CN219925889U

CN219925889U - Ultrathin hydraulic torque wrench

Info

Publication number: CN219925889U
Application number: CN202321349511.5U
Authority: CN
Inventors: 叶永祥; 瞿彬
Original assignee: Ma'anshan Luotaite Machinery Manufacturing Co ltd
Current assignee: Ma'anshan Luotaite Machinery Manufacturing Co ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-10-31
Anticipated expiration: 2033-05-30

Abstract

The utility model discloses an ultrathin hydraulic torque wrench, and belongs to the technical field of hydraulic wrenches. The utility model comprises an oil cylinder body, wherein the oil cylinder body is connected with a working head assembly and an oil supply assembly, a first piston and a second piston are arranged in the oil cylinder body, and the two pistons are distributed up and down. The first piston is contacted with the upper part of the driving plate through the push head, and the second piston is connected with the driving plate through the hook head. When the working head assembly works, the first piston and the second piston jointly push the driving plate of the working head assembly, and when the working head assembly returns, the second piston independently drives the driving plate. The hydraulic torque wrench adopts a double-cylinder design, so that the driving plate is stressed at double points, the deformation of the driving plate can be effectively prevented, and the whole wrench can be designed in an ultrathin manner; meanwhile, under the condition of providing the same driving force, the cylinder diameter of the oil cylinder can be reduced, and the ultra-thin design of the wrench is also facilitated.

Description

Ultrathin hydraulic torque wrench

Technical Field

The utility model belongs to the technical field of hydraulic wrenches, and particularly relates to an ultrathin hydraulic torque wrench.

Background

The hydraulic spanner is a conventional hydraulic torque spanner suite and is used for applying pretightening torque to the bolting in industry so as to achieve the aim of accurately pretightening the bolts, and meanwhile, the disassembling work of the bolts can be completed. The bolt is widely applicable to bolt connection occasions in the fields of electric power (nuclear power, wind power, water power, thermal power), ships, metallurgy, traffic, cement, construction, aviation and the like.

The hydraulic spanner mainly comprises a hydraulic spanner pump, a working head and a high-pressure oil pipe. The working principle of the hydraulic wrench is as follows: the hydraulic pump firstly generates and outputs power, the power is transmitted to the working head of the hydraulic wrench through the high-pressure oil pipe, and the driven working head is used for screwing or unscrewing the bolt and the nut. The existing hydraulic wrench is designed to be a single oil cylinder, so that a single point of a driving plate is stressed and is easy to deform, and meanwhile, torque loss is caused. In order to prevent the deformation of the driving plate, the driving plate needs to be subjected to certain thickening design, so that the overall thickness of the hydraulic wrench is increased, and the ultrathin design of the hydraulic wrench is not facilitated.

Through searching, the application of Chinese patent application No. 202022681918.0 discloses an ultrathin hollow hydraulic wrench. The application comprises a ratchet wheel meshed with a pawl, the pawl is connected with the middle part of a driving plate through a compression spring, the upper part of the driving plate is connected with an oil cylinder through a piston assembly, and the oil cylinder is connected with an oil circuit assembly.

For another example, chinese patent application No. 202221141191.X discloses a notch ultra-thin hydraulic torque wrench. The application includes: the oil cylinder is internally provided with a piston rod, and the end head of the piston rod is provided with a clamping hook; the cushion block is arranged at the lower right of the oil cylinder; the upper cover and the lower cover are assembled to form a cavity communicated with the inner cavity of the oil cylinder, and the upper cover and the lower cover are fixed below the left part of the oil cylinder after being assembled; the ratchet wheel is partially embedded in the cavity, and a hexagonal transition sleeve is arranged on the inner ring of the ratchet wheel; the upper end of the push wheel ring assembly is clamped on the clamping hook, and the lower end of the push wheel ring assembly is meshed with the ratchet wheel; and one end of the stop block is meshed with the ratchet wheel, and the other end of the stop block is connected with the push wheel ring assembly through a spring.

In the two patent documents, the traditional single-cylinder driving is adopted, and the whole ultrathin design of the hydraulic wrench is also not facilitated.

Disclosure of Invention

1. Problems to be solved

Aiming at least some problems existing in the prior art, the utility model provides an ultrathin hydraulic torque wrench. The torque wrench adopts a double-cylinder design, so that the driving plate is stressed at double points, the deformation of the driving plate can be effectively prevented, and the ultra-thin design of the whole wrench is facilitated.

2. Technical proposal

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the ultrathin hydraulic torque wrench comprises an oil cylinder body, wherein the oil cylinder body is connected with a working head assembly and an oil supply assembly, a first piston and a second piston are arranged in the oil cylinder body, the first piston and the second piston push a driving plate of the working head assembly together, and the two pistons are distributed up and down.

Further, the first piston is located at the upper part of the second piston, wherein the end part of the first piston is in contact with the driving plate, and the end part of the second piston is connected with the driving plate.

Further, the first piston is contacted with the upper part of the driving plate through the push head, and the second piston is connected with the driving plate through the hook head.

Further, the working head assembly comprises two outer baffles which are respectively positioned at two sides of the oil cylinder body, and a groove for clamping in a first connecting plate on the oil cylinder body is arranged on the outer baffles.

Further, a second connecting plate is further arranged on the oil cylinder body, and the second connecting plate extends between the two outer baffle plates.

Further, a cushion block is further arranged between the two second connecting plates, and an outer guard plate is arranged at the end part of the second connecting plate, which is far away from the oil cylinder body.

Further, a mounting through hole is formed in the driving plate, a ratchet wheel and a pawl which are matched with each other are arranged in the mounting through hole, and the pawl is further connected with a spring.

Further, a reaction arm is arranged at the bottom of the oil cylinder body, and the reaction arm is arranged between the two outer baffle plates through a fixed shaft.

Further, the oil supply assembly comprises a rotary joint and a quick joint, wherein the quick joint is arranged at the top of the oil cylinder body through the rotary joint.

3. Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) According to the ultrathin hydraulic torque wrench, the first piston and the second piston are arranged in the oil cylinder body, wherein the first piston and the second piston jointly push the driving plate of the working head assembly, and the two pistons are distributed up and down; compared with the traditional single-cylinder design, the wrench provided by the utility model adopts a double-cylinder design, so that the driving plate is stressed at double points, the deformation of the driving plate can be effectively prevented, and the whole wrench can be designed in an ultrathin manner; meanwhile, under the condition of providing the same driving force, the cylinder diameter of the oil cylinder can be reduced, and the ultra-thin design of the wrench is also facilitated.

(2) According to the ultrathin hydraulic torque wrench, the end part of the first piston is contacted with the driving plate, and the end part of the second piston is connected with the driving plate; when the screw bolt works, as a certain amount of thrust is needed, the first piston and the second piston exert thrust on the driving plate together so as to meet the force required by fastening or detaching the screw bolt; while a single piston can meet the demand when the drive plate is returned, since only a very small force is required.

(3) According to the ultrathin hydraulic torque wrench, the groove is formed in the outer baffle, the first connecting plate on the oil cylinder body is matched with the groove, so that the oil cylinder body and the outer baffle are tightly combined, and relative displacement is not easy to occur between the oil cylinder body and the outer baffle during working; meanwhile, the clamping mode enables the disassembly and assembly operation between the two to be more convenient and quicker.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an ultra-thin hydraulic torque wrench of the present utility model;

FIG. 2 is a cross-sectional view of an ultra-thin hydraulic torque wrench of the present utility model;

FIG. 3 is a schematic view of the structure of the cylinder body according to the present utility model;

FIG. 4 is a schematic view of the structure of the outer baffle plate of the present utility model;

fig. 5 is a schematic structural view of a driving plate in the present utility model.

In the figure: 1. an oil cylinder body; 11. a first piston; 12. a second piston; 13. pushing heads; 14. a hook head; 15. a first connection plate; 16. a second connecting plate;

2. a working head assembly; 21. a driving plate; 211. a mounting groove; 212. mounting through holes; 22. an outer baffle; 221. a groove; 23. a cushion block; 24. an outer guard plate; 25. a ratchet wheel; 26. a pawl; 27. a spring; 28. a reaction arm; 29. a fixed shaft;

3. an oil supply assembly; 31. a rotary joint; 32. a quick connector.

Detailed Description

The utility model is further described below in connection with specific embodiments.

As shown in fig. 1, an ultra-thin hydraulic torque wrench of this embodiment includes an oil cylinder body 1, wherein the oil cylinder body 1 is connected with a working head assembly 2 and an oil supply assembly 3. Wherein, a first piston 11 and a second piston 12 are arranged in the oil cylinder body 1; the first piston 11 and the second piston 12 are distributed up and down, and the two pistons jointly push the driving plate 21 of the working head assembly 2.

The ultrathin hydraulic torque wrench of the embodiment adopts a double-cylinder design; compared with the traditional single-cylinder design, the driving plate 21 is stressed at two points, so that the stressed deformation of the driving plate 21 can be effectively prevented; meanwhile, on the premise that the driving plate 21 is not deformed under the force, the thickness of the driving plate 21 can be reduced, so that the whole wrench can be designed in an ultrathin manner. In addition, under the condition of providing the same driving force, the cylinder diameter of a single oil cylinder can be reduced, and the ultra-thin design of the wrench is also facilitated.

Referring to fig. 2, the first piston 11 is located at the upper portion of the second piston 12. Wherein the end of the first piston 11 is in contact with the driving plate 21, and the end of the second piston 12 is connected with the driving plate 21. That is, there is no direct connection between the first piston 11 and the drive plate 21. In operation, the first piston 11 and the second piston 12 jointly push the drive plate 21; and during the return stroke, only the second piston 12 drives the driving plate 21 to return stroke.

Specifically, the first piston 11 contacts with the upper portion of the driving plate 21 through the push head 13, and the second piston 12 is connected with the driving plate 21 through the hook head 14.

Referring to fig. 5, the driving plate 21 is provided with a mounting groove 211 and a mounting through hole 212. The hook 14 at the end of the second piston 12 extends into the mounting groove 211, and then the connection between the two is completed through the pin shaft.

The installation through hole 212 is internally provided with a ratchet wheel 25 and a pawl 26 which are matched with each other, and the pawl 26 is also connected with a spring 27. One end of the spring 27 is positioned in the mounting hole of the pawl 26, and the other end is connected to the inner wall of the mounting through hole 212.

Referring to fig. 1 and 4, the working head assembly 2 includes two outer baffles 22 respectively located at two sides of the cylinder body 1, and grooves 221 are formed in the outer baffles 22. Meanwhile, the outer baffle 22 is provided with a mounting hole for mounting the ratchet wheel 25, and both end portions of the ratchet wheel 25 can be mounted in the mounting hole through bushings.

A cushion block 23 is further arranged between the two second connecting plates 16, and an outer guard plate 24 is arranged at the end part of the second connecting plate 16 far away from the oil cylinder body 1. In addition, as shown in fig. 2, a reaction arm 28 is provided at the bottom of the cylinder body 1, and the reaction arm 28 is disposed between the two outer baffles 22 through a fixing shaft 29.

As shown in fig. 3, the cylinder body 1 is provided with a first connecting plate 15 and a second connecting plate 16. The first connecting plates 15 are located at two sides of the end surface of the cylinder body 1, and are arc-shaped and fit with the grooves 221 on the outer baffle 22. The cylinder body 1 is clamped with the outer baffle 22 through the first connecting plate 15 and the groove 221. The second connecting plate 16 is located at the upper part of the end face of the cylinder body 1, and the second connecting plate 16 extends between two outer baffles 22. Meanwhile, a lug is arranged at the bottom of the oil cylinder body 1, and the two outer baffles 22 are connected with the lug through shaft pins. The design of the clamping and shaft pin ensures the stability of the connection between the oil cylinder body 1 and the outer baffle 22 and prevents the relative displacement between the oil cylinder body 1 and the outer baffle 22 during working; meanwhile, the disassembly and assembly operations between the two are more convenient and quicker.

The oil supply assembly 3 comprises a rotary joint 31 and a quick joint 32, wherein the quick joint 32 is arranged at the top of the oil cylinder body 1 through the rotary joint 31.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. The utility model provides an ultra-thin hydraulic torque wrench, includes hydro-cylinder body (1), hydro-cylinder body (1) be connected with working head subassembly (2) and oil feeding subassembly (3), its characterized in that: the oil cylinder is characterized in that a first piston (11) and a second piston (12) are arranged in the oil cylinder body (1), wherein the first piston (11) and the second piston (12) jointly push a driving plate (21) of the working head assembly (2), and the two pistons are distributed up and down.

2. An ultra-thin hydraulic torque wrench as claimed in claim 1, wherein: the first piston (11) is arranged at the upper part of the second piston (12), wherein the end part of the first piston (11) is contacted with the driving plate (21), and the end part of the second piston (12) is connected with the driving plate (21).

3. An ultra-thin hydraulic torque wrench as claimed in claim 2, wherein: the first piston (11) is contacted with the upper part of the driving plate (21) through the push head (13), and the second piston (12) is connected with the driving plate (21) through the hook head (14).

4. An ultra-thin hydraulic torque wrench as claimed in any one of claims 1-3, wherein: the working head assembly (2) comprises two outer baffle plates (22) which are respectively positioned at two sides of the oil cylinder body (1), and a groove (221) for clamping in a first connecting plate (15) on the oil cylinder body (1) is arranged on the outer baffle plates (22).

5. An ultra-thin hydraulic torque wrench as claimed in claim 4, wherein: the oil cylinder body (1) is also provided with a second connecting plate (16), and the second connecting plate (16) extends between the two outer baffle plates (22).

6. An ultra-thin hydraulic torque wrench as claimed in claim 5, wherein: a cushion block (23) is further arranged between the two second connecting plates (16), and an outer guard plate (24) is arranged at the end part of the second connecting plate (16) far away from the oil cylinder body (1).

7. An ultra-thin hydraulic torque wrench as claimed in claim 6, wherein: the driving plate (21) is provided with a mounting through hole (212), a ratchet wheel (25) and a pawl (26) which are matched with each other are arranged in the mounting through hole (212), and the pawl (26) is also connected with a spring (27).

8. An ultra-thin hydraulic torque wrench as claimed in claim 7, wherein: the bottom of the oil cylinder body (1) is provided with a counter force arm (28), and the counter force arm (28) is arranged between the two outer baffle plates (22) through a fixed shaft (29).

9. An ultra-thin hydraulic torque wrench as claimed in claim 8, wherein: the oil supply assembly (3) comprises a rotary joint (31) and a quick joint (32), wherein the quick joint (32) is arranged at the top of the oil cylinder body (1) through the rotary joint (31).