Hydraulic stretcher tool for fastening bolts

Abstract

The invention discloses a hydraulic stretcher tool for bolt fastening, and belongs to the technical field of hydraulic stretcher tools, the hydraulic stretcher tool comprises a liftable movable base, a lifting frame, a driving part and a stretcher fixing frame, the lifting frame is mounted on the liftable movable base, the driving part capable of moving up and down is mounted on the lifting frame, and a stretcher body is fixedly mounted in the stretcher fixing frame; overturning pieces are installed in the driving pieces and fixedly connected with the two ends of the stretcher fixing frame, and the stretcher fixing frame can do up-down overturning motion through the overturning pieces to drive the stretcher body installed in the stretcher fixing frame to overturn to change the orientation. According to the technical scheme, the orientation of the tensioner body in transmission connection with the overturning piece can be changed by rotating the overturning piece, so that the tensioner body can meet the stretching and pre-tightening requirements of bolts in two directions at the same time through orientation switching, after overturning is completed, the locking plate slides to the base, the clamping shaft on the locking plate is inserted into the clamping hole, and then the locking effect can be achieved; and the tensioner body is prevented from automatically rotating in the using process.

Description

Technical Field

[0001] This invention relates to the field of hydraulic tensioner tooling technology, specifically a hydraulic tensioner tooling for bolt fastening. Background Technology

[0002] Hydraulic bolt tensioner fixtures offer a highly efficient solution for bolt pre-tightening and loosening, integrating a hydraulic bolt tensioner, power source (manual or electric pump), ultra-high pressure hose, and auxiliary fixtures (support bridge, tensioning head). It tensions bolts using pure tensile force, avoiding the uneven pre-tightening force problem of traditional torque methods. In its core components, the tensioner generates tension, the power source provides pressure, the hose transmits pressure, and the auxiliary fixture ensures proper alignment during installation. During use, after quickly connecting the equipment, a no-load test is performed, then the fixture is fitted onto the bolt, and the pump applies pressure to complete the tensioning. This fixture is widely used in wind power, hydropower, and chemical industries, and is especially suitable for high-strength bolts. It features uniform pre-tightening force, high efficiency, and safe operation, significantly improving the reliability of equipment connections.

[0003] Utility model CN222556494U discloses an auxiliary installation fixture for a bolt tensioner, including a lifting module and a top module and a bottom support module arranged sequentially. It adopts a detachable modular design, allowing the lifting module, top module, and bottom support module to be disassembled and transported individually. Its small size and high portability greatly reduce the difficulty of transporting the fixture into the internal platform of a cylindrical body, and the assembly process is simple. The overall size of this utility model allows for smooth movement within the internal platform of a cylindrical body, making it suitable for confined spaces and complex terrain within a cylindrical body. It has a high throughput and is highly convenient to operate, allowing one person to perform the transport, locking, and lifting functions. The internal spatial structure provides construction personnel with a large-angle capability for using a ratchet wrench, overcoming the problem of inconvenient use and transport of bolt tensioners under space constraints.

[0004] While the aforementioned device offers high portability and can move the hydraulic tensioner for easy transport, its structure essentially consists of the hydraulic tensioner body and a mobile carrier. Since the hydraulic tensioner's orientation is fixed, it can only pre-tighten bolts installed in a single direction. When the application scenario involves both upward and downward bolts (i.e., some bolts are installed at the top and some at the bottom of the space), the device cannot simultaneously meet the pre-tightening requirements of bolts in both directions. Therefore, to address this issue, a hydraulic tensioner fixture for bolt fastening is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a hydraulic tensioner fixture for bolt fastening. The hydraulic tensioner fixture is provided with a flipping component, which can change the orientation of the tensioner body connected to it by flipping, so that it can simultaneously meet the tensioning and pre-tightening requirements of bolts in two directions by switching the orientation. At the same time, the lifting frame and the driving component can adjust the height of the tensioner body, so that the height can be adjusted after flipping, avoiding the tensioner body from being unable to be used normally due to height difference caused by flipping. In addition, since the working height of the liftable movable base and the lifting frame can be adjusted, it can also meet the tensioning requirements of bolts of different heights, further broadening its application range and solving the technical problem of the hydraulic tensioner in the comparative technology having a fixed orientation and being unable to simultaneously meet the tensioning and pre-tightening requirements of bolts in two directions.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is: A hydraulic tensioner fixture for bolt fastening includes a liftable movable base, a lifting frame mounted on the liftable movable base and equipped with a drive component that can move up and down, and a tensioner fixing frame with a tensioner body fixedly installed inside. The drive component has a flipping component installed in it, which is fixedly connected to both ends of the tensioner fixing frame. The tensioner fixing frame can rotate up and down through the flipping component, causing the tensioner body installed inside to rotate and change its orientation.

[0007] In one possible implementation, the flipping element includes a base in which a rotatably connected rotating shaft is mounted, and a connecting fork is fixedly connected to the front end of the rotating shaft for fixed connection with the tensioner fixing frame.

[0008] In one possible implementation, the rear end of the rotating shaft is machined into a hexagonal shaft, on which a locking plate is slidably sleeved. A retaining shaft is fixedly installed on the end face of the locking plate near the base, and a retaining hole corresponding to the retaining shaft is opened on the base.

[0009] In one possible implementation, the end of the hexagonal shaft is connected to an anti-detachment end piece. In addition, a magnet is provided at the bottom of the card hole to attract and fix the card shaft inserted into the card hole.

[0010] In one possible implementation, the lifting frame includes two symmetrically arranged guide rods with a triangular connecting plate fixedly connected to their top ends, and guide cylinders are fixedly installed on both sides of the base, which are slidably sleeved on the guide rods.

[0011] In one possible implementation, the lifting frame further includes a mounting base on which an adjusting screw is rotatably connected. The top end of the adjusting screw is rotatably connected to a triangular connecting plate, and the bottom end of the adjusting screw is connected to a handwheel. The driving component includes a C-shaped frame on which a threaded cylinder is fixedly mounted. The threaded cylinder is sleeved on the adjusting screw and threadedly connected to it.

[0012] In one possible implementation, the liftable movable base includes a seat plate with a handle installed thereon. Sliding support rods are installed at the four corners of the seat plate, and wheel frames are fixedly connected to the bottom ends of the support rods. Swinging rollers are installed on the wheel frames. A set of locking wheel groups is threaded onto the support rods. Each set of locking wheel groups includes two locking wheels, which are respectively arranged on the upper and lower sides of the seat plate.

[0013] In one possible implementation, the tensioner body includes a hydraulic tensioning seat with a tensioning platform and a bearing at each end. During operation, the tensioning platform is threadedly connected to the bolt, and the bearing is in contact with the bolt mounting plane.

[0014] In one possible implementation, the tensioner fixing frame includes a C-shaped frame with slots and mating grooves, and the hydraulic tension seat has several locking blocks corresponding to the slots fixedly disposed on its side.

[0015] In one possible implementation, the liftable movable base has a mating hole with a diameter larger than the maximum outer diameter of the support platform.

[0016] In summary, the present invention has the following beneficial technical effects: The hydraulic tensioner fixture is equipped with a flipping component, which includes a base and a rotating shaft that is rotatably connected therein. A connecting fork is fixedly connected to the front end of the rotating shaft, which is used to fix it to the tensioner fixing frame. The orientation of the tensioner body connected to it can be changed by rotating the rotating shaft, so that it can simultaneously meet the tensioning and pre-tightening requirements of bolts in two directions by switching the orientation. After the flipping is completed, the locking plate is slid towards the base, so that the locking pin on it can be inserted into the locking hole to play a locking role and prevent the tensioner body from rotating on its own during use. In addition, the lifting frame and the drive unit can adjust the height of the tensioner body, allowing it to be adjusted after flipping, thus avoiding the tensioner body from being unable to function properly due to height differences caused by flipping. Furthermore, since both the liftable base and the lifting frame can adjust the working height of the liftable base, it can also meet the tensioning needs of bolts of different heights, further expanding its application range. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a partial structural configuration of the present invention; Figure 3This is a schematic diagram of the flipping structure of the present invention; Figure 4 This is a schematic diagram of the lifting frame structure of the present invention; Figure 5 This is a schematic diagram of the height-adjustable movable base structure of the present invention; Figure 6 This is a schematic diagram of the flipping state operation of the present invention.

[0018] In the diagram: 1. Liftable movable base; 11. Seat plate; 111. Mating hole; 12. Support rod; 13. Wheel frame; 14. Roller; 15. Locking wheel assembly; 2. Lifting frame; 21. Guide rod; 22. Triangular connecting plate; 23. Mounting seat; 24. Adjusting screw; 25. Handwheel; 3. Drive component; 31. C-shaped frame; 32. Threaded cylinder; 4. Flipping component; 41. Base; 411. Locking hole; 42. Rotating shaft; 43. Connecting fork; 44. Locking plate; 45. Guide cylinder; 5. Tensioner fixing frame; 51. C-shaped frame; 52. Locking groove; 53. Mating groove; 6. Tensioner body; 61. Hydraulic tensioning seat; 62. Tensioning table; 63. Support platform; 64. Locking block. Detailed Implementation

[0019] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows: like Figure 1 , Figure 6 As shown in the figure, this embodiment provides a hydraulic tensioner fixture for bolt fastening, including a liftable movable base 1, a lifting frame 2, which is mounted on the liftable movable base 1 and has a vertically movable drive component 3 installed on it, and a tensioner fixing frame 5, in which a tensioner body 6 is fixedly installed. The drive component 3 has a flipping component 4 installed in it, which is fixedly connected to both ends of the tensioner fixing frame 5. The tensioner fixing frame 5 can rotate vertically through the flipping component 4, causing the tensioner body 6 installed inside to rotate and change its orientation. This allows it to simultaneously meet the tensioning and pre-tightening requirements of bolts in two directions by changing the orientation. At the same time, the lifting frame 2 and the drive component 3 can adjust the height of the tensioner body 6, so that it can adjust its height after rotation, avoiding the tensioner body 6 from being unable to be used normally due to height difference caused by rotation. In addition, since both the liftable movable base 1 and the lifting frame 2 can adjust the working height of the liftable movable base 1, it can also meet the tensioning requirements of bolts of different heights.

[0020] The flipping component 4 includes a base 41, in which a rotating shaft 42 is rotatably connected. A connecting fork 43 is fixedly connected to the front end of the rotating shaft 42 for fixed connection with the tensioner fixing frame 5. In this structure, because the rotating shaft 42 is rotatable, the orientation of the tensioner body 6 can be switched by rotation. To prevent the tensioner body 6 from rotating on its own during use after flipping, a locking measure is required. Therefore, the rear end of the rotating shaft 42 is machined into a hexagonal shaft, on which a locking plate 44 is slidably fitted. A retaining pin is fixedly installed on the end face of the locking plate 44 near the base 41. A retaining hole 411 corresponding to the retaining pin is opened on the base 41. After flipping, the locking plate 44 is slid towards the base 41, allowing the retaining pin to insert into the retaining hole 411, thus achieving a locking effect. Figure 3 As shown.

[0021] To prevent the locking plate 44 from detaching from the rotating shaft 42 during sliding, and to prevent the locking plate 44 from sliding outwards on its own and thus failing its locking function, an anti-detachment end piece is connected to the end of the hexagonal shaft. In addition, a magnetic piece is provided at the bottom of the locking hole 411 to attract and fix the locking shaft inserted into the locking hole 411. Figure 3 As shown.

[0022] The lifting frame 2 includes two symmetrically arranged guide rods 21, with a triangular connecting plate 22 fixedly connected to their top ends. Guide cylinders 45 are fixedly installed on both sides of the base 41, slidingly sleeved on the guide rods 21. The lifting frame 2 also includes a mounting base 23, on which an adjusting screw 24 is rotatably connected. The top end of the adjusting screw 24 is rotatably connected to the triangular connecting plate 22, and the bottom end of the adjusting screw 24 is connected to a handwheel 25. The driving component 3 includes a C-shaped frame 31, on which a threaded cylinder 32 is fixedly installed. The threaded cylinder 32 is sleeved on the adjusting screw 24 and threadedly connected to it. When the adjusting screw 24 is rotated by the handwheel 25, the threaded cylinder 32 is driven to move up and down, causing the driving component 3 to move up and down as a whole. Ultimately, this drives the tilting component 4 and the tensioner body 6 to move up and down, allowing adjustment of the working height of the tensioner body 6. Figure 4 As shown.

[0023] like Figure 5 As shown, the height-adjustable movable base 1 includes a base plate 11 with a handle installed on it. Sliding support rods 12 are installed at the four corners of the base plate 11, and wheel frames 13 are fixedly connected to the bottom of the support rods 11. Swinging rollers 14 are installed on the wheel frames 13. A set of locking wheel groups 15 is threadedly connected to the support rods 12. Each set of locking wheel groups 15 includes two locking wheels, which are respectively set on the upper and lower sides of the base plate 11. Based on the above structure, the support height of the support rods 12 can be adjusted by adjusting the position of the locking wheel groups 15, thereby adjusting the overall support height of the height-adjustable movable base 1 to change the working height of the tensioner body 6, which has a wider height adjustment range.

[0024] like Figure 2 As shown, the tensioner body 6 includes a hydraulic tensioning seat 61, with a tensioning platform 62 and a support platform 63 at both ends. During operation, the tensioning platform 62 is threadedly connected to the bolt, and the support platform 63 is in contact with the bolt mounting plane. The tensioner fixing frame 5 includes a C-shaped frame 51 with a slot 52 and a mating groove 53. Several locking blocks 64 corresponding to the slot 52 are fixedly installed on the side of the hydraulic tensioning seat 61. Based on the above technical solution, a stable connection between the C-shaped frame 51 and the hydraulic tensioning seat 61 can be achieved through the locking action between the slot 52 and the locking block 64.

[0025] like Figure 1 As shown, the liftable movable base 1 has a mating hole 111 with a diameter larger than the maximum outer diameter of the support 63. This structure can prevent the support 63 from colliding with the liftable movable base 1 when it moves down.

[0026] The principle and process of using this invention: The structure includes a liftable movable base 1, a lifting frame 2, which is mounted on the liftable movable base 1 and has a drive component 3 that can move up and down on it, and a tensioner fixing frame 5, in which a tensioner body 6 is fixedly installed. The drive component 3 has a flipping component 4, which is fixedly connected to both ends of the tensioner fixing frame 5. The tensioner fixing frame 5 can rotate up and down through the flipping component 4, causing the tensioner body 6 installed inside to rotate and change its orientation, so that it can simultaneously meet the tensioning and pre-tightening requirements of bolts in two directions by switching the orientation.

[0027] The above-mentioned flipping operation is specifically manifested as follows: since the rotating shaft 42 has the characteristic of being rotatable, the orientation of the tensioner body 6 can be switched by rotating it; in order to prevent the tensioner body 6 from rotating on its own during use after the flipping is completed, locking measures need to be taken. Therefore, the rear end of the rotating shaft 42 is machined into a hexagonal shaft, and a locking plate 44 is slidably sleeved on it. The locking plate 44 has a locking shaft fixedly installed on the end face near the base 41, and the base 41 has a locking hole 411 corresponding to the locking shaft. After the flipping is completed, the locking plate 44 is slid towards the base 41, so that the locking shaft on it can be inserted into the locking hole 411 to play a locking role.

[0028] Meanwhile, the lifting frame 2 and the drive unit 3 can adjust the height of the tensioner body 6, so that it can be adjusted after flipping, avoiding the tensioner body 6 from being unable to be used normally due to height difference caused by flipping. In addition, since both the liftable movable base 1 and the lifting frame 2 can adjust the working height of the liftable movable base 1, it can also meet the tensioning needs of bolts of different heights.

[0029] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A hydraulic tensioner fixture for bolt tightening, characterized in that, include: Liftable movable base (1); The lifting frame (2) is mounted on the liftable movable base (1) and is equipped with a drive unit (3) that can move up and down. The tensioner fixing frame (5) has the tensioner body (6) fixedly installed inside it. The drive component (3) is equipped with a flipping component (4), which is fixedly connected to both ends of the tensioner fixing frame (5). The tensioner fixing frame (5) can be flipped up and down by the flipping component (4), which drives the tensioner body (6) installed inside to flip and change its orientation.

2. The hydraulic tensioner fixture for bolt fastening according to claim 1, characterized in that: The flipping component (4) includes a base (41) in which a rotating shaft (42) is mounted and the front end of the rotating shaft (42) is fixedly connected to a connecting fork (43) for fixed connection with the tensioner fixing frame (5).

3. The hydraulic tensioner fixture for bolt fastening according to claim 2, characterized in that: The rear end of the rotating shaft (42) is machined into a hexagonal shaft, and a locking plate (44) is slidably sleeved on it. A retaining shaft is fixedly installed on the end face of the locking plate (44) near the base (41), and a retaining hole (411) corresponding to the retaining shaft is opened on the base (41).

4. The hydraulic tensioner fixture for bolt fastening according to claim 3, characterized in that: The end of the hexagonal shaft is connected to an anti-detachment end piece. In addition, a magnet is provided at the bottom of the hole (411) to attract and fix the shaft inserted into the hole (411).

5. The hydraulic tensioner fixture for bolt fastening according to claim 2, characterized in that: The lifting frame (2) includes two symmetrically arranged guide rods (21), with a triangular connecting plate (22) fixedly connected to its top. Guide cylinders (45) are fixedly installed on both sides of the base (41), and are slidably sleeved on the guide rod (21).

6. The hydraulic tensioner fixture for bolt tightening according to claim 4, characterized in that: The lifting frame (2) also includes a mounting base (23), on which an adjusting screw (24) is rotatably connected. The top end of the adjusting screw (24) is rotatably connected to the triangular connecting plate (22), and the bottom end of the adjusting screw (24) is connected to a handwheel (25). The drive component (3) includes a C-shaped frame (31) on which a threaded cylinder (32) is fixedly mounted. The threaded cylinder (32) is sleeved on the adjusting screw (24) and threadedly connected to it.

7. The hydraulic tensioner fixture for bolt fastening according to claim 1, characterized in that: The liftable movable base (1) includes a seat plate (11) with a handle installed on it. Sliding support rods (12) are installed at the four corners of the seat plate (11), and a wheel frame (13) is fixedly connected to its bottom end. Swinging rollers (14) are installed on the wheel frame (13). A set of locking wheel groups (15) is threaded onto the support rod (12). Each set of locking wheel groups (15) includes two locking wheels, which are respectively set on the upper and lower sides of the seat plate (11).

8. The hydraulic tensioner fixture for bolt fastening according to claim 1, characterized in that: The tensioner body (6) includes a hydraulic tension seat (61), with a tensioning platform (62) and a support platform (63) at its two ends respectively. During operation, the tensioning platform (62) is threadedly connected to the bolt, and the support platform (63) is in contact with the bolt mounting plane.

9. The hydraulic tensioner fixture for bolt fastening according to claim 8, characterized in that: The tensioner fixing frame (5) includes a C-shaped frame (51) with a slot (52) and a mating slot (53) on it; The hydraulic tension seat (61) has several locking blocks (64) fixedly installed on its side, which correspond to the locking slot (52).

10. The hydraulic tensioner fixture for bolt fastening according to claim 8, characterized in that: The liftable movable base (1) has a mating hole (111) with a diameter greater than the maximum outer diameter of the support platform (63).

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