阅读说明：本技术 方便拆装的轴芯组件及电主轴 (Shaft core assembly convenient to disassemble and assemble and electric spindle ) 是由 李婉 郭霜 王旭 彭石华 刘昱 李瑞炫 于 2020-12-08 设计创作，主要内容包括：本发明提供一种方便拆装的轴芯组件及电主轴。轴芯组件应用于电主轴,所述轴芯组件包括第一轴芯段、第二轴芯段和相互啮合的两个连接件,一个所述连接件套设于所述第一轴芯段上,另一所述连接件套设于所述第二轴芯段上。本发明提供的方便拆装的轴芯组件及电主轴,将轴芯分为通过连接件连接的第一轴芯段和第二轴芯段,从而方便从两端分别进行装配,提高零件的互换性,改变电主轴零件的装配顺序,降低拆装难度,并利用圆台形结构与连接件的锥形孔配合实现自动锁紧,而且在连接件上设置调节机构,使连接件根据轴承压紧量在轴芯轴向位置任意调整,提高了轴承固定位的位置精准,减少固定隔环配磨工序。(The invention provides a shaft core assembly convenient to disassemble and assemble and an electric spindle. The shaft core assembly is applied to the electric spindle and comprises a first shaft core section, a second shaft core section and two mutually meshed connecting pieces, wherein one connecting piece is sleeved on the first shaft core section, and the other connecting piece is sleeved on the second shaft core section. The shaft core assembly and the electric spindle convenient to disassemble and assemble provided by the invention have the advantages that the shaft core is divided into the first shaft core section and the second shaft core section which are connected through the connecting piece, so that the assembly is convenient to respectively assemble from two ends, the interchangeability of parts is improved, the assembly sequence of parts of the electric spindle is changed, the disassembling and assembling difficulty is reduced, the automatic locking is realized by utilizing the matching of the truncated cone-shaped structure and the tapered hole of the connecting piece, the adjusting mechanism is arranged on the connecting piece, the connecting piece can be randomly adjusted in the axial position of the shaft core according to the bearing compression amount, the position accuracy of the bearing fixing position is improved, and the fixed spacer ring matched grinding process is.)

1. A shaft core assembly, its characterized in that: the shaft core assembly is applied to an electric main shaft and comprises a first shaft core section (1), a second shaft core section (2) and two mutually meshed connecting pieces (3), wherein one connecting piece (3) is sleeved on the first shaft core section (1), and the other connecting piece (3) is sleeved on the second shaft core section (2).

2. The spindle assembly of claim 1, wherein: the end face of the connecting piece (3) is provided with at least two connecting teeth (31), the adjacent two connecting teeth (31) form tooth grooves (32), one connecting tooth (31) on the connecting piece (3) is matched with the other connecting tooth groove (32) on the connecting piece (3).

3. The spindle assembly of claim 2, wherein: the connecting teeth (31) are fan-shaped.

4. The spindle assembly of claim 1, wherein: the second end of the first shaft core section (1) and the first end of the second shaft core section (2) both form a circular truncated cone-shaped structure, and a conical hole matched with the circular truncated cone-shaped structure is formed in the connecting piece (3).

5. The spindle assembly of claim 1, wherein: the connecting piece (3) is provided with an adjusting mechanism, and the inner diameter of the connecting piece (3) can be adjusted by the adjusting mechanism.

6. The spindle assembly of claim 5, wherein: the connecting piece (3) is provided with a break opening (33), the break opening (33) forms the adjusting mechanism, and the inner diameter of the connecting piece (3) is adjusted by adjusting the size of the break opening (33).

7. The spindle assembly of claim 1, wherein: the axle core subassembly still includes the retaining member, be provided with locking hole (34) on connecting piece (3), the retaining member set up in locking hole (34), and work as connecting piece (3) set up in when on first axle core section (1), the tip of retaining member with the surface butt cooperation of first axle core section (1), work as connecting piece (3) set up in when on second axle core section (2), the tip of retaining member with the surface butt cooperation of second axle core section (2).

8. The spindle assembly of claim 1, wherein: the relation between the outer diameter d1 of the first shaft core section (1) and the inner diameter d2 of the connecting piece (3) is d2-d1 which is less than or equal to 0.05 mm.

9. The spindle assembly of claim 1, wherein: the relation between the outer diameter d3 of the second axle core section (2) and the inner diameter d2 of the connecting piece (3) is d2-d3 which is less than or equal to 0.05 mm.

10. An electric spindle, characterized in that: comprising the spindle assembly of any one of claims 1 to 9.

11. Electric spindle according to claim 10, characterized in that: the electric main shaft comprises a first bearing seat (4) and a shell (5), the first bearing seat (4) is arranged at the end part of the shell (5), the first shaft core section (1) is arranged on the first bearing seat (4) through a bearing, and the joint of the first shaft core section (1) and the second shaft core section (2) is positioned at the joint of the first bearing seat (4) and the shell (5).

12. Electric spindle according to claim 11, characterized in that: the electric spindle further comprises a rotor, and the rotor is arranged on the second spindle core section (2).

Technical Field

The invention relates to the technical field of driving equipment, in particular to a shaft core assembly convenient to disassemble and assemble and an electric spindle.

Background

The electric spindle is a new technology for integrating a machine tool spindle and a spindle motor into a whole, the spindle is directly driven by a built-in motor, and the transmission of a gear, a belt or a coupler of a traditional spindle is cancelled, so that the length of a transmission chain of the machine tool spindle is shortened to zero, and the electric spindle is widely applied to the field of manufacturing of precision molds, automobiles, ships, aerospace and other tip products. The electric spindle is complex in structure, the spindle core is a core part of the electric spindle, the service lives of the bearings and the motor mainly affect the service life of the electric spindle, when the bearings in the electric spindle need to be replaced, spindle parts need to be completely removed and replaced, then the electric spindle is reassembled, the maintenance efficiency is low, the cost is high, meanwhile, in the process of assembling the electric spindle, the electric spindle needs to be assembled from the spindle core nose end to the tail portion, the assembly sequence cannot be changed, the number of electric spindle parts is large, the assembly structure is complex, and the assembly efficiency is low.

Disclosure of Invention

In order to solve the technical problem that the electric spindle needs to be completely dismantled and assembled from the bearing nose end to the tail end in the installation process, so that the assembly and disassembly efficiency is low, the shaft core assembly is divided into two parts, the two parts are connected by a connecting piece, and the two ends of the shaft core assembly are assembled respectively to reduce the assembly and disassembly difficulty, so that the shaft core assembly is convenient to assemble and disassemble, and the electric spindle is provided.

The utility model provides a shaft core subassembly, is applied to electric main shaft, shaft core subassembly includes first shaft core section, second shaft core section and two connecting pieces of intermeshing, one the connecting piece cover is located on the first shaft core section, another the connecting piece cover is located on the second shaft core section.

The end face of the connecting piece is provided with at least two connecting teeth, tooth grooves are formed between every two adjacent connecting teeth, and the connecting teeth on one connecting piece are matched with the tooth grooves on the other connecting piece.

The connecting teeth are fan-shaped.

The second end of the first shaft core section and the first end of the second shaft core section both form a circular truncated cone-shaped structure, and the connecting piece is provided with a conical hole matched with the circular truncated cone-shaped structure.

The connecting piece is provided with an adjusting mechanism, and the inner diameter of the connecting piece can be adjusted by the adjusting mechanism.

The connecting piece is provided with a broken opening, the broken opening forms the adjusting mechanism, and the inner diameter of the connecting piece is adjusted by adjusting the size of the broken opening.

The axle core subassembly still includes the retaining member, be provided with the locking hole on the connecting piece, the retaining member set up in the locking hole, and work as the connecting piece set up in when on the first axle core section, the tip of retaining member with the surface butt cooperation of first axle core section, work as the connecting piece set up in when on the second axle core section, the tip of retaining member with the surface butt cooperation of second axle core section.

The relation between the outer diameter d1 of the first shaft core section and the inner diameter d2 of the connecting piece is d2-d1 which is less than or equal to 0.05 mm.

The relation between the outer diameter d3 of the second axle core section and the inner diameter d2 of the connecting piece is d2-d3 which is less than or equal to 0.05 mm.

An electric spindle comprises the spindle core assembly.

The electric main shaft comprises a first bearing seat and a shell, the first bearing seat is arranged at the end part of the shell, the first core section is arranged on the first bearing seat through a bearing, and the joint of the first core section and the second core section is positioned at the joint of the first bearing seat and the shell.

The electric spindle further comprises a rotor, and the rotor is arranged on the second spindle core section.

The shaft core assembly and the electric spindle convenient to disassemble and assemble provided by the invention have the advantages that the shaft core is divided into the first shaft core section and the second shaft core section which are connected through the connecting piece, so that the assembly is convenient to respectively assemble from two ends, the interchangeability of parts is improved, the assembly sequence of parts of the electric spindle is changed, the disassembling and assembling difficulty is reduced, the automatic locking is realized by utilizing the matching of the circular truncated cone-shaped structure and the tapered hole of the connecting piece, the adjusting mechanism is arranged on the connecting piece, the connecting piece can be randomly adjusted in the axial position of the shaft core according to the bearing compression amount, the position accuracy of the fixing position of the bearing is improved, the fixed spacer ring matching and grinding procedures are reduced, in the abnormal or maintenance process of the electric spindle, only the locking hole on the corresponding connecting piece needs to be loosened, then the checking and the replacement are carried out, the original matching precision.

Drawings

Fig. 1 is a schematic structural view of a shaft core assembly and an electric spindle according to an embodiment of the shaft core assembly and the electric spindle which are convenient to disassemble and assemble;

fig. 2 is a schematic structural diagram of a connecting member of an embodiment of a shaft core assembly and an electric spindle which are convenient to disassemble and assemble according to the present invention;

FIG. 3 is another schematic structural diagram of a connecting member of an embodiment of a shaft core assembly and an electric spindle, which are convenient to disassemble and assemble, according to the present invention;

FIG. 4 is a cross-sectional view of an electric spindle of an embodiment of a shaft core assembly and an electric spindle convenient to disassemble and assemble according to the present invention;

in the figure:

1. a first mandrel segment; 2. a second mandrel segment; 3. a connecting member; 31. a connecting tooth; 32. a tooth socket; 33. opening breaking; 34. a locking hole; 4. a first bearing housing; 5. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The shaft core assembly shown in fig. 1 to 3 is applied to an electric spindle, and includes a first shaft core section 1, a second shaft core section 2 and two mutually engaged connecting pieces 3, one connecting piece 3 is sleeved on the first shaft core section 1, and the other connecting piece 3 is sleeved on the second shaft core section 2, so that the shaft core of the electric spindle in the prior art is divided into the first shaft core section 1 and the second shaft core section 2, and the two mutually engaged connecting pieces 3 are adopted for connection, and can be assembled from both ends respectively. The interchangeability of parts is improved, the assembly sequence of the parts is changed, and the assembly difficulty is reduced.

Be provided with two at least connection teeth 31 on the terminal surface of connecting piece 3, and adjacent two constitute tooth's socket 32 between the connection tooth 31, one on the connecting piece 3 connect tooth 31 and another on the connecting piece 3 the tooth's socket 32 cooperatees, utilizes the cooperation of connecting tooth 31 and tooth's socket 32 to realize the intermeshing between two connecting pieces 3 to guarantee the meshing reliability of two connecting pieces 3.

The connecting teeth 31 are shaped like a sector, so that the connecting teeth 31 are prevented from being disengaged from the tooth grooves 32 during the rotation of the first and second core segments 1 and 2.

The second end of the first mandrel section 1 and the first end of the second mandrel section 2 both form a truncated cone structure, the connecting piece 3 is provided with a tapered hole matched with the truncated cone structure, namely, the second end of the first mandrel section 1 is processed to form the truncated cone structure with the outer surface being a conical surface, and the inner surface of the tapered hole in the connecting piece 3 can be attached to the outer surface of the truncated cone structure, so that the self-locking of the connecting piece 3 and the corresponding first mandrel section 1 or second mandrel section 2 is realized, the fixing reliability of the connecting piece 3 is ensured, and the taper angle of the tapered hole is alpha.

The connecting piece 3 is provided with an adjusting mechanism, and the inner diameter of the connecting piece 3 can be adjusted by the adjusting mechanism, so that the connecting piece 3 can freely slide on the corresponding first shaft core section 1 or second shaft core section 2 along the axis direction according to the bearing compression amount, the position precision of the bearing fixing position is improved, and the fixed spacer ring grinding process is reduced.

The connecting piece 3 is provided with a broken opening 33, the broken opening 33 forms the adjusting mechanism, the inner diameter of the connecting piece 3 is adjusted by adjusting the size of the broken opening 33, when the size of the broken opening 33 is reduced, the inner diameter of the connecting piece 3 is reduced, and when the size of the broken opening 33 is increased, the inner diameter of the connecting piece 3 is increased, so that the position of the connecting piece 3 is conveniently adjusted in the axial direction.

The spindle core assembly further comprises a locking member (not shown in the figure, and the existing bolt and other structures can be adopted), a locking hole 34 is formed in the connecting member 3, the locking member is arranged in the locking hole 34, when the connecting member 3 is arranged on the first spindle core section 1, the end part of the locking member is in butt joint with the outer surface of the first spindle core section 1 to realize the locking of the connecting member 3 and the first spindle core section 1, when the connecting member 3 is arranged on the second spindle core section 2, the end part of the locking member is in butt joint with the outer surface of the second spindle core section 2 to realize the locking of the connecting member 3 and the second spindle core section 2, the length change of the protruding locking hole 34 of the locking member is utilized to realize whether the connecting member 3 is in butt joint with the corresponding first bearing section or second bearing section, so that the connecting member 3 is convenient to be detached, and the electric spindle is abnormal or, only need loosen locking hole 34 on the connecting piece 3 that corresponds, then inspect and change, need not to change former cooperation precision, guaranteed the efficiency and the accuracy of maintenance, simultaneously after the assembly is accomplished, can demolish or install locking hole 34, adjust the whole installation accuracy of electric main shaft, appear unusually in the use, also the sectional type is maintained and is examined, under not demolising all parts, the troubleshooting.

The relation between the outer diameter d1 of the first shaft core section 1 and the inner diameter d2 of the connecting piece 3 is d2-d1 which is not more than 0.05mm, so that the connecting piece 3 can move on the first shaft core section 1 conveniently.

The relation between the outer diameter d3 of the second shaft core section 2 and the inner diameter d2 of the connecting piece 3 is that d2-d3 is less than or equal to 0.05mm, so that the connecting piece 3 can move on the second shaft core section 2 conveniently.

An electric spindle as shown in figure 4 comprises the above-mentioned spindle core assembly.

The electric main shaft comprises a first bearing seat 4 and a shell 5, wherein the first bearing seat 4 is arranged at the end part of the shell 5, the first shaft core section 1 is arranged on the first bearing seat 4 through a bearing, and the joint of the first shaft core section 1 and the second shaft core section 2 is positioned at the joint of the first bearing seat 4 and the shell 5, so that the whole electric main shaft can be assembled and disassembled from two ends, the assembly sequence of changed parts of the electric main shaft is changed, and the assembly difficulty is reduced, wherein the shell 5 shown in the figure comprises a cooling sleeve.

The electric spindle further comprises a rotor, which is arranged on the second spindle section 2.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.