Multifunctional storage traction platform truck

Abstract

The application discloses a multifunctional warehouse traction platform truck, which comprises a truck chassis, a driving rear axle assembly is assembled at the rear end of the truck chassis, output shafts are connected to driving walking wheels at the two sides of the rear axle, a steering wheel is assembled at the front end of the truck chassis, a whole machine protective shell is arranged above the truck chassis, a control console is arranged at the top of the shell, operation handles are symmetrically arranged at the two sides of the control console, the control console is in transmission connection with the steering wheel through a steering transmission mechanism at the bottom end, a protective back plate is vertically fixed at the rear end of the truck chassis, and a traction assembly is installed at the back side of the back plate; the device adopts a single steering wheel matched with double driving wheels in a triangular layout, greatly reduces the turning radius of the whole vehicle, and is suitable for narrow passages in a workshop; the steering transmission mechanism transmits steering power through a multi-stage connecting rod structure, and has good transmission synchronization; the whole vehicle integrates three modules of walking, operation and traction, has high function integration degree, and can be used for both manned operation and trailer traction operation.

Description

Technical Field

[0001] This invention relates to the field of warehousing and handling equipment technology, and in particular to a multi-functional warehousing traction trolley. Background Technology

[0002] Modern factories and warehousing logistics parks have a large demand for material turnover. Small in-plant tractors, with their energy-saving, environmentally friendly, flexible, and compact features, are widely used for trailer towing operations between workshop shelves and within warehouse areas, effectively reducing the labor intensity of manual handling and improving the efficiency of in-plant cargo transfer. At present, the mainstream similar tractors on the market still have shortcomings in structural design: First, the power batteries of the equipment mostly adopt a completely sealed built-in structure. When the battery fails or needs to be replaced, the entire protective shell must be removed before operation, making the maintenance process cumbersome and time-consuming; Second, the operating handle and steering wheel of existing products are only assembled by a simple direct drive shaft, which restricts the internal space layout of the vehicle and results in insufficient stability of the steering transmission structure assembly.

[0003] In view of the defects of the existing technology, the present invention proposes a multi-functional warehouse traction trolley, which optimizes the overall structure of the vehicle to overcome the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-functional warehouse traction trolley.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-functional warehouse traction trolley includes a chassis frame, a drive rear axle assembly is mounted at the bottom rear end of the chassis frame, drive wheels are respectively connected to the output shafts on both sides of the drive rear axle assembly, and a steering wheel is mounted at the bottom front end of the chassis frame, with the two drive wheels and the steering wheel arranged in a three-point triangular wheel system. The upper part of the chassis is equipped with a protective shell, and the top of the protective shell is equipped with a control console. The control console is symmetrically equipped with operating handles on both sides. The bottom of the control console is connected to the steering wheel through a steering transmission mechanism to drive the steering wheel to complete the steering action. The vehicle chassis has a protective backplate vertically fixed at the top rear end, and a traction assembly is installed at the bottom rear side of the protective backplate. The steering transmission mechanism includes an upper steering transmission shaft that is vertically fixed to the middle of the bottom of the control console. The lower end of the upper steering transmission shaft is connected to a first steering rocker arm seat. Both ends of the bottom of the first steering rocker arm seat are hinged with transverse transmission rods. The other ends of the two transverse transmission rods are respectively hinged to the top ends of the second steering rocker arm seat. The second steering rocker arm seat is fixedly mounted on the top of the lower steering transmission shaft. A wheel seat is fixedly connected to the lower end of the lower steering transmission shaft. The steering wheel is rotatably mounted on the wheel seat.

[0006] The above technical solution adopts a triangular layout with a single steering wheel and dual drive wheels, which greatly reduces the turning radius of the vehicle and is suitable for narrow workshop passages; the integrated steering transmission mechanism transmits steering torque through multi-stage transmission shafts, rocker arms, and tie rods, with good transmission synchronization; the whole vehicle integrates three major modules: walking, control, and traction, with high functional integration, taking into account both passenger operation and trailer towing operations.

[0007] Furthermore, there is an operating and standing space between the protective back panel and the overall protective shell, and the front two ends of the protective back panel are integrally bent to form protective guard edges.

[0008] In the above technical solution, a standing position is reserved between the protective back panel and the outer shell, allowing the operator to stand in the middle of the vehicle and move synchronously with the vehicle without the need for walking or towing; the protective back panel can also be used for the operator to lean against, and the bent protective edges on both sides can simply limit the operator's standing position, improving the safety of the operation process.

[0009] Furthermore, the traction assembly includes a fixing plate that is locked and fixed to the bottom rear side of the protective back plate by fasteners. Multiple horizontally arranged traction hanging plates are arranged at intervals along the vertical direction on the rear side of the fixing plate, and traction columns are coaxially and vertically inserted between the multiple traction hanging plates. An extended observation rod is provided at the top of the traction column, and an observation ring is integrally formed at the upper end of the extended observation rod.

[0010] In the above technical solution, the towing column runs through multiple layers of towing plates, and each layer of towing plates divides the column into multiple sets of attachment points with different heights, which can be adapted to different trailer towing head heights and has greater versatility; the towing column connects all the attachment plates in series, improving the overall towing structure strength; the top observation ring can help the operator quickly locate the rear attachment position, facilitating trailer docking operations.

[0011] Furthermore, the top of the chassis frame is provided with a left support cover and a right support cover, which are arranged at intervals and are both located inside the protective shell of the whole machine. The hollow area between the left and right support covers forms a power battery installation compartment. The two ends of the power battery installation compartment extend to the outside of the whole machine's protective shell, and a battery maintenance sealing plate can be detached and installed at the end opening of the compartment.

[0012] In the above technical solution, the left and right support covers separate independent battery compartments, forming a protective enclosure for the power battery to prevent it from being squeezed by driving collisions; the battery compartment has outward openings at both ends, allowing the battery to be installed and removed without disassembling the entire casing, making maintenance and battery replacement convenient; the support covers also support the upper control mechanism, simplifying the overall vehicle structure with a dual function.

[0013] Furthermore, a handle is fitted on the upper part of the outer side of the battery maintenance cover plate, and a positioning support plate is fixed to the bottom side. The lower surface of the positioning support plate is attached to the upper surface of the chassis frame. A waist-shaped hole is opened in the middle of the positioning support plate, and a threaded hole is opened on the chassis frame corresponding to the waist-shaped hole. The positioning support plate is detachably locked to the chassis frame by bolts passing through the waist-shaped hole and engaging with the threaded hole.

[0014] In the above technical solution, the handle facilitates the lifting, disassembly, and maintenance of the sealing plate; the positioning support plate, combined with the waist-shaped hole structure, allows for slight left and right adjustments to the sealing plate position during assembly, eliminating machining and assembly tolerances; the bolt locking structure is easy to disassemble and assemble, and the battery compartment can be quickly opened for battery maintenance and replacement operations.

[0015] Furthermore, the top of the left and right support covers are jointly equipped with a horizontally arranged bearing base, and the top two sides of the bearing base are vertically fixed with support plates, and the upper ends of the two support plates are jointly fixed with a handle base frame. The upper steering drive shaft is coaxially fitted with an upper shaft protective sleeve on its outer side, and the lower steering drive shaft is coaxially fitted with a lower shaft protective sleeve on its outer side. The upper and lower sections of the upper and lower steering drive shafts are equipped with rolling bearings, which form rotating pairs with the upper shaft protective sleeve and the lower shaft protective sleeve, respectively, through the rolling bearings. The handle base and the bearing base are respectively provided with through holes for the upper shaft protective sleeve and the lower shaft protective sleeve to move through. The outer walls of the upper shaft protective sleeve and the lower shaft protective sleeve are radially fixed with flange mounting plates, and are respectively locked and fixed to the handle base and the bearing base by the flange mounting plates.

[0016] In the above technical solution, the bearing base, support plate, and handle base frame form a layered support frame to stably support the control console and steering drive shaft; the upper and lower shaft protective sleeves are fixed by flange mounting plates, and bearings can be matched inside the sleeves to form stable support for the drive shaft, ensuring smooth rotation and transmission of the drive shaft.

[0017] Furthermore, a drive shaft sleeve is fixed to the inner side of both the first and second steering rocker arm seats. The lower end of the upper steering drive shaft and the top end of the lower steering drive shaft are both machined with external thread sections. A drive keyway is opened along the axial direction on the outer wall of the external thread section. The drive shaft sleeve is slidably fitted on the outside of the external thread section. A drive key matching the drive keyway is provided on the inner wall of the drive shaft sleeve. A nut ring is threaded on the outer side of the external thread section for axial limiting and locking of the drive shaft sleeve.

[0018] In the above technical solution, both the first and second steering rocker arm seats are equipped with a transmission shaft sleeve as a bearing base. The rocker arm seat is coaxially connected to the transmission shaft by the transmission shaft sleeve. The steering torque is synchronously transmitted by the cooperation structure of the flat key and the keyway. The nut ring locks and fixes the transmission shaft sleeve, restricting the transmission shaft sleeve from moving axially along the transmission shaft, and ensuring the stability of the rocker arm seat position.

[0019] Furthermore, both ends of the rear side of the protective backplate are equipped with outline taillights, both sides of the protective housing are equipped with dual-color flowing edge lights, the front side of the protective housing and the top wall of the protective housing are provided with an arc-shaped section, the top of the arc-shaped section is equipped with a warning light, and both sides of the front end of the protective housing are equipped with LED spotlights.

[0020] In the above technical solution, lighting components are installed in multiple places on the vehicle, which can play a role in lighting and warning during operation, reduce collision accidents in the workshop, and improve the overall safety of operation.

[0021] Furthermore, an inspection port is provided in the middle of the front side of the protective shell of the whole machine, and an inspection sealing plate is installed at the inspection port. A charging interface is integrated on the side of the inspection sealing plate, and a power display instrument is installed on the control console.

[0022] In the above technical solution, the inspection port can be opened to maintain and repair the internal electrical control circuits of the vehicle body; the charging interface is integrated into the inspection cover plate, the charging point is front-mounted, and the operation of plugging and unplugging the charging gun is convenient; the power meter displays the remaining battery power in real time, which makes it convenient for operators to recharge in time.

[0023] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention features an independent open-type power battery installation compartment with external openings at both ends and a removable battery inspection and maintenance cover. Battery inspection and replacement can be completed without disassembling the entire machine casing, making equipment maintenance more convenient.

[0024] 2. The vehicle adopts a layered support frame with axle protective sleeves for supporting the steering transmission components, rationally plans the internal space, ensures stable assembly of the drive shaft, and ensures reliable steering transmission.

[0025] 3. The multi-layer towing bracket at the rear of the vehicle, combined with the observation ring, is suitable for various trailer heights. At the same time, the entire vehicle is equipped with multiple sets of lighting warning lights to improve the convenience of trailer docking and the safety of on-site operations. Attached Figure Description

[0026] To illustrate the technical solutions in the embodiments of the present invention or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0027] Figure 1 This is a schematic diagram of the overall structure of the traction trolley of the present invention; Figure 2 This is a schematic diagram of the traction component installation structure in this invention; Figure 3 This is a schematic diagram of the installation structure of the drive wheel and steering wheel in this invention; Figure 4 This is a schematic diagram of the steering transmission mechanism in this invention; Figure 5 This is a schematic diagram of the installation structure of the power battery installation compartment in this invention; Figure 6 This is a schematic diagram of the overall protective shell structure of the device in this invention; Figure 7 This is a schematic diagram of the upper and lower protective sleeve installation structure in this invention; Figure 8 This is a schematic diagram of the flange mounting plate installation structure in this invention; Figure 9 This is a schematic diagram of the transmission shaft sleeve installation structure in this invention.

[0028] In the diagram: 1-Chassis frame; 2-Drive wheel; 3-Steering wheel; 4-Complete protective shell; 5-Control console; 6-Operating handle; 7-Protective backplate; 8-Battery maintenance cover; 9-Fixing plate; 10-Tethering plate; 11-Tethering column; 12-Extended observation rod; 13-Observation ring; 14-Upper steering drive shaft; 15-First steering rocker arm seat; 16-Transverse transmission rod; 17-Second steering rocker arm seat; 18-Lower steering drive shaft; 19-Wheel seat; 20-Left side support cover; 21-Right side support cover; 22-Power battery installation compartment; 23-Positioning support plate; 24-Handle; 25-Bearing base; 26-Supporting upright plate; 27-Handle base frame; 28-Upper shaft protective sleeve; 29-Lower shaft protective sleeve; 30-Flange mounting plate; 31-Drive shaft sleeve; 32-Drive keyway; 33-Drive key; 34-Nut ring; 35-Taillight; 36-Dual-color flowing side light; 37-Warning light; 38-LED spotlight; 39-Inspection cover plate; 40-Charging interface. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Reference Figure 1-9A multi-functional warehouse traction trolley includes a chassis 1. A rear drive axle assembly is mounted at the rear bottom of the chassis 1. The rear drive axle is powered by an onboard battery. Drive wheels 2 are mounted on the output shafts at both ends of the rear axle, providing forward and reverse power. A set of steering wheels 3 is centrally mounted at the front of the chassis 1. The two drive wheels 2 and the single steering wheel 3 form a three-point wheel system layout with a front-one and rear-two triangle. This layout provides stability, a small turning radius, and suitability for passage through narrow workshop aisles. The entire chassis 1 is covered with a protective outer casing. Shell 4 encloses the internal battery, electronic control, and transmission components to prevent dust and impact damage to the internal components. The control console 5 is located at the top center of the protective shell 4. The control console 5 is symmetrically equipped with operating handles 6 on the left and right sides. The operator can control the movement and steering of the vehicle by holding the operating handles 6. The protective back plate 7 is vertically welded to the top rear side of the chassis 1. The protective back plate 7 serves as the mounting base for the rear traction component and also separates the standing area for the operator. The traction component is uniformly installed at the bottom rear side of the protective back plate 7 for connecting to the factory material trailer.

[0031] The steering action is achieved by the entire steering transmission mechanism. The upper steering transmission shaft 14 is vertically fixed at the center of the bottom surface of the control console 5. Turning the operating handle 6 can synchronously drive the upper steering transmission shaft 14 to rotate. The lower end of the upper steering transmission shaft 14 is connected to the first steering rocker arm seat 15. The two ends of the bottom of the first steering rocker arm seat 15 are respectively hinged to the transverse transmission rods 16. The other ends of the two transverse transmission rods 16 are respectively hinged to the top ends of the second steering rocker arm seat 17, forming a symmetrical linkage transmission structure. The second steering rocker arm seat 17 is fixedly mounted on the top of the lower steering transmission shaft 18. The lower end of the lower steering transmission shaft 18 is fixedly connected to the wheel seat 19, and the steering wheel 3 is rotatably mounted on the wheel seat 19. When the operator turns the operating handle 6, the upper steering transmission shaft 14 drives the first steering rocker arm seat 15 to rotate, pulling the transverse transmission rods 16 on both sides to swing synchronously, causing the second steering rocker arm seat 17, the lower steering transmission shaft 18, the wheel seat 19 and the steering wheel 3 to deflect as a whole, completing the steering action of the whole vehicle.

[0032] The protective backplate 7 and the protective shell 4 of the whole machine are reserved with a standing space for an adult to stand. The operator can stand in this area and move with the vehicle without having to walk and tow the trailer alone. The protective backplate 7 has integrated bent protective edges on the left and right sides of the front side. The edges simply limit the operator's position and prevent the operator's body from sliding out of the vehicle during the journey, thus improving the safety of the operation.

[0033] The towing assembly is mounted on the bottom rear side of the protective backplate 7 via a fixing plate 9, which is secured by multiple sets of fasteners. Multiple horizontal towing plates 10 are arranged vertically at intervals on the rear side of the fixing plate 9. The towing column 11 runs coaxially through all the towing plates 10 from top to bottom. The multi-layer towing plates are separated into multiple sets of hook-up points at different heights by the towing column 11, which can match the towing pins of trailers of different heights. The towing column 11 connects the multi-layer plates into a whole, improving the overall load-bearing strength of the towing structure. The top of the towing column 11 extends upward to form an extended observation rod 12, and the upper end of the extended observation rod 12 has an integrally formed observation ring 13. The operator can quickly locate the position of the trailer towing pin behind by observing the observation ring 13, which helps to complete the trailer docking operation.

[0034] The top surface of the chassis 1 is equipped with a left-side support cover 20 and a right-side support cover 21, which are arranged in parallel and spaced apart, and are all housed inside the protective shell 4. The hollow area between the left-side support cover 20 and the right-side support cover 21 forms the power battery installation compartment. The power battery is placed inside the compartment, and the two side covers provide lateral protection for the battery to avoid squeezing and collision caused by driving bumps. The power battery installation compartment extends to the left and right ends of the vehicle body to the outside of the protective shell 4. The compartment has openings at both ends for disassembly and assembly. The battery inspection and maintenance cover 8 can be removed and installed at the openings. When replacing or repairing the power battery, only the corresponding side battery inspection and maintenance cover 8 needs to be removed, without removing the protective shell, which is simple to operate.

[0035] A positioning support plate 23 is fixed to the bottom side of the sealing plate. After assembly, the bottom surface of the positioning support plate 23 is attached to the upper surface of the chassis 1. A waist-shaped hole is opened in the middle of the positioning support plate 23, and a threaded hole is machined at the corresponding position on the chassis 1. The bolt passes through the waist-shaped hole and the threaded hole to lock and fix the positioning support plate 23, thereby completing the fixation of the battery maintenance sealing plate 8. A small left and right adjustment margin is reserved in the waist-shaped hole to eliminate the dimensional error caused by sheet metal processing. A handle 24 is installed on the upper side of the outer side of the battery maintenance sealing plate 8. After the positioning support plate is released, the operator can lift and remove the sealing plate by holding the handle 24.

[0036] The left and right support covers 20 and 21 are supported by a bearing base 25. Support plates 26 are vertically fixed to both sides of the top surface of the bearing base 25. The tops of the two support plates 26 are connected to a handle base frame 27. The bearing base 25, support plates 26, and handle base frame 27 together form a layered support frame, stably supporting the upper control console 5 and steering transmission components. An upper shaft protective sleeve 28 is coaxially fitted on the outside of the upper steering transmission shaft 14, and a lower shaft protective sleeve 29 is coaxially fitted on the outside of the lower steering transmission shaft 18. The transmission shafts can rotate inside the sleeves. The tube is fitted with a bearing, which provides stable rotation support for the drive shaft. The handle base 27 and the bearing base 25 are respectively opened with corresponding through holes. The upper shaft protective sleeve 28 and the lower shaft protective sleeve 29 pass through the corresponding through holes. The outer wall of the sleeve is radially fixed with a flange mounting plate 30. The flange mounting plate 30 is locked to the corresponding handle base 27 and bearing base 25 with bolts, which is convenient for disassembly and assembly. At the same time, a rectangular opening is opened at the top of the whole machine protective shell 4 corresponding to the flange mounting plate 30, which facilitates the extension of the upper steering drive shaft 14 to its outside and its connection with the control console 5.

[0037] Both the first steering rocker arm seat 15 and the second steering rocker arm seat 17 have drive shaft sleeves 31 fixed inside, which serve as the load-bearing base of the rocker arm seat. The lower end of the upper steering drive shaft 14 and the top end of the lower steering drive shaft 18 are machined with external thread sections. The outer diameter of the thread section is smaller than the outer diameter of its main drive shaft. The outer wall of the thread section has a drive keyway 32 opened along the axial direction. The drive shaft sleeve 31 is slidably fitted on the outside of the thread section. The inner wall of the drive shaft sleeve 31 is integrally formed with a drive key 33, which is inserted into the drive keyway 32. The steering torque is transmitted synchronously by the key and the keyway. The outer side of the thread section is screwed with a nut ring 34, which is close to the end face of the drive shaft sleeve 31. The other end face of the drive shaft sleeve 31 abuts against the stepped surface formed by the drive shaft and the thread section, and also abuts against the inner ring of the bearing. This helps to restrict the axial sliding of the drive shaft sleeve 31 along the drive shaft, ensuring the stability of the rocker arm seat assembly position and avoiding transmission backlash during long-term driving.

[0038] The vehicle is equipped with lighting components in multiple locations. The rear ends of the protective backplate 7 are fitted with marker taillights 35, the sides of the protective shell 4 are fitted with dual-color flowing side lights 36, the top of the arc-shaped transition section between the front and top surfaces of the protective shell 4 is fitted with a warning light 37, and the front sides of the protective shell 4 are fitted with LED spotlights 38. During the transfer operation, the various lights can serve as illumination and vehicle warning functions, reminding people around to avoid the area, effectively reducing the probability of collision accidents in the workshop and improving the overall safety of the operation.

[0039] A maintenance port is provided in the middle of the front side of the protective shell 4. The maintenance port is equipped with a detachable maintenance cover 39. After removing the maintenance cover 39, the internal electrical control circuits of the vehicle can be inspected and maintained. The side of the maintenance cover 39 integrates a charging interface 40, which is directly connected to the power battery. The charging gun is plugged into the front of the vehicle for convenient operation. The control console 5 is equipped with a power display instrument. The instrument collects the power battery power data in real time and displays the remaining power intuitively. The operator can complete the charging operation in time according to the instrument value. The maintenance port also serves the functions of circuit inspection and charging interface installation, reducing the number of openings in the protective shell 4 and simplifying the shell processing structure.

[0040] Working principle: During operation, the operator stands in the area between the protective backplate 7 and the protective shell 4, holding the control handles 6 on both sides of the control console 5 to control the vehicle's forward and backward movement. When the control handles 6 are turned, the upper steering drive shaft 14 rotates synchronously, transmitting deflection torque through the first steering rocker arm seat 15, the lateral transmission rod 16, the second steering rocker arm seat 17, and the lower steering drive shaft 18, driving the front steering wheel 3 to deflect and achieve steering. The rear of the vehicle is attached to a trailer via the multi-layer towing bracket 10 on the towing column 11. During attachment, the docking position can be confirmed using the observation ring 13 at the top of the extended observation rod 12. The power battery provides the driving force. The rear axle, all vehicle lights, and electronic control system are powered. The remaining power can be viewed through the power display instrument on the control console 5. When the power is low, the charging gun can be plugged into the charging port 40 on the side of the inspection cover 39 to charge. If the power battery needs to be inspected or replaced, remove the fixing of the positioning support plate 23 to the chassis 1, then pull the handle 24 to remove the battery inspection cover 8, and take out the battery directly from both sides of the vehicle body. During vehicle operation, the marker taillights 35, dual-color flowing side lights 36, and warning lights 37 work simultaneously, and the front LED spotlights 38 provide front road lighting, ensuring the safety of workshop transfer operations in all aspects.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-functional warehouse traction trolley, comprising a chassis (1), characterized in that, The rear end of the chassis (1) is equipped with a drive rear axle assembly, and the output shafts on both sides of the drive rear axle assembly are respectively connected to drive wheels (2). The bottom of the front end of the chassis (1) is equipped with a steering wheel (3), and the two drive wheels (2) and the steering wheel (3) are arranged in a three-point triangular wheel system. The chassis (1) is equipped with a protective shell (4) on the upper part. The protective shell (4) is equipped with a control console (5) at the top. The control console (5) is symmetrically equipped with operating handles (6) on both sides. The bottom of the control console (5) is connected to the steering wheel (3) through a steering transmission mechanism to drive the steering wheel (3) to complete the steering action. The chassis (1) has a protective back plate (7) vertically fixed at the top rear end, and a traction assembly is installed at the bottom rear side of the protective back plate (7). The steering transmission mechanism includes an upper steering transmission shaft (14) vertically fixed to the middle of the bottom of the control console (5). The lower end of the upper steering transmission shaft (14) is connected to the first steering rocker arm seat (15). Both ends of the bottom of the first steering rocker arm seat (15) are hinged with transverse transmission rods (16). The other ends of the two transverse transmission rods (16) are respectively hinged to the top ends of the second steering rocker arm seat (17). The second steering rocker arm seat (17) is fixedly mounted on the top of the lower steering transmission shaft (18). The lower end of the lower steering transmission shaft (18) is fixedly connected with a wheel seat (19). The steering wheel (3) is rotatably mounted on the wheel seat (19).

2. The multi-functional warehouse traction trolley according to claim 1, characterized in that, There is an operating and standing space between the protective back plate (7) and the whole machine protective shell (4), and the front two ends of the protective back plate (7) are integrally bent and formed with protective guards.

3. The multi-functional warehouse traction trolley according to claim 1, characterized in that, The traction assembly includes a fixing plate (9) that is locked and fixed to the bottom of the rear side of the protective back plate (7) by fasteners. Multiple horizontally arranged traction hanging plates (10) are arranged at intervals along the vertical direction on the rear side of the fixing plate (9). A traction column (11) is coaxially and vertically inserted between the multiple traction hanging plates (10). The top of the traction column (11) is provided with an extended observation rod (12), and the upper end of the extended observation rod (12) is integrally formed with an observation ring (13).

4. The multi-functional warehouse traction trolley according to claim 1, characterized in that, The top of the chassis (1) is provided with a left support cover (20) and a right support cover (21). The left support cover (20) and the right support cover (21) are arranged at intervals and both are located inside the whole machine protective shell (4). The hollow area between the left support cover (20) and the right support cover (21) constitutes the power battery installation compartment (22). The two ends of the power battery installation compartment (22) extend to the outside of the whole machine protective shell (4). The battery maintenance sealing plate (8) can be detached and installed at the end opening of the compartment.

5. A multi-functional warehouse traction trolley according to claim 4, characterized in that, The battery maintenance cover plate (8) is equipped with a handle (24) on the upper side of its outer surface and a positioning support plate (23) is fixedly connected to the bottom side. The lower surface of the positioning support plate (23) is attached to the upper surface of the chassis (1). The positioning support plate (23) has a waist-shaped hole in the middle. The chassis (1) has a threaded hole corresponding to the waist-shaped hole. The positioning support plate (23) is detachably locked to the chassis (1) by bolts passing through the waist-shaped hole and engaging with the threaded hole.

6. A multi-functional warehouse traction trolley according to claim 4, characterized in that, The top of the left support cover (20) and the right support cover (21) are jointly equipped with a horizontally arranged bearing base (25). The top two sides of the bearing base (25) are vertically fixed with support plates (26), and the upper ends of the two support plates (26) are jointly fixed with a handle base frame (27). The upper steering drive shaft (14) is coaxially fitted with an upper shaft protective sleeve (28), and the lower steering drive shaft (18) is coaxially fitted with a lower shaft protective sleeve (29). The upper and lower sections of the shaft bodies of the upper steering drive shaft (14) and the lower steering drive shaft (18) are equipped with rolling bearings, and the rolling bearings form a rotating pair with the upper shaft protective sleeve (28) and the lower shaft protective sleeve (29) respectively. The handle base (27) and the bearing base (25) are respectively provided with through holes for the upper shaft protective sleeve (28) and the lower shaft protective sleeve (29) to move through. The outer walls of the upper shaft protective sleeve (28) and the lower shaft protective sleeve (29) are radially fixed with flange mounting plates (30), and are respectively locked and fixed to the handle base (27) and the bearing base (25) by the flange mounting plates (30).

7. A multi-functional warehouse traction trolley according to claim 6, characterized in that, The first steering rocker arm seat (15) and the second steering rocker arm seat (17) are both fixed with a transmission shaft sleeve (31). The lower end of the upper steering transmission shaft (14) and the top end of the lower steering transmission shaft (18) are both machined with external thread sections. The outer wall of the external thread section is provided with a transmission keyway (32) along the axial direction. The transmission shaft sleeve (31) is slidably fitted on the outside of the external thread section. The inner wall of the transmission shaft sleeve (31) is provided with a transmission flat key (33) that matches the transmission keyway (32). The outer thread of the external thread section is threaded with a nut ring (34) for axially limiting and locking the transmission shaft sleeve (31).

8. A multi-functional warehouse traction trolley according to claim 1, characterized in that, Both ends of the rear side of the protective back plate (7) are equipped with outline taillights (35), both sides of the protective shell (4) are equipped with dual-color flowing side lights (36), the front side of the protective shell (4) and the top wall are provided with an arc-shaped section, the top of the arc-shaped section is equipped with a warning light (37), and both sides of the front end of the protective shell (4) are equipped with LED lighting spotlights (38).

9. A multi-functional warehouse traction trolley according to claim 1, characterized in that, The protective shell (4) of the whole machine has an inspection port in the middle of the front side, and an inspection sealing plate (39) is installed at the inspection port. The side of the inspection sealing plate (39) is integrated with a charging interface (40). The control console (5) is equipped with a power display instrument.

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