Electric roller with built-in closed planetary reduction and external motor drive

Abstract

The utility model relates to an electric roller driven by a built-in closed planetary reduction and an external motor. The electric roller comprises a closed two-stage planetary reduction mechanism located in a roller body and the motor located outside the roller body. The supporting body is an integral body which is formed by a roller fixing shaft, a secondary gear frame, a primary gear ring, a gear ring supporting seat and a motor supporting shaft, is continuous in the axial direction and is not disconnected in the middle, and the supporting body is supported in the roller body and is kept fixed when the roller works; the roller fixing shaft is matched with an output side end cover of the roller body through a bearing; the first-stage gear ring is located in the closed second-stage planetary reduction mechanism shell and used for being in meshing transmission with the first-stage planetary gear, and the first-stage gear ring is connected with the second-stage gear frame; the gear ring supporting seat is connected with the motor supporting shaft to form a supporting connecting part which is of a hollow structure, the two ends of the supporting connecting part are connected with the first-stage gear ring and the motor respectively, and a motor output shaft penetrates through the supporting connecting part. The rigidity of the roller is enhanced, and the bearing capacity of a single roller is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric rollers, in particular to an electric roller with an internal closed planetary reduction and an external motor drive. Background Art

[0002] In the prior art, the electric roller body with an external motor and an internal reducer has the advantages of a large layout space for the reduction mechanism and good heat dissipation performance. The problem with this type of roller structure is that the supporting members that play a supporting role are mainly arranged at both ends of the cylinder body in the axial direction. Therefore, the rigidity of the roller mainly depends on the supporting members at both ends of the cylinder body, and the overall rigidity is not high, resulting in great limitations in the design of the axial dimension of the cylinder body. In some application scenarios, such as on an electric roller conveyor line, the axial length of the roller greatly limits the size of the item to be conveyed. Another example is during the use of a winch. Due to the short axial length of the roller, when winding and unwinding the steel wire rope, an external moving mechanism is required to drive the roller to move axially in a reciprocating manner to ensure the perpendicularity and force stability during the winding process of the steel wire rope. This greatly limits the applicability of the roller. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an electric roller with an internal closed planetary reduction and an external motor drive, aiming to enhance the rigidity of the roller without adding an external strengthening mechanism and meet the load-bearing capacity of a single roller.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An electric roller with an internal closed planetary reduction and an external motor drive, its structure is: including a closed two-stage planetary reduction mechanism located inside the cylinder body, and a motor located outside the cylinder body and power-connected to the input end of the closed two-stage planetary reduction mechanism. It also includes a support body, and the support body includes a roller fixed shaft, a second-stage gear rack, a first-stage gear ring, a gear ring support seat, and a motor support shaft arranged in sequence along the axial direction. The roller fixed shaft, the second-stage gear rack, the first-stage gear ring, the gear ring support seat, and the motor support shaft form an integral body that is continuous along the axial direction and does not break in the middle. The support member supports inside the cylinder body and remains fixed during the operation of the roller;

[0006] The roller fixed shaft is fitted with the output side end cover of the cylinder body through a bearing. The outer end of the roller fixed shaft is used to connect with an external bracket, and the inner end is connected to the second-stage gear rack;

[0007] The second-stage gear rack is located inside the housing of the closed two-stage planetary reduction mechanism and is used to install the second-stage planetary gears;

[0008] The first-stage gear ring is located inside the housing of the closed two-stage planetary reduction mechanism and is used for meshing transmission with the first-stage planetary gears. The first-stage gear ring is connected to the second-stage gear rack;

[0009] The ring gear support seat is used to provide axial support for the first-stage ring gear. The ring gear support seat is fixedly connected to the motor support shaft or integrally formed into a support connection part. The support connection part is a hollow structure, one end of which is connected to the first-stage ring gear, and the other end is fixedly connected to the motor. The motor output shaft passes through the hollow structure.

[0010] A further technical solution is as follows:

[0011] The housing of the enclosed second-stage planetary reduction mechanism includes an input-side end cover, a second-stage ring gear, and a gear carrier end seat arranged axially in sequence. The second-stage ring gear is used to mesh with the second-stage planetary gears and output power to the cylinder body;

[0012] The input-side end cover and the cylinder body are directly press-fitted and tightly fitted, or fixedly connected through a connecting sleeve. And the input-side end cover and the motor support shaft are in bearing fit and are provided with a seal;

[0013] The inner wall of the second-stage ring gear is provided with internal teeth for meshing with the second-stage planetary gears of the enclosed second-stage planetary reduction mechanism. The two axial ends of the second-stage ring gear are respectively connected to the input-side end cover and the gear carrier end seat;

[0014] The gear carrier end seat and the second-stage gear carrier are in bearing fit and are provided with a seal.

[0015] The second-stage sun gear of the enclosed second-stage planetary reduction mechanism is press-fitted on the mounting part for mounting the first-stage planetary gears.

[0016] The mounting part for mounting the first-stage planetary gears of the enclosed second-stage planetary reduction mechanism is the first-stage planetary disk or the first-stage planetary carrier; the first-stage planetary disk is a disk structure, and the first-stage planetary gears are assembled into a cantilever planetary gear structure; the first-stage planetary carrier is a cage structure, and the first-stage planetary gears are assembled into a cage planetary gear structure.

[0017] The fixed connection method between the motor support shaft and the motor is: direct interference fit, or welding, or connection through fasteners.

[0018] The ring gear support seat and the motor support shaft are tightly fitted after press-fitting or connected by a flat key.

[0019] The first-stage ring gear and the ring gear support seat are in interference fit or connected through fasteners.

[0020] The output-side end cover and the cylinder body are directly press-fitted and tightly fitted, or fixedly connected through a connecting sleeve.

[0021] The connection methods of the input-side end cover, the second-stage ring gear, and the gear carrier end seat are: welding or connection through fasteners.

[0022] The cylinder body is a cylinder structure for a roller conveyor line or a cylinder structure for a winch.

[0023] The beneficial effects of the present utility model are as follows:

[0024] When the roller of the utility model is working, since the support body has an uninterrupted "through-axis" structure along the axial direction, it plays a very good supporting role in the cylinder body, greatly improving the rigidity of the roller. Furthermore, the size design of the cylinder body is expanded, and the problem that the roller size design and the use scenario are limited due to insufficient rigidity in the prior art is solved.

[0025] The first and second ring gears of the enclosed two-stage planetary reduction mechanism of the present utility model are of a split design form. On the one hand, the first ring gear is fixedly arranged and can be regarded as a derivative shaft body, that is, as a part of the support member, further enhancing the rigidity. On the other hand, the first ring gear is placed inside the second ring gear. During operation, the first ring gear is fixed and the second ring gear rotates, and the two do not interfere with each other, improving the flexibility of design and assembly.

[0026] Other features and advantages of the present utility model will be described in the subsequent description or will be understood by implementing the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an implementation manner of an embodiment of the present utility model.

[0028] Figure 2 It is for an embodiment of the present utility model including Figure 1 Another schematic diagram of the overall structure of an implementation manner different from the shown first-stage planetary gear mounting member.

[0029] Figure 3 It is for an embodiment of the present utility model including Figure 2 Another schematic diagram of the overall structure of an implementation manner different from the shown connection between the ring gear support seat and the motor support shaft.

[0030] Figure 4 It is for an embodiment of the present utility model including Figure 3 Another schematic diagram of the overall structure of an implementation manner different from the shown connection between the support connection part and the motor.

[0031] Figure 5 It is for an embodiment of the present utility model including Figure 1 Another schematic diagram of the overall structure of an implementation manner different from the shown connection between the output side end cover and the cylinder body.

[0032] Figure 6 It is for an embodiment of the present utility model including Figure 1 Another schematic diagram of the overall structure of an implementation manner different from the shown cylinder body.

[0033] In the figure: 1. roller fixing shaft; 2. output side end cover; 3. connecting sleeve; 4. cylinder; 5. flat key; 6. gear frame end seat; 7. secondary gear ring; 8. input side end cover; 9. primary gear ring; 10. second bearing; 11. first bolt; 12. motor; 121. motor output shaft; 13. first seal; 14. second bolt; 15. third seal; 16. primary planetary gear; 17. primary planetary disk; 18. secondary planetary gear; 19. secondary sun gear; 20. third bearing; 21. second seal; 22. secondary gear frame; 23. first bearing; 24. fourth seal; 25. support connection; 26. third bolt; 27. primary planetary frame; 121. motor output shaft; 251. motor support shaft; 252. gear ring support seat. DETAILED DESCRIPTION

[0034] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0035] See also Figure 1 The electric drum with a built-in closed planetary reduction and an external motor drive of the present embodiment has the following structure: it includes a closed two-stage planetary reduction mechanism located in a cylinder 4, and a motor 12 located outside the cylinder 4 and connected to the input end of the closed two-stage planetary reduction mechanism. The structure of the closed two-stage planetary reduction mechanism includes a housing and a transmission structure arranged in the housing, which includes a primary planetary gear 16, a primary ring gear 9, a primary planetary disc 17, a secondary sun gear 19, a secondary planetary gear 18, a secondary ring gear 7, and a secondary gear rack 22;

[0036] The electric drum also includes a support body, the structure of which includes a drum fixed shaft 1, a secondary gear frame 22, a primary gear ring 9, a gear ring support seat 252 and a motor support shaft 251 which are sequentially arranged along the axial direction. The drum fixed shaft 1, the secondary gear frame 22, the primary gear ring 9, the gear ring support seat 252 and the motor support shaft 251 form a whole which is continuous along the axial direction and is not broken in the middle, and the axial dimension of the support member is not less than the axial dimension of the cylinder 4. The support member is supported in the cylinder 4 and remains fixed when the drum is working;

[0037] The drum fixed shaft 1 is matched with the output side end cover 2 of the cylinder 4 through the first bearing 23, the outer end of the drum fixed shaft 1 extends out of the cylinder to be connected with the external bracket, and the inner end is connected with the secondary gear rack 22;

[0038] The secondary gear carrier 22 is located in the closed secondary planetary reduction mechanism housing and is used to mount the secondary planetary gear 18;

[0039] The primary ring gear 9 is located in the closed secondary planetary reduction mechanism housing and is used for meshing and transmission with the primary planetary gear 16. The primary ring gear 9 is connected to the secondary gear frame 22.

[0040] The ring gear support seat 252 is used to provide axial support for the first-stage ring gear 9. The ring gear support seat 252 is fixedly connected to the motor support shaft 251 or integrally formed into a support connection part 25 as Figure 3 shown. The support connection part 25 is a hollow structure. One end thereof is connected to the first-stage ring gear 9, and the other end is fixedly connected to the motor 12. The motor output shaft 121 is used to pass through the hollow structure, and a first-stage sun gear is provided at its output end;

[0041] As a preferred mode, an installation part for connecting with an external bracket is provided on the motor support shaft 251;

[0042] The housing of the enclosed two-stage planetary reduction mechanism includes an input side end cover 8, a second-stage ring gear 7, and a gear rack end seat 6 arranged in sequence along the axial direction. The second-stage ring gear 7 is used to mesh with the second-stage planetary gear 18 and transmit power to the cylinder body 4.

[0043] The working principle of this embodiment:

[0044] The first-stage sun gear meshes with the first-stage planetary gear 16 to achieve first-stage reduction; the first-stage planetary gear 16 meshes with the first-stage ring gear 7. The first-stage planetary disk 17 for installing the first-stage planetary gear 16 transmits power to the second-stage sun gear 19. The second-stage sun gear 19 meshes with the second-stage planetary gear 18, and the second-stage planetary gear 18 meshes with the second-stage ring gear 7 to achieve second-stage reduction. The second-stage ring gear 7 transmits power to the cylinder body 4 through the input side end cover 8.

[0045] When the drum of this embodiment is working, since the support body has an uninterrupted "through-shaft" structure along the axial direction, it plays a good supporting role in the cylinder body 4, greatly improving the rigidity of the drum. Furthermore, the size design of the cylinder body is expanded, and the problem that the drum size design and the use scenario are limited due to insufficient rigidity in the prior art is solved.

[0046] The first and second-stage ring gears of the enclosed two-stage planetary reduction mechanism of this embodiment are of a split design form. On the one hand, the first-stage ring gear 9 is fixedly arranged, and it can be regarded as a derivative shaft body, that is, as a part of the support member, further enhancing the rigidity. On the other hand, the first-stage ring gear 9 is built into the second-stage ring gear 7. During operation, the first-stage ring gear 9 is fixed and the second-stage ring gear 7 rotates, and the two do not interfere with each other, improving the flexibility of design and assembly.

[0047] As a preferred mode, the second-stage sun gear 19 of the enclosed two-stage planetary reduction mechanism is press-fitted on the mounting member for installing the first-stage planetary gear 16. The mounting member for installing the first-stage planetary gear 16 of the enclosed two-stage planetary reduction mechanism is Figure 1 the first-stage planetary disk 17 shown as Figure 2The shown first-stage planet carrier 27; the first-stage planet disk 17 is of a disk structure, assembling the first-stage planet gears 16 into a cantilever planet gear structure; the first-stage planet carrier 27 is of a cage structure, assembling the first-stage planet gears 16 into a cage planet gear structure.

[0048] As a specific implementation manner, internal teeth for meshing with the second-stage planet gears 18 of the enclosed second-stage planetary reduction mechanism are provided on the inner wall of the second-stage gear ring 7, and both axial ends of the second-stage gear ring 7 are respectively connected to the input-side end cover 8 and the gear carrier end seat 6. The connection manners of the input-side end cover 8, the second-stage gear ring 7, and the gear carrier end seat 6 can be: welding or connection by fasteners.

[0049] As a specific implementation manner, the connection manners between the output-side end cover 2 and the cylinder body 4, and between the input-side end cover 8 and the cylinder body 4 are: after direct press-fitting (pressing the output-side end cover 2 and the input-side end cover 8 into the cylinder body 4), a tight fit as Figure 5 shown, or fixed connection by using a connecting sleeve 3 with a first bolt 11 as Figures 1 to 4 shown.

[0050] As a specific implementation manner, the input-side end cover 8 and the motor support shaft 251 are fitted with each other through a second bearing 10, and a first seal 13 is provided; the gear carrier end seat 6 and the second-stage gear carrier 22 are fitted with each other through a third bearing 20, and a second seal 21 is provided.

[0051] As a specific implementation manner, the first-stage gear ring 9 and the gear ring support seat 252 are in interference fit or connected by fasteners. As a preferred manner, the gear ring support seat 252, the first-stage gear ring 9, and the second-stage gear carrier 22 are connected by a second bolt 14.

[0052] As a specific implementation manner, the fixed connection manner between the motor support shaft 251 and the motor 12 is: direct interference fit, or welding, or connection by a third bolt 26 as Figure 4 shown.

[0053] As a specific implementation manner, after press-fitting (pressing the motor support shaft 251 into the gear ring support seat 252) between the gear ring support seat 252 and the motor support shaft 251, a tight fit or a key connection is adopted.

[0054] As a specific implementation manner, the connection manner between the inner end of the roller fixed shaft 1 and the second-stage gear carrier 22 is: connection by a key 5.

[0055] As a specific implementation manner, a third seal 15 is provided at a position of the motor output shaft 121 close to the first-stage sun gear for sealing with the motor support shaft 251; a fourth seal 24 is provided on the roller fixed shaft 1 for sealing with the output-side end cover 2.

[0056] As a specific implementation manner, the cylinder body 4 is a cylinder structure for a roller conveyor line as Figures 1 to 5 shown, or a cylinder structure for a winch as Figure 6 shown. As Figure 6 known, a rope groove is provided on the outer wall of the cylinder body 4 for the winch to wind the steel wire rope, and the tightening and releasing of the steel wire rope can be realized by arranging a braking mechanism inside or outside the cylinder body.

[0057] In summary, this embodiment greatly meets the load-bearing capacity of a single roller, helps to expand the design of the axial dimension of the cylinder body, and improves the convenience of use in various scenarios with high rigidity requirements.

[0058] Those of ordinary skill in the art can understand that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric drum with an internal enclosed planetary reduction and an external motor drive, the structure of which is as follows: it includes an enclosed two-stage planetary reduction mechanism located inside the drum body (4), and a motor (12) located outside the drum body (4) and power-connected to the input end of the enclosed two-stage planetary reduction mechanism, characterized in that, It further includes a support body, which includes a roller fixed shaft (1), a secondary gear rack (22), a primary gear ring (9), a gear ring support seat (252), and a motor support shaft (251) arranged in sequence along the axis. The roller fixed shaft (1), the secondary gear rack (22), the primary gear ring (9), the gear ring support seat (252), and the motor support shaft (251) form an integral body that is continuous along the axis and without interruption in the middle. The support member is supported inside the cylinder body (4) and remains fixed during the operation of the roller. The roller fixed shaft (1) is fitted with the output side end cover (2) of the cylinder body (4) through a bearing. The outer end of the roller fixed shaft (1) is used to connect with an external bracket, and the inner end is connected with the secondary gear rack (22). The secondary gear rack (22) is located inside the housing of the enclosed secondary planetary reduction mechanism and is used to mount the secondary planet gears (18). The primary gear ring (9) is located inside the housing of the enclosed secondary planetary reduction mechanism and is used to mesh and transmit power with the primary planet gears (16). The primary gear ring (9) is connected with the secondary gear rack (22). The gear ring support seat (252) is used to provide axial support for the primary gear ring (9). The gear ring support seat (252) is fixedly connected with the motor support shaft (251) or integrally formed into a support connection part (25). The support connection part (25) is a hollow structure. One end of it is connected with the primary gear ring (9), and the other end is fixedly connected with the motor (12). The motor output shaft (121) is passed through the hollow structure.

2. The electric drum with an internal enclosed planetary speed reduction and an external motor drive according to claim 1, wherein The housing of the enclosed secondary planetary reduction mechanism includes an input side end cover (8), a secondary gear ring (7), and a gear rack end seat (6) arranged in sequence along the axis. The secondary gear ring (7) is used to mesh with the secondary planet gears (18) and output power to the cylinder body (4). The input side end cover (8) and the cylinder body (4) are directly press-fitted and tightly fitted, or fixedly connected through a connecting sleeve (3). And the input side end cover (8) and the motor support shaft (251) are fitted through a bearing and are provided with a sealing member. The inner wall of the secondary gear ring (7) is provided with internal teeth for meshing with the secondary planet gears (18) of the enclosed secondary planetary reduction mechanism. The two axial ends of the secondary gear ring (7) are respectively connected with the input side end cover (8) and the gear rack end seat (6). The gear rack end seat (6) and the secondary gear rack (22) are fitted through a bearing and are provided with a sealing member.

3. The electric drum with an internal enclosed planetary speed reducer and an external motor drive according to claim 1, characterized in that, The secondary sun gear (19) of the enclosed secondary planetary reduction mechanism is press-fitted on the mounting member for mounting the primary planet gears (16).

4. The electric drum with an internal enclosed planetary speed reduction and an external motor drive according to claim 1 or 3, characterized in that, The mounting member for mounting the primary planet gears (16) of the enclosed secondary planetary reduction mechanism is a primary planet disk (17) or a primary planet carrier (27). The primary planet disk (17) is a disk structure, and the primary planet gears (16) are assembled into a cantilever planetary gear structure. The primary planet carrier (27) is a cage structure, and the primary planet gears (16) are assembled into a cage planetary gear structure.

5. The electric roller with an internally enclosed planetary reduction and externally mounted motor drive according to claim 1, characterized in that, The fixed connection mode between the motor support shaft (251) and the motor (12) is: direct interference fit, or welding, or connection through fasteners.

6. The electric drum with an internal enclosed planetary reduction and an external motor drive according to claim 1, characterized in that, The ring gear support seat (252) and the motor support shaft (251) are press-fitted and tightly fitted or key-connected after being press-fitted.

7. The electric drum with an internal enclosed planetary reduction and an external motor drive according to claim 1, characterized in that, The first-stage ring gear (9) and the ring gear support seat (252) are interference-fitted or connected by fasteners.

8. The electric roller with an internally enclosed planetary reduction and externally mounted motor drive according to claim 1, characterized in that, The output-side end cover (2) and the cylinder body (4) are press-fitted and tightly fitted directly or fixedly connected through a connecting sleeve (3).

9. The electric roller with an internally enclosed planetary speed reducer and an externally mounted motor drive according to claim 2, characterized in that, The connection methods of the input-side end cover (8), the second-stage ring gear (7) and the gear rack end seat (6) are: welding or connection by fasteners.

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

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