WO2016145709A1

WO2016145709A1 - Insulating ratchet wrench

Info

Publication number: WO2016145709A1
Application number: PCT/CN2015/077253
Authority: WO
Inventors: 周少岐
Original assignee: 周少岐
Priority date: 2015-03-17
Filing date: 2015-04-23
Publication date: 2016-09-22
Also published as: CN104708569A

Abstract

An insulating ratchet wrench comprises a wrench body (10), a ratchet (20) and a locking mechanism. The wrench body (10) is provided with an annular through hole (15), and the ratchet (20) is arranged in the through hole (15) and rotates about the axial direction of the through hole (15). The wrench body (10) is further internally provided with a groove body (40) for setting the locking mechanism. The locking mechanism comprises a locking block (31) and a spring (32). One end of the spring (32) is abutted against one end of the locking block (31), and the other end is abutted against the end side wall of the groove body (40). The end not abutted against the spring (32), of the locking block (31) is provided with locking teeth (311), and the locking teeth (311) mesh with the ratchet (20). An insulating layer (19) is arranged outside the wrench body (10). According to the design of arranging an insulator outside the wrench, it is guaranteed that workers can safely use the wrench to work even in the electriferous environment, the safe production purpose is achieved, and the production efficiency is improved.

Description

Insulated ratchet wrench

Technical field

The present invention relates to the field of machine tools, and in particular to a wrench.

Background technique

Most of the existing wrenches are metal surfaces and have no insulation. If the user accidentally uses them for charging, the user is easily accidentally exposed to electric shock and is at work. Therefore, the wrench cannot be used for charging, and the range of use of the wrench is greatly limited. In addition, the ratchet teeth of the conventional ratchet wrench are 45°. For this structure, on the one hand, the damping accuracy is not high and the strength is insufficient; on the other hand, the friction coefficient during idling is large, which causes the idling to be poor and affects the service life of the wrench.

Summary of the invention

It is an object of the present invention to provide an insulated ratchet wrench that addresses one or more of the above prior art problems.

According to an aspect of the present invention, an insulating ratchet wrench is provided, including a wrench body, a ratchet wheel, and a locking mechanism; the wrench body is provided with an annular through hole, the ratchet wheel is disposed in the through hole, and rotates around the axial direction of the through hole; A slot body for providing a locking mechanism is further provided. The locking mechanism includes a locking block and a spring. One end of the spring abuts against one end of the locking block, and the other end abuts against an end side wall of the slot body, and the locking block does not abut the spring. One end of the joint is provided with a locking tooth, and the locking tooth is engaged with the ratchet; the outer portion of the wrench body is provided with an insulating layer. This design ensures that workers can safely use the wrench even when they are in a charged environment by providing an insulator on the outside of the wrench, which not only achieves the purpose of safe production, but also improves production efficiency.

In some embodiments, the ratchet includes a cylindrical wheel body and ratchet teeth uniformly disposed in an outer circumferential direction thereof, the ratchet teeth including two intersecting first and second faces, the first face and the second face are both opposite to the wheel body The cylinder faces intersect, and the intersections at the intersection are the first section and the second section, respectively; the first surface is perpendicular to the first section, and the angle formed by the second plane and the second section is 30° to 60° . This design differs from conventional wrenches (the two sides of the ratchet tooth cross-section are equal in length and at an angle of 45°). The design of the first surface perpendicular to the first cutting surface effectively improves the accuracy and strength of the damping when the ratchet load is rotated; the angle between the second surface and the second cutting surface is 30° to 60°, so that the ratchet When idling, the friction coefficient of the ratchet and the locking block is reduced, which makes the idling smoother and prolongs the service life of the wrench.

In some embodiments, one end of the locking block in contact with the ratchet is a concave arcuate surface that cooperates with a circumferential arcuate surface of the ratchet; the locking teeth are evenly distributed on the concave arcuate surface. The end of the locking block in the conventional ratchet wrench is flat, and the teeth distributed at the ends thereof are also flat. When the shape locking block is engaged with the ratchet, when the ratchet load is rotated, the teeth at the end of the locking block are locked. Only one or two of the teeth are concentrated in the force, which is likely to cause damage to the teeth. In the present invention, the section of the locking block is designed as a concave arc surface that cooperates with the ratchet, so that each locking tooth of the end of the locking block is completely engaged with the ratchet at any time, when the ratchet load rotates, The locking teeth all play a damping role, thus avoiding the concentrated force of a few locking teeth, thereby avoiding the damage of the locking teeth and prolonging the service life of the wrench.

In some embodiments, the trough body includes a first trough for placing a locking block and a second trough for placing a spring; the first trough is in communication with the through hole and is also in communication with one end of the second trough; the spring is not with the locking block One end of the abutment abuts the end wall of the second slot that is not in communication with the first slot; the locking block is displaceable in the radial direction of the first slot, and the first slot limits the lateral displacement of the locking block. This design defines the movement trajectory of the locking block, reduces the lateral displacement of the locking block when the ratchet load is rotated, improves the damping precision, and improves the damping strength.

In some embodiments, the wrench body includes a first piece, a second piece, and a socket; the socket is disposed between the first piece and the second piece, and the first piece and the second piece are fixed and clipped Holding the slot; the first slot and the second slot are both open on the slot. This design improves production efficiency and reduces energy consumption compared to conventional forging processes.

In some embodiments, the through hole includes a first through hole, a second through hole, and a third through hole that are coaxial and mutually penetrated; the first through hole is disposed on the first piece, and the second through hole is disposed on the second piece The third through hole is disposed on the slot; the ratchet teeth are evenly distributed in the middle of the outer circumference of the wheel and are located in the third through hole; the two ends of the wheel body are respectively disposed in the first through hole and the second through hole The inner diameters of the first through hole and the second through hole are both smaller than the outer diameter of the ratchet, and the inner diameter of the third through hole is larger than the outer diameter of the ratchet. This design defines the rotation path of the ratchet to prevent the ratchet from falling under stress and prolonging the life of the wrench.

In some embodiments, one end of the locking block abutting the spring is provided with a receiving groove; and one end of the spring abutting the locking block is disposed in the receiving groove. In this design, the abutting position of the two ends of the spring is fixed to prevent the spring from sliding when subjected to the force, thereby improving the overall precision and prolonging the service life of the wrench.

In some embodiments, the insulating layer is an injection molded insulating material. This design gives the wrench a high degree of insulation and a strong, wear-resistant insulation that maximizes safety.

In some embodiments, the ratchet includes a cylindrical wheel body and ratchet teeth uniformly disposed in an outer circumferential direction thereof, the ratchet teeth including two intersecting first and second faces, the first face and the second face are both opposite to the wheel body The cylinders intersect, and the intersections at the intersection are the first section and the second section, respectively; the first plane is perpendicular to the first section, and the angle formed by the second section and the second section is 30°, the second Face and second face When the angle is 30°, the damping strength is the largest, and the wear of the locking block and the ratchet can be effectively reduced, and the service life of the product is improved.

DRAWINGS

1 is a schematic view showing an assembly structure according to an embodiment of the present invention;

2 is a schematic view showing an assembly structure according to another embodiment of the present invention;

3 is a schematic cross-sectional view showing an assembly structure according to an embodiment of the present invention;

Figure 4 is a schematic view and detailed view of the ratchet structure;

Figure 5 is a schematic structural view of a socket;

Fig. 6 is a schematic structural view of a locking block.

detailed description

The invention will now be described in further detail with reference to the drawings of the specification.

The insulated ratchet wrench disclosed in the present invention, as shown in FIG. 1, includes a wrench body 10, a ratchet 20, and a locking mechanism. The wrench body 10 is provided with an annular through hole 15 . The through hole 15 may be a penetrating wrench body 10 or may be non-penetrating. The through hole 15 functions to cover the nut to be operated. In addition, the ratchet 20 is embedded in the through hole 15 and rotates around the axial direction of the through hole. In other words, the ratchet 20 is placed in the through hole 15 without being detached from the through hole 15, but can be freely rotated therein; The body 10 is further provided with a groove body 40 for providing a locking mechanism. Specifically, the locking mechanism includes a locking block 31 and a spring 32. One end of the spring 32 abuts one end end of the locking block 31, and the other end is connected to the groove body 40. The end side wall abuts, and one end end of the locking block 31 not abutting the spring 32 is provided with a locking tooth 311, and the locking tooth 311 is engaged with the ratchet wheel 20; the wrench body 10 is provided with an insulating layer 19 outside.

Regarding the shape of the groove 40, various designs can be given according to the shape and size of the locking block 31 and the spring 32. The function of the groove 40 is to provide space for placing the locking block 31 and the spring 32 while ensuring that the locking block 31 can be radially The displacement, in turn, limits the lateral displacement of the locking block 31. Therefore, the tank 40 can also be a simple rectangular groove as shown in Figs. It should be noted that the "guaranteed locking block 31 can be radially displaced" and "restricted lateral displacement of the locking block 31", which means that the spring 32 will push the locking block 31 upward during the rotation of the ratchet 20 from the idling to the load. The ratchet 20, likewise, during the rotation of the ratchet 20 from the load to the idling, the ratchet teeth 22 on the ratchet 20 will push the locking block 31 towards the spring, and we define the displacement of the locking block 31 between the ratchet 20 and the spring 32. In the meantime, in view of the fact that one end of the locking block 31 is engaged with the ratchet 20, when the ratchet 20 is rotated, a force is also applied to the locking block 31, so that the locking block 31 has a follow-up The possibility of rotation, which is the above-mentioned "lateral displacement". In fact, in order to provide the ratchet 20 with high-strength, high-stability damping when the load is rotated, the locking block 31 must be strictly controlled. The magnitude of the displacement, in general, the groove 40 is not too wide and can provide a smooth radial displacement of the locking block 31.

In addition, the tank body 40 can also be structurally refined. As shown in FIG. 1, the tank body 40 includes a first groove 41 for placing the locking block 31 and a second groove 42 for placing the spring 32. The first slot 41 has one end communicating with the through hole 15 and the other end communicating with one end of the second slot 42. One end of the spring 32 abuts the locking block 31, and the other end and the second slot 42 are not connected to the first slot 41. One end of the connected groove wall abuts. The "one end groove wall in the second groove 42 that is not in communication with the first groove 41" as referred to herein means the side wall of the second groove 42 away from the one end end of the first groove 41.

As shown in FIG. 3 , the wrench body 10 is provided with an annular through hole 15 , and the ratchet 20 is embedded in the through hole 15 . For the design of the wrench body 10 , the wrench body 10 includes a first piece 11 , The second piece 12 and the socket 13 are provided. Wherein, the socket 13 is located between the first piece 11 and the second piece 12, and the first piece 11 and the second piece 12 are fixed to hold the seat 13; the first piece 11 and the second piece The connection of 12 can be riveting or a combination of bolts and nuts.

On the basis of this structure, the first groove 41 and the second groove 42 are both opened on the housing 13. In other words, the seat 13 functions to place the locking block 31 and the spring 32. Therefore, the shape of the housing 13 does not have to be identical to the first tab 11 or the second tab 12 as long as it satisfies its technical function, that is, it can accommodate the locking block 31 and the spring 32, and can realize the locking block 31. And the function of the spring 32 is sufficient. More recently, the housing 13 does not have to be a separate part, it may also be integrally formed with the first piece 11 or the second piece 12. In other words, the present technical solution does not emphasize that the first piece 11, the second piece 12, and the socket 13 must be three separate components, and the description is only for the sake of clarity.

4, regarding the structure of the ratchet 20, the ratchet 20 includes a cylindrical wheel body 21 and ratchet teeth 22 evenly distributed in the outer circumferential direction thereof. The ratchet teeth 22 include two intersecting first faces 222 and second faces 221, each of which intersects the cylindrical surface of the wheel body 21, and the intersecting faces are the first cut faces 212 and Second section 211. The angle B between the first surface 222 and the first cutting surface 212 is a right angle, and the angle A formed by the second surface and the second cutting surface 211 is 30° to 60°. In actual production, the ratchet includes a cylindrical wheel body and ratchet teeth uniformly distributed in the outer circumferential direction thereof, the ratchet teeth including two intersecting first faces and second faces, the first face and the second face are both opposite to the wheel body The cylinders intersect, and the intersections at the intersection are the first section and the second section, respectively; the first surface is perpendicular to the first section, and the angle formed by the second plane and the second section is 30°, the second side When the angle formed by the second cutting surface is 30°, the damping strength is the largest, and the wear of the locking block and the ratchet in contact with each other can be effectively reduced, and the service life of the product is improved. It should be noted that the ratchet teeth 22 are evenly distributed in the outer circumferential direction of the wheel body 21, that is, the ratchet teeth 22 are evenly distributed in the circumferential direction of the column wall of the wheel body 21. Further, the so-called "uniform" means that all the ratchet teeth 22 are parallel to each other, and the pitches of the adjacent two ratchet teeth 22 are the same, and the cross-sectional shapes and sizes of the adjacent two ratchet teeth 22 are the same.

The ratchet teeth 22 are evenly distributed in the middle portion of the outer circumferential direction of the wheel body 21, in other words, the ratchet wheel 20 is not provided in the circumferential direction of both ends of the wheel body 21. The design is such that the outer diameter of both ends of the ratchet 20 is smaller than the outer diameter of the middle portion. In addition, as shown in FIG. 3, the through hole 15 includes a first through hole 151, a second through hole 152, and a third through hole 15 which are coaxial and mutually penetrated. The through hole 15 is embodied by the first through hole on the first piece 11 and the second through hole 152 is formed on the second piece 12. The third through hole 15 is embodied in the seat 13. The inner diameters of the first through hole 151 and the second through hole 152 are both smaller than the outer diameter of the ratchet 20, and the inner diameter of the third through hole 15 is larger than the outer diameter of the ratchet 20. According to this configuration, the two ends of the wheel body 21 are respectively disposed in the first through hole 151 and the second through hole 152, so that the ratchet wheel 20 is pivotally connected to the first through hole 151 and the second through hole 152, that is, both ends of the ratchet wheel 20 The first through hole 151 and the second through hole 152 can be rotated about the central axis of the ratchet, thereby causing the ratchet teeth 22 to rotate in the third through hole 15.

According to FIG. 6, one end of the locking block 31 in contact with the ratchet 20 is a concave arc surface which cooperates with the circumferential arc surface of the ratchet 20; the locking teeth 311 are evenly distributed on the concave arc surface. on. As used herein, "coinciding" means that the radius of the concave arcuate face of the end of the locking block 31 is the same as the radius of the ratchet 20 or slightly larger than the radius of the ratchet 20. Thus, when the locking block 31 and the ratchet 20 are engaged, each of the locking teeth 311 at the end of the locking block 31 is engaged with the ratchet teeth 22. Designed to ensure that each of the locking teeth 311 provides damping to the ratchet 20 as the ratchet 20 is loaded.

In order to prevent the spring from sliding when the force is applied, the overall precision is improved. As shown in FIG. 2, one end of the locking block 31 abutting against the spring 32 is provided with a receiving groove 32; one end of the spring 32 abutting the locking block 31 is disposed. It is accommodated in the slot 32.

In addition, as for the material of the insulating layer 19, it is an injection-type insulating material, and specifically, reinforced nylon can be used, so that the insulating layer of the wrench is more firm and wear-resistant, and the safety factor is maximized.

The above description is only a preferred mode of the present invention, and it should be noted that various modifications and improvements can be made by those skilled in the art without departing from the inventive concept. Within the scope of protection.

Claims

An insulating ratchet wrench, comprising: a wrench body (10), a ratchet wheel (20), a locking mechanism;

The wrench body (10) is provided with an annular through hole (15), and the ratchet wheel (20) is disposed in the through hole (15) and rotates around the through hole;

A slot body (40) for setting the locking mechanism is further disposed in the wrench body (10), the locking mechanism includes a locking block (31) and a spring (32), and the spring (32) has one end and the One end end of the locking block (31) abuts, and the other end abuts against an end side wall of the groove body (40), and the locking block (31) is not at one end abutting the spring (32) a locking tooth (311) is provided, and the locking tooth (311) is engaged with the ratchet (20);

An outer surface of the wrench body (10) is provided with an insulating layer (19).
The insulated ratchet wrench according to claim 1, wherein said ratchet (20) comprises a cylindrical wheel body (21) and ratchet teeth (22) evenly distributed in an outer circumferential direction thereof, said ratchet teeth (22) ) comprising two intersecting first faces (222) and a second face (221), the first face (222) and the second face (221) each intersecting a cylinder of the wheel body (21), and The cut surfaces at the intersection are a first cut surface (212) and a second cut surface (211);

The first surface (222) is perpendicular to the first cutting surface (212), and the angle between the second surface (221) and the second cutting surface (211) is 30° to 60°.
The insulated ratchet wrench according to claim 1, wherein one end of the locking block (31) in contact with the ratchet (20) is a concave arc surface, the arc surface and the ratchet The circumferential arc surface of (20) is matched; the locking teeth (311) are evenly distributed on the concave arc surface.
The insulated ratchet wrench according to claim 1, wherein the groove body (40) includes a first groove (41) for placing the locking block (31) and for placing the spring (32) a second slot (42); the first slot (41) is in communication with the through hole (15) and is also in communication with one end of the second slot (42); the spring (32) is not One end of the locking block (31) abuts against one end of the second groove (42) that is not in communication with the first groove (41);

The locking block (31) is displaceable in the radial direction of the first groove (41), and the first groove (41) limits the lateral displacement of the locking block (31).
The insulated ratchet wrench according to claim 1, wherein the wrench body (10) comprises a first piece (11), a second piece (12) and a seat (13); 13) Provided between the first piece (11) and the second piece (12), the first piece (11) and the second piece (12) are fixed to clamp the groove Seat (13);

The first groove (41) and the second groove (42) are both opened on the socket (13).
The insulated ratchet wrench according to claim 5, wherein the through hole (15) comprises a first through hole (151), a second through hole (152) and a third through hole which are coaxial and mutually penetrated ( 153); the first through hole (151) is disposed on the first piece (11), and the second through hole (152) is disposed on the second piece (12), the first a three-way hole (153) is disposed on the socket (13);

The ratchet teeth (22) are evenly distributed in the middle of the outer circumference of the wheel body (21) and are located in the third through hole (153); the two ends of the wheel body (21) are respectively placed in the The first through hole (151) and the second through hole (152); the inner diameters of the first through hole (151) and the second through hole (152) are smaller than the outer diameter of the ratchet (20) The inner diameter of the third through hole (153) is larger than the outer diameter of the ratchet (20).
The insulated ratchet wrench according to claim 1, wherein one end of the locking block (31) abutting the spring (32) is provided with a receiving groove (32); the spring (32) One end abutting the locking block (31) is placed in the receiving groove (32).
The insulated ratchet wrench according to any one of claims 1 to 7, characterized in that the insulating layer (19) is an injection-molded insulating material.
The insulated ratchet wrench according to claim 1, wherein said ratchet (20) comprises a cylindrical wheel body (21) and ratchet teeth (22) evenly distributed in an outer circumferential direction thereof, said ratchet teeth (22) ) comprising two intersecting first faces (222) and a second face (221), the first face (222) and the second face (221) each intersecting a cylinder of the wheel body (21), and The cut surfaces at the intersection are a first cut surface (212) and a second cut surface (211);

The first surface (222) is perpendicular to the first cutting surface (212), and the angle between the second surface (221) and the second cutting surface (211) is 30°.