Reconnaissance vehicle with power device convenient to adjust

Abstract

The invention relates to the technical field of power adjusting systems, in particular to a reconnaissance vehicle capable of conveniently adjusting a power device, which comprises a rear axle assembly, a rack and an auxiliary rack are mounted on the rear axle assembly, and a rear axle driving shaft system is mounted on the rack and is in transmission connection with a chain through a chain wheel component; comprising a pressing arm rotationally connected to the auxiliary rack and a tensioning wheel rotationally connected to the pressing arm. Comprising a hanging bracket arranged on the auxiliary rack and an auxiliary pressing arm rotationally connected to the hanging bracket. The oil outlets are oppositely arranged in the extrusion direction of the auxiliary pressing arm, and one end of each oil outlet is close to the closest meshing position of the tensioning wheel and the chain; the auxiliary pressing arm and the hanging bracket are tensioned through a tension spring so that the free end of the auxiliary pressing arm can be pressed on the pressing arm to form pressure, and the pressure acts on the chain through the tensioning wheel by means of the pressing arm. Lubricating oil is smeared on the chain through chattering generated by the chain, it is guaranteed that chain lubrication does not lose efficacy, abrasion is reduced, the loosening risk is lowered, and normal operation of a power system is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of power adjustment system technology for survey vehicles, and particularly to a survey vehicle with easily adjustable power unit. Background Technology

[0002] Survey vehicles often operate in complex terrains (such as rugged mountain roads, muddy wetlands, and mining areas), making reliable power transmission crucial. To adapt to complex road conditions and provide sufficient power, survey vehicles often employ a rear axle chain drive structure, transmitting driving force to the wheels via a chain connecting sprocket assemblies. This structure is relatively simple, can withstand significant impacts, and is a common choice for engineering vehicles.

[0003] However, chain drives face significant challenges under harsh operating conditions (high dust, mud, sand, rain, severe vibrations, etc.): for example, during long-term operation, the chain inevitably becomes loose due to wear and stretching, as its length increases. Insufficient lubrication exacerbates wear and accelerates the loosening process. A loose chain is prone to jumping and slapping during operation, which not only generates noise but, in more serious cases, can lead to skipped teeth, chain derailment, or even jamming and breakage, causing equipment failure or safety accidents. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution: A survey vehicle with an easily adjustable power unit includes: The rear axle assembly has a frame and a sub-frame mounted on it. The rear axle drive shaft system is mounted on the frame and connected via a sprocket assembly and chain drive. The adjusting mechanism includes a pressure arm that is transferred to the subframe and a tensioning wheel that is transferred to the pressure arm; The auxiliary regulating mechanism includes a hanger mounted on the auxiliary frame and an auxiliary pressure arm connected to the hanger; A piston-type fuel injector is positioned opposite to the compression direction of the auxiliary pressure arm. One end of its piston rod is movably connected to the auxiliary pressure arm, and one end of its oil outlet is close to the nearest meshing point between the tension wheel and the chain. The auxiliary pressure arm is tensioned to the hanger by a tension spring 1312, which presses the free end of the auxiliary pressure arm onto the pressure arm to form pressure. The pressure arm then transmits the pressure to the chain through the tension wheel. The jumping that occurs when the chain is transmitted is transmitted in sequence to the tension wheel, the pressure arm, the auxiliary pressure arm, and the piston rod of the piston-type fuel injector.

[0005] As a further preferred embodiment, the sprocket assembly includes a driving sprocket and a driven sprocket mounted on the drive shaft system, with a chain drive connected to the driving sprocket and the driven sprocket. The sprocket assembly also includes a small sprocket that is transferred to the subframe, the small sprocket also engaging with the chain and located between the transmission of the chain from the tensioner to the driving sprocket.

[0006] As further preferred, one end of the pressing arm is bent to the outside of the chain and engages the tensioning wheel on the outside of the chain, an axle sleeve is installed on the auxiliary frame, the small chain wheel is installed on the axle sleeve through a bearing, a fixed rod is installed on the auxiliary frame, the fixed rod passes through the axle sleeve, and the threaded end of the pressing arm is sleeved on the fixed rod, so that the rotation of the small chain wheel does not affect the pressing arm.

[0007] As further preferred, the auxiliary pressing arm is located on the outside of the pressing arm, one end of the auxiliary pressing arm is connected to the hanger, and the other end is provided with a rubber pressing seat, and the auxiliary pressing arm is pressed on the outer side surface of the auxiliary pressing arm through the rubber pressing seat.

[0008] As further preferred, a clamping cavity is formed in the pressing arm, the chain is transmitted from the driving sprocket to the small sprocket and passes through the clamping cavity, and the piston oil injection seat is arranged in the clamping cavity.

[0009] As further preferred, a small arm frame is connected to the hanger, the small arm frame extends to the clamping cavity, an outer cylinder wall of the piston oil injection seat is hinged to the small arm frame, a hinge groove is formed in the auxiliary pressing arm, and one end of a piston rod of the piston oil injection seat is hinged to the hinge groove.

[0010] As further preferred, a compensation pipe is connected to the piston cylinder of the piston oil injection seat, the other end of the compensation pipe extends out of the pressing arm from the clamping cavity, and a one-way valve is installed on the pipeline of the compensation pipe.

[0011] The beneficial effects of the present application compared with the prior art are: 1. Through the linkage mode of the adjusting mechanism, the auxiliary adjusting mechanism and the tension spring 1312, automatic and continuous compensation for chain slackening is realized. The accurate selection of the tension spring 1312 ensures that the tensioning force is moderate and stable, which effectively prevents chain disengagement and tooth skipping caused by excessive chain slackening, and avoids negative problems such as excessive chain link engagement wear and chain plate fatigue fracture caused by excessive tensioning force, thereby significantly prolonging the service life of the chain and the sprocket, and achieving self-adaptive tensioning and overloading prevention.

[0012] 2. The pressing arm is provided with a clamping cavity, and a piston oil injection seat is arranged in the clamping cavity in a relative manner. The oil outlet of the piston oil injection seat directly aims at the “closest meshing position” of the tensioning wheel and the chain to inject oil. The lubricating oil is directly injected into the critical region where the chain roller, pin shaft and sleeve are about to be in contact and loaded. At this time, the lubricating oil is most likely to penetrate into the tiny gap between the chain roller, pin shaft and sleeve before high-pressure contact is formed, to form an effective oil film. The lubricating oil is coated on the chain by using the vibration of the chain, to ensure that the chain lubrication does not fail, reduce wear and tear, reduce the risk of slackening, and ensure the normal operation of the power system.

[0013] 3. Utilizing the common-sense tensioning method where the diameter of the tensioner pulley is usually much smaller than that of the driving / driven sprockets, the small tensioner pulley rotates at high speed multiple times when the chain moves a single link. The lubricating oil sprayed onto the tensioner pulley teeth is quickly dispersed and evenly spread across the entire tooth surface by the centrifugal force of its high-speed rotation. When the chain links come into contact with the high-speed rotating, lubricated tensioner pulley teeth, it acts like a small "rotating oiling brush," efficiently and relaying the lubricating oil to the chain's hinge areas. This shortens the "journey" and time for the oil to travel from spraying to acting on the key friction pairs of the chain, greatly improving lubricant utilization and coating efficiency. Attached Figure Description

[0014] Figure 1 A partial plan view of a survey vehicle with an adjustable power unit, provided for an embodiment of the present invention; Figure 2 The embodiments of the present invention are provided by Figure 1 Enlarged schematic diagram of part A; Figure 3 The embodiments of the present invention are provided by Figure 1 A schematic diagram from a three-dimensional perspective; Figure 4 The embodiments of the present invention are provided by Figure 3 Enlarged schematic diagram of section B; Figure 5 The embodiments of the present invention are provided by Figure 1 The resulting top-view plan view; Figure 6 The embodiments of the present invention are provided by Figure 3 A schematic diagram from another rotating perspective; Figure 7 The embodiments of the present invention are provided by Figure 6 Enlarged schematic diagram of section C; Figure 8 This is a schematic diagram of the secondary adjustment mechanism in an embodiment of the present invention; Figure 9 This is a schematic diagram of the adjustment mechanism in an embodiment of the present invention.

[0015] In the diagram: 1. Survey vehicle; 11. Rear axle assembly; 111. Frame; 112. Sub-frame; 1121. Bushing; 1122. Fixing rod; 12. Adjustment mechanism; 121. Pressure arm; 1211. Clamping cavity; 122. Tensioner wheel; 13. Secondary adjustment mechanism; 131. Hanger; 1311. Boom; 132. Secondary pressure arm; 1321. Hinge groove; 133. Rubber pressure seat; 14. Piston-type fuel injector; 141. Piston rod; 142. Oil outlet; 1141. Drive sprocket; 1142. Driven sprocket; 1143. Small sprocket. Detailed Implementation

[0016] The above and other aspects, features and advantages of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0017] In one embodiment, as shown in the drawings: Figures 1-9 The present embodiment provides a survey vehicle for facilitating adjustment of a power device, the survey vehicle 1 comprising: A rear axle assembly 11 (the present application is mainly embodied in the rear axle position, thus the partial structure of the rear axle in the drawings can fully illustrate the present application), a frame 111 and a sub-frame 112 are mounted on the upper surface of the rear axle assembly 11, a rear axle drive shaft system is installed on the frame 111 and connected through a chain wheel assembly and a chain; An adjustment mechanism 12, comprising a pressing arm 121 connected to the sub-frame 112 and a tension pulley 122 connected to the pressing arm 121; A sub-adjustment mechanism 13, comprising a hanger 131 arranged on the sub-frame 112 and a sub-pressing arm 132 connected to the hanger 131; A piston oil injection seat 14, arranged opposite to the extrusion direction of the sub-pressing arm 132, one end of a piston rod 141 of the piston oil injection seat 14 is movably connected to the sub-pressing arm 132, and one end of an oil outlet 142 of the piston oil injection seat 14 is close to the nearest meshing position of the tension pulley 122 and the chain; The sub-pressing arm 132 and the hanger 131 are pulled tight through a tension spring 1312, so as to press the free end of the sub-pressing arm 132 on the pressing arm 121 to form a pressure, and the pressure is applied to the chain through the tension pulley 122 by the pressing arm 121; the bounce of the chain during transmission is transmitted to the tension pulley 122, the pressing arm 121, the sub-pressing arm 132 and the piston rod 141 of the piston oil injection seat 14 in sequence.

[0018] When the rear axle assembly 11 transmits power through the chain wheel assembly and the chain assembly, the chain will inevitably be loose, the reasons include that the friction and stretching of the chain will gradually wear the chain, resulting in an increase in length and thus causing loosening. If the chain is not lubricated enough, the increased friction will accelerate the wear of the chain, thus also causing loosening. In order to ensure the normal work of the survey vehicle in harsh environments and to lubricate, the survey vehicle 1 adopts chain drive, and the adjustment mechanism 12 and the sub-adjustment mechanism 13 are used to provide tension to the chain to reduce loosening.

[0019] ​When the chain is loose, the tension spring 1312 is automatically tightened to pull the free end of the secondary pressure arm 132 to press on the pressure arm 121 to form pressure, which is provided to the tension pulley 122 by the pressure arm 121 to ensure that the tension pulley 122 continuously engages and presses on the chain, so that the loose variable of the chain is reduced, but when the chain is too tight, it will have a negative impact, such as the degree of wear of the chain increases, the chain buckle is excessively engaged on the sprocket, and the wear failure occurs; over-tightening will also cause fatigue of each chain link, and excessive wear will cause the chain to break. Therefore, the selection of the tension spring 1312 not only satisfies the pressing of the secondary pressure arm 132 on the pressure arm 121, but also satisfies that the chain is not too loose when the tension pulley 122 is pressed on the chain. Through the secondary pressure arm 132 pressed on the pressure arm 121, and then the tension pulley 122 is pressed on the chain by the pressure arm 121, and finally the tension spring 1312 is tightened to provide pressure to the secondary pressure arm 132, a plurality of contact points are formed between these components in sequence, and these contact points are not fixed, which ensures that the chain has a loose feeling and will not fall off. Moreover, during the conveying process, the chain will vibrate in the radial direction of the sprocket, and the vibration is transmitted to the tension pulley 122, then to the pressure arm 121, then to the secondary pressure arm 132, and then to the piston rod 141 of the piston oil seat 14, and the vibration transmitted to the tension spring 1312 is used to ensure that the chain is not completely tightened. During the transmission of the chain vibration, the connection point of the secondary pressure arm 132 and the piston rod 141 will produce axial reciprocating micro-displacement. This displacement directly drives the piston rod 141 to do high-frequency and small-stroke reciprocating pumping motion in the cylinder of the piston oil seat 14. The vibration frequency of the chain is usually related to the transmission speed, which provides a power source for this reciprocating motion. Each "pull back" stroke of the piston rod 141 generates negative pressure in the cylinder, which sucks in a small amount of lubricating oil from the outside; the following "push out" stroke pressurizes the lubricating oil in the front cavity of the cylinder, forming a spray through the oil outlet 142. The tension spring 1312 not only provides initial tensioning pressure, but its elastic properties also play a role in transmitting and amplifying small vibration displacement, and can also absorb part of the high-frequency impact to protect the piston oil seat 14.

[0020] In this embodiment, the oil injection action is directly driven by the reciprocating movement of the piston rod 141, so its oil injection frequency is synchronized with the chain vibration frequency. More importantly, the oil outlet 142 of the piston oil injection seat 14 is accurately positioned and directed to the "closest meshing point" where the tensioner 122 and the chain are about to enter into engagement or have just contacted. This position is the key point where the load starts to act and the lubricating oil film is most easily squeezed out, improving the lubrication effect, using the vibration generated by the chain to smear the lubricating oil on the chain, ensuring that the chain lubrication does not fail, reducing wear and tear, reducing the risk of looseness, and ensuring the normal operation of the power system. (Supplementary explanation: The "closest meshing point" refers to the starting area where the chain and the tensioner tooth surface contact force and start to transfer pressure, usually located slightly in front of the tangent direction of the tensioner contact point, which is the most effective area for lubricating oil to penetrate into the chain pin shaft / roller).

[0021] In this embodiment, the vibration transmitted to the piston rod 141 is converted into a force that drives the piston rod 141 to move in the piston cylinder of the piston oil injection seat 14, so as to intermittently inject the lubricating oil in the piston oil injection seat 14 through the oil outlet 142 at the other end to the closest meshing point of the tensioner 122 and the chain, so as to lubricate it. The vibration force is converted into a force that drives the piston rod 141 to move, and the reciprocating vibration characteristics of the vibration force are used to make the piston rod 141 in the piston oil injection seat 14 complete frequent pumping (hydraulic oil injection) action in the piston cylinder.

[0022] In this embodiment, according to the tensioning knowledge, the size of the tensioner 122 is often smaller than the size of the chain, and also much smaller than the size of the driving and driven sprockets 1142 on both ends of the chain. Therefore, when the chain rotates one revolution, the tensioner 122 will rotate several revolutions, and the number of revolutions is significantly higher than that of the driving and driven sprockets 1142. After the tensioner 122 picks up the lubricating oil, it is equivalent to a small "rotary oil brush", and the lubricating oil is efficiently and relayed "brushed" to the hinge part of the chain. The "stroke" and time of the oil from injection to action on the key friction pair of the chain are shortened, greatly improving the utilization rate and coating efficiency of the lubricant.

[0023] As shown in Figure 1 、 Figure 5 , the sprocket assembly includes a driving sprocket 1141 and a driven sprocket 1142 mounted on the drive shaft system, and a chain is drivingly connected between the driving sprocket 1141 and the driven sprocket 1142. The sprocket assembly further includes a small sprocket 1143 connected to the auxiliary frame 112, and the small sprocket 1143 is also engaged with the chain and located between the transmission of the chain by the tensioner 122 to the driving sprocket 1141.

[0024] The small sprocket 1143 acts as an intermediate support point, changing the direction and wrap angle of the chain segment from the tensioner 122 to the driving sprocket 1141. The originally longer chain span from the tensioner 122 to the driving sprocket 1141 is divided into two shorter spans, and a tensioning effect is formed on both sides of the tensioner 122. The meshing angle of the chain entering the driving sprocket 1141 can be optimized to be closer to the theoretical tangent direction, reducing meshing impact and reducing sprocket tooth tip wear and chain fatigue.

[0025] As shown in Figure 2 , Figure 6 and Figure 7 , one end of the pressing arm 121 is bent to the outside of the chain and engages the tensioner 122 on the outside of the chain, the shaft sleeve 1121 is installed on the secondary rack 112, the small sprocket 1143 is installed on the shaft sleeve 1121 through a bearing, the fixed rod 1122 is installed on the secondary rack 112, the fixed rod 1122 passes through the shaft sleeve 1121, and the threaded end of the pressing arm 121 is sleeved on the fixed rod 1122, so that the rotation of the small sprocket 1143 does not affect the pressing arm 121.

[0026] The shaft sleeve 1121 is fixedly installed on the secondary rack 112 to provide support for the small sprocket 1143. The fixed rod 1122 passes through the shaft sleeve 1121, but there is no torque or force transmission connection between them (the shaft sleeve is stationary, and the fixed rod is also stationary), and the pressing arm 121 is only sleeved on the fixed rod 1122 and only swings under the extrusion of the secondary pressing arm 132. The swing of the secondary pressing arm 132 is independent of the rotation of the small sprocket 1143 and does not interfere with each other, while saving installation space.

[0027] As shown in Figure 4 , Figure 8 , the secondary pressing arm 132 is located on the outside of the pressing arm 121, one end of the secondary pressing arm 132 is connected to the hanger 131, and the other end is provided with a rubber pressing seat 133. The secondary pressing arm 132 is pressed against the outer side surface of the secondary pressing arm 132 through the rubber pressing seat 133.

[0028] The rubber pressing seat 133 acts as an elastic damping medium between the secondary pressing arm 132 and the pressing arm 121. The tension of the tension spring is transmitted through the secondary pressing arm 132 and finally acts on the pressing arm 121 through the rubber pressing seat 133 to provide basic tension. The small swing of the pressing arm 121 due to chain vibration is transmitted to the secondary pressing arm 132 through the rubber pressing seat 133 to change the displacement or pressure. The rubber pressing seat 133 effectively absorbs and attenuates the high-frequency impact and vibration transmitted by the chain, preventing it from being directly and rigidly transmitted to the secondary pressing arm 132 and the subsequent piston rod 141 mechanism.

[0029] As shown in Figure 9As shown, the clamping cavity 1211 is opened on the pressing arm 121, the chain is transmitted from the driving sprocket 1141 to the small sprocket 1143 and passes through the clamping cavity 1211, and the piston oil injection seat 14 is arranged in the clamping cavity 1211. The lubrication core component is integrated into the structure of the tensioning arm, further improving the compactness of the entire system.

[0030] The small arm bracket 1311 is connected to the hanger 131 and extends to the clamping cavity 1211, the outer cylinder wall of the piston oil injection seat 14 is hinged to the small arm bracket 1311, the hinge groove 1321 is opened on the secondary pressing arm 132, and one end of the piston rod 141 of the piston oil injection seat 14 is hinged to the hinge groove 1321.

[0031] As shown in Figure 4 , Figure 8 , the cylinder end of the piston oil injection seat 14 is hinged to the small arm bracket 1311, allowing the oil injection seat cylinder to have a certain swinging freedom around the small arm bracket 1311. Similarly, the piston rod end is hinged to the hinge groove 1321 of the secondary pressing arm 132, allowing the piston rod 141 to have a certain swinging freedom around the secondary pressing arm. It is the key design to solve the motion compatibility of the multi-link mechanism. The piston rod (141 can be smoothly and non-stuck driven by the secondary pressing arm 132 to perform the suction action, avoiding the dead point. There is a complex relative motion between the swinging of the pressing arm 121, the following (small angle swinging) of the secondary pressing arm 132, and the reciprocating linear motion of the piston rod 141. The double-hinged structure (cylinder hinged + piston rod hinged) perfectly adapts to these relative motions, avoids energy loss or action delay caused by uncoordinated mechanism motion, and ensures that the chain vibration can be efficiently and reliably converted into the driving force of the piston rod.

[0032] It should be noted that: the piston cylinder of the piston oil injection seat 14 is connected with a compensation pipe, the other end of the compensation pipe extends out of the pressing arm 121 through the clamping cavity 1211, and a one-way valve is installed on the pipeline of the compensation pipe.

[0033] The compensation pipe is connected to the piston cylinder at one end. The one-way valve only allows fluid (lubricating oil) to flow from the outer port of the compensation pipe to the inside of the piston cylinder, and is blocked in the opposite direction. The outer port of the compensation pipe is located outside the pressure arm 121, and is usually connected to a main lubricating oil tank or a location that is convenient for oiling, such as being connected to an oil pump in the cab. The driver can start the button to facilitate the start of the oil pump to supply lubricating oil in the tank to the oil chamber of the piston oil cup 14 through the compensation pipe. As the "lifeline" of the lubricating system, the piston oil cup 14 will consume the lubricating oil in its internal chamber during operation (piston rod reciprocation). Or when the internal oil chamber of the piston oil cup 14 generates negative pressure (such as when the piston rod is pulled outwards), the lubricating oil in the external oil tank or oil source will be automatically supplemented into the chamber of the oil cup under the action of the pressure difference, opening the one-way valve. Ensure that the lubricating system is never out of oil, and achieve long-term, continuous automatic lubrication. At this time, the remote compensation mode of the oil circuit system, the present application will not be described in detail.

[0034] The above orientation reference does not represent the specific orientation of each component in the present embodiment. The present embodiment is only for the convenience of describing the scheme and is described relatively by referring to the orientation in the figure. In essence, the specific orientation of each component is determined according to its actual installation and actual use as well as the orientation description habit of those skilled in the art. Therefore, it is stated herein.

[0035] The above specific embodiments further detail the purposes, technical solutions, and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and does not limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A survey vehicle with an easily adjustable power unit, characterized in that, include: The rear axle assembly (11) has a frame (111) and a sub-frame (112) mounted on it. The rear axle drive shaft system is mounted on the frame (111) and connected by a sprocket assembly and a chain drive. The adjustment mechanism (12) includes a pressure arm (121) transferred to the subframe (112) and a tensioning wheel (122) transferred to the pressure arm (121). The auxiliary adjustment mechanism (13) includes a hanger (131) mounted on the auxiliary frame (112) and an auxiliary pressure arm (132) connected to the hanger (131). The piston-type fuel injector (14) is positioned opposite to the compression direction of the auxiliary pressure arm (132). One end of its piston rod (141) is movably connected to the auxiliary pressure arm (132), and one end of its oil outlet (142) is close to the nearest meshing point between the tension wheel (122) and the chain. The auxiliary pressure arm (132) and the hanger (131) are tightened by a tension spring (1312) to press the free end of the auxiliary pressure arm (132) onto the pressure arm (121) to form pressure. The pressure is then transferred from the pressure arm (121) to the chain through the tension wheel (122). The jumping that occurs when the chain is transmitted is sequentially transmitted to the tension wheel (122), the pressure arm (121), the auxiliary pressure arm (132), and the piston rod (141) of the piston-type fuel injector (14).

2. The survey vehicle with an easily adjustable power unit according to claim 1, characterized in that, The sprocket assembly includes a drive sprocket (1141) and a driven sprocket (1142) mounted on the drive shaft system. The chain drive is connected to the drive sprocket (1141) and the driven sprocket (1142). The sprocket assembly also includes a small sprocket (1143) that is rotated on the subframe (112). The small sprocket (1143) also engages with the chain and is located between the transmission of the chain from the tensioner (122) to the drive sprocket (1141).

3. A survey vehicle with an easily adjustable power unit according to claim 2, characterized in that, The pressure arm (121) is equipped with the tension wheel (122) at one end, which bends outward toward the outside of the chain and engages the tension wheel (122) with the outside of the chain. A bushing (1121) is installed on the sub-frame (112). The small sprocket (1143) is mounted on the bushing (1121) through a bearing. A fixing rod (1122) is installed on the sub-frame (112). The fixing rod (1122) passes through the bushing (1121). The screw end of the pressure arm (121) is sleeved on the fixing rod (1122), so that the rotation of the small sprocket (1143) will not affect the pressure arm (121).

4. A survey vehicle with an easily adjustable power unit according to claim 3, characterized in that, The auxiliary pressure arm (132) is located outside the pressure arm (121). One end of the auxiliary pressure arm (132) is connected to the hanger (131), and the other end is provided with a rubber pressure seat (133). The auxiliary pressure arm (132) is pressed on the outer surface of the auxiliary pressure arm (132) through the rubber pressure seat (133).

5. A survey vehicle with an easily adjustable power unit according to claim 4, characterized in that, The pressure arm (121) has a clamping cavity (1211), and the chain is transmitted from the driving sprocket (1141) to the small sprocket (1143) and passes through the clamping cavity (1211). The piston-type fuel injector (14) is located in the clamping cavity (1211).

6. A survey vehicle with an easily adjustable power unit according to claim 5, characterized in that, The boom (1311) is connected to the hanger (131), the boom (1311) extends into the clamping cavity (1211), the outer cylinder wall of the piston-type fuel injector (14) is hinged to the boom (1311), the auxiliary pressure arm (132) is provided with a hinge groove (1321), and one end of the piston rod (141) of the piston-type fuel injector (14) is hinged to the hinge groove (1321).

7. A survey vehicle with an easily adjustable power unit according to claim 6, characterized in that, The piston cylinder of the piston-type fuel injector (14) is connected to a compensation pipe. The other end of the compensation pipe extends from the clamping cavity (1211) to the outside of the pressure arm (121), and a one-way valve is installed on the pipeline of the compensation pipe.

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