Hollow cup brushless motor for spraying equipment

Abstract

The utility model discloses a coreless brushless motor for spraying equipment, which comprises a casing, a rotor assembly and a stator assembly are arranged in the casing, the rotor assembly is arranged in the stator assembly in a penetrating manner, the front end of the casing is in threaded connection with a front cover, the rear end of the casing is welded with a rear cover, the middle part of the front cover is provided with a shaft through hole, and the rotor assembly comprises a rotating shaft. The output end of the rotating shaft penetrates out of the shaft penetrating hole, a plurality of sealing ring grooves and a plurality of clamping spring grooves are formed in the penetrating-out end of the rotating shaft, and an oil seal assembling position is arranged between every two clamping spring grooves. According to the utility model, the front end of the rotating shaft is provided with the two sealing ring grooves and the five clamp spring grooves, and is provided with the oil seal assembly position, so that the motor has five layers of waterproof protection, and the problems of water-caused motor faults and the phenomenon that key parts of the bearing are rusted and stuck due to water inflow are solved.

Description

Technical Field

[0001] The utility model relates to a coreless brushless motor, in particular to a coreless brushless motor for spraying equipment. Background Art

[0002] At present, the hollow cup brushless motors used in spraying equipment on the market generally include a casing, a rotor assembly, a stator assembly, a front cover and a rear cover. The rotating shaft of the rotor assembly passes through the bearing of the front cover, and a clamping position is provided on the passing rotating shaft for connecting the nozzle. However, since the position where the rotating shaft is connected to the nozzle is not waterproof, the sprayed liquid is easy to overflow from the connection position between the rotating shaft and the nozzle, resulting in problems such as rust at the motor bearing position when exposed to water. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims to provide a coreless brushless motor for spraying equipment.

[0004] The purpose of the utility model is achieved through the following technical solutions: A hollow cup brushless motor for spraying equipment, including a housing, a rotor assembly and a stator assembly are arranged in the housing, the rotor assembly is inserted into the stator assembly, the front end of the housing is connected with a front cover by threading, the rear end of the housing is welded with a rear cover, the middle part of the front cover is provided with a shaft through-hole, the rotor assembly includes a rotating shaft, the output end of the rotating shaft passes through the shaft through-hole, and one end of the rotating shaft passing through is provided with a plurality of sealing ring grooves and a plurality of retaining ring grooves, wherein an oil seal assembly position is provided between two of the retaining ring grooves. The front end of the rotating shaft is provided with 2 sealing ring grooves and 5 retaining ring grooves, and an oil seal assembly position is provided, so that the motor has 5 layers of waterproof protection, and solves the problem of water-powered motor failure and the phenomenon of key bearing components being rusted and stuck due to water ingress. The housing, front cover and rear cover are all made of stainless steel material, which has good corrosion resistance and prevents the motor housing from rusting due to high humidity.

[0005] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, the inner side of the front cover is provided with a front bearing installation groove, the front bearing is arranged in the front bearing installation groove, the rotating shaft passes through the front bearing, the edge of the front cover is provided with an installation step, a plurality of installation countersunk holes are arranged at intervals on the installation step, and the outer side wall of the front bearing installation groove is provided with an external thread and a coaxiality positioning step. Both the installation step and the coaxiality positioning step can locate the coaxiality of the motor shaft.

[0006] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, the front inner side wall of the casing is provided with an internal thread and a positioning step, the external thread of the front cover is screwed with the internal thread of the casing, and the coaxial positioning step abuts against the positioning step.

[0007] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, the middle part of the rear cover is provided with a rear bearing mounting groove and a cover plate mounting groove, the rear bearing is provided in the rear bearing mounting groove, the inner side wall of the cover plate mounting groove is provided with an internal thread, the threaded cover plate is screwed in the cover plate mounting groove, the rear end of the shaft is passed through the rear bearing, and the threaded cover plate can push the rear bearing to move when rotating clockwise. The threaded cover plate facilitates the adjustment of the axial stringing of the shaft, so that the axial stringing amount of the shaft is less than 0.1mm, so as to achieve better consistency of the effect when spraying paint.

[0008] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, the rotor assembly also includes a magnet, a front copper sleeve and a rear copper sleeve. The magnet sleeve is arranged on the rotating shaft, the front copper sleeve abuts against the front end of the magnet, and the rear copper sleeve abuts against the rear end of the magnet. A series adjustment spring is provided between the rear copper sleeve and the rear bearing.

[0009] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, a PCB bracket is further provided in the casing, a PCB board is fixed on the PCB bracket, an electrical connecting wire is provided on the PCB board, and the electrical connecting wire is fixed by a wire clip.

[0010] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, a wire hole is provided at the edge of the rear cover, and the lead wire is inserted through the wire hole and electrically connected to the PCB board.

[0011] As an improvement of the hollow cup brushless motor for spraying equipment of the utility model, the stator assembly includes a coil and an iron core, the coil is inserted into the iron core, and the other end of the electrical connection line is connected to the coil.

[0012] The beneficial effect of the utility model is that the utility model is provided with 2 sealing ring grooves and 5 retaining ring grooves at the front end of the rotating shaft, and an oil seal assembly position is provided, so that the motor has 5 layers of waterproof protection, and solves the problem of water-powered motor failure and the phenomenon of key bearing parts being rusted and stuck due to water ingress. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the utility model;

[0014] The accompanying drawings are marked as follows: 1, casing, 2, rotor assembly, 3, stator assembly, 4, front cover, 5, rear cover, 6, positioning step, 7, threaded cover plate, 8, serial adjustment spring, 9, PCB bracket, 10, PCB board, 11, electrical connecting line, 12, wire card, 13, lead, 21, rotating shaft, 22, sealing ring groove, 23, retaining ring groove, 24, oil seal assembly position, 25, magnet, 26, front copper sleeve, 27, rear copper sleeve, 31, coil, 32, iron core, 41, front bearing mounting groove, 42, front bearing, 43, mounting step, 44, mounting countersunk hole, 45, external thread, 46, coaxiality positioning step, 51, rear bearing mounting groove, 52, cover plate mounting groove, 53, rear bearing. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0017] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0018] like Figure 1As shown, a coreless brushless motor for spraying equipment includes a housing 1, a rotor assembly 2 and a stator assembly 3 are arranged in the housing 1, the rotor assembly 2 is inserted into the stator assembly 3, the front end of the housing 1 is connected with a front cover 4 by threading, the rear end of the housing 1 is welded with a rear cover 5, the middle part of the front cover 4 is provided with a shaft through-hole, the rotor assembly 2 includes a rotating shaft 21, the output end of the rotating shaft 21 passes through the shaft through-hole, and one end of the rotating shaft 21 passing through is provided with a plurality of sealing ring grooves 22 and a plurality of retaining ring grooves 23, wherein an oil seal assembly position 24 is provided between two retaining ring grooves 23. The front end of the rotating shaft 21 is provided with two sealing ring grooves and five retaining ring grooves, and an oil seal assembly position is provided, so that the motor has five layers of waterproof protection, and solves the problem of water-powered motor failure and the phenomenon of key bearing components being rusted and stuck due to water ingress. The motor housing, front cover and rear cover are all made of stainless steel material, and the stainless steel material has good corrosion resistance, which prevents the motor housing from rusting due to high humidity.

[0019] Preferably, the inner side of the front cover 4 is provided with a front bearing installation groove 41, a front bearing 42 is provided in the front bearing installation groove 41, the rotating shaft 21 passes through the front bearing 42, the edge of the front cover 4 is provided with an installation step 43, a plurality of installation countersunk holes 44 are arranged at intervals on the installation step 43, and an outer side wall of the front bearing installation groove 41 is provided with an external thread 45 and a coaxiality positioning step 46. Both the installation step 43 and the coaxiality positioning step 46 can locate the coaxiality of the motor shaft.

[0020] Preferably, the front inner side wall of the casing 1 is provided with an internal thread and a positioning step 6 , the external thread of the front cover 4 is screwed with the internal thread of the casing 1 , and the coaxial positioning step 46 abuts against the positioning step 6 .

[0021] Preferably, a rear bearing mounting groove 51 and a cover plate mounting groove 52 are provided in the middle of the rear cover 5, the rear bearing mounting groove 51 and the cover plate mounting groove 52 are connected, a rear bearing 53 is provided in the rear bearing mounting groove 51, an inner wall of the cover plate mounting groove 52 is provided with an internal thread, a threaded cover plate 7 is screwed in the cover plate mounting groove 52, the rear end of the rotating shaft 21 is passed through the rear bearing 53, and the threaded cover plate 7 can push the rear bearing 53 to move when rotating clockwise. The threaded cover plate 7 facilitates the adjustment of the axial stringing of the rotating shaft 21, so that the axial stringing amount of the rotating shaft is less than 0.1 mm, so as to achieve a better consistency of the effect when spraying paint.

[0022] Preferably, the rotor assembly 2 also includes a magnet 25, a front copper sleeve 26 and a rear copper sleeve 27. The magnet 25 is sleeved on the rotating shaft 21, the front copper sleeve 26 abuts against the front end of the magnet 25, and the rear copper sleeve 27 abuts against the rear end of the magnet 25. A series adjustment spring 8 is provided between the rear copper sleeve 27 and the rear bearing 53.

[0023] Preferably, a PCB bracket 9 is further provided in the housing 1 , a PCB board 10 is fixed on the PCB bracket 9 , an electrical connection line 11 is provided on the PCB board 10 , and the electrical connection line 11 is fixed by a line card 12 .

[0024] Preferably, a wire hole is provided on the edge of the back cover 5 , and the lead wire 13 passes through the wire hole and is electrically connected to the PCB board 10 .

[0025] Preferably, the stator assembly 3 includes a coil 31 and an iron core 32 , the coil 31 is inserted into the iron core 32 , and the other end of the electrical connection line 11 is connected to the coil 31 .

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and structures of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coreless brushless motor for spraying equipment, comprising a housing, wherein a rotor assembly and a stator assembly are arranged in the housing, wherein the rotor assembly is inserted into the stator assembly, and wherein: The front end of the casing is connected to a front cover by threads, and the rear end of the casing is welded with a rear cover. The middle of the front cover is provided with an axis through hole. The rotor assembly includes a rotating shaft, and the output end of the rotating shaft passes through the shaft through the shaft through the shaft through hole. The end of the rotating shaft passing through is provided with a plurality of sealing ring grooves and a plurality of retaining ring grooves, wherein an oil seal assembly position is provided between two of the retaining ring grooves.

2. The coreless brushless motor for spraying equipment according to claim 1, characterized in that: The inner side surface of the front cover is provided with a front bearing mounting groove, a front bearing is arranged in the front bearing mounting groove, the rotating shaft passes through the front bearing, an installation step is provided at the edge of the front cover, a plurality of installation countersunk holes are arranged at intervals on the installation step, and an external thread and a coaxial positioning step are provided on the outer side wall of the front bearing mounting groove.

3. The coreless brushless motor for spraying equipment according to claim 2, characterized in that: The front inner side wall of the housing is provided with an internal thread and a positioning step, the external thread of the front cover is screwed with the internal thread of the housing, and the coaxial positioning step abuts against the positioning step.

4. The coreless brushless motor for spraying equipment according to claim 3, characterized in that: A rear bearing mounting groove and a cover plate mounting groove are provided in the middle of the rear cover, a rear bearing is provided in the rear bearing mounting groove, an inner wall of the cover plate mounting groove is provided with an internal thread, a threaded cover plate is screwed in the cover plate mounting groove, a rear end of the rotating shaft is passed through the rear bearing, and when the threaded cover plate rotates clockwise, it can push the rear bearing to move.

5. The coreless brushless motor for spraying equipment according to claim 4, characterized in that: The rotor assembly also includes a magnet, a front copper sleeve and a rear copper sleeve. The magnet sleeve is arranged on the rotating shaft, the front copper sleeve abuts against the front end of the magnet, and the rear copper sleeve abuts against the rear end of the magnet. A series adjustment spring is arranged between the rear copper sleeve and the rear bearing.

6. The coreless brushless motor for spraying equipment according to claim 3, characterized in that: A PCB bracket is also provided in the housing, a PCB board is fixed on the PCB bracket, an electrical connection line is provided on the PCB board, and the electrical connection line is fixed by a line card.

7. The coreless brushless motor for spraying equipment according to claim 6, characterized in that: The edge of the rear cover is provided with a wire hole, and the lead wire passes through the wire hole and is electrically connected to the PCB board.

8. The coreless brushless motor for spraying equipment according to claim 6, characterized in that: The stator assembly comprises a coil and an iron core, the coil is inserted into the iron core, and the other end of the electrical connection line is connected to the coil.

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