Gear motor

Abstract

The invention relates to the technical field of gear motors, and particularly discloses a gear motor which comprises an outer shell, a speed reducer, a motor assembly and a sealing element, a mounting cavity is formed in the outer shell, a mounting hole communicated with the mounting cavity is formed in one end of the outer shell, and the speed reducer comprises a reduction gearbox, a bearing and a reduction gear. The speed reducer is installed in the installation cavity, the motor assembly is installed in the installation cavity and comprises a motor body and a motor shaft, the motor shaft is installed on the motor body, the motor shaft penetrates through the speed reducer and extends out of the installation hole, the motor shaft is sleeved with the sealing piece, the sealing piece is arranged between the bearing and the inner wall of the outer shell, and the sealing piece is at least made of elastic materials in the axial direction. The bearing presses the sealing element in the axial direction of the motor shaft and seals the sealing element on the inner side edge of the mounting hole, and the sealing element is coaxial with the motor shaft on the premise of ensuring the sealing performance of the sealing element, so that the abrasion of the sealing element is reduced.

Description

Technical Field

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

[0002] At present, the seal on the side of the reduction motor close to its own output shaft is usually directly installed on the outer shell, and then the output shaft passes through the bearing and the seal in sequence and extends out of the outer shell. Due to errors in the installation process of the seal, it is difficult to ensure the coaxiality between the seal and the bearing after installation, resulting in the seal and the output shaft being not coaxial, which in turn causes eccentric wear of the seal. Summary of the invention

[0003] The main purpose of the present invention is to provide a reduction motor, aiming to solve the problem that the seal on one side close to the output shaft of the existing reduction motor is not coaxial with the output shaft after installation, thereby causing eccentric wear of the seal.

[0004] In order to solve the above problems, the present invention provides a reduction motor, comprising:

[0005] An outer shell, wherein a mounting cavity is formed inside the outer shell, and a mounting hole communicating with the mounting cavity is formed at one end of the outer shell;

[0006] A reducer, the reducer comprising a reduction box, a bearing and a reduction gear, the reduction box being installed in the installation cavity, and the bearing and the reduction gear being sequentially arranged in the reduction box in a direction away from the installation hole;

[0007] a motor assembly, the motor assembly being installed in the installation cavity and being located at an end of the reducer away from the installation hole, the motor assembly comprising a motor body and a motor shaft, the motor shaft being installed on the motor body, the motor shaft passing through the reducer and extending out of the installation hole; and

[0008] A seal, which is sleeved on the motor shaft and arranged between the bearing and the inner edge of the mounting hole. The seal can be elastically deformed at least in the axial and circumferential directions. The bearing and the inner edge of the mounting hole press the seal along the axial direction of the motor shaft and seal it to the motor shaft.

[0009] In one embodiment, the seal includes a mounting portion, a first sealing lip is provided on the inner circumferential side of the mounting portion, one end of the mounting portion is axially abutted against the inner edge of the mounting hole, the bearing is axially pressed against the other end of the mounting portion, and the first sealing lip is pressed against and sealed on the motor shaft.

[0010] In one embodiment, the seal also includes a first extension portion, which is axially connected to the periphery of the mounting portion along the motor shaft, the inner wall of the outer shell is provided with a first mounting groove, the bottom of the first mounting groove is provided with the mounting hole, one end of the mounting portion abuts against the bottom wall of the first mounting groove, the first extension portion is inserted into the mounting hole, the opening area of ​​the first extension portion perpendicular to the axial direction of the motor shaft gradually decreases along the extending direction of the motor shaft, and the inner peripheral side of the first extension portion away from one end of the mounting portion is provided with a second sealing lip, and the second sealing lip abuts against the motor shaft.

[0011] In one embodiment, a convex rib is circumferentially provided on one side of the mounting portion facing the bottom wall of the first mounting groove, the convex rib and the first extension portion are spaced apart in the radial direction of the motor shaft, and the convex rib abuts against the bottom wall of the first mounting groove.

[0012] In one embodiment, the sealing member includes a reinforcement member, and the reinforcement member includes a first reinforcement portion and a second reinforcement portion that are vertically connected, the first reinforcement portion is arranged in an annular manner inside the mounting portion, and the second reinforcement portion is arranged in an annular manner inside the first extension portion.

[0013] In one embodiment, the reduction motor includes a sealing bracket, one end of the sealing bracket abuts against the mounting portion, and the other end of the sealing bracket abuts against the reduction box.

[0014] In one embodiment, the outer shell includes a shell body and a sealing cover, which enclose the installation cavity, and the shell body is provided with the installation hole, and a connection port is opened at one end away from the installation hole;

[0015] The sealing cover comprises an inserting portion and a covering portion which are connected to each other. The inserting portion is inserted into the connecting port, and the covering portion covers an end of the shell body away from the mounting hole.

[0016] In one embodiment, the reduction motor includes a first sealing ring, the insertion portion is circumferentially provided with a second mounting groove, and the first sealing ring is mounted in the second mounting groove and abuts against the inner wall of the housing body.

[0017] In one embodiment, a second extension portion is further provided on a side of the sealing cover away from the shell body, a sealing groove is provided on a side of the second extension portion away from the sealing cover, a through hole is provided at the bottom of the sealing groove, and sealant is filled in the sealing groove. The sealant is used to seal the lead wire passing through the through hole, and one end of the lead wire inside the outer shell is connected to the motor body.

[0018] In one embodiment, the reduction motor includes a second sealing ring, and threaded holes are provided at one end of the outer shell near the mounting hole and the reduction box, and are connected by screws, and the second sealing ring is arranged in the circumferential gap between the screw and the threaded hole of the outer shell.

[0019] The present invention provides a reduction motor, including an outer shell, a reducer, a motor assembly and a seal. When the seal is installed, the seal is firstly sleeved on the motor shaft of the motor assembly to ensure that the seal is coaxial with the bearing of the reducer, and then the seal is coaxial with the motor shaft. After the installation is completed, the seal is axially compressed to be pressed on the inner edge of the mounting hole of the outer shell to achieve sealing. The seal achieves coaxiality with the motor shaft while ensuring its own sealing, thereby reducing its own wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment of a reduction motor of the present invention;

[0022] Figure 2 for Figure 1 Cross-sectional view of the medium reduction motor;

[0023] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0024] Figure 4 for Figure 1 Schematic diagram of the structure of the seal in the reduction motor;

[0025] Figure 5 for Figure 4 a cross-sectional view of a seal;

[0026] Figure 6 for Figure 1 Schematic diagram of the explosion of the first sealing ring, the sealing cover, the second extension part and the sealant in the embodiment.

[0027] Description of Figure Numbers:

[0028] 10. Outer shell; 11. Shell body; 111. Mounting cavity; 112. Mounting hole; 1121. First mounting groove; 12. Sealing cover; 121. Insertion part; 1211. Second mounting groove; 122. Covering part; 13. Second extension part; 131. Sealing groove; 132. Sealant; 20. Speed ​​reducer; 21. Speed ​​reducer box; 22. Bearing; 23. Speed ​​reduction gear; 30. Motor assembly; 31. Motor body; 32. Motor shaft; 40. Sealing member; 41. Mounting part; 411. First sealing lip; 412. Raised rib; 42. First extension part; 421. Second sealing lip; 43. Reinforcement member; 431. First reinforcement part; 432. Second reinforcement part; 50. Sealing bracket; 60. First sealing ring; 70. Lead wire.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting 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 invention.

[0033] At present, the seal on the side of the reduction motor close to its own output shaft is usually directly installed on the outer shell, and then the output shaft passes through the bearing and the seal in sequence and extends out of the outer shell. Due to errors in the installation process of the seal, it is difficult to ensure the coaxiality between the seal and the bearing after installation, resulting in the seal and the output shaft being not coaxial, which in turn causes eccentric wear of the seal.

[0034] In order to solve the above problems, the present invention proposes a reduction motor, aiming to solve the problem that the seal on the side close to the output shaft of the existing reduction motor is not coaxial with the output shaft after installation, thereby causing eccentric wear of the seal.

[0035] like Figures 1 to 4 In one embodiment, the reduction motor includes an outer shell 10, a reducer 20, a motor assembly 30 and a seal 40. An installation cavity 111 is formed inside the outer shell 10. An installation hole 112 communicating with the installation cavity 111 is opened at one end of the outer shell 10. The reducer 20 includes a reduction box 21, a bearing 22 and a reduction gear 23. The reduction box 21 is installed in the installation cavity 111. The bearing 22 and the reduction gear 23 are sequentially arranged inside the reduction box 21 in a direction away from the installation hole 112. The motor assembly 30 is installed in the installation cavity 111. The motor assembly 30 includes a motor body 31 and a motor shaft 32. The motor shaft 32 is mounted on the motor body 31. The motor shaft 32 passes through the reducer 20 and extends out of the mounting hole 112. The seal 40 is sleeved on the motor shaft 32 and is arranged between the bearing 22 and the inner edge of the mounting hole 112. The seal 40 can be elastically deformed at least in the axial and circumferential directions. The bearing 22 and the inner edge of the mounting hole 112 press the seal 40 along the axial direction of the motor shaft 32 and seal it to the motor shaft 32.

[0036] In this embodiment, the outer shell 10 is made of plastic to ensure its own corrosion resistance. At the same time, the outer shell 10 made of plastic can greatly reduce the production cost, and it is easy to carry out mold mass production. The inner part of the outer shell 10 is hollow, forming an installation cavity 111, and the installation cavity 111 is used to provide installation space for other components of the reduction motor. The outer peripheral side of the outer shell 10 is fully enclosed to improve the protection performance of the outer shell 10 itself. The reducer 20 is installed in the installation cavity 111. The reducer 20 includes a reduction box 21, a bearing 22 and a reduction gear 23, wherein the bearing 22 is embedded in one end of the reduction box 21, and the reduction gear 23 is installed in the reduction box 21. The motor assembly 30 includes a motor body 31 and a motor shaft 32, wherein the motor body 31 is installed in the installation cavity 111, one end of the motor shaft 32 is installed in the motor body 31, and the other end passes through the bearing 22 and the installation hole 112 of the outer shell 10 to extend out of the outer shell 10 for connection with other components. The initial installation method of the seal 40 is to put it on the motor shaft 32, and then axially compress it so that it is pressed onto the inner edge of the mounting hole 112, thereby achieving sealing of the mounting hole 112 and between the mounting hole 112 and the motor shaft 32. Since the motor shaft 32 needs to pass through the bearing 22 during installation, the motor shaft 32 and the bearing 22 are coaxially arranged. The installation method of putting the seal 40 on the sealing shaft can ensure that the seal 40, the motor shaft 32 and the bearing 22 are coaxially arranged. After ensuring the coaxiality of the three, the seal 40 is pressed onto the inner edge of the mounting hole 112 to achieve the sealing effect. The above-mentioned installation method can ensure that the seal 40 is coaxial with the motor shaft 32 when the motor shaft 32 rotates, thereby greatly reducing the eccentric wear of the seal 40 caused by the non-coaxiality with the motor shaft 32. At the same time, the axial part of the seal 40 is made of elastic material, such as rubber, so as to facilitate axial compression to ensure that under the action of axial force, the seal 40 can be pressed by the bearing 22 and tightly sealed on the inner edge of the mounting hole 112, preventing lubricating oil leakage and external liquid from entering the interior of the reduction motor, thereby improving the sealing performance of the seal 40.

[0037] The present invention provides a reduction motor, including an outer shell 10, a reducer 20, a motor assembly 30 and a seal 40. When installing the seal 40, firstly, the seal 40 is sleeved on the motor shaft 32 of the motor assembly 30 to ensure that the seal 40 is coaxial with the bearing 22 of the reducer 20, and then ensure that the seal 40 is coaxial with the motor shaft 32. After the installation is completed, the seal 40 is axially compressed to press the seal 40 onto the inner edge of the mounting hole 112 of the outer shell 10 to achieve sealing. The seal 40 ensures its own coaxiality with the motor shaft 32 while ensuring its own sealing, thereby reducing its own wear.

[0038] like Figure 3 and Figure 4 In one embodiment, the seal 40 includes a mounting portion 41, and a first sealing lip 411 is provided on the inner circumferential side of the mounting portion 41. One end of the mounting portion 41 axially abuts against the inner edge of the mounting hole 112, and the bearing 22 axially presses against the other end of the mounting portion 41, and the first sealing lip 411 presses against and seals the motor shaft 32.

[0039] In this embodiment, the seal 40 includes a mounting portion 41, the inner diameter of which matches the outer diameter of the motor shaft 32 to ensure that it can be firmly mounted on the motor shaft 32 and can remain stable under the action of axial force. The first sealing lip 411 is arranged on the inner circumference of the mounting portion 41 and abuts against the motor shaft 32. When the mounting portion 41 is axially compressed, the mounting portion 41 will produce elastic deformation under the action of the axial force. At this time, the first sealing lip 411 will be further pressed against the motor shaft 32, and the surface of the motor shaft 32 will form a close contact, thereby preventing the leakage of lubricating oil and the intrusion of external impurities, forming an effective sealing barrier.

[0040] like Figure 3 and Figure 4 In one embodiment, the sealing member 40 further comprises a first extension portion 42, the first extension portion 42 being connected to the periphery of the mounting portion 41 along the axial direction of the motor shaft 32, a first mounting groove 1121 being provided on the inner wall of the outer shell 10, a mounting hole 112 being provided at the bottom of the first mounting groove 1121, one end of the mounting portion 41 being abutted against the bottom wall of the first mounting groove 1121, the first extension portion 42 being inserted into the mounting hole 112, an opening area of ​​the first extension portion 42 perpendicular to the axial direction of the motor shaft 32 gradually decreasing along the extending direction of the motor shaft 32, a second sealing lip 421 being provided on the inner peripheral side of the first extension portion 42 away from one end of the mounting portion 41, the second sealing lip 421 being abutted against the motor shaft 32.

[0041] In this embodiment, the sealing member 40 further includes a first extension portion 42 extending along the axial direction of the motor shaft 32 and connected to the mounting portion 41. The first extension portion 42 is connected to the side of the mounting portion 41 away from the mounting cavity 111. The connection between the two is an integrated design to ensure the seal between the two. The material of the first extension portion 42 can be rubber to ensure its own corrosion resistance; at the same time, it can produce a certain deformation to ensure that it has good sealing performance under different working conditions.

[0042] The first extension portion 42 is inserted into the mounting hole 112, thereby further improving the sealing effect of the seal 40 on the protruding portion of the motor shaft 32. A first mounting groove 1121 is circumferentially opened at one end of the mounting hole 112 close to the inside of the mounting cavity 111. The mounting portion 41 abuts against the bottom wall of the first mounting groove 1121. The design of the first mounting groove 1121 provides a precise mounting position for the mounting portion 41, further improving the sealing performance of the mounting portion 41. At the same time, the opening area of ​​the first extension portion 42 gradually decreases along the extending direction of the motor shaft 32, so that there is a certain gap between the first extension portion 42 and the motor shaft 32 in the axial direction. Such a design helps to minimize the impact of the axial force on the first extension portion 42 when the mounting portion 41 is compressed by the axial force, and ensures that the end of the first extension portion 42 is always tightly attached to the motor shaft 32, thereby further improving the sealing effect of the first extension portion 42; at the same time, a second sealing lip 421 is provided on the inner circumferential side of the end of the first extension portion 42. The setting of the second sealing lip 421 further ensures the sealing between the motor shaft 32 and the outer shell 10, especially for the part of the motor shaft 32 extending out of the mounting hole 112. Since the second sealing lip 421 is located at the end of the first extension portion 42 and has a smaller opening area, it can be tightly attached to the motor shaft 32, thereby achieving close contact with the motor shaft 32 to prevent lubricating oil leakage and external liquid intrusion.

[0043] like Figure 3 and Figure 4 In one embodiment, a convex rib 412 is circumferentially provided on one side of the mounting portion 41 facing the bottom wall of the first mounting groove 1121 , the convex rib 412 and the first extension portion 42 are spaced apart in the radial direction of the motor shaft 32 , and the convex rib 412 abuts against the bottom wall of the first mounting groove 1121 .

[0044] In this embodiment, a convex rib 412 is additionally provided on one side of the bottom wall of the first mounting groove 1121 of the mounting portion 41, and is evenly arranged along the circumference of the mounting portion 41, forming one or more circles of convex structures. The provision of the convex rib 412 increases the friction between the seal 40 and the first mounting groove 1121, so that the seal 40 is not easy to move when subjected to external forces, thereby ensuring the installation stability of the seal 40.

[0045] At the same time, there is a certain gap between the rib 412 and the first extension portion 42 in the radial direction, ensuring that the rib 412 has a certain deformation space in the radial direction when compressed, preventing stress concentration caused by limited deformation, thereby reducing the risk of damage to the rib 412 or the seal 40.

[0046] like Figures 3 to 5In one embodiment, the seal 40 includes a reinforcement member 43 , which includes a first reinforcement portion 431 and a second reinforcement portion 432 that are vertically connected. The first reinforcement portion 431 is arranged inside the mounting portion 41 , and the second reinforcement portion 432 is arranged inside the first extension portion 42 .

[0047] In this embodiment, the material of the reinforcement 43 can be stainless steel or other metals to ensure its own strength. The first reinforcement part 431 and the second reinforcement part 432 are made of an integrated design to improve the structural strength and installation stability of the reinforcement 43 itself. The first reinforcement part 431 and the second reinforcement part 432 are both annularly arranged and respectively arranged inside the mounting part 41 and the first extension part 42 to improve the installation strength of the mounting part 41 and the first extension part 42, thereby improving the overall strength of the seal 40, making it more stable when subjected to pressure and vibration; at the same time, the presence of the reinforcement 43 helps to prevent the seal 40 from deforming under high pressure or high vibration environment, thereby improving the sealing effect of the seal 40.

[0048] like Figures 1 to 3 In one embodiment, the reduction motor includes a sealing bracket 50 , one end of the sealing bracket 50 abuts against the mounting portion 41 , and the other end of the sealing bracket 50 abuts against the reduction box 21 .

[0049] In the present embodiment, due to the size limitation of the seal 40 and the reduction gearbox 21, it is difficult for the bearing 22 to directly press against the seal 40. Therefore, in the present embodiment, a sealing bracket 50 is further provided between the seal 40 and the reduction gearbox 21. The two sides of the sealing bracket 50 are respectively abutted against the seal 40 and the reduction gearbox 21. The setting of the sealing bracket 50 can cooperate with the outer shell 10 to provide axial pre-pressure to the seal 40, thereby improving the sealing performance of the seal 40 and reducing the difficulty of axial sealing of the seal 40.

[0050] like Figures 2 to 6 In one embodiment, the outer shell 10 includes a shell body 11 and a sealing cover 12, which together form a mounting cavity 111. The shell body 11 is provided with a mounting hole 112, and a connecting port is opened at an end away from the mounting hole 112. The sealing cover 12 includes a plug-in portion 121 and a covering portion 122 connected to each other. The plug-in portion 121 is plugged into the connecting port, and the covering portion 122 covers the end of the shell body 11 away from the mounting hole 112.

[0051] In this embodiment, the outer shell 10 includes a shell body 11 and a sealing cover 12, wherein the shell body 11 provides protection for the internal motor assembly 30 and reducer 20 and other components, and the sealing cover 12 includes an insertion portion 121 and a cover portion 122 made of an integrated design, wherein the insertion portion 121 is inserted into the interior of the installation cavity 111 and is located at an end away from the installation hole 112. The setting of the insertion portion 121 can prevent external liquid from entering the interior of the motor, thereby improving the sealing performance of the reduction motor at the installation cavity 111; the sealing cover 12 covers the end of the shell body 11 away from the installation hole 112, and the setting of the cover portion 122 realizes the sealing of the shell body 11, protects the internal components from the influence of the external environment, thereby improving the sealing performance of the outer shell 10. At the same time, the structural design of the shell body 11 and the sealing cover 12 being separately set makes it relatively easy to disassemble and reinstall the sealing cover 12, which is convenient for maintenance and repair of the reduction motor.

[0052] like Figures 2 to 6 In one embodiment, the reduction motor includes a first sealing ring 60 , and the insertion portion 121 is circumferentially provided with a second mounting groove 1211 . The first sealing ring 60 is installed in the second mounting groove 1211 and abuts against the inner wall of the housing body 11 .

[0053] In this embodiment, the reduction motor is also provided with a first sealing ring 60, and a second installation groove 1211 is circumferentially corresponding to the insertion portion 121 to accurately fix the installation position of the first sealing ring 60. The first sealing ring 60 is installed in the second installation groove 1211 and is in close contact with the inner wall of the shell body 11, thereby forming an effective sealing interface; during the operation of the reduction motor, due to vibration or temperature changes, small relative movements may occur between the components, and the first sealing ring 60 can compensate for these movements to ensure the sealing effect of the reduction motor.

[0054] like Figures 2 to 6 In one embodiment, a second extension portion 13 is further provided on a side of the sealing cover 12 away from the shell body 11, a sealing groove 131 is provided on a side of the second extension portion 13 away from the sealing cover 12, a through hole is provided at the bottom of the sealing groove 131, and a sealant 132 is filled in the sealing groove 131, and the sealant 132 is used to seal the lead wire 70 passing through the through hole.

[0055] In this embodiment, a second extension portion 13 is provided on the side of the sealing cover 12 away from the shell body 11. The second extension portion 13 is provided to provide a sealing and protective path for the lead wire 70. At the same time, a sealing groove 131 is provided on the side of the second extension portion 13 away from the sealing cover 12. A through hole is provided at the bottom of the sealing groove 131. The lead wire 70 passes through the through hole to connect with the motor assembly 30. At the same time, the sealant 132 filled in the sealing groove 131 seals the lead wire 70 to protect the cable from environmental factors, thereby improving the overall safety performance of the reduction motor. At the same time, the setting of the sealant 132 can also ensure that the lead wire 70 will not be hard bent when it is bent, causing the lead wire 70 to break, thereby improving the service life of the lead wire 70.

[0056] In one embodiment, the reduction motor includes a second sealing ring (not shown), and threaded holes are provided at one end of the outer shell 10 close to the mounting hole 112 and the reduction box 21, and are connected by screws. The second sealing ring is arranged in the circumferential gap between the screw and the threaded hole of the outer shell 10.

[0057] In this embodiment, the second sealing ring is an annular sealing element and is arranged in the circumferential gap between the screw and the threaded hole of the shell body 11. The setting of the second sealing ring can prevent external liquid from entering the interior of the reduction motor from the connection between the shell body 11 and the reduction box 21, thereby further improving the sealing of the reduction motor; in addition, the second sealing ring can also enhance the stability of the screw connection to a certain extent, reduce the loosening caused by vibration, thereby improving the structural stability of the reduction motor.

[0058] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A reduction motor, characterized in that: The reduction motor comprises: An outer shell, wherein a mounting cavity is formed inside the outer shell, and a mounting hole communicating with the mounting cavity is formed at one end of the outer shell; A reducer, the reducer comprising a reduction box, a bearing and a reduction gear, the reduction box being installed in the installation cavity, and the bearing and the reduction gear being sequentially arranged in the reduction box in a direction away from the installation hole; a motor assembly, the motor assembly being installed in the installation cavity and being located at an end of the reducer away from the installation hole, the motor assembly comprising a motor body and a motor shaft, the motor shaft being installed on the motor body, the motor shaft passing through the reducer and extending out of the installation hole; and A seal, which is sleeved on the motor shaft and arranged between the bearing and the inner edge of the mounting hole. The seal can be elastically deformed at least in the axial and circumferential directions. The bearing and the inner edge of the mounting hole press the seal along the axial direction of the motor shaft and seal it to the motor shaft.

2. The reduction motor according to claim 1, characterized in that: The seal includes a mounting portion, an inner circumferential side of which is provided with a first sealing lip, one end of the mounting portion axially abuts against an inner edge of the mounting hole, the bearing axially presses against the other end of the mounting portion, and causes the first sealing lip to press against and seal against the motor shaft.

3. The reduction motor according to claim 2, characterized in that: The seal also includes a first extension portion, which is axially connected to the periphery of the mounting portion along the motor shaft. A first mounting groove is provided on the inner wall of the outer shell, and the mounting hole is provided at the bottom of the first mounting groove. One end of the mounting portion abuts against the bottom wall of the first mounting groove, and the first extension portion is inserted into the mounting hole. An opening area of ​​the first extension portion perpendicular to the axial direction of the motor shaft gradually decreases along the extending direction of the motor shaft. A second sealing lip is provided on the inner peripheral side of the first extension portion away from one end of the mounting portion, and the second sealing lip abuts against the motor shaft.

4. The reduction motor according to claim 3, characterized in that: A convex rib is circumferentially arranged on one side of the mounting portion facing the bottom wall of the first mounting groove. The convex rib and the first extension portion are spaced apart in the radial direction of the motor shaft, and the convex rib abuts against the bottom wall of the first mounting groove.

5. The reduction motor according to claim 4, characterized in that: The sealing member includes a reinforcing member, and the reinforcing member includes a first reinforcing portion and a second reinforcing portion that are vertically connected. The first reinforcing portion is disposed in an annular manner inside the mounting portion, and the second reinforcing portion is disposed in an annular manner inside the first extending portion.

6. The reduction motor according to any one of claims 1 to 5, characterized in that: The reduction motor comprises a sealing bracket, one end of the sealing bracket abuts against the mounting portion, and the other end of the sealing bracket abuts against the reduction box.

7. The reduction motor according to any one of claims 1 to 5, characterized in that: The outer shell comprises a shell body and a sealing cover, which enclose the installation cavity. The shell body is provided with the installation hole and a connection port is provided at one end away from the installation hole. The sealing cover comprises an inserting portion and a covering portion which are connected to each other. The inserting portion is inserted into the connecting port, and the covering portion covers an end of the shell body away from the mounting hole.

8. The reduction motor according to claim 7, characterized in that: The reduction motor comprises a first sealing ring, the insertion portion is provided with a second mounting groove in a circumferential direction thereof, and the first sealing ring is mounted in the second mounting groove and abuts against the inner wall of the housing body.

9. The reduction motor according to claim 7, characterized in that: A second extension portion is also provided on the side of the sealing cover away from the shell body, a sealing groove is provided on the side of the second extension portion away from the sealing cover, a through hole is provided at the bottom of the sealing groove, and sealant is filled in the sealing groove. The sealant is used to seal the lead wire passing through the through hole, and one end of the lead wire inside the outer shell is connected to the motor body.

10. The reduction motor according to any one of claims 1 to 5, characterized in that: The reduction motor includes a second sealing ring. The end of the outer shell close to the mounting hole and the reduction box are both provided with threaded holes and are connected by screws. The second sealing ring is arranged in the axial gap between the screw and the threaded hole of the outer shell.

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