Adjustable locking head

Abstract

The utility model discloses an adjustable locking head which comprises a plurality of hexagonal heads which are sequentially nested, the front end of each hexagonal head is in a regular hexagon shape, the size of each hexagonal head corresponds to the size of internal hexagonal wrenches of different models, and cylinders which are sequentially nested are integrally arranged at the rear end of each hexagonal head. The electric screwdriver further comprises a plurality of shifting blocks, an electric screwdriver driver and a shell, an annular protrusion is arranged on the cylinder of each hexagonal head, one side of each annular protrusion extends outwards to the outside of the shell and forms an extension end, the shifting blocks are fixedly installed at the extension ends of the annular protrusions, and the shifting blocks are fixedly installed on the outer side of the shell. The left side of the shell is connected with the electric screwdriver driver, the left end of the shell is a hollow inner hexagon, the right end of the electric screwdriver driver is a protruding outer hexagon, and the outer hexagon and the inner hexagon are matched with each other and combined into a whole in an inserted mode. According to the adjustable locking head and the electric screwdriver thereof, switching of different models can be conveniently and rapidly completed, tightening of different screws can be completed conveniently, the flexibility of the electric screwdriver is improved, procedures can be reduced, and the cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of screw locking, in particular to an adjustable locking head and an electric screwdriver thereof which are suitable for manually performing a locking action. Background Art

[0002] Electric screwdrivers are important semi-automatic production equipment on industrial production lines and are widely used in electronics, home appliances, automobiles, furniture and other industrial production fields. Electric screwdrivers are similar to electric screwdrivers. On semi-automatic production lines, operators hold electric screwdrivers to tighten screws.

[0003] However, the existing electric screwdrivers are of a single model, that is, one electric screwdriver can only tighten one type of screw. Usually, the product contains many types of screws. The flexibility of a single electric screwdriver is poor, and it is inconvenient to replace the locking head, which affects production efficiency. If the locking head is not replaced, additional processes and personnel are required, which is costly. Utility Model Content

[0004] In response to the above problems, the utility model provides an adjustable locking head. The locking head of the electric screwdriver can easily and quickly complete the switching of different models, is convenient for tightening different screws, improves the flexibility of the electric screwdriver, can reduce the working procedures, and effectively reduce costs.

[0005] The utility model adopts the following technical solutions:

[0006] An adjustable locking head, comprising a plurality of hexagonal heads nested in sequence from the inside to the outside, and adjacent hexagonal heads are slidably connected, the front end of each hexagonal head is a regular hexagon and the size corresponds to the size of different types of hexagonal wrenches, the rear end of each hexagonal head is integrally provided with a cylinder nested in sequence, and also comprises a plurality of toggle blocks, an electric screwdriver driver and a housing;

[0007] Each of the hexagonal heads is movably placed in the housing, and an annular protrusion is provided on the cylindrical body of each of the hexagonal heads, and one side of each of the annular protrusions extends outward to the outside of the housing and forms an extension end, and a plurality of the toggle blocks correspond to each of the annular protrusions, and the toggle blocks are fixedly mounted on the extension end of the annular protrusion;

[0008] The left side of the shell is connected to the electric screwdriver, the left end of the shell is an inner hexagon with a hollow interior, and the right end of the electric screwdriver is a protruding outer hexagon, and the outer hexagon and the inner hexagon match each other and are plugged together to form a whole;

[0009] The shell includes an intermediate support body, a lower shell and an upper shell. The inner side of the right end portion of the intermediate support body is a hollow regular hexagon and is slidably connected to the hexagonal head of the largest size. The inner side of the left end portion of the intermediate support body is a hollow regular hexagon and is plugged and fixed to the outer hexagon of the electric screwdriver driver. The lower part of the intermediate support body is threadedly fixedly connected to the lower shell, and the upper part of the intermediate support body is threadedly fixedly connected to the upper shell.

[0010] Preferably, the toggle block is a T-shaped structure, and a fixing groove is provided in the middle portion of the T-shaped structure, and the extension end is inserted into the fixing groove to fix the toggle block.

[0011] Preferably, a plurality of positioning holes are provided on the upper surface of the upper shell body at positions corresponding to the toggle blocks, a compression spring is installed in the positioning hole, a positioning ball is installed on the upper end of the compression spring, and two front and rear positioning grooves are provided on the toggle block on the side facing the upper shell body surface, and the size of the positioning groove matches the positioning ball.

[0012] Preferably, the lower diameter of the positioning hole is larger than the upper diameter, and the diameter of the positioning ball is smaller than the lower diameter of the positioning hole and larger than the upper diameter of the positioning hole.

[0013] Preferably, a permanent magnet is fixedly mounted inside the inner hexagon at the left end of the shell, and the protruding outer hexagon at the right end of the electric screwdriver is made of ferromagnetic material.

[0014] Compared with the prior art, the beneficial effect of the utility model is that when a certain type of internal and external hexagonal wrench is needed, the front end of the hexagonal head of different sizes is extended or retracted by moving different toggle blocks to form the required internal and external hexagonal wrench, which can flexibly complete the switching of different types of wrenches and is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is an overall structural schematic diagram of an adjustable locking head and an electric screwdriver thereof according to an embodiment of the utility model.

[0016] Figure 2 For Figure 1 Schematic diagram of the exploded structure of the corresponding adjustable locking head and its electric screwdriver.

[0017] Figure 3 For Figure 1 Schematic diagram of the cross-sectional structure of the corresponding adjustable locking head and its electric screwdriver.

[0018] Figure 4 For Figure 1 Schematic diagram of the structure of the corresponding fourth hexagonal head.

[0019] Figure 5 For Figure 1 Schematic diagram of the structure of the corresponding toggle block.

[0020] Figure 6 For Figure 1 A structural diagram of the corresponding toggle block positioning state.

[0021] Figure 7 For Figure 1 Schematic diagram of the structure of the corresponding positioning hole, compression spring and positioning ball.

[0022] Description of reference numerals:

[0023] First hexagon: 1 Second hexagon: 2 Third hexagon: 3

[0024] Fourth hexagon head: 4 Toggle block: 5 Electric screwdriver: 6

[0025] Permanent magnet: 7 Housing: 8 Lever block positioning device: 9

[0026] Extension end: 11

[0027] Regular hexagon: 41 Cylinder: 42 Through hole: 43

[0028] Fixed groove: 51 Positioning groove: 52

[0029] Middle support body: 81 Lower shell: 82 Upper shell: 83

[0030] Positioning hole: 91 Compression spring: 92 Positioning ball: 93 DETAILED DESCRIPTION

[0031] The utility model patent is further described below in conjunction with the accompanying drawings.

[0032] The principle of the adjustable locking head and the electric screwdriver of the utility model is as follows Figure 1 , 2 As shown, the adjustable locking head and the electric screwdriver thereof include a plurality of hexagonal heads nested in sequence from the inside to the outside, namely a first hexagonal head 1, a second hexagonal head 2, a third hexagonal head 3 and a fourth hexagonal head 4. Among them, in order to ensure structural strength, the innermost first hexagonal head 1 is a solid structure.

[0033] Two adjacent hexagonal heads are connected by sliding connection, that is, the hexagonal heads can move forward and backward relative to each other. The front end of each hexagonal head is a regular hexagon and the size corresponds to the size of different types of hexagonal wrenches, for example Figure 4 As shown, the front end regular hexagon 41 of the fourth hexagon head corresponds to the external hexagon head screw of size 14M. The remaining first hexagon head 1, second hexagon head 2, and third hexagon head 3 correspond to the external hexagon head screws of sizes 5M, 8M, and 10M, respectively.

[0034] The rear end of each hexagonal head is integrally provided with a cylinder which is nested in sequence, such as Figure 4 As shown, a cylinder 42 is integrally provided at the rear end of the fourth hexagonal head, and a hollow through hole 43 is provided inside the cylinder 42. The through hole 43 is used for nesting and installing the cylinder of the third hexagonal head 3.

[0035] like Figure 1-3 The adjustable locking head and the electric screwdriver thereof shown in the figure further include four toggle blocks 5, an electric screwdriver driver 6 and a housing 8. Each hexagonal head is movably placed in the housing 8. Figure 4 As shown, each hexagonal head cylinder is provided with an annular protrusion, one side of each annular protrusion extends outward to the outside of the housing 8 and forms an extension end 11, each toggle block 5 corresponds to each annular protrusion, and as shown Figure 3 As shown, the toggle block 5 is fixedly mounted on the extension end 11 by a tight fit. When the toggle block 5 is moved by hand, the toggle block 5 drives the extension end 11 to move together, thereby driving the front end of the hexagonal head to extend or retract, thereby forming an external hexagonal wrench or an internal hexagonal wrench.

[0036] The left side of the housing 8 is connected to the electric screwdriver 6, which is an existing product. The main component of the electric screwdriver 6 is a driving motor for driving the locking head to rotate. The housing 8 includes an intermediate support body 81, a lower housing 82 and an upper housing 83. The lower part of the intermediate support body 81 is fixedly connected to the lower housing 82 by screw threads, and the upper part of the intermediate support body 81 is fixedly connected to the upper housing 83 by screw threads.

[0037] like Figure 2 , 3 As shown, the inner side of the right end of the intermediate support body 81 is a hollow regular hexagon and is slidably connected to the fourth hexagonal head 4 of the largest size. The inner side of the left end of the intermediate support body 81 is also a hollow regular hexagon. The right end of the electric screwdriver driver 6 is a protruding outer hexagon. The outer hexagon of the electric screwdriver driver 6 matches the inner hexagon of the intermediate support body 81 and is plugged and assembled into one. In order to facilitate disassembly and assembly, a permanent magnet 7 is fixedly installed in the inner hexagon at the left end of the housing 8, that is, in the regular hexagon inside the left end of the intermediate support body 81. The protruding outer hexagon at the right end of the electric screwdriver driver 6 is made of ferromagnetic material. When the right end of the electric screwdriver driver 6 is inserted into the left end of the intermediate support body 81, the permanent magnet 7 can fix the adjustable locking head and the electric screwdriver driver 6 by magnetic attraction to form an electric screwdriver with a stable structure.

[0038] In addition, if Figure 3 , 5 As shown, the toggle block 5 is a T-shaped structure, and a fixing groove 51 is opened in the middle of the T-shaped structure, and the extension end 11 is inserted into the fixing groove 51 to fix the toggle block 5 .

[0039] like Figure 6 , 7 As shown, the upper surface of the upper shell 83 and the position corresponding to each toggle block 5 are provided with a lever block positioning device 9, and the lever block positioning device 9 includes a plurality of positioning holes 91 opened on the upper shell 83. In this embodiment, each toggle block 5 corresponds to two front and rear lever block positioning devices 9, and a total of 8 positioning holes 91 are opened on the upper surface of the upper shell 83. A compression spring 92 is installed in the positioning hole 91, and the lower end of the compression spring 92 abuts against the bottom of the positioning hole 91, and a positioning ball 93 is installed on the upper end. The toggle block 5 is provided with two front and rear positioning grooves 52 on one side facing the surface of the upper shell 83, and the size of the positioning groove 52 matches the positioning ball 93. When the toggle block moves to the set position, the upper part of the positioning ball 93 is stuck in the positioning groove 52 to fix the toggle block 5.

[0040] In addition, in order to ensure that the positioning ball 93 can move up and down in the positioning hole 91 and does not fall out of the positioning hole 91, Figure 7 As shown, the lower diameter of the positioning hole 91 is larger than the upper diameter, and the diameter of the positioning ball 93 is smaller than the lower diameter of the positioning hole 91 and larger than the upper diameter of the positioning hole 91 .

[0041] The working principle of the adjustable locking head and its electric screwdriver is that when a certain type of hexagonal wrench is needed, for example, when an M8 type wrench is needed, the toggle blocks 5 corresponding to the first hexagonal head 1 and the second hexagonal head 2 are moved forward to the front lever block positioning device 9, and the right front ends of the first hexagonal head 1 and the second hexagonal head 2 are extended to form the required M8 type hexagonal wrench. By analogy, when other types of wrenches are needed, different types of hexagonal wrenches can be obtained by moving different toggle blocks 5 to make the right front ends of different hexagonal heads extend. On the contrary, when a certain type of external hexagonal wrench is needed, the toggle blocks 5 corresponding to each hexagonal head are moved backward to the rear lever block positioning device 9, so as to obtain different types of external hexagonal wrenches.

[0042] Compared with the prior art, the adjustable locking head and the electric screwdriver thereof have the following advantages: when a certain type of internal and external hexagonal wrench is needed, the front ends of hexagonal heads of different sizes are extended or retracted by moving different toggle blocks 5 to form the required internal and external hexagonal wrenches, and different types of wrenches can be switched flexibly, with simple and convenient operation.

[0043] The above are only preferred specific implementation methods of the utility model patent, but the protection scope of the utility model patent is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model patent, according to the technical solution of the utility model patent and its utility model patent concept, shall be covered by the protection scope of the utility model patent.

Claims

1. An adjustable locking head, comprising a plurality of hexagonal heads nested in sequence from the inside to the outside, and adjacent hexagonal heads are slidably connected, the front end of each hexagonal head is a regular hexagon and the size corresponds to the size of different types of hexagonal wrenches, and the rear end of each hexagonal head is integrally provided with a cylinder nested in sequence, characterized in that: The invention also includes a plurality of toggle blocks, an electric screwdriver driver and a shell; each of the hexagonal heads is movably placed in the shell, and an annular protrusion is arranged on the cylinder of each of the hexagonal heads, and one side of each of the annular protrusions extends outward to the outside of the shell and forms an extension end, and a plurality of toggle blocks correspond to each of the annular protrusions, and the toggle blocks are fixedly installed on the extension end of the annular protrusion; the left side of the shell is connected to the electric screwdriver driver, the left end of the shell is an inner hexagon with a hollow interior, and the right end of the electric screwdriver driver is a convex The outer hexagon is matched with the inner hexagon and plugged into an integral body; the shell comprises an intermediate support body, a lower shell and an upper shell, the inner side of the right end portion of the intermediate support body is a hollow regular hexagon and is slidably connected to the hexagonal head of the largest size, the inner side of the left end portion of the intermediate support body is a hollow regular hexagon and is plugged and fixed to the outer hexagon of the electric screwdriver driver, the lower part of the intermediate support body is threadedly fixedly connected to the lower shell, and the upper part of the intermediate support body is threadedly fixedly connected to the upper shell.

2. The adjustable locking head according to claim 1, characterized in that: The toggle block is a T-shaped structure, and a fixing groove is provided in the middle of the T-shaped structure, and the extension end is inserted into the fixing groove to fix the toggle block.

3. An adjustable locking head according to claim 2, characterized in that: A plurality of positioning holes are provided on the upper surface of the upper shell body at positions corresponding to the toggle blocks, a compression spring is installed in the positioning hole, a positioning ball is installed on the upper end of the compression spring, and two front and rear positioning grooves are provided on the toggle block on the side facing the upper shell body surface, and the size of the positioning groove matches the positioning ball.

4. The adjustable locking head according to claim 3, characterized in that: The lower diameter of the positioning hole is larger than the upper diameter, and the diameter of the positioning ball is smaller than the lower diameter of the positioning hole and larger than the upper diameter of the positioning hole.

5. An adjustable locking head according to any one of claims 1 to 4, characterized in that: A permanent magnet is fixedly installed in the inner hexagon at the left end of the shell, and the protruding outer hexagon at the right end of the electric screwdriver is made of ferromagnetic material.

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