Gear motor

Abstract

The utility model belongs to the technical field of motors, and in particular, relates to a reduction motor. A reduction motor comprises a motor housing and a reduction box body, wherein the motor housing is provided with an axial opening, and the reduction box body comprises a connecting portion connected to the opening of the motor housing, and the circumferential outer edge of the connecting portion is provided with at least two axial through holes for a locking member to pass through, and the inner wall of the motor housing is provided with an annular groove opening radially inward, and the annular groove is axially closed, and an annular fixing member is embedded in the annular groove, and the annular fixing member has an opening that enables the annular fixing member to shrink circumferentially, and the annular fixing member is provided with at least two fixing portions extending radially inward, and the fixing portion is provided with a locking hole with an axial opening and corresponding to the through hole one by one, and the locking member passes through the through hole and is threadedly matched with the locking hole. The utility model has the advantage of making the overall structure of the motor more compact.

Description

Technical Field

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

[0002] The reduction motor mainly includes a motor body and a reduction box. Some motor bodies include a front end cover fixedly connected to the motor housing. The housing of the reduction box and the front end cover are fixedly connected by a locking piece. However, the motor body with the front end cover will increase the axial length of the entire motor.

[0003] At present, the axial length of the motor is optimized by removing the front cover and directly fixing the reduction box body and the motor housing with a locking piece. For example, the Chinese patent with application number 202121347326.3 discloses a planetary right-angle reduction motor, which provides a locking hole at the connecting end of the motor housing and the reduction box body, and achieves the fixation between the reduction box body and the motor housing through the cooperation of the locking piece and the locking hole. However, the provision of locking holes on the motor housing or the reduction box body requires thickening the wall thickness of the motor housing and the reduction box body; this will cause the radial size of the entire motor to increase, which is not conducive to the installation and use of the motor in a small space, such as using the motor in a sliding door. Utility Model Content

[0004] The utility model aims to provide a reduction motor which makes the overall structure of the motor more compact.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a reduction motor, comprising a motor housing and a reduction box housing, the motor housing is axially opened, the reduction box housing comprises a connecting portion connected to the opening of the motor housing, the circumferential outer edge of the connecting portion is provided with at least two axial through holes for the locking member to pass through, the inner wall of the motor housing is provided with an annular groove opening radially inward, the annular groove is axially closed, an annular fixing member is embedded in the annular groove, the annular fixing member has an opening that can cause the annular fixing member to shrink circumferentially, the annular fixing member is provided with at least two fixing portions extending radially inward, the fixing portion is provided with a locking hole with an axial opening and corresponding to the through hole one by one, the locking member passes through the through hole and is threadedly engaged with the locking hole.

[0006] By arranging an annular groove on the inner wall of the motor housing, arranging an annular fixing piece in the annular groove, arranging a fixing portion on the annular fixing piece and arranging a locking hole on the fixing portion, there is no need to increase the wall thickness of the motor housing and the reduction gear box body, thereby optimizing the radial occupied space of the fixed end of the motor housing and the reduction gear box body, making the structure of the entire motor more compact and facilitating the use of the motor in a smaller space scenario.

[0007] At the same time, the annular fixing piece has an opening that can cause the annular fixing piece to shrink in the circumferential direction, which can facilitate the annular fixing piece to deform and be embedded and installed in the annular groove.

[0008] Preferably, the annular fixing member is elastic and has a tendency to expand circumferentially outward in the annular fixing groove.

[0009] The annular fixing piece is annular and has a tendency to expand outward, thereby ensuring that the circumferential outer wall of the annular fixing piece is closely fitted with the circumferential inner wall of the annular groove, so that the annular fixing piece will not fall off.

[0010] Preferably, the annular fixing member is partially embedded in the annular groove, and the radial width of the annular fixing member is greater than the radial depth of the annular groove.

[0011] The annular fixing piece is partially embedded in the annular groove, so that the radial depth of the annular groove is set deeper, thereby not increasing the wall thickness of the motor housing, and thus not increasing the radial space of the motor housing; at the same time, the annular fixing piece has its own elasticity, so that it can be partially embedded in the annular groove and partially exposed on the outside of the annular groove.

[0012] Preferably, the locking member is a bolt, and the diameter of the through hole is larger than the diameter of the threaded section of the bolt.

[0013] The diameter of the through hole is larger than the diameter of the threaded section of the bolt, so that the bolt has a larger space for adjustment, which facilitates the bolt to be threadedly matched with the locking hole of the fixing part after passing through the through hole.

[0014] Preferably, the connecting portion is provided with a plurality of radially extending reinforcing ribs.

[0015] Since the wall thickness of the reduction gear box body is set to be relatively thin in this solution, in order to ensure the strength, reinforcing ribs are set at the connection part of the reduction gear box body, thereby enhancing the strength of the reduction gear box body.

[0016] Preferably, an annular extension portion extending axially toward the motor housing is provided at the circumferential inner edge of the end surface of the connecting portion of the reduction gear box body facing the motor housing, and the circumferential outer wall of the annular extension portion is in contact with the circumferential inner wall of the motor housing.

[0017] The radial positioning between the reduction gear box housing and the motor housing is achieved by the circumferential outer wall of the annular extension part being in contact and fit with the circumferential inner wall of the motor housing.

[0018] Preferably, the outer diameter of the connecting portion is the same as the outer diameter of the opening of the motor housing.

[0019] The outer diameter of the connecting portion is the same as the outer diameter of the opening of the motor housing, which can fully meet the mutual assembly requirements between the two without increasing the length in the radial direction, and the structure is more compact.

[0020] The utility model has the advantage of making the overall structure of the motor more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 for Figure 1 Explosion diagram.

[0023] Figure 3 for Figure 1 sectional view of .

[0024] Figure 4 for Figure 1 A cross-sectional view from another angle.

[0025] Figure 5 It is a schematic diagram of the structure of the motor housing.

[0026] Figure 6 It is a schematic diagram of the structure of the bottom of the reduction gearbox housing.

[0027] Figure 7 It is a schematic diagram of the structure of the annular fixing member.

[0028] Figure numbers: 1. Motor housing; 2. Reducer housing; 21. Through hole; 22. Worm placement chamber; 23. Worm wheel placement chamber; 24. Connecting part; 25. Reinforcing rib; 3. Annular extension part; 4. Annular groove; 5. Annular fixing part; 51. Fixing part; 52. Locking hole; 6. Locking part; 61. Threaded section. DETAILED DESCRIPTION

[0029] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 3 As shown, this embodiment discloses a reduction motor, including a motor housing 1 and a reduction box housing 2, wherein the reduction box housing 2 is provided with a worm wheel placement chamber 23 and a worm placement chamber 22 for placing a worm wheel and a worm. The motor housing 1 is provided with an axial opening, and the reduction box housing 2 is provided with a connecting portion 24 connected to the opening of the motor housing 1, and the motor housing 1 and the connecting portion 24 of the reduction box housing 2 are fixedly connected by a locking member 6. The connecting portion 24 of the reduction box housing is provided with four annular reinforcing ribs 25 evenly spaced, and the reinforcing ribs 25 extend in the radial direction.

[0031] like Figures 2 to 5 as well as Figure 7As shown, the outer diameter of the connecting portion 24 is the same as the outer diameter of the motor housing 1. Two through holes 21 are arranged at the circumferential outer edge of the reduction gearbox housing 2, which are evenly spaced and penetrate in the axial direction. The inner wall of the upper end of the motor housing 1 is provided with an annular groove 4 opening radially inward, and the annular groove 4 is axially closed. An annular fixing member 5 is detachably fixed in the annular groove 4. The annular fixing member 5 is annular and elastic; the annular fixing member 5 is partially embedded in the annular groove 4, and the radial width of the annular fixing member 5 is greater than the radial depth of the annular groove 4. There is a tendency to expand circumferentially outward in the annular groove 4. The two axial end faces and the circumferential outer wall of the annular fixing member 5 are in contact with the groove wall of the annular groove 4; the annular fixing member 5 has an opening that can make the annular fixing member shrink circumferentially, and the annular fixing member 5 is provided with two fixing portions 51 extending radially inward, and the fixing portion 51 is provided with a locking hole 52 penetrating axially, and the locking hole 52 corresponds to the through hole 21 one by one. The locking member 6 is a bolt, and the diameter of the threaded section 61 of the locking member 6 is smaller than the aperture of the through hole 21. The annular fixing member 5 can be a conventional elastic retaining ring.

[0032] like Figure 2 , Figure 3 and Figure 6 As shown, an annular extension portion 3 extending axially toward the motor housing 1 is provided at the circumferential inner edge of the end surface of the connection portion 24 facing the motor housing 1 , and the circumferential outer wall of the annular extension portion 3 is in contact with the circumferential inner wall of the motor housing 1 .

[0033] When fixing the motor and the reduction box, the operator compresses the annular fixing member 5 so that the annular fixing member 5 can smoothly enter the opening of the motor housing 1, and the annular fixing member 5 is clamped into the annular groove 4. Then, the annular extension 3 of the reduction box housing 2 is extended into the opening of the motor housing 1, so that the circumferential outer wall of the annular extension 3 is in contact with the circumferential inner wall of the motor housing 1, and then the locking member 6 is passed through the through hole 21, and the reduction box housing 2 is rotated so that the threaded section 61 of the locking member 6 can be aligned with the locking hole 52, and then the angle of the locking member 6 is adjusted and the locking member 6 is screwed so that the locking member 6 is threadedly matched with the locking hole 52, thereby completing the installation of the motor and the reduction box.

Claims

1. A reduction motor, comprising a motor housing and a reduction box body, wherein the motor housing is axially opened, and the reduction box body comprises a connecting portion connected to the opening of the motor housing, characterized in that: At least two through holes penetrating axially for the locking piece to pass through are provided at the circumferential outer edge of the connecting portion, an annular groove opening radially inward is provided on the inner wall of the motor housing, the annular groove is axially closed, an annular fixing piece is embedded in the annular groove, the annular fixing piece has an opening that enables the annular fixing piece to shrink circumferentially, the annular fixing piece is provided with at least two fixing portions extending radially inwardly, the fixing portions are provided with locking holes with axial openings corresponding one to one with the through holes, the locking piece passes through the through holes and is threadedly engaged with the locking holes.

2. The reduction motor according to claim 1, characterized in that: The annular fixing piece is elastic and has a tendency to expand outward in the circumferential direction in the annular fixing groove.

3. The reduction motor according to claim 2, characterized in that: The annular fixing member is partially embedded in the annular groove, and the radial width of the annular fixing member is greater than the radial depth of the annular groove.

4. The reduction motor according to claim 1, 2 or 3, characterized in that: The connecting portion is provided with a plurality of radially extending reinforcing ribs.

5. The reduction motor according to claim 1, 2 or 3, characterized in that: The locking member is a bolt, and the diameter of the through hole is larger than the diameter of the threaded section of the bolt.

6. The reduction motor according to claim 1, 2 or 3, characterized in that: An annular extension portion extending axially toward the motor housing is provided at the circumferential inner edge of the end surface of the connection portion of the reduction gear box body facing the motor housing, and the circumferential outer wall of the annular extension portion contacts and cooperates with the circumferential inner wall of the motor housing.

7. The reduction motor according to claim 1, 2 or 3, characterized in that: The outer diameter of the connecting portion is the same as the outer diameter of the opening of the motor housing.

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