Hydraulic bolt tightening device

Abstract

The utility model belongs to the technical field of hydraulic bolts, and particularly relates to a hydraulic bolt loosening and tightening device which comprises a hydraulic bolt, a shell is arranged on the outer side of the hydraulic bolt, four sets of supporting grooves are formed in the shell, positioning rods are connected into the supporting grooves in a sliding mode, and a first limiting plate is fixedly connected to one side of each positioning rod. Four positioning rods and a first limiting plate are pushed to drive four screwing bases to move in a shell, when the four screwing bases diffuse outwards, reinforcing plates move out of limiting grooves, springs are stretched, the four reinforcing plates and the four screwing bases are matched, the circle dimension of the four screwing bases can be enlarged, and when external force is not applied to the screwing bases, the screwing bases can be fixed through bolts. And under the action of the elasticity of the springs, the two ends of the reinforcing plates are driven to move into the limiting grooves, so that the circle dimensions of the four groups of screwing seats are reduced, the device can meet the use requirements of hydraulic bolts with different sizes, and the application range of the device is expanded.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic bolt technology, specifically a hydraulic bolt tightening and loosening device. Background Technology

[0002] Hydraulic bolts are precision-designed, high-pressure, high-performance hydraulically operated bolt fastening devices. After disassembly, the taper of the tension bolt, the inner conical hole and outer circle of the intermediate conical sleeve, and the bolt holes on the coupling all retain their original surface roughness, so they can be reused. However, adjusting their tightness is currently quite troublesome, thus requiring a hydraulic bolt tightening device.

[0003] A Chinese patent with authorization announcement number CN118407967A discloses a hydraulic bolt tightening device, including a hydraulic nut body and an assembly base. The tightening seat on the surface of the hydraulic nut body is screwed into the surface of the assembly screw head. With the fixing mechanism of the tightening seat and the assembly screw head surface, the hydraulic nut body can be firmly installed on the surface of the assembly base, avoiding the problem of welding the hydraulic nut to the surface of the assembly base in the prior art. This facilitates the subsequent replacement of the hydraulic nut and can also reduce loosening under the high-frequency vibration of external equipment, making the hydraulic nut highly flexible in use and improving its practicality.

[0004] However, the above solution still has some problems. The size of the tightening seat cannot be changed, so it cannot be applied to hydraulic bolts of different sizes, which leads to a narrowing of the application range of the tightening device. Therefore, a hydraulic bolt tightening device is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and address the problems of existing equipment, this utility model proposes a hydraulic bolt tightening and loosening device.

[0006] The technical solution adopted by this utility model to solve its technical problem is a hydraulic bolt tightening and loosening device, including: a hydraulic bolt, an outer shell provided on the outside of the hydraulic bolt, four sets of support grooves provided on the outer shell, a positioning rod slidably connected inside the support groove, a first limiting plate fixedly connected to one side of the positioning rod, threaded holes provided on the first limiting plate and the outer shell, a positioning bolt threadedly connected inside the threaded holes, a tightening seat fixedly connected to the other side of the positioning rod, the tightening seat located inside the outer shell, an internal thread provided on one side of the tightening seat, the internal thread threadedly connected to the hydraulic bolt, a limiting groove provided inside each of the four sets of tightening seats, a connecting rod fixedly connected to the middle of each limiting groove, the positioning rod located inside the support groove, one end of the positioning rod extending into the outer shell and connecting to the tightening seat, the other end extending out of the outer shell and connecting to the first limiting plate, thereby, with the cooperation of the support groove and the first limiting plate, the position of the tightening seat can be fixed by the positioning rod, thus ensuring the stability of the device.

[0007] Preferably, springs are fixedly connected to both sides of the connecting rod, and a second limiting plate is fixedly connected to one end of each of the two sets of springs. The second limiting plate is slidably connected inside the limiting groove. Under the action of the spring's own elastic force, the two ends of the reinforcing plate move into the limiting groove, thereby reducing the coil size of the four sets of tightening seats, so that the device can meet the needs of hydraulic bolts of different sizes.

[0008] Preferably, a reinforcing plate is fixedly connected between the two sets of second limiting plates. The reinforcing plate is slidably connected inside the two sets of limiting grooves. A hydraulic pump is provided on the outside of the hydraulic bolt. The hydraulic pump is located below the outer shell. The reinforcing plate cooperates with the two sets of second limiting plates. The two sets of second limiting plates are respectively located inside the two sets of tightening seats, so that the two ends of the reinforcing plate are respectively located inside the two sets of tightening seats. That is, when the tightening seats expand or shrink, the reinforcing plate can connect the gap between the two sets of tightening seats, thereby improving the fixing strength of the hydraulic bolt.

[0009] Preferably, a high-pressure hose is provided on one side of the hydraulic pump, and a reinforcing ring is fixedly connected to one end of the high-pressure hose. The reinforcing ring extends to the outer end of the high-pressure hose, and the two ends of the high-pressure hose are respectively connected to the hydraulic pump and the hydraulic cylinder. The high-pressure hose is connected to the hydraulic cylinder through the reinforcing ring, thereby improving the tightness of the connection between the two.

[0010] Preferably, a rubber pad is fixedly connected to the inner wall of the reinforcing ring, and the rubber pad is located on the outside of the high-pressure hose. One end of the hydraulic cylinder is screwed into the high-pressure hose so that its surface is in contact with the rubber pad, thereby increasing the friction between the two and thus improving the tightness of the connection.

[0011] Preferably, the reinforcing ring has a reinforcing bolt connected to its internal thread. The reinforcing bolt passes through the reinforcing ring, and a baffle is fixedly connected to one end of the reinforcing bolt. When the reinforcing bolt is screwed into the reinforcing ring, the baffle presses against one side of the reinforcing ring, thereby reducing the ring size and improving the tightness of the connection between the rubber pad and the hydraulic cylinder, which in turn improves the connection strength between the hydraulic cylinder and the hydraulic pump.

[0012] The advantages of this utility model are: pushing the four sets of positioning rods and the first limiting plate, thereby driving the four sets of tightening seats to move within the outer shell. When the four sets of tightening seats expand outward, the reinforcing plate moves outward from the limiting groove, stretching the spring. Thus, the four sets of reinforcing plates and the four sets of tightening seats cooperate to expand the coil of the four sets of tightening seats. When no external force is applied to the tightening seats, under the action of the spring's own elasticity, the two ends of the reinforcing plate move into the limiting groove, thereby reducing the coil of the four sets of tightening seats. This allows the device to meet the needs of hydraulic bolts of different sizes, thus expanding the applicability of the device.

[0013] This invention screws one end of the hydraulic cylinder into the high-pressure hose, so that its surface is in contact with the rubber pad, thereby increasing the friction between the two. Then, the reinforcing bolt is screwed into the reinforcing ring, so that the baffle squeezes one side of the reinforcing ring, thereby reducing the size of the reinforcing ring, improving the tightness of the connection between the rubber pad and the hydraulic cylinder, and thus improving the connection strength between the hydraulic cylinder and the hydraulic pump. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure;

[0016] Figure 2 This is a schematic diagram of the external structure;

[0017] Figure 3 This is a schematic diagram of the tightening assembly;

[0018] Figure 4 This is a cross-sectional view of the tightening assembly;

[0019] Figure 5 This is a schematic diagram of the connecting components.

[0020] In the diagram: 1. Hydraulic bolt; 2. Housing; 3. Support groove; 4. Positioning rod; 5. First limiting plate; 6. Threaded hole; 7. Positioning bolt; 8. Tightening seat; 9. Internal thread; 10. Limiting groove; 11. Connecting rod; 12. Spring; 13. Second limiting plate; 14. Reinforcing plate; 15. Hydraulic pump; 16. High-pressure hose; 17. Reinforcing ring; 18. Rubber pad; 19. Reinforcing bolt; 20. Baffle. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5 As shown, a hydraulic bolt tightening device includes: a hydraulic bolt 1, a housing 2 on the outer side of the hydraulic bolt 1, four sets of support grooves 3 on the housing 2, a positioning rod 4 slidably connected inside the support grooves 3, a first limiting plate 5 fixedly connected to one side of the positioning rod 4, threaded holes 6 on both the first limiting plate 5 and the housing 2, a positioning bolt 7 threadedly connected inside the threaded holes 6, and a tightening seat 8 fixedly connected to the other side of the positioning rod 4, the tightening seat 8 being located inside the housing 2, and an internal thread 9 on one side of the tightening seat 8, the internal thread 9 being threaded with the hydraulic bolt 1. The connection includes four sets of tightening seats 8, each with a limiting groove 10 inside. A connecting rod 11 is fixedly connected to the middle of each limiting groove 10. Springs 12 are fixedly connected to both sides of each connecting rod 11. A second limiting plate 13 is fixedly connected to one end of each set of springs 12. The second limiting plate 13 is slidably connected inside the limiting groove 10. A reinforcing plate 14 is fixedly connected between the two sets of second limiting plates 13. The reinforcing plate 14 is slidably connected inside the two sets of limiting grooves 10. A hydraulic pump 15 is provided on the outside of the hydraulic bolt 1. The hydraulic pump 15 is located below the outer shell 2.

[0023] Currently, adjusting the tightness of the hydraulic bolt 1 is quite cumbersome, thus requiring a hydraulic bolt tightening device. In actual use, the positioning bolt 7 is unscrewed, and then the four sets of positioning rods 4 and the first limiting plate 5 are pushed, thereby causing the four sets of tightening seats 8 to move within the outer casing 2. This allows the coil of the four sets of tightening seats 8 to be reduced or expanded. As the four sets of tightening seats 8 expand outward, the reinforcing plate 14 moves outward from the limiting groove 10, causing the second limiting plates 13 at both ends to move outward from the limiting groove 10. At the same time, the spring 12 is stretched, thereby tightening the four sets of reinforcing plates 14 and the four sets of tightening seats 8. The tight seat 8, when engaged, can improve the fixing strength of the hydraulic bolt 1. When no external force is applied to the tight seat 8, the spring 12 itself will cause the two ends of the reinforcing plate 14 to move into the limiting groove 10, thereby reducing the size of the four sets of tight seats 8. This allows the device to accommodate hydraulic bolts 1 of different sizes. When the size of the device is adjusted to the appropriate position, the positioning bolt 7 is screwed into the two sets of threaded holes 6 to fix the position of the first limiting plate 5, thereby fixing the position of the four sets of tight seats 8, making the device more stable during use.

[0024] Please see Figure 1-5 As shown, a high-pressure hose 16 is provided on one side of the hydraulic pump 15. A reinforcing ring 17 is fixedly connected to one end of the high-pressure hose 16. The reinforcing ring 17 extends to the outer end of the high-pressure hose 16. A rubber pad 18 is fixedly connected to the inner wall of the reinforcing ring 17, and the rubber pad 18 is located on the outside of the high-pressure hose 16. A reinforcing bolt 19 is threaded inside the reinforcing ring 17. The reinforcing bolt 19 passes through the reinforcing ring 17. A baffle 20 is fixedly connected to one end of the reinforcing bolt 19.

[0025] When the device is in use, one end of the high-pressure hose 16 is connected to the hydraulic pump 15, and the other end needs to be connected to the hydraulic cylinder. When the high-pressure hose 16 is connected to the hydraulic cylinder, one end of the hydraulic cylinder is screwed into the high-pressure hose 16 so that its surface is in contact with the rubber pad 18, thereby increasing the friction between the two. Then, the reinforcing bolt 19 is screwed into the reinforcing ring 17, so that the baffle 20 squeezes one side of the reinforcing ring 17, thereby reducing the loop of the reinforcing ring 17, improving the tightness of the connection between the rubber pad 18 and the hydraulic cylinder, and thus improving the connection strength between the hydraulic cylinder and the hydraulic pump 15.

[0026] Working principle: When the device is in use, one end of the high-pressure hose 16 is connected to the hydraulic pump 15, and the other end needs to be connected to the hydraulic cylinder. One end of the hydraulic cylinder is screwed into the high-pressure hose 16, so that its surface is in contact with the rubber pad 18. The reinforcing bolt 19 is screwed into the reinforcing ring 17, causing the baffle 20 to press against one side of the reinforcing ring 17, thereby reducing the loop size of the reinforcing ring 17 and improving the tightness of the connection between the rubber pad 18 and the hydraulic cylinder. The positioning bolt 7 is then unscrewed, and subsequently, the four sets of positioning rods 4 and the first limiting plate 5 are pushed, thereby causing the four sets of tightening seats 8 to move within the outer casing 2. As the four sets of tightening seats 8 expand outwards, the reinforcing plate 14 moves outwards from the limiting groove 10. By stretching the spring 12, the four sets of reinforcing plates 14 and the four sets of tightening seats 8 cooperate to improve the fixing strength of the hydraulic bolt 1. When no external force is applied to the tightening seats 8, the spring 12 itself moves the two ends of the reinforcing plates 14 into the limiting groove 10, thereby reducing the coil size of the four sets of tightening seats 8. This allows the device to accommodate hydraulic bolts 1 of different sizes. When the size of the device is adjusted to the appropriate position, the positioning bolt 7 is screwed into the two sets of threaded holes 6 to fix the position of the first limiting plate 5, thereby fixing the size of the device and making it suitable for hydraulic bolts 1 of different sizes.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A hydraulic bolt tightening / loosening device, characterized in that: include: A hydraulic bolt (1) is provided with a housing (2) on its outer side. Four sets of support grooves (3) are provided on the housing (2). A positioning rod (4) is slidably connected inside the support groove (3). A first limiting plate (5) is fixedly connected to one side of the positioning rod (4). Threaded holes (6) are provided on both the first limiting plate (5) and the housing (2). A positioning bolt (7) is threadedly connected inside the threaded hole (6). A tightening seat (8) is fixedly connected to the other side of the positioning rod (4). The tightening seat (8) is located inside the housing (2). An internal thread (9) is provided on one side of the tightening seat (8). The internal thread (9) is threadedly connected to the hydraulic bolt (1). A limiting groove (10) is provided inside each of the four sets of tightening seats (8). A connecting rod (11) is fixedly connected in the middle of each limiting groove (10).

2. A hydraulic bolt tensioner as claimed in claim 1, wherein: Both sides of the connecting rod (11) are fixedly connected with springs (12), and one end of each set of springs (12) is fixedly connected with a second limiting plate (13). The second limiting plate (13) is slidably connected inside the limiting groove (10).

3. A hydraulic bolt tensioner as claimed in claim 2, wherein: A set of reinforcing plates (14) is fixedly connected between the two sets of second limiting plates (13). The set of reinforcing plates (14) is slidably connected inside the two sets of limiting grooves (10). A hydraulic pump (15) is provided on the outside of the hydraulic bolt (1). The hydraulic pump (15) is located below the outer shell (2).

4. A hydraulic bolt tightening device according to claim 3, characterized in that: A high-pressure hose (16) is provided on one side of the hydraulic pump (15), and a reinforcing ring (17) is fixedly connected to one end of the high-pressure hose (16), with the reinforcing ring (17) extending to the outer end of the high-pressure hose (16).

5. A hydraulic bolt tightening device according to claim 4, characterized in that: The inner wall of the reinforcing ring (17) is fixedly connected to a rubber pad (18), and the rubber pad (18) is located on the outside of the high-pressure hose (16).

6. A hydraulic bolt tightening device according to claim 5, characterized in that: The reinforcing ring (17) is internally threaded with a reinforcing bolt (19), which passes through the reinforcing ring (17). One end of the reinforcing bolt (19) is fixedly connected to a baffle (20).

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