A high-precision universal tightening wrench

Abstract

This utility model discloses a high-precision universal tightening wrench, belonging to the technical field of assembly process technology for fluid transmission and control products in aerospace, land-based equipment, and marine applications. It includes an upper jaw, a lower jaw, a threaded sleeve, a handle, and a fixing pin. The threaded sleeve drives the lower jaw to move, causing the lower jaw to clamp the workpiece against the upper jaw. The fine threads on the handle and threaded sleeve ensure the stability of the jaws. This utility model effectively solves the problem of surface damage to products during the assembly of fluid transmission and control products in aerospace, land-based equipment, and marine applications, thereby reducing production costs, shortening production cycles, and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of assembly process technology for fluid transmission and control products in aerospace, land equipment, and ships, and in particular to a high-precision universal tightening wrench. Background Technology

[0002] In the aerospace, land-based equipment, and shipbuilding industries, product appearance quality control is becoming increasingly stringent. Appearance quality issues caused by assembly tools severely restrict production progress and costs. Surface damage to parts caused by generic wrenches can no longer meet customer quality requirements. Aerospace, land-based equipment, and shipbuilding accessory products often use threaded connections with hexagonal structures on the parts, requiring wrenches for tightening during assembly. However, generic open-end wrenches suffer from poor machining precision, large jaw dimensional tolerances, and low jaw flatness and roughness, resulting in surface damage to parts during tightening. This can even lead to deformation of the hexagonal head, peeling of surface treatment layers, and the absence of anti-corrosion coatings, resulting in rust, burrs causing injuries, and failing to meet the appearance quality requirements of accessory products. This leads to unnecessary resource waste such as replacement and reassembly, impacting product production cycles. Utility Model Content

[0003] The purpose of this utility model is to provide a high-precision universal tightening wrench to solve the problem of conventional wrenches damaging the surface of products during the assembly of accessories in aerospace, land equipment, and ships.

[0004] This utility model provides a high-precision universal tightening wrench, including an upper jaw, a lower jaw, a screw sleeve, a handle, and a fixing pin. The upper jaw is L-shaped and consists of a horizontal fastening section and a vertical high-precision guide rod. Both the fastening section and the high-precision guide rod are straight quadrangular prism structures. The fastening section is parallel to the lower jaw. The lower jaw consists of a second fastening section and a connecting section. The high-precision guide rod passes through a square through hole in the connecting section. The end of the high-precision guide rod and the end face of the handle are axially aligned with a square... The high-precision guide rod has a through hole on its vertical side, and the handle has a through hole in the center of the square slot along the radial direction. Both through holes one and two mate with fixing pins to fix the upper jaws to the handle. The inner side of the threaded sleeve and the outer side of the handle near the square slot are connected by fine threads. Rotating the threaded sleeve controls the jaw size between the first and second fastening sections. The surface roughness of the two fastening sections is 0.8 micrometers. After the jaws are closed, the surfaces of the first and second fastening sections coincide. This design prevents the upper and lower jaws from loosening during assembly, which could cause damage to the product surface. The handle can be replaced with different lengths according to the assembly torque, thereby reducing the assembly difficulty.

[0005] The opposing surfaces of the first and second fastening sections transition smoothly with the end arcs to prevent damage to the workpiece.

[0006] The upper and lower jaws are made of wear-resistant metal.

[0007] The fastening section and the guide rod are integrally formed, with a smooth arc transition at the inner connection.

[0008] The length of the fixing pin is less than the inner diameter of the threaded sleeve and greater than the maximum diameter of the square slot, so as to fix the upper jaw to the handle and prevent it from loosening.

[0009] The lower jaw is moved by the threaded sleeve, pressing the workpiece between the lower and upper jaws. The fine threads on the handle and the threaded sleeve ensure the stability of the jaws. When tightening is required, the lower jaw is moved upward by rotating the threaded sleeve. At this time, the lower jaw slides along the high-precision guide rod of the upper jaw until the lower jaw and the upper jaw are completely in contact with the hexagon of the workpiece. Tighten the threaded sleeve, and then turn the handle to tighten the workpiece.

[0010] The beneficial effects of this utility model are:

[0011] 1) The high-precision universal tightening wrench provided by this utility model can be replaced with handles of different lengths according to the assembly difficulty, which improves the comfort and efficiency during use. It can be applied in various working environments, making disassembly and tightening more convenient and improving work efficiency.

[0012] 2) It can adapt to nuts or bolts of different sizes. The overall structure of the device is simple, easy to adjust, and highly practical.

[0013] 3) It effectively solves the problem of product surface damage during the assembly of fluid transmission and control products in aerospace, land equipment, and ships, thereby reducing enterprise production costs, shortening production cycles, and improving production efficiency. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0015] Figure 1 A schematic diagram of the high-precision universal tightening wrench provided by this utility model;

[0016] Figure 2 A schematic diagram of the structure of the high-precision universal tightening wrench provided by this utility model after removing the threaded sleeve;

[0017] Figure 3 A schematic diagram of the upper jaw structure provided by this utility model;

[0018] Figure 4 A schematic diagram of the lower jaw structure provided by this utility model;

[0019] Figure 5 A partial cross-sectional view of the lower jaws provided by this utility model;

[0020] Figure 6 A perspective view of the lower jaw provided by this utility model;

[0021] Figure 7 A schematic diagram of the structure of the threaded sleeve provided by this utility model;

[0022] Figure 8 A schematic diagram of the handle provided by this utility model;

[0023] Figure 9 A top view of the handle provided by this utility model;

[0024] 1-Upper jaws, 101-Fastening section one, 102-High-precision guide rod, 103-Through hole one,

[0025] 2-Lower jaws, 201-Second fastening section, 202-Connecting section, 203-Square through hole.

[0026] 3-Threaded sleeve,

[0027] 4-Handle, 401-Square slot, 402-Through hole two

[0028] 5-Fixing pin. Detailed Implementation

[0029] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0030] Please see Figure 1-9The figure shows a schematic diagram of the high-precision universal tightening wrench structure provided by this utility model, including an upper jaw 1, a lower jaw 2, a screw sleeve 3, a handle 4, and a fixing pin 5. The upper jaw 1 is L-shaped and consists of a horizontal fastening section 101 and a vertical high-precision guide rod 102. Both the fastening section 101 and the high-precision guide rod 102 are straight quadrangular prism structures. The fastening section 101 is arranged parallel to the lower jaw 2. The lower jaw 2 consists of a second fastening section 201 and a connecting section 202. The high-precision guide rod 102 passes through a square through hole 203 provided in the connecting section 202. The end of the high-precision guide rod 102 is axially aligned with one end face of the handle 4. The high-precision guide rod 102 is fixed with a through hole 103 on its vertical side. The handle 4 is provided with a through hole 402 in the center of the square slot 401 along the radial direction. Both the through hole 103 and the through hole 402 are engaged with the fixing pin 5 to fix the upper jaw 1 on the handle 4. The inner side of the threaded sleeve 3 is connected to the outer side of the handle 4 near the square slot 401 with a fine thread. Rotating the threaded sleeve 3 controls the jaw size between the fastening section 101 and the fastening section 201. The surface roughness of the fastening section 101 and the fastening section 201 is 0.8 micrometers. After the jaws are closed, the surfaces of the fastening section 101 and the fastening section 201 coincide. The opposing surfaces of the first fastening section 101 and the second fastening section 201 transition smoothly with the end arcs. The first fastening section 101 and the high-precision guide rod 102 are integrally formed structures with a smooth arc transition at the inner connection. The upper jaw 1 and the lower jaw 2 are made of smooth, flat, and wear-resistant metal. The length of the fixing pin 5 is less than the inner diameter of the threaded sleeve 3 and greater than the maximum diameter of the square slot 401, so as to fix the upper jaw 1 to the handle 4 and prevent loosening.

[0031] The lower jaw 2 is moved by the threaded sleeve 3, pressing the workpiece between the lower jaw 2 and the upper jaw 1. The fine threads on the handle 4 and the threaded sleeve 3 ensure the stability of the jaws. When tightening the product, the lower jaw 2 is moved upward by rotating the threaded sleeve 3. At this time, the lower jaw 2 slides along the high-precision guide rod 102 of the upper jaw 1 until the second fastening section 201 of the lower jaw 2 and the first fastening section 101 of the upper jaw 1 are completely in contact with the hexagonal part of the part. The threaded sleeve 3 is then tightened, and the handle 4 is turned to tighten the part. To prevent the upper and lower jaws from loosening during assembly and causing damage to the product surface, the handle 4 can be replaced with handles of different lengths according to the assembly torque, thereby reducing the assembly difficulty and the operator's labor intensity.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, are all covered within the scope of the claims of this utility model.

Claims

1. A high-precision universal tightening wrench, characterized in that: The device includes an upper jaw (1), a lower jaw (2), a screw sleeve (3), a handle (4), and a fixing pin (5). The upper jaw (1) is L-shaped and consists of a horizontal fastening section one (101) and a vertical high-precision guide rod (102). Both the fastening section one (101) and the high-precision guide rod (102) are straight quadrangular prism structures. The fastening section one (101) is arranged parallel to the lower jaw (2). The lower jaw (2) consists of a fastening section two (201) and a connecting section (202). The high-precision guide rod (102) passes through a square through hole (203) provided in the connecting section (202). The end of the high-precision guide rod (102) and the end face of the handle (4) are provided with a square slot (401) axially. The high-precision guide rod (102) is provided with a through hole 1 (103) on its vertical side. The handle (4) is provided with a through hole 2 (402) in the center of the square slot (401) along the radial direction. Both the through hole 1 (103) and the through hole 2 (402) are engaged with the fixing pin (5). The inner side of the threaded sleeve (3) is engaged with the outer side of the handle (4) near the square slot (401) with a fine thread connection. Rotating the threaded sleeve (3) controls the jaw size between the fastening section 1 (101) and the fastening section 2 (201). The surface roughness of the fastening section 1 (101) and the fastening section 2 (201) is 0.8 micrometers. After the jaws are closed, the surfaces of the fastening section 1 (101) and the fastening section 2 (201) coincide.

2. The high-precision universal tightening wrench according to claim 1, characterized in that: The opposite surfaces of the first fastening section (101) and the second fastening section (201) transition to the smooth arc at the end, respectively.

3. The high-precision universal tightening wrench according to claim 1, characterized in that: The upper jaw (1) and lower jaw (2) are made of wear-resistant metal.

4. The high-precision universal tightening wrench according to claim 1, characterized in that: The fastening section 1 (101) and the high-precision guide rod (102) are integrally formed structures with a smooth arc transition at the inner connection.

5. The high-precision universal tightening wrench according to claim 1, characterized in that: The length of the fixing pin (5) is less than the inner diameter of the threaded sleeve (3) and greater than the maximum diameter of the square slot (401).

Images