Electric ratchet wrench

Abstract

The invention belongs to the technical field of ratchet wrenches, and particularly relates to an electric ratchet wrench which comprises a wrench body, a self-locking motor is arranged on the front side of the interior of the wrench body, a fixing clamp is arranged in front of the self-locking motor, a fixing rod is arranged in the fixing clamp, and a first transmission block is arranged on the rear side of the interior of the fixing rod. A second transmission block is arranged on the front side of the first transmission block, a connecting rod is arranged in front of the second transmission block, a first spring and a second spring are arranged at the front end and the rear end of the connecting rod respectively, a movable head is arranged in the front end of a fixed rod, a clamping block is arranged behind the movable head, and a fixed block is arranged below the movable head. The electric ratchet wrench is composed of the wrench body, the fixing clamp, the fixing rod, the movable head, the self-locking motor, the first transmission block, the second transmission block, the first spring, the connecting rod, the second spring, the fixing block, the clamping block and the clamping spring, the structure is simple, all the parts are connected precisely and stably, and the assembling efficiency of the electric ratchet wrench is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ratchet wrenches, in particular to an electric ratchet wrench. Background Art

[0002] A ratchet wrench is a manual screw tightening tool, a single-head, double-head, and multi-specification adjustable-handle ratchet wrench. A ratchet wrench is usually composed of a main wrench and a slave wrench of different specifications and sizes connected by the female and male keys of a hinged key. Since a wrench has two specifications of wrench-shaped through holes, it can be used to tighten or loosen screws of two specifications, thereby expanding the scope of use and saving raw materials and labor costs. The adjustable handle can easily adjust the wrench use angle. This wrench is used for tightening and loosening screws and has the characteristics of strong applicability, easy use and low cost.

[0003] In the prior art, announcement number CN106166720B provides an electric ratchet wrench, including a main body, a ratcheting device, a power device and a transmission device, the ratcheting device is rotatably arranged on the main body and includes a ratcheting member, a ratchet block group pivotally arranged on the ratcheting member and a gear ring rotatably mounted on the ratcheting member, the power device includes a motor, and the transmission device includes a transmission rod, one end of the transmission rod is connected to the motor, and the other end of the transmission rod is selectively engaged or disengaged with the gear ring, and the motor drives the transmission rod to rotate the ratchet member, and the main body can be manually pulled to overcome the resistance of the driving process is greater than the torque of the motor to cause the transmission rod and the gear ring to jump.

[0004] In the above patent, the motor drives the transmission rod to rotate the ratchet member, and the body can be manually pulled to overcome the phenomenon of tooth jumping between the transmission rod and the gear ring caused by the resistance of the driving process being greater than the torque of the motor. However, the electric ratchet wrench still has some problems;

[0005] The electric ratchet wrench has a large number of internal components, and some of the structures are relatively loose, which makes the electric ratchet wrench difficult to assemble.

[0006] Therefore, an electric ratchet wrench is proposed to solve the above problems. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides an electric ratchet wrench, which solves the problem that the electric ratchet wrench in the prior art has a large number of internal components and some structures are relatively loose, resulting in difficulty in assembling the electric ratchet wrench.

[0009] (II) Technical solution

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric ratchet wrench, comprising a wrench body, a self-locking motor is arranged on the internal front side of the wrench body, a fixing card is arranged in front of the self-locking motor, a fixing rod is arranged in the fixing card, a first transmission block is arranged on the internal rear side of the fixing rod, a second transmission block is arranged on the front side of the first transmission block, a connecting rod is arranged in front of the second transmission block, a first spring and a second spring are respectively arranged on the front and rear ends of the connecting rod, a movable head is arranged inside the front end of the fixing rod, a clamping block is arranged behind the movable head, and a fixed block is arranged below the movable head.

[0011] Preferably, the self-locking motor is fixed inside the front end of the wrench body, the front end of the wrench body is engaged with a fixing card, and the fixing card is engaged with the front end of the self-locking motor.

[0012] Preferably, the fixing rod includes a storage rod, a storage slot and a groove, the rear end of the storage rod is engaged with the fixing card, and the storage rod and the fixing card are fixed by screws, the lower front end of the storage rod is engaged with the fixing block, and the storage rod and the fixing block are fixed by screws.

[0013] Preferably, the storage groove is opened inside the rear side of the storage rod, and the width of the storage groove is smaller at the front and larger at the back, and the groove is opened inside the front end of the storage rod, and the storage groove is connected to the groove.

[0014] Preferably, the first transmission block includes a first connecting block, a second slot and a second annular rack, the first connecting block rotates in the storage slot, the second slot is opened in the middle of the first connecting block, the second slot is engaged and connected with the output end of the self-locking motor, the second annular rack is fixedly connected to the front end of the first connecting block, and the second annular rack is arranged in a serrated shape.

[0015] Preferably, the second transmission block includes a second connecting block, a third annular rack and a third slot, the second connecting block rotates or moves forward and backward in the storage slot, the third slot is opened in the middle of the second connecting block, the third annular rack is fixedly connected to the rear end of the second connecting block, and the third annular rack is arranged in a serrated shape, and the third annular rack is meshed and connected with the second annular rack.

[0016] Preferably, the connecting rod includes a round rod, a hexagonal rod and a gear column, the round rod rotates on the front side of the storage groove, the rear end of the round rod is fixedly connected to the front end of the hexagonal rod, the rear end of the hexagonal rod is engaged with the third slot, the first spring is arranged on the hexagonal rod, the front end of the first spring is fit-connected to the rear end of the round rod, and the rear end of the first spring is fit-connected to the front end of the second connecting block, the rear end of the gear column is fixedly connected to the front end of the round rod, and the gear column rotates in the groove.

[0017] Preferably, the clamping block includes a U-shaped block, a stepped clamping slot and a hole slot, a stepped clamping slot is opened on the left front of the U-shaped block, the hole slot is opened in the middle of the U-shaped block, the hole slot is engaged with the gear column, and the gear column rotates in the hole slot, the U-shaped block moves back and forth on the gear column, the second spring is arranged on the gear column, the rear end of the second spring is fitted and connected to the front end of the round rod, and the front end of the second spring is fitted and connected to the rear end of the U-shaped block, the U-shaped block is arranged in the groove, and the U-shaped block moves back and forth in the groove.

[0018] Preferably, the movable head includes a hexagonal groove rod, a spur gear, a first annular rack and a first slot, the upper end of the hexagonal groove rod is rotatably connected to the front end of the storage rod, and the lower end of the hexagonal groove rod is rotatably connected to the fixed block, the two spur gears are symmetrically fixed on the hexagonal groove rod, and the spur gears rotate in the grooves, the spur gears are meshingly connected to the stepped slots, the first annular rack is fixed on the lower spur gear, and the first annular rack is meshingly connected to the gear column.

[0019] Preferably, the two first clamping grooves are respectively opened inside the upper and lower ends of the hexagonal inner groove rod, and the first clamping grooves are both provided with clamping springs, and the first clamping grooves are engaged and connected with the clamping springs.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present invention provides an electric ratchet wrench, which has the following beneficial effects:

[0022] 1. The invention is composed of a wrench body, a fixing card, a fixing rod, a movable head, a self-locking motor, a first transmission block, a second transmission block, a first spring, a connecting rod, a second spring, a fixing block, a clamping block and a retaining spring. It has a simple structure, and the connections between the components are precise and stable, thereby improving the assembly efficiency of the electric ratchet wrench.

[0023] 2. The invention drives the spur gear and the first annular rack to rotate clockwise through the clockwise rotation of the hexagonal groove rod, which in turn drives the gear column round rod and the hexagonal rod to rotate clockwise. The clockwise rotation of the hexagonal rod drives the second connecting block and the third annular rack to rotate clockwise. The clockwise rotation of the third annular rack will push the second connecting block forward, causing the third annular rack to disengage from the second annular rack, achieving idling, making it easier for the electric ratchet wrench to return to the center position, and making it more convenient to use the electric ratchet wrench manually when the power is off. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the present invention;

[0027] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of the fixing rod of the present invention;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the movable head of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the card block of the present invention;

[0030] Figure 6 is a schematic diagram of the three-dimensional structure of the connecting rod of the present invention;

[0031] Figure 7 is a schematic diagram of the three-dimensional structure of the second transmission block of the present invention;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the first transmission block of the present invention.

[0033] Legend:

[0034] 1. Wrench body; 2. Fixing card; 3. Fixing rod; 301. Storage rod; 302. Storage slot; 303. Groove; 4. Movable head; 401. Hexagonal groove rod; 402. Spur gear; 403. First annular rack; 404. First slot; 5. Self-locking motor; 6. First transmission block; 601. First connecting block; 602. Second slot; 603. Second annular rack; 7. Second transmission block; 701. Second connecting block; 702. Third annular rack; 703. Third slot; 8. First spring; 9. Connecting rod; 901. Round rod; 902. Hexagonal rod; 903. Gear column; 10. Second spring; 11. Fixing block; 12. Block; 1201. U-shaped block; 1202. Step slot; 1203. Hole slot; 13. Circlip. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Specific examples are given below.

[0037] See also Figure 1-Figure 8The present invention provides an electric ratchet wrench, comprising a wrench body 1, a self-locking motor 5 is arranged at the front side of the wrench body 1, a fixing card 2 is arranged in front of the self-locking motor 5, a fixing rod 3 is arranged in the fixing card 2, a first transmission block 6 is arranged at the rear side of the fixing rod 3, a second transmission block 7 is arranged in front of the first transmission block 6, a connecting rod 9 is arranged in front of the second transmission block 7, a first spring 8 and a second spring 10 are arranged at the front and rear ends of the connecting rod 9, a movable head 4 is arranged inside the front end of the fixing rod 3, a clamping block 12 is arranged behind the movable head 4, and a fixing block 11 is arranged below the movable head 4;

[0038] Specifically, the wrench body 1, the fixed card 2, the fixed rod 3, the movable head 4, the self-locking motor 5, the first transmission block 6, the second transmission block 7, the first spring 8, the connecting rod 9, the second spring 10, the fixed block 11, the clamping block 12 and the retaining spring 13 are composed. The structure is simple, and the connections between the components are precise and stable, which improves the assembly efficiency of the electric ratchet wrench.

[0039] like Figure 1 and Figure 2 As shown, the self-locking motor 5 is fixed inside the front end of the wrench body 1, the front end of the wrench body 1 is engaged with the fixing card 2, and the fixing card 2 is engaged with the front end of the self-locking motor 5;

[0040] Specifically, the self-locking motor 5 realizes self-locking when the power is off, so that the electric ratchet wrench can be used manually when the power is off.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the fixing rod 3 includes a receiving rod 301, a receiving groove 302 and a groove 303. The rear end of the receiving rod 301 is engaged with the fixing card 2, and the receiving rod 301 and the fixing card 2 are fixed by screws. The front end of the receiving rod 301 is engaged with the fixing block 11, and the receiving rod 301 and the fixing block 11 are fixed by screws. The receiving groove 302 is provided inside the rear side of the receiving rod 301, and the width of the receiving groove 302 is smaller at the front and larger at the back. The groove 303 is provided inside the front end of the receiving rod 301, and the receiving groove 302 is communicated with the groove 303.

[0042] Specifically, the fixing card 2 fixes the storage rod 301 .

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the first transmission block 6 includes a first connecting block 601, a second slot 602 and a second annular rack 603, the first connecting block 601 rotates in the receiving slot 302, the second slot 602 is arranged in the middle of the first connecting block 601, the second slot 602 is engaged with the output end of the self-locking motor 5, the second annular rack 603 is fixedly connected to the front end of the first connecting block 601, and the second annular rack 603 is arranged in a sawtooth shape, the second transmission block 7 includes a second connecting block 701, a third annular rack 702 and a third slot 703, the second connecting block 701 rotates or moves back and forth in the receiving slot 302, the third slot 703 is arranged in the middle of the second connecting block 701, the third annular rack 702 is fixedly connected to the rear end of the second connecting block 701, and the third annular rack 702 is arranged in a sawtooth shape, and the third annular rack 702 is meshed with the second annular rack 603;

[0044] Specifically, the second annular rack 603 and the third annular rack 702 are meshed in an arc shape, and the second annular rack 603 and the third annular rack 702 are arranged in a sawtooth shape to achieve unidirectional rotation transmission.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the connecting rod 9 includes a round rod 901, a hexagonal rod 902 and a gear column 903, the round rod 901 rotates at the front side of the storage groove 302, the rear end of the round rod 901 is fixedly connected to the front end of the hexagonal rod 902, the rear end of the hexagonal rod 902 is engaged with the third slot 703, the first spring 8 is arranged on the hexagonal rod 902, the front end of the first spring 8 is fitted and connected to the rear end of the round rod 901, and the rear end of the first spring 8 is fitted and connected to the front end of the second connecting block 701, the rear end of the gear column 903 is fixedly connected to the front end of the round rod 901, and the gear column 903 rotates in the groove 303;

[0046] Specifically, the receiving groove 302 limits and fixes the round rod 901 to prevent the round rod 901 from shifting when moving forward and backward. The first spring 8 pushes the second connecting block 701 and the third annular rack 702 to move backward, so that the third annular rack 702 engages with the second annular rack 603.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the block 12 includes a U-shaped block 1201, a stepped slot 1202 and a hole slot 1203. The stepped slot 1202 is provided on the left front of the U-shaped block 1201. The hole slot 1203 is provided in the middle of the U-shaped block 1201. The hole slot 1203 is engaged with the gear column 903, and the gear column 903 rotates in the hole slot 1203. The U-shaped block 1201 moves forward and backward on the gear column 903. The second spring 10 is provided on the gear column 903. The rear end of the second spring 10 is fitted and connected with the front end of the round rod 901, and the front end of the second spring 10 is fitted and connected with the rear end of the U-shaped block 1201. The U-shaped block 1201 is provided in the groove 303, and the U-shaped block 1201 moves forward and backward in the groove 303.

[0048] Specifically, the groove 303 receives the U-shaped block 1201 , and the second spring 10 pushes the U-shaped block 1201 and the stepped slot 1202 to move forward, so that the stepped slot 1202 is meshed with the spur gear 402 .

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the movable head 4 includes an inner hexagonal groove rod 401, a spur gear 402, a first annular rack 403 and a first clamping groove 404. The upper end of the inner hexagonal groove rod 401 is rotatably connected to the front end of the storage rod 301, and the lower end of the inner hexagonal groove rod 401 is rotatably connected to the fixed block 11. The two spur gears 402 are symmetrically fixed on the inner hexagonal groove rod 401, and the spur gears 402 rotate in the groove 303. The spur gears 402 are meshed and connected with the stepped clamping groove 1202. The first annular rack 403 is fixed on the upper side of the lower spur gear 402, and the first annular rack 403 is meshed and connected with the gear column 903. The two first clamping grooves 404 are respectively opened inside the upper and lower ends of the inner hexagonal groove rod 401, and the first clamping grooves 404 are provided with retaining springs 13, and the first clamping grooves 404 are engaged and connected with the retaining springs 13.

[0050] Specifically, the storage rod 301 and the fixing block 11 limit and fix the hexagonal groove rod 401, and the rotation of the gear column 903 drives the first annular rack 403 and the spur gear 402 to rotate, thereby driving the hexagonal groove rod 401 to rotate.

[0051] Working principle: When using the electric ratchet wrench, first replace the electric ratchet wrench with a batch head of the corresponding model, start the self-locking motor 5, the self-locking motor 5 drives the first connecting block and the second annular rack 603 to rotate counterclockwise, and then drives the third annular rack 702 and the second connecting block 701 to rotate counterclockwise, the second connecting block 701 rotates counterclockwise to drive the hexagonal rod 902, the round rod 901 and the gear column 903 to rotate counterclockwise, the gear column 903 rotates counterclockwise to drive the first annular rack 403 and the spur gear 402 to rotate clockwise, and then drives the hexagonal groove rod 401 to rotate clockwise, and the workpiece is twisted and disassembled, and the electric ratchet is used manually. When using the wrench, rotate the electric ratchet wrench counterclockwise, so that the hexagonal groove rod 401 rotates clockwise in the storage groove 302, driving the spur gear 402 and the first annular rack 403 to rotate clockwise, and then driving the gear column 903, the round rod 901 and the hexagonal rod 902 to rotate clockwise, and the hexagonal rod 902 rotates clockwise to drive the second connecting block 701 and the third annular rack 702 to rotate clockwise. The clockwise rotation of the third annular rack 702 will push the second connecting block 601 forward, so that the third annular rack 702 and the second annular rack 603 are disengaged, realizing idling, which is convenient for the electric ratchet wrench to be reset and the electric ratchet wrench to be used manually.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An electric ratchet wrench, comprising a wrench body (1), characterized in that: A self-locking motor (5) is arranged at the front side of the wrench body (1), a fixing card (2) is arranged in front of the self-locking motor (5), a fixing rod (3) is arranged inside the fixing card (2), a first transmission block (6) is arranged at the rear side of the fixing rod (3), a second transmission block (7) is arranged in front of the first transmission block (6), a connecting rod (9) is arranged in front of the second transmission block (7), a first spring (8) and a second spring (10) are arranged at the front and rear ends of the connecting rod (9), a movable head (4) is arranged inside the front end of the fixing rod (3), a clamping block (12) is arranged behind the movable head (4), and a fixing block (11) is arranged below the movable head (4).

2. An electric ratchet wrench according to claim 1, characterized in that: The self-locking motor (5) is fixed inside the front end of the wrench body (1), the front end of the wrench body (1) is engaged with a fixing card (2), and the fixing card (2) is engaged with the front end of the self-locking motor (5).

3. The electric ratchet wrench according to claim 1, characterized in that: The fixing rod (3) comprises a storage rod (301), a storage groove (302) and a groove (303); the rear end of the storage rod (301) is engaged with the fixing card (2), and the storage rod (301) and the fixing card (2) are fixed by screws; the lower front end of the storage rod (301) is engaged with the fixing block (11), and the storage rod (301) and the fixing block (11) are fixed by screws.

4. An electric ratchet wrench according to claim 3, characterized in that: The storage groove (302) is arranged inside the rear side of the storage rod (301), and the width of the storage groove (302) is smaller at the front and larger at the back. The groove (303) is arranged inside the front end of the storage rod (301), and the storage groove (302) is connected to the groove (303).

5. The electric ratchet wrench according to claim 1, characterized in that: The first transmission block (6) comprises a first connecting block (601), a second clamping groove (602) and a second annular rack (603); the first connecting block (601) rotates in the receiving groove (302); the second clamping groove (602) is arranged in the middle of the first connecting block (601); the second clamping groove (602) is engaged with the output end of the self-locking motor (5); the second annular rack (603) is fixedly connected to the front end of the first connecting block (601); and the second annular rack (603) is arranged in a sawtooth shape.

6. The electric ratchet wrench according to claim 1, characterized in that: The second transmission block (7) comprises a second connecting block (701), a third annular rack (702) and a third slot (703); the second connecting block (701) rotates or moves forward and backward in the receiving slot (302); the third slot (703) is arranged in the middle of the second connecting block (701); the third annular rack (702) is fixedly connected to the rear end of the second connecting block (701); the third annular rack (702) is arranged in a sawtooth shape; and the third annular rack (702) is meshedly connected to the second annular rack (603).

7. The electric ratchet wrench according to claim 1, characterized in that: The connecting rod (9) comprises a round rod (901), a hexagonal rod (902) and a gear column (903); the round rod (901) rotates at the front side inside the storage groove (302); the rear end of the round rod (901) is fixedly connected to the front end of the hexagonal rod (902); the rear end of the hexagonal rod (902) is engaged with the third slot (703); the first spring (8) is arranged on the hexagonal rod (902); the front end of the first spring (8) is fitted with the rear end of the round rod (901); and the rear end of the first spring (8) is fitted with the front end of the second connecting block (701); the rear end of the gear column (903) is fixedly connected to the front end of the round rod (901), and the gear column (903) rotates in the groove (303).

8. The electric ratchet wrench according to claim 1, characterized in that: The clamping block (12) comprises a U-shaped block (1201), a stepped clamping slot (1202) and a hole slot (1203). The U-shaped block (1201) is provided with a stepped clamping slot (1202) on the left front side. The hole slot (1203) is provided in the middle of the U-shaped block (1201). The hole slot (1203) is engaged with the gear column (903), and the gear column (903) rotates in the hole slot (1203). The U-shaped block (1201) is provided with a stepped clamping slot (1202) on the left front side. The hole slot (1203) is provided in the middle of the U-shaped block (1201). 01) moves back and forth on the gear column (903), the second spring (10) is arranged on the gear column (903), the rear end of the second spring (10) is closely connected to the front end of the round rod (901), and the front end of the second spring (10) is closely connected to the rear end of the U-shaped block (1201), the U-shaped block (1201) is arranged in the groove (303), and the U-shaped block (1201) moves back and forth in the groove (303).

9. The electric ratchet wrench according to claim 1, characterized in that: The movable head (4) comprises an inner hexagonal groove rod (401), a spur gear (402), a first annular rack (403) and a first clamping groove (404); the upper end of the inner hexagonal groove rod (401) is rotatably connected to the front end of the storage rod (301), and the lower end of the inner hexagonal groove rod (401) is rotatably connected to the fixed block (11); the two spur gears (402) are symmetrically fixed on the inner hexagonal groove rod (401), and the spur gears (402) rotate in the groove (303); the spur gears (402) are meshedly connected with the stepped clamping groove (1202); the first annular rack (403) is fixed on the upper side of the lower spur gear (402), and the first annular rack (403) is meshedly connected with the gear column (903).

10. An electric ratchet wrench according to claim 9, characterized in that: The two first clamping grooves (404) are respectively arranged inside the upper and lower ends of the hexagonal groove rod (401), and a clamping spring (13) is arranged in each of the first clamping grooves (404), and the first clamping grooves (404) are clamped and connected with the clamping spring (13).

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