Waterproof and oil-proof structure of servo motor

Abstract

The utility model discloses a waterproof and oil-proof structure of a servo motor, which is applied to the servo motor. The servo motor comprises a motor shell, a rear end cover and a winding wire, an encoder shell is arranged on the rear end cover, an encoder is arranged in the encoder shell, and the encoder is connected with an encoder wire; one side of the encoder shell is provided with a connecting seat, and the upper end of the connecting seat is matched with a pressing block; two lower groove holes are obliquely formed in one side of the connecting base, two upper groove holes matched with the lower groove holes are obliquely formed in one side of the pressing block, and the lower groove holes and the upper groove holes are matched to form a first wire outlet hole and a second wire outlet hole which are communicated with the encoder shell. A winding wire penetrates through the rear end cover from the interior of the motor shell, enters the encoder shell and penetrates out of the motor shell through the first wire outlet hole; and the encoder wire is led out of the encoder shell and penetrates out of the motor shell through the second wire outlet hole. The waterproof oil-proof structure can improve waterproof and oil-proof performance and has the advantages of being compact in structure and good in assembly effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor field, especially a kind of waterproof oil-proof structure of servo motor. BACKGROUND

[0002] In many industrial environments, servo motors are threatened by oil and moisture. For example, in a machine shop, there can be splashes of lubricating oil around the machine, or in some humid production environments, the motor is easy to contact water vapor. The traditional servo motor structure can be insufficient in waterproofing, which can cause the winding wire, encoder and other components inside the motor to be easily eroded, affecting the performance and service life of the motor. The existing servo motor structure lacks effective waterproofing design for the encoder wire and winding wire outlet, and during the operation of the motor, oil and moisture enter the motor through the outlet hole and other parts, affecting the normal operation of the encoder and winding. The servo motor structure in the prior art is not tight enough, which can cause low assembly efficiency and assembly errors, affecting the overall sealing of the motor. SUMMARY

[0003] The utility model aims at providing a kind of waterproof oil-proof structure of servo motor. The utility model can improve waterproofing performance, with the characteristics of compact structure and good assembly effect.

[0004] The technical scheme of the utility model: a kind of waterproof oil-proof structure of servo motor, applied to servo motor;The servo motor includes motor shell, rear end cover and winding wire, and the rear end cover is provided with encoder shell, and the encoder shell is provided with encoder, and the encoder is connected with encoder wire;One side of the encoder shell is provided with connecting seat, and the upper end of the connecting seat is matched with pressing block;Two lower slot holes are obliquely arranged on one side of the connecting seat, and two upper slot holes matched with the lower slot hole are obliquely arranged on one side of the pressing block, and the lower slot hole and the upper slot hole are matched to form the first outlet hole and the second outlet hole communicated with the encoder shell;The winding wire passes through the rear end cover from the motor shell and enters the encoder shell and is led to the motor shell outside through the first outlet hole;The encoder wire is led out from the encoder shell and is led to the motor shell outside through the second outlet hole.

[0005] In the foregoing waterproof oil-proof structure of servo motor, the connecting seat is provided with a first hole group, the pressing block is provided with an assembly guide slot corresponding to the first hole group, the bottom of the assembly guide slot is provided with a second hole group matched with the first hole group, and the connecting seat and the pressing block are fixedly connected with the encoder shell by screwing through the assembly guide slot and the first hole group in sequence.

[0006] In the foregoing waterproof oil-proof structure of servo motor, the connecting seat and the encoder shell are provided with a third hole group, and the pressing block is provided with a group of positioning rods arranged in the third hole group.

[0007] The waterproof and oil-proof structure of the servo motor has a plurality of ring grooves in the lower groove hole.

[0008] The waterproof and oil-proof structure of the servo motor has a plurality of ring grooves in the lower groove hole.

[0009] The waterproof and oil-proof structure of the servo motor has a plurality of ring grooves in the lower groove hole.

[0010] The waterproof and oil-proof structure of the servo motor has a plurality of ring grooves in the lower groove hole.

[0011] Compared with the prior art, the waterproof and oil-proof structure of the servo motor has the following beneficial effects:

[0012] The first and second wire exit holes are formed by the cooperation of the connecting seat and the pressing block, so that the winding wire and the encoder wire pass through the motor shell through the first and second wire exit holes, the water and oil are blocked, and the water and oil in the outside are effectively prevented from entering the servo motor. The connecting seat, the encoder shell, the rear end cover and the motor shell are connected, and a tight assembly relationship is realized, which helps to build a tight overall structure. In addition, the limiting gap can prevent the winding wire and the encoder wire from being abraded during the wire exit process. The ring grooves in the lower groove hole can clamp and fix the winding wire and the encoder wire and prevent water and oil from penetrating into the motor shell along the wire. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the front view of the utility model;

[0014] Figure 2 is the structure explosion of the utility model Figure 1 ;

[0015] Figure 3 is the structure explosion of the utility model Figure 2 .

[0016] The marks in the drawings are: 1, motor shell; 2, rear end cover; 3, winding wire; 4, encoder shell; 5, encoder; 6, encoder wire; 7, connecting seat; 8, pressing block; 9, lower groove hole; 10, upper groove hole; 11, first wire exit hole; 12, second wire exit hole; 13, first hole group; 14, assembly guide groove; 15, second hole group; 16, third hole group; 17, positioning rod; 18, ring groove; 19, limiting gap. DETAILED DESCRIPTION

[0017] The utility model will be further explained in connection with the drawings and examples below, but not as the basis for the utility model limit.

[0018] Embodiment: a waterproof and oil-proof structure of servo motor, constitute as Figures 1-3 Indicated, applied to servo motor on;Servo motor includes motor casing 1, rear end cover 2 and winding wire 3.Motor body is used to receive starting signal, starts work according to starting signal, to output angular displacement, angular velocity, to drive mechanical element rotation.Servo motor inside is provided with motor shaft, and the motor shaft is used to output angular displacement and angular velocity.Rear end cover 2 is equipped with encoder housing 4, and encoder housing 4 is equipped with encoder 5, and encoder 5 is used to measure the angular displacement and angular velocity that servo motor shaft outputs.Encoder 5 is connected with encoder wire 6, and encoder 5 converts angular displacement and angular velocity into feedback signal and feeds back feedback signal to controller through encoder wire 6, to make controller control motor body according to feedback signal.As Figure 1 Indicated, the side of encoder housing 4 is equipped with connecting seat 7, and the upper end of connecting seat 7 is matched with pressing block 8;The side of connecting seat 7 is obliquely equipped with two lower slot holes 9, and the side of pressing block 8 is obliquely equipped with two upper slot holes 10 matched with lower slot hole 9, and lower slot hole 9 and upper slot hole 10 are matched to form first wire outlet hole 11 and second wire outlet hole 12 communicated with encoder housing 4.Winding wire 3 passes through rear end cover 2 from motor casing 1 into encoder housing 4 and is worn to motor casing 1 outside through first wire outlet hole 11;Encoder wire 6 is led out from encoder housing 4 and is worn to motor casing 1 outside through second wire outlet hole 12.Winding wire 3 is used to transmit power voltage signal to drive servo motor shaft to output angular velocity and angular displacement.Encoder wire 6 is used to transmit feedback signal to feedback angular velocity and angular displacement that servo motor shaft outputs.

[0019] As Figure 2 Indicated, first hole group 13 is equipped on connecting seat 7, and assembly guide slot 14 corresponding with first hole group 13 is equipped on pressing block 8, and the bottom of assembly guide slot 14 is equipped with second hole group 15 matched with first hole group 13, and connecting seat 7 and pressing block 8 are fixedly connected with encoder housing 4 through screw sequentially passing through assembly guide slot 14 and first hole group 13.Connecting seat 7 and encoder housing 4 are equipped with third hole group 16, and pressing block 8 is equipped with a group of positioning rods 17 worn in third hole group 16.Two ring grooves 18 are equipped in lower slot hole 9, and the end of lower slot hole 9 communicated with encoder housing 4 is equipped with limiting notches 19.This structure passes through the axis of first wire outlet hole 11 and second wire outlet hole 12 and is inclined to servo motor shaft, so that winding wire 3 and encoder wire 6 worn from first wire outlet hole 11 and second wire outlet hole 12 are all worn in the direction inclined to servo motor shaft, and the bending angle of cable part on both sides of connecting seat 7 is larger when wearing, and the setting of limiting notches 19 can reduce the cable fatigue and breakage caused by too small bending angle of cable.

[0020] As shown in Figure 3 The four corners of the motor housing 1 are fixedly connected with the rear end cover 2 through short screws. The four corners of the motor housing 1 are fixedly connected with the rear end cover 2 and the encoder housing 4 through long screws.

[0021] The structure forms the first wire outlet hole 11 and the second wire outlet hole 12 through the cooperation of the connecting seat 7 and the pressing block 8, so that the winding wire 3 and the encoder wire 6 pass through the first wire outlet hole and the second wire outlet hole 12 to exit the motor housing 1, which not only ensures the normal lead-out of the wire, but also blocks water and oil, effectively preventing water and oil from entering the servo motor. The structure realizes a tight assembly relationship through the cooperation of the connecting seat 7 and the pressing block 8, the connection of the connecting seat 7 and the encoder housing 4, the connection of the rear end cover 2 and the encoder housing 4, and the connection of the rear end cover 2 and the motor housing 1, which helps to build a tight overall structure. In addition, the structure can prevent the winding wire 3 and the encoder wire 6 from being abraded during the wire-out process through the limiting gap 19. The structure sets the ring groove 18 in the lower groove hole 9, so that when cooperating with the pressing block 8, it can clamp and fix the winding wire 3 and the encoder wire 6, and prevent water and oil from seeping into the motor housing 1 along the wire.

[0022] Installation process

[0023] The connecting seat 7 is installed on one side of the encoder housing 4, so that the upper end of the connecting seat 7 can cooperate with the pressing block 8. Two lower groove holes 9 are inclinedly arranged on one side of the connecting seat 7, and two upper groove holes 10 that cooperate with the lower groove holes 9 are inclinedly arranged on one side of the pressing block 8. The lower groove hole 9 and the upper groove hole 10 cooperate to form the first wire outlet hole 11 and the second wire outlet hole 12 that communicate with the encoder housing 4.

[0024] The connecting seat 7 is provided with a first hole group 13, the pressing block 8 is provided with an assembly guide groove 14 corresponding to the first hole group 13, and the bottom of the assembly guide groove 14 is provided with a second hole group 15 corresponding to the first hole group 13. The connecting seat 7 and the pressing block 8 are fixedly connected with the encoder housing 4 by screwing through the assembly guide groove 14 and the first hole group 13 in sequence. The connecting seat 7 and the encoder housing 4 are provided with a third hole group 16, and the pressing block 8 is provided with a group of positioning rods 17 arranged in the third hole group 16, so as to further ensure the installation position accuracy of the connecting seat 7 and the pressing block 8.

[0025] The winding wire 3 enters the encoder housing 4 from the motor housing 1 through the rear end cover 2, and then passes to the outside of the motor housing 1 through the first wire outlet hole 11. The encoder wire 6 is led out from the encoder housing 4 and passes to the outside of the motor housing 1 through the second wire outlet hole 12. Since the axes of the first wire outlet hole 11 and the second wire outlet hole 12 are arranged to be inclined relative to the shaft of the servo motor, the folding angles of the cable portions on both sides of the connecting seat 7 are large when passing out, and the end of the lower slot hole 9 communicating with the encoder housing 4 is provided with a limiting notch 19, so that the cable fatigue and damage caused by the too small folding angle of the cable can be reduced.

[0026] In summary, the utility model discloses can improve waterproof and oil-proof performance, has the characteristics of compact structure and good assembly effect.

Claims

1. A waterproof and oil-proof structure for a servo motor, applied to a servo motor; the servo motor includes a motor housing (1), a rear end cover (2), and winding wires (3), an encoder housing (4) is provided on the rear end cover (2), an encoder (5) is provided inside the encoder housing (4), and the encoder (5) is connected to an encoder wire (6); characterized in that: The encoder housing (4) has a connecting seat (7) on one side, and a pressure block (8) is fitted on the upper end of the connecting seat (7); the connecting seat (7) has two lower slot holes (9) on one side at an angle, and the pressure block (8) has two upper slot holes (10) on one side at an angle that fit with the lower slot holes (9). The lower slot holes (9) and the upper slot holes (10) fit together to form a first wire outlet hole (11) and a second wire outlet hole (12) that communicate with the encoder housing (4); the winding wire (3) passes through the rear end cover (2) from inside the motor housing (1) and enters the encoder housing (4) and passes through the first wire outlet hole (11) to the outside of the motor housing (1); the encoder wire (6) is led out from inside the encoder housing (4) and passes through the second wire outlet hole (12) to the outside of the motor housing (1).

2. The waterproof and oil-proof structure of the servo motor according to claim 1, characterized in that: The connecting seat (7) is provided with a first hole group (13), and the pressure block (8) is provided with an assembly guide groove (14) corresponding to the first hole group (13). The bottom of the assembly guide groove (14) is provided with a second hole group (15) that cooperates with the first hole group (13). The connecting seat (7) and the pressure block (8) are fixedly connected to the encoder housing (4) by screws passing through the assembly guide groove (14) and the first hole group (13) in sequence.

3. The waterproof and oil-proof structure of the servo motor according to claim 2, characterized in that: The connecting seat (7) and the encoder housing (4) are provided with a third hole group (16), and the pressure block (8) is provided with a set of positioning rods (17) passing through the third hole group (16).

4. The waterproof and oil-proof structure of the servo motor according to claim 1, characterized in that: The lower slot (9) is provided with multiple annular grooves (18).

5. The waterproof and oil-proof structure of the servo motor according to claim 1, characterized in that: The lower slot (9) is provided with a limiting notch (19) at one end that communicates with the encoder housing (4).

6. The waterproof and oil-proof structure of the servo motor according to claim 1, characterized in that: The four corners of the motor housing (1) are fixedly connected to the rear end cover (2) by short screws.

7. The waterproof and oil-proof structure of the servo motor according to claim 5, characterized in that: The four corners of the motor housing (1) are fixedly connected to the rear end cover (2) and the encoder housing (4) by long screws.

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