Knurled screw disassembling and assembling tool

Abstract

The utility model relates to the technical field of screw disassembling and assembling tools, and discloses a knurled screw disassembling and assembling tool which comprises a shaft sleeve and an elastic clamping piece, a connecting shaft is arranged at one end of the shaft sleeve and can be connected with a power device outputting rotary motion, and a concave cavity used for containing the elastic clamping piece is formed in the other end of the shaft sleeve. A groove is formed in the end, away from the connecting shaft, of the elastic clamping piece. When the knurled screw needs to be disassembled and assembled, the elastic clamping piece is clamped at the knurled end of the knurled screw in a sleeving mode through the groove, in the process, the groove is extruded by the inner side wall of the concave cavity to clamp the knurled end, then the connecting shaft is controlled to rotate, the knurled screw can be tightened through the shaft sleeve and the elastic clamping piece, and the knurled screw can be unscrewed by reversely rotating the connecting shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, and particularly relates to a knurled screw disassembly and assembly tool. Background Art

[0002] A knurled screw is a screw designed specifically for convenient manual screwing. Its feature is that the head is provided with knurling that can increase the friction. The disassembly and assembly of the screw can be achieved by manual screwing, which can effectively improve the operation efficiency.

[0003] Since knurled screws can usually only be tightened manually, it is difficult to form a unified tightening torque. Moreover, when a large number of knurled screws need to be disassembled and assembled, there are problems such as high labor intensity and low work efficiency.

[0004] In addition, the existing screw tightening devices are mainly developed for cross-slot, flat-slot, and hexagon head screws, and there is currently no tool that matches the knurled screw.

[0005] Therefore, how to provide a disassembly and assembly tool suitable for knurled screws is a technical problem that those skilled in the art need to solve currently. Summary of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a knurled screw disassembly and assembly tool, which can effectively ensure the tightening effect and improve the work efficiency.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A knurled screw disassembly and assembly tool includes: a bushing and an elastic clamping member. One end of the bushing is provided with a connecting shaft, and the other end of the bushing is provided with a cavity for accommodating the elastic clamping member. One end of the elastic clamping member far away from the connecting shaft is provided with a groove. When the elastic clamping member clamps the knurled end of the knurled screw through the groove, the groove is squeezed by the inner side wall of the cavity to clamp the knurled end.

[0009] In some technical solutions, the elastic clamping member includes a connecting end and a clamping end. The connecting end is slidably connected to the cavity along the axial direction of the cavity. The groove is arranged at one end of the clamping end far away from the connecting end. The outer diameter of the outer side wall of the clamping end gradually increases from the connecting end to the clamping end, and the outer diameter of at least a part of the clamping end is greater than the inner diameter of the cavity.

[0010] In some technical solutions, the end of the clamping end far away from the connecting end is provided with an opening groove distributed along the circumferential direction.

[0011] In some technical solutions, a guiding post is provided on the inner end face of the concave cavity, a guiding hole is provided on the connecting end, and the connecting end is sleeved on the guiding post through the guiding hole.

[0012] In some technical solutions, the guiding hole is a stepped hole communicating with the groove. The stepped hole includes a first through hole and a second through hole. The aperture of the first through hole is smaller than that of the second through hole. The connecting end is sleeved on the guiding post through the first through hole, and the connecting end can move relative to the axial direction of the guiding post. A threaded hole is provided in the guiding post, and a limit screw is connected in the threaded hole. The head of the limit screw is located in the second through hole, and the outer diameter of the head of the limit screw is larger than the inner diameter of the first through hole.

[0013] In some technical solutions, the knurled screw disassembly and assembly tool further includes an elastic resetting member. Two ends of the elastic resetting member are respectively connected to the shaft sleeve and the elastic clamping member, and the elastic resetting member pushes the clamping end to extend out of the concave cavity under the action of its elastic force.

[0014] In some technical solutions, a plurality of connecting posts distributed along the circumferential direction are provided on the inner end face of the concave cavity, and one elastic resetting member is sleeved on each connecting post. The connecting end is provided with connecting holes corresponding to the connecting posts one by one.

[0015] In some technical solutions, the knurled screw disassembly and assembly tool further includes an intermediate bushing. The intermediate bushing is sleeved on the connecting end, and two ends of the elastic resetting member are respectively abutted against the inner end face of the concave cavity and the end face of the intermediate bushing far from the clamping end.

[0016] In some technical solutions, an annular groove is provided on the inner end face of the concave cavity, and one end of the elastic resetting member is located in the annular groove.

[0017] In some technical solutions, a knurled layer is provided on the outer peripheral surface of the shaft sleeve.

[0018] Compared with the prior art, the above technical solutions have at least the following advantages:

[0019] For a knurled screw disassembly and assembly tool provided by the present utility model, when it is necessary to disassemble and assemble a knurled screw, the elastic clamping member is sleeved and clamped on the knurled end of the knurled screw through the groove. In this process, the groove is squeezed by the inner side wall of the concave cavity to clamp the knurled end. Then, by controlling the rotation of the connecting shaft, the knurled screw can be tightened through the shaft sleeve and the elastic clamping member. By rotating the connecting shaft in the reverse direction, the knurled screw can be loosened. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on the provided drawings.

[0021] Figure 1 Schematic three-dimensional structure diagram of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0022] Figure 2 Schematic exploded structure diagram of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0023] Figure 3 Schematic front view structure diagram of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0024] Figure 4 Schematic sectional view structure diagram of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0025] Figure 5 Schematic structure diagram of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention when holding a knurled screw;

[0026] Figure 6 Schematic sectional view structure diagram of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention when holding a knurled screw;

[0027] Figure 7 Schematic structure diagram of a bushing of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0028] Figure 8 Schematic structure diagram of an intermediate bushing of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0029] Figure 9 Schematic structure diagram of an elastic clamping member of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention;

[0030] Figure 10 Schematic structure diagram of the assembled elastic clamping member and the intermediate bushing of a knurled screw disassembly and assembly tool provided by a specific embodiment of the present invention.

[0031] The reference numerals are as follows:

[0032] 10 - Bush, 101 - Knurled layer, 11 - Connecting shaft, 12 - Concave cavity, 121 - Annular groove, 13 - Guide post, 131 - Threaded hole, 14 - Connecting post;

[0033] 20 - Elastic clamping member, 21 - Connecting end, 211 - Guide hole, 2111 - First through hole, 2112 - Second through hole, 212 - Connecting hole, 22 - Clamping end, 221 - Opening groove, 23 - Groove;

[0034] 30 - Intermediate bushing, 31 - First through hole, 32 - Second through hole;

[0035] 40 - Elastic reset member;

[0036] 50 - Limit screw;

[0037] 60 - Knurled screw, 61 - Knurled end. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] Please refer to Figures 1 to 10 , a knurled screw disassembly and assembly tool provided by an embodiment of the present invention includes: a bushing 10 and an elastic clamping member 20. One end of the bushing 10 is provided with a connecting shaft 11, and the connecting shaft 11 can be connected to a power device that outputs rotational motion. For example, the connecting shaft 11 is connected to an electric screwdriver. Among them, the connecting shaft 11 is preferably a hexagonal prism structure with a regular hexagonal cross-section. The other end of the bushing 10 is provided with a concave cavity 12 for accommodating the elastic clamping member 20, and the end of the elastic clamping member 20 away from the connecting shaft 11 is provided with a groove 23. When disassembling and assembling the knurled screw 60, the elastic clamping member 20 is sleeved and clamped on the knurled end 61 of the knurled screw 60 through the groove 23. During this process, the groove 23 is squeezed by the inner side wall of the concave cavity 12 to clamp the knurled end 61, and then by controlling the rotation of the connecting shaft 11, the knurled screw 60 can be tightened through the bushing 10 and the elastic clamping member 20. By rotating the connecting shaft 11 in the reverse direction, the knurled screw 60 can be loosened.

[0040] In some embodiments, such as Figure 2 and Figure 4As shown, the elastic clamping member 20 includes a connecting end 21 and a clamping end 22. The elastic clamping member 20 can be selected as a rubber chuck. The connecting end 21 and the clamping end 22 are of an integrally formed structure. The connecting end 21 is slidably connected to the inside of the concave cavity 12 along the axial direction of the concave cavity 12. A groove 23 is provided at one end of the clamping end 22 away from the connecting end 21. The outer diameter of the outer side wall of the clamping end 22 gradually increases from the connecting end 21 to the clamping end 22. The outer diameter of at least a part of the clamping end 22 is larger than the inner diameter of the concave cavity 12. When in use, the clamping end 22 is sleeved on the knurled end 61 of the knurled screw 60, and then the sleeve 10 is moved towards the knurled screw 60. At this time, the clamping end 22 is squeezed by the inner wall of the concave cavity 12 and contracts, so as to achieve the purpose of clamping the knurled end 61. The magnitude of the clamping force is proportional to the axially applied pressure. In order to improve the disassembly and assembly operations of different knurled screws 60, the groove 23 can be designed as a stepped groove structure. When facing knurled ends 61 with different outer diameters, the corresponding size structure in the stepped groove can be selected to sleeve the knurled end 61.

[0041] In some embodiments, as Figures 2 to 4 shown, an opening groove 221 distributed along the circumferential direction is provided at the end of the clamping end 22 away from the connecting end 21. For example, a slotted groove or a cross groove can be opened at the end of the clamping end 22. Due to the opening groove 221, the clamping end 22 forms a jaw structure. For example, the provided slotted groove is equivalent to the clamping end 22 forming two jaw structures, and the provided cross groove is equivalent to the clamping end 22 forming four jaw structures. Therefore, through the opening groove 221 structure, it is convenient for the clamping end 22 to expand and contract in the radial direction.

[0042] In some embodiments, as Figure 2 、 Figure 4 、 Figure 6 and Figure 7 shown, a guiding post 13 is provided on the inner end face of the concave cavity 12, and a guiding hole 211 is provided on the connecting end 21. The connecting end 21 is sleeved on the guiding post 13 through the guiding hole 211. For example, the guiding post 13 can be provided in the middle of the inner end face of the concave cavity 12, and the guiding hole 211 can be provided in the middle of the connecting end 21. Before the clamping end 22 is sleeved on the knurled end 61, it is located outside the concave cavity 12. After the clamping end 22 is sleeved on the knurled end 61, after applying a force towards the knurled screw 60 to the sleeve 10, the sleeve 10 axially moves relative to the elastic clamping member. During this process, the sleeve 10 gradually sleeves on the outer periphery of the clamping end 22, and the clamping end 22 deforms towards the middle of the groove 23, so as to clamp the knurled end 61. Among them, through the guiding post 13 and the guiding hole 211, the stability and accuracy of the sleeve 10 moving relative to the elastic clamping member can be effectively improved.

[0043] In some embodiments, as Figure 9As shown, the guiding hole 211 is a stepped hole communicating with the groove 23. The stepped hole includes a first through hole 2111 and a second through hole 2112. The aperture of the first through hole 2111 is smaller than that of the second through hole 2112. The connecting end 21 is sleeved on the guiding column 13 through the first through hole 2111. The connecting end 21 can move relative to the axial direction of the guiding column 13. A threaded hole 131 is provided in the guiding column 13, and a limit screw 50 is connected in the threaded hole 131. The head of the limit screw 50 is located in the second through hole 2112, and the outer diameter of the head of the limit screw 50 is larger than the inner diameter of the first through hole 2111. During assembly, the connecting end 21 can be sleeved on the guiding column 13, and then the limit screw 50 is screwed into the threaded hole 131 to limit the connecting end 21 in the concave cavity 12. The moving range of the connecting end 21 relative to the guiding column 13 is within the range between the inner end face of the concave cavity 12 and the head of the limit screw 50. When the elastic clamping member 20 is worn, the limit screw 50 can be removed, and then the elastic clamping member 20 can be taken off for replacement.

[0044] In some embodiments, as Figure 4 and Figure 6 shown, the knurled screw disassembly and assembly tool further includes an elastic reset member 40. The two ends of the elastic reset member 40 are respectively connected to the bushing 10 and the elastic clamping member 20. The elastic reset member 40 is preferably a spring. The two ends of the spring are respectively connected to the inner end face of the concave cavity 12 of the bushing 10 and the inner end face of the elastic clamping member 20. Under the action of its elastic force, the elastic reset member 40 pushes the clamping end 22 to extend out of the concave cavity 12. At this time, the clamping end 22 is in an open state. During use, first, the clamping end 22 is sleeved on the knurled end 61 of the knurled screw 60, and then the bushing 10 is pushed towards the direction of the knurled screw 60. At this time, the elastic reset member 40 is compressed. After removing the pressure of the bushing 10 on the elastic clamping member 20, the elastic reset member 40 can eject the clamping end 22 of the elastic clamping member 20 from the concave cavity 12, so as to facilitate the disassembly and assembly operation of the next knurled screw 60.

[0045] In some embodiments, as Figure 7 shown, a plurality of connecting columns 14 distributed along the circumferential direction are provided on the inner end face of the concave cavity 12. For example, three connecting columns 14 evenly distributed along the circumferential direction are provided. An elastic reset member 40 is sleeved on each connecting column 14, and the connecting end 21 is provided with connecting holes 212 corresponding to the connecting columns 14 one by one. Through the connecting columns 14 and the connecting holes 212, on the one hand, it can play a role in restricting the relative rotation of the elastic clamping member 20 relative to the bushing 10, and on the other hand, it can play a guiding role in the relative movement of the elastic clamping member 20 and the bushing 10.

[0046] In some embodiments, as Figure 4 、 Figure 6 and Figure 8As shown, the knurled screw disassembly and assembly tool further includes an intermediate bushing 30. The intermediate bushing 30 is sleeved on the connecting end 21. A first through hole 31 sleeved on the guide rod is provided in the middle of the intermediate bushing 30. A plurality of second through holes 32 evenly distributed along the circumferential direction of the first through hole 31 are provided at the end of the intermediate bushing 30. The connecting rod is inserted into the second through holes 32. The position of the intermediate bushing 30 relative to the connecting end 21 is fixed. Both ends of the elastic reset member 40 are respectively abutted against the inner end surface of the concave cavity 12 and the end surface of the intermediate bushing 30 far from the clamping end 22. The intermediate bushing 30 can reduce the wear between the connecting end 21 and the concave cavity 12, thereby improving its service life.

[0047] In some embodiments, as Figure 4 shown, an annular groove 121 is provided on the inner end surface of the concave cavity 12. One end of the elastic reset member 40 is located in the annular groove 121. The annular groove 121 is coaxially arranged with the connecting column 14. The elastic reset member 40 can push the intermediate bushing 30 and the elastic reset member 40 as a whole to axially move relative to the guide column 13.

[0048] In some embodiments, as Figure 3 shown, a knurled layer 101 is provided on the outer peripheral surface of the bushing 10. The roughness of the outer peripheral surface of the bushing 10 can be increased through the knurled layer 101, which can facilitate sleeving the tool on the knurled end 61 of the knurled screw 60.

[0049] In summary, the working principle of the knurled screw disassembly and assembly tool provided by the present utility model is as follows:

[0050] First, adjust the torque of the electric screwdriver and install the connecting shaft 11 on the electric screwdriver;

[0051] Sleeve the clamping end 22 on the knurled end 61 of the knurled screw 60, and then apply pressure along the axial direction of the knurled screw 60. The elastic clamping member 20 will perform axial movement under the axial pressure.

[0052] When the outer peripheral surface of the clamping end 22 of the elastic clamping member 20 contacts the opening of the concave cavity 12 of the bushing 10, with the continuous application of the axial pressure, the clamping end 22 will be squeezed by the inner side wall of the concave cavity 12 and deformed inward, so as to achieve the purpose of clamping the knurled screw 60.

[0053] When the electric screwdriver starts to rotate, the bushing 10 will drive the knurled screw 60 to rotate together through the elastic clamping member 20, so as to achieve the tightening or disassembly of the knurled screw 60.

[0054] After the knurled screw 60 is tightened, move the clamping end 22 along its axial direction away from the knurled screw 60. At this time, under the elastic force of the elastic reset member 40, the clamping end 22 will be pushed out of the concave cavity 12, so as to realize the reset operation of the tool, facilitating the next disassembly and assembly operation of the knurled screw 60.

[0055] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0056] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.

[0057] The above has introduced in detail a knurled screw disassembly and assembly tool provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A knurled screw disassembly and assembly tool, characterized in that: include: A shaft sleeve (10) and an elastic clamping member (20), wherein one end of the shaft sleeve (10) is provided with a connecting shaft (11), and the other end of the shaft sleeve (10) is provided with a concave cavity (12) for accommodating the elastic clamping member (20), and an end of the elastic clamping member (20) away from the connecting shaft (11) is provided with a groove (23), and when the elastic clamping member (20) is clamped on the knurled end (61) of the knurled screw (60) through the groove (23), the groove (23) is squeezed by the inner side wall of the concave cavity (12) to clamp the knurled end (61).

2. The knurled screw disassembly and assembly tool according to claim 1, characterized in that: The elastic clamping member (20) comprises a connecting end (21) and a clamping end (22); the connecting end (21) is slidably connected to the concave cavity (12) along the axial direction of the concave cavity (12); the groove (23) is provided at an end of the clamping end (22) away from the connecting end (21); the outer diameter of the outer wall of the clamping end (22) gradually increases in a direction from the connecting end (21) to the clamping end (22); and the outer diameter of at least a portion of the clamping end (22) is greater than the inner diameter of the concave cavity (12).

3. The knurled screw disassembly and assembly tool according to claim 2, characterized in that: An end of the clamping end (22) away from the connecting end (21) is provided with open grooves (221) distributed along the circumferential direction.

4. The knurled screw disassembly and assembly tool according to claim 2, characterized in that: A guide column (13) is provided on the inner end surface of the concave cavity (12), a guide hole (211) is provided on the connecting end (21), and the connecting end (21) is sleeved on the guide column (13) through the guide hole (211).

5. The knurled screw disassembly and assembly tool according to claim 4, characterized in that: The guide hole (211) is a stepped hole connected to the groove (23), the stepped hole comprising a first through hole (2111) and a second through hole (2112), the aperture of the first through hole (2111) being smaller than the aperture of the second through hole (2112), the connecting end (21) being sleeved on the guide column (13) through the first through hole (2111), the connecting end (21) being movable in an axial direction relative to the guide column (13), the guide column (13) being provided with a threaded hole (131), a limiting screw (50) being connected in the threaded hole (131), the head of the limiting screw (50) being located in the second through hole (2112), the outer diameter of the head of the limiting screw (50) being larger than the inner diameter of the first through hole (2111).

6. The knurled screw disassembly and assembly tool according to claim 2, characterized in that: The knurled screw disassembly and assembly tool further comprises an elastic reset member (40), the two ends of which are respectively connected to the shaft sleeve (10) and the elastic clamping member (20), and the elastic reset member (40) pushes the clamping end (22) to extend out of the concave cavity (12) under the action of its elastic force.

7. The knurled screw disassembly and assembly tool according to claim 6, characterized in that: The inner end surface of the cavity (12) is provided with a plurality of connecting columns (14) distributed along the circumferential direction, each connecting column (14) is sleeved with an elastic reset member (40), and the connecting end (21) is provided with connecting holes (212) corresponding one to one with the connecting columns (14).

8. The knurled screw disassembly and assembly tool according to claim 7, characterized in that: The knurled screw disassembly and assembly tool further comprises an intermediate bushing (30), wherein the intermediate bushing (30) is sleeved on the connecting end (21), and the two ends of the elastic reset member (40) are respectively pressed against the inner end surface of the concave cavity (12) and the end surface of the intermediate bushing (30) away from the clamping end (22).

9. The knurled screw disassembly and assembly tool according to claim 8, characterized in that: An annular groove (121) is provided on the inner end surface of the concave cavity (12), and one end of the elastic return member (40) is located in the annular groove (121).

10. The knurled screw disassembly and assembly tool according to claim 1, characterized in that: The outer peripheral surface of the shaft sleeve (10) is provided with a knurling layer (101).

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