Motor-driven forward-moving type forklift portal frame parallel mechanism

Abstract

The utility model relates to a motor-driven forward-moving type forklift portal frame parallel mechanism which comprises a forklift body and a forklift portal frame arranged in front of the forklift body, supporting legs which are symmetrical left and right are arranged below the forklift body, and a semicircular cover shell used for placing a load wheel is arranged at the front end of each supporting leg close to the outer side. A guide rail and a gear rack are arranged on the opposite inner sides of the supporting legs, the gear rack is installed above the guide rail, and a forklift portal frame is installed on the guide rail and the gear rack and driven by a motor to move back and forth on the gear rack. The utility model has the advantages of simple and reasonable structure, stable operation, practicability and convenience, and can well shorten the length of the vehicle body and reduce the turning radius.

Description

Technical Field

[0001] This utility model belongs to the field of forklift parts technology, and relates to a motor-driven reach truck mast parallel mechanism. Background Technology

[0002] Reach trucks and driverless reach trucks, because their masts can move back and forth, combine the advantages of counterbalance forklifts and stackers, and have gained widespread market recognition.

[0003] Typically, existing reach truck masts are moved forward and backward by hydraulic cylinders. Since the cylinders have a fixed length, this increases the overall length of the truck body. Shortening this length usually requires complex structural layouts and hydraulic circuit arrangements, making installation and maintenance inconvenient. Furthermore, because it's hydraulically driven, there's generally some impact during start-up and shutdown, causing vibrations when the mast moves or the forklift is handling goods, affecting work efficiency. Moreover, existing forklift gears used to assist in mast lifting or traversing tend to accumulate dirt, metal shavings, and other debris after a period of use, easily leading to jamming and other problems. In severe cases, this can damage the gears, affecting the overall operation of the forklift and reducing work efficiency.

[0004] To address this issue, a motor-driven parallel mechanism for a reach truck mast is designed to overcome the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a motor-driven reach truck mast parallel mechanism that is simple and reasonable in structure, practical and convenient, and stable in operation.

[0006] This utility model is achieved through the following technical solution: a motor-driven reach truck mast parallel mechanism, which includes a forklift body and a forklift mast disposed in front of the body. Symmetrical support legs are provided on the lower part of the forklift body. A semi-circular cover for placing the load wheel is provided on the outer side of the front end of the support legs. A guide rail and a gear rack are provided on the inner side of the support legs. The gear rack is installed above the guide rail. The forklift mast is mounted on the guide rail and the gear rack. The forklift mast is driven by a motor to move back and forth on the gear rack.

[0007] Preferably, the forklift mast consists of a vertically arranged telescopic mast assembly and outer mast side plates located on both sides of the bottom of the telescopic mast assembly. The outer mast side plates have an L-shaped structure. A lower mast connecting plate is installed between the outer mast side plates. The lower mast connecting plate is arranged perpendicularly to the telescopic mast assembly. A motor is placed and fixedly installed on the lower mast connecting plate.

[0008] Preferably, the motor is fixed at its bottom to the lower gantry connecting plate, with one side of the motor closely attached to and fixed to the telescopic gantry assembly. The shaft end is installed in a motor mounting hole on the outer gantry side plate. The mounting hole is recessed to embed and fix the motor mounting plate. The motor mounting plate has a shaft hole in the middle, positioning holes around the shaft hole, and mounting holes around the positioning holes. A protruding mounting strip is provided on one side of the mounting plate, and vertical bolt holes are provided on the mounting strip. The motor mounting plate is fixed in the motor mounting hole through the mounting holes and the vertical bolt holes. A motor gear is installed at the motor shaft end. The motor gear is mounted on a gear rack and is driven by the motor to move back and forth.

[0009] Preferably, a brush block is also installed on the side of the motor mounting plate away from the motor mounting hole by bolts. The length of the brush block is the same as that of the motor mounting plate. A semi-circular through hole is opened in the middle for placing the motor gear. Screw holes are opened on both sides of the semi-circular through hole. The brush block is tightly fixed to one side of the motor mounting plate by bolts. Brush heads are detachably installed at both ends of the brush block by bolts.

[0010] Preferably, composite pulleys are installed at both ends of the outer gantry side plate. The composite pulleys are placed in the guide rail and driven by a motor to move back and forth on the gear rack, so that the composite pulleys move back and forth in the guide rail. A limit mechanism is installed at at least one end of the guide rail.

[0011] Preferably, the limiting mechanism is a limiting block, which is installed on the inner side of the front end of the guide rail or below the guide rail. When the limiting block is installed on the inner side of the guide rail, it limits the composite roller and prevents it from falling out. When the limiting block is installed below the guide rail, it limits the outer gantry side plate and prevents it from falling out.

[0012] Preferably, a polyurethane buffer block is provided between the vertical bolt hole and the bolt, which serves to reduce shock when the forklift mast moves.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1) The motor-driven reach truck mast parallel mechanism designed in this utility model uses a brush head to clean dirt, iron filings and other materials on the gear rack, preventing gear jamming and damage, and extending service life.

[0015] 2) The limiting block designed in this utility model is fixedly installed in the left and right guide rails or below the guide rails by screws. When the gantry moves forward to the top, the inner side plate will be stuck in this limiting block as a mechanical hard limit to prevent the gantry from falling off.

[0016] 3) This utility model has a polyurethane buffer block between the vertical bolt hole and the bolt. The buffer block can reduce shock when the forklift mast moves, and can also buffer the vibration caused by the forward movement of the mast when the gear slides, making the vehicle body more stable when picking up and dropping goods. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 Enlarged view of point A.

[0019] Figure 3 This is a diagram showing the overall working and usage state of this utility model. Detailed Implementation

[0020] To enable those skilled in the art to more clearly understand the purpose, technical solution and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] The present invention will now be described in detail with reference to the accompanying drawings: Figure 1-2 As shown, a motor-driven reach truck mast parallel mechanism includes a forklift body 1 and a forklift mast 2 located in front of the body. The forklift body 1 has symmetrical support legs 3 on its lower side. A semi-circular cover 4 for placing the load wheel 3 is located on the outer side of the front end of the support legs 3. A guide rail 5 and a gear rack 6 are arranged on the inner side of the support legs 3. The gear rack 6 is installed above the guide rail 5. The forklift mast 2 is mounted on the guide rail 5 and the gear rack 6. The forklift mast 2 is driven by a motor 10 to move back and forth on the gear rack 6.

[0023] The forklift mast 2 consists of a vertically arranged telescopic mast assembly 7 and outer mast side plates 8 located on both sides of the bottom of the telescopic mast assembly 7. The outer mast side plates 8 have a side L-shaped structure. A lower mast connecting plate 9 is installed between the outer mast side plates 8. The lower mast connecting plate 9 is arranged perpendicularly to the telescopic mast assembly 7. A motor 10 is placed and fixedly installed on the lower mast connecting plate 9.

[0024] The motor 10 is fixed at its bottom to the lower gantry connecting plate 9, and one side is tightly attached to and fixed to the telescopic gantry assembly 7. The shaft end 11 is installed in a motor mounting hole 12 on the outer gantry side plate 8. The mounting hole is recessed to embed and fix a motor mounting plate 13. The motor mounting plate 13 has a shaft hole 14 in the middle, positioning holes 15 around the shaft hole 14, and mounting holes 16 around the positioning holes 15. A protruding mounting strip 17 is provided on one side of the mounting plate, with vertical bolt holes 18 on the mounting strip 17. The motor mounting plate 13 is fixed in the motor mounting hole 12 through the mounting holes 16 and the vertical bolt holes 18. A motor gear 19 is installed on the motor shaft end 11, and the motor gear 19 is mounted on a gear rack 6 and driven by the motor 10 to move back and forth. The motor gear of this utility model is a GK16 motor gear.

[0025] The motor of this utility model is a BKO 750W servo steering motor, and it is equipped with an integrated two-stage transmission reduction gearbox. The motor and reduction gearbox are used for the forward movement of the forklift mast and the entire fork assembly.

[0026] A brush block 20 is bolted to the side of the motor mounting plate 13 away from the motor mounting hole 12. The brush block 20 has the same length as the motor mounting plate 13, and a semi-circular through hole 21 in the middle for placing the motor gear 19. Screw holes 22 are provided on both sides of the semi-circular hole, and it is bolted to one side of the motor mounting plate 13. Brush heads 23 are detachably mounted to both ends of the brush block 20 via bolts. The brush heads of this invention can be short-bristled brushes, used to clean dirt, metal shavings, etc., from the gear rack, preventing gear jamming and damage, and extending service life.

[0027] The outer gantry side plate 8 is equipped with composite pulleys 24 at both ends. The composite pulleys 24 are placed in the guide rail 5. The motor 10 drives the motor gear 19 to move back and forth on the gear rack 6, so that the composite pulleys 24 move back and forth in the guide rail 5. A limit mechanism is installed at at least one end of the guide rail 5.

[0028] The limiting mechanism is a limiting block 25, which is installed on the inner side of the front end of the guide rail 5 or below the guide rail. When the limiting block 25 is installed on the inner side of the guide rail 5, it limits the composite roller to prevent it from falling out. When the limiting block 25 is installed below the guide rail 5, it limits the outer gantry side plate 8 to prevent it from falling out.

[0029] The limiting block designed in this utility model is fixedly installed in or below the left and right guide rails by screws. When the gantry moves forward to the top, the inner side plate will be stuck in the limiting block as a mechanical hard limit to prevent the gantry from falling off.

[0030] A polyurethane buffer block 26 is also provided between the vertical bolt hole 18 and the bolt 27. The buffer block plays a shock-absorbing role when the forklift mast 2 moves, which can make the mast system vibrate in the vertical direction and prevent dirt, iron filings and other debris encountered during operation from falling onto the outrigger gear rack, causing wear on the motor gear and the left and right outrigger gear racks during movement.

[0031] The bolts in this utility model are generally hexagonal cylindrical head bolts, and the size can be M5x20mm or M6x12mm, etc., depending on actual needs. For ease of understanding, the following is provided: Figure 3 This is a diagram showing the overall working and usage state of this utility model.

[0032] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A motor-driven, forward-moving, fork-lift truck portal parallel mechanism comprising a truck body and a truck portal disposed forward of the body, characterized by: The forklift body has symmetrical support legs on the bottom. A semi-circular cover for placing the load wheel is provided on the outer front end of the support legs. A guide rail and a gear rack are provided on the inner side of the support legs. The gear rack is installed above the guide rail. The forklift mast is installed on the guide rail and the gear rack. The forklift mast is driven by a motor to move back and forth on the gear rack.

2. The motor-driven, forward-moving, fork truck gantry parallel mechanism of claim 1, wherein: The forklift mast consists of a vertically arranged telescopic mast assembly and outer mast side plates located on both sides of the bottom of the telescopic mast assembly. The outer mast side plates have an L-shaped structure. A lower mast connecting plate is installed between the outer mast side plates. The lower mast connecting plate is arranged perpendicularly to the telescopic mast assembly. A motor is placed and fixedly installed on the lower mast connecting plate.

3. The motor-driven, forward-moving, fork truck gantry parallel mechanism of claim 2, wherein: The bottom of the motor is fixed to the lower gantry connecting plate, and one side of the motor is tightly attached to and fixed to the telescopic gantry assembly. The shaft end is installed in the motor mounting hole opened on the outer gantry side plate. The mounting hole is recessed to embed and fix the motor mounting plate. The motor mounting plate has a shaft hole in the middle, and positioning holes are provided around the shaft hole. Mounting holes are provided around the positioning holes. A protruding mounting strip is provided on one side of the mounting plate. Vertical bolt holes are provided on the mounting strip. The motor mounting plate is fixed in the motor mounting hole through the mounting holes and the vertical bolt holes. A motor gear is installed at the motor shaft end. The motor gear is installed on the gear rack and is driven by the motor to move back and forth.

4. The motor-driven, forward-moving, fork truck gantry parallel mechanism of claim 3, wherein: A brush block is also bolted to the side of the motor mounting plate away from the motor mounting hole. The length of the brush block is the same as that of the motor mounting plate. A semi-circular through hole is opened in the middle for placing the motor gear. Screw holes are opened on both sides of the semi-circular hole. The brush block is fixed to one side of the motor mounting plate by bolts. Brush heads are detachably installed at both ends of the brush block by bolts.

5. The motor-driven, forward-moving, fork truck gantry parallel mechanism of claim 3, wherein: The outer gantry side plate is equipped with composite pulleys at both ends. The composite pulleys are placed in the guide rail. The motor drives the motor gear to move back and forth on the gear rack, so that the composite pulleys move back and forth in the guide rail. A limit mechanism is installed at at least one end of the guide rail.

6. The motor-driven, forward-moving, fork truck gantry parallel mechanism of claim 5, wherein: The limiting mechanism is a limiting block, which is installed on the inner front end of the guide rail or below the guide rail. When the limiting block is installed on the inner side of the guide rail, it limits the composite roller and prevents it from falling out. When the limiting block is installed below the guide rail, it limits the outer gantry side plate and prevents it from falling out.

7. The motor-driven, forward-moving fork truck gantry parallel mechanism of claim 3, wherein: A polyurethane buffer block is also provided between the vertical bolt holes and the bolts. This buffer block plays a role in shock absorption when the forklift mast moves.

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