Novel replaceable electric open spanner working head

Abstract

The utility model relates to the field of open wrenches, in particular to a novel replaceable electric open wrench working head which comprises a fixed outer box lower cover, a first open groove is formed in the lower end of the inner wall of the fixed outer box lower cover in a penetrating mode, a fixed plate is fixedly connected to the inner wall of the first open groove, and an open gear is movably installed at the upper end of the fixed plate. An opening plate is fixedly connected to the inner wall of the opening gear, a groove is formed in the lower end of the opening gear, and the inner wall of the groove is matched with the outer wall of the fixing plate. The output end of the power device is installed on the rotating column, after the power device is started, the rotating column rotates in the first bearing and the second bearing and drives the driving gear to rotate, the driving gear drives the sector gear to rotate, and the sector gear drives the driven pinion to rotate. The driven pinions drive the opening gear to rotate, when the U-shaped opening portion of the opening gear rotates to the position of one of the driven pinions, the other driven pinion can provide power for the opening gear, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of open-end wrenches, and in particular relates to a novel replaceable electric open-end wrench working head. Background Art

[0002] As a commonly used tool, electric open-end wrenches are widely used in the installation, maintenance and disassembly of various mechanical equipment. Compared with traditional manual open-end wrenches, electric open-end wrenches are powered by electric motors and can quickly tighten and loosen nuts or bolts, greatly improving work efficiency and reducing labor intensity. They can also be easily operated in some high-intensity or difficult-to-access locations. However, electric open-end wrenches usually have a fixed working head, and their opening size and shape are pre-set, which makes it difficult to adapt to nuts of various specifications, and they cannot be used for nuts with tubes or wires in the middle.

[0003] Therefore, it is necessary to design some electric open-end wrenches with replaceable working heads. By replacing working heads of different specifications to adapt to different operating requirements, the versatility of the tool is improved. However, when the electric open-end wrenches in the prior art are faced with nuts or bolts of different specifications, it is often necessary to replace the entire wrench tool, which increases the operating cost and the burden of carrying the tool. In addition, the electric open-end wrenches are not stable enough and the connection between the working head and the wrench body is not firm enough, which affects the tool's efficiency and user experience.

[0004] Therefore, a new type of replaceable electric open-end wrench working head is proposed, which can easily and quickly replace working heads of different specifications, ensure a stable connection between the working head and the wrench body, and improve the working environment and service life of the tool. Utility Model Content

[0005] In order to overcome the problems that the electric open-end wrenches with replaceable working heads in the prior art are usually not convenient and quick to replace working heads of different specifications, the connection between the working head and the wrench body is not stable, and the use environment and service life are insufficient.

[0006] The technical scheme of the utility model is as follows: a novel replaceable electric open-end wrench working head comprises a fixed outer box lower cover; a fixed outer box upper cover and a gear upper cover for fixing are arranged at the upper end of the fixed outer box lower cover, a first fixed block and a first fixed column are fixedly connected to the lower end of the inner wall of the fixed outer box lower cover, a lower cover connecting block is fixedly connected to the right end of the fixed outer box lower cover, the lower cover connecting block is one-half of a circular ring, two second fixed columns symmetrically front and back about the center point of the fixed outer box lower cover are fixedly connected to the lower end of the inner wall of the fixed outer box lower cover, a rotating assembly is arranged at the upper end of the first fixed block, a sector gear for rotating is arranged on the outer wall of the first fixed column, a driven pinion for rotating is arranged on the outer wall of the second fixed column, the sector gear and the driven pinion are meshed with each other, a first opening groove is penetrated through the lower end of the inner wall of the fixed outer box lower cover, a fixing plate is fixedly connected to the inner wall of the first opening groove, a fixing assembly is movably installed on the upper end of the fixing plate, a second notch is penetrated through the upper end of the fixed outer box upper cover, and a self-locking assembly is movably installed inside the second notch.

[0007] Preferably, by installing the output end of the power device on the rotating column, after turning on the power device, the rotating column rotates inside the first bearing and the second bearing, the rotating column drives the active gear to rotate, the active gear drives the fan gear to rotate, the fan gear drives the driven pinion to rotate, and the driven pinion drives the open gear to rotate. When the "U"-shaped mouth of the open gear is transferred to one of the driven pinion positions, the other driven pinion will also provide power to the open gear to ensure the normal operation of the equipment. Since the inner wall of the groove and the outer wall of the fixed plate are adapted, the outer wall of the open gear and the two driven pinions are meshed with each other, the driven pinion can drive the open gear to rotate steadily on the outer wall of the fixed plate, thereby improving the service life. If you want to realize the function of a manual wrench, turn off the power device, rotate the third fixed block, align the fourth fixed block with the third notch, and under the action of gravity, when the fourth fixed block passes through the second fixed block, Rotate the third fixed block to a suitable angle again. At this time, the third fixed block falls into the upper end of the second fixed block, and the fifth notch is just stuck in the outer wall of the rotating column to complete the locking. Since the inner wall of the fifth notch is provided with elastic material, the connection firmness can be enhanced. When the size of the opening plate is not suitable, the gear cover can be opened by bolts. Since the opening gear is movably installed on the upper end of the fixed plate, the opening gear can be quickly taken out and replaced with opening plates of different specifications. The operation is simple and there is no need to disassemble the entire wrench tool, which improves work efficiency. In addition, the upper end of the fixed outer box lower cover is threadedly connected to the fixed outer box upper cover, and the upper end of the fixed outer box lower cover is threadedly connected to the gear upper cover, which is more stable when using the equipment, solving the problem that the electric open-end wrench with replaceable working head in the prior art is usually not convenient and quick to replace working heads of different specifications, the connection between the working head and the wrench body is unstable, and the use environment and service life are insufficient.

[0008] Preferably, the rotating assembly includes a first bearing, a rotating column, a second bearing and a driving gear. A first slot is penetrated through the left end of the first fixed block, a first bearing is fixedly connected to the upper end of the first slot, a rotating column is rotatably mounted on the inner wall of the first bearing, a second bearing is fixedly connected to the inner wall of the lower cover connecting block, an outer wall of the rotating column fits with the inner wall of the second bearing, a driving gear is fixedly connected to the left end of the rotating column, the rotating column is connected by a power device, and when the rotating column rotates, the driving gear is driven to rotate, which can greatly improve work efficiency.

[0009] Preferably, the fixed component includes an open gear, an open plate and a groove. The open gear is movably mounted on the upper end of the fixed plate. The outer wall of the open gear is meshed with two driven pinions. The open gear is "U"-shaped. The inner wall of the open gear is fixedly connected to the open plate. A groove is provided at the lower end of the open gear. The inner wall of the groove is matched with the outer wall of the fixed plate. When in use, the driven pinion drives the open gear to rotate. When the "U"-shaped mouth of the open gear is rotated to one of the driven pinion positions, the other driven pinion will also provide power to the open gear to ensure the normal operation of the equipment.

[0010] Preferably, the self-locking component includes a support column, a third fixed block, a fourth fixed block and a fifth slot, the inner wall of the second slot is fixedly connected to the second fixed block, the upper end of the second fixed block is penetrated with a third slot, the inner wall of the third slot is movably mounted with a support column, the upper end of the support column is fixedly connected to the third fixed block, the outer wall of the third fixed block is matched with the inner wall of the second slot, the lower end of the support column is fixedly connected to the fourth fixed block, the outer wall of the fourth fixed block is matched with the inner wall of the third slot, the left end of the fourth fixed block is penetrated with a fifth slot, the inner wall of the fifth slot is matched with the outer wall of the rotating column, when in use, the wrench can be locked by installing it on the outer wall of the rotating column through the fifth slot to realize the function of a manual wrench, and since the inner wall of the fifth slot is provided with elastic material, the stability of the structural connection is enhanced.

[0011] Preferably, the right end of the fixed outer box upper cover is fixedly connected with an upper cover connecting block, and the upper cover connecting block and the lower cover connecting block have the same structure. A fourth slot is opened at the left end of the fixed outer box upper cover, and the upper cover connecting block has the same structure as the lower cover connecting block, which helps to maintain balance during use and reduce eccentric force and unnecessary vibration.

[0012] Preferably, a second opening slot is provided through the upper end of the gear upper cover, an arc block is fixedly connected to the right end of the gear upper cover, the outer wall of the arc block is adapted to the inner wall of the fourth slot, and the positions of the opening plate, the second opening slot and the first opening slot correspond to each other one by one. Through the opening structure of the opening plate, the second opening slot and the first opening slot, it can adapt to more working environments.

[0013] Preferably, the upper end of the fixed outer box lower cover is threadedly connected to the fixed outer box upper cover, and the upper end of the fixed outer box lower cover is threadedly connected to the gear upper cover. When in use, the fixed outer box upper cover and the gear upper cover can be quickly disassembled and reinstalled by bolts, which is convenient for replacement and maintenance.

[0014] Beneficial effects of the utility model:

[0015] 1. By installing the open plate on the nut, since the open plate, the fixed plate and the second open groove are all open structures, they can be used in a variety of working environments. The output end of the power device is installed on the rotating column. After the power device is turned on, the rotating column rotates inside the first bearing and the second bearing, and the rotating column drives the active gear to rotate, the active gear drives the fan gear to rotate, the fan gear drives the driven pinion to rotate, and the driven pinion drives the open gear to rotate. When the "U"-shaped mouth of the open gear is transferred to one of the driven pinion positions, the other driven pinion will also provide power to the open gear to ensure the normal operation of the equipment. Since the inner wall of the groove and the outer wall of the fixed plate are adapted, the outer wall of the open gear and the two driven pinions are meshed with each other, and the driven pinion can drive the open gear to rotate stably on the outer wall of the fixed plate, thereby improving the service life and solving the problems of unstable connection between the working head and the wrench body and insufficient service life of the electric open-end wrench with replaceable working head in the prior art;

[0016] 2. Rotate the third fixing block and align the fourth fixing block with the third notch. Under the action of gravity, when the fourth fixing block passes through the second fixing block, rotate the third fixing block again to a suitable angle. At this time, the third fixing block falls into the upper end of the second fixing block, and the fifth notch is just stuck on the outer wall of the rotating column to complete the locking. Since the inner wall of the fifth notch is provided with elastic material, the connection firmness can be enhanced to realize the function of a manual wrench;

[0017] 3. When the size of the opening plate is not suitable, the gear cover can be opened by bolts. Since the opening gear is movably installed on the upper end of the fixed plate, the opening gear can be quickly taken out and replaced with opening plates of different specifications. The operation is simple and there is no need to disassemble the entire wrench tool, which improves work efficiency. Since the upper end of the fixed outer box lower cover is threadedly connected to the fixed outer box upper cover, and the upper end of the fixed outer box lower cover is threadedly connected to the gear upper cover, the equipment is more stable when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 What is shown is a three-dimensional structural schematic diagram of a new replaceable electric open-end wrench working head of the utility model;

[0019] Figure 2 Shown is a three-dimensional schematic diagram of a fixed outer box lower cover of a new type of replaceable electric open-end wrench working head of the utility model;

[0020] Figure 3 The present invention shows a schematic diagram of a three-dimensional disassembly structure of a rotating assembly of a new type of replaceable electric open-end wrench working head;

[0021] Figure 4 Shown is a three-dimensional structural schematic diagram of an upper cover connecting block and a gear upper cover of a new type of replaceable electric open-end wrench working head of the utility model;

[0022] Figure 5 Shown is a three-dimensional structural schematic diagram of a fixing assembly of a new type of replaceable electric open-end wrench working head of the utility model;

[0023] Figure 6 Shown is a three-dimensional structural schematic diagram of a self-locking component of a new type of replaceable electric open-end wrench working head of the utility model.

[0024] The marks in the accompanying drawings are: 1. fix the lower cover of the outer box; 2. the first fixed block; 3. the first notch; 4. the first fixed column; 5. the lower cover connecting block; 6. the second fixed column; 701, the first open slot; 702, the fixed plate; 801, the first bearing; 802, the rotating column; 803, the second bearing; 804, the driving gear; 9. the fan gear; 10. the driven pinion; 11. the open gear; 12. the open plate; 13. the groove; 14. fix the upper cover of the outer box; 15. the second notch; 16. the second fixed block; 17. the third notch; 18. the upper cover connecting block; 19. the fourth notch; 20. the gear upper cover; 21. the second open slot; 22. the arc block; 23. the support column; 24. the third fixed block; 25. the fourth fixed block; 26. the fifth notch. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Example 1

[0027] See also Figure 1-6The utility model provides an embodiment: a novel replaceable electric open-end wrench working head, comprising a fixed outer box lower cover 1; the upper end of the fixed outer box lower cover 1 is provided with a fixed outer box upper cover 14 and a gear upper cover 20 for fixing, the lower end of the inner wall of the fixed outer box lower cover 1 is fixedly connected with a first fixing block 2 and a first fixing column 4, the right end of the fixed outer box lower cover 1 is fixedly connected with a lower cover connecting block 5, the lower cover connecting block 5 is one half of a circular ring, the lower end of the inner wall of the fixed outer box lower cover 1 is fixedly connected with two second fixing columns 6 symmetrically front and back about the center point of the fixed outer box lower cover 1, the first fixing block 2 A rotating component is provided at the upper end, a sector gear 9 for rotation is provided at the outer wall of the first fixed column 4, a driven pinion 10 for rotation is provided at the outer wall of the second fixed column 6, the sector gear 9 and the driven pinion 10 are meshed with each other, a first opening groove 701 is penetrated at the lower end of the inner wall of the fixed outer box lower cover 1, a fixing plate 702 is fixedly connected to the inner wall of the first opening groove 701, a fixing component is movably installed at the upper end of the fixing plate 702, a second slot 15 is penetrated at the upper end of the fixed outer box upper cover 14, a self-locking component is movably installed inside the second slot 15.

[0028] See also Figure 2 and 3 In this embodiment, the rotating assembly includes a first bearing 801, a rotating column 802, a second bearing 803 and a driving gear 804. The left end of the first fixed block 2 is penetrated by a first notch 3, the upper end of the first notch 3 is fixedly connected to the first bearing 801, the inner wall of the first bearing 801 is rotatably mounted with a rotating column 802, the inner wall of the lower cover connecting block 5 is fixedly connected to the second bearing 803, the outer wall of the rotating column 802 is in contact with the inner wall of the second bearing 803, and the left end of the rotating column 802 is fixedly connected to the driving gear 804.

[0029] See also Figure 4 and 6 In this embodiment, the self-locking component includes a support column 23, a third fixed block 24, a fourth fixed block 25 and a fifth slot 26. The inner wall of the second slot 15 is fixedly connected to the second fixed block 16, and the upper end of the second fixed block 16 is penetrated with a third slot 17. The inner wall of the third slot 17 is movably mounted with the support column 23, the upper end of the support column 23 is fixedly connected to the third fixed block 24, and the outer wall of the third fixed block 24 is matched with the inner wall of the second slot 15. The lower end of the support column 23 is fixedly connected to the fourth fixed block 25, and the outer wall of the fourth fixed block 25 is matched with the inner wall of the third slot 17. The left end of the fourth fixed block 25 is penetrated with a fifth slot 26, and the inner wall of the fifth slot 26 is matched with the outer wall of the rotating column 802.

[0030] See also Figure 2 and 4In this embodiment, a second opening slot 21 is formed through the upper end of the gear upper cover 20, and an arc block 22 is fixedly connected to the right end of the gear upper cover 20. The outer wall of the arc block 22 is matched with the inner wall of the fourth slot 19, and the positions of the opening plate 12, the second opening slot 21 and the first opening slot 701 correspond to each other.

[0031] When in use, the opening plate 12 is installed on the nut. Since the opening plate 12, the fixing plate 702 and the second opening groove 21 are all open structures, they can be used in a variety of working environments. The output end of the power device is installed on the rotating column 802. After the power device is turned on, the rotating column 802 rotates inside the first bearing 801 and the second bearing 803, and the rotating column 802 drives the active gear 804 to rotate, and the active gear 804 drives the fan gear 9 to rotate, and the fan gear 9 drives the driven pinion 10 to rotate, and the driven pinion 10 drives the fixed component to rotate. Since the fixed component is movably installed on the upper end of 702, when facing different specifications When the nuts of different specifications are tightened, the gear cover 20 can be opened by bolts, and the fixing components of different specifications can be replaced conveniently and quickly. If the function of a manual wrench is to be realized, the power device is turned off, the third fixing block 24 is rotated, and the fourth fixing block 25 is aligned with the third notch 17. Under the action of gravity, when the fourth fixing block 25 passes through the second fixing block 16, the third fixing block 24 is rotated to a suitable angle again. At this time, the third fixing block 24 falls into the upper end of the second fixing block 16, and the fifth notch 26 is just stuck on the outer wall of the rotating column 802 to complete the locking. Since the inner wall of the fifth notch 26 is provided with elastic material, the connection firmness can be enhanced.

[0032] Example 2

[0033] See also Figure 2 and 5 In this embodiment, the fixing assembly includes an open gear 11, an open plate 12 and a groove 13. The open gear 11 is movably mounted on the upper end of the fixing plate 702. The outer wall of the open gear 11 is meshed with the two driven pinions 10. The open gear 11 is in a "U" shape. The inner wall of the open gear 11 is fixedly connected to the open plate 12. A groove 13 is provided at the lower end of the open gear 11. The inner wall of the groove 13 is adapted to the outer wall of the fixing plate 702.

[0034] When in use, since the inner wall of the groove 13 is adapted to the outer wall of the fixed plate 702, the open gear 11 and the two driven pinions 10 are meshed with each other, and the open gear 11 can rotate steadily on the outer wall of the fixed plate 702, thereby enhancing the stability of the open plate and the main body of the equipment and improving the service life. When the driven pinion drives the open gear to rotate, when the "U"-shaped mouth of the open gear 11 is transferred to the position of one of the driven pinions 10, the other driven pinion 10 will also provide power to the open gear 11 to ensure the normal operation of the equipment.

[0035] See also Figure 2 and 4 In this embodiment, the right end of the fixed outer box upper cover 14 is fixedly connected with an upper cover connecting block 18, the upper cover connecting block 18 and the lower cover connecting block 5 are of the same structure, and the left end of the fixed outer box upper cover 14 is provided with a fourth notch 19.

[0036] See also Figure 1 In the present embodiment, the upper end of the fixed outer box lower cover 1 is threadedly connected to the fixed outer box upper cover 14 , and the upper end of the fixed outer box lower cover 1 is threadedly connected to the gear upper cover 20 .

[0037] Working principle: First, install the opening plate 12 on the nut. Since the opening plate 12, the fixed plate 702 and the second opening groove 21 are all open structures, they can be used in a variety of working environments. The output end of the power device is installed on the rotating column 802. After the power device is turned on, the rotating column 802 rotates inside the first bearing 801 and the second bearing 803, and the rotating column 802 drives the active gear 804 to rotate, and the active gear 804 drives the fan gear 9 to rotate, and the fan gear 9 drives the driven pinion 10 to rotate, and the driven pinion 10 drives the opening gear 11 to rotate. When the "U"-shaped mouth of the opening gear 11 is transferred to the position of one of the driven pinions 10, the other driven pinion 10 will also provide power to the opening gear 11 to ensure the normal operation of the equipment. Since the inner wall of the groove 13 is adapted to the outer wall of the fixed plate 702, the outer wall of the opening gear 11 is meshed with the two driven pinions 10, and the driven pinion 10 can drive the opening gear 11 to rotate steadily on the outer wall of the fixed plate 702, thereby improving the service life.

[0038] If you want to realize the function of a manual wrench, turn off the power device, rotate the third fixing block 24, align the fourth fixing block 25 with the third notch 17, and under the action of gravity, when the fourth fixing block 25 passes through the second fixing block 16, rotate the third fixing block 24 again to a suitable angle. At this time, the third fixing block 24 falls into the upper end of the second fixing block 16, and the fifth notch 26 is just stuck on the outer wall of the rotating column 802, completing the locking. Since the inner wall of the fifth notch 26 is provided with elastic material, the connection firmness can be enhanced;

[0039] Then, when the size of the opening plate 12 is not suitable, the gear upper cover 20 can be opened by bolts. Since the opening gear 11 is movably mounted on the upper end of the fixed plate 702, the opening gear 11 can be quickly taken out and the opening plates 12 of different specifications can be replaced. The operation is simple and there is no need to disassemble the entire wrench tool, thereby improving work efficiency.

[0040] In addition, the upper end of the fixed outer box lower cover 1 is threadedly connected to the fixed outer box upper cover 14, and the upper end of the fixed outer box lower cover 1 is threadedly connected to the gear upper cover 20, so that the device is more stable when in use.

[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A novel replaceable electric open-end wrench working head, comprising a fixed outer box lower cover (1); characterized in that: The upper end of the fixed outer box lower cover (1) is provided with a fixed outer box upper cover (14) and a gear upper cover (20) for fixing, the lower end of the inner wall of the fixed outer box lower cover (1) is fixedly connected with a first fixed block (2) and a first fixed column (4), the right end of the fixed outer box lower cover (1) is fixedly connected with a lower cover connecting block (5), the lower cover connecting block (5) is one-half of a circular ring, the lower end of the inner wall of the fixed outer box lower cover (1) is fixedly connected with two second fixed columns (6) symmetrically arranged in front and back about the center point of the fixed outer box lower cover (1), the upper end of the first fixed block (2) is provided with a rotating assembly, the outer end of the first fixed column (4) is fixedly connected with a lower cover connecting block (5), and the lower cover connecting block (5) is one-half of a circular ring. The wall is provided with a sector gear (9) for rotation, the outer wall of the second fixed column (6) is provided with a driven pinion gear (10) for rotation, the sector gear (9) and the driven pinion gear (10) are meshed with each other, the lower end of the inner wall of the fixed outer box lower cover (1) is penetrated by a first opening groove (701), the inner wall of the first opening groove (701) is fixedly connected with a fixing plate (702), the upper end of the fixing plate (702) is movably mounted with a fixing component, the upper end of the fixed outer box upper cover (14) is penetrated by a second notch (15), and the interior of the second notch (15) is movably mounted with a self-locking component.

2. A novel replaceable electric open-end wrench working head according to claim 1, characterized in that: The rotating assembly comprises a first bearing (801), a rotating column (802), a second bearing (803) and a driving gear (804); a first notch (3) is formed through the left end of the first fixed block (2); the first bearing (801) is fixedly connected to the upper end of the first notch (3); the rotating column (802) is rotatably mounted on the inner wall of the first bearing (801); the second bearing (803) is fixedly connected to the inner wall of the lower cover connecting block (5); the outer wall of the rotating column (802) is in contact with the inner wall of the second bearing (803); and the driving gear (804) is fixedly connected to the left end of the rotating column (802).

3. The novel replaceable electric open-end wrench working head according to claim 1 is characterized in that: The fixing assembly comprises an open gear (11), an open plate (12) and a groove (13); the upper end of the fixing plate (702) is movably mounted with the open gear (11); the outer wall of the open gear (11) is meshed with two driven pinions (10); the open gear (11) is in a "U" shape; the inner wall of the open gear (11) is fixedly connected with the open plate (12); the lower end of the open gear (11) is provided with a groove (13); the inner wall of the groove (13) is matched with the outer wall of the fixing plate (702).

4. The novel replaceable electric open-end wrench working head according to claim 1 is characterized in that: The self-locking component comprises a support column (23), a third fixed block (24), a fourth fixed block (25) and a fifth notch (26); the inner wall of the second notch (15) is fixedly connected to the second fixed block (16); the upper end of the second fixed block (16) is provided with a third notch (17); the inner wall of the third notch (17) is movably mounted with the support column (23); the upper end of the support column (23) is fixedly connected to the third fixed block (24); the outer wall of the third fixed block (24) is matched with the inner wall of the second notch (15); the lower end of the support column (23) is fixedly connected to the fourth fixed block (25); the outer wall of the fourth fixed block (25) is matched with the inner wall of the third notch (17); the left end of the fourth fixed block (25) is provided with a fifth notch (26); the inner wall of the fifth notch (26) is matched with the outer wall of the rotating column (802).

5. The novel replaceable electric open-end wrench working head according to claim 1 is characterized in that: The right end of the fixed outer box upper cover (14) is fixedly connected with an upper cover connecting block (18), the upper cover connecting block (18) and the lower cover connecting block (5) are of the same structure, and the left end of the fixed outer box upper cover (14) is provided with a fourth notch (19).

6. The novel replaceable electric open-end wrench working head according to claim 3 is characterized in that: A second opening slot (21) is formed through the upper end of the gear upper cover (20), and an arc block (22) is fixedly connected to the right end of the gear upper cover (20). The outer wall of the arc block (22) is matched with the inner wall of the fourth slot (19), and the positions of the opening plate (12), the second opening slot (21) and the first opening slot (701) are in one-to-one correspondence and are equal.

7. The novel replaceable electric open-end wrench working head according to claim 1 is characterized in that: The upper end of the fixed outer box lower cover (1) is threadedly connected to the fixed outer box upper cover (14), and the upper end of the fixed outer box lower cover (1) is threadedly connected to the gear upper cover (20).

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