Telescopic scissor leg assembly and pallet truck

Abstract

A telescopic scissor leg assembly and a pallet truck. The telescopic scissor leg assembly comprises a bottom plate (100), a telescopic driving assembly (200), a driven caster (300), a lifting assembly (400) and a connecting assembly (500), wherein the bottom plate (100) is configured to be slidably connected to a body (20) of a pallet truck; the telescopic driving assembly (200), the lifting assembly (400) and the driven caster (300) are arranged in sequence in the direction of the length of the bottom plate (100); the telescopic driving assembly (200) is connected to a first end of the bottom plate (100) in the direction of the length thereof by means of the connecting assembly (500); the lifting assembly (400) and the driven caster (300) are arranged on the bottom plate (100); and the telescopic driving assembly (200) comprises an outer rotor electric motor (210). The outer rotor electric motor (210) is mounted at a second end of the connecting assembly (500), and the outer rotor electric motor (210) comprises a stator shaft (211) and an outer rotor (212) rotating around the stator shaft (211), wherein the extension direction of the stator shaft (211) is parallel to the direction of the width of the bottom plate (100), and the outer rotor (212) is configured to drive the bottom plate (100) to slide out of the body (20) of the pallet truck. When goods are handled, the outer rotor electric motor and the driven caster of the telescopic scissor leg assembly jointly drive the bottom plate and the lifting assembly to extend out of the pallet truck and enter a gap between the goods and the ground. After the lifting assembly lifts the goods, the body of the pallet truck moves to the bottom of the goods for goods handling. The telescopic scissor leg assembly extends and retracts by using the outer rotor electric motor, thereby improving the stability during extension and retraction and also improving the goods handling efficiency.

Description

Telescopic fork leg and trolley

[0001] The present application claims priority to the Chinese patent application No. 2024219773176, filed on August 14, 2024, and entitled "Telescopic fork leg and trolley", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of goods handling, in particular to a telescopic fork leg and a trolley. BACKGROUND

[0003] At present, trolleys have been widely popularized and applied in the process of goods handling in factories, e-commerce warehouses and workshops. When the trolley is used for goods handling, the trolley moves to the gap between the goods and the ground, then the trolley lifts the goods and transports the goods to the designated position.

[0004] The trolley includes a trolley body and a telescopic fork leg arranged on the trolley body, the telescopic fork leg can be extended or retracted from the trolley body. The telescopic fork leg extends to lift the goods by a lifting assembly, and the trolley body transports the goods to the destination. In the prior art, the stability of the telescopic fork leg extending or retracting from the trolley body needs to be improved. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a telescopic fork leg and a trolley to realize the stable extension and retraction of the telescopic fork leg. The specific technical solutions are as follows:

[0006] The present application proposes a telescopic fork leg applied to a trolley, comprising a bottom plate, a telescopic driving assembly, a driven caster, a lifting assembly and a connecting assembly;

[0007] The bottom plate is used for sliding connection with the trolley body;

[0008] The telescopic driving assembly, the lifting assembly and the driven caster are sequentially arranged along the length direction of the bottom plate; the telescopic driving assembly is connected with the first end of the length direction of the bottom plate through the connecting assembly, and the lifting assembly and the driven caster are arranged on the bottom plate;

[0009] The first end of the connecting assembly is fixedly connected with the first end of the bottom plate, and the second end of the connecting assembly extends from the first end of the bottom plate along the length direction of the bottom plate;

[0010] The telescopic driving assembly comprises an outer rotor motor; the outer rotor motor is installed on the second end of the connecting assembly;

[0011] The outer rotor motor comprises a stator shaft and an outer rotor rotating around the stator shaft; wherein the extension direction of the stator shaft is parallel to the width direction of the bottom plate, and the outer rotor is used to drive the bottom plate to slide out of the vehicle body of the transport vehicle.

[0012] The lifting assembly is used to lift goods; the driven caster is located at the second end in the length direction of the bottom plate and is used to rotate synchronously with the outer rotor.

[0013] In some embodiments, the outer rotor motor further comprises a first end cover assembly and a second end cover assembly.

[0014] The first end cover assembly is arranged at the first end in the axial direction of the outer rotor, and the second end cover assembly is arranged at the second end in the axial direction of the outer rotor.

[0015] The first end of the stator shaft is arranged through the first end cover assembly and protrudes out of the first end cover assembly, and is fixedly connected with the connecting assembly.

[0016] The first end of the second end cover assembly is provided with a support shaft protrusion, which protrudes away from the first end cover assembly, is coaxially and spacedly arranged with the stator shaft, and is rotationally connected with the connecting assembly.

[0017] In some embodiments, the first end cover assembly comprises a first end cover and a first bearing.

[0018] The first end cover is sleeved at the first end of the stator shaft and is fixedly connected with the outer rotor; the first end of the stator shaft protrudes out of the first end cover assembly and is fixedly connected with the connecting assembly.

[0019] The first end cover is provided with a first fixing groove on the side facing the second end cover assembly.

[0020] The first bearing is embedded in the first fixing groove; the second end of the stator shaft is arranged through the first end cover and the first bearing in sequence, so that the outer rotor rotates around the stator shaft.

[0021] The second end cover assembly comprises a second end cover and a second bearing.

[0022] The second end cover is arranged at the second end of the outer rotor; the second end cover is provided with a second fixing groove on the side facing the first end cover assembly.

[0023] The second bearing is embedded in the second fixing groove; the second end of the stator shaft is rotationally connected with the second bearing.

[0024] The second end cover is provided with the support shaft protrusion coaxial with the stator shaft on the side away from the first end cover assembly, and the support shaft protrusion is rotationally connected with the connecting assembly.

[0025] In some embodiments, the connecting assembly comprises a support structure, a first mounting plate and a second mounting plate.

[0026] The support structure is arranged at the first end of the bottom plate in the length direction, and partially extends from the first end of the bottom plate in the length direction.

[0027] The first mounting plate and the second mounting plate are arranged on the support structure and are parallel to the two sides of the bottom plate in the width direction.

[0028] The first end of the stator shaft is fixedly connected with the first mounting plate.

[0029] The support shaft protrusion of the second end cover assembly is rotationally connected with the second mounting plate.

[0030] In some embodiments, the support structure comprises a bent support plate and a connecting plate, the connecting plate is connected with the first end of the bottom plate in the length direction through the bent support plate, and the first mounting plate and the second mounting plate are both connected with the connecting plate.

[0031] In some embodiments, the first mounting plate is provided with a fixing hole away from the first end of the bottom plate, and the first end of the stator shaft is fixed in the fixing hole.

[0032] In some embodiments, the second mounting plate is provided with a bearing mounting hole away from the first end of the bottom plate, the bearing mounting hole is provided with a third bearing, and the support shaft protrusion of the second end cover assembly is rotationally connected with the second mounting plate through the third bearing.

[0033] In some embodiments, the top of the connecting plate is provided with a positioning pin, the bent support plate is provided with a positioning hole matched with the positioning pin, the second end of the first mounting plate is bolted with one side of the connecting plate, and the second end of the second mounting plate is bolted with the other side of the connecting plate.

[0034] In some embodiments, the outer rotor motor further comprises a rubber layer sleeved on the outer circumferential surface of the outer rotor.

[0035] In some embodiments, the first end of the stator shaft is provided with a shaft shoulder, and the shaft shoulder is used for abutting against the second end of the connecting assembly.

[0036] In some embodiments, the stator shaft is a flat shaft.

[0037] In some embodiments, the lifting assembly comprises:

[0038] a top plate for lifting goods;

[0039] a scissor mechanism, one end of the scissor mechanism being connected with the top plate, the scissor mechanism being used for lifting the top plate;

[0040] a lifting power mechanism, the lifting power mechanism being arranged on the bottom plate, the lifting power mechanism being connected with the other end of the scissor mechanism, the lifting power mechanism being used for providing lifting power to the scissor mechanism.

[0041] In some embodiments, the lifting power mechanism comprises:

[0042] a lifting motor, the lifting motor being arranged on the bottom plate;

[0043] a lead screw, an output shaft of the lifting motor being connected with the lead screw to drive the lead screw to rotate;

[0044] a lead screw nut, the lead screw nut being threadedly matched with the lead screw, the lead screw nut being connected with the other end of the scissor mechanism, the lead screw nut being used for providing lifting power to the scissor mechanism when the lead screw rotates.

[0045] In some embodiments, the second end of the bottom plate is provided with a driven caster mounting structure, the driven caster being elastically connected with the second end of the bottom plate through the driven caster mounting structure.

[0046] The second aspect of the present application provides a carrier, comprising the telescopic fork leg and a vehicle body, the bottom plate of the telescopic fork leg being slidingly connected with the vehicle body of the carrier.

[0047] The telescopic fork leg provided by the embodiments of the present application, when carrying goods, the outer rotor motor and the driven caster jointly drive the bottom plate and the lifting assembly to extend out of the carrier and enter the gap between the goods and the ground. After the goods are lifted by the lifting assembly, the vehicle body of the carrier is moved to the bottom of the goods to carry the goods. Since the telescopic fork leg of the present application uses the outer rotor motor to extend and retract, the stability of the telescopic fork leg is improved, ensuring that the telescopic fork leg successfully realizes the picking of goods and improving the efficiency of carrying goods.

[0048] Of course, implementing any product of the present application does not necessarily require achieving all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0049] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application.

[0050] FIG. 1 is a perspective structural schematic view of a carrier provided by the embodiments of the present application;

[0051] Fig. 2 is a perspective view of a telescopic fork according to an embodiment of the present application;

[0052] Fig. 3a is a perspective view of a motor according to an embodiment of the present application;

[0053] Fig. 3b is another perspective view of the motor according to an embodiment of the present application;

[0054] Fig. 4 is a sectional view of the motor according to an embodiment of the present application;

[0055] Fig. 5 is a top view of the motor according to an embodiment of the present application;

[0056] Fig. 6 is a sectional view of the motor according to an embodiment of the present application;

[0057] Fig. 7a is a perspective view of a telescopic drive assembly according to an embodiment of the present application;

[0058] Fig. 7b is another perspective view of the telescopic drive assembly according to an embodiment of the present application;

[0059] Fig. 8 is a perspective view of the telescopic drive assembly connected to a base plate according to an embodiment of the present application;

[0060] Fig. 9 is a perspective view of the base plate according to an embodiment of the present application.

[0061] Telescopic fork 10; vehicle body 20; base plate 100; telescopic drive assembly 200; outer rotor motor 210; stator shaft 211; outer rotor 212; first end cover assembly 213; first end cover 2131; first bearing 2132; first fixing groove 2133; second end cover assembly 214; second end cover 2141; second bearing 2142; second fixing groove 2143; support shaft protrusion 2144; shaft shoulder 215; rubber coating layer 216; driven caster 300; lifting assembly 400; top plate 410; scissor mechanism 420; first lifting arm 421; second lifting arm 430; lifting power mechanism 440; lifting motor 441; lead screw 442; lead screw nut 443; connecting assembly 500; first mounting plate 510; fixing hole 511; second mounting plate 520; bearing mounting hole 521; third bearing 522; support structure 530; bent support plate 531; connecting plate 532. DETAILED DESCRIPTION

[0062] For the purpose of making the object, technical scheme, and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0063] In order to realize smooth extension and retraction of the telescopic fork leg, the embodiment of the application provides a telescopic fork leg and a carrier.

[0064] FIG. 1 is a perspective structural schematic diagram of a carrier provided by the embodiment of the application, FIG. 2 is a perspective structural schematic diagram of a telescopic fork leg 10 provided by the embodiment of the application, FIG. 3a is a perspective structural schematic diagram of a motor provided by the embodiment of the application, FIG. 3b is another perspective structural schematic diagram of the motor provided by the embodiment of the application, and FIG. 4 is a sectional structural schematic diagram of the motor provided by the embodiment of the application. As shown in FIGS. 1 to 4, the first aspect of the application provides a telescopic fork leg 10, which is applied to a carrier. The telescopic fork leg 10 comprises a bottom plate 100, a telescopic driving assembly 200, a driven caster 300, a lifting assembly 400 and a connecting assembly 500. The bottom plate 100 is used for sliding connection with a vehicle body 20 of the carrier, and the telescopic driving assembly 200, the lifting assembly 400 and the driven caster 300 are sequentially arranged along the length direction of the bottom plate 100. The telescopic driving assembly 200 is connected with the first end of the bottom plate 100 in the length direction through the connecting assembly 500, and the lifting assembly 400 and the driven caster 300 are arranged on the bottom plate 100. The first end of the connecting assembly 500 is fixedly connected with the first end of the bottom plate 100, and the second end of the connecting assembly 500 extends out of the first end of the bottom plate 100 in the length direction. The telescopic driving assembly 200 comprises an outer rotor motor 210, which is installed at the second end of the connecting assembly 500. The outer rotor motor 210 comprises a stator shaft 211 and an outer rotor 212 rotating around the stator shaft 211. The extension direction of the stator shaft 211 is parallel to the width direction of the bottom plate 100, and the outer rotor 212 is used for driving the bottom plate 100 to slide out of the vehicle body 20 of the carrier. The lifting assembly 400 is used for lifting goods, and the driven caster 300 is located at the second end of the bottom plate 100 in the length direction and is used for synchronous rotation with the outer rotor 212.

[0065] The telescopic fork leg 10 provided by the embodiment of the application is used for driving the bottom plate 100 and the lifting assembly 400 to extend out of the carrier and enter the gap between the goods and the ground when the goods are carried. After the goods are lifted by the lifting assembly 400, the vehicle body 20 of the carrier is moved to the bottom of the goods to carry the goods. Since the telescopic fork leg 10 of the application adopts the outer rotor motor 210 to realize extension and retraction, the stability of the telescopic fork leg 10 is improved, and the telescopic fork leg 10 can smoothly realize picking of the goods, thereby improving the efficiency of carrying the goods.

[0066] It should be noted that the A side in FIGS. 2 to 4 refers to the first side of the outer rotor motor 210, and the B side refers to the second side of the outer rotor motor 210.

[0067] It should be noted that when the gap between the goods and the ground is relatively narrow, that is, the height and width of the gap are relatively small, the carrier cannot move to the gap between the goods and the ground, resulting in difficulty in carrying the goods by the carrier. The telescopic fork leg 10 provided in the embodiment of the present application can carry goods with a narrow space between the goods and the ground, further reducing the difficulty of carrying goods and improving the efficiency of carrying goods. Since the outer rotor motor 210 is small in size and light in weight, it can realize modular design and be conveniently installed on the bottom plate 100.

[0068] 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 to the lower side of the telescopic fork leg 10.

[0069] Since the outer rotor 212 is large in size in the width direction, the stability of the telescopic fork leg 10 in walking can be improved when the telescopic fork leg 10 is telescoped. The outer rotor motor 210 serves as a power source for the extension of the telescopic fork leg 10, does not increase a speed reducer, and can realize direct driving, so that the telescopic fork leg 10 can be extended, costs are saved, and driving speed is improved. When the outer rotor 212 rotates, the stator shaft 211 does not rotate and only serves as a support. The outer rotor 212 rotates and also serves as a support, and the two-end support form makes the bottom plate 100 and the outer rotor motor 210 bear forces uniformly.

[0070] In some embodiments, as shown in FIGS. 1 to 4, the outer rotor motor 210 further includes a first end cover assembly 213 and a second end cover assembly 214. The first end cover assembly 213 is arranged at the first end of the outer rotor 212 in the axial direction, and the second end cover assembly 214 is arranged at the second end of the outer rotor 212 in the axial direction. The first end of the stator shaft 211 penetrates the first end cover assembly 213 and protrudes out of the first end cover assembly 213, and is fixedly connected with the connecting assembly 500. The first end of the second end cover assembly 214 is provided with a support shaft protrusion 2144 protruding away from the first end cover assembly 213, and is coaxially and spacedly arranged with the stator shaft 211, and the support shaft protrusion 2144 is rotationally connected with the connecting assembly 500.

[0071] In some embodiments, as shown in FIGS. 1 to 4, the first end cover assembly 213 includes a first end cover 2131 and a first bearing 2132. The first end cover 2131 is sleeved on the first end of the stator shaft 211 and is fixedly connected with the outer rotor 212; the first end of the stator shaft 211 penetrates the first end cover assembly 213 and is fixedly connected with the connecting assembly 500.

[0072] The first end cover 2131 is provided with a first fixing groove 2133 on the side facing the second end cover assembly 214. The first bearing 2132 is embedded in the first fixing groove 2133, and the second end of the stator shaft 211 penetrates the first end cover 2131 and the first bearing 2132 in sequence, so that the outer rotor 212 rotates around the stator shaft 211.

[0073] In some embodiments, as shown in FIGS. 1-4, the second end cover assembly 214 includes a second end cover 2141 and a second bearing 2142. The second end cover 2141 is arranged at the second end of the outer rotor 212; the side of the second end cover 2141 facing the first end cover assembly 213 is provided with a second fixing groove 2143. The second bearing 2142 is embedded in the second fixing groove 2143, and the second end of the stator shaft 211 is rotationally connected with the second bearing 2142. The side of the second end cover 2141 facing away from the first end cover assembly 213 is provided with a support shaft protrusion 2144 coaxial with the stator shaft 211, and the support shaft protrusion 2144 is rotationally connected with the second side of the connecting assembly 500.

[0074] FIG. 5 is a top view of the motor according to an embodiment of the present application, FIG. 6 is a sectional view of the motor along the section line A-A in FIG. 5, FIG. 7a is a perspective view of the telescopic drive assembly according to an embodiment of the present application, FIG. 7b is another perspective view of the telescopic drive assembly in FIG. 7a, FIG. 8 is a perspective view of the telescopic drive assembly connected with the base plate according to an embodiment of the present application, and FIG. 9 is a perspective view of the base plate according to an embodiment of the present application. As shown in FIGS. 5-9, in some embodiments, the connecting assembly 500 includes a support structure 530, a first mounting plate 510, and a second mounting plate 520. The support structure 530 is arranged at the first end of the base plate 100 in the length direction and partially extends out of the first end of the base plate 100 in the length direction. The first mounting plate 510 and the second mounting plate 520 are arranged on the two sides of the support structure 530 parallel to the width direction of the base plate 100. The first end of the stator shaft 211 is fixedly connected with the first mounting plate 510, and the side of the second end cover assembly 214 facing away from the first end cover assembly 213 is rotationally connected with the second mounting plate 520, i.e., the support shaft protrusion 2144 is rotationally connected with the second mounting plate 520.

[0075] It should be noted that the first mounting plate 510 is the mounting member of the stator shaft 211, and the second mounting plate 520 is the mounting member of the bearing end.

[0076] In some embodiments, as shown in FIG. 8, the support structure 530 includes a bent support plate 531 and a connecting plate 532. The connecting plate 532 is connected with the first end of the base plate 100 in the length direction through the bent support plate 531, and the first mounting plate 510 and the second mounting plate 520 are both connected with the connecting plate 532. The bent support plate 531 includes a vertical portion and a horizontal portion. The vertical portion is fixed to the base plate, and the horizontal portion extends out of the base plate and is connected with the connecting plate 532.

[0077] As shown in Figure 3a, the stator shaft 211 of the flat shaft passes through the fixing hole 511 of the first mounting plate 510, and the support shaft protrusion 2144 on the other side is movably connected to the second mounting plate 520. Then, the first mounting plate 510 and the second mounting plate 520 are fixed to the connecting plate 532 by bolts to prevent the outer rotor motor 210 from moving left and right.

[0078] In some embodiments, as shown in Figures 7a and 7b, the first end of the second mounting plate 520 away from the base plate is provided with a bearing mounting hole 521, and a third bearing 522 is provided in the bearing mounting hole 521. The support shaft protrusion 2144 of the second end cover assembly 214 is rotatably connected to the second mounting plate 520 through the third bearing 522.

[0079] In some embodiments, as shown in Figures 7a and 7b, a fixing hole 511 is provided at the first end of the first mounting plate 510, and the first end of the stator shaft 211 is fixed to the fixing hole 511. When the stator shaft 211 is a flat shaft, the upper and lower ends of the fixing hole 511 mate with the upper and lower tangential surfaces of the flat shaft.

[0080] In other embodiments, the sidewall of the fixing hole 511 may be provided with a third fixing groove, and a fixing member is provided on the side of the first end of the stator shaft 211, and the stator shaft 211 is embedded in the fixing hole 511 through the fixing member.

[0081] In some embodiments, a positioning pin is provided on the top of the connecting plate 532, and a positioning hole adapted to the positioning pin is provided on the bending support plate 531. The positioning pin and positioning hole cooperate to ensure accurate installation and positioning of the connecting plate 532, that is, accurate installation and positioning of the telescopic drive assembly 200. The second end of the first mounting plate 510 is bolted to one side of the connecting plate 532, and the second end of the second mounting plate is bolted to the other side of the connecting plate. A positioning pin can be provided on one side of the second end of the first mounting plate and one side of the connecting plate, and a positioning hole can be provided on the other side of the second end of the first mounting plate and the other side of the connecting plate. The positioning pin and positioning hole cooperate to ensure accurate positioning of the first mounting plate and the connecting plate. Similarly, a positioning pin and positioning hole can be provided on the second end of the second mounting plate and the other side of the connecting plate to ensure accurate positioning.

[0082] In some embodiments, the outer rotor motor 210 further includes a rubber coating layer 216 sleeved on the outer peripheral surface of the outer rotor 212. By providing the rubber coating layer 216, damage to the outer peripheral surface of the outer rotor 212 can be avoided, and shock absorption can be provided during the movement of the outer rotor.

[0083] In some embodiments, a shoulder 215 is provided at the first end of the stator shaft 211, which is used to abut against the second end of the connecting assembly. The abutment between the shoulder 215 and the second end of the connecting assembly 500 achieves axial positioning of the external rotor motor 210, ensuring accurate positioning.

[0084] In some embodiments, the stator shaft 211 is a flat shaft as shown in Fig. 3a, which facilitates the fixation of the stator shaft 211.

[0085] In some embodiments, the lifting assembly 400 includes a top plate 410, a scissor mechanism 420 and a lifting power mechanism 440 as shown in Fig. 2. The top plate 410 is used to lift the goods. One end of the scissor mechanism 420 is connected to the top plate 410, and the scissor mechanism 420 is used to lift the top plate 410. The lifting power mechanism 440 is arranged on the base plate 100. The lifting power mechanism 440 is connected to the other end of the scissor mechanism 420, and the lifting power mechanism 440 is used to provide lifting power to the scissor mechanism 420.

[0086] Specifically, the scissor mechanism 420 includes a first lifting arm 421 and a second lifting arm 430. The first end of the first lifting arm 421 is slidably connected to the top plate 410, and the second end of the first lifting arm 421 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 421 is hingedly connected to the second lifting arm 430. The lifting power mechanism 440 is arranged on the base plate 100. The lifting power mechanism 440 is connected to the second end of the first lifting arm 421 to drive the second end of the first lifting arm 421 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 421.

[0087] When the goods are transported, as the telescopic drive assembly 200 extends the lifting assembly 400 on the base plate 100 out of the vehicle body 20 of the transport vehicle, the lifting power mechanism 440 drives the second end of the first lifting arm 421 to move towards the second end of the second lifting arm 430, the included angle between the first lifting arm 421 and the second lifting arm 430 decreases, and the top plate 410 is raised to lift the goods. Then, the vehicle body of the transport vehicle is moved to the bottom of the goods to transport the goods. Finally, the lifting power mechanism 440 drives the second end of the first lifting arm 421 to move away from the second end of the second lifting arm 430, the included angle between the first lifting arm 421 and the second lifting arm 430 increases, and the top plate 410 is lowered to place the goods at the target position.

[0088] Alternatively, when the goods are being carried, as the telescopic drive assembly 200 extends the lifting assembly 400 on the bottom plate 100 out of the vehicle body 20 of the carrier, 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 421, the angle between the first lifting arm 421 and the second lifting arm 430 decreases, and the top plate 410 is lifted to lift the goods. Then, the vehicle body of the carrier is moved 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 421, the angle between the first lifting arm 421 and the second lifting arm 430 increases, and the top plate 410 is lowered to place the goods at the target position.

[0089] In some embodiments, as shown in FIG. 2, 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 arranged on the bottom plate 100. The output shaft of the lifting motor 441 is connected with the lead screw 442 to drive the lead screw 442 to rotate. The lead screw nut 443 is threadedly engaged with the lead screw 442, and the lead screw nut is connected with the other end of the scissor mechanism 420, and the lead screw nut is used to provide lifting power to the scissor mechanism 420 when the lead screw rotates.

[0090] Specifically, the lead screw nut 443 is connected with the second end of the first lifting arm 421, and the lead screw nut 443 is used to drive the second end of the first lifting arm 421 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 with the second end of the second lifting arm 430, and the lead screw nut 443 is used 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 421 when the lead screw 442 rotates.

[0091] 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 421, 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 421 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 421, 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 421 under the rotation of the lead screw 442.

[0092] Alternatively, when the lifting power mechanism 440 drives the second end of the first lifting arm 421 to move towards the second end of the second lifting arm 430, the screw nut 443 drives the second end of the first lifting arm 421 to move towards the second end of the second lifting arm 430 under the rotation of the screw rod 442. When the lifting power mechanism 440 drives the second end of the first lifting arm 421 to move away from the second end of the second lifting arm 430, the screw nut 443 drives the second end of the first lifting arm 421 to move away from the second end of the second lifting arm 430 under the rotation of the screw rod 442.

[0093] In some embodiments, the second end of the bottom plate 100 is provided with a driven caster mounting structure, and the driven caster 300 is elastically connected to the second end of the bottom plate 100 through the driven caster mounting structure. 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 second end of the bottom plate 100, the driven caster can swing up and down around the extension direction of the telescopic fork leg 10, ensuring that the driven caster 300 is always in contact with the ground and supports the bottom plate 100. The driven caster mounting structure can be a spring, i.e., the driven caster 300 is elastically connected to the second end of the bottom plate 100 through the spring.

[0094] The second aspect of the present application provides a carrier, as shown in FIG. 1, which includes the telescopic fork leg 10 and the vehicle body 20, and the bottom plate 100 of the telescopic fork leg 10 is slidingly connected to the vehicle body 20 of the carrier.

[0095] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A telescoping fork leg, characterized by, The utility model is applied to a carrier, which comprises a bottom plate (100), a telescopic drive assembly (200), a driven caster (300), a lifting assembly (400) and a connecting assembly (500); The bottom plate (100) is used for being slidably connected with a vehicle body (20) of the carrier; The telescopic drive assembly (200), the lifting assembly (400) and the driven caster (300) are sequentially arranged along the length direction of the bottom plate (100); the telescopic drive assembly (200) is connected with the first end of the bottom plate (100) in the length direction through the connecting assembly (500), and the lifting assembly (400) and the driven caster (300) are arranged on the bottom plate (100); The first end of the connecting assembly (500) is fixedly connected with the first end of the bottom plate (100), and the second end of the connecting assembly (500) extends beyond the first end of the bottom plate (100) along the length direction of the bottom plate (100); The telescopic drive assembly (200) comprises an outer rotor motor (210); the outer rotor motor (210) is mounted on the second end of the connecting assembly (500); The outer rotor motor (210) comprises a stator shaft (211) and an outer rotor (212) rotating around the stator shaft (211); wherein the extension direction of the stator shaft (211) is parallel to the width direction of the bottom plate (100), and the outer rotor (212) is used for driving the bottom plate (100) to slide out of the vehicle body (20) of the carrier; The lifting assembly (400) is used for lifting goods, and the driven caster (300) is located at the second end of the bottom plate (100) in the length direction and is used for rotating synchronously with the outer rotor (212).

2. The telescoping fork leg of claim 1, wherein, The outer rotor motor (210) further comprises a first end cover assembly (213) and a second end cover assembly (214); The first end cover assembly (213) is arranged at the first end in the axial direction of the outer rotor (212), and the second end cover assembly (214) is arranged at the second end in the axial direction of the outer rotor (212); The first end of the stator shaft (211) penetrates through the first end cover assembly (213) and extends out of the first end cover assembly (213) to be fixedly connected with the connecting assembly (500); The first end of the second end cover assembly (214) is provided with a support shaft protrusion (2144) which protrudes away from the first end cover assembly (213) and is coaxially and spacedly arranged with the stator shaft (211), and the support shaft protrusion (2144) is rotationally connected with the connecting assembly (500).

3. The telescoping fork leg of claim 2, wherein, The first end cover assembly (213) comprises a first end cover (2131) and a first bearing (2132); The first end cover (2131) is sleeved on the first end of the stator shaft (211) and is fixedly connected with the outer rotor (212); the first end of the stator shaft (211) extends out of the first end cover assembly (213) to be fixedly connected with the connecting assembly (500); The first end cover (2131) is provided with a first fixing groove (2133) on one side facing the second end cover assembly (214); The first bearing (2132) is embedded in the first fixing groove (2133); the second end of the stator shaft (211) is sequentially arranged in the first end cover (2131) and the first bearing (2132), so that the outer rotor (212) rotates around the stator shaft (211); The second end cover assembly (214) comprises a second end cover (2141) and a second bearing (2142); The second end cover (2141) is arranged at the second end of the outer rotor (212); the second end cover (2141) is provided with a second fixing groove (2143) on one side facing the first end cover assembly (213); The second bearing (2142) is embedded in the second fixing groove (2143); the second end of the stator shaft (211) is rotationally connected with the second bearing (2142); The second end cover (2141) is provided with the support shaft protrusion (2144) coaxial with the stator shaft (211) on the side away from the first end cover assembly (213); the support shaft protrusion (2144) is rotationally connected with the connecting assembly (500).

4. The telescoping fork leg of claim 2, wherein, The connecting assembly (500) comprises a support structure (530), a first mounting plate (510) and a second mounting plate (520); The support structure (530) is arranged at the first end of the length direction of the bottom plate (100); part of the support structure (530) protrudes from the first end of the length direction of the bottom plate (100); The first mounting plate (510) and the second mounting plate (520) are arranged on the support structure (530) and parallel to the two sides of the width direction of the bottom plate (100); The first end of the stator shaft (211) is fixedly connected with the first mounting plate (510); The support shaft protrusion (2144) of the second end cover assembly (214) is rotationally connected with the second mounting plate (520).

5. The telescoping fork leg of claim 4, wherein, The support structure (530) comprises a bent support plate (531) and a connecting plate (532); The connecting plate (532) is connected with the first end of the length direction of the bottom plate (100) through the bent support plate (531); the first mounting plate (510) and the second mounting plate (520) are both connected with the connecting plate (532).

6. The telescoping fork leg of claim 4, wherein, The first mounting plate (510) is provided with a fixing hole (511) away from the first end of the bottom plate (100); the first end of the stator shaft (211) is fixed in the fixing hole (511).

7. The telescoping fork leg of claim 4, wherein, The second mounting plate (520) is provided with a bearing mounting hole (521) away from the first end of the bottom plate (100); the bearing mounting hole (521) is provided with a third bearing (522); the support shaft protrusion (2144) of the second end cover assembly (214) is rotationally connected with the second mounting plate (520) through the third bearing (522).

8. The telescoping fork leg of claim 5, wherein, The top of the connecting plate (532) is provided with a positioning pin, and the bent supporting plate (531) is provided with a positioning hole matched with the positioning pin; the second end of the first mounting plate (510) is bolted with one side of the connecting plate (532), and the second end of the second mounting plate (520) is bolted with the other side of the connecting plate (532).

9. A telescoping fork leg according to any one of claims 1 to 8, wherein, The outer rotor motor (210) further comprises a rubber layer (216) sleeved on the outer circumferential surface of the outer rotor (212).

10. A telescoping fork leg according to any one of claims 1 to 8, wherein, The first end of the stator shaft (211) is provided with a shaft shoulder (215) for abutting with the second end of the connecting assembly (500).

11. A telescoping fork leg according to any one of claims 1 to 8, wherein, The stator shaft (211) is a flat shaft.

12. A telescoping fork leg according to any one of claims 1 to 8, wherein, The lifting assembly (400) comprises: a top plate (410) for lifting goods; a scissor mechanism (420) connected with the top plate (410) at one end, the scissor mechanism (420) being used for lifting the top plate (410); a lifting power mechanism (440) arranged on the bottom plate (100), the lifting power mechanism (440) being connected with the other end of the scissor mechanism (420), and the lifting power mechanism (440) being used for providing lifting power to the scissor mechanism (420).

13. The telescoping fork leg of claim 12, wherein, The lifting power mechanism (440) comprises: a lifting motor (441) arranged on the bottom plate (100); a lead screw (442) connected with the output shaft of the lifting motor (441) to drive the lead screw (442) to rotate; a lead screw nut (443) threadedly matched with the lead screw (442), the lead screw nut (443) being connected with the other end of the scissor mechanism (420), and the lead screw nut (443) being used for providing lifting power to the scissor mechanism (420) when the lead screw (442) rotates.

14. The telescoping prong of any of claims 1-8, wherein, The second end of the bottom plate (100) is provided with a driven caster wheel (300) mounting structure, and the driven caster wheel (300) is elastically connected with the second end of the bottom plate (100) through the driven caster wheel (300) mounting structure.

15. A cart, comprising: The telescopic fork leg (10) and the vehicle body (20) are connected with each other in sliding mode. The telescopic fork leg (10) and the vehicle body (20) are connected with each other in sliding mode.

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