Combined internal hexagonal wrench

Abstract

The utility model discloses a combined internal hexagonal wrench, which belongs to the technical field of tools and comprises a double-thread screw, a shell, a first wrench and a second wrench, the shell, the first wrench and the second wrench are sequentially sleeved from outside to inside, the first wrench is slidably connected with the shell, and the second wrench is slidably connected with the first wrench; a limiting cavity, an adjusting cavity and a first sliding cavity are sequentially arranged in the shell from top to bottom. The double-thread screw penetrates through the limiting cavity to be connected with the first wrench and the second wrench, the first thread part is in threaded connection with the first screw hole, and threads of the second screw hole are located at the position of the second middle part. The shell, the first wrench and the second wrench can be used as inner hexagons respectively, and the first wrench and the second wrench can extend out step by step only by rotating the double-thread screw; meanwhile, only a small section of internal threads are arranged on the inner sides of the first wrench and the second wrench, so that the machining cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of tools, and particularly relates to a combined internal hexagonal wrench. Background Art

[0002] Existing internal hexagonal wrenches are all individual hexagonal prisms. Due to their small size, large number of models, and each model can only operate on bolts of one specification, in practical applications, it is not easy to access and store so many internal hexagonal wrenches. Moreover, workers must frequently replace the corresponding internal hexagonal wrenches to complete the operation of different bolts.

[0003] A Chinese patent authorized with the publication number CN104385199B discloses a new type of hexagonal wrench. The external hexagonal wrench device in the solution includes a plurality of external hexagonal wrenches of different models. Except for the smallest external hexagonal wrench, internal threads are provided inside the cylindrical through-hole sections of the remaining external hexagonal wrenches. Except for the largest external hexagonal wrench, external threads are provided on the circular column surfaces of the remaining external hexagonal wrenches. The above technical solution drives each type of internal hexagonal wrench to extend out in turn by rotating the smallest internal hexagonal wrench.

[0004] The above technical solution realizes the combination of multi-specification internal hexagonal wrenches, which is convenient for access and storage. However, the above technical solution requires internal and external threads to be separately provided for multiple internal hexagonal wrenches, increasing the cost and being unfavorable for use and maintenance. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a combined internal hexagonal wrench to solve the problems existing in the background art.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] A combined internal hexagonal wrench includes a double-threaded screw rod, a housing, a first wrench, and a second wrench. The housing, the first wrench, and the second wrench are sleeved in sequence from outside to inside. The first wrench is slidably connected to the housing, and the second wrench is slidably connected to the first wrench;

[0008] The housing sequentially includes a limiting cavity, an adjusting cavity, and a first sliding cavity from top to bottom; the first wrench includes a limiting cap and a main body. A first screw hole is provided in the middle of the limiting cap, a second sliding cavity is provided inside the main body, a through hole is provided in the middle of the second wrench, and a second screw hole is provided at one end of the through hole;

[0009] The double-threaded screw rod includes a first thread portion, an intermediate portion, and a second thread portion. The intermediate portion is located at the position of the adjustment cavity, and the second thread portion is located at the position of the first sliding cavity. The pitch diameter of the first thread portion is greater than that of the second thread portion. The double-threaded screw rod passes through the limiting cavity and is respectively connected to the first wrench and the second wrench. The first thread portion is threadedly connected to the first screw hole, and the second screw hole is located at the position of the intermediate portion.

[0010] Further, a handle is provided at one end of the double-threaded screw rod close to the first thread portion. A ratchet washer is provided between the handle and the first thread portion, and a holding force spring is provided between the handle and the ratchet washer.

[0011] Further, a ratchet groove is provided at one end of the housing close to the limiting cavity. The diameter of the ratchet groove is greater than the inner diameter of the limiting cavity, and the ratchet groove is matched with the ratchet washer.

[0012] Further, the inner diameter of the adjustment cavity is greater than that of the first sliding cavity, the inner diameter of the first sliding cavity is greater than that of the second sliding cavity, the inner diameter of the limiting cavity is greater than the major diameter of the first thread portion, the outer diameter of the limiting cap is adapted to the inner diameter of the adjustment cavity, and the outer diameter of the main body is adapted to the inner diameter of the first sliding cavity.

[0013] Further, the outer diameter of the second wrench is adapted to the inner diameter of the second sliding cavity, and the inner diameter of the through hole is greater than the major diameter of the second thread portion.

[0014] Further, the housing, the first wrench, and the second wrench are all of hexagonal prism structure.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1) Only by rotating the double-threaded screw rod can the first wrench and the second wrench be extended step by step. The housing, the first wrench, and the second wrench can be used as an internal hexagon respectively, which is convenient for use and storage.

[0017] 2) Only a small section of internal thread is provided on the inner side of the first wrench and the second wrench, which reduces the processing cost and is convenient for use and maintenance. Description of the Drawings

[0018] Figure 1 is an exploded view of a combined internal hexagon wrench of the present utility model;

[0019] Figure 2 is a cross-sectional view of a combined internal hexagon wrench of the present utility model;

[0020] Figure 3 is a working schematic diagram of a combined internal hexagon wrench of the present utility model;

[0021] Figure 4 This is a schematic diagram of the operation of the first wrench in the present utility model;

[0022] Figure 5 This is a schematic diagram of the operation of the first wrench and the second wrench in the present utility model;

[0023] Figure 6 This is a schematic diagram of the handle in the present utility model;

[0024] Figure 7 This is a schematic diagram of the ratchet washer in the present utility model;

[0025] Figure 8 This is a schematic diagram of the ratchet groove in the present utility model;

[0026] In the figure, 1 is a double-threaded screw rod, 11 is the first thread portion, 12 is the second thread portion, 13 is the intermediate portion, 14 is the handle, 15 is the ratchet washer, 16 is the holding force spring, 2 is the housing, 21 is the limiting cavity, 22 is the adjusting cavity, 23 is the first sliding cavity, 24 is the ratchet groove, 3 is the first wrench, 31 is the limiting cap, 32 is the main body, 33 is the first screw hole, 34 is the second sliding cavity, 4 is the second wrench, 41 is the second screw hole, and 42 is the through hole. Specific embodiments

[0027] Next, the technical solution of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0028] Refer to Figures 1-8 , the present utility model provides a technical solution:

[0029] As Figures 1-8 shown, a combined internal hexagonal wrench includes a double-threaded screw rod 1, a housing 2, a first wrench 3 and a second wrench 4. The housing 2, the first wrench 3 and the second wrench 4 are sleeved in sequence from outside to inside.

[0030] Specifically, the housing 2 sequentially includes a limiting cavity 21, an adjusting cavity 22 and a first sliding cavity 23 from top to bottom; among them, the first wrench 3 includes a limiting cap 31 and a main body 32. A first screw hole 33 is provided in the middle of the limiting cap 31, and a second sliding cavity 34 is provided in the main body 32. The first screw hole 33 and the second sliding cavity 34 are communicated and on the same central line. A through hole 42 is provided in the middle of the second wrench 4, a second screw hole 41 is provided at one end of the through hole 42, the second screw hole 41 and the through hole 42 are communicated, and the second screw hole 41 and the through hole 42 are on the same central line.

[0031] Further, the outer diameter of the limit cap 31 is adapted to the inner diameter of the adjustment cavity 22, and the outer diameter of the main body 32 is adapted to the inner diameter of the first sliding cavity 23. Therefore, the first wrench 3 is located inside the housing 2 and is slidably connected to the housing 2. At the same time, the inner diameter of the adjustment cavity 22 is larger than the inner diameter of the first sliding cavity 23, and the inner diameter of the first sliding cavity 23 is larger than the inner diameter of the second sliding cavity 34, so that the first wrench 3 can only move within a certain distance in the adjustment cavity 22 and will not fall out of the housing 2.

[0032] Further, the outer diameter of the second wrench 4 is adapted to the inner diameter of the second sliding cavity 34, and the second wrench 4 is inserted into the first wrench 3 and is slidably connected to the first wrench 3.

[0033] Further, the double-threaded screw rod 1 includes a first thread portion 11, an intermediate portion 13, and a second thread portion 12. The intermediate portion 13 is located at the position of the adjustment cavity 22, the second thread portion 12 is located at the position of the first sliding cavity 23, the pitch diameter of the first thread portion 11 is larger than the pitch diameter of the second thread portion 12. The double-threaded screw rod 1 passes through the limit cavity 21 and is threadedly connected to the first wrench 3 and the second wrench 4 respectively. The first thread portion 11 is threadedly connected to the first screw hole 33, and the second screw hole 41 is located at the position of the intermediate portion 13. The inner diameter of the limit cavity 21 is larger than the major diameter of the thread of the first thread portion 11, and the inner diameter of the through hole 42 is larger than the major diameter of the thread of the second thread portion 12.

[0034] Through the above technical solution, the double-threaded screw rod 1 is inserted into the housing 2 from one end of the second thread portion 12, and sequentially passes through the limit cavity 21, the adjustment cavity 22 and is connected to the first wrench 3 and the second wrench 4. Since the second thread portion 12 is smaller than the first thread portion 11, the second thread portion 12 passes through the first wrench 3 and is directly connected to the second wrench 4. In the initial state, the second screw hole 41 is at the position of the intermediate portion 13, the first thread portion 11 extends into the through hole 42, and the first thread portion 11 is threadedly connected to the first screw hole 33 on the first wrench 3.

[0035] As Figure 3 and Figure 4 shown, by rotating the double-threaded screw rod 1, the first wrench 3 cooperating with the first thread portion 11 will move relatively. At this time, the limit cap 31 moves to the right in the adjustment cavity 22, and the main body 32 moves to the right in the first sliding cavity 23 until the first wrench 3 extends out of the housing 2. At the same time, in the initial state, the second screw hole 41 is at the position of the intermediate portion 13, and the second screw hole 41 does not have a threaded fit with the intermediate portion 13. Therefore, at this time, the double-threaded screw rod 1 idles with the second wrench 4 and will not drive the second wrench 4 to move.

[0036] As Figure 5As shown, as the double-threaded screw rod 1 continues to rotate, one side of the limit cap 31 gradually approaches the adjustment cavity 22, and the limit cap 31 also starts to abut against one end of the first wrench 3. As the double-threaded screw rod 1 continues to rotate, the limit cap 31 pushes the second screw hole 41 on the second wrench 4 to move from the middle part 13 to the second thread part 12, so that the second wrench 4 is threadedly connected to the double-threaded screw rod 1. When the limit cap 31 abuts against the adjustment cavity 22, the first screw hole 33 on the limit cap 31 at this time is located at the middle part 13 of the double-threaded screw rod 1, and the double-threaded screw rod 1 is disengaged from the threaded fit with the first wrench 3, and the first wrench 3 is in the maximum extended state and no longer moves. At the same time, the second thread part 12 cooperates with the second screw hole 41. As the double-threaded screw rod 1 continues to rotate, the second wrench 4 moves to the right and gradually extends out of the first wrench 3.

[0037] Through the above solution, the first wrench 3 and the second wrench 4 can be extended step by step. At the same time, each wrench is only provided with a small section of internal thread on the inner side, reducing the processing cost and facilitating use and maintenance.

[0038] When the second wrench 4 and the first wrench 3 are retracted: Reverse the double-threaded screw rod 1. At this time, only the second wrench 4 is threadedly connected to the double-threaded screw rod 1. Therefore, as the double-threaded screw rod 1 rotates, the second wrench 4 is retracted into the first wrench 3 until the second wrench 4 abuts against the limit cap 31. As the double-threaded screw rod 1 continues to rotate, the second wrench 4 drives the limit cap 31 to move until the first screw hole 33 cooperates with the first thread part 11, and the second screw hole 41 enters the middle part 13. At this time, under the threaded fit, the first wrench 3 moves and is retracted into the housing 2.

[0039] Further, one end of the double-threaded screw rod 1 close to the first thread part 11 is provided with a handle 14. A ratchet gasket 15 is provided between the handle 14 and the first thread part 11, and a holding force spring 16 is provided between the handle 14 and the ratchet gasket 15. One end of the housing 2 close to the limit cavity 21 is provided with a ratchet groove 24. The diameter of the ratchet groove 24 is larger than the inner diameter of the limit cavity 21, and the ratchet groove 24 cooperates with the ratchet gasket 15.

[0040] Through the above technical solution, the double-threaded screw rod 1 is driven to rotate by rotating the handle 14, which is convenient for rotation. At the same time, due to the setting of the ratchet gasket 15 and the ratchet groove 24, the ratchet gasket 15 is driven to rotate synchronously after the handle 14 is rotated. The ratchet gasket 15 cooperates with the ratchet groove 24. At the same time, the ratchet gasket 15 is slidably connected to the upper end part of the double-threaded screw rod 1. The ratchet gasket 15 will move up and down along its own groove path in the groove provided at the upper end of the double-threaded screw rod 1 to ensure that only when the double-threaded screw rod 1 is actively rotated during use will the entire structure move. At the same time, through the holding force spring 16, the cooperation between the ratchet gasket 15 and the ratchet groove 24 will not become loose, playing a limiting role.

[0041] Further, the housing 2, the first wrench 3, and the second wrench 4 are all hexagonal prism structures.

[0042] Preferably, the housing 2 is an M12 internal hexagon, the first wrench 3 is an M6 internal hexagon, and the second wrench 4 is an M3 internal hexagon.

[0043] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and alterations made by those skilled in the art that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A combined internal hexagonal wrench, characterized in that: It includes a double-threaded screw rod (1), a housing (2), a first wrench (3) and a second wrench (4). The housing (2), the first wrench (3) and the second wrench (4) are sleeved in sequence from outside to inside. The first wrench (3) is slidably connected to the housing (2), and the second wrench (4) is slidably connected to the first wrench (3). Inside the housing (2), there are a limit cavity (21), an adjustment cavity (22) and a first sliding cavity (23) in sequence from top to bottom. The first wrench (3) includes a limit cap (31) and a main body (32). A first screw hole (33) is provided in the middle of the limit cap (31). A second sliding cavity (34) is provided inside the main body (32). A through hole (42) is provided in the middle of the second wrench (4), and a second screw hole (41) is provided at one end of the through hole (42). The double-threaded screw rod (1) includes a first thread portion (11), an intermediate portion (13) and a second thread portion (12). The intermediate portion (13) is located at the position of the adjustment cavity (22), and the second thread portion (12) is located at the position of the first sliding cavity (23). The pitch diameter of the first thread portion (11) is larger than the pitch diameter of the second thread portion (12). The double-threaded screw rod (1) passes through the limit cavity (21) and is respectively connected to the first wrench (3) and the second wrench (4). The first thread portion (11) is threadedly connected to the first screw hole (33), and the second screw hole (41) is threadedly located at the position of the intermediate portion (13).

2. The combined hexagon wrench according to claim 1, characterized in that: A handle (14) is provided at one end of the double-threaded screw rod (1) close to the first thread portion (11). A ratchet washer (15) is provided between the handle (14) and the first thread portion (11), and a retaining force spring (16) is provided between the handle (14) and the ratchet washer (15).

3. The combined internal hexagonal wrench according to claim 2, characterized in that: A ratchet groove (24) is provided at one end of the housing (2) close to the limit cavity (21). The diameter of the ratchet groove (24) is larger than the inner diameter of the limit cavity (21), and the ratchet groove (24) is matched with the ratchet washer (15).

4. The combined hexagon wrench according to claim 1, characterized in that: The inner diameter of the adjustment cavity (22) is larger than the inner diameter of the first sliding cavity (23). The inner diameter of the first sliding cavity (23) is larger than the inner diameter of the second sliding cavity (34). The inner diameter of the limit cavity (21) is larger than the major diameter of the thread of the first thread portion (11). The outer diameter of the limit cap (31) is adapted to the inner diameter of the adjustment cavity (22), and the outer diameter of the main body (32) is adapted to the inner diameter of the first sliding cavity (23).

5. The combined internal hexagonal wrench according to claim 1, characterized in that: The outer diameter of the second wrench (4) is adapted to the inner diameter of the second sliding cavity (34), and the inner diameter of the through hole (42) is larger than the major diameter of the thread of the second thread portion (12).

6. The combined hexagon wrench according to claim 1, wherein: The housing (2), the first wrench (3) and the second wrench (4) are all of hexagonal prism structure.

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