Servo motor casing

Abstract

The utility model provides a servo motor casing, and belongs to the technical field of motors. The problem that an existing machine shell is short in service life is solved. The servo motor shell comprises a front cylinder and an end cover fixed at the rear end of the front cylinder, a first convex ring and a second convex ring are formed on the inner side and the outer side of the front end face wall of the front cylinder respectively, a bearing cavity and an oil seal cavity are formed between the first convex ring and the front end face wall of the front cylinder and between the second convex ring and the front end face wall of the front cylinder respectively, and an annular groove is formed in the inner side wall of the first convex ring. A circle of straight holes are formed in the side wall of the first convex ring in a penetrating mode and evenly distributed in the circumferential direction of the first convex ring at intervals. The front end of the straight hole extends to the bottom wall of the annular groove, and the rear end of the straight hole extends to the outer side face of the first convex ring. The servo motor shell is long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a servo motor, in particular to a servo motor casing. Background Art

[0002] A servo motor is a motor whose rotation angle and speed can be precisely controlled and is often used in applications that require high-precision positioning and control.

[0003] The servo motor casing is one of the important components of the servo motor. Its structure is as disclosed in the Chinese Patent Library, a compact servo motor casing structure and servo motor (application number: 202222161541.5), including a base, which is a prismatic structure and has a rear end and a front end; the base is provided with a receiving hole passing through the rear end and the front end, and the receiving hole includes a stator hole position, a winding end cavity, a bearing hole position and an oil seal hole position arranged in sequence from the rear end to the front end; the winding end cavity is annular, and the winding end cavity is located on the outside of the bearing hole position in the radial direction.

[0004] In the above-mentioned housing structure, the bearing hole is a complete circular hole. After the bearing is pressed in, stress concentration is likely to occur on the side wall of the bearing hole, aggravating fatigue damage of the side wall of the bearing hole and affecting its service life. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a servo motor casing with a long service life.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a servo motor housing, including a front cylinder and an end cover fixed to the rear end of the front cylinder, the inner side and the outer side of the front end surface wall of the front cylinder are respectively formed with a first convex ring and a second convex ring, and a bearing cavity and an oil seal cavity are respectively formed between the first convex ring and the second convex ring and the front end surface wall of the front cylinder, characterized in that a circular ring groove coaxial with the first convex ring is provided on the inner side wall of the first convex ring, a circle of straight holes is penetrated through the side wall of the first convex ring, and the circle of straight holes is evenly distributed along the circumferential direction of the first convex ring; the straight holes are inclined, the front end of the straight holes extends to the bottom wall of the circular ring groove, and the rear end of the straight holes extends to the outer side surface of the first convex ring.

[0007] With the cooperation of the straight hole and the circular ring groove, the stress concentration at the first convex ring can be reduced, the fatigue damage rate of the first convex ring material can be delayed, and a heat dissipation channel can be formed to accelerate the heat dissipation of the bearing, thereby effectively extending the overall life of the servo motor.

[0008] At the same time, the straight hole is arranged at an angle, and the front and rear ends of the straight hole are respectively arranged on the inner side wall and the outer side wall of the first convex ring, so as to facilitate the forming of the straight hole.

[0009] In the servo motor housing, the inner side surface of the rear end of the first convex ring is a conical guide surface, and the diameter of the guide surface gradually increases from front to back. The guide surface is used for bearing installation guidance to facilitate housing assembly.

[0010] In the above-mentioned servo motor housing, a circle of first ribs is formed on the inner side of the front end wall of the front cylinder, the length of the first ribs extends along the radial direction of the front cylinder, and the two ends of the first ribs extend to the outer side of the first convex ring and the inner side of the front cylinder respectively. The first ribs can strengthen the strength of the first convex ring, make the housing structure more stable, and extend the service life.

[0011] In the above-mentioned servo motor housing, a circle of second ribs is formed on the outer side of the front end wall of the front cylinder, the length of the second ribs extends along the radial direction of the front cylinder, and one end of the second ribs extends to the outer side of the second convex ring. The second ribs can simultaneously strengthen the strength of the front end wall of the front cylinder and the second convex ring to more stably support the bearing and the oil seal.

[0012] In the above-mentioned servo motor housing, a retaining ring is formed on the outer side of the front end wall of the front cylinder, and the second convex ring is located inside the retaining ring. The retaining ring is arranged outside the second convex ring to play a radial protection role, so as to prevent the second convex ring from being deformed by external collision, so that the oil seal in the oil seal cavity is always stably supported, and the life of the motor is further extended.

[0013] In the above-mentioned servo motor housing, the end of the second rib away from the first protruding ring extends to the inner side surface of the retaining ring to further enhance the strength of the retaining ring.

[0014] In the above-mentioned servo motor housing, a plurality of heat dissipation grooves are provided on the outer side wall of the front cylinder. The heat dissipation grooves are in the shape of long strips, and the length of the heat dissipation grooves extends along the axial direction of the front cylinder to enhance the heat dissipation performance of the front cylinder and prolong the life of the motor.

[0015] In the above-mentioned servo motor housing, the front cylinder is an integrated structure and is formed in one step by machining, so that the front cylinder has better strength and sealing performance.

[0016] Compared with the prior art, this servo motor housing has the following advantages:

[0017] 1. With the cooperation of the straight hole and the circular ring groove, the stress concentration at the first convex ring can be reduced, the fatigue damage rate of the first convex ring material can be delayed, and a heat dissipation channel can be formed to accelerate the heat dissipation of the bearing, thereby effectively extending the overall life of the servo motor.

[0018] 2. The straight hole is arranged at an angle, and the front and rear ends of the straight hole are arranged on the inner wall and the outer wall of the first convex ring respectively, so as to facilitate the forming of the straight hole.

[0019] 3. A retaining ring is arranged outside the second convex ring to play a radial protection role, so as to prevent the second convex ring from being deformed by external collision, so that the oil seal in the oil seal cavity is always stably supported, thereby further extending the life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the servo motor casing.

[0021] Figure 2 This is a cross-sectional schematic diagram of the servo motor housing.

[0022] Figure 3 It is a three-dimensional schematic diagram of the front cylinder.

[0023] In the figure, 1, front cylinder; 1a, annular flange; 1b, first convex ring; 1b1, circular ring groove; 1b2, straight hole; 1b3, introduction surface; 1c, second convex ring; 1d, bearing cavity; 1e, oil seal cavity; 1f, first rib; 1g, second rib; 1h, retaining ring; 1i, heat dissipation groove; 2, end cover; 3, screw. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the servo motor housing includes a front cylinder 1 and an end cover 2 fixed to the rear end of the front cylinder 1, and the front cylinder 1 and the end cover 2 are coaxially arranged. Among them, the front end of the front cylinder 1 is an annular flange 1a, which is convenient for installing the servo motor; the rear end of the front cylinder 1 is axially provided with a circle of threaded holes, and the end cover 2 is fixedly connected to the front cylinder 1 by screws 3 screwed into the threaded holes.

[0026] In actual products, the front barrel 1 is an integrated structure and is formed in one step by machining, so that the front barrel 1 has better strength and sealing performance. Figures 1 to 3 As shown, the inner and outer sides of the front end surface wall of the front cylinder 1 are respectively integrally formed with a first convex ring 1b and a second convex ring 1c, the first convex ring 1b, the second convex ring 1c and the front cylinder 1 are coaxially arranged, and a bearing cavity 1d and an oil seal cavity 1e are respectively formed between the first convex ring 1b and the second convex ring 1c and the front end surface wall of the front cylinder 1.

[0027] in,

[0028] like Figure 2 As shown, a circular groove 1b1 coaxial with the first convex ring 1b is provided on the inner side wall of the first convex ring 1b, and a circle of straight holes 1b2 is formed through the side wall of the first convex ring 1b, and the circle of straight holes 1b2 is evenly distributed along the circumference of the first convex ring 1b. Figure 1As shown, the straight hole 1b2 is inclined, the front end of the straight hole 1b2 extends to the bottom wall of the annular groove 1b1, and the rear end of the straight hole 1b2 extends to the outer side of the first convex ring 1b. With the cooperation of the straight hole 1b2 and the annular groove 1b1, the stress concentration at the first convex ring 1b can be reduced, the fatigue damage rate of the material of the first convex ring 1b can be delayed, and a heat dissipation channel can be formed to accelerate the heat dissipation of the bearing, thereby effectively extending the overall life of the servo motor.

[0029] At the same time, the straight hole 1b2 is arranged at an angle, and the front and rear ends of the straight hole 1b2 are respectively arranged on the inner wall and the outer wall of the first convex ring 1b, so as to facilitate the forming of the straight hole 1b2.

[0030] Further explanation: the inner side surface of the rear end of the first convex ring 1b is a tapered introduction surface 1b3, and the diameter of the introduction surface 1b3 gradually increases from front to back. The introduction surface 1b3 is used for bearing installation guidance to facilitate housing assembly.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, a circle of first ribs 1f is formed on the inner side of the front end wall of the front cylinder 1, and the circle of first ribs 1f is evenly spaced along the circumference of the front cylinder 1. The length of the first rib 1f extends radially along the front cylinder 1, and the two ends of the first rib 1f extend to the outer side of the first convex ring 1b and the inner side of the front cylinder 1 respectively. The first rib 1f is provided to strengthen the strength of the first convex ring 1b, make the casing structure more stable, and extend the service life. A circle of second ribs 1g is also formed on the outer side of the front end wall of the front cylinder 1, and the circle of second ribs 1g is evenly spaced along the circumference of the front cylinder 1, the length of the second ribs 1g extends radially along the front cylinder 1, and one end of the second ribs 1g extends to the outer side of the second convex ring 1c. The second rib 1g is provided to simultaneously strengthen the strength of the front end wall of the front cylinder 1 and the second convex ring 1c, so as to more stably support the bearing and the oil seal.

[0032] In this embodiment, if Figure 1 and Figure 2 As shown, a retaining ring 1h is integrally formed on the outer side of the front end wall of the front cylinder 1, and the second convex ring 1c is inside the retaining ring 1h. The retaining ring 1h is arranged outside the second convex ring 1c to play a radial protection role, to prevent the second convex ring 1c from being deformed by external collision, so that the oil seal in the oil seal cavity 1e is always stably supported, further extending the life of the motor. Further explanation, the end of the second rib 1g away from the first convex ring 1b extends to the inner side of the retaining ring 1h to further strengthen the strength of the retaining ring 1h.

[0033] A plurality of heat dissipation grooves 1i are provided on the outer side wall of the front cylinder 1. The heat dissipation grooves 1i are long strips, and the length of the heat dissipation grooves 1i extends along the axial direction of the front cylinder 1 to enhance the heat dissipation performance of the front cylinder 1 and prolong the life of the motor. In the actual product, the front cylinder 1 is roughly a rectangular cylindrical structure, and a plurality of heat dissipation grooves 1i are provided on each side wall of the front cylinder 1.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A servo motor housing, comprising a front cylinder (1) and an end cover (2) fixed to the rear end of the front cylinder (1), wherein a first convex ring (1b) and a second convex ring (1c) are respectively formed on the inner side and the outer side of the front end surface wall of the front cylinder (1), and a bearing cavity (1d) and an oil seal cavity (1e) are respectively formed between the first convex ring (1b) and the second convex ring (1c) and the front end surface wall of the front cylinder (1), wherein: A circular groove (1b1) coaxial with the first convex ring (1b) is provided on the inner side wall of the first convex ring (1b); a circle of straight holes (1b2) is provided through the side wall of the first convex ring (1b), and the circle of straight holes (1b2) are evenly distributed along the circumference of the first convex ring (1b); the straight holes (1b2) are arranged in an inclined manner, the front ends of the straight holes (1b2) extend to the bottom wall of the circular groove (1b1), and the rear ends of the straight holes (1b2) extend to the outer side surface of the first convex ring (1b).

2. The servo motor housing according to claim 1, characterized in that: The inner side surface of the rear end of the first convex ring (1b) is a conical introduction surface (1b3), and the diameter of the introduction surface (1b3) gradually increases from front to back.

3. The servo motor housing according to claim 1 or 2, characterized in that: A circle of first ribs (1f) is formed on the inner side of the front end wall of the front cylinder (1); the length of the first ribs (1f) extends radially along the front cylinder (1), and the two ends of the first ribs (1f) extend to the outer side surface of the first convex ring (1b) and the inner side surface of the front cylinder (1), respectively.

4. The servo motor housing according to claim 3, characterized in that: A circle of second ribs (1g) is also formed on the outer side of the front end wall of the front cylinder (1); the length of the second ribs (1g) extends radially along the front cylinder (1), and one end of the second ribs (1g) extends to the outer side surface of the second convex ring (1c).

5. The servo motor housing according to claim 4, characterized in that: A retaining ring (1h) is also formed on the outer side of the front end wall of the front cylinder (1), and the second convex ring (1c) is located inside the retaining ring (1h).

6. The servo motor housing according to claim 5, characterized in that: The end of the second rib (1g) away from the first protruding ring (1b) extends to the inner side surface of the retaining ring (1h).

7. The servo motor housing according to claim 1, characterized in that: A plurality of heat dissipation grooves (1i) are provided on the outer side wall of the front cylinder (1), the heat dissipation grooves (1i) are in the shape of long strips, and the length of the heat dissipation grooves (1i) extends along the axial direction of the front cylinder (1).

8. The servo motor housing according to claim 1, characterized in that: The front cylinder (1) is an integrated structure and is formed in one step by machining.

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