CN110497358B - A disassembly tool for screws and nuts on curved surfaces and a method of use thereof - Google Patents

Abstract

The present invention provides a disassembly tool for screws and nuts on a curved surface, comprising a tool body, a clamping ring, a core shaft, a screwdriver joint, a quick-change screwdriver, a handle and a plurality of suction cups; in the disassembly process of the screw or nut, as long as the screw or nut is given enough torque and does not slip, the screw or nut with a large binding force can be disassembled. To achieve this goal, it is necessary to give the end face of the screw or nut enough positive pressure. The device of the present application provides a static pressure fulcrum for the disassembly tool through a plurality of suction cups evenly distributed on the tool body, and the clamping ring compresses and transmits a positive pressure of a clamping bolt or nut to the quick-change screwdriver. The positive force of the clamping ring is combined with the torque transmitted to the quick-change screwdriver by the handle to realize the disassembly of the screw or nut. The method of using the disassembly tool provided by the present invention has simple steps and is easy to operate. As long as the suction cup is properly positioned, the screwdriver head is placed on the screw or sleeved on the nut, and the handle is turned, the screw and nut can be disassembled.

Description

A disassembly tool for screws and nuts on curved surfaces and a method of use thereof

Technical Field

The invention relates to the technical field of screw and nut disassembly, and in particular to a disassembly tool for screws and nuts on a curved surface and a use method thereof.

Background Art

A large number of screws are used for connection on the surface of large equipment such as aircraft and high-speed railways. However, due to factors such as environmental corrosion and rubber screw sealing technology, the screws on the surface of large equipment are prone to rust on the threads, stickiness of sealants, corrosion and shallowing of the nail head grooves, etc., which increases the thread bonding force and reduces the torque that can be applied by the screwdriver, often making the screws difficult to remove, directly affecting the maintenance efficiency and quality of these large equipment.

At present, the common screw disassembly devices include: (1) Chinese patent CN03272135.8, which mainly uses the lever principle to increase the positive pressure of the screwdriver, and overcomes the binding force between the threads through the force arm and the screwdriver to loosen the screw. However, this method requires removing at least one screw that can be unscrewed within the tool range in order to provide a fulcrum for the lever with the help of the screw hole. This not only increases the maintenance workload, but also loosens the screw hole that should not be repaired and uses the screw hole as a fulcrum, which will damage the surface structural strength of large equipment and the tooth profile strength of the fulcrum thread hole. (2) Chinese patent CN202271352U, which mainly uses strong destructive disassembly methods such as chiseling, knocking, drilling and tapping, and punching. However, since the screws of large equipment such as aircraft and high-speed railways are mostly made of high-strength and high-hardness metal materials, it is difficult to implement, troublesome to operate, and time-consuming and labor-intensive. In particular, doing so is very likely to damage the surface structural strength of the large equipment, affect the aerodynamic shape, reduce the overall structural strength of the large equipment, and bring great safety hazards to these large equipment running at high speeds. Therefore, the industry is in urgent need of a new type of disassembly tool for screws and nuts on smooth curved surfaces and a method of use.

Summary of the invention

The object of the present invention is to provide a disassembly tool for screws and nuts on a curved surface, comprising a tool body, a clamping ring, a core shaft, a screwdriver joint, a quick-change screwdriver, a handle and a plurality of suction cups; an internal threaded hole is provided on the tool body, the clamping ring is provided with an external thread matching the threaded hole in the tool body, the clamping ring is threadedly connected to the tool body, the clamping ring is provided with a first mounting hole and a second mounting hole which are interconnected from top to bottom, and the diameter of the first mounting hole is smaller than the diameter of the second mounting hole, the screwdriver joint is placed in the second mounting hole, the core shaft passes through the first mounting hole and is connected to the screwdriver joint; the other end of the core shaft is connected to the handle, the screwdriver joint is provided with a mounting hole for connecting a quick-change screwdriver, and the quick-change screwdriver passes through the tool body and is installed on the mounting hole of the screwdriver joint; a connecting frame is connected to the suction cup, the suction cups are distributed on the periphery of the tool body, and the suction cups are connected to the tool body through a connecting shaft.

Preferably, one end of the connecting shaft is provided with a thread and is threadedly connected to the tool body; the other end of the connecting shaft is pin-connected to the connecting frame on the suction cup; a pin hole is provided on the connecting shaft, and the connecting frame on the suction cup is provided with the same pin hole and a connecting hole for placing the connecting shaft, the pin passes through the pin holes on the connecting frame and the connecting shaft to connect the connecting shaft and the connecting frame, and a radial groove is provided on the pin exposed outside the connecting frame, and a spring retaining ring is provided on the groove to fix the pin to prevent the pin from slipping out of the through hole.

Preferably, the quick-change screwdriver comprises a screwdriver shaft and a screwdriver head arranged at the end of the screwdriver shaft, and the screwdriver head comprises a screwdriver head for removing slotted, cross and hexagonal screws and a socket head for removing nuts.

Preferably, the plurality of suction cups are evenly distributed on the tool body, and the plurality of suction cups are centrally symmetrical or axially symmetrical about a mandrel on the tool body.

Preferably, the number of the suction cups is three, and the three suction cups are evenly distributed on the tool body through a connecting frame and a connecting shaft, and the installation angles between the three suction cups are 120 degrees to each other.

The present invention also provides a method for using a screw or nut disassembly tool, comprising the following steps:

S1. Select a quick-change screwdriver of the corresponding shape according to the shape of the screw or nut to be removed, and insert the quick-change screwdriver into the mounting hole of the screwdriver connector;

S2. Move the entire disassembly tool, align the screwdriver head of the quick-change screwdriver with the screw or nut to be disassembled, and adjust the angle of the suction cup according to the curvature of the surface of the equipment where the screw or nut to be disassembled is located, so that the suction cup is completely buckled on the surface of the equipment; and press down the suction cup so that the suction cup is completely sucked on the curved surface of the equipment;

S3. Rotate the clamping ring to push the core shaft and the screwdriver joint downward, so that the screwdriver head of the quick-change screwdriver is tightly against the screw or the sleeve head of the quick-change screwdriver is tightly sleeved on the nut; turn the handle to transfer the rotational torque of the handle to the screw or nut through the quick-change screwdriver, so that the screw or nut can be removed.

The application of the technical solution of the present invention has the following beneficial effects:

(1) The present invention is a tool for removing screws and nuts on a curved surface, comprising a tool body, a clamping ring, a core shaft, a screwdriver joint, a quick-change screwdriver, a handle and a plurality of suction cups. During the process of removing the screw or nut, as long as sufficient torque is given to the screw or nut without slipping, the screw or nut with a large binding force can be removed. To achieve this goal, it is necessary to apply sufficient positive pressure to the end face of the screw or nut. The device of the present application provides a static fulcrum for the removal tool through a plurality of suction cups evenly distributed on the tool body. The clamping ring compresses and transmits a positive pressure to the quick-change screwdriver to clamp the bolt or nut. The positive pressure of the clamping ring is combined with the torque transmitted to the quick-change screwdriver by the handle to realize the removal of the screw or nut. At the same time, the suction cup has a large adsorption area. During the removal process, the suction cup will not damage the smooth surface and appearance of the equipment.

(2) The suction cup of the device of the present application is connected to the tool body by means of a pin connection. Since the clearance between the pin and the pin hole is small, and the clearance between the connecting shaft and the connecting hole of the connecting frame on the suction cup is large, the suction cup can be rotated up and down around the pin by a certain angle, thereby adjusting the angle of the suction cup, thereby allowing the suction cup to be stably adsorbed on surfaces with different curvatures.

(3) The screwdriver heads of the quick-change screwdriver of the device of the present application include screwdriver heads for removing slotted, cross and hexagonal screws and socket heads for removing nuts, which can adapt to the removal of screws and nuts of different models. In addition, the device of the present application can be used not only for removing screws or nuts on curved surfaces, but also for removing screws or nuts on flat surfaces, and has excellent prospects for promotion and application.

(4) The method for using a screw and nut removal tool provided by the present invention has simple steps and is easy to operate. The suction cup is positioned so that the screwdriver head of the quick-change screwdriver is on the screw or on the nut, and the nut can be removed by turning the handle.

In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

FIG1 is a schematic structural diagram of a tool for removing screws and nuts on a curved surface according to the present embodiment;

FIG2 is a schematic diagram of the connection between the tool body, the connecting shaft and the connecting frame in FIG1 ;

FIG3 is a schematic diagram showing the distribution of suction cup positions and disassembly positions of the device of the present application;

Among them, 1. connecting frame, 2. spring clamp, 3. tool body, 4. handle, 5. core shaft, 6. clamping ring, 7. locking nut, 8. connecting shaft, 9. pin, 10. quick-change screwdriver, 11. suction cup, 12. screwdriver connector, 13. screw or nut.

DETAILED DESCRIPTION

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

Referring to Fig. 1 to Fig. 3, a disassembly tool for screws and nuts on a curved surface comprises a tool body 3, a clamping ring 6, a core shaft 5, a screwdriver joint 12, a quick-change screwdriver 10, a handle 4 and a plurality of suction cups 11; the tool body is a solid cylindrical structure, the tool body is provided with an internal threaded hole, the clamping ring is provided with an external thread matching the threaded hole in the tool body, the clamping ring 6 is threadedly connected to the tool body 3, the clamping ring is provided with a first mounting hole and a second mounting hole interconnected from top to bottom, and the diameter of the first mounting hole is smaller than the diameter of the second mounting hole, the screwdriver joint is placed in the second mounting hole, and the core shaft 5 passes through the first mounting hole. The hole is connected to the screwdriver connector 12; the other end of the core shaft 5 is connected to the handle 4, and the screwdriver connector 12 is provided with a mounting hole for connecting a quick-change screwdriver, and the quick-change screwdriver 10 passes through the tool body and is installed on the mounting hole of the screwdriver connector; the quick-change screwdriver includes a screwdriver shaft and a screwdriver head arranged at the end of the screwdriver shaft, and the screwdriver head includes a screwdriver head for removing a slotted, cross and hexagonal screws and a socket head for removing nuts; a connecting frame 1 is connected to the suction cup 11, and the suction cups are distributed on the periphery of the tool body, and the suction cup 11 is connected to the tool body 3 through a connecting shaft 8; a threaded hole for connecting the connecting shaft is provided on the cylindrical surface of the tool body, and the connecting shaft is connected to the tool body 3 through the connecting shaft 8. One end of the shaft is provided with a thread, which is threadedly connected to the tool body, and is further locked by a locking nut 7 sleeved on the connecting shaft 8; the other end of the connecting shaft 8 is pinned to the connecting frame 1 on the suction cup 11; a pin hole is provided on the connecting shaft, and the connecting frame on the suction cup is provided with the same pin hole and a connecting hole for placing the connecting shaft, and the pin 9 passes through the pin holes on the connecting frame and the connecting shaft to connect the connecting shaft 8 and the connecting frame 1, and the pin exposed outside the connecting frame is provided with a radial groove, and the groove is fixed with a spring retaining ring 2 to prevent the pin from slipping out of the through hole; the connecting shaft and the connecting hole of the connecting frame in the device of the present application are connected by a gap, and the pin hole and the pin are fixed. Gap connection, and the gap between the pin hole and the pin is smaller than the gap between the connecting hole of the connecting shaft and the connecting frame; therefore, the suction cup can rotate up and down around the pin at a certain angle, so as to adjust the angle of the suction cup, and then make the suction cup stably adsorbed on surfaces with different curvatures; there are three suction cups, and the three suction cups are evenly distributed on the tool body through three connecting frames and three connecting shafts. The installation angles of the three suction cups are 120 degrees to each other, and are aligned with the center of the core shaft on the tool body. The symmetrically distributed suction cups can provide more stable static support for the entire disassembly tool (provide support points to resist the upward pressure of the screws).

During the disassembly process of the screw or nut, as long as enough torque is given to the screw or nut without slipping, the screw or nut with larger binding force can be disassembled. To achieve this goal, it is necessary to provide a positive pressure to the end face of the screw or nut. The device of the present application provides a static fulcrum for the disassembly tool through multiple suction cups evenly distributed on the tool body. The clamping ring transmits a positive pressure of the clamping bolt or nut to the quick-change screwdriver. The positive force of the clamping ring combined with the torque transmitted to the quick-change screwdriver by the handle realizes the disassembly of the screw or nut 13. At the same time, the suction cup has a large adsorption area. During the disassembly process, the suction cup will not damage the smooth surface and shape of the equipment.

The present invention also provides a method for using a screw or nut disassembly tool, which uses the above-mentioned screw or nut disassembly tool for a curved surface, and comprises the following steps:

S1. Select a quick-change screwdriver of the corresponding shape according to the shape of the screw or nut to be removed, and insert the quick-change screwdriver into the mounting hole of the screwdriver connector;

S2. Move the entire disassembly tool, align the screwdriver head of the quick-change screwdriver with the screw or nut to be disassembled, and adjust the angle of the suction cup according to the curvature of the surface of the equipment where the screw or nut to be disassembled is located, so that the suction cup is completely buckled on the surface of the equipment; and press down the suction cup so that the suction cup is completely sucked on the curved surface of the equipment;

S3. Rotate the clamping ring to push the core shaft and the screwdriver joint downward, so that the screwdriver head of the quick-change screwdriver is tightly against the screw or the sleeve head of the quick-change screwdriver is tightly sleeved on the nut; turn the handle to transfer the rotational torque of the handle to the screw or nut through the quick-change screwdriver, so that the screw or nut can be removed.

The method for using a screw and nut removal tool provided by the present invention has simple steps and is easy to operate. The method only requires that the suction cup is properly positioned so that the screwdriver head of the quick-change screwdriver is placed on the screw or sleeved on the nut, and the nut can be removed by turning the handle. The method is highly practical.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (7)

1. The dismounting tool for the screw and the nut on the curved surface is characterized by comprising a tool body, a compression ring, a lifting shaft, a screwdriver connector, a quick-change screwdriver, a handle and a plurality of suckers; the tool body is provided with an internal threaded hole, the compression ring is provided with external threads matched with the internal threaded hole of the tool body, the compression ring is in threaded connection with the tool body, the compression ring is provided with a first mounting hole and a second mounting hole which are mutually communicated from top to bottom, the diameter of the first mounting hole is smaller than that of the second mounting hole, the screwdriver joint is placed in the second mounting hole, and the lifting core shaft penetrates through the first mounting hole to be connected with the screwdriver joint; the other end of the lifting shaft is connected with the handle, the screwdriver connector is provided with a mounting hole for connecting a quick-change screwdriver, and the quick-change screwdriver penetrates through the tool body and is mounted on the mounting hole of the screwdriver connector; the sucker is connected with a connecting frame, is distributed on the periphery of the tool body and is connected with the tool body through a connecting shaft;

One end of the connecting shaft is provided with threads which are connected with the tool body through threads; the other end of the connecting shaft is in pin joint with a connecting frame on the sucker; the connecting shaft is provided with a pin hole, the connecting frame on the sucker is provided with the same pin hole and a connecting hole for placing the connecting shaft, the pin penetrates through the connecting frame and the pin hole on the connecting shaft to connect the connecting shaft and the connecting frame, the pin exposed out of the connecting frame is provided with a radial groove, and the groove is provided with a spring snap ring for fixing, so that the pin is prevented from sliding out of the through hole.

2. The disassembling tool for screws and nuts on curved surfaces according to claim 1, wherein a lock nut is sleeved at one end of the connecting shaft, which is in threaded connection with the tool body.

3. The tool for removing screws and nuts from curved surfaces according to claim 1, wherein the connecting shaft is in clearance connection with the connecting hole of the connecting frame, the pin hole is in clearance connection with the pin, and the clearance between the pin hole and the pin is smaller than the clearance between the connecting shaft and the connecting hole of the connecting frame.

4. A tool for removing screws and nuts from curved surfaces according to claim 3, wherein the quick change screwdriver comprises a screwdriver shaft and a screwdriver head provided at the end of the screwdriver shaft, the screwdriver head comprising a screwdriver head for removing the in-line, cross and hexagonal screws and a socket head for removing the nuts.

5. The tool for removing screws and nuts from a curved surface according to claim 4, wherein a plurality of suction cups are uniformly arranged on the tool body, and the suction cups are symmetrical about a center of a lifting shaft or axisymmetrical about the center of the lifting shaft on the tool body.

6. The disassembling tool for screws and nuts on curved surfaces according to claim 5, wherein the number of the suckers is three, the three suckers are uniformly distributed on the tool body through the connecting frame and the connecting shaft, and the installation angles among the three suckers are 120 degrees.

7. A method for using a screw and nut removing tool, comprising the screw and nut removing tool on a curved surface according to any one of claims 1 to 6; the method comprises the following steps:

s1, selecting a quick-change screwdriver with a corresponding shape according to the shape of a screw or nut to be disassembled, and inserting the quick-change screwdriver into a mounting hole of a screwdriver connector;

S2, moving the whole disassembling tool, aligning a screwdriver head of the quick-change screwdriver with a screw or a nut to be disassembled, and adjusting the angle of the sucker according to the curvature of the surface of the equipment where the screw or the nut to be disassembled is positioned so that the sucker is completely buckled on the surface of the equipment; pressing down the sucker to make the sucker fully sucked on the curved surface of the equipment;

s3, rotating the compression ring to push down the lifting shaft and the screwdriver connector, so that the screwdriver head of the quick-change screwdriver is tightly propped against the screw or the sleeve head of the quick-change screwdriver is tightly sleeved on the nut; the handle is rotated, the rotating torque force of the handle is transmitted to the screw or the nut through the quick-change screwdriver, and the screw or the nut can be detached.