Main clutch switch structure of harvesting machine

Abstract

The invention discloses a main clutch switch structure of a harvesting machine, which comprises two contact groups, each contact group comprises a movable contact and a fixed contact, the fixed contacts are fixed on the same insulating part, one group of fixed contacts is connected in series in an engine starting loop and is used for conducting and allowing starting when a clutch is separated, and the other group of fixed contacts is connected in series in an engine starting loop. The other group of fixed contacts is connected to the input end of a vehicle-mounted display screen and used for outputting alarm signals in the clutch combination state, the two groups of movable contacts are installed on the same movable plate, the movable contacts and the fixed contacts are oppositely arranged, and the movable plate moves through a movable mechanism.

Description

Technical Field

[0001] The invention relates to a main clutch switch structure of a harvesting machine. Background Art

[0002] To ensure the safety of personnel and machinery before ignition, it is necessary to ensure that the header clutch and threshing clutch are both in a disengaged state. If the clutch is not completely disengaged during startup, the engine will need to drive the load of the harvester at the same time, causing a sudden increase in the starter current (up to twice the normal value), accelerating contact erosion and battery aging. Improper clutch engagement will also cause excessive belt stress, belt slippage, abnormal noise, and breakage. Starting with the clutch engagement will also pose a potential safety hazard to personnel around the machine.

[0003] In order to prevent damage to the engine, belt, starter and battery due to improper engagement of the clutch, the harvesting machinery is equipped with a main clutch switch. The engine cannot be started when the clutch is engaged. At the same time, the main clutch switch is connected to the display screen to determine whether an alarm is needed based on the working status.

[0004] At present, the main clutch status detection of harvesting machinery is generally carried out by using a proximity switch and a contact switch in combination.

[0005] The proximity switch is connected to the vehicle display screen to determine whether an alarm is needed based on the machine status. The contact switch is connected in series in the engine start circuit and does not allow the engine to start when the clutch is engaged. The existing solution requires two sensors to be installed in a limited space. The increase in the number of sensors will not only increase costs, but also increase the failure rate. Summary of the invention

[0006] The purpose of the present invention is to solve the above deficiencies in the prior art and to provide a main clutch switch structure for a harvesting machine.

[0007] A main clutch switch structure of a harvesting machinery includes two contact groups, each contact group includes a movable contact and a fixed contact, and the fixed contacts are all fixed on the same insulating member, wherein one group of fixed contacts is connected in series in an engine starting circuit, and is used to be turned on when the clutch is disengaged to allow starting, and the other group of fixed contacts is connected to the input end of a vehicle-mounted display screen, and is used to transmit information on whether the switch is turned on or off. The two groups of movable contacts are installed on the same movable plate, and the movable contacts are arranged opposite to the fixed contacts, and the movable plate is moved by a movable mechanism.

[0008] Furthermore, the movable mechanism is driven by a mechanical handle linkage mechanism arranged on the harvesting machine to switch the on and off states of its internal normally open contacts.

[0009] Furthermore, a conductor is provided inside the insulating member along the length direction, and two ends of the conductor are respectively connected to the fixed contact and the wiring.

[0010] Furthermore, the movable mechanism includes a connecting rod, an elastic member, and a movable rod. The connecting rod is fixedly connected to the movable plate. The elastic member is located between the movable rod and the connecting rod, and both ends of the elastic member are respectively connected to the movable rod and one end of the connecting rod.

[0011] Furthermore, the insulating member, the movable mechanism, the movable plate, and the contact group are all arranged in the chamber inside the housing.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0013] By designing a main clutch switch with two sets of independent normally open contacts, accurate identification of the main clutch state of the harvesting machine and dual-channel control function are achieved. The switch structure can simultaneously control the engine start circuit and the alarm display system. The functions are highly integrated, effectively replacing the traditional detection method using a combination of proximity switches and contact switches, and significantly simplifying the system structure.

[0014] In terms of structure, the present invention adopts a double-group normally open contact structure arranged in a cross pattern, and the two groups of contacts are isolated by an insulating gasket to prevent short-circuit and leakage problems, improving the use safety and electrical reliability of the switch. The two groups of contacts are independent of each other and do not interfere with each other, and respectively extend independent signal lines, one group is connected to the engine start circuit, and one group is connected to the vehicle-mounted display system, making the entire control logic clearer and the response more timely.

[0015] The present invention further realizes the physical drive of the main clutch switch through a mechanical handle linkage mechanism, so that the switch is automatically pressed to close the start circuit in the clutch separation state, and the switch is released to disconnect the circuit in the clutch engagement state, enhancing the mechanical linkage during the operation process, avoiding the possibility of human misoperation, and improving the operation safety.

[0016] Compared with the prior art solutions, the present invention has the advantages of convenient installation and compact structure. Since the new design can use the original installation structure of the contact switch without adding extra space or modifying the bracket, the layout inside the machine is more reasonable, reducing the complexity of the overall machine design and manufacturing.

[0017] In addition, while canceling the proximity switch, the present invention reduces the number of sensors and the wiring density, effectively reducing the system cost and failure points. The system stability and reliability are greatly improved, the maintenance cycle is extended, the service life is extended, the maintenance frequency and labor cost are reduced, and the overall machine operation efficiency is improved.

[0018] In summary, through the innovative double-contact main clutch switch structure, the present invention realizes the integrated management of the control circuit and the alarm system, and has many advantages such as reasonable structure, clear functions, low cost, safety and reliability, and convenient use. It is applicable to various types of harvesting machinery and has good application prospects and industrial promotion value. Brief Description of the Drawings

[0019] Figure 1 is an internal schematic diagram of the main clutch switch structure;

[0020] Figure 2 is a cross-sectional view of the main clutch switch structure;

[0021] In the figure, 1 is the movable rod, 2 is the elastic member, 3 is the connecting rod, 4 is the movable plate, 5 is the movable contact, 6 is the fixed contact, 7 is the conductor, 8 is the insulating member, and 9 is the housing. Detailed Embodiment

[0022] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0023] The main clutch switch structure includes two contact groups. Each contact group includes a movable contact 5 and a fixed contact 6, and the fixed contacts 6 are all fixedly arranged on the same insulating member 8. Among them, one group of fixed contacts 6 is connected in series in the engine starting circuit and is used to conduct in the clutch disengaged state so that the engine can be started; the other group of fixed contacts 6 is connected to the input end of the vehicle-mounted display screen and is used to transmit the information of the on or off state of the switch. The two groups of movable contacts 5 are both installed on the same movable plate 4 and are arranged opposite to their respective fixed contacts 6, and the movable plate 4 is driven to move through a movable mechanism.

[0024] This embodiment realizes the automatic switching of the electrical control logic when the operating state of the clutch changes. On the one hand, it ensures that the engine can only be started under the condition of clutch disengagement, improving the operation safety; on the other hand, the display screen can obtain the information of clutch engagement or disengagement, effectively enhancing the driver's control ability of the operating state of the harvesting machinery.

[0025] In this structure, the display screen monitors the rotational speed information of each auger through each auger rotational speed sensor. When the fixed contact 6 is in the off state, the display screen can obtain that the clutch is in the engaged state (the harvesting part of the harvester is in the working state). At this time, the display screen judges the rotational speed of each auger. If the rotational speed of a certain auger does not reach the set threshold of the auger, the display screen needs to remind the operator to pay attention to possible abnormal situations. When the fixed contact 6 is in the on state, the display screen can obtain that the clutch is in the disengaged state. At this time, the harvesting part of the harvester does not work, and the rotational speed of each auger rotational speed sensor is 0, and no alarm reminder is required.

[0026] This setting enhances the intelligence and response ability of the system, helps to detect potential mechanical failures or maloperations in a timely manner, and avoids operation accidents or equipment damage caused by the abnormal operation of the auger.

[0027] In a possible implementation, the movable mechanism is driven by a mechanical handle linkage mechanism provided on the harvesting machine, and the movement of the movable mechanism controls the on - off state of the normally open contact inside the main clutch switch.

[0028] When the mechanical handle is manually switched by the operator, it drives the movable plate 4 to move through a lever or link mechanism, changing the contact relationship between the movable contact 5 and the fixed contact 6 located thereon, thus completing the circuit switching. The normally open contact is open in the default state and only closes at a specific linkage position, ensuring that the operation has a clear state indication and control response.

[0029] This structure enables the electrical switching to be directly synchronized and linked with the mechanical operation state, effectively enhancing the intuitiveness and consistency of the control system.

[0030] In a possible implementation, a conductor 7 is provided inside the insulating member 8 along its length direction. One end of the conductor 7 is connected to the fixed contact 6, and the other end is connected to an external wiring terminal.

[0031] This design enables signals or power to be stably transmitted to the external control system through the fixed contact 6. The insulating member 8 effectively isolates each channel to prevent short - circuits or interference. The structure of the conductor 7 simplifies the internal wiring, improving the assembly efficiency and system stability.

[0032] Through the collaborative design of the integral molding of the conductor 7 and the insulating component, this structure can maintain good electrical performance and mechanical strength under harsh environments and is suitable for the complex working conditions of agricultural machinery.

[0033] In a possible implementation, the movable mechanism includes a connecting rod 3, an elastic member 2, and a movable rod 1. The connecting rod 3 is fixedly connected to the movable plate 4, the elastic member 2 is located between the movable rod 1 and the connecting rod 3, and both ends of the elastic member 2 are respectively connected to the movable rod 1 and one end of the connecting rod 3.

[0034] When an external mechanical force acts on the elastic member 2 through the movable rod 1, the elastic deformation pushes the connecting rod 3 to move, thereby driving the movable contact 5 on the movable plate 4 to achieve on - off switching. The elastic member 2 provides the necessary buffering and reset force, ensuring smooth operation, timely response, and good shock - resistance performance.

[0035] This structure combines mechanical transmission with flexible control, making the switch action more sensitive, adapting to the operation requirements under different working conditions, and enhancing the reliability and service life of the whole machine.

[0036] In a possible implementation, the insulating member 8, the moving mechanism, the moving plate 4, and the contact group are all arranged in a chamber provided inside the housing 9.

[0037] The above components are centrally arranged in the inner chamber of the housing 9, effectively preventing dust, water vapor, or other environmental factors from interfering with the contact operation or causing a short circuit. The structure of the housing 9 adopts a sealed design to improve the overall protection level; the components are reasonably arranged inside the chamber, facilitating maintenance and replacement. The overall structure is compact and easy to install at a specified position within the harvesting machine.

[0038] Working principle: This structure is provided with two sets of normally open contacts that are independent of each other. The contacts are arranged in a cross-shaped pattern, and insulating gaskets are provided between each group of contacts to prevent short circuits or leakage. Each set of normally open contacts extends an independent signal line, forming two independent and non-conducting signal paths. When the main clutch switch is pressed, the two sets of normally open contacts close respectively, and the corresponding signal line paths conduct respectively.

[0039] Among them, one set of signal lines is connected in series in the engine starting circuit to control the starting authority of the engine; the other set of signal lines is connected to the vehicle-mounted display, and the display can obtain the clutch engagement or disengagement signal.

[0040] When the main clutch is in the disengaged state, the mechanical handle on the harvesting machine acts on the main clutch switch through the linkage mechanism, pressing it to make the contacts close. The starting circuit forms a closed path, and the engine can be started. At the same time, the other set of contacts connected to the display closes, and the circuit with the display conducts. The display receives the signal from the contacts and shows that the main clutch is disengaged. When the main clutch is engaged, the main clutch switch is not pressed, the contacts remain in the open state, the engine starting circuit is in an open state, preventing the engine from starting. At the same time, the other set of contacts connected to the display is disconnected, and the display cannot receive the signal from the contacts, showing that the main clutch is engaged. Thus, the display detects the main clutch engagement state, and then detects the rotation speed of the auger through other sensing devices. If the rotation speeds of the grain auger and the residue auger are lower than the set value, an alarm will be given.

[0041] At the same time, the other set of contacts connected to the display is also in the open state when the main clutch is engaged. At this time, if the rotation speeds of the grain auger and the residue auger are lower than the preset threshold, the display will generate an alarm prompt.

[0042] The technical focus of the present invention lies in the innovative design of a main clutch switch with two sets of normally open contacts, replacing the structural form of using two independent sensors to detect the main clutch state in the traditional solution. By integrating the two signal detection functions into the same switch module, not only is the hardware configuration simplified, the system cost reduced, but also the number of failure points is reduced, and the stability and reliability of the overall system are improved.

[0043] This packaging structure can greatly improve the environmental adaptability and working reliability of the main clutch switch system, and is especially suitable for harsh working environments such as high dust, high humidity, and high vibration outdoors in agricultural machinery.

[0044] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The main clutch switch structure of a harvesting machine is characterized in that, It includes two contact groups, each contact group includes a moving contact and a fixed contact, and the fixed contacts are all fixed on the same insulating part. Among them, one group of fixed contacts is connected in series in the engine starting circuit and is used to conduct when the clutch is disengaged to allow starting. The other group of fixed contacts is connected to the input end of the vehicle-mounted display screen and is used to transmit the information of the on or off state of the switch. The two groups of moving contacts are installed on the same moving plate, the moving contacts are arranged opposite to the fixed contacts, and the moving plate moves through a moving mechanism.

2. The main clutch switch structure according to claim 1, characterized in that, The moving mechanism is driven by a mechanical handle linkage mechanism provided on the harvesting machine to switch the on and off states of the normally open contacts inside it.

3. The main clutch switch structure according to claim 1, characterized in that, A conductor is arranged along the length direction inside the insulating part, and the two ends of the conductor are respectively connected to the fixed contact and the wiring.

4. The main clutch switch structure according to claim 1, wherein, The moving mechanism includes a connecting rod, an elastic member and a moving rod. The connecting rod is fixedly connected to the moving plate. The elastic member is located between the moving rod and the connecting rod, and the two ends of the elastic member are respectively connected to the moving rod and one end of the connecting rod.

5. The main clutch switch structure according to claim 1, wherein, The insulating part, the moving mechanism, the moving plate and the contact group are all arranged in the chamber inside the housing.

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