CN111069690A

CN111069690A - Bolt and nut decomposing device

Info

Publication number: CN111069690A
Application number: CN201911404609.4A
Authority: CN
Inventors: 刘廷法; 黄茜; 徐德强; 张聪
Original assignee: Dalian Changfeng Industrial Corp
Current assignee: Dalian Changfeng Industrial Corp
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-28

Abstract

The invention discloses a bolt and nut decomposing device, which comprises: the cutting device comprises a cylindrical liner, a cutting knife, a spring, a sleeve and a rotary push rod; the cylindrical gasket is axially provided with a through hole and is used for being sleeved on the outer circumference of a bolt and a nut to be decomposed when in use; one side of the inner wall of the through hole is provided with a square hole along the radial direction; the cutting knife comprises a knife head and a knife handle, wherein the knife handle is in a square column shape and is arranged in a square hole, and the square hole is used for circumferentially limiting the knife handle; the cutter head is arranged in the through hole of the cylindrical liner and is fixedly connected with one end, located in the square hole, of the cutter handle, one side, provided with the square hole, of the cylindrical liner is fixedly connected with one end of the sleeve, the other end of the cutter handle extends out of the square hole in the cylindrical liner and is located in the sleeve and is in sliding fit with the sleeve, and one end of the rotary push rod extends into the sleeve and is in threaded connection with the sleeve; and the end part of the rotary push rod is abutted against the knife handle and used for pushing the knife handle to move linearly.

Description

Bolt and nut decomposing device

Technical Field

The invention relates to the technical field of aviation equipment, in particular to a bolt and nut decomposing device.

Background

The bolt and the nut are important parts for connecting the airplane accessory and the airplane body, one part of the bolt and the nut are fixed on the airplane body for a long time and bear weather erosion and rust, and the other part of the bolt and the nut need to be frequently and repeatedly disassembled due to failure, so that the butted part of the bolt and the nut is damaged; when the accessory is disassembled, the accessory is often damaged due to the difficulty in disassembling the bolt and the nut, and the accessory repairing cost is greatly increased. The existing solution is to use tools such as a riveter flat shovel, a saw blade, a pneumatic drill and an angle grinder to carry out decomposition treatment, but the tools are sometimes restricted by conditions such as space environment and the like, so that the construction is difficult, the forced construction causes secondary damage of accessories, and the repair cost is increased.

At present, the difficulty of decomposing the bolt and the nut brings great mass pressure to an operator, and a tool which can solve the problem that only the bolt and the nut are destructively decomposed under the restriction of space environment so as to reduce or eliminate secondary damage of accessories is urgently needed.

Disclosure of Invention

In view of the above, the present invention provides a bolt and nut disassembling device, which can only perform destructive disassembly on a bolt and a nut under the restriction of space environment to reduce or eliminate secondary damage of accessories.

The technical scheme of the invention is as follows: a bolt and nut disassembling device includes: the cutting device comprises a cylindrical liner, a cutting knife, a spring, a sleeve and a rotary push rod; the cylindrical gasket is axially provided with a through hole and is used for being sleeved on the outer circumference of a bolt and a nut to be decomposed when in use; one side of the inner wall of the through hole is provided with a square hole along the radial direction;

the cutting knife comprises a knife head and a knife handle, wherein the knife handle is in a square column shape and is arranged in a square hole, and the square hole is used for circumferentially limiting the knife handle; the cutter head is arranged in the through hole of the cylindrical liner and is fixedly connected with one end, located in the square hole, of the cutter handle, one side, provided with the square hole, of the cylindrical liner is fixedly connected with one end of the sleeve, the other end of the cutter handle extends out of the square hole in the cylindrical liner and is located in the sleeve and is in sliding fit with the sleeve, and one end of the rotary push rod extends into the sleeve and is in threaded connection with the sleeve; the end part of the rotary push rod is abutted against the cutter handle and is used for pushing the cutter handle to move linearly;

wherein, the cutter head of the cutting knife is arc-shaped, and the inner concave surface of the cutter head is aligned to the bolt and the nut to be decomposed; the handle is sleeved with a spring, one end of the spring is abutted against the cylindrical liner, and the other end of the spring is abutted against a shaft shoulder at one end of the handle abutted against the rotary push rod.

Preferably, the method further comprises the following steps: the other end of the rotating push rod is provided with a mounting hole along the radial direction, and the stressing rod is mounted in the radial mounting hole of the rotating push rod and used for stressing the rotating push rod to enable the rotating push rod to rotate so as to push the cutting knife to move forwards.

Preferably, the method further comprises the following steps: and the steel ball is arranged between the cutting knife and the rotary push rod and is used for transmitting the force applied by the rotary push rod to the cutting knife.

Preferably, the other side of the through hole inner wall of the cylindrical liner is provided with internal teeth for blocking the bolt and the nut to be decomposed.

Has the advantages that:

(1) the rotary push rod is rotated to apply force to the cutting knife sleeved with the spring, so that the bolt and the nut are cut off, the larger the force is, the larger the acting force of the cutting knife on the bolt and the nut is, the operation is simple, the use is convenient and fast, the requirement on space is low, secondary influence of vibration generated by decomposition of the bolt and the nut on structural strength and other accessories is reduced, the decomposition method is changed, the quality hidden danger is eliminated, and the cost is saved.

Drawings

FIG. 1 is a schematic view of the decomposing apparatus according to the present invention.

Wherein, the device comprises a cylindrical gasket 1, a cutting knife 2, a spring 3, a steel ball 4, a sleeve 5, a rotary push rod 6 and a stress application rod 7.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

Example 1:

the embodiment provides a bolt and nut decomposing device which can only carry out destructive decomposition on the bolt and the nut under the restriction of space environment so as to reduce or eliminate secondary damage of accessories.

The disassembling device mainly performs disassembling on bolts and nuts with the diameter of less than 10 mm.

The decomposition device comprises:

the cutting device comprises a cylindrical gasket 1, a cutting knife 2, a spring 3, a sleeve 5, a rotary push rod 6 and a stress application rod 7.

The connection relationship of the decomposition device is as follows:

the cylindrical liner 1 is axially provided with a through hole with the diameter larger than the outer diameter of the bolt and the nut to be decomposed, inner teeth with set tooth width are arranged on one side of the inner wall of the through hole (the tooth width of the inner teeth is matched with the thread pitch of the bolt and the nut to be decomposed), the inner teeth have blocking effect on the bolt and the nut to be decomposed (the bolt and the nut are fixed by the friction effect of the inner teeth to prevent the bolt and the nut from rotating relatively), and a square hole is formed in the radial direction at the relative position of the inner wall of the; the cutting knife 2 comprises a knife head and a knife handle, the knife handle is in a square column shape, one end of the knife handle is arranged in a square hole, the square hole is used for circumferential limiting of the knife handle to prevent circumferential rotation of the knife handle, the knife head is arranged in a through hole of the cylindrical liner 1 and is fixedly connected with one end, located in the square hole, of the knife handle, one side, provided with the square hole, of the cylindrical liner 1 is fixedly connected with one end of the sleeve 5, the end, located at the cylindrical liner 1, is a front end, the other end of the knife handle is located inside the sleeve 5, the knife head can retract into the sleeve 5 along with the knife handle, the rear end of the sleeve 5 is provided with an internal thread, one end of the rotary push rod 6 extends into the sleeve 5 and is in; the other end of the rotating push rod 6 is provided with a mounting hole along the radial direction, and the forcing rod 7 is arranged in the mounting hole along the radial direction of the rotating push rod 6 and used for forcing the rotating push rod 6 to rotate and advance the rotating push rod 6 so as to push the cutting knife 2 to move forwards; wherein, the cutter head of the cutting knife 2 is arc-shaped, and the inner concave surface of the cutter head is aligned with the bolt and the nut to be decomposed, thereby being beneficial to tight cutting and rapid cutting; the knife handle is sleeved with a spring 3, one end of the spring 3 props against the outer circumferential surface of the cylindrical liner 1, and the other end of the spring props against a shaft shoulder arranged at one end of the knife handle opposite to the rotary push rod 6.

The working principle of the decomposition device is as follows:

sleeving an axial through hole of the cylindrical gasket 1 on the outer circumference of a bolt and a nut to be disassembled; the force application rod 7 is rotated to push the rotary push rod 6 to move forwards, so that the cutting knife 2 is pushed to move forwards, meanwhile, the spring 3 is gradually compressed, and the knife head is stressed to cut into the bolt to be decomposed along the radial direction;

the force application rod 7 is continuously rotated to apply force to the cutting knife 2, so that the cutter head cuts off and destroys the bolt from the circumferential direction of the bolt, and the purpose of decomposing the bolt and the nut is achieved; the force applying rod 7 is rotated in the opposite direction to enable the rotary push rod 6 to move backwards, the cutter 2 drives the cutter head to move backwards under the action of the restoring force of the spring 3, so that a space is reserved, the cylindrical liner 1 is taken down from the bolt and the nut, and the disassembling device is taken down from the bolt and the nut; and decomposing the damaged bolt and nut by adopting a conventional decomposition tool.

Example 2:

on the basis of embodiment 1, the decomposition device further includes: the steel ball 4 is additionally arranged between the cutting knife 2 and the rotary push rod 6 and used for transmitting the force applied by the rotary push rod 6 to the cutting knife 2 through the rolling of the steel ball 4.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bolt and nut disassembling device is characterized by comprising: the cutting device comprises a cylindrical gasket (1), a cutting knife (2), a spring (3), a sleeve (5) and a rotary push rod (6); the cylindrical gasket (1) is axially provided with a through hole and is used for being sleeved on the outer circumference of a bolt and a nut to be decomposed when in use; one side of the inner wall of the through hole is provided with a square hole along the radial direction;

the cutting knife (2) comprises a knife head and a knife handle, the knife handle is in a square column shape and is arranged in a square hole, and the square hole circumferentially limits the knife handle; the cutter head is arranged in a through hole of the cylindrical liner (1) and fixedly connected with one end, located in a square hole, of the cutter handle, one side, provided with the square hole, of the cylindrical liner (1) is fixedly connected with one end of the sleeve (5), the other end of the cutter handle extends out of the square hole in the cylindrical liner (1) and then is located in the sleeve (5) and is in sliding fit with the sleeve (5), and one end of the rotary push rod (6) extends into the sleeve (5) and is in threaded connection with the sleeve (5); the end part of the rotary push rod (6) is abutted against the cutter handle and is used for pushing the cutter handle to move linearly;

wherein, the cutter head of the cutting knife (2) is arc-shaped, and the inner concave surface of the cutter head is aligned to the bolt and the nut to be decomposed; the knife handle is sleeved with a spring (3), one end of the spring (3) is abutted against the cylindrical liner (1), and the other end of the spring is abutted against a shaft shoulder at one end of the knife handle abutted against the rotary push rod (6).

2. The bolt and nut disassembling apparatus according to claim 1, further comprising: the other end of the rotating push rod (6) is provided with a mounting hole along the radial direction, and the stressing rod (7) is mounted in the radial mounting hole of the rotating push rod (6) and used for stressing the rotating push rod (6) to enable the rotating push rod (6) to rotate so as to push the cutting knife (2) to move forwards.

3. The bolt and nut disassembling apparatus according to claim 1, further comprising: the steel ball (4) is arranged between the cutting knife (2) and the rotary push rod (6) and is used for transmitting the force applied by the rotary push rod (6) to the cutting knife (2).

4. The bolt and nut splitter as claimed in claim 1, wherein the other side of the inner wall of the through hole of the cylindrical spacer (1) is provided with internal teeth for blocking the bolt and nut to be split.