Forklift applicable to narrow roadway

Abstract

The utility model relates to the technical field of forklifts, and particularly discloses a forklift applicable to a narrow roadway, which comprises a traveling mechanism, a portal frame mechanism and a supporting mechanism, the traveling mechanism comprises a chassis and a driving wheel set, the driving wheel set is positioned below the chassis and is used for driving the chassis to rotate, the portal frame mechanism comprises a portal frame, a mounting frame and a pallet fork, the bottom end of the portal is movably fixed to the chassis and can move in the horizontal direction, the pallet fork is connected with the portal in a liftable mode through a mounting frame, the supporting mechanism comprises a supporting sliding plate, the supporting sliding plate is movably arranged on the chassis and used for supporting the pallet fork, and when the pallet fork moves in the horizontal direction, the supporting sliding plate can move along with the pallet fork, and the pallet fork can move along with the supporting sliding plate. When the pallet fork moves forwards, the supporting point can also move forwards, the forklift is prevented from tipping due to the fact that the gravity center moves forwards, the overall stability is guaranteed, turning with a small turning radius can be achieved through rotation of the chassis, and steering and turning around are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a forklift suitable for narrow lanes. Background Art

[0002] A forklift is a commonly used cargo handling vehicle. Due to its excellent short-distance handling performance, it is widely used in stations, factories, logistics stations and other places. Most of these places are relatively spacious, so conventional forklifts are relatively large and have a relatively large turning radius. However, the modern warehousing industry is increasingly pursuing dense storage. The smaller the spacing, the greater the storage capacity of the entire warehouse. Therefore, forklifts operating in narrow aisles need to maintain a smaller body, so forklifts specifically suitable for narrow aisles have emerged.

[0003] Existing forklifts suitable for narrow aisles have the following disadvantages:

[0004] First, existing narrow aisle forklifts are designed with a narrow body to meet the requirements of passability, but they are usually unable to turn or make a U-turn. At most, they can achieve bidirectional movement through the drive wheels, but the reverse movement will block the line of sight, resulting in poor operating visibility;

[0005] Second, the lifting and lowering movement of the fork is interrelated with the horizontal movement. It is impossible to achieve the simultaneous lifting and horizontal movement of the fork, which is more inefficient;

[0006] 3. When the fork is moved horizontally to pick up the goods, its center of gravity changes, which can easily cause the forklift to tip over. Summary of the invention

[0007] The utility model is made in consideration of the above-mentioned problems. The purpose of the utility model is to provide a forklift suitable for narrow aisles, which can realize the self-rotation of the chassis, and then the horizontal angle of the fork can be adjusted at will to improve the forking range. At the same time, the fork position adjustment efficiency is high. In the process of the fork being extended horizontally, the support point can be moved forward to prevent the forklift from tipping over.

[0008] To achieve the above object, the utility model provides a forklift suitable for narrow lanes, comprising:

[0009] A walking mechanism, comprising a chassis and a driving wheel set, wherein the driving wheel set is located below the chassis and is used to drive the chassis to rotate, and the chassis is provided with a first guide groove arranged in a horizontal direction;

[0010] A gantry mechanism, comprising a gantry, a mounting frame and a fork, wherein the bottom end of the gantry is movably fixed in the first guide groove and can move horizontally along the first guide groove, the fork can be lifted and lowered to connect with the gantry through the mounting frame and can be located in the first guide groove, and the fork has a first preset position where it is retracted in the first guide groove and a second preset position where one end of the fork extends out of the first guide groove;

[0011] The supporting mechanism comprises a supporting slide plate, which is movably arranged at the bottom of the first guide groove and is used to provide support for the fork. When the fork moves from the first preset position to the second preset position, one end of the supporting slide plate can slide out of the first guide groove and be located directly below the fork.

[0012] According to the forklift suitable for narrow aisles described above, two first guide grooves are provided, and the two first guide grooves correspond to the two forks one by one. The two supporting slides are respectively located in the two first guide grooves, and one end of the supporting slide is connected to the front side of the bottom end of the door frame, and the bottom of the other end of the supporting slide is provided with a first supporting wheel to abut the ground.

[0013] According to the forklift suitable for narrow alleys described above, two connecting parts are provided at the bottom of the door frame, and the two connecting parts respectively extend into the two first guide grooves, and both sides of the first guide groove are provided with guide rails arranged along the length direction thereof, and both sides of the connecting part are provided with first guide wheels, and the first guide wheels are connected to the guide rails.

[0014] According to the forklift suitable for narrow lanes described above, a limit block is provided at the front end of the guide rail, and the limit block can abut against the first guide wheel to limit the forward movement of the door frame.

[0015] According to the forklift suitable for narrow aisles described above, it also includes a transverse drive mechanism, which includes a transverse motor, a drive sprocket and a transmission chain. The transverse motor is fixed to the door frame, and the drive sprocket is fixed on one side of the connecting part and connected to the output shaft of the transverse motor. The transmission chain is arranged on one side of the first guide groove and meshes with the drive sprocket.

[0016] The forklift suitable for narrow lanes described above further includes a lifting mechanism, which includes a lifting cylinder fixed to the door frame, and a piston rod of the lifting cylinder is connected to the mounting frame to drive the mounting frame to rise or fall.

[0017] According to the forklift suitable for narrow lanes described above, second guide grooves arranged in the vertical direction are provided on opposite sides of the mounting frame, and second guide wheels are provided on both inner sides of the door frame, and the second guide wheels are movably clamped in the second guide grooves.

[0018] According to the forklift suitable for narrow aisles described above, the driving wheel group includes two driving wheels and four auxiliary wheels, the four auxiliary wheels are located at the four corners of the chassis, the two driving wheels are located on two symmetrical sides of the middle of the chassis, and the four auxiliary wheels are all configured as universal wheels.

[0019] According to the forklift suitable for narrow lanes described above, the driving wheel group further includes a steering motor located at one side of the driving wheel, and the output shaft of the steering motor is connected to the driving wheel and is used to drive the steering motor to steer.

[0020] According to the forklift suitable for narrow aisles described above, the gantry mechanism also includes a contact plate and a trigger switch, the trigger switch is fixed on the mounting frame, and the contact plate is rotatably mounted on the front end of the mounting frame and is located directly above the tail end of the fork.

[0021] The utility model has the following beneficial effects:

[0022] 1. When the fork moves forward along the arrangement direction of the first guide groove, the support slide plate can slide out of the first guide groove and be located directly below the fork to provide support for the fork. When the fork moves forward, the support point can also move forward accordingly, which can effectively prevent the forklift from tipping over;

[0023] 2. The fork can be completely stored within the circumferential range of the chassis, which can reduce the overall width and length. At the same time, the chassis can be driven to rotate by the driving wheel set, so its turning radius is very small, which is suitable for turning in narrow aisles. The fork picking angle of the fork can be adjusted while turning, thereby increasing the fork picking range;

[0024] 3. The lifting and lowering movement and horizontal movement of the fork are independent of each other. When the gantry drives the fork to move horizontally, the fork can be lifted and lowered relative to the gantry, so that compound adjustment of the fork can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0026] Figure 2 2. It is a schematic diagram of the walking mechanism structure of an embodiment;

[0027] Figure 3 is a schematic diagram of assembling the lateral drive mechanism and the gantry mechanism of the embodiment;

[0028] Figure 4 It is a schematic diagram of the bottom structure of the walking mechanism of the embodiment.

[0029] In the figure:

[0030] 1. Traveling mechanism; 11. Chassis; 111. First guide groove; 111a. Guide rail; 111b. Limit block; 12. Driving wheel set; 121. Driving wheel; 122. Auxiliary wheel; 123. Steering motor;

[0031] 2. gantry mechanism; 21. gantry; 211. connecting part; 211a. first guide wheel; 212. second guide wheel; 22. mounting frame; 221. second guide groove; 23. fork; 24. contact plate; 25. trigger switch;

[0032] 3. Support mechanism; 31. Support slide plate; 311. Support wheel;

[0033] 4. Transverse drive mechanism; 41. Transverse motor; 42. Drive sprocket; 43. Transmission chain;

[0034] 5. Lifting mechanism; 51. Lifting cylinder. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] like Figure 1-4 As shown, a forklift suitable for narrow lanes includes a traveling mechanism 1, a gantry mechanism 2 and a supporting mechanism 3. The traveling mechanism 1 includes a chassis 11 and a driving wheel set 12. The driving wheel set 12 is located below the chassis 11 and is used to drive the chassis 11 to rotate. The gantry mechanism 2 includes a gantry 21, a mounting frame 22 and a fork 23. The bottom end of the gantry 21 is movably fixed on the chassis 11 and can move in the horizontal direction. The fork 23 can be raised and lowered to connect with the gantry 21 through the mounting frame 22. The supporting mechanism 3 The mechanism 3 includes a supporting slide 31, which is movably arranged on the chassis 11 and is used to provide support for the fork 23. When the fork 23 moves in the horizontal direction, the supporting slide 31 can move with the fork 23 and is always located directly below the fork 23. When the fork 23 moves forward, the supporting point can also move forward to prevent the forklift from tipping over due to the forward movement of the center of gravity, thereby ensuring the overall stability. Moreover, the rotation of the chassis 11 can achieve a turning with a small turning radius, which is conducive to steering and turning around.

[0037] Specifically, a first guide groove 111 arranged in the horizontal direction is provided on the chassis 11, and the bottom end of the door frame 21 is movably fixed in the first guide groove 111 and can move horizontally along the first guide groove 111, and the supporting slide plate 31 is movably arranged at the bottom of the first guide groove 111, and the fork 23 can be lowered into the first guide groove 111 by descending, and can abut against the top of the supporting slide plate 31 to achieve the supporting effect of the supporting slide plate 31 on the fork 23, and when the fork 23 is lowered to fit with the supporting slide plate 31, it has a first preset position and a second preset position along the arrangement direction of the first guide groove 111, that is, the horizontal movement of the door frame 21 along the first guide groove 111 will drive the fork 23 to move horizontally, and then fork the goods, and when the fork 23 moves from the first preset position to the second position, the supporting slide plate 31 can move together with the fork 23, that is, the supporting point moves together with the fork 23, thereby providing support for the fork 23, and preventing the forklift from tipping over due to the offset of the center of gravity.

[0038] In this embodiment, the first preset position refers to the position where the fork 23 is retracted in the first guide groove 111, and the second preset position refers to the position where one end of the fork 23 extends outward from the first guide groove 111. At the same time, the arrangement direction of the first guide groove 111 is consistent with the front-rear direction of the forklift. When the fork 23 moves from the first preset position to the second preset position, the fork 23 moves forward to fork the goods. If the forklift picks up the goods, the center of gravity of the forklift as a whole also moves forward, which is prone to tipping. At this time, the support slide 31 is needed to provide support for it.

[0039] In order to meet the requirement of synchronous movement of the two forks 23, two first guide grooves 111 are provided, and the two first guide grooves 111 correspond to the two forks 23 one by one. The two supporting slides 31 are respectively located in the two first guide grooves 111, and respectively support the two forks 23. At the same time, one end of the supporting slide 31 is connected to the front side of the bottom end of the door frame 21, and the bottom of the other end of the supporting slide 31 is provided with a first supporting wheel 311 which abuts against the ground. When the door frame 21 moves and drives the forks 23 to move horizontally, it will synchronously drive the supporting slide 31 to move, thereby ensuring that the relative positions of the forks 23 and the supporting slide 31 in the horizontal direction are consistent, thereby providing better support for the forks 23.

[0040] In order to ensure the stability of the movement of the gantry 21, two connecting parts 211 are provided at the bottom of the gantry 21, and the two connecting parts 211 extend into the two first guide grooves 111 respectively. The two connecting parts 211 have better double-point connection stability. Both sides of the first guide groove 111 are provided with guide rails 111a arranged along the length direction thereof, and both sides of the connecting part 211 are provided with first guide wheels 211a, and the first guide wheels 211a are connected to the guide rails 111a. The first guide wheels 211a are used to perform rolling connection with the guide rails 111a to reduce friction and facilitate the movement of the gantry 21.

[0041] In order to prevent the gantry 21 from escaping from the first guide groove 111 of the chassis 11, a limit block 111b is provided at the front end of the guide rail 111a, and the limit block 111b can abut against the first guide wheel 211a to limit the forward movement of the gantry 21. That is, the gantry 21 cannot continue to move forward at this time. At this time, the fork 23 and the gantry 21 have reached the forwardmost position.

[0042] In order to drive the gantry 21 to move in the front and rear directions, it also includes a transverse driving mechanism 4, which includes a transverse motor 41, a driving sprocket 42 and a transmission chain 43. The transverse motor 41 is fixed on the gantry 21, and the driving sprocket 42 is fixed on one side of the connecting portion 211 and connected to the output shaft of the transverse motor 41. The transmission chain 43 is arranged on one side of the first guide groove 111 and meshes with the driving sprocket 42. When the transverse motor 41 is working, it drives the driving sprocket 42 to rotate. Since the driving sprocket 42 is meshed with the transmission chain 43, it will drive itself to move along the arrangement direction of the transmission chain 43, thereby driving the gantry 21 to move.

[0043] In order to drive the mounting frame 22 to lift, a lifting mechanism 5 is also included. The lifting mechanism 5 includes a lifting cylinder 51 fixed on the gantry 21. The piston rod of the lifting cylinder 51 is connected to the mounting frame 22 to drive the mounting frame 22 to rise or fall, and then the mounting frame 22 drives the fork 23 to lift. During the lifting process of the mounting frame 22, in order to guide the mounting frame 22, second guide grooves 221 arranged in the vertical direction are provided on the opposite sides of the mounting frame 22, and second guide wheels 212 are provided on the two inner sides of the gantry 21. The second guide wheels 212 are movably clamped in the second guide grooves 221, and the second guide grooves 221 and the second guide wheels 212 are used to guide the mounting frame 22.

[0044] In order to realize the self-rotation of the chassis 11, the driving wheel group 12 includes two driving wheels 121 and four auxiliary wheels 122. The four auxiliary wheels 122 are located at the four corners of the chassis 11, and the two driving wheels 121 are located on both sides symmetrically in the middle of the chassis 11. The four auxiliary wheels 122 are all set as universal wheels, and a steering motor 123 is provided on one side of the driving wheel 121. The output shaft of the steering motor 123 is connected to the driving wheel 121 to drive the steering motor 123 to steer. When the two driving wheels 121 rotate synchronously, the four auxiliary wheels 122 can be driven to rotate together, thereby realizing the steering of the chassis 11 in situ.

[0045] In order to monitor the position of the forked goods, the gantry mechanism 2 also includes a contact plate 24 and a trigger switch 25. The trigger switch 25 is fixed on the mounting frame 22. The contact plate 24 is rotatably mounted on the front end of the mounting frame 22 and is located directly above the tail end of the fork 23. If the goods move to the tail end of the fork 23, they will abut against the contact plate 24, so that the contact plate 24 contacts the trigger switch 25, and then it is determined that the goods are in place.

[0046] The technical solution of the utility model is described in detail above in conjunction with the accompanying drawings, and the described embodiments are used to help understand the idea of ​​the utility model. The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the described specific embodiments or replace them in a similar manner, but this will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

[0047] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A forklift suitable for narrow lanes, characterized in that: include: A walking mechanism, comprising a chassis and a driving wheel set, wherein the driving wheel set is located below the chassis and is used to drive the chassis to rotate, and the chassis is provided with a first guide groove arranged in a horizontal direction; A gantry mechanism, comprising a gantry, a mounting frame and a fork, wherein the bottom end of the gantry is movably fixed in the first guide groove and can move horizontally along the first guide groove, the fork can be lifted and lowered to connect with the gantry through the mounting frame and can be located in the first guide groove, and the fork has a first preset position where it is retracted in the first guide groove and a second preset position where one end of the fork extends out of the first guide groove; The supporting mechanism comprises a supporting slide plate, which is movably arranged at the bottom of the first guide groove and is used to provide support for the fork. When the fork moves from the first preset position to the second preset position, one end of the supporting slide plate can slide out of the first guide groove and be located directly below the fork.

2. A forklift suitable for narrow aisles according to claim 1, characterized in that: There are two first guide grooves, and the two first guide grooves correspond to the two forks one by one. The two supporting slides are respectively located in the two first guide grooves, and one end of the supporting slide is connected to the front side of the bottom end of the door frame, and the bottom of the other end of the supporting slide is provided with a first supporting wheel to abut the ground.

3. A forklift suitable for narrow aisles according to claim 2, characterized in that: Two connecting parts are provided at the bottom of the door frame, and the two connecting parts extend into the two first guide grooves respectively. Both sides of the first guide groove are provided with guide rails arranged along the length direction thereof, and both sides of the connecting parts are provided with first guide wheels, and the first guide wheels are connected to the guide rails.

4. A forklift suitable for narrow aisles according to claim 3, characterized in that: A limit block is provided at the front end of the guide rail, and the limit block can abut against the first guide wheel to limit the forward movement of the door frame.

5. A forklift suitable for narrow aisles according to claim 3, characterized in that: It also includes a transverse driving mechanism, which includes a transverse motor, a driving sprocket and a transmission chain. The transverse motor is fixed on the door frame, the driving sprocket is fixed on one side of the connecting part and connected to the output shaft of the transverse motor, and the transmission chain is arranged on one side of the first guide groove and meshes with the driving sprocket.

6. A forklift suitable for narrow aisles according to claim 1, characterized in that: It also includes a lifting mechanism, which includes a lifting cylinder fixed on the door frame, and a piston rod of the lifting cylinder is connected to the mounting frame to drive the mounting frame to rise or fall.

7. A forklift suitable for narrow aisles according to claim 6, characterized in that: Second guide grooves arranged in the vertical direction are provided on both opposite sides of the mounting frame, and second guide wheels are provided on both inner sides of the door frame. The second guide wheels are movably clamped in the second guide grooves.

8. The forklift suitable for narrow aisles according to claim 1, characterized in that: The driving wheel set includes two driving wheels and four auxiliary wheels. The four auxiliary wheels are located at the four corners of the chassis, and the two driving wheels are located on two symmetrical sides of the middle of the chassis. The four auxiliary wheels are all configured as universal wheels.

9. A forklift suitable for narrow aisles according to claim 8, characterized in that: The driving wheel assembly further comprises a steering motor located at one side of the driving wheel, wherein an output shaft of the steering motor is connected to the driving wheel and is used to drive the steering motor to steer.

10. A forklift suitable for narrow aisles according to claim 1, characterized in that: The gantry mechanism also includes a contact plate and a trigger switch, wherein the trigger switch is fixed on the mounting frame, and the contact plate is rotatably mounted on the front end of the mounting frame and is located directly above the tail end of the fork.

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