CN112109046A - Impact wrench - Google Patents

Abstract

An impact wrench includes a casing and a handle connected to the casing. The housing includes a main body part for accommodating the motor and a protruding part protruding downward from the bottom of the main body part; A holding part, the sleeve part surrounds the outer side of the main body part, and the casing can freely rotate relative to the sleeve part in a small range. The grip portion has a side wall and a hollow cavity surrounded by the side wall, the protruding portion is located in the hollow cavity, and the impact wrench includes an elastic member located between the protruding portion and the side wall of the grip portion One end of the elastic piece is in contact with the side wall of the holding portion and the other end is in contact with the protruding portion, so that the vibration damping system can be installed in a narrow space. Thereby, the sleeve part covers a large area of the surface of the casing, and the impact wrench can achieve the vibration reduction effect while ensuring the overall strength.

Description

impact wrench

[Technical field]

The present invention relates to the technical field of hand-held tools, in particular to an impact wrench with a vibration damping system.

[Background technique]

Due to the small internal space of the existing impact wrench, the installation of a general vibration reduction system may lead to insufficient strength of the impact wrench as a whole, so the existing impact wrench generally does not have a vibration reduction system; therefore, the existing impact wrench does not have a vibration reduction system. During use, due to the impact, the vibration will be severe, which will seriously affect the communication of the battery pack in the impact wrench and the structural stability of the battery pack, so that the entire impact wrench cannot work, and as the torque increases, The problem became more and more obvious. At the same time, when the user operates the impact wrench for a long time, fatigue is easily generated due to the violent vibration of the impact wrench.

In view of this, it is indeed necessary to provide an improved impact wrench to overcome the shortcomings of the prior art.

[Content of the Invention]

In view of the deficiencies of the prior art, the purpose of the present invention is to provide an impact wrench with a vibration damping system, which ensures the overall strength of the impact wrench while achieving the vibration damping effect.

The technical solution adopted by the present invention to solve the problems of the prior art is: an impact wrench, comprising a casing and a handle connected to the casing. The housing includes a main body part for accommodating the motor and a protruding part protruding downward from the bottom of the main body part; A gripping part below the sleeve part, the sleeve part surrounds the outer side of the main body part, the gripping part has a side wall and a hollow cavity surrounded by the side wall, and the protruding part is located at the In the hollow cavity, the impact wrench includes an elastic piece located between the protruding portion and the side wall of the holding portion, one end of the elastic piece abuts against the side wall of the holding portion and the other One end abuts on the protruding portion.

A further improvement solution is: the main body portion includes a middle portion located in the middle section and recessed inward from the outer circumference, the sleeve portion covers the outer circumference of the middle portion, and between the sleeve portion and the middle portion form a gap.

A further improvement scheme is: the inner diameter of the sleeve portion is not smaller than the outer diameter of the middle portion of the main body portion, the inner diameter of the sleeve portion is smaller than the outer diameter of the outer main body portion at both ends of the middle portion, and the main body portion is provided with The protrusions are located at both ends of the middle part, and the protrusions are used to prevent the axial movement of the sleeve part.

A further improvement scheme is that: the holding portion is provided with a groove that is recessed inward from the side wall and corresponding to the protruding portion, and the groove accommodates the elastic member.

A further improvement scheme is: the handle includes a left casing and a right casing that cooperate with each other, the left casing is provided with a left sleeve part and a left grip part located under the left sleeve part, and the right casing The body is provided with a right sleeve part and a right grip part located below the right sleeve part, the left sleeve part cooperates with the right sleeve part to form the sleeve part, and the left grip part and the right sleeve part cooperate to form the sleeve part. The right grip portion cooperates to form the grip portion.

A further improvement scheme is: the raised portion is provided with a mounting hole formed by a depression from the surface facing the side wall of the holding portion, the mounting hole is arranged corresponding to the groove of the holding portion, and the elastic member is One end is accommodated in the mounting hole and the other end is accommodated in the groove.

A further improvement scheme is: the mounting hole includes a first mounting hole formed from a recess on the surface facing the side wall of the left grip portion and a second mounting hole formed from a recess on the surface facing the side wall of the right grip portion, The first mounting hole and the second mounting hole do not pass through each other.

A further improvement scheme is: the top of the left sleeve portion is provided with a left matching portion, the top of the right sleeve portion is provided with a right matching portion, and the left matching portion and the right matching portion are arranged corresponding to each other and are tightened. Firmware connection mating.

A further improvement scheme is: the bottom of the left sleeve part and the left grip part have at least one left matching part, the bottom of the right sleeve part and the right grip part have at least one right matching part, at least One of the left matching parts and at least one of the right matching parts are arranged corresponding to each other and are connected and matched by fasteners.

A further improvement solution is: one of the left matching portion and the right matching portion has a transversely penetrating through hole and the other has a transversely inwardly recessed threaded hole, the fastener is a screw, and the fastening The piece passes through the through hole and is fixed with the threaded hole in a screw connection manner.

Compared with the prior art, the present invention has the following beneficial effects: the casing includes a main body part for accommodating the motor and a protruding part protruding downward from the bottom of the main body part; the handle comprises a main body part sleeved on the main body part The sleeve part on the outer circumference and the grip part located under the sleeve part, the sleeve part surrounds the outer side of the main body part, and the casing can freely rotate relative to the sleeve part in a small range. The gripping portion has a hollow cavity surrounded by side walls, the protruding portion is located in the hollow cavity, the impact wrench includes an elastic piece located between the protruding portion and the sidewall of the gripping portion, the One end of the elastic piece is abutted against the side wall of the holding portion and the other end is abutted against the protruding portion, so that the vibration damping system can be installed in a narrow space. Thereby, the sleeve part covers the main body (that is, covers a larger area of the surface of the casing), which ensures the overall strength of the impact wrench; and a gap is formed between the sleeve part and the middle part , to ensure that the housing can freely rotate relative to the sleeve part in a small range for buffering; at the same time, an elastic member is arranged between the raised part and the side wall of the grip part to form a small space. Vibration damping system to reduce the vibration and impact of the impact wrench when working, so as to achieve the vibration damping effect.

[Description of drawings]

Below in conjunction with the accompanying drawings, the specific embodiments of the present invention are described in further detail:

Fig. 1 is the three-dimensional schematic diagram of the impact wrench of the preferred embodiment of the present invention;

Fig. 2 is the exploded schematic diagram of the impact wrench shown in Fig. 1;

Fig. 3 is the sectional view of the impact wrench shown in Fig. 1 along the axial direction;

4 is a cross-sectional view of the impact wrench shown in FIG. 1 along a radial direction;

FIG. 5 is a perspective view of the impact wrench shown in FIG. 1 after removing the right housing;

6 is a perspective view of the impact wrench according to the second embodiment of the present invention after removing the right casing.

The meaning of the reference numbers in the figure:

100. Impact wrench 10, housing 11, main body 111, front section 112, middle section 113, rear section 12, protruding section 121, first mounting hole 122, second mounting hole 20, handle 21, sleeve section 211, left sleeve part 212, right sleeve part 22, holding part 221, left holding part 222, right holding part 223, groove 23, accommodating part 231, accommodating cavity 24, left matching part 241, thread Hole 25 , right matching portion 251 , through hole 26 , fastener 30 , battery pack 40 , elastic member 50 , battery pack foot plate 11 ′, main body portion

[Detailed ways]

Referring to FIGS. 1 to 5 , the present invention discloses an impact wrench 100 having a vibration reduction system to achieve the vibration reduction effect of the impact wrench 100 . The impact wrench 100 includes a casing 10 , a handle 20 and a battery pack 30 . The casing 10 and the battery pack 30 are respectively connected to the upper and lower ends of the handle 20 . The housing 10 is used for accommodating the motor and/or the transmission components, that is, the housing 10 may be the housing of the motor, the housing of the gearbox, or the housing jointly used by the motor and the gearbox. In this embodiment, the casing 10 is used as a casing for a motor and a gear box; the battery pack 30 is used as a power source for the motor in the casing 10 .

2 and 3 , the housing 10 includes a main body 11 for accommodating a motor and a protruding portion 12 protruding downward from the bottom of the main body 11 , and the protruding portion 12 is integrally formed on the main body section 11. The main body 11 is provided with a front section 111 , a middle section 112 and a rear section 113 along the axial direction, and the front section 111 is connected with a working head (not numbered). The middle portion 112 is located in the middle section of the main body portion 11 and is recessed inward from the outer circumference of the main body portion 11 .

Referring to FIGS. 2 to 5 , the handle 20 includes a sleeve portion 21 sleeved on the outer periphery of the main body portion 11 , a grip portion 22 located below the sleeve portion 21 , and a accommodating portion located below the grip portion 22 . 23 , the accommodating part 23 is used for receiving the battery pack 30 . The sleeve portion 21 covers the outer periphery of the middle portion 112 of the main body portion 11 to fix the main body portion 11 in the axial direction; Covering a large area of the surface of the housing 10 ensures the overall strength of the impact wrench 100 . At the same time, a gap is formed between the sleeve portion 21 and the middle portion 112 and is not circumferentially fixed, which ensures that the casing 10 can convert the vibration shock into a small range relative to the sleeve portion 21 when it is subjected to vibration and shock. Circumferential rotation to buffer the above vibration shock.

The inner diameter of the sleeve portion 21 is not smaller than the outer diameter of the middle portion 112 of the main body portion 11 , and the inner diameter of the sleeve portion 21 is smaller than the outer diameter of the main body portion 11 at both ends of the middle portion 112 , and the main body portion 11 There are protrusions located at both ends of the intermediate portion 112 for preventing the axial movement of the sleeve portion 21 . At the same time, the outer diameter of the sleeve portion 21 is not larger than the outer diameters of the front portion 111 and the rear portion 113 of the main body portion 11 (that is, the outer diameters of the main body portion 11 except for the middle portion 112 ). While ensuring the overall strength of the impact wrench 100, it is avoided to increase the overall volume of the impact wrench 100.

In this embodiment, the handle 20 is composed of a left casing 201 and a right casing 202 that cooperate with each other. The left casing 201 is provided with a left sleeve part 211 and a left grip part located below the left sleeve part 211 221, the right casing 202 is provided with a right sleeve part 212 and a right grip part 222 located below the right sleeve part 212; the left sleeve part 211 and the right sleeve part 212 cooperate to form the sleeve part 21. The left gripping portion 221 and the right gripping portion 222 cooperate to form the gripping portion 22 .

The top of the left sleeve portion 211 is provided with a left matching portion 24 , and the top of the right sleeve portion 212 is provided with a right matching portion 25 . The left matching portion 24 and the right matching portion 25 are arranged corresponding to each other and are tightened Pieces 26 are connected to fit. One of the left matching portion 24 and the right matching portion 2 has a through hole 251 penetrating laterally and the other has a threaded hole 241 recessed laterally inward, the fastener 26 is a screw, and the fastener 26 Pass through the through hole 251 and be fixed with the threaded hole 241 in a threaded manner. In this embodiment, the left matching portion 24 has a threaded hole 241 and the right matching portion 25 has a through hole 251 , and the fastener 26 passes through the through hole 251 of the right matching portion 25 and communicates with the left sleeve portion 24 . The threaded holes 241 are fixed in a threaded connection.

Meanwhile, the bottom of the left sleeve portion 211 and the left grip portion 221 have at least one left matching portion 24 , the bottom of the right sleeve portion 212 and the right grip portion 222 have at least one right matching portion 25 , at least one The left matching portion 24 and at least one right matching portion 25 are arranged corresponding to each other and are connected and matched by a fastener 26 . In this embodiment, the bottom of the left sleeve portion 211 and the left grip portion 221 both have a pair of left matching portions 24 , and the bottom of the right sleeve portion 212 and the right grip portion 222 also have a pair of Right fitting part 25 . The left matching portion 24 and the right matching portion 25 cooperate with each other and are threadedly connected with fasteners 26 to ensure that the left casing 201 and the right casing 202 form an integral casing 20 .

Referring to FIG. 4 , the holding portion 22 has a side wall and a hollow cavity 203 surrounded by the side wall. The protruding portion 12 of the housing 10 is located in the hollow cavity 203 . The impact wrench 100 includes an elastic member 40 located between the protruding portion 12 and the side wall of the grip portion 22 , one end of the elastic member 40 abuts against the side wall of the grip portion 22 and the other end abuts against the protruding portion 22 . On the raised portion 12 , the vibration reduction effect between the housing 10 and the handle 20 is achieved. The holding portion 22 is provided with a groove 223 recessed inward from the side wall and corresponding to the protruding portion 12 , and the groove 223 accommodates the elastic member 40 .

In this embodiment, the protruding portion 12 is provided with a mounting hole recessed from the surface facing the side wall of the holding portion 22 , and the mounting hole is correspondingly provided with the groove 223 of the holding portion 22 , and the elastic member 40 One end is accommodated in the mounting hole and the other end is accommodated in the groove 223 . The mounting holes include a first mounting hole 121 formed from a recessed surface facing the side wall of the left holding portion 221 and a second mounting hole 122 formed from a recessed surface facing the side wall of the right holding portion 222 . The holes 121 and the second mounting holes 122 correspond to each other in the lateral direction but do not penetrate each other. The elastic members 40 are springs or rubber members and are divided into two pairs. One pair of elastic members 40 is accommodated between the first installation hole 121 and the groove 223 of the left grip portion 221 , and the other pair of elastic members 40 is accommodated. between the second mounting hole 122 and the groove 223 of the right holding portion 222 . Thereby, the impact wrench 100 forms a vibration reduction system in a narrow space, so as to further reduce the vibration and impact of the impact wrench 100 during operation, so as to achieve the vibration reduction effect.

The impact wrench 100 further includes a battery pack foot plate 50 for installing the battery pack 30 , the accommodating portion 23 of the handle 20 is located below the grip portion 22 and has a accommodating cavity 231 , and the battery pack foot plate 50 is accommodated in the handle 22 . Inside the accommodating cavity 231 of the accommodating portion 23 . The battery pack foot plate 50 is located at the lower end of the handle and is electrically connected to the motor and transmission components in the housing 10 through wires.

Please refer to FIG. 6 , which is a schematic diagram of the impact wrench 100 according to the second embodiment of the present invention after removing the right housing 202 . The structure of the impact wrench 100 in the second embodiment is substantially the same as that of the first embodiment, and the difference between the two is only the casing: the main body 11 of the casing 10 in the first embodiment is an integral structure, and The protruding portion 12 is integrally formed under the main body portion 11 ; and in the second embodiment, the main body portion 11 ′ of the housing is assembled from the left and right half shells that cooperate with each other and is fixed and formed by screws, and the protruding portion 11 ′. The rising portion 12 is integrally formed under one of the left and right half shells. The arrangement of the main body portion 11' in the second embodiment is convenient for the assembly of the motor and transmission components in the housing 10 in the existing design.

In the present invention, the housing 10 includes a main body portion 11 and a protruding portion 12 protruding downward from the bottom of the main body portion 11 , and the handle 20 includes a sleeve portion 21 sleeved on the outer periphery of the main body portion 1 and a sleeve portion 21 located on the outer periphery of the main body portion 1 . The gripping portion 22 below the sleeve portion 21, the sleeve portion 21 surrounds the outer side of the main body portion 11, and a gap is formed between the sleeve portion 21 and the middle portion 112 and is not circumferentially fixed, so that the casing The body 10 is circumferentially rotatable relative to the sleeve portion 21 to a small extent. The grip portion 22 has a side wall and a hollow cavity 203 surrounded by the side wall. The protruding portion 12 is located in the hollow cavity 203 . The elastic member 40 between the side walls, one end of the elastic member 40 abuts on the side wall of the holding portion 22 and the other end abuts on the raised portion 12 , so that the vibration damping system can be installed in a narrow space. Thereby, the sleeve portion 21 covers the main body portion 11 (ie, covers a larger area of the surface of the housing 10 ), which ensures the overall strength of the impact wrench 100 ; the sleeve portion 21 and the middle portion A gap is formed between 112 and is not circumferentially fixed, which ensures that the housing 10 can freely rotate relative to the sleeve portion 21 in a small range when subjected to vibration and shock, so as to buffer the above-mentioned vibration and shock. At the same time, an elastic member 40 is arranged between the raised portion 12 and the side wall of the grip portion 22 to form a vibration damping system in a narrow space, thereby further reducing the vibration and impact of the impact wrench 100 during operation, so as to reduce the vibration effect.

The present invention is not limited to the specific embodiments described above. Those skilled in the art can easily understand that, without departing from the principles and scope of the present invention, there are many alternative solutions for the impact wrench of the present invention. The protection scope of the present invention is subject to the content of the claims.

Claims (10)

1. An impact wrench comprising a housing and a handle connected to the housing; the method is characterized in that: the impact wrench comprises an impact wrench and a motor, wherein the impact wrench comprises a shell, a handle and a spring, the shell comprises a main body part for containing the motor and a boss part protruding downwards from the bottom of the main body part, the handle comprises a sleeve part sleeved on the periphery of the main body part and a holding part positioned below the sleeve part, the sleeve part surrounds the outer side of the main body part, the holding part is provided with a side wall and a hollow cavity formed by the side wall in a surrounding mode, the boss part is positioned in the hollow cavity, the impact wrench comprises an elastic piece positioned between the boss part and the side wall of the holding part, one end of the elastic piece abuts against the side wall of the holding part, and the other end of the elastic.

2. The impact wrench of claim 1, wherein: the main body part comprises a middle part which is positioned in the middle section and is inwards recessed from the outer periphery, the sleeve part is covered on the outer periphery of the middle part, and a gap is formed between the sleeve part and the middle part.

3. The impact wrench of claim 2, wherein: the inner diameter of the sleeve part is not smaller than the outer diameter of the middle part of the main body part, the inner diameter of the sleeve part is smaller than the outer diameter of the main body part outside two ends of the middle part, the main body part is provided with protrusions located at two ends of the middle part, and the protrusions are used for preventing the sleeve part from moving axially.

4. The impact wrench of claim 1, wherein: the holding part is provided with a groove which is inwards sunken from the side wall and is arranged corresponding to the protruding part, and the groove accommodates the elastic piece.

5. The impact wrench of claim 4, wherein: the handle comprises a left shell and a right shell which are matched with each other, the left shell is provided with a left sleeve portion and a left holding portion located below the left sleeve portion, the right shell is provided with a right sleeve portion and a right holding portion located below the right sleeve portion, the left sleeve portion and the right sleeve portion are matched to form the sleeve portion, and the left holding portion and the right holding portion are matched to form the holding portion.

6. The impact wrench of claim 5, wherein: the protruding portion is provided with a mounting hole formed by sinking the surface facing the side wall of the holding portion, the mounting hole is arranged corresponding to the groove of the holding portion, one end of the elastic piece is contained in the mounting hole, and the other end of the elastic piece is contained in the groove.

7. The impact wrench of claim 6, wherein: the mounting holes comprise a first mounting hole formed by sinking from the surface facing the side wall of the left holding part and a second mounting hole formed by sinking from the surface facing the side wall of the right holding part, and the first mounting hole and the second mounting hole are not communicated with each other.

8. The impact wrench of claim 5, wherein: the top of the left sleeve part is provided with a left matching part, the top of the right sleeve part is provided with a right matching part, and the left matching part and the right matching part are arranged correspondingly to each other and are connected and matched through a fastener.

9. The impact wrench of claim 8, wherein: the bottom of the left sleeve part and the left holding part are provided with at least one left matching part, the bottom of the right sleeve part and the right holding part are provided with at least one right matching part, and the at least one left matching part and the at least one right matching part are arranged correspondingly to each other and are connected and matched through a fastener.

10. The impact wrench of claim 8 or 9, wherein: one of the left matching part and the right matching part is provided with a through hole which penetrates through transversely, the other one of the left matching part and the right matching part is provided with a threaded hole which is sunken inwards transversely, the fastening piece is a screw, and the fastening piece penetrates through the through hole and is fixed with the threaded hole in a threaded connection mode.

Images