CN220723495U - Industrial vehicle suitable for narrow roadway - Google Patents

Abstract

The utility model relates to the field of automatic mechanical equipment, in particular to a whole vehicle structural design of an industrial vehicle. The utility model is realized by the following technical scheme: the industrial vehicle suitable for the narrow roadway is characterized by comprising a main part and a turnover part rotationally connected with the main part, wherein the main part comprises a main frame and a traveling device arranged on the main frame, the turnover part comprises a rotating frame and a fork arranged on the rotating frame, and the turnover part rotates in the horizontal direction. The utility model aims to provide an industrial vehicle suitable for a narrow roadway, which not only can carry out normal goods taking and unloading operations, but also is not easy to collide with a goods shelf in the turning process of the vehicle, thereby improving the operation safety in the narrow roadway environment.

Description

Industrial vehicle suitable for narrow roadway

Technical Field

The utility model relates to the field of automatic mechanical equipment, in particular to a whole vehicle structural design of an industrial vehicle.

Background

Industrial vehicles refer to powered motor vehicles used to carry, push, pull, lift, stack, or stack various cargo. Common industrial vehicles are forklifts, side forklifts, tractors, trucks, fork lifts, and the like.

As disclosed in chinese patent document publication No. cn201820228556.X, an industrial vehicle, in the specific form of a forklift truck, is disclosed. The forklift comprises a main body, a traveling device, a lifting device and a fork. The user drives the industrial vehicle to walk between the shelves, and the height of the fork is adjusted through the lifting device, so that normal goods taking/discharging operation is performed.

As mentioned above, forklifts comprise a main body and a fork, which in turn must have a long length, which makes the body length of the whole industrial vehicle long, and such body length makes the turning radius of the vehicle during turning in the tunnel very large.

With the increase of logistics storage density, the heights of the shelves are gradually increased, and the distance between adjacent shelves is gradually reduced, namely the roadway is narrower. Industrial vehicles with large turning radius work in a roadway, and particularly, collision between the vehicles and a goods shelf is easily caused in the links of turning, turning around and turning in and out of the roadway. The process has larger potential safety hazard, causes damage to the goods shelf and unstable gravity center of goods on the vehicle, and easily causes the goods shelf to topple over when serious.

Disclosure of Invention

The utility model aims to provide an industrial vehicle suitable for a narrow roadway, which not only can carry out normal goods taking and unloading operations, but also is not easy to collide with a goods shelf in the turning process of the vehicle, thereby improving the operation safety in the narrow roadway environment.

The utility model is realized by the following technical scheme: the industrial vehicle suitable for the narrow roadway is characterized by comprising a main part and a turnover part rotationally connected with the main part, wherein the main part comprises a main frame and a traveling device arranged on the main frame, the turnover part comprises a rotating frame and a fork arranged on the rotating frame, and the turnover part rotates in the horizontal direction.

Preferably, the main part further includes a door frame connected to the main frame, the industrial vehicle further includes a lift frame connected to the door frame and lifted in a height direction, and the turning part is rotatably connected to the lift frame.

Preferably, the rotating frame is connected with a moving frame, the moving frame is connected with the lifting frame through a traversing device, and the rotating frame horizontally moves relative to the lifting frame in the width direction of the vehicle.

Preferably, the traversing device comprises a traversing driver and a gear, wherein a traversing rack extending in the horizontal direction is mounted on the lifting frame, and the gear is meshed with the traversing rack.

Preferably, the gear comprises an upper gear and a lower gear, which are connected by a rotation shaft, wherein the rotation shaft extends in the vertical direction and is driven to rotate by the traversing driver.

Preferably, the traversing device further comprises a positioning wheel which is abutted against the surface of the lifting frame so as to increase traversing stability, wherein the positioning wheel comprises a positive positioning wheel abutted against one surface of the lifting frame, which is close to the fork, and a negative positioning wheel abutted against one surface of the lifting frame, which is far away from the fork.

Preferably, the reverse positioning wheel comprises an upper reverse positioning wheel and a lower reverse positioning wheel, and the height positions of the upper reverse positioning wheel and the lower reverse positioning wheel respectively correspond to the height positions of the upper gear and the lower gear.

Preferably, the positive locating wheel comprises an upper positive locating wheel and a lower positive locating wheel, the lower positive locating wheel is positioned below the upper positive locating wheel, and the axial thickness dimension of the lower positive locating wheel is larger than that of the upper positive locating wheel.

Preferably, the positioning wheel further comprises a vertical positioning wheel abutting against the upper surface of the lifting frame.

Preferably, the utility model further comprises a drag chain, wherein one end of the drag chain is connected with the lifting frame, the other end of the drag chain is connected with the moving frame, and the inner cavity of the drag chain is used for cable routing.

Preferably, the rotating device is a rotating oil cylinder, and comprises a cylinder body fixedly connected with the moving frame and a rotating shaft connected with the hanging plate, wherein the hanging plate is connected with a mounting plate, and the mounting plate is positioned below the cylinder body and is rotationally connected with the cylinder body.

Preferably, the moving frame comprises a detector mounting plate and a rotating shaft mounting plate, and the rotation detector is mounted on the detector mounting plate.

Preferably, the rotation detectors are three, namely a left limit detector, a right limit detector and a centering detector for detecting a left limit angle, a right limit angle and a centering angle of rotation of the fork.

Preferably, the three rotation detectors are photoelectric sensors, and sensing pieces for matching with the photoelectric sensors are arranged on the fork or the hanging plate.

As the preferable mode of the utility model, the three rotation detectors are microswitches and are arranged at the same height position, the hanging plate is connected with a hanging body connecting plate, and the hanging body connecting plate is provided with a concave induction groove which is used for being matched with the three microswitches.

Preferably, the fork comprises a fork body and a contact detector which is arranged on the fork body and is used for detecting the position of goods on the fork body.

As the preferable mode of the utility model, the fork body is provided with a containing area for containing the contact detector, and the fork body is movably connected with a touch plate for abutting against goods.

Preferably, the contact detector comprises a swing rod rotatably connected with the fork body and a contact connected with the end part of the swing rod for contacting with the touch plate.

Preferably, the contact plate and the fork body are connected through a torsion spring.

Preferably, the compensation block is arranged on one surface of the touch plate, which is close to the goods, in a protruding mode.

Preferably, the rotating device is a rotating oil cylinder, and comprises a cylinder body fixedly connected with the moving frame and a rotating shaft connected with the hanging plate, wherein the hanging plate is connected with a mounting plate, and the mounting plate is positioned below the cylinder body and is rotationally connected with the cylinder body.

Preferably, the moving frame comprises a detector mounting plate and a rotating shaft mounting plate, and the rotation detector is mounted on the detector mounting plate.

Preferably, the rotation detectors are three, namely a left limit detector, a right limit detector and a centering detector for detecting a left limit angle, a right limit angle and a centering angle of rotation of the fork.

Preferably, the three rotation detectors are photoelectric sensors, and sensing pieces for matching with the photoelectric sensors are arranged on the fork or the hanging plate.

As the preferable mode of the utility model, the three rotation detectors are microswitches and are arranged at the same height position, the hanging plate is connected with a hanging body connecting plate, and the hanging body connecting plate is provided with a concave induction groove which is used for being matched with the three microswitches.

Preferably, the fork comprises a fork body and a contact detector which is arranged on the fork body and is used for detecting the position of goods on the fork body.

As the preferable mode of the utility model, the fork body is provided with a containing area for containing the contact detector, and the fork body is movably connected with a touch plate for abutting against goods.

Preferably, the contact detector comprises a swing rod rotatably connected with the fork body and a contact connected with the end part of the swing rod for contacting with the touch plate.

Preferably, the contact plate and the fork body are connected through a torsion spring.

Preferably, the compensation block is arranged on one surface of the touch plate, which is close to the goods, in a protruding mode.

In summary, the utility model has the following beneficial effects:

1. the whole vehicle is divided into two parts, namely a main part and a turnover part, and the turnover part supports the rotation of the main part in the horizontal direction, so that the horizontal distance between the turnover part and the goods shelf can be adjusted, the reasonable safety distance between the turnover part and the goods shelf is kept, and the turnover part is not easy to collide with the goods shelf.

2. The two-part split design of the vehicle ensures that the turning radius and the track of the whole vehicle are optimized, and the vehicle is convenient to enter and exit the roadway in the environment of a narrow roadway.

3. The fork can horizontally move left and right relative to the vehicle body of the vehicle through the transverse moving device, so that the vehicle can enter and exit the roadway to turn, the track can be optimized through the turning of the turning part, and the track can be further optimized through the transverse moving of the fork.

4. The rotation angle of the fork can be detected and captured, so that the control is convenient.

5. The rotation detector can detect the limit position of the fork in the left direction, the limit position in the right direction and the center position.

6. The contact detector can effectively detect whether the fork is fetched in place, and further improves the safety of stock unloading.

7. If the goods or the tray is bigger, the swing rod of the contact detector can also rotate to match the displacement, so that the contact is not damaged, and the service life of the equipment is prolonged.

8. When the goods or the tray is smaller, the user can additionally install the compensation block on the front surface of the touch plate, so that the goods or the tray can normally push the touch plate.

9. The sideslip sensor and the lifting sensor all adopt pull switch, adopt physical contact, and its data reading is more reliable and stable, avoids the safety problem that the goods fork and goods shelves collide because the inaccurate in reading causes in the in-process of picking up and putting goods of industrial vehicle to the initiation.

10. The mounting position of the lifting sensor is arranged on one side of the width direction of the vehicle body, so that the space arrangement is facilitated, the turning radius of the vehicle cannot be increased, and the lifting sensor is suitable for operation in a narrow roadway.

11. The meshing mode of the upper gear and the lower gear of the transverse moving device can better increase the space structural stability of the transverse moving device, and is not easy to shift, so that the gear and rack meshing is more accurate, and the transverse moving track is more stable and safer.

12. The guy wire redirection design of the lifting sensor and the traversing sensor is further convenient for optimizing the space position of the sensor.

Description of the drawings:

FIG. 1 is a schematic diagram of example 1;

FIG. 2 is a schematic view of another angle of FIG. 1;

fig. 3 is an enlarged detail view at a in fig. 2;

FIG. 4 is a schematic diagram of a lift sensor;

FIG. 5 is a schematic diagram of a traversing sensor;

FIG. 6 is a side view of the traversing device;

FIG. 7 is a schematic view of a turret and fork;

FIG. 8 is an enlarged schematic view of FIG. 7 after concealing the touch panel;

FIG. 9 is a schematic view of another angle of FIG. 7;

fig. 10 is an enlarged schematic view at B in fig. 9.

In the figure:

1. the car body, 11, main frame, 12, portal, 13, running gear, 14, stay guard, 15, long extension plate, 16, steering wheel, 2, shift rack, 21, bend wheel, 22, detector mounting plate, 23, rotation shaft mounting plate, 3, rotation rack, 31, link plate, 32, rotation device, 321, cylinder, 322, rotation shaft, 33, mounting plate, 34, link plate, 341, induction groove, 4, fork, 41, fork body, 411, accommodation area, 42, touch plate, 43, compensation block, 44, contact detector, 45, torsion spring, 5, lifting rack, 51, mating rack, 52, wire connection port, 53, bend wheel, 61, lifting sensor, 62, traversing sensor, 7, traversing device, 71, upper gear, 72, rotation shaft, 73, lower gear, 741, upper positive positioning wheel, 742, lower positive positioning wheel, 751, upper negative positioning wheel, 752, lower negative positioning wheel, 76, vertical positioning wheel, 77, drag chain, 91, rotation detector.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.

Embodiment 1, an industrial vehicle, can be fork truck, heap car, letter sorting car, different types of vehicle types such as AGV, this technical scheme takes the AGV as the example.

As shown in fig. 1, a vehicle body 1, which is a main frame member of an industrial vehicle, is generally made of a metal material, and includes a main frame 11 and a door frame 12. The running gear 13 may include a structure such as a driving wheel, a steering wheel, and an auxiliary wheel, and is mounted on the bottom of the vehicle body 1. The gantry 12 extends in the vertical direction, and the gantry 5 is lifted in the vertical direction by the lifting device. The lifting device can be realized by adopting the structure in the prior art, such as a lifting motor, a chain wheel, a chain and other conventional power and transmission components.

The lifting frame 5 is provided with a moving frame 2, and the moving frame 2 moves in the horizontal direction relative to the lifting frame 5 through a traversing device 7, and specifically, the moving direction is the width direction of the industrial vehicle. In this case, the longitudinal direction of the vehicle is defined as the front-rear direction, and the direction approaching the fork 4 is defined as the front, and vice versa. The rotating frame 3 and the fork 4 are arranged on the moving frame 2, and through the lifting and traversing structure, the lifting and traversing movement and the traversing movement of the fork 4 are finally realized. The rotating frame 3 can rotate in the horizontal direction relative to the moving frame 2, so that the horizontal rotation of the fork 4 is further realized.

In this case, the core of the whole industrial vehicle can be regarded as two modules, a main part and a turnover part, respectively. As shown in fig. 1, the main section includes four major components, i.e., a main frame 11, a gantry 12, a lift 5, and a carriage 2. The turn-over portion comprises two large parts, the turret 3 and the fork 4. This results in that the body dimension of the entire industrial vehicle forms two parts, a main part and a roll-over part, in the longitudinal direction of the vehicle, i.e., in the front-rear direction. The running gear 13 is mounted on the main part.

The main part of the industrial vehicle starts to turn by the turning distance of the vehicle out of the roadway, and at the moment, the main part turns, and the turning part and the main part horizontally rotate, so that the direction of the turning part in the roadway can be unchanged. At this time, the steering radius of the entire vehicle is interrupted, and only the length of the main portion determines the steering radius at this time, instead of determining the steering radius by the entire vehicle length in the related art. The steering radius of the whole industrial vehicle is greatly optimized. Such a two-part design allows adaptation to turning in a narrow lane environment even if the forks 4 have a long length.

The traversing, turning and associated sensing actions of the industrial vehicle are described in more detail below.

As shown in fig. 3 and 6, the lateral movement between the traveling frame 2 and the lifting frame 5, that is, the movement in the vehicle width direction, is achieved by the traversing device 7.

The traversing device 7 is used as a power and transmission part to drive the traversing of the moving frame 2 relative to the lifting frame 5. The traversing device 7 includes a power member, such as a motor, a hydraulic motor, or the like, that drives the rotation shaft 72 to rotate. The rotation shaft 72 extends in the vertical direction, and an upper gear 71 and a lower gear 73 are respectively mounted in different height directions thereof, and racks engaged with the two gears are fixedly mounted on the elevation frame 5. The movable frame 2 connected to the traversing device 7 moves laterally with respect to the lifting frame 5 as the rotation shaft 72 rotates. Because the fork 4 is installed on the moving frame 2, the fork 4 is used as a main cargo loading force bearing component, and a horizontal inclined force arm exists in the whole transverse moving device 7 under the influence of heavy objects. The arm of force can influence the meshing of gear and rack, and then influences sideslip ride comfort. In the scheme, the meshing mode of the upper gear and the lower gear is adopted, so that the space structure stability of the transverse moving device 7 can be better increased, the displacement is difficult, the gear and rack meshing is more accurate, and the transverse moving track is more stable and safer.

Further, in order to further increase the stability of the lateral movement, the present embodiment increases the design of the positioning wheel.

The direction of the lifting frame 5 approaching the fork 4 is positive, and the opposite direction is negative. The connecting shaft 72 is provided with an upper positive positioning wheel 741 and a lower positive positioning wheel 742 which are abutted against the front surface of the lifting frame 5. While the axial dimension of the lower positive positioning wheel 742, i.e., the thickness in the up-down direction in fig. 6, is greater than that of the upper positive positioning wheel 741. This is because, after the pallet fork 4 is loaded with a weight, the lower positive stator 742 will have a larger moment arm due to the lever principle, and will have a tendency to move backward, i.e. to the left in fig. 6. The interference of the lower positive wheels 742 with the lifting frame 5 is reinforced in this case. And the moving frame 2 is also provided with two reverse direction wheels, namely an upper reverse positioning wheel 751 and a lower reverse positioning wheel 752 in fig. 6, which are in contact with the reverse surface of the lifting frame 5. The mounting positions of the two reverse positioning wheels are at the same height with the upper gear 71 and the lower gear 72, so that the positioning pertinence is strong, and the meshing degree of the gears and the racks is better.

Industrial vehicles exist with many electrical cables that are routed orderly through the interior cavity of the drag chain 77.

The traverse distance of the carriage 2 and the lifting distance of the lifting carriage 5 are required to be realized by the traverse sensor 62 and the lifting sensor 61. In the running environment of the industrial vehicle, electromagnetic interference is serious, in the scheme, a pull switch is adopted for both the traversing sensor 62 and the lifting sensor 61, physical contact is adopted, data reading is more stable and reliable, and the safety problem caused by collision of the fork 4 and a goods shelf due to inaccurate reading in the process of taking and placing goods of the industrial vehicle is avoided.

Specifically, as shown in fig. 3 and 4, a wire guard 14 is attached to the main frame 11, and a lift sensor 61 is attached thereto. A long extension plate 15 extending forward is also provided on the main frame 11, on which a direction-changing wheel 16 is provided. The lifting frame 5 is provided with a backward extending matching frame 51, and a connecting port 52 is arranged on the matching frame. The pull wire of the lift sensor 61 passes around the diverting pulley 16 to the wire connection 52. In this case, the direction-changing wheel 16 is in line with the lifting sensor 61 in the horizontal front-rear direction, and the direction-changing wheel 16 is in line with the wire connection port 52 up and down in the vertical direction, so that the lifting action of the lifting frame 5 becomes the horizontal wire outgoing of the lifting sensor 61. The redirection ensures that a certain horizontal front-rear distance is arranged between the mounting pull wire opening 52 and the lifting sensor 61, so that the lifting sensor 61 can conveniently find a position with the narrowest width of the vehicle body for mounting, and the turning radius of the vehicle body is further optimized.

In this case, the mounting position of the lift sensor 61 is mounted on one side in the width direction of the vehicle body 1, and if it is mounted on the bottom of the vehicle body 1, the number of driving mechanical components and electronic components on the bottom is large, which is disadvantageous in terms of space arrangement. If the vehicle is installed in the front-rear direction of the vehicle body 1, the turning radius of the vehicle increases, and the vehicle is not suitable for work in a narrow tunnel.

As shown in fig. 5, the traverse sensor 62 is attached to the carriage 2, and the direction changing wheel 21 is provided to the carriage 2. Corresponding connecting lines are arranged on the traversing frame 5, the connecting lines are collinear with the bend wheel 21 in the horizontal left-right direction, the bend wheel 21 is collinear with the traversing sensor 62 in the vertical direction, and the bend wheel 21 is right below the traversing sensor 62. With the above arrangement, one horizontal traversing motion of the traverse frame 2 is converted into a vertical outgoing line on the traversing sensor 62. In terms of spatial arrangement, the traversing sensor 62 is often mounted in an upper position of the mobile carriage 2, which is abundant in the height direction, and does not affect the turning radius of the vehicle, since the height of the mobile carriage 2 is much smaller than the height of the portal 12.

As shown in fig. 9 and 10, the movable frame 2 can be regarded as a stationary member during the rotation of the fork 4. The power for rotation comes from the rotating device 32, which may be a conventional power component such as a motor, which in this embodiment is a rotary cylinder. The cylinder 321 is fixedly connected with the moving frame 2 and is regarded as a stationary member. The rotating shaft 322 is connected with the hanging body connecting plate 34 and the mounting plate 33, and the three parts are moving parts in the rotating process. The hanging body connecting plate 34 and the mounting plate 33 are connected with the fork 4, so that the fork 4 is driven to rotate.

In the present embodiment, the special rotation detector 91 detects and monitors the rotation angle of the fork 4, thereby further improving the turning safety. Specifically, the moving frame 2 includes a detector mounting plate 22 for connecting the rotation detector 91 and a rotation shaft mounting plate 23 for connecting the rotation shaft 322. The rotation detectors 91 are three, namely a left limit detector, a right limit detector and a centering detector. The device is used for detecting the limit position of the left direction, the limit position of the right direction and the center position of the rotation of the fork 4. As shown in fig. 7, the state of the fork 4 at this time is the left limit position in which the axis is already perpendicular to the axis of the vehicle front-rear direction. While in the centered position, the axis of the fork 4 is horizontal to the axis of the vehicle in the fore-and-aft direction.

As shown in fig. 10, in this embodiment, the rotation detector 91 is a micro switch in the prior art, and can sense the distance between the sensing object and itself. The three microswitches are arranged at the same height, the hanging body connecting plate 34 is provided with a concave induction groove 341 matched with the hanging body connecting plate, and when the non-groove part and the groove part are positioned in front of the microswitches, the non-groove part and the groove part can be distinguished by the microswitches. The result identified by the three micro-switches corresponds to the angular rotation of the fork 4. For example, when the three micro-switches are all in front of the groove portion, this indicates that the fork 4 is located at the center position.

In this embodiment, a design for detecting whether the pallet fork 4 is in place is added, that is, whether the pallet has surely arrived at the designated position of the pallet fork 4. Specifically, as shown in fig. 7 and 8, a contact plate 42 is rotatably connected to the fork 41, and the contact plate 42 is turned over in the vertical direction by a torsion spring 45.

A receiving area 411 is provided on the fork 41 for mounting the contact detector 44. The contact detector 44 includes a swing link and a contact. When the industrial vehicle picks up a good, the good or pallet has the prongs 41 in place, the touch plate 42 is pushed to rotate in a direction approaching the touch detector 44. At this point the contact contacts the back of the touch plate 42, triggering a signal to the control system of the vehicle. And if the goods or the tray is bigger, so that the touch plate 42 moves further, the swing rod of the contact detector 44 also rotates to match the displacement, the contact is not damaged, and the service life of the equipment is prolonged. Further, when the goods or the trays are smaller and the touch panel 42 cannot be pushed normally, the user can add the compensation block 43 on the front surface of the touch panel 42, so that the goods or the trays can push the touch panel 42 normally.

Embodiment 2 differs from embodiment 1 in that the rotation detector 91 is different. In the present embodiment, the rotation detector 91 does not employ a micro switch, but employs a photosensor. Three photoelectric sensors are arranged at different positions, the corresponding positions on the rotating frame 3 can be provided with reflecting plates, when the fork 4 rotates to a proper angle, light emitted by the photoelectric sensors is reflected effectively by touching the reflecting plates, and the light is captured and identified by the photoelectric sensors, so that detection of corresponding angles can be performed.

Embodiment 3 differs from embodiment 1 in that the rotation detector 91 is different. In this embodiment, the rotation detector 91 is an encoder, and an outer ring of the encoder is connected to the moving frame 2, and an inner ring of the encoder is connected to the rotating shaft 322.

Claims (16)

1. The industrial vehicle suitable for narrow tunnel, its characterized in that contains main part and with the tilting part that main part rotated and is connected, main part contains main frame (11) and installs running gear (13) on main frame (11), tilting part contains revolving rack (3) and installs fork on revolving rack (3), tilting part rotates in the horizontal direction, main part still contain with portal (12) that main frame (11) are connected, this kind of industrial vehicle still contain with portal (12) are connected and in lifting frame (5) that go up and down in the direction of height, tilting part with lifting frame (5) rotate and are connected, revolving rack (3) are connected with and move frame (2), move frame (2) through sideslip device (7) with lifting frame (5) are connected, move frame (2) relatively lifting frame (5) are in the horizontal migration in the vehicle width direction, sideslip device (7) contain sideslip driver and gear, install on lifting frame (5) in the horizontal direction with the rack of sideslip is extended.

2. The industrial vehicle for narrow roadways of claim 1, wherein: the gear comprises an upper gear (71) and a lower gear (73), which are connected by means of a rotating shaft (72), wherein the rotating shaft (72) extends in the vertical direction and is driven to rotate by the traversing driver.

3. The industrial vehicle adapted for use in a narrow roadway of claim 2, wherein: the transverse moving device (7) further comprises a positioning wheel which is in contact with the surface of the lifting frame (5) to increase the transverse moving stability, and the positioning wheel comprises a positive positioning wheel which is in contact with one side of the lifting frame (5) close to the fork (4) and a reverse positioning wheel which is in contact with one side of the lifting frame (5) away from the fork (4).

4. An industrial vehicle adapted for use in a narrow roadway as claimed in claim 3, wherein: the reverse positioning wheels comprise an upper reverse positioning wheel (751) and a lower reverse positioning wheel (752), the height positions of which correspond to the height positions of the upper gear (71) and the lower gear (73), respectively.

5. An industrial vehicle adapted for use in a narrow roadway as claimed in claim 3, wherein: the positive positioning wheel comprises an upper positive positioning wheel (741) and a lower positive positioning wheel (742), the lower positive positioning wheel (742) is positioned below the upper positive positioning wheel (741), and the axial thickness dimension of the lower positive positioning wheel (742) is greater than that of the upper positive positioning wheel (741).

6. An industrial vehicle adapted for use in a narrow roadway as claimed in claim 3, wherein: the positioning wheel also comprises a vertical positioning wheel (76) which is abutted against the upper surface of the lifting frame (5).

7. The industrial vehicle for narrow roadways of claim 1, wherein: the cable lifting device is characterized by further comprising a drag chain (77), wherein one end of the drag chain (77) is connected with the lifting frame (5), the other end of the drag chain is connected with the moving frame (2), and an inner cavity of the drag chain (77) is used for cable routing.

8. The industrial vehicle for narrow roadways according to any one of claims 1-7, characterized in that: the rotating frame (3) comprises a hanging plate (31) connected with the fork (4) and a rotating device (32) used for driving the hanging plate (31) to rotate in the horizontal direction relative to the moving frame (2), and the safe goods taking device further comprises a rotation detector (91) used for detecting the rotation angle of the fork (4) relative to the moving frame (2).

9. The industrial vehicle for narrow roadways of claim 8, wherein: the three rotation detectors (91) are respectively a left limit detector, a right limit detector and a centering detector for detecting a left limit angle, a right limit angle and a centering angle of rotation of the fork (4).

10. The industrial vehicle for narrow roadways of claim 9, wherein: the three rotation detectors (91) are micro switches and are arranged at the same height position, a hanging body connecting plate (34) is connected to the hanging plate (31), and a concave induction groove (341) used for being matched with the three micro switches is formed in the hanging body connecting plate (34).

11. The industrial vehicle for narrow roadways of claim 8, wherein: the fork (4) comprises a fork body (41) and a contact detector (44) mounted on the fork body (41) for detecting the position of the load on the fork body (41).

12. The industrial vehicle for narrow roadways of claim 11, wherein: the fork body (41) is provided with a containing area (441) for containing the contact detector (44), the fork body (41) is movably connected with a touch plate (42) for abutting against goods, and the contact detector (44) comprises a swing rod rotationally connected with the fork body (41) and a contact connected with the end part of the swing rod for contacting with the touch plate (42).

13. The industrial vehicle for narrow roadways of claim 8, wherein: the rotation detector (91) is an encoder, the rotating device (32) comprises a rotating shaft (322), the outer ring of the encoder is connected with the moving frame (2), and the inner ring of the encoder is connected with the rotating shaft (322).

14. The industrial vehicle for narrow roadways according to any one of claims 1-7, characterized in that: the lifting frame (5) lifting device is characterized by further comprising a lifting sensor (61) for detecting the lifting height of the lifting frame (5) and a traversing sensor (62) for detecting the traversing distance of the moving frame (2), wherein the lifting sensor (61) and the traversing sensor (62) are pullswitches, the lifting sensor (61) is arranged on one side of the main frame (11) in the width direction, and the traversing sensor (62) is arranged on the moving frame (2).

15. The industrial vehicle for narrow roadways of claim 14, wherein: the steering wheel (16) is arranged on the main frame (11), the connecting port (52) is arranged on the lifting frame (5), the steering wheel (16) and the connecting port (52) are collinear in the vertical direction, the lifting sensor (61) and the steering wheel (16) are collinear in the horizontal direction, and a stay wire of the lifting sensor (61) passes through the steering wheel (16) to reach the connecting port (52).

16. The industrial vehicle for narrow roadways of claim 14, wherein: the movable frame (2) is provided with a bend wheel (21), the traversing sensor (62) and the bend wheel (21) are collinear in the vertical direction, and the position of the stay wire of the traversing sensor (62) connected to the lifting frame (5) is collinear in the horizontal direction with the bend wheel (21).