CN205703901U - A kind of Retchet gear type adjustable wrench - Google Patents

Abstract

The utility model provides a ratchet adjustable wrench, which is characterized in that it comprises: a handle; a head, the lower end of which is fixed on the handle, and the upper end includes a fixed part with fixed jaws and a movable jaw with movable jaws. There is a ratchet rack at the bottom of the movable part; the adjustment and fixing device is installed on the fixed part and is located below the ratchet rack, including pawls, shaft pins, springs and levers; the bottom end of the ratchet is rotatable through the shaft pins fixed on the fixed part, the spring bears against the pawl from the oblique lower side of the pawl, so that the top of the pawl is stuck in the tooth groove of the ratchet rack, forming a one-way anti-return control that the movable part can only move towards the fixed jaw Structure; the driving rod is arranged on the ratchet, and the spring can be pressed down by pressing the driving rod to drive the ratchet, so that the top of the ratchet is separated from the tooth groove of the ratchet rack. The utility model has the advantages of simple structure, convenient use, fast adjustment speed, and can effectively improve work efficiency.

Description

A ratchet adjustable wrench

technical field

The utility model belongs to the field of wrenches, in particular to a ratchet adjustable wrench.

Background technique

In industrial production, the traditional open-end wrench and adjustable wrench have been widely used. Compared with the open-end wrench, which can only be applied to the corresponding hexagonal nut, the adjustable wrench can adjust the width of the opening to be suitable for different sizes. nuts. However, in daily use, it is found that the current adjustable wrench uses the screw to drive the rack to adjust the size of the opening, and the adjustment speed is too slow. When it is necessary to frequently replace nuts of different sizes, the efficiency is relatively low; When using a wrench, you need to adjust the opening size to a size suitable for the nut. If the adjustment opening is too large, it will not only slip off easily when tightening or loosening the nut, but also deform the corners of the nut and damage the nut; if the opening size is adjusted too small , will make the wrench and the nut fit too tightly, making it difficult to pull out and change positions. Some open-ended wrenches have scales marked on the surface of the moving track to help users adjust to a suitable opening size, but this requires the user to know the size of the nut and the corresponding opening size of the wrench, which is still very inconvenient to use.

Contents of the invention

Aiming at the deficiencies in the prior art, the utility model provides a ratchet adjustable wrench.

In order to achieve the above object, the utility model adopts the following technical solutions:

A ratchet-type adjustable wrench, characterized in that it comprises: a handle; a head, the lower end of which is fixed on the handle, and the upper end includes a fixed part provided with fixed jaws and a movable part provided with movable jaws, the There is a ratchet rack at the bottom of the movable part; the adjustment and fixing device is installed on the fixed part and is located below the ratchet rack, including a ratchet, a shaft pin, a spring and a lever; the bottom end of the ratchet passes through the shaft pin It is rotatably fixed on the fixed part, and the spring bears against the pawl from the obliquely lower side of the pawl, so that the top of the pawl is stuck in the tooth groove of the ratchet rack, forming a control mechanism that the movable part can only move towards the fixed jaw. One-way anti-reverse structure; the lever is arranged on the pawl, and the spring can be pressed down by pressing the lever to drive the pawl, so that the top of the pawl is separated from the tooth groove of the ratchet rack.

In order to optimize the above technical solutions, the specific measures taken also include:

The tooth groove shape of the ratchet rack is triangular.

When the movable part approaches the fixed part from the outside, the jaw widths corresponding to the pawls being stuck in different tooth grooves are 24mm, 21mm, 18mm, 16mm, 13mm, 10mm, and 8mm in sequence.

The movable part is provided with a chute, the fixed part is provided with a guide rail matching the chute, the ratchet bar is arranged under the chute, and the fixed part is provided with a ratchet bar which can accommodate the chute below the guide rail. the holding tank.

The fixing part is provided with a mounting groove for installing and adjusting the fixing device on the bottom surface of the containing groove. At the corner on one side of the bottom end of the groove, the spring is fixed on the oblique waist connected to the corner on the other side, and is vertically supported on the side of the ratchet; the outer surface of the ratchet bottom is set as a circular shaft, and the corresponding The corners of the mounting slots are set to match the rounded corners.

Compared with the prior art, the utility model changes the adjustment mode of the traditional movable wrench screw rack into the adjustment mode of ratchet and pawl. The utility model has the advantages of simple structure, convenient use, fast adjustment speed, and can effectively improve work efficiency.

Description of drawings

Accompanying drawing 1 is the overall structural representation of the utility model.

Accompanying drawing 2 is the structural representation of the utility model head.

The reference signs are: handle 1, head 2, fixed part 3, guide rail 31, accommodating groove 32, movable part 4, ratchet rack 41, chute 42, adjusting and fixing device 5, pawl 51, shaft pin 52 , Spring 53, lever 54, mounting groove 6, jaw width L.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in further detail.

The ratchet adjustable wrench shown in Figure 1 includes a handle 1 and a head 2, the lower end of the head 2 is fixed on the handle 1, which can be an integrated design, and the upper end includes a fixed part 3 with a fixed jaw and a set. There is a movable part 4 with movable jaws, and the bottom of the movable part 4 is provided with a ratchet bar 41, and the tooth groove shape of the ratchet bar 41 can be designed as a triangle, more specifically a right triangle.

Further specifically referring to the partial schematic diagram shown in accompanying drawing 2, it also includes an adjustment and fixing device 5, which is installed on the fixing part 3 and is located below the ratchet rack 41, including a pawl 51, a shaft pin 52, a spring 53 and a shift lever 54; The bottom end of the ratchet 51 is rotatably fixed on the fixed part 3 through the shaft pin 52, and the spring 53 bears against the ratchet 51 from the obliquely lower side of the ratchet 51, so that the top end of the ratchet 51 is stuck in the tooth groove of the ratchet rack 41 , forming a one-way anti-reverse structure that controls the movement of the movable part 4 only towards the direction of the fixed jaw; the driving rod 54 is arranged on the pawl 51, and the spring 53 can be pressed down by pressing the driving rod 54 to drive the pawl 51 to make the pawl 51 top breaks away from the tooth groove of ratchet bar 41.

The moving mode of movable part 4 can be realized by the design of chute-guide rail, and movable part 4 is provided with chute 42, and fixed part 3 is provided with guide rail 31 that matches with chute 42, and ratchet bar 41 is arranged on Below the chute 42, the fixed part 3 is provided with the accommodating groove 32 that can accommodate the ratchet bar 41 below the guide rail 31, and the movable part 4 slides on the guide rail 31 by the chute 42, and the ratchet bar 41 also moves together, and the accommodating The slot 32 can play a good accommodation role when the ratchet bar 41 is moved and fixed, that is, it will not hinder the sliding of the movable part 4 and can play a good protective role.

Further, the fixing part 3 can be provided with a mounting groove 6 for installing the adjusting and fixing device 5 on the bottom surface of the accommodation groove 32. The longitudinal section of the mounting groove 6 is an inverted trapezoid, that is, the bottom edge of the upper end is longer, and the bottom edge of the lower end is shorter. , its upper end opening communicates with the accommodation groove 32, and the bottom end of the ratchet 51 is embedded in the corner of the bottom side of the mounting groove 6, that is, the angle between the shorter bottom edge and the waist farther away from the fixed jaw, and Spring 53 is fixed on the oblique waist that links to each other with the corner on the other side, promptly on the waist that is closer to fixed jaw, vertically supports on the side of ratchet 51; The corners of the corresponding mounting groove 6 are also set to match the rounded corners. This design makes the rotation of the ratchet 51 without resistance, and the round axis coincides with the rounded corners, increasing the support of the mounting groove 6 to the bottom of the ratchet 51. area, improve the stability of the pawl 51 work.

The wrench uses the principle of one-way transmission of ratchet and ratchet, and the principle of reverse locking to fix the opening position. The size of the opening is adjusted by moving the ratchet bar 41 so that different tooth grooves cooperate with the pawl 51 . Compared with the stepless adjustment of the traditional adjustable wrench, the ratchet adjustable wrench adopts stepwise adjustment of the opening size for the size of the commonly used nuts, so that it can be quickly and accurately adjusted to the appropriate opening size. The specifications of commonly used nuts and open-end wrenches are as follows:

Nut/M Dimensions Across Flats of Nut Head S Open end wrench size S M5 8 8 M6 10 10 M8 13 13 M10 16 16 M12 18 18 M14 twenty one twenty one M16 twenty four twenty four M18 27 27 M20 30 30

You can choose M5-8, M6-10, M8-13, M10-16, M12-18, M14-21, M16-24, which are 7 commonly used nut opening sizes, which are graded adjustment targets, and the design is suitable for these 7 commonly used nuts. The ratchet adjustable wrench, that is, when the movable part 4 approaches the fixed part 3 from the outside, the pawl 51 is stuck in different tooth grooves, and the corresponding jaw width L is 8, 10, 13, 16, 18, 21, 24mm , where the jaw width L is the vertical distance between the fixed jaw and the movable jaw, that is, the opposite side dimension of the matching nut head. If you need to expand the range, you only need to increase the number of slots of the ratchet bar 41.

When in use, the ratchet 51 is stuck in the tooth groove under the elastic force of the spring 53, and the ratchet 51 and the tooth groove are in a one-way locked state and can be used normally. When the opening needs to be adjusted to a small size, the movable part 4 is directly pushed toward the side of the fixed jaw, and under the action of the driving force, sliding occurs between the tooth groove and the pawl 51, and the ratchet bar 41 is driven toward the side of the fixed jaw 3 move. When the opening needs to be enlarged, it is necessary to press the lever 54 to drive the pawl 51 to press down the spring 53, so that the top of the pawl 51 is disengaged from the tooth groove of the ratchet rack 41, and then the movable jaw is pushed outward to a suitable position. size.

The above are only preferred implementations of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the thinking of the utility model all belong to the scope of protection of the utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims (5)

1. a Retchet gear type adjustable wrench, it is characterised in that including:

Handle (1)；

Head (2), this head (2) lower end is fixed on handle (1), and upper end includes the fixed part (3) being provided with regular jaw and is provided with the movable part (4) of moving jaw, and described movable part (4) bottom is provided with ratchet bar (41)；

Regulation fixing device (5), is arranged on described fixed part (3), is positioned at the lower section of ratchet bar (41), including ratchet (51), pivot pin (52), spring (53) and driving lever (54)；The bottom of described ratchet (51) is removably secured on fixed part (3) by pivot pin (52), described spring (53) withstands ratchet (51) from the obliquely downward of ratchet (51), make ratchet (51) top be stuck in the teeth groove of ratchet bar (41), formed and control the unidirectional non-return structure that movable part (4) only can move towards regular jaw direction；Described driving lever (54) is arranged on ratchet (51), can be depressed by spring (53) by pressing driving lever (54) band pawl (51), make ratchet (51) top depart from from the teeth groove of ratchet bar (41).

2. a kind of Retchet gear type adjustable wrench as claimed in claim 1, it is characterised in that: the slot form of described ratchet bar (41) is triangle.

3. a kind of Retchet gear type adjustable wrench as claimed in claim 1, it is characterized in that: described movable part (4) is when lateral fixed part (3) is close, and ratchet (51) is stuck in different teeth groove the width of jaw (L) of correspondence and is followed successively by 24mm, 21mm, 18mm, 16mm, 13mm, 10mm, 8mm.

4. a kind of Retchet gear type adjustable wrench as claimed in claim 1, it is characterized in that: described movable part (4) is provided with chute (42), described fixed part (3) is provided with the guide rail (31) matched with chute (42), described ratchet bar (41) is arranged on chute (42) lower section, and fixed part (3) is provided with the storage tank (32) that can house ratchet bar (41) in described guide rail (31) lower section.

5. a kind of Retchet gear type adjustable wrench as claimed in claim 4, it is characterized in that: described fixed part (3) is provided with the mounting groove (6) installing regulation fixing device (5) in the bottom surface of storage tank (32), the longitudinal cross-section of described mounting groove (6) is inverted trapezoidal, its upper end open connects with storage tank (32), the bottom of described ratchet (51) is embedded in the corner of mounting groove (6) side, bottom, described spring (53) is fixed on the oblique waist being connected with opposite side turning, and vertical support is in the side of ratchet (51)；Ratchet (51) bottom outer surface is set to circular shaft shape, and corresponding mounting groove (6) turning is set to the fillet agreed with therewith.