A hollow motor shaft

Abstract

This utility model discloses a hollow motor shaft, relating to the technical field of motor shafts. It includes a shaft body with several annularly arranged positioning grooves on the outer circumferential wall of the connecting end; a grinding head with a slot at its connecting end, into which the connecting end of the shaft body extends; and a first or second connecting assembly for fixing the grinding head to the shaft body. This utility model has advantages such as ease of use, convenient grinding head replacement, and reduced grinding head production costs.

Description

Technical Field

[0001] This utility model relates to the technical field of motor shafts, and in particular to a hollow motor shaft. Background Technology

[0002] Hollow cup motors, due to their small size, can be used in various handheld devices, such as nail polishing machines. During use, nail polishing machines can achieve different polishing effects by changing different polishing heads. Existing polishing heads are equipped with an iron shaft, which is connected to the shaft of the hollow cup motor. However, after a period of use, the polishing head will wear out and need to be replaced, making it a consumable. Polishing heads with iron shafts are not only expensive to produce but also involve more production steps. Therefore, this application proposes a structure in which the shaft of the hollow cup motor is directly connected to the polishing head. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a hollow motor shaft to solve the problem of high mold replacement cost of the prior art nail polishing machine described in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hollow motor shaft, comprising... The rotating shaft body has several positioning grooves arranged in a ring on the outer circumferential wall of the connecting end; The grinding head has a slot at the connecting end, into which the connecting end of the rotating shaft body extends; The first connecting component or the second connecting component is used to fix the grinding head to the rotating shaft body; The first connection component includes Several inlet and outlet slots are respectively provided at the connecting end of the rotating shaft body. One end of the inlet and outlet slot is connected to the positioning slot and the other end extends to the side of the rotating shaft body. Several connecting plates are respectively set at the bottom of the slot, and each slot corresponds to two connecting plates; Several limiting plates are respectively set on several connecting plates. The two limiting plates corresponding to the inlet and outlet slots form a deformation gap. The two limiting plates are used to pass through the inlet and outlet slots and extend into the positioning slot to restrict the movement of the grinding head relative to the rotating shaft body. The second connection component includes Several through holes are respectively set on the side wall of the slot at the position corresponding to the positioning slot; Several positioning pins, one end of which passes through a through hole and extends into a positioning groove; A limiting sleeve is fitted onto the outer wall of the grinding head to prevent the positioning pin from moving out of the positioning groove.

[0005] Preferably, the inner circumferential wall of the limiting sleeve has an internal thread, the outer wall of the grinding head has an external thread, and the internal thread on the limiting sleeve is connected to the external thread of the grinding head.

[0006] Preferably, the outer circumferential wall of the grinding head has a protrusion, and the inner wall of the limiting sleeve has a strip-shaped limiting groove, into which the protrusion is engaged.

[0007] Preferably, the inner circumferential wall of the limiting sleeve has a flared groove at the end away from the internal thread, and the flared groove extends to the position of the limiting groove.

[0008] The beneficial effects of adopting the above technical solutions are: This application enables the grinding head to be detachably fixed to the end of the rotating shaft body by setting a first connecting component or a second connecting component. This allows the grinding head to be directly connected to the rotating shaft body during the grinding head replacement process, reducing the cost of manufacturing the grinding head. In this application, the first connecting component, through the deformation of the elastic limiting plate and the connecting plate, allows the limiting plate to pass through the inlet / outlet groove and enter the positioning groove, and then return to its original state, making it difficult for the limiting plate to move out of the positioning groove. In this application, the second connecting component, through the limiting sleeve connected to the grinding head, can restrict the positioning pin in the positioning groove, thus fixing the grinding head and the rotating shaft body relatively. Attached Figure Description

[0009] Figure 1 This is a front view of the rotating shaft with inlet and outlet slots of this utility model.

[0010] Figure 2 This is the front view of the limiting plate of this utility model entering the positioning groove.

[0011] Figure 3 This is a side view of the grinding head of this utility model with the first connecting component.

[0012] Figure 4 This is a cross-sectional view of the mold of this utility model with a first connecting component.

[0013] Figure 5 This is a schematic diagram of the rotating shaft with inlet and outlet slots of this utility model.

[0014] Figure 6 This is a front view of the present invention with a second connecting component.

[0015] Figure 7 This is a front view of the grinding head with the second connecting component of this utility model. Figure 8 This is a cross-sectional view of a portion of the grinding head with a second connecting assembly according to this utility model.

[0016] Figure 9 This is a cross-sectional view of the limiting sleeve of this utility model.

[0017] The components include: shaft body 10, positioning groove 20, inlet / outlet groove 21, grinding head 30, slot 31, limiting plate 40, deformation gap 41, connecting plate 42, positioning post 50, through hole 51, limiting sleeve 60, internal thread 61, flared groove 62, limiting groove 63, protrusion 64, and external thread 65. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-9 In this first embodiment, a hollow motor shaft includes... The rotating shaft body 10 has several positioning grooves 20 arranged in a ring on the outer circumferential wall of the connecting end; The grinding head 30 has a slot 31 at its connecting end, into which the connecting end of the rotating shaft body 10 extends; A first connecting component or a second connecting component is used to fix the grinding head 30 to the rotating shaft body 10; The first connection component includes Several inlet and outlet slots 21 are respectively provided at the connecting end of the rotating shaft body 10. One end of the inlet and outlet slot 21 is connected to the positioning slot 20, and the other end extends to the side of the rotating shaft body 10. Several connecting plates 42 are respectively set at one end of the bottom of the slot 31, and each slot 21 corresponds to two connecting plates 42; Several limiting plates 40 are respectively set on several connecting plates 42. Two limiting plates 40 corresponding to the inlet and outlet groove 21 form a deformation gap 41. The two limiting plates 40 are used to pass through the inlet and outlet groove 21 and extend into the positioning groove 20 to restrict the movement of the grinding head 30 relative to the rotating shaft body 10. The second connection component includes Several through holes 51 are respectively provided on the side wall of the slot 31 at the positions corresponding to the positioning slots 20; Several positioning pins 50, one end of which passes through the through hole 51 and extends into the positioning groove 20; A limiting sleeve 60 is fitted onto the outer wall of the grinding head 30 to restrict the positioning pin 50 from moving out of the positioning groove 20.

[0020] This embodiment is implemented as follows: When the first connecting component is used in this application, the connecting end of the rotating shaft body 10 is inserted into the slot 31 of the grinding head 30. The connecting plate 42 and the limiting plate 40 in this application have a certain elasticity. When the ends of the two limiting plates 40 are inserted into the inlet and outlet groove 21, the limiting plate 40 will be deformed by the squeezing force, and the connecting plate 42 will also be deformed. After the limiting plate 40 passes through the inlet and outlet groove 21 and enters the positioning groove 20, the connecting plate 42 and the limiting plate 40 will return to their original state. This allows the limiting plate 40 to restrict the movement of the connecting plate 42, and the connecting plate 42 to restrict the movement of the grinding head 30, thereby achieving a fixed connection between the grinding head 30 and the rotating shaft body 10. When disassembly is required, a larger force is used to pull the grinding head 30, causing the limiting plate 40 and the connecting plate 42 to deform again, so that the limiting plate 40 passes through the inlet and outlet groove 21, and the grinding head 30 is removed. When using the second connecting component, the connecting end of the rotating shaft body 10 is inserted into the slot 20, then the positioning pin 50 is inserted into the through hole 51 and extends into the positioning groove 20, and then the limiting sleeve 60 is placed on the outer wall of the grinding head 30 so that the limiting sleeve 60 restricts the positioning pin 50 within the positioning groove 20.

[0021] Please see Figure 6 , 7 8, 9, The inner circumferential wall of the limiting sleeve 60 has an internal thread 61, and the outer wall of the grinding head 30 has an external thread 65. The internal thread 61 on the limiting sleeve 60 is connected to the external thread 65 on the grinding head 30.

[0022] This application achieves the connection between the limiting sleeve 60 and the grinding head 30 by connecting the external thread on the outer wall of the grinding head 30 with the internal thread 61 on the inner wall of the limiting sleeve 60.

[0023] Please see Figure 6 , 7 8, 9, The outer circumferential wall of the grinding head 30 has a protrusion 64, and the inner wall of the limiting sleeve 60 has a strip-shaped limiting groove 63, and the protrusion 64 is inserted into the limiting groove 63.

[0024] To prevent the limiting sleeve 60 from moving on the grinding head 30 due to vibration, this application provides a protrusion 64 on the grinding head 30 and a strip-shaped limiting groove 63 on the inner wall of the limiting sleeve 60, so that the limiting sleeve 60 can engage the protrusion 64 into the limiting groove 63 during rotation. The limiting sleeve 60 in this application is made of elastic plastic material and has a certain degree of elasticity.

[0025] Please see Figure 6 , 7 8, 9, The inner circumferential wall of the limiting sleeve 60 has a flared groove 62 at the end away from the internal thread 61, and the flared groove 62 extends to the position of the limiting groove 63.

[0026] The flared groove 62 provided in this application makes it easier for the limiting sleeve 60 to cover the protrusion 64.

[0027] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A hollow motor shaft, characterized in that, include The rotating shaft body has several positioning grooves arranged in a ring on the outer circumferential wall of the connecting end; The grinding head has a slot at the connecting end, into which the connecting end of the rotating shaft body extends; The first connecting component or the second connecting component is used to fix the grinding head to the rotating shaft body; The first connection component includes Several inlet and outlet slots are respectively provided at the connecting end of the rotating shaft body. One end of the inlet and outlet slot is connected to the positioning slot and the other end extends to the side of the rotating shaft body. Several connecting plates are respectively set at the bottom of the slot, and each slot corresponds to two connecting plates; Several limiting plates are respectively set on several connecting plates. The two limiting plates corresponding to the inlet and outlet slots form a deformation gap. The two limiting plates are used to pass through the inlet and outlet slots and extend into the positioning slot to restrict the movement of the grinding head relative to the rotating shaft body. The second connection component includes Several through holes are respectively set on the side wall of the slot at the position corresponding to the positioning slot; Several positioning pins, one end of which passes through a through hole and extends into a positioning groove; A limiting sleeve is fitted onto the outer wall of the grinding head to prevent the positioning pin from moving out of the positioning groove.

2. A hollow motor shaft according to claim 1, characterized in that, The inner circumferential wall of the limiting sleeve has an internal thread, and the outer wall of the grinding head has an external thread. The internal thread on the limiting sleeve is connected to the external thread of the grinding head.

3. A hollow motor shaft according to claim 2, characterized in that, The grinding head has a protrusion on its outer circumferential wall, and the inner wall of the limiting sleeve has a strip-shaped limiting groove, into which the protrusion is engaged.

4. A hollow motor shaft according to claim 3, characterized in that, The inner circumferential wall of the limiting sleeve has a flared groove at the end away from the internal thread, which extends to the position of the limiting groove.

Images