CN215580819U

CN215580819U - Press-fitting tool for hollow cup motor shell

Info

Publication number: CN215580819U
Application number: CN202121337314.2U
Authority: CN
Inventors: 赵岩龙
Original assignee: Shaanxi Topda Precision Equipment Co ltd
Current assignee: Shaanxi Topda Precision Equipment Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-18
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a press-fitting tool for a shell of a coreless motor, which is used for mutually positioning and isolating the shell and a stator assembly in the shell and press-fitting and molding the shell and the stator assembly in a non-contact state under the positioning and isolating state. The press fitting tool is a sleeve, the outer wall of the press fitting tool and the shell are in a close fit structure, the inner wall of the through hole penetrates through the shell and the stator assembly to be in a close fit structure, and a positioning circular bead which is larger than the outer diameter of the sleeve and used for positioning the shell is arranged at the end part of the sleeve, which is at the opposite end of one end where the shell and the stator assembly are tightly pressed. This pressure equipment frock is all fixed a position the isolation to both when casing and stator module assembly, keeps apart under the prerequisite of guaranteeing both relative assembly position, and the mutual contact in avoiding the cover to establish the assembling process and cause the problem of magnet steel damage that also exactly assembles under the state that both do not contact. The press fitting tool is beneficial to improving higher assembly precision of the shell and the stator assembly, and is convenient to disassemble quickly after assembly.

Description

Press-fitting tool for hollow cup motor shell

Technical Field

The utility model relates to the technical field of assembling of a stator of a coreless motor, in particular to a press-fitting tool for a shell of the coreless motor.

Background

The hollow cup motor belongs to a direct-current permanent magnet servo and control motor, has outstanding energy-saving characteristic, sensitive and convenient control characteristic and stable operation characteristic, and has very obvious technical advancement. As a high-efficiency energy conversion device, a development direction of a motor is represented in many fields. The hollow cup motor structurally breaks through the structural form of the rotor of the traditional motor, and adopts a rotor without an iron core, which is also called a hollow cup type rotor. The novel rotor structure completely eliminates the loss of electrical energy due to the formation of eddy currents in the core.

The stator of coreless motor has casing and stator module, wherein stator module includes the magnet steel that the hollow core axle and the hollow core axle overcoat were established, because the general preferred electrician's pure iron of casing material, establish the in-process of assembly when stator module and casing cover, there is great magnetic attraction between magnet steel and the casing, make the magnet steel adsorbed on one side inner wall of the casing easily, be difficult to separate, cause great assembly degree of difficulty, and the back is inhaled to the magnetism, the casing leads to the fact the damage to the magnet steel, influence later stage coreless motor moving quality and stability.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide a press-fitting tool for a shell of a coreless motor, which can position and isolate the shell and a stator component during assembly, and can be assembled under the condition that the shell and the stator component are not contacted, so that the problem of magnetic steel damage caused by mutual contact in the sleeving and assembling process is avoided.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: the press-fitting tool is used for mutually positioning and isolating the shell and the stator assembly in the shell and press-fitting and molding the shell and the stator assembly in a non-contact state under the positioning and isolating state.

Preferably, the press fitting tool is a sleeve with a through center hole, the outer wall of the sleeve and the shell are of a precise clearance fit structure, the inner wall of the through center hole and the stator assembly are of a precise clearance fit structure, and a positioning shoulder which is larger than the outer diameter of the sleeve and used for positioning the shell is arranged at the end part of the sleeve, which is at the opposite end of one end where the shell and the stator assembly are tightly pressed.

Preferably, a step for detaching the casing is arranged on one side, close to the casing, of the positioning shoulder.

Preferably, a plurality of first grooves are formed in the outer wall of the sleeve at intervals along the circumferential direction.

Preferably, a plurality of second grooves are formed in the inner wall of the through middle hole at intervals along the circumferential direction, and the second grooves and the first grooves are arranged in a staggered mode along the circumferential direction.

The utility model has the beneficial effects that: through this pressure equipment frock to both fix a position the isolation when casing and stator module assembly, keep apart under the prerequisite of guaranteeing both relative assembly positions, just assemble under the state that both do not contact, avoid the cover to establish the problem that the mutual contact in the assembling process and cause the magnet steel damage. And this pressure equipment frock helps improving higher assembly precision to casing and stator module to the effect of the quick frock of dismantling of being convenient for after the assembly.

Drawings

Fig. 1 is a press-fitting molding state diagram of the casing and the stator assembly through the press-fitting tool.

FIG. 2 is a schematic view of the present invention showing the fit between the casing and the magnetic steel and the sleeve.

Fig. 3 is an end view of the sleeve of the present invention.

Fig. 4 is a schematic view of press-fitting and forming of the casing and the stator assembly according to the present invention.

Fig. 5 is a sectional view of the overall structure of the stator assembly of the present invention.

Fig. 6 is a schematic view of the sleeve and stator assembly of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.

Referring to fig. 1 to 6, the press-fitting tool for a coreless motor casing is used for positioning and isolating a casing 10 and a stator assembly 20 in the casing 10 from each other, and press-fitting and molding the casing 10 and the stator assembly 20 in a state of not contacting each other in the positioning and isolating state. The stator assembly comprises a hollow mandrel 20a and magnetic steel 20b sleeved outside the hollow mandrel, a mandrel shoulder 20c at the end part of the hollow mandrel is pressed and fastened with the inner wall of one end of the shell, and after the mandrel shoulder is pressed and fastened, the shell and the magnetic steel outer wall of the stator assembly have an assembly gap (used for sleeving the hollow cup rotor) with a certain width. In order to avoid casing and stator module to the damage of magnet steel at the in-process of assembly, all fix a position the isolation to both when casing and stator module assembly through this pressure equipment frock, keep apart under the prerequisite of guaranteeing relative assembly position between them, just assemble under the state that both do not contact, avoid the cover to establish the problem that the mutual contact in the assembling process caused the magnet steel damage.

Specifically, the press fitting tool is a sleeve 1 which penetrates through the middle hole 101, the outer wall of the sleeve 1 and the casing 10 are in a precise clearance fit structure, the inner wall of the middle hole 101 penetrates through the stator assembly 20 and is in a precise clearance fit structure, and a positioning shoulder 11 which is larger than the outer diameter of the sleeve 1 and used for positioning the casing 10 is arranged at the end part of the sleeve 1, which is at the opposite end of one end of the casing 10 and the stator assembly 20, in a pressing mode. During assembly, the casing 10 is firstly sleeved on the outer wall of the sleeve 1, the casing is positioned through the positioning shoulder 11, then the stator assembly penetrates through the through middle hole 101 at one end of the sleeve 1 far away from the positioning shoulder 11 (specifically, the magnetic steel penetrates into the through middle hole 101, and the magnetic steel and the through middle hole are in precise clearance fit to avoid the assembly deviation of the positioning assembly and the casing, the same precise clearance fit of the casing and the outer wall of the sleeve also avoids the assembly deviation of the casing and the stator assembly, so that a precise clearance fit structure is formed by the casing and the stator assembly together with the inner wall and the outer wall of the sleeve 1 to be beneficial to improving the assembly precision of the casing and the stator assembly) until the mandrel shoulder contacts with the end part of the sleeve 1 (preferably, the length of the sleeve 1 is less than that of the casing, and the length is equal to the width of the mandrel shoulder, so that the whole stator assembly reaches the assembly position of the casing when the mandrel shoulder contacts with the outer wall of the sleeve 1, improving the assembly precision of the stator and the casing), then pressing and fastening the shoulder of the mandrel and the inner wall of the casing, and finally taking out the sleeve 1 to finish the rapid press-fitting and forming operation of the stator assembly and the casing. Preferably, sleeve 1 is whole to be the aluminum product and supports, and great magnetism between isolated magnet steel and the casing is inhaled the effect to can be convenient for take out sleeve 1 after the pressure equipment is accomplished.

Because the casing, the stator assembly and the sleeve are in a precise clearance fit structure, the clearance between the casing, the stator assembly and the sleeve is very small, and in order to conveniently detach the sleeve, the positioning shoulder 11 is provided with a step 11a for detaching the casing 10 on one side close to the casing 10. The step 11a allows a removal gap (102) between the sleeve and the housing, which facilitates the smooth removal of the sleeve using an auxiliary tool acting in the removal gap.

Because the fit clearance between casing and sleeve 1 outer wall is very little, a plurality of first recesses 1a have been seted up along circumference interval to the outer wall of sleeve 1. Through this first recess 1a guarantee that casing and sleeve realize reducing area of contact between them on the basis of accurate clearance fit, and then the frictional force when reducing the drawing of patterns, the less external force of convenient to use breaks away from casing and sleeve and dismantles.

Because the precision clearance fit clearance between stator module (magnet steel) and the sleeve 1 inner wall is very little, run through mesopore 101 inner wall and seted up a plurality of second recesses 1b along circumferential direction interval. Similarly, it is guaranteed through this second recess 1b that the contact area between the casing and the sleeve is reduced on the basis that tight fit is realized to stator module, and then frictional force when reducing the drawing of patterns, and the less external force of convenient to use breaks away from stator module and sleeve and dismantles. The second grooves 1b and the first grooves 1a are arranged in a staggered mode along the circumferential direction, so that the problem that the thickness of the sleeve at the position of the relative position is small due to the fact that the second grooves 1b are opposite to the first grooves 1a is solved, and the problem that the strength of the sleeve is insufficient is solved.

The principle of the utility model is as follows: through this pressure equipment frock to both fix a position the isolation when casing and stator module assembly, keep apart under the prerequisite of guaranteeing both relative assembly positions, just assemble under the state that both do not contact, avoid the cover to establish the problem that the mutual contact in the assembling process and cause the magnet steel damage. And this pressure equipment frock helps improving higher assembly precision to casing and stator module to be convenient for quick effect of dismantling after the assembly.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The press-fitting tool for the shell of the coreless motor is used for mutually positioning and isolating the shell (10) and a stator assembly (20) in the shell (10) and press-fitting and molding the shell (10) and the stator assembly (20) in a non-contact state under the positioning and isolating state.

2. The press fitting tool for the shell of the coreless motor as recited in claim 1, wherein: the pressure equipment frock is for having sleeve (1) that runs through mesopore (101), the outer wall of sleeve (1) is accurate clearance fit structure with casing (10), runs through mesopore (101) inner wall and stator module (20) and is accurate clearance fit structure to compress tightly the opposite end of one end at casing (10) and stator module (20) the tip of sleeve (1) is equipped with and is greater than sleeve (1) external diameter, and is used for location circular bead (11) of casing (10) location.

3. The coreless motor casing press-fitting tool of claim 2, wherein: and a step (11a) for detaching the shell (10) is arranged on one side, close to the shell (10), of the positioning shoulder (11).

4. The coreless motor casing press-fitting tool of claim 3, wherein: a plurality of first grooves (1a) are formed in the outer wall of the sleeve (1) at intervals along the circumferential direction.

5. The coreless motor casing press-fitting tool of claim 4, wherein: a plurality of second grooves (1b) are formed in the inner wall of the through middle hole (101) at intervals along the circumferential direction, and the second grooves (1b) and the first grooves (1a) are arranged in a staggered mode along the circumferential direction.