Manual tool suitable for double-end stud installation and use method of manual tool

Abstract

The manual tool suitable for mounting the double-end stud and the using method of the manual tool are characterized in that the manual tool comprises an inner nut (1), an outer nut (2), a locking screw (3) and an ejector rod (4); an inner nut outer hexagon (13) is arranged at the upper end of the outer portion of the inner nut (1), the two symmetrical planes of the outer wall of the inner nut outer hexagon (13) are each provided with a limiting blind hole (12), a first inner threaded hole (11) is formed in the inner nut outer hexagon (13), the first inner threaded hole (11) is formed in the axial direction of the inner nut (1), the first inner threaded hole (11) is matched with a to-be-installed double-end stud, and the first inner threaded hole (11) is matched with the to-be-installed double-end stud. According to the invention, the installation efficiency is high, and the problem of thread damage is completely avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of hand tools, and in particular to a hand tool suitable for installing studs and a use method thereof. Background Art

[0002] The docking structure is a common form in missile structural design. A large number of studs are used to connect the docking compartments. The reliability of the stud installation directly affects the reliability of the docking structure. The quality requirements for missile assembly are high, and the assembly process should be controllable. In order to ensure the reliable tightening of the studs, two nuts are generally installed at one end of the studs and locked together. This method has low installation efficiency and there is a risk of damaging the stud threads.

[0003] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0004] The invention provides a hand tool suitable for installing a stud and a use method thereof, aiming to solve the problems of low installation efficiency and easy thread damage of the stud in the prior art.

[0005] A hand tool suitable for installing a stud, characterized in that it comprises an inner nut 1, an outer nut 2, a locking screw 3 and a push rod 4; an inner nut outer hexagon 13 is provided at the upper end of the outer part of the inner nut 1, and two symmetrical planes on the outer wall of the inner nut outer hexagon 13 are each provided with a limiting blind hole 12, and a first internal threaded hole 11 is provided in the inner nut outer hexagon 13, and the first internal threaded hole 11 is arranged along the axial direction of the inner nut 1, and the first internal threaded hole 11 cooperates with the stud to be installed, and the thread length of the first internal threaded hole 11 is less than the thread length of the stud; an outer nut inner hexagon 21 is provided at one end of the outer nut 2 that cooperates with the inner nut 1, and a third internal threaded hole 22 is each provided with a group of two symmetrical planes on the inner wall of the outer nut inner hexagon 21, and the third internal threaded hole 22 cooperates with the locking screw 3;

[0006] A second internal threaded hole 23 is provided at one end of the outer nut 2 that cooperates with the push rod 4, and the second internal threaded hole 23 is a reverse full thread; the thread length of the second internal threaded hole 23 is less than the thread length of the push rod 4; the diameter of the second internal threaded hole 23 is greater than the diameter of the first internal threaded hole 11; the outer side of the second internal threaded hole 23 is an outer hexagonal hole 24 of the outer nut; the locking screw 3 is a screw head, a locking screw thread 32 and a smooth rod 31 from top to bottom; the locking screw 3 is screwed into and passes through the third internal thread 22 of the outer nut, and its smooth rod 31 is embedded in the limiting blind hole (12) of the inner nut, and the locking screw thread 32 cooperates with the third internal thread 22 of the outer nut; the push rod 4 is provided with a push rod reverse external thread 41 at one end that cooperates with the outer nut 2, and the other end of the push rod 4 is provided with a push rod external hexagonal hole 42.

[0007] The inner nut 1 is machined from 42CrMo material.

[0008] The outer nut 2 is machined from 42CrMo material.

[0009] The locking screw 3 is processed and modified using a standard GB5783-2000 M5×7 screw.

[0010] The push rod 4 is made of 42CrMo material.

[0011] The hand tool is characterized in that the inner nut outer hexagon 13 of the inner nut 1 is installed in cooperation with the outer nut inner hexagon 21 of the outer nut 2 to limit the axial relative displacement of the inner nut 1 and the outer nut 2, and the smooth rod 31 of the two locking screws 3 is inserted into the limiting blind hole 12 to limit the radial relative displacement of the inner nut 1 and the outer nut 2.

[0012] A method for using a hand tool suitable for installing a small-sized stud bolt, characterized in that the hand tool is used, and the following steps are included:

[0013] Step 1: butt-jointly assemble the outer hexagonal 13 of the inner nut 1 and the inner hexagonal 21 of the outer nut 2, so that the axes of the limiting blind hole 12 and the third inner thread 22 coincide with each other;

[0014] Step 2: Screw the two locking screws 3 into the third internal thread 22 until the polished rod 31 is inserted into the limiting blind hole 12 and tightened;

[0015] Step 3: Screw the push rod reverse external thread 41 of the push rod 4 into the second internal thread hole 23 of the external nut 2 until it is tightened;

[0016] Step 4: Screw one end of the stud into the first internal threaded hole 11 of the internal nut 1 until it is tightened;

[0017] Step 5: Use a socket or a wrench tool to clamp the outer nut 2 at the outer hexagonal 24 of the outer nut, and rotate it in the forward direction until the stud is tightened;

[0018] Step 6: Use a socket or a wrench tool to clamp the outer hexagonal 42 of the push rod 4, and rotate it forward to unscrew the push rod 4. The end of the push rod 4 provided with the reverse external thread 41 is separated from the contact surface with the stud, and the bite force is lost;

[0019] Step 7: Manually rotate the outer nut 2 in the opposite direction until the first internal threaded hole 11 is successfully separated from the thread of the stud.

[0020] Beneficial effects:

[0021] The present invention utilizes the method of mutually locking the end faces of the top screw and the stud to tightly connect one end of the stud with the hand tool itself into a whole, and then installs the other end of the stud in a cabin end face in the docking structure. When the tooling is tightened, first loosen the push rod, which is connected to the outer nut by a reverse thread. The push rod can be loosened by forward rotation. The forward rotation will not affect the tightening state of the stud, but will increase the tightening force of the stud. After the push rod is loosened, the bite locking state between the stud and the push rod disappears, and then reversely loosen the outer nut to separate the hand tool from the stud. Compared with the double nut installation method in the prior art, the present invention has high installation efficiency, completely avoids the problem of thread damage, and has outstanding substantial characteristics and significant progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , is a schematic diagram of the structure of an embodiment of the present invention;

[0023] Figure 2 , is a cross-sectional view through the central axis of the present invention;

[0024] Figure 3 , is a schematic diagram of the structure of the inner nut of the present invention;

[0025] Figure 4 , is a schematic diagram of the structure of the outer nut of the present invention;

[0026] Figure 5 , is a schematic diagram of the locking screw structure of the present invention;

[0027] Figure 6 , is a schematic diagram of the top rod structure of the present invention.

[0028] Among them, 1 is an inner nut; 2 is an outer nut; 3 is a locking screw; 4 is a push rod; 11 is a first inner threaded hole; 12 is a limiting blind hole; 13 is an outer hexagonal hole of the inner nut; 21 is an inner hexagonal hole of the outer nut; 22 is a third inner threaded hole; 23 is a second inner threaded hole; 24 is an outer hexagonal hole of the outer nut; 31 is a smooth rod; 32 is a locking screw thread; 41 is a reverse outer thread of the push rod; 42 is an outer hexagonal hole of the push rod. DETAILED DESCRIPTION

[0029] A hand tool suitable for installing a stud, characterized in that it comprises an inner nut 1, an outer nut 2, a locking screw 3 and a push rod 4; an inner nut outer hexagon 13 is provided at the upper end of the outer part of the inner nut 1, and two symmetrical planes on the outer wall of the inner nut outer hexagon 13 are each provided with a limiting blind hole 12, and a first internal threaded hole 11 is provided in the inner nut outer hexagon 13, and the first internal threaded hole 11 is arranged along the axial direction of the inner nut 1, and the first internal threaded hole 11 cooperates with the stud to be installed, and the thread length of the first internal threaded hole 11 is less than the thread length of the stud; an outer nut inner hexagon 21 is provided at one end of the outer nut 2 that cooperates with the inner nut 1, and a third internal threaded hole 22 is each provided with a group of two symmetrical planes on the inner wall of the outer nut inner hexagon 21, and the third internal threaded hole 22 cooperates with the locking screw 3;

[0030] A second internal threaded hole 23 is provided at one end of the outer nut 2 that cooperates with the push rod 4, and the second internal threaded hole 23 is a reverse full thread; the thread length of the second internal threaded hole 23 is less than the thread length of the push rod 4; the diameter of the second internal threaded hole 23 is greater than the diameter of the first internal threaded hole 11; the outer side of the second internal threaded hole 23 is an outer hexagonal hole 24 of the outer nut; the locking screw 3 is a screw head, a locking screw thread 32 and a smooth rod 31 from top to bottom; the locking screw 3 is screwed into and passes through the third internal thread 22 of the outer nut, and its smooth rod 31 is embedded in the limiting blind hole (12) of the inner nut, and the locking screw thread 32 cooperates with the third internal thread 22 of the outer nut; the push rod 4 is provided with a push rod reverse external thread 41 at one end that cooperates with the outer nut 2, and the other end of the push rod 4 is provided with a push rod external hexagonal hole 42.

[0031] The inner nut 1 is machined from 42CrMo material.

[0032] The outer nut 2 is machined from 42CrMo material.

[0033] The locking screw 3 is processed and modified using a standard GB5783-2000 M5×7 screw.

[0034] The push rod 4 is made of 42CrMo material.

[0035] The inner nut outer hexagon 13 of the inner nut 1 is installed in cooperation with the outer nut inner hexagon 21 of the outer nut 2 to limit the axial relative displacement of the inner nut 1 and the outer nut 2. The light rods 31 of the two locking screws 3 are clamped in the limiting blind holes 12 to limit the radial relative displacement of the inner nut 1 and the outer nut 2.

[0036] A method for using a hand tool suitable for installing a small-sized stud, characterized in that the tool of the present invention is used, comprising the following steps:

[0037] Step 1: butt-jointly assemble the outer hexagonal 13 of the inner nut 1 and the inner hexagonal 21 of the outer nut 2, so that the axes of the limiting blind hole 12 and the third inner thread 22 coincide with each other;

[0038] Step 2: Screw the two locking screws 3 into the third internal thread 22 until the polished rod 31 is inserted into the limiting blind hole 12 and tightened;

[0039] Step 3: Screw the push rod reverse external thread 41 of the push rod 4 into the second internal thread hole 23 of the external nut 2 until it is tightened;

[0040] Step 4: Screw one end of the stud into the first internal threaded hole 11 of the internal nut 1 until it is tightened;

[0041] Step 5: Use a socket or a wrench tool to clamp the outer nut 2 at the outer hexagonal 24 of the outer nut, and rotate it in the forward direction until the stud is tightened;

[0042] Step 6: Use a socket or a wrench tool to clamp the outer hexagonal 42 of the push rod 4, and rotate it forward to unscrew the push rod 4. The end of the push rod 4 provided with the reverse external thread 41 is separated from the contact surface with the stud, and the bite force is lost;

[0043] Step 7: Manually rotate the outer nut 2 in the opposite direction until the first internal threaded hole 11 is successfully separated from the thread of the stud.

[0044] A hand tool suitable for installing a stud, comprising an inner nut, an outer nut, a locking screw and a push rod; the inner nut is used to install a first inner threaded hole at one end of the stud, and an outer hexagon is arranged on the outside, and a limiting hole is arranged on the outer hexagon, the first inner threaded hole is arranged along the axial direction of the inner nut, the thread specification is consistent with that of the stud, the thread length is less than the thread length of the stud, and there are two limiting holes, which are arranged at two opposite positions of the outer hexagon; the outer nut is matched with the inner nut at one end and is provided with an inner hexagon, and two third inner threads are arranged at two opposite positions of the inner hexagon for connecting the locking screw, and the end connected to the push rod is provided with a reverse second inner thread, the thread diameter is greater than the diameter of the stud, and the outer side is an outer hexagon, which is a tool clamping surface; the third inner thread specification of the locking screw is consistent with that of the outer nut, and a polished rod is arranged at the top, the diameter of which is smaller than the limiting hole of the inner nut, and can be inserted into the limiting hole; the push rod is matched with the outer nut at one end and is provided with a reverse outer thread, and the other end is provided with an outer hexagon, which is a tool clamping surface.

[0045] Furthermore, the inner nut is machined from 42CrMo material.

[0046] Furthermore, the outer nut is machined from 42CrMo material.

[0047] Furthermore, the locking screw is processed and modified using a standard GB5783-2000 M5×7 screw.

[0048] Furthermore, the external thread of the push rod and the second internal thread of the external nut are both reverse full threads.

[0049] Furthermore, the inner nut and the outer nut are connected via a hexagonal connection.

[0050] Furthermore, the locking screw and the outer nut are connected via threads.

[0051] Furthermore, the push rod is connected to the outer nut via a reverse thread.

[0052] Furthermore, the outer nut clamping surface is in an outer hexagonal shape.

[0053] Furthermore, the clamping surface of the ejector pin is in an outer hexagonal shape.

[0054] Based on the same concept, the present invention also proposes a method for using a hand tool suitable for installing a stud, using the hand tool, comprising the following steps:

[0055] Assemble the outer hexagon of the inner nut with the inner hexagon of the outer nut, and make sure that the limit hole and the third inner thread overlap;

[0056] Screw the two locking screws into the third internal thread until the polished rod is locked into the limiting hole and tightened;

[0057] Screw the reverse external thread of the push rod 4 into the second internal thread of the external nut until it is tightened;

[0058] Screw one end of the stud into the first internal threaded hole of the internal nut until it is tightened;

[0059] Use a socket or wrench to tighten the outer hexagon of the outer nut and rotate it in the forward direction until the stud is tightened;

[0060] Use a socket or wrench to clamp the outer hexagon of the ejector rod, and rotate it forward to unscrew the ejector rod. The end of the ejector rod with the reverse external thread is separated from the contact surface with the stud, and the bite force is lost.

[0061] Manually rotate the outer nut in the opposite direction until the first internal thread hole is smoothly separated from the threads of the stud.

[0062] The beneficial technical effects achieved by the present invention are:

[0063] By using the method of mutual locking of the end faces of the top screw and the stud, one end of the stud is tightly connected to the hand tool itself into a whole, and then the other end of the stud is installed in a cabin end face in the docking structure. When the tooling is tightened, the push rod is first loosened. The push rod and the outer nut are reversely threaded. The push rod can be loosened by forward rotation. The forward rotation will not affect the tightening state of the stud, but will increase the tightening force of the stud. After the push rod is loosened, the bite locking state between the stud and the push rod disappears, and the outer nut is loosened in the reverse direction to separate the hand tool from the stud. Compared with the double nut installation method in the prior art, the installation efficiency is high, the problem of thread damage is completely avoided, and it has outstanding substantial characteristics and significant progress.

[0064] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. The specific details such as specific system structure, model, technical parameters, etc. proposed in the following description are only for better understanding of the present implementation, rather than limitation, and should not affect the scope of protection of the present invention. In addition, the contents that should be known and understood by those skilled in the art will not be repeated here.

[0065] like Figures 1 to 6 As shown, an embodiment of a hand tool suitable for installing a stud bolt is used for installing a stud bolt in a missile docking assembly structure, and includes an inner nut 1, an outer nut 2, a locking screw 3 and a push rod 4.

[0066] The inner nut 1 is cylindrical in shape and is machined from 42CrMo material. The material used should be determined according to the stud to be disassembled and assembled, and is related to the specifications and material of the stud. It should meet the installation requirements and not damage the threads of the stud. The specification of the stud to be installed in this specific embodiment is M10×25, 12.9 grade, and the thread lengths at both ends are 16mm and 16.25mm respectively.

[0067] A first internal threaded hole 11 , a limiting hole 12 and an external hexagonal hole 13 are arranged inside one end of the internal nut 1 .

[0068] The thread specification of the first internal threaded hole 11 is consistent with that of the stud, and the thread length is 8 mm, which is smaller than the thread length of the short side of the stud. The specific value can be adaptively adjusted according to actual needs.

[0069] An external hexagonal block 13 is arranged on the outside of the first internal threaded hole 11. The distance between opposite sides of the external hexagonal block is 16 mm and the height is 8 mm. The external hexagonal block 13 has two functions. One is to realize radial positioning between the internal nut 1 and the external nut 2. The other is that when the internal nut 1 is used alone, the external hexagonal block 13 can be used as a tool clamping surface.

[0070] The two symmetric surfaces of the outer hexagon 13 are provided with limit holes 12, the limit holes are 4 mm in diameter and 2 mm in depth, and are blind holes. There are two limit holes 12, and the top polished rod 31 of the locking screw 3 can be embedded in the limit holes 12 to achieve axial positioning between the inner nut 1 and the outer nut 2.

[0071] The outer nut 2 is cylindrical as a whole and is machined from 42CrMo material, preferably the same material as the inner nut 1. One end of the outer nut 2 is provided with an inner hexagon 21 and a third inner thread 22, and the other end is provided with an inner hexagon 21 and a third inner thread 22.

[0072] The distance between opposite sides of the inner hexagon 21 is 16.2mm, and the depth is 8.5mm. When matched with the inner nut 1, corresponding margins are set in all directions. When installed, the position of the third inner thread 22 is in the same direction as the position of the limiting hole 12 of the inner nut 1.

[0073] The third internal threads 22 are arranged on two symmetrical surfaces of the internal hexagon 21 . The third internal threads 22 are M5 standard threaded through holes. The locking screw 3 is installed on the third internal threads 22 .

[0074] The second internal thread 23 is a reverse standard thread of M12, a through-hole thread, and has a thread length of 11.5 mm.

[0075] The outer side of the second internal thread 23 is an external hexagonal 24 with a distance of 16 mm across the sides and a height of 8 mm, which is a tool clamping surface when installing the stud.

[0076] The locking screw 3 is processed and modified using the standard GB5783-2000 M5×7 screw. The end polished rod 31 is 2 mm long and 3.9 mm in diameter. The locking screw 3 is installed at the third internal thread 22 of the external nut. The polished rod 31 is embedded in the limiting hole 12 of the internal nut 1. When using a tool to clamp the external hexagonal stud 24 of the external nut 2 and tighten the stud, it plays a role in limiting the relative movement of the internal nut 1 and the external nut 2 in the axial direction.

[0077] The push rod 4 is cylindrical as a whole and is machined from 42CrMo material, preferably the same material as the inner nut 1, with a total length of 18 mm.

[0078] A reverse external thread 41 is provided at one end of the push rod 4 that cooperates with the external nut 2. The reverse external thread 41 is a reverse standard thread of M12 with a thread length of 13mm. The push rod 4 and the external nut 2 are designed as reverse threads. When the stud is installed and the hand tool is removed, the push rod 4 is first loosened to separate the contact surface between the push rod 4 and the stud. The reverse thread loosening direction is positive, i.e., clockwise. During the loosening process, there is a bite force because the push rod 4 is in close contact with the contact surface of the stud. Since the loosening direction is positive, it will not affect the tightening force of the stud, but will continue to increase the tightening force of the stud. When the push rod 4 is separated from the contact surface of the stud, the bite force is lost, and the thread cooperation between the inner nut 1 and the stud can be easily loosened.

[0079] The other end of the push rod 4 is provided with an outer hexagonal 42, the opposite side distance of the outer hexagonal 42 is 8mm, and the height is 5mm, which is the tool clamping surface when loosening the push rod 4.

[0080] Based on the same technical concept, the present invention also provides a method for using the above-mentioned manual tool. Taking the installation of studs in a missile docking assembly structure as an example, it is also applicable to the installation of studs in other structures without any substantial difference.

[0081] A method for using a hand tool suitable for installing a stud is performed in the following steps:

[0082] Assemble the outer hexagonal 13 of the inner nut 1 with the inner hexagonal 21 of the outer nut 2, and make sure that the limiting hole 12 and the third inner thread 22 overlap;

[0083] Screw the two locking screws 3 into the third internal thread 22 until the polished rod 31 is inserted into the limiting hole 12 and tightened. The locking screws 3 are mainly used to realize the axial positioning between the inner nut 1 and the outer nut 2 to prevent the relative displacement of the inner nut 1 and the outer nut 2 when tightening the outer hexagon 24 of the outer nut 2 with a tool such as a socket or a wrench;

[0084] Screw the reverse external thread 41 of the push rod 4 into the second internal thread 23 of the external nut 2 until it is tightened, at which point the lower surface of the push rod 4 fits with the upper surface of the internal nut 1;

[0085] Screw one end of the stud into the first internal threaded hole 11 of the internal nut 1 until it is tightened. At this time, the upper surface of the stud fits with the lower surface of the push rod 4 and is fully engaged;

[0086] Use a socket or wrench to tighten the outer hexagon 24 of the outer nut 2 and rotate it in the forward direction until the stud is tightened;

[0087] Use a tool such as a socket or a wrench to clamp the outer hexagonal 42 of the push rod 4, and rotate it forward to unscrew the push rod 4. The end of the push rod 4 provided with the reverse external thread 41 is separated from the contact surface with the stud, and the bite force is lost. The reverse thread is loosened in the positive direction, that is, clockwise. During the loosening process, the push rod 4 is in close contact with the contact surface of the stud, and there is a bite force. Because the loosening direction is positive, it will not affect the fastening force of the stud, but will continue to increase the fastening force of the stud.

[0088] The internal nut 1 is manually rotated in the reverse direction until the first internal threaded hole 11 is successfully separated from the thread of the stud.

[0089] At this point, the rapid and reliable tightening of the studs in the missile docking assembly structure is achieved.

[0090] The beneficial technical effects achieved by this specific embodiment are:

[0091] By using the method of mutual locking of the end faces of the top screw and the stud, one end of the stud is tightly connected to the hand tool itself into a whole, and then the other end of the stud is installed in a cabin end face in the docking structure. When the tooling is tightened, the push rod is first loosened. The push rod and the outer nut are reversely threaded. The push rod can be loosened by forward rotation. The forward rotation will not affect the tightening state of the stud, but will increase the tightening force of the stud. After the push rod is loosened, the bite locking state between the stud and the push rod disappears, and the outer nut is loosened in the reverse direction to separate the hand tool from the stud. Compared with the double nut installation method in the prior art, the installation efficiency is high, the problem of thread damage is completely avoided, and it has outstanding substantial characteristics and significant progress.

[0092] The present invention provides a hand tool suitable for installing a stud, which belongs to the technical field of hand tools, and comprises an inner nut, an outer nut, a locking screw and a push rod; the inner nut is used for installing a first inner threaded hole at one end of the stud, and a limiting hole is arranged at the outer hexagon; the first inner threaded hole is arranged along the axial direction, the thread specification is consistent with that of the stud, and the thread length is less than the thread length of one side of the stud; the number of limiting holes is 2, which are arranged radially and symmetrically distributed at the outer hexagon; a second inner thread is arranged at one end of the outer nut cooperating with the push rod, the outer side is an outer hexagon, and an inner hexagon is arranged at one end of the outer nut cooperating with the inner nut, and two third inner threads are arranged at the inner hexagon; the second inner thread is arranged along the axial direction, the thread specification is consistent with that of the push rod thread, and the thread length is less than that of the push rod thread; the number of the third inner thread is 2, which are arranged radially and symmetrically distributed at the inner hexagon, and the thread specification is consistent with that of the locking screw; the number of locking screws is 2, which are assembled at the third inner thread of the outer nut, and the screw head is embedded in the limiting hole of the inner nut; an outer thread is arranged at one end of the push rod cooperating with the outer nut, and an outer hexagon is arranged at the other end. The invention also provides a use method, which solves the problems of low installation efficiency and easy thread damage of small-sized stud bolts in the prior art.

[0093] A hand tool suitable for installing a stud, characterized in that it comprises an inner nut 1, an outer nut 2, a locking screw 3 and a push rod 4; an outer end of the inner nut 1 is provided with an outer hexagon 13, and two symmetrical planes of the outer hexagon are provided with limiting holes 12, and one end for installing the stud is provided with a first inner threaded hole 11, and the first inner threaded hole 11 is arranged along the axial direction of the inner nut 1, and the thread specification is consistent with the stud, and the thread length is less than the thread length of the stud; an end of the outer nut 2 that cooperates with the inner nut 1 is provided with an inner hexagon 21, and two symmetrical planes of the inner hexagon 21 are provided with two third inner threads 22, and the third inner thread The specifications of the thread 22 are consistent with those of the locking screw 3. A second internal thread 23 is provided at one end of the external nut 2 that cooperates with the push rod 4. The second internal thread 23 is a reverse full thread, which is consistent with the thread specifications of the push rod 4. The thread length is smaller than the push rod thread. The diameter of the second internal thread 23 is larger than the diameter of the first internal thread hole 11, and the outer side of the second internal thread 23 is an external hexagonal 24; a smooth rod 31 is provided at the head of the locking screw 3, and the smooth rod 31 is embedded in the internal nut limiting hole, and the locking screw thread 32 cooperates with the third internal thread 22 of the external nut; a reverse external thread 41 is provided at one end of the push rod 4 that cooperates with the external nut 2, and an external hexagonal 42 is provided at the other end.

[0094] The inner nut 1 is machined from 42CrMo material.

[0095] The outer nut 2 is machined from 42CrMo material.

[0096] The locking screw 3 is processed and modified using a standard GB5783-2000 M5×7 screw.

[0097] The push rod 4 is made of 42CrMo material.

[0098] The second internal thread 23 is a reverse full thread, which has the same specification as the reverse external thread 41 , and the two are connected by a reverse thread.

[0099] The hand tool suitable for installing studs is used, which includes the following steps: the outer hexagon 13 of the inner nut 1 is matched with the inner hexagon 21 of the outer nut 2 to limit the axial relative displacement of the inner nut 1 and the outer nut 2, and the light rod 31 of the two locking screws 3 is inserted into the limit hole 12 to limit the radial relative displacement of the inner nut 1 and the outer nut 2.

[0100] A method for using a hand tool suitable for installing a small-sized stud bolt, characterized in that the hand tool is used, and the following steps are included:

[0101] Assemble the outer hexagonal 13 of the inner nut 1 with the inner hexagonal 21 of the outer nut 2, and make sure that the limiting hole 12 and the third inner thread 22 overlap;

[0102] Screw the two locking screws 3 into the third internal thread 22 until the polished rod 31 is inserted into the limiting hole 12 and tightened;

[0103] Screw the reverse external thread 41 of the push rod 4 into the second internal thread 23 of the external nut 2 until it is tightened;

[0104] Screw one end of the stud into the first internal threaded hole 11 of the internal nut 1 until it is tightened;

[0105] Use a socket or wrench to tighten the outer hexagon 24 of the outer nut 2 and rotate it in the forward direction until the stud is tightened;

[0106] Use a socket or a wrench to clamp the outer hexagonal 42 of the push rod 4, and rotate it forward to unscrew the push rod 4. The end of the push rod 4 with the reverse external thread 41 is separated from the contact surface of the stud and loses the bite force.

[0107] The outer nut 2 is manually rotated in the reverse direction until the first internal threaded hole 11 is successfully separated from the thread of the stud.

Claims

1. A hand tool suitable for installing a stud, characterized in that: It comprises an inner nut (1), an outer nut (2), a locking screw (3) and a push rod (4); the outer upper end of the inner nut (1) is provided with an inner nut outer hexagon (13), two symmetrical planes on the outer wall of the inner nut outer hexagon (13) are each provided with a limiting blind hole (12), and a first internal threaded hole (11) is provided inside the inner nut outer hexagon (13), the first internal threaded hole (11) is arranged along the axial direction of the inner nut (1), the first internal threaded hole (11) is matched with a stud to be installed, and the thread length of the first internal threaded hole (11) is less than the thread length of the stud; the end of the outer nut (2) that matches with the inner nut (1) is provided with an outer nut inner hexagon (21), a group of two symmetrical planes on the inner wall of the outer nut inner hexagon (21) are each provided with a third internal threaded hole (22), and the third internal threaded hole (22) is matched with the locking screw (3); The outer nut (2) is provided with a second internal threaded hole (23) at one end that cooperates with the push rod (4), and the second internal threaded hole (23) is a reverse full thread; the thread length of the second internal threaded hole (23) is less than the thread length of the push rod (4); the diameter of the second internal threaded hole (23) is greater than the diameter of the first internal threaded hole (11); the outer side of the second internal threaded hole (23) is an outer hexagonal hole (24) of the outer nut; the locking screw (3) is composed of a screw head, a locking screw thread (32) and a smooth rod (31) from top to bottom; the locking screw (3) is screwed into and passes through the third internal thread (22) of the outer nut, and its smooth rod (31) is embedded in the limiting blind hole (12) of the inner nut, and the locking screw thread (32) cooperates with the third internal thread (22) of the outer nut; the push rod (4) is provided with a push rod reverse external thread (41) at one end that cooperates with the outer nut (2), and the other end of the push rod (4) is provided with a push rod outer hexagonal hole (42).

2. A hand tool suitable for stud installation according to claim 1, characterized in that: The inner nut (1) is machined from 42CrMo material.

3. A hand tool suitable for stud installation according to claim 2, characterized in that: The outer nut (2) is machined from 42CrMo material.

4. A hand tool suitable for stud installation according to claim 1, characterized in that: The locking screw (3) is processed and modified using a standard GB5783-2000 M5×7 screw.

5. A hand tool suitable for stud installation according to claim 1 or 4, characterized in that: The push rod (4) is made of 42CrMo material.

6. A hand tool suitable for installing studs according to any one of claims 1 to 5, characterized in that: The inner nut outer hexagon (13) of the inner nut (1) is installed in cooperation with the outer nut inner hexagon (21) of the outer nut (2) to limit the relative axial displacement of the inner nut (1) and the outer nut (2); the smooth rods (31) of the two locking screws (3) are inserted into the limiting blind holes (12) to limit the relative radial displacement of the inner nut (1) and the outer nut (2).

7. A method for using a hand tool suitable for installing a small-sized stud, characterized in that: A hand tool for installing a stud according to any one of claims 1 to 6, comprising the following steps: Step 1: assemble the outer hexagonal (13) of the inner nut (1) and the inner hexagonal (21) of the outer nut (2) so that the axes of the limiting blind hole (12) and the third inner thread (22) coincide with each other; Step 2: Screw the two locking screws (3) into the third internal thread (22) until the polished rod (31) is inserted into the limiting blind hole (12) and tightened; Step 3: Screw the push rod reverse external thread (41) of the push rod (4) into the second internal thread hole (23) of the external nut (2) until it is tightened; Step 4: Screw one end of the stud into the first internal threaded hole (11) of the internal nut (1) until it is tightened; Step 5: Use a socket or a wrench tool to clamp the outer nut (2) at the outer hexagon (24), and rotate it in the forward direction until the stud is tightened; Step 6: Use a socket or a wrench tool to clamp the outer hexagonal (42) of the push rod (4), and rotate it forward to unscrew the push rod (4). The end of the push rod (4) provided with the reverse external thread (41) is separated from the contact surface with the stud, and the bite force is lost; Step 7: Manually rotate the outer nut (2) in the opposite direction until the first internal threaded hole (11) is successfully separated from the thread of the stud.

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