Compact reducer and electromagnetic clutch assembly structure

Abstract

The invention relates to the technical field of speed reducers and electromagnetic clutches, in particular to a compact speed reducer and electromagnetic clutch assembly structure which comprises a supporting shaft, a gear box shell and an armature. An external spline transmission disc and a planetary bracket are rotationally mounted on the supporting shaft; a hollow outer spline shaft is arranged on the left end face of the outer spline transmission disc. A planet wheel is mounted on the planet bracket; the planet gear is meshed with inner teeth of the right half section of the gearbox shell; the supporting shaft is sleeved with a sun gear meshed with the planet gear, and a transmission spline is arranged on an inner hole of the sun gear; the external spline transmission disc is meshed with an internal spline gear ring on the armature to form a spline pair; an armature iron core magnet yoke is installed in an inner hole in the left half section of the gear box shell, and a clutch armature used for generating electromagnetic attraction to an armature is installed on the armature iron core magnet yoke. A contact transmission piece is fixedly installed in an inner hole of the armature and used for being in contact transmission with the planet support. And a reset mechanism is arranged between the external spline transmission disc and the contact transmission piece.

Description

Technical Field

[0001] The present invention relates to the technical fields of speed reducers and electromagnetic clutches, and particularly to an assembly structure of a compact speed reducer and an electromagnetic clutch. Background Art

[0002] In fields such as automotive wheels, aircraft landing gears, and marine shaft drives, a large-torque speed reducer is required to achieve torque and speed conversion, and a reliable clutch is needed to ensure the reliability of the transmission. Additionally, in automotive wheels, aircraft landing gears, and marine shaft systems, there is a central stationary support shaft that serves as the support and mounting fixed shaft for the speed reducer and electromagnetic clutch. Therefore, there is a huge demand for an assembly of a large-torque speed reducer and an electromagnetic clutch with a central stationary support shaft.

[0003] Using a planetary speed reducer can achieve torque and speed conversion at high torque, enabling the design of a speed reducer with high torque density. In traditional large-torque planetary gear speed reducers, a cover plate structure is usually used to ensure the assembly and installation of the speed reducer. An electromagnetic clutch generates a magnetic field using an electromagnetic coil and realizes the engagement and disengagement of the electromagnetic clutch based on the magnetic field attraction and spring force. The electromagnetic clutch requires a magnetic conductive material as the magnetic yoke of the armature winding to construct the electromagnetic clutch magnetic circuit. How to streamline the structure of the planetary gear speed reducer and the electromagnetic clutch and improve the torque density of the system to form an assembly of the planetary gear speed reducer and the electromagnetic clutch is an urgent problem to be solved.

[0004] In the prior art, although there are assembly structures combining a speed reducer and a clutch, for example, the patent application with the publication number CN118686870A discloses a magnetic induction clutch and a speed reducer for a speed reducer, and the patent application with the publication number CN204959367U discloses a speed reducer of a washing machine clutch.

[0005] However, in the above prior art, it is not disclosed how to install a speed reducer and an electromagnetic clutch on a centrally fixed support shaft to obtain an assembly structure of a compact speed reducer and an electromagnetic clutch. Summary of the Invention

[0006] The main object of the present invention is to propose an assembly structure of a compact speed reducer and an electromagnetic clutch, aiming to solve the above technical problems.

[0007] To achieve the above object, the present invention proposes an assembly structure of a compact speed reducer and an electromagnetic clutch, including a support shaft, a gearbox housing and an armature; an external spline drive disk and a planetary bracket are rotatably installed on the support shaft; a hollow external spline shaft is provided on the left end face of the external spline drive disk; planetary gears are installed on the planetary bracket; the planetary gears are meshed with the internal teeth of the right half section of the gearbox housing; a sun gear is sleeved on the support shaft, the inner hole of the sun gear is spaced from the support shaft, and the external teeth of the sun gear are meshed with the planetary gears; a transmission spline is provided on the inner hole of the sun gear; an internal spline gear ring is integrally formed on the left end face of the armature, and the external spline drive disk is meshed with the internal spline gear ring to form a spline pair with axial sliding fit; an armature core yoke is installed in the inner hole of the left half section of the gearbox housing, and a clutch armature for generating electromagnetic suction on the armature is installed on the armature core yoke; a contact transmission member is fixedly installed in the inner hole of the armature for contact transmission with the planetary bracket; a reset mechanism is provided between the external spline drive disk and the contact transmission member.

[0008] Preferably, the reset mechanism includes a sleeve, a spring installation rod and a return spring; the sleeve is embedded on the external spline drive disk, and the sleeve has a cavity with an open left end; the return spring is sleeved on the spring installation rod, and the return spring is arranged in the cavity of the sleeve; the right end of the spring installation rod passes through the right side wall of the sleeve and is connected to the contact transmission member; the left end of the return spring abuts against the stop head of the spring installation rod, and the right end abuts against the right side wall of the sleeve.

[0009] Preferably, the planetary bracket includes a central sleeve, a support disk and a planetary gear installation rod; the support disk is integrally formed on the outer peripheral surface of the right end of the central sleeve; the planetary gear installation rod is integrally formed on the right end face of the support disk.

[0010] Preferably, the planetary gears are installed on the planetary gear installation rods of the planetary bracket, and a first bearing is provided between the planetary gears and the planetary gear installation rods.

[0011] Preferably, the central sleeve of the planetary bracket is sleeved on the support shaft, and two second bearings are provided between the central sleeve and the support shaft.

[0012] Preferably, a third bearing is provided between the armature core yoke and the outer peripheral surface of the left end of the central sleeve.

[0013] Preferably, the contact transmission member is a toothed disk, transmission teeth are provided on the right end face of the toothed disk, and transmission teeth are also provided on the left end face of the central sleeve. When the contact transmission member contacts the central sleeve, the transmission teeth of the two are meshed and transmitted.

[0014] Optionally, the contact transmission member is a friction disk. When the contact transmission member contacts the central sleeve, frictional transmission occurs between the two.

[0015] Preferably, an annular groove with an open left end is provided on the armature core yoke; the clutch armature is installed in the annular groove, and an armature sheath is wrapped around the outside of the clutch armature.

[0016] Preferably, an end cover is provided on the right end face of the gearbox housing; the external spline drive disk is installed on the support shaft through a fourth bearing.

[0017] Due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0018] (1) The assembly structure provided by the present invention integrates the functions of a planetary reducer and an electromagnetic clutch. The planetary reducer can achieve torque and speed conversion under large torque. The armature core yoke can not only be used to install the clutch armature, but also serve as the cover of the left end of the planetary reducer, forming an integrated integration of the left end cover of the reducer and the armature cup of the electromagnetic clutch. Therefore, this assembly structure has the characteristics of short axial length, reduces the space occupancy rate, improves the torque density and power density of the reducer and the electromagnetic clutch, and can be installed on a centrally stationary support shaft to achieve torque and speed conversion and reliable mechanical clutch.

[0019] (2) In the present invention, a third bearing is provided between the outer peripheral surface of the left end of the central sleeve of the armature core yoke and the planetary bracket, and the armature core yoke is installed in the inner hole of the left half section of the gearbox housing. Therefore, the armature core yoke also plays a role in supporting the gearbox housing.

[0020] (3) The assembly structure provided by the present invention can be applied to occasions such as automobile wheels and aircraft landing gears supported by a stationary support shaft, achieving structural simplification, enhancing the inheritance of the original structure, reducing the change of the original support structure layout, and improving the robustness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a cross-sectional view of the assembly structure provided by the present invention;

[0023] Figure 2 It is a schematic diagram when the armature core yoke in the present invention cooperates with the clutch armature, the armature sheath, and the third bearing;

[0024] Figure 3 Schematic diagram of the reset mechanism in the present invention;

[0025] Figure 4 Exploded view of the assembly structure provided by the present invention.

[0026] Explanation of the reference numerals in the drawings: 1. End cover; 2. Gearbox housing; 3. Planet gear; 4. Planet carrier; 4a. Central sleeve; 4b. Support disc; 4c. Planet gear mounting rod; 5. First bearing; 6. Sun gear; 7. Support shaft; 8. Second bearing; 9. Third bearing; 10. Armature core yoke; 10a. Annular groove; 11. Fourth bearing; 12. Armature; 12a. Internal spline gear ring; 13. Contact transmission part; 14. External spline drive disc; 14a. External spline shaft; 15. Sleeve; 16. Spring mounting rod; 17. Return spring; 18. Armature sheath; 19. Clutch armature. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0029] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] As shown in the accompanying drawings, this embodiment provides an assembly structure of a compact speed reducer and an electromagnetic clutch, which includes a support shaft 7, a gearbox housing 2 and an armature 12; an external spline drive disk 14 and a planetary carrier 4 are rotatably installed on the support shaft 7; a hollow external spline shaft 14a is provided on the left end face of the external spline drive disk 14; a planetary gear 3 is installed on the planetary carrier 4; the planetary gear 3 meshes with the internal teeth of the right half section of the gearbox housing 2; a sun gear 6 is sleeved on the support shaft 7, the inner hole of the sun gear 6 is spaced from the support shaft 7, and the external teeth of the sun gear 6 mesh with the planetary gear 3; a transmission spline is provided on the inner hole of the sun gear 6; an internal spline gear ring 12a is integrally formed on the left end face of the armature 12, and the external spline drive disk 14 meshes with the internal spline gear ring 12a to form a spline pair with axial sliding fit; an armature core yoke 10 is installed in the inner hole of the left half section of the gearbox housing 2, and a clutch armature 19 for generating electromagnetic suction force on the armature 12 is installed on the armature core yoke 10; a contact transmission member 13 is fixedly installed in the inner hole of the armature 12 for contact transmission with the planetary carrier 4; a reset mechanism is provided between the external spline drive disk 14 and the contact transmission member 13.

[0031] By adopting the above structure, the sun gear 6 serves as the input end of the entire assembly structure, and the external spline shaft 14a on the left end face of the external spline drive disk 14 serves as the output end of the entire assembly structure. When the clutch armature 19 is in the energized state, the clutch armature 19 uses the electromagnetic coil to generate a magnetic field, forming a suction force on the armature 12 to make the armature 12 move to the right, and then driving the contact transmission member 13 fixed on the armature 12 to move to the right together, so that the contact transmission member 13 forms contact transmission with the planetary carrier 4, transmitting the rotational movement of the planetary carrier 4 to the armature 12. Since the internal spline gear ring 12a on the armature 12 meshes and drives with the external spline drive disk 14, the rotational movement can be transmitted to the external spline drive disk 14, driving the external spline shaft 14a on the external spline drive disk 14 to rotate together. When the clutch armature 19 is in the de-energized state, the clutch armature 19 loses suction force, and under the action of the reset mechanism, it drives the armature 12 to move to the left for reset. At this time, the contact transmission member 13 is separated from the planetary carrier 4, disconnecting the transmission.

[0032] In this embodiment, the electromagnetic clutch jointly constitutes a coupling magnetic circuit through the armature core yoke 10, the clutch armature 19, and the armature 12. After the clutch armature 19 is energized, an electromagnetic force is formed, which can form an electromagnetic suction force on the armature 12. Thus, an electromagnetic clutch is constituted.

[0033] Combined Figure 1 and Figure 3As shown, the reset mechanism includes a sleeve 15, a spring mounting rod 16, and a return spring 17. The sleeve 15 is embedded in the external spline drive disk 14. The sleeve 15 has a cavity with an open left end. The return spring 17 is sleeved on the spring mounting rod 16, and the return spring 17 is disposed in the cavity of the sleeve 15. The right end of the spring mounting rod 16 passes through the right side wall of the sleeve 15 and is connected to the contact drive member 13. The left end of the return spring 17 abuts against the stop of the spring mounting rod 16, and the right end abuts against the right side wall of the sleeve 15.

[0034] The working principle of the above reset mechanism is as follows: When the clutch armature 19 is energized, a suction force is formed on the armature 12, causing the armature 12 to move to the right. At this time, the elastic force of the return spring 17 is overcome, causing the return spring 17 to compress, and the contact drive member 13 forms contact drive with the planetary carrier 4. When the clutch armature 19 is de-energized, the clutch armature 19 loses suction force. Under the action of the elastic force of the return spring 17, the armature 12 moves to the left for reset. At this time, the contact drive member 13 and the planetary carrier 4 are separated from each other, disconnecting the drive.

[0035] Combined with Figure 1 , Figure 4 As shown, the planetary carrier 4 includes a central sleeve 4a, a support disk 4b, and a planetary gear mounting rod 4c. The support disk 4b is integrally formed on the outer peripheral surface of the right end of the central sleeve 4a. The planetary gear mounting rod 4c is integrally formed on the right end surface of the support disk 4b.

[0036] Combined with Figure 1 As shown, the planetary gear 3 is mounted on the planetary gear mounting rod 4c of the planetary carrier 4, and a first bearing 5 is provided between the planetary gear 3 and the planetary gear mounting rod 4c. Further, the central sleeve 4a of the planetary carrier 4 is sleeved on the support shaft 7, and two second bearings 8 are provided between the central sleeve 4a and the support shaft 7. A third bearing 9 is provided between the armature core yoke 10 and the outer peripheral surface of the left end of the central sleeve 4a.

[0037] In this embodiment, the contact drive member 13 is a toothed disk. Transmission teeth are provided on the right end surface of the toothed disk, and transmission teeth are also provided on the left end surface of the central sleeve 4a. When the contact drive member 13 contacts the central sleeve 4a, the transmission teeth of the two are meshed for transmission. By adopting a meshing tooth structure, a jaw-type electromagnetic clutch structure is formed.

[0038] In addition, the contact drive member 13 can also adopt a friction disk. When the contact drive member 13 contacts the central sleeve 4a, the two perform friction drive. By adopting a friction disk structure, a friction-type electromagnetic clutch is formed.

[0039] Combined withFigure 2 As shown, an annular groove 10a with an open left end is provided on the armature core yoke 10, the clutch armature 19 is installed in the annular groove 10a, and an armature sheath 18 is wrapped around the outside of the clutch armature 19.

[0040] Combined Figure 1 As shown, an end cover 1 is provided on the right end face of the gearbox housing 2; the external spline drive disk 14 is installed on the support shaft 7 through a fourth bearing 11.

[0041] The overall structure of the compact speed reducer and electromagnetic clutch provided in this embodiment is specifically installed as follows:

[0042] S1. Installation of the electromagnetic clutch

[0043] The external spline drive disk 14 is installed on the support shaft 7 through a fourth bearing 11, and then the armature 12 press-fitted with the contact drive member 13 is sleeved on the support shaft 7, and the internal spline tooth ring 12a of the armature 12 is sleeved on the external spline drive disk 14 to form a spline pair that can axially slide and cooperate.

[0044] After the armature sheath 18 is put on the outside of the clutch armature 19, it is installed in the annular groove 10a of the armature core yoke 10.

[0045] S2. Installation of the planetary gear speed reducer

[0046] The second bearing 8 is press-fitted on the support shaft 7; the armature core yoke 10 installed with the clutch armature 19 is installed on the central sleeve 4a of the planetary carrier 4 through a third bearing 9; then the planetary carrier 4 is installed on the second bearing 8.

[0047] The installed gearbox housing 2 is sleeved on the armature core yoke 10.

[0048] After the first bearing 5 is installed on the planetary gear mounting rod 4c of the planetary carrier 4, the planetary gear 3 is installed on the first bearing 5 so that the planetary gear 3 meshes with the internal teeth of the right half section of the gearbox housing 6.

[0049] The sun gear 6 is sleeved on the support shaft 7, and the sun gear 6 meshes with the planetary gear 3 to complete the installation of the entire speed reducer.

[0050] S3. Install the end cover 1 and fix the end cover 1 on the right end face of the gearbox housing 2 by using fasteners.

[0051] Application example:

[0052] When the above-mentioned assembly structure is applied to an aircraft landing gear, the straight shaft of the aircraft landing gear serves as the support shaft 7. The gearbox housing 2 is installed on the middle vertical shaft of the landing gear. The output shaft of the landing gear drive motor is inserted into the inner hole of the sun gear 6, and the external spline on the output shaft of the landing gear drive motor meshes with the transmission spline on the inner hole of the sun gear 6 for transmission. The external spline shaft 14a on the left end face of the external spline drive disk 14 is connected to the internal spline of the aircraft wheel hub.

[0053] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention, or direct / indirect application in other related technical fields using the content of the specification and drawings of the present invention, is included in the patent protection scope of the present invention.

Claims

1. The assembly structure of a compact speed reducer and an electromagnetic clutch, including a support shaft (7), is characterized in that It also includes a gearbox housing (2) and an armature (12); An external spline drive disk (14) and a planetary carrier (4) are rotatably mounted on the support shaft (7); A hollow external spline shaft (14a) is provided on the left end face of the external spline drive disk (14); Planetary gears (3) are mounted on the planetary carrier (4); The planetary gears (3) are meshed with the internal teeth of the right half section of the gearbox housing (2); A sun gear (6) is sleeved on the support shaft (7), the inner hole of the sun gear (6) is spaced from the support shaft (7), and the external teeth of the sun gear (6) are meshed with the planetary gears (3); A drive spline is provided on the inner hole of the sun gear (6); An internal spline gear ring (12a) is integrally formed on the left end face of the armature (12), and the external spline drive disk (14) is meshed with the internal spline gear ring (12a) to form a spline pair with axial sliding fit; An armature core yoke (10) is installed in the inner hole of the left half section of the gearbox housing (2), and a clutch armature (19) for generating electromagnetic suction for the armature (12) is installed on the armature core yoke (10); A contact drive member (13) is fixedly installed in the inner hole of the armature (12) for contact drive with the planetary carrier (4); A reset mechanism is provided between the external spline drive disk (14) and the contact drive member (13).

2. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 1, characterized in that, The reset mechanism includes a sleeve (15), a spring installation rod (16) and a return spring (17); The sleeve (15) is embedded in the external spline drive disk (14), and the sleeve (15) has a cavity with an open left end; The return spring (17) is sleeved on the spring installation rod (16), and the return spring (17) is arranged in the cavity of the sleeve (15); The right end of the spring installation rod (16) passes through the right side wall of the sleeve (15) and is connected to the contact drive member (13); The left end of the return spring (17) abuts against the stop head of the spring installation rod (16), and the right end abuts against the right side wall of the sleeve (15).

3. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 1, characterized in that The planetary carrier (4) includes a central sleeve (4a), a support disk (4b) and planetary gear installation rods (4c); The support disk (4b) is integrally formed on the outer peripheral surface of the right end of the central sleeve (4a); The planetary gear installation rods (4c) are integrally formed on the right end face of the support disk (4b).

4. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 3, characterized in that, The planetary gears (3) are installed on the planetary gear installation rods (4c) of the planetary carrier (4), and a first bearing (5) is provided between the planetary gears (3) and the planetary gear installation rods (4c).

5. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 3, characterized in that, The central sleeve (4a) of the planetary carrier (4) is sleeved on the support shaft (7), and two second bearings (8) are provided between the central sleeve (4a) and the support shaft (7).

6. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 3, characterized in that, A third bearing (9) is provided between the armature core yoke (10) and the outer peripheral surface of the left end of the central sleeve (4a).

7. The integrated structure of the compact speed reducer and the electromagnetic clutch according to claim 3, characterized in that, The contact transmission member (13) is a toothed disk, and transmission teeth are provided on the right end face of the toothed disk. Transmission teeth are also provided on the left end face of the central sleeve (4a). When the contact transmission member (13) contacts the central sleeve (4a), the transmission teeth of the two mesh with each other for transmission.

8. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 3, characterized in that The contact transmission member (13) is a friction disk. When the contact transmission member (13) contacts the central sleeve (4a), the two perform friction transmission.

9. The assembly structure of the compact speed reducer and electromagnetic clutch according to claim 1, characterized in that, An annular groove (10a) with an open left end is provided on the armature core yoke (10). The clutch armature (19) is installed in the annular groove (10a), and an armature sheath (18) is wrapped around the outside of the clutch armature (19).

10. The integrated structure of the compact speed reducer and the electromagnetic clutch according to claim 1, characterized in that, A end cover (1) is provided on the right end face of the gearbox housing (2); the external spline drive disk (14) is installed on the support shaft (7) through a fourth bearing (11).

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