Electric drum having built-in closed planetary speed reducer and driven by external electric motor

Abstract

An electric drum having a built-in closed planetary speed reducer and driven by an external electric motor. The electric drum comprises a closed two-stage planetary speed reduction mechanism located in a drum body (4) and an electric motor (12) located outside the drum body, and further comprises a support body, wherein the support body is an integral body which is composed of a drum fixing shaft (1), a secondary gear carrier (22), a primary gear ring (9), a gear ring support seat (252) and an electric motor support shaft (251), and is continuous in the axial direction, without any breaks in the middle. The support body is supported in the drum body and remains stationary during the operation of the drum. The drum fixing shaft fits an output side end cover (2) of the drum body by means of a bearing (23); the primary gear ring is located in a closed two-stage planetary speed reduction mechanism housing and is configured for meshing transmission with a primary planetary gear (16), and the primary gear ring is connected to the secondary gear carrier; and the gear ring support seat is connected to the electric motor support shaft to form a support and connection portion, wherein the support and connection portion is of a hollow structure, two ends of the support and connection portion are connected to the primary gear ring and the electric motor, respectively, and an electric motor output shaft (121) runs through the support and connection portion. The present invention enhances the rigidity of the drum and improves the bearing capacity of an individual drum.

Description

Electric motor roller with built-in closed planetary deceleration and external motor drive TECHNICAL FIELD

[0001] The present application relates to the technical field of electric motor roller, in particular to an electric motor roller with built-in closed planetary deceleration and external motor drive. BACKGROUND

[0002] In the prior art, the electric motor roller with external motor and built-in deceleration mechanism has the advantages of large deceleration mechanism arrangement space and good heat dissipation performance. However, this type of roller structure has the problem that the supporting members mainly arranged at both ends of the axial direction of the roller body provide the rigidity of the roller. Therefore, the overall rigidity is not high, which greatly limits the design of the axial size of the roller body. In some application scenarios, such as on the electric motor roller conveying line, the axial length of the roller greatly limits the size of the conveyed object. For example, in the use process of the winch, due to the short axial length of the roller, the external moving mechanism is needed to drive the roller to move back and forth along the axial direction to ensure the verticality and stability of the steel wire rope during winding. This greatly limits the applicability of the roller.

[0003] SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides an electric motor roller with built-in closed planetary deceleration and external motor drive, which aims to enhance the rigidity of the roller without increasing the external reinforcing mechanism and meet the carrying capacity of a single roller.

[0005] The technical scheme adopted by the present application is as follows:

[0006] An electric motor roller with built-in closed planetary deceleration and external motor drive, which comprises a closed two-stage planetary deceleration mechanism located inside the roller body, and a motor located outside the roller body and connected in power with the input end of the closed two-stage planetary deceleration mechanism, and a support body, wherein the support body comprises a roller fixing shaft, a two-stage gear carrier, a primary gear ring, a gear ring support seat and a motor support shaft arranged in sequence along the axial direction, and the roller fixing shaft, the two-stage gear carrier, the primary gear ring, the gear ring support seat and the motor support shaft form a whole continuous along the axial direction without interruption, and the support member is supported in the roller body and remains fixed during the operation of the roller;

[0007] The roller fixing shaft is matched with the output side end cover of the roller body through a bearing, and the outer end of the roller fixing shaft is connected with the external support, and the inner end is connected with the two-stage gear carrier;

[0008] The two-stage gear carrier is located in the shell of the closed two-stage planetary deceleration mechanism and is used for installing two-stage planetary gears;

[0009] The primary ring gear is located in the closed secondary planetary reduction mechanism housing and is used for meshing transmission with the primary planetary gear, and the primary ring gear is connected with the secondary gear carrier;

[0010] The ring gear support seat is used for providing axial support for the primary ring gear, and is fixedly connected with the motor support shaft or is integrally formed as a support connecting part, the support connecting part is a hollow structure, one end of which is connected with the primary ring gear, and the other end is fixedly connected with the motor, and the motor output shaft is arranged in the hollow structure.

[0011] Further technical solutions are as follows:

[0012] The closed secondary planetary reduction mechanism housing comprises an input side end cover, a secondary ring gear and a gear carrier end seat arranged in sequence along the axial direction, the secondary ring gear is used for meshing with the secondary planetary gear and outputting power to the barrel;

[0013] The input side end cover is directly press-fitted and tightly matched with the barrel, or is fixedly connected through a connecting sleeve, and the input side end cover is matched with the motor support shaft through a bearing and is provided with a sealing element;

[0014] The inner wall of the secondary ring gear is provided with internal teeth for meshing with the secondary planetary gear of the closed secondary planetary reduction mechanism, and the two axial ends of the secondary ring gear are connected with the input side end cover and the gear carrier end seat respectively;

[0015] The gear carrier end seat is matched with the secondary gear carrier through a bearing and is provided with a sealing element.

[0016] The secondary sun gear of the closed secondary planetary reduction mechanism is press-fitted on a mounting part for mounting the primary planetary gear.

[0017] The mounting part of the closed secondary planetary reduction mechanism for mounting the primary planetary gear is a primary planetary disc or a primary planetary carrier, the primary planetary disc is a disc structure and the primary planetary gear is assembled into a cantilever type planetary gear structure, and the primary planetary carrier is a cage structure and the primary planetary gear is assembled into a cage type planetary gear structure.

[0018] The fixed connection mode of the motor support shaft and the motor is direct interference fit, welding or connection through fasteners.

[0019] The ring gear support seat and the motor support shaft are press-fitted and tightly matched or are connected through a flat key.

[0020] The primary ring gear and the ring gear support seat are interference fitted or connected through fasteners.

[0021] The output side end cover and the barrel are directly press-fitted and tightly matched, or are fixedly connected through a connecting sleeve.

[0022] The connection mode of the input side end cover, the secondary gear ring and the gear carrier end seat is welding or connecting through fasteners.

[0023] The barrel body is a barrel body structure for a drum conveying line or a barrel body structure for a winch.

[0024] The beneficial effects of the present application are as follows:

[0025] When the inventive drum is working, the support body plays a good supporting role in the barrel body due to the uninterrupted 'through shaft' structure in the axial direction, greatly improving the rigidity of the drum. Furthermore, the size design of the barrel body is expanded, solving the problem of limited size design and use scene of the drum due to insufficient rigidity in the prior art.

[0026] The first and second gear rings of the closed secondary planetary reduction mechanism are designed in a separated form. On the one hand, the first gear ring is fixedly arranged, which can be regarded as a derived shaft body, i.e. a part of the support member, further enhancing the rigidity. On the other hand, the first gear ring is built-in the second gear ring, and in working, the first gear ring is fixed and the second gear ring rotates, without interfering with each other, improving the flexibility of design and assembly.

[0027] Other features and advantages of the present application will be described in the subsequent specification or understood through the implementation of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Fig. 1 is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Fig. 2 is a schematic diagram of the overall structure of another embodiment of the present application, which contains a difference from the first planetary gear mounting member shown in Fig. 1.

[0030] Fig. 3 is a schematic diagram of the overall structure of another embodiment of the present application, which contains a difference from the connection of the gear ring support seat and the motor support shaft shown in Fig. 2.

[0031] Fig. 4 is a schematic diagram of the overall structure of another embodiment of the present application, which contains a difference from the connection of the support connecting part and the motor shown in Fig. 3.

[0032] Fig. 5 is a schematic diagram of the overall structure of another embodiment of the present application, which contains a difference from the connection of the output side end cover and the barrel body shown in Fig. 1.

[0033] Fig. 6 is a schematic diagram of the overall structure of another embodiment of the present application, which contains a difference from the barrel body shown in Fig. 1.

[0034] In the figure: 1, the drum fixed shaft; 2, the output side end cover; 3, the connecting sleeve; 4, the barrel; 5, the flat key; 6, the gear carrier end seat; 7, the second class gear ring; 8, the input side end cover; 9, the first class gear ring; 10, the second bearing; 11, the first bolt; 12, the motor; 121, the motor output shaft; 13, the first sealing element; 14, the second bolt; 15, the third sealing element; 16, the first class planetary gear; 17, the first class planetary disc; 18, the second class planetary gear; 19, the second class sun gear; 20, the third bearing; 21, the second sealing element; 22, the second class gear carrier; 23, the first bearing; 24, the fourth sealing element; 25, the support connecting part; 26, the third bolt; 27, the first class planet carrier; 121, the motor output shaft; 251, the motor support shaft; 252, the gear ring support seat. DETAILED DESCRIPTION

[0035] The specific embodiments of the present application are described below in conjunction with the accompanying drawings.

[0036] Referring to FIG. 1, the electric drum of the present embodiment is driven by a built-in closed planetary reduction and an external motor, and has the structure as follows: a closed second class planetary reduction mechanism located in the barrel 4, and a motor 12 located outside the barrel 4 and connected with the input end of the closed second class planetary reduction mechanism. The structure of the closed second class planetary reduction mechanism includes a housing and a transmission structure arranged in the housing, which includes a first class planetary gear 16, a first class gear ring 9, a first class planetary disc 17, a second class sun gear 19, a second class planetary gear 18, a second class gear ring 7, and a second class gear carrier 22.

[0037] The electric drum further includes a support body, and the structure of the support body includes the drum fixed shaft 1, the second class gear carrier 22, the first class gear ring 9, the gear ring support seat 252, and the motor support shaft 251 arranged in sequence along the axial direction. The drum fixed shaft 1, the second class gear carrier 22, the first class gear ring 9, the gear ring support seat 252, and the motor support shaft 251 constitute a whole that is continuous along the axial direction and is not broken in the middle. The axial dimension of the support body is not less than the axial dimension of the barrel 4, the support body is supported in the barrel 4, and the support body is kept fixed during the operation of the drum.

[0038] The drum fixed shaft 1 is matched with the output side end cover 2 of the barrel 4 through the first bearing 23. The outer end of the drum fixed shaft 1 extends out of the barrel for connection with an external support, and the inner end of the drum fixed shaft 1 is connected with the second class gear carrier 22.

[0039] The second class gear carrier 22 is located in the housing of the closed second class planetary reduction mechanism, and is used for mounting the second class planetary gear 18.

[0040] The first class gear ring 9 is located in the housing of the closed second class planetary reduction mechanism, and is used for meshing transmission with the first class planetary gear 16. The first class gear ring 9 is connected with the second class gear carrier 22.

[0041] The gear ring support seat 252 is used to provide axial support for the primary gear ring 9, and the gear ring support seat 252 is fixedly connected with the motor support shaft 251 or integrally formed as a support connecting part 25 as shown in FIG. 3. The support connecting part 25 is a hollow structure, one end of which is connected with the primary gear ring 9, and the other end is fixedly connected with the motor 12. The hollow structure is used to pass the motor output shaft 121, and the output end is provided with a primary sun gear;

[0042] As a preferred mode, the motor support shaft 251 is provided with a mounting part for connecting with an external support;

[0043] The closed secondary planetary reduction mechanism shell includes an input side end cover 8, a secondary gear ring 7 and a gear carrier end seat 6 arranged in sequence along the axial direction. The secondary gear ring 7 is used to mesh with the secondary planetary gear 18 and output power to the barrel 4.

[0044] The working principle of the embodiment is as follows:

[0045] The primary sun gear meshes with the primary planetary gear 16 to achieve primary speed reduction. The primary planetary gear 16 meshes with the primary gear ring 7. The primary planetary disc 17 for mounting the primary planetary gear 16 transmits power to the secondary sun gear 19. The secondary sun gear 19 meshes with the secondary planetary gear 18. The secondary planetary gear 18 meshes with the secondary gear ring 7 to achieve secondary speed reduction. The secondary gear ring 7 transmits power to the barrel 4 through the input side end cover 8.

[0046] When the drum is working, the support body has a good supporting effect in the barrel 4 due to the uninterrupted "through shaft" structure along the axial direction, greatly improving the rigidity of the drum. Further, the size design of the barrel is expanded, solving the problem of limited size design and use scene of the drum due to insufficient rigidity in the prior art.

[0047] The primary and secondary gear rings of the closed secondary planetary reduction mechanism are designed in a separated form. On the one hand, the primary gear ring 9 is fixedly arranged, which can be regarded as a derived shaft body, i.e., a part of the support member, further enhancing the rigidity. On the other hand, the primary gear ring 9 is built-in the secondary gear ring 7. In working, the primary gear ring 9 is fixed, and the secondary gear ring 7 rotates, without interfering with each other, improving the flexibility of design and assembly.

[0048] As a preferred mode, the secondary sun gear 19 of the closed secondary planetary reduction mechanism is press-fitted on a mounting member for mounting the primary planetary gear 16. The mounting member of the closed secondary planetary reduction mechanism for mounting the primary planetary gear 16 is a primary planetary disc 17 as shown in FIG. 1 or a primary planetary carrier 27 as shown in FIG. 2. The primary planetary disc 17 is a disc structure, and the primary planetary gear 16 is assembled into a cantilever planetary gear structure. The primary planetary carrier 27 is a cage structure, and the primary planetary gear 16 is assembled into a cage planetary gear structure.

[0049] As a specific embodiment, the inner wall of the secondary ring gear 7 is provided with internal teeth for engaging with the secondary planetary gear 18 of the closed secondary planetary reduction mechanism, and the two axial ends of the secondary ring gear 7 are connected with the input side end cover 8 and the gear carrier end seat 6 respectively. The connection mode of the input side end cover 8, the secondary ring gear 7 and the gear carrier end seat 6 can be welding or connecting through fasteners.

[0050] As a specific embodiment, the connection mode between the output side end cover 2 and the cylinder body 4, and the connection mode between the input side end cover 8 and the cylinder body 4 are as follows: after being directly pressed into the cylinder body 4 (the output side end cover 2 and the input side end cover 8 are pressed into the cylinder body 4), a tight fit is achieved as shown in FIG. 5, or a fixed connection is achieved through the connecting sleeve 3 and the first bolt 11 as shown in FIGS. 1-4.

[0051] As a specific embodiment, the input side end cover 8 is matched with the motor support shaft 251 through the second bearing 10, and is provided with the first sealing member 13; the gear carrier end seat 6 is matched with the secondary gear carrier 22 through the third bearing 20, and is provided with the second sealing member 21.

[0052] As a specific embodiment, the primary ring gear 9 is interference-fitted with the ring gear support seat 252, or is connected through fasteners. As a preferred mode, the ring gear support seat 252, the primary ring gear 9 and the secondary gear carrier 22 are connected through the second bolt 14.

[0053] As a specific embodiment, the fixed connection mode between the motor support shaft 251 and the motor 12 is as follows: direct interference fit, or welding, or connecting through the third bolt 26 as shown in FIG. 4.

[0054] As a specific embodiment, the ring gear support seat 252 is tightly fitted or connected with the motor support shaft 251 after being pressed into the ring gear support seat 252.

[0055] As a specific embodiment, the connection mode between the inner end of the drum fixing shaft 1 and the secondary gear carrier 22 is connecting through the flat key 5.

[0056] As a specific embodiment, the third sealing member 15 is arranged at the position of the motor output shaft 121 close to the primary sun gear, for sealing with the motor support shaft 251; the fourth sealing member 24 is arranged on the drum fixing shaft 1, for sealing with the output side end cover 2.

[0057] As a specific embodiment, the cylinder body 4 is a cylinder body structure for a drum conveying line as shown in FIGS. 1-5, or a cylinder body structure for a winch as shown in FIG. 6. As can be seen from FIG. 6, the outer wall of the cylinder body 4 for the winch is provided with a rope groove for winding a steel wire rope, and the tightening and release of the steel wire rope can be achieved by arranging a brake mechanism inside or outside the cylinder body.

[0058] To sum up, the embodiment greatly meets the bearing capacity of a single roller, helps to expand the axial size design of the cylinder, and improves the convenience in use in various scenes with high rigidity requirements.

[0059] Those skilled in the art can understand that the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A built-in closed planetary deceleration external motor driven electric roller, its structure is: including a closed two-stage planetary deceleration mechanism located in the cylinder (4), and a motor (12) located outside the cylinder (4) and power connected with the input end of the closed two-stage planetary deceleration mechanism, characterized in that, Further comprise a support body, the support body comprises the drum fixed shaft (1) which is sequentially arranged along the axial direction, the secondary gear carrier (22), the primary gear ring (9), the gear ring support seat (252) and the motor support shaft (251), the drum fixed shaft (1), secondary gear carrier (22), primary gear ring (9), gear ring support seat (252) and motor support shaft (251) constitute the whole along the axial direction continuously, the middle is not continuous, the support is supported in the barrel (4), and fixed when the drum works; The drum fixed shaft (1) is matched with the output side end cover (2) of the barrel (4) through a bearing, the outer end of the drum fixed shaft (1) is used for being connected with an external support, and the inner end is connected with the secondary gear carrier (22); The secondary gear carrier (22) is located in the closed secondary planetary reduction mechanism shell, and is used for installing the secondary planetary gear (18); The primary gear ring (9) is located in the closed secondary planetary reduction mechanism shell, is used for meshing transmission with the primary planetary gear (16), and the primary gear ring (9) is connected with the secondary gear carrier (22); The gear ring support seat (252) is used for providing axial support for the primary gear ring (9), the gear ring support seat (252) is fixedly connected with the motor support shaft (251), or is integrally formed as a support connecting part (25), one end of the support connecting part (25) is connected with the primary gear ring (9), the other end is fixedly connected with the motor (12), and the motor output shaft (121) is arranged in the hollow structure.

2. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The closed secondary planetary reduction mechanism shell comprises the input side end cover (8), the secondary gear ring (7) and the gear carrier end seat (6) which are sequentially arranged along the axial direction, the secondary gear ring (7) is used for meshing with the secondary planetary gear (18) and outputting power to the barrel (4); The input side end cover (8) is directly press-fitted and tightly matched with the barrel (4), or is fixedly connected through a connecting sleeve (3), and the input side end cover (8) is matched with the motor support shaft (251) through a bearing and is provided with a sealing element; The inner wall of the secondary gear ring (7) is provided with internal teeth for meshing with the secondary planetary gear (18) of the closed secondary planetary reduction mechanism, and the two ends of the secondary gear ring (7) are connected with the input side end cover (8) and the gear carrier end seat (6) respectively; The gear carrier end seat (6) is matched with the secondary gear carrier (22) through a bearing and is provided with a sealing element.

3. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The secondary sun gear (19) of the closed secondary planetary reduction mechanism is press-fitted on a mounting part for mounting the primary planetary gear (16).

4. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1 or 3, characterized in that, The mounting part for mounting the primary planetary gear (16) of the closed secondary planetary reduction mechanism is a primary planetary disc (17) or a primary planetary carrier (27); the primary planetary disc (17) is a disc structure, and the primary planetary gear (16) is assembled into a cantilever type planetary gear structure; the primary planetary carrier (27) is a cage type structure, and the primary planetary gear (16) is assembled into a cage type planetary gear structure.

5. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The fixed connection mode of the motor support shaft (251) and the motor (12) is direct interference fit, welding or connection through a fastener.

6. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The tooth ring support seat (252) is press-fitted with the motor support shaft (251) and connected by a tight key.

7. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The primary tooth ring (9) is interference-fitted with the tooth ring support seat (252) or connected by a fastener.

8. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The output side end cover (2) is directly press-fitted with the cylinder (4) and connected by a connecting sleeve (3).

9. The electric drum driven by built-in closed planetary reduction and external motor according to claim 2, characterized in that, The input side end cover (8), the secondary tooth ring (7) and the gear carrier end seat (6) are connected by welding or a fastener.

10. The electric drum driven by built-in closed planetary reduction and external motor according to claim 1, characterized in that, The cylinder (4) is a cylinder structure for a roller conveyor line or a cylinder structure for a winch.

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