A type of balance lifting fork
By designing an angle adjustment component for the balanced lifting fork and a linkage structure for the tie rod and swing arm, the balance problem of the lifting fork when lifting goods at a height is solved, ensuring the stability and safety of the lifting process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG ZHILI MASCH TECH CO LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-31
AI Technical Summary
Existing lifting forks have poor balance when lifting goods at elevated positions, and are prone to shaking and swaying, making them unsuitable for goods requiring high balance.
A balanced lifting fork was designed. By adjusting the position of the lifting lugs through the linkage structure of the angle adjustment component, the tie rod and the swing arm, the center of gravity is adjusted to ensure the balance during lifting.
It achieves balance and safety during hoisting under different load conditions, avoiding shaking and swaying during the hoisting process.
Smart Images
Figure CN224577980U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lifting forks, and in particular to a balanced lifting fork. Background Technology
[0002] Currently, forklifts are typically used for loading and unloading goods placed on a horizontal surface or at a low distance from the ground. However, due to the limited vertical operation of forklifts, loading and unloading goods at a high distance from the ground often requires coordination with overhead cranes. The most common method is to wrap the goods with cloth ropes and then connect them to the hooks of the overhead crane for lifting. However, this method is prone to tearing the packaging layer of the goods under their own weight, limiting its applicability. Therefore, technicians developed lifting forks, which can be used for lifting by inserting the forks into the pallet at the bottom of the goods without affecting the packaging layer. However, the balance of the lifting forks is relatively poor, and they are prone to shaking and swaying during lifting, making them unsuitable for goods with high balance requirements. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a balanced lifting fork that is not only simple in structure and easy to operate, but also allows for adjustment of the center of gravity position according to the load of the goods during lifting, thereby improving the balance of the lifting fork.
[0004] To achieve the above objectives, this utility model proposes the following technical solution: a balanced lifting fork, comprising a fork frame, a swing arm, a pull rod, a lifting lug, and an angle adjustment assembly. The fork frame has fork feet below its front end face, a pivot lug on one side of its upper end face, and a raised swing arm mounting seat on the other side. One end of the swing arm is pivotally connected to the swing arm mounting seat. The upper end of the pull rod is assembled with the lifting lug and the other end of the swing arm via a pin. The lower end surface of the pull rod is threaded. The angle adjustment assembly includes a pull rod seat, a motor, an adjusting component, a first gear, a bearing, and a nut. The pull rod seat is assembled within the pivot lug. The motor is assembled on one side of the pull rod seat. The motor shaft passes through the pull rod seat and is fitted with the first gear. The lower end of the adjusting component, in conjunction with the bearing, is assembled on the other side of the pull rod seat and limited by a nut. The upper end of the adjusting component has an integrally formed second gear that meshes with the first gear. The motor drives the first gear to rotate, causing the second gear and the adjusting component to rotate synchronously. The lower end of the pull rod is inserted into the adjusting component and threadedly engaged with it.
[0005] Preferably, the swing arm has an H-shaped structure, with its lower end pivotally connected to the swing arm mounting seat via a pivot, and its upper end having a first through hole that extends laterally through it.
[0006] Preferably, the lifting lug is U-shaped, with horizontal sleeves integrally formed at both ends.
[0007] Preferably, the upper end of the pull rod is provided with a pivot joint, the pivot joint having a second through hole that extends laterally, and when the pivot joint, the lug and the swing arm are assembled, the second through hole, the transverse sleeve and the first through hole are arranged coaxially, and the pin is inserted into the first through hole, the transverse sleeve and the second through hole.
[0008] Preferably, the pull rod seat has a first mounting hole for assembling the adjustment component on one side and a second mounting hole for assembling the motor on the other side. At the same time, the two ends of the pull rod seat extend with rotating shafts, and the pull rod seat is pivotally connected to the pivot lug seat through the rotating shafts.
[0009] Preferably, the adjusting component is a sleeve structure with an internal thread on the inner wall, a second gear integrally formed on the upper end of the outer wall, a second external thread that mates with the nut at the lower end, and a smooth rod structure in the middle section.
[0010] Preferably, the upper surface of the fork is provided with a notch at the position corresponding to the pivot lug to accommodate the extended pull rod.
[0011] Compared with the prior art, the balanced lifting fork disclosed in this utility model has the following beneficial effects: by using the angle adjustment component in conjunction with the linkage structure of the pull rod and the swing arm, the center of gravity can be adjusted when different lifting loads are applied, ensuring the balance during lifting and guaranteeing the safety of lifting. Attached Figure Description
[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0013] Figure 1 This is the overall structure of the embodiment of the present utility model. Figure 1 ; Figure 2 This is the overall structure of the embodiment of the present utility model. Figure 2 ; Figure 3 This is the overall structure of the embodiment of the present utility model. Figure 3 ; Figure 4 This is a partial structural diagram of an embodiment of the present utility model; Figure 5 This is a cross-sectional view of the angle adjustment component in an embodiment of this utility model; Figure 6 This is a structural diagram of the pull rod seat in an embodiment of this utility model; Figure 7 This is a schematic diagram of the structure of the adjusting component in an embodiment of this utility model. Detailed Implementation
[0014] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0015] like Figures 1-3 As shown, the present invention discloses a balanced lifting fork, including a fork frame 1, a swing arm 2, a pull rod 3, a lifting lug 4, and an angle adjustment component 5. The fork frame has a fork foot 6 below the front end face, a pivot lug 7 on one side of the upper end face of the fork frame, and a raised swing arm mounting seat 8 on the other side. One end of the swing arm is pivotally connected to the swing arm mounting seat, and the other end is in a free state. The angle adjustment component is mounted on the pivot lug. The upper end of the pull rod is mounted to the lifting lug and the free end of the swing arm through a pin 9, which can realize the relative rotation of the three. The lower end of the pull rod passes through the angle adjustment component. The angle adjustment component adjusts the downward extension distance of the pull rod, thereby adjusting the angle of the swing arm, and thus adjusting the center of gravity position during lifting.
[0016] Specifically, the fork has a square structure with a certain counterweight. The fork's front end is used to support the bottom of the goods during lifting. The upper surface of the fork has a notch 11 corresponding to the pivot lug, which is used to accommodate the extended pull rod.
[0017] The swing arm has an H-shaped structure, with its lower end pivotally connected to the swing arm mounting seat, allowing the swing arm to rotate relative to the swing arm mounting seat. The upper end of the swing arm has a first through hole 21 that extends laterally. The lug is U-shaped, with transverse sleeves 41 integrally formed at both ends.
[0018] The upper end of the pull rod is provided with a pivot joint 31, and the lower end of the rod body surface is provided with a thread 32. The pivot joint has a second through hole 33 that extends laterally. When the pivot joint, the lug and the swing arm are assembled, the second through hole, the transverse sleeve and the first through hole are arranged coaxially, and then a pin is inserted. The assembled pivot joint, lug and swing arm can rotate flexibly.
[0019] The angle adjustment component structure is as follows: Figures 4-5 As shown, the assembly includes a pull rod seat 51, a motor 52, an adjusting component 53, a first gear 54, a bearing 55, and a nut 56. The pull rod seat is mounted within a pivot lug. The motor is mounted on one side of the pull rod seat. The motor shaft passes through the pull rod seat and is fitted with the first gear. The lower end of the adjusting component is fitted with a bearing within the pull rod seat and is limited from below by a nut. The upper end of the adjusting component has a second gear integrally formed therein, and the second gear meshes with the first gear. The motor drives the first gear to rotate, causing the second gear and the adjusting component to rotate synchronously. The lower end of the pull rod is inserted into the adjusting component, and the two components are threaded together. When the adjusting component rotates, the pull rod extends or retracts. (Same working principle as a ball screw) Specifically, the structure of the pull rod seat is as follows: Figure 6 As shown, the pull rod seat has a through first mounting hole 511 on one side and a second mounting hole 512 on the other side. At the same time, the two ends of the pull rod seat have rotating shafts 513 extending from them. The pivot connection between the pull rod seat and the pivot lug is realized through the rotating shafts. When the center of gravity is adjusted, the pull rod seat can rotate relative to the pivot lug. The first mounting hole is used to assemble the adjusting component. In order to facilitate the rotation of the adjusting component in the first mounting hole, a bearing is sleeved on its outside before it is installed in the first mounting hole. The second mounting hole is used to install the motor.
[0020] The specific structure of the adjusting component is as follows: Figure 7 As shown, it is a sleeve structure with an internal thread 531 on the inner wall that mates with the thread on the outer wall of the pull rod. The upper end of the outer wall is integrally formed with a second gear 532, and the lower end is provided with a second external thread 533 that mates with a nut 56. The middle section is a smooth rod, which is used to install the bearing and then insert it into the pull rod seat. When assembling the adjusting component, the bearing is first installed, and then it is inserted into the pull rod seat. The nut is then screwed in from below to limit the position and prevent the adjusting component from shifting up and down when rotating. The second gear meshes with the first gear at the end of the motor, so that the motor drives the adjusting component to rotate.
[0021] This utility model discloses a balanced lifting fork that adjusts the position of the lifting lugs by adjusting the extension distance of the pull rod, thereby adjusting the center of gravity of the lifting device. When unloaded, the pull rod is extended by a motor, at which time the angle between the swing arm and the horizontal plane is at its maximum, and the center of gravity of the lifting lug is located on the left side of the pivot lug seat (e.g., Figure 1 As shown), under light load, the lever is lowered via motor control. At this time, the angle between the swing arm and the horizontal plane decreases, and the center of gravity of the lifting lug shifts towards the fork foot side (as shown). Figure 2 As shown), until the hoisting is balanced, when heavily loaded, click the control lever to continue moving downwards, and the angle between the swing arm and the horizontal plane will continue to decrease, even reaching 0°. By controlling the length of the swing arm to be greater than the distance between the swing arm mounting base and the pivot lug base, the center of gravity of the lifting lug can be located on the right side of the pivot lug (as shown). Figure 3 (As shown), continue to maintain the lifting balance.
[0022] This invention utilizes an angle adjustment component in conjunction with a linkage structure of a tie rod and a swing arm to adjust the center of gravity when lifting different loads, ensuring balance during lifting and guaranteeing the safety of the lifting operation.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A balanced fork, characterized by: The device includes a fork, a swing arm, a tie rod, a lug, and an angle adjustment assembly. The fork has fork feet on the lower part of its front end face, a pivot lug on one side of its upper end face, and a raised swing arm mounting seat on the other side. One end of the swing arm is pivotally connected to the swing arm mounting seat. The upper end of the tie rod is assembled with the lug and the other end of the swing arm via a pin. The lower end of the tie rod has threads. The angle adjustment assembly includes a tie rod seat, a motor, an adjustment component, a first gear, a bearing, and a nut. The tie rod seat is assembled within the pivot lug. The motor is assembled on one side of the tie rod seat. The motor shaft passes through the tie rod seat and is fitted with the first gear. The lower end of the adjustment component is fitted with a bearing on the other side of the tie rod seat and is limited by a nut. The upper end of the adjustment component has a second gear integrally formed, and the second gear meshes with the first gear. The motor drives the first gear to rotate, causing the second gear and the adjustment component to rotate synchronously. The lower end of the tie rod is inserted into the adjustment component, and they are threaded together.
2. The balanced fork according to claim 1, characterized in that: The swing arm has an H-shaped structure, with its lower end pivotally connected to the swing arm mounting base via a pivot, and its upper end having a first through hole that extends laterally through it.
3. The balanced fork according to claim 2, characterized in that: The lifting lug is U-shaped, with horizontal sleeves integrally formed at both ends.
4. The balanced fork according to claim 3, characterized in that: The upper end of the pull rod is provided with a pivot joint, which has a second through hole that extends laterally. When the pivot joint, the lug and the swing arm are assembled, the second through hole, the transverse sleeve and the first through hole are arranged coaxially. The pin is inserted into the first through hole, the transverse sleeve and the second through hole.
5. The balanced fork according to claim 1, wherein: The pull rod seat has a first mounting hole for assembling the adjustment component on one side and a second mounting hole for assembling the motor on the other side. At the same time, the two ends of the pull rod seat extend with rotating shafts, which realize the pivot connection between the pull rod seat and the pivot lug seat.
6. The balanced fork according to claim 1, wherein: The adjusting component is a sleeve structure with an internal thread on the inner wall, a second gear integrally formed on the upper end of the outer wall, a second external thread that mates with the nut at the lower end, and a smooth rod structure in the middle section.
7. The balanced fork according to claim 1, wherein: The upper surface of the fork is provided with a notch at the position corresponding to the pivot lug to accommodate the extended pull rod.