Electric tool output structure and electric tool

Abstract

The utility model relates to an electric tool output structure and an electric tool. Comprising a tool chuck; the shell is provided with a cavity with an opening in the front end, and a bearing capable of rotatably supporting the tool chuck is installed at the opening of the cavity; the periphery of the supporting section is sleeved with the sealing ring, and an annular groove for positioning the sealing ring is formed in the periphery of the supporting section; the periphery of the sealing ring abuts against the inner hole wall of the bearing. The locking piece is configured to lock the screwdriver bit by abutting against the periphery of the screwdriver bit in the radial direction; a locking hole which extends in the radial direction and is communicated with the polygonal inner hole is formed in the bottom wall of the annular groove so that the locking piece can do radial movement; the sealing ring has elasticity, and when the screwdriver bit is inserted into the polygonal inner hole, the sealing ring extrudes the locking piece towards the screwdriver bit so as to lock the screwdriver bit. According to the technical scheme, not only can the sleeve be installed, but also the screwdriver bit can be installed, and the wrench output structure is simple and compact in structure and short in axial length.

Description

Technical Field

[0001] The present application relates to the technical field of power tools, and particularly to an output structure of a power tool and a power tool. Background Art

[0002] There are various types of power tools, which are widely used in various fields of industrial manufacturing. An electric wrench is a widely used handheld power tool. The electric wrench can not only install a socket wrench head to tighten nuts, external hexagon bolts, etc., but also install a screwdriver bit to tighten cross-slot screws, internal hexagon screws, etc. However, for the existing electric wrenches in the prior art, generally two methods are adopted to achieve the above functions. One is to design two tool chucks that respectively hold the socket wrench head and the screwdriver bit, and replace them during use to adapt to the socket wrench head or the screwdriver bit, which is inconvenient in working scenarios such as maintenance and outdoors. The other is to achieve it on the same tool chuck, but the structure is relatively complex, and the axial length of the tool chuck is relatively long, which affects the miniaturization and light weight of the power tool. Summary of the Invention

[0003] In view of this, the present application provides an output structure of a power tool and a power tool to solve at least one problem in the background art.

[0004] To achieve the above object, the technical solution of the present application is realized as follows:

[0005] In a first aspect, an embodiment of the present application provides an output structure of a power tool, including:

[0006] A tool chuck having a polygonal outer prism for installing a socket and a polygonal inner hole for installing a screwdriver bit;

[0007] A housing having a chamber with an open front end, and a bearing for rotatably supporting the tool chuck is installed at the opening of the chamber; the tool chuck includes a support section inserted into the inner hole of the bearing, and the support section is located behind the polygonal outer prism on the outer periphery of the tool chuck;

[0008] A sealing ring sleeved on the outer periphery of the support section, and an annular groove for positioning the sealing ring is provided on the outer periphery of the support section; the outer periphery of the sealing ring abuts against the inner hole wall of the bearing;

[0009] A locking member configured to lock the screwdriver bit by radially abutting against the outer periphery of the screwdriver bit. At least two locking members are provided and are evenly distributed in the circumferential direction of the support section; a locking hole extending radially and communicating with the polygonal inner hole is provided on the bottom wall of the annular groove for the locking member to move radially; the sealing ring has elasticity, and when the screwdriver bit is inserted into the polygonal inner hole, the sealing ring presses the locking member towards the screwdriver bit to lock the screwdriver bit.

[0010] Optionally, the polygonal outer prism is a quadrangular prism, and the polygonal inner hole is an internal hexagonal hole.

[0011] Optionally, the support section is in interference fit with the inner hole of the bearing.

[0012] Optionally, the bearing is an oil-impregnated bearing.

[0013] Optionally, a first circlip is provided on the outer wall of the oil-impregnated bearing, and a first circlip groove for accommodating the first circlip is provided on the inner wall at the opening. Through the cooperation of the first circlip and the first circlip groove, axial positioning of the oil-impregnated bearing is achieved.

[0014] Optionally, the sealing ring is an O-ring.

[0015] Optionally, the locking member is a ball head pin, and the number is 2. The ball head pins are symmetrically arranged on both sides of the polygonal inner hole; when the screwdriver bit is inserted into the polygonal inner hole, the ball head pins are radially outwardly moved under the extrusion of the screwdriver bit and squeeze the sealing ring to cause local deformation, and the ball head pins change their positions radially outward to allow the screwdriver bit to be inserted into the polygonal inner hole; the locking hole communicates with the polygonal inner hole, and the ball head pins are pressed into the polygonal inner hole by the elastic force of the sealing ring to lock the screwdriver bit; when the screwdriver bit is removed from the polygonal inner hole, the ball head pins are radially outwardly moved under the extrusion of the screwdriver bit and squeeze the sealing ring to cause local deformation, and the ball head pins change their positions radially outward to allow the screwdriver bit to be removed from the polygonal inner hole.

[0016] Optionally, in the axial direction of the polygonal inner hole, the distance between the locking hole and the bottom wall of the polygonal inner hole is set according to the tail size of the screwdriver bit, so that when the locking member locks the screwdriver bit, the bottom wall of the polygonal inner hole supports the tail of the screwdriver bit.

[0017] Optionally, a second circlip for positioning the axial position of the sleeve is provided at the front end of the tool chuck, and the outer diameter dimension of the second circlip is adapted to the second circlip groove of the sleeve.

[0018] In a second aspect, an embodiment of the present application provides a power tool, including:

[0019] A motor;

[0020] A gearbox, the input end of which is connected to the rotating shaft of the motor, and the output end extends towards the load end;

[0021] Any one of the above-mentioned power tool output structures, the rear end of the tool chuck is connected to the output end of the gearbox.

[0022] The output structure of an electric tool and the electric tool provided in the embodiment of the present application include: a tool chuck having a polygonal outer prism for mounting a sleeve and a polygonal inner hole for mounting a screwdriver bit; a housing having a chamber with a front end opening, a bearing rotatably supporting the tool chuck being mounted at the opening of the chamber; the tool chuck comprising a support section inserted into the inner hole of the bearing, the support section being located behind the polygonal outer prism on the outer periphery of the tool chuck; a sealing ring sleeved on the outer periphery of the support section, an annular groove for positioning the sealing ring being provided on the outer periphery of the support section; the outer periphery of the sealing ring abutting against the inner hole wall of the bearing; a locking member configured to lock the screwdriver bit by radially abutting against the outer periphery of the screwdriver bit, the locking member being provided with at least two members and uniformly distributed in the circumferential direction of the support section; a locking hole extending radially and connected to the polygonal inner hole being provided on the bottom wall of the annular groove for radial movement of the locking member; the sealing ring is elastic, and when the screwdriver bit is inserted into the polygonal inner hole, the sealing ring presses the locking member toward the screwdriver bit to lock the screwdriver bit. It can be seen that the power tool output structure and the power tool of the embodiment of the present application are provided with a polygonal outer prism for installing a sleeve and a polygonal inner hole for installing a screwdriver head, and a locking member for locking the screwdriver head by radially abutting the outer periphery of the screwdriver head, and a sealing ring for clamping the outer end of the locking member, that is, through the elastic force of the sealing ring, the locking member is provided with power to lock the position of the screwdriver head; in this way, the sealing ring can not only play a sealing role, but also provide locking power, without the need to set other power, and the axial length of the tool chuck is shortened. Therefore, the power tool output structure and the power tool of the embodiment of the present application can not only install a sleeve, but also install a screwdriver head, and the structure of the wrench output structure is simple, compact, and short in axial length.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A schematic diagram of an electric tool provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of

[0027] Figure 3 A schematic diagram of an output structure of an electric tool provided in an embodiment of the present application;

[0028] Figure 4 is Figure 3 a partial enlarged schematic view at position A in

[0029] Figure 5 an exploded schematic view (disassembly schematic view) of the output structure of the power tool provided by the embodiment of the present application.

[0030] Description of the reference numerals:

[0031] 10, tool chuck; 11, polygonal outer prism; 12, polygonal inner hole; 13, support section; 14, annular groove; 15, locking hole; 16, second snap ring; 20, housing; 21, bearing; 22, first snap ring; 23, first snap ring groove; 30, sealing ring; 40, locking member; 50, screwdriver bit; 60, shock-absorbing washer; 70, motor; 80, gearbox. Detailed implementation manners

[0032] To make the technical solutions and beneficial effects of the present application more obvious and understandable, the following will be described in detail by listing specific embodiments. Among them, the drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical and scientific fields to which the present application belongs.

[0033] In the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of simplifying the description of the present application, rather than indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, that is, it cannot be understood as a limitation to the present application.

[0034] In the present application, the terms "first" and "second" are only used for the purpose of clear description, and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined with "first" and "second" can clearly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc.; the meaning of "several" is at least one, such as one, two, three, etc.; unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly defined, terms such as "installed", "connected", "linked", "fixed", "set", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and can also be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In this application, unless otherwise clearly defined, when the first feature is "on", "above", "over", "upward", "under", "beneath", "below", or "downward" of the second feature, the first feature and the second feature can be in direct contact, or the first feature and the second feature can be indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "over", or "upward" of the second feature, the first feature can be directly above or obliquely above the second feature, or simply indicate that the horizontal height of the first feature is higher than the horizontal height of the second feature. When the first feature is "under", "beneath", or "downward" of the second feature, the first feature can be directly below or obliquely below the second feature, or simply indicate that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0037] To thoroughly understand this application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solutions of this application. The preferred embodiments of this application are described in detail below. However, in addition to these detailed descriptions, this application can also have other implementation manners.

[0038] To address the technical problems in the related art, an output structure of a power tool is provided in an embodiment of this application. The output structure of the power tool is provided on Figure 1 and Figure 2 the power tool shown. The power tool in the embodiment of this application can be an electric wrench, and the following mainly takes the electric wrench as an example for introduction. It can be understood that the technical solutions in the embodiments of this application can also be applied to other power tools.

[0039] Referring to Figures 3 - 5 , the output structure of the power tool includes:

[0040] A tool chuck 10, having a polygonal outer prism 11 for installing a sleeve and a polygonal inner hole 12 for installing a screwdriver bit 50;

[0041] A housing 20, having a chamber with an open front end, and a bearing 21 for rotatably supporting the tool chuck 10 is installed at the opening of the chamber; the tool chuck 10 includes a support section 13 inserted into the inner hole of the bearing 21, and the support section 13 is located behind the polygonal outer prism 11 on the outer periphery of the tool chuck 10;

[0042] A sealing ring 30 is sleeved on the outer periphery of the support section 13, and an annular groove 14 for positioning the sealing ring 30 is formed in the outer periphery of the support section 13; the outer periphery of the sealing ring 30 abuts against the inner hole wall of the bearing 21;

[0043] A locking member 40 is configured to lock the screwdriver bit 50 by radially abutting against the outer periphery of the screwdriver bit 50. At least two locking members 40 are provided and are evenly distributed in the circumferential direction of the support section 13; a locking hole 15 extending radially and communicating with the polygonal inner hole 12 is formed in the bottom wall of the annular groove 14 for the locking member 40 to move radially; the sealing ring 30 has elasticity. When the screwdriver bit 50 is inserted into the polygonal inner hole 12, the sealing ring 30 presses the locking member 40 towards the screwdriver bit 50 to lock the screwdriver bit 50.

[0044] Understandably, the tool chuck 10 is configured to fix or hold a working accessory at the load end of a power tool. The working accessory can be a socket, a screwdriver bit 50, etc. In other power tools, it can also be a drill bit.

[0045] The socket can be an abbreviation for a socket wrench head or a socket head, and refers to a working accessory that cooperates with an external hexagon bolt, etc.

[0046] In addition to fixing or holding the working accessory, the tool chuck 10 also needs to drive the working accessory to move, such as rotate. Therefore, a bearing 21 that rotatably supports the tool chuck 10 is installed at the opening of the chamber to facilitate the smooth rotation of the tool chuck 10. In addition, the cooperation between the tool chuck 10 and the bearing 21 can not only facilitate the rotation of the tool chuck 10, but also play an axial sealing role for the inner hole of the bearing 21. The sealing ring 30 further enhances the sealing effect.

[0047] Furthermore, the sealing ring 30 also functions as a reset member in addition to sealing. It can be understood that the sealing ring 30 having good elasticity is also a sufficient condition for sealing. The sealing ring 30 in this embodiment has good elasticity. Therefore, when the locking member 40 is extruded and moves outward, it will squeeze the sealing ring 30, causing the sealing ring 30 to deform and store energy. After the extrusion force on the locking member 40 decreases, the elastic force of the sealing ring 30 can reset the locking member 40. Therefore, the setting of the sealing ring 30 is very ingenious and is also a creative design.

[0048] It can be understood that a concave pit is provided on the outer circle of the screwdriver head 50. In this way, when the screwdriver head 50 is inserted into the polygonal inner hole 12, the screwdriver head 50 exerts an extrusion effect on the locking member 40, and the locking member 40 moves radially outward. When the screwdriver head 50 is inserted into the polygonal inner hole 12 by a preset length and the concave pit is aligned with the locking member 40, the extrusion force on the locking member 40 is reduced, and the locking member 40 is reset under the action of elastic force, that is, it moves radially inward and is stuck in the concave pit, thereby fixing the axial position of the screwdriver head 50.

[0049] Specifically, the inwardly facing portion of the locking member 40 may be configured to be in a shape that matches the recess. For example, if the recess is an arc-shaped recess, the inwardly facing portion of the locking member 40 may also be in an arc shape.

[0050] Without limitation, when the screwdriver head 50 is inserted into the polygonal inner hole 12, the tail of the screwdriver head 50 and / or the inward portion of the locking member 40 is configured to be conical or arc-shaped, which can generate an axial force component and a radial force component to drive the locking member 40 to move axially inward and radially outward, respectively. However, since the locking member 40 can only move radially, the radial force component plays a role in causing the locking member 40 to move radially.

[0051] The output structure of the electric tool of the embodiment of the present application is provided with a polygonal outer prism 11 for mounting a sleeve and a polygonal inner hole 12 for mounting a screwdriver head 50, and a locking member 40 for locking the screwdriver head 50 by radially abutting against the outer periphery of the screwdriver head 50, and a sealing ring 30 for clamping the outer end of the locking member 40, that is, the elastic force of the sealing ring 30 is used to provide the locking member 40 with power to lock the position of the screwdriver head 50; in this way, the sealing ring 30 can not only play a sealing role, but also provide locking power, without the need to provide other power, and the axial length of the tool chuck 10 is also shortened.

[0052] In some other embodiments of the present application, the polygonal outer prism 11 is a quadrangular prism, and the polygonal inner hole 12 is an inner hexagonal hole.

[0053] The tetrahedral prism is an outer prism with a rectangular cross-section, and the hexagonal hole is a hole with a regular hexagonal cross-section. The rectangular and regular hexagonal hole-shaft combination can transmit torque well, and the processing cost is also low.

[0054] In other embodiments of the present application, the support section 13 is interference fit with the inner hole of the bearing 21 .

[0055] In this way, the tool chuck 10 can be installed more stably and have a better sealing effect.

[0056] In other embodiments of the present application, the bearing 21 is an oil-containing bearing 21 .

[0057] Understandably, the oil-impregnated bearing 21 is a sliding bearing 21, which has a simpler structure and lower cost compared to a rolling bearing 21. The oil-impregnated bearing 21, that is, a porous bearing 21 (Porous Bearing), is a sintered body mainly made of metal powder. Utilizing the porosity of the sintered body, it is impregnated with 10% to 40% (volume fraction) of lubricating oil. It has the characteristics of low cost, vibration absorption, low noise, and no need to add lubricating oil during a long working time, and is particularly suitable for working environments where lubrication is difficult or oil contamination is not allowed.

[0058] In some other embodiments of the present application, a first snap ring 22 is provided on the outer wall of the oil-impregnated bearing 21, and a first snap ring groove 23 for accommodating the first snap ring 22 is provided on the inner wall of the opening. Through the cooperation of the first snap ring 22 and the first snap ring groove 23, the axial positioning of the oil-impregnated bearing 21 is achieved.

[0059] In this way, processing, installation, and disassembly are all relatively fast.

[0060] In some other embodiments of the present application, the sealing ring 30 is an O-ring.

[0061] An O-ring is a rubber sealing ring 30 with a circular cross-section. The O-ring is simple to manufacture, reliable in function, and has simple installation requirements, and is widely used in the sealing of various mechanical equipment. The O-ring can be used not only in static applications but also in dynamic applications where there is relative movement between components. The materials of the O-ring include nitrile rubber, fluororubber, etc.

[0062] In some other embodiments of the present application, the locking member 40 is a ball head pin, and the number is 2 pieces, which are symmetrically arranged on both sides of the polygonal inner hole 12; the screwdriver bit 50 is inserted into the polygonal inner hole 12, and the ball head pin is radially outwardly moved under the extrusion of the screwdriver bit 50 and squeezes the sealing ring 30 to cause local deformation thereof. The ball head pin moves outward in the radial direction to allow the screwdriver bit 50 to be inserted into the polygonal inner hole 12; the locking hole 15 communicates with the polygonal inner hole 12, and the ball head pin is pressed into the polygonal inner hole 12 by the elastic force of the sealing ring 30 to lock the screwdriver bit 50; when the screwdriver bit 50 is removed from the polygonal inner hole 12, the ball head pin will be radially outwardly moved under the extrusion of the screwdriver bit 50 and squeeze the sealing ring 30 to cause local deformation thereof. The ball head pin moves outward in the radial direction to allow the screwdriver bit 50 to be removed from the polygonal inner hole 12.

[0063] The ball head pin can be a standard part, and as the locking member 40, it has the characteristics of reliable quality and low cost. The head of the ball head pin is spherical, which is beneficial to receiving the extrusion of the screwdriver bit 50 and generating sufficient radial component force.

[0064] In some other embodiments of the present application, in the axial direction of the polygonal inner hole 12, the distance between the locking hole 15 and the bottom wall of the polygonal inner hole 12 is set according to the tail size of the screwdriver bit 50, so that when the locking member 40 locks the screwdriver bit 50, the bottom wall of the polygonal inner hole 12 supports the tail of the screwdriver bit 50.

[0065] That is, the distance between the pit of the screwdriver bit 50 and the tail of the screwdriver bit 50 is adapted to the distance between the locking hole 15 and the bottom wall of the polygonal inner hole 12.

[0066] In this way, when the locking member 40 locks the screwdriver bit 50, the tail of the screwdriver bit 50 abuts against the bottom wall of the polygonal inner hole 12. The axial position of the screwdriver bit 50 is relatively stable. During work, for example, when screwing a screw, the axial movement of the screwdriver bit 50 is reduced, and the extrusion force of the locking member 40 on the sealing ring 30 is reduced, which is beneficial to the sealing effect of the sealing ring 30.

[0067] In some other embodiments of the present application, a second snap ring 16 for positioning the axial position of the sleeve is provided at the front end of the tool chuck 10, and the outer diameter size of the second snap ring 16 is adapted to the second snap ring groove of the sleeve.

[0068] In this way, it is beneficial to quickly position the axial position of the sleeve wrench head, and the structure is simple.

[0069] In some other embodiments of the present application, the electric tool output structure further includes:

[0070] A shock-absorbing washer 60, located at the connection between the housing 20 and the gearbox 80, to reduce the mutual transmission of load and motor vibration.

[0071] The embodiments of the present application further provide an electric tool. Refer to Figure 1 and Figure 2 , the electric tool includes:

[0072] A motor 70;

[0073] A gearbox 80, the input end of which is connected to the rotating shaft of the motor 70, and the output end extends towards the load end;

[0074] The electric tool output structure described above, the rear end of the tool chuck 10 is connected to the output end of the gearbox 80.

[0075] That is, the motor 70 is decelerated by the gearbox 80, and after deceleration, it drives the tool chuck 10 to rotate.

[0076] Specifically, the gearbox 80 can be located inside the housing 20. The output end of the gearbox 80 can be the end facing the load, that is, the end for installing the sleeve or the screwdriver bit 50.

[0077] The output end of the gear box 80 can be connected to the tool chuck 10 through a quadrangular prism or a hexagonal prism to transmit torque, or can be transmitted through the cooperation of a key and a keyway, without limitation.

[0078] The electric tool of the embodiment of the present application is provided with a polygonal outer prism 11 for mounting a sleeve and a polygonal inner hole 12 for mounting a screwdriver head 50, and a locking member 40 for locking the screwdriver head 50 by radially abutting against the outer periphery of the screwdriver head 50, and a sealing ring 30 for clamping the outer end of the locking member 40, that is, the elastic force of the sealing ring 30 is used to provide the locking member 40 with power to lock the position of the screwdriver head 50; in this way, the sealing ring 30 can not only play a sealing role, but also provide locking power, without the need to provide other power, and the axial length of the tool chuck 10 is also shortened.

[0079] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope disclosed in the present application. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present application and do not limit the scope of protection of the patent of this application.

Claims

1. An electric tool output structure, characterized in that: include: A tool chuck (10) having a polygonal outer prism (11) for mounting a sleeve and a polygonal inner hole (12) for mounting a screwdriver head (50); The housing (20) has a chamber with a front end opening, and a bearing (21) for rotatably supporting the tool chuck (10) is installed at the opening of the chamber; the tool chuck (10) includes a support section (13) inserted into the inner hole of the bearing (21), and the support section (13) is located behind the polygonal outer prism (11) on the outer periphery of the tool chuck (10); A sealing ring (30) is sleeved on the outer circumference of the support section (13); an annular groove (14) for positioning the sealing ring (30) is provided on the outer circumference of the support section (13); the outer circumference of the sealing ring (30) abuts against the inner hole wall of the bearing (21); The locking member (40) is configured to lock the screwdriver head (50) by radially abutting against the outer circumference of the screwdriver head (50), and at least two locking members (40) are provided, which are evenly distributed in the circumferential direction of the support section (13); the bottom wall of the annular groove (14) is provided with a locking hole (15) extending radially and connected to the polygonal inner hole (12) so as to allow the locking member (40) to move radially; the sealing ring (30) is elastic, and when the screwdriver head is inserted into the polygonal inner hole (12), the sealing ring presses the locking member toward the screwdriver head to lock the screwdriver head.

2. The electric tool output structure according to claim 1, characterized in that: The polygonal outer prism (11) is a quadrangular prism, and the polygonal inner hole (12) is a hexagonal hole.

3. The power tool output structure according to claim 1, characterized in that: The support section (13) is interference fit with the inner hole of the bearing (21).

4. The power tool output structure according to claim 1, characterized in that: The bearing (21) is an oil-containing bearing (21).

5. The electric tool output structure according to claim 4, characterized in that: The outer wall of the oil-containing bearing (21) is provided with a first retaining spring (22), and the inner wall of the opening is provided with a first retaining spring groove (23) for accommodating the first retaining spring (22). The axial positioning of the oil-containing bearing (21) is achieved through the cooperation between the first retaining spring (22) and the first retaining spring groove (23).

6. The electric tool output structure according to claim 1, characterized in that: The sealing ring (30) is an O-ring.

7. The power tool output structure according to claim 1, characterized in that: The locking member (40) is a ball pin, two of which are symmetrically arranged on both sides of the polygonal inner hole (12); the screwdriver head (50) is inserted into the polygonal inner hole (12), and the ball pin is squeezed by the screwdriver head (50) to move radially outward, and squeezes the sealing ring (30) to partially deform it, and the radial position of the ball pin changes outward to allow the screwdriver head (50) to be inserted into the polygonal inner hole (12); the locking hole (15) is symmetrical with the polygonal inner hole (12); The two holes (12) are connected, and the ball pin is pressed into the polygonal inner hole (12) by the elastic force of the sealing ring (30) to lock the screwdriver head (50); when the screwdriver head (50) is removed from the polygonal inner hole (12), the ball pin is squeezed by the screwdriver head (50) to move radially outward, and squeezes the sealing ring (30) to cause it to partially deform, and the radial position of the ball pin changes outward to allow the screwdriver head (50) to be removed from the polygonal inner hole (12).

8. The power tool output structure according to claim 1, characterized in that: In the axial direction of the polygonal inner hole (12), the distance between the locking hole (15) and the bottom wall of the polygonal inner hole (12) is set according to the size of the tail of the screwdriver head (50), so that when the locking member (40) locks the screwdriver head (50), the bottom wall of the polygonal inner hole (12) supports the tail of the screwdriver head (50).

9. The power tool output structure according to any one of claims 1 to 8, characterized in that: A second retaining spring (16) for locating the axial position of the sleeve is arranged at the front end of the tool chuck (10); the outer diameter of the second retaining spring (16) is adapted to fit the second retaining spring (16) groove of the sleeve.

10. An electric tool, characterized in that: include: Motor (70); A gear box (80), the input end of which is connected to the rotating shaft of the motor (70), and the output end of which extends toward the load end; According to any one of claims 1 to 9, the rear end of the tool chuck (10) is connected to the output end of the gear box (80).

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