A gear box suitable for use in a pulverizing mechanism and a harvester

Abstract

The utility model discloses a gear transmission case suitable for smashing mechanism and harvester belongs to agricultural equipment field, include: input shaft subassembly, bag input shaft and input gear, safety clutch, set up at input shaft and input gear junction, including the casing of axial connection on input gear, the initiative core body of built -in in casing, set up in several spring subassembly in initiative core body, place on several spring subassembly slide pin, the sealing ring of casing in initiative core body end, set up in the support ring of sealing ring one side, the baffle ring of fixed in casing end portion and with support ring abut, the input shaft one end is connected with power component, and the other end is inserted with initiative core body, and initiative core body is passed through the key groove of inside setting and is connected with input shaft key, input gear passes through the key connection and transmits the torque to input shaft, the utility model sets up and sends out the sound to remind the operator to cut off power when built -in safety clutch of the utility model at input shaft and input gear torque overload.

Description

Technical Field

[0001] This utility model relates to a gear transmission box and harvester suitable for crushing mechanisms, belonging to the field of agricultural equipment technology. Background Technology

[0002] The shredding mechanism of the header shreds straw by high-speed rotating blades. When encountering stones, metal foreign objects, or crop blockages, it is prone to jamming of the blade shaft, damage to transmission components, or even engine stalling. Existing overload protection methods for the shredding mechanism include: (1) providing fracture protection under overload through safety bolts; (2) installing a safety clutch on the outside of the transmission shaft. Existing overload protection has the following problems: First, replacing safety bolts is time-consuming and often requires spare parts; second, the external safety clutch is far from the shredding blade shaft, resulting in insensitive overload response, large space occupation, and response delay.

[0003] Secondly, the external safety clutch is mounted on the power transmission shaft of the header, and when transmitting power, it drives the header's harvesting and crushing mechanisms to return the material to the field through the transmission mechanism. In terms of structural layout, the external safety clutch lacks a compact integrated design, which affects the flexibility of the header layout. In addition, the lack of lubrication or grease lubrication increases friction loss, has poor heat dissipation capacity, and a relatively short service life.

[0004] In practical applications, since most harvesters work outdoors in the fields and are affected by harsh weather, the external safety clutches suffer from aging and corrosion after long-term use. During operation, the external safety clutches are often jammed by weeds, which shortens their service life. Furthermore, maintenance of the external safety clutches requires disassembling the entire transmission chain, resulting in high maintenance costs. Therefore, the existing overload protection of the header crushing mechanism has many problems. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to overcome the shortcomings of the prior art and provide a gear transmission box and harvester suitable for crushing mechanism. By setting a safety clutch at the connection between the input shaft and the input gear inside the gear transmission box, an audible alarm can be emitted to remind the operator to cut off the power when the torque of the input shaft and the input gear is overloaded. Moreover, the built-in design can reasonably adapt to different field working environments and make reasonable use of the internal space of the gear transmission box.

[0006] To solve the above-mentioned technical problems, this utility model is implemented using the following technical solution:

[0007] In a first aspect, this utility model provides a gear transmission box suitable for a crushing mechanism, comprising:

[0008] An input shaft assembly, which is connected to the power assembly and located inside the gearbox, includes an input shaft inserted into the gearbox and an input gear mounted on the input shaft;

[0009] A safety clutch is located at the connection between the input shaft and the input gear, including a housing axially connected to the input gear, a drive core built into the housing, several spring assemblies located in the drive core, a sliding pin placed on the several spring assemblies, a sealing ring fitted on the end of the drive core, a support ring located on one side of the sealing ring, and a retaining ring fixed to the end of the housing and abutting against the support ring.

[0010] One end of the input shaft is connected to the power assembly, and the other end is inserted into the drive core. The drive core is connected to the input shaft key via an internal keyway.

[0011] The input gear is connected to the input shaft via a key to the drive core, transmitting torque to the input shaft. When the torque exceeds the range of the spring assembly, the drive pin continuously impacts the housing to produce a sound, reminding the operator to cut off the power.

[0012] Optionally, the outer surface of the active core is provided with a plurality of spring holes, which are arranged radially along the surface of the active core;

[0013] Each of the aforementioned spring assemblies includes a small spring installed in a spring hole and a large spring fitted around the outside of the small spring;

[0014] The number of the spring assemblies is the same as the number of sliding pins.

[0015] Optionally, the sliding pin is engaged with one end of the spring assembly near the housing and slidably connected to the spring hole.

[0016] Optionally, the gearbox further includes an output shaft assembly, comprising an output gear meshing with the input gear, an output shaft inserted into the output gear, and a bearing assembly mounted on the output shaft and placed inside the gearbox.

[0017] The output shaft passes through one end of the gearbox and is connected to the crushing mechanism to transmit power to the crushing mechanism.

[0018] Optionally, the power assembly includes a pulley mounted on the outer end of the input shaft, a drive belt mounted on the pulley, and a drive motor at the other end of the drive belt.

[0019] Optionally, the wall thickness of the housing is 5.5mm-9mm; the inner side of the housing is provided with concave and convex surfaces adapted to the sealing ring and the support ring, and the end of the housing is provided with a retaining ring groove.

[0020] Optionally, the input shaft assembly further includes an inner bearing and an outer bearing respectively mounted on the input shaft, a spacer mounted on one side of the outer bearing, a lip seal mounted on the other side of the outer bearing, and an oil seal mounted at the inlet of the gearbox.

[0021] Secondly, this utility model provides a harvester, which is equipped with a crushing mechanism, and the crushing mechanism is connected to the gear transmission box described in the first aspect;

[0022] The crushing mechanism also includes a movable blade core shaft connected to the output shaft, two mounting plates respectively installed at both ends of the movable blade core shaft, and a movable blade assembly connected to the outside of the movable blade core shaft;

[0023] One of the mounting plates is fixedly connected to the gearbox on the outside by bolts.

[0024] Beneficial effects: Compared with the prior art, this utility model has the following advantages:

[0025] By installing a safety clutch at the connection between the input shaft and the input gear inside the gearbox, when the input shaft and the input gear are overloaded, the torque force of the spring assembly acts on the sliding pin to impact the housing, making a sound to remind the operator to cut off the power. The built-in design can reasonably adapt to different field working environments and make reasonable use of the internal space of the gearbox.

[0026] The built-in safety clutch uses axially arranged sealing rings, support rings, and retaining rings to progressively limit the movement of the driving core, ensuring the structural stability of the driving core and providing anti-interference capabilities.

[0027] The built-in safety clutch is designed close to the input gear, allowing for better lubrication with gear oil, reducing friction loss, and enhancing heat dissipation.

[0028] The number of sliding pins and springs on the active core can be selected and set according to the actual use scenario, thereby actively adjusting the rated torque range of the safety clutch, including but not limited to 100Nm / 200Nm / 400Nm. Attached Figure Description

[0029] Figure 1 The diagram shows an embodiment of the crushing mechanism, gear transmission box, and power assembly of this utility model.

[0030] Figure 2 The figure shown is a cross-sectional view of the input shaft assembly of this utility model;

[0031] Figure 3 The diagram shown is an exploded view of the safety clutch of this utility model;

[0032] Figure 4 The image shown is a cross-sectional view of the gear transmission box of this utility model;

[0033] Figure 5 The diagram shown is a structural diagram of the crushing mechanism of this utility model.

[0034] In the diagram: 1-Gear transmission box, 10-Input shaft assembly, 100-Safety clutch, 1001-Housing, 1002-Small spring, 1003-Large spring, 1004-Sliding pin, 1005-Driving core, 1006-Sealing ring, 1007-Support ring, 1008-Retaining ring, 101-Input shaft, 102-Inner bearing, 103-Outer bearing, 104-Input gear, 105-Spacer, 106-Lip seal, 107-Oil seal, 11-Output shaft assembly, 12-Top cover, 13-Box body, 2-Power assembly, 20-Pulley, 21-Transmission belt, 3-Crushing mechanism, 30-Mounting plate, 31-Moving blade assembly, 32-Moving blade spindle. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example

[0036] This embodiment provides a gear transmission box 1 suitable for a crushing mechanism, the gear transmission box 1 as follows: Figure 1 As shown, it is connected to one side of the crushing mechanism 3 and connected to the power component 2, driving the crushing mechanism to crush and return the material to the field, as... Figure 2 The gearbox 1 shown contains an input shaft 101 assembly 10 and a safety clutch 100. The input shaft 101 assembly 10 is connected to the power assembly 2 and is located inside the gearbox 1, including an input shaft 101 inserted into the gearbox 1 and an input gear 104 mounted on the input shaft 101. The safety clutch 100 is installed at the connection between the input shaft 101 and the input gear 104. Figure 3The safety clutch 100 shown includes: a housing 1001, a drive core 1005, several spring assemblies, a sliding pin 1004, a sealing ring 1006, a support ring 1007, and a retaining ring 1008; the housing 1001 is axially connected to the input gear 104, the drive core 1005 is built into the housing 1001, several spring assemblies are inserted into the drive core 1005, the sliding pin 1004 is placed on the several spring assemblies, the sealing ring 1006 is fitted onto the end of the drive core 1005, the support ring 1007 is installed on one side of the sealing ring 1006, and the retaining ring 1008 is fixed to the end of the housing 1001 and abuts against the support ring 1007; one end of the input shaft 101 is connected to... The power assembly 2 is connected at one end and the other end is inserted into the drive core 1005. The drive core 1005 is keyed to the input shaft 101 through an internal keyway. Thus, the input gear 104 is indirectly keyed to the input shaft 101 through the drive core 1005. When the input gear 104 is subjected to force, it meshes with the output gear to generate torque and drive the output gear to rotate. At the same time, it transmits torque to the input shaft 101. When the torque exceeds the range of the spring assembly, the spring assembly drives the sliding pin 1004 to continuously impact the housing 1001 and make a sound to remind the operator to cut off the power. The built-in design can reasonably adapt to different field working environments and make reasonable use of the internal space of the gear transmission box 1.

[0037] Optional, such as Figure 3 The active core 1005 shown has a plurality of spring holes on its outer surface, and the plurality of spring holes are arranged radially along the surface of the active core 1005.

[0038] Each of the aforementioned spring assemblies includes a small spring 1002 and a large spring 1003. The large spring 1003 is fitted around the outside of the small spring 1002 and inserted into the spring hole. The sliding pin 1004 is engaged with one end of the spring assembly near the housing 1001 and is slidably connected to the spring hole. In this embodiment, the number of spring assemblies is the same as the number of sliding pins 1004. In this embodiment, the number of sliding pins 1004 and springs on the active core 1005 can be selected and set according to the actual usage scenario, thereby actively adjusting the rated torque range of the safety clutch 100, including but not limited to 100Nm / 200Nm / 400Nm.

[0039] Optionally, the wall thickness of the housing 1001 is 5.5mm-9mm; the inner side of the housing 1001 is provided with concave and convex surfaces adapted to the sealing ring 1006 and the support ring 1007, and the end of the housing 1001 is provided with a retaining ring 1008 adapted to the retaining ring 1008. This embodiment can select a housing 1001 of appropriate thickness according to various working conditions, and the concave and convex surfaces on the inner side of the housing 1001 can strictly limit the position of the sealing ring 1006 and the support ring 1007 to avoid displacement due to vibration. The retaining ring 1008 is further limited by the retaining ring groove to ensure the positional stability of the safety clutch 100 on the object.

[0040] Optional, such as Figure 4 The gear transmission box 1 also includes an output shaft assembly 11 cover 12 and a housing 13. The output shaft assembly 11 includes an output gear, an output shaft, and a bearing assembly. The output gear meshes with the input gear 104, the output shaft is inserted into the output gear, and the bearing assembly is mounted on the output shaft and placed inside the gear transmission box 1. The cover 12 is used to enclose the output shaft assembly 11, and the housing 13 is used to protect the input shaft 101 assembly and the output shaft assembly 11.

[0041] After the power assembly 2 is started, it transmits power to the input gear 104 through the input shaft 101. The input gear 104 generates torque after being subjected to force, which drives the output gear and the output shaft to rotate. The output shaft passes through one end of the gear transmission box 1 and is connected to the crushing mechanism to transmit power to the crushing mechanism.

[0042] Optional, such as Figure 1 The power assembly 2 shown includes a pulley 20 and a drive belt 21. The pulley 20 is fitted onto the outer end of the input shaft 101, and the drive belt 21 is mounted on the pulley 20. The other end of the drive belt 21 is connected to the drive motor. In this embodiment, the power assembly 2 can also use sprockets and chains to replace the pulley 20 and drive belt 21, and can be modified accordingly based on the harvester's operating scenario.

[0043] Optional, such as Figure 2 The input shaft 101 assembly 10 shown also includes: an inner bearing 102, an outer bearing 103, a spacer 105, a lip seal 106, and an oil seal 107. The inner bearing 102 and the outer bearing 103 are respectively mounted on the input shaft 101. The spacer 105 is installed on one side of the outer bearing 103, the lip seal 106 is installed on the other side of the outer bearing 103, and the oil seal 107 is installed at the inlet of the gear transmission box 1. In this embodiment, the combination of the inner bearing 102 and the outer bearing 103 achieves stable support for the shaft, and the spacer 105, the lip seal 106, and the oil seal 107 are used to construct a multi-level sealing system to prevent lubricating oil leakage and the intrusion of external contaminants. On the other hand, the safety clutch 100 can make full use of the gear lubricating oil, resulting in better lubrication, reduced friction loss, and enhanced heat dissipation.

[0044] Working principle:

[0045] During installation, a certain number of large springs 1003 and small springs 1002 are assembled into spring assemblies according to the required torque value and placed into the spring holes of the drive core 1005 respectively, corresponding to the sliding pins 1004. Then, the assembled drive core 1005 is placed into the housing 1001. The sealing ring 1006 and the support ring 1007 are placed into the housing 1001 in sequence, and the retaining ring 1008 is placed into the snap ring groove. The retaining ring 1008 sequentially limits the support ring 1007, the sealing ring 1006 and the drive core 1005 as a whole, thus completing the assembly of the clutch and the housing 1001.

[0046] After the clutch is connected to the housing 1001, the input shaft 101 is inserted into the housing 1001 and the input gear 104. After the output shaft assembly 11, the upper cover 12 and other components are assembled with the gear transmission box 1 housing 13, the gear transmission box 1 is installed on the mounting plate on one side of the crushing mechanism, and the input shaft 101 and the output shaft are connected to the power assembly 2 and the crushing mechanism respectively.

[0047] After the power assembly 2 is started, the power is transmitted through the input shaft 101 of the transmission belt 21. The input shaft 101 drives the input gear 104 inside the gear transmission box 1 to rotate. When the input gear 104 is subjected to force, it meshes with the output gear to generate torque, which drives the output gear to rotate and transmits torque to the input shaft 101 at the same time. Since the active core 1005 and the input shaft 101 are keyed, the transmission of torque generates a continuous shearing force on the keyway of the active core 1005. The continuous shearing force then acts on several spring assemblies in the active core 1005, so that the spring assemblies provide a continuous elastic force to the sliding pin 1004, driving the sliding pin 1004 to continuously impact the housing 1001 and make a sound to remind the operator to cut off the power. Moreover, the built-in design can reasonably adapt to different field working environments and make reasonable use of the internal space of the gear transmission box 1. Example

[0048] This embodiment provides a harvester, which is equipped with a crushing mechanism 3, which is connected to the gear transmission box described in embodiment 1.

[0049] like Figure 5 As shown, the crushing mechanism 3 includes: a moving blade core shaft 32, a mounting plate 30, and a moving blade assembly 31; the moving blade core shaft 32 is connected to the output shaft, the two mounting plates 30 are respectively installed at both ends of the moving blade core shaft 32, and the moving blade assembly 31 is connected to the outside of the moving blade core shaft 32, and the outside of one of the mounting plates 30 is fixedly connected to the gear transmission box by bolts.

[0050] In summary, this utility model, by incorporating a safety clutch at the connection between the input shaft and input gear inside the gearbox, enables the spring assembly to exert torque force on the sliding pin to impact the housing when the input shaft and input gear are overloaded, emitting a sound to alert the operator to cut off power. The built-in design can adapt to different field working environments and make efficient use of the internal space of the gearbox. The built-in safety clutch, through the axial placement of a sealing ring, support ring, and retaining ring, progressively limits the drive core, ensuring its structural stability and providing anti-interference capabilities. The built-in safety clutch's proximity to the input gear allows for better lubrication with gear oil, reducing friction loss and enhancing heat dissipation. The number of sliding pins and springs on the drive core can be selected according to the actual usage scenario, thereby actively adjusting the rated torque range of the safety clutch, including but not limited to 100Nm / 200Nm / 400Nm.

[0051] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

Claims

1. A gear transmission box suitable for a crushing mechanism, characterized in that, include: An input shaft assembly, which is connected to the power assembly and located inside the gearbox, includes an input shaft inserted into the gearbox and an input gear mounted on the input shaft; A safety clutch is located at the connection between the input shaft and the input gear, including a housing axially connected to the input gear, a drive core built into the housing, several spring assemblies located in the drive core, a sliding pin placed on the several spring assemblies, a sealing ring fitted on the end of the drive core, a support ring located on one side of the sealing ring, and a retaining ring fixed to the end of the housing and abutting against the support ring. One end of the input shaft is connected to the power assembly, and the other end is inserted into the drive core. The drive core is connected to the input shaft key via an internal keyway. The input gear is connected to the input shaft via a key to the drive core, transmitting torque to the input shaft. When the torque exceeds the range of the spring assembly, the drive pin continuously impacts the housing, producing a sound.

2. A gear box for a shredding mechanism according to claim 1, characterised in that, The outer surface of the active core is provided with a plurality of spring holes, which are arranged radially along the surface of the active core. Each of the aforementioned spring assemblies includes a small spring installed in a spring hole and a large spring fitted around the outside of the small spring; The number of the spring assemblies is the same as the number of sliding pins.

3. The gear box suitable for a shredding mechanism as claimed in claim 1, wherein, The sliding pin is engaged with one end of the spring assembly near the housing and is slidably connected to the spring hole.

4. The gear transmission box suitable for a crushing mechanism according to claim 1, characterized in that, The gearbox also includes an output shaft assembly, comprising an output gear meshing with the input gear, an output shaft inserted into the output gear, and a bearing assembly mounted on the output shaft and placed inside the gearbox.

5. The gear box suitable for a shredding mechanism as claimed in claim 1, wherein, The power assembly includes a pulley mounted on the outer end of the input shaft, a transmission belt mounted on the pulley, and a drive motor at the other end of the transmission belt.

6. The gear box suitable for a shredding mechanism as claimed in claim 1, wherein, The wall thickness of the housing is 5.5mm-9mm; the inner side of the housing is provided with concave and convex surfaces that are adapted to the sealing ring and the support ring, and the end of the housing is provided with a retaining ring groove.

7. The gear box suitable for a shredding mechanism as claimed in claim 1, wherein, The input shaft assembly also includes an inner bearing and an outer bearing respectively mounted on the input shaft, a spacer mounted on one side of the outer bearing, a lip seal mounted on the other side of the outer bearing, and an oil seal mounted at the inlet of the gearbox.

8. A harvester characterised in that, The harvester is equipped with a crushing mechanism, which is connected to the gear transmission box according to any one of claims 1 to 7. The crushing mechanism also includes a movable blade core shaft connected to the output shaft, two mounting plates respectively installed at both ends of the movable blade core shaft, and a movable blade assembly connected to the outside of the movable blade core shaft; One of the mounting plates is fixedly connected to the gearbox on the outside by bolts.

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