Fork arm carrier system capable of forking goods bidirectionally

Abstract

The invention relates to the technical field of forklift loading and unloading equipment, in particular to a fork arm carrier system capable of forking goods bidirectionally. The hanging frame is arranged on the fork arm carrier in a lateral sliding manner; the sliding frame is arranged on the hanging frame in a front-back sliding manner; and the pallet fork is arranged on the sliding frame. The pallet fork is arranged at the bottom of the sliding frame in a lateral sliding mode. The driving mechanism drives the pallet fork to transversely move and slide in two directions relative to the sliding frame so as to adjust the extending position of the pallet fork relative to the sliding frame, and loading areas in different directions are formed; the fixing device is used for pressing the pallet fork after the pallet fork moves in place to prevent displacement; the sliding direction of the hanging frame is parallel to the pallet fork, and the hanging frame moves to control advancing and retreating of the pallet fork loading area. The scheme has the effects of improving the narrow channel operation efficiency and optimizing the storage space utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of forklift loading and unloading equipment, and particularly to a fork carriage system capable of bidirectionally picking up goods. Background Art

[0002] Traditional forklift fork carriages adopt a fixed fork structure, where the forks are rigidly installed on the fork carriage and cannot move. When operating in a narrow aisle with shelves on both sides, there are significant drawbacks: Firstly, when it is necessary to pick up goods on the opposite side of the aisle, the entire vehicle must be turned around, which not only greatly increases the single-operation time but also complicates the operation process; Secondly, to reserve the space required for turning around, the aisle width has to be increased, directly reducing the utilization rate of the storage space. Existing improved solutions, such as three-way stacker forklifts with a rotary fork design, although they can adjust the picking angle, have problems such as high drive torque requirements, high energy consumption, poor load-bearing stability, etc., and the rotation action requires additional space for support, which instead exacerbates the operational inconvenience in narrow aisles.

[0003] More critically, such solutions cannot achieve the function of bidirectional translation adjustment of the forks, and it is difficult to meet the dual requirements of modern warehousing logistics for efficient space utilization and flexible operation. Summary of the Invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a fork carriage system capable of bidirectionally picking up goods, which has the effects of improving the operation efficiency in narrow aisles and optimizing the utilization rate of the storage space.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The present application provides a fork carriage system capable of bidirectionally picking up goods, and the technical solution is as follows: A fork carriage system capable of bidirectionally picking up goods, comprising:

[0007] · A fork carriage for connecting to the mast;

[0008] · A hanging rack laterally slidably arranged on the fork carriage;

[0009] · A sliding rack longitudinally slidably arranged on the hanging rack;

[0010] · Forks arranged on the sliding rack; characterized in that:

[0011] · The forks are laterally slidably arranged at the bottom of the sliding rack;

[0012] · A driving mechanism that drives the forks to slide bidirectionally relative to the sliding rack to adjust the extended position of the forks relative to the sliding rack, forming loading areas in different orientations;

[0013] ● A fixing device for pressing the forks to prevent displacement after the forks move into place;

[0014] ● The sliding direction of the hanger is parallel to the fork, and the movement of the hanger is used to control the advancement and retreat of the loading area of the fork.

[0015] This technical solution realizes two-way adjustment and precise control of the fork through the cooperation of a multi-stage sliding structure. The fork frame, as the basic connecting component, supports the lateral sliding of the hanger. The hanger adjusts the lateral position of the entire fork on the mast through lateral movement to adapt to different aisle widths; the carriage slides back and forth on the hanger to control the longitudinal advancement and retreat of the fork to achieve front and back; the fork itself is laterally slidably arranged at the bottom of the carriage and is driven by a driving mechanism to translate bidirectionally, forming loading areas in different orientations, enabling the fork to pick up goods on the opposite side without turning the entire vehicle around. The fixing device ensures the operation stability by pressing the fork to avoid the risk of displacement. The design of the parallel sliding direction of the hanger and the fork enables the movement of the hanger to directly link the advancement and retreat of the loading area of the fork, forming a spatial synergy effect. The overall structure realizes multi-degree-of-freedom adjustment in a limited space, solving the steering limitation of fixed forks and the space occupation problem of rotary forks.

[0016] Furthermore, this application also proposes that a lifting frame for connecting the mast is provided in the middle of the fork frame; lateral sliding grooves and a second rack are provided on the surface of the fork frame; rollers embedded in the sliding grooves and driving gears meshing with the second rack are provided on the hanger; a hydraulic motor controls the rotation of the driving gear to drive the hanger to move laterally along the fork frame; optical axes in the front-back direction and double-acting cylinders are provided on the hanger; the carriage is slidably assembled on the optical axes and is connected to the output shaft of the double-acting cylinder; the double-acting cylinder controls the front-back sliding of the carriage relative to the hanger through the telescopic movement of the output shaft. This technical solution realizes the dual control of the lateral movement of the hanger and the front-back sliding of the carriage through structural collaborative design. The lifting frame in the middle of the fork frame provides a stable support base for the connection of the mast. The cooperation between the lateral sliding grooves and the rollers realizes the mechanical guidance of the lateral movement of the hanger to avoid deviation; the meshing of the second rack and the driving gear converts the rotational movement of the hydraulic motor into the linear movement of the hanger, enhancing the transmission accuracy of the lateral drive. The optical axes provide a low-friction linear sliding track for the carriage, and the output shaft of the double-acting cylinder directly drives the carriage to move back and forth through a rigid connection, realizing the precise control of the advancement and retreat of the carriage by using the bidirectional hydraulic action of the cylinder. The combination of mechanical cooperation and hydraulic drive for each feature not only ensures the stability of the lateral movement of the hanger but also realizes the efficient adjustment of the front-back sliding of the carriage, thus solving the problems of inaccurate positioning and load fluctuation caused by mechanical clearance or single driving mode in traditional fork frames.

[0017] Furthermore, the present application also proposes that a fork base is provided at the bottom of the carriage; a sliding channel penetrating the opposite side surfaces of the carriage is constructed on the fork base; and the fork is movably arranged in the fork base. This technical solution constructs a mechanical basis that allows the fork to translate bidirectionally by providing a fork base with a through-type sliding channel at the bottom of the carriage. Among them, the fork base serves as a load-bearing structure, and its through-type sliding channel on both sides provides a linear movement path for the fork that is not blocked by the carriage body, enabling the fork to freely extend or retract along both sides of the carriage. The structural design of the fork and the fork base forming a moving pair not only ensures the compact layout of the fork in the bottom space of the carriage but also ensures the stability and accuracy of the fork translation process through the sliding channel that limits the movement trajectory. This bidirectional adjustable structure enables the fork to select loading areas in different directions according to the operation requirements, breaking through the operation limitations of traditional fixed forks.

[0018] Furthermore, the present application also proposes that a first rack is welded on the fork; the driving mechanism includes a translation driving component arranged at the bottom of the carriage and an adjusting gear meshing with the first rack; the translation driving component drives the first rack to drive the fork to translate bidirectionally relative to the carriage. This technical solution realizes precise bidirectional translation control of the fork through the mechanical transmission structure of the rack and gear meshing. Specifically, welding the first rack on the fork body enables the fork to directly transmit the driving force through the rack when moving, avoiding the complex transmission chain required by traditional rotating mechanisms; arranging the translation driving component at the bottom of the carriage to cooperate with the adjusting gear, and using the meshing transmission relationship between the gear and the rack to convert the rotational motion of the driving component into the linear translation motion of the fork, which not only has high transmission efficiency but also better displacement control accuracy; by driving the forward and reverse rotation of the adjusting gear bidirectionally, the fork can adjust the extension position in both the left and right directions. Compared with the overall rotating fork solution, this structure occupies less space and does not require large torque drive. This design effectively reduces energy consumption and improves the adaptability to narrow space operations while ensuring the fork position adjustment function.

[0019] Furthermore, the present application also proposes that the fixing device includes:

[0020] ● A pressing oil cylinder and a pressing spring fixed inside the carriage;

[0021] ● A shaft rod fixed on the piston rod of the pressing oil cylinder;

[0022] ● A bushing axially movably sleeved on the lower end of the shaft rod; the pressing spring is sleeved on the shaft rod above the bushing, and both ends respectively press against the shaft rod and the bushing; when the piston rod of the pressing oil cylinder presses down, the downward pressure is transmitted to the bushing through the pressing spring, and the bushing presses the fork to prevent overpressure damage.

[0023] This technology drives the piston rod of the pressing cylinder to press downwards, and uses the elastic deformation of the pressing spring to transfer the downward pressure to the bushing, thereby pressing the forklift forks. The design of the bushing being axially movably sleeved on the lower end of the shaft rod enables the pressing spring to form a buffer between the shaft rod and the bushing, avoiding damage to the forklift forks or carriage structure due to excessive direct force during rigid pressing. When the piston rod of the pressing cylinder presses downwards, the elastic compression of the pressing spring can adaptively adjust the pressing force, ensuring that the forklift forks are firmly pressed by the bushing and absorbing the overload pressure through the buffering effect of the spring to prevent overpressure. As the component that finally contacts the forklift forks, the axial movement characteristics of the bushing ensure uniform force during the pressing process and avoid local stress concentration.

[0024] Furthermore, this application also proposes that a pressing plate is provided at the upper end of the shaft rod, and the upper end of the pressing spring presses against the pressing plate; a contact switch is provided inside the carriage, including an upper contact switch and a lower contact switch; when the piston rod drives the shaft rod to move, the pressing plate cooperates with the upper contact switch to feedback the movement state of the forklift forks, and cooperates with the lower contact switch to feedback the pressing state. This technical solution realizes the accurate feedback of the forklift fork state through the linkage design of the pressing plate and the contact switch. A pressing plate is provided at the upper end of the shaft rod, and the upper end of the pressing spring presses against the pressing plate to form a stable transmission path for the spring force. A contact switch including an upper contact switch and a lower contact switch is provided inside the carriage, and dual-state detection is achieved through the contact of the pressing plate with different contacts: when the piston rod drives the shaft rod to move, the pressing plate contacts the upper contact switch to trigger a movement state signal, reflecting whether the forklift forks are in an adjustable movement stage; when the pressing plate contacts the lower contact switch, it indicates that the pressing action has been completed and a locked state has been formed. This design of triggering in stages realizes the independent feedback of the forklift fork movement process and the fixing process, which can not only avoid damage to components caused by continuous pressure during misoperation but also ensure safe locking after the pressing is in place. The physical contact structure of the contact switch has stronger anti-interference ability than an electronic sensor and can still maintain reliable detection in the vibration environment of forklift operation.

[0025] Furthermore, the present application also proposes that two sets of detection components are provided on the carriage; feedback components are provided at both ends of the fork; when the fork slides bidirectionally, the two sets of detection components respectively detect the feedback components at both ends of the fork to judge the extending direction and the in-place state of the fork. This technical solution realizes precise monitoring of the bidirectional translation sliding process of the fork by providing two sets of detection components on the carriage and respectively configuring feedback components at both ends of the fork. The two sets of detection components on the carriage respectively correspond to the feedback components at both ends of the fork. When the fork moves in any direction, the corresponding detection component can capture the signal of the feedback component. This design enables the system to synchronously obtain the displacement information at both ends during the bidirectional translation of the fork, so as to accurately judge the extending direction of the fork and whether it reaches the predetermined position. The symmetrical arrangement of the feedback components at both ends of the fork enables the detection component to trigger the detection signal through the corresponding feedback component whether the fork slides to the left or right, avoiding the blind area or misjudgment that may exist in single-direction detection. The collaborative work of the two sets of detection components further improves the detection redundancy, ensuring that the in-place state can be reliably recognized during the movement of the fork and solving the problem of inaccurate positioning caused by the lack of a bidirectional detection mechanism in traditional forks.

[0026] Furthermore, the present application also proposes that two sets of collision sensing components are provided on the fork; each set of collision sensing components includes a tip collision switch provided at the end of the fork for feeding back the collision signal at the front end of the fork; the two tip collision switches respectively adapt to different loading areas formed by the bidirectional telescoping of the fork. This technical solution conducts collision detection for different loading directions formed when the fork telescopes bidirectionally by providing two sets of independently acting collision sensing components. The two tip collision switches are respectively installed at both ends of the fork. When the fork extends in any direction to form a loading area, the tip collision switch in the corresponding direction can immediately sense the contact or collision between the front end of the fork on that side and the goods. This bidirectional and symmetrical detection mechanism enables the collision signal to be captured in a timely manner through the tip collision switch on the corresponding side whether the fork telescopes to the left or right to form a loading area, solving the technical defect that the traditional single-direction detection device cannot adapt to the bidirectional telescoping structure. The tip collision switch is directly provided at the end of the fork, which can accurately locate the position where the collision occurs, avoiding the detection failure caused by the change of the front-end position of the fork after telescoping and ensuring the operation safety in different loading directions.

[0027] Furthermore, the present application also proposes that the collision sensing component further includes a brush plate connected to the tip collision switch; the brush plate is installed at the other end of the fork away from the corresponding tip collision switch; a wire harness connection device is provided on the carriage, and its probe can selectively contact the surface of the fork; when the fork moves in place in any direction, the probe contacts the copper sheet of the brush plate to realize the electrical connection of the tip collision switch and the collision feedback.

[0028] This technical solution forms a detection circuit corresponding to different extension directions of the fork by placing the brush plate and the fork tip collision switch at both ends of the fork. When the fork moves sideways to a certain extreme position, the probe contacts the brush plate, causing the circuit of the fork tip collision switch on that side to be turned on, thereby transmitting the collision signal to the control system. The contact method between the brush plate and the probe avoids the problem of entanglement or breakage of traditional cables caused by the reciprocating motion of the fork. The harness connection device ensures that the probe and the fork surface remain in a non-contact state during the movement of the fork through the elastic contact design of the probe, and conducts electricity only through the copper sheet when it is in place, reducing friction loss. The combination of the electromagnet and the spring controls the extension and retraction of the probe. When the fork moves, the electromagnet adsorbs the probe from the surface. When it is in place, the power is cut off to release the spring pressure to make the probe reliably contact. This design ensures both freedom of movement and contact stability.

[0029] Furthermore, the present application also proposes that the wiring harness connection device includes:

[0030] A probe holder for mounting the probe;

[0031] An electromagnet fixed to the probe holder;

[0032] A base corresponding to the electromagnet; the probe bracket is slidably arranged on the slide bar of the base; a spring is sleeved on the slide bar between the probe bracket and the base; when the fork moves, the electromagnet is energized to adsorb the base, so that the probe is separated from the fork surface; when the fork is in place, the electromagnet is de-energized, and the spring pushes the probe to contact the brush plate.

[0033] This technical solution dynamically controls the contact state between the probe and the fork surface through the synergistic effect of the electromagnet and the spring. The slide bar and spring arranged between the probe bracket and the base enable the probe bracket to have an elastic sliding function. When the fork moves, the electromagnet is energized to adsorb the base, and the magnetic force is used to overcome the spring resistance to lift the probe off the fork surface, thereby avoiding the wear of the probe and fork surfaces caused by moving friction. The probe bracket is slidably arranged on the slide bar to ensure the stability of the probe's moving trajectory. After the fork is in place, the electromagnet is powered off, and the spring releases the stored elastic potential energy to push the probe bracket to slide along the slide bar, so that the probe accurately contacts the copper sheet of the brush plate, thereby realizing the circuit conduction of the fork tip collision switch. This design not only ensures the non-contact state when the fork moves, but also realizes a reliable electrical connection after it is in place. At the same time, the damage to the probe caused by mechanical impact is eliminated through the cooperation of the electromagnet and the spring.

[0034] From the above, it can be seen that the present application provides a fork frame system capable of bidirectional forking and picking up goods and a control method thereof, which forms loading areas in different directions through bidirectional translation adjustment of the fork, and combines the coordinated sliding control of the hanger and the slide frame to solve the problem that traditional forklifts need to turn the entire vehicle around and waste channel space, and has the effect of improving the operating efficiency of narrow channels and optimizing the utilization of storage space. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A three-dimensional schematic diagram of a forklift carriage system for two-way picking of goods provided by this application.

[0036] Figure 2 A schematic diagram of a forklift carriage system provided by this application in a state where the hidden hanger side plate is in a hidden state.

[0037] Figure 3 A cross-sectional schematic diagram of a forklift carriage system provided by this application.

[0038] Figure 4 A three-dimensional schematic diagram of a two-way telescopic forklift structure, in the figure, the forklift is located on the right side of the carriage.

[0039] Figure 5 A three-dimensional schematic diagram of a two-way telescopic forklift structure, in the figure, the forklift is located on the left side of the carriage.

[0040] Figure 6 A front cross-sectional view of a two-way telescopic forklift structure.

[0041] Figure 7 A side cross-sectional view of a two-way telescopic forklift structure.

[0042] Figure 8 For Figure 7 An enlarged view of part A.

[0043] Figure 9 A three-dimensional view of the outer side of the forklift.

[0044] Figure 10 A three-dimensional view of the inner side of the forklift.

[0045] Figure 11 A top view of the forklift.

[0046] Figure 12 For Figure 11 An enlarged view of part B.

[0047] Figure 13 For Figure 12 An enlarged view of part C. Specific embodiments

[0048] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0051] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0053] In the prior art, the fork carriage 1, as an important component of a forklift, usually adopts a fixed structure, and the fork 4 is rigidly mounted and cannot move. When operating in a narrow passage, the whole vehicle needs to turn around to pick up the goods on the opposite side, resulting in a decrease in operation efficiency and a waste of passage space. Although the rotary fork 4 can adjust the angle, it requires a large torque drive and has a limited load-bearing capacity, and the large rotary space required cannot adapt to a narrow environment.

[0054] To solve the above problems, the present application proposes a fork frame system capable of two-way goods picking. As Figure 1-13 shown, the fork frame system includes a fork frame 1 connected to the mast, a hanging frame 2 slidably arranged laterally on the fork frame 1, a sliding frame 3 slidably arranged longitudinally on the hanging frame 2, and a fork 4 arranged on the sliding frame 3. The fork 4 is slidably arranged laterally at the bottom of the sliding frame 3, a driving mechanism drives the fork 4 to translate bidirectionally to adjust the extended position, a fixing device 5 presses the fork 4 to prevent displacement, and the sliding direction of the hanging frame 2 is parallel to that of the fork 4 to control the advance and retreat of the loading area.

[0055] The fork frame 1 refers to a base structure for carrying other components, which can be specifically realized by a welded frame structure, and is used to connect the forklift mast and provide sliding track support. The hanging frame 2 refers to a load-bearing component with lateral movement function, and is used to adjust the overall lateral position of the fork 4. The sliding frame 3 refers to a transition component with longitudinal movement function, and is used to control the longitudinal advance and retreat of the fork 4. The lateral sliding of the fork 4 means lateral movement along the bottom of the sliding frame 3, and is used to form loading areas with different orientations. The driving mechanism refers to a translational power source. The fixing device 5 refers to a positioning mechanism for the fork 4, and is used to stabilize the fork 4 during operation. Specifically, the fork frame 1 serves as a basic support structure, the hanging frame 2 adjusts the lateral position of the fork 4 through lateral sliding, and the sliding frame 3 controls the longitudinal advance and retreat of the fork 4 through longitudinal sliding. The fork 4 itself performs bidirectional translation at the bottom of the sliding frame 3 to form loading areas on both the left and right sides. When it is necessary to pick goods on the opposite side, the driving mechanism drives the fork 4 to move laterally to the target side, the hanging frame 2 moves forward and backward synchronously to adjust the direction, and the fixing device 5 presses and locks after the fork 4 reaches the position. The design of the parallel sliding direction of the hanging frame 2 and the fork 4 enables the lateral position adjustment and the longitudinal advance and retreat to form spatial coordination, avoiding the turning action of the whole vehicle. Through the above technical solutions, the present application realizes the two-way goods picking function of the fork 4, eliminates the turning action of the whole vehicle, and improves the operation efficiency in narrow channels. The translational adjustment of the fork 4 replaces the rotation action, reduces energy consumption and maintains the structural strength. The multi-stage sliding cooperative control makes the positioning of the fork 4 more accurate, avoiding the problem of space waste in the traditional solution. The fixing device 5 ensures the operation stability and prevents the risk of displacement of the fork 4.

[0056] In a specific embodiment, the fork carriage 1 includes a lifting frame 1.3 disposed in the middle for connecting the mast; on the surface of the fork carriage 1, there are a lateral chute 1.4 and a second rack 1.5; on the hanging frame 2, there are rollers 2.1 embedded in the chute 1.4 and a drive gear 2.2 meshing with the second rack 1.5; a hydraulic motor 2.3 controls the rotation of the drive gear 2.2 to drive the hanging frame 2 to move laterally along the fork carriage 1; on the hanging frame 2, there are an optical axis 2.4 in the front-rear direction and a double-acting cylinder 2.5; the carriage 3 is slidably assembled on the optical axis 2.4 and connected to the output shaft of the double-acting cylinder 2.5; the double-acting cylinder 2.5 controls the carriage 3 to slide back and forth relative to the hanging frame 2 by the telescopic movement of the output shaft. Among them, the lifting frame 1.3 refers to the support structure connecting the mast and the fork carriage 1, and can be specifically fixed in the middle of the fork carriage 1 by welding or bolt connection. Its function is to provide a stable support base for the mast and ensure the overall structural rigidity of the fork carriage 1 during the lateral movement of the hanging frame 2. The lateral chute 1.4 refers to a linear guiding groove opened along the length direction of the fork carriage 1, and can be specifically a U-shaped groove or a T-shaped groove structure. Its function is to limit the lateral movement track of the hanging frame 2 and prevent deviation. The second rack 1.5 refers to a straight tooth-shaped structure arranged parallel to the lateral chute 1.4, and its function is to mesh with the drive gear 2.2 to convert the rotational motion into a linear motion. The roller 2.1 refers to a guiding element embedded in the lateral chute 1.4, and can be specifically a nylon roller with a deep groove ball bearing. Its function is to reduce the frictional resistance when the hanging frame 2 moves laterally. The drive gear 2.2 refers to a transmission component meshing with the second rack 1.5, and its function is to convert the torque output by the hydraulic motor 2.3 into the linear driving force of the hanging frame 2. The optical axis 2.4 refers to a cylindrical guiding shaft arranged along the front-rear direction of the hanging frame 2, and its function is to provide a low-friction sliding track for the carriage 3. The double-acting cylinder 2.5 refers to a linear actuator driven by two-way hydraulics, and can be specifically a hydraulic cylinder. Its function is to directly control the back-and-forth movement of the carriage 3 through the telescopic movement of the output shaft. In this solution, the lifting frame 1.3, as the connection node between the fork carriage 1 and the mast, keeps the fork carriage 1 stable when bearing loads by enhancing the structural rigidity in the middle. The cooperation between the lateral chute 1.4 and the roller 2.1 forms a mechanical guiding mechanism to eliminate the lateral offset when the hanging frame 2 moves laterally. The meshing transmission between the second rack 1.5 and the drive gear 2.2 converts the rotational power of the hydraulic motor 2.3 into an accurate linear displacement, and the accurate control of the lateral movement speed of the hanging frame 2 is achieved by adjusting the rotation speed of the hydraulic motor 2.3. The optical axis 2.4 provides a linear sliding track for the carriage 3, and its surface hardening treatment ensures wear resistance during long-term use. The double-acting cylinder 2.5 realizes two-way stable drive through symmetrically arranged oil circuits, and the rigid connection between the output shaft and the carriage 3 ensures the effective transmission of the driving force. When it is necessary to adjust the position of the fork 4, the hydraulic motor 2.3 drives the drive gear 2.2 to drive the hanging frame 2 to move laterally along the fork carriage 1, and at the same time, the double-acting cylinder 2.5 pushes the carriage 3 to slide back and forth along the optical axis 2.4. The combination of these two movements realizes the multi-dimensional adjustment of the spatial position of the fork 4.This solution effectively improves the stability and positioning accuracy of the lateral movement of the bracket 2 through the mechanical guidance constraints of the lateral slide 1.4 and the roller 2.1, combined with the precise transmission of the rack and pinion. The combined design of the optical axis 2.4 and the double-acting cylinder 2.5 not only ensures the straightness of the forward and backward movement of the slide 3, but also achieves rapid response and precise control through hydraulic drive.

[0057] like Figure 4 As shown, a fork base 4.2 is provided at the bottom of the slide 3, and a sliding channel is constructed on the fork base 4.2 that passes through the two opposite sides of the slide 3, and the fork 4 is movably arranged in the fork base 4.2. Among them, the fork base 4.2 refers to a bearing structure fixed to the bottom of the slide 3, which can be specifically implemented by a metal frame fixed by welding or bolts, and its function is to provide guidance and support for the bidirectional movement of the fork 4. The sliding channel refers to a linear moving path arranged along the length direction of the fork base 4.2, which can be specifically implemented by a groove or guide rail structure, and a bidirectional moving space is formed by a design that passes through the two sides of the slide 3. The moving arrangement of the fork 4 refers to the fork 4 and the sliding channel forming a moving pair, which can be specifically implemented by the cooperation of a slider and a guide rail to ensure that the fork 4 can translate stably in the sliding channel.

[0058] In this scheme, the fork base 4.2 is rigidly connected to the bottom of the slide 3 as a basic bearing component, and its transversely extending sliding channel penetrates the two sides of the slide 3 to form a two-way through moving space. The fork 4 is embedded in the guide rail of the sliding channel through the slider arranged at the bottom, forming a constraint relationship that only allows translation along the axis of the channel. When the driving mechanism applies thrust, the fork 4 moves to the left or right along the sliding channel, and its moving range is limited by the length of the channel. When the fork 4 moves outward, the end of the fork 4 can extend from the left or right side of the slide 3 to form loading areas in different directions. This structure prevents the fork 4 from deflecting or shaking by limiting the sliding channel of the moving trajectory of the fork 4. At the same time, the through-type design prevents the fork 4 from being blocked by the space of the slide 3 body when it is extended in both directions. Compared with the prior art, the existing fork frame 1 adopts a fixed installation or an integral rotating structure. The former cannot adjust the position of the fork 4, resulting in insufficient operational flexibility, and the latter requires a large torque drive and occupies a rotating space. This solution realizes bidirectional position adjustment of the fork 4 in a limited space through the linear movement design of the fork base 4.2 and the sliding channel, without the need for overall rotation, which reduces energy consumption and avoids space waste. Through the above technical solution, this application realizes flexible position adjustment of the fork 4 in a narrow channel. During operation, the loading direction can be switched by only moving the fork 4 horizontally, avoiding the whole vehicle turning around, significantly improving the efficiency of cargo storage and retrieval and reducing the channel width requirements. The matching structure of the fork base 4.2 and the sliding channel ensures the load stability while making the movement process of the fork 4 precisely controllable, effectively adapting to the space limitations of different operation scenarios.

[0059] In a specific embodiment, a first rack 4.1 is welded to the fork 4. The driving mechanism includes a translation driving component 4.3 provided at the bottom of the carriage 3 and an adjusting gear 4.4 meshing with the first rack 4.1. The translation driving component 4.3 drives the fork 4 to translate bidirectionally relative to the carriage 3 by driving the first rack 4.1. Among them, the first rack 4.1 refers to a metal strip structure with a continuous tooth profile welded to the fork 4, and its tooth surface meshes with the tooth grooves of the adjusting gear 4.4 to transmit the driving force through tooth surface meshing. The translation driving component 4.3 refers to a mechanical device that outputs rotational power, and specifically, a servo motor or a hydraulic motor can be used to implement it. Its output shaft is connected to the central shaft of the adjusting gear 4.4 through a coupling. The adjusting gear 4.4 refers to a cylindrical gear that forms a meshing relationship with the first rack 4.1, and converts the rotational motion into a linear displacement through tooth surface contact. When the translation driving component 4.3 drives the adjusting gear 4.4 to rotate clockwise or counterclockwise, the first rack 4.1 meshing with the adjusting gear 4.4 will perform a linear motion along the preset sliding channel at the bottom of the carriage 3. When the adjusting gear 4.4 rotates clockwise, the first rack 4.1 drives the fork 4 to translate to the left; when the adjusting gear 4.4 rotates counterclockwise, the first rack 4.1 drives the fork 4 to translate to the right. Since the meshing transmission between the gear and the rack has a fixed transmission ratio, the moving distance of the fork 4 is linearly proportional to the number of rotation turns of the adjusting gear 4.4, thereby achieving precise control of the displacement. The entire driving mechanism directly acts on the fork 4 body without setting an intermediate transmission chain or a rotating support structure.

[0060] As Figures 6-8 shown, this embodiment also proposes that the fixing device 5 includes a pressing oil cylinder 5.1 and a pressing spring 5.2 fixed inside the carriage 3, a shaft rod 5.3 fixed on the piston rod of the pressing oil cylinder 5.1, and a shaft sleeve 5.4 axially movably sleeved on the lower end of the shaft rod 5.3; the pressing spring 5.2 is sleeved on the shaft rod 5.3 above the shaft sleeve 5.4, and its two ends respectively press against the shaft rod 5.3 and the shaft sleeve 5.4; when the piston rod of the pressing oil cylinder 5.1 presses down, the downward pressure is transmitted to the shaft sleeve 5.4 through the pressing spring 5.2, and the shaft sleeve 5.4 presses the fork 4 to prevent overpressure damage.

[0061] Among them, the pressing oil cylinder 5.1 refers to a linear actuator driven by hydraulic pressure, which can be specifically implemented by a double-acting oil cylinder or a single-acting oil cylinder, and is used to provide axial pressing force. The pressing spring 5.2 refers to a mechanical element with the ability of elastic deformation, which can be specifically implemented by a helical spring or a disc spring, and is used to buffer the impact force during the pressing process. In practice, a high-pressure spring is used to ensure the pressing force. The shaft rod 5.3 refers to a transmission component rigidly connected to the piston rod of the pressing oil cylinder 5.1, which can be specifically processed from medium carbon steel or alloy steel, and is used to transmit the output force of the pressing oil cylinder 5.1. The shaft sleeve 5.4 refers to a contact component that can slide axially along the shaft rod 5.3, which can be specifically made of copper alloy or steel-based composite material, and is used to evenly transmit the pressing force to the surface of the forklift fork 4. When the piston rod of the pressing oil cylinder 5.1 moves downward, the shaft rod 5.3 moves downward accordingly, and the pressing spring 5.2 is compressed and undergoes elastic deformation; the elastic force of the spring is applied to the surface of the forklift fork 4 through the shaft sleeve 5.4 to achieve the pressing effect. During the contact process between the shaft sleeve 5.4 and the forklift fork 4, if there is a position deviation of the forklift fork 4 or a change in the external load, the elastic deformation of the pressing spring 5.2 can adaptively adjust the pressing force to avoid stress concentration caused by rigid contact. The axial sliding design of the shaft sleeve 5.4 allows it to freely adjust the contact angle within a certain range to ensure that the pressing force is evenly distributed on the surface of the forklift fork 4.

[0062] Through the combination of the elastic element and the sliding component, this solution forms a buffer protection mechanism while maintaining the pressing force, eliminating the risk of structural damage caused by rigid impact. Through the above technical solution, this application solves the problem of overpressure damage caused by rigid pressing when the forklift fork 4 is fixed, absorbs abnormal loads through the elastic buffering effect of the spring, and at the same time ensures that the forklift fork 4 obtains a stable pressing and fixing effect after moving into place, avoiding displacement caused by vibration or impact during operation.

[0063] Further, a pressing plate 5.5 is provided at the upper end of the shaft rod 5.3, and the upper end of the compression spring 5.2 presses against the pressing plate 5.5; a contact switch is provided inside the carriage 3, including an upper contact switch 5.6 and a lower contact switch 5.7; when the piston rod drives the shaft rod 5.3 to move, the pressing plate 5.5 cooperates with the upper contact switch 5.6 to feedback the moving state of the fork 4, and cooperates with the lower contact switch 5.7 to feedback the pressing state. Among them, the pressing plate 5.5 refers to a plate-like structure provided at the top of the shaft rod 5.3, and specifically, it can be welded with a metal plate or fixed to the top of the shaft rod 5.3 by bolts, and is used to transmit the pressure of the compression spring 5.2 and trigger the contact switch. The contact switch refers to an electrical signal triggering device including independent contacts, and specifically, a mechanical microswitch or a reed contact switch can be used. The upper contact switch 5.6 is arranged above the moving path of the pressing plate 5.5, and the lower contact switch 5.7 is arranged below the moving path of the pressing plate 5.5, and the distance between the two is determined according to the pressing stroke. The compression spring 5.2 refers to an elastic element sleeved on the shaft rod 5.3, and specifically, a cylindrical helical spring can be used, and its two ends respectively press against the pressing plate 5.5 and the bushing 5.4, and buffers the pressure through elastic deformation during the pressing process and maintains a stable pressing force.

[0064] Specifically, when the piston rod of the pressing oil cylinder 5.1 drives the shaft rod 5.3 to move downward, the pressing plate 5.5 moves synchronously with the shaft rod 5.3 and gradually disengages from the upper contact switch 5.6. At this time, the moving state signal is cancelled, indicating that the fork 4 has entered the adjusted state; when the pressing plate 5.5 continues to move downward and contacts the lower contact switch 5.7, the pressing state signal is triggered, indicating that the bushing 5.4 has completely pressed the fork 4. When the fork 4 needs to be released, the piston rod drives the shaft rod 5.3 to move upward, the pressing plate 5.5 disengages from the lower contact switch 5.7 and contacts the upper contact switch 5.6. At this time, the pressing state signal is cancelled and the moving state signal is activated. Through the linkage of the pressing plate 5.5 and the contact switch, the movement and pressing state of the fork 4 are detected in real time and fed back to the control system, avoiding misoperation of the movement of the fork 4 when the fixing device 5 is not fully released, or carrying goods when not fully pressed. Through the above technical solution, the present application realizes the independent detection and real-time feedback of the movement and pressing state of the fork 4, ensures that the fixing device 5 only allows the movement of the fork 4 after it is completely released, and locks the fork 4 after being pressed in place, preventing the fork 4 from slipping or component overpressure damage caused by inaccurate operation, and improving the operation safety and operation reliability.

[0065] Such as Figure 8, as shown in Figures 10 and 11, two sets of detection components 7 are provided on the carriage 3; feedback components 4.7 are provided at both ends of the fork 4; when the fork 4 slides bidirectionally, the two sets of detection components 7 respectively detect the feedback components 4.7 at both ends of the fork 4 to determine the extending direction and in-place state of the fork 4. Among them, the detection component 7 refers to a sensing device for detecting the position state of the fork 4, and specifically, an optoelectronic sensor or a proximity switch can be used to achieve it, and its function is to obtain the position signal of the fork 4 in real time during movement. The feedback component 4.7 refers to an identifiable mark fixed at both ends of the fork 4, and specifically, a metal block, a reflector or a through hole can be used to achieve it, and its function is to provide an identifiable physical trigger condition for the detection component 7. When the fork 4 translates in a certain direction, the feedback components 4.7 at both ends of the fork 4 will respectively enter the induction areas of the corresponding detection components 7. For example, when the fork 4 slides to the preset position to the right, the left feedback component 4.7 triggers the left detection component 7 to generate a first signal, and the right feedback component 4.7 moves away from the right detection component 7 resulting in the disappearance of the second signal. Through the signal change timing sequence of the two sets of detection components 7, the system can determine that the moving direction of the fork 4 is rightward in place, and the feedback component 4.7 at the corresponding end is continuously sensed by the detection component 7 to generate an in-place locking signal. When the fork 4 slides to the left, the cooperation logic between the right detection component 7 and the feedback component 4.7 is opposite, thereby achieving accurate judgment of bidirectional movement. Through the above technical solution, this application solves the problems of fuzzy direction recognition and misjudgment of the in-place state when the fork 4 slides bidirectionally, avoids cargo collision or picking and placing failure caused by positioning errors, and improves the operation efficiency and system stability.

[0066] As Figures 9-13As shown in the figure, two sets of collision sensing components are provided on the forklift forks 4. Each set of collision sensing components includes a fork tip collision switch 6.5 provided at the end of the forklift forks 4. The two sets of fork tip collision switches 6.5 respectively adapt to different loading areas formed by the bidirectional telescoping of the forklift forks 4. Among them, the collision sensing component refers to a device for sensing the contact or collision between the front end of the forklift forks 4 and the goods. Specifically, a contact mechanical switch or a pressure sensor can be used to achieve this, and the collision state is fed back through a trigger signal. The fork tip collision switch 6.5 refers to a contact sensor installed at the end of the forklift forks 4. Specifically, a micro switch or an elastic conductive sheet structure can be used to achieve this. When the front end of the forklift forks 4 contacts the goods, the fork tip collision switch 6.5 is pressed and closed to form an electrical signal. The different loading areas formed by bidirectional telescoping refer to the loading directions formed when the forklift forks 4 extend to the left and right sides respectively through lateral sliding. Specifically, it can be achieved by controlling the forklift forks 4 to translate bidirectionally at the bottom of the carriage 3 through a driving mechanism. The two sets of fork tip collision switches 6.5 respectively correspond to the front end positions when extending to the left and right sides. When the forklift forks 4 extend to the left, the fork tip collision switch 6.5 at the left end is at the front end of the loading area. At this time, if the front end of the forklift forks 4 contacts the goods, the left fork tip collision switch 6.5 is pressed to trigger a signal; when the forklift forks 4 extend to the right, the fork tip collision switch 6.5 at the right end switches to the front end detection position to monitor the right collision state in real time. The two sets of collision sensing components work independently, and their trigger signals are automatically matched with the extending direction of the forklift forks 4 to ensure that regardless of the telescoping state of the forklift forks 4, the collision signals at the corresponding front ends can be accurately captured. During the movement of the forklift forks 4, the installation position of the fork tip collision switch 6.5 always remains synchronized with the front end of the current loading direction to avoid detection blind spots caused by the position change of the forklift forks 4.

[0067] In a specific solution, the collision sensing component further includes a brush plate 6.1 connected to the fork tip collision switch 6.5; the brush plate 6.1 is installed at the other end of the forklift forks 4 away from the corresponding fork tip collision switch 6.5; a wire harness connection device 6 is provided on the carriage 3, and its probe 6.3 can selectively contact the surface of the forklift forks 4; when the forklift forks 4 move in place in any direction, the probe 6.3 contacts the copper sheet of the brush plate 6.1 to realize the circuit connection of the fork tip collision switch 6.5 and the collision feedback.

[0068] Among them, the brush plate 6.1 refers to a conductive component with copper sheets on its surface. Specifically, it can be achieved by plating copper on the surface of a metal substrate, and is used to contact the probe 6.3 to form a conductive circuit when the forklift forks 4 move in place. Among them, the wire harness connection device 6 refers to a circuit connection mechanism with an elastic probe 6.3. Specifically, it can be achieved by the structure of a probe bracket 6.6 cooperating with a slide bar 6.8, and is used to establish a stable electrical contact in the stationary state of the forklift forks 4, which will be specifically elaborated below. Among them, the probe 6.3 refers to a conductive component with elastic telescopic function. Specifically, it can be achieved by a spring-loaded copper needle, and is used to automatically contact the brush plate 6.1 to conduct the circuit when the forklift forks 4 are in place.

[0069] In some specific embodiments, a limit block is provided between the probe bracket 6.6 and the base 6.7 to limit the maximum telescopic stroke of the probe 6.3; the surface of the copper sheet can be covered with an anti-oxidation coating to improve the conductive stability; the contact pressure between the probe 6.3 and the brush plate 6.1 is controlled by adjusting the spring preload.

[0070] Through the above technical solution, the present application realizes directional feedback of the collision detection signal during the bidirectional movement of the fork 4, thereby preventing mutual interference between sensor signals in different directions; through the non-contact circuit connection design, the risk of breakage caused by repeated bending of the cable is avoided; the compact contact matching structure adapts to the space limitations of the narrow working environment, ensuring detection accuracy and equipment reliability.

[0071] In a specific implementation scheme, the harness connection device 6 includes a probe bracket 6.6 for mounting the probe 6.3, an electromagnet 6.4 fixed on the probe bracket 6.6, a base 6.7 corresponding to the electromagnet 6.4, the probe bracket 6.6 is slidably arranged on a slide bar 6.8 of the base 6.7, and a spring 6.9 is sleeved on the slide bar 6.8 between the probe bracket 6.6 and the base 6.7. When the fork 4 moves, the electromagnet 6.4 is energized to adsorb the base 6.7 to separate the probe 6.3 from the surface of the fork 4. When the fork 4 is in place, the electromagnet 6.4 is de-energized and the spring 6.9 pushes the probe 6.3 to contact the brush plate 6.1. Among them, the probe bracket 6.6 refers to the moving part that carries the probe 6.3, which can be specifically formed by aluminum alloy profiles, and the axial displacement is achieved by the cooperation of the sliding sleeve and the slide bar 6.8, and its function is to provide a stable sliding path for the probe 6.3.

[0072] Among them, the electromagnet 6.4 refers to an electromagnetic element that generates a magnetic field when powered on. Specifically, a DC electromagnetic coil structure can be used. It is installed on the top of the probe bracket 6.6 and is used to lift the probe 6.3 by magnetically adsorbing the base 6.7 during the movement stage of the fork 4. The slide bar 6.8 refers to a guide component that supports the probe bracket 6.6. Specifically, an optical axis with a chrome-plated surface can be used. It cooperates with the linear bearing in the probe bracket 6.6 to ensure the vertical accuracy of the moving trajectory of the probe bracket 6.6. The spring 6.9 refers to an energy storage elastic element. Specifically, a cylindrical helical compression spring can be used. It is sleeved on the outside of the slide bar 6.8 and is used to provide a downward elastic thrust to reset the probe 6.3 when the electromagnet 6.4 is powered off.

[0073] Specifically, during the bidirectional movement of the forklift fork 4, the electromagnet 6.4 is energized to generate a magnetic suction force, causing the probe holder 6.6 to slide upward along the slide rod 6.8 against the resistance of the spring 6.9, and the probe 6.3 completely disengages from the surface of the forklift fork 4 to form a non-contact state. When the forklift fork 4 moves to the extreme right position, the left brush plate 6.1 aligns with the probe 6.3. At this time, the electromagnet 6.4 is de-energized, and the spring 6.9 pushes the probe holder 6.6 to slide along the slide rod 6.8, causing the probe 6.3 to contact the copper sheet of the brush plate 6.1, and the circuit of the right fork tip collision switch 6.5 is turned on. When the forklift fork 4 moves to the extreme left position, the right brush plate 6.1 aligns with the probe 6.3, and the probe 6.3 contacts the brush plate 6.1 under the action of the spring 6.9, and the circuit of the left fork tip collision switch 6.5 is turned on. This method ensures that only the collision switch on the corresponding side is activated when moving in place in different directions through the contact matching of the physical positions. Through the above technical solution, the present application realizes the controllable contact separation between the probe 6.3 and the surface of the forklift fork 4, avoids the wear problem caused by the friction between the probe 6.3 and the surface of the forklift fork 4 during the movement stage of the forklift fork 4, and ensures the accurate triggering of the circuit signal through elastic contact during the in-place stage. This device solves the technical defect of poor contact caused by the accumulation of wear of the traditional fixed probe, and at the same time eliminates the space occupation limitation of the rotary contact mechanism.

[0074] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A fork carriage system capable of two-way picking up goods, comprising: - A fork carriage (1) for connecting to a mast; - A hanging bracket (2) slidably arranged laterally on the fork carriage (1); - A sliding carriage (3) slidably arranged longitudinally on the hanging bracket (2); - Forks (4) arranged on the sliding carriage (3); It is characterized in that: - The forks (4) are slidably arranged laterally at the bottom of the sliding carriage (3); - A driving mechanism that drives the forks (4) to translate bidirectionally relative to the sliding carriage (3) to adjust the protruding position of the forks (4) relative to the sliding carriage (3), forming loading areas in different orientations; - A fixing device (5) for pressing the forks tightly to prevent displacement after the forks (4) move into place; - The sliding direction of the hanging bracket (2) is parallel to that of the forks (4), and the movement of the hanging bracket (2) is used to control the advance and retreat of the fork loading area.

2. The fork carriage system according to claim 1, characterized in that: - A lifting carriage (1.3) for connecting to the mast is arranged in the middle of the fork carriage (1); - A lateral sliding groove (1.4) and a second rack (1.5) are arranged on the surface of the fork carriage (1); - Rollers (2.1) embedded in the sliding groove (1.4) and a driving gear (2.2) meshing with the second rack (1.5) are arranged on the hanging bracket (2); - A hydraulic motor (2.3) controls the rotation of the driving gear (2.2) to drive the hanging bracket (2) to move laterally along the fork carriage (1); - A light axis (2.4) and a double-acting oil cylinder (2.5) in the front-rear direction are arranged on the hanging bracket (2); - The sliding carriage (3) is slidably assembled on the light axis (2.4) and connected to the output shaft of the double-acting oil cylinder (2.5); - The double-acting oil cylinder (2.5) controls the sliding of the sliding carriage (3) relative to the hanging bracket (2) to slide longitudinally through the telescopic movement of the output shaft.

3. The fork carriage system according to claim 1, characterized in that: - A fork base (4.2) is arranged at the bottom of the sliding carriage (3); - A sliding channel penetrating the opposite sides of the sliding carriage is constructed on the fork base (4.2); - The forks (4) are movably arranged in the fork base (4.2).

4. The fork carriage system according to claim 3, characterized in that: - A first rack (4.1) is welded on the forks (4); - The driving mechanism includes a translational driving component (4.3) arranged at the bottom of the sliding carriage (3) and an adjusting gear (4.4) meshing with the first rack (4.1); - The translational driving component (4.3) drives the first rack (4.1) to drive the forks (4) to translate bidirectionally relative to the sliding carriage (3).

5. The fork carriage system according to claim 1, characterized in that: - The fixing device (5) includes: - A pressing oil cylinder (5.1) and a pressing spring (5.2) fixed inside the sliding carriage (3); - A shaft rod (5.3) fixed on the piston rod of the pressing oil cylinder (5.1); - A shaft sleeve (5.4) axially movably sleeved on the lower end of the shaft rod (5.3); - The pressing spring (5.2) is sleeved on the shaft rod (5.3) above the shaft sleeve (5.4), and the two ends respectively press against the shaft rod (5.3) and the shaft sleeve (5.4); - When the piston rod of the pressing oil cylinder (5.1) presses down, the downward pressure is transmitted to the bushing (5.4) through the pressing spring (5.2), and the bushing (5.4) presses the forklift fork (4) to prevent overpressure damage.

6. The forklift fork frame system according to claim 5, characterized in that: - A pressing plate (5.5) is provided at the upper end of the shaft rod (5.3), and the upper end of the pressing spring (5.2) presses against the pressing plate (5.5); - A contact switch is provided inside the carriage (3), including an upper contact switch (5.6) and a lower contact switch (5.7); - When the piston rod drives the shaft rod (5.3) to move, the pressing plate (5.5) cooperates with the upper contact switch (5.6) to feedback the moving state of the forklift fork, and cooperates with the lower contact switch (5.7) to feedback the pressing state.

7. The forklift fork frame system according to claim 1, characterized in that: - Two sets of detection components (7) are provided on the carriage (3); - Feedback components (4.7) are provided at both ends of the forklift fork (4); - When the forklift fork (4) slides bidirectionally and horizontally, the two sets of detection components respectively detect the feedback components at both ends of the forklift fork to judge the extending direction and in-place state of the forklift fork.

8. The forklift fork frame system according to claim 1, characterized in that: - Two sets of collision sensing assemblies are provided on the forklift fork (4); - Each set of collision sensing assemblies includes a tip collision switch (6.5) provided at the end of the forklift fork for feedbacking the collision signal at the front end of the forklift fork; - The two sets of tip collision switches (6.5) respectively adapt to different loading areas formed by the bidirectional telescoping of the forklift fork.

9. The forklift fork frame system according to claim 8, characterized in that: - The collision sensing assembly further includes a brush plate (6.1) connected to the tip collision switch (6.5); - The brush plate (6.1) is installed at the other end of the forklift fork (4) away from the corresponding tip collision switch (6.5); - A wire harness connection device (6) is provided on the carriage (3), and its probe (6.3) can selectively contact the surface of the forklift fork; - When the forklift fork (4) moves to a position in any direction, the probe (6.3) contacts the copper sheet of the brush plate (6.1) to realize the circuit connection and collision feedback of the tip collision switch (6.5).

10. The forklift fork frame system according to claim 9, characterized in that: - The wire harness connection device (6) includes: - A probe bracket (6.6) for installing the probe (6.3); - An electromagnet (6.4) fixed on the probe bracket (6.6); - A base (6.7) corresponding to the electromagnet (6.4); - The probe bracket (6.6) is slidably arranged on the slide rod (6.8) of the base (6.7); - A spring (6.9) is sleeved on the slide rod (6.8) between the probe bracket (6.6) and the base (6.7); - When the forklift fork moves, the electromagnet (6.4) is energized to adsorb the base (6.7), so that the probe (6.3) is separated from the surface of the forklift fork; - When the forklift fork reaches the position, the electromagnet is powered off, and the spring (6.9) pushes the probe (6.3) to contact the brush plate (6.1).

Images