CN212071751U

CN212071751U - Brushless electric wrench

Info

Publication number: CN212071751U
Application number: CN201922057878.XU
Authority: CN
Inventors: 胡志春; 龙啸; 丁金福
Original assignee: Zhejiang Kaichuang Electric Co ltd
Current assignee: Zhejiang Kaichuang Electric Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-12-04
Anticipated expiration: 2029-11-25

Abstract

The utility model belongs to the technical field of mechanical tool, concretely relates to brushless electric wrench. The utility model discloses a brushless electric wrench includes: a head shell and a reduction gearbox; an opening for an output shaft to pass through is formed in one end of the head shell, the other end of the head shell is fixedly connected with the reduction gearbox, and a sealing gasket is arranged at the joint of the head shell and the reduction gearbox; an impact block assembly is arranged in the reduction gearbox and rotates, and the impact block assembly drives the output shaft to rotate. The utility model discloses an among the brushless electric wrench, first shell and reducing gear box fixed connection, and first shell and reducing gear box junction are provided with sealed the pad, and sealed pad compressive deformation reduces the gap between first shell and the reducing gear box, reaches the condition that prevents the lubricating oil in the reducing gear box and reveals, has the effectual and simple structure's of leak protection advantage.

Description

Brushless electric wrench

Technical Field

The utility model belongs to the technical field of mechanical tool, concretely relates to brushless electric wrench.

Background

The existing brushless electric wrench has the principle that when a motor runs, a rotor drives a planetary gear, and the planetary gear drives an impact block assembly to rotate and impact an output shaft to output impact torque.

However, the existing head shell and the reduction gearbox directly contact with each other to generate a gap due to machining errors, so that lubricating oil in the reduction gearbox leaks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving at least the problem that direct contact can produce the gap because of machining error between current head shell and the reducing gear box, causes the lubricating oil in the reducing gear box to reveal. The purpose is realized by the following technical scheme:

a first aspect of the present invention provides a brushless electric wrench, which includes a head housing and a reduction box;

an opening for an output shaft to pass through is formed in one end of the head shell, the other end of the head shell is fixedly connected with the reduction gearbox, and a sealing gasket is arranged at the joint of the head shell and the reduction gearbox;

an impact block assembly is arranged in the reduction gearbox and rotates, and the impact block assembly drives the output shaft to rotate.

According to the utility model discloses an among the brushless electric wrench, head shell and reducing gear box fixed connection, and head shell and reducing gear box junction are provided with sealed the pad, and sealed pad compressive deformation reduces the gap between head shell and the reducing gear box, reaches the condition that prevents the lubricating oil in the reducing gear box and reveals, has the effectual and simple structure's of leak protection advantage.

In addition, according to the utility model discloses a brushless electric wrench, still can have following additional technical characterstic:

in some embodiments of the present invention, the reduction box is provided with a groove corresponding to the head shell, the head shell is provided with a boss matching with the groove, and the sealing gasket is located between the boss and the groove.

In some embodiments of the present invention, the head shell and the reduction gearbox are fixedly connected by screws.

In some embodiments of the present invention, the brushless electric wrench further comprises a rear housing connected to the reduction box, wherein a rotor and a stator are disposed in the rear housing, and the rotor drives the impact block assembly to rotate through the planetary gear.

In some embodiments of the present invention, a damper is disposed on the stator.

The utility model discloses an in some embodiments, the damping piece is the damping rubber post, be provided with the fixed slot along its circumference on the stator, the damping rubber post cover is established in the fixed slot.

In some embodiments of the present invention, the rear shell and the head shell bottom are provided with a casing, and the casing bottom is wrapped with a buffer member.

In some embodiments of the present invention, the bottom of the casing is provided with an embedding groove, and the buffer member is embedded in the embedding groove.

In some embodiments of the present invention, the buffer member is made of metal.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically illustrates an external schematic view of a brushless electric wrench according to an embodiment of the present invention;

figure 2 schematically illustrates an internal schematic view of a brushless electric wrench, according to an embodiment of the present invention;

fig. 3 schematically shows a partial enlarged schematic view of a in fig. 2.

The reference numerals in the drawings denote the following:

1: a rotor; 2: a reduction gearbox; 3: a gasket; 4: an impact block assembly; 5: a head shell; 6: an output shaft; 7: a stator; 8: a shock-absorbing rubber column; 9: a housing; 10: a planetary gear.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The utility model discloses a first aspect provides a brushless electric wrench, and this brushless electric wrench is used for preventing lubricating oil from revealing.

As shown in fig. 1 and 2, the brushless electric wrench in the present embodiment includes: a head shell and a reduction gearbox;

one end of the head shell 5 is provided with an opening for the output shaft 6 to pass through, the other end of the head shell 5 is fixedly connected with the reduction gearbox 2, and a sealing gasket 3 is arranged at the joint of the head shell 5 and the reduction gearbox 2;

an impact block assembly 4 is arranged in the reduction gearbox 2 to rotate, and the impact block assembly 4 drives an output shaft 6 to rotate.

When the load is increased, the impact block assembly 4 drives the output shaft 6 to move along the axial direction of the output shaft 6 when rotating.

The utility model discloses an among the brushless electric wrench, first shell 5 and 2 fixed connection of reducing gear box, and first shell 5 and 2 junctions of reducing gear box are provided with sealed the pad 3, and sealed pad 3 compressive deformation reduces the gap between first shell 5 and the reducing gear box 2, reaches the condition that prevents lubricating oil in the reducing gear box 2 and reveals, has the effectual and simple structure's of leak protection advantage.

As shown in fig. 3, in some embodiments of the present invention, a groove is provided on the reduction box 2 corresponding to the head casing 5, a boss matching with the groove is provided on the head casing 5, and the sealing pad 3 is located between the boss and the groove.

The reducing gear box 2 is provided with the recess with first shell 5 junction, is close to the outside, is provided with the boss that matches with the recess on first shell 5, sets up the recess boss card of being convenient for on the recess, can be better prevent that the lubricating oil in the reducing gear box 2 from revealing, in addition, is provided with sealed pad 3 between boss and recess, fixed seal pad 3 that can be better.

In some embodiments of the present invention, the head housing 5 and the reduction gearbox 2 are fixedly connected by screws.

Adopt the screw fixation can be better with sealed 3 compressive deformation of filling up to reduce the gap between head shell 5 and reducing gear box 2.

In some embodiments of the present invention, the brushless electric wrench further comprises a rear casing connected to the reduction box 2, the rear casing is provided with a rotor 1 and a stator 7, and the rotor 1 drives the impact block assembly 4 to rotate through the planetary gear 10.

When the motor runs, the rotor 1 drives the planetary gear 10, and the planetary gear 10 drives the impact block assembly 4 to rotate and impact the output shaft 6 to output impact torque. The prior art is that the impact block assembly 4 rotates to impact the output shaft 6, the motor drives the central shaft to rotate after being decelerated, the steel balls on two sides of the central shaft move in the herringbone groove to cause the impact (striking) of the impact block assembly 4 on the output shaft 6, and after the impact, the spring returns to enable the impact block assembly 4 to rebound to the initial position.

In some embodiments of the present invention, the stator 7 is provided with a damping member. The arrangement of the damping piece can reduce the damage of the working vibration of the machine to the stator 7.

The utility model discloses an in some embodiments, the damping piece is damping rubber post 8, is provided with the fixed slot along its circumference on stator 7, and 8 covers of damping rubber post are established in the fixed slot. The fixing grooves are arranged so that the damping rubber columns 8 can be fixed on the stator 7 conveniently.

In some embodiments of the present invention, the bottom of the back shell and the head shell 5 is provided with a casing 9, and the bottom of the casing 9 is wrapped with a buffer member.

Set up the risk that casing 9 damaged when the bumper piece can prevent brushless wrench from falling.

In some embodiments of the present invention, the bottom of the housing 9 is provided with an embedding groove, and the buffer member is embedded in the embedding groove.

In some embodiments of the present invention, the buffer member is made of metal. The effect of preventing damage by arranging metal is better.

The utility model discloses a brushless electric wrench adds sealed pad 3 between head shell 5 and the reducing gear box 2 and is used for preventing the oil leak. The shock absorption rubber column 8 is additionally arranged on the motor stator 7, so that the vibration of the motor during working is reduced. The handle position of casing 9 bottom increases the bolster, improves the risk that casing 9 damaged when falling.

To sum up, the utility model discloses an among the brushless electric wrench, head shell 5 and 2 fixed connection of reducing gear box, and head shell 5 and 2 junctions of reducing gear box are provided with sealed the pad 3, and the sealed pad 3 compressive deformation reduces the gap between head shell 5 and the reducing gear box 2, reaches the condition that prevents lubricating oil in the reducing gear box 2 and reveals, has the effectual and simple structure's of leak protection advantage.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A brushless electric wrench is characterized by comprising a head shell and a reduction box;

2. The brushless electric wrench as claimed in claim 1, wherein the reduction box is provided with a groove corresponding to the head housing, the head housing is provided with a boss matching with the groove, and the sealing pad is located between the boss and the groove.

3. The brushless electric wrench as recited in claim 1, wherein the head housing is fixedly connected to the reduction gearbox by screws.

4. The brushless electric wrench as claimed in claim 1, further comprising a rear housing connected to the reduction box, wherein a rotor and a stator are disposed in the rear housing, and the rotor drives the striking block assembly to rotate through a planetary gear.

5. The brushless electric wrench of claim 4, wherein the stator is provided with a damper.

6. The brushless electric wrench as claimed in claim 5, wherein the shock absorbing member is a shock absorbing rubber column, and the stator is provided with a fixing groove along a circumferential direction thereof, and the shock absorbing rubber column is fitted in the fixing groove.

7. The brushless electric wrench as claimed in claim 4, wherein the rear housing and the bottom of the head housing are provided with a housing, and the bottom of the housing is covered with a buffer.

8. The brushless electric wrench as claimed in claim 7, wherein the bottom of the housing is provided with an insertion groove, and the buffer member is inserted into the insertion groove.

9. The brushless electric wrench of claim 7, wherein the buffer is made of metal.