CN220056248U - Fork mechanism for truck-mounted forklift and truck-mounted forklift - Google Patents

Abstract

The utility model relates to a fork mechanism for a truck-mounted forklift and the truck-mounted forklift, and belongs to the technical field of forklifts. The fork mechanism comprises a fork frame, a bearing rail, a screw rod and a fork. The fork frame is fixedly arranged on the lifting frame of the forklift truck. The bearing rail is horizontally fixed in front of the fork frame. The screw rod is parallel to the bearing track and rotatably mounted in front of the fork. At least one sliding block is connected on the screw rod in a threaded sliding way. The fork is connected with the bearing rail in a sliding way. One of the fork and the slide block is provided with a hinge hole, the other is provided with or connected with a hinge shaft hinged with the hinge hole, and the cross section area of the hinge hole is larger than that of the hinge shaft. According to the fork mechanism, the fork and the sliding block are hinged through the hinge hole and the hinge shaft, and the sectional area of the hinge hole is larger than that of the hinge shaft, so that the sliding block is not rigidly connected with the fork, the weight of the fork and the goods is prevented from being transmitted to the screw rod, and the effects of improving the operation and use experience of the screw rod and prolonging the service life of the screw rod are achieved.

Description

Fork mechanism for truck-mounted forklift and truck-mounted forklift

Technical Field

The utility model relates to the technical field of forklifts, in particular to a fork mechanism for a truck-mounted forklift and the truck-mounted forklift.

Background

Truck-mounted forklifts are industrial lifting devices for carrying goods, and two forks are usually arranged in front of the truck-mounted forklift. In order to enable the truck-mounted forklift to carry large-size cargoes, the prior art proposes to directly arrange two forks on two screw rods with opposite rotation directions, and the increase of the distance between the two forks is achieved by rotating the screw rods. Because the load is great when the fork operation, when directly setting up the fork on the lead screw, lead screw atress deformation easily leads to.

Disclosure of Invention

In view of the above problems, the utility model provides a fork mechanism for a truck-mounted forklift, which at least partially solves the problems, and aims to solve the problem that a screw rod in the fork mechanism is easy to deform under stress in the prior art, and realize non-rigid connection of the screw rod and the fork, thereby achieving the effects of avoiding the deformation under stress of the screw rod, improving the use experience of the screw rod and prolonging the service life of the screw rod.

The utility model provides a further object, and provides a multipurpose lamp for a forklift truck, which solves the problem that a warning lamp is easy to be shielded in the prior art, and achieves the effect of reducing operation potential safety hazards.

Specifically, the utility model provides the following technical scheme:

a fork mechanism for a truck-mounted forklift comprises a fork frame, a bearing rail, a screw rod and a fork. The fork frame is fixedly arranged on the lifting frame of the truck-mounted forklift. The bearing rail is horizontally fixed in front of the fork frame. The screw rod is parallel to the bearing rail and rotatably installed in front of the fork frame. And the screw rod is in threaded sliding connection with at least one sliding block. The fork is connected with the bearing rail in a sliding way. One of the fork and the slide block is provided with a hinge hole, the other is provided with or connected with a hinge shaft hinged with the hinge hole, and the sectional area of the hinge hole is larger than that of the hinge shaft.

Optionally, the hinge hole is a waist-shaped hole extending vertically. The hinge shaft is a round shaft.

Optionally, the slider includes a first hinge plate disposed vertically. The fork comprises two second hinged plates which are vertically arranged and are arranged at left and right intervals. The first hinge plate is clamped between the two second hinge plates.

The hinge hole is parallel to the screw rod and penetrates through the first hinge plate and the second hinge plate.

Optionally, a distance between the two second hinge plates is greater than a sum of a thickness of the first hinge plate and 0.25 times of a lead of the screw.

Optionally, the screw rod includes a first screw rod and a second screw rod which are coaxially and fixedly connected, and the screw threads of the first screw rod and the second screw rod have opposite rotation directions.

The sliding blocks are two and are respectively connected with the first screw rod and the second screw rod in a threaded sliding manner. The two forks are hinged to the two sliding blocks respectively.

Optionally, the fork mechanism further includes a guide wheel, and the guide wheel is rotatably disposed at the lower end of the fork around a rotation shaft extending vertically, so that a wheel surface of the guide wheel abuts against the front surface of the fork frame.

Optionally, the bearing rail is round, and is arranged in front of the fork frame at intervals.

The fork is connected with the bearing rail in a sliding way through a circular pipe-shaped sliding sleeve. The length of the sliding sleeve along the axial direction is larger than 1.5 times of the inner diameter of the sliding sleeve.

On the other hand, the utility model also provides a truck-mounted forklift, which comprises a forklift frame, a lifting frame which is connected to the forklift frame in a sliding manner and the fork mechanism which is arranged on the lifting frame.

Optionally, the truck-mounted forklift further comprises a multi-purpose light comprising a light assembly and a gooseneck. The light assembly includes a warning light. One end of the gooseneck is fixedly connected to the truck-mounted forklift, and the other end of the gooseneck is fixedly connected with the lamp assembly.

The length of the gooseneck is not less than 0.5 meter.

Optionally, the lamp assembly further includes an illuminating lamp and a light shielding plate, the illuminating lamp is arranged at intervals with the warning lamp, and the light shielding plate is arranged at the rear side of the illuminating lamp.

Optionally, the lamp assembly further comprises a turn light, and the turn light is spaced from the warning light.

Optionally, the lamp assembly further includes an illuminating lamp, a light shielding plate and a steering lamp, wherein the illuminating lamp is arranged at intervals with the warning lamp, and the light shielding plate is arranged at the rear side of the illuminating lamp. The steering lamp and the warning lamp are arranged at intervals.

The first end of the gooseneck is fixedly connected to the rear of the forklift frame. The first end has a height from the ground of less than 1.5 meters.

Optionally, the fork mechanism further includes a hand wheel fixedly connected to one end of the screw rod, so that the screw rod rotates under the drive of the hand wheel.

The fork mechanism for the truck-mounted forklift is characterized in that a bearing rail is arranged on a fork frame, the fork is connected to the bearing rail in a sliding mode, and the weight of the fork and cargoes is borne by the bearing rail during operation of the truck-mounted forklift. At least one sliding block is connected to the screw rod in a sliding manner, the fork and the sliding block are hinged through a hinge hole and a hinge shaft, the sectional area of the hinge hole is larger than that of the hinge shaft, the sliding block can drive the fork to horizontally move, the fork is opened to convey large-size goods, the sliding block is provided with a gap with the fork in the vertical direction, the sliding block is not rigidly connected with the fork, the weight conduction of the fork and the goods is prevented from being conducted onto the screw rod, the screw rod formed by the sliding block is prevented from deforming, the sliding of the sliding block on the screw rod is prevented from being smooth, and even the screw rod is prevented from being damaged. The effects of improving the operation and use experience of the screw rod and prolonging the service life are achieved.

On the other hand, the truck-mounted forklift is provided with the multipurpose lamp, the multipurpose lamp is provided with the gooseneck with the length not smaller than 0.5 meter, and the warning lamp and/or the illuminating lamp are/is arranged at the tail end of the gooseneck. Because the gooseneck can be bent at will, the extension length, the position and the direction of the warning lamp and/or the lighting lamp relative to the truck-mounted forklift are changed, and when the truck-mounted forklift works, even if the size of goods is large, the warning lamp and the lighting lamp can extend out of the range of the goods, and the warning lamp and/or the lighting lamp can reach the periphery of the truck-mounted forklift and illuminate the position of the goods. The effects of reducing potential safety hazards in large-volume cargo operation and improving working efficiency are achieved.

The above, as well as additional objectives, advantages, and features of the present utility model will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present utility model when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the utility model will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 is a schematic block diagram of a fork mechanism according to one embodiment of the present utility model;

FIG. 2 is a schematic block diagram of a fork mechanism according to another embodiment of the present utility model;

FIG. 3 is a schematic enlarged view at A in FIG. 1;

FIG. 4 is a schematic block diagram of a truck-mounted forklift in accordance with one embodiment of the present utility model;

FIG. 5 is a schematic side view of a truck-mounted forklift in accordance with one embodiment of the present utility model;

FIG. 6 is a schematic top view of a truck-mounted forklift in accordance with one embodiment of the present utility model;

fig. 7 is a schematic top view of a truck-mounted forklift according to another embodiment of the present utility model.

Detailed Description

The following describes a fork mechanism and a truck-mounted forklift according to an embodiment of the present utility model with reference to fig. 1 to 7. In the description of the present embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature, i.e. one or more such features. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. When a feature "comprises or includes" a feature or some of its coverage, this indicates that other features are not excluded and may further include other features, unless expressly stated otherwise.

Unless specifically stated or limited otherwise, the terms "disposed," "mounted," "connected," "secured," "coupled," and the like should be construed broadly, as they may be connected, either permanently or removably, or integrally; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. Those of ordinary skill in the art will understand the specific meaning of the terms described above in the present utility model as the case may be.

Furthermore, in the description of the present embodiments, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature therebetween. That is, in the description of the present embodiment, the first feature being "above", "over" and "upper" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature "under", "beneath", or "under" a second feature may be a first feature directly under or diagonally under the second feature, or simply indicate that the first feature is less level than the second feature.

In the description of the present embodiment, a description referring to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Fig. 1 is a schematic block diagram of a fork mechanism according to one embodiment of the present utility model, and in combination with fig. 2-7, the present utility model provides a fork mechanism 1 for a truck-mounted forklift, comprising a fork carriage 11, a load bearing rail 12, a lead screw 13, and a fork 15. The fork 11 is fixedly arranged on the lifting frame 2 of the truck-mounted forklift. The load-bearing rail 12 is horizontally fixed in front of the fork 11. The screw 13 is parallel to the load bearing rail 12 and rotatably mounted in front of the fork 11. At least one slide block 14 is connected with the screw rod 13 in a threaded sliding manner. The forks 15 are slidably connected to the load bearing rails 12. One of the fork 15 and the slider 14 is formed with a hinge hole 16, and the other is formed with or connected with a hinge shaft 17 hinged to the hinge hole 16, and the cross-sectional area of the hinge hole 16 is larger than that of the hinge shaft 17.

In this embodiment, as shown in fig. 5, the fork carriage 11 is used to connect the fork 15 and the lift frame 2 of the truck-mounted forklift so that the fork 15 rises and falls with the lift frame 2. The fork 11 can be a vertically arranged support frame with a front surface, can be directly welded on the lifting frame 2, and can be detachably and fixedly connected on the lifting frame 2 by means of fasteners and the like. The load bearing rail 12 may be a round steel, a steel pipe, or a section bar with other shapes, and is used for supporting the fork 15 and goods on the fork 15, and the fork 15 can slide left and right on the load bearing rail 12. The screw rod 13 is parallel to the length direction of the bearing rail 12, the screw rod 13 is rotatably arranged on the fork 11, a certain gap is reserved between the screw rod 13 and the front of the fork 11, and enough space is reserved for the sliding block 14 to slide on the screw rod 13 in a threaded manner. The sliding block 14 can be in a sleeve shape or other shapes, a threaded through hole is formed in the sliding block 14 and matched with the screw rod 13, and when the screw rod 13 rotates, the sliding block 14 slides along the length direction of the screw rod 13. Of course, when the screw 13 is not rotated, the slider 14 can also be rotated to change the angle and position of the slider 14 relative to the screw 13.

The sliding block 14 is hinged with the fork 15 through the hinge hole 16 and the hinge shaft 17, and as the fork 15 is connected with the bearing rail 12 in a sliding way and the fork 15 is heavy, after the sliding block 14 is hinged with the fork 15, when the screw rod 13 rotates, the fork 15 can give the torque on the whole body of the sliding block 14, so that the sliding block 14 cannot rotate along with the screw rod 13, and the threaded sliding of the sliding block 14 is converted into the transverse movement of the sliding block 14. In this embodiment, the slider 14 and the fork 15 are both provided with a hinge hole 16, a hinge shaft 17 is inserted into the hinge hole 16, the hinge shaft 17 is also called a pin or a shaft pin, and one end of the hinge shaft 17 is a standard component and has a sealing head. In the present utility model, the sectional area of the hinge shaft 17 is expressed as the sectional area of the shaft portion of the hinge shaft 17, and the sectional area of the head of the hinge shaft 17 is larger than the sectional area of the hinge hole 16. The other end of the hinge shaft 17 may have a cotter hole to which a cotter pin is connected. Because the sectional area of the hinge shaft 17 is smaller than that of the hinge hole 16, the device can only transmit force along the direction of the hinge shaft 17, namely transverse force, but not vertical force, so that when the slide block 14 slides under the action of the screw rod 13, the slide block 14 can transversely push the fork 15 to move, and when the fork 15 deflects up and down due to load change, the vertical force cannot be transmitted to the slide block 14, thereby avoiding deformation of the screw rod 13, further avoiding unsmooth sliding of the slide block 14 on the screw rod 13 and even damage of the screw rod 13. The effects of improving the operation and use experience and the service life of the screw rod 13 are achieved.

The above function can be achieved by providing the hinge holes 16 in the slider 14 and the fork 15 so that the cross-sectional area of one hinge hole 16 is larger than the cross-sectional area of the hinge shaft 17. For example, the slider 14 is provided with a hinge hole 16 having a sectional area larger than that of the hinge shaft 17, and the fork 15 may be provided with a hinge hole 16 having a sectional area equal to that of the hinge shaft 17.

In this embodiment, since the screw rod 13 only bears the force in the left-right direction, which is mainly the friction force when the fork 15 slides along the bearing rail 12, and is far smaller than the gravity of the fork 15 and the cargo, the screw rod 13 can select smaller specifications, and the production cost of the fork mechanism 1 can be saved.

In some embodiments of the fork mechanism 1 of the present utility model, as shown in fig. 3, the hinge aperture 16 is a vertically extending kidney-shaped aperture. The hinge shaft 17 is a circular shaft. In comparison with the case where the hinge hole 16 is provided as a circular hole and the diameter of the circular hole is larger than that of the hinge shaft 17, the hinge hole 16 is provided as a waist-shaped hole extending vertically, and the waist-shaped hole may have a diameter equal to that of the hinge shaft 17, so that the position of the hinge shaft 17 may be further restricted, and the hinge shaft 17 is prevented from shaking when the fork mechanism 1 operates due to an excessive gap between the hinge shaft 17 and the hinge hole 16. In addition, the provision of the hinge hole 16 as a waist-shaped hole extending vertically also allows a larger range of adjustable distances for non-rigid connection between the slider 14 and the fork 15, without transmitting vertical forces to the screw 13 even if the fork 15 is deformed to a large extent.

In some embodiments of the fork mechanism 1 of the present utility model, as shown in FIG. 3, the slider 14 is fixedly connected with a first hinge plate 141 that is vertically disposed. The fork 15 is fixedly connected with two second hinge plates 151 which are vertically arranged and are arranged at left and right intervals. The first hinge plate 141 is sandwiched between two second hinge plates 151. The hinge hole 16 is parallel to the lead screw 13, and the hinge hole 16 penetrates the first hinge plate 141 and the second hinge plate 151.

In this embodiment, the slider 14 is hinged to the fork 15 by a first hinge plate 141 and two second hinge plates 151. Since the first hinge plate 141 is sandwiched between the two second hinge plates 151, the first hinge plate 141 will abut against one of the second hinge plates 151 and push the fork 15 to slide leftwards or rightwards along the load bearing rail 12, regardless of whether the slider 14 slides leftwards or rightwards under the drive of the screw rod 13. By doing so, the lateral force of the slider 14 and the fork 15 during the movement is borne by the first hinge plate 141 and the second hinge plate 151, while the end closure of the hinge shaft 17 and the connected cotter pin are not subjected to the lateral force, the service life of the hinge shaft 17 and the cotter pin can be improved, and the specification of the hinge shaft 17 can be made smaller.

In some embodiments of the fork mechanism 1 of the present utility model, as shown in fig. 3, the spacing between the two second hinge plates 151 is greater than 0.25 times the sum of the thickness of the first hinge plate 141 and the lead of the lead screw 13.

In this embodiment, the first hinge plate 141 is sandwiched between the two second hinge plates 151, and when the first hinge plate 141 and the two second hinge plates 151 need to be separated, the first hinge plate 141 needs to be rotated by an angle with respect to the second hinge plate 151, and the first hinge plate 141 can be separated from the second hinge plate 151 by rotating by 90 ° at most. When the screw 13 rotates, the first hinge plate 141 rotates by 90 °, and slides by 0.25 times the lead of the screw 13 along the length direction of the screw 13. Therefore, in the present embodiment, the interval between the two second hinge plates 151 is set to be greater than the sum of the thickness of the first hinge plate 141 and 0.25 times the lead of the lead screw 13, so that the first hinge plate 141 is easily separated from the two second hinge plates 151.

In practice, when the center of gravity of the cargo is not at the center of the left-right direction of the volume, the lateral position of one of the two forks 15 needs to be adjusted to accommodate the center of gravity of the cargo. For this purpose, the hinge shaft 17 can be pulled out, the screw rod 13 is kept from rotating to keep the position of the other fork 15 unchanged, and the corresponding slide block 14 of the fork 15 to be moved is rotated outwards, so that the first hinge plate 141 rotates out of the two second hinge plates 151, and the fork 15 can be conveniently pushed to slide left and right. The slider 14 is then rotated to the position of the fork 15, the first hinge plate 141 is sandwiched between the two second hinge plates 151, and the hinge shaft 17 is inserted to re-hinge the slider 14 to the fork 15.

In some embodiments of the pallet fork mechanism 1 of the present utility model, as shown in fig. 1-2, the lead screw 13 includes a first lead screw 131 and a second lead screw 132 fixedly connected along a coaxial axis, the threads of the first lead screw 131 and the second lead screw 132 being oppositely threaded.

The number of the sliding blocks 14 is two, and the sliding blocks are respectively connected to the first screw rod 131 and the second screw rod 132 in a threaded sliding manner. The two forks 15 are hinged to the two sliders 14 respectively.

In this embodiment, the first screw rod 131 and the second screw rod 132 are coaxially and fixedly connected, and the connection mode may adopt welding, a coupling, etc., so that the rotation speeds of the first screw rod 131 and the second screw rod 132 are the same when they rotate. Since the screw threads of the first screw 131 and the second screw 132 are opposite in rotation direction, when the screw 13 is rotated clockwise or counterclockwise, the sliders 14 respectively provided on the first screw 131 and the second screw 132 are slid along the screw threads opposite in rotation direction, the moving directions in the left and right directions are opposite, that is, the two sliders 14 can be contracted toward the middle simultaneously or expanded toward both sides simultaneously. When the diameters of the threads of the first screw rod 131 and the second screw rod 132 are the same, the two sliding blocks 14 can be contracted or expanded at the same speed, and the two forks 15 are driven to be contracted or expanded at the same speed. In particular, when the two sliders 14 are symmetrically distributed with respect to the center of the screw rod 13, the two sliders 14 can drive the two forks 15 to contract or expand at the same speed and remain symmetrical with respect to the center of the screw rod 13 when the screw rod 13 rotates. In this way, the geometric centre of the two forks 15 is guaranteed to be on one centre line of the truck-mounted fork truck.

In some embodiments of the pallet fork mechanism 1 of the present utility model, as shown in fig. 1-2, the guide wheel 18 is rotatably disposed on the pallet fork 15 about a vertically extending rotation axis such that the wheel surface of the guide wheel 18 abuts against the front of the fork carriage 11.

The fork 15 is generally L-shaped and comprises a vertical section and a horizontal section, the vertical section being arranged on the fork carriage 11 by means of the load-bearing rail 12, and the fork 15 and the overall centre of gravity of the load being moved forward when the fork 15 is in operation, due to the heavier load. In order to maintain the forks 15 from rotating under gravity along the load bearing rails 12, the forks 15 are arranged with the vertical sections having a length, the vertical sections being wholly or at least with the lower ends of the vertical sections resting against the front of the fork carriage 11, so that a large supporting torque can be provided to the forks 15 against the torque exerted by the gravity of the forks 15 and the load on the forks 15. In this embodiment, a guide wheel 18 is provided at the lower portion of the fork 15, i.e., near the lower end of the vertical section, and the wheel surface of the guide wheel 18 abuts against the front of the fork carriage 11. During operation of the fork 15, the front face of the fork carriage 11 forms a thrust against the tread of the guide wheel 18, which is converted into a supporting torque against the weight of the fork 15 and the load, which torque is generated on the fork 15. When the position of the fork 15 is adjusted, the guide wheel 18 rolls in front of the fork frame 11 when the fork 15 moves left and right, so that friction force during movement of the fork 15 can be reduced, an operator can rotate the screw rod 13 with small force, and the fork 15 is driven to move left and right. On the other hand, since the friction force is small when the fork 15 moves, the specification of the screw rod 13 can be reduced, and the cost of the fork mechanism 1 can be further saved.

The two fork mechanism 1 embodiments shown in fig. 1 and 2 differ in that: the lower edge of the fork frame 11 of the fork mechanism 1 in fig. 1 is lower, the guide wheel 18 is positioned at the bottom of the fork frame 11, and the embodiment is suitable for a truck-mounted forklift with two walking legs with larger spacing (as shown in fig. 7); the lower edge of the middle fork 11 of the fork mechanism 1 of fig. 2 is higher, and the guide wheel 18 is positioned at the middle lower part of the fork 11, and the embodiment is suitable for a truck-mounted forklift with two walking legs with smaller spacing (as shown in fig. 6).

In some embodiments of the fork mechanism 1 of the present utility model, as shown in fig. 1-2, the guide wheel 18 has a thickness of greater than 30mm. The contact between the guide wheel 18 and the fork 11 is line contact, and the thickness of the guide wheel 18 is set to be larger, so that the line contact length of the guide wheel 18 can be increased, the line pressure can be reduced, and the deformation of the guide wheel 18 or the front of the fork 11 after long-term use can be avoided or reduced.

In some embodiments of the fork mechanism 1 of the present utility model, as shown in fig. 1-2, the load bearing rails 12 are circular and spaced apart in front of the fork carriage 11. The forks 15 are slidably connected to the load bearing rails 12 by means of a circular tubular sliding sleeve 19, the length of the sliding sleeve 19 in the axial direction being greater than 1.5 times the inner diameter of the sliding sleeve 19.

In this embodiment, the bearing rail 12 is a round steel or a steel tube, and a certain gap is formed between the bearing rail 12 and the fork 11, so as to provide an installation space for the sliding sleeve 19. The sliding sleeve 19 is sleeved on the bearing rail 12 in a sliding manner, and the structure enables the friction resistance to be small when the fork 15 moves along the bearing rail 12. The sliding sleeve 19 and the bearing rail 12 transmit supporting force through surface contact. Compared with the fork 15 directly placed on the bearing rail 12, the position of the fork 15 can be further limited by the sliding sleeve 19, so that the fork 15 is prevented from being accidentally separated from the bearing rail 12, and further, the goods drop or the truck-mounted forklift is prevented from being damaged.

When the vehicle is operated, the weight of the fork 15 and the goods is large, if the contact area between the sliding sleeve 19 and the surface of the bearing rail 12 is small, the pressure intensity is too large, and the surface of the sliding sleeve 19 or the bearing rail 12 may be deformed. In this embodiment, the length of the sliding sleeve 19 along the axial direction is set to be greater than 1.5 times of the inner diameter of the sliding sleeve 19, so that the contact area can be increased, the surface contact pressure can be reduced, and the deformation of the sliding sleeve 19 or the bearing rail 12 can be reduced or avoided.

In some embodiments of the fork mechanism 1 of the present utility model, as shown in fig. 1-2, the fork mechanism 1 further includes a hand wheel 4 fixedly coupled to one end of the lead screw 13 such that the lead screw 13 is rotated by the hand wheel 4. The hand wheel 4 can facilitate an operator to rotate the screw rod 13, so that the fork 15 can move left and right. A handle can be further arranged on the hand wheel 4 to further facilitate the operator to rotate the screw rod 13.

In some embodiments of the pallet fork mechanism 1 of the present utility model, a drive motor is coupled to the lead screw 13, which drives the lead screw 13 to rotate to adjust the lateral position of the pallet fork 15.

In some embodiments of the truck-mounted forklift of the present utility model, as shown in fig. 4-7, the truck-mounted forklift includes a forklift frame, a lift frame 2 slidably coupled to the forklift frame, and the fork mechanism 1 described above disposed on the lift frame 2. In this embodiment, the lifting frame 2 of the truck-mounted forklift adopts a screw rod to realize lifting. In other embodiments of the utility model, the truck-mounted fork lift truck 2 is lifted in the form of a hydraulic cylinder or the like.

In particular, in some embodiments of the truck-mounted fork lift of the present utility model, the truck-mounted fork lift 2 is configured to be lifted in the form of a hydraulic cylinder, and the truck-mounted fork lift is provided with two gantries, one being a fixed gantry and the other being a lifting gantry, the lifting gantry being driven by the hydraulic cylinder to lift up and down along the fixed gantry. The lifting portal frame is provided with a chain and a movable pulley assembly, and the lifting frame 2 is connected with the chain. In this way, the lifting stroke of the lifting frame 2 can be twice that of the lifting door frame, so that the overall height of the truck-mounted forklift is reduced.

In some embodiments of the truck-mounted fork truck of the present utility model, as shown in fig. 5-7, the truck-mounted fork truck further comprises a rear housing 4. The rear shell 4 is fixedly arranged at the rear side of the fixed door frame, the edges of the rear upper side, the rear left side and the rear right side of the rear shell 4 are provided with chamfers, and the whole rear shell 4 is in an armor shape protruding backwards gradually from the edge to the middle. In this way, on the one hand, the lifting mechanism and the lifting frame 2 can be protected from the rear side, and on the other hand, the whole structure of the truck-mounted forklift is compact, the appearance is attractive, and the feel of reliability and firmness is visually given to people.

In some embodiments of the truck-mounted forklift of the present utility model, as shown in fig. 6, the truck-mounted forklift further comprises a utility light 3, the utility light 3 comprising a light assembly 31 and a gooseneck 32. The lamp assembly 31 includes a warning light 311. One end of the gooseneck 32 is fixedly connected to the truck-mounted forklift, and the other end of the gooseneck 32 is fixedly connected with the lamp assembly 31. The gooseneck 32 is no less than 0.5 meters in length.

Truck-mounted forklifts are typically provided with warning lights 311 on the upper or side of the truck frame that are turned on during operation to alert surrounding personnel. When the size of the goods carried by the forklift truck is large, the warning lamp 311 on the upper part or the side part of the frame is easy to be shielded, so that potential safety hazards are caused. In this embodiment, the light assembly 31 is disposed on the truck via a gooseneck 32 having a certain length, and the gooseneck 32 can be bent at will to change the extending length, position and direction of the light assembly 31 relative to the truck. Even if the cargo volume is large, the warning lamp 311 can extend out of the cargo range, and the warning lamp 311 can reach the periphery of the forklift truck. When not in use, the gooseneck 32 is coiled up and the carriage retracted to avoid the lamp assembly 31 touching obstacles while the truck is moving.

In some embodiments of the truck-mounted forklift of the present utility model, as shown in fig. 6, the lamp assembly 31 further includes an illumination lamp 312, and the illumination lamp 312 is spaced apart from the warning lamp 311.

For the five-side sealed boxcar, the internal general illumination condition is poor, when the truck-mounted forklift enters the boxcar for operation, an illumination lamp 312 needs to be additionally arranged nearby, along with the movement of the truck-mounted forklift, operators also need to move the position and the angle of the illumination lamp 312 in the past to see the goods clearly, the operation is very inconvenient, and the working efficiency is low. In this embodiment, the lamp assembly 31 is further provided with an illumination lamp 312, and the illumination lamp 312 can also be freely adjusted with respect to the extension length, position and direction of the truck-mounted forklift, so that an operator can conveniently adjust the position of the cargo to be illuminated, and the working efficiency is improved.

In some embodiments of the truck-mounted forklift of the present utility model, as shown in fig. 6, the light assembly 31 further includes a turn light 314, the turn light 314 being spaced from the warning light 311.

In this embodiment, the light assembly 31 at the other end of the gooseneck 32 is provided with a turn light 314 because the gooseneck 32 is freely adjustable in extension and position. In use, for example, when the truck is turning to the left, the operator swings the light assembly 31 to the left of the frame and turns on the turn light 314.

In some embodiments of the truck-mounted forklift of the present utility model, as shown in fig. 6, the light assembly 31 further includes a light 312 and a turn light 314, the light 312 and the turn light 314 being spaced apart from the warning light 311. In this embodiment, the illumination lamps 312, the warning lamps 311 and the turn lamps 314 may be sequentially arranged at intervals along a straight line, or may be arranged at intervals in other manners.

In some embodiments of the truck-mounted fork truck of the present utility model, as shown in FIG. 5, a first end of the gooseneck 32 is fixedly attached to the rear of the truck frame. The first end is below 1.5 meters in height from the ground. As such, the gooseneck 32 or the light assembly 31 is relatively close to the operator for ease of manual operation by the operator.

In some embodiments of the truck-mounted forklift of the present utility model, as shown in fig. 6, the multipurpose light 3 further includes a shade 313, and a reflector is disposed at the rear side of the illumination lamp 312. In this embodiment, the light reflecting plate may be a flat plate, a semi-ellipsoidal plate, etc. The reflector has two functions, namely, converging the light rays emitted by the illumination lamp 312 to be converged in front of the forklift, and avoiding the direct irradiation of the light rays emitted by the illumination lamp 312 to eyes of operators.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the utility model have been shown and described herein in detail, many other variations or modifications of the utility model consistent with the principles of the utility model may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the utility model. Accordingly, the scope of the present utility model should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A fork mechanism for a truck-mounted forklift, comprising:

the fork frame is fixedly arranged on the lifting frame of the truck-mounted forklift;

the bearing rail is horizontally fixed in front of the fork frame;

the screw rod is parallel to the bearing rail and is rotatably arranged in front of the fork frame; at least one sliding block is connected to the screw rod in a threaded sliding manner;

a fork slidably connected to the load bearing rail; one of the fork and the sliding block is provided with a hinge hole, and the other is provided with or connected with a hinge shaft hinged with the hinge hole; and, the cross-sectional area of the hinge hole is larger than the cross-sectional area of the hinge shaft.

2. The fork mechanism of claim 1, wherein the hinge aperture is a vertically extending waist-shaped aperture; the hinge shaft is a round shaft.

3. The fork mechanism of claim 1, wherein,

the sliding block comprises a first hinged plate which is vertically arranged; the fork comprises two second hinged plates which are vertically arranged and are arranged at left and right intervals; the first hinge plate is clamped between the two second hinge plates;

the hinge hole is parallel to the screw rod and penetrates through the first hinge plate and the second hinge plate.

4. A pallet fork mechanism as recited in claim 3, wherein the spacing between two of said second hinge plates is greater than 0.25 times the sum of the thickness of said first hinge plate and the lead of said lead screw.

5. The fork mechanism of claim 1, wherein,

the screw rod comprises a first screw rod and a second screw rod which are coaxially and fixedly connected, and the screw threads of the first screw rod and the second screw rod are opposite in rotation direction;

the two sliding blocks are respectively connected with the first screw rod and the second screw rod in a threaded sliding manner;

the two forks are hinged to the two sliding blocks respectively.

6. The fork mechanism of claim 1, further comprising a guide wheel rotatably disposed on the fork about a vertically extending axis of rotation such that a tread of the guide wheel abuts a front face of the fork carriage.

7. The fork mechanism of claim 1, wherein the load bearing rails are circular and are spaced apart in front of the fork carriage;

the fork is connected to the bearing rail in a sliding way through a circular pipe-shaped sliding sleeve;

the length of the sliding sleeve along the axial direction is larger than 1.5 times of the inner diameter of the sliding sleeve.

8. A truck-mounted forklift truck comprising a forklift truck frame, a lifting frame slidably connected to the forklift truck frame, and a fork mechanism as claimed in any one of claims 1 to 7 disposed on the lifting frame.

9. The truck-mounted forklift of claim 8, further comprising a multi-purpose light, said multi-purpose light comprising:

a lamp assembly including a warning light;

a gooseneck, one end of which is fixedly connected to the truck-mounted forklift, and the other end of which is fixedly connected to the lamp assembly; the length of the gooseneck is not less than 0.5 meter.

10. The truck-mounted forklift of claim 9, wherein,

the lamp assembly further comprises an illuminating lamp and a light shielding plate, the illuminating lamp and the warning lamp are arranged at intervals, and the light shielding plate is arranged at the rear side of the illuminating lamp; and/or

The lamp assembly further comprises a steering lamp, and the steering lamp and the warning lamp are arranged at intervals.