CN219311153U

CN219311153U - Multifunctional T-shaped wrench

Info

Publication number: CN219311153U
Application number: CN202320199848.6U
Authority: CN
Inventors: 刘威; 熊哲; 刘锋; 李丽娟
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2023-02-09
Filing date: 2023-02-09
Publication date: 2023-07-07
Anticipated expiration: 2033-02-09

Abstract

The utility model discloses a multifunctional T-shaped wrench which comprises a rotary handle, a rotary cylinder, a chassis, a disc, a built-in component and/or an overhanging component; the top of the rotary cylinder is connected with the rotary handle, and the bottom of the rotary cylinder is connected with the chassis; the chassis is detachable, and the center of the chassis is hollow hexagon; the disc is positioned at the bottom of the chassis and is detachable; the built-in assembly comprises a plurality of built-in clamping pieces; the overhanging component comprises a plurality of overhanging clamping pieces; the built-in clamping piece and the overhanging clamping piece can slide up and down in the rotary cylinder; the utility model solves the problem that various wrenches need to be replaced when screws with different sizes are screwed, and can screw outer hexagonal screws with different sizes and inner hexagonal screws with different sizes, thereby improving the labor efficiency and reducing the number of devices.

Description

Multifunctional T-shaped wrench

Technical Field

The utility model relates to the technical field of hardware tools, in particular to the technical field of wrenches, and particularly relates to a multifunctional T-shaped wrench.

Background

A T-wrench is a common tool used in life for screwing fasteners such as nuts, screws, etc., and generally includes a wrench head and a handle connected to the wrench head. The handle comprises a handle and a connecting part for connecting the handle and the spanner. The connecting portion is generally connected to a central portion of the handle to make the T-wrench T-shaped.

At present, the T-shaped spanner on the market has single function, and the T-shaped spanner of one type can only screw the outer hexagonal screw of one type, and the T-shaped spanner of many types needs to be changed to the hexagonal screw of many types in the face, uses comparatively trouble, and it can not screw the inner hexagonal screw moreover, has certain limitation.

In view of the above technical problems, improvements in the prior art are typically shown in chinese patent application: CN207382256U discloses an integrated socket wrench and toolbox thereof, the wrench includes first socket wrench portion, second socket wrench portion and socket wrench arm, the one end of first socket wrench portion has with nut or screw complex first bayonet socket, the one end of second socket wrench portion has with nut or screw complex second bayonet socket, the specification of first bayonet socket is different with the specification of second bayonet socket, the tip that keeps away from the second bayonet socket of second socket wrench portion slides and pegs graft in first bayonet socket, the outer peripheral face of second socket wrench portion has at least one first joint face with the inner wall circumference limit fit of second bayonet socket, second socket wrench portion can slide into in the first bayonet socket and the terminal surface at first bayonet socket place and the terminal surface at second bayonet socket place are non-coplanar, socket wrench arm installs on first socket wrench portion. The integrated socket wrench has wrench socket parts of different types and can be matched with screws or nuts of different types.

And US patent application 2003/013692 A1 discloses a socket wrench which enables tightening of screws of different diameters and gauges by providing different diameter sockets with a limiting structure.

And chinese patent application CN208147725U discloses a multi-stage type hexagonal special long bar spanner, which discloses setting up a plurality of spanner heads to integrate together in order to make things convenient for the screw of common model to fasten.

However, the above technical solutions are all that the sleeve is fastened for one kind of screw, and although the above technical solutions are directed to screws of different types, they cannot be fastened for screws of different types, so that the use of the sleeve is not widely applicable.

Based on the problems in the prior art, the utility model provides a multifunctional T-shaped wrench, which aims to solve the problem that one set of wrench is suitable for screws with different sizes, and simultaneously can solve the problem of fastening inner hexagonal screws and outer hexagonal screws.

Disclosure of Invention

The utility model aims to solve the defects existing in the prior art, and proposes: a multifunctional T-shaped wrench comprises a rotary handle, a rotary cylinder, a chassis, a disc, a built-in component and/or an overhanging component.

Optionally, the top of the rotary cylinder is connected with the rotary handle, and the bottom of the rotary cylinder is connected with the chassis; the chassis is detachable, and the center of the chassis is hollow hexagon; the disc is positioned at the bottom of the chassis and is detachable; the built-in assembly comprises a plurality of built-in clamping pieces; the overhanging component comprises a plurality of overhanging clamping pieces.

Optionally, the rotary handle can drive the rotary cylinder to rotate; the rotary cylinder is internally provided with a hollow hexagon column, and the rotary cylinder can clamp and drive the built-in component and/or the overhanging component to rotate; the bottom of the built-in assembly can be clamped with the outer hexagon screw, and the bottom of the overhanging assembly can be clamped with the inner hexagon screw.

Alternatively, the interior space of the rotating drum may ensure that all components fully enter the interior of the rotating drum; the center of the chassis is hollow hexagon and is detachable, and the disc is detachably connected to the bottom of the chassis.

Optionally, when the outer hexagonal screw needs to be screwed, a disc and a built-in component are required to be provided, and the outer hexagonal screw is in a working state; when the socket head cap screw is required to be screwed, an overhanging component is required to be equipped and is in a working state of screwing the socket head cap screw; when different working states need to be converted, whether the disc is reserved or not is selected according to the requirement, the chassis is disassembled, the assembly is replaced, the chassis is assembled, and the other working state can be achieved.

Optionally, the built-in component is used for screwing the working state of the outer hexagonal screw and comprises 8 built-in clamping pieces; the overhanging component is used for screwing the working state of the socket head cap screw and comprises 9 overhanging clamping pieces; the built-in clamping piece and the overhanging clamping piece can slide up and down in the rotary cylinder, and adjacent clamping pieces with different sizes have the same height difference and the same hollow hexagon size difference at the center.

Alternatively, the built-in clamping pieces with different sizes and the overhanging clamping pieces with different sizes are only different in height and size of the hollow hexagon at the center, so that part of the built-in clamping pieces and part of the overhanging clamping pieces can be replaced with each other.

Optionally, the built-in clamping piece and the overhanging clamping piece are arranged in a polygon shape, the upper part of which is matched with the inside of the rotary cylinder, the lower part of which is a polygon cylinder body matched with the target screw, and the edge value of the polygon is more than or equal to 3; the number of polygons of the upper part of the built-in clamping piece and the number of polygons of the lower part of the polygonal cylinder body of the built-in clamping piece are the same or different.

The utility model also provides the following technical means:

a multifunctional T-shaped wrench comprises a rotary handle, a rotary cylinder, a chassis and a disc, and is characterized by further comprising a built-in component and/or an overhanging component; the top of the rotary cylinder is connected with the rotary handle, the bottom of the rotary cylinder is detachably connected with the chassis, and the bottom of the chassis is connected with the disc; the embedded component comprises a plurality of embedded clamping pieces, and the overhanging component comprises a plurality of overhanging clamping pieces; the built-in assembly and the overhanging assembly are configured to match different types of screws, and the plurality of built-in clips and the plurality of overhanging clips are configured to match different sizes of screws.

Optionally, a disc is connected to the center of the chassis, the disc and the center of the chassis have hollow hexagonal structures, and the chassis is detachably connected to the bottom of the rotary cylinder.

Optionally, the built-in clamping piece and the overhanging clamping piece are arranged to be a regular hexagon at the upper part and a regular hexagon cylinder at the lower part.

Optionally, the built-in clamping pieces are all arranged inside the rotary cylinder, and the lower regular hexagonal cylinder bodies of the built-in clamping pieces are sleeved together to slidably fill the regular hexagonal structures at the centers of the chassis and the disc.

Optionally, the rotary handle and the rotary cylinder coaxially rotate, the interior of the rotary cylinder is provided with a hollow hexagon, and the rotary cylinder can clamp the built-in assembly or the overhanging assembly and drive the corresponding built-in assembly or the overhanging assembly to rotate.

Optionally, the bottom of the inner assembly is configured to be engaged with an outer hexagonal screw, and the bottom of the outer assembly is configured to be engaged with an inner hexagonal screw.

Optionally, the built-in assembly and/or the overhanging assembly is housed inside the rotating cylinder.

Optionally, the hollow hexagonal structure is for receiving a portion of the overhanging assembly and the inner assembly.

Optionally, built-in fastener is provided with 8, overhanging fastener is provided with 9, built-in fastener and overhanging fastener all can slide from top to bottom in the rotary cylinder inside, have the same difference in height and the same hollow hexagon size difference in center department between the adjacent fastener of different sizes.

Alternatively, differently sized inner snaps and differently sized outer snap portions may be interchanged.

Compared with the prior art, the utility model has the advantages and positive effects that:

the novel screw driver solves the problem that various wrenches need to be replaced when screws with different sizes are screwed; the novel multifunctional T-shaped wrench can be used for screwing outer hexagon screws with different sizes and inner hexagon screws with different sizes; and the device is convenient to replace different components and has good usability.

Drawings

Fig. 1 is a schematic structural diagram of a T-wrench according to embodiment 1 of the present utility model in a working state of driving an socket head cap screw;

FIG. 2 is a schematic structural view of the T-wrench in the working state of the outer hexagonal screw tightening according to the embodiment 2 of the present utility model;

FIG. 3 is a sectional view showing a T-wrench in a working state of driving a socket head cap screw according to embodiment 1 of the present utility model;

FIG. 4 is a cross-sectional view showing the structure of the T-wrench in the working state of the male hexagonal screw according to the embodiment 2 of the present utility model;

FIG. 5 is a front three-dimensional schematic view of a built-in module according to embodiment 1 of the present utility model;

FIG. 6 is a front three-dimensional schematic view of an overhanging assembly according to embodiment 2 of the utility model.

Legend description:

1. the rotary handle, 2, rotary drum, 3, chassis, 4, disk, 5, built-in assembly, 51, built-in

cards

1, 52, built-in

cards

2, 53, built-in

cards

3, 54, built-in

cards

4, 55, built-in

cards

5, 56, built-in

cards

6, 57, built-in cards 7, 58, built-in cards 8,6, overhanging assembly, 61,

overhanging cards

1, 62,

overhanging cards

2, 63,

overhanging cards

3, 64,

overhanging cards

4, 65,

overhanging cards

5, 66,

overhanging cards

6, 67, overhanging cards 7, 68, overhanging cards 8, 69, overhanging cards 9.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

Example 1

Referring to fig. 1,3 and 5, the present utility model provides a technical solution: the main structure of embodiment 1 of the present utility model mainly includes: the rotary handle 1, the rotary cylinder 2, the chassis 3, the disc 4 and the built-in component 5; the top of the rotary cylinder 2 is connected with the rotary handle 1, the bottom of the rotary cylinder 2 is detachably connected with the chassis 3, and the bottom of the chassis 3 is connected with the disc 4; the built-in assembly 5 comprises a plurality of built-in clamping pieces.

The center of the chassis 3 is connected with a disc 4, the centers of the disc 5 and the chassis 3 are provided with hollow hexagonal structures, and the chassis 3 is detachably connected to the bottom of the rotary cylinder 2.

The built-in clamping piece 5 is arranged to be a regular hexagon at the upper part and a regular hexagon cylinder at the lower part.

The built-in clamping pieces 5 are arranged inside the rotary cylinder, and the regular hexagonal cylinder bodies at the lower parts of the built-in clamping pieces 5 are sleeved together to slidably fill the regular hexagonal structures at the centers of the chassis 3 and the disc 4.

The rotary handle 1 and the rotary cylinder 2 coaxially rotate, the inside of the rotary cylinder 2 is provided with a hollow hexagon, and the rotary cylinder 2 can clamp the built-in component 5 and drive the built-in component 5 to rotate.

The bottom of the built-in component 5 is configured to be clamped with an outer hexagonal screw.

The built-in assembly 5 is accommodated inside the rotary cylinder 2.

The hollow hexagonal structure is configured to receive a portion of the inner assembly and the outer assembly.

The number of the built-in clamping pieces 5 is 8, the built-in clamping pieces slide up and down in the rotary cylinder 2, and adjacent clamping pieces with different sizes have the same height difference and the same hollow hexagon size difference at the center.

When the outer hexagonal screw with the diameter of 24mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, part of the built-in assembly 5 is screwed up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the disc, and the screw can be screwed by rotating the rotating handle.

When the outer hexagonal screw with the diameter of 22mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the original position of the built-in clamping piece 1 is kept unchanged, the built-in clamping pieces 2-8 are jacked up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 1, and the screw can be screwed by rotating the rotating handle.

When the outer hexagonal screw with the diameter of 20mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the original position of the built-in clamping piece 1-2 is kept unchanged, the built-in clamping piece 3-8 is lifted up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 2, and at the moment, the rotating handle is rotated to screw the screw.

When the outer hexagonal screw with the diameter of 18mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the original position of the built-in clamping piece 1-2 is kept unchanged, the built-in clamping piece 4-8 is jacked up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 2, and at the moment, the rotating handle is rotated to screw the screw.

When the outer hexagonal screw with the diameter of 16mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the original position of the built-in clamping piece 1-4 is kept unchanged, the built-in clamping piece 5-8 is jacked up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 4, and at the moment, the rotating handle is rotated to screw the screw.

When the outer hexagonal screw with the diameter of 14mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the original position of the built-in clamping piece 1-5 is kept unchanged, the built-in clamping piece 6-8 is jacked up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 5, and at the moment, the rotating handle is rotated to screw the screw.

When the outer hexagonal screw with the diameter of 12mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the original position of the built-in clamping piece 1-6 is kept unchanged, the built-in clamping piece 7-8 is jacked up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 6, and the screw can be screwed by rotating the rotating handle.

When the outer hexagonal screw with the diameter of 10mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the built-in clamping pieces 1-7 keep unchanged in original positions, the built-in clamping piece 8 is jacked up by the outer hexagonal screw, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 7, and at the moment, the rotating handle is rotated to screw the screw.

When the outer hexagonal screw with the diameter of 8mm is screwed, the wrench is in a working state of screwing the outer hexagonal screw, the built-in assembly keeps unchanged in original position, namely, the outer hexagonal screw is clamped inside the built-in clamping piece 8, and the screw can be screwed by rotating the rotating handle.

Example 2

Referring to fig. 2, 4 and 6, it can be seen that embodiment 2 of the present utility model mainly includes: a multifunctional T-shaped wrench comprises a rotary handle 1, a rotary cylinder 2, a chassis 3 and an overhanging component 6; the top of the rotary cylinder 2 is connected with the rotary handle 1, the bottom of the rotary cylinder 2 is detachably connected with the chassis 3, the center of the bottom of the chassis 3 is provided with a hollow hexagonal structure, and the chassis 3 is detachably connected with the bottom of the rotary cylinder 2. The overhanging components 6 are all arranged inside the rotary cylinder 2, and the lower parts of the overhanging clamping pieces are of regular hexagon cylinders which are sleeved together and can be filled in the regular hexagon structure of the chassis in a sliding manner.

The overhanging component 6 comprises a plurality of overhanging clamping pieces, wherein the overhanging clamping pieces are arranged to form a regular hexagon at the upper part and a regular hexagon cylinder at the lower part; the hexagonal cylinder bodies are sleeved together equidistantly, and the smaller the diameter of the hexagonal cylinder body is, the longer the length of the hexagonal cylinder body is; the hexagonal cylinder with the smallest diameter is arranged at the most central position, the hexagonal cylinder with the largest diameter is arranged at the most edge position and is abutted with the hollow hexagon of the chassis 3, and the hexagonal cylinders are in sliding sleeve joint.

The rotary handle 1 and the rotary cylinder 2 coaxially rotate, the inside of the rotary cylinder 2 is provided with a hollow hexagon, and the rotary cylinder 2 can clamp the overhanging components 6 and drive the corresponding overhanging components 6 to rotate.

The bottom of the overhanging component 6 is configured to be clamped with a socket head cap screw.

The overhanging assembly 6 is housed inside the rotating cylinder 2.

The hollow hexagonal structure of the chassis 3 is adapted to receive a portion of the overhanging assembly 6.

The number of the outward extending clamping pieces is 9, and the outward extending clamping pieces can slide up and down in the rotary cylinder 2.

A compression spring (not shown) may also be provided inside the rotary cylinder 2 for compressing the overhanging clamp.

When the socket head cap screw with the diameter of 24mm is screwed, the wrench is in a working state of screwing the socket head cap screw, the overhanging clamping piece 1 keeps unchanged in original position, the overhanging clamping pieces 2-9 are lifted up by the socket head cap screw, namely the socket head cap screw clamps the overhanging clamping piece 1, and at the moment, the screw can be screwed by rotating the rotating handle.

When the inner hexagon screw with the diameter of 22mm is screwed, the wrench is in a working state of screwing the inner hexagon screw, the outer extending clamping piece 1-2 keeps unchanged in original position, the outer extending clamping piece 3-9 is lifted up by the inner hexagon screw, namely the inner hexagon screw clamps the outer extending clamping piece 2, and at the moment, the rotating handle is rotated to screw the screw.

When the socket head cap screws with the diameter of 20mm are screwed, the wrench is in a working state of screwing the socket head cap screws, the overhanging clamping pieces 1-3 keep unchanged in original positions, the overhanging clamping pieces 4-9 are lifted up by the socket head cap screws, namely the socket head cap screws clamp the overhanging clamping pieces 3, and at the moment, the rotating handle is turned to screw the screws.

When the inner hexagon screw with the diameter of 18mm is screwed, the wrench is in a working state of screwing the inner hexagon screw, the outer extending clamping piece 1-4 keeps unchanged in original position, the outer extending clamping piece 5-9 is lifted up by the inner hexagon screw, namely the inner hexagon screw clamps the outer extending clamping piece 4, and at the moment, the rotating handle is rotated to screw the screw.

When the inner hexagon screw with the diameter of 16mm is screwed, the wrench is in a working state of screwing the inner hexagon screw, the outer extending clamping piece 1-5 keeps unchanged in original position, the outer extending clamping piece 6-9 is lifted up by the inner hexagon screw, namely the inner hexagon screw clamps the outer extending clamping piece 5, and at the moment, the rotating handle is rotated to screw the screw.

When the socket head cap screw with the diameter of 14mm is screwed, the wrench is in a working state of screwing the socket head cap screw, the overhanging clamping piece 1-6 keeps unchanged in original position, the overhanging clamping piece 7-9 is lifted up by the socket head cap screw, namely the socket head cap screw clamps the overhanging clamping piece 6, and at the moment, the screw can be screwed by rotating the rotating handle.

When the socket head cap screws with the diameter of 12mm are screwed, the wrench is in a working state of screwing the socket head cap screws, the overhanging clamping pieces 1-7 keep unchanged in original positions, the overhanging clamping pieces 8-9 are lifted up by the socket head cap screws, namely the socket head cap screws clamp the overhanging clamping pieces 7, and at the moment, the screws can be screwed by rotating the rotating handles.

When the socket head cap screws with the diameter of 10mm are screwed, the wrench is in a working state of screwing the socket head cap screws, the overhanging clamping pieces 1-8 keep unchanged in original positions, the overhanging clamping pieces 9 are lifted up by the socket head cap screws, namely the socket head cap screws clamp the overhanging clamping pieces 8, and at the moment, the screws can be screwed by rotating the rotating handles.

When the inner hexagon screw with the diameter of 8mm is screwed, the wrench is in a working state of screwing the inner hexagon screw, the overhanging component keeps unchanged in original position, namely the inner hexagon screw clamps the overhanging clamping piece 9, and the screw can be screwed by rotating the rotating handle.

Example 3

The difference from embodiment 1 is that the shape of the lower sleeve of the built-in clip is adjusted according to the shape of the screw. (illustration is not shown)

Example 4

The difference from embodiment 2 is that the shape of the lower sleeve of the cantilever clip is adjusted according to the shape of the screw. (illustration is not shown)

Example 5

The difference from

embodiments

1 and 2 is that the size and number of the built-in or protruding clips are adjusted to match different screws. (illustration is not shown)

In the present application, unless explicitly specified and limited otherwise, the terms "top-down," "connected," "twisted," "jammed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, or may be a removable connection or an integral body; the mechanical connection can be realized, and the electric welding connection can be realized; either directly or through intermediaries, may be internal communication between two elements or interaction relationship between two elements, unless explicitly defined otherwise, and the specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. A multifunctional T-shaped wrench comprises a rotary handle, a rotary cylinder, a chassis and a disc, and is characterized by further comprising a built-in component and/or an overhanging component;

the top of the rotary cylinder is connected with the rotary handle, and the bottom of the rotary cylinder is detachably connected with the chassis;

the embedded component comprises a plurality of embedded clamping pieces, and the overhanging component comprises a plurality of overhanging clamping pieces;

the built-in assembly and the overhanging assembly are configured to match different types of screws, and the plurality of built-in clips and the plurality of overhanging clips are configured to match different sizes of screws.

2. The multi-purpose T-wrench of claim 1, wherein: the center of the chassis is connected with a disc, the centers of the disc and the chassis are respectively provided with a hollow hexagonal structure, and the hollow hexagonal structures are used for accommodating a part of the built-in assembly and/or the overhanging assembly; the chassis is detachably connected to the bottom of the rotary cylinder.

3. The multi-purpose T-wrench of claim 1, wherein: the built-in clamping piece and the overhanging clamping piece are arranged in a way that the upper part is a regular hexagon, and the lower part is a regular hexagon cylinder.

4. The multi-purpose T-wrench of claim 1, wherein: the built-in clamping pieces are arranged inside the rotary cylinder, and the lower regular hexagonal cylinder bodies of the built-in clamping pieces are sleeved together to slidably fill the regular hexagonal structures at the centers of the chassis and the disc.

5. The multi-purpose T-wrench of claim 1, wherein: the rotary handle and the rotary cylinder coaxially rotate, the inside of the rotary cylinder is provided with a hollow hexagon cylinder, and the rotary cylinder clamps the built-in component or the overhanging component and drives the corresponding built-in component or the overhanging component to rotate.

6. The multi-purpose T-wrench of claim 1, wherein: the bottom of the built-in component is configured to be clamped with an outer hexagon screw, and the bottom of the overhanging component is configured to be clamped with an inner hexagon screw.

7. The multi-purpose T-wrench of claim 1, wherein: the inner assembly and/or the outer assembly is contained within the rotating barrel.

8. The multi-purpose T-wrench of claim 1, wherein: the rotary drum is internally provided with a spring, one end of the spring is abutted against the upper part of the rotary drum, and the other end is abutted against the built-in assembly or the overhanging assembly.

9. The multi-purpose T-wrench of claim 1, wherein: the embedded clamping pieces are 8, the outward-extending clamping pieces are 9, the embedded clamping pieces and the outward-extending clamping pieces can slide up and down in the rotary cylinder, and adjacent clamping pieces with different sizes have the same height difference and the same hollow hexagon size difference at the center.

10. The multi-purpose T-wrench of claim 1, wherein: the built-in clamping piece and the overhanging clamping piece are arranged in a polygonal shape, the upper part of the polygonal shape is matched with the inside of the rotary cylinder, the lower part of the polygonal shape is a polygonal cylinder body matched with the target screw, and the edge value of the polygonal shape is more than or equal to 3; the number of polygons of the upper part of the built-in clamping piece and the number of polygons of the lower part of the polygonal cylinder body of the built-in clamping piece are the same or different.