Motor with integrated shaft

Abstract

The utility model relates to a motor with an integrated shaft. The motor comprises a motor body and a bit main shaft integrally formed with an output shaft of the motor body. A mounting notch is formed in the free end of the bit main shaft in the radial direction, a plurality of movable bits are movably connected to the free end of the bit main shaft, the movable bits and matched screws are different, and the movable bits of corresponding specifications can be selectively inserted or the original bit main shaft can be used during use. The movable bit comprises an end and a connecting end inserted into the bit spindle, the connecting end is inserted into the bit spindle in a matched mode, the end face, close to the bit spindle, of the end is provided with at least one wedging block, one side face of each wedging block is provided with a spring pin, and the end face of the free end of the bit spindle is provided with a positioning opening where the wedging blocks can be inserted. And the wedging block is inserted into the positioning opening to drive the spring pin to be positioned in the mounting notch, so that screws with different specifications can be matched for use, and practicability is improved.

Description

Technical Field

[0001] This application belongs to the technical field of motors, and in particular, relates to a motor with an integrated shaft. Background Art

[0002] A bit, usually refers to the screwdriver bit installed on a hand drill or a hammer drill to screw a screw. The bit is driven by a motor to rotate to achieve the action of screwing a screw.

[0003] In the connection between the existing motor and the bit spindle, the bit spindle is independent and assembled with the output shaft of the motor. After long-term use, the following problems occur:

[0004] 1. After the motor output shaft and the bit spindle are assembled, the overall dimension is very long, and it is difficult to make the space compact; 2. Because of the assembly, the machining accuracy requirements for the bit spindle are high, otherwise there will be a problem of coaxiality deviation with the output shaft of the motor body;

[0005] 3. An additional bearing is required to support the bit spindle.

[0006] Based on this, an improved technology is proposed. Utility Model Content

[0007] The technical problem to be solved by this utility model is: to solve the deficiencies in the prior art that the overall dimension is very long after the motor output shaft and the bit are assembled, the machining accuracy requirements for the bit are high, and an additional bearing is required to support the bit spindle, so as to provide a motor with an integrated shaft.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a motor with an integrated shaft, including a motor body and a bit spindle integrally formed with the output shaft of the motor body. Here, the motor body is mainly a speed reducer, which is more suitable for an electric gun; a mounting notch is radially opened at the free end of the bit spindle, and a movable bit is movably connected to the free end of the bit spindle. There are several movable bits, and the matching screws for each movable bit are different. When in use, the corresponding specification of the movable bit can be selected, or the original integrated bit spindle can be used. The movable bit includes a head end and a connection end inserted into the bit spindle. The connection end is inserted and matched with the inside of the bit spindle. At least one fitting block is provided on the end face of the head end close to the bit spindle, and a spring pin is provided on one side of each fitting block. A positioning port that can be inserted by the fitting block is opened on the end face of the free end of the bit spindle. When the fitting block is inserted into the positioning port, the spring pin is driven to be located in the mounting notch, so that different specification screws can be matched for use, improving the practicability.

[0009] Furthermore, at least two fitting blocks are provided, symmetrically arranged on the bit spindle, and two spring pins and positioning ports are also provided in cooperation.

[0010] Further, the spring pins are arranged on the side surfaces of the fitting blocks in different directions.

[0011] Further, it also includes a bearing and a retaining ring connected to the motor body. A number of expansion protrusions are provided on the output end of the motor body and the bit spindle. The inner ring of the bearing is provided with a connection port allowing the insertion of the expansion protrusions, and the retaining ring is installed outside the bearing on the bit spindle.

[0012] Further, it also includes a number of connection holes radially provided at the front end of the motor body for being connected to the head shell of the electric gun by screws.

[0013] Further, there are four connection holes, which are centrally symmetrically arranged with the central axis line of the motor body as the symmetry point. Radial drilling is more conducive to maintaining the coaxiality accuracy between the output shaft of the motor body and the bit spindle.

[0014] The beneficial effects of the present utility model are as follows:

[0015] By integrating the original bit and the motor, the output shaft of the motor is the bit spindle. The advantages of this design are specifically as follows:

[0016] 1. Greatly compress the axial length of the motor and the bit spindle, which is beneficial to making the product more compact;

[0017] 2. Reduce additional secondary assembly, reduce the deviation generated during assembly, and be beneficial to improving the output accuracy of the motor;

[0018] 3. Greatly reduce costs, reduce the requirements for machining tolerances, and also eliminate the support bearings externally;

[0019] Since the existing bit with an independent design is convenient to replace from the motor, the product of the present utility model is also provided with a plurality of movable bits, and the specifications of each bit are different. In this way, it can be installed at the end of the bit column head in a snap-fit manner, making it more flexible to use. Description of the Drawings

[0020] The technical solutions of the present application will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 is a three-dimensional schematic diagram of a motor structure with an integrated shaft according to an embodiment of the present application;

[0022] Figure 2 is a three-dimensional structural schematic diagram of another perspective of a motor with an integrated shaft according to an embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of a motor with an integrated shaft after installing a movable bit according to an embodiment of the present application;

[0024] Figure 4It is a schematic structural diagram of a motor bit spindle with an integrated shaft according to an embodiment of the present application;

[0025] Figure 5 It is a schematic structural diagram of an existing motor and a bit spindle;

[0026] The reference numerals in the figure are:

[0027] 10. Motor body, 11. Installation notch, 12. Movable bit, 121. End head, 122. Connection end, 123. Fitting block, 124. Spring pin, 13. Connection hole, 20. Bit spindle, 21. Positioning port, 22. Expansion protrusion, 30. Bearing, 31. Connection port, 40. Retaining ring, 50. Motor, 60. Bit. Detailed implementation manners

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation on the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0031] The technical solutions of the present application will be described in detail below with reference to the drawings and in combination with the embodiments. Embodiment

[0032] The present embodiment provides a motor with an integrated shaft, comprising a motor body 10 and a screwdriver spindle 20 integrally formed with the motor body output shaft 10. The motor body 10 here is mainly a reduction motor and is more suitable for electric guns; a mounting recess 11 is radially provided at the free end of the screwdriver spindle 20, and the mounting recess 11 can be used to reinforce it with a clamp when connected to other components. The free end of the screwdriver spindle 20 is movably connected to a movable screwdriver 12, and the outer side surface of the end of the movable screwdriver 12 away from the screwdriver spindle 20 also has an annular recess for facilitating the installation of a retaining spring. A plurality of movable screwdriver bits 12 are provided, each of which can be movably connected to the free end of the screwdriver spindle 20, and each movable screwdriver bit 12 is matched with a different screw. When using, the movable screwdriver bit 12 of the corresponding specification can be selected, or the original screwdriver spindle 20 can be used.

[0033] The movable bit 12 includes an end 121 and a connecting end 122 inserted into the bit spindle 20. The connecting end 122 is matched and plugged into the bit spindle 20. At least one fitting block 123 is provided on the end face of the end 121 close to the bit spindle 20. A spring pin 124 is provided on one side of the fitting block 123. A positioning port 21 capable of being inserted by the fitting block 123 is provided on the free end face of the bit spindle 20. The fitting block 123 is inserted into the positioning port 21 to drive the spring pin 124 to the position. In the mounting recess 11; there are at least two engaging blocks 123, which are symmetrically arranged on the screwdriver bit spindle 20, and two spring pins 124 and positioning holes 21 are also provided; the spring pins 124 are arranged on the side surfaces of the engaging block 123 in different directions, and the spring pins 124 can be squeezed and then inserted into the positioning hole 21 together with the engaging block 123, and then released in the mounting recess 11, and finally the whole is stuck on the screwdriver bit spindle 20, completing the assembly of the movable screwdriver bit 12 and the screwdriver bit spindle 20.

[0034] As an embodiment of the present utility model, in addition to the above structure, it also includes a bearing 30 and a retaining ring 40 connected to the motor body 10, a number of expansion protrusions 22 are provided on the screwdriver spindle 20 and the output end of the motor body 10, and a connection port 31 is provided on the inner ring of the bearing 30 to allow the expansion protrusion 22 to be inserted, and a retaining ring 40 is installed on the screwdriver spindle 20 and outside the bearing 30. The outer retaining ring 40 can prevent the bearing 30 from being separated from the installation position of the motor body 10, thereby enhancing the stability of the connection, and the expansion protrusion 22 is cooperated with the connection port 31 of the bearing 30 to increase the contact surface area, thereby improving the stability of the connection.

[0035] As an embodiment of the present utility model, in addition to the above structure, it further includes a plurality of connection holes 13 radially provided at the front end of the motor body 10 for connecting with the head shell of the electric gun by screws; there are four connection holes 13, which are centrosymmetrically arranged with the axis line of the output shaft of the motor body as the symmetry point. Changing the connection holes 13 from the traditional axial opening to a radial opening is more conducive to maintaining the coaxiality accuracy between the output shaft of the motor body 10 and the bit spindle 20.

[0036] Inspired by the above ideal embodiments based on this application, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A motor with an integrated shaft, characterized in that, It includes a motor body and a bit spindle integrally formed with the output shaft of the motor body; a mounting notch is radially formed at the free end of the bit spindle, and a movable bit is movably connected to the free end of the bit spindle. There are several movable bits, and each movable bit includes a head end and a connecting end inserted into the bit spindle. The connecting end is inserted into the bit spindle in a matching manner. At least one fitting block is provided on the end face of the head end close to the bit spindle, and a spring pin is provided on one side surface of each fitting block. A positioning port that can be inserted by the fitting block is formed on the end face of the free end of the bit spindle. When the fitting block is inserted into the positioning port, the spring pin is located in the mounting notch.

2. The motor with an integrated shaft according to claim 1, characterized in that, At least two fitting blocks are provided, symmetrically arranged on the bit spindle, and two spring pins and positioning ports are also provided in cooperation.

3. The motor with an integrated shaft according to claim 2, characterized in that, The spring pins are arranged on the side surfaces of the fitting blocks in different directions.

4. The motor with an integrated shaft according to claim 3, characterized in that, It further includes a bearing and a retaining ring connected to the motor body. A number of expansion protrusions are formed on the output end of the bit spindle and the motor body. A connecting port allowing the expansion protrusions to be inserted is formed in the inner ring of the bearing. The retaining ring is installed outside the bearing on the bit spindle.

5. A motor having an integrated shaft according to claim 1, characterized in that, It further includes a number of connecting holes radially provided at the front end of the motor body for connecting with the head shell of the electric gun by screws.

6. The motor with an integrated shaft according to claim 5, characterized in that, Four connecting holes are provided, and they are centrosymmetrically arranged with the central axis of the motor body as the symmetry point.

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