CN111660237B

CN111660237B - Multifunctional ratchet wrench

Info

Publication number: CN111660237B
Application number: CN202010574727.6A
Authority: CN
Inventors: 李秦杨; 杨海东; 赵振新; 彭刚; 单常清
Original assignee: Shaodong Intelligent Manufacturing Innovative Institute
Current assignee: Shaodong Intelligent Manufacturing Innovative Institute
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2022-05-24
Anticipated expiration: 2040-06-22
Also published as: CN111660237A

Abstract

The invention relates to the field of wrench tools, in particular to a multifunctional ratchet wrench, which comprises a wrench head, a wrench handle, a ratchet wheel rotatably arranged in a groove of the wrench head, and an adapter fixedly connected with the ratchet wheel, wherein a pair of clamping swing arms are arranged in the groove of the wrench head, the fixed ends of the clamping swing arms are hinged with the wrench head, the movable ends of the clamping swing arms are formed with pawls meshed with the ratchet wheel, a switching piece is arranged between the clamping swing arms and hinged with the wrench head, a movable connecting shaft is arranged in the wrench handle and connected with the switching piece, and a structure for controlling the connecting shaft to rotate is further arranged on the wrench handle. The invention can complete the gear switching only by operating on the wrench handle, changes the rotatable direction of the ratchet wheel, improves the convenience of operation, particularly operation in narrow areas, and is simultaneously suitable for being matched with an impact screwdriver to disassemble rusted screws.

Description

Multifunctional ratchet wrench

Technical Field

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

Background

A wrench is a common hand tool, and mainly utilizes the lever principle to disassemble and assemble bolts, screws, nuts and other fasteners connected by threads. The ratchet wrench is a kind of spanner, based on self structural feature, can conveniently adjust the spanner and use the angle, often is applied to narrow and small space region like inside region such as locomotive, water tank, household electrical appliances.

A conventional ratchet wrench includes a ratchet provided at a wrench head, a pair of latch swing arms engaged with the ratchet, and a cam block switching the latch swing arms to be engaged with the ratchet. Wherein the free end of the sincere swing arm of card sets up the pawl, is provided with the elastomer simultaneously between the inside wall of every sincere swing arm of card and spanner head, and the elastomer keeps applying the elastic force to the sincere swing arm of card, orders about the pawl and the ratchet meshing of the sincere swing arm tip of card. When the cam block is rotated, the cam block pushes the end pawl of one of the clamping swing arms to leave the ratchet wheel and compress the spring, and the other clamping swing arm is meshed with the ratchet wheel under the action of elastic force, so that the ratchet wheel can only rotate in one direction. When in use, the cam block switches the unidirectional rotation direction, thereby being capable of more conveniently adjusting the use angle of the wrench.

However, this kind of ratchet spanner can't directly twist rusty screw, and rusty screw is generally dismantled through impacting the screwdriver, need carry out 360 degrees rotations around the screw during dismantlement, not only troublesome poeration, and the use is very hard because of the little reason use of moment moreover, is difficult to go on in narrow and small space region more. The existing ratchet wrench is difficult to be matched with an impact screwdriver for use, and when the ratchet wrench is matched with the impact screwdriver for use, if the ratchet is in a meshing state, the impact screwdriver used in a striking mode can obviously reduce the service life of the wrench, and the ratchet of the existing wrench is difficult to be switched to a bidirectional free rotation state and is stably kept. More importantly, current ratchet spanner needs directly to rotate the cam piece and switches, because ratchet and cam piece etc. all set up in spanner head department, consequently need both hands cooperation to switch the ratchet and turn to when using, and need stretch into the position of spanner head with the hand, increased difficulty and the potential safety hazard of operating in narrow and small region.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides the ratchet wrench which can better match with an impact screwdriver to screw a rusted screw and is more convenient to control and switch the ratchet direction.

In order to achieve the purpose, the invention provides a multifunctional ratchet wrench which comprises a wrench head, a wrench handle, a ratchet wheel rotatably arranged in a groove of the wrench head, and an adapter fixedly connected with the ratchet wheel, wherein a pair of clamping swing arms are arranged in the groove of the wrench head, the fixed ends of the clamping swing arms are hinged with the wrench head, the movable ends of the clamping swing arms are formed with pawls meshed with the ratchet wheel, a switching piece is arranged between the clamping swing arms and hinged with the wrench head, a movable connecting shaft is arranged in the wrench handle and connected with the switching piece, a structure for controlling the connecting shaft to rotate is further arranged on the wrench handle, openings are formed in two ends of the adapter, one end face of the adapter is a square hole, the other end face of the adapter is a quincunx hole, and the middle of the adapter is communicated to form a through hole.

Further, the front end of connecting axle through an elastic component with the rear end of switching piece is connected, the elastic component is established including fixed cover the epaxial axle sleeve of connecting and with the elastic block of switching piece movable contact, the rear end of switching piece is provided with a waist type groove, the elastic block activity sets up waist type inslot.

Furthermore, the structure for controlling the rotation of the connecting shaft comprises a control pin fixedly arranged on the connecting shaft and a V-shaped control groove formed on the wrench handle, and the control pin is arranged in the control groove in a sliding manner.

Further, the V-shaped bottom end of the control groove is also provided with a groove part.

Furthermore, a sleeve is further sleeved at the rear end of the wrench handle, the control pin penetrates through the control groove, and two ends of the control pin are respectively fixedly connected with the connecting shaft and the sleeve.

Furthermore, a limiting groove is formed in the sleeve, a limiting part is correspondingly arranged on the wrench handle, the limiting part is fixedly connected with the wrench handle, and meanwhile the limiting part is located in the limiting groove.

Furthermore, a rubber sleeve is arranged outside the sleeve.

Furthermore, the middle part of the switching piece is hinged on a mounting screw which is fixedly arranged in a groove of the wrench head.

Furthermore, the front end of the switching piece is set to be a fork-shaped structure and comprises two branches, the part for controlling the rotation of the clamping swing arms comprises magnets respectively arranged on the two branches, and the magnets and the corresponding clamping swing arms attract each other through magnetic attraction.

The scheme of the invention has the following beneficial effects:

according to the multifunctional ratchet wrench, the movable connecting shaft is arranged in the wrench handle and is connected with the switching piece through the elastic body, and meanwhile, the wrench handle is also provided with the structure that the control pin is matched with the control groove, so that gear switching can be completed only by operating the wrench handle, the rotatable direction of the ratchet wheel is changed, the convenience of operation, particularly operation in a narrow area is improved, in addition, the elastic piece can maintain the stability of a meshing state, and the condition that the unidirectional rotation state of the ratchet wheel fails due to loosening and gear disengagement is prevented;

the invention sets square hole and plum blossom hole at two ends of the adapter, which can be connected with the matched screw or impact screwdriver, while screwing the screw normally, the ratchet wheel is in the state of meshing and unidirectional rotation, while mounting the impact screwdriver and dismounting the rusted screw, the ratchet wheel is in the state of free and bidirectional rotation; correspondingly, the ratchet wrench is provided with a stable middle gear, and the ratchet wheel freely rotates in two directions under the gear, so that the impact screwdriver can be matched for operation, the service life of the wrench cannot be obviously shortened, and the practicability is further improved;

according to the invention, the magnetic attraction force is generated on the clamping swing arms by the magnet arranged on the switching piece, the clamping swing arms are driven to rotate and swing, so that the engagement between the pawls of different clamping swing arms and the ratchet wheel is switched, the rotatable direction of the ratchet wheel is changed, and compared with a structure adopting an elastic body to provide restoring force, the design size of the wrench head can be obviously reduced, the manufacturing cost is reduced, the appearance and the use convenience of the wrench are improved, and in addition, the magnet structure also has higher reliability and longer service life.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a perspective view of the overall structure of the present invention;

figure 3 is a schematic view of the back of an adapter of the present invention;

FIG. 4 is a schematic view illustrating a connection structure of a wrench head and a wrench handle according to the present invention;

FIG. 5 is a schematic view showing an end structure of the wrench handle according to the present invention;

FIG. 6 is a schematic view of the shape of the control slot of the present invention.

[ description of reference ]

1-wrench head; 2-pulling a handle; 3-ratchet wheel; 4-an adapter; 5-clamping the swing arm; 6-pawl; 7-a switch; 8-square hole; 9-plum blossom holes; 10-a connecting shaft; 11-an elastic member; 12-a shaft sleeve; 13-an elastic block; 14-waist-shaped groove; 15-a control pin; 16-a control slot; 17-a sleeve; 18-a limiting groove; 19-a limit stop; 20-rubber sleeve; 21-mounting screws; 22-bifurcation; 23-a magnet.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. 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.

As shown in fig. 1 and 2, an embodiment of the present invention provides a multifunctional ratchet wrench, which includes a wrench head 1, a wrench handle 2, a ratchet 3 rotatably disposed in a groove of the wrench head 1, and an adaptor 4 fixedly connected to the ratchet 3. A pair of clamping swing arms 5 is arranged in the groove of the wrench head 1, the fixed ends of the clamping swing arms 5 are hinged with the wrench head 1, pawls 6 meshed with the ratchet wheels 3 are formed at the movable ends, and the movable ends of the clamping swing arms 5 rotate around the fixed ends to enable the pawls 6 to be meshed with or separated from the ratchet wheels 3. A switching piece 7 is arranged between the two clamping swing arms 5, and the switching piece 7 is hinged with the wrench head 1 and can rotate freely. When the driving switch 7 is rotated, different pawls 6 can be switched to engage with the ratchet 3, thereby changing the rotatable direction of the ratchet 3. When the switching piece 7 is in the middle position, the pawls 6 of the two clamping swing arms 5 are not engaged with the ratchet wheel 3, and the ratchet wheel 3 is in a bidirectional free rotation state.

The two ends of the adapter 4 fixed with the ratchet wheel 3 are both provided with holes, one end surface is a square hole 8, the other end surface is a quincunx hole 9, and as shown in figure 3, the two ends are communicated to form a through hole. The square hole 8 and the quincuncial hole 9 can be sleeved with a matched screw or an impact screwdriver, the ratchet wheel 3 is in a meshed and unidirectional rotating state when the screw is normally screwed, and the ratchet wheel 3 is in a free and bidirectional rotating state when the impact screwdriver is installed and the rusted screw is disassembled.

In order to control the rotation of the switching member 7 through the wrench handle 2, so as to directly switch gears on the wrench handle 2 and adjust the rotation direction of the ratchet 3, in the present embodiment, a connecting shaft 10 capable of rotating relative to the wrench handle 2 is provided in the wrench handle 2, the front end of the connecting shaft is connected to the switching member 7, and meanwhile, a structure for controlling the rotation of the connecting shaft 10 is provided on the wrench handle 2. Therefore, when the wrench is used, the structure for controlling the rotation of the connecting shaft 10 on the wrench handle 2 is directly operated, the connecting shaft 10 is driven and the switching piece 7 is driven to rotate, and the meshing switching of different pawls 6 and ratchet wheels 3 is realized.

As shown in fig. 4, the front end of the connecting shaft 10 is connected to the rear end of the switching member 7 through an elastic member 11, and the elastic member 11 includes a shaft sleeve 12 fixedly sleeved on the connecting shaft 10 and an elastic block 13 movably contacted with the switching member 7, which are integrally disposed. The through hole of the shaft sleeve 12 is square and is matched with a section of connecting shaft 10 which is inserted into the shaft sleeve 12 and is also square, so that the elastic part 11 synchronously rotates along with the connecting shaft 10. A waist-shaped groove 14 is formed in the rear end of the switching piece 7, the elastic piece 11 is movably arranged in the waist-shaped groove 14, when the connecting shaft 8 is driven to rotate, the connecting shaft 8 drives the rear end of the switching piece 7 through the elastic block 13, the switching piece 7 is driven to rotate around a self hinge point, the front end position of the switching piece 7 is changed and drives the clamping swing arm 5 to enable the pawl 6 of the other clamping swing arm 5 to be meshed with the ratchet wheel 3, and the rotating direction of the ratchet wheel 3 is changed.

Because the elastic element 11 is made of elastic material, when the connecting shaft 10 rotates and drives the switching element 7 to complete the switching of the clamping swing arm 5, the switching element 7 and the clamping swing arm 5 can keep the position under the action of elastic force, the meshing state of the pawl 6 and the ratchet wheel 3 is maintained, and the unidirectional rotation state failure of the ratchet wheel 3 caused by loosening and gear shifting is prevented.

The switching member 7 has two offset angle positions, and each offset angle position corresponds to the rotation direction of one ratchet 3. When the switching piece 7 is located at the middle position and has no deflection angle, the pawls 6 of the two clamping swing arms 5 are not engaged with the ratchet wheel 3, and the ratchet wheel 3 can freely rotate in two directions.

The structure of the wrench handle 2 for controlling the rotation of the connecting shaft 10 can directly adjust the switching piece 7 to the deflection position or the middle position. As shown in fig. 2, the structure includes a control pin 15 fixedly disposed on the connecting shaft 10 and a control groove 16 formed in the trigger 2 and having a V shape, when the control pin 15 is located at two positions at the top end of the control groove 16, the switching member 7 is located at two angular positions, respectively, and the ratchet 3 is engaged and can rotate in one direction, and when the control pin 15 is located at the bottom end of the control groove 16, the switching member 7 is located at the center position, and the ratchet 3 is disengaged and is in a free rotation state in two directions.

It is apparent that when the control pin 15 slides along the control groove 16, the connecting shaft 10 is not only rotated but also axially displaced with respect to the wrench handle 2, so that the connecting shaft 10 is also axially movably connected with the wrench handle 2. In addition, because the front end of the connecting shaft 10 is provided with the elastic piece 11, under the limiting action of the waist-shaped groove 14 of the switching piece 7, the elastic piece 11 continuously applies forward elastic force to the connecting shaft 10, and therefore when the control pin 15 is positioned at two positions at the top end of the control groove 16, the connecting shaft 10 can keep the position under the action of elastic tension, the stability of the meshing state is maintained, and the unidirectional rotation state failure of the ratchet wheel 3 caused by loosening and gear-out is prevented. When the control pin 15 is located at the bottom end of the control groove 16, the control groove 16 is provided with a groove portion, as shown in fig. 6, so that the control pin 15 can maintain stable position under elastic tension.

In order to facilitate the hand-held operation, in this embodiment, a sleeve 17 is sleeved outside the wrench handle 2, and the sleeve 17 is fixedly connected to the control pin 15, that is, the control pin 15 passes through the control slot 16 of the wrench handle 2, and both ends of the control pin are fixedly connected to the connecting shaft 10 and the sleeve 17, respectively. When the sleeve 17 is held by hand to rotate relative to the trigger 2, the control pin 15 can be driven to slide along the control groove 17, so that the rotation state of the ratchet wheel 3 is switched.

The sleeve 17 is also rotated and axially displaced relative to the trigger lever 2. As shown in FIG. 5, sleeve 17 is freely fitted over the rear end of wrench handle 2 and is freely rotatable with respect to wrench handle 2. Meanwhile, a limiting groove 18 is formed in the sleeve 17, and an annular limiting member 19 is correspondingly formed in the wrench handle 2, is fixedly connected with the wrench handle 2, and is located in the limiting groove 18. The width of the limiting groove 18 is consistent with the V-shaped height of the control groove 16, so that the maximum axial distance of the control pin 15 along the control groove 16, i.e. the axial displacement range of the sleeve 17 relative to the wrench handle 2, is just consistent with the width of the limiting groove 18, and the installation position of the sleeve 17 is limited by the limiting groove 18 and the limiting piece 19.

In addition, a rubber sleeve 20 is arranged outside the sleeve 17, so that the wrench can be conveniently held by hand.

As a further improvement, in the present embodiment, the middle of the switching member 7 is hinged to a mounting screw 21, and the mounting screw 21 is fixedly disposed in the slot of the wrench head 1. The front end of the switching piece 7 is designed to be a fork-shaped structure, the ends of the two forks 22 are respectively provided with a cylindrical and vertically arranged magnet 23, the bottom end of the magnet is contacted with the inner side of the clamping swing arm 5 made of ferromagnetic materials, and the contact state is maintained through magnetic attraction.

When the front end of the switching piece 7 rotates around the mounting screw 21, the magnet 23 on one branch 22 pushes the corresponding latch swing arm 5 to rotate outwards, so that the pawl 6 on the latch swing arm 5 is separated from the ratchet 3, and the magnet 23 on the other branch 22 attracts the other latch swing arm 5 to rotate inwards in the synchronous rotation process, so that the pawl 6 is meshed with the ratchet 3, and the switching of the rotation direction of the ratchet 3 is completed. Of course, the magnet 23 and the latch swing arm 5 can be integrated to realize the rotation switching of the latch swing arm 5, and no magnetic material is needed, but the clamping stagnation phenomenon may occur due to the angle of the ratchet 3 when the ratchet 3 is matched with the pawl 6, so that the preferred embodiment adopts a magnetic structure, compared with a spring structure, the design size of the wrench head 1 and the slot can be obviously reduced, and the reliability and the service life can be improved.

While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.

Claims

1. A multifunctional ratchet wrench comprises a wrench head, a wrench handle, a ratchet wheel rotatably arranged in a groove of the wrench head, and an adapter fixedly connected with the ratchet wheel, wherein a pair of clamping swing arms are arranged in the groove of the wrench head, the fixed ends of the clamping swing arms are hinged with the wrench head, a pawl meshed with the ratchet wheel is formed at the movable end, a switching piece is arranged between the clamping swing arms, and the switching piece is hinged with the wrench head;

the front end of the switching piece is of a fork-shaped structure and comprises two branches, the part for controlling the rotation of the clamping swing arm comprises magnets respectively arranged on the two branches, and the magnets and the corresponding clamping swing arms attract each other through magnetic attraction;

The front end of the connecting shaft is connected with the rear end of the switching piece through an elastic piece, the elastic piece comprises a shaft sleeve fixedly sleeved on the connecting shaft and an elastic block movably contacted with the switching piece, a waist-shaped groove is formed in the rear end of the switching piece, and the elastic block is movably arranged in the waist-shaped groove;

the structure for controlling the rotation of the connecting shaft comprises a control pin fixedly arranged on the connecting shaft and a V-shaped control groove formed on the wrench handle, and the control pin is arranged in the control groove in a sliding manner;

the V-shaped bottom end of the control groove is also provided with a groove part.

2. The multi-functional ratchet wrench of claim 1, wherein a sleeve is further sleeved at the rear end of the wrench handle, the control pin passes through the control slot, and both ends of the control pin are respectively and fixedly connected with the connecting shaft and the sleeve.

3. The multi-functional ratchet wrench of claim 2, wherein the socket further has a limiting groove formed thereon, the wrench handle is correspondingly provided with a limiting member, the limiting member is fixedly connected to the wrench handle, and the limiting member is located in the limiting groove.

4. The multi-function ratchet wrench of claim 3, wherein the sleeve is further provided with a rubber sleeve.

5. The multi-function ratchet wrench of claim 1, wherein the switching member is pivotally mounted at a middle portion thereof to a mounting screw fixedly disposed within a slot of the wrench head.