Three-wheel mobile chassis device for air compressor

Abstract

This utility model discloses a three-wheeled mobile chassis device for air compressors, characterized by: an air compressor base, a traction rod assembly at the lower front end of the air compressor base, the traction rod assembly including a steering wheel, and a front steering wheel at the lower part of the steering wheel; and a rear wheel assembly at the lower rear end of the air compressor base; the air compressor base, the front steering wheel, and the rear wheel assembly form a triangular support structure. The isosceles triangular support structure formed by the air compressor base, the front steering wheel, and the two rear wheels creates a self-stabilizing mechanical system, effectively dispersing the vibration load during air compressor operation and ensuring stable load bearing; the compact design reduces the overall size of the machine, adapting to narrow working spaces; and the precise calculation of the center of gravity ensures uniform distribution of tire ground pressure during transportation, achieving dynamic balance. This innovative three-wheeled mobile chassis device for air compressors, through optimized mechanical structure and material selection, significantly improves the transportation efficiency of equipment in complex environments.

Description

Technical Field

[0001] This utility model relates to the field of transportation equipment technology, specifically a three-wheeled chassis device for a mobile air compressor. Background Technology

[0002] Air compressors, as general-purpose mechanical equipment, play an irreplaceable role in engineering construction, mining, and energy development. Their core function is to provide a stable power source for construction machinery by compressing gas. With the increasing complexity of operating scenarios, users have increasingly stringent requirements for the mobility of air compressors. Especially in special working conditions such as high-altitude mountainous areas and narrow tunnels, traditional stationary air compressors rely on forklifts or cranes for transportation, resulting in high transfer costs and low efficiency. To solve this problem, the industry has gradually developed mobile air compressor chassis technology, but existing solutions still have significant technical bottlenecks.

[0003] Currently, the mainstream mobile air compressor chassis on the market are mainly divided into four-wheel and two-wheel structures, both of which have inherent defects: Steering issues of a four-wheel chassis: Traditional four-wheel air compressor chassis use an automotive-style steering mechanism, which provides good straight-line stability, but the steering system is complex (typically including a steering wheel, differential, steering tie rods, etc.). In complex terrains such as high-altitude and mountainous areas, its minimum turning radius often exceeds 1.5 meters, making it difficult to turn around flexibly in narrow spaces. In addition, the four-wheel layout increases the overall weight of the machine, which not only raises production costs but also causes energy waste during transportation.

[0004] Stability issues with two-wheeled chassis: Some lightweight air compressors employ a two-wheeled chassis structure, which reduces manufacturing costs but presents significant stability issues. The two-wheeled layout raises the equipment's center of gravity, making it highly susceptible to tipping over, especially when operating on slopes or during emergency braking. This risk increases dramatically when the air compressor is fully loaded. Data from a mining company shows that the accident rate of air compressors with two-wheeled chassis increases significantly when operating on slopes exceeding 12°.

[0005] To address the aforementioned issues, the market urgently needs a new chassis solution that combines steering flexibility, driving stability, and economy. This utility model proposes a three-wheeled mobile chassis device for air compressors, which effectively solves these problems through an innovative triangular support structure and omnidirectional steering system. Utility Model Content

[0006] The purpose of this utility model is to provide an innovative three-wheel mobile chassis device for air compressors, which significantly improves the transportation efficiency of the equipment in complex environments by optimizing the mechanical structure and material selection, in order to address the problems mentioned above.

[0007] The technical solution of this utility model is as follows: This utility model discloses a three-wheeled mobile chassis device for an air compressor, including an air compressor base. A traction rod assembly is provided at the lower front end of the air compressor base. The traction rod assembly includes a steering wheel, and a front steering wheel is also provided at the lower part of the steering wheel. A rear wheel assembly is provided at the lower rear end of the air compressor base. The air compressor base, the front steering wheel, and the rear wheel assembly form a triangular support structure.

[0008] The compressor adopts an isosceles triangular support structure consisting of an air compressor base, front steering wheels, and two rear wheels. The triangular layout forms a self-stabilizing mechanical system, effectively dispersing the vibration load during air compressor operation and ensuring stable load bearing. The compact design reduces the overall size of the machine and adapts to narrow working spaces. The center of gravity position is precisely calculated to ensure that the tire ground pressure is evenly distributed during transportation, achieving dynamic balance.

[0009] Furthermore, the steering wheel and the front steering wheel axle are independently connected by a double-row tapered roller bearing. The low friction characteristics of the bearing allow the steering wheel to rotate independently, achieving omnidirectional steering. The sealing structure effectively prevents sand and dust from entering, extending service life. It is also easy to operate, and the steering wheel can be easily controlled manually, reducing the intensity of operation.

[0010] Furthermore, the drawbar assembly also includes a drawbar, which is connected to the steering wheel via a hinge structure. When the drawbar is raised, the front steering wheels can turn 360 degrees around the center of the steering wheel, and automatically lock into straight-line driving after returning to the original position. The height and lever arm ratio of the operating handle are designed to improve handling comfort; an overload protection device is provided at the hinge to prevent damage to the structure from sudden impacts.

[0011] Furthermore, the rear wheel assembly includes two rear wheels, which are fixed non-steering wheels with their axes symmetrically distributed with the longitudinal centerline of the air compressor base, ensuring automatic balancing of yaw torque during driving and improving straight-line driving stability.

[0012] In addition, the sheet metal base and the dustproof and waterproof coating design effectively block moisture and dust, protecting the internal equipment. Compared with the traditional cast base, the sheet metal structure significantly reduces weight and improves transportation efficiency.

[0013] Furthermore, the one-piece casting process for steering wheels significantly reduces production costs compared to forging, while also reducing machining steps, shortening the production cycle, and improving production efficiency.

[0014] Furthermore, the arc-shaped limiting groove design of the base restricts the vertical displacement of the steering wheel, preventing severe steering impacts and preventing the steering wheel from coming off under extreme conditions, thus improving equipment reliability.

[0015] Furthermore, the design of the tow bar folding structure significantly shortens the overall length of the machine after folding, making it compatible with standard transport vehicles. The tow bar can be easily unfolded, improving work efficiency.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. The front steering wheel and the two rear wheels of the three-wheeled mobile chassis device for air compressors of this utility model form an equilateral triangle support, with the center of gravity located at the geometric center, which effectively improves the anti-rollover ability; 2. The independent steering wheel with integrated bearing connection to the front steering wheel of this utility model enables steering without blind spots and adapts to complex terrain; 3. The foldable design of the tow rod in this utility model shortens the transportation size and improves space utilization. Attached Figure Description

[0017] Figure 1 This is a perspective view of a three-wheeled mobile chassis device for an air compressor according to the present invention; Figure 2 This is the front view of the present invention.

[0018] Figure 3 Enlarged view of the steering wheel Reference numerals: 1-Air compressor base, 2-Traction rod assembly, 21-Steering wheel, 22-Front steering wheel, 23-Traction rod, 3-Rear wheel assembly, 31-Rear wheel. Detailed Implementation

[0019] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0020] This utility model device consists of three parts: an air compressor base 1, a tow bar assembly 2, and a rear wheel assembly 3. The air compressor base 1 is made of cold-rolled sheet metal, bent and formed, with its surface sandblasted and then coated with an epoxy resin layer to form a dense protective layer. The rear wheel assembly 3 is fixed to the rear end of the air compressor base 1 by welding, and the tow bar assembly 2 is connected to the front end by a hinged structure, forming an isosceles triangular support layout. This structure has been optimized through mechanical simulation to ensure excellent anti-rollover performance under dynamic loads.

[0021] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the tow bar assembly 2 includes a steering wheel 21 and a front steering wheel 22. The steering wheel is integrally formed using a gray cast iron casting process, with embedded double-row tapered roller bearings. The outer ring of the bearing is interference-fitted with the steering wheel, while the inner ring is clearance-fitted with the axle of the front steering wheel 22. This design allows the steering wheel 21 to rotate 360° independently of the axle without dead angles, and steering can be completed by manually applying moderate force. The bearing sealing structure effectively blocks external sand and dust, ensuring long-term maintenance-free operation. The center of gravity of the device is determined through precise calculation, so that its projection is located near the geometric center of a triangle. Specifically, the internal layout of the air compressor base 1 is optimized, with heavy components such as the compressor host symmetrically distributed to ensure minimal fluctuation of the center of gravity under no-load and full-load conditions. This design significantly improves the stability of the equipment on slopes and uneven ground, especially during emergency braking or sudden acceleration, effectively preventing rollover. The tow bar 23 is connected to the steering wheel 21 via a hinge structure, with a self-lubricating copper sleeve at the hinge to ensure smooth lifting operation. When steering is required, the operator raises the drawbar approximately 15°. At this point, the front steering wheels are released from steering lock and can rotate freely around the center of the steering wheel 21. After returning to center, the weight of the drawbar 23 causes the front wheels to resume straight-line driving. This design enables rapid switching of steering modes, improving operational flexibility.

[0023] In addition, the air compressor base 1 adopts a fully enclosed sheet metal structure, with waterproof sealing strips at all joints. The surface coating undergoes multiple spraying processes to form a dense dustproof and waterproof layer, effectively blocking corrosive media in the construction environment. After the air compressor base 1 is welded to the rear wheel assembly 3, the entire assembly undergoes annealing treatment to eliminate internal stress and improve structural strength. The rear wheel assembly 3 includes two fixed non-steering wheels, with the axles rigidly connected to the base via high-strength bolts. The rear wheels 31 use pneumatic tires with a specially designed tread pattern that combines grip and wear resistance. The symmetrical layout allows the equipment to automatically balance yaw torque during operation, making it particularly suitable for long-distance straight-line transportation. The steering wheel 21 is manufactured using a casting process, with the mold design optimized multiple times using CAE software to ensure smooth filling of the molten metal. The casting process utilizes an automated production line, coupled with a precise temperature control system, significantly improving the yield rate. After casting, the steering wheel 21 undergoes annealing treatment to eliminate casting stress, and the machining allowance is reasonably controlled, reducing subsequent processing time. The air compressor base 1 has an arc-shaped limiting groove at its bottom, precisely matching the outer edge of the steering wheel 21. The inner surface of the limiting groove is equipped with a wear-resistant pad, which limits the vertical displacement of the steering wheel 21 and prevents direct metal-to-metal contact and wear. This design prevents excessive lifting of the steering wheel 21 under extreme operating conditions, improving equipment safety. The drawbar 23 is designed with a two-section folding structure, allowing for quick unfolding and folding via a quick-release pin. After folding, the drawbar 23 is parallel to the front steering wheel 22, significantly shortening the overall length and adapting to standard container transportation. The folding hinge is made of high-strength steel and surface-hardened to ensure long-term reliability.

[0024] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A three-wheeled mobile chassis device for an air compressor, characterized in that: The air compressor base (1) is provided with a traction rod assembly (2) at the lower front end of the air compressor base (1). The traction rod assembly (2) includes a steering wheel (21) and a front steering wheel (22) is provided at the lower part of the steering wheel (21). A rear wheel assembly (3) is provided at the lower rear end of the air compressor base (1). The air compressor base (1), the front steering wheel (22) and the rear wheel assembly (3) form a triangular support structure.

2. The apparatus according to claim 1, characterized in that: The steering wheel (21) is connected to the axle of the front steering wheel (22) via a bearing, enabling the steering wheel to rotate 360 ​​degrees independently of the axle.

3. The apparatus according to claim 1, characterized in that: The rear wheel assembly (3) includes two rear wheels (31), which are mounted on the lower part of both sides of the rear air compressor base (1). In the triangular support structure, the center of gravity of the air compressor base (1) is located near the geometric center of the triangle formed by the front steering wheel (22) and the two rear wheels (31).

4. The apparatus according to claim 1, characterized in that: The tow bar assembly (2) also includes a tow bar (23), which is connected to the steering wheel (21) by a hinge structure. When the tow bar is raised, the front steering wheel can turn 360 degrees around the center of the steering wheel.

5. The apparatus according to claim 1, characterized in that: The air compressor base (1) adopts a sheet metal structure and has a dustproof and waterproof coating on its surface. The air compressor base (1) and the rear wheel assembly (3) are fixed by welding.

6. The apparatus according to claim 3, characterized in that: The two rear wheels (31) are fixed non-steering wheels, and their axes are symmetrically distributed with the longitudinal center line of the air compressor base (1).

7. The apparatus according to claim 1, characterized in that: The steering wheel (21) is integrally formed using a casting process.

8. The apparatus according to claim 1, characterized in that: The air compressor base (1) has an arc-shaped limiting groove at the bottom that matches the steering wheel (21) to limit the vertical displacement of the steering wheel.

9. The apparatus according to claim 4, characterized in that: The tow bar assembly (2) has a foldable structure, which can shorten the overall length in the transport state. After folding, the tow bar (23) is parallel to the front steering wheel (22).

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