A forklift truck arm assembly

Abstract

The utility model relates to a forklift arm support technical field, concretely relates to a forklift arm support assembly, including forklift body, the fixed mounting of forklift body has the lifting device, the working end of lifting device is fixedly connected with the goods shelf, the fixedly connected with the arm support body on goods shelf, the upper side of arm support body is slidably inserted with the fork, the side of fork away from arm support body rotatably connects with the abutting plate. Through drive abutting plate rotation when goods place in the upper side of fork of transmission mechanism, make abutting plate and goods adhere to extrude and form rigid horizontal limiting structure, can directly resist tangent direction inertia force that the goods produce when forklift turns, prevent goods from deviating to the outside of turning, solved when the forklift carries the super wide or super long goods turning, the goods will produce the inertia force along the tangent direction of turning because of the quality is bigger, no horizontal limiting structure, will cause goods to incline, the technical problem of directly sliding when serious.

Description

Technical Field

[0001] This utility model relates to the field of forklift arm technology, specifically to a forklift arm assembly. Background Technology

[0002] A tow arm is a structural component on a forklift used to support loads. An assembly refers to the assembly of the various parts of the tow arm into a complete component or assembly according to design requirements for use on a forklift. The tow arm is part of the forklift's hydraulic system; it connects the forks and the forklift body, effectively supporting the load carried by the forks. Tow arms are typically made of high-strength materials to withstand the various pressures encountered by the forklift during operation.

[0003] Chinese Patent Publication No. CN218620204U discloses a forklift support arm, including a mounting plate fixedly connected to the lifting mechanism of the forklift body. A horizontal plate is fixedly mounted on the mounting plate, and a horizontal groove is formed on the surface of the horizontal plate. Two sliders are slidably mounted in the groove, and each slider is fixedly connected to a first support arm. A first motor is fixedly mounted at the center of the horizontal plate, and the two sliders are located on both sides of the first motor. The output shaft of the first motor is set as the motor output shaft. The motor output shaft is connected to a threaded screw through a coupling. The threaded screw is engaged with a screw collar. Connecting rods are hinged to both sides of the screw collar, and the two connecting rods are respectively hinged to the sliders located on both sides. A second motor is installed inside the first support arm. A screw shaft is fixedly connected to the end of the output shaft of the second motor. The screw shaft is engaged with a second support arm, and the second support arm is located inside the first support arm.

[0004] The aforementioned column states that the forklift arm adjusts the spacing between the two first arms to accommodate the lateral dimensions of extra-wide goods. Simultaneously, the second arm extends from within the first arms, lengthening the overall arm length to meet the longitudinal load-bearing requirements of extra-long goods. However, when the forklift turns while handling extra-wide or extra-long goods, the large mass of the goods generates inertial forces along the turning tangent. Since the forklift arm only supports the goods through the bearing surfaces of the first and second arms, lacking a lateral restraint structure, the inertial forces easily cause the goods to shift outwards. If the shift exceeds the safe distance between the goods' center of gravity and the edge of the arm, it can cause the goods to tilt, and in severe cases, even slip off. Therefore, we propose a forklift arm assembly. Utility Model Content

[0005] To address the aforementioned issues, a forklift support arm assembly is provided. Through a transmission mechanism, when cargo is placed on the upper side of the forks, the abutment plate rotates, causing it to press against the cargo to form a rigid lateral limiting structure. This directly counteracts the tangential inertial force generated by the cargo when the forklift turns, preventing the cargo from shifting outwards. This solves the technical problem that when a forklift is handling oversized or overlength cargo, the cargo's large mass generates inertial force along the tangential direction of the turn, and without a lateral limiting structure, this can cause the cargo to tilt, or even slip off in severe cases.

[0006] To address the existing technical problems, this utility model provides a forklift boom assembly, including a forklift body, a lifting device fixedly mounted on the forklift body, a backrest fixedly connected to the working end of the lifting device, a boom body fixedly connected to the backrest, and forks slidably inserted into the upper side of the boom body; an abutment plate rotatably connected to the side of the forks away from the boom body; a transmission mechanism for driving the abutment plate to rotate between the forks and the abutment plate; and a drive mechanism for driving the forks to move between the boom body and the forks.

[0007] Preferably, the transmission mechanism includes a support plate and a guide assembly; the support plate is disposed on the side of the fork near the abutment plate; the guide assembly is disposed between the fork and the support plate, and the guide assembly is used to assist the support plate in achieving linear movement.

[0008] Preferably, the guide assembly includes a support rod, a through groove, and a first elastic reset member; the upper end of the support rod is fixedly connected to the lower side of the support plate; the through groove is opened on the side of the fork near the support rod, and the through groove is slidably engaged with the support rod; the first elastic reset member is sleeved on the lower end of the support rod, and the two sides of the first elastic reset member are fixedly connected to the fork and the support rod, respectively.

[0009] Preferably, the transmission mechanism further includes a toothed disc, a toothed plate, and a stop assembly; the toothed disc is fixedly connected to the abutment plate; the toothed plate is fixedly connected to the support plate, and the toothed plate meshes with the toothed disc; the stop assembly is disposed between the fork and the toothed disc, and the stop assembly is used to lock the position of the rotated toothed disc.

[0010] Preferably, the stop assembly includes a ratchet, a pawl, and a second resilient reset member; the ratchet is rotatably connected to the fork, and the ratchet shaft is fixedly connected to the toothed disc; the pawl is rotatably connected to the fork, the teeth of the pawl are embedded in the tooth grooves of the ratchet, and the pawl and ratchet are covered by a cover; the two ends of the second resilient reset member are fixedly connected to the cover and the pawl respectively, and an unlocking lever is installed on the outside of the cover, which is fixedly connected to the pawl.

[0011] Preferably, the drive mechanism includes a power component, a bevel gear assembly, and a screw; the power component is fixedly connected to the support arm body and is used to provide power for the displacement of the forks; the bevel gear assembly is rotatably mounted on the support arm body, and the working end of the bevel gear assembly is fixedly connected to the output end of the power component; the screw is rotatably mounted on the support arm body and is fixedly connected to the working end of the bevel gear assembly away from the power component.

[0012] Preferably, a groove is provided on the side of the support arm body near the screw, a slider is slidably disposed in the groove, the slider is threadedly connected to the screw, and the slider is fixedly connected to the lower side of the fork.

[0013] The advantages of this utility model compared to the prior art are:

[0014] 1. The transmission mechanism drives the abutment plate to rotate when the goods are placed on the upper side of the forks, so that the abutment plate and the goods are pressed together to form a rigid lateral limiting structure. This can directly counteract the tangential inertial force generated by the goods when the forklift turns, and prevent the goods from shifting to the outside of the turn. This solves the technical problem that when the forklift is carrying oversized or oversized goods and turns, the goods will generate inertial force along the tangential direction of the turn due to their large mass. Without a lateral limiting structure, the goods will tilt, and in severe cases, they will directly slip off.

[0015] 2. By driving the forks through the drive mechanism to press the pallet against the surface of the backrest, the stability of the pallet during handling is further improved. This solves the technical problem that when forklifts handle oversized, overlength, or center-of-gravity shifted goods, the single lateral limit of the contact plate is insufficient to completely counteract the imbalance force caused by longitudinal bumping displacement or center-of-gravity shift. Attached Figure Description

[0016] Figure 1 This utility model application provides a three-dimensional schematic diagram of the forklift body and the forklift body of a forklift arm assembly.

[0017] Figure 2 This utility model application presents a three-dimensional schematic diagram of the abutment plate and power component of a forklift boom assembly.

[0018] Figure 3 This is a three-dimensional schematic diagram of the abutment plate and support plate of a forklift arm assembly according to this utility model application.

[0019] Figure 4 yes Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 5 yes Figure 2 Enlarged diagram of point B in the middle.

[0021] Figure 6 yes Figure 3 Enlarged diagram of point C in the middle.

[0022] The following are the labels in the diagram: 1. Forklift body; 11. Lifting device; 12. Backrest rack; 13. Support arm body; 2. Forks; 21. Abutment plate; 22. Support plate; 23. Support rod; 24. Through groove; 25. First elastic reset component; 26. Toothed disc; 27. Toothed plate; 28. Ratchet; 29. ​​Pad; 210. Second elastic reset component; 211. Power component; 212. Bevel gear assembly; 213. Screw; 214. Slide groove; 215. Slider. Detailed Implementation

[0023] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0024] See Figures 1-3 As shown, a forklift boom assembly includes a forklift body 1, a lifting device 11 fixedly mounted on the forklift body 1, a backrest 12 fixedly connected to the working end of the lifting device 11, a boom body 13 fixedly connected to the backrest 12, and a fork 2 slidably inserted into the upper side of the boom body 13; an abutment plate 21 rotatably connected to the side of the fork 2 away from the boom body 13; a transmission mechanism for driving the abutment plate 21 to rotate is provided between the fork 2 and the abutment plate 21; and a drive mechanism for driving the fork 2 to move is provided between the boom body 13 and the fork 2.

[0025] Specifically, when the forklift body 1 is in operation, the forklift body 1 drives the support arm body 13 to insert into the underside of the cargo pallet, while simultaneously driving the abutment plate 21 to move out of the area under the cargo pallet. At this time, the lifting device 11 drives the backrest 12 to move upward synchronously with the support arm body 13, so that the transmission mechanism forms a squeezing contact with the bottom of the cargo pallet; this squeezing action triggers the transmission mechanism to rotate around a preset axis until the abutment plate 21 is pressed against the side of the cargo pallet.

[0026] By pressing the abutment plate 21 against the pallet, the tangential inertial force generated by the goods when the forklift turns can be directly countered, limiting the tendency of the goods to deviate to the outside of the turn. Even if the goods are heavy, the pressing force between the abutment plate 21 and the pallet can still control the amount of goods deviation within a safe threshold, preventing the goods from tilting or slipping.

[0027] Simultaneously, the drive mechanism drives the forks 2 to move linearly in the horizontal direction, causing the pallet to move closer to the backrest 12 until the side of the pallet away from the abutment plate 21 makes contact with the surface of the backrest 12. Through the dual constraint structure of the lateral compression of the abutment plate 21 and the reverse limiting of the backrest 12, the stability of the pallet during handling is further improved, making it suitable for complex operating conditions such as forklift turning and bumpy rides.

[0028] See Figures 4-6 As shown, the transmission mechanism includes a support plate 22 and a guide assembly; the support plate 22 is disposed on the side of the fork 2 near the abutment plate 21; the guide assembly is disposed between the fork 2 and the support plate 22, and the guide assembly is used to assist the support plate 22 in achieving linear movement; the guide assembly includes a support rod 23, a through groove 24 and a first elastic reset member 25; the upper end of the support rod 23 is fixedly connected to the lower side of the support plate 22; the through groove 24 is opened on the side of the fork 2 near the support rod 23, and the through groove 24 slides with the support rod 23; the first elastic reset member 25 is sleeved on the lower end of the support rod 23, and the two sides of the first elastic reset member 25 are fixedly connected to the fork 2 and the support rod 23 respectively; the transmission mechanism also includes a toothed disc 26, a toothed plate 27 and a stop assembly; the toothed disc 26 and the abutment plate 21 are fixedly connected to the support plate 21. 1. Fixed connection; the toothed plate 27 is fixedly connected to the support plate 22, and the toothed plate 27 meshes with the toothed disc 26; a stop assembly is disposed between the fork 2 and the toothed disc 26, and the stop assembly is used to lock the position of the rotated toothed disc 26; the stop assembly includes a ratchet 28, a pawl 29, and a second elastic reset member 210; the ratchet 28 is rotatably connected to the fork 2, and the shaft of the ratchet 28 is fixedly connected to the toothed disc 26; the pawl 29 is rotatably connected to the fork 2, and the teeth of the pawl 29 are embedded in the tooth groove of the ratchet 28, and the pawl 29 and the ratchet 28 are covered with a cover; the two ends of the second elastic reset member 210 are fixedly connected to the cover and the pawl 29 respectively, and an unlocking lever is installed on the outside of the cover, and the unlocking lever is fixedly connected to the pawl 29.

[0029] Specifically, the support rod 23 and the through groove 24 form a sliding guide pair. The first elastic reset member 25 and the second elastic reset member 210 are preferably springs.

[0030] When the contact plate 21 moves out of the area under the cargo pallet, the lifting device 11 drives the support arm body 13 to move upward. When the support plate 22 forms a pressing contact with the bottom of the cargo pallet, the support plate 22 is compressed and drives the support rod 23 to move axially downward along the through groove 24. Relying on the sliding guide pair formed by the support rod 23 and the through groove 24, the movement trajectory of the support rod 23 can be precisely limited to ensure that the support plate 22 moves downward smoothly, thereby driving the toothed plate 27 to move downward stably in a preset direction. During this process, the support rod 23 simultaneously stretches the first elastic reset member 25, causing it to undergo tensile deformation and store elastic potential energy.

[0031] Since the toothed plate 27 and the toothed disc 26 are meshed together, the downward movement of the toothed plate 27 is converted into the circumferential rotation of the toothed disc 26. The toothed disc 26 drives the abutment plate 21 to rotate synchronously until the abutment plate 21 is pressed against the surface of the cargo pallet. At the same time, the toothed disc 26 drives the ratchet 28 to rotate synchronously. The teeth of the ratchet 28 push the pawl 29 to displace, causing the second elastic reset member 210 to undergo tensile deformation. When the abutment plate 21 is pressed against the cargo pallet to a preset position and stops rotating, the toothed disc 26 and the ratchet 28 also stop rotating. Under the reset force of the second elastic reset member 210, the pawl 29 and the ratchet 28 form a locking pair through a plug-in engagement. This locking pair restricts the circumferential rotation of the ratchet 28 through a mechanical meshing structure, achieving unidirectional stopping after the ratchet 28 rotates, thereby preventing the toothed disc 26 from rotating loose due to vibration or external force, and ensuring that the toothed disc 26 drives the abutment plate 21 to stably maintain the pressing and limiting state on the cargo pallet.

[0032] When the cargo pallet is unloaded from the forks 2, the unlocking lever on the outside of the cover is manually activated. The driving force generated by the unlocking lever pushes the pawl 29 out of engagement with the ratchet 28, thus releasing the locking pair formed by the pawl 29 and the ratchet 28.

[0033] At this time, the first elastic reset member 25, which is in a state of tensile deformation, releases its elastic potential energy, generating an upward reset force and pushing the support rod 23 upward along the through groove 24; the support rod 23 simultaneously drives the support plate 22, which is fixedly connected to it, to move upward, and the support plate 22 further drives the toothed plate 27 to move upward along a preset direction. Since the toothed plate 27 and the toothed disc 26 remain engaged, the upward movement of the toothed plate 27 is converted into the reverse circumferential rotation of the toothed disc 26, and the toothed disc 26 drives the abutment plate 21 to rotate synchronously until the abutment plate 21 returns to its initial position, completing the mechanism reset after a single operation.

[0034] See Figures 1-3 As shown, the drive mechanism includes a power component 211, a bevel gear assembly 212, and a screw 213. The power component 211 is fixedly connected to the support arm body 13 and is used to provide power for the displacement of the forks 2. The bevel gear assembly 212 is rotatably mounted on the support arm body 13, and the working end of the bevel gear assembly 212 is fixedly connected to the output end of the power component 211. The screw 213 is rotatably mounted on the support arm body 13 and is fixedly connected to the working end of the bevel gear assembly 212 away from the power component 211. A slide groove 214 is provided on the side of the support arm body 13 near the screw 213, and a slider 215 is slidably mounted in the slide groove 214. The slider 215 is threadedly connected to the screw 213 and is fixedly connected to the lower side of the forks 2.

[0035] Specifically, the power component 211 is preferably a servo motor. The bevel gear assembly 212 consists of meshing bevel gears. One side of the bevel gear assembly 212 is fixedly connected to the output end of the power component 211, and the other side of the bevel gear assembly 212 away from the power component 211 is fixedly connected to the screw 213. The slide groove 214 and the slider 215 form a sliding guide pair.

[0036] When the abutment plate 21 forms a compression limit on the cargo pallet, the power unit 211 is activated. The output end of the power unit 211 drives the bevel gear of the bevel gear assembly 212, which is fixedly connected to it, to rotate. Through the meshing transmission relationship of the two bevel gears inside the bevel gear assembly 212, the rotational motion is transmitted to the bevel gear fixedly connected to the screw 213, driving the screw 213 to rotate around its axis.

[0037] Since the slide groove 214 and the slider 215 form a sliding guide pair, the circumferential rotation of the slider 215 is restricted, preventing the slider 215 from rotating synchronously with the screw 213. Simultaneously, the screw 213 and the slider 215 are threadedly connected, converting the rotational motion of the screw 213 into the linear sliding motion of the slider 215 along the slide groove 214, ensuring the slider 215 moves smoothly along the slide groove 214. During the movement of the slider 215, it synchronously drives the fork 2 to move linearly, thereby pushing the pallet on the fork 2 towards the backrest 12 until the pallet makes contact with the surface of the backrest 12, completing the bidirectional limiting of the pallet.

[0038] Working Principle: During the operation phase of the forklift body 1, the forklift body 1 drives the support arm body 13 to insert horizontally under the cargo pallet, while the abutment plate 21 moves out from the area under the cargo pallet. Subsequently, the lifting device 11 drives the support arm body 13 to move vertically. When the support plate 22 on the support arm body 13 forms a pressing contact with the bottom of the cargo pallet, the support plate 22 is compressed and displaced downwards, simultaneously driving the toothed plate 27 to move downwards. The downward movement of the toothed plate 27 is converted into the rotational movement of the toothed disc 26, which drives the abutment plate 21 to rotate synchronously, forming a lateral limit on the cargo pallet. The power unit 211 is activated, driving the screw 213 to rotate through the bevel gear assembly 212. This causes the slider 215 to move the forks 2 synchronously, thereby pushing the cargo pallet on the forks 2 closer to the backrest 12, ultimately making the cargo pallet form a pressing contact with the surface of the backrest 12, completing the bidirectional limiting and fixing of the cargo pallet.

[0039] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A forklift boom assembly, comprising a forklift body (1), a lifting device (11) fixedly mounted on the forklift body (1), a retaining rack (12) fixedly connected to the working end of the lifting device (11), and a boom body (13) fixedly connected to the retaining rack (12), characterized in that, Forks (2) are slidably inserted into the upper side of the support arm body (13); The fork (2) is rotatably connected to an abutment plate (21) on the side away from the support arm body (13); A transmission mechanism for driving the abutment plate (21) to rotate is provided between the forks (2) and the abutment plate (21); A drive mechanism for driving the forks (2) to achieve displacement is provided between the support arm body (13) and the forks (2).

2. The forklift boom assembly according to claim 1, characterized in that, The transmission mechanism includes a support plate (22) and a guide assembly; The support plate (22) is located on the side of the fork (2) near the abutment plate (21); The guide assembly is located between the forks (2) and the support plate (22) to assist the support plate (22) in achieving linear movement.

3. A forklift boom assembly according to claim 2, characterized in that, The guide assembly includes a support rod (23), a through slot (24), and a first elastic reset member (25); The upper end of the support rod (23) is fixedly connected to the lower side of the support plate (22); The through groove (24) is opened on the side of the fork (2) near the support rod (23), and the through groove (24) and the support rod (23) are in sliding fit; The first elastic reset member (25) is sleeved on the lower end of the support rod (23), and the two sides of the first elastic reset member (25) are fixedly connected to the fork (2) and the support rod (23) respectively.

4. A forklift boom assembly according to claim 1, characterized in that, The transmission mechanism also includes a gear disc (26), a gear plate (27), and a stop assembly; The gear disc (26) is fixedly connected to the abutment plate (21); The toothed plate (27) is fixedly connected to the support plate (22), and the toothed plate (27) meshes with the toothed disc (26); The stop assembly is located between the forks (2) and the toothed disc (26), and is used to lock the position of the rotated toothed disc (26).

5. A forklift boom assembly according to claim 4, characterized in that, The stop assembly includes a ratchet (28), a pawl (29), and a second resilient reset member (210); The ratchet (28) is rotatably connected to the fork (2), and the shaft of the ratchet (28) is fixedly connected to the toothed disc (26); The pawl (29) is rotatably connected to the fork (2), the teeth of the pawl (29) are embedded in the tooth groove of the ratchet (28), and the pawl (29) and the ratchet (28) are covered with a cover. The two ends of the second elastic reset member (210) are fixedly connected to the cover and the pawl (29) respectively. An unlocking lever is installed on the outside of the cover and is fixedly connected to the pawl (29).

6. A forklift boom assembly according to claim 1, characterized in that, The drive mechanism includes a power component (211), a bevel gear assembly (212), and a screw (213); The power unit (211) is fixedly connected to the support arm body (13), and the power unit (211) is used to provide power for the displacement of the forks (2); The bevel gear assembly (212) is rotatably mounted on the support arm body (13), and the working end of the bevel gear assembly (212) is fixedly connected to the output end of the power component (211); The screw (213) is rotatably mounted on the support arm body (13), and the screw (213) is fixedly connected to the working end of the bevel gear assembly (212) away from the power component (211).

7. A forklift boom assembly according to claim 6, characterized in that, The support arm body (13) has a groove (214) on the side near the screw (213). A slider (215) is slidably arranged in the groove (214). The slider (215) is threadedly connected to the screw (213) and fixedly connected to the lower side of the fork (2).

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