An electrically assisted trolley and handle control structure therefor

Abstract

The utility model discloses an electric power-assisted carrier and handle control structure thereof, include: handle, including handle shell and handle rod, be equipped with first retreat sensor, second retreat sensor and advance sensor in handle shell, be equipped with first adhesive tape for triggering advance sensor, second adhesive tape for triggering first retreat sensor and third adhesive tape for triggering second retreat sensor on handle shell, connecting seat can rotatable setting in the lower extreme of handle rod, interlock sensor installs on connecting seat, and interlock sensor is configured as generating different detection signal and converting into corresponding electric signal transmission to controller according to the rotating position of handle, controller is connected with interlock sensor, first retreat sensor, second retreat sensor and advance sensor. The technical scheme can reduce the number of control components, greatly reduce the hardware cost, and the structure is simple, and the cost is lower by adopting adhesive tape triggering advance sensor and two retreat sensors.

Description

Technical Field

[0001] This utility model relates to the field of handling vehicle technology, and in particular to an electric-assisted handling vehicle and its handle control structure. Background Technology

[0002] Electric pallet trucks, as logistics handling equipment used for moving goods, are powered by batteries and motors. The vehicle moves via gear transmission, and the forks are raised using a DC motor and hydraulic transmission, which drives cylinders to move the forks up and down to lift the forks and goods. Existing electric pallet trucks mainly suffer from the following problems: 1. Electric pallet trucks typically include accelerators, emergency reverse mechanisms, and keys, resulting in higher costs; 2. Electric pallet trucks are usually controlled by rotary buttons on a handle, leading to low control precision and a tendency for accidental activation; 3. Different electrical faults require different fault indications from the controller, necessitating more control hardware, resulting in high control complexity and cost. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide an electric-assisted transport vehicle with a simple structure and low cost and its handle control structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A handle control structure, comprising:

[0006] The handle includes a handle housing and a handle bar fixedly connected to the handle housing. The handle housing is provided with a first backward sensor, a second backward sensor and a forward sensor. The handle housing is provided with a first rubber strip for triggering the forward sensor, a second rubber strip for triggering the first backward sensor and a third rubber strip for triggering the second backward sensor. The first backward sensor, the second backward sensor and the forward sensor are respectively configured to transmit corresponding trigger signals to the controller when triggered.

[0007] The connecting seat is rotatably located at the lower end of the handle lever;

[0008] An interlock sensor, mounted on a connector, is configured to generate different detection signals based on the rotational position of the handle and convert them into corresponding electrical signals for transmission to the controller.

[0009] The controller is connected to an interlock sensor, a first backward sensor, a second backward sensor, and a forward sensor. The controller is configured to turn the first backward sensor, the second backward sensor, and the forward sensor on or off based on an electrical signal emitted by the interlock sensor.

[0010] Preferably, the connecting seat is provided with a shaft cylinder, and a trigger and an elastic element are provided inside the shaft cylinder. One end of the trigger is connected to the lower end of the handle rod, and the other end of the trigger is connected to the shaft cylinder through the elastic element. Rotating the handle can drive the trigger to reciprocate along the axis inside the shaft cylinder. The interlock sensor is configured to generate different detection signals according to the position of the trigger inside the shaft cylinder and convert them into corresponding electrical signals for transmission to the controller.

[0011] Preferably, the interlock sensor is a proximity switch, and rotating the handle presses the trigger element, which indirectly triggers the interlock sensor to open or close; and alternatively, the first backward sensor, the second backward sensor, and the forward sensor are each independently selected from the I / O interface or a pressure sensor.

[0012] Preferably, the handle housing includes a first connecting part, a second connecting part, and a third connecting part. The second connecting part and the third connecting part are located on the left and right sides of the handle rod, respectively. The two ends of the first connecting part are respectively connected to the end of the second connecting part away from the connecting seat and the end of the second connecting part away from the connecting seat. The first adhesive strip is disposed on the first connecting seat and is disposed along the length direction of the first connecting seat. The second adhesive strip is disposed on the second connecting seat and is disposed along the length direction of the second connecting seat. The third adhesive strip is disposed on the third connecting seat and is disposed along the length direction of the third connecting seat.

[0013] Preferably, the handle housing is also provided with a lifting button for controlling the lifting of the hydraulic component and a handle for controlling the lowering of the hydraulic component.

[0014] An electric-assisted transport vehicle, comprising:

[0015] The front frame includes a frame body, a battery structure mounted on the frame body, and two linkage wheel assemblies disposed on the left and right sides of the bottom of the frame body.

[0016] The rear frame, which can be detached from the front frame, includes the aforementioned handle control structure, hydraulic assembly, load-bearing assembly, and drive assembly. The hydraulic assembly is mounted on the connecting seat, and its top is movably mounted on the front frame. The middle part of the load-bearing assembly is rotatably mounted on the connecting seat. Both ends of the load-bearing assembly are hinged to a connecting wheel assembly, and both ends of the load-bearing assembly are fixedly connected to a set of universal wheels. The upper end of the drive assembly is fixedly connected to the connecting seat.

[0017] Preferably, a hydraulic cylinder is provided on the side of the connecting seat away from the handle rod. The middle part of the bearing assembly is sleeved on the hydraulic cylinder and rotates relative to the hydraulic cylinder. The hydraulic cylinder is fixed to the upper end of the drive assembly. The hydraulic assembly includes a hydraulic motor, a hydraulic station, and a push rod. The push rod is set inside the hydraulic cylinder and can reciprocate along the axis inside the hydraulic cylinder. The hydraulic motor is connected to the controller and the hydraulic station. The hydraulic motor is used to control the hydraulic station to supply oil to the hydraulic cylinder to lift the push rod. The hydraulic motor can control the push rod. A pressure plate connected to the pressure relief valve is provided on the hydraulic station. The handle is connected to the pressure plate through a pull cable.

[0018] Preferably, the frame has two forward-extending forks, and two linkage wheel assemblies are respectively located below the two forks. The linkage wheel assembly includes a connecting arm, a wheel frame, and several wheels. The distal end of the connecting arm is hinged to the proximal end of the wheel frame, the middle part of the wheel frame is hinged to the forks of the frame, and the several wheels are rotatably located at the distal end of the wheel frame. The load-bearing assembly includes a load-bearing bridge and two axle ears respectively hinged to both ends of the load-bearing bridge. The middle part of the load-bearing bridge is sleeved on the connecting seat, the upper part of the axle ear away from the load-bearing bridge is hinged to the frame, and the lower part of the axle ear away from the load-bearing bridge is hinged to the proximal end of the connecting arm in the linkage wheel assembly.

[0019] Preferably, the drive assembly includes a wheel frame, a drive motor, a gearbox, and a drive wheel. The gearbox is detachably mounted on one side of the wheel frame and includes a gear set with an output shaft at its output end. The drive motor is mounted on the gearbox and connected to the input end of the gear set, inputting power to the gear set. The drive wheel is rotatably mounted on the wheel frame, with a first mounting hole at its center. When the gearbox is mounted on the wheel frame, the output shaft of the gearbox passes through the first mounting hole of the drive wheel and is connected to the drive wheel in a non-rotatable manner. The drive motor is connected to and controlled by a controller.

[0020] Preferably, one side of the frame is provided with a battery slot for mounting the battery structure. The battery slot has at least one elastic limiting member on its wall. The elastic limiting member includes a first end and a second end, and the first end and the second end of the elastic limiting member are connected by an acute-angled arc transition. The first end of the elastic limiting member is fixedly connected to the wall of the battery slot, and the second end of the elastic limiting member is located inside the battery slot. When the battery structure is installed in the battery slot, the second end of the elastic limiting member is deformed by pressure and abuts against the battery mounting structure.

[0021] In this solution, the electric-assisted transport vehicle's speed is set to no more than 4.0 km / h in the controller.

[0022] This utility model, by adopting the above technical solutions, has the following beneficial effects: 1. In this utility model, by eliminating components such as the accelerator, key, and emergency reverse mechanism, and by using a rubber strip to trigger the forward sensor and two backward sensors, the number of control elements can be reduced, significantly lowering hardware costs; 2. In this utility model, the interlock sensor is configured to generate different detection signals based on the rotation position of the handle and convert them into corresponding electrical signals transmitted to the controller. The controller connects or disconnects the first backward sensor, the second backward sensor, and the forward sensor based on the electrical signals emitted by the interlock sensor, thereby realizing the automatic switching of the electric-assisted transport vehicle between forward and backward modes. The forward and backward modes alternately start and stop, effectively preventing the operational risks caused by accidental contact with the rubber strip on the handle. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the electric-assisted transport vehicle in this utility model;

[0024] Figure 2 This is an exploded view of the electric-assisted transport vehicle in this utility model.

[0025] Figure 3 This is a schematic diagram of the handle structure in this utility model;

[0026] Figure 4 This is an exploded view of the connecting seat in this utility model;

[0027] Figure 5 This is a schematic diagram of the connection structure of the handle, connecting seat and interlocking sensor in this utility model;

[0028] Figure 6 This is a schematic diagram of the connecting rod wheel assembly in this utility model;

[0029] Figure 7 This is a structural schematic diagram of the load-bearing component in this utility model;

[0030] Figure 8 This is a schematic diagram of the drive assembly in this utility model;

[0031] Figure 9 This is an exploded view of the drive assembly;

[0032] Figure 10 This is a cross-sectional structural diagram of the drive assembly;

[0033] Figure 11 This is a structural schematic diagram of an elastic limiting component.

[0034] Figure label:

[0035] 100. Controller;

[0036] 1. Handle; 11. Handle housing; 111. First connecting part; 112. Second connecting part; 113. Third connecting part; 12. Handle rod; 13. First rubber strip; 14. Second rubber strip; 15. Third rubber strip; 16. Lifting button; 17. Handle; 18. Pull cable;

[0037] 2. Connecting seat; 21. Shaft cylinder; 22. Trigger; 23. Elastic element; 24. Hydraulic cylinder;

[0038] 3. Interlock sensor;

[0039] 4. Frame; 41. Leg; 42. Battery slot; 43. Elastic limiting component; 431. First end; 432. Second end;

[0040] 5. Battery structure;

[0041] 6. Linkage wheel assembly; 61. Connecting arm; 62. Wheel carrier; 63. Wheel;

[0042] 7. Hydraulic components; 71. Hydraulic motor; 72. Hydraulic station; 721. Pressure plate; 73. Push rod;

[0043] 8. Load-bearing components; 81. Caster wheel assembly; 82. Load-bearing axle; 83. Axle lugs;

[0044] 9. Drive assembly; 91. Wheel frame; 92. Drive motor; 93. Gearbox; 94. Drive wheel. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] like Figures 1 to 11 As shown, this utility model discloses an electric-assisted transport vehicle, comprising:

[0051] The front frame includes a frame body 4, a battery structure 5 mounted on the frame body 4, and two linkage wheel assemblies 6 disposed on the left and right sides of the bottom of the frame body 4.

[0052] The rear frame, which can be detached from the front frame, includes a handle control structure, a hydraulic component 7, a load-bearing component 8, and a drive assembly 9. The hydraulic component 7 is mounted on the connecting seat 2, and the top of the hydraulic component 7 is movably mounted on the front frame. The middle part of the load-bearing component 8 is rotatably mounted on the connecting seat 2. Both ends of the load-bearing component 8 are respectively hinged to a connecting wheel assembly 6, and both ends of the load-bearing component 8 are respectively fixedly connected to a universal wheel set 81. The upper end of the drive assembly 9 is fixedly connected to the connecting seat 2.

[0053] In this electric-assisted pallet truck, the speed of the drive wheels in the drive assembly 9 set in the controller 100 does not exceed 4.0 km / h.

[0054] In this design, components such as the accelerator, key, and emergency reverse mechanism have been removed, and the handle control structure has been modified. Specifically, as follows... Figures 2 to 5 As shown, in this utility model, the handle control structure includes:

[0055] The handle 1 includes a handle housing 11 and a handle rod 12 fixedly connected to the handle housing 11. The handle housing 11 is provided with a first backward sensor, a second backward sensor and a forward sensor. The handle housing 11 is provided with a first adhesive strip 13 for triggering the forward sensor, a second adhesive strip 14 for triggering the first backward sensor and a third adhesive strip 15 for triggering the second backward sensor. The first backward sensor, the second backward sensor and the forward sensor are respectively configured to transmit the corresponding trigger signal to the controller 100 when triggered.

[0056] The connecting seat 2 is rotatably disposed at the lower end of the handle rod 12;

[0057] Interlock sensor 3 is installed on connector 2. Interlock sensor 3 is configured to generate different detection signals according to the rotation position of handle 1 and convert them into corresponding electrical signals to be transmitted to controller 100.

[0058] The controller 100 is connected to the interlock sensor 3, the first backward sensor, the second backward sensor, and the forward sensor. The controller 100 is configured to turn the first backward sensor, the second backward sensor, and the forward sensor on or off according to the electrical signal emitted by the interlock sensor 3.

[0059] In this way, by using a rubber strip to trigger the forward sensor and two backward sensors, the number of control components can be reduced, significantly lowering hardware costs. Furthermore, the interlock sensor 3 is configured to generate different detection signals based on the rotation position of the handle 1 and convert them into corresponding electrical signals, which are then transmitted to the controller 100. The controller 100 connects or disconnects the first backward sensor, the second backward sensor, and the forward sensor based on the electrical signals emitted by the interlock sensor 3, thereby enabling the electric-assisted pallet truck to automatically switch between forward and backward modes. The forward and backward modes alternately activate and deactivate, effectively preventing operational risks caused by accidental contact with the rubber strip on the handle 1.

[0060] Furthermore, the connecting seat 2 is provided with a shaft cylinder 21, and a trigger 22 and an elastic element 23 are provided inside the shaft cylinder 21. One end of the trigger 22 is connected to the lower end of the handle rod 12, and the other end of the trigger 22 is connected to the shaft cylinder 21 through the elastic element 23. Rotating the handle 1 can drive the trigger 22 to reciprocate along the axis inside the shaft cylinder 21. The interlock sensor 3 is configured to generate different detection signals according to the position of the trigger 22 inside the shaft cylinder 21 and convert them into corresponding electrical signals to be transmitted to the controller 100.

[0061] In this embodiment, the interlock sensor 3 is a proximity switch. Rotating the handle 1 presses the trigger 22, indirectly triggering the interlock sensor 3 to open or close. Of course, in other embodiments, the interlock sensor 3 can also be one of the following: a micro switch, a pressure sensor, a millimeter-wave radar sensor, an infrared sensor, a capacitive sensor, an inductive sensor, or an ultrasonic sensor. The appropriate sensor can be selected and installed according to the actual situation.

[0062] Taking a 3-position proximity switch with an interlocking sensor as an example, the trigger element 22 has a protrusion or recess in the middle relative to its two ends. When the protrusion or recess in the middle of the trigger element 22 approaches the proximity switch, it can trigger the proximity switch to open, and the proximity switch generates a second electrical signal; otherwise, the proximity switch is closed, and the proximity switch generates a first electrical signal. Thus, rotating the handle 1 drives the trigger element 22 to move within the shaft cylinder 21 until the protrusion or recess in the middle of the trigger element 22 approaches the proximity switch, triggering the proximity switch to open. The rotation range of the handle 1 from vertical to the point where it can initially trigger the proximity switch is the first position range. The rotation range of the handle 1 that triggers the proximity switch is the second position range. The rotation range of the handle 1 until the elastic element 23 is compressed to its limit or the handle 1 is rotated to its limit is the third position range. Therefore, the rotation angle of the handle 1 that triggers the proximity switch can be adjusted by adjusting the length of the protrusion or recess in the middle of the trigger element 22.

[0063] In one implementation, the first backward sensor, the second backward sensor, and the forward sensor are each an I / O interface. In this way, triggering the first backward sensor, the second backward sensor, and the forward sensor can only cause the drive motor 92 to rotate at a set speed. Although this method cannot adjust the speed of the electric-assisted transport vehicle, the control logic and control elements are simple and the hardware cost is low. Alternatively, multiple speed levels can be set in the controller, and the speed levels can be switched by setting an additional slow button, thereby making the speed of the electric-assisted transport vehicle adjustable.

[0064] In another implementation, the first backward sensor, the second backward sensor, and the forward sensor are all pressure sensors. This allows the speed of the electric-assisted pallet truck to be adjusted based on the pressure applied by the user when triggering the first backward sensor, the second backward sensor, and the forward sensor; for example, a heavier press results in a faster speed, and a lighter press results in a slower speed.

[0065] In this design, the handle housing 11 includes a first connecting part 111, a second connecting part 112, and a third connecting part 113. The second connecting part 112 and the third connecting part 113 are located on the left and right sides of the handle 12, respectively. The two ends of the first connecting part 111 are connected to the ends of the second connecting part 112 and the third connecting part 113 away from the connecting seat 2, respectively. The first adhesive strip 13 is disposed on the first connecting part 111 and is disposed along the length of the first connecting part 111. The second adhesive strip 14 is disposed on the second connecting part 112 and is disposed along the length of the second connecting part 112. The third adhesive strip 15 is disposed on the third connecting part 113 and is disposed along the length of the third connecting part 113. That is, when the handle 12 is vertical, the first adhesive strip 13 on the handle 1 is horizontally disposed, while the second adhesive strip 14 and the third adhesive strip 15 are vertically disposed. This arrangement facilitates the operator's grip and prevents accidental operation.

[0066] In this solution, the handle housing 11 is also provided with a lifting button 16 for controlling the lifting of the hydraulic component and a handle 17 for controlling the lowering of the hydraulic component. The lifting button 16 is connected to the controller 100.

[0067] like Figure 2 and Figure 4 As shown, the connecting seat 2 is provided with a hydraulic cylinder 24 on the side away from the handle rod 12. The middle part of the bearing assembly 8 is sleeved on the hydraulic cylinder 24 and rotates relative to the hydraulic cylinder 24. The hydraulic cylinder 24 is fixed to the upper end of the drive assembly 9. The hydraulic assembly 7 includes a hydraulic motor 71, a hydraulic station 72 and a push rod 73. The upper end of the push rod 73 is connected to the frame. The push rod 73 is set in the hydraulic cylinder 24 and can move back and forth along the axis in the hydraulic cylinder 24. The hydraulic motor 71 is connected to the controller 100 and the hydraulic station 72. The hydraulic motor 71 is used to control the hydraulic station 72 to supply oil to the hydraulic cylinder 24 to lift the push rod 73. The hydraulic station 72 is provided with a pressure plate 721 connected to the pressure relief valve. The handle 17 is connected to the pressure plate 721 through the pull wire 18. When the operator needs to lift the goods, press the lifting button 16 to start the hydraulic motor 71. The hydraulic station 72 supplies oil to the cylinder 24 to lift the top rod 73, thereby driving the frame 4 to lift. When the operator needs to place the goods, pull the handle 17 to pull the pressure plate 721 to open the pressure relief valve. The oil cylinder 24 returns oil to the hydraulic station 72, the top rod 73 descends, thereby driving the frame 4 to descend.

[0068] like Figure 2 , Figure 5 and Figure 8As shown, the frame 4 has two forward-extending fork legs 41, and two linkage wheel assemblies 6 are respectively located below the two fork legs 41. The linkage wheel assembly 6 includes a connecting arm 61, a wheel frame 62, and several wheels 63. The far end of the connecting arm 61 is hinged to the near end of the wheel frame 62, the middle part of the wheel frame 62 is hinged to the fork legs 41 of the frame 4, and the several wheels 63 are rotatably located at the far end of the wheel frame 62. The load-bearing assembly 8 includes a load-bearing bridge 82 and two bridge ears 83 respectively hinged to both ends of the load-bearing bridge 82. Two universal wheel sets 81 are respectively installed at both ends of the load-bearing bridge 82. The middle part of the load-bearing bridge 82 is sleeved on the lower end of the hydraulic cylinder 24 of the connecting seat 2. The upper part of the bridge ear 83 away from the load-bearing bridge 82 is hinged to the frame 4, and the lower part of the bridge ear 83 away from the load-bearing bridge 82 is hinged to the near end of the connecting arm 61 in the linkage wheel assembly 6. In this way, when the frame 4 is lifted, the wheels 63 in the linkage wheel assembly 6 can still contact the ground for rolling support.

[0069] like Figure 1 , Figure 2 and Figure 11 As shown, a battery slot 42 for installing the battery structure 5 is provided on one side of the frame 4. At least one elastic limiting member 43 is on the wall of the battery slot 42. The elastic limiting member 43 includes a first end 431 and a second end 432. The first end 431 and the second end 432 of the elastic limiting member 43 are connected by an acute-angled arc transition. The first end of the elastic limiting member 43 is fixedly connected to the wall of the battery slot 42. The second end 432 of the elastic limiting member 43 is located inside the battery slot 42. When the battery structure 5 is installed in the battery slot 42, the second end 432 of the elastic limiting member 43 is deformed by pressure and abuts against the battery structure 5, thereby fixing the battery structure 5 in the battery slot 42. When it is necessary to remove the battery structure 5, the battery structure 5 can be pulled out directly. To prevent damage to the surface of the battery structure 5, the second end 432 of the elastic limiting member 43 is bent to form an arc angle. The arc angle on the second end 432 abuts against the side of the battery structure 5. This can prevent the battery structure 5 from interfering with the second end 432 of the elastic limiting member 43 and thus preventing the battery structure 5 from being pulled out. It can also make the elastic limiting member 43 less prone to deformation and failure.

[0070] The drive assembly can be configured according to actual needs. The drive assembly can be a conventional structure available on the market, or it can be a drive assembly with quick flashlight switching. Since there are many drive assembly structures on the market, this solution will not elaborate further; instead, this solution will describe the drive assembly with quick flashlight switching in more detail.

[0071] like Figures 8 to 10As shown, the drive assembly includes a wheel frame 91, a drive motor 92, a reduction gearbox 93, and a drive wheel 94. The reduction gearbox 93 is detachably mounted on one side of the wheel frame 91 and includes a gear set 931. The output end of the gear set 931 is provided with an output shaft 932. The drive motor 92 is mounted on the reduction gearbox 93 and is connected to the input end of the gear set 931 to input power to the gear set 931. The drive wheel 94 is rotatably mounted on the wheel frame 91 and has a first mounting hole at its center. When the reduction gearbox 93 is mounted on the wheel frame 91, the output shaft 932 of the reduction gearbox 93 passes through the first mounting hole of the drive wheel 94 and is connected to the drive wheel 94 in a non-rotatable manner.

[0072] In normal use, the gearbox 93 is mounted on the wheel frame 91, and the drive motor 92 inputs power to the drive wheel 94 through the gearbox 93, thereby driving the drive wheel 94 to rotate. When the drive motor 92 in the drive assembly fails, the gearbox 93 is removed, and the output shaft 32 of the gearbox 93 is pulled directly out of the first mounting hole of the drive wheel 4. The drive wheel 94 is still rotatably mounted on the wheel frame 91, thus realizing a quick switch from electric to manual handling.

[0073] In this design, the gearbox 93 is bolted to one side of the wheel frame 91. For example... Figure 2 As shown, the output shaft 932 is provided with an external spline 933 at one end for connecting to the drive wheel 94, and an internal spline 942 is fixedly provided in the first mounting hole of the drive wheel 94. The output shaft 932 and the drive wheel 94 are connected by transmission through the external spline 933 and the internal spline 942, and the output shaft 932 and the drive wheel 94 can achieve axial rapid sliding assembly.

[0074] like Figure 8 and Figure 9 As shown, the wheel frame 91 includes a first side cover 911 and a second side cover 912. The upper part of the first side cover 911 is connected to the upper part of the second side cover 912 by fasteners. The first side cover 911 has a second mounting hole 9111, and the second side cover 912 has a third mounting hole 9125. The second mounting hole 9111, the third mounting hole 9125, and the first mounting hole of the drive wheel 94 are coaxial. The drive wheel 94 is located between the first side cover 911 and the second side cover 912. The two ends of the internal spline 942 of the drive wheel 94 are supported in the second mounting hole 9111 of the first side cover 911 and the third mounting hole 9125 of the second side cover 912 by the first bearing 95 and the second bearing 96, respectively. Thus, the shape of the wheel frame 91 limits the axial movement of the drive wheel 94, so that the drive wheel 94 can only rotate circumferentially.

[0075] like Figure 9As shown, a first connecting member 913 is integrally formed on the upper end of the first side cover 911. The first side cover 911 is connected to the second side cover 912 through the first connecting member 913. A space for mounting the drive wheel 94 is formed between the first side cover 911, the first connecting member 913, and the second side cover 912. When the drive wheel 94 is mounted on the wheel frame 91, the drive wheel 94 is located below the first connecting member 913. To further reduce the volume of the wheel frame 91, the side of the first connecting member 913 near the drive wheel 94 is arc-shaped. More specifically, the shape of the side of the first connecting member 913 near the drive wheel 94 should be adapted to the drive wheel 94 and should not hinder the rotation of the drive wheel 94. A vertical fifth connecting member 914 is provided on the first connecting member 913.

[0076] like Figure 9 and Figure 10 As shown, the drive wheel 94 has a first groove 941 on the side near the second side cover 912. The second side cover 912 includes an integrally formed second connector 9121, a third connector 9122, and a fourth connector 9123. The lower end of the second connector 9121 is connected to the fourth connector 9123 through the third connector 9122. To increase the strength of the second side cover 912, multiple reinforcing ribs 9124 are provided between the third connector 9122 and the fourth connector 9123. The second connector 9121 is located on the side of the second side cover 912 away from the first side cover 911. The third mounting hole 125 is opened on the fourth connector 123, and the second side cover 912 is connected to the first side cover 911 through the second connector 9121. The upper surface of the third connector 9122 is arc-shaped. More specifically, the upper surface of the third connector 9122 only needs to be adapted to the drive wheel 94 and not hinder the rotation of the drive wheel 94. Thus, when the drive wheel 94 is mounted on the second side cover 912, the third connector 9122 and the fourth connector 9123 on the second side cover 912 are located within the first groove 941 of the drive wheel 94, thereby significantly reducing the volume of the drive assembly. To facilitate the disassembly and assembly of the drive motor 92 and the gearbox 93, the drive motor 2 is mounted on the side of the gearbox 3 away from the wheel frame 1, which also prevents the drive motor 92 from interfering with the drive wheel 94.

[0077] The gearbox 93 also includes a housing 930, which is detachably mounted on the fourth connector 9123 of the second side cover 912 by fasteners; the gear set 931 is disposed in the housing 930, one end of the output shaft 932 is supported in the housing 930, the other end of the output shaft 932 extends out of the housing 930, and an external spline 933 is disposed at the end of the output shaft 932 that extends out of the housing 930.

[0078] In this design, the gearbox 3 is pre-installed. The gearbox 93 is mounted on the wheel frame 91 using fasteners. The drive wheel 94 is positioned against the wheel frame 91 via the first bearing 95 and the second bearing 96. The first side cover 911 and the second side cover 912 of the wheel frame 91 are then secured with fasteners. Electric handling can be converted to manual handling by removing the drive motor 92 and the gearbox 93, and pulling out the output shaft 932 of the gearbox 93. Furthermore, the user does not need to pull the gearbox 93 and the motor 92 during manual handling, making it more labor-saving. Moreover, the overall structure of this drive assembly is extremely simplified. The limiting of the drive wheel 94 relies on the shape of the wheel frame 91 itself, the first bearing 95, and the second bearing 96, which saves on the use of many standard parts and effectively reduces costs.

[0079] In this utility model, the operating steps for driving the electric-assisted pallet truck are as follows:

[0080] S0. When the power is turned on and the controller 100 is powered on, the controller 100 performs a self-test. If a fault is detected during the self-test, the interlock sensor 3 sends a first electrical signal to the controller 100 to enter the maintenance mode. If there is no fault detected during the self-test, the process proceeds to S1.

[0081] S1. The interlock sensor 3 acquires the detection signal of the position of the handle 1 and generates a corresponding electrical signal, which is transmitted to the controller 100. If the handle 1 is in the first position range or the third position range, the interlock sensor 3 generates a first electrical signal. If the handle 1 is in the second position range, the interlock sensor 3 generates a second electrical signal.

[0082] S2. If the controller 100 receives the first electrical signal, proceed to S3; if the controller 100 receives the second electrical signal, proceed to S4.

[0083] S3. The controller 100 connects the circuits of the first backward sensor and the second backward sensor, disconnects the circuit of the forward sensor, and enters the backward mode.

[0084] S4. The controller 100 connects the circuit of the forward sensor, disconnects the circuit of the first backward sensor and the second backward sensor, and enters the forward mode.

[0085] The reverse mode in S3 includes: the operator presses the second adhesive strip 14 and the third adhesive strip 15 on the handle 1 to trigger the first reverse sensor and the second reverse sensor respectively; the first reverse sensor and the second reverse sensor respectively transmit the trigger signal to the controller 100; if the time interval between the controller 100 receiving the trigger signal of the second adhesive strip 14 and the third adhesive strip 15 is within a set threshold, the controller controls the drive motor 92 to reverse and drive the electric assisted transport vehicle to reverse; otherwise, it returns to S1.

[0086] The forward movement mode in S4 includes: the operator presses the first rubber strip 13 on the handle 1 to trigger the forward movement sensor; the forward movement sensor transmits the trigger signal of the first rubber strip 13 to the controller 100; the controller 100 controls the drive motor 92 to rotate forward, driving the electric-assisted transport vehicle forward.

[0087] The maintenance modes include:

[0088] When handle 1 is in the vertical position (first position range), if the operator presses the first rubber strip 13 and the electric-assisted transport vehicle moves forward, the interlock sensor 3 is faulty and should be replaced. If the electric-assisted transport vehicle cannot move regardless of the position of handle 1 when the operator presses the first rubber strip 13, then either the interlock sensor 3 or the forward sensor is faulty and can be checked by replacing either one.

[0089] If the electric assisted transport vehicle moves when the handle is in the vertical position (first position range) by pressing only the second rubber strip 14, then the second backward sensor is faulty and should be replaced. If the electric assisted transport vehicle moves when the operator presses only the third rubber strip 15, then the first backward sensor is faulty and should be replaced. If the electric assisted transport vehicle cannot move when the operator presses both the second rubber strip 14 and the third rubber strip 15 within the set threshold range, then the problem can be troubleshooted by replacing either the first backward sensor or the second backward sensor.

[0090] In this solution, troubleshooting is quick and easy, and there is no need to set up separate hardware indicators for different electrical faults. The sensor layout and operating logic are simple.

[0091] All features described in the specification, appended claims and drawings, whether individually or in any combination thereof, are essential features of this utility model.

[0092] In the description of this specification, the terms "one embodiment," "some embodiments," "one implementation," "specific implementation," "other implementation," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment, implementation, or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described above can also be combined in any suitable manner in one or more embodiments, implementations, or examples. The technical solutions described in this utility model also include technical solutions formed by any one or more specific features, structures, materials, or characteristics described above, either individually or in combination.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A handle control structure, characterized in that, include: The handle (1) includes a handle housing (11) and a handle rod (12) fixedly connected to the handle housing (11). The handle housing (11) is provided with a first backward sensor, a second backward sensor and a forward sensor. The handle housing (11) is provided with a first rubber strip (13) for triggering the forward sensor, a second rubber strip (14) for triggering the first backward sensor and a third rubber strip (15) for triggering the second backward sensor. The first backward sensor, the second backward sensor and the forward sensor are respectively configured to transmit the corresponding trigger signal to the controller (100) when triggered. The connecting seat (2) is rotatably disposed at the lower end of the handle rod (12); An interlock sensor (3) is installed on a connector (2). The interlock sensor (3) is configured to generate different detection signals according to the rotation position of the handle (1) and convert them into corresponding electrical signals to be transmitted to the controller (100). The controller (100) is connected to the interlock sensor (3), the first back-back sensor, the second back-back sensor and the forward sensor, and the controller (100) is configured to turn the first back-back sensor, the second back-back sensor and the forward sensor on or off according to the electrical signal emitted by the interlock sensor (3).

2. The handle control structure according to claim 1, characterized in that, A shaft cylinder (21) is provided on the connecting seat (2). A trigger (22) and an elastic element (23) are provided inside the shaft cylinder (21). One end of the trigger (22) is connected to the lower end of the handle rod (12), and the other end of the trigger (22) is connected to the shaft cylinder (21) through the elastic element (23). Rotating the handle (1) can drive the trigger (22) to move back and forth along the axis inside the shaft cylinder (21). The interlock sensor (3) is configured to generate different detection signals according to the position of the trigger (22) inside the shaft cylinder (21) and convert them into corresponding electrical signals to be transmitted to the controller (100).

3. The handle control structure according to claim 1, characterized in that, The interlock sensor (3) is a proximity switch. Rotating the handle (1) presses the trigger (22) and indirectly triggers the interlock sensor (3) to open or close; and, the first backward sensor, the second backward sensor and the forward sensor are independently selected from the I / O interface or the pressure sensor.

4. The handle control structure according to claim 1, characterized in that, The handle housing (11) includes a first connecting part (111), a second connecting part (112), and a third connecting part (113). The second connecting part (112) and the third connecting part (113) are located on the left and right sides of the handle rod (12), respectively. The two ends of the first connecting part (111) are connected to the end of the second connecting part (112) away from the connecting seat (2) and the end of the third connecting part (113) away from the connecting seat (2), respectively. The first adhesive strip (13) is disposed on the first connecting part (111) and is disposed along the length direction of the first connecting part (111). The second adhesive strip (14) is disposed on the second connecting part (112) and is disposed along the length direction of the second connecting part (112). The third adhesive strip (15) is disposed on the third connecting part (113) and is disposed along the length direction of the third connecting part (113).

5. A handle control structure according to any one of claims 1-4, characterized in that, The handle housing (11) is also provided with a lifting button (16) for controlling the lifting of the hydraulic component and a handle (17) for controlling the lowering of the hydraulic component.

6. An electric-assisted transport vehicle, characterized in that, include: The front frame includes a frame (4), a battery structure (5) mounted on the frame (4), and two linkage wheel assemblies (6) located on the left and right sides of the bottom of the frame (4). The rear frame, which can be detached from the front frame, includes the handle control structure as described in claim 5, the hydraulic component (7), the load-bearing component (8), and the drive assembly (9). The hydraulic component (7) is mounted on the connecting seat (2), and the top of the hydraulic component (7) is movably mounted on the front frame. The middle part of the load-bearing component (8) is rotatably mounted on the connecting seat (2). The two ends of the load-bearing component (8) are respectively hinged to a connecting wheel assembly (6), and the two ends of the load-bearing component (8) are respectively fixedly connected to a universal wheel assembly (81). The upper end of the drive assembly (9) is fixedly connected to the connecting seat (2).

7. An electric-assisted transport vehicle according to claim 6, characterized in that, The connecting seat (2) is provided with a cylinder (24) on the side away from the handle rod (12). The middle part of the bearing assembly (8) is sleeved on the cylinder (24) and rotates relative to the cylinder (24). The cylinder (24) is fixed to the upper end of the drive assembly (9). The hydraulic assembly (7) includes a hydraulic motor (71), a hydraulic station (72) and a push rod (73). The push rod (73) is set in the cylinder (24) and can move back and forth along the axis in the cylinder (24). The hydraulic motor (71) is connected to the controller (100) and the hydraulic station (72). The hydraulic motor (71) is used to control the hydraulic station (72) to supply oil to the cylinder (24) to lift the push rod (73). The hydraulic station (72) is provided with a pressure plate (721) connected to the pressure relief valve. The handle (17) is connected to the pressure plate (721) through the pull line (18).

8. An electric-assisted transport vehicle according to claim 6, characterized in that, The frame (4) is provided with two forward-extending forks (41), and two linkage wheel assemblies (6) are respectively located below the two forks (41). The linkage wheel assembly (6) includes a connecting arm (61), a wheel frame (62), and several wheels (63). The far end of the connecting arm (61) is hinged to the near end of the wheel frame (62), and the middle part of the wheel frame (62) is hinged to the forks (41) of the frame (4). The several wheels (63) are rotatably set. At the far end of the wheel frame (62); the load-bearing assembly (8) includes a load-bearing bridge (82) and two axle ears (83) respectively hinged to both ends of the load-bearing bridge (82). The middle part of the load-bearing bridge (82) is sleeved on the connecting seat (2). The upper part of the axle ear (83) away from the load-bearing bridge (82) is hinged to the frame (4), and the lower part of the axle ear (83) away from the load-bearing bridge (82) is hinged to the proximal end of the connecting arm (61) in the connecting rod wheel assembly (6).

9. An electric-assisted transport vehicle according to claim 6, characterized in that, The drive assembly (9) includes a wheel frame (91), a drive motor (92), a reduction gearbox (93), and a drive wheel (94). The reduction gearbox (93) is detachably mounted on one side of the wheel frame (91). The reduction gearbox (93) includes a gear set (931), and the output end of the gear set (931) is provided with an output shaft (932). The drive motor (92) is mounted on the reduction gearbox (93), and the drive motor (92) is connected to the input end of the gear set (931) and inputs power to the gear set (931). The drive wheel (94) is rotatably mounted on the wheel frame (91). The drive wheel (94) has a first mounting hole (941) at its center. When the gearbox (93) is mounted on the wheel frame (91), the output shaft (932) of the gearbox (93) passes through the first mounting hole (941) of the drive wheel (94) and is connected to the drive wheel (94) in a non-rotatable manner. The drive motor (92) is connected to the controller (100) and is controlled by the controller (100).

10. An electric-assisted transport vehicle according to claim 6, characterized in that, The frame (4) has a battery slot (42) for installing the battery structure (5) on one side. The battery slot (42) has at least one elastic limiting member (43) on its wall. The elastic limiting member (43) includes a first end and a second end. The first end and the second end of the elastic limiting member (43) are connected by an acute-angle arc transition. The first end of the elastic limiting member (43) is fixedly connected to the wall of the battery slot (42). The second end of the elastic limiting member (43) is located inside the battery slot (42). When the battery structure (5) is installed inside the battery slot (42), the second end of the elastic limiting member (43) is deformed by pressure and abuts against the battery structure (5).

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