CN110834292A

CN110834292A - Ratchet wrench

Info

Publication number: CN110834292A
Application number: CN201911142515.4A
Authority: CN
Inventors: 郭飞; 王永胜; 李中辉; 党杰; 周默
Original assignee: LUOHE POWER SUPPLY COMPANY STATE GRID HENAN ELECTRIC POWER Co Ltd
Current assignee: LUOHE POWER SUPPLY COMPANY STATE GRID HENAN ELECTRIC POWER Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-02-25

Abstract

The invention discloses a ratchet wrench, and belongs to the technical field of wrench tools. It is including setting up the ratchet on the spanner, ratchet is including installing the hole ratchet on the spanner, still includes the adjustable spanner head, the adjustable spanner head can set up in the hole of hole ratchet and be used for with the hole ratchet can be dismantled and be connected. The movable wrench head is detachably connected with the inner hole ratchet wheel, the ratchet wrench has the function of the movable wrench, bolt connecting pieces of various specifications can be conveniently disassembled and assembled, and meanwhile, an adapter which is matched with the bolt connecting pieces with various outer diameters is not required to be carried, so that the weight of the tool can be reduced. The movable wrench head can be conveniently separated from the inner hole ratchet wheel and the wrench, the structure is simple, the assembly is convenient, and the maintenance cost is low.

Description

Ratchet wrench

Technical Field

The invention relates to the technical field of wrench tools, in particular to a ratchet wrench.

Background

The ratchet wrench is a manual screw tightening tool and is formed by connecting a main plum blossom sleeve and a secondary plum blossom sleeve of different specifications and sizes in a manner that a female key and a male key of an articulated key are occluded. The adjustable wrench handle can conveniently adjust the using angle of the wrench.

The adjustable wrench has an opening width adjustable within a certain range, and is a tool for fastening and loosening nuts and bolts of different specifications. The adjustable spanner consists of a head part and a handle part, wherein the head part consists of an adjustable spanner lip, a fixed spanner lip, a spanner opening, a turbine and a shaft pin.

Chinese patent document CN1041179C, published on 16.12.1998, describes an adjustable wrench comprising a housing having an axis about which the housing itself is rotatable; a first rotating member coaxially mounted on said housing and rotatable about an axis relative to the housing; a ratchet mechanism connected to the housing for rotation therewith about the axis of the housing in either a clockwise or counterclockwise direction; a plurality of jaws moving inwardly or outwardly relative to the shaft for gripping the workpiece, each jaw having a gripping surface facing the shaft, the first rotary disk including a plurality of radial slots in which each jaw is slidably engaged; further, said wrench includes a second rotatable member coaxial with said housing and said first rotatable member, said second rotatable member having a plurality of cams engaging each of said jaws and each cam having an inner end proximate to said axis and an outer end distal from said axis; further, the wrench includes a cam follower mechanism formed on the jaw and engaged with the cam to close the jaw when the second rotating member is rotated in one direction relative to the first rotating member and to open the jaw when rotated in the opposite direction. The technical scheme improves and obtains a tool which can conveniently adjust the using angle of the wrench and can be used for fastening and loosening nuts or bolts with different specifications on the basis of the ratchet wrench. Due to the limitation of the thickness of the circular wall of the rotating disk, the adjustable wrench is not suitable for being applied to a narrow space.

Chinese patent document CN202742268U, published in 2013, month 2 and day 20, describes a ratchet adjustable wrench, which includes a handle, a worm, a jaw opening composed of a fixed jaw and a movable jaw, wherein the movable jaw slides along the two jaw angle edges, a wedge and a return spring, wherein the lower surface of the wedge is provided with a convex column, a through hole is arranged on the convex column, the movable jaw is provided with a groove along a clamping inclined plane, the size of the groove corresponds to that of the convex column, the groove is used for the convex column to slide inside, the big end of the wedge is embedded into the groove towards the jaw opening direction and is connected with the movable jaw in a sliding manner, the return spring is arranged in the through hole of the convex column, one end of the return spring is fixedly connected with the movable jaw. The technical scheme improves and obtains a tool which can conveniently adjust the using angle of the wrench and can be used for fastening and loosening nuts or bolts with different specifications on the basis of the adjustable wrench. When the wedge block and the fixed jaw are used, the clamping force of the wedge block and the fixed jaw on a bolt or a nut is weak.

Disclosure of Invention

Accordingly, the present invention is directed to a ratchet wrench, which solves the technical problem that the conventional tool for fastening or loosening nuts or bolts of different specifications is not suitable for use in a narrow space, while the use angle of the wrench can be conveniently adjusted.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a ratchet wrench, is including setting up the ratchet on the spanner, ratchet is including installing the hole ratchet on the spanner, still includes the adjustable wrench head, the adjustable wrench head can set up in the hole of hole ratchet and be used for with the connection can be dismantled to the hole ratchet.

Preferably, the adjustable wrench head comprises a small fixed pulling lip, an adjustable large pulling lip and an adjusting worm wheel, the small fixed pulling lip is connected with the movable large pulling lip moving pair, the axis of the adjusting worm wheel is arranged in parallel to the moving direction of the movable large pulling lip, the adjusting worm wheel is connected with the small fixed pulling lip rotating pair, and the adjustable large pulling lip is connected with the adjusting worm wheel screw pair.

Furthermore, a fixing hole is formed in the small solid pulling lip, and the ratchet wrench further comprises a fastener for detachably connecting the small solid pulling lip to the inner hole ratchet.

Furthermore, when the clamping surface of the movable large spanner lip is attached to the clamping surface of the movable small spanner lip, the movable spanner head can still be detachably connected with the inner hole ratchet wheel.

Preferably, the inner hole ratchet wheel is connected with the movable wrench head in a chimeric mode.

Preferably, the thickness of the movable wrench head is less than or equal to that of the inner hole ratchet wheel.

Preferably, the included angle between the plane of the wrench and the rotating shaft of the ratchet mechanism is 60-90 degrees.

Furthermore, the included angle between the plane of the wrench and the rotating shaft of the ratchet mechanism is 75 degrees.

Preferably, the wrench is provided with a direction adjuster for adjusting the limiting direction of the pawl of the ratchet mechanism.

Preferably, the inner hole of the inner hole ratchet wheel is a plum blossom-shaped trepan boring.

When the adjustable wrench described in the reference CN1041179C is used, the jaws move along the cam guide rails on the rotating disc, so as to lock the bolt or the nut. Due to the limitation of the thickness of the ring wall of the rotating disk, in order to conveniently disassemble bolts with the specification of 10 mm-24 mm, the outer diameter of a shell of the adjustable wrench is generally increased by improving the adjustable wrench in the field, or jaws extend to the outer side of the rotating disk as described in the specification, so that the adjustable wrench is not suitable for being applied to a narrow space.

When the ratchet wrench described in CN202742268U is used, the distance between the movable jaw and the fixed jaw needs to be greater than the distance between the bolt or the nut to be screwed, locking of the bolt or the nut to be screwed is achieved by the wedge and the return spring on the movable jaw, and when the handle is rotated in the reverse direction, the wedge slides into the groove, thereby achieving the effect of the ratchet wrench. Although the ratchet spanner is suitable for a narrow space, it is inconvenient to install a bolt of 10mm to 24mm in size because the wedge and the fixed jaw have weak clamping force to the bolt or the nut.

The invention has the beneficial effects that:

the movable wrench head is detachably connected with the inner hole ratchet wheel, the ratchet wrench has the function of the movable wrench, bolt connecting pieces of various specifications can be conveniently disassembled and assembled, and meanwhile, an adapter which is matched with the bolt connecting pieces with various outer diameters is not required to be carried, so that the weight of the tool can be reduced. Compared with the comparison document CN1041179C, the adjustable wrench head can be conveniently separated from the inner hole ratchet wheel and the wrench, and has simple structure, convenient assembly and low maintenance cost. Because the structure is simplified, the size of the ratchet mechanism can be reduced on the basis of clamping a bolt or a nut, and the ratchet mechanism can be conveniently used in a narrow space. The ratchet wrench is more effective in holding a bolt or a nut than the comparison document CN 202742268U.

The movable wrench head adopts the matching mode of the small fixed wrench lip and the movable large wrench lip, which is different from the mode of adopting the large fixed wrench lip and the movable small wrench lip for the conventional movable wrench head, and the reason is that after the movable wrench head is embedded and installed in the inner hole of the inner hole ratchet wheel, the small fixed wrench lip is matched with the inner hole ratchet wheel to form a thicker structure, so that the size adjusting range of the movable wrench head and the torsional strength of the movable wrench head can be considered on the basis of reducing the space occupied by the movable wrench head to the inner hole of the inner hole ratchet wheel.

The fastener can install the movable wrench head in the inner-hole ratchet wheel, and avoids the problem that the movable wrench head is easy to separate from the inner-hole ratchet wheel to cause the loss of the movable wrench head when the movable wrench head is connected with the inner-hole ratchet wheel in an embedded mode.

Drawings

FIG. 1 is a front view of a ratchet wrench of the present invention.

Fig. 2 is a left side view of fig. 1.

FIG. 3 is an enlarged view of a portion of the ratchet end of the ratchet wrench of the present invention.

FIG. 4 is a left side perspective view of a movable wrench head of a ratchet wrench of the present invention.

FIG. 5 is an exploded view of the adjustable wrench head of the ratchet wrench of the present invention.

FIG. 6 is a view showing a state of use of the adjustable wrench head of the ratchet wrench according to the present invention.

FIG. 7 is a dimension view of the adjustable wrench head of a ratchet wrench according to the present invention, wherein the dimension is in mm.

In the figure, 1-wrench, 11-inner hole ratchet wheel, 12-direction regulator, 13-shaping wrench, 2-adjustable wrench head, 21-small solid wrench lip, 211-collision avoidance gap, 22-large solid wrench lip, 221-collision avoidance angle, 23-adjusting worm wheel.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1: a ratchet wrench, see Figs. 1-6, comprises a ratchet mechanism arranged on a wrench 1, the ratchet mechanism comprises an inner hole ratchet wheel 11 arranged on the wrench 1, and a movable wrench head 2, the movable wrench head 2 can be arranged in an inner hole of the inner hole ratchet wheel 11 and is used for being detachably connected with the inner hole ratchet wheel 11.

Referring to fig. 3, preferably, the adjustable wrench head 2 includes a small fixed wrench lip 21, an adjustable large wrench lip 22 and an adjusting worm wheel 23, the small fixed wrench lip 21 is connected with a moving pair of the adjustable large wrench lip 22, an axis of the adjusting worm wheel 23 is arranged parallel to a moving direction of the adjustable large wrench lip 22, the adjusting worm wheel 23 is connected with a rotating pair of the small fixed wrench lip 21, and the adjustable large wrench lip 22 is connected with the adjusting worm wheel 23 in a screw pair manner.

Referring to fig. 3, preferably, the female ratchet 11 is engaged with the adjustable wrench head 2. Referring to fig. 3, when the adjustable wrench head 2 is embedded in the inner hole of the inner hole ratchet wheel 11, the wall body of the inner hole ratchet wheel 11 thickens the small solid pulling lip 21, which can strengthen the strength of the small solid pulling lip, thus, the size adjusting range of the adjustable wrench head and the torsional strength of the adjustable wrench head can be considered on the basis of reducing the space occupied by the adjustable wrench head on the inner hole of the inner hole ratchet wheel. In order to fully exert the size adjusting effect of the adjustable wrench head 2, when the clamping surface of the large adjustable wrench lip 22 is jointed with the clamping surface of the small adjustable wrench lip 21, the adjustable wrench head 2 can still be detachably connected with the inner hole ratchet wheel 11.

Preferably, the thickness of the movable wrench head 2 is less than or equal to that of the inner hole ratchet wheel 11. Or the thickness of the movable wrench head 2 is slightly thicker than that of the inner hole ratchet wheel 11, so that the situation that the nut at the narrow space cannot be detached after the movable wrench head 2 is too thick can be avoided.

Referring to fig. 2, it is preferable that the plane of the wrench 1 is at an angle (i.e., ∠ a-90 °) of 60 ° to 90 ° with respect to the rotation axis of the ratchet mechanism 11, and further, the plane of the wrench 1 is at an angle of 75 ° with respect to the rotation axis of the ratchet mechanism 11.

Referring to fig. 1-2, wrench 1 is preferably provided with a direction adjuster 12 for adjusting the direction of the limit of the pawl of the ratchet mechanism.

Referring to fig. 3, preferably, the inner hole of the inner hole ratchet wheel 11 is a quincuncial sleeve hole.

When the adjustable spanner is used, the adjusting worm wheel of the adjustable spanner head 2 is adjusted to enable the movable large spanner lip and the small fixed spanner lip to clamp the nut or the screw, then the rotation direction of the ratchet mechanism meets the requirement of dismounting the nut or the screw, the inner hole ratchet wheel is sleeved on the adjusting worm wheel by holding the spanner 1, and the nut or the screw can be dismounted by repeatedly swinging the spanner 1.

Example 2: a ratchet wrench, see Figs. 1-6, comprises a ratchet mechanism arranged on a wrench 1, the ratchet mechanism comprises an inner hole ratchet wheel 11 arranged on the wrench 1, and a movable wrench head 2, the movable wrench head 2 can be arranged in an inner hole of the inner hole ratchet wheel 11 and is used for being detachably connected with the inner hole ratchet wheel 11. In order to avoid the problem that the movable wrench head is easy to separate from the inner hole ratchet wheel when the movable wrench head is connected with the inner hole ratchet wheel in an embedded mode, and the movable wrench head is lost, a fixing hole can be formed in the small solid wrench lip 21, and the ratchet wrench further comprises a fastener which is used for detachably connecting the small solid wrench lip 21 to the inner hole ratchet wheel 11. The fastener can be selected from small screws.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a ratchet wrench, is including setting up the ratchet on the spanner, ratchet is including installing the hole ratchet on the spanner, its characterized in that, still includes the adjustable wrench head, the adjustable wrench head can set up in the hole of hole ratchet and be used for with the hole ratchet can be dismantled and be connected.

2. The ratchet wrench of claim 1, wherein the adjustable wrench head comprises a small fixed wrench lip, an adjustable large wrench lip and an adjusting worm gear, the small fixed wrench lip is connected with the movable large wrench lip moving pair, the axis of the adjusting worm gear is arranged in parallel with the moving direction of the adjustable large wrench lip, the adjusting worm gear is connected with the small fixed wrench lip rotating pair, and the adjustable large wrench lip is connected with the adjusting worm gear screw pair.

3. The ratchet wrench of claim 2, wherein a retaining hole is provided in the small spanner lip, the ratchet wrench further comprising a fastener for removably attaching the small spanner lip to the female ratchet.

4. The ratchet wrench of claim 2, wherein the wrench head remains releasably engageable with the female ratchet when the clamping surface of the enlarged flexible lip is engaged with the clamping surface of the minor flexible lip.

5. The ratchet wrench of claim 1, wherein the female ratchet is engaged with the moveable wrench head.

6. The ratchet wrench of claim 1, wherein the thickness of the wrench head is less than or equal to the thickness of the female ratchet.

7. The ratchet wrench of claim 1, wherein the plane of the wrench is at an angle of 60 ° to 90 ° to the axis of rotation of the ratchet mechanism.

8. The ratchet wrench of claim 7, wherein the plane of the wrench is at an angle of 75 ° to the axis of rotation of the ratchet mechanism.

9. The ratchet wrench of claim 1, wherein the wrench has a direction adjuster mounted thereon for adjusting the direction of the limit of the pawl of the ratchet mechanism.

10. The ratchet wrench of claim 1, wherein the internal bore of the female ratchet is a torx socket.