Unmanned fork truck

Abstract

The utility model provides a kind of unmanned forklift, it includes chassis and outer portal, outer portal can be moved along the front-back direction of unmanned forklift relative chassis, unmanned forklift further include transmission assembly and guide component, transmission assembly includes rack, gear and power device, rack extends along the front-back direction of unmanned forklift, the meshing surface of rack is set downward, gear is rotatably connected in the side of outer portal, gear is engaged with rack, power device is connected in gear and is used to drive gear rotation.Guide component is used to guide outer portal and move along the front-back direction of unmanned forklift relative chassis.The meshing surface of rack is set downward, not easy to accumulate dust and stain, reduce the wear and tear of gear and rack.By setting guide component, gear is engaged with rack from below to above, the gravity of outer portal itself and the load on outer portal are borne by guide component, avoid acting on the meshing surface of gear and rack, further reduce the wear and tear of gear and rack, improve the service life of unmanned forklift.

Description

Technical Field

[0001] This utility model relates to the field of unmanned forklifts, and in particular to an unmanned forklift. Background Technology

[0002] With the rapid development of my country's manufacturing and logistics industries, automated warehouse storage has become a basic requirement for all industries. Reach trucks, especially AGV forklifts, are becoming increasingly widely used due to their environmental protection and energy saving, low noise, high lifting capacity, and small working space.

[0003] In existing reach truck technology, the external mast and chassis are connected by a transmission assembly. Since reach trucks are used in environments with dust or dirt, such as factories and workshops, dust and liquid droplets can enter the transmission assembly during use, causing wear and tear on the transmission assembly. At the same time, the lubricant is easily contaminated, the coefficient of friction increases, the transmission efficiency decreases, and the service life of the reach truck is affected. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the gear rack of the existing reach truck that is easy to wear and the transmission efficiency is reduced, and to provide an unmanned forklift.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An unmanned forklift includes a chassis and an outer mast, the outer mast being movable relative to the chassis in a longitudinal direction. The unmanned forklift further includes a transmission assembly and a guide assembly, the transmission assembly comprising:

[0007] A rack, the rack extending along the front-rear direction, the meshing surface of the rack facing downwards;

[0008] A gear, which is rotatably connected to the side of the outer gantry and meshes with the rack;

[0009] A power unit, which is connected to the gear and is used to drive the gear to rotate;

[0010] The guide assembly is used to guide the outer gantry to move relative to the chassis in the front-rear direction.

[0011] In this technical solution, by setting the meshing surface of the rack in the transmission assembly downwards, the gear meshes with the rack, making it less prone to accumulating dust and dirt on the meshing surface of the rack, thus reducing wear on the gears and rack. Simultaneously, by incorporating a guide assembly to guide the outer mast to move in the forward and backward direction of the unmanned forklift, the gear meshes with the rack from bottom to top. The guide assembly bears the weight of the outer mast itself and the load on the outer mast, preventing the weight and load of the outer mast from acting on the meshing surface of the gears and rack, further reducing wear on the gears and rack, and extending the service life of the unmanned forklift.

[0012] Preferably, there are two gears, which are rotatably connected to both sides of the outer mast along the width direction of the unmanned forklift. The rack and the gear are arranged in a one-to-one correspondence, and the gear meshes with the corresponding rack.

[0013] Preferably, the power unit includes a motor and a drive shaft, with two gears respectively connected to both ends of the drive shaft, and the motor is connected to the drive shaft to drive the gears to rotate.

[0014] In this technical solution, the motor drives the gears on both sides simultaneously via the transmission shaft, ensuring that the left and right racks are subjected to consistent force, and that the outer gantry moves back and forth without uneven load.

[0015] Preferably, the guide assembly is disposed below the transmission assembly.

[0016] In this technical solution, the guide component is located below the transmission component, which shields the transmission component and reduces the accumulation of dust and dirt on the guide component.

[0017] Preferably, the guide component includes:

[0018] A first guide member is disposed on the chassis;

[0019] A second guide member is disposed on the outer gantry, and the first guide member and the second guide member cooperate to guide the outer gantry to move relative to the chassis in the front-rear direction.

[0020] Preferably, the first guide member is a guide rail extending along the front-rear direction, and the second guide member is a guide wheel. The guide wheel is rotatably connected to the side of the outer gantry and is rolled on the guide rail.

[0021] In this technical solution, by setting the guide component as a structure of guide rail and guide wheel, and the friction between the guide wheel and the guide component is rolling friction, the resistance when the outer gantry moves relative to the chassis can be reduced.

[0022] Preferably, the guide rail is disposed below the gear, and there is a gap between the upper surface of the guide rail and the gear.

[0023] In this technical solution, by placing the guide rail below the gear and having a gap between the upper surface of the guide rail and the gear, friction between the gear and the guide rail is avoided. At the same time, when the rack and gear do not mesh properly, the guide rail has a certain limiting effect on the gear, preventing the gear and rack from separating significantly.

[0024] Preferably, the guide wheel unit includes two guide wheel groups, each guide wheel group includes two guide wheels, the two guide wheel groups are spaced apart along the front-rear direction, and the two guide wheels in each guide wheel group are respectively rotatably connected to both sides of the outer mast along the width direction of the unmanned forklift;

[0025] The number of guide rails is two, and the two guide rails are set on both sides of the width direction of the unmanned forklift.

[0026] In this technical solution, the two guide wheel sets and the double guide rails form a four-point support, which can distribute the load of the outer gantry on the chassis and improve the stability of the outer gantry movement.

[0027] Preferably, the two guide wheels in each guide wheel assembly are arranged coaxially.

[0028] In this technical solution, the guide wheels within the same group are arranged coaxially, which can further improve the stability of the outer gantry when it moves.

[0029] Preferably, the chassis includes a chassis body, drive wheels and a support assembly, the drive wheels and the support assembly are both disposed on the chassis body, the drive wheels are used to support the forklift and drive the forklift to move, and the support assembly is disposed on the front side of the drive wheels;

[0030] The support assembly includes a slide rail and a support leg. The slide rail is disposed on the chassis body and has a groove. The support leg is slidably connected to the groove and can slide at a first end and a second end of the groove. At the first end, the bottom end of the support leg is higher than the bottom end of the drive wheel, and at the second end, the bottom end of the support leg is flush with the bottom end of the drive wheel.

[0031] In this technical solution, after the support legs extend, the center of gravity of the reach truck shifts forward, which can reduce the overturning moment of the entire vehicle when the forks are extended and improve the reliability of the unmanned forklift.

[0032] Preferably, the first end is located in front of the second end, and the groove is inclined from top to bottom along the direction from the first end toward the second end.

[0033] In this technical solution, the slide is arranged at an angle from top to bottom along the direction from the first end to the second end. Under the action of gravity, the support leg can self-lock at any position in the slide and can be extended without additional locking mechanism. Moreover, the extension length of the support leg is different at different positions, which can adapt to the ground with different flatness.

[0034] The positive and progressive effects of this invention are as follows: By setting the meshing surface of the rack in the transmission assembly downwards, the gear meshes with the rack, making it less prone to accumulating dust and stains on the meshing surface of the rack, thus reducing wear on the gear and rack. Simultaneously, by incorporating a guide assembly to guide the outer mast to move in the forward and backward direction of the unmanned forklift, the gear meshes with the rack from bottom to top. The guide assembly bears the weight of the outer mast itself and the load on the outer mast, preventing the weight and load of the outer mast from acting on the meshing surface of the gear and rack, further reducing wear on the gear and rack, and extending the service life of the unmanned forklift. Attached Figure Description

[0035] Figure 1 This is a partial structural schematic diagram (I) of an embodiment of the unmanned forklift of the present invention.

[0036] Figure 2 This is a partial structural schematic diagram (II) of an embodiment of the unmanned forklift of the present invention.

[0037] Figure 3 This is a partial structural schematic diagram (III) of an embodiment of the unmanned forklift of the present invention.

[0038] Figure 4 This is a schematic diagram of the structure of a transmission component according to an embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the chassis structure according to an embodiment of the present invention (I).

[0040] Figure 6 This is a schematic diagram (II) of the chassis structure according to an embodiment of the present invention.

[0041] Figure 7 This is a schematic diagram of the structure of a support component according to an embodiment of the present invention.

[0042] Figure 8 This is a schematic diagram of the slide rail according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] Chassis 100

[0045] External gantry 200

[0046] rack 31

[0047] Gear 32

[0048] Power unit 33

[0049] Motor 331

[0050] Drive shaft 332

[0051] Guide component 400

[0052] First guide component 41

[0053] Second guide component 42

[0054] Support component 500

[0055] Support leg 51

[0056] Slide rail 52

[0057] 502 Slide

[0058] Drive wheel 600 Detailed Implementation

[0059] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0060] like Figures 1-8 As shown, this embodiment provides an unmanned forklift, which includes a chassis 100 and an outer mast 200. The outer mast 200 is movable relative to the chassis 100 in the longitudinal direction of the unmanned forklift. The unmanned forklift also includes a transmission assembly and a guide assembly 400. The transmission assembly includes a rack 31, a gear 32, and a power unit 33. The rack 31 extends in the longitudinal direction of the unmanned forklift, with its meshing surface facing downwards. The gear 32 is rotatably connected to the side of the outer mast 200 and meshes with the rack 31. The power unit 33 is connected to the gear 32 and drives the gear 32 to rotate. The guide assembly 400 guides the outer mast 200 to move relative to the chassis 100 in the longitudinal direction of the unmanned forklift. By arranging the meshing surface of the rack 31 in the transmission assembly downwards, and the gear 32 meshing with the rack 31, dust and dirt are less likely to accumulate on the meshing surface of the rack 31, reducing wear on the gear 32 and rack 31. Meanwhile, by setting the guide component 400 to guide the outer mast 200 to move in the front-to-back direction of the unmanned forklift, the gear 32 meshes with the rack 31 from bottom to top. The guide component 400 bears the weight of the outer mast 200 itself and the load on the outer mast 200, which can prevent the weight and load of the outer mast 200 from acting on the meshing surface of the gear 32 and the rack 31, further reducing the wear of the gear 32 and the rack 31 and improving the service life of the unmanned forklift.

[0061] Specifically in this embodiment, such as Figures 1-4As shown, there are two gears 32, which are rotatably connected to both sides of the outer mast 200 along the width direction of the unmanned forklift. A rack 31 is correspondingly arranged with each gear 32, and each gear 32 meshes with its corresponding rack 31. The power unit 33 includes a motor 331 and a drive shaft 332. The two gears 32 are connected to both ends of the drive shaft 332, and the motor 331 is connected to the drive shaft 332 to drive the gears 32 to rotate. The motor 331 drives both gears 32 simultaneously via the drive shaft 332, ensuring that the left and right racks 31 are subjected to equal force, and that the outer mast 200 moves back and forth without uneven load.

[0062] Of course, in other embodiments, multiple gears 32 can also be provided, and in more embodiments, multiple motors 331 can also be provided, with each gear 32 driven by an independent motor 331, which will not be described in detail here.

[0063] In this embodiment, the guide component 400 is disposed below the transmission component. By disposing the guide component 400 below the transmission component, it provides a shielding effect on the transmission component, thereby reducing the accumulation of dust and dirt on the guide component 400.

[0064] Specifically, the guide assembly 400 includes a first guide member 41 and a second guide member 42. The first guide member 41 is mounted on the chassis 100, and the second guide member 42 is mounted on the outer mast 200. The first guide member 41 and the second guide member 42 cooperate to guide the outer mast 200 to move relative to the chassis 100 in the longitudinal direction of the unmanned forklift. The first guide member 41 is a guide rail extending in the longitudinal direction of the unmanned forklift, and the second guide member 42 is a guide wheel. The guide wheel is rotatably connected to the side of the outer mast 200 and is rolled on the guide rail. By setting the guide assembly 400 in the structure of a guide rail and a guide wheel, the friction between the guide wheel and the guide assembly 400 is rolling friction, which can reduce the resistance when the outer mast 200 moves relative to the chassis 100.

[0065] In other embodiments, the guide component 400 may also be configured in other structural forms, such as a slider cooperating with the groove 502, etc., which will not be described in detail here.

[0066] In this embodiment, the guide wheel unit includes two guide wheel sets, each guide wheel set including two guide wheels. The two guide wheel sets are spaced apart in the front-to-back direction, and the two guide wheels in each guide wheel set are rotatably connected to both sides of the outer mast 200 along the width direction of the unmanned forklift. There are two guide rails, which are arranged corresponding to both sides of the width direction of the unmanned forklift. The two guide wheel sets and the two guide rails form a four-point support, which can distribute the load of the outer mast 200 on the chassis 100 and improve the stability of the outer mast 200's movement.

[0067] Of course, in other embodiments, multiple sets of guide wheel units can be provided to reduce the load on each guide wheel set and improve the durability of the equipment.

[0068] Specifically, in this embodiment, the two guide wheels in each guide wheel group are arranged coaxially. The coaxial arrangement of the guide wheels within the same group can further improve the stability of the outer gantry 200 when it moves.

[0069] Meanwhile, the guide rail is positioned below the gear 32, and there is a gap between the upper surface of the guide rail and the gear 32. By positioning the guide rail below the gear 32 and having a gap between the upper surface of the guide rail and the gear 32, friction between the gear 32 and the guide rail is avoided. At the same time, when the rack 31 and the gear 32 do not mesh properly, the guide rail has a certain limiting effect on the gear 32, preventing the gear 32 and the rack 31 from separating significantly.

[0070] In this embodiment, as Figures 5-8 As shown, the chassis 100 includes a chassis 100 body, drive wheels 600, and a support assembly 500. Both the drive wheels 600 and the support assembly 500 are mounted on the chassis 100 body. The drive wheels 600 support the forklift and drive its movement. The support assembly 500 is located in front of the drive wheels 600. The support assembly 500 includes a slide rail 52 and support legs 51. The slide rail 52 is mounted on the chassis 100 body and has a groove 502. The support legs 51 are slidably connected to the groove 502, allowing them to slide at both ends. At the first end, the bottom of the support leg 51 is higher than the bottom of the drive wheel 600; at the second end, the bottom of the support leg 51 is flush with the bottom of the drive wheel 600. When the support legs 51 extend, the center of gravity of the reach truck shifts forward, reducing the tipping moment when the forks extend and improving the reliability of the unmanned forklift.

[0071] Specifically, the first end is located in front of the second end, and the slide 502 is inclined from top to bottom along the direction from the first end to the second end. The slide 502 is arranged in an inclined manner from top to bottom along the direction from the first end to the second end. Under the action of gravity, the support leg 51 can self-lock in any position within the slide 502 and can remain extended without the need for an additional locking mechanism. Moreover, the extension length of the support leg 51 is different at different positions, which can adapt to ground with different flatness.

[0072] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An unmanned forklift, comprising a chassis and an outer mast, the outer mast being movable relative to the chassis in the longitudinal direction of the unmanned forklift, characterized in that, The unmanned forklift also includes a transmission assembly and a guiding assembly, the transmission assembly comprising: A rack, the rack extending along the front-rear direction, the meshing surface of the rack facing downwards; A gear, which is rotatably connected to the side of the outer gantry and meshes with the rack; A power unit, which is connected to the gear and is used to drive the gear to rotate; The guide assembly is used to guide the outer gantry to move relative to the chassis in the front-rear direction.

2. The unmanned forklift as described in claim 1, characterized in that, The number of gears is two, and the two gears are rotatably connected to both sides of the outer mast along the width direction of the unmanned forklift. The rack and the gear are arranged in a one-to-one correspondence, and the gear meshes with the corresponding rack.

3. The unmanned forklift as described in claim 2, characterized in that, The power unit includes a motor and a drive shaft. The two gears are respectively connected to both ends of the drive shaft. The motor is connected to the drive shaft to drive the gears to rotate.

4. The unmanned forklift as described in claim 3, characterized in that, The guide assembly is located below the transmission assembly.

5. The unmanned forklift as described in claim 1, characterized in that, The guiding component includes: A first guide member is disposed on the chassis; A second guide member is disposed on the outer gantry, and the first guide member and the second guide member cooperate to guide the outer gantry to move relative to the chassis in the front-rear direction.

6. The unmanned forklift as described in claim 5, characterized in that, The first guide member is a guide rail extending along the front-rear direction, and the second guide member is a guide wheel unit. The guide wheel unit is rotatably connected to the side of the outer gantry, and the guide wheel is rolled on the guide rail.

7. The unmanned forklift as described in claim 6, characterized in that, The guide rail is disposed below the gear, and there is a gap between the upper surface of the guide rail and the gear; And / or, the guide wheel unit includes two guide wheel groups, each guide wheel group includes two guide wheels, the two guide wheel groups are spaced apart along the front-rear direction, and the two guide wheels in each guide wheel group are respectively rotatably connected to both sides of the outer mast along the width direction of the unmanned forklift; The number of guide rails is two, and the two guide rails are set on both sides of the width direction of the unmanned forklift.

8. The unmanned forklift as described in claim 7, characterized in that, The two guide wheels in each guide wheel assembly are arranged coaxially.

9. The unmanned forklift as described in claim 1, characterized in that, The chassis includes a chassis body, drive wheels and a support assembly. The drive wheels and the support assembly are both mounted on the chassis body. The drive wheels are used to support the forklift and drive the forklift to move. The support assembly is located on the front side of the drive wheels. The support assembly includes a slide rail and a support leg. The slide rail is disposed on the chassis body and has a groove. The support leg is slidably connected to the groove and can slide at a first end and a second end of the groove. At the first end, the bottom end of the support leg is higher than the bottom end of the drive wheel, and at the second end, the bottom end of the support leg is flush with the bottom end of the drive wheel.

10. The unmanned forklift as described in claim 9, characterized in that, The first end is located in front of the second end, and the groove is inclined from top to bottom along the direction from the first end toward the second end.

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