Gear motor

Abstract

The utility model 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, an installation cavity is formed in the outer shell, one end of the outer shell is provided with an installation hole communicated with the installation cavity, 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 utility model relates to a reduction motor technical field especially relates to a reduction motor. BACKGROUND

[0002] At present, the sealing piece close to the output shaft of the reduction motor is usually directly installed on the outer shell, and then the output shaft passes through the bearing and the sealing piece in turn and extends out of the outer shell. Since there is an error in the installation process of the sealing piece, it is difficult to ensure the coaxiality between the sealing piece and the bearing after installation, which leads to the eccentric wear of the sealing piece and the output shaft. SUMMARY

[0003] The main purpose of the utility model is to provide a reduction motor, which aims to solve the problem that the sealing piece 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 sealing piece itself.

[0004] To solve the above problems, the utility model provides a reduction motor, which comprises:

[0005] An outer shell is formed with an installation cavity inside, and an installation hole is formed in one end of the outer shell and communicates with the installation cavity;

[0006] A reducer comprises a reduction box, a bearing and a reduction gear, the reduction box is installed in the installation cavity, and the bearing and the reduction gear are sequentially arranged in the reduction box away from the installation hole;

[0007] A motor assembly is installed in the installation cavity and located at one end of the reducer away from the installation hole, the motor assembly comprises a motor body and a motor shaft, the motor shaft is installed in the motor body, and the motor shaft passes through the reducer and extends out of the installation hole; and

[0008] A sealing piece is sleeved on the motor shaft and arranged between the bearing and the inner side edge of the installation hole, the sealing piece is elastically deformed at least in the axial and circumferential directions, and the bearing and the inner side edge of the installation hole press and seal the sealing piece along the axial direction of the motor shaft.

[0009] In an embodiment, the sealing piece comprises an installation portion, a first sealing lip is arranged on the inner circumferential side of the installation portion, one end of the installation portion is axially abutted against the inner side edge of the installation hole, and the bearing is axially abutted against the other end of the installation portion and makes the first sealing lip abut and seal the motor shaft.

[0010] In an embodiment, the seal further comprises a first extension portion connected to the periphery of the mounting portion in the axial direction of the motor shaft, the inner wall of the outer housing 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 in the extension direction of the motor shaft, the inner periphery of the end of the first extension portion away from the mounting portion is provided with a second sealing lip, and the second sealing lip abuts against the motor shaft.

[0011] In an embodiment, the mounting portion is provided with a protruding rib on one side of the bottom wall of the first mounting groove in the circumferential direction, the protruding rib is arranged in the radial direction of the motor shaft and spaced apart from the first extension portion, and the protruding rib abuts against the bottom wall of the first mounting groove.

[0012] In an embodiment, the seal comprises a reinforcing member, the reinforcing member comprises a first reinforcing portion and a second reinforcing portion connected perpendicularly, the first reinforcing portion is arranged in the inner portion of the mounting portion, and the second reinforcing portion is arranged in the inner portion of the first extension portion.

[0013] In an embodiment, the speed reduction motor comprises a sealing support, one end of the sealing support abuts against the mounting portion, and the other end of the sealing support abuts against the speed reduction box.

[0014] In an embodiment, the outer housing comprises a housing body and a sealing cover, the housing body and the sealing cover enclose the mounting cavity, the housing body is provided with the mounting hole and is provided with a connecting port at the end away from the mounting hole;

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

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

[0017] In an embodiment, the sealing cover is further provided with a second extension portion away from the housing body, the second extension portion is provided with a sealing groove on the side away from the sealing cover, the bottom of the sealing groove is provided with a through hole, the sealing groove is filled with sealing glue, the sealing glue is used to seal the lead-out wire passing through the through hole, and one end of the lead-out wire inside the outer housing is connected to the motor body.

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

[0019] The utility model provides a kind of speed reduction motor, including outer shell, speed reducer, motor assembly and sealing element, when sealing element is installed, first sealing element is sleeved on the motor shaft of motor assembly, it is guaranteed that sealing element and the bearing of speed reducer are coaxial, to guarantee sealing element and motor shaft are coaxial, after installation is completed, the sealing element is compressed axially again, so that it is pressed and mounted in the inner side edge of the mounting hole of outer shell and realizes sealing.The sealing element realizes itself and motor shaft coaxial under the premise of guaranteeing its own sealing, to reduce its wear and tear. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0021] Figure 1 It is the structural schematic diagram of an embodiment of the speed reduction motor of the utility model;

[0022] Figure 2 It is Figure 1 The sectional view of speed reduction motor in it;

[0023] Figure 3 It is Figure 2 The structure enlarged view of A in it;

[0024] Figure 4 It is Figure 1 The structural schematic diagram of sealing element in speed reduction motor;

[0025] Figure 5 It is Figure 4 The sectional view of sealing element;

[0026] Figure 6 It is Figure 1 The explosion schematic view of embodiment first sealing ring, sealing cover, second extension and sealing glue in it.

[0027] EXPLANATION OF DRAWINGS:

[0028] 10, outer shell; 11, shell body; 111, mounting cavity; 112, mounting hole; 1121, first mounting groove; 12, sealing cover; 121, plug-in part; 1211, second mounting groove; 122, cover part; 13, second extension part; 131, sealing groove; 132, sealing glue; 20, speed reducer; 21, speed reduction box; 22, bearing; 23, speed reduction gear; 30, motor assembly; 31, motor body; 32, motor shaft; 40, sealing element; 41, mounting part; 411, first sealing lip; 412, protruding rib; 42, first extension part; 421, second sealing lip; 43, reinforcing element; 431, first reinforcing part; 432, second reinforcing part; 50, sealing support; 60, first sealing ring; 70, lead wire.

[0029] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

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

[0032] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of the various embodiments can be combined with each other, but must be based on the realization of the ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0033] The seal near the output shaft of the current reduction motor is usually directly installed on the outer shell, and then the output shaft extends out of the shell through the bearing and the seal. Due to the installation error of the seal, it is difficult to ensure the coaxiality between the seal and the bearing after installation, which leads to the eccentric wear of the seal.

[0034] To solve the above problems, the utility model provides a kind of reduction motor, to solve the eccentric wear of the seal near the output shaft of the current reduction motor, thereby causing the problem of itself.

[0035] As Figures 1 to 4 In an embodiment, the reduction motor includes an outer shell 10, a reducer 20, a motor assembly 30 and a seal 40, the outer shell 10 is formed with an installation cavity 111 inside, the outer shell 10 is provided with an installation hole 112 communicated with the installation cavity 111 at one end, 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 away from the installation hole 112, the motor assembly 30 is installed in the installation cavity 111 and located away from the installation hole 112 of the reducer 20, the motor assembly 30 includes a motor body 31 and a motor shaft 32, the motor shaft 32 is installed in the motor body 31, the motor shaft 32 passes through the reducer 20 and extends out of the installation hole 112, the seal 40 is sleeved on the motor shaft 32 and located between the bearing 22 and the inner side edge of the installation hole 112, the seal 40 is elastically deformed at least in the axial and circumferential directions, the bearing 22 and the inner side edge of the installation hole 112 press and seal the seal 40 on the motor shaft 32 along the axial direction of the motor shaft 32.

[0036] In this embodiment, the outer shell 10 is made of plastic to ensure its corrosion resistance. At the same time, using plastic to make the outer shell 10 can significantly reduce production costs, making it easy to mold and mass-produce. The interior of the outer shell 10 is hollow, forming a mounting cavity 111. The mounting cavity 111 is used to provide mounting space for other components of the reduction motor. The outer periphery of the outer shell 10 is fully enclosed to improve the protective performance of the outer shell 10 itself. The reducer 20 is installed in the mounting 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 interior of 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 mounting cavity 111. One end of the motor shaft 32 is mounted on the motor body 31, and the other end extends out of the outer shell 10 through the bearing 22 and the mounting hole 112 of the outer shell 10 to connect with other components. The initial installation method of the seal 40 is to put it on the motor shaft 32, and then compress it axially 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 into place 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 comprising an outer shell 10, a reducer 20, a motor assembly 30, and a seal 40. When installing the seal 40, the seal 40 is first fitted onto the motor shaft 32 of the motor assembly 30, ensuring that the seal 40 is coaxial with the bearing 22 of the reducer 20, and thus with the motor shaft 32. After installation, the seal 40 is axially compressed, press-fitting the seal 40 onto the inner edge of the mounting hole 112 of the outer shell 10 to achieve sealing. The seal 40 ensures coaxiality with the motor shaft 32 while maintaining its own sealing properties, thereby reducing wear on the seal 40.

[0038] likeFigure 3 And Figure 4 In an embodiment, the sealing member 40 comprises a mounting portion 41, the inner circumferential side of the mounting portion 41 is provided with a first sealing lip 411, one end of the mounting portion 41 axially abuts the inner side edge of the mounting hole 112, the bearing 22 axially abuts the other end of the mounting portion 41, and the first sealing lip 411 abuts and seals the motor shaft 32.

[0039] In this embodiment, the sealing member 40 comprises a mounting portion 41, the inner diameter size of the mounting portion 41 matches the outer diameter size of the motor shaft 32 to ensure that it can be firmly mounted on the motor shaft 32 and can be stable under the action of axial force, the first sealing lip 411 is annularly arranged on the inner circumferential side of the mounting portion 41 and abuts the motor shaft 32, when the mounting portion 41 is axially compressed, the mounting portion 41 will elastically deform under the action of axial force, at this time the first sealing lip 411 will be further compressed on the motor shaft 32, the surface of the motor shaft 32 forms a close contact, thereby preventing the leakage of lubricating oil and the intrusion of external impurities, forming an effective sealing barrier.

[0040] As Figure 3 And Figure 4 In an embodiment, the sealing member 40 further comprises a first extension portion 42, the first extension portion 42 is axially connected to the peripheral edge of the mounting portion 41 along the motor shaft 32, the inner wall of the housing 10 is provided with a first mounting groove 1121, the groove bottom of the first mounting groove 1121 is provided with a mounting hole 112, one end of the mounting portion 41 abuts the groove bottom wall of the first mounting groove 1121, the first extension portion 42 is inserted into the mounting hole 112, the opening area of the first extension portion 42 perpendicular to the axial direction of the motor shaft 32 gradually decreases along the extension direction of the motor shaft 32, the inner circumferential side of the one end of the first extension portion 42 away from the mounting portion 41 is provided with a second sealing lip 421, the second sealing lip 421 abuts the motor shaft 32.

[0041] In this embodiment, the sealing member 40 further comprises 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, and the connection between the two is designed as an integrated design to ensure the sealing between the two. The material of the first extension portion 42 can be rubber to ensure its corrosion resistance; at the same time, it can deform to ensure that it has good sealing performance under different working conditions.

[0042] The first extension part 42 is inserted into the mounting hole 112, thereby further improving the sealing effect of the sealing member 40 on the protruding part of the motor shaft 32. The mounting hole 112 is provided with a first mounting groove 1121 on the side close to the inner end of the mounting cavity 111. The mounting part 41 abuts against the groove bottom wall of the first mounting groove 1121. The first mounting groove 1121 provides a precise mounting position for the mounting part 41, thereby further improving the sealing performance of the mounting part 41. Meanwhile, the opening area of the first extension part 42 gradually decreases along the protruding direction of the motor shaft 32, so that the first extension part 42 has a certain gap with the motor shaft 32 in the axial direction. Such a design helps to minimize the influence of the axial force on the first extension part 42 when the mounting part 41 is compressed by the axial force, thereby ensuring that the end of the first extension part 42 always closely adheres to the motor shaft 32, and further improving the sealing effect of the first extension part 42. Meanwhile, the inner circumferential side of the end of the first extension part 42 is provided with a second sealing lip 421. The second sealing lip 421 further ensures the sealing between the motor shaft 32 and the outer housing 10, especially for the part of the motor shaft 32 protruding out of the mounting hole 112. Since the second sealing lip 421 is located at the end of the first extension part 42, the opening area thereof is small, so the second sealing lip 421 can closely adhere to the motor shaft 32 to achieve close contact with the motor shaft 32, thereby preventing leakage of lubricating oil and intrusion of external liquid.

[0043] As Figure 3 and Figure 4 In an embodiment, the mounting part 41 is circumferentially provided with a protruding rib 412 on the side close to the groove bottom wall of the first mounting groove 1121. The protruding rib 412 is spaced apart from the first extension part 42 in the radial direction of the motor shaft 32, and abuts against the groove bottom wall of the first mounting groove 1121.

[0044] In the present embodiment, the mounting part 41 is additionally provided with the protruding rib 412 on the side close to the groove bottom wall of the first mounting groove 1121, and the protruding rib 412 is uniformly arranged along the circumference of the mounting part 41 to form one or more protruding structures. The arrangement of the protruding rib 412 increases the friction between the sealing member 40 and the first mounting groove 1121, so that the sealing member 40 is not easy to move when subjected to external force, thereby ensuring the installation stability of the sealing member 40.

[0045] Meanwhile, the protruding rib 412 has a certain gap with the first extension part 42 in the radial direction, so that the protruding rib 412 has a certain deformation space in the radial direction when compressed, thereby preventing stress concentration caused by limited deformation, and reducing the risk of damage to the protruding rib 412 or the sealing member 40.

[0046] As Figures 3 to 5In an embodiment, the sealing member 40 comprises a reinforcing member 43, the reinforcing member 43 comprises a first reinforcing part 431 and a second reinforcing part 432 connected vertically, the first reinforcing part 431 is arranged around the inside of the mounting part 41, and the second reinforcing part 432 is arranged around the inside of the first extending part 42.

[0047] In the embodiment, the reinforcing member 43 can be made of stainless steel or other metal to ensure its strength, and the first reinforcing part 431 and the second reinforcing part 432 are integrally designed to improve the structural strength and installation stability of the reinforcing member 43, the first reinforcing part 431 and the second reinforcing part 432 are both arranged in a ring shape and arranged inside the mounting part 41 and the first extending part 42 respectively to improve the installation strength of the mounting part 41 and the first extending part 42, thereby improving the overall strength of the sealing member 40 and making it more stable under pressure and vibration; meanwhile, the presence of the reinforcing member 43 helps to prevent the sealing member 40 from deforming in a high-pressure or high-vibration environment, thereby improving the sealing effect of the sealing member 40.

[0048] As shown in FIG. 1, the sealing member 40 comprises a mounting part 41, a first extending part 42 and a second extending part 43, the mounting part 41 is arranged on the outer wall of the outer shell 10, the first extending part 42 is arranged on the mounting part 41 and extends along the axial direction of the outer shell 10, and the second extending part 43 is arranged on the first extending part 42 and extends along the radial direction of the outer shell 10. Figures 1 to 3 In an embodiment, the speed reduction motor comprises a sealing support 50, one end of the sealing support 50 abuts against the mounting part 41, and the other end abuts against the speed reduction box 21.

[0049] In the embodiment, due to the size limitation of the sealing member 40 and the speed reduction box 21, it is difficult for the bearing 22 to directly abut against the sealing member 40, therefore, in the embodiment, a sealing support 50 is arranged between the sealing member 40 and the speed reduction box 21, the sealing support 50 abuts against the sealing member 40 and the speed reduction box 21 on both sides, and the arrangement of the sealing support 50 can provide a pre-pressure to the sealing member 40 in the axial direction of the outer shell 10, thereby improving the sealing performance of the sealing member 40 and reducing the axial sealing difficulty of the sealing member 40.

[0050] As shown in FIG. 1, the sealing member 40 comprises a mounting part 41, a first extending part 42 and a second extending part 43, the mounting part 41 is arranged on the outer wall of the outer shell 10, the first extending part 42 is arranged on the mounting part 41 and extends along the axial direction of the outer shell 10, and the second extending part 43 is arranged on the first extending part 42 and extends along the radial direction of the outer shell 10. Figures 2 to 6 In an embodiment, the outer shell 10 comprises a shell body 11 and a sealing cover 12, the two form an installation cavity 111, the shell body 11 is provided with a mounting hole 112, and a connecting port is arranged at the end away from the mounting hole 112, the sealing cover 12 comprises a plug-in part 121 and a cover part 122 connected together, the plug-in part 121 is plugged into the connecting port, and the cover part 122 covers the end of the shell body 11 away from the mounting hole 112.

[0051] In the embodiment, the outer shell 10 comprises a shell body 11 and a sealing cover 12, wherein the shell body 11 provides protection for the internal motor assembly 30 and the reducer 20 and the like, and the sealing cover 12 comprises an insertion part 121 and a cover part 122 which are integrally designed, the insertion part 121 is inserted into the inside of the installation cavity 111 and is located at the end away from the installation hole 112, the insertion part 121 is arranged to prevent external liquid from entering the inside of the motor, thereby improving the sealing performance of the reduction motor at the installation cavity 111; the sealing cover 12 is covered at the end of the shell body 11 away from the installation hole 112, and the cover part 122 is arranged to seal the shell body 11, thereby protecting the internal components from the external environment, and improving the sealing performance of the outer shell 10. At the same time, the separate arrangement of the shell body 11 and the sealing cover 12 makes the sealing cover 12 relatively easy to disassemble and reassemble, thereby facilitating the maintenance and repair of the reduction motor.

[0052] As Figures 2 to 6 In an embodiment, the reduction motor comprises a first sealing ring 60, and the insertion part 121 is correspondingly provided with a second installation groove 1211 in the circumferential direction, and the first sealing ring 60 is installed in the second installation groove 1211 and abuts against the inner wall of the shell body 11.

[0053] In the embodiment, the reduction motor is further provided with the first sealing ring 60, the insertion part 121 is correspondingly provided with the second installation groove 1211 in the circumferential direction to accurately fix the installation position of the first sealing ring 60, and the first sealing ring 60 is installed in the second installation groove 1211 and tightly contacts 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 change, there may be a small relative movement between components, and the first sealing ring 60 can compensate for these movements to ensure the sealing effect of the reduction motor.

[0054] As Figures 2 to 6 In an embodiment, the side of the sealing cover 12 away from the shell body 11 is further provided with a second extension part 13, the side of the second extension part 13 away from the sealing cover 12 is provided with a sealing groove 131, the groove bottom of the sealing groove 131 is provided with a through hole, and the sealing groove 131 is filled with sealing glue 132, and the sealing glue 132 is used to seal the lead-out wire 70 passing through the through hole.

[0055] In the embodiment, the second extension part 13 is arranged on the side of the sealing cover 12 away from the shell body 11, and provides a path for the sealing and protection of the lead-out wire 70.

[0056] In an embodiment, the reduction motor comprises a second sealing ring (not shown), the outer shell 10 and the reduction box 21 are both provided with threaded holes near the mounting hole 112, 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 10.

[0057] In the embodiment, the second sealing ring is an annular sealing element arranged in the circumferential gap between the screw and the threaded hole of the shell body 11, and the arrangement 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 performance of the reduction motor; in addition, the second sealing ring can also enhance the stability of the screw connection to a certain extent, reduce loosening caused by vibration, and thereby improve the structural stability of the reduction motor.

[0058] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application and the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A reduction motor characterized by, The speed reduction motor comprises: an outer housing, which is internally formed with a mounting cavity and has an installation hole at one end thereof and in communication with the mounting cavity; a speed reducer, which comprises a speed reduction box, a bearing and a speed reduction gear, the speed reduction box being mounted in the mounting cavity, the bearing and the speed reduction gear being sequentially arranged in the speed reduction box in a direction away from the installation hole; a motor assembly, which is mounted in the mounting cavity and located at one end of the speed reducer away from the installation hole, the motor assembly comprising a motor body and a motor shaft, the motor shaft being mounted in the motor body and extending through the speed reducer and out of the installation hole; and a sealing member, which is sleeved on the motor shaft and arranged between the bearing and an inner side edge of the installation hole, the sealing member being elastically deformed at least in an axial direction and a circumferential direction, the bearing and the inner side edge of the installation hole pressing and sealing the sealing member on the motor shaft in the axial direction.

2. The reduction gear motor as set forth in claim 1, wherein The sealing member comprises a mounting portion, which is internally provided with a first sealing lip, one end of the mounting portion being axially abutted against the inner side edge of the installation hole, and the bearing being axially abutted against the other end of the mounting portion and making the first sealing lip abut against and seal the motor shaft.

3. The reduction gear motor as set forth in claim 2, wherein The sealing member further comprises a first extension portion, which is axially connected to a circumferential edge of the mounting portion along the motor shaft, an inner wall of the outer housing is provided with a first mounting groove, a groove bottom of the first mounting groove is provided with the installation hole, one end of the mounting portion is abutted against the groove bottom wall of the first mounting groove, the first extension portion is inserted into the installation hole, an opening area of the first extension portion perpendicular to the axial direction of the motor shaft gradually decreases in an extending direction of the motor shaft, an inner circumferential side of one end of the first extension portion away from the mounting portion is provided with a second sealing lip, and the second sealing lip is abutted against the motor shaft.

4. The reduction gear motor as set forth in claim 3, wherein The mounting portion is circumferentially provided with a protruding rib on a side thereof facing the groove bottom wall of the first mounting groove, the protruding rib is arranged in a radial direction of the motor shaft and spaced apart from the first extension portion, and the protruding rib is abutted against the groove bottom wall of the first mounting groove.

5. The reduction gear as set forth in claim 4, characterized in that, The sealing member comprises a reinforcing member, which comprises a first reinforcing portion and a second reinforcing portion connected perpendicularly, the first reinforcing portion is circumferentially arranged in an inner portion of the mounting portion, and the second reinforcing portion is circumferentially arranged in an inner portion of the first extension portion.

6. A reduction gear as claimed in any one of claims 2 to 5, characterized in that The speed reduction motor comprises a sealing support, one end of the sealing support is abutted against the mounting portion, and the other end of the sealing support is abutted against the speed reduction box.

7. The reduction gear as claimed in any one of claims 1 to 5, characterized in that The outer housing comprises a housing body and a sealing cover, which enclose the mounting cavity, the housing body is provided with the installation hole and is provided with a connecting port at one end thereof away from the installation hole; The sealing cover comprises a plug-in portion and a cover portion connected with each other, the plug-in portion is plugged into the connecting port, and the cover portion covers one end of the housing body away from the installation hole.

8. The reduction gear as set forth in claim 7, characterized by The speed reduction motor comprises a first sealing ring, a second mounting groove is circumferentially provided in the plug-in portion in correspondence with the first mounting groove, and the first sealing ring is mounted in the second mounting groove and abutted against an inner wall of the housing body.

9. The reduction gear motor of claim 7, wherein The side of the sealing cover away from the shell body is also provided with a second extension, a sealing groove is formed on the side of the second extension away from the sealing cover, a through hole is formed in the groove bottom of the sealing groove, sealing glue is filled in the sealing groove, and the sealing glue is used for sealing the lead-out wire penetrating through the through hole.

10. The reduction gear as claimed in any one of claims 1 to 5, characterized in that The speed reduction motor comprises a second sealing ring, a threaded hole is formed in one end of the outer shell body close to the mounting hole and in the speed reduction box, and the one end of the outer shell body is connected to the speed reduction box through a screw, and the second sealing ring is arranged in a circumferential gap between the screw and the threaded hole of the outer shell body.

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