CN201346757Y - Improved ratchet wrench structure - Google Patents

Abstract

An improved ratchet wrench structure comprises a body, a sleeving piece sleeved with a tool head and an actuating piece for limiting the rotation direction of the sleeving piece, wherein a containing space is formed in the body, the containing space is provided with a wheel groove for arranging the sleeving piece and a shifting groove for arranging the actuating piece, ratchets which are oppositely meshed are respectively formed on the periphery of the sleeving piece and the corresponding surface of the actuating piece, the containing space consists of a first circle and a second circle, the first circle and the second circle form two staggered points which are oppositely staggered, the two staggered points are positioned between parallel axial lines of the first circle and the second circle, a tangent plane is respectively formed between the peripheral tangent points on the two sides of the first circle and the second circle, so that a conical clamping area is formed between the two tangent planes and the periphery of the sleeving piece, and tangent planes corresponding to the tangent plane space are formed on the outer peripheries of the two ends of the actuating piece; the preferred radius ratio of the first circle to the second circle is 1: 0.6-1.1, and the preferred ratio of the radius of the first circle to the distance between the parallel axes of the two circles is 1: 0.6-1.1. The utility model discloses promote rotatory torsion, increase of service life.

Description

Improved ratchet wrench structure

technical field

The utility model relates to a hand tool, in particular to an improved ratchet wrench structure with high rotational torque.

Background technique

The ratchet device is a kind of torsion function that can be used to lock the sleeve through the detent, so that the sleeve only has unilateral action and one-way idling. It is widely used in various wrenches and other hand tools to solve the problem of In the past, it was necessary to constantly remove the hand tool and re-engage it and turn it again to improve the convenience and speed of the hand tool operation. However, the traditional ratchet device simply uses the dotted line between the back edge of the catch and the inner edge of the dial groove. Contact, so most of its torque is borne by the engaging ratchet between the catch and the fitting, and therefore when the torsional force is less than the reaction force of the fitting, the ratchet on the catch and the fitting Tension displacement gaps and tooth skipping or chipping often occur on the surface, especially on small ratchet wrenches, because the tooth height of the ratchet is proportional to the diameter of the moving part and the fitting part, plus Due to the inevitable design tolerance and manufacturing error, the torque resistance value of the actual meshing tooth surface is far lower than the expected value. When the load falls on a few meshing ratchet teeth, it often jumps or collapses due to the inability to load, resulting in Its definite movement is poor, and its service life is shortened.

Also therefore in recent years the improvement of various ratchet devices still focuses on the promotion of torsion resistance, as shown in Figure 1, it is the existing high-torque ratchet wrench structure, this existing structure is mainly in the body 11 of the wrench ratchet device 10 A wheel groove 12 is formed, and a dial groove 15 is formed on the periphery of the wheel groove 12, wherein a fitting 20 with a series of ratchets 21 on the outer edge can be placed in the wheel groove 12, and a corresponding ratchet 21 is provided in the dial groove 15. The catch 25 of the ratchet 26, the catch 25 can be pushed against by the push unit 28 provided in the body 11, so that the catch 25 can be engaged with the corresponding ratchet 21 of the sleeve 20 by the ratchet 26 , and then control the unilateral action direction of the sleeve 20;

Further cooperation is shown in Fig. 1 and Fig. 2, although the above-mentioned existing structure utilizes the deep-cut shifting groove 15 to increase the thickness of the catch 25, so that one side of the catch 25 can be against the wall of the shifting groove 15, To locally improve its torque resistance value, but since the wheel groove 12 and the two sides of the shifting groove 15 intersect to form an inwardly convex bulge, and the two ends of the stopper 25 are flat end faces, so when the sleeve 20 When the force is greater than the supporting force of the occlusal surface of the ratchet 26, a displacement gap (as shown in Figure 2) will occur between the tooth surfaces, so that the catch 25 is pushed outward, causing the sleeve 20 to be in contact with the catch. The ratchets 21, 26 of the component 25 skip teeth or collapse, and the smaller the ratchet device 10 is, the more obvious it is, so it still cannot effectively overcome the problem of insufficient torque resistance.

In other words, due to the design problem of the existing ratchet device, the ratchet teeth must bear most of the torsion force, and once the ratchet teeth cannot be fully engaged due to tolerance or excessive torsion force, tooth skipping or collapse will occur. The tooth phenomenon not only affects the reliability of the action, but also shortens its service life. In order to reduce the occurrence of the above situation, it is necessary to further improve the precision of its manufacturing and processing, which will increase the difficulty of processing and defect rate, and increase its manufacturing cost.

Utility model content

The main technical problem to be solved by the utility model is to overcome the above-mentioned defects in the prior art, and provide an improved ratchet wrench structure, which can increase its rotational torque, prolong its service life, and further increase its economic benefits.

The technical scheme that the utility model solves its technical problem adopts is:

An improved ratchet wrench structure, which includes a body, a fitting for a set tool head, and a stopper that limits the rotation of the fitting, wherein a housing space is formed in the body, and the housing space has a setting The wheel groove of the sleeve and a pull groove for setting the catch, and the peripheral edge of the sleeve and the corresponding surface of the catch are respectively formed with ratchets that can be engaged with each other, wherein the accommodating space is formed by the first circle and the second circle. It is composed of circles, and there is an appropriate distance between the parallel axes of the first circle and the second circle, and the first circle and the second circle form two opposite intersecting points, and the two intersecting points are located between the first circle and the second circle. Between the parallel axes of the first circle and the second circle, a tangent plane is formed between the tangent points on both sides of the periphery, so that the two tangent planes and the peripheral edge of the sleeve form a pyramid-shaped clamping area, and the two ends of the detent The outer peripheral edge is formed with a cut surface corresponding to the cut surface of the accommodation space, and the catch member forms a pyramid-shaped clamping end between the two cut surfaces and the ratchet teeth, and the two clamping ends are correspondingly inserted between the accommodation space and the sleeve It is characterized in that: the preferred ratio of the radius of the first circle to the second circle is 1:0.6-1.1, and the preferred ratio of the radius of the first circle to the distance between the parallel axes of the two circles is 1: 0.6 ~ 1.1.

Through the design of the ratio of the radii of the first circle to the second circle and the ratio of the radius of the first circle to the distance between the parallel axes of the two circles, the rotational torsion force can be greatly improved, the tension displacement can be eliminated, and the dynamism can be improved.

In the aforementioned improved ratchet wrench structure, the optimum ratio of the radius of the first circle to the second circle is 1:0.96, and the optimum ratio of the radius of the first circle to the distance between the parallel axes of the two circles is 1:0.76.

In the aforementioned improved ratchet wrench structure, the cut surfaces on both sides of the first and second circles in the accommodating space are arc cut surfaces.

In the aforementioned improved ratchet wrench structure, the cut surfaces on both sides of the first and second circles in the accommodating space are straight cut surfaces.

In this way, through the specific realization of the aforementioned technical means of the utility model, when the fitting of the utility model is allowed to continue to rotate, the catch and the ratchet of the fitting can form a full-toothed occlusal state, so as to avoid the occurrence of ratchets. The phenomenon of tooth collapse can greatly increase its rotational torque, eliminate tension displacement, improve its dynamic performance, prolong its service life, and increase its added value and economic benefits.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic plan view of an existing ratchet wrench, which is used to illustrate the appearance and relative relationship of its constituent elements.

Fig. 2 is a partially enlarged schematic diagram of the engagement of the existing ratchet wrench.

Fig. 3 is a three-dimensional exploded schematic view of the ratchet wrench of the present invention.

Fig. 4 is a schematic diagram of the combination of the ratchet wrench of the present invention, in order to illustrate the formation state and relative relationship of the ratchet wrench of the present utility model.

Fig. 5 is a schematic diagram of the movement of the ratchet wrench of the utility model to toggle engagement.

Fig. 6 is a schematic diagram of the clamping action of the engagement of the ratchet wrench of the present invention.

Fig. 7 is a partially enlarged schematic diagram of the ratchet wrench of the present invention when it is engaged.

Explanation of symbols in the figure:

10 ratchet device 11 body

12 wheel slots 15 dial slots

20 sets of parts 21 ratchets

25 detents 26 ratchets

28 push unit 50 ratchet device

51 Body 52 Accommodating space

53 wheel slots 54 dial slots

56 first round 57 second round

58 facets 59 pinching areas

60 sets of parts 61 ratchets

65 detents 66 ratchets

67 facets 68 clamping ends

69 push unit R1 first circle radius

R2 Radius of the second circle L Distance between parallel axes of the first and second circles

X1 first circular axis X2 second circular axis

E1 first circle tangent point E2 second circle tangent point

F1 first circle tangent point F2 second circle tangent point

A, B intersection point

Detailed ways

The utility model is a high-torque ratchet device. As shown in FIG. 3 , the ratchet device 50 includes a body 51 , a set piece 60 for connecting a tool head, and a stop piece 65 that limits the turn of the set piece 60 , where the main body 51 is formed with an accommodating space 52, the accommodating space 52 has a wheel groove 53 for setting the sleeve 60 and a dial groove 54 for setting the catch 65, and the periphery of the sleeve 60 is in contact with the catch The corresponding surfaces of the component 65 are respectively formed with ratchets 61 and 66 that can be engaged relative to each other, so that the stopper 65 can be embedded and engaged with the fitting 60, so that the fitting 60 acts as a ratchet with unilateral action and one-way idling;

As for the detailed structure of the structure of the present utility model, please refer to FIGS. The preferred radius ratio of 57 is R1: R2 = 1: 0.6～1.1, wherein the optimum ratio is R1: R2 = 1: 0.96, and there is a distance between the parallel axes X1 and X2 of the first circle 56 and the second circle 57. Appropriate spacing L, the preferred ratio of the radius of the first circle 56 to the spacing L is R1:L=1:0.6～1.1, and the best ratio is R1:L=1:0.76, and the first circle 56 and the second circle The two circles 57 are formed with two oppositely staggered intersecting points A, B, the two intersecting points A, B are located between the parallel axes X1, X2 of the first circle 56 and the second circle 57, and the first circle 56 and the second circle A tangent plane 58 is formed respectively between the tangent points E1, E2 and F1, F2 of both sides of the periphery of the 57, and the tangent plane 58 can be a circular arc tangent plane or a straight line tangent plane, so that the two tangent planes 58 and the peripheral edge of the sleeve 60 form a pyramid-shaped pinch zone 59;

Furthermore, the outer peripheral edges of the two ends of the catch 65 are formed with cut surfaces 67 corresponding to the cut surfaces 58 of the accommodation space 52, and the catch 65 forms a pyramid-shaped clamping end 68 between the two cut surfaces 67 and the ratchet 66. The forcing end 68 can be correspondingly embedded in the clamping area 59 between the accommodation space 52 and the sleeve 60, and there is a pushing unit 69 propped between the accommodation space 52 and the periphery of the catch member 65 for pushing and locking The ratchet 66 of the piece 65 and the ratchet 61 of the fitting 60 keep the shape of engagement;

In this way, an improved ratchet wrench structure that can fully engage with teeth and prolong the service life is formed.

When the utility model is actually used, the functions and effects that can be produced are shown in Figures 5 to 7;

1. Increase its anti-torque force value: after the catch 65 of the ratchet device 50 is moved to one side and engages the sleeve 60, the clamping end 68 on the corresponding side of the catch 65 can be completely embedded in the sleeve 60 and In the clamping area 59 between the cut surfaces 58 of the accommodating space 52, the ratchets 66, 61 opposite to the catch piece 65 and the sleeve piece 60 can be completely engaged with each other, forming a fully toothed bite, and at the same time allowing the catch The cutting surface 67 of the moving part 65 is attached to the cutting surface 58 of the accommodating space 52, so that the torque resistance force of the locking part 65 can be evenly distributed on each ratchet 66 and the cutting surface 67, so that the torque resistance value can be greatly improved.

2. High dynamic performance: As mentioned above, when the fitting 60 is rotated under force, the clamping end 68 of the catch 65 will be driven by the ratchet 61 of the fitting 60, and the more it is moved by the accommodating space 52 Clamped by the clamping area 59, the gap between the sleeve 60 and the ratchet 61, 66 of the catch 65 can be completely eliminated, and the torsion resistance value can be improved again, while tension displacement or even tooth skipping or tooth collapse can be avoided. Phenomenon, and improve the dynamic performance when it is finally tightened.

3. Extend the service life: when the sleeve 60 rotates, it can effectively eliminate the gap, so the ratchets 61 and 66 between the sleeve 60 and the catch 65 can be completely engaged, which can effectively prevent tooth jumping And the phenomenon of tooth decay, effectively prolonging its service life.

4. High economic benefit: especially since the fitting part 60 and the detent part 65 can be further clamped during the operation process, and can produce the effect of automatic compensation, so it is not necessary to deliberately require the precision of the parts as in the prior art, so it can be Reducing its processing difficulty and further reducing the occurrence of defective products can invisibly reduce its production costs and improve the competitiveness and economic benefits of its products.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model, All still belong to within the scope of the technical solution of the utility model.

In summary, the utility model fully meets the needs of industrial development in terms of structural design, practicability and cost-effectiveness, and the disclosed structure also has an unprecedented innovative structure, novelty, creativity and practicability, and meets the needs of industrial development. According to the requirements of the new patent requirements, the application is filed in accordance with the law.

Claims (4)

1, a kind of improved ratchet spanner structure, it includes a body, the brake that the engagement piece of one socket tool heads and a restriction engagement piece turn to, wherein be formed with an accommodation space in the body, this accommodation space has one and the race and of engagement piece is set for the allocating slot that brake is set, and the engagement piece periphery is formed with the ratchet that can mesh relatively respectively with the corresponding surface of brake, wherein accommodation space is made up of first circle and second circle, and first circle and second is justified maintains a suitable spacing between paralleling to the axis, and first circle round-formedly has two relative cross-points that interlock with second, this two cross-point is positioned between paralleling to the axis of first circle and second circle, be formed with a tangent plane respectively between the periphery point of contact, both sides of first circle and second circle, make this two tangent plane and engagement piece periphery form a pyramidal folder and compel the district, moreover the outer peripheral edges at brake two ends are formed with the tangent plane of corresponding accommodation space tangent plane, and brake forms pyramidal folder and compels end between this two tangent plane and ratchet, and two folders are compeled the corresponding respectively both sides folder that is embedded between accommodation space and engagement piece of end and compeled in the district; It is characterized in that:

This first circle is 1: 0.6～1.1 with this second radius of a circle ratio, and the ratio of this first radius of circle and the two round spacings that parallel to the axis is 1: 0.6～1.1.

2, improved ratchet spanner structure according to claim 1 is characterized in that: described first circle is 1: 0.96 with the second radius of a circle ratio, and the ratio of described first radius of circle and the two round spacings that parallel to the axis is 1: 0.76.

3, improved ratchet spanner structure according to claim 1 is characterized in that: the both sides tangent plane of described first and second circle of described accommodation space is the circular arc tangent plane.

4, improved ratchet spanner structure according to claim 1 is characterized in that: the both sides tangent plane of described first and second circle of described accommodation space is the straight line tangent plane.

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