Hydraulic sliding and tightening tool

Abstract

The utility model belongs to the technical field of pipeline connecting tools, and particularly relates to a hydraulic sliding tightening tool which comprises a sliding tightening device. The hydraulic device is movably connected with the sliding tight device; the sliding and tightening device comprises a fixed seat, a sliding block, a sliding block and a sliding block, the middle of the transmission mechanism is hinged to the upper end of the supporting arm; the sliding and tightening mechanism is hinged to the upper end of the transmission mechanism; the driving rod is movably mounted in the fixed seat, and the lower end of the driving rod is connected into the hydraulic device; an arc-shaped guide surface I is formed on the outer wall of the lower end of the rotating arm I; an arc-shaped guide surface II is formed on the outer wall of the lower end of the rotating arm II; the middle of the first rotating arm and the middle of the second rotating arm are hinged to the upper end of the supporting arm in a crossed mode, and the first arc-shaped guide face and the second arc-shaped guide face abut against the driving rod in a sliding mode. The driving rod moves up and down, so that the end of the first rotating arm and the end of the second rotating arm are close to each other, the sliding tightening mechanism is driven to conduct sliding tightening operation, and the tool can work in a narrow space.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection tools, in particular to a hydraulic sliding tool. Background Art

[0002] The sliding tool is a tool used for pipe connection. It can provide powerful power and precise control, making the sliding connection faster, more efficient and more reliable. In pipeline installation and maintenance, the sliding connection has become a common connection method, which can achieve a fast, firm and reliable connection between pipe fittings and pipes.

[0003] For example, Chinese patent publication number CN219788194U discloses an electric sliding and tightening tool, which includes an oil pump device, a drive device, a hydraulic device and a working head device. Under the action of a piston rod, a chuck 1 cooperates with a chuck 2 on a guide tube to complete the sliding and tightening operation of the pipe fitting.

[0004] The sliding tightening tool has some shortcomings. It cannot be used in a narrow space. Since one set of chucks is arranged on the guide tube and the second chuck is fixed to the front end of the guide tube, the sliding tightening tool needs to be used in a scene that can at least accommodate the length of the guide tube. In some narrow spaces such as the corners of a room, when the guide tube cannot be put into the operating space, the sliding tightening tool will not be able to be used, and the usage scenario is limited. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic sliding tool, in which the middle part of rotating arm one and the middle part of rotating arm two are cross-hinged at the upper end of the support arm, and the driving rod makes the ends of rotating arm one and rotating arm two approach each other, thereby realizing the sliding operation of the sliding mechanism and improving the problem that the sliding tool cannot be used in a narrow space.

[0006] The purpose of the utility model is achieved in this way:

[0007] A hydraulic tightening tool, comprising:

[0008] Sliding tightening device;

[0009] A hydraulic device, which is movably connected to a sliding tightening device;

[0010] The sliding and tightening device is driven by a hydraulic device to perform sliding and tightening operations;

[0011] Wherein, the sliding tightening device comprises:

[0012] A fixed seat, which is movably connected to the hydraulic device and has support arms formed opposite to each other on the fixed seat;

[0013] A transmission mechanism, the middle part of which is hinged to the upper end of the support arm;

[0014] A sliding and tightening mechanism, which is hinged to the upper end of the transmission mechanism;

[0015] A driving rod is movably mounted in a fixing seat, the lower end of the driving rod passes through the fixing seat and is movably connected in the hydraulic device, and the upper end of the driving rod is in sliding contact with the outer wall of the lower end of the transmission mechanism;

[0016] The transmission mechanism at least comprises:

[0017] A rotating arm, the outer wall of which has a lower end formed with an arc-shaped guide surface;

[0018] The second rotating arm has a second arc-shaped guide surface formed on the outer wall of the lower end thereof;

[0019] The middle part of the rotating arm 1 and the middle part of the rotating arm 2 are cross-hinged at the upper end of the supporting arm, and the arc-shaped guide surface 1 and the arc-shaped guide surface 2 are slidably abutted against the driving rod;

[0020] The driving rod is moved up and down so that the ends of the rotating arm 1 and the rotating arm 2 are brought close to each other, thereby driving the sliding and tightening mechanism to perform the sliding and tightening operation.

[0021] Preferably, the sliding and tightening mechanism comprises:

[0022] A sliding arm 1 is hinged to the upper end of the rotating arm 1, and a clamping claw 1 is formed on the upper end of the sliding arm 1;

[0023] The second sliding arm is hinged to the upper end of the second rotating arm, and the upper end of the second sliding arm is formed with a second clamping claw;

[0024] When the ends of the rotating arm 1 and the rotating arm 2 approach each other, the clamping claw 1 and the clamping claw 2 approach each other.

[0025] Preferably, a support portion 1 is provided on the rotating arm 1, and a sliding portion 1 is formed at the lower end of the sliding arm 1.

[0026] The second rotating arm is provided with a second supporting part, and the lower end of the second sliding arm is formed with a second sliding part.

[0027] When the clamping claw 1 and the clamping claw 2 are close to each other to perform a sliding and tightening operation, the support part 1 movably abuts against the inner side wall of the sliding part 2, and the support part 2 movably abuts against the inner side wall of the sliding part 1.

[0028] Preferably, a cross arm is formed at the upper end of the driving rod, and a sliding member 1 and a sliding member 2 are respectively provided at both ends of the cross arm; the arcuate guide surface 1 slidably abuts against the sliding member 1, and the arcuate guide surface 2 slidably abuts against the sliding member 2.

[0029] Preferably, a limiting member 1 is hingedly connected to the middle of the rotating arm 1, and the limiting member 1 movably abuts against the outer side wall of the sliding part 2 to limit the rotation of the sliding arm 2;

[0030] A limiting member 2 is hingedly connected to the middle portion of the second rotating arm, and the limiting member 2 movably abuts against the outer side wall of the first sliding portion to limit the rotation of the first sliding arm.

[0031] Preferably, a protective shell is provided on the outer side of the fixing seat, a shielding member 1 is provided at the lower end of the limiting member 1, and a shielding member 2 is provided at the lower end of the limiting member 2, and the lower ends of the shielding member 1 and the shielding member 2 extend into the protective shell.

[0032] Preferably, a torsion spring is provided at the hinged joint of the middle portion of the rotating arm 1 and the middle portion of the rotating arm 2, and two ends of the torsion spring abut against the sliding arm 1 and the sliding arm 2 respectively.

[0033] Preferably, an annular groove is provided on the outer side wall of the upper end of the hydraulic device, and a through hole is provided on the lower side wall of the fixing seat. A limiting member three is connected in the through hole, and the limiting member three is movably placed in the annular groove to realize the rotation of the sliding device on the hydraulic device.

[0034] Preferably, the hydraulic device at least comprises:

[0035] A hydraulic cylinder, which is movably connected to the lower end of the fixing seat, and has a mounting cavity for the lower end of the driving rod to extend into, and the outer wall of the upper end of the hydraulic cylinder is provided with the annular groove;

[0036] A piston is sealingly and slidably disposed in the mounting cavity and cooperates with the hydraulic cylinder to form an oil cavity, and the oil cavity is provided with an oil inlet hole, and the piston is movably abutted against the lower end of the driving rod;

[0037] The hydraulic oil enters the oil cavity from the oil inlet hole, causing the piston to slide in the installation cavity, thereby pushing the drive rod to extend out of the installation cavity, thereby realizing the sliding and tightening operation of the sliding and tightening device.

[0038] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0039] The sliding and tightening tool designed by the utility model can be used in a narrow space. The driving rod is moved to drive the rotating arm one and the rotating arm two to rotate around the hinge. The ends of the rotating arm one and the rotating arm two are close to each other, so that the sliding and tightening mechanism completes the sliding and tightening connection operation. The middle part of the rotating arm one and the middle part of the rotating arm two are cross-hinged at the upper end of the support arm, which reduces the space occupied by the transmission mechanism, thereby making operation in a narrow space more convenient, and facilitating storage and carrying, and is suitable for fast and efficient operation in a limited space. At the same time, the support arm is integrally formed on the fixed seat, which can make the transmission mechanism more stable when working at high intensity, improve the durability and reliability of the tool, and bring more convenience and safety to the user in actual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the utility model.

[0041] Figure 2 It is a cross-sectional view of the sliding tightening device and the hydraulic device of the utility model.

[0042] Figure 3 It is a structural schematic diagram of the sliding tightening device of the utility model.

[0043] Figure 4 It is a structural schematic diagram of the sliding tightening device of the utility model without a fixed seat.

[0044] Figure 5 It is an exploded view of the sliding tightening device of the utility model.

[0045] Figure 6 It is a structural schematic diagram of the transmission mechanism of the utility model.

[0046] Figure 7 It is a structural schematic diagram of a sliding arm of the utility model installed on a transmission mechanism.

[0047] Figure 8 It is a structural schematic diagram of the hydraulic cylinder of the utility model.

[0048] Figure numerals: 1, sliding device; 11, fixed seat; 111, support arm; 112, through hole; 113, limiter three; 12, driving rod; 121, cross arm; 122, sliding member one; 123, sliding member two; 2, transmission mechanism; 21, rotating arm one; 211, arc-shaped guide surface one; 212, supporting part one; 213, limiter one; 214, shielding member one; 22, rotating arm two; 221, arc-shaped guide surface two; 222, supporting part two; 223, limiter two ; 224, shielding member 2; 23, torsion spring; 3, sliding mechanism; 31, sliding arm 1; 311, clamping claw 1; 312, sliding part 1; 32, sliding arm 2; 321, clamping claw 2; 322, sliding part 2; 4, protective shell; 5, hydraulic device; 51, hydraulic cylinder; 511, mounting cavity; 512, oil cavity; 513, oil inlet hole; 514, ring groove; 52, piston; 53, spring; 6, driving device; 71, pin 1; 72, pin 4; 73, pin 5. DETAILED DESCRIPTION

[0049] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0050] like Figure 1 As shown, a hydraulic tightening tool comprises: a tightening device 1 and a hydraulic device 5. The hydraulic device 5 is movably connected to the tightening device 1, and the tightening device 1 is driven by the hydraulic device 5 to perform a fast, firm and reliable connection operation between the pipe fitting and the pipe.

[0051] Combination Figures 2 to 6The sliding device 1 includes: a fixed seat 11, a transmission mechanism 2, a sliding mechanism 3 and a driving rod 12. The fixed seat 11 is movably connected to the hydraulic device 5, and a support arm 111 is formed opposite to the fixed seat 11, and the support arm 111 is integrally formed with the fixed seat 11; the middle part of the transmission mechanism 2 is hinged to the upper end of the support arm 111; the sliding mechanism 3 is hinged to the upper end of the transmission mechanism 2; the driving rod 12 is movably installed in the fixed seat 11, and the lower end of the driving rod 12 passes through the fixed seat 11 and is movably connected to the hydraulic device 5. The driving rod 12 can move up and down in the fixed seat 11, and the upper end of the driving rod 12 is in sliding contact with the outer wall of the lower end of the transmission mechanism 2.

[0052] Combination Figure 5 and Figure 6 The transmission mechanism 2 at least comprises: a rotating arm 1 21 and a rotating arm 22. The lower end outer wall of the rotating arm 1 21 is formed with an arc-shaped guide surface 1 211; the lower end outer wall of the rotating arm 22 is formed with an arc-shaped guide surface 221; the middle part of the rotating arm 1 21 and the middle part of the rotating arm 22 are cross-hinged at the upper end of the support arm 111, and the arc-shaped guide surface 1 211 and the arc-shaped guide surface 221 are slidably abutted against the driving rod 12; the driving rod 12 moves up and down, so that the upper ends of the rotating arm 1 21 and the rotating arm 2 22 are close to each other, thereby driving the sliding mechanism 3 to perform the sliding operation.

[0053] The upper end of the support arm 111 is hinged between the rotating arm 21 and the rotating arm 22 through the pin shaft 71. The rotating arm 21 and the rotating arm 22 rotate with the pin shaft 71 as the center. The rotating arm 21 and the rotating arm 22 can rotate in some narrow spaces, so that the transmission mechanism 2 can be adapted to different spaces and the operation is more convenient.

[0054] In the present embodiment, two rotating arms 1 21 and two rotating arms 22 are used. The two rotating arms 1 21 are connected together by a pin 2, and the two rotating arms 22 are connected together by a pin 3. The side wall of the pin 2 is the support part 1 212 described below, and the side wall of the pin 3 is the support part 2 222 described below.

[0055] Combination Figures 2 to 5 The sliding mechanism 3 includes: a sliding arm 1 31 and a sliding arm 2 32; the sliding arm 1 31 is hinged at the upper end of the rotating arm 1 21, and a clamping claw 1 311 is formed at the upper end of the sliding arm 1 31; the sliding arm 2 32 is hinged at the upper end of the rotating arm 22, and a clamping claw 2 321 is formed at the upper end of the sliding arm 2 32; the clamping claw 1 311 and the clamping claw 2 321 are both U-shaped grooves for clamping the pipe fitting and the pipe; when the ends of the rotating arm 1 21 and the rotating arm 22 are close to each other, the clamping claw 1 311 and the clamping claw 2 321 are close to each other, so as to connect the pipe fitting and the pipe together.

[0056] In this solution, the sliding arm 1 31 is hinged to the upper end of the rotating arm 1 21 through the pin 4 72, and the sliding arm 2 32 is hinged to the upper end of the rotating arm 2 22 through the pin 5 73. When the rotating arm 1 21 and the rotating arm 22 approach each other, the clamping claw 1 311 and the clamping claw 2 321 pull the pipe and the pipe fitting and approach each other through the pin 4 72 and the pin 5 73.

[0057] Combination Figure 2 , Figure 5 and Figure 7 A support portion 212 is provided on the rotating arm 21, a sliding portion 312 is formed at the lower end of the sliding arm 31, a support portion 222 is provided on the rotating arm 22, and a sliding portion 322 is formed at the lower end of the sliding arm 32. When the clamping claw 311 and the clamping claw 321 approach each other to perform a sliding operation, the support portion 212 movably abuts against the inner side wall of the sliding portion 322, and the support portion 222 movably abuts against the inner side wall of the sliding portion 312.

[0058] When the clamping claw 1 311 and the clamping claw 2 321 approach each other, the support part 1 212 applies an outward force to the inner wall of the sliding part 2 322, and the support part 222 also applies an outward force to the inner wall of the sliding part 1 312, so that the clamping claw 1 311 and the clamping claw 2 321 have a tendency to approach each other, thereby enabling the pipes and pipe fittings to approach each other and slide tightly.

[0059] The upper ends of the inner side walls of sliding part 1 312 and sliding part 2 322 are both formed with limiting protrusions, which can respectively abut against pin shaft 4 72 and pin shaft 5 73, thereby limiting the maximum range in which sliding arm 1 31 and sliding arm 2 32 move away from each other when the torsion spring 23 is reset below.

[0060] The upper end of the driving rod 12 is formed with a cross arm 121, and two ends of the cross arm 121 are respectively oppositely provided with a sliding member 122 and a sliding member 2 123; the sliding member 122 and the sliding member 2 123 can be rollers or bearings, and can also be balls; the arcuate guide surface 1 211 slides against the sliding member 122, and the arcuate guide surface 2 221 slides against the sliding member 2 123. The sliding member 122 and the sliding member 2 123 are used to reduce the friction of the arcuate guide surface 1 211 and the arcuate guide surface 2 221 on the driving rod 12, and at the same time, the sliding of the arcuate guide surface 1 211 on the sliding member 122 and the sliding of the arcuate guide surface 2 221 on the sliding member 2 123 can realize the rotation of the rotating arm 1 21 and the rotating arm 2 22 with the pin shaft 1 71 as the center of the circle.

[0061] Combination Figures 2 to 5A limiting member 213 is hingedly connected to the middle part of the rotating arm 21, and the limiting member 213 movably abuts against the outer wall of the sliding part 322 to limit the rotation of the sliding arm 32; a limiting member 223 is hingedly connected to the middle part of the rotating arm 22, and the limiting member 223 movably abuts against the outer wall of the sliding part 312 to limit the rotation of the sliding arm 31.

[0062] In this solution, the limit member 1 213 is hinged on the pin shaft 2, the limit member 223 is hinged on the pin shaft 3, the lower end of the sliding part 2 322 extends between the limit member 1 213 and the pin shaft 2, and the lower end of the sliding part 1 312 extends between the limit member 223 and the pin shaft 3, thereby limiting the rotation range of the sliding arm 1 31 and the sliding arm 2 32 and reducing the rotation of the sliding arm 1 31 and the sliding arm 2 32.

[0063] Combination Figure 1 and Figure 5 The outer side of the fixing seat 11 is provided with a protective shell 4, the lower end of the limiting member 1 213 is provided with a shielding member 1 214, and the lower end of the limiting member 223 is provided with a shielding member 224, and the lower ends of the shielding member 1 214 and the shielding member 2 224 extend into the protective shell 4. The shielding member 1 214 prevents hands or other objects from entering between the arc-shaped guide surface 1 211 and the sliding member 1 122, and prevents the arc-shaped guide surface 1 211 from being clamped when sliding on the sliding member 1 122, thereby affecting the sliding of the arc-shaped guide surface 1 211, and making it safer to use. The shielding member 2 224 is the same as the shielding member 1 214.

[0064] A torsion spring 23 is provided at the hinged joint between the middle of the rotating arm 1 21 and the middle of the rotating arm 2 22 (i.e., the torsion spring 23 is sleeved on the pin shaft 1 71), and the two ends of the torsion spring 23 respectively abut against the sliding arm 1 31 and the sliding arm 2 32. The sliding arm 1 31 and the sliding arm 2 32 are separated from each other by the torsion spring 23, and because the limiting member 1 213 movably abuts against the outer wall of the sliding part 2 322, and the limiting member 223 movably abuts against the outer wall of the sliding part 1 312, the torsion spring 23 makes the upper ends of the rotating arm 1 21 and the rotating arm 2 22 separate from each other, and finally achieves reset.

[0065] An annular groove 514 is provided on the outer side wall of the upper end of the hydraulic device 5, and a through hole 112 is provided on the lower side wall of the fixing seat 11. A limiting member 3 113 is connected inside the through hole 112. The limiting member 3 113 is a screw. The limiting member 3 113 is movably placed in the annular groove 514 to realize the rotation of the sliding device 1 on the hydraulic device 5.

[0066] Combination Figure 2 and Figure 8The fixing seat 11 is threadedly connected to the upper end of the hydraulic device 5, and the annular groove 514 is a strip groove. The distance between the strip groove and the upper end of the hydraulic cylinder 51 is gradually reduced. When the fixing seat 11 rotates at the upper end of the hydraulic device 5, the limit member three 113 can slide in the strip groove, and the limit member three 113 prevents the fixing seat 11 from detaching from the upper end of the hydraulic device 5 after rotation.

[0067] like Figure 2 As shown, the hydraulic device 5 includes: a hydraulic cylinder 51, which is movably connected to the lower end of the fixed seat 11, and the hydraulic cylinder 51 has a mounting cavity 511 for the lower end of the driving rod 12 to extend into, and the outer wall of the upper end of the hydraulic cylinder 51 is provided with the above-mentioned annular groove 514; a piston 52, which is sealingly slidably arranged in the mounting cavity 511, and cooperates with the hydraulic cylinder 51 to form an oil cavity 512, and the oil cavity 512 is provided with an oil inlet hole 513, and the piston 52 is movably abutted against the lower end of the driving rod 12; a hydraulic pump, which is connected to the lower end of the hydraulic cylinder 51, and is used to transport hydraulic oil from the oil inlet hole 513 into the oil cavity 512, so that the piston 52 slides in the mounting cavity 511, thereby pushing the driving rod 12 to extend out of the mounting cavity 511, thereby realizing the sliding and tightening operation of the sliding device 1.

[0068] The upper end of the hydraulic cylinder 51 is threadedly connected to a connecting seat, and the upper end of the connecting seat abuts the lower end of the fixed seat 11. A spring 53 is arranged in the mounting cavity 511. The lower end of the driving rod 12 is connected to a convex ring by a screw. The spring 53 is sleeved on the driving rod 12. The two ends of the spring 53 abut the convex ring and the lower end of the connecting seat. The spring 53 pushes the driving rod 12 to move downward, thereby causing the piston 52 to move downward, thereby discharging the hydraulic oil in the oil chamber 512. A limiting groove is provided at the upper end of the piston 52, and the convex ring is movably placed in the limiting groove, so that the position between the driving rod 12 and the piston 52 is stable.

[0069] The specific structure of the hydraulic device 5 can be found in the description of Chinese Patent Publication No. CN116641885A, which will not be described here.

[0070] The lower end of the hydraulic device 5 is connected to a driving device 6, which includes a motor and a reducer. The motor drives the reducer to make the hydraulic pump work, and the hydraulic pump transports the hydraulic oil from the oil inlet hole 513 to the oil chamber 512. The specific structure of the driving device 6 can refer to the description of Chinese patent publication No. CN219788194U, that is, channel three is connected to the oil inlet hole 513 in this article, which will not be repeated here.

[0071] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic tightening tool, characterized in that: include: Sliding and tightening device (1); A hydraulic device (5) movably connected to the sliding device (1); The sliding and tightening device (1) is driven by the hydraulic device (5) to perform a sliding and tightening operation; Wherein, the sliding and tightening device (1) comprises: A fixed seat (11) movably connected to the hydraulic device (5), and support arms (111) are formed opposite to each other on the fixed seat (11); A transmission mechanism (2), the middle portion of which is hinged to the upper end of the support arm (111); A sliding and tightening mechanism (3) hingedly connected to the upper end of the transmission mechanism (2); A driving rod (12) is movably mounted in a fixing seat (11), the lower end of the driving rod (12) passes through the fixing seat (11) and is movably connected in the hydraulic device (5), and the upper end of the driving rod (12) is in sliding contact with the outer wall of the lower end of the transmission mechanism (2); The transmission mechanism (2) at least comprises: A rotating arm (21), the outer wall of the lower end of which is formed with an arc-shaped guide surface (211); The second rotating arm (22) has an outer wall at the lower end thereof formed with a second arc-shaped guide surface (221); The middle part of the rotating arm 1 (21) and the middle part of the rotating arm 2 (22) are cross-hinged at the upper end of the supporting arm (111), and the arc-shaped guide surface 1 (211) and the arc-shaped guide surface 2 (221) are slidably abutted against the driving rod (12); By driving the rod (12) to move up and down, the ends of the first rotating arm (21) and the second rotating arm (22) are brought closer to each other, thereby driving the sliding and tightening mechanism (3) to perform a sliding and tightening operation.

2. A hydraulic tightening tool according to claim 1, characterized in that: The sliding and tightening mechanism (3) comprises: A sliding arm (31) is hinged to the upper end of the rotating arm (21), and a clamping claw (311) is formed on the upper end of the sliding arm (31); The second sliding arm (32) is hinged to the upper end of the second rotating arm (22), and the upper end of the second sliding arm (32) is formed with a second clamping claw (321); When the ends of the rotating arm 1 (21) and the rotating arm 2 (22) approach each other, the clamping claw 1 (311) and the clamping claw 2 (321) approach each other.

3. A hydraulic tightening tool according to claim 2, characterized in that: A support portion 1 (212) is provided on the rotating arm 1 (21), and a sliding portion 1 (312) is formed at the lower end of the sliding arm 1 (31). The second rotating arm (22) is provided with a second supporting portion (222), and the lower end of the second sliding arm (32) is formed with a second sliding portion (322). When the clamping claw 1 (311) and the clamping claw 2 (321) are brought close to each other for sliding and tightening operation, the support part 1 (212) moves against the inner side wall of the sliding part 2 (322), and the support part 2 (222) moves against the inner side wall of the sliding part 1 (312).

4. A hydraulic tightening tool according to claim 1, characterized in that: A cross arm (121) is formed at the upper end of the driving rod (12), and a sliding member 1 (122) and a sliding member 2 (123) are respectively arranged at both ends of the cross arm (121); the arc-shaped guide surface 1 (211) slidably abuts against the sliding member 1 (122), and the arc-shaped guide surface 2 (221) slidably abuts against the sliding member 2 (123).

5. A hydraulic tightening tool according to claim 4, characterized in that: A limiting member 1 (213) is hingedly connected to the middle of the rotating arm 1 (21), and the limiting member 1 (213) movably abuts against the outer wall of the sliding portion 2 (322) to limit the rotation of the sliding arm 2 (32); A second limiting member (223) is hingedly connected to the middle of the second rotating arm (22), and the second limiting member (223) movably abuts against the outer wall of the first sliding part (312) to limit the rotation of the first sliding arm (31).

6. A hydraulic tightening tool according to claim 5, characterized in that: A protective shell (4) is arranged on the outer side of the fixing seat (11); a shielding member (214) is arranged at the lower end of the first limiting member (213); a shielding member (224) is arranged at the lower end of the second limiting member (223); and the lower ends of the shielding member (214) and the shielding member (224) extend into the protective shell (4).

7. A hydraulic tightening tool according to claim 2, characterized in that: A torsion spring (23) is provided at the hinged joint between the middle of the rotating arm 1 (21) and the middle of the rotating arm 2 (22), and two ends of the torsion spring (23) respectively abut against the sliding arm 1 (31) and the sliding arm 2 (32).

8. A hydraulic tightening tool according to any one of claims 1 to 7, characterized in that: An annular groove (514) is formed on the outer side wall of the upper end of the hydraulic device (5), and a through hole (112) is formed on the side wall of the lower end of the fixed seat (11). A third limiting member (113) is connected to the through hole (112), and the third limiting member (113) is movably disposed in the annular groove (514) to realize the rotation of the sliding device (1) on the hydraulic device (5).

9. A hydraulic tightening tool according to claim 8, characterized in that: The hydraulic device (5) at least comprises: A hydraulic cylinder (51) is movably connected to the lower end of the fixing seat (11), and the hydraulic cylinder (51) has a mounting cavity (511) for the lower end of the driving rod (12) to extend therein, and the outer wall of the upper end of the hydraulic cylinder (51) is provided with the annular groove (514); A piston (52) is sealingly and slidably disposed in the mounting cavity (511) and cooperates with the hydraulic cylinder (51) to form an oil cavity (512), and the oil cavity (512) is provided with an oil inlet hole (513). The piston (52) is movably abutted against the lower end of the driving rod (12); Hydraulic oil enters the oil chamber (512) from the oil inlet hole (513), causing the piston (52) to slide in the mounting chamber (511), thereby pushing the drive rod (12) out of the mounting chamber (511), thereby achieving the sliding and tightening operation of the sliding and tightening device (1).

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