CN114189099A

CN114189099A - Two-way shaft extension structure of slender spindle motor

Info

Publication number: CN114189099A
Application number: CN202111544554.4A
Authority: CN
Inventors: 陈妙梅; 李伟
Original assignee: Deqing Tongda Motor Co ltd
Current assignee: Deqing Tongda Motor Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-03-15

Abstract

The invention relates to a bidirectional shaft extension structure of a slender spindle motor, which comprises a rotor core and a spindle, wherein the rotor core is provided with an assembling through hole corresponding to the spindle, the spindle penetrates through the front end and the rear end of the rotor core through the assembling through hole and is mutually connected and fixed, the rear end of the spindle is provided with a main joint for connecting a machining tool, the front end of the spindle is connected with an auxiliary shaft, the rear end of the auxiliary shaft is provided with a connecting cavity corresponding to the spindle, the front end of the auxiliary shaft is provided with an auxiliary joint for connecting the machining tool, the front end of the spindle is inserted into the connecting cavity and is mutually connected and fixed through interference fit, and the front end and the rear end of the rotor core can be connected with the machining tool by connecting the auxiliary shaft on the spindle, so that equipment can adapt to more different use occasions and the production efficiency is improved.

Description

Two-way shaft extension structure of slender spindle motor

Technical Field

The invention relates to the technical field of motor equipment technology, in particular to a bidirectional shaft extension structure of a slender spindle motor.

Background

Along with the development of economy, spindle motors are more and more popular in various machining industries, the spindle motors on the market are generally unidirectional shaft extension at present, the combined machining of the spindle motors by the manufacturing industry is increasingly strong, and the spindle motors are required to be provided with a double-shaft extension structure, so that a cutter can be conveniently clamped at two shaft extension ends. The existing spindle motor is long and thin in design characteristics due to the fact that high-speed operation is needed, a motor iron core needs to select a small-size lengthened rotor, and due to the limitation of the size of the inner diameter of the rotor, the diameter of a rotor shaft at one end needs to be in accordance with the size of an inner hole of the rotor, and a double-shaft extension structure cannot be made. And the processing precision is difficult to guarantee by adopting the bidirectional shaft extension which is welded and assembled at the non-shaft-extension end. Therefore, the general slender spindle motor is a unidirectional shaft extension. The cutter clamping can be only realized on a single side, and the motor needs to be replaced for secondary positioning and processing on occasions requiring two combined processing, so that the production efficiency is lower.

Therefore, further improvements are needed.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned shortcomings of the prior art, and provides a bi-directional shaft extension structure of a slim spindle motor, which is intended to solve at least one of the above-mentioned technical problems in the prior art to some extent.

The purpose of the invention is realized as follows:

the utility model provides a two-way axle of slim and long type spindle motor stretches structure, including rotor core and main shaft, rotor core has the assembly through-hole that corresponds with the main shaft, the main shaft link up rotor core's front and back both ends and interconnect through the assembly through-hole and fix, the rear end of main shaft has the owner that is used for connecting the machining tool and connects, the front end of main shaft is connected with the countershaft, the rear end of countershaft has the chamber of being connected that corresponds with the main shaft, the front end of countershaft has the vice joint that is used for connecting the machining tool, the front end of main shaft inserts and connects the chamber and fix through interference fit interconnect.

And the auxiliary shaft is provided with an exhaust hole corresponding to the connecting cavity.

The auxiliary shaft is provided with exhaust holes which are symmetrically arranged, the main shaft is provided with pin holes corresponding to the exhaust holes, when the main shaft is fixedly connected with the auxiliary shaft, the axes of the exhaust holes and the pin holes are superposed and form a pin channel, and the pin channel is connected with a fixed pin.

The main shaft and the auxiliary shaft are respectively processed and molded by materials with consistent expansion coefficients.

The shaft diameters of the main joint and the auxiliary joint are equivalent to each other and are larger than the shaft diameter of the front end of the main shaft.

And the main joint and the auxiliary joint are respectively provided with thread structures in opposite directions.

And when the main shaft penetrates through the front end and the rear end of the rotor core through the assembling through hole and is fixedly connected with each other, the limiting step is abutted against the outer side position of the assembling through hole.

The processing tool is a cutter or a grinding wheel head or a saw blade, and the main joint and the auxiliary joint can be respectively connected with the same or different processing tools.

The invention has the beneficial effects that:

the auxiliary shaft is connected to the main shaft, so that the front end and the rear end of the rotor core can be connected with processing tools, the equipment can adapt to more different use occasions, and the production efficiency is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a first embodiment of the present invention.

Fig. 3 is an exploded view of the first embodiment of the present invention.

Fig. 4 is an exploded view of the second embodiment of the present invention.

Fig. 5 is an exploded view illustrating a third embodiment of the present invention.

Fig. 6 is a schematic structural view of the first embodiment of the present invention after being assembled with a motor.

Detailed Description

The invention is further described with reference to the following figures and examples.

First embodiment

Referring to fig. 1 to 6, the bidirectional shaft extension structure of the slim spindle motor includes a rotor core 1 and a spindle 2, the rotor core 1 has an assembly through hole 11 corresponding to the spindle 2, the spindle 2 penetrates through the front and rear ends of the rotor core 1 through the assembly through hole 11 and is fixedly connected to each other, the rear end of the spindle 2 has a main joint 21 for connecting a machining tool, the front end of the spindle 2 is connected to a secondary shaft 3, the rear end of the secondary shaft 3 has a connection cavity 32 corresponding to the spindle 2, the front end of the secondary shaft 3 has a secondary joint 31 for connecting a machining tool, the front end of the spindle 2 is inserted into the connection cavity 32 and is fixedly connected to each other through interference fit, and the secondary shaft 3 is connected to the spindle 2, so that the front and rear ends of the rotor core 1 can be connected to the machining tool, the device can adapt to more different use occasions, and the production efficiency is improved.

The invention solves the difficulty of the long and thin type spindle motor in the design of bidirectional shaft extension, meets the requirement of the market on the combination processing of the spindle motor, can work at two ends simultaneously, can be used by one machine, improves the processing efficiency and the processing precision, and also reduces the cost of purchasing a plurality of devices by a user.

The auxiliary shaft 3 can be directly used by being connected with the main shaft 2, subsequent processing is not needed, the integral assembly structure is simplified, and compared with the structure that the existing general main shaft motor only has a single joint, the invention improves the adaptability and the production efficiency of the equipment.

Furthermore, the auxiliary shaft 3 is provided with an exhaust hole 33 at a position corresponding to the connection cavity 32, and the exhaust hole 33 can exhaust gas in the connection cavity 32 in the butt joint process of the main shaft 2 and the auxiliary shaft 3, so that the installation difficulty is reduced.

Furthermore, the auxiliary shaft 3 is provided with exhaust holes 33 which are symmetrically arranged, the main shaft 2 is provided with pin holes 22 corresponding to the exhaust holes 33, when the main shaft 2 is fixedly connected with the auxiliary shaft 3, the axes of the exhaust holes 33 and the pin holes 22 are superposed to form a pin channel, the pin channel is connected with a fixed pin 4, the exhaust holes 33 can reduce the installation difficulty, and the connection strength of the main shaft 2 and the auxiliary shaft 3 can be further improved by matching with the pin holes 22 and the fixed pin 4.

Furthermore, the main shaft 2 and the auxiliary shaft 3 are respectively processed and molded by materials with consistent expansion coefficients, so that the main shaft 2 and the auxiliary shaft 3 are prevented from deforming due to cold and heat changes in subsequent use.

Further, the shaft diameters of the main joint 21 and the auxiliary joint 31 are equivalent and larger than the shaft diameter of the front end of the main shaft 2, so that the bearing capacity of the main joint 21 and the auxiliary joint 31 is increased.

Further, the main joint 21 and the auxiliary joint 31 are respectively provided with a thread structure (not marked in the figures) in opposite directions, and the thread structures can be used for connecting and fixing nuts, so that the processing tool is prevented from being accidentally disengaged, and the overall safety of the equipment is improved.

Furthermore, the main shaft 2 is provided with a limiting step 23, and when the main shaft 2 penetrates through the front end and the rear end of the rotor core 1 through the assembling through hole 11 and is fixedly connected with each other, the limiting step 23 abuts against the outer side position of the assembling through hole 11, so that the mounting accuracy of the main shaft 2 and the rotor core 1 is improved.

Second embodiment

The present embodiment is different from the first embodiment in that: the processing tool of the bidirectional shaft extension structure of the slender spindle motor is a saw blade or a grinding wheel grinding head, the main joint 21 is connected with the saw blade, and the auxiliary joint 31 is connected with the grinding wheel grinding head.

As an equivalent synchronous transformation, the main joint 21 can be connected with a grinding wheel head, and the auxiliary joint 31 can be connected with a saw blade.

The remaining portions not described are the same as those of the first embodiment, and are not repeated here.

Third embodiment

The present embodiment is different from the first embodiment in that: the processing tools of the two-way shaft extension structure of the slender spindle motor are all saw blades, and the main joint 21 and the auxiliary joint 31 are respectively connected with the corresponding saw blades.

Fourth embodiment

The present embodiment is different from the first embodiment in that: the processing cutter of the two-way shaft extension structure of the slender spindle motor is a saw blade or a cutter, the main joint 21 is connected with the saw blade, and the auxiliary joint 31 is connected with the cutter.

As an equivalent synchronous transformation, the main joint 21 can be connected with a cutter, and the auxiliary joint 31 can be connected with a grinding wheel head.

Fifth embodiment

The present embodiment is different from the first embodiment in that: the processing tools of the two-way shaft extension structure of the slender spindle motor are all grinding wheel grinding heads, and the main joint 21 and the auxiliary joint 31 are respectively connected with the corresponding grinding wheel grinding heads.

The above examples are only preferred embodiments of the present invention, and other embodiments of the present invention are possible. Those skilled in the art can make equivalent changes or substitutions without departing from the spirit of the present invention, and such equivalent changes or substitutions are included in the scope set forth in the claims of the present application.

Claims

1. The utility model provides a two-way axle of slim and long type spindle motor stretches structure, includes rotor core (1) and main shaft (2), rotor core (1) has assembly through-hole (11) that correspond with main shaft (2), main shaft (2) link up rotor core (1) through assembly through-hole (11) both ends and interconnect fixed around, and the rear end of main shaft (2) has main joint (21) that are used for connecting machining tool, its characterized in that, the front end of main shaft (2) is connected with countershaft (3), the rear end of countershaft (3) has the chamber of being connected (32) that correspond with main shaft (2), and the front end of countershaft (3) has auxiliary joint (31) that are used for connecting machining tool, and the front end of main shaft (2) inserts and connects chamber (32) and fixes through interference fit interconnect.

2. The bi-directional shaft extension structure of the slim spindle motor according to claim 1, wherein: and the auxiliary shaft (3) is provided with an exhaust hole (33) at a position corresponding to the connecting cavity (32).

3. The bi-directional shaft extension structure of the slim spindle motor according to claim 2, wherein: be equipped with exhaust hole (33) that the symmetry set up on countershaft (3), be equipped with on main shaft (2) with pin hole (22) that exhaust hole (33) correspond, when main shaft (2) are connected fixedly with countershaft (3), the axle center coincide of exhaust hole (33) and pin hole (22) forms the pin passageway, the pin passageway is connected with fixed pin (4).

4. The bi-directional shaft extension structure of the slim spindle motor according to claim 1, wherein: the main shaft (2) and the auxiliary shaft (3) are respectively processed and molded by materials with consistent expansion coefficients.

5. The bi-directional shaft extension structure of the slim spindle motor according to claim 1, wherein: the main joint (21) and the auxiliary joint (31) have the same shaft diameter and are larger than the shaft diameter of the front end of the main shaft (2).

6. The bi-directional shaft extension structure of the slim spindle motor according to claim 1, wherein: and the main joint (21) and the auxiliary joint (31) are respectively provided with thread structures in opposite directions.

7. The bi-directional shaft extension structure of the slim spindle motor according to claim 1, wherein: be equipped with spacing step (23) on main shaft (2), when main shaft (2) link up the front and back both ends of rotor core (1) and interconnect is fixed through assembly through-hole (11), spacing step (23) support and lean on the outside position of assembly through-hole (11).

8. The bi-directional shaft extension structure of the slim spindle motor according to claim 1, wherein: the machining tool is a cutter or a grinding wheel head or a saw blade, and the main joint (21) and the auxiliary joint (31) can be respectively connected with the same or different machining tools.