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Ratchet wrench

A technology of ratchet wrench and gear, which is applied in the field of ratchet wrench, which can solve the problems of large minimum turning angle and the failure to ratchet the loose screw by reverse key adjustment, and achieve the effect of small turning angle of the ratchet wheel

Inactive Publication Date: 2009-12-16
王宁生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the disadvantages of the existing ratchet wrench, such as the adjustment of the hand in the forward and reverse directions, the ratchet cannot be achieved by loosening the screw, and the minimum turning angle is large, the invention provides a ratchet wrench, which effectively overcomes the deficiencies in the prior art

Method used

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  • Ratchet wrench
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: as figure 1 , figure 2 As shown, a square tenon 2 connected to the sleeve head hole is provided at one end of the circular shaft 7, a snap bead 3 is provided on the plane of the square tenon 2, a gear 12 is provided at the other end of the circular shaft 7, and a gear 12 is provided at the other end of the circular shaft 7. One end surface is provided with a round hole 4, and the other end of the round hole 4 is provided with a back cover 11. On the inner wall between the back cover 11 and the round hole 4, there is a ring-shaped protrusion that can mesh with each tooth of the gear on the round shaft 7. The ring gear 13 and the end surface of the back cover 11 are provided with a circular guide shaft 10, and the circular guide shaft 10 is movably matched with the circular guide hole 9 provided on the end surface of the gear 12. A spring 8 is arranged between the back cover 11 and the gear 12, the spring can separate the engaged gear 12 from the ring gear...

Embodiment 2

[0019] Such as Figure 5 , Image 6 As shown, one end of the circular shaft 7 is provided with a hexagonal prismatic tenon 2 connected to the sleeve head hole, and a snap bead 3 is provided on the plane of the tenon 2; the other end of the circular shaft 7 is provided with a gear 12; One end face of the round hole 4 is provided with a round hole 4, and the other end of the round hole 4 is provided with a back cover 11, the back cover 11 is connected with the end face of the inner ring gear by a plurality of screws 15, and the end face of the back cover 11 is provided with a circular guide hole 9, which is connected to the gear The round guide shaft 10 that is provided with on the end face is movable fit. On the inner wall between the bottom cover 11 and the circular hole 4, there is an inner ring gear 13 which protrudes annularly and can mesh with each tooth of the gear on the circular shaft 7. A spring 8 is arranged between the bottom cover 11 and the gear 12, and the spring...

Embodiment 3

[0023] Such as Figure 7 , Figure 8 As shown, one end of the round shaft 7 is provided with a square tenon 2 connected to the sleeve head hole, and a snap bead 3 is provided on the plane of the square tenon 2; the other end of the round shaft 7 is provided with three gears with the same spacing and the same number of teeth. Gear 12; a round hole 4 is provided on one end of the handle 1, and a back cover 11 is provided at the other end of the round hole 4. On the inner wall between the back cover 11 and the round hole 4, there are three annular protruding inner ring gears 13, The three ring gears and the round shaft 7 have the same gear intervals and the same number of teeth, and the three ring gears 13 can mesh with the three gears respectively. A spring 8 is arranged between the bottom cover 11 and the gear 12. The spring can The gear 12 is meshed and separated from the ring gear 13, and the gear 12 is placed in three cylindrical cavities 14 that can idle beside the ring ge...

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Abstract

The invention discloses a ratchet spanner, aiming at providing a ratchet spanner, in which a loosening screw can be normally used even without a positive and negative adjusting button and the screw can be randomly unloaded tightly positively and negatively by a single hand with a small screwing angle. The ratchet spanner has advantages of large torsion force, small size, simple structure and easy processing and manufacturing. The ratchet spanner comprises a round shaft, gearwheels, annular gears and a spring. The working principle of the ratchet spanner is that: the method is applied in the ratchet spanner that the gearwheels and the annular gears, both of which have the same number of teeth, are adopted to mesh each tooth of the two gearwheels and the meshed teeth of the two gearwheels are separated axially; with this method, the work performance of the ratchet spanner is improved. The invention is applicable for fast unloading tightly the screws on various machineries, electronic equipment and apparatuses.

Description

technical field [0001] The invention relates to a hand tool for tightening and unloading bolts, especially a ratchet wrench used in an environment with large torque and small space. Background technique [0002] At present, the structure of the known ratchet wrench is composed of a square tenon, a ratchet, a pawl, a reversing button, a handle and the like. Because the teeth of the ratchet are thin, the pawl is small. Therefore, when the force is large, the teeth often jump, and even the ratchet teeth and pawls are damaged to affect the work. Such as Chinese patent ratchet wrench (200520042892.8), (02233593.5) and so on. As for the forward and reverse reversing, manual adjustment, loose bolts and ratchet, and defects such as many parts, high cost, and large volume, obstacles have also been set up for the wide application of ratchet wrenches. Contents of the invention [0003] In order to solve the drawbacks of the existing ratchet wrench, such as the adjustment of the cl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B13/46
Inventor 王宁生王宗孚
Owner 王宁生
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