Electric tool with handle damping structure

Abstract

The utility model discloses an electric tool with a handle damping structure. The electric tool comprises a motor shell, a driving motor, a transmission assembly, an output shaft and a handle. The handle is provided with a containing cavity, and the top wall of the containing cavity is limited by the lower end face of the motor shell. A damping block is arranged in the containing cavity and elastically connected with the inner wall of the containing cavity through an elastic piece. According to the electric tool with the handle damping structure, by arranging the damping block and the elastic piece, vibration on the handle and the motor shell can be counteracted, and the holding comfort of the electric tool is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tools, and in particular relates to an electric tool with a handle shock-absorbing structure. Background Art

[0002] When using a power tool, the transmission assembly and the transmission shaft will reciprocate in the axial direction and impact. The handle will vibrate violently due to the impact between the two, resulting in increased vibration in the gripping part of the handle. The vibration caused by the impact will affect the grip feel of the entire machine during use, and excessive vibration will also cause the wrench or drill bit connected to the transmission shaft to easily deviate, causing the entire machine to fail to work. Moreover, as the torque increases, the vibration of the entire machine and the deviation during operation will become more obvious and seriously affect the working efficiency of the power tool.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The utility model aims to provide an electric tool with a handle shock-absorbing structure, which can offset the vibration of the electric tool and improve the comfort of holding the handle.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides an electric tool with a handle shock-absorbing structure, which includes: a motor housing, a driving motor, a transmission assembly, an output shaft and a handle; the handle has a accommodating cavity and the top wall of the accommodating cavity is limited by the lower end surface of the motor housing; a shock-absorbing block is arranged in the accommodating cavity and the shock-absorbing block is elastically connected to the inner wall of the accommodating cavity through an elastic member.

[0006] In one or more embodiments of the present invention, the elastic member is disposed between the upper surface of the shock absorbing block and the top wall of the accommodating cavity, and between the lower surface of the shock absorbing block and the bottom wall of the accommodating cavity.

[0007] In one or more embodiments of the present utility model, the shock absorbing block includes a base and a plurality of limiting columns arranged on the base.

[0008] In one or more embodiments of the present invention, the limiting column is arranged on the upper surface of the base and protrudes from the upper surface along the height direction of the shock absorbing block, one end of the elastic member is against the top wall of the accommodating cavity, and the other end thereof is sleeved on the limiting column; and / or,

[0009] The limiting post is arranged on the lower surface of the base and protrudes from the lower surface along the height direction of the shock-absorbing block. One end of the elastic member abuts against the bottom wall of the accommodating cavity, and the other end is sleeved on the limiting post.

[0010] In one or more embodiments of the present invention, a limiting groove is formed on the top wall of the accommodating cavity, and at least a part of one end of the elastic member abuts in the limiting groove; and / or,

[0011] A limiting groove is formed on the bottom wall of the accommodating cavity, and at least a part of one end of the elastic member abuts in the limiting groove.

[0012] In one or more embodiments of the present invention, the base is a rectangular base, and the shock-absorbing block further includes a supporting wall which is arranged along the circumference of the rectangular base to provide front and rear surfaces and left and right surfaces for the shock-absorbing block.

[0013] In one or more embodiments of the present invention, the elastic member is arranged between the front surface of the shock-absorbing block and the front wall of the accommodating cavity and between the rear surface of the shock-absorbing block and the rear wall of the accommodating cavity along the length direction of the shock-absorbing block.

[0014] In one or more embodiments of the present invention, the elastic member is arranged between the right surface of the shock-absorbing block and the right wall of the accommodating cavity and between the left surface of the shock-absorbing block and the left wall of the accommodating cavity along the width direction of the shock-absorbing block.

[0015] In one or more embodiments of the present invention, the motor housing and the handle are detachably connected.

[0016] In one or more embodiments of the present invention, a plurality of downwardly extending fixing parts are arranged on the lower end surface of the motor housing. Fixing holes are formed in the fixing parts along the radial direction of the motor housing. A plurality of fixing grooves matching with the fixing holes are formed in the handle. Elastic connecting pieces are inserted into the fixing holes and the fixing grooves for connecting the motor housing and the handle.

[0017] Compared with the prior art, the power tool with a handle shock-absorbing structure of the present invention can offset the vibration on the handle and the motor housing by arranging the shock-absorbing block and the elastic member. The limiting post arranged on the shock-absorbing block and the limiting groove on the inner wall of the accommodating cavity can limit the movement of the elastic member to ensure that the elastic force of the elastic member is always in the vibration direction to be offset. In addition, the elastic connecting piece between the motor housing and the handle can cooperate with the shock-absorbing block to offset the vibration, further improving the holding comfort of the handle. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of a power tool with a handle shock-absorbing structure in an embodiment of the present invention;

[0020] Figure 2 Cross-sectional view of a power tool with a handle shock-absorbing structure in an embodiment of the present invention;

[0021] Figure 3 Exploded view of a power tool with a handle shock-absorbing structure in an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of a shock-absorbing block in an embodiment of the present invention.

[0023] Main reference numerals description:

[0024] 1 - Motor housing, 11 - Fixed part, 12 - Fixed hole, 2 - Driving motor, 3 - Transmission component, 4 - Output shaft, 5 - Handle, 51 - Fixed groove, 6 - Accommodating cavity, 61 - Limiting groove, 7 - Shock-absorbing block, 71 - Base, 72 - Limiting post, 73 - Support wall, 8 - Elastic member, 9 - Elastic connecting member. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] As Figures 1-4 shown, a power tool with a handle shock-absorbing structure in an embodiment of the present invention includes: a motor housing 1, a driving motor 2, a transmission component 3, an output shaft 4, and a handle 5. The handle 5 has an accommodating cavity 6 and the top wall of the accommodating cavity 6 is defined by the lower end surface of the motor housing 1. Specifically, the lower end surface of the motor housing 1 can be the top wall of the accommodating cavity 6. A shock-absorbing block 7 is arranged in the accommodating cavity 6 and the shock-absorbing block 7 is elastically connected to the inner wall of the accommodating cavity 6 through an elastic member 8 for offsetting the vibration generated by the power tool.

[0027] The working principle of the shock-absorbing block 7 is as follows: During operation, the transmission assembly 3 and the output shaft 4 of the power tool generate relatively strong vibrations, and the vibrations increase as the torque of the drive motor 2 increases. The vibrations are transmitted through the motor housing 1 to the handle 5 connected thereto, so that the holder will feel severe vibrations, resulting in poor holding feeling or inability to stably hold the power tool. The shock-absorbing block 7 is arranged in the accommodation cavity 7 of the handle 5 through an elastic member 8. When the vibrations are transmitted from the motor housing 1 to the handle 5, the shock-absorbing block 7 in the handle 5 will vibrate under the influence of the transmission assembly 3 and the output shaft 4. With the cooperation of the elastic member 8, the shock-absorbing block 7 will vibrate at the same frequency as the handle 5 and the motor housing 1 and cancel out the vibrations of the handle 5 and the motor housing 1, thereby improving the comfort of holding.

[0028] In the above embodiment, for the power tool with a handle shock-absorbing structure of the present invention, by arranging the shock-absorbing block 7 and the elastic member 8, the vibrations of the power tool can be cancelled out, reducing the vibrations on the handle 5, thereby improving the holding comfort of the power tool.

[0029] As Figure 2 shown, in one embodiment, the specific implementation of the elastic member 8 can be: The elastic member 8 is arranged between the upper surface of the shock-absorbing block 7 and the top wall of the accommodation cavity 6, and between the lower surface of the shock-absorbing block 7 and the bottom wall of the accommodation cavity 6. When the power tool vibrates, the shock-absorbing block 7 and the elastic member 8 arranged along the height direction of the shock-absorbing block 7 can cancel out the vibrations, especially the vibrations in the height direction (i.e., Figure 3 the Z-axis direction in

[0030] As Figure 4 shown, the shock-absorbing block 7 includes a base 71 and a plurality of limiting columns 72 arranged on the base 71 for fixing the elastic member 8.

[0031] Furthermore, the limiting columns 72 are arranged on the upper surface of the base 71 and protrude from the upper surface in the height direction of the shock-absorbing block 7. One end of the elastic member 8 abuts against the top wall of the accommodation cavity 6, and the other end is sleeved on the limiting column 72. Similarly, the limiting columns 72 can also be arranged on the lower surface of the base 71 and protrude from the lower surface in the height direction of the shock-absorbing block 7. One end of the elastic member 8 abuts against the bottom wall of the accommodation cavity 6, and the other end is sleeved on the limiting column 72. The limiting columns 72 can prevent the elastic member 8 from sliding relative to the surface of the shock-absorbing block 7, thereby ensuring that the elastic force of the elastic member 8 always acts along the height direction of the shock-absorbing block 7.

[0032] To prevent the elastic member 8 from sliding relative to the inner wall of the accommodating cavity 6, a limiting groove 61 can be formed in the top wall of the accommodating cavity 6, and at least a part of one end of the elastic member 8 abuts against the limiting groove 61 in the top wall. Similarly, a limiting groove 61 can also be formed in the bottom wall of the accommodating cavity 6, and at least a part of one end of the elastic member 8 abuts against the limiting groove 61 in the bottom wall. The limiting groove 61 can prevent the end of the elastic member 8 that abuts against the inner wall of the accommodating cavity 6 from sliding, and can also ensure that the elastic force of the elastic member 8 always acts in the height direction of the shock-absorbing block 7.

[0033] As Figure 3 and Figure 4 shown, the base 71 is a rectangular base 71. The shock-absorbing block 7 further includes a support wall 73. The support wall 73 is arranged along the circumferential direction of the rectangular base 71. The support wall 73 can serve as the front, rear, left, and right surfaces of the shock-absorbing block 7.

[0034] It can be conceived that in addition to being arranged on the upper and lower surfaces of the shock-absorbing block 7, the elastic member 8 can also be arranged on other surfaces of the shock-absorbing block 7. In an embodiment, the elastic member 8 is arranged between the front surface of the shock-absorbing block 7 and the front wall of the accommodating cavity 6 and between the rear surface of the shock-absorbing block 7 and the rear wall of the accommodating cavity 6 along the length direction of the shock-absorbing block 7 (i.e., the direction of the X axis in the figure).

[0035] Similarly, a second limiting post (not shown in the figure) extending along the length direction can be provided on the front surface of the shock-absorbing block 7. One end of the elastic member 8 abuts against the front wall of the accommodating cavity 6, and the other end is connected to the second limiting post. A second limiting post (not shown in the figure) extending along the length direction is provided on the rear surface of the shock-absorbing block 7. One end of the elastic member 8 abuts against the rear wall of the accommodating cavity 6, and the other end is connected to the second limiting post.

[0036] Arranging the elastic member 8 along the length direction on the front and rear surfaces of the shock-absorbing block 7 can cancel out the vibration of the power tool, especially the vibration in the length direction.

[0037] In another embodiment, the elastic member 8 is arranged between the right surface of the shock-absorbing block 7 and the right wall of the accommodating cavity 6 and between the left surface of the shock-absorbing block 7 and the left wall of the accommodating cavity 6 along the width direction of the shock-absorbing block 7.

[0038] Specifically, a third limiting post (not shown in the figure) extending along the width direction (i.e., Figure 3 the direction of the Y axis in the figure) is provided on the right surface of the shock-absorbing block 7. One end of the elastic member 8 abuts against the right wall of the accommodating cavity 6, and the other end is connected to the third limiting post. A third limiting post extending along the width direction of the shock-absorbing block 7 is provided on the left surface of the shock-absorbing block 7. One end of the elastic member 8 abuts against the left wall of the accommodating cavity 6, and the other end is connected to the third limiting post. Arranging the elastic member 8 along the length direction on the left and right surfaces of the shock-absorbing block 7 can cancel out the vibration of the power tool, especially the vibration in the width direction.

[0039] In the above embodiments, the elastic member 8 can be provided in only one direction of the shock-absorbing block 7 or in multiple directions of the shock-absorbing block 7, so as to select a suitable setting method according to the size of the accommodation space of the accommodation cavity 6 in different power tools. In addition, the elastic member 8 can also be a compression spring, a rubber member or other elastic members 8 with shock-absorbing effects.

[0040] In one embodiment, to further reduce the vibration on the handle 5 and the motor housing 1, the handle 5 and the motor housing 1 are designed as a split type and are detachably connected, and the two are connected by an elastic connecting member 9 to further reduce the vibration transmitted from the motor housing 1 to the handle 5. Specifically, as shown in Figure 3 As shown, a plurality of fixing portions 11 extending downward are provided on the lower end surface of the motor housing 1. Fixing holes 12 are formed in the fixing portions 11 along the radial direction of the motor housing 1. A plurality of fixing grooves 51 matching the fixing holes 12 are formed in the handle 5. An elastic connecting member 9 is inserted into the fixing holes 12 and the fixing grooves 51 for connecting the motor housing 1 and the handle 5. The elastic connecting member 9 can be a rubber connecting member or other connecting members that can play a shock-absorbing role, so as to cooperate with the shock-absorbing block 7 to cancel the vibration and improve the holding comfort of the handle 5.

[0041] In summary, the power tool with a handle shock-absorbing structure can cancel the vibration on the handle 5 and the motor housing 1 by providing the shock-absorbing block 7 and the elastic member 8. The limiting posts 72 provided on the shock-absorbing block 7 and the limiting grooves 61 on the inner wall of the accommodation cavity 6 can limit the movement of the elastic member 8 to ensure that the elastic force of the elastic member 8 is always in the vibration direction that needs to be cancelled. In addition, the elastic connecting member 9 between the motor housing 1 and the handle 5 can cooperate with the shock-absorbing block 7 to cancel the vibration and further improve the holding comfort of the handle 5.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0043] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric tool with a handle shock absorbing structure, comprising: A motor housing (1), a drive motor (2), a transmission assembly (3), an output shaft (4) and a handle (5), characterized in that the handle (5) has a receiving cavity (6) and the top wall of the receiving cavity (6) is defined by the lower end surface of the motor housing (1); a shock absorbing block (7) is arranged in the receiving cavity (6) and the shock absorbing block (7) is elastically connected to the inner wall of the receiving cavity (6) via an elastic member (8).

2. The electric tool with a handle shock absorbing structure according to claim 1, characterized in that: The elastic member (8) is arranged between the upper surface of the shock absorbing block (7) and the top wall of the accommodating cavity (6), and between the lower surface of the shock absorbing block (7) and the bottom wall of the accommodating cavity (6).

3. The electric tool with a handle shock absorbing structure according to claim 2, characterized in that: The shock absorbing block (7) comprises a base (71) and a plurality of limiting columns (72) arranged on the base (71).

4. The electric tool with a handle shock absorbing structure according to claim 3, characterized in that: The limiting column (72) is arranged on the upper surface of the base (71) and protrudes from the upper surface along the height direction of the shock absorbing block (7); one end of the elastic member (8) is abutted against the top wall of the accommodating cavity (6), and the other end is sleeved on the limiting column (72); and / or, The limiting column (72) is arranged on the lower surface of the base (71) and protrudes from the lower surface along the height direction of the shock absorbing block (7); one end of the elastic member (8) is abutted against the bottom wall of the accommodating cavity (6), and the other end is sleeved on the limiting column (72).

5. The electric tool with a handle shock absorbing structure according to claim 3, characterized in that: A limiting groove (61) is provided on the top wall of the accommodating cavity (6), and one end of the elastic member (8) is at least partially disposed in the limiting groove (61); and / or, The bottom wall of the accommodating cavity (6) is provided with a limiting groove (61), and one end of the elastic member (8) is at least partially disposed in the limiting groove (61).

6. The electric tool with a handle shock absorbing structure according to claim 3, characterized in that: The base (71) is a rectangular base (71), and the shock absorbing block (7) further comprises a supporting wall (73), wherein the supporting wall (73) is arranged along the circumference of the rectangular base (71) to provide front and rear surfaces and left and right surfaces for the shock absorbing block (7).

7. The electric tool with a handle shock absorbing structure according to claim 1, characterized in that: The elastic member (8) is arranged between the front surface of the shock absorbing block (7) and the front wall of the accommodating chamber (6) and between the rear surface of the shock absorbing block (7) and the rear wall of the accommodating chamber (6) along the length direction of the shock absorbing block (7).

8. The electric tool with a handle shock absorbing structure according to claim 1, characterized in that: The elastic member (8) is arranged between the right surface of the shock absorbing block (7) and the right wall of the accommodating chamber (6) and between the left surface of the shock absorbing block (7) and the left wall of the accommodating chamber (6) along the width direction of the shock absorbing block (7).

9. The electric tool with a handle shock absorbing structure according to claim 1, characterized in that: The motor housing (1) and the handle (5) are connected in a split manner.

10. The electric tool with a handle shock absorbing structure according to claim 9, characterized in that: The lower end surface of the motor housing (1) is provided with a plurality of fixing portions (11) extending downwards, the fixing portions (11) are provided with fixing holes (12) along the radial direction of the motor housing (1), the handle (5) is provided with a plurality of fixing grooves (51) matching with the fixing holes (12), and elastic connecting members (9) are inserted into the fixing holes (12) and the fixing grooves (51).

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