Ratchet wheel-tooth dervice of microangle retainer

Abstract

A ratchet wheel-tooth mechanism for microangle drive of spanner features that a drive part is arranged in the hole of spanner head and a ratchet wheel and a detent are respectively arranged on said drive part and spanner head for driving the drive part by the spanner. It has at least two blocks overlapped mutaully and each block has a locating part. Its advantages are microangle operation and high torque.

Description

[technical field] [0001] The invention relates to a wrench, especially a wrench with a micro-angle locking device. [Background technique] [0002] At present, the ratchet wrench can be classified into two types according to the way of locking, which can be roughly divided into two kinds: the clamping system and the clamping system of rollers. Structural form, among them, the endless roller clamping structure, that is, between the driving parts in the wrench head, the rollers are used to clamp with the depth of the groove. Such a structure is because the inner diameter of the wrench head is clamped by the cylindrical surface or The smooth surface of the driving part is very easy to cause sliding, and the clamping cannot be reliably implemented, that is, the torque it can resist is very limited, so there is still the existence of the traditional segmented clamping structure. This segmented clamping structure, That is to say, the outer diameter of the driving part or the inner...

AI Technical Summary

Problems solved by technology

[0006] And China Taiwan No. 90204835 "improvement of the switching structure of the ratchet wrench" new patent case, it has structures such as a locking block, a dial, a spring and a positioning shrapnel, and is a structural form that indirectly promotes the locking block to drive the ratchet; China Taiwan No. 91201291 "Structure Improvement of Reversing Ratchet Wrench" new patent case, which is a ratchet block is a reversing switch through a toggle piece and the push device on the toggle piece pushes the ratchet block. To the actuation structure; China Taiwan No. 90202204 "Ratchet Wrench Structure Improvement" new patent case, which has two abutment elements at the bottom of a gear, the abutment elements are held by elastic elements respectively, and are actuated by the reversing button Abutting against the elements to support the teeth to form different direction changes; China Taiwan No. 90203161 "Structure Improvement of Ratchet Wrench" new patent case, which is that the bottom of the ratchet teeth is additionally equipped with a top part made of a spring top and a shifting block. Indirect toggle; China Taiwan No. 89221769 "Ratchet Wrench Structural Improvement" new patent case, the teeth are made of two resisting parts with a steering block and two elastic bodies, so that the steering block can be driven by the dialing resisting parts. teeth to achieve the function of indirectly driving the ratchet; China Taiwan No. 89219526 "Improved Ratchet Reversible Wrench" new patent case, which is a steering control structure with a top brake block in a pulling unit to form an indirect control structure form; these structures all use very complicated reversing devices or structures to drive a single detent block to achieve the purpose of reversing, but not only the cost is high, but also the structural form of the clamping system is a form driven by elastic clamping, and the elasticity Considering the ease of reversing, the strength of the supporting force is very insufficient, so there are often missing teeth. What's more, there is no relevant structure for the small angle requirements of fine teeth. design, so there is also a need for improvement

[0007] For the reversing setting, it is set in the structure in the driving member, that is, as Figure 17 As shown, the driving clamping block 95 is arranged in the driving member 93, and such a structure is that the single clamping block 95 clamps the accommodating groove 920 of the head 92 opposite to the driving wrench 10, and the tooth pitch it jumps remains the same. It cannot meet the needs of small-angle actuation of fine teeth, so when the number of teeth on the wall surface of the accommodation tank 920 is forty-five teeth, the angle driven by the jumping teeth is at least four degrees, and it cannot be actuated for small angles; For the structure of the ratchet wrench driven by the small-angle clamping, it is like the new patent case of Taiwan No. 88213382 "Improved structure of the high-torque ratchet wrench". Different brake blocks can be clamped at a small angle to achieve the function of clamping at a small angle. Although this structure can meet the needs of small-angle high-torque parts, it still has many shortcomings, such as:

[0008] 1. It is a one-way clamping structure: that is, its setting is a one-way structure, and the direction of the wrench must be replaced when changing the direction. Therefore, if there is a need for reversing, it can only be implemented when the driving part is On a hollow ratchet wrench, this structure can be used for displacement in the direction of the wrench. If it is used for a socket wrench, it is commonly known as a D-head wrench. Since it can only be used in one direction, this type of wrench That is, it cannot meet the needs of changing upwards, so there is also a need for improvement

[0009] 2. High structural complexity: the multiple sets of detents are set at different positions on the head, which not only increases the area and volume of the head, but also requires two opposite grooves, which is labor-intensive and cost-intensive. High, in the assembly, it is more inconvenient, so it is necessary to improve

[0010] 3. There are also restrictions on the clamping angle: due to the limitation that the head cannot be expanded infinitely, the detent block can only be set in two or so settings according to the current state, and the clamping teeth of the outer diameter of the drive part are also limited. It cannot be too small, so the possibility of subdividing the jamming angle is relatively reduced, so its development is also greatly restricted

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