Automatic wrench with wide adaptability

Abstract

The invention relates to an automatic wrench with wide adaptability. The automatic wrench comprises a shell, a mounting cavity is formed in the shell, a coupling opening communicated with the mounting cavity is formed in the shell, worm wheels which are symmetrically arranged are rotationally connected to the positions, opposite to the coupling opening, of the mounting cavity, and a worm is rotationally connected into the mounting cavity; the worm and the worm wheel are meshed and can form transmission fit between the worm and the worm wheel, a mounting seat is arranged on the shell, a connecting shaft is arranged on the mounting seat, a wrench fluted disc is arranged on the outer side of the shell, a clamping groove is formed in the center of the wrench fluted disc, teeth meshed with the worm wheel are arranged on the periphery of the wrench fluted disc, a connecting shell is arranged on the periphery of the wrench fluted disc, and the wrench fluted disc can rotate in the connecting shell. The connecting shell is provided with an inlet and outlet communicated with the clamping groove and a receding opening allowing the teeth to be meshed with the worm gear, and the multiple wrench fluted discs can rotate with the connecting shaft as the rotation center so that the teeth of the wrench fluted discs can be meshed with the worm gear. The device has the following advantages and effects that the device can adapt to different types of thread sleeves, and the overall use adaptability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wrenches, and in particular to an automatic wrench with wide adaptability. Background Art

[0002] A wrench is a commonly used installation and disassembly tool. It is a hand tool that uses the principle of leverage to turn bolts, screws, nuts and other threaded fasteners such as the openings or holes of bolts or nuts. In the field of pipeline connection, after the pipelines are connected to each other, the threaded sleeves at the connection points of adjacent pipelines need to be locked to achieve a stable connection between adjacent pipelines. However, in actual use, the installation environment is often relatively narrow. At this time, when the threaded sleeve is twisted with a manual wrench, it is necessary to perform frequent intermittent small-angle rotations in the same direction, which is laborious. Therefore, an automatic wrench is needed to twist it.

[0003] In the prior art, the automatic wrench mainly includes a worm gear and a wrench toothed disc, the center of the wrench toothed disc is a slot, and the wrench toothed disc is provided with an entrance and exit for the screw sleeve to enter the slot, wherein the slot specification is slightly smaller than the screw sleeve specification, and the wrench toothed disc has toughness, so after the screw sleeve enters the slot, it can be clamped by friction. In addition, the worm gear is used as a power source, so that after the screw sleeve is clamped into the slot, the rotation of the worm can drive the wrench toothed disc engaged with the worm wheel to rotate, thereby realizing automatic twisting of the screw sleeve, avoiding the problem of repeatedly turning the wrench in small amplitudes when twisting the screw sleeve with a manual wrench.

[0004] However, in actual use, it is found that screw sleeves are often of different types, while the slot in the center of the wrench toothed disc is a single structure. Therefore, when different types of screw sleeves need to be screwed, different automatic wrenches are required, so there are certain limitations in overall adaptability. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide an automatic wrench with wide adaptability, which can adapt to different types of screw sleeves and expand the overall adaptability of use.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic wrench with wide adaptability, comprising a shell, a mounting cavity is provided in the shell, a coupling port connected to the mounting cavity is provided on the shell, a symmetrically arranged worm wheel is rotatably connected to the mounting cavity at a position opposite to the coupling port, a worm is rotatably connected in the mounting cavity, the worm is meshed with the worm wheel and can form a transmission match between the two, a mounting seat that can be lifted and lowered is provided on the shell, a connecting shaft is provided on the mounting seat, a wrench toothed disc is provided on the outer side of the shell, a clamping groove is provided in the center of the wrench toothed disc, and the clamping groove types of each wrench toothed disc are different from each other, teeth meshed with the worm wheel are provided on the outer periphery of the wrench toothed disc, a connecting shell is provided on the outer periphery of the wrench toothed disc, the wrench toothed disc can rotate in the connecting shell, an inlet and outlet connected to the clamping groove and a make way port for the teeth to mesh with the worm wheel are provided on the connecting shell, and the wrench toothed disc is multiple and can be rotated with the connecting shaft as the rotation center so that the teeth of each wrench toothed disc mesh with the worm wheel.

[0007] The present invention is further configured as follows: an end cover adapted to the cross section of the connection shell is provided on the connection shell, and a detachable connection is formed between the end cover and the connection shell.

[0008] The present invention is further configured as follows: a top guide flange and a bottom guide flange are respectively provided on the top and bottom of the wrench toothed disc, and a top guide groove and a bottom guide groove adapted to the top guide flange and the bottom guide flange are respectively provided on the end cover and the connecting shell, and the top guide flange and the bottom guide flange are respectively coupled to the top guide groove and the bottom guide groove, and respectively constitute a sliding fit with each other.

[0009] The present invention is further configured as follows: a connecting sleeve which can slide axially along the connecting shaft is mounted on the connecting shaft, a rotating sleeve which can rotate along the outer periphery of the connecting sleeve is provided on the outer periphery of the connecting sleeve, a connecting rod is provided between the rotating sleeve and the connecting shell, one end of the connecting rod is fixed to the outer periphery of the rotating sleeve, and the other end is fixed to the outer periphery of the connecting shell.

[0010] The present invention is further configured as follows: the connecting sleeve is symmetrically provided with connecting parts offset outwards, and two sides of the rotating sleeve are respectively abutted against the connecting parts on both sides.

[0011] The present invention is further configured as follows: a protruding guide block is provided on the shell, a coupling groove adapted to the guide block is provided on the connecting shell, and the coupling groove can be coupled with the guide block to form a sliding fit between the two.

[0012] The present invention is further configured as follows: a lever extending outward is provided on the surface of the wrench toothed disc.

[0013] The present invention is further configured as follows: a base is fixed on the shell, a lifting groove is provided in the base, and the mounting seat is adapted to the lifting groove and can form a sliding fit between the two.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By arranging a connecting shaft on a liftable mounting seat, and arranging a plurality of spanner toothed discs that can rotate with the connecting shaft as the rotation center, when screwing different types of screw sleeves, after the teeth of the spanner toothed disc are staggered with the worm wheel, each spanner toothed disc is driven to rotate with the connecting shaft as the rotation center, until the spanner toothed disc adapted to the screw sleeve to be screwed is rotated to a position relative to the coupling port, the teeth of the spanner toothed disc are meshed with the worm wheel again, and the spanner toothed disc can be driven to rotate after the worm rotates, so that switching between different spanner toothed discs can be achieved to adapt to different types of screw sleeves. Therefore, the technical problem that the slot structure of the wrench in the prior art is single and cannot adapt to different types of screw sleeves is effectively solved, thereby expanding the overall use adaptability. In addition, by lifting the mounting seat, when the spanner toothed disc is switched, the spanner toothed disc and the connecting shell can be kept away from the shell, so as to avoid interference of the shell with the rotation of the spanner toothed disc and the connecting shell with the connecting shaft as the rotation center, thereby ensuring the stability of the spanner toothed disc when switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the specific structure of the connecting shell in the present invention;

[0019] Figure 4 It is a schematic diagram of the specific structure of the wrench toothed disc in the present invention;

[0020] Figure 5 It is a schematic diagram of the specific structure of the connecting sleeve in the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figures 1 to 5 As shown, the present invention discloses an automatic wrench with wide adaptability, including a housing 1, a mounting cavity 101 is arranged in the housing 1, a coupling port 102 connected to the mounting cavity 101 is arranged on the housing 1, a symmetrically arranged worm wheel 2 is rotatably connected to the mounting cavity 101 at a position opposite to the coupling port 102, a worm 3 is rotatably connected in the mounting cavity 101, the worm 3 is meshed with the worm wheel 2 and can form a transmission match between the two, a mounting seat 4 that can be lifted and lowered is arranged on the housing 1, a connecting shaft 5 is arranged on the mounting seat 4, and a worm 3 is rotatably connected to the mounting cavity 101. A wrench toothed disc 6 is provided, a slot 61 is provided at the center of the wrench toothed disc 6, the slots 61 of each wrench toothed disc 6 are of different types, a tooth 64 meshing with the worm wheel 2 is provided on the outer periphery of the wrench toothed disc 6, a connecting shell 7 is provided on the outer periphery of the wrench toothed disc 6, the wrench toothed disc 6 can rotate in the connecting shell 7, an inlet and outlet 71 communicating with the slot 61 and a clearance opening 72 for the tooth 64 to mesh with the worm wheel 2 are provided on the connecting shell 7, there are multiple wrench toothed discs 6 and they can rotate with the connecting shaft 5 as the rotation center, so that the tooth 64 of each wrench toothed disc 6 meshes with the worm wheel 2;

[0024] When different types of screw sleeves are to be screwed and the spanner toothed disc 6 with the corresponding slot 61 type needs to be replaced, after the teeth 64 of the spanner toothed disc 6 are staggered with the worm wheel 2, each spanner toothed disc 6 is driven to rotate with the connecting shaft 5 as the rotation center, until the spanner toothed disc 6 adapted to the screw sleeve to be screwed is rotated to a position opposite to the coupling opening 102, the teeth 64 of the spanner toothed disc 6 is meshed with the worm wheel 2 again, and the spanner toothed disc 6 can be driven to rotate after the worm 3 rotates, so that the switching between different spanner toothed discs 6 can be realized to adapt to different types of screw sleeves, and the screw sleeves to be screwed can be screwed. The overall adaptability of use can be expanded. In addition, by lifting and lowering the mounting seat 4, when the spanner toothed disc 6 is switched, the spanner toothed disc 6 and the connecting shell 7 can be kept away from the housing 1, so as to avoid interference of the housing 1 with the rotation of the spanner toothed disc 6 and the connecting shell 7 with the connecting shaft 5 as the rotation center, thereby ensuring the stability of the spanner toothed disc 6 when it is switched. In order for the teeth 64 of the spanner toothed disc 6 to be able to stably mesh with the worm wheel 2, the tooth shape of the teeth 64 is set between the straight teeth and the helical teeth, so that the teeth 64 of the spanner toothed disc 6 can have a sufficient meshing contact surface with the worm wheel 2.

[0025] Among them, the principle of staggering the teeth 64 of the wrench toothed disc 6 and the worm wheel 2 is that a connecting sleeve 9 that can slide axially along the connecting shaft 5 is mounted on the connecting shaft 5, and a rotating sleeve 10 that can rotate along the outer periphery of the connecting sleeve 9 is provided on the outer periphery of the connecting sleeve 9. A connecting rod 11 is provided between the rotating sleeve 10 and the connecting shell 7. One end of the connecting rod 11 is fixed to the outer periphery of the rotating sleeve 10, and the other end is fixed to the outer periphery of the connecting shell 7. Each wrench toothed disc 6 is connected to the connecting sleeve 9 through the connecting shell 7 through the connecting rod 11. In this way, each wrench toothed disc 6 can be integrally arranged with the housing 1. When switching the wrench toothed disc 6, there is no need to assemble other components, and the switching operation can be directly performed to improve the convenience of switching. At the same time, by pushing the connecting sleeve 9, the connecting sleeve 9 can slide along the connecting shaft 5, so that the teeth 64 of the wrench toothed disc 6 meshing with the worm wheel 2 can be staggered with the worm wheel 2.

[0026] In this embodiment, an end cover 8 adapted to the cross-section of the connecting shell 7 is further provided on the connecting shell 7, and a detachable connection is formed between the end cover 8 and the connecting shell 7, wherein the end cover 8 and the connecting shell 7 are detachably connected through threaded holes and screws. The detachable connection formed between the end cover 8 and the connecting shell 7 can facilitate the assembly of the wrench toothed disc 6.

[0027] In this embodiment, the top and bottom of the wrench toothed disc 6 are further provided with a top guide flange 62 and a bottom guide flange 63, respectively. The end cover 8 and the connecting shell 7 are respectively provided with a top guide groove 81 and a bottom guide groove 73 adapted to the top guide flange 62 and the bottom guide flange 63. The top guide flange 62 and the bottom guide flange 63 are respectively coupled to the top guide groove 81 and the bottom guide groove 73, and respectively constitute a sliding fit with each other. After the worm 3 drives the worm wheel 2 to rotate, the wrench toothed disc 6 meshing with the worm wheel 2 through the teeth 64 can be driven to rotate in the connecting shell 7. During the rotation of the wrench toothed disc 6, the top guide flange 62 and the bottom guide flange 63 on the wrench toothed disc 6 can slide along the top guide groove 81 and the bottom guide groove 73, respectively, so that the rotation of the wrench toothed disc 6 can be guided, ensuring the stable rotation of the wrench toothed disc 6 and preventing the wrench toothed disc 6 from moving during rotation, thereby improving the stability of the screw sleeve twisting.

[0028] In this embodiment, the worm 3 is driven by a small motor 100 installed in the installation cavity 101, and a control circuit board 200 is provided in the installation cavity 101. In this way, the corresponding control program can be programmed according to actual usage requirements to realize intelligent control of the small motor 100. This is a conventional technical means in intelligent control, so it will not be elaborated here.

[0029] In this embodiment, a connecting portion 91 offset outward is further symmetrically provided on the connecting sleeve 9, and the two sides of the rotating sleeve 10 are respectively abutted against the connecting portions 91 on both sides. After the rotating sleeve 10 is sleeved on the connecting shaft 5, the two sides of the rotating sleeve 10 can abut against the connecting portions 91 on both sides. This can improve the stability of the rotating sleeve 10 when rotating on the connecting sleeve 9, and avoid shaking between the rotating sleeve 10 and the connecting sleeve 9, which affects the meshing of the worm gear 2 and the teeth 64 of the wrench gear 6.

[0030] In this embodiment, a protruding guide block 103 is further provided on the shell 1, and a coupling groove 74 adapted to the guide block 103 is provided on the connecting shell 7. The coupling groove 74 can be coupled with the guide block 103 and form a sliding fit between the two. After the wrench toothed disc 6 that needs to be switched is rotated to a position relative to the coupling port 102, the setting of the guide block 103 can play a positioning role in pushing the wrench toothed disc 6 into the coupling port 102, thereby ensuring that the teeth 64 of the wrench toothed disc 6 can be fully meshed with the worm wheel 2. After the wrench toothed disc 6 is pushed into the coupling port 102 so that the teeth 64 of the wrench toothed disc 6 are re-engaged with the worm wheel 2, the guide block 103 and the coupling groove 74 can generate friction through mutual contact, thereby improving the stability of the connecting shell 7 after being connected to the shell 1, thereby further ensuring the stability of the meshing of the teeth 64 of the wrench toothed disc 6 with the worm wheel 2.

[0031] In this embodiment, a lever 12 extending outward is further provided on the surface of the wrench toothed disc 6. When the connecting sleeve 9 is rotated to drive each wrench toothed disc 6 to rotate, the wrench toothed disc 6 is easily affected by external force and produces a certain rotation in the connecting shell 7. At this time, if the wrench toothed disc 6 is pushed back into the coupling port 102 by sliding the connecting sleeve 9, it is easy for the teeth 64 of the wrench toothed disc 6 and the worm wheel 2 to be staggered with each other, so that the teeth 64 of the wrench toothed disc 6 and the worm wheel 2 cannot be normally engaged. Therefore, the provided lever 12 can drive the wrench toothed disc 6 to rotate in the connecting shell 7 to perform certain fine-tuning on the wrench toothed disc 6, so as to facilitate the teeth 64 of the wrench toothed disc 6 pushed into the coupling port 102 to be stably engaged with the worm wheel 2.

[0032] In this embodiment, the structure for lifting the mounting seat 4 is that a base 13 is fixed on the shell 1, and a lifting groove is provided in the base 13. The mounting seat 4 is adapted to the lifting groove and can form a sliding fit between the two. If the mounting seat 4 is pulled, the mounting seat 4 can slide in the lifting groove, so that the mounting seat 4 can be lifted and lowered.

[0033] The use principle of the present invention is as follows:

[0034] When different types of screw sleeves are screwed and the spanner toothed disc 6 with the corresponding slot 61 needs to be switched, the connecting sleeve 9 is first pushed to drive the teeth 64 of the spanner toothed disc 6 to be staggered with the worm wheel 2. At this time, the mounting seat 4 can be lifted and pulled to lift the mounting seat 4, thereby driving the spanner toothed disc 6 and the connecting shell 7 to be lifted. At this time, the corresponding spanner toothed disc 6 can be rotated to the opposite position of the coupling opening 102 by driving the rotating sleeve 10 to rotate. At this time, after the mounting seat 4 is lowered, the connecting sleeve 9 can be pushed again so that the corresponding spanner toothed disc 6 can be pushed into the coupling opening 102 and re-engaged with the worm wheel 2, so that the switching between different spanner toothed discs 6 can be realized. When the screw sleeve needs to be screwed, after the screw sleeve is inserted into the slot 61 through the entrance and exit 71, the small motor 100 drives the worm 3 to rotate to drive the worm wheel 2 meshing with the worm 3 to rotate, thereby driving the spanner toothed disc 6 to rotate in the connecting shell 7, thereby realizing the automatic screwing of the screw sleeve.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An automatic wrench with wide adaptability, characterized in that: The invention comprises a shell, a mounting cavity is provided in the shell, a coupling port connected with the mounting cavity is provided on the shell, a symmetrically arranged worm wheel is rotatably connected to the mounting cavity at a position opposite to the coupling port, a worm is rotatably connected in the mounting cavity, the worm is meshed with the worm wheel and can form a transmission cooperation between the two, a mounting seat which can be lifted and lowered is provided on the shell, a connecting shaft is provided on the mounting seat, a wrench toothed disc is provided on the outer side of the shell, a clamping groove is provided in the center of the wrench toothed disc, and the clamping groove types of each wrench toothed disc are different from each other, teeth meshed with the worm wheel are provided on the outer periphery of the wrench toothed disc, a connecting shell is provided on the outer periphery of the wrench toothed disc, the wrench toothed disc can rotate in the connecting shell, an inlet and outlet connected with the clamping groove and a make way port for the teeth to mesh with the worm wheel are provided on the connecting shell, there are multiple wrench toothed discs and they can rotate with the connecting shaft as the rotation center so that the teeth of each wrench toothed disc can mesh with the worm wheel.

2. The automatic wrench with wide adaptability according to claim 1, characterized in that: The connecting shell is provided with an end cover adapted to the cross section of the connecting shell, and the end cover and the connecting shell form a detachable connection.

3. The automatic wrench with wide adaptability according to claim 2, characterized in that: The top and bottom of the wrench toothed disc are respectively provided with a top guide flange and a bottom guide flange, and the end cover and the connecting shell are respectively provided with a top guide groove and a bottom guide groove adapted to the top guide flange and the bottom guide flange, and the top guide flange and the bottom guide flange are respectively coupled to the top guide groove and the bottom guide groove, and respectively form a sliding fit with each other.

4. The automatic wrench with wide adaptability according to claim 1, characterized in that: The connecting shaft is provided with a connecting sleeve which can slide axially along the connecting shaft, the outer periphery of the connecting sleeve is provided with a rotating sleeve which can rotate along the outer periphery of the connecting sleeve, a connecting rod is provided between the rotating sleeve and the connecting shell, one end of the connecting rod is fixed to the outer periphery of the rotating sleeve, and the other end is fixed to the outer periphery of the connecting shell.

5. The automatic wrench with wide adaptability according to claim 4, characterized in that: The connecting sleeve is symmetrically provided with connecting parts offset outwards, and two sides of the rotating sleeve are respectively abutted against the connecting parts on both sides.

6. The automatic wrench with wide adaptability according to claim 1, characterized in that: The shell body is provided with a protruding guide block, and the connecting shell is provided with a coupling groove adapted to the guide block. The coupling groove can be coupled with the guide block to form a sliding fit between the two.

7. The automatic wrench with wide adaptability according to claim 3, characterized in that: A shifting rod extending outwards is provided on the surface of the wrench toothed disc.

8. The automatic wrench with wide adaptability according to claim 1, characterized in that: A base is fixed on the shell, a lifting slot is arranged in the base, and the mounting seat is adapted to the lifting slot and a sliding fit can be formed between the two.

Images