An electric transfer trolley with foldable lifting door frame
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUAINAN JUWAN IND CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-19
Smart Images
Figure CN224377596U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of transfer vehicle technology, and specifically relates to an electric transfer vehicle with a foldable lifting gantry. Background Technology
[0002] As core equipment in modern logistics warehousing, electric transfer vehicles directly impact cargo turnover efficiency through their space utilization and operational efficiency. Although various types of electric transfer equipment are available on the market, the stability of the folding mechanism and the precision of the lifting system remain key technical challenges that limit equipment performance improvement when dealing with confined working environments or dynamically adjusting fork height.
[0003] Traditional folding mechanisms often face a trade-off between functionality and portability in their design. Most products employ a hinged folding scheme. While this structure enables gantry folding, repeated opening and closing can lead to structural deformation due to metal fatigue, resulting in increased gaps at the joints. More significantly, the coordination of the movement trajectories of various components during folding is not fully resolved. When the gantry angle exceeds 60 degrees, sudden changes in gravity distribution often cause a shift in the equipment's center of gravity, posing a tipping safety hazard. These problems directly limit the maneuverability of transport vehicles in confined spaces such as warehouse aisles and elevator cars, hindering their ability to fully utilize their spatial adaptability advantages. These challenges have become urgent issues for manufacturers in the industry and require immediate solutions. Utility Model Content
[0004] This utility model addresses the shortcomings of existing technologies by providing an electric transfer vehicle with a foldable lifting gantry. The specific technical solution is as follows:
[0005] This utility model provides an electric transfer vehicle with a foldable lifting gantry, including a chassis with multiple wheels, a gantry supported at the front end, a fork arm supported on the front of the gantry for lifting and picking up goods, a limiting mechanism fitted on the gantry and attached to the outer periphery of the gantry, and the fork arm connected to the limiting mechanism, a lifting cylinder embedded in the gantry and connected to the limiting mechanism to pull the fork arm to move up and down, and a folding mechanism provided on the back of the gantry to drive the gantry to fold down.
[0006] As a preferred embodiment of this utility model, a front axle is inserted into the front end of the chassis, and a hinge ring that rotates with it is fitted on the front axle. The hinge ring is hinged to the bottom of the gantry for transmission and is used for tilting the gantry along the axis.
[0007] As a preferred technical solution of this utility model, the folding mechanism includes hinge supports symmetrically seated on the end face of the chassis, which are connected forward to a folding cylinder. The piston end of the folding cylinder is connected to both sides of the gantry, driving the gantry to fold down with the front axle as the fulcrum.
[0008] As a preferred technical solution of this utility model, the gantry includes an outer frame erected symmetrically on both sides, and a sliding inner frame embedded in each of the outer frames. A lifting cylinder is supported in the middle of the gantry and is connected to the inner frame to pull the inner frame to move vertically.
[0009] As a preferred technical solution of this utility model, the limiting mechanism includes multiple vertically arranged limiting beams attached to the front end of the gantry, and a connecting ring is provided thereafter to be sleeved and fixed to the inner upright, and moves up and down with the traction of the inner upright.
[0010] As a preferred technical solution of this utility model, an anti-detachment clamp is provided between the inner uprights, and its two sides are fastened to the outer periphery of the gantry for stable movement of the inner uprights.
[0011] As a preferred technical solution of this utility model, the limiting mechanism includes a load-bearing shaft disposed in the middle, on which symmetrically arranged fork arms are sleeved. The fork arms include an upper arm connected to the load-bearing shaft and a rotatable lower arm connected to its bottom end for folding and storing the fork arms.
[0012] The beneficial effects of this utility model are:
[0013] 1. Space Utilization Advantage: The gantry of this electric transfer vehicle can be folded down via a folding mechanism on the back. When not in operation or needing to pass through narrow spaces, folding the gantry significantly reduces the overall space occupied by the transfer vehicle. This design principle makes the transfer vehicle easier to store and move in space-constrained locations such as warehouses and workshops, preventing the vehicle from being unable to pass or be stored due to insufficient space, and greatly improving space utilization.
[0014] 2. Cargo Lifting Stability: A limiting mechanism fitted onto the mast is attached to the outer perimeter of the mast and connected to the fork arms. This limiting mechanism acts as a stable guide, ensuring the fork arms move vertically and stably along the mast when the lifting cylinder pulls the fork arms up and down. This principle guarantees that the fork arms will not wobble or shift during cargo lifting, making cargo lifting smoother and more precise, reducing the risk of cargo falling, and ensuring safe transport of goods.
[0015] 3. Flexible Lifting Function: The lifting cylinder embedded in the gantry is connected to the limit mechanism, and through the hydraulic drive principle, it can precisely control the up and down movement of the forklift. This hydraulic lifting method has a large power output and stable operating characteristics, which can easily meet the needs of picking up goods of different weights and heights. Whether lifting goods from a low place to a high place or placing goods from a high place to a low place, the operation can be completed quickly and efficiently, improving the efficiency of goods transfer.
[0016] In conclusion, this foldable electric transfer vehicle with lifting gantry, with its unique design and working principle, has significant benefits in terms of space utilization, cargo handling, lifting operation, and maintenance. Attached Figure Description
[0017] Figure 1 A schematic diagram of the overall structure of this utility model is shown;
[0018] Figure 2 A three-dimensional structural diagram of the present invention in its laid-down state is shown;
[0019] Figure 3 This invention presents a schematic diagram showing the combination of the gantry and the limiting mechanism.
[0020] Figure 4 This invention shows a schematic diagram of the combination of the limiting mechanism and the fork arm.
[0021] The diagram shows: 1. Chassis; 11. Traveling wheel; 12. Front axle; 13. Hinge ring; 2. Mast; 21. Outer frame; 22. Lifting cylinder; 23. Inner frame; 24. Anti-detachment clamp; 3. Folding mechanism; 31. Hinge support; 32. Folding cylinder; 33. Locking block; 4. Limiting mechanism; 41. Limiting beam; 42. Load-bearing shaft; 5. Fork arm; 51. Upper arm; 52. Lower arm. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0023] Example 1
[0024] To address the technical problems in the background section, the following electric transfer vehicle with a foldable lifting gantry is provided:
[0025] Combination Figure 1-3 As shown, a foldable electric transfer vehicle with lifting gantry 2 includes a chassis 1 supported by multiple travel wheels 11, a gantry 2 supported at its front end, a fork arm 5 supported on the front of the gantry 2 for lifting and picking up goods, a limiting mechanism 4 fitted on the gantry 2 and attached to the outer periphery of the gantry 2, and the fork arm 5 connected to the limiting mechanism 4, a lifting cylinder 22 embedded in the gantry 2 and connected to the limiting mechanism 4 to pull the fork arm 5 to move up and down, and a folding mechanism 3 provided on the back of the gantry 2 to drive the gantry 2 to fold down.
[0026] Please refer to the instruction manual appendix. Figure 1-3This utility model provides a first embodiment of a foldable electric transfer vehicle with a lifting gantry 2. In this embodiment, the transfer vehicle mainly consists of a chassis 1, a gantry 2, and a folding mechanism 3. The chassis 1 is equipped with multiple wheels 11 at its bottom to achieve mobility. The gantry 2 is vertically fixed to the front support surface of the chassis 1, and a fork arm 5 is provided laterally on its front area. The fork arm 5 is guided to lift and lower by a limiting mechanism 4 fitted around the outer periphery of the gantry 2. The limiting mechanism 4 is composed of a U-shaped frame, with its inner walls on both sides tightly attached to the uprights of the gantry 2, and forming a longitudinal sliding fit with the uprights of the gantry 2 through a sliding rail structure. The fixed end of the fork arm 5 is rigidly connected to the bottom of the limiting mechanism 4, so that the fork arm 5 can move synchronously with the limiting mechanism 4.
[0027] Preferably, the limiting mechanism 4 employs a slide rail structure comprised of two sets of guide grooves and pulleys. The guide grooves are opened along the length of the gantry 2 column, and the pulley sets are symmetrically installed inside the U-shaped frame of the limiting mechanism 4. This design effectively reduces sliding friction resistance and enhances operational stability through a three-point contact method. A lifting cylinder 22 is embedded in the hollow area inside the gantry 2, and its piston rod is connected to the top of the limiting mechanism 4 via a hinge. When the lifting cylinder 22 extends or retracts, it drives the limiting mechanism 4 to move axially along the gantry 2 column, thereby achieving vertical positioning adjustment of the fork arm 5.
[0028] Furthermore, a folding mechanism 3 is configured on the back of the gantry 2. This mechanism includes hydraulic push rods symmetrically arranged on both sides of the column, with each end of the push rods hinged to both sides of the crossbeam of the gantry 2. When the folding mechanism 3 is activated, the two sets of hydraulic push rods retract synchronously, causing the gantry 2 to tilt backward around the hinge point of the chassis 1, ensuring that the gantry 2 can be stably folded to a working state with an angle of 15 degrees to the plane of the chassis 1.
[0029] Example 2
[0030] Combination Figure 1-4 As shown, based on the above embodiments, this embodiment further provides the following:
[0031] In this embodiment, a front axle 12 is inserted at the front end of the chassis 1, and a hinge ring 13 that rotates with it is sleeved on it. The hinge ring 13 is hinged to the bottom of the gantry 2 for transmission and is used for tilting the gantry 2 along the axis.
[0032] The folding mechanism 3 includes hinge supports 31 symmetrically mounted on the end face of the chassis 1, which are connected forward to a folding cylinder 32. The piston end of the folding cylinder 32 is connected to both sides of the gantry 2, driving the gantry 2 to fold down with the front axle 12 as the fulcrum.
[0033] The limiting mechanism 4 includes a load-bearing shaft 42 located in its middle, on which symmetrically arranged fork arms 5 are sleeved. The fork arms 5 include an upper arm 51 connected to the load-bearing shaft 42, and a rotatable lower arm 52 connected to its bottom end for folding and storing the fork arms 5.
[0034] Please refer to the instruction manual appendix. Figure 1-4 This utility model provides a second embodiment of an electric transfer vehicle with a foldable lifting gantry 2. In this embodiment, a front axle 12 is inserted into the front end of the chassis 1, and a hinge ring 13 that can rotate with the axle is fitted on the front axle 12. The hinge ring 13 is hinged to the bottom of the gantry 2, which allows the gantry 2 to tilt around the front axle 12. When the transfer vehicle needs to adjust the angle of the gantry 2 in some special scenarios, the gantry 2 can rotate around the front axle 12 to adapt to different working requirements.
[0035] The folding mechanism 3 plays a crucial role in the folding process of the gantry 2. It includes hinge supports 31 symmetrically mounted on the end face of the chassis 1, with a folding cylinder 32 connected forward to each hinge support 31. The piston ends of the folding cylinder 32 are connected to both sides of the gantry 2. When the folding cylinder 32 is activated, the piston ends extend and retract. Since the piston ends are connected to both sides of the gantry 2, their extension and retraction drive the gantry 2 to fold down using the front axle 12 as a fulcrum. In this way, when the gantry 2 is not needed in the transport vehicle or when it is necessary to reduce the overall space occupied, the gantry 2 can be quickly folded into place.
[0036] Furthermore, the limiting mechanism 4 includes a load-bearing shaft 42 located in its center, on which symmetrically arranged fork arms 5 are mounted. Each fork arm 5 consists of an upper arm 51 and a lower arm 52. The upper arm 51 is connected to the load-bearing shaft 42, and the lower arm 52 is rotatably connected to the bottom end of the upper arm 51. This structure allows the fork arms 5 to be folded and stored when not in use. When goods need to be picked up, the fork arms 5 unfold, and through the limiting mechanism 4 and the lifting cylinder 22, the goods can be picked up and lifted. The entire electric transfer vehicle design, through the cooperation of its components, achieves the tilting and folding functions of the gantry 2 and the folding and storage functions of the fork arms 5, providing a flexible and practical solution for goods transfer operations.
[0037] Example 3
[0038] Combination Figure 1-4 As shown, based on the above embodiments, this embodiment further provides the following:
[0039] In this embodiment, the gantry 2 includes an outer frame 21 erected symmetrically on both sides, and an inner frame 23 that can be slidably embedded in it. A lifting cylinder 22 is supported in the middle of the gantry 2 and is in contact with the inner frame 23 to pull the inner frame 23 to move vertically.
[0040] Anti-detachment clips 24 are provided between the inner uprights 23, and their two sides are fastened to the outer periphery of the gantry 2 for stable movement of the inner uprights 23.
[0041] The limiting mechanism 4 includes multiple vertically arranged limiting beams 41 attached to the front end of the gantry 2, and a connecting ring is provided thereafter to be sleeved and fixed to the inner upright 23, and moves up and down with the traction of the inner upright 23.
[0042] Please refer to the instruction manual appendix. Figure 1-4 This utility model provides a third embodiment of a lifting and limiting device for a gantry 2. In this embodiment, the gantry 2 is composed of outer frames 21 symmetrically erected on both sides, with a slidable inner frame 23 embedded inside the outer frames 21, forming a nested structure. A lifting cylinder 22 is provided in the middle of the gantry 2, and the end of the lifting cylinder 22 is fixedly connected to the top of the inner frame 23. When the lifting cylinder 22 is activated, the extension and retraction of its piston rod directly acts on the inner frame 23, pulling the inner frame 23 to slide longitudinally along the interior of the outer frames 21, thereby realizing the lifting function of the gantry 2. Through the sliding cooperation between the outer frames 21 and the inner frames 23, the height of the gantry 2 can be flexibly adjusted according to actual operating requirements.
[0043] To ensure the stability of the inner frame 23 during sliding, anti-detachment clips 24 are installed between the two sets of inner frames 23. The left and right sides of these anti-detachment clips 24 are fastened and locked to the outer wall of the outer frame 21, forming a lateral constraint mechanism. When the inner frame 23 slides up and down within the outer frame 21, the anti-detachment clips 24 remain fixedly connected to the outer frame 21, preventing lateral swaying of the inner frame 23 due to force displacement and providing axial guidance for longitudinal sliding. This structure doubles the restriction on the movement trajectory of the inner frame 23—longitudinal positioning by the sliding nested structure and lateral constraint by the anti-detachment clips 24.
[0044] The limiting mechanism 4 is linked to the lifting system of the gantry 2. Its main body includes a set of limiting beams 41 arranged vertically along the front end of the gantry 2. The limiting beams 41 are rigid strip structures, longitudinally attached to the front surface of the gantry 2 at equal intervals, forming a rigidly fixed safety frame. An integrally formed connecting ring is located behind the limiting mechanism 4, which is fixed to the main frame of the inner upright 23 via a sleeve connection. When the lifting cylinder 22 drives the inner upright 23 to move up and down, the connecting ring drives the entire limiting mechanism 4 to move synchronously. This linkage design ensures that the vertical position of the limiting mechanism 4 always matches the stroke of the inner upright 23, and the actuators such as the fork arm 5 can be positioned at a fixed point through the limiting beams 41. For example, during cargo picking operations, the lifting cylinder 22 pushes the inner upright 23 upwards, the connecting ring lifts the limiting mechanism 4 to a preset height, and the actuators are longitudinally locked at specific positions on the limiting beams 41, thereby precisely controlling the lifting range of the forks. The entire device, through the coordinated operation of the nested gantry 2, the anti-detachment constraint ring, and the linkage limit mechanism 4, constructs an adaptive lifting and positioning system.
[0045] Working principle and usage process of this utility model:
[0046] Gantry 2 unfolds: The folding cylinder 32 on the end face of the chassis 1 is activated, and the piston end pushes the gantry 2 to unfold with the front axle 12 as the fulcrum. The hinge ring 13 on the front axle 12 rotates accordingly, and the auxiliary gantry 2 tilts along the axle to an upright position.
[0047] Fork arm 5 positioning: The lifting cylinder 22 is connected to the inner upright 23 of the gantry 2, pulling it to slide vertically along the outer upright 21. The limiting mechanism 4 is linked with the inner upright 23 through the connecting ring, driving the front limiting beam 41 and the fork arm 5 to rise and fall synchronously; at the same time, the anti-detachment clamp 24 is fastened to the outer periphery of the gantry 2, limiting the movement and deviation of the inner upright 23.
[0048] Fork operation: Rotate the lower arm 52 of fork arm 5 to adjust the fork lifting angle. The upper arm 51 and lower arm 52 on the load-bearing shaft 42 form a support structure to lift the goods. The lifting cylinder 22 can finely adjust the height of fork arm 5 as needed.
[0049] Cargo transfer: The vehicle is driven to move by the chassis 1 and the travel wheels 11. The anti-detachment clamp 24 and the limiting beam 41 ensure the stability of the inner frame 23 and the fork arm 5 during transportation.
[0050] Equipment storage: The folding cylinder 32 retracts, driving the gantry 2 to slowly fall down with the front axle 12 as the fulcrum; the lower arm 52 of the fork arm 5 rotates synchronously to the folded state, completing the overall folding.
[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A foldable electric transfer vehicle with a lifting gantry (2), comprising a chassis (1) supported by multiple travel wheels (11), a gantry (2) supported at its front end, and a fork arm (5) supported on the front of the gantry (2) for lifting and forking goods, characterized in that: A limiting mechanism (4) is fitted on the gantry (2), which is attached to the outer periphery of the gantry (2) and connected to the fork arm (5). A lifting cylinder (22) is embedded in the gantry (2), which is connected to the limiting mechanism (4) to pull the fork arm (5) to move up and down. A folding mechanism (3) is provided on the back of the gantry (2) to drive the gantry (2) to fold down.
2. The foldable electric transfer vehicle with lifting gantry (2) according to claim 1, characterized in that: The front axle (12) is inserted into the front end of the chassis (1), and a hinge ring (13) is fitted on it. The hinge ring (13) is hinged to the bottom of the gantry (2) for the gantry (2) to tilt along the axis.
3. The foldable electric transfer vehicle with lifting gantry (2) according to claim 2, characterized in that: The folding mechanism (3) includes a hinge support (31) symmetrically seated on the end face of the chassis (1), which is connected to a folding cylinder (32) in the front. The piston end of the folding cylinder (32) is connected to both sides of the gantry (2) respectively, driving the gantry (2) to fold down with the front axle (12) as the fulcrum.
4. The foldable electric transfer vehicle with lifting gantry (2) according to claim 3, characterized in that: The gantry (2) includes an outer frame (21) erected symmetrically on both sides, and an inner frame (23) that can be slidably embedded in it. A lifting cylinder (22) is supported in the middle of the gantry (2) and is connected to the inner frame (23) to pull the inner frame (23) to move vertically.
5. The foldable electric transfer vehicle with lifting gantry (2) according to claim 4, characterized in that: The limiting mechanism (4) includes multiple vertically arranged limiting beams (41) attached to the front end of the gantry (2), and a connecting ring is provided behind it to be sleeved and fixed to the inner upright (23), and moves up and down with the pull of the inner upright (23).
6. The foldable electric transfer vehicle with lifting gantry (2) according to claim 5, characterized in that: The inner uprights (23) are provided with anti-detachment clips, which are fastened to the outer periphery of the gantry (2) on both sides for stable movement of the inner uprights (23).
7. A foldable electric transfer vehicle with lifting gantry (2) according to any one of claims 1-6, characterized in that: The limiting mechanism (4) includes a load-bearing shaft (42) located in the middle, on which symmetrically arranged fork arms (5) are sleeved. The fork arms (5) include an upper arm (51) connected to the load-bearing shaft (42) and a rotatable lower arm (52) connected to its bottom end for folding and storing the fork arms (5).