A guard for an electric pallet truck

Abstract

The utility model discloses a kind of electric carrier guardrails, it is related to carrier protection technical field, including carrier, locking button is installed on the upper surface of carrier, the both sides of the carrier are fixed with protection mechanism, the utility model is set by the combination of multistage telescopic plate and lightweight high-strength aluminum alloy material, it can be shrunk and folded in the both sides of vehicle body under non-working state, solve the problem of space occupation when protection device is not used, avoid hindering goods fork and carrying;Under extended state, protection range is expanded gradually by four telescopic plates, and aluminum alloy material provides effective lateral impact protection under the premise of not excessively increasing the weight of vehicle body, meet the demand of goods transfer, and by the double limiting setting of blocking gear plate and limiting plate, blocking gear plate is in contact with its side surface to form mechanical hard limit when fourth telescopic plate rotates 90 degrees, solve the problem that hand pushes telescopic plate and is prone to excessive rotation.

Description

Technical Field

[0001] This utility model relates to the field of protective technology for transport vehicles, specifically to a protective railing for electric transport vehicles. Background Technology

[0002] Electric pallet trucks are industrial vehicles powered by electricity used for short-distance transport and stacking of palletized goods. They are widely used in warehousing, manufacturing and other scenarios and are key equipment for improving material turnover efficiency.

[0003] However, existing pallet trucks have the following shortcomings when in use: goods placed on the forks are prone to side tilting or tilting during the handling process, which not only affects the transportation of goods, but also poses a safety threat to the operators. Therefore, in order to prevent goods from falling due to side tilting or impact during the transfer process, protective mechanisms need to be installed on both sides of the vehicle body.

[0004] Meanwhile, if fixed guardrails are installed on both sides of the vehicle body, there will be obvious drawbacks. Some of the fixed guardrails will always protrude from both sides of the vehicle body when not in operation, occupying extra space and causing the forks to collide with the guardrails when picking up goods, which will seriously hinder the picking and unloading operations. If folding guardrails are used, although some of the folding guardrails can be retracted, the folding structure is complicated, the operation is inconvenient, and it is difficult to quickly switch to the working or non-working state. In summary, a protective barrier for electric pallet trucks needs to be developed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is: an electric transport vehicle guardrail, comprising a transport vehicle, a locking button installed on the upper surface of the transport vehicle, and protective mechanisms fixedly connected to both sides of the transport vehicle, wherein the protective mechanisms have: The protective components are disposed on both sides of the transport vehicle, and the protective components include a first telescopic plate; wherein the first telescopic plate serves as a protective base plate, is made of lightweight and high-strength aluminum alloy material, and is disposed on both sides of the vehicle body to provide a protective function; A locking component is fixedly connected to both sides of the transport vehicle and to the telescopic protective component. The locking component includes a positioning component.

[0006] Furthermore, a second telescopic plate is slidably connected to the outer surface of the first telescopic plate. The second telescopic plate is made of the same lightweight and high-strength material as the first telescopic plate. The sliding action achieves the initial expansion of the protective width. A third telescopic plate is slidably connected to the outer surface of the second telescopic plate. The third telescopic plate is used to further extend the protective range. A fourth telescopic plate is slidably connected to the outer surface of the third telescopic plate. The fourth telescopic plate serves as the innermost protective plate, and its end is connected to the rotating mechanism to withstand the lateral impact of the cargo.

[0007] Furthermore, limit plates are fixed to both sides of one end of the first telescopic plate. The limit plates are made of structural steel and are used to precisely limit the sliding stroke of the second telescopic plate. Adsorption magnetic blocks are fixed to the inner wall of the limit plates. The adsorption magnetic blocks are strong magnetic materials and are used to adsorb and fix the first telescopic plate in the extended state.

[0008] Furthermore, the inner wall of the second telescopic plate is provided with a first magnetic block, which is embedded inside the second telescopic plate and attracts each other with the adsorption magnetic block to achieve stable fixation in the extended state. The inner wall of the second telescopic plate is fixedly connected with a second magnetic block, which is used to attract the first magnetic block on the next telescopic plate (i.e., the third telescopic plate) in the extended state, ensuring that each plate maintains rigid linkage when extended. It can be deduced that: except for the fourth telescopic plate which has a first magnetic block but no second magnetic block, the outer surfaces of the second and third telescopic plates are fixedly connected with a first magnetic block and a second magnetic block, respectively, while the outer surface of the first telescopic plate has only one adsorption magnetic block.

[0009] Furthermore, the outer surface of the limiting plate is slidably connected to the inner surface of the second telescopic plate.

[0010] Furthermore, the positioning component includes: a telescopic rod, the output end of which is fixedly connected to an insertion rod; the telescopic rod serves as a power source, employing an electric drive; the insertion rod has high hardness and wear resistance; a fixing block is slidably connected to the outer surface of the insertion rod, serving as the mounting base for the entire locking component and fixed to the transport vehicle body; a stop plate is fixedly connected to the outer surface of the stop plate, the stop plate being processed from a high-strength steel block; when the fourth telescopic plate rotates 90 degrees, it contacts the side of the stop plate, providing a mechanical hard limit to prevent excessive rotation; and a rotating... The shaft, which is subjected to shear force during rotation, is made of alloy steel. A semi-circular block is fitted and fixed to the outer surface of the shaft. The semi-circular block is the core component of the rotation trigger mechanism and rotates synchronously with the fourth telescopic plate. An insertion hole is opened on one side of the semi-circular block. The inner diameter of the insertion hole is precisely matched with the outer diameter of the insertion rod, with the tolerance controlled at the micrometer level, to ensure that the insertion rod can be inserted accurately without wobbling and to achieve mechanical interlocking. A rotating protrusion is fixed to the side of the semi-circular block near the telescopic rod. A triggering component is fixed to one side of the fixed block. The rotating protrusion rotates with the semi-circular block and is used to trigger subsequent sensing signals when it rotates to a designated position.

[0011] Furthermore, the telescopic rod is fixed to the inner surface of the transport vehicle, the side of the fixing block away from the semicircular block is fixed to the outer surface of the transport vehicle, and the side of the semicircular block away from the fixing block is fixed to the outer surface of the fourth telescopic plate.

[0012] Furthermore, the triggering component includes a bent tube, which serves as a protective housing for the sensing element and also for internal wiring. An alarm light, using a high-brightness LED, is mounted on the outer surface of the bent tube to provide a visual warning or confirmation signal to the operator when the system detects an anomaly or successfully locks. A pressure sensor is fixedly attached to the inner surface of the bent tube. The pressure sensor detects the pressure signal generated during mechanical contact and converts it into an electrical signal. The connecting cables for the alarm light and the pressure sensor are both built into the bent tube and the transport vehicle body, ultimately connecting to a central controller inside the transport vehicle. This controller, as existing technology, receives sensor signals and controls the movement of the telescopic rod and the alarm light indication, thereby automating and intelligently controlling the entire protective locking process.

[0013] Furthermore, a sliding convex plate is slidably connected to the inner wall of the bend. The sliding convex plate acts as a force transmission medium, transmitting the physical thrust of the rotating convex block to the pressure sensor. A spring plate is fixed to the side of the sliding convex plate near the pressure sensor. The spring plate is made of spring steel and resets the sliding convex plate when it is not under force, providing a buffer stroke.

[0014] Furthermore, the side of the bend closest to the telescopic rod is fixed to the outer surface of the fixing block, and the side of the spring plate furthest from the sliding protrusion is fixedly connected to the inner wall of the bend.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model combines multi-stage telescopic plates with lightweight, high-strength aluminum alloy material. In the non-working state, it can be retracted and stacked on both sides of the vehicle body, solving the problem of the protective device occupying space when not in use and avoiding obstruction of cargo forklifting and handling. In the extended state, the protective range is gradually expanded through four telescopic plates, and the aluminum alloy material provides effective lateral impact protection without excessively increasing the weight of the vehicle body, meeting the needs of cargo transportation.

[0016] 2. This utility model uses a dual limiting setting of a stop plate and a limiting plate. When the fourth telescopic plate rotates 90 degrees, the stop plate contacts its side to form a mechanical hard limit, which solves the problem of excessive rotation when the telescopic plate is pushed by hand. The limiting plate precisely limits the sliding stroke of each level of telescopic plate, avoiding misalignment, jamming, and incomplete extension during the extension process, and ensuring the accuracy of the protection angle and extension range.

[0017] 3. This utility model uses a multi-level magnetic attraction fixing mechanism, in which the magnetic block of the first telescopic plate is attracted to the first magnetic block of the second telescopic plate, and the second magnetic block of the second telescopic plate is attracted to the first magnetic block of the third telescopic plate. This solves the problem that the multi-section telescopic plates are prone to shrinkage and shaking due to vehicle vibration after extension, avoids the protection failure caused by insufficient rigidity of the protective barrier, and ensures stable linkage after each level of the plate is extended.

[0018] 4. This utility model solves the problem of the protective plate rotating due to centrifugal force and cargo impact force during vehicle operation by using a pressure sensor and an electric telescopic rod in synergy. The rotating protrusion pushes the sliding protrusion to trigger the pressure sensor, and the signal is transmitted to the controller to drive the insertion rod to insert into the insertion hole of the semi-circular block. The micron-level tolerance of the insertion hole and the insertion rod forms a mechanical interlock to avoid the problem of accidental displacement of the protective mechanism. At the same time, the alarm light provides status confirmation to prevent human misjudgment. Attached Figure Description

[0019] Figure 1 This is the front view of this utility model; Figure 2 This is a schematic diagram of the structure of the protective component of this utility model; Figure 3 This is a structural schematic diagram of the first telescopic plate of this utility model; Figure 4 This is a schematic diagram of the structure of the limiting plate of this utility model; Figure 5 This is a cross-sectional view of the second telescopic plate of this utility model; Figure 6 This is a structural schematic diagram of the locking component of this utility model; Figure 7This is a cross-sectional view of the semicircular block of this utility model; Figure 8 This is a cross-sectional view of the bent pipe of this utility model.

[0020] In the diagram: 1. Transport vehicle; 2. Protective mechanism; 21. Protective component; 211. First telescopic plate; 212. Second telescopic plate; 213. Third telescopic plate; 214. Fourth telescopic plate; 215. Limiting plate; 216. Adsorption magnet; 217. First magnet; 218. Second magnet; 22. Locking component; 221. Positioning component; 2211. Telescopic rod; 2212. Insertion rod; 2213. Fixing block; 2214. Stop plate; 2215. Rotating shaft; 2216. Semicircular block; 2217. Insertion hole; 2218. Rotating protrusion; 222. Triggering component; 2221. Bend; 2222. Alarm light; 2223. Pressure sensor; 2224. Sliding protrusion; 2225. Spring plate; 3. Locking button. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose. Example:

[0022] Please see Figure 1 - Figure 7 This utility model provides a technical solution: a protective railing for an electric transport vehicle, including a transport vehicle 1, a locking button 3 installed on the upper surface of the transport vehicle 1, and protective mechanisms 2 fixedly connected to both sides of the transport vehicle 1. The protective mechanisms 2 have the following features: Protective components 21 are disposed on both sides of the transport vehicle 1. The protective components 21 include a first telescopic plate 211. The first telescopic plate 211 serves as a protective base plate and is made of lightweight and high-strength aluminum alloy material. It is disposed on both sides of the vehicle body to provide protective function. Locking component 22 is fixedly connected to both sides of the transport vehicle 1 and to the telescopic protective component 21. Locking component 22 includes positioning component 221.

[0023] The outer surface of the first telescopic plate 211 is slidably connected to the second telescopic plate 212, which is made of the same lightweight and high-strength material as the first telescopic plate 211. The second telescopic plate 212 achieves the initial expansion of the protective width through sliding. The outer surface of the second telescopic plate 212 is slidably connected to the third telescopic plate 213, which is used to further extend the protective range. The outer surface of the third telescopic plate 213 is slidably connected to the fourth telescopic plate 214, which serves as the innermost protective plate. Its end is connected to the rotating mechanism to bear the lateral impact of the cargo.

[0024] Limiting plates 215 are fixed to both sides of one end of the first telescopic plate 211. The limiting plates 215 are made of structural steel and are used to precisely limit the sliding stroke of the second telescopic plate 212. An adsorption magnetic block 216 is fixed to the inner wall of the limiting plate 215. The adsorption magnetic block 216 is a neodymium iron boron permanent magnet with a surface magnetic field strength of not less than 2000 Gauss. It is used to fix the first telescopic plate 211 in the extended state to ensure that sufficient adsorption force is generated.

[0025] The inner wall of the second telescopic plate 212 is provided with a first magnetic block 217, which is embedded inside the second telescopic plate 212 and attracts each other with the adsorption magnetic block 216 to achieve stable fixation in the extended state. The inner wall of the second telescopic plate 212 is fixedly connected with a second magnetic block 218, which is used to attract the first magnetic block 217 on the next telescopic plate (i.e., the third telescopic plate 213) in the extended state, ensuring that each plate maintains rigid linkage when extended. It can be deduced that: except for the fourth telescopic plate 214 which has a first magnetic block 217 but no second magnetic block 218, the outer surfaces of the second telescopic plate 212 and the third telescopic plate 213 are fixedly connected with a first magnetic block 217 and a second magnetic block 218, while the outer surface of the first telescopic plate 211 has only one adsorption magnetic block 216. The first magnetic block 217 and the second magnetic block 218 are both neodymium iron boron permanent magnets, and their magnetic field strength matches that of the adsorption magnetic block 216, possessing strong magnetic attraction force, but less than the pulling force of a human hand. Among them, the magnetic adsorption block 216 and the first magnetic block 217 are attracted to each other. The magnetic force they generate is calculated to be about 30N when the magnetic poles are facing each other and in contact. This value range is set based on the following considerations: On the one hand, the magnetic force is sufficient to overcome the inertial force and vibration generated by the transport vehicle during normal operation (including acceleration, braking and turning), ensuring that the telescopic plate assembly will not spontaneously retract or loosen due to external disturbance when it is extended, thereby ensuring the reliability of the protection; on the other hand, the magnetic force is lower than the single-arm grip pulling force of an ordinary adult, so the operator can easily and smoothly pull out or retract the telescopic plate without the aid of tools, achieving a balance between safety and ease of operation.

[0026] The outer surface of the limiting plate 215 is slidably connected to the inner surface of the second telescopic plate 212.

[0027] The positioning component 221 includes: a telescopic rod 2211, with an insertion rod 2212 fixedly connected to the output end of the telescopic rod 2211. The telescopic rod 2211 serves as a power source, using an electric drive method. The insertion rod 2212 has high hardness and wear resistance. A fixing block 2213 is slidably connected to the outer surface of the insertion rod 2212. The fixing block 2213 serves as the mounting base for the entire locking component 22 and is fixed to the transport vehicle 1. A stop plate 2214 is fixedly connected to the outer surface of the fixing block 2213. The stop plate 2214 is made of high-strength steel. When the fourth telescopic plate 214 rotates 90 degrees, it contacts its side, providing a mechanical hard limit to prevent excessive rotation. A rotating shaft 2215 is rotatably connected to the inner surface of the fixing block 2213. The rotating shaft 2215 bears the rotation. The shearing force is made of alloy steel. A semi-circular block 2216 is fitted and fixed to the outer surface of the rotating shaft 2215. The semi-circular block 2216 is the core component of the rotation trigger mechanism and rotates synchronously with the fourth telescopic plate 214. An insertion hole 2217 is opened on one side of the semi-circular block 2216. The inner diameter of the insertion hole 2217 is precisely matched with the outer diameter of the insertion rod 2212. The fit tolerance is controlled between 0.01mm and 0.05mm to ensure that the insertion rod 2212 can be inserted accurately without shaking and to achieve mechanical interlocking. A rotating protrusion 2218 is fixed to the side of the semi-circular block 2216 near the telescopic rod 2211. A triggering component 222 is fixed to the side of the fixed block 2213. The rotating protrusion 2218 rotates with the semi-circular block 2216 and is used to trigger subsequent sensing signals when it rotates to a designated position.

[0028] The telescopic rod 2211 is fixed to the inner surface of the transport vehicle 1, the side of the fixing block 2213 away from the semicircular block 2216 is fixed to the outer surface of the transport vehicle 1, and the side of the semicircular block 2216 away from the fixing block 2213 is fixed to the outer surface of the fourth telescopic plate 214.

[0029] The triggering component 222 includes a bend 2221, which serves as a protective housing for the sensing element and also for internal wiring. An alarm light 2222, using a high-brightness LED, is mounted on the outer surface of the bend 2221 to provide a visual warning or confirmation signal to the operator when the system detects an anomaly or successfully locks the device. A pressure sensor 2223 is fixedly attached to the inner surface of the bend 2221. The pressure sensor 2223 detects the pressure signal generated during mechanical contact and converts it into an electrical signal. The connecting cables for the alarm light 2222 and the pressure sensor 2223 are both built into the bend 2221 and the transport vehicle 1, ultimately connecting to a central controller inside the transport vehicle 1. This controller, as existing technology, receives sensor signals and controls the movement of the telescopic rod 2211 and the alarm light 2222, thereby automating and intelligently controlling the entire protective locking process.

[0030] A sliding convex plate 2224 is slidably connected to the inner wall of the bend 2221. The sliding convex plate 2224 acts as a force transmission medium, transmitting the physical thrust of the rotating convex block 2218 to the pressure sensor 2223. A spring plate 2225 is fixed to the side of the sliding convex plate 2224 near the pressure sensor 2223. The spring plate 2225 is made of spring steel and resets the sliding convex plate 2224 when it is not under force, and provides a buffer stroke.

[0031] The side of the bend 2221 closest to the telescopic rod 2211 is fixed to the outer surface of the fixing block 2213, and the side of the spring plate 2225 furthest from the sliding protrusion 2224 is fixedly connected to the inner wall of the bend 2221.

[0032] The working principle is as follows: First, in the initial state of not working or picking up / dropping goods, such as Figure 1 As shown, the entire protective mechanism 2 is housed on both sides of the transport vehicle 1, with its protective components 21 in a retracted and folded state. Specifically, the fourth telescopic plate 214 rotates via the semicircular block 2216 and the pivot 2215, making it parallel and abutting against the longitudinal sides of the vehicle body; simultaneously, the first telescopic plate 211, the second telescopic plate 212, and the third telescopic plate 213 are fully retracted by sliding, and each section is tightly fixed to the other by the mutual attraction between the magnetic block 216 of the upper section and the first magnetic block 217 or the second magnetic block 218, forming a compact whole. In this state, the overall outline of the protective mechanism 2 is minimized, effectively solving the technical problem that the protective device occupies space and hinders the normal forklifting and handling of goods when not in use, thus ensuring the basic operational efficiency of the transport vehicle 1.

[0033] When goods are placed on the forks and transfer is about to begin, the operator grasps the outermost first telescopic plate 211 and drives multiple telescopic plates, semicircular blocks 2216, and rotating shafts 2215 to rotate 90° around the inner surface of the fixed block 2213 towards the side closest to the goods, until they are in the position shown. Figure 2 The state shown is such that when the semicircular block 2216 rotates to 90 degrees, the fourth telescopic plate 214, which is fixed to it, moves to a protective position perpendicular to the vehicle's direction of travel. At this time, the side of the fourth telescopic plate 214 comes into contact with the outer surface of the stop plate 2214. The stop plate 2214, as a mechanical hard limiter, solves the problem of excessive rotation that may occur when the first telescopic plate 211 is pushed by hand, ensuring the accuracy of the protective angle and providing a reference for subsequent actions.

[0034] Then, after positioning, the protective component 21 begins to extend longitudinally in stages to adapt to the protective measures for the goods. The operator can pull the first telescopic plate 211 outward, and the first telescopic plate 211 slides outward along the inner surface of the second telescopic plate 212 until the limiting plates 215 on both sides of the first telescopic plate 211 engage with the inner surface of the second telescopic plate 212 and are fixed to the position of the first magnetic block 217. At this time, the adsorption magnetic block 216 and the first magnetic block 217 attract each other, limiting and fixing the first telescopic plate 211 and the second telescopic plate 212. As the first telescopic plate 211 continues to be pulled outward, it will simultaneously drive the second telescopic plate 212. The retractable plate 212 slides outward along the inner surface of the third telescopic plate 213. Similarly, until the limiting plates 215 on both sides of the second telescopic plate 212 are engaged with the inner wall of the second telescopic plate 212, the second magnetic block 218 fixed to the inner surface of the second telescopic plate 212 and the first magnetic block 217 set on the inner wall of the second telescopic plate 212 attract and fix each other until the third telescopic plate 213 is driven to slide outward along the inner surface of the fourth telescopic plate 214. Finally, the limiting plate 215 at the innermost end of the third telescopic plate 213 is engaged with the first magnetic block 217 on the inner surface of the fourth telescopic plate 214, thus completing the extraction and attraction and fixation of multiple telescopic plates.

[0035] It should be noted that the sliding stroke of each telescopic plate is physically limited by the limiting plate 215 on its surface and the telescopic plate of the next level. When extended to the maximum stroke, the second magnetic block 218 fixed to the inner wall of the current telescopic plate (such as the second telescopic plate 212) will quickly attract the corresponding first magnetic block 217 on the next telescopic plate (such as the third telescopic plate 213); at the same time, the magnetic block 216 on the first telescopic plate 211 will also attract the first magnetic block 217 on the second telescopic plate 212. This multi-level magnetic attraction fixing mechanism effectively solves the problem that multi-section telescopic plates may spontaneously retract or shake due to vehicle vibration after extension, ensuring the overall rigidity and stability of the protective barrier in the extended state.

[0036] Finally, after the protective component 21 is fully in place (rotated 90 degrees and fully extended), the system executes the crucial automatic locking and status verification procedure: As the semicircular block 2216 rotates to 90 degrees, the rotating protrusion 2218 on its side also rotates and comes into contact with the sliding protrusion 2224 inside the curved tube 2221. The rotating protrusion 2218 pushes and presses the sliding protrusion 2224 to overcome the elastic force of the spring plate 2225, sliding along the inner wall of the curved tube 2221 towards the pressure sensor 2223 until it contacts the outer surface of the pressure sensor 2223 and generates a clear pressure signal. The pressure sensor 2223 converts this pressure signal into an electrical signal, which is transmitted to the central controller via cables built into the curved tube 2221 and the vehicle body. The controller determines that "the guardrail has rotated to the correct position." Upon receiving the position signal, the controller immediately sends a command to the telescopic rod 2211. The output end of the telescopic rod 2211 extends, pushing the insertion rod 2212 precisely into the pre-drilled insertion hole 2217 on the semicircular block 2216. The precise dimensional fit between the insertion hole 2217 and the insertion rod 2212 forms an interference or small clearance fit, effectively solving the core safety problem that during vehicle movement and turning, centrifugal force and cargo impact force may be transmitted through the fourth telescopic plate 214 to the semicircular block 2216 and the rotating shaft 2215, causing them to rotate and thus rendering the entire protective function ineffective. This mechanical interlock constitutes the ultimate safety guarantee.

[0037] Once the entire locking process is successfully completed, the controller will illuminate the alarm light 2222 on the outer surface of the bend 2221 (for example, by emitting a steady green light), providing the operator with an intuitive visual confirmation signal that "the guardrail is locked and the vehicle can be driven safely," thereby resolving the safety risks that may be caused by human misjudgment of the status.

[0038] Finally, when the transport vehicle 1 arrives at the designated location and needs to be unloaded, in order to avoid the position of the protective component 21 obstructing the unloading space of the workers, the workers can press the locking button 3 on the surface of the transport vehicle 1. The telescopic rod 2211 receives the instruction and will retract, controlling the insertion rod 2212 to move and then disengage from the insertion hole 2217. At this time, the workers can push the first telescopic plate 211 and multiple telescopic plates to rotate and reset.

[0039] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A protective railing for an electric pallet truck, comprising: A transport vehicle (1), with a locking button (3) installed on the upper surface of the transport vehicle (1), characterized in that: protective mechanisms (2) are fixedly connected to both sides of the transport vehicle (1), and the protective mechanisms (2) have: Protective components (21) are provided on both sides of the transport vehicle (1), and the protective components (21) include a first telescopic plate (211). Locking component (22) is fixed to both sides of the transport vehicle (1) and fixed to the telescopic protective component (21). The locking component (22) includes a positioning component (221).

2. The electric pallet truck guardrail according to claim 1, characterized in that: The outer surface of the first telescopic plate (211) is slidably connected to the second telescopic plate (212), the outer surface of the second telescopic plate (212) is slidably connected to the third telescopic plate (213), and the outer surface of the third telescopic plate (213) is slidably connected to the fourth telescopic plate (214).

3. The electric pallet truck guardrail according to claim 2, characterized in that: Limiting plates (215) are fixedly connected to both sides of one end of the first telescopic plate (211), and an adsorption magnetic block (216) is fixedly connected to the inner wall of the limiting plate (215).

4. The electric pallet truck guardrail according to claim 3, characterized in that: The inner wall of the second telescopic plate (212) is provided with a first magnetic block (217), and the inner wall of the second telescopic plate (212) is fixedly connected with a second magnetic block (218).

5. The electric pallet truck guardrail according to claim 4, characterized in that: The outer surface of the limiting plate (215) is slidably connected to the inner surface of the second telescopic plate (212).

6. The electric pallet truck guardrail according to claim 1, characterized in that: The positioning component (221) includes: a telescopic rod (2211), an insertion rod (2212) fixedly connected to the output end of the telescopic rod (2211), a fixed block (2213) slidably connected to the outer surface of the insertion rod (2212), a stop plate (2214) fixedly connected to the outer surface of the fixed block (2213), a rotating shaft (2215) rotatably connected to the inner surface of the fixed block (2213), a semi-circular block (2216) sleeved and fixedly connected to the outer surface of the rotating shaft (2215), an insertion hole (2217) opened on one side of the semi-circular block (2216), a rotating protrusion (2218) fixedly connected to the side of the semi-circular block (2216) near the telescopic rod (2211), and a trigger component (222) fixedly connected to one side of the fixed block (2213).

7. The electric pallet truck guardrail according to claim 6, characterized in that: The telescopic rod (2211) is fixed to the inner surface of the transport vehicle (1), the side of the fixed block (2213) away from the semicircular block (2216) is fixed to the outer surface of the transport vehicle (1), and the side of the semicircular block (2216) away from the fixed block (2213) is fixed to the outer surface of the fourth telescopic plate (214).

8. The electric pallet truck guardrail according to claim 6, characterized in that: The triggering component (222) includes a bend (2221), an alarm light (2222) is installed on the outer surface of the bend (2221), and a pressure sensor (2223) is fixedly connected to the inner surface of the bend (2221).

9. The electric pallet truck guardrail according to claim 8, characterized in that: The inner wall of the bend (2221) is slidably connected to a sliding protrusion (2224), and a spring sheet (2225) is fixedly connected to the side of the sliding protrusion (2224) near the pressure sensor (2223).

10. The electric pallet truck guardrail according to claim 9, characterized in that: The side of the bend (2221) near the telescopic rod (2211) is fixed to the outer surface of the fixing block (2213), and the side of the spring plate (2225) away from the sliding protrusion (2224) is fixedly connected to the inner wall of the bend (2221).

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