Agricultural generator

Abstract

The utility model discloses an agricultural generator, which belongs to the technical field of generators and comprises a front end cover, a rear end cover, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are mounted in a space formed by the front end cover and the rear end cover, a rectifier bridge, a regulator and a rear shield are mounted on the rear end face of the rear end cover, and the rear shield comprises an axial end face and a circumferential end face which are connected into a whole. The axial end face comprises an axial ventilation face arranged above the rectifier bridge, the axial ventilation face is of a frame structure with a plurality of upper ventilation holes, and a metal woven mesh is embedded in the upper ventilation holes. The axial end face and the circumferential end face which are located above and on the side face of the regulator form a surrounding structure which covers the regulator, the rear shield can integrally surround the regulator and the rectifier bridge in the shield, and sundries with the size larger than 2.5 mm are prevented from entering the motor from the axial ventilation face, the gap between the regulator and the rear end cover and the gap between the rectifier bridge and the rear shield. Objects are prevented from being accumulated in the shield to block ventilation holes, so that the maintenance frequency of the motor is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of generators, and in particular relates to an agricultural generator. Background Art

[0002] The current motor rear shield structure design is suitable for non-agricultural applications. After the rear shield 9 is fastened to the regulator 7 and the rectifier bridge 5 by the combination of bolts and nuts, it blocks the regulator 7 and the rectifier bridge 5 to prevent external objects from damaging the rectifier bridge 5 diode and the regulator 7. Figure 1 The head of the rear shield 9 is surrounded by a fence-type ventilation hole, and the upper part is designed with elliptical, fan-shaped and semicircular ventilation holes. When the motor is working, wind can enter the motor through the ventilation holes of the rear shield 9, the gap between the regulator 7 and the rear end cover 2, and the gap between the rectifier bridge 5 and the rear shield 9 to help the motor to dissipate heat.

[0003] The existing rear guard 9 can achieve the IP2X dustproof level to prevent objects of 12.5 mm from entering, but cannot achieve the IP3X protection level to prevent objects larger than 2.5 mm from entering. When the current motor rear guard 9 structural design is applied in agricultural machinery scenarios, the wind passes through the ventilation holes, the gap between the regulator 7 and the rear end cover 2, and the gap between the rectifier bridge 5 and the rear guard 9. While helping the motor to dissipate heat, it is easy to carry straw and other debris in the agricultural machinery scenario into the inside of the guard. The entry of debris causes the ventilation holes of the motor to be filled and blocked, reducing the heat dissipation capacity. In addition, because the rear guard 9 is fastened above the rectifier bridge 5 and the regulator 7 by the cooperation of bolts and nuts, when straw and other debris block the ventilation holes, the rear guard 9 must be removed before cleaning, which will increase the difficulty of maintenance for customers. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an agricultural generator, which can improve the protection level of the rear shield, prevent straw and other debris from entering the rear shield, and objects from accumulating inside the rear shield to block the ventilation holes and reduce the heat dissipation capacity, thereby reducing the frequency of motor maintenance.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] An agricultural generator comprises a front end cover, a rear end cover, and a stator assembly and a rotor assembly installed in a space formed by the front end cover and the rear end cover, a rectifier bridge, a regulator and a rear shield are installed on the rear end face of the rear end cover, the rear shield comprises an axial end face and a circumferential end face connected as one body, the axial end face comprises an axial ventilation face arranged above the rectifier bridge, the axial ventilation face is a frame structure with a plurality of upper ventilation holes, and a metal woven mesh is embedded in the upper ventilation holes; the axial end face and the circumferential end face located above and on the side of the regulator constitute an enclosing structure in which the regulator cover is arranged.

[0007] Furthermore, a terminal avoidance hole is provided on the enclosing structure, and the output terminal of the regulator extends out from the terminal avoidance hole.

[0008] Furthermore, the terminal avoidance hole is formed by connecting the openings on the axial end surface and the circumferential end surface.

[0009] Furthermore, an output limiting structure is connected between the axial ventilation surface and the axial surface of the surrounding structure, and a middle ventilation surface is provided at the center of the rear shield on the axial ventilation surface, and the middle ventilation surface is a semicircular structure connected to the output limiting structure.

[0010] Furthermore, the middle ventilation surface is higher than the axial ventilation surface and is flush with the upper surface of the output limiting structure.

[0011] Furthermore, a circumferential ventilation surface is arranged on the circumferential end surface, and the circumferential ventilation surface is a frame structure with a plurality of side ventilation holes, and a metal woven mesh is embedded in the side ventilation holes.

[0012] Furthermore, the circumferential ventilation surface extends from a radial position at one end of the rectifier bridge through the regulator to a radial position at the other end of the rectifier bridge.

[0013] Furthermore, a fixing portion for fixing the agricultural generator to the entire vehicle is provided on a side of the rear end cover close to the rectifier bridge, and a side of the circumferential end surface close to the fixing portion is an airtight wall surface.

[0014] Furthermore, the wall surface away from the lower edge of the rectifier bridge is closely fitted with the end surface of the fixing portion.

[0015] Furthermore, the front end cover and the rear end cover are fixed by two fastening bolts, and the circumferential end surface and the fastening bolts are recessed inwardly at the same axial position to form two axial avoidance grooves, and the wall surface and the circumferential ventilation surface are respectively arranged on both sides of the avoidance groove.

[0016] After adopting the above technical solution, the beneficial effects of the utility model are:

[0017] Since the agricultural generator of the utility model includes a front cover, a rear cover, and a stator assembly and a rotor assembly installed in a space formed by the front cover and the rear cover, a rectifier bridge, a regulator and a rear shield are installed on the rear end face of the rear cover, and the rear shield includes an axial end face and a circumferential end face connected as one body, the axial end face includes an axial ventilation face arranged above the rectifier bridge, the axial ventilation face is a frame structure with a plurality of upper ventilation holes, and a metal woven mesh is embedded in the upper ventilation holes; the axial end face and the circumferential end face located above and on the side of the regulator constitute an enclosing structure in which the regulator cover is arranged, and the rear shield can enclose the regulator and the rectifier bridge as a whole in the protective interior of the shield, preventing objects, especially debris larger than 2.5 mm, from entering the interior of the motor from the axial ventilation face, the gap between the regulator and the rear cover, and the gap between the rectifier bridge and the rear shield, thereby achieving an IP3X protection level, avoiding objects from accumulating inside the shield to block the ventilation holes, thereby reducing the frequency of motor maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a generator in the prior art;

[0019] Figure 2 It is a structural schematic diagram of the utility model agricultural generator;

[0020] Figure 3 It is a schematic diagram of the structure of the rear shield;

[0021] In the figure, 1-front end cover, 2-rear end cover, 3-fixing part, 4-fastening bolt, 5-rectifier bridge, 6-stud, 7-regulator, 8-output terminal, 9-rear shield, 10-axial end surface, 11-axial ventilation surface, 12-enclosing structure, 13-terminal avoidance hole, 14-middle ventilation surface, 15-output limiting structure, 16-through hole, 17-limiting groove, 18-circumferential end surface, 19-circumferential ventilation surface, 20-wall surface, 21-avoidance groove. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0023] like Figure 2 and Figure 3As shown together, an agricultural generator includes a front cover 1, a rear cover 2, and a stator assembly and a rotor assembly installed in a space formed by the front cover 1 and the rear cover 2. The rear end face of the rear cover 2 is installed with a rectifier bridge 5, a regulator 7 and a rear shield 9. The rear shield 9 includes an axial end face 10 and a circumferential end face 18 connected as one body. The rear shield 9 is fixed to the upper end face of the rectifier bridge by bolts passing through the axial end face 10.

[0024] The axial end surface 10 includes an axial ventilation surface 11 disposed above the rectifier bridge 5. The axial ventilation surface 11 is a frame structure with a plurality of upper ventilation holes. The upper ventilation holes are embedded with a metal woven mesh. The woven mesh can shrink the pores to a very small size and has no effect on ventilation. The axial ventilation surface 11 covers the internal rectifier bridge 5, prevents tiny debris from entering the shield from the upper ventilation holes, and blocks the ventilation pores, thereby ensuring the heat dissipation effect of the generator, with low cost and easy processing.

[0025] The axial end face 10 and the circumferential end face 18 located above and on the side of the regulator 7 form an enclosure structure 12 that covers the regulator 7. The gap between the regulator 7 and the rear end cover 2 is protected to prevent foreign matter from entering the generator through the gap. Among them, the output terminal 8 of the regulator 7 includes an L terminal for inputting a phase terminal signal and an L terminal for outputting a warning signal. A terminal avoidance hole 13 is opened on the enclosure structure 12, and the output terminal 8 of the regulator 7 extends out from the terminal avoidance hole 13. Specifically, the terminal avoidance hole 13 is formed by connecting the openings on the axial end face 10 and the circumferential end face 18.

[0026] like Figure 2 and Figure 3 As shown together, an output limiting structure 15 is connected between the axial ventilation surface 11 and the axial surface of the surrounding structure 12. Two through holes 16 are opened on the output limiting structure 15. Two studs 6 of the rectifier bridge 5 for outputting electric energy extend out from the two through holes 16 respectively. Limiting grooves 17 are respectively arranged on the sides of the two through holes 16. The wiring fixed to the studs 6 is limited in the limiting grooves 17 and cannot rotate.

[0027] The axial ventilation surface 11 is located at the center of the rear shield 9 and a middle ventilation surface 14 is provided. The middle ventilation surface 14 is a semicircular structure connected to the output limiting structure 15. Below the middle ventilation surface 14 is the end of the rotor shaft, where a slip ring sealing sleeve is provided. The middle ventilation surface 14 is also a frame structure with a metal woven mesh embedded therein, which can cover the slip ring sealing sleeve below to prevent debris from entering the generator from here.

[0028] The end of the rotor shaft is higher than the upper surface of the rectifier bridge 5, so in this embodiment, the middle ventilation surface 14 is higher than the axial ventilation surface 11 to avoid interference with the rotor shaft. Specifically, the upper surface of the middle ventilation surface 14 is flush with the upper surface of the output limit structure 15, which is more beautiful and easy to process.

[0029] like Figure 2 and Figure 3 As shown in common, a circumferential ventilation surface 19 is provided on the circumferential end surface 18. The circumferential ventilation surface 19 is a frame structure with multiple side ventilation holes, and a metal woven mesh is embedded in the side ventilation holes. Specifically, the circumferential ventilation surface 19 extends from the radial position of one end of the rectifier bridge 5 through the regulator 7 to the radial position of the other end of the rectifier bridge 5, which can protect the air inlet on the side of the rear end cover 2 of the generator. Among them, the metal woven mesh of the upper ventilation holes and the side ventilation holes are both made of metal woven mesh with a mesh number greater than or equal to 304 meshes to prevent the entry of foreign objects larger than 2.5mm.

[0030] like Figure 2 As shown, a fixing part 3 for fixing the agricultural generator to the vehicle is provided on the side of the rear end cover 2 close to the rectifier bridge 5, and an airtight wall 20 is provided on the side of the circumferential end surface 18 close to the fixing part 3, which can ensure the strength of the structure here. The lower edge of the wall 20 away from the rectifier bridge 5 is closely attached to the end surface of the fixing part 3, and there is no gap between the rectifier bridge 5 and the rear shield 9 here, thereby preventing straw and other debris from entering the generator.

[0031] The front cover 1 and the rear cover 2 are fixed by two fastening bolts 4. The circumferential end surface 18 and the fastening bolts 4 are recessed inwards at the same axial position to form two axial avoidance grooves 21. The avoidance grooves 21 can avoid the test tooling. The wall surface 20 and the circumferential ventilation surface 19 are respectively arranged on both sides of the avoidance groove 21 for easy processing.

[0032] The agricultural generator of the utility model is provided with a rear shield including an axial end face and a circumferential end face. The axial ventilation surface on the axial end face is a frame structure with a plurality of upper ventilation holes. A metal woven mesh is embedded in the upper ventilation holes. The axial end face and the circumferential end face located above and on the side of the regulator form an enclosing structure in which the regulator cover is arranged. The rear shield can surround the regulator and the rectifier bridge as a whole in the protective interior of the shield, preventing debris, especially debris larger than 2.5 mm, from entering the interior of the motor, avoiding objects from accumulating inside the shield to block the ventilation gaps, thereby reducing the frequency of motor maintenance.

[0033] In the description of this specification, it is necessary to understand that the description involving orientation, such as up, down, front, back, etc., the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0034] In the description of this specification, unless otherwise clearly defined, words such as "setting", "installation", and "connection" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in this utility model based on the specific content of the technical solution.

[0035] Although the specific implementation methods of the utility model are described above, those skilled in the art should understand that the described embodiments are only part of the implementation methods of the utility model, rather than all the implementation methods, which are only examples, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these implementation methods without departing from the principle and essence of the utility model and without any creative work, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. An agricultural generator, comprising a front cover (1), a rear cover (2), and a stator assembly and a rotor assembly installed in a space formed by the front cover (1) and the rear cover (2), wherein a rectifier bridge (5), a regulator (7) and a rear shield (9) are installed on the rear end surface of the rear cover (2), characterized in that: The rear shield (9) comprises an axial end face (10) and a circumferential end face (18) connected as one body, the axial end face (10) comprising an axial ventilation face (11) arranged above the rectifier bridge (5), the axial ventilation face (11) being a frame structure having a plurality of upper ventilation holes, wherein the upper ventilation holes are embedded with a metal braided mesh; the axial end face (10) and the circumferential end face (18) located above and on the side of the regulator (7) form an enclosing structure (12) that encloses the regulator (7).

2. The agricultural generator according to claim 1, characterized in that: A terminal avoidance hole (13) is provided on the surrounding structure (12), and an output terminal (8) of the regulator (7) extends out from the terminal avoidance hole (13).

3. The agricultural generator according to claim 2, characterized in that: The terminal avoidance hole (13) is formed by connecting the openings on the axial end surface (10) and the circumferential end surface (18).

4. The agricultural generator according to claim 1, characterized in that: An output limiting structure (15) is connected between the axial ventilation surface (11) and the axial surface of the surrounding structure (12); a middle ventilation surface (14) is provided at a position of the axial ventilation surface (11) located at the center of the rear shield (9); and the middle ventilation surface (14) is a semicircular structure connected to the output limiting structure (15).

5. The agricultural generator according to claim 4, characterized in that: The middle ventilation surface (14) is higher than the axial ventilation surface (11) and is flush with the upper surface of the output limiting structure (15).

6. The agricultural generator according to any one of claims 1 to 5, characterized in that: A circumferential ventilation surface (19) is arranged on the circumferential end surface (18), and the circumferential ventilation surface (19) is a frame structure with a plurality of side ventilation holes, and a metal braided mesh is embedded in the side ventilation holes.

7. The agricultural generator according to claim 6, characterized in that: The circumferential ventilation surface (19) extends from a radial position at one end of the rectifier bridge (5) through the regulator (7) to a radial position at the other end of the rectifier bridge (5).

8. The agricultural generator according to claim 7, characterized in that: A fixing portion (3) for fixing the agricultural generator to the whole vehicle is provided on one side of the rear end cover (2) close to the rectifier bridge (5), and a side of the circumferential end surface (18) close to the fixing portion (3) is an airtight wall surface (20).

9. The agricultural generator according to claim 8, characterized in that: The lower edge of the wall surface (20) away from the rectifier bridge (5) is tightly fitted to the end surface of the fixing portion (3).

10. The agricultural generator according to claim 9, characterized in that: The front end cover (1) and the rear end cover (2) are fixed by two fastening bolts (4); the circumferential end surface (18) and the position on the same axial direction as the fastening bolts (4) are recessed inward to form two axial avoidance grooves (21); the wall surface (20) and the circumferential ventilation surface (19) are respectively arranged on both sides of the avoidance groove (21).

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