Snow plough device for snow ploughs
Patent Information
- Application Number
- CN202522087026.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-10-13
- Estimated Expiration
- 2035-09-28
AI Technical Summary
[0004]本实用新型提供一种除雪车推雪装置，这种除雪车推雪装置可以解决现有除雪车推雪装置存在的抗冲击能力弱、易变形断裂以及冲击后无法自动复位、维修成本高，工作效率低的问题
1、由于本实用新型的结构将整体的铲体分为主铲体部和分铲体部并铰接相连，并在该铰接处铰接有液压油缸和回位弹簧，液压油缸的有杆腔油口与无杆腔油口之间的管道上连接有平衡阀，这样，当铲体受到的冲击力超过液压油缸承载力时，液压油缸的无杆腔油口的压力触发平衡阀开启，液压油缸无杆腔内的油液经平衡阀流至其有杆腔，使油缸缩短，带动分铲体部位移减少了铲体的受力面积，主动卸掉部分冲击力，避免了推铲因受力过载损坏。当冲击消失后（如倒车脱离积雪），开启液压泵，即可通过换向阀控制油液进入液压油缸无杆腔内，推动油缸活塞杆伸出；同时回位弹簧因之前推铲位移被拉伸，产生收缩弹力辅助分铲体部复位，无需人工干预即可使铲体快速恢复至初始作业位置，提升了作业的连续性，提高了工作效率。
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Figure CN224849345U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of engineering machinery manufacturing technology, and in particular to a pusher for a snowplow. Background Technology
[0002] In winter snow removal operations, snowplows with pushers are essential equipment for ensuring smooth road traffic. Currently, the mainstream snowplows with pushers on the market have a single-piece pusher body. The pusher's swinging motion is typically achieved by dual hydraulic cylinders with a fixed swing angle, generally ±32 degrees. When the pusher encounters an obstacle on the left, the left hydraulic cylinder retracts, and the right hydraulic cylinder extends, causing the pusher to swing to the left. Conversely, when the pusher encounters an obstacle on the right, the right hydraulic cylinder retracts, and the left hydraulic cylinder extends, causing the pusher to swing to the right. To ensure the pusher's load-bearing capacity, a mechanical limiter is used to restrict its swing after it reaches its limit angle.
[0003] However, this type of snowplow has the following problems in practical applications: 1. During actual snow removal operations, snowplows with push blades often need to maintain a certain speed to improve snow removal efficiency. When the snow accumulation on the push blade's path is too thick or the snow texture is too hard, the push blade tip will directly bear excessive impact force, and it cannot be unloaded through structural adjustments, leading to push blade deformation or even breakage. This not only affects the normal progress of snow removal operations and increases equipment maintenance costs, but also shortens the lifespan of the push blade and reduces the user experience. 2. If the push blade is displaced by impact, it needs to be manually disassembled and adjusted or reset using external equipment, which is cumbersome and delays snow removal operations. Utility Model Content
[0004] This utility model provides a snowplow device for snowplows, which can solve the problems of weak impact resistance, easy deformation and breakage, inability to automatically reset after impact, high maintenance costs, and low work efficiency of existing snowplow devices.
[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: The snowplow device of the snowplow includes a shovel body and an oil tank. The shovel body includes a main shovel body part. The rear ends of both sides of the main shovel body part are respectively hinged to the secondary shovel body parts through their respective hinges. A return spring is connected between the main shovel body part and the secondary shovel body parts near the hinge point of the main shovel body part and the secondary shovel body parts, and a hydraulic cylinder is hinged thereto. A balance valve is connected to the pipeline between the rod chamber oil port and the rodless chamber oil port of the hydraulic cylinder. A reversing valve and a hydraulic pump are connected to the pipeline between the balance valve and the oil tank.
[0006] A more specific technical solution in the above technical solution is as follows: the middle part of the rear end of the main shovel body is hinged to the mounting frame through a hinge shaft, the mounting frame is installed at the front end of the snowplow frame, and steering cylinders are respectively hinged between the two sides of the rear end of the main shovel body and the mounting frame.
[0007] In some possible implementations, a reinforcing rod is connected between the hinge shaft and the extended end of the steering cylinder.
[0008] In some possible implementations, the rear end of the shovel body is provided with a pulley.
[0009] In some possible implementations, an overflow valve is connected to the pipe between the inlet and outlet of the reversing valve.
[0010] In some possible implementations, a hydraulic oil filter is connected to the pipeline between the directional valve and the hydraulic pump.
[0011] In some possible implementations, the pipeline is a hydraulic hose; the balance valve is a pilot-operated one-way balance valve; the directional valve is a three-position four-way directional valve; and the hydraulic pump is a fixed displacement hydraulic pump.
[0012] The driver's cab faces forward.
[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. Due to the structure of this utility model, the overall shovel body is divided into a main shovel body and a secondary shovel body, which are hinged together. A hydraulic cylinder and a return spring are hinged at this joint. A balance valve is connected to the pipeline between the rod-side port and the rodless-side port of the hydraulic cylinder. Thus, when the impact force on the shovel body exceeds the bearing capacity of the hydraulic cylinder, the pressure at the rodless-side port triggers the balance valve to open. The oil in the rodless-side port of the hydraulic cylinder flows to its rod-side port through the balance valve, shortening the cylinder and causing the secondary shovel body to displace, reducing the force-bearing area of the shovel body and actively relieving part of the impact force, thus preventing the pusher from being damaged due to overload. After the impact disappears (such as when reversing to get off snow), the hydraulic pump is turned on, and the oil is controlled by the reversing valve to enter the rodless-side port of the hydraulic cylinder, pushing the piston rod of the cylinder to extend. At the same time, the return spring, stretched due to the previous displacement of the pusher, generates a contraction force to assist the secondary shovel body in resetting. The shovel body can quickly return to the initial working position without manual intervention, improving the continuity of operation and increasing work efficiency.
[0014] 2. Because a relief valve is connected to the pipeline between the oil inlet and return port of the directional valve, when the hydraulic system pressure exceeds the preset value (such as a sudden pressure rise caused by an impact), the relief valve will automatically open to overflow excess oil back to the oil tank, ensuring that the system pressure is stable within a safe range and protecting core components such as the hydraulic pump, hydraulic cylinder, and directional valve from overpressure damage.
[0015] 3. Because the pipeline is a hydraulic hose, it can avoid the pipeline from getting stuck when the pusher swings, thus ensuring the stability of the hydraulic circuit. Attached Figure Description
[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.
[0017] Figure 2 This is a schematic diagram of the shovel body under impact unloading state according to an embodiment of the present invention.
[0018] Figure 3 This is a hydraulic schematic diagram of the hydraulic control unit of the shovel body according to an embodiment of the present invention. Detailed Implementation
[0019] To make the above-mentioned objectives, features, and advantages of this utility model more readily understood, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model; however, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "hinged," etc., 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, a direct connection, or an indirect connection through an intermediate medium, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0021] like Figure 1 , Figure 2The snowplow device shown is a snowplow for a snow removal vehicle, with Y representing the vehicle's direction of travel. This snowplow device includes a shovel body and a shovel body hydraulic control unit. The shovel body includes a main shovel section 1-1 and two sub-shovel sections. In this embodiment, there are two sub-shovel sections, namely sub-shovel sections 1-2 and 1-3. Sub-shovel sections 1-2 and 1-3 are respectively hinged to the rear ends of both sides of the main shovel section 1-1 via their respective hinges (not shown). The sub-shovel sections are hinged close to the main shovel section. A return spring is connected between the main shovel body and the sub-shovel body, and a hydraulic cylinder 3 is hinged thereto. The return spring provides auxiliary elastic force for the sub-shovel body to reset after impact. The hydraulic cylinder 3 drives the sub-shovel body to swing and reset. In this embodiment, there are two return springs and two hydraulic cylinders 3. Specifically, a return spring 4-1 is connected between the main shovel body 1-1 and the sub-shovel body 1-2 near the hinge point. A hydraulic cylinder 3-1 is hinged to it; a return spring 4-2 is connected between the main shovel body 1-1 and the sub-shovel body 1-3 near the hinge point, and a hydraulic cylinder 3-2 is hinged to it; the middle of the rear end of the main shovel body 1-1 is hinged to the mounting frame 6 via a hinge shaft 5, and the mounting frame 6 is installed at the front end of the snowplow frame (not shown); steering cylinders 7- are respectively hinged between the two sides of the rear end of the main shovel body 1-1 and the mounting frame 6. 1 and steering cylinder 7-2, the extended end of steering cylinder 7-1 is hinged to the main shovel body 1-1, and a reinforcing rod 8-1 is connected between the hinge shaft 5 and the extended end of steering cylinder 7-1; the extended end of steering cylinder 7-2 is hinged to the main shovel body 1-1, and a reinforcing rod 8-2 is connected between the hinge shaft 5 and the extended end of steering cylinder 7-2; the rear ends of the sub-shovel body 1-2 and sub-shovel body 1-3 are respectively provided with pulleys 9, which are used to reduce the friction between the sub-shovel body and the ground / snow accumulation, and assist the sub-shovel body in displacement and unloading.
[0022] like Figure 3The hydraulic control unit of the shovel shown includes an oil tank 10. A balance valve 15 is connected to the pipeline between the rodless chamber port A and the rod chamber port B of the hydraulic cylinder 3. The balance valve 15 is used to control the unidirectional flow of oil in the cylinder and opens to unload when the shovel is impacted, protecting the hydraulic components from damage. A directional valve 14, a hydraulic oil filter 12, and a hydraulic pump 11 are connected to the pipeline between the balance valve 15 and the oil tank 10. An overflow valve 13 is connected to the pipeline between the inlet port P and the return port T of the directional valve. The pipeline is a hydraulic hose, which can prevent the pipeline from getting stuck when the shovel swings and ensure the stability of the hydraulic circuit. Specifically: the inlet of hydraulic pump 11 is connected to the outlet of oil tank 10; the outlet of hydraulic pump 11 is connected to the inlet of hydraulic oil filter 12; the outlet of hydraulic oil filter 12 is connected to the inlet P of directional valve; the working port of directional valve is connected to the rodless chamber port A and the rod chamber port B of hydraulic cylinder 3 respectively through balance valve 15; the return port T of directional valve is connected to oil tank 10; directional valve 14 is a three-position four-way directional valve; and hydraulic pump 11 is a fixed displacement hydraulic pump.
[0023] During snow removal operations, the hydraulic pump draws oil from the tank, which is then filtered before entering the directional valve. Controlling the valve core position allows oil to enter the rodless chamber of the hydraulic cylinder, pushing the piston rod out and causing the two sub-shovels to swing to their working position, merging with the main shovel body. This completes snow removal. When the shovel encounters thick / hard snow, the impact force is transmitted to the piston rod of the hydraulic cylinder, increasing the pressure on the oil port side of the rodless chamber. When the pressure reaches the opening threshold of the balance valve, the valve opens, allowing oil in the rodless chamber to flow to the rod chamber. The piston rod retracts, shortening the cylinder, and the sub-shovels retract with the hydraulic cylinder, reducing the contact area with the snow and dissipating excess impact force. During reset, reversing removes the shovel body from the snow (impact force disappears), the directional valve switches the hydraulic flow, and the hydraulic pump output re-enters the rodless chamber of the hydraulic cylinder, pushing the piston rod out. Simultaneously, the return spring is stretched due to the pusher's displacement, generating a contraction force that assists the shovel body in resetting to its initial working position. This invention, by clearly defining the structural form and connection relationship of each core component of the pusher, achieves the function of "unloading during impact and resetting after impact," avoiding pusher deformation and breakage, extending component service life, and allowing the shovel body to quickly return to its initial working position without manual intervention, improving operational continuity and work efficiency.
[0024] This utility model can be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model shall be included within the protection scope of this utility model.
Claims
1. A snowplow device for a snowplow truck, comprising a shovel and a fuel tank, characterized in that: The shovel body includes a main shovel body, and the rear ends of both sides of the main shovel body are respectively hinged to the secondary shovel body via their respective hinges. A return spring is connected between the main shovel body and the secondary shovel body near the hinge point of the main shovel body and the secondary shovel body, and a hydraulic cylinder is also hinged thereto. A balance valve is connected to the pipeline between the rod-side port and the rodless port of the hydraulic cylinder, and a directional valve and a hydraulic pump are connected to the pipeline between the balance valve and the oil tank.
2. The snowplow device for a snowplow truck according to claim 1, characterized in that: The middle of the rear end of the main shovel body is hinged to the mounting frame via a hinge shaft. The mounting frame is installed at the front end of the snowplow frame. Steering cylinders are respectively hinged between the two sides of the rear end of the main shovel body and the mounting frame.
3. The snowplow device for a snowplow truck according to claim 2, characterized in that: A reinforcing rod is connected between the hinge shaft and the extended end of the steering cylinder.
4. The snowplow device for a snowplow truck according to claim 3, characterized in that: The rear end of the shovel body is equipped with a pulley.
5. The snowplow device for a snow removal vehicle according to claim 1, 2, 3, or 4, characterized in that: An overflow valve is connected to the pipeline between the oil inlet and the oil return port of the reversing valve.
6. The snowplow device for a snowplow truck according to claim 5, characterized in that: A hydraulic oil filter is connected to the pipeline between the reversing valve and the hydraulic pump.
7. The snowplow device for a snowplow truck according to claim 6, characterized in that: The pipeline is a hydraulic hose; the balance valve is a pilot-operated one-way balance valve; the directional valve is a three-position four-way directional valve; and the hydraulic pump is a fixed displacement hydraulic pump.