An engineering vehicle

Abstract

The present invention discloses an engineering vehicle, which provides energy for a hydraulic actuator by connecting a gas power device to a hydraulic pump. The gas power device has a simple structure, large torque, high speed, high transmission efficiency, low energy consumption, and is environmentally friendly. The exhaust is a decompressed gas, the working noise is low, and there is no exhaust pollution; the energy consumption in the standby state is extremely low. The gas power device used in the engineering vehicle includes an outer ring and a core body. At least one-step secondary flow channel is provided between the nozzle and the exhaust port on the outer ring surface of the core body. The gas enters from the air inlet channel, and is ejected step by step through the nozzle of the core body and the secondary flow channel, acting on at least two driving recesses on the circumference of the outer ring, generating thrust on these driving recesses to drive the outer ring to rotate and do work, thereby realizing power output. Finally, the gas is discharged through the exhaust port of the core body through the exhaust channel.

Description

Technical Field

[0001] The invention discloses an engineering vehicle, which belongs to the technical field of transportation vehicles according to the International Patent Classification (IPC). Background Art

[0002] An engineering vehicle is a vehicle required for use during engineering construction operations. It generally has a traveling device and a hydraulic actuator, and the two share a common engine to provide driving power and hydraulic power.

[0003] However, after the travel device stops, in order to drive the hydraulic actuator, the engine must also be in a standby state or a low-speed working state. Its operating conditions are unreasonable, and it is very easy to generate a large amount of exhaust gas, and the energy utilization rate is low.

[0004] At the same time, harmful gases and particulate pollutants in engine exhaust, such as CO, hydrocarbons, nitrogen oxides and other harmful gases, can also seriously affect human health. Among them, CO combines with hemoglobin in human blood 250 times faster than O2. Even if only a trace amount of CO is inhaled, it may cause hypoxia damage to people, which may cause dizziness and headaches in mild cases and permanent damage to brain cells in severe cases; especially at low speeds and incomplete combustion, the pollutant content is higher.

[0005] To address this problem, existing methods mainly include automobile exhaust treatment, engine optimization design to improve combustion efficiency, or road cleaning technologies such as water sprinkling to reduce dust; however, these solutions can only reduce exhaust pollution to a certain extent and cannot fundamentally solve the automobile exhaust problem.

[0006] Therefore, there is an urgent need to provide an engineering vehicle with low pollution to the operating environment and high efficiency and reliability. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an engineering vehicle, which uses a gas power device as the power device of a car. A multi-stage flow channel is circumferentially arranged on the core of the gas power device, and the energy of the gas is utilized multiple times. The core drives the rotating outer ring to achieve power output. The engineering vehicle has the advantages of being environmentally friendly and pollution-free, convenient output power adjustment, high energy utilization efficiency, energy saving and environmental protection, etc.

[0008] To achieve the above object, the present invention is achieved through the following technical solutions:

[0009] An engineering vehicle comprises a frame, on which a running device and a hydraulic actuator are arranged.

[0010] It also includes a gas power device, which is respectively connected to the hydraulic motors of the walking device and the hydraulic actuator;

[0011] The gas powered device comprises:

[0012] An outer ring, whose inner ring surface is provided with a plurality of driving recesses in the circumferential direction;

[0013] A core body is coaxially arranged in the outer ring and can rotate relative to the outer ring, and the outer ring surface of the core body is provided with at least one nozzle, at least one discharge port, and at least one flushing channel located between the nozzle and the discharge port;

[0014] at least one air inlet passage connected to at least one nozzle; and

[0015] at least one exhaust passage connected to at least one exhaust port;

[0016] The gas enters from the air inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, and acts on at least two driving recesses on the circumference of the outer ring, generating thrust for these driving recesses to drive the outer ring to rotate and do work, thereby realizing power output. Finally, the gas is discharged through the exhaust channel through the exhaust port of the core body.

[0017] Furthermore, at least one air inlet channel, at least one nozzle, at least two driving recesses, at least one primary flow channel, at least one discharge port and at least one exhaust channel form an independent working unit, and the gas power device includes at least one independent working unit.

[0018] Furthermore, the nozzles and secondary flow channels on the core body are connected to the driving recesses corresponding to the outer ring. The secondary flow channels are arranged alternately and connected in sequence with the corresponding driving recesses. The secondary flow channels are arranged circumferentially along the core body or the outer ring.

[0019] Further, an intake passage and an exhaust passage are formed in the core.

[0020] Furthermore, the core includes:

[0021] An air inlet passage, which forms a nozzle on the peripheral surface of the core body, and whose direction is an arc line extending from the middle to the outside, and the nozzle is connected with the driving concave portion corresponding to the outer ring to form a first-stage flow channel;

[0022] The secondary flow channel is an arc line extending from the edge of the core body inward and then bending to the edge. Each secondary flow channel is connected with the front and rear driving recesses corresponding to the outer ring, forming N-step flow channels along the circumference of the core body, where N is a natural number ≥ 2;

[0023] Each step of the flow channel cooperates with the corresponding driving recess of the outer ring to form a multi-step stroke structure with decreasing gas energy.

[0024] Furthermore, the secondary flow channel includes a return channel and a communicating stroke channel, the return channel is communicated with a driving recess corresponding to the outer ring, and the stroke channel is communicated with another driving recess.

[0025] Furthermore, the direction of the core air inlet channel is a logarithmic spiral extending from the middle to the outside, the pole of the logarithmic spiral is set on the central axis of the core, and the direction angle of the logarithmic spiral is 15°-45°.

[0026] Furthermore, an air inlet channel is provided on the core body, and its direction is a logarithmic spiral extending from the middle to the outside, and the direction of the stroke channel of the secondary flow channel is a logarithmic spiral. The direction of the logarithmic spiral of the stroke channel of the secondary flow channel is roughly the same as the direction of the logarithmic spiral of the air inlet channel.

[0027] Furthermore, the gas power device also includes a shaft, and the outer ring and the core body are coaxially arranged on the shaft.

[0028] Furthermore, the gas power device also includes a shaft, the outer ring is coaxially arranged on the shaft with the core body, and the shaft is provided with inlet and outlet shaft passages which are respectively connected to the inlet channel and the exhaust channel of the core body.

[0029] The air inlet and outlet shaft passages in the shaft form an air inlet and an air outlet, and the air inlet and outlet shaft passages are non-connected structures.

[0030] Furthermore, the outer ring is matched with the shaft through the side plates to form a closed space, and the core body is arranged in the closed space and is connected and fixed to the shaft.

[0031] Furthermore, the air inlet channel, the nozzle, the driving recess, the secondary flow channel, the exhaust port and the exhaust channel in the independent working unit constitute a gas flow path.

[0032] Furthermore, the gas power device includes more than two independent working units to form a multi-stage driving structure, and is arranged along the circumference of the core or the outer ring.

[0033] Furthermore, more than two driving recesses are arranged on the inner ring surface of the outer ring, and each driving recess has a contour bottom surface and a driving surface. The contour line of the contour bottom surface is a logarithmic spiral line, and its pole is arranged at the center of the core body.

[0034] Furthermore, it also includes a storage tank, which is connected to the pipeline of the gas power device to supply gas to the air intake passage.

[0035] Furthermore, the gas power device is respectively connected to the hydraulic motor of the traveling device and the hydraulic actuator through a transmission.

[0036] The engineering vehicle of the present invention provides energy for the hydraulic actuator by connecting the gas power device to the hydraulic pump. It has a simple structure, large torque, high speed, high transmission efficiency, low energy consumption, and is environmentally friendly. The exhaust is decompressed gas, the working noise is low, and there is no tail gas pollution. In addition, the compressed gas is used as the power, which reduces the use and operation cost, is simple to maintain, and the vehicle operation stability is higher.

[0037] The gas power device of the present invention also has the following beneficial effects:

[0038] 1. The core body of the present invention is provided with a multi-stage flow channel, that is, the air intake channel is used as the first stage flow channel, and each secondary flow channel is used as the second, third, fourth... stage flow channel. The gas acts on the driving recess of the outer ring from the first stage flow channel, and the driving recess is connected to the second stage flow channel. Then, it returns to the second stage flow channel and acts on another driving recess of the outer ring, and so on, until the gas is discharged from the exhaust channel. The whole process is carried out in the forward direction of the outer ring rotation direction, with large torque, high transmission efficiency, high gas utilization rate, and the output torque further increases with the increase of the rotation speed; it is used to drive the hydraulic pump and output the driving torque steadily.

[0039] 2. The flow channels arranged circumferentially on the core of the present invention effectively reduce the volume of the overall device, and can be used in conjunction with the vehicle's running device to output power. At the same time, the more intake flow channels are arranged on the core, the lower the overall weight is, further improving the output speed and efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A side view of an engineering vehicle according to a first embodiment of the present invention is shown;

[0041] Figure 2 The schematic diagram of the principle of the local hydraulic oil circuit of the engineering vehicle according to the first embodiment of the present invention is shown;

[0042] Figure 3 It is a schematic diagram of the gas power device of the first embodiment of the present invention.

[0043] Figure 4 It is a side view along axis A of the gas power device of the first embodiment of the present invention.

[0044] Figure 5 It is a side view of the gas power device in the first embodiment of the present invention along the axis B.

[0045] Figure 6 It is a radial cross-sectional view of the gas power device according to the first embodiment of the present invention.

[0046] Figure 7 This is another layout diagram of the gas power device according to the first embodiment of the present invention.

[0047] Figure 8 It is a schematic diagram of a gas power device for an engineering vehicle according to the second embodiment of the present invention.

[0048] Fig. 9 It is a side view of the gas power device of the second embodiment of the present invention along the axis C.

[0049] Fig.10 It is a side view along axis D of the gas power device of the second embodiment of the present invention.

[0050] Fig.11 It is a radial cross-sectional view of the gas power device according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings:

[0052] Embodiment 1:

[0053] Combination Figure 1 and Figure 2 As shown, this embodiment provides an engineering vehicle, more specifically, a loader, which includes a frame 5, on which a traveling device 6 and a power device assembly 9 are provided; the frame 5 is also provided with a hydraulic actuator 7, which includes a hydraulic oil circuit, a hydraulic cylinder and a loading bucket assembly.

[0054] In this embodiment, the power device assembly 9 includes a gas power device: first, the gas power device is connected to the walking device 6 through a clutch and a transmission; then, the gas power device is also connected to the hydraulic motor 70 on the hydraulic oil circuit of the hydraulic actuator through a reduction mechanism; at the same time, the frame 5 is also provided with a storage tank for supplying gas to the gas power device (not shown in the figure, preferably a steel cylinder, a Dewar tank, a high-pressure gas cylinder or a gas storage bottle, which is arranged on the frame); the storage tank is connected to the gas power device through a valve body assembly pipeline.

[0055] The gas power device has a wide power adjustment range and can drive the hydraulic motor 70 in real time after the traveling device 6 is parked to provide working energy to the hydraulic actuator 7; and the gas power device is also connected to the traveling device 6 through the transmission to provide power for moving the vehicle body during loading operations.

[0056] See also Figures 3 to 6 The gas power device comprises an outer ring 1, whose inner ring surface is provided with a plurality of driving recesses 11 in the circumferential direction; a core body 3, which is coaxially arranged in the outer ring 1 and can rotate relative to the outer ring, and the outer ring surface of the core body 3 is provided with at least one nozzle 301, at least one discharge port 302, and at least one primary flow channel 300 located between the nozzle and the discharge port;

[0057] At least one air inlet passage 31 connected to at least one nozzle 301; and

[0058] at least one exhaust passage 310 connected to at least one exhaust port 302;

[0059] The compressed gas in the storage tank enters from the air inlet channel 31, and is ejected step by step through the nozzle 301 of the core body 3 and the secondary flushing channel 300, acting on at least two driving recesses 11 on the circumference of the outer ring 1, generating thrust on these driving recesses 11 to drive the outer ring 1 to rotate and do work, realizing continuous power output, and finally, the gas is discharged through the exhaust channel through the exhaust port of the core body 3. The gas power device also includes a shaft 2, and the outer ring 1 and the core body 3 are coaxially arranged on the shaft 2.

[0060] like Figure 6 As shown, the air inlet channel 31 and the exhaust channel 310 are formed in the core body 3, and the nozzle 301 and the secondary flow channel 300 on the core body 3 are connected with the driving recess 11 corresponding to the outer ring 1, wherein the secondary flow channel 300 and the corresponding driving recess 11 are arranged alternately and connected in sequence, and the secondary flow channel 300 is arranged along the circumference of the core body or the outer ring.

[0061] like Figure 6 The core 3 includes: an air inlet channel 31, which forms a nozzle 31 on the peripheral surface of the core, and its direction is an arc line extending from the middle to the outside, and the nozzle 301 is connected with the driving recess 11 corresponding to the outer ring to form a first-stage flow channel;

[0062] The secondary flushing channel 300 is an arc line extending from the edge of the core 3 inward and then bending to the edge. Each flushing channel 300 is connected with the front and rear driving recesses 11 corresponding to the outer ring 1, forming N-stage flow channels along the circumference of the core, where N is a natural number ≥ 2. It should be noted that if it is a 2-stage flow channel, it includes the 1st stage flow channel (inlet channel) and the 2nd stage flow channel (primary flushing channel); if it is a 3-stage flow channel, it includes the 1st stage flow channel (inlet channel), the 2nd stage flow channel (primary flushing channel), the 3rd stage flow channel (another secondary flushing channel), ...

[0063] Each step of the flow channel cooperates with the corresponding driving recess of the outer ring to form a multi-step stroke structure with decreasing gas energy.

[0064] The gas power device can be designed according to the load requirements, in which the core 3 can be set to a 2-stage flow channel, a 3-stage flow channel, or more stages of intake flow channels. Each stage cycle performs work, fully utilizes energy, and maximizes the use efficiency to meet the output torque and speed requirements.

[0065] like Figure 7 Schematic diagram of a 4-stage flow channel. After the compressed gas enters from the 1st-stage flow channel 311, it passes through the 2nd, 3rd, and 4th-stage flow channels 312, 313, and 314, and is ejected to act on the corresponding driving recess 11, and finally is output through the exhaust flow channel 310; Figure 6 This is a schematic diagram of the 5-stage intake air duct. The working process is the same as Figure 7 The schematic is similar. Figure 7 The secondary flow channel 300 includes a return channel and a connected stroke channel, such as Figure 7The return path 3131 and the connected stroke path 3132 in the third-stage flow channel, the return path 3131 is connected to the driving recess corresponding to the outer ring, and the stroke path 3132 is connected to another driving recess.

[0066] See also Figure 3 The gas power device also includes a shaft 2, the outer ring 1 is coaxially arranged on the shaft 2 with the core 3, and the shaft 2 is provided with inlet and outlet shaft channels 21, 210 respectively connected to the inlet channel 31 and the exhaust channel 310 of the core 3. The inlet and outlet shaft channels in the shaft form an inlet and an outlet, and the inlet and outlet shaft channels are non-connected structures. The outer ring 1 is matched with the shaft 2 through the side plates 41, 42 to form a closed space, and the core 3 is arranged in the closed space and connected and fixed to the shaft 2. In the present invention, the core 3 is provided with at least two steps of flow channels, each step of the flow channel is connected to the driving recess corresponding to the outer ring, and finally the gas is discharged from the exhaust flow channel.

[0067] See also Figure 3 In the present invention, the core body 3 can be formed by the cooperation of a left core body and a right core body, and the cooperation surfaces of the left core body and the right core body are provided with an air intake channel 31 and an exhaust channel 310. The core body 3 can also be integrally cast.

[0068] See also Figure 3 , Figure 6 This embodiment is a primary drive structure. An air channel is arranged circumferentially on the core 3 to form a primary drive structure. The air channel is also called an independent working unit. An air inlet channel 31, a nozzle 301, at least two driving recesses 11, at least one primary flow channel 300, a discharge port 302 and an exhaust channel 310 on the core 3 and the outer ring 1 form an independent working unit. The gas power device includes at least one independent working unit. The air inlet channel 31, the nozzle 301, the driving recess 11, the secondary flow channel 300, the discharge port 302 and the exhaust channel 310 in the independent working unit constitute a gas flow path.

[0069] See also Figure 3 , Figure 6 or Figure 7 In the present invention, more than two driving recesses 11 are arranged on the inner ring surface of the outer ring 1, each driving recess has a contour bottom surface 111 and a driving surface 112, the contour line of the contour bottom surface 111 can be a common arc line or a spiral line, when the contour line of the contour bottom surface is a logarithmic spiral line, its pole is set on the axis, each driving recess 11 is also connected with the adjacent step flow channel so that the gas entering the previous step flow channel is discharged from the next step flow channel.

[0070] In the present invention, the direction of the air inlet channel of the core body 3, namely the first-stage flow channel, can be a common arc line or a spiral line, and the direction of each secondary flow channel, namely the stroke channel in the Nth-stage flow channel, can also be a common arc line or a spiral line.

[0071] like Figure 6 and Figure 7 The core body 3 of the present invention is provided with an air inlet channel 31, which runs in a logarithmic spiral extending from the middle to the outside. The stroke channel of the secondary flow channel 300 runs in a logarithmic spiral, and the logarithmic spiral of the stroke channel of the secondary flow channel runs in a direction substantially the same as the logarithmic spiral of the air inlet channel. The air inlet channel of the core body 3 runs in a logarithmic spiral extending from the middle to the outside, and the pole of the logarithmic spiral is set on the central axis of the core body. The logarithmic spiral runs in an angle of 15°-45°. The smaller the angle, the longer the flow channel and the more the loss. The larger the angle, the smaller the tangential component of the driving outer ring.

[0072] See also Figure 3 , Figure 4 and Figure 5 In the present invention, the inlet and outlet shaft channels 21, 210 in the shaft 2 form an inlet and an outlet, and the inlet and outlet shaft channels are non-connected structures. The inlet and outlet of the shaft can be set at one end or both ends of the shaft, the inlet shaft channel 21 is connected to the inlet channel 31 of the core body, and the shaft outlet extends axially to form the outlet shaft channel 210, which is connected to the exhaust channel 310 of the core body.

[0073] The gas power device involved in this application refers to a device that can convert gas energy into mechanical rotation, wherein the device may include other components in addition to the necessary outer ring, core body and its corresponding recessed structure or flow channel structure design; for example, it may include a housing and a sealing structure that provide external protection, or a coupling that provides torque transmission. The outer ring may have different specific forms according to different mechanical rotation output modes, such as an outer toothed structure formed on the outer side of the outer ring to facilitate the output of kinetic energy through gear transmission; another example is that the outer ring has a belt groove to output kinetic energy through belt transmission; another example is that the outer ring has a mounting flange to facilitate the installation of a coupling to output kinetic energy; and so on. The core body and the outer ring are made of hard materials, not limited to metals, metal alloys, plastics, and composite materials. The processing methods of the recessed structure or flow channel structure of the core body and the outer ring can be realized by all known production means, including but not limited to die casting, forging, extrusion, 3D printing, and so on. The air pressure input to the power device may be generated by a compressor (such as an air pressure pump), a container of compressed fluid (such as a high-pressure gas cylinder), or the like.

[0074] Figure 3 and Figure 6 It should be noted that the air inlet channel 31 and the exhaust channel 310 of the core body and the air inlet shaft channel 21 and the air outlet shaft channel 210 do not correspond to each other according to the drawing rules, but for the sake of illustration, Figure 3 The air inlet channel and the exhaust channel of the core body refer to the air inlet channel and the exhaust channel. Figure 8 and Fig.11 A similar schematic diagram is shown here.

[0075] Example 2: Please refer to Figures 8 to 11 The engineering vehicle of this embodiment is basically the same as that of embodiment 1, with the main differences being:

[0076] The gas power device includes two independent working units to form a two-stage drive structure, that is, two air channels are arranged circumferentially on the core 3, each air channel includes an intake channel 31 of more than one order and a secondary flow channel 300 and an exhaust flow channel arranged circumferentially along the core 3. The gas power device comprises an outer ring 1, whose inner ring surface is provided with a plurality of driving recesses 11 on the circumference; a core body 3, which is coaxially arranged in the outer ring 1 and can rotate relative to the outer ring, and the outer ring surface of the core body is provided with two groups of nozzles and exhaust ports, and at least one primary flow channel is provided between each group of nozzles and exhaust ports; the core body is provided with two air inlet channels 31, 32, which correspond to the connected nozzles; and two exhaust channels 310, 320, which correspond to the connected exhaust ports; two streams of gas enter from the two air inlet channels of the core body respectively, and are ejected step by step through the nozzles of the core body 3 and the secondary flow channel 300, acting on the corresponding driving recesses 11 on the circumference of the outer ring, generating thrust on these driving recesses to drive the outer ring 1 to rotate and do work, realizing power output, and finally, the gas is discharged through the exhaust port of the core body through the exhaust channel. The above-mentioned one air inlet channel, one nozzle, a corresponding number of driving recesses and corresponding secondary flow channels, exhaust ports and one exhaust channel form an independent work unit.

[0077] The gas power device also includes a shaft 2, and the outer ring 1 is coaxially arranged on the shaft with the core 3. The shaft 2 is provided with air inlet shafts 21, 22 and air outlet shafts 210, 220 which are respectively connected to the air inlet channels 31, 32 and the air exhaust channels 310, 320 of the core. The shaft 2 is provided with two air inlets and two air outlets corresponding to the air channels; the compressed gas enters from the two air inlets of the shaft 2, is ejected through the air inlet channel of the core 3, and acts on the driving recess 11 of the outer ring 1, generating thrust to drive the outer ring 1 to rotate and do work, and finally the compressed gas returns to the corresponding air outlet through the exhaust channel of the core 3, realizing the continuous output of power. The other structures are the same as those in Example 1 and will not be repeated.

[0078] Embodiment 3: The engineering vehicle of this embodiment is basically the same as that of Embodiment 1, with the main differences being:

[0079] The gas power device of the present invention includes 4 or more independent working units to form a multi-stage driving structure. Three or more air channels are arranged circumferentially on the core body. Each air channel includes an intake channel and a secondary flow channel of more than one order and an exhaust flow channel arranged circumferentially along the core body. The intake channel and the exhaust channel are arranged on the mating surfaces of the left and right core bodies. The shaft is provided with intake shaft channels and exhaust shaft channels corresponding to the number of air channels. The compressed gas enters from the intake shaft channel of the shaft, is ejected through the intake flow channel of the core body, and acts on the driving recess of the outer ring, pushing the outer ring to rotate and do work, realizing continuous power output, and finally the compressed gas returns to the corresponding exhaust shaft channel through the exhaust flow channels of the core body. The other structures are the same as those in Example 1.

[0080] In this embodiment, the engineering vehicle is a loader, and its hydraulic actuator includes a bucket assembly. It can be understood that in other specific embodiments, the hydraulic actuator can also be an excavation bucket, a hydraulic drill or a lifting ladder, etc.; the walking device can also be a crawler mechanism.

[0081] The above records are only embodiments of the present invention. Any modification or change made by a person familiar with the present technology using the present invention shall fall within the patent scope claimed by the present invention and shall not be limited to those disclosed in the embodiments.

Claims

1. An engineering vehicle, comprising a frame, on which a traveling device and a hydraulic actuator are provided, characterized in that: It also includes a gas power device, which is respectively connected to the walking device and the hydraulic motor of the hydraulic actuator; The hydraulic actuator comprises a hydraulic oil circuit, a hydraulic oil cylinder and a loading bucket assembly; The gas powered device comprises: An outer ring, whose inner ring surface is provided with a plurality of driving recesses in the circumferential direction; A core body is coaxially arranged in the outer ring and can rotate relative to the outer ring, and the outer ring surface of the core body is provided with at least one nozzle, at least one discharge port, and at least one flushing channel located between the nozzle and the discharge port; at least one air inlet passage connected to at least one nozzle; and at least one exhaust passage connected to at least one exhaust port; At least one inlet channel, at least one nozzle, at least two driving recesses, at least one primary flushing channel, at least one discharge port and at least one exhaust channel form an independent working unit, and the gas power device includes at least one independent working unit; The core includes An air inlet passage, which forms a nozzle on the peripheral surface of the core body, and whose direction is an arc line extending from the middle to the outside, and the nozzle is connected with the driving concave portion corresponding to the outer ring to form a first-stage flow channel; The secondary flow channel is an arc line extending from the edge of the core body inward and then bending to the edge. Each secondary flow channel is connected with the front and rear driving recesses corresponding to the outer ring, forming N-step flow channels along the circumference of the core body, where N is a natural number ≥ 2; Each step of the flow channel cooperates with the corresponding driving concave portion of the outer ring to form a multi-step stroke structure with decreasing gas energy; The air inlet channel and the exhaust channel are formed in the core body, the nozzle and the secondary flow channel on the core body are connected with the driving recess corresponding to the outer ring, and the secondary flow channel is arranged along the circumference of the core body or the outer ring; The direction of the core air inlet channel is a logarithmic spiral extending from the middle to the outside, the pole of the logarithmic spiral is set on the central axis of the core, and the logarithmic spiral direction angle is 15°-45°; The gas enters from the air inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, and acts on at least two driving recesses on the circumference of the outer ring, generating thrust for these driving recesses to drive the outer ring to rotate and do work, thereby realizing power output. Finally, the gas is discharged through the exhaust channel through the exhaust port of the core body.

2. The engineering vehicle according to claim 1, characterized in that: The gas power device also includes a shaft, on which the outer ring is coaxially arranged with the core body, and on which an inlet and an outlet shaft passage are opened, which are respectively connected to an inlet passage and an outlet passage of the core body.

3. The engineering vehicle according to claim 1, characterized in that: The gas power device comprises more than two independent working units to form a multi-stage driving structure, and the units are arranged along the circumference of the core or the outer ring.

4. The engineering vehicle according to any one of claims 1 to 3, characterized in that: More than two driving recesses are arranged on the inner ring surface of the outer ring, each driving recess has a contour bottom surface and a driving surface, the contour line of the contour bottom surface is a logarithmic spiral line, and its pole is arranged at the center of the core body.

5. The engineering vehicle according to any one of claims 1 to 3, characterized in that: Also included is a storage tank, which is connected to the gas power device pipeline to supply gas to the air intake passage.

6. The engineering vehicle according to any one of claims 1 to 3, characterized in that: The gas power device is respectively connected to the hydraulic motor of the traveling device and the hydraulic actuator through a transmission.

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