Double-stroke forklift
By designing the gantry structure and guide column pressure sensor system of the dual-stroke forklift, the problems of forklift difficulty in operating in a narrow space and the easy collision of forks is solved, and more efficient and safe cargo handling is achieved.
Patent Information
- Application Number
- CN202420854125.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-04-23
AI Technical Summary
Existing forklifts are difficult to operate in a narrow space, and the forks are prone to collide with the goods, resulting in damage to the goods.
A dual-stroke forklift is designed, with the gantry having a dual-stroke structure. It can not only drive the inner gantry and the forklift through the hydraulic cylinder of the outer gantry, but also drive the forklift up and down through the hydraulic cylinder at the bottom of the inner gantry. At the same time, guide columns and pressure sensors are provided on both sides of the fork. When the fork and the goods are about to collide, the pressure sensor will issue an alarm to remind the driver to avoid collision.
It realizes flexible operation of forklifts in a narrow space, avoids collision between forks and goods, improves loading and unloading efficiency and reduces the risk of cargo damage.
Smart Images
Figure CN222877570U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of forklift equipment, in particular to a double-stroke forklift. Background Art
[0002] A forklift is a material handling machine that can effectively combine horizontal transportation and vertical lifting. It uses a gantry and forks as working devices. It can load and unload goods and stack them in pieces. It can also be used for loading and unloading special items and bulk materials. The forklift consists of three main parts: a power unit, a wheeled chassis, and a working device. The working device includes a gantry, a chain, a fork frame, a fork, and a hydraulic cylinder. The gantry consists of an outer gantry and an inner gantry that can be lifted up and down inside the outer gantry. The fork frame is fixedly connected to the inner gantry. Through the drive of the hydraulic cylinder and the coordination of the chain, the inner gantry is lifted up and down inside the outer gantry, thereby driving the fork frame and the fork to move up and down.
[0003] However, it is difficult for forklifts to operate in some narrow spaces, such as in the compartment of a truck. When the forks of the forklift lift the goods, the height of the inner mast will increase, causing the top of the inner mast to exceed the height of the cargo box, resulting in the forklift being unable to transport the goods into the compartment of the truck. Manual transportation is still required, and the loading and unloading efficiency is low. In addition, existing forklifts are prone to collision with goods or obstacles when transporting goods in a narrow space. In particular, when the forks are loaded with goods, the forklift driver may misjudge the distance due to limited vision, causing the fork tip to collide with the goods, causing damage to the goods.
[0004] In view of this, the inventor conducted in-depth research on the above-mentioned issues, which led to the creation of this case. Utility Model Content
[0005] The utility model provides a double-stroke forklift, aiming to solve the problems that the existing forklift is difficult to operate in a narrow space and the cargo fork is easy to collide with the cargo and cause damage to the cargo.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A double-stroke forklift comprises a mast arranged at the front part of the forklift body, the mast comprises an outer mast arranged vertically and an inner mast arranged inside the outer mast so as to be movably arranged up and down, a fork frame is arranged inside the inner mast, a sliding mechanism is fixedly arranged on the side of the fork frame facing the inner mast, a driving mechanism for driving the sliding mechanism to move up and down in the inner mast is vertically arranged at the bottom of the inner mast; a fork is arranged on the side of the fork frame facing away from the inner mast, guide posts parallel to the fork are fixedly arranged on the two outer side surfaces of the fork, with the end of the fork having a fork tip as the left and the other end as the right. The guide post is on the right, a fork tip is extended from the left end of the guide post, and a twist cover is provided at the end of the left end of the guide post, a guide block is fixedly provided inside the guide post, a guide rod is movably inserted in the guide block, the left end of the guide rod passes through the guide block and is provided with a fixed block, a first spring is provided between the left end face of the fixed block and the twist cover, a second spring is provided between the right end face of the fixed block and the guide block, a pressure sensor for sensing the pressure of the guide rod is provided at the right end of the guide post, and the pressure sensor can output the sensed signals to the alarm and strobe light arranged on the top and front side of the forklift body respectively.
[0008] Furthermore, both sides of the left end of the guide column are concavely provided with limiting grooves, and both sides of the twist cover are convexly provided with limiting blocks for being inserted into the limiting grooves.
[0009] Furthermore, two inner side surfaces of the outer mast are recessed with first guide grooves, and two outer side surfaces of the inner mast facing the outer mast are provided with first pulleys for moving in the first guide grooves; first hydraulic cylinders are fixedly arranged vertically on both sides of the outer mast, and the output shaft of the first hydraulic cylinder is fixedly connected to the inner top of the inner mast.
[0010] Furthermore, the two inner side surfaces of the inner door frame are recessed with second guide grooves; the sliding mechanism includes two wing plates which are vertically arranged and spaced apart, the wing plates are parallel to the inner door frame, and a second pulley for moving in the second guide groove is provided on one side of the wing plate facing the inner door frame.
[0011] Furthermore, the driving mechanism includes a second hydraulic cylinder arranged at the bottom of the inner mast, a mounting seat fixedly connected to the output shaft of the second hydraulic cylinder, sprockets arranged on both sides of the mounting seat, and a chain installed on the sprockets. A mounting plate is fixedly provided at the middle of the second hydraulic cylinder, one end of the chain is fixedly connected to the mounting plate, and the other end is fixedly connected to the bottom of the fork frame.
[0012] Furthermore, the pressure sensor is a contact pressure sensor.
[0013] Furthermore, the top ends of the outer mast and the inner mast are flush with the top end of the forklift overhead guard.
[0014] From the above description of the structure of the utility model, it can be seen that the utility model has the following advantages:
[0015] The mast of the forklift of the utility model is a double-stroke one, which can not only drive the inner mast and the fork frame to transport goods through the first hydraulic cylinder of the outer mast, but also drive the fork frame to move up and down through the second hydraulic cylinder arranged at the bottom of the inner mast, so that the forklift can be used in two different environments, wide site or narrow site, and guide posts are arranged on both sides of the fork of the truck, the fork tip extends from the left end of the guide post, and a twist cover which retracts when subjected to pressure is arranged at the left end of the guide post. A guide rod is also provided inside the guide column. The left end of the guide rod is connected to the twist cover, and the right end is provided with a pressure sensor. When the twist cover of the guide column collides with the cargo, it will retract, thereby driving the guide rod to move inside the guide column, so that the right end of the guide rod contacts the pressure sensor. When the pressure sensor senses the pressure, it will output a signal to the alarm arranged on the top of the forklift body and the strobe light arranged on the front side of the forklift body, so that the alarm and the strobe light emit an alarm sound and a prompt light, thereby reminding the forklift driver before the fork tip collides with the cargo, thereby preventing the fork from colliding with the transported cargo and causing damage to the cargo. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0017] Figure 2 It is a structural schematic diagram of the inner door frame and the outer door frame of the utility model.
[0018] Figure 3 It is a structural schematic diagram of the outer door frame of the utility model.
[0019] Figure 4 The utility model is a schematic structural diagram of a fork frame installed on an inner door frame.
[0020] Figure 5 It is a schematic diagram of the structure inside the guide column of the utility model.
[0021] Figure 6 It is a structural schematic diagram of the driving mechanism of the utility model.
[0022] Figure 7 This is a structural schematic diagram of the utility model in which the second pulley is installed in the second guide groove.
[0023] Figure numerals: 10-forklift body; 101-forklift overhead guard; 20-gantry; 21-outer gantry; 211-first guide groove; 212-first hydraulic cylinder; 22-inner gantry; 221-first pulley; 222-second guide groove; 223-wing plate; 224-second pulley; 225-second hydraulic cylinder; 2251-mounting plate; 226-mounting seat; 2261-sprocket; 2262-chain; 30-fork frame; 40-fork; 50-guide column; 501-limiting groove; 51-twist cover; 511-limiting block; 52-guide block; 53-guide rod; 54-fixing block; 55-first spring; 56-second spring; 60-pressure sensor; 70-alarm; 80-strobe light. DETAILED DESCRIPTION
[0024] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.
[0025] Reference Figures 1 to 5 A double-stroke forklift includes a mast 20 arranged at the front of a forklift body 10, the mast 20 includes an outer mast 21 arranged upright and an inner mast 22 arranged inside the outer mast 21 so as to be movably arranged up and down, a fork frame 30 is arranged inside the inner mast 22, and a sliding mechanism is fixedly provided on the side of the fork frame 30 facing the inner mast 22, a driving mechanism for driving the sliding mechanism to move up and down in the inner mast 22 is erected at the bottom of the inner mast 22; a fork 40 is provided on the side of the fork frame 30 facing away from the inner mast 22. Guide posts 50 parallel to the fork 40 are fixedly provided on the two outer side surfaces of the fork 40, with the end of the fork 40 having the fork tip being the left and the other end being the right. The left end of the guide post 50 extends out of the fork tip of the fork 40, and a twist cover 51 is provided at the end of the left end of the guide post 50. A guide block 52 is fixedly provided inside the guide post 50, and a guide rod 53 is movably inserted in the guide block 52, and the left end of the guide rod 53 passes through the guide block 52 and is provided with a fixed block 54. A first spring 55 is provided between the left end surface of the fixed block 54 and the twist cover 51, and a second spring 56 is provided between the right end surface of the fixed block 54 and the guide block 52. A pressure sensor 60 for sensing the pressure of the guide rod 53 is also provided at the right end of the guide post 50. The pressure sensor 60 can output the sensed signals to the alarm 70 and the strobe light 80 provided on the top and the front side of the forklift body 10, respectively, so as to warn the driver of the forklift to avoid the collision between the fork tip of the fork 40 and the cargo.
[0026] It should be noted here that, in the present embodiment, the guide column 50 is arranged on a side close to the fork tip of the fork 40, the pressure sensor 60 is a contact pressure sensor, and the pressure sensor 60 is electrically connected to the alarm 70 and the strobe light 80, so that the pressure sensor 60 can convert the pressure transmitted from the guide rod 53 into a signal and transmit it to the alarm 70 and the strobe light 80, so that the alarm 70 and the strobe light 80 start working.
[0027] Reference Figures 1 to 5 , limiting grooves 501 are recessed on both sides of the left end of the guide column 50, and the limiting grooves 501 are long strips. A groove is provided inside the above-mentioned twist cover 51, and limiting blocks 511 for snapping into the limiting grooves 501 are convexly provided on both sides of the twist cover 51. Through such a setting, the twist cover 51 can be restricted to prevent the twist cover 51 from falling off, and at the same time, it can also be ensured that the twist cover 51 has a certain range of movement. In order to ensure that the first spring 55 does not deviate when impacted by external force, spring positioning columns (not shown in the figure) can also be convexly provided on the side of the twist cover 51 facing the guide block 52 and the side of the guide block 52 facing the twist cover 51, so that the first spring 55 will not deviate during movement.
[0028] Reference Figure 1 and Figure 2 , the two inner side surfaces of the outer mast 21 are recessed with first guide grooves 211, and the two outer side surfaces of the inner mast 22 facing the outer mast 21 are both provided with first pulleys 221 for moving in the first guide grooves 211; and first hydraulic cylinders 212 arranged vertically are fixedly provided on both sides of the outer mast 21, and the output shaft of the first hydraulic cylinder 212 is fixedly connected to the inner top of the above-mentioned inner mast 22, so that when the first hydraulic cylinder 212 is lifted, it can drive the inner mast 22 to move up and down on the outer mast 21, so that it is suitable for operations with spacious space, and the top ends of the outer mast 21 and the inner mast 22 are flush with the top end of the overhead guard 101 of the forklift body 10, so that the improved forklift will not be unable to enter the cargo compartment of the truck due to the excessive height of the outer mast 21 and the inner mast 22.
[0029] Reference Figures 1 to 7, the two inner side surfaces of the inner door frame 22 are concavely provided with second guide grooves 222; the sliding mechanism includes two wing plates 223 arranged vertically and spaced apart, the wing plates 223 are parallel to the inner door frame 22, and the side of the wing plates 223 facing the inner door frame 22 is provided with a second pulley 224 for moving in the second guide groove 222; the driving mechanism includes a second hydraulic cylinder 225 set at the bottom of the inner door frame 22, a mounting seat 226 fixedly connected to the output shaft of the second hydraulic cylinder 225, sprocket wheels 2261 set on both sides of the mounting seat 226, and two chains 2262 respectively mounted on the two sprocket wheels 2261, the second hydraulic cylinder A mounting plate 2251 is fixedly provided in the middle of 225, and two studs are vertically provided on the mounting plate 2251. One end of the two chains 2262 is fixedly connected to the two studs on the mounting plate 2251, and the other end is fixedly connected to the bottom of the fork frame 30. When the second hydraulic cylinder 225 is lifted or retracted, the fork frame 30 also rises or falls accordingly under the drive of the chain 2262. In this way, when the forklift is operating in a small space, the goods can be transported without being driven by the inner mast 22, thereby avoiding the situation where the inner mast 22 is too high when raised and cannot enter the cargo compartment of the truck.
[0030] Reference Figures 1 to 7 The utility model sets the door frame 20 as a double-stroke structure, that is, not only can the first hydraulic cylinder 212 of the outer door frame 21 drive the inner door frame 22 and the fork frame 30 to transport goods, but also the second hydraulic cylinder 225 arranged at the bottom of the inner door frame 30 can drive the fork frame 30 to transport goods, so that the forklift can be used in two different environments, wide sites or narrow sites, and guide columns 50 are also arranged on both sides of the forklift fork 40, the fork tip of the fork 40 extends from the left end of the guide column 50, and the left end of the guide column 50 is provided with a twist cover 51 that retracts when subjected to pressure. A guide rod 53 is also provided inside the guide column 50. The left end of the guide rod 53 is connected to the twist cover 51, and the right end is provided with a pressure sensor 60. In this way, when the twist cover 51 of the guide column 50 collides with the cargo, it will retract, thereby driving the guide rod 53 to move inside the guide column 50, so that the right end of the guide rod 53 contacts the pressure sensor 60. When the pressure sensor 60 senses the pressure, it will output a signal to the alarm 70 set at the top of the forklift body 10 and the strobe light 80 set on the front side of the forklift body 10, so that the alarm 70 and the strobe light 80 emit an alarm sound and a prompt light, thereby being able to remind the forklift driver before the fork tip of the fork 40 collides with the cargo, thereby avoiding the collision of the fork 40 with the transported cargo and causing damage to the cargo.
[0031] The above is only a specific implementation method of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.
Claims
1. A two-stroke forklift, comprising a mast arranged at the front of a forklift body, characterized in that: The door frame includes an outer door frame arranged vertically and an inner door frame arranged inside the outer door frame so as to be slidable up and down. A fork frame is arranged inside the inner door frame. A sliding mechanism is fixedly arranged on the side of the fork frame facing the inner door frame. A driving mechanism for driving the sliding mechanism to move up and down in the inner door frame is erected at the bottom of the inner door frame. A fork is arranged on the side of the fork frame facing away from the inner door frame. Guide posts parallel to the fork are fixedly arranged on the two outer side surfaces of the fork. The end of the fork with the fork tip is the left end and the other end is the right end. The left end of the guide post extends The fork tip is extended, and a twist cover is provided at the end of the left end of the guide column, a guide block is fixedly provided inside the guide column, a guide rod is movably inserted in the guide block, the left end of the guide rod passes through the guide block and is provided with a fixed block, a first spring is provided between the left end face of the fixed block and the twist cover, a second spring is provided between the right end face of the fixed block and the guide block, a pressure sensor for sensing the pressure of the guide rod is provided at the right end of the guide column, and the pressure sensor can output the sensed signal to the alarm and strobe light arranged on the top and front side of the forklift body respectively.
2. The dual-stroke forklift according to claim 1, characterized in that: Limiting grooves are concavely arranged on both sides of the left end of the guide column, and limiting blocks for being inserted into the limiting grooves are convexly arranged on both sides of the twist cover.
3. The dual-stroke forklift according to claim 1, characterized in that: The two inner side surfaces of the outer mast are recessed with first guide grooves, and the two outer side surfaces of the inner mast facing the outer mast are both provided with first pulleys for moving in the first guide grooves; first hydraulic cylinders arranged vertically are fixedly provided on both sides of the outer mast, and the output shaft of the first hydraulic cylinder is fixedly connected to the inner top of the inner mast.
4. The dual-stroke forklift according to claim 1, characterized in that: The two inner side surfaces of the inner door frame are recessed with second guide grooves; the sliding mechanism includes two wing plates which are vertically arranged and spaced apart, the wing plates are parallel to the inner door frame, and a second pulley for moving in the second guide groove is provided on one side of the wing plates facing the inner door frame.
5. The dual-stroke forklift according to claim 1, characterized in that: The driving mechanism includes a second hydraulic cylinder set at the bottom of the inner mast, a mounting seat fixedly connected to the output shaft of the second hydraulic cylinder, sprockets set on both sides of the mounting seat and chains installed on the sprockets. A mounting plate is fixedly provided at the middle of the second hydraulic cylinder, one end of the chain is fixedly connected to the mounting plate, and the other end is fixedly connected to the bottom of the fork frame.
6. The dual-stroke forklift according to claim 1, characterized in that: The pressure sensor is a contact pressure sensor.
7. The dual-stroke forklift according to claim 1, characterized in that: The top ends of the outer door frame and the inner door frame are flush with the top end of the forklift overhead guard.