Motor overload protection device, harvester unloading mechanism and harvester

Abstract

The utility model relates to the field of agricultural machinery, in particular to a motor overload protection device, a harvester unloading mechanism and a harvester, a tooth pad assembly, a shaft sleeve and an elastic piece are sequentially arranged on a motor shaft and between a matched gear and a radial extension portion from front to back, and the tooth pad assembly and the shaft sleeve are respectively sleeved on the motor shaft. The shaft sleeve is connected with the motor shaft through a spline; a limiting structure for axially limiting the matched gear is arranged on the motor shaft; the tooth pad assembly comprises a first gear ring and a second gear ring which are connected in a meshed mode, the first gear ring is connected with the matched gear, and the second gear ring is connected with the shaft sleeve. When the grain unloading motor is instantaneously overloaded, the connection between the motor shaft and the matched gear is cut off, and the connection between the motor and the matched gear is manually recovered after the problem is solved through adjustment, so that the fault waiting time in the working process of a user is shortened, and the working efficiency of the user is improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, specifically to a motor overload protection device, a harvester unloading mechanism, and a harvester. Background Technology

[0002] With the continuous advancement of agricultural mechanization, large agricultural equipment such as combine harvesters have been widely used in agricultural production. As a crucial component of the combine harvester, the grain unloading system or mechanism directly affects the efficiency and continuity of harvesting operations. In existing technologies, grain unloading systems typically employ a motor-driven mechanism. The motor's rotating shaft (i.e., the motor shaft) drives a matching gear, which in turn drives the unloading drum to rotate, thus unloading the grain.

[0003] Specifically, existing grain unloading systems typically include key components such as a grain unloading motor, matching gears, a key, and a grain unloading cylinder gear ring. The rotating shaft of the grain unloading motor is locked to the matching gear via a key, and the matching gear meshes with the grain unloading cylinder gear ring. When the motor starts, the rotating shaft drives the matching gear to rotate, which in turn drives the grain unloading cylinder to rotate, completing the grain unloading process. However, in actual operation, the grain unloading cylinder may encounter various abnormal conditions such as bumps, jamming, and collisions. These conditions may cause momentary translation between the grain unloading motor shaft and the matching gear. This translation can break the key, causing the grain unloading system to malfunction, resulting in user problems and severely impacting user work efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a motor overload protection device that can disconnect the motor shaft from the matching gear when the unloading motor experiences a momentary overload. After the problem is resolved, the connection between the motor and the matching gear can be manually restored, thereby reducing the user's downtime and improving work efficiency.

[0005] Another objective of this invention is to provide a harvester unloading mechanism that can disconnect the motor shaft from the matching gear when the unloading motor experiences a momentary overload. After the problem is resolved, the connection between the motor and the matching gear can be manually restored, thereby reducing the user's downtime and improving work efficiency.

[0006] Another objective of this invention is to provide a harvester that can disconnect the connection between the motor shaft and the matching gear when the unloading motor experiences a momentary overload. After the problem is resolved, the connection between the motor and the matching gear can be manually restored, thereby reducing the user's downtime and improving work efficiency.

[0007] The technical solution of this utility model is implemented as follows:

[0008] An overload protection device for a motor includes a matching gear loosely fitted on the motor shaft. A radial extension is provided at one end of the motor shaft near the motor body. The front end of the motor shaft is defined as forward and the rear end as backward. A toothed pad assembly, a bushing, and an elastic element are arranged sequentially from front to back on the motor shaft and between the matching gear and the radial extension. The toothed pad assembly and the bushing are respectively fitted on the motor shaft, and the bushing is connected to the motor shaft by a spline.

[0009] The motor shaft is equipped with a limiting structure for axially limiting the matching gear;

[0010] The toothed pad assembly includes a first toothed ring and a second toothed ring that are meshed together, wherein the first toothed ring is connected to a matching gear, and the second toothed ring is connected to the bushing.

[0011] Furthermore, the elastic element is a spring, and a spring retaining ring is provided at the rear end of the spring, and the spring retaining ring is fitted onto the motor shaft.

[0012] Furthermore, the spring is in a natural or partially compressed state, and the spring retainer is in contact with the radial extension.

[0013] Furthermore, the spring is a compression spring.

[0014] Furthermore, the first gear ring and the second gear ring are respectively provided with meshing tooth profile structures.

[0015] Furthermore, the protrusion and the sleeve are connected by an interference fit or by a thread.

[0016] The limiting structure includes a locking nut and a washer. The locking nut is installed on the side of the matching gear away from the toothed gear assembly, and the washer is installed between the locking nut and the matching gear.

[0017] Furthermore, a plurality of retaining posts are provided on the side of the first gear ring near the matching gear, and a plurality of retaining slots are correspondingly opened on the side of the matching gear near the first gear ring, with the retaining posts being assembled in the retaining slots.

[0018] Furthermore, the plurality of the retaining posts are evenly arranged around the central axis of the first gear ring.

[0019] A harvester unloading mechanism includes a motor, a matching gear, and an unloading cylinder. It also includes the motor overload protection device, which is mounted on the motor shaft and located between the matching gear and a radial extension. The matching gear is meshed with a gear ring on the unloading cylinder.

[0020] A harvester, including the aforementioned harvester unloading mechanism.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This application provides an overload protection device for a motor. When the motor is working normally, the elastic element is in its natural state. The motor shaft can be meshed with the gear ring on the external unloading cylinder through the elastic element, bushing, gear pad assembly, and matching gear. The motor shaft indirectly drives the operation of the unloading cylinder. When the unloading motor experiences a momentary overload, the torque of the external unloading cylinder exceeds the compression force of the elastic element. The elastic element is compressed, and the first gear ring and the second gear ring are disengaged through the compression of the elastic element, disconnecting the connection between the motor, the matching gear, and the external unloading cylinder. Only after the overload condition is eliminated through maintenance can the first gear ring and the second gear ring re-engage, reconnecting the motor, the matching gear, and the external unloading cylinder for transmission.

[0023] The motor overload protection device can disconnect the motor shaft from the matching gear when the unloading motor experiences a momentary overload. After the problem is resolved, the connection between the motor and the matching gear can be manually restored, thereby reducing the user's downtime and improving work efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the motor overload protection device installed on the motor shaft of the motor of this utility model;

[0026] Figure 2 This is a cross-sectional view of the motor overload protection device of this utility model.

[0027] In the picture:

[0028] 1-Motor; 101-Motor shaft; 102-Radial extension;

[0029] 2-Spring retaining ring; 3-Spring;

[0030] 4-First gear ring; 401-Clamping post;

[0031] 5-Second gear ring;

[0032] 6-Shaft sleeve;

[0033] 7-Matching gear; 701-Card slot;

[0034] 8-Locking nut; 9-Washer. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] Example 1

[0043] Reference Figures 1-2 This embodiment provides a motor overload protection device. A matching gear 7 is loosely fitted onto the motor shaft 101 of the motor 1. A radial extension 102 is provided at one end of the motor shaft 101 near the motor body. The radial extension 102 and the motor shaft 101 are integrally formed. A toothed pad assembly, a bushing 6, and an elastic element are sequentially arranged on the motor shaft 101, between the matching gear 7 and the radial extension 102. That is, the toothed pad assembly, bushing 6, and elastic element are sequentially arranged between the matching gear 7 and the radial extension 102, and the toothed pad assembly, bushing 6, and elastic element are all fitted onto the outside of the motor shaft 101. The bushing 6 is connected to the motor shaft 101 by a spline, and the toothed pad assembly is connected to the bushing 6 and can rotate synchronously.

[0044] For ease of explanation, the front and rear directions of the motor shaft 101 are defined as the front direction and the rear direction as the rear direction.

[0045] The motor shaft 101 is provided with a limiting structure for axially limiting the matching gear 7. This limiting structure mainly prevents the matching gear 7 from moving forward laterally.

[0046] Note that the limiting structure may also include a stop. A stop is set on the motor shaft 101 and on the right side of the matching gear 7. The stop prevents the matching gear 7 from moving to the right, and the limiting structure achieves axial limiting of the matching gear 7.

[0047] The toothed pad assembly includes a first toothed ring 4 and a second toothed ring 5 that are meshed together. The second toothed ring 5 is connected to the bushing 6 and can rotate synchronously. The first toothed ring 4 is connected to the motor shaft 101 by a key and is also connected to a matching gear 7 and can rotate synchronously.

[0048] An elastic element is provided between the bushing 6 and the radial extension 102. The elastic element can be made of elastic rubber or spring 3. The elastic element can be compressed so that the first gear ring 4 and the second gear ring 5 in the toothed pad assembly can be in a disengaged state or a partially engaged state. Thus, when the motor shaft 101 and the bushing 6 rotate synchronously, the second gear ring 5 rotates with the bushing 6, while the first gear ring 4 does not rotate. In this way, the second gear ring 5 is in a slipping state relative to the first gear ring 4, and thus cannot drive the rotation of the matching gear 7 and the unloading cylinder, thereby realizing the disengagement of the transmission between the unloading cylinder and the motor shaft 101.

[0049] Preferably, the elastic element is a spring 3, which can be a compression spring 3. A spring retaining ring 2 is provided at the rear end of the spring 3, and the spring retaining ring 2 is fitted on the motor shaft 101, with the spring retaining ring 2 located between the spring 3 and the radial extension 102. During normal operation, the spring 3 is in its natural state or in a partially compressed state (partial compression state: that is, the spring 3 is compressed to a certain amount but not in a fully compressed state). The motor shaft 101 rotates and forms a meshing connection with the gear ring on the external grain unloading cylinder through the bushing 6, the gear pad assembly, and the matching gear 7. Therefore, under normal operating conditions, the motor 1 can indirectly drive the operation of the grain unloading cylinder through the motor shaft 101 and the motor overload protection device.

[0050] The first toothed ring 4 and the second toothed ring 5 are respectively provided with annular toothed structures that can mesh with each other. The first toothed ring 4 is located at the front end of the second toothed ring 5, and the toothed structure of the first toothed ring 4 meshes with the toothed structure of the second toothed ring 5.

[0051] The first gear ring 4 is connected to the matching gear 7. Specifically, multiple retaining posts 401 are provided on the side of the first gear ring 4 near the matching gear 7 (i.e., the front side of the first gear ring 4), and multiple retaining slots 701 are correspondingly provided on the side of the matching gear 7 near the first gear ring 4 (i.e., the rear side of the matching gear 7). The retaining posts 401 are assembled in the retaining slots 701. The connection between the matching gear 7 and the first gear ring 4 is realized by the multiple retaining posts 401 respectively engaging in the retaining slots 701. When the motor shaft 101 and the gear pad assembly rotate, the first gear ring 4 can drive the rotation of the matching gear 7 through the multiple retaining posts 401.

[0052] Preferably, a plurality of the retaining posts 401 are evenly arranged around the central axis of the first gear ring 4, and a plurality of retaining slots 701 are evenly opened around the central axis of the matching gear 7, and the retaining slots 701 and retaining posts 401 are arranged in a one-to-one correspondence. After the retaining posts 401 are assembled into the retaining slots 701, the outer wall of the retaining posts 401 and the inner wall of the retaining slots 701 are correspondingly fitted.

[0053] In this embodiment, the limiting structure includes a locking nut 8 and a washer 9. The locking nut 8 is installed on the motor shaft 101 and on the side of the matching gear 7 away from the tooth pad assembly (i.e., the front side of the matching gear 7). The locking nut 8 is threadedly connected to the motor shaft 101 and abuts against the matching gear 7. The washer 9 is installed between the locking nut 8 and the matching gear 7 to increase the contact area with the matching gear 7 and protect the surface of the matching gear 7.

[0054] This application provides a motor overload protection device. When the motor 1 and the entire transmission system are working normally, the spring 3 is in a natural or partially compressed state. The spring 3 acts to press the second gear ring 5, so that the second gear ring 5 meshes with the first gear ring 4. Then, the rotation of the motor shaft 101 can form a meshing connection with the gear ring on the external unloading cylinder through the bushing 6, the gear pad assembly, and the matching gear 7. Therefore, the motor shaft 101 indirectly drives the operation of the unloading cylinder. When the unloading motor 1 experiences a momentary overload, the torque of the external unloading cylinder is too large. When the motor shaft 101 rotates, the second gear ring 5 tends to disengage from the first gear ring 4. As the motor shaft continues to rotate, the second gear ring 5 slips and then disengages from the first gear ring 4. In a partially engaged state, although the second gear ring 5 and the first gear ring 4 are in contact, it is insufficient to drive the first gear ring 4 to rotate. Therefore, the second gear ring 5 rotates alone and cannot drive the first gear ring 4 to rotate. During the process of the second gear ring 5 disengaging from the first gear ring 4 and slipping, the second gear ring 5 will move backward and away from the first gear ring 4, which will cause the spring 3 to be further compressed. After the transmission between the first gear ring 4 and the second gear ring 5 reaches the disengaged state, the transmission between the second gear ring 5 and the first gear ring 4 is disconnected, thereby disconnecting the connection between the motor 1 and the matching gear 7 and the external grain unloading cylinder. Only after the overload condition is eliminated through maintenance can the first gear ring 4 and the second gear ring 5 re-engage, reconnecting the motor 1 with the matching gear 7 and the external grain unloading cylinder.

[0055] The motor overload protection device can disconnect the transmission between the second gear ring 5 and the first gear ring 4 when the unloading motor 1 experiences a momentary overload, thereby cutting off the transmission between the motor shaft 101 and the matching gear 7. After the problem is resolved, the first gear ring 4 and the second gear ring 5 can be manually re-engaged, thereby restoring the connection between the motor 1 and the matching gear 7. This reduces the user's downtime during operation and improves the user's work efficiency.

[0056] Example 2

[0057] Reference Figures 1-2A harvester unloading mechanism includes a motor 1, a matching gear 7, and a unloading cylinder. It also includes the motor overload protection device. The motor overload protection device is installed on the motor shaft 101 of the motor 1 and is located between the matching gear 7 and the radial extension 102. The matching gear 7 is meshed with the gear ring on the unloading cylinder.

[0058] A toothed pad assembly, a bushing 6, and an elastic element are sequentially arranged on the motor shaft 101 and between the matching gear 7 and the radial extension 102. The elastic element is a spring 3.

[0059] When motor 1 and the entire transmission system are working normally, spring 3 is in its natural or partially compressed state. The rotation of motor shaft 101 can form a meshing connection with the gear ring on the external unloading cylinder through bushing 6, gear pad assembly, and matching gear 7. Therefore, the unloading cylinder is indirectly driven by motor shaft 101. When unloading motor 1 experiences a momentary overload, the torque of the external unloading cylinder is too large. When motor shaft 101 rotates, the second gear ring 5 and the first gear ring 4 will slip. That is, the second gear ring 5 will disengage from the first gear ring 4 and be in a partially meshed state. The second gear ring 5 rotates alone and cannot drive the unloading cylinder. As the first gear ring 4 rotates, and the second gear ring 5 disengages from the first gear ring 4 and slips, the second gear ring 5 will move backward and away from the first gear ring 4, which will cause the spring 3 to be further compressed. After the transmission between the first gear ring 4 and the second gear ring 5 reaches the disengagement state, the transmission between the second gear ring 5 and the first gear ring 4 is disconnected, thereby disconnecting the connection between the motor 1 and the matching gear 7 and the external grain unloading cylinder. Only after the overload condition is eliminated through maintenance can the first gear ring 4 and the second gear ring 5 re-engage, reconnecting the motor 1 with the matching gear 7 and the external grain unloading cylinder.

[0060] Example 3

[0061] A harvester, including the aforementioned harvester unloading mechanism.

[0062] The beneficial effects of the technical solution of this utility model are:

[0063] The motor overload protection device can automatically disconnect the connection between the motor shaft 101 and the matching gear 7 when the unloading motor 1 experiences a momentary overload. After the problem is resolved, the connection between the motor 1 and the matching gear 7 can be manually restored, thereby reducing the user's downtime and improving work efficiency.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

[0065] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor overload protection device, wherein a matching gear (7) is loosely fitted on the motor shaft (101) of a motor (1), and a radial extension (102) is provided at one end of the motor shaft (101) near the motor body, and the front end of the motor shaft (101) is defined as forward and the rear end as backward, characterized in that, A toothed pad assembly, a bushing (6) and an elastic element are arranged sequentially from front to back on the motor shaft (101) and between the matching gear (7) and the radial extension (102). The toothed pad assembly and the bushing (6) are respectively fitted on the motor shaft (101), and the bushing (6) is connected to the motor shaft (101) by a spline. The motor shaft (101) is provided with a limiting structure for axially limiting the matching gear (7); The toothed pad assembly includes a first toothed ring (4) and a second toothed ring (5) that mesh with each other, wherein the first toothed ring (4) is connected to a matching gear (7), and the second toothed ring (5) is connected to the bushing (6).

2. The motor overload protection device of claim 1, wherein, The elastic element is a spring (3), and a spring retainer (2) is provided at the rear end of the spring (3), and the spring retainer (2) is fitted on the motor shaft (101).

3. An electrical machine overload protection device according to claim 2, characterised in that, The spring (3) is in a natural or partially compressed state, and the spring retainer (2) is in contact with the radial extension (102).

4. The motor overload protection device of claim 2, wherein, The spring (3) is a compression spring (3).

5. The motor overload protection device according to claim 4, characterized in that, The first gear ring (4) and the second gear ring (5) are respectively provided with tooth-shaped structures that can mesh with each other.

6. The motor overload protection device of claim 5, wherein, The limiting structure includes a locking nut (8) and a washer (9). The locking nut (8) is installed on the side of the matching gear (7) away from the toothed assembly, and the washer (9) is installed between the locking nut (8) and the matching gear (7).

7. The motor overload protection device of claim 1, wherein Multiple locking posts (401) are provided on the side of the first gear ring (4) near the matching gear (7), and multiple locking slots (701) are correspondingly opened on the side of the matching gear (7) near the first gear ring (4), and the locking posts (401) are assembled in the locking slots (701).

8. The motor overload protection device of claim 7, wherein, The plurality of the retaining pins (401) are evenly arranged around the central axis of the first toothed ring (4).

9. A grain unloading mechanism for a harvester, comprising: The device includes a motor (1), a matching gear (7), and a grain unloading drum, and also includes a motor overload protection device as described in any one of claims 1-8. The motor overload protection device is installed on the motor shaft (101) of the motor (1), and the motor overload protection device is located between the matching gear (7) and the radial extension (102). The matching gear (7) is meshed with the gear ring on the grain unloading drum.

10. A harvester characterized by Includes the harvester unloading mechanism as described in claim 9.

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