Telescopic fork leg and carrier

Abstract

The embodiment of the utility model provides a telescopic fork leg and a carrier, and relates to the technical field of cargo carrying. According to the telescopic fork leg provided by the embodiment of the utility model, when goods are carried, the power mechanism transmits driving force to the two driving wheels, and the two-way output shaft drives the two driving wheels to rotate. The two driving wheels and the driven trundles jointly drive the bottom plate and the telescopic fork legs to stretch out of the truck body of the truck and enter a gap between goods and the ground. And after the lifting assembly lifts the goods, the vehicle body of the carrying vehicle moves to the bottom of the goods to carry the goods. According to the telescopic fork leg, the two-way output shaft is adopted to drive the two driving wheels to stretch out and draw back at the same time, so that the telescopic stability of the telescopic fork leg is improved, it is ensured that the telescopic fork leg can take goods smoothly, and the goods carrying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of goods handling, in particular to a telescopic fork leg and a handling vehicle. Background Art

[0002] At present, handling vehicles have been widely popularized and applied in the process of goods handling in factories, e-commerce warehouses, and workshops. When a handling vehicle is used for goods handling, the handling vehicle moves to the gap between the goods and the ground, then the handling vehicle lifts the goods and transports the goods to a designated position.

[0003] The handling vehicle includes a vehicle body and telescopic fork legs arranged on the vehicle body. The telescopic fork legs can extend or retract from the vehicle body. After the telescopic fork legs extend, the goods are lifted by a lifting assembly, and the vehicle body transports the goods to the destination. In the prior art, the smoothness of the telescopic fork legs extending or retracting from the vehicle body needs to be improved. Summary of the Utility Model

[0004] The purpose of the embodiments of the utility model is to provide a telescopic fork leg and a handling vehicle to achieve smooth telescoping of the telescopic fork legs. The specific technical solutions are as follows:

[0005] A first aspect of the present application provides a telescopic fork leg applied to a handling vehicle, including:

[0006] A bottom plate for slidably connecting with the vehicle body of the handling vehicle;

[0007] A telescopic drive assembly, a lifting assembly, and driven casters; the telescopic drive assembly, the lifting assembly, and the driven casters are sequentially arranged on the bottom plate along the length direction of the bottom plate;

[0008] The telescopic drive assembly includes a power mechanism and two drive wheels. The power mechanism is provided with a bidirectional output shaft, and both ends of the bidirectional output shaft are respectively connected to the corresponding drive wheels. The bidirectional output shaft is used to drive the two drive wheels to rotate;

[0009] The lifting assembly is used to lift the goods, and the driven casters are used to rotate synchronously with the two drive wheels.

[0010] In some embodiments, the power mechanism further includes a first motor and a first reducer;

[0011] The output shaft of the first motor is connected to the input shaft of the first reducer; the output shaft of the first reducer is provided with a first bevel gear;

[0012] The bidirectional output shaft is sleeved with a first connecting gear; the first connecting gear meshes with the first bevel gear to drive the bidirectional output shaft to rotate.

[0013] In some embodiments, the telescopic drive assembly further includes:

[0014] The first housing has mounting holes provided on two sides symmetric about the first motor, and bearings are provided in the mounting holes; the first connecting gear is disposed within the first housing, and two ends of the bidirectional output shaft are inserted through the corresponding bearings; the first housing has a mounting surface, and the mounting surface is connected to the bottom plate to fix the telescopic driving assembly.

[0015] In some embodiments, connection keys are provided on the side surfaces of two ends of the bidirectional output shaft, the driving wheel has a first connecting through hole, a key groove is provided on the side wall of the first connecting through hole, two ends of the bidirectional output shaft are inserted through the corresponding first connecting through holes, and the connection keys are embedded in the key grooves.

[0016] In some embodiments, threaded holes are provided at the end faces of two ends of the bidirectional output shaft, the threaded holes are in threaded connection with bolts, and circular gaskets are provided between the end faces and the bolts to fix the driving wheel.

[0017] In some embodiments, a first positioning pin is provided on the mounting surface, and a first positioning hole matching with the first positioning pin is provided on the bottom plate.

[0018] In some embodiments, the power mechanism further includes a second motor and two second speed reducers; a second bevel gear is provided on the output shaft of the second motor, and a second connecting gear is sleeved on the bidirectional output shaft; the second connecting gear meshes with the second bevel gear to drive the bidirectional output shaft to rotate; two ends of the bidirectional output shaft are respectively connected to the driving wheel through the corresponding second speed reducers.

[0019] In some embodiments, the second motor is provided with a mounting bracket, and the mounting bracket is connected to the bottom plate to fix the telescopic driving assembly.

[0020] In some embodiments, a second positioning pin is provided at the bottom of the mounting bracket, and a second positioning hole matching with the second positioning pin is provided on the bottom plate.

[0021] In some embodiments, the lifting assembly includes:

[0022] A top plate for lifting goods;

[0023] A first lifting arm, a first end of the first lifting arm is slidably connected to the top plate, and a second end of the first lifting arm is slidably connected to the bottom plate;

[0024] A second lifting arm, a first end of the second lifting arm is slidably connected to the top plate, and a second end of the second lifting arm is slidably connected to the bottom plate; the first lifting arm is hinged to the second lifting arm;

[0025] A lifting power mechanism is disposed on the bottom plate; the lifting power mechanism is connected to the second end of the first lifting arm to drive the second end of the first lifting arm to move towards or away from the second end of the second lifting arm.

[0026] Alternatively, the lifting power mechanism is connected to the second end of the second lifting arm to drive the second end of the second lifting arm to move towards or away from the second end of the first lifting arm.

[0027] In some embodiments, the lifting power mechanism includes:

[0028] A lifting motor is disposed on the bottom plate;

[0029] A lead screw, the output shaft of the lifting motor is connected to the lead screw to drive the lead screw to rotate;

[0030] A lead screw nut is in threaded engagement with the lead screw, the lead screw nut is connected to the second end of the first lifting arm, and the lead screw nut is used to drive the second end of the first lifting arm to move towards or away from the second end of the second lifting arm when the lead screw rotates;

[0031] Alternatively, the lead screw nut is connected to the second end of the second lifting arm, and the lead screw nut is used to drive the second end of the second lifting arm to move towards or away from the second end of the first lifting arm when the lead screw rotates.

[0032] In some embodiments, a rubber-coated wheel is sleeved on the outer periphery of the driving wheel.

[0033] In some embodiments, the rubber-coated wheel is detachably connected to the driving wheel.

[0034] In some embodiments, the driven caster is elastically connected to the other side of the bottom plate.

[0035] The second aspect of the present application provides a handling cart, including the telescopic fork legs and the vehicle body described in any one of the above, and the bottom plate of the telescopic fork legs is slidably connected to the vehicle body.

[0036] For the telescopic fork legs provided by the embodiments of the present utility model, when carrying goods, the power mechanism transmits the driving force to the two driving wheels, and the bidirectional output shaft drives the two driving wheels to rotate. The two driving wheels and the driven caster jointly drive the bottom plate and the telescopic fork legs to extend out of the vehicle body of the handling cart and enter the gap between the goods and the ground. After the lifting assembly lifts the goods, the vehicle body of the handling cart moves to the bottom of the goods for carrying the goods. Since the telescopic fork legs of the present application adopt a bidirectional output shaft to simultaneously drive the two driving wheels for telescoping, the smoothness of the telescoping of the telescopic fork legs is improved, ensuring that the telescopic fork legs can successfully pick up goods and improving the efficiency of goods handling.

[0037] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0039] Figure 1 Schematic perspective view of the carrier truck provided by the embodiment of the present application;

[0040] Figure 2 One of the schematic perspective views of the telescopic fork legs provided by the embodiment of the present application;

[0041] Figure 3 Another schematic perspective view of the telescopic fork legs provided by the embodiment of the present application;

[0042] Figure 4 Yet another schematic perspective view of the telescopic fork legs provided by the embodiment of the present application;

[0043] Figure 5 Still another schematic perspective view of the telescopic fork legs provided by the embodiment of the present application;

[0044] Figure 6 Schematic perspective view of the first telescopic drive assembly in the telescopic fork legs provided by the embodiment of the present application;

[0045] Figure 7a For Figure 6 Schematic A-A sectional view of the shown telescopic drive assembly;

[0046] Figure 7b For Figure 6 Schematic B-B sectional view of the shown telescopic drive assembly;

[0047] Figure 8 For Figure 6 Schematic connection diagram of the shown telescopic drive assembly and the bottom plate;

[0048] Figure 9 For Figure 8 Schematic enlarged partial view at A in

[0049] Figure 10 Exploded view of the second telescopic drive assembly in the telescopic fork legs provided by the embodiment of the present application;

[0050] Figure 11Schematic three-dimensional structure diagram of the third telescopic drive assembly in the telescopic fork legs provided by the embodiment of the present application;

[0051] Figure 12 is Figure 11 Schematic three-dimensional structure diagram of the telescopic drive assembly shown from another angle;

[0052] Figure 13 is Figure 11 Schematic C-C sectional structure diagram of the telescopic drive assembly shown;

[0053] Figure 14 is Figure 11 Schematic connection diagram of the telescopic drive assembly and the bottom plate shown;

[0054] Figure 15 is Figure 14 Partial enlarged structure diagram at position B in

[0055] Telescopic fork legs 10; vehicle body 20; bottom plate 100; side plate 110; telescopic drive assembly 200; power mechanism 210; first motor 211; first junction box 2111; second junction box 2112; first reducer 212; first bevel gear 213; second motor 214; terminal 2141; second reducer 215; second bevel gear 216; mounting bracket 217; first connecting gear 218; bidirectional output shaft 220; connecting key 221; threaded hole 222; second connecting gear 223; drive wheel 230; first connecting through hole 231; keyway 232; second connecting through hole 233; rubber-coated wheel 234; first housing 240; mounting hole 241; bearing 242; mounting surface 243; bolt 244; circular gasket 245; first positioning pin 246; second positioning pin 247; second housing 250; driven caster 300; lifting assembly 400; top plate 410; first lifting arm 420; second lifting arm 430; lifting power mechanism 440; lifting motor 441; lead screw 442; lead screw nut 443. Detailed implementation manners

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art based on the present application belong to the protection scope of the present invention.

[0057] In order to achieve stable telescoping of the telescopic fork legs, the embodiment of the present application provides a telescopic fork leg and a handling vehicle.

[0058] See Figure 1 , Figure 1The three-dimensional structural schematic diagram of the carrier truck provided by the embodiment of the present application is as follows Figure 1 As shown, the carrier truck provided by the embodiment of the present application includes: telescopic fork legs 10 and a vehicle body 20. Among them, the bottom plate 100 of the telescopic fork legs 10 is slidably connected to the vehicle body 20.

[0059] Refer to Figures 2 - 5 , Figure 2 One of the three-dimensional structural schematic diagrams of the telescopic fork legs 10 provided by the embodiment of the present application is as follows Figure 3 Another three-dimensional structural schematic diagram of the telescopic fork legs 10 provided by the embodiment of the present application is as follows Figure 4 A further three-dimensional structural schematic diagram of the telescopic fork legs 10 provided by the embodiment of the present application is as follows Figure 5 One of the three-dimensional structural schematic diagrams of the telescopic fork legs 10 provided by the embodiment of the present application is as follows Figures 2 to 5 As shown, in a first aspect of the present application, a telescopic fork leg 10 is proposed. The telescopic fork leg 10 is applied to a carrier truck. The telescopic fork leg 10 includes a bottom plate 100, a telescopic drive assembly 200, a lifting assembly 400, and driven casters 300. The bottom plate 100 is used for slidably connecting with the vehicle body 20 of the carrier truck. The telescopic drive assembly 200, the lifting assembly 400, and the driven casters 300 are sequentially arranged on the bottom plate 100 along the length direction of the bottom plate 100. The telescopic drive assembly 200 includes a power mechanism 210 and two drive wheels 230. The power mechanism 210 is provided with a two-way output shaft 220. The two ends of the two-way output shaft 220 are respectively connected to the corresponding drive wheels 230. The two-way output shaft 220 is used for driving the two drive wheels 230 to rotate. The lifting assembly 400 is used for lifting goods, and the driven casters 300 are used for rotating synchronously with the two drive wheels 230.

[0060] For the telescopic fork leg 10 provided by the embodiment of the present utility model, when carrying goods, the power mechanism 210 transmits the driving force to the two drive wheels 230, and the two-way output shaft 220 drives the two drive wheels 230 to rotate. The two drive wheels 230 and the driven casters 300 jointly drive the bottom plate 100 and the lifting assembly 400 to extend out of the vehicle body 20 of the carrier truck and enter the gap between the goods and the ground. After the lifting assembly 400 lifts the goods, the vehicle body of the carrier truck moves to the bottom of the goods for carrying the goods. Since the telescopic fork leg 10 of the present application uses the two-way output shaft 220 to simultaneously drive the two drive wheels 230 for telescoping, the smoothness of the telescopic fork leg 10 during telescoping is improved, ensuring that the telescopic fork leg 10 can successfully pick up goods and improving the efficiency of goods handling.

[0061] It should be noted that after the lifting assembly 400 lifts the goods, the telescopic fork leg 10 remains stationary, and the vehicle body 20 moves below the telescopic fork leg 10. Of course, it can also be that the vehicle body 20 remains stationary, and the telescopic fork leg 10 pulls the goods back to the vehicle body.

[0062] As Figure 3and Figure 4 As shown in Figure 4 , in some embodiments, the power mechanism 210 further includes a first motor 211 and a first speed reducer 212. The output shaft of the first motor 211 is connected to the input shaft of the first speed reducer 212, and a first bevel gear 213 is provided on the output shaft of the first speed reducer 212. A first connecting gear 218 is sleeved on the bidirectional output shaft 220; the first connecting gear 218 meshes with the first bevel gear 213 to drive the bidirectional output shaft 220 to rotate.

[0063] When carrying goods, the first motor 211 transmits the driving force to the first speed reducer 212. Since the first bevel gear 213 is provided on the output shaft of the first speed reducer 212, and the first bevel gear 213 meshes with the first connecting gear, the first speed reducer 212 drives the bidirectional output shaft 220 to rotate, and the bidirectional output shaft 220 drives the two drive wheels 230 to rotate. The two drive wheels 230 and the driven caster wheels 300 jointly drive the bottom plate 100 and the lifting assembly 400 to extend and retract inside the vehicle body 20 of the forklift truck. By setting the first speed reducer 212 to drive the two drive wheels 230 to rotate smoothly, the smoothness of the telescopic movement of the telescopic fork legs 10 is further improved.

[0064] It should be noted that the first speed reducer 212 can be a planetary speed reducer, which specifically can include a sun gear, planetary gears and an internal gear ring. The output shaft of the first motor 211 can be used as the sun gear of the first speed reducer 212 and meshes with one side of the planetary gears. The other side of the planetary gears meshes with the internal gear ring. The planetary gears are connected to the planet carrier, and the planet carrier meshes with the first connecting gear through the first bevel gear 213.

[0065] When the telescopic drive assembly 200 drives the bottom plate 100 to slide out of the forklift truck, the output shaft of the first motor 211 drives the planetary gears to rotate. Since the planetary gears are connected to the planet carrier, the planetary gears drive the planet carrier to rotate. Since the planet carrier meshes with the first connecting gear through the first bevel gear 213, the planet carrier drives the first bevel gear 213 to rotate, and the first bevel gear 213 drives the bidirectional output shaft 220 to rotate through the first connecting gear. The bidirectional output shaft 220 drives the two drive wheels 230 to rotate, and the two drive wheels 230 and the driven caster wheels 300 jointly drive the bottom plate 100 and the lifting assembly 400 to extend and retract inside the vehicle body 20 of the forklift truck.

[0066] There are at least two implementation manners for the telescopic drive assembly of the telescopic fork legs 10 provided in the embodiments of the present application, which are described in detail below respectively.

[0067] See Figures 6 - 9 , Figure 6 which is a schematic three-dimensional structure diagram of the first telescopic drive assembly in the telescopic fork legs provided in the embodiments of the present application, Figure 7a is Figure 6 a schematic cross-sectional structure diagram taken along line A-A of the telescopic drive assembly shown in Figure 6 , Figure 7b isFigure 6 Schematic cross-sectional structure diagram of the telescopic drive assembly shown in the B-B section Figure 8 is Figure 6 Schematic connection diagram of the telescopic drive assembly shown and the bottom plate Figure 9 is Figure 8 Partial enlarged structure diagram at position A in Figures 6 to 9 As shown, in some embodiments, the telescopic drive assembly 200 further includes a first housing 240. Mounting holes 241 are provided on both sides of the first housing 240 symmetric about the first motor 211. Bearings 242 are provided in the mounting holes 241. The first connecting gear is disposed inside the housing, and both ends of the bidirectional output shaft 220 pass through the corresponding bearings 242. The first housing 240 has a mounting surface 243, and the mounting surface 243 is connected to the bottom plate 100 to fix the telescopic drive assembly 200. The bidirectional output shaft 220 is rotatably connected to the first housing 240 through the corresponding bearings 242 and is fixed to the housing. The mounting surface 243 and the bottom plate 100 can be connected by bolts 244.

[0068] As Figure 6 shown, a first junction box 2111 may be provided on the first motor 211. The first junction box 2111 is connected to a power cord for supplying power to the first motor. The shape of the first junction box 2111 may be square, and one of its sides is recessed toward the direction of the first motor.

[0069] In some embodiments, as Figure 6 shown, connection keys 221 are provided on the side surfaces of both ends of the bidirectional output shaft 220. The drive wheel 230 has a first connection through hole 231, and a key groove 232 is provided on the side wall of the first connection through hole 231. Both ends of the bidirectional output shaft 220 pass through the corresponding first connection through holes 231, and the connection keys 221 are embedded in the key grooves 232. The cooperation between the connection keys 221 and the key grooves 232 realizes the radial fixation of the drive wheel 230 and the bidirectional output shaft 220.

[0070] It should be noted that the bidirectional output shaft 220 may be a cylindrical output shaft, and two flat keys symmetric about the central axis of the cylindrical output shaft are provided on the side surface of the cylindrical output shaft. The bidirectional output shaft 220 may also be a conical output shaft, and one flat key is provided on the side surface of the conical output shaft.

[0071] In some embodiments, as Figure 6 shown, threaded holes 222 are provided at both end faces of the bidirectional output shaft 220. The threaded holes 222 are threadedly connected to the bolts 244, and a circular gasket 245 is provided between the end face and the bolts 244 to fix the drive wheel 230. The cooperation between the bolts 244 and the circular gaskets 245 realizes the axial fixation of the drive wheel 230 and the bidirectional output shaft 220, and prevents the drive wheel 230 from separating from the bidirectional output shaft 220 along the axial direction.

[0072] Figure 9 is Figure 8 a partial enlarged structural schematic diagram of part A in Figure 9 As shown, in some embodiments, a first positioning pin 246 is provided on the mounting surface 243, and a first positioning hole cooperating with the first positioning pin 246 is provided on the bottom plate 100. When installing the power mechanism 210, the first positioning pin 246 extends into the corresponding first positioning hole to achieve accurate positioning between the power mechanism 210 and the bottom plate 100. In addition, by the cooperation of the first positioning pin 246 and the first positioning hole, the installation efficiency of the power mechanism 210 installed on the bottom plate 100 is improved.

[0073] In some embodiments, the junction box structure can adopt other forms. For example: refer to Figure 10 , Figure 10 is an exploded schematic diagram of the second telescopic drive assembly in the telescopic fork legs provided by the embodiments of the present application. Among them, a second junction box 2112 can also be provided on the first motor 211. The shape of the first junction box 2111 can be square, and one side protrudes in the direction away from the first motor. The functions of the first junction box 2111 and the second junction box 2112 are the same.

[0074] Figure 6 The first telescopic drive assembly shown in Figure 3 and Figure 4 can be applied to the telescopic fork legs shown in Figure 10 The second telescopic drive assembly shown in Figure 3 and Figure 4 can also be applied to the telescopic fork legs shown in

[0075] In other embodiments, refer to Figures 11 - 15 .

[0076] Figure 11 is a three-dimensional structural schematic diagram of the third telescopic drive assembly in the telescopic fork legs provided by the embodiments of the present application, Figure 12 is Figure 11 a three-dimensional structural schematic diagram of the telescopic drive assembly shown in another angle, Figure 13 is Figure 11 a C-C sectional structural schematic diagram of the telescopic drive assembly shown, Figure 14 is Figure 11 a connection schematic diagram of the telescopic drive assembly and the bottom plate, as shown in Figures 11 to 14 As shown, in some embodiments, the power mechanism 210 further includes a second motor 214 and two second speed reducers 215; a second bevel gear 216 is provided on the output shaft of the second motor 214, and a second connecting gear 223 is sleeved on the bidirectional output shaft 220; the second connecting gear 223 meshes with the second bevel gear 216 to drive the bidirectional output shaft 220 to rotate; both ends of the bidirectional output shaft 220 are respectively connected to the drive wheels 230 through the corresponding second speed reducers 215.

[0077] When carrying goods, the second motor 214 transmits the driving force to the second bevel gear 216, and the second bevel gear 216 drives the bidirectional output shaft 220 to rotate. The bidirectional output shaft 220 transmits the driving force to the second speed reducer 215, and the two second speed reducers 215 drive the corresponding drive wheels 230 to rotate. The two drive wheels 230 and the driven caster wheels 300 jointly drive the bottom plate 100 and the lifting assembly 400 to extend and retract inside the vehicle body 20 of the transporter. By setting the second speed reducer 215 to drive the two drive wheels 230 to rotate smoothly, the smoothness of the telescopic fork legs 10 extending and retracting is further improved.

[0078] It should be noted that, as Figure 13 shown, the second speed reducer 215 includes reduction gears. First sawteeth are provided at both ends of the bidirectional output shaft 220, and the first sawteeth are in one-to-one correspondence and meshed with the reduction gears. The drive wheel 230 has a second connection through hole 233, and second sawteeth are provided on the side wall of the second connection through hole 233. The reduction gears are also meshed with the corresponding second sawteeth.

[0079] It should be noted that the telescopic drive assembly 200 of the present application has two forms. The first form is that the side connected to the motor is a planetary speed reducer, and the side connected to the wheel is a shaft connection. Specifically, the first motor is connected to the first speed reducer, and the drive wheel is connected to the bidirectional output shaft. The second form is that the side connected to the motor is a bevel gear connection, and a planetary speed reducer is installed inside the drive wheel. Specifically, the second motor is connected to the second bevel gear, and the drive wheel is connected to the second speed reducer.

[0080] As Figure 11 and Figure 12 shown, a wiring terminal 2141 is provided at the top of the second motor 214, and the wiring terminal 2141 is connected to the power supply line to supply power to the second motor 214.

[0081] In some embodiments, as Figure 11 shown, the telescopic drive assembly 200 further includes a second housing 250. The second bevel gear 216 and the second connecting gear 223 are disposed inside the second housing 250, and the second housing 250 is used to fix the bidirectional output shaft 220.

[0082] In some embodiments, as Figures 10 to 12 shown, the second motor 214 is provided with a mounting bracket 217, and the mounting bracket 217 is connected to the bottom plate 100 to fix the telescopic drive assembly 200. Therefore, the telescopic drive assembly 200 can be fixed to the bottom plate 100 through the mounting bracket 217 and can also be fixed to the bottom plate 100 through the first housing 240.

[0083] Figure 15 For Figure 14 the partial enlarged structural schematic diagram at position B in Figure 15As shown, in some embodiments, a second positioning pin 247 is provided at the bottom of the mounting bracket 217, and the base plate 100 is provided with a second positioning hole that cooperates with the second positioning pin 247.

[0084] When installing the power mechanism 210, the second positioning pin 247 extends into the corresponding second positioning hole to achieve accurate positioning between the power mechanism 210 and the base plate 100. In addition, by the cooperation of the second positioning pin 247 and the second positioning hole, the installation efficiency of the power mechanism 210 installed on the base plate 100 is improved.

[0085] It should be noted that in the telescopic drive assembly 200, either the first motor or the second motor can be adjacent to the side plate 110, or the drive wheel can be adjacent to the side plate 110. There is a gap between the entire telescopic drive assembly 200 and the lifting assembly 400.

[0086] In some embodiments, as Figures 2 - 5 shown, the lifting assembly 400 includes a top plate 410, a first lifting arm 420, a second lifting arm 430, and a lifting power mechanism 440. The top plate 410 is used to lift goods. The first end of the first lifting arm 420 is slidably connected to the top plate 410, and the second end of the first lifting arm 420 is slidably connected to the base plate 100. The first end of the second lifting arm 430 is slidably connected to the top plate 410, and the second end of the second lifting arm 430 is slidably connected to the base plate 100; the first lifting arm 420 and the second lifting arm 430 are hinged. The lifting power mechanism 440 is disposed on the base plate 100. The lifting power mechanism 440 is connected to the second end of the first lifting arm 420 to drive the second end of the first lifting arm 420 to move towards or away from the second end of the second lifting arm 430. Alternatively, the lifting power mechanism 440 is connected to the second end of the second lifting arm 430 to drive the second end of the second lifting arm 430 to move towards or away from the second end of the first lifting arm 420.

[0087] When carrying goods, as the telescopic drive assembly 200 extends the lifting assembly 400 on the base plate 100 out of the vehicle body 20 of the carrier, the lifting power mechanism 440 drives the second end of the first lifting arm 420 to move towards the second end of the second lifting arm 430, and the included angle between the first lifting arm 420 and the second lifting arm 430 decreases, and the top plate 410 rises to lift the goods. Then, the vehicle body of the carrier moves to the bottom of the goods to carry the goods. Finally, the lifting power mechanism 440 drives the second end of the first lifting arm 420 to move away from the second end of the second lifting arm 430, and the included angle between the first lifting arm 420 and the second lifting arm 430 increases, and the top plate 410 descends to place the goods at the target position.

[0088] Alternatively, when carrying goods, as the telescopic drive assembly 200 extends the lifting assembly 400 on the bottom plate 100 out of the vehicle body 20 of the transporter, the lifting power mechanism 440 drives the second end of the second lifting arm 430 to move towards the second end of the first lifting arm 420, the angle between the first lifting arm 420 and the second lifting arm 430 decreases, and the top plate 410 rises to lift the goods. Then, the vehicle body of the transporter moves to the bottom of the goods to carry the goods. Finally, the lifting power mechanism 440 drives the second end of the second lifting arm 430 away from the second end of the first lifting arm 420, the angle between the first lifting arm 420 and the second lifting arm 430 increases, and the top plate 410 descends to place the goods at the target position.

[0089] In some embodiments, as Figures 2 - 5 shown, the lifting power mechanism 440 includes a lifting motor 441, a lead screw 442, and a lead screw nut 443. The lifting motor 441 is disposed on the bottom plate 100. The output shaft of the lifting motor 441 is connected to the lead screw 442 to drive the lead screw 442 to rotate. The lead screw nut 443 is in threaded engagement with the lead screw 442, and the lead screw nut 443 is connected to the second end of the first lifting arm 420. The lead screw nut 443 is configured to drive the second end of the first lifting arm 420 to move towards or away from the second end of the second lifting arm 430 when the lead screw 442 rotates. Alternatively, the lead screw nut 443 is connected to the second end of the second lifting arm 430, and the lead screw nut 443 is configured to drive the second end of the second lifting arm 430 to move towards or away from the second end of the first lifting arm 420 when the lead screw 442 rotates.

[0090] When the lifting power mechanism 440 drives the second end of the second lifting arm 430 to move towards the second end of the first lifting arm 420, the lead screw nut 443 drives the second end of the second lifting arm 430 to move towards the second end of the first lifting arm 420 under the rotation of the lead screw 442. When the lifting power mechanism 440 drives the second end of the second lifting arm 430 to move away from the second end of the first lifting arm 420, the lead screw nut 443 drives the second end of the second lifting arm 430 to move away from the second end of the first lifting arm 420 under the rotation of the lead screw 442.

[0091] Alternatively, when the lifting power mechanism 440 drives the second end of the first lifting arm 420 to move towards the second end of the second lifting arm 430, the lead screw nut 443 drives the second end of the first lifting arm 420 to move towards the second end of the second lifting arm 430 under the rotation of the lead screw 442. When the lifting power mechanism 440 drives the second end of the first lifting arm 420 to move away from the second end of the second lifting arm 430, the lead screw nut 443 drives the second end of the first lifting arm 420 to move away from the second end of the second lifting arm 430 under the rotation of the lead screw 442.

[0092] In some embodiments, as Figure 13As shown, a rubber-coated wheel 234 is sleeved on the outer periphery of the driving wheel 230. By providing the rubber-coated wheel 234, it can not only prevent the outer peripheral surface of the driving wheel 230 from being damaged, but also play a role in shock absorption during the driving process of the driving wheel.

[0093] In some embodiments, the rubber-coated wheel 234 is detachably connected to the driving wheel 230.

[0094] In some embodiments, the driven caster 300 is elastically connected to the other side of the bottom plate 100. The driven caster 300 can be elastically connected to the other side of the bottom plate 100 through a spring. The driven caster 300 can be a single wheel, a double wheel, or two single wheels. Since the driven caster is elastically connected to the other side of the bottom plate 100, the driven caster can swing up and down around the extending direction of the telescopic fork leg 10, ensuring that the driven caster 300 is always in contact with the ground and supporting the bottom plate 100.

[0095] Figure 11 The third telescopic drive assembly shown can be applied to Figure 2 and Figure 5 the telescopic fork leg shown.

[0096] In a second aspect of the present application, a handling vehicle is proposed, as Figure 1 shown, including the telescopic fork leg 10 and the vehicle body 20 of any one of the above, and the bottom plate 100 of the telescopic fork leg 10 is slidably connected to the vehicle body 20.

[0097] The above are only the preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are all included in the protection scope of the present utility model.

Claims

1. A telescopic fork leg, characterized in that, Applied to a forklift truck, including: A bottom plate (100) for slidably connecting with the vehicle body (20) of the forklift truck; A telescopic drive assembly (200), a lifting assembly (400) and a driven caster (300); the telescopic drive assembly (200), the lifting assembly (400) and the driven caster (300) are sequentially arranged on the bottom plate (100) along the length direction of the bottom plate (100); The telescopic drive assembly (200) includes a power mechanism (210) and two drive wheels (230), the power mechanism (210) is provided with a bidirectional output shaft (220), and both ends of the bidirectional output shaft (220) are respectively connected with the corresponding drive wheels (230), and the bidirectional output shaft (220) is used for driving the two drive wheels (230) to rotate; The lifting assembly (400) is used for lifting goods, and the driven caster (300) is used for rotating synchronously with the two drive wheels (230).

2. The telescopic fork legs according to claim 1, wherein The power mechanism (210) further includes a first motor (211) and a first reducer (212); The output shaft of the first motor (211) is connected with the input shaft of the first reducer (212); the output shaft of the first reducer (212) is provided with a first bevel gear (213); The bidirectional output shaft (220) is sleeved with a first connecting gear (218); the first connecting gear (218) meshes with the first bevel gear (213) to drive the bidirectional output shaft (220) to rotate.

3. The telescopic fork legs according to claim 2, characterized in that, The telescopic drive assembly (200) further includes: A first housing (240), mounting holes (241) are arranged on both sides of the first housing (240) symmetric about the first motor (211), and bearings (242) are arranged in the mounting holes (241); the first connecting gear (218) is arranged in the first housing (240), and both ends of the bidirectional output shaft (220) pass through the corresponding bearings (242); the first housing (240) has a mounting surface (243), and the mounting surface (243) is connected with the bottom plate (100) to fix the telescopic drive assembly (200).

4. The telescopic fork legs according to claim 3, characterized in that, Connecting keys (221) are arranged on the side surfaces of both ends of the bidirectional output shaft (220), the drive wheel (230) has a first connecting through hole (231), a key groove (232) is arranged on the side wall of the first connecting through hole (231), both ends of the bidirectional output shaft (220) pass through the corresponding first connecting through holes (231), and the connecting keys (221) are embedded in the key grooves (232).

5. The telescopic fork legs according to claim 4, characterized in that, Threaded holes (222) are arranged on the end surfaces of both ends of the bidirectional output shaft (220), the threaded holes (222) are threadedly connected with bolts (244), and circular gaskets (245) are arranged between the end surfaces and the bolts (244) to fix the drive wheels (230).

6. The telescopic fork legs according to claim 5, characterized in that, A first positioning pin (246) is arranged on the mounting surface (243), and the bottom plate (100) is provided with a first positioning hole matching with the first positioning pin (246).

7. The telescopic fork legs according to claim 1, characterized in that, The power mechanism (210) further includes a second motor (214) and two second speed reducers (215); a second bevel gear (216) is provided on the output shaft of the second motor (214), and a second connecting gear (223) is sleeved on the bidirectional output shaft (220); the second connecting gear (223) meshes with the second bevel gear (216) to drive the bidirectional output shaft (220) to rotate; both ends of the bidirectional output shaft (220) are respectively connected to the driving wheel (230) through the corresponding second speed reducers (215).

8. The telescopic fork legs according to claim 7, characterized in that, The second motor (214) is provided with a mounting bracket (217), and the mounting bracket (217) is connected to the bottom plate (100) to fix the telescopic driving assembly (200).

9. The telescopic fork legs according to claim 8, characterized in that, A second positioning pin (247) is provided at the bottom of the mounting bracket (217), and the bottom plate (100) is provided with a second positioning hole that cooperates with the second positioning pin (247).

10. The telescopic fork legs according to any one of claims 1 to 9, characterized in that, The lifting assembly (400) includes: A top plate (410) for lifting goods; A first lifting arm (420), the first end of the first lifting arm (420) is slidably connected to the top plate (410), and the second end of the first lifting arm (420) is slidably connected to the bottom plate (100); A second lifting arm (430), the first end of the second lifting arm (430) is slidably connected to the top plate (410), and the second end of the second lifting arm (430) is slidably connected to the bottom plate (100); the first lifting arm (420) is hinged to the second lifting arm (430); A lifting power mechanism (440) is provided on the bottom plate (100); the lifting power mechanism (440) is connected to the second end of the first lifting arm (420) to drive the second end of the first lifting arm (420) to move towards or away from the second end of the second lifting arm (430); Or, the lifting power mechanism (440) is connected to the second end of the second lifting arm (430) to drive the second end of the second lifting arm (430) to move towards or away from the second end of the first lifting arm (420).

11. The telescopic fork legs according to claim 10, characterized in that, The lifting power mechanism (440) includes: A lifting motor (441) provided on the bottom plate (100); A lead screw (442), the output shaft of the lifting motor (441) is connected to the lead screw (442) to drive the lead screw (442) to rotate; A lead screw (442) nut that is in threaded cooperation with the lead screw (442), the lead screw (442) nut is connected to the second end of the first lifting arm (420), and the lead screw (442) nut is used to drive the second end of the first lifting arm (420) to move towards or away from the second end of the second lifting arm (430) when the lead screw (442) rotates; Alternatively, the nut of the lead screw (442) is connected to the second end of the second lifting arm (430), and the nut of the lead screw (442) is configured to drive the second end of the second lifting arm (430) to move towards or away from the second end of the first lifting arm (420) when the lead screw (442) rotates.

12. The telescopic outrigger leg according to any one of claims 1 to 9, characterized in that, A rubber-coated wheel (234) is sleeved on the outer periphery of the driving wheel (230).

13. The telescopic fork legs according to claim 12, characterized in that, The rubber-coated wheel (234) is detachably connected to the driving wheel (230).

14. The telescopic outrigger leg according to any one of claims 1 to 9, characterized in that, The driven caster (300) is elastically connected to the other side of the bottom plate (100).

15. A carrier vehicle, characterized in that, Comprising the telescopic fork legs (10) and the vehicle body (20) according to any one of claims 1 to 14, wherein the bottom plate (100) of the telescopic fork legs (10) is slidably connected to the vehicle body (20).

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