and the rod head leaves one side of the third base plate 501, and are loosened along the X-axis freedom. 902 is fixedly connected to the second support plate 903, and the second support plate 903 is fixedly connected to the gear box 202 housing. When locking is required, the cylinder rods of the fourth cylinder 901 and the fifth cylinder 902 are extended, and the rod heads are pressed against the second base plate 8, locking around the X-axis degree of freedom. When loosening is required, the cylinder rods of the fourth cylinder 901 and the fifth cylinder 902 are retracted, and the rod heads leave the second base plate 8, relaxing around the X-axis degree of freedom; the sixth cylinder 904 is fixedly connected to the second base plate 8. When locking is required, the cylinder rod of the sixth cylinder 904 tightens the first base plate 6 and the second base plate 8, locking along the Z-axis degree of freedom. When loosening is required, the cylinder rod of the sixth cylinder 904 is extended, and the second base plate 8 and the lower mechanism are lowered along the Z-axis by gravity until they are balanced with the elastic force of the spring 703. The bolt rod 702 plays a guiding role and relaxes along the Z-axis degree of freedom.

[0042] To ensure that the floating screwing device is in a balanced position by default with respect to the rotational freedom around the X-axis, a counterweight 302 is installed at the rear of the first sleeve 303 of the gripping mechanism 3 to balance the gravity of the lathe chuck 305 .

[0043] In order to ensure that the floating screwing device can provide a constant thrust along the Y axis of the steel pipe, a first cylinder 502 is provided, and the cylinder rod of the first cylinder 502 extends to push the slider 504 and the lower first base plate 6, the second base plate 8, the transmission mechanism 2 and the grasping mechanism 3.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Floating screwing device, characterized by: The invention comprises a floating mechanism and a transmission mechanism (2) and a grasping mechanism (3) arranged at its lower end, wherein the floating mechanism comprises a flange (1), a main shaft (4), a slide (5), a first base plate (6), an elastic component (7), a second base plate (8), a first limiting component (9), a second limiting component (10) and a third limiting component (11), wherein the upper end of the main shaft (4) is fixedly sleeved to the middle of the flange (1), the lower end of the main shaft (4) is fixedly sleeved to the upper end of the slide (5), and the upper end of the slide (5) is provided with a second limiting component (10), one end of the second limiting component (10) is fixedly connected to the lower end of the flange (1), and the lower end of the slide (5) is fixedly connected to the The upper end of the first base plate (6) is provided with a third limiting assembly (11), and the third limiting assembly (11) is located on the periphery of the slide seat (5). The first base plate (6) is provided with a plurality of elastic assemblies (7) in a circumferential direction, and the periphery of each elastic assembly (7) is sleeved on the first base plate (6). The lower end of the elastic assembly (7) is clamped to the upper end of the second base plate (8). The cross section of the second base plate (8) is a U-shaped structure. One end of the transmission mechanism (2) is fixedly sleeved on the two side walls of the second base plate (8), and the two side walls of the second base plate (8) are respectively provided with the first limiting assembly (9). The periphery of the grabbing mechanism (3) is sleeved inside the transmission mechanism (2). The slide seat (5) includes a third base plate (501), a first cylinder (502), a first slide rail (503), a slider (504) and a second slide rail (505). The lower end of the main shaft (4) is sleeved to the middle of the third base plate (501). The periphery of the first cylinder (502) is fixedly connected to one side of the third base plate (501). The movable rod of the first cylinder (502) is fixedly connected to one side of the first base plate (6). Two mutually parallel first slide rails (503) are provided at the lower end of the third base plate (501). Two mutually parallel second slide rails (505) are provided at the upper end of the first base plate (6). The first slide rail (503) is provided at the lower end of the third base plate (501). ) and the second slide rail (505) are arranged perpendicular to each other, the upper end of each slider (504) is slidably connected to the periphery of the first slide rail (503), and the lower end of each slider (504) is slidably connected to the periphery of the second slide rail (505), the third limiting assembly (11) includes a second cylinder (1101) and a third cylinder (1102) that are symmetrically arranged with each other, the peripheries of the second cylinder (1101) and the third cylinder (1102) are respectively fixedly connected to the upper end of the first base plate (6), and the movable rods of the second cylinder (1101) and the third cylinder (1102) are respectively contacted and connected to both sides of the third base plate (501); The elastic component (7) includes a first support plate (701), a bolt rod (702) and a spring (703). The two ends of the first support plate (701) are respectively connected to a bolt rod (702). The lower ends of the bolt rods (702) pass through the first bottom plate (6) and are fixedly connected to the top of the second bottom plate (8). A spring (703) is provided on the periphery of each bolt rod (702). The spring (703) is located between the first support plate (701) and the first bottom plate (6). The first limiting assembly (9) includes a fourth cylinder (901), a fifth cylinder (902), a second support plate (903) and a sixth cylinder (904); the periphery of the fourth cylinder (901) and the periphery of the fifth cylinder (902) are fixedly connected to the periphery of the transmission mechanism (2) through the second support plate (903); the movable rods of the fourth cylinder (901) and the fifth cylinder (902) are both contact-connected to the bottom of the second base plate (8); the periphery of the sixth cylinder (904) is fixedly connected to the bottom of the second base plate (8); and the movable rod of the sixth cylinder (904) passes through the bottom of the second base plate (8) and is fixedly connected to the upper end of the first base plate (6); The second limiting assembly (10) includes a seventh cylinder (1001) and an eighth cylinder (1002), the cross section of the flange (1) is an L-shaped structure, the peripheries of the seventh cylinder (1001) and the eighth cylinder (1002) are fixedly connected to the upper end of the third base plate (501), and the movable rod of the seventh cylinder (1001) and the movable rod of the eighth cylinder (1002) are both in contact with one side of the flange (1).

2. The floating screw connection device according to claim 1, characterized in that: The gripping mechanism (3) comprises an opening and closing oil cylinder (301), a counterweight (302), a first pipe sleeve (303), a second pipe sleeve (304), a lathe chuck (305) and a claw (306). One end of the first pipe sleeve (303) is fixedly connected to one side of the transmission mechanism (2). The other end of the first pipe sleeve (303) is installed with the opening and closing oil cylinder (301). The outer periphery of the first pipe sleeve (303) is sleeved with the counterweight (302). The outer periphery of the second pipe sleeve (304) is sleeved with the transmission mechanism (2). On the other side of the transmission mechanism (2), one end of the second pipe sleeve (304) is located inside the transmission mechanism (2), the other end of the second pipe sleeve (304) is fixedly connected to one end of a lathe chuck (305), and a plurality of claws (306) are provided at the other end of the lathe chuck (305). The telescopic rod of the opening and closing oil cylinder (301) passes through the interior of the first pipe sleeve (303), the interior of the transmission mechanism (2), and the interior of the second pipe sleeve (304) in sequence, and is then fixedly connected to the interior of the lathe chuck (305).

3. The floating screw connection device according to claim 2, characterized in that: The transmission mechanism (2) comprises a motor (201) and a gear box (202). The periphery of the gear box (202) is fixedly connected to the two side walls of the second bottom plate (8). The periphery of the motor (201) is fixedly connected to the periphery of the gear box (202). The transmission gear of the motor (201) is meshed with the internal gear of the gear box (202). One end of the second pipe sleeve (304) is meshed with the internal gear of the gear box (202).

4. The floating screw connection device according to claim 3, characterized in that: The clamping claw (306) includes a clamping finger (3062), a pin rod (3063) and a guide block (3061). A plurality of fixing holes are evenly distributed on the guide block (3061). The outer periphery of the guide block (3061) is slidably connected to one end of the lathe chuck (305). One end of the clamping finger (3062) is fixedly connected to one of the fixing holes through the pin rod (3063).

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