Fortress hydraulic wrench

Abstract

The utility model discloses a castle type hydraulic wrench, including the casing, the inner round hole of casing is equipped with the cylinder sleeve, the casing is equipped with the piston assembly in the cylinder sleeve hole, and the inner end of piston assembly is through the drive pin shaft and the left drive board and the right drive board swing joint of both sides, be equipped with the pawl between left drive board with right drive board, be equipped with the pawl spring in the pawl inside groove. The utility model discloses a special drive castle cover is set up, realizes accurate firm connection with castle type nut, and its inside adopts hydraulic drive piston, drives the transmission mechanism of pawl and ratchet wheel engagement, realizes the motorization fastening of bolt, ensures the even accurate and high efficiency of fastening torque. Meanwhile, the integrated counterforce system provides stable support for operation, effectively offsets the reaction torque, and guarantees the operation safety. The application has the advantages of speciality, high efficiency and high precision, and can perfectly satisfy the locking requirement of castle type stretch nut under special working conditions.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic wrench technology, specifically to a castle-type hydraulic wrench. Background Technology

[0002] In the connection of critical equipment such as heavy machinery, wind power, and large pressure vessels, castle-type tension nuts with cotter pin locking holes are often used to ensure the absolute reliability of bolted connections under severe vibration. Tightening these nuts requires applying a huge and precise preload. Currently, traditional hydraulic wrenches are commonly used on-site, but their standard sockets are severely mismatched with the annular groove and special outer structure of the castle-type nut, resulting in ineffective tightening. During operation, slippage occurs between the socket and the nut, not only failing to achieve the designed tightening torque but also severely damaging the nut's edges and workpiece, posing a significant safety hazard.

[0003] There is currently no effective solution to the above problems. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model proposes a castle-type hydraulic wrench, which can overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows: A castle-style hydraulic wrench includes a housing, an inner circular hole of the housing having a cylinder liner, and a piston assembly being provided in the inner hole of the cylinder liner. The inner end of the piston assembly is movably connected to a left drive plate and a right drive plate on both sides via a drive pin. A pawl is provided between the left drive plate and the right drive plate. A pawl spring is provided in the groove inside the pawl. One end of the pawl spring is fixed to the pawl by a fixing pin one, and the other end of the pawl spring is fixed to the left drive plate and the right drive plate by a fixing pin two. A ratchet is provided at the bottom circular hole of the left drive plate and the right drive plate. A reaction force lever is provided in the inclined groove inside the housing. The two sides of the housing are fixed to the reaction force lever by fixing screws passing through the inner holes of the left and right levers. A reaction force lever spring is provided in the middle hole of the reaction force lever. One end of the reaction force lever spring is fixed to the reaction force lever by a fixing pin three, and the other end of the reaction force lever spring is fixed to the housing.

[0006] Furthermore, a rotating assembly is provided on the top of the housing, and a quick-connect fitting for connecting to an oil pipe is provided on the side of the rotating assembly.

[0007] Furthermore, the fixing pin secures the pawl spring and the pawl by inserting the pawl into a ring that passes through the pawl spring.

[0008] Furthermore, the second fixing pin passes through the ring at the other end of the pawl spring and is fixed at both ends to the left drive plate and the right drive plate, respectively.

[0009] Furthermore, the other end of the reaction spring is inserted into the oblique circular hole at the lower left end of the housing and fixed by a fixing pin four, which is engaged in the groove at the lower left end of the housing.

[0010] Furthermore, the housing is provided with plugs on both sides of the drive pin.

[0011] Furthermore, a protective cover is provided on the outside of the housing, and the protective cover is fixed to the housing by two fixing screws.

[0012] Furthermore, the ratchet inner hole is provided with a drive castle sleeve, the drive castle sleeve is provided with a reaction shaft, one end of the reaction shaft is fitted with a retainer, the retainer is connected and fixed to the reaction shaft by a fixing screw, and the external spline of the retainer is inserted into the spline hole inside the housing for cooperation and fixation.

[0013] The beneficial effects of this invention are as follows: By using a dedicated drive sleeve, this invention achieves a precise and secure connection with the castle-type nut. Internally, a hydraulically driven piston drives a transmission mechanism that engages a pawl and a ratchet, enabling motorized bolt tightening and ensuring uniform, precise, and efficient tightening torque. Simultaneously, the integrated reaction force system provides stable support for the operation, effectively counteracting the reaction torque and ensuring operational safety. This invention combines the advantages of specialization, high efficiency, and high precision, perfectly meeting the locking requirements of castle-type tension nuts under special working conditions. 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 embodiments 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 structural diagram of the castle-type hydraulic wrench according to an embodiment of the present utility model; Figure 2 This is the castle-type hydraulic wrench according to the embodiments of this utility model. Figure 1 AA section view; Figure 3 This is a right view of the castle-type hydraulic wrench according to an embodiment of the present utility model; Figure 4 This is a left view of the castle-type hydraulic wrench according to an embodiment of the present utility model; Figure 5 This is an exploded view of the use of the castle-type hydraulic wrench according to an embodiment of the present utility model; In the diagram: 1. Housing; 2. Ratchet; 3. Pad; 401. Left drive plate; 402. Right drive plate; 5. Drive pin; 6. Pad spring; 7. Fixed pin one; 18. Fixed pin two; 9. Piston assembly; 10. Cylinder liner; 11. Reaction lever; 1201. Left lever; 1202. Right lever; 13. Fixing screw one; 14. Fixed pin three; 15. Reaction lever spring; 16. Fixed pin four; 17. Protective element. 18. Cover; 29. ​​Fixing screws; 20. Rotating assembly; 21. Quick connector; 22. Drive castle sleeve; 23. Reaction shaft; 24. Fixing device; 25. Fixing screw; 26. Plug; 27. Oil return chamber; 28. Oil inlet chamber; 29. ​​Engaging teeth; 30. Engaging surface; 31. Oil pipe; 31. Castle-type tension nut; 3101. Castle-type tension nut castle sleeve; 3102. Castle-type tension nut mandrel; 3103. Bolt. Detailed Implementation

[0016] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0017] like Figure 1-5 As shown, a castle-type hydraulic wrench according to an embodiment of the present utility model includes a housing 1, a cylinder liner 10 is provided in the inner circular hole of the housing 1, and a piston assembly 9 is provided in the inner hole of the cylinder liner 10. The inner end of the piston assembly 9 is movably connected to the left drive plate 401 and the right drive plate 402 on both sides through a drive pin 5. A pawl 3 is provided between the left drive plate 401 and the right drive plate 402. A pawl spring 6 is provided in the groove inside the pawl 3. One end of the pawl spring 6 is fixed to the pawl 3 by a fixing pin 7, and the other end of the pawl spring 6 is fixed to the left drive plate 401 and the right drive plate 402 by a fixing pin 8. A ratchet 2 is provided at the bottom circular hole of the left drive plate 401 and the right drive plate 402. A reaction lever 11 is provided in the inclined groove inside the housing 1. The two sides of the housing 1 are fixed to the reaction lever 11 by fixing screws 13 passing through the inner holes of the left lever 1201 and the right lever 1202. A reaction lever spring 15 is provided in the middle hole of the reaction lever 11. One end of the reaction lever spring 15 is fixed to the reaction lever 11 by a fixing pin 3 14, and the other end of the reaction lever spring 15 is fixed to the housing 1.

[0018] Preferably, the housing 1 has a rotating assembly 19 on its top, and the rotating assembly 19 has a quick-connect fitting 20 on its side for connecting to an oil pipe.

[0019] Preferably, the fixing pin 7 fixes the pawl spring 6 and the pawl 3 by inserting the pawl 3 into a ring that passes through the pawl spring 6.

[0020] Preferably, the fixing pin 8 passes through the ring at the other end of the pawl spring 6 and is fixed at both ends to the left drive plate 401 and the right drive plate 402, respectively.

[0021] Preferably, the other end of the reaction spring 15 is inserted into the oblique circular hole at the lower left end of the housing 1 and fixed by a fixing pin 16, which is engaged in the groove at the lower left end of the housing 1.

[0022] Preferably, the housing 1 is provided with plugs 25 on both sides of the drive pin 5.

[0023] Preferably, the outer side of the housing 1 is provided with a protective cover 17, which is fixed to the housing 1 by fixing screws 18.

[0024] Preferably, the ratchet 2 has a drive castle sleeve 21 in its inner hole, and a reaction shaft 22 is provided inside the drive castle sleeve 21. A retainer 23 is sleeved on one end of the reaction shaft 22. The retainer 23 is connected and fixed to the reaction shaft 22 by a fixing screw 24. The spline of the retainer 23 is inserted into the spline hole inside the housing 1 for cooperation and fixation.

[0025] To facilitate understanding of the above-mentioned technical solutions of this utility model, the following detailed description of the above-mentioned technical solutions of this utility model is provided through specific usage methods.

[0026] In practical use, the castle-type hydraulic wrench according to this utility model has a housing 1, a rotating assembly 19 on the housing, a quick connector 20 connected to one side of the rotating assembly and connected to the oil pipe, a cylinder liner 10 in the inner hole of the housing 1, a piston assembly 9 in the inner hole of the cylinder liner 10, the piston assembly 9 being connected to the left drive plate 401 and the right drive plate 402 via a drive pin 5, a pawl 3 in the small round hole between the left drive plate 401 and the right drive plate 402, a pawl spring 6 in the groove inside the pawl 3, and a fixing pin 7 inserted into the small hole of the pawl 3, passing through the ring of the pawl spring 6 to fix it to the pawl spring 6 and the pawl 3. Fixed pin 2 8 passes through the other end of the pawl spring 6 and is fixed to both ends of the left drive plate 401 and right drive plate 402. A ratchet 2 is provided at the large circular hole in the middle of the left drive plate 401 and right drive plate 402. A reaction lever 11 is provided in the inclined groove inside the housing 1. Fixed screws 13 pass through the inner holes of the left lever 1201 and right lever 1202 on both sides and are fixed to the reaction lever 11. A reaction lever spring 15 is provided in the large hole in the middle of the reaction lever 11. Fixed pin 3 14 passes through the small hole in the middle part of the reaction lever 11 and fixes the reaction lever 11 and the reaction lever spring 15. 15 The other end is inserted into the oblique round hole at the lower left end of the housing 1 and fixed with the fixing pin 16. The fixing pin 16 is stuck in the groove at the lower left end of the housing 1. The housing 1 has plugs 25 on both sides and a protective cover 17 on the outside. The fixing screw 18 fixes the protective cover to the housing 1. The ratchet 2 has a drive castle sleeve 21 in the inner hole. The drive castle sleeve 21 has a reaction shaft 22 in the inner hole. One end of the reaction shaft 22 is fitted with a retainer 23. The center of the retainer 23 has a fixing screw 24. The retainer 23 and the reaction shaft 22 are connected and fixed. The spline of the retainer 23 is inserted into the spline hole in the housing 1 for cooperation and fixation.

[0027] The specific implementation plan is as follows: 1. Insert the oil pipe into the quick-connect fitting 22 of the castle-style hydraulic wrench and ensure that the connection is secure.

[0028] 2. Place the castle-type hydraulic wrench on the castle-type tension nut under working conditions, with the reaction shaft 22 inserted into the spline inside the mandrel of the castle-type tension nut. Use the fine-tuning wrench to drive the castle sleeve 21 so that it is properly installed in conjunction with the castle sleeve of the castle tension nut.

[0029] 3. The hydraulic wrench begins to work: When oil is introduced, hydraulic oil flows into the oil inlet chamber through the quick-connect fitting 20, the rotating assembly 19 and the oil passage of the housing 1, and applies a thrust to the piston assembly 9. The piston assembly 9 pushes the drive pin 5 to drive the left drive plate 401, the right drive plate 402 and the pawl 3 to move. The pawl 3 pushes the ratchet 2 to move clockwise. At the same time, the reaction force lever 11 is stretched by the reaction force lever spring 15 and puts on the meshing teeth to complete the process. During the return stroke, hydraulic oil flows into the return oil chamber through the quick-connect fitting 20, the rotating assembly 19, and the oil passage of the housing 1, and applies a thrust to the piston assembly 9. The piston assembly 9 pulls the drive pin 5, which drives the left drive plate 401, the right drive plate 402, and the pawl 3 to perform a return stroke. Under the tension of the reaction force lever 11, the reaction force lever spring 15 presses against the meshing tooth surface of the ratchet 2 to prevent the ratchet 2 from rotating. The pawl 3 disengages from the meshing teeth and rests on the meshing teeth of the next stroke, completing the return stroke.

[0030] The reciprocating motion of the hydraulic wrench causes the castle-like tension nut and bolt to tighten.

[0031] In summary, by utilizing the above-mentioned technical solution of this utility model, a precise and secure connection with the castle-type nut is achieved through the use of a dedicated drive castle sleeve. Internally, a hydraulically driven piston drives a transmission mechanism that engages a pawl and a ratchet, enabling motorized bolt tightening and ensuring uniform, precise, and efficient tightening torque. Simultaneously, the integrated reaction force system provides stable support for the operation, effectively counteracting the reaction torque and ensuring operational safety. This invention combines the advantages of specialization, high efficiency, and high precision, perfectly meeting the locking requirements of castle-type tension nuts under special working conditions.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A castle-type hydraulic wrench, characterized in that, Includes a housing (1), the inner hole of the housing (1) is provided with a cylinder liner (10), the housing (1) is provided with a piston assembly (9) in the inner hole of the cylinder liner (10), and the inner end of the piston assembly (9) is movably connected to the left drive plate (401) and the right drive plate (402) on both sides through a drive pin (5); A pawl (3) is provided between the left drive plate (401) and the right drive plate (402). A pawl spring (6) is provided in the groove inside the pawl (3). One end of the pawl spring (6) is fixed to the pawl (3) by a fixing pin (7). The other end of the pawl spring (6) is fixed to the left drive plate (401) and the right drive plate (402) by a fixing pin (8). A ratchet (2) is provided at the bottom circular hole of the left drive plate (401) and the right drive plate (402). The housing (1) has a counterforce lever (11) in the inclined groove. The housing (1) is fixed to the counterforce lever (11) by fixing screws (13) passing through the inner holes of the left lever (1201) and the right lever (1202). The counterforce lever (11) has a counterforce lever spring (15) in the middle hole. One end of the counterforce lever spring (15) is fixed to the counterforce lever (11) by fixing pin (14), and the other end of the counterforce lever spring (15) is fixed to the housing (1).

2. The castle-type hydraulic wrench according to claim 1, characterized in that, The housing (1) has a rotating assembly (19) on its top, and the rotating assembly (19) has a quick-connect fitting (20) on its side for connecting to the oil pipe.

3. The castle-type hydraulic wrench according to claim 1, characterized in that, The fixing pin (7) fixes the pawl spring (6) and the pawl (3) by inserting the pawl (3) through the ring of the pawl spring (6).

4. The castle-type hydraulic wrench according to claim 1, characterized in that, The second fixed pin (8) passes through the ring at the other end of the pawl spring (6) and is fixed at both ends to the left drive plate (401) and the right drive plate (402) respectively.

5. The castle-type hydraulic wrench according to claim 1, characterized in that, The other end of the reaction spring (15) is inserted into the oblique circular hole at the lower left end of the housing (1) and fixed by the fixing pin four (16), which is engaged in the groove at the lower left end of the housing (1).

6. The castle-type hydraulic wrench according to claim 1, characterized in that, The housing (1) has plugs (25) on both sides of the drive pin (5).

7. The castle-type hydraulic wrench according to claim 1, characterized in that, The outer side of the housing (1) is provided with a protective cover (17), which is fixed to the housing (1) by fixing screws (18).

8. The castle-type hydraulic wrench according to claim 1, characterized in that, The ratchet (2) has a drive castle sleeve (21) in its inner hole. The drive castle sleeve (21) has a reaction shaft (22) inside. One end of the reaction shaft (22) is fitted with a retainer (23). The retainer (23) is connected and fixed to the reaction shaft (22) by a fixing screw (24). The spline of the retainer (23) is inserted into the spline hole inside the housing (1) for fixing.

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