Dismounting device for upper screw of cylindrical structure

Abstract

The invention belongs to the technical field of mechanical engineering and tools, and discloses a device for dismounting a screw on a cylindrical structure, which comprises an adjusting mechanism provided with a support frame, a stretching screw rod and a metal pull rope, the support frame is arc-shaped and is of an opening structure, the metal pull rope is hinged with one end of the stretching screw rod, and the stretching screw rod is connected with the metal pull rope; the other end of the stretching screw rod penetrates through the supporting frame and is connected with an adjusting nut; the limiting mechanism is provided with a limiting assembly, a supporting bearing and a bearing frame, the supporting bearing is installed on the bearing frame, after the screwdriver is installed on the limiting assembly, the screwdriver and the limiting assembly are connected to the supporting bearing in an inserted mode, and then the bearing frame is installed on the supporting frame. The positive pressure between the screwdriver head and a screw is increased, and the screwdriver handle is rotated by hand to disassemble the screw.

Description

Technical Field

[0001] This invention relates to a screw removal device on a cylindrical structure, belonging to the field of mechanical engineering and tool technology. Background Technology

[0002] A screw is a threaded fastener used to connect and secure two or more components. It generates axial force through rotational motion, achieving the fastening, adjustment, or sealing of mechanical structures. Screws are widely used in machinery, electronics, construction, automotive, aerospace, and other fields, and are one of the most fundamental parts in industrial manufacturing and daily maintenance.

[0003] Servo mechanisms are typically mounted on a cylindrical housing and secured with screws. Threadlocker is applied to the screw threads and tightened as needed to prevent loosening. After vibration or a period of inactivity, the product may experience issues such as thread plastic deformation, screw seizing in the bore, electrochemical corrosion between the screw material and the connector, and head damage to countersunk screws or hex socket screws. If these issues require removal from the cylindrical housing for rework, repair, or inspection, disassembly can be difficult and, in severe cases, may damage the product.

[0004] When disassembly is difficult, an electric or pneumatic impact wrench may be used to loosen the screw thread and the bottom hole of the connector by high-frequency vibration, or the screw may be locally heated to loosen the connection by utilizing the difference in thermal expansion coefficients. However, both of these methods carry the risk of damaging the product.

[0005] Therefore, this invention designs a device that, with the assistance of manual means, can be fixed to the outside of a cylindrical shell. After the tool for removing screws is connected to the screw head, the positive pressure between the tool handle and the screw head can be adjusted. By manually rotating the tool handle, the resistance of friction and corrosion at the screw thread can be overcome, and the screw can be easily removed, effectively protecting the product. Summary of the Invention

[0006] The purpose of this invention is to provide a screw removal device for cylindrical structures to solve the problems of difficulty in removing screws from cylindrical structures, which may cause damage to the product in severe cases. The device allows for easy removal of screws from the product while protecting it from damage.

[0007] The technical solution of this invention is as follows: To achieve the above objectives, the present invention employs the following technical solution: A screw removal device for a cylindrical structure, comprising: The adjustment mechanism has a support frame, a tension screw and a metal pull rope. The support frame is designed to be arc-shaped and has an open structure. One end of the metal pull rope and the tension screw are hinged together, and the other end of the tension screw passes through the support frame and is connected to an adjustment nut. The limiting mechanism includes a limiting component, a supporting bearing, and a bearing frame. The supporting bearing is mounted on the bearing frame. After the limiting component is fitted with a screwdriver, it is inserted into the supporting bearing, and then the bearing frame is mounted on the supporting frame.

[0008] As a further embodiment of the present invention: through holes are provided at both ends of the support frame, the tension screw is clearance-fitted with the through holes, and countersunk grooves are also provided at both ends of the support frame, which are concentrically set with the through holes to facilitate the use of the adjusting nut.

[0009] As a further embodiment of the present invention: a plane is provided on the outer surface of the middle of the support frame, a screwdriver working hole is provided on the plane, and observation holes are provided on both sides of the screwdriver working hole.

[0010] As a further aspect of the present invention, a plurality of threaded holes are uniformly provided on the plane for threaded connection with the bearing bracket.

[0011] As a further aspect of the present invention: the tension screw has a connector, a slot is provided on the connector, and there are cutting planes on the two outer cylindrical surfaces corresponding to the slot, and the cutting planes have pin holes through the shaft.

[0012] As a further aspect of the present invention: a cotter pin is inserted into the pin hole, the cotter pin being in the form of a stepped shaft, with a limiting groove formed on the outermost cylindrical surface of the small end, and an opening retaining ring installed on the limiting groove.

[0013] As a further aspect of the present invention: the metal pull rope has perforated lugs at both ends, which can be inserted into the slots of the connector and fitted onto the cotter pin.

[0014] As a further aspect of the present invention: the bearing bracket is a cuboid structure with a stepped hole in the middle of its length direction surface. A support bearing can be embedded in the stepped hole, which is a through hole so that a screwdriver can pass through. Countersunk screw holes are opened at the four corners of the bearing bracket.

[0015] As a further aspect of the present invention: the supporting bearing is an angular contact ball bearing, which can withstand axial and radial loads.

[0016] As a further aspect of the present invention: the limiting component adopts a split structure design, which includes two opposing half-mouth supports. The half-mouth supports are in the form of a stepped shaft with a 180° circumference. An arc boss is provided in the central hole for locking the shank of a screwdriver. The small shaft sections of the two half-mouth supports can be inserted into the inner hole of the support bearing.

[0017] The beneficial effects of this invention are as follows: 1. Increase the positive pressure between the screwdriver tip and the screw, and turn the handle by hand to remove the screw.

[0018] 2. With the assistance of manual means, it can be fixed to the outside of the cylindrical shell. After the tool for removing screws is connected to the screw head, the positive pressure between the tool handle and the screw head can be adjusted. By manually turning the handle, the resistance of friction and corrosion at the screw thread can be overcome, and the screw can be easily removed, effectively protecting the product.

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 An explosion rendering of the dismantling device; Figure 2 This is an overall rendering of the disassembly device; Figure 3 This is a schematic diagram of the support frame structure; Figure 4 A schematic diagram of the half-port support for the limiting component; Figure 5 This is a schematic diagram of the bearing bracket structure.

[0021] The attached figures are labeled as follows: adjustment structure 1, support frame 11, tension screw 12, metal pull rope 13, limiting mechanism 2, limiting component 21, support bearing 22, bearing frame 23, cotter pin 3, nut 4. Detailed implementation method: To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be described in more detail below with reference to the accompanying drawings.

[0022] In the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present invention.

[0023] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] The following is in conjunction with the appendix Figure 1-5 The embodiments of the present invention will be described in detail below.

[0025] Example 1: This invention provides a screw removal device for a cylindrical structure, comprising: The adjustment mechanism has a support frame, a tension screw and a metal pull rope. The support frame is designed to be arc-shaped and has an open structure. One end of the metal pull rope and the tension screw are hinged together, and the other end of the tension screw passes through the support frame and is connected to an adjustment nut. The limiting mechanism includes a limiting component, a supporting bearing, and a bearing frame. The supporting bearing is mounted on the bearing frame. After the limiting component is fitted with a screwdriver, it is inserted into the supporting bearing, and then the bearing frame is mounted on the supporting frame.

[0026] Preferably, through holes are provided at both ends of the support frame, and the tension screw is clearance-fitted with the through holes. The support frame is also provided with countersunk grooves at both ends, which are concentric with the through holes to facilitate the use of the adjusting nuts.

[0027] Preferably, a flat surface is provided on the outer surface of the middle of the support frame, and a screwdriver working hole is provided on the flat surface, with observation holes provided on both sides of the screwdriver working hole.

[0028] Preferably, a plurality of threaded holes are evenly provided on the plane for threaded connection with the bearing bracket.

[0029] Preferably, the tension screw has a connector with a slot, and two outer cylindrical surfaces corresponding to the slot have cutting planes with pin holes through the shaft.

[0030] Preferably, a cotter pin is inserted into the pin hole. The cotter pin is in the form of a stepped shaft, with a limiting groove on the outermost cylindrical surface of the small end, and an open retaining ring is installed on the limiting groove.

[0031] Preferably, the metal pull rope has perforated lugs at both ends, which can be inserted into the slots of the connector and fitted onto the cotter pin.

[0032] Preferably, the bearing bracket is a cuboid structure with a stepped hole in the middle of its length direction surface. A support bearing can be embedded in the stepped hole, which is a through hole so that a screwdriver can pass through. Countersunk screw holes are opened at the four corners of the bearing bracket.

[0033] Preferably, the support bearing is an angular contact ball bearing that can withstand axial and radial loads.

[0034] Preferably, the limiting component adopts a split structure design, which includes two opposing half-port supports. The half-port supports are in the form of a stepped shaft with a 180° circumference. An arc boss is provided in the central hole for locking the shank of a screwdriver. The small shaft sections of the two half-port supports can be inserted into the inner hole of the support bearing.

[0035] Example 2: like Figure 1As shown, the technical solution of the present invention is to design a screw removal device on a cylindrical structure, including: a support frame 11, tension screws 12, a metal pull rope 13, a limiting component 21, a supporting bearing 22, a bearing bracket 23, a cotter pin 3, and a nut 4, etc., wherein two tension screws 12 pass through the two end holes of the support frame 11, and nuts 4 are installed on the threaded sections of the tension screws 12. The other ends of the two tension screws 12 are connected to the metal pull rope 13 through the cotter pin 3. The cylindrical product can be placed in the arc formed by the support frame 11 and the metal pull rope 13. The recessed section of the screwdriver handle is embedded in the inner hole of the limiting component 21, and the two half-hole supports of the limiting component 21 are inserted into the holes of the supporting bearing 22, and then installed on the support frame 11 together with the bearing bracket 23. The screwdriver tip of the handle corresponds to the slot or cross slot of the screw on the cylindrical structure. Tightening the two nuts 54 increases the positive pressure between the screwdriver tip and the screw. By turning the handle by hand, the screw can be removed.

[0036] The support frame 11 is a key support component of the entire device. It integrates the bearing frame 23, the support bearing 22, the limiting component 21, etc. The limiting component 21 consists of two semi-circular supports. The semi-circular supports are in the form of a semi-circular ring structure. The top surface of the ring is flattened, and there is a through hole in the center of the surface. There are four screw holes around the surface for docking with the bearing frame 23.

[0037] The bearing 2 is inserted into the bottom hole of the stepped hole of the bearing bracket 23, and then the bearing bracket 23 and the support bracket 11 are connected together with four hexagonal screws. Then the tool holder is placed on the part of the limiting component 21 with the arc boss to restrict the axial movement of the tool holder. At this time, the small shaft end of the limiting component 21 is pressed into the inner ring of the support bearing 22, thus completing the installation of the screwdriver tool holder.

[0038] The threaded ends of the two tension screws 12 pass through the lower end of the small-diameter hole of the support frame 11, and the nuts 4 are installed on the threaded sections of the tension screws 12. The nuts are then placed in the stepped hole of the support frame 11. Then the metal rope 13 and the tension screws 12 are fixed together through the open retaining ring 3, wherein the two ends of the lugs of the metal rope can rotate around the main shaft of the open retaining ring inside the tension screw 12.

[0039] When the screws of the cylindrical structural component need to be removed, the removal device is placed on the outer ring of the cylindrical product. A protective layer can be placed on the parts of the metal pull rope 13 and the support frame 11 that are in contact with the product. Then, a suitable screwdriver bit is selected and matched with the screw to be removed. The two nuts 4 are tightened with the tool. As the two nuts 4 are tightened, the threaded section of the pull rope screw 12 is unscrewed, and the positive pressure of the screwdriver bit and the head of the screw to be removed increases. When the handle is rotated, the limiting component 21 can be driven to rotate on the support bearing 22. When the positive pressure increases to a certain level, the screw can be removed by rotating the handle.

[0040] Example 3: This invention provides a screw removal device for a cylindrical structure, comprising: a support frame 11, tension screws 12, a metal pull rope 13, a limiting component 21, a support bearing 22, a bearing bracket 23, a cotter pin 3, and nuts 4. Two tension screws 12 pass through the two end holes of the support frame 11. Nuts 5 are installed on the threaded sections of the tension screws 12. The other ends of the two tension screws 12 are connected to the metal pull rope 13 via cotter pins 3. The cylindrical product can be placed within the arc formed by the support frame 4 and the metal pull rope 7. The recessed section of the screwdriver handle is embedded in the inner hole of the limiting component 21. The limiting component 21 is inserted into the hole of the support bearing 22 and then installed on the support frame 11 together with the bearing bracket 23. The screwdriver tip corresponds to the slot or Phillips head of the screw on the cylindrical structure. Tightening the two nuts 4 increases the positive pressure between the screwdriver tip and the screw. By manually rotating the screwdriver handle, the screw can be removed.

[0041] The support frame 11, as a key support component of the entire device, integrates the bearing frame 23, the support bearing 22, the limiting component 21, etc. It is a semi-circular ring structure. The top surface of the ring is flattened and has a through hole. There are four screw holes around the through hole for docking with the bearing frame 23. The two ends of the support frame 11 have through holes on their arcs. In addition, the two ends of the support frame also have grooves, which are concentric with the through holes, to facilitate the use of adjusting nuts.

[0042] The bearing bracket 23 is a cuboid structure with a stepped hole in the middle of its length direction. A support bearing 22 can be embedded in the stepped hole, and a tool holder can pass through the bottom hole. Countersunk screw holes are opened at the four corners of the stepped hole for docking with the support bracket 11.

[0043] The support bearing 22 is mounted on the bearing bracket 23 and is an angular contact ball bearing that can withstand axial and radial loads. Two paired limiting components 21 are embedded in the inner hole of the support bearing 22.

[0044] The half of the limiting component 21 is a stepped shaft with a 180° circumference. There is an arc boss in the center hole. It can be processed into two parts along the center axis from the complete stepped shaft. The small shaft section of the limiting component 21 can be inserted into the inner hole of the support bearing 22.

[0045] The tension screws 12 are used in pairs. One end is a screw with a threaded section at the head that can pass through the small-diameter hole of the stepped hole in the support frame 11. The other end is a cylindrical structure with a slot on the end face. There are cutting planes on the two outer cylindrical surfaces corresponding to the slots, and the cutting planes have pin holes through the axis.

[0046] The nuts 4 are used in pairs and are installed on the threaded section of the tension screw 12. When in use, one end face of the nut 4 is in contact with the bottom surface of the groove of the support frame 11.

[0047] The metal pull rope 13 has hollow lugs at both ends, which can be inserted into the slots of the tension screw 12. The pin holes of the support frame 11 are aligned with the lugs of the metal pull rope 13, and the cotter pin 3 can connect the two.

[0048] The cotter pin 3 is in the form of a stepped shaft, with a groove on the outermost cylindrical surface of the small shaft. An open retaining ring is installed on the groove to restrict the movement of the cotter pin 3 along its axial direction.

[0049] Thus, the objective of this invention has been achieved.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A screw removal device for a cylindrical structure, characterized in that, include: The adjustment mechanism has a support frame, a tension screw and a metal pull rope. The support frame is designed to be arc-shaped and has an open structure. One end of the metal pull rope and the tension screw are hinged together, and the other end of the tension screw passes through the support frame and is connected to an adjustment nut. The limiting mechanism includes a limiting component, a supporting bearing, and a bearing frame. The supporting bearing is mounted on the bearing frame. After the limiting component is fitted with a screwdriver, it is inserted into the supporting bearing, and then the bearing frame is mounted on the supporting frame.

2. The screw removal device for a cylindrical structure according to claim 1, characterized in that, Through holes are provided at both ends of the support frame, and the tension screw is clearance-fitted with the through holes. The support frame is also provided with countersunk grooves at both ends, which are concentric with the through holes to facilitate the use of the adjusting nuts.

3. The screw removal device for a cylindrical structure according to claim 2, characterized in that, A flat surface is provided on the outer surface of the middle of the support frame, and a screwdriver working hole is provided on the flat surface. Observation holes are provided on both sides of the screwdriver working hole.

4. The screw removal device for a cylindrical structure according to claim 3, characterized in that, Several threaded holes are also evenly provided on the plane for threaded connection with the bearing bracket.

5. A screw removal device for a cylindrical structure according to claim 4, characterized in that, The tension screw has a connector with a slot. The connector has two cutting surfaces on its two outer cylindrical surfaces corresponding to the slot, and the cutting surfaces have pin holes through the shaft.

6. A screw removal device for a cylindrical structure according to claim 5, characterized in that, A cotter pin is inserted into the pin hole. The cotter pin is in the form of a stepped shaft. A limiting groove is opened on the outermost cylindrical surface of the small end, and an opening retaining ring is installed on the limiting groove.

7. A screw removal device for a cylindrical structure according to claim 6, characterized in that, The metal pull rope has perforated lugs at both ends, which can be inserted into the slots of the connector and fitted onto the cotter pin.

8. A screw removal device for a cylindrical structure according to claim 7, characterized in that, The bearing bracket is a cuboid structure with a stepped hole in the middle of its length direction. A support bearing can be embedded in the stepped hole, which is a through hole so that a screwdriver can pass through. Countersunk screw holes are opened at the four corners of the bearing bracket.

9. A screw removal device for a cylindrical structure according to claim 8, characterized in that, The support bearing is an angular contact ball bearing that can withstand axial and radial loads.

10. A screw removal device for a cylindrical structure according to any one of claims 1-9, characterized in that, The limiting component adopts a split structure design, which includes two opposing half-port supports. The half-port supports are in the form of a stepped shaft with a 180° circumference. An arc boss is provided in the center hole for locking the shank of a screwdriver. The small shaft sections of the two half-port supports can be inserted into the inner hole of the support bearing.

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