Impact resistant agricultural harvester guard

Abstract

The utility model discloses an anti -impact agricultural harvester protective cover belongs to agricultural machinery technical field. The protective cover includes frame, fixed transmission mechanism on the frame, fixed on the frame and cover is equipped with the protective shell outside transmission mechanism, set up between the protective shell and the frame buffer mechanism and cleaning mechanism. The buffer mechanism includes two ends fixed in the protective shell inner wall's lead screw, the spring of sleeve setting on the lead screw and the damping pad and rubber pad of sequentially laminating between the spring and the protective shell inner wall, the cleaning mechanism includes support and fixed scraper of support. The utility model discloses through with multistage buffer mechanism and self -cleaning mechanism integration design, makes the protective cover not only has excellent anti -impact performance, still can actively keep transmission system's clean, effectively prevents the belt slip, has guaranteed the operation stability and reliability of harvester under the complex field environment of straw sundries much, stone block impact frequently.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to an impact-resistant protective cover for agricultural harvesters. Background Technology

[0002] As a key piece of equipment in modern agricultural production, agricultural harvesters typically operate in complex environments. When harvesting in the field, the harvester's high-speed transmission mechanism, cutting components, and other core components are frequently subjected to unexpected impacts from hidden stones, hard clods of soil, or other hard debris in the field.

[0003] To protect these delicate internal components, existing harvesters typically have metal protective covers installed on critical parts. These covers are usually simple, rigid shells, and their main function is to prevent punctures and entanglement with straw and other debris.

[0004] However, this purely rigid protection inherently suffers from poor energy absorption when facing high-speed impacts. When hard objects such as stones strike this protective cover, due to the lack of an effective buffer layer, most of the impact energy is directly transferred to the core components it protects, such as the gearbox and motor, through the rigidly connected frame. This instantaneous high-intensity impact, even if it does not directly damage the protective cover itself, can easily cause displacement of internal precision components, loosening of fasteners, or even hidden damage. Over the long term, this will significantly reduce the harvester's operational stability and service life.

[0005] Therefore, existing technologies generally lack a protective structure that can effectively classify and absorb and dissipate external impacts, and cannot provide sufficient dynamic impact protection for the core components of harvesters in complex field environments.

[0006] Therefore, this utility model proposes an impact-resistant protective cover for agricultural harvesters to address the shortcomings of existing technologies. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides an impact-resistant agricultural harvester protective cover, which aims to improve the existing technology of impact-resistant agricultural harvester protective covers, which have a simple protective structure, poor buffering and energy absorption effect, and cannot effectively attenuate external impact forces, which can easily lead to damage to internal core components.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an impact-resistant agricultural harvester protective cover, comprising: a frame, and a transmission mechanism fixed on the frame; the protective cover further comprises a protective shell fixed on the frame and covering the outside of the transmission mechanism, a buffer mechanism disposed between the protective shell and the frame, and a cleaning mechanism.

[0009] The buffer mechanism includes a lead screw fixed at both ends to the inner walls of the protective shell, a spring sleeved on the lead screw, and a damping pad and a rubber pad stacked between the spring and the inner wall of the protective shell.

[0010] Furthermore, the cleaning mechanism includes a bracket and a scraper that is bolted to the bracket, the working surface of which is arranged close to the outer surface of the belt of the transmission mechanism.

[0011] Preferably, the buffer mechanism further includes a nut threadedly connected to the lead screw, the nut abutting against one end of the spring.

[0012] Preferably, the rubber pad is attached to the inner wall of the protective shell, and the damping pad is disposed between the rubber pad and the spring.

[0013] Preferably, the transmission mechanism further includes a motor, a gearbox that is connected to the output end of the motor, and a pulley that is fixedly connected to the output end of the gearbox.

[0014] Preferably, as a further limitation of the above solution, both the motor and the gearbox are fixedly mounted on the frame.

[0015] Preferably, the belt of the transmission mechanism is sleeved on the outer periphery of the pulley.

[0016] Preferably, the support of the cleaning mechanism is fixedly connected to the frame.

[0017] Preferably, a preset gap is formed between the working surface of the scraper and the outer surface of the belt.

[0018] This utility model has the following beneficial effects: 1. In this utility model, by setting a protective shell that can slide on the lead screw, and by stacking rubber pads and damping pads between the inner wall of the protective shell and the spring in sequence, the problem of the single buffer structure of the protective cover in the prior art and the inability to effectively attenuate the impact energy is solved. The technical effect of significantly improving the protection performance of the internal parts of the harvester is achieved by dissolving the external impact force in stages through soft absorption-energy dissipation-elastic buffer.

[0019] 2. In this utility model, by installing a nut for limiting the position of the spring on the lead screw using a threaded connection, the problem of the fixed protection level of the protective cover and its inability to adapt to different working environments in the prior art is solved. This achieves the technical effect of easily adjusting the spring preload by rotating the nut, so that the impact resistance performance of the protective cover can be flexibly adapted to different field working conditions, thereby enhancing the applicability of the equipment.

[0020] 3. This utility model, by using a lead screw to guide the sliding process of the protective shell, solves the problem in the prior art where the protective device deflects or gets stuck when subjected to irregular impacts, leading to buffer failure. It achieves the technical effect of ensuring that the protective shell always moves stably along the preset axis, ensuring reliable triggering and efficient operation of the buffer mechanism, and improving the overall structural stability and service life of the protective cover.

[0021] 4. This utility model, by adding a cleaning mechanism consisting of a scraper and a support, enables the scraper to continuously remove straw, mud, and other debris adhering to the surface of the transmission belt, achieving a self-cleaning function for the belt and effectively preventing entanglement or jamming caused by accumulated debris. Simultaneously, this structure avoids slippage caused by belt surface contamination, ensuring efficient and stable power transmission, thereby significantly improving the harvester's continuous operation capability and overall operational reliability in complex field environments. Attached Figure Description

[0022] Figure 1 This is a perspective view of an impact-resistant protective cover for an agricultural harvester proposed in this utility model; Figure 2 This is a schematic diagram of the buffer mechanism of an impact-resistant agricultural harvester protective cover proposed in this utility model; Figure 3 This is a side view of an impact-resistant agricultural harvester protective cover proposed in this utility model; Figure 4 This is a schematic diagram of the cleaning mechanism of an impact-resistant agricultural harvester protective cover proposed in this utility model.

[0023] Legend: 1. Buffer mechanism; 101. Protective shell; 102. Rubber pad; 103. Damping pad; 104. Spring; 105. Nut; 106. Lead screw; 2. Transmission mechanism; 201. Motor; 202. Gearbox; 203. Pulley; 204. Belt; 205. Frame; 3. Cleaning mechanism; 301. Scraper; 302. Bracket; 303. Bolt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1-4This utility model provides an impact-resistant protective cover for agricultural harvesters, which aims to solve the problems of existing agricultural harvester protective devices having limited impact resistance and lacking self-cleaning ability for transmission components, resulting in equipment being easily damaged and unstable in complex field environments.

[0026] The impact-resistant agricultural harvester protective cover includes a frame 205 as the installation base, a transmission mechanism 2 fixed on the frame 205, a protective shell 101 also fixed on the frame 205 and covering the outside of the transmission mechanism 2, a buffer mechanism 1 disposed between the protective shell 101 and the frame 205, and a cleaning mechanism 3 for cleaning the transmission mechanism 2. The buffer mechanism 1 is designed to form a multi-level buffer flexible connection system between the protective shell 101 and the frame 205. The buffer mechanism 1 includes a lead screw 106, a spring 104 sleeved on the lead screw 106, and a damping pad 103 and a rubber pad 102 stacked between the spring 104 and the inner wall of the protective shell 101. Specifically, the two ends of the lead screw 106 are respectively fixed to the opposite inner walls of the protective shell 101, which is used to provide stable axial guidance for the compression and rebound of the spring 104 when an impact occurs. The rubber pad 102 is attached to the inner wall of the protective shell 101 as a first-level buffer element to absorb high-frequency vibration and initial impact force. The damping pad 103 is disposed between the rubber pad 102 and the spring 104 as a second-stage buffer element to further absorb and dissipate impact energy. Spring 104, as the main buffer element, is sleeved on the outer periphery of lead screw 106 and reciprocates along the axial direction under the guidance of lead screw 106 to dissipate the main impact energy. To achieve adjustable buffer strength, the buffer mechanism 1 also includes a nut 105 threadedly connected to the lead screw 106. The nut 105 abuts against the end of the spring 104 away from the damping pad 103. By rotating the nut 105 to move it along the axial direction of the lead screw 106, the initial preload of the spring 104 can be easily adjusted, so that the entire protective cover can adapt to field impact scenarios of different intensities.

[0027] Reference Figure 1 and Figure 3 The transmission mechanism 2 serves as the power source for the entire harvester operation, and specifically includes a motor 201, a gearbox 202, a pulley 203, and a belt 204. Both the motor 201 and the gearbox 202 are fixedly mounted on the frame 205, providing a stable support foundation for the entire transmission system. The output end of the motor 201 is connected to the input end of the gearbox 202. The output end of the gearbox 202 is fixedly connected to the pulley 203. After the power is output by the motor 201, it is changed and increased in torque by the gearbox 202, and finally drives the belt 204 to rotate through the pulley 203. The belt 204 is fitted around the outer periphery of the pulley 203 and is used to efficiently transmit power to other working parts of the harvester; To ensure the long-term stable operation of the transmission mechanism 2, the protective cover also integrates a cleaning mechanism 3. Please refer to [reference needed]. Figure 1 and Figure 4 The cleaning mechanism 3 includes a support 302 and a scraper 301; The scraper 301 is fixedly connected to the bracket 302 by bolts 303, and the bracket 302 is fixedly connected to the frame 205. This arrangement ensures the positional stability of the cleaning mechanism 3. In the assembled state, the working surface of the scraper 301 is close to the outer surface of the belt 204 and forms a preset gap with it. This non-contact or light contact configuration allows the scraper 301 to effectively scrape off the straw fragments, mud and other debris attached to the surface of the belt 204 when it rotates, thereby avoiding belt slippage or jamming caused by the accumulation of debris.

[0028] In a preferred embodiment, in order to achieve convenient adjustment of the buffering performance, the nut 105 in the buffering mechanism 1 is connected to the lead screw 106 by means of threaded engagement, and one end face of the nut 105 abuts against one end of the spring 104. Through this structure, the operator can rotate the nut 105 to change its axial position on the lead screw 106, thereby adjusting the preload of the spring 104. In a preferred embodiment, in order to form an efficient graded buffering effect, the rubber pad 102 is attached to the inner wall of the protective shell 101, and the damping pad 103 is specifically disposed between the rubber pad 102 and the spring 104. When an impact occurs, the impact force is absorbed and dissipated in sequence through the rubber pad 102, the damping pad 103 and the spring 104. In a preferred embodiment, to provide stable and adaptable working power, the motor 201 and gearbox 202 in the transmission mechanism 2 are both fixedly installed on the frame 205. The output end of the motor 201 is connected to the gearbox 202 for transmission, and the output end of the gearbox 202 is fixedly connected to the pulley 203. The belt 204 is sleeved on the outer circumference of the pulley 203, forming a complete power transmission chain. In a preferred embodiment, to ensure the stability of the cleaning mechanism 3 during equipment operation, the bracket 302 of the cleaning mechanism 3 is fixedly connected to the frame 205; As a preferred embodiment, in order to effectively clean while avoiding excessive wear on the belt 204, a preset gap is formed between the working surface of the scraper 301 and the outer surface of the belt 204, so that the scraper 301 can scrape off large-sized debris without continuously rubbing against the belt 204 body.

[0029] Working principle: During harvester operation, the motor 201 of the transmission mechanism 2 starts, and the output power is increased in speed and torque through the gearbox 202, driving the pulley 203 to rotate, and then providing stable power to the core components of the harvester through the belt 204. When the protective shell 101 is impacted by hard objects such as stones during movement, the impact force is first transmitted to the rubber pad 102 and damping pad 103 on the inner wall of the protective shell 101. The two absorb and dissipate part of the initial impact energy through their own elasticity and damping characteristics; the remaining impact force continues to act on the spring 104, causing it to compress and deform along the guide screw 106, converting the concentrated impact energy into the elastic potential energy of the spring 104. Through this multi-level buffer system composed of the rubber pad 102, damping pad 103 and spring 104, the impact force is efficiently weakened step by step, thereby effectively protecting the internal transmission mechanism 2 and the basic frame 205 from damage.

[0030] Meanwhile, as the transmission mechanism 2 continues to operate, straw, dirt, and other debris adhering to the surface of the belt 204 will move along with the belt 204 to the location of the cleaning mechanism 3. The fixed scraper 301 will continuously scrape these debris off the surface of the belt 204, avoiding the problem of belt slippage or transmission jamming caused by debris accumulation. Through the synergistic effect of the buffer mechanism 1, the transmission mechanism 2, and the cleaning mechanism 3, this utility model solves the problems of the existing technology, such as a single protective structure and the transmission system being easily contaminated, leading to unstable operation of the whole machine.

Claims

1. An impact-resistant protective cover for an agricultural harvester, comprising a frame (205) and a transmission mechanism (2) fixed to the frame (205), the transmission mechanism (2) comprising a belt (204) for transmitting power. Its features are, The impact-resistant agricultural harvester protective cover also includes a protective shell (101) fixed on the frame (205) and covering the outside of the transmission mechanism (2), a buffer mechanism (1) disposed between the protective shell (101) and the frame (205), and a cleaning mechanism (3). The buffer mechanism (1) includes a lead screw (106), a spring (104) sleeved on the lead screw (106), and a damping pad (103) and a rubber pad (102) stacked sequentially between the spring (104) and the inner wall of the protective shell (101). The two ends of the lead screw (106) are respectively fixed to the opposite inner walls of the protective shell (101). The cleaning mechanism (3) includes a bracket (302) and a scraper (301) fixedly connected to the bracket (302) by bolts (303). The working surface of the scraper (301) is set close to the outer surface of the belt (204).

2. The impact-resistant agricultural harvester protective cover according to claim 1, characterized in that: The buffer mechanism (1) further includes a nut (105) threadedly connected to the lead screw (106), the nut (105) abutting against one end of the spring (104).

3. The impact-resistant agricultural harvester protective cover according to claim 2, characterized in that: The rubber pad (102) is attached to the inner wall of the protective shell (101), and the damping pad (103) is disposed between the rubber pad (102) and the spring (104).

4. The impact-resistant agricultural harvester protective cover according to claim 1, characterized in that: The transmission mechanism (2) further includes a motor (201), a gearbox (202) that is connected to the output end of the motor (201), and a pulley (203) that is fixedly connected to the output end of the gearbox (202).

5. The impact-resistant agricultural harvester protective cover according to claim 4, characterized in that: The motor (201) and the gearbox (202) are both fixedly mounted on the frame (205).

6. The impact-resistant agricultural harvester protective cover according to claim 4, characterized in that: The belt (204) is fitted around the outer periphery of the pulley (203).

7. The impact-resistant agricultural harvester protective cover according to claim 1, characterized in that: The bracket (302) of the cleaning mechanism (3) is fixedly connected to the frame (205).

8. The impact-resistant agricultural harvester protective cover according to claim 1, characterized in that: A preset gap is formed between the working surface of the scraper (301) and the outer surface of the belt (204).

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