Artificial push-pull metal product material handling vehicle

Abstract

The present application relates to the field of material handling vehicle, specifically relates to a manual push-pull type metal product material handling vehicle, including the handling vehicle support, the top of the handling vehicle support One side is fixed with a support plate, the inner wall of the support plate is fixed with a plurality of placement mechanisms along the vertical direction; The top of each placement mechanism is slidably connected with an adjusting mechanism, the top of the placement mechanism is also slidably connected with a plurality of limiting mechanisms, the limiting mechanism is connected with an adjustable support member, the side wall of the handling vehicle support is connected with a transmission mechanism, the beneficial effects of the present application are: the first support rod on the placement mechanism can drive the second support rod to realize telescopic adjustment, adapt to different length metal materials, the sliding support rod of the limiting mechanism is fixed with the second support rod through the buckle, forming horizontal limiting, cooperating with the universal joint structure of the adjustable support member, realizing flexible constraint of material, the anti-shaking ability is improved in the transportation process.

Description

Technical Field

[0001] This invention belongs to the field of material handling vehicles, and specifically relates to a manually pushed-pull type metal product material handling vehicle. Background Technology

[0002] In modern metal product manufacturing, warehousing, and logistics, the efficiency and reliability of material handling equipment directly impact production efficiency and cost control. Due to their irregular shapes and easily damaged surfaces, metal products place stringent demands on the adaptability, stability, and protective functions of handling equipment. However, current manual push-pull pallet trucks have problems in practical applications and struggle to meet the industry's needs for refined operations.

[0003] Most existing metal product handling vehicles adopt a single load-bearing platform design, lacking layered storage and height adjustment functions. For example, traditional flatbed handling vehicles can only stack materials on the same plane. For transporting multi-layer metal sheets, manual stacking is required, which is not only inefficient but also poses a risk of material slippage and deformation. On the other hand, some handling vehicles with fixed shelves are difficult to adapt to metal products of different sizes, resulting in insufficient space utilization. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing metal product handling vehicles in the background art, which are designed with a single load-bearing platform and cannot take into account both layered storage and height adjustment, resulting in low transportation efficiency and easy damage of multi-layer metal sheets, and fixed shelves are difficult to adapt to materials of different volumes, resulting in low space utilization. Therefore, this invention realizes a manual push-pull type metal product material handling vehicle.

[0005] To achieve the above-mentioned objectives, the technical solution of the present invention is: a manual push-pull type metal product material handling vehicle, including a handling vehicle bracket, a support plate fixed on one side of the top of the handling vehicle bracket, and multiple placement mechanisms fixed at intervals along the vertical direction on the inner wall of the support plate;

[0006] Each of the placement mechanisms is slidably connected to an adjustment mechanism at its top, and the top of the placement mechanism is also slidably connected to multiple limiting mechanisms, with adjustable support members snapped onto the limiting mechanisms.

[0007] The transport vehicle bracket has a transmission mechanism connected to one side wall and a lifting plate slidably connected to the other side wall. The lifting plate is connected to the transmission mechanism.

[0008] In the aforementioned manual push-pull type metal product material handling vehicle, the bottom of the handling vehicle frame is symmetrically connected with multiple rollers, and the rollers are universal wheels with self-locking function.

[0009] In the aforementioned manual push-pull type metal product material handling vehicle, the transmission mechanism includes a guide wheel, a rocker arm, and a transmission cylinder. The rocker arm is rotatably connected to the side wall of the handling vehicle bracket, and a transmission helical gear is fixed at one end of the rocker arm.

[0010] The transmission cylinder is rotatably connected to the side wall of the transport vehicle bracket. One end of the transmission cylinder is fixed with a driven helical gear that meshes with the transmission helical gear. The side wall of the driven helical gear is provided with several through holes arranged in a circumferential array. A plug-in bolt that matches one of the through holes is inserted into the transport vehicle bracket.

[0011] The outer surface of the transmission cylinder is wound with a transmission belt, the guide wheel is rotatably connected to the top of the transport vehicle bracket, and one end of the transmission belt passes around the guide wheel and is fixedly connected to the top of the lifting plate.

[0012] In the aforementioned manual push-pull metal product material handling vehicle, a sliding rod is symmetrically fixed on one side of the handling vehicle bracket, and two sets of pulleys are symmetrically rotatably connected on both sides of the lifting plate. Each set of pulleys includes four wheel sets, two of which are slidably connected to one side wall of the sliding rod, and the other two wheel sets are slidably connected to the other side wall of the sliding rod. The four wheel sets are clamped on the sliding rod and move.

[0013] In the aforementioned manual push-pull type metal product material handling vehicle, the placement mechanism includes two fixed plates symmetrically fixed to the inner wall of the support plate, and a bearing is fixed to the top of each fixed plate, with both ends of the rotating shaft extending into the bearing.

[0014] A rotating plate is fixed to the outer surface of one end of the rotating shaft. A limiting plate is fixed to one of the fixed plates. The limiting plate has a groove for the rotating plate to rotate. A limiting bolt is threaded to one side of the limiting plate. One end of the limiting bolt abuts against the rotating plate.

[0015] The bottom of the rotating shaft is fixed with several first support rods, and the two ends of the first support rods are slidably connected to second support rods.

[0016] In the aforementioned manual push-pull type metal product material handling vehicle, the limiting mechanism includes a sliding support rod and a snap-fit ​​plate. The side wall of the sliding support rod is provided with a buckle, and the top of the second support rod is provided with a sliding groove that matches the buckle.

[0017] The inner wall of the sliding support rod is rotatably connected to a rotating plate via a threaded column. A snap-fit ​​plate is fixed to one side of the rotating plate. Arc-shaped grooves are respectively opened at both ends of the snap-fit ​​plate, one of which is located at the top end of the snap-fit ​​plate and the other is located at the bottom end of the snap-fit ​​plate.

[0018] In the aforementioned manually pushed-pull metal product material handling vehicle, the adjustable support includes two limiting rods and several placement rods. The two ends of the placement rods are connected to the limiting rods through universal joints, and a stop bar is fixed on one side of each limiting rod.

[0019] In the aforementioned manual push-pull type metal product material handling vehicle, the adjustment mechanism includes a fixed block, a rotating disk, and a connecting rod fixed to one side of the rotating shaft. The rotating disk is rotatably connected to the top of the fixed block. Both ends of the connecting rod are fixed with baffles. The top of the baffles is provided with a stop block. A scale indicator arrow is fixed to one side of the fixed block.

[0020] Compared with the prior art, the manual push-pull type metal product material handling cart of the present invention has at least the following beneficial effects:

[0021] The manual push-pull metal product material handling vehicle of the present invention has a first support rod on the placement mechanism that can drive the second support rod to achieve telescopic adjustment to adapt to metal materials of different lengths. The sliding support rod of the limiting mechanism is fixed to the second support rod by a buckle to form a lateral limit. With the universal joint structure of the adjustable support component, the material is flexibly constrained, and the anti-shaking ability is improved during transportation.

[0022] The rotating disc and connecting rod of the adjustment mechanism achieve precise fine-tuning through the scale indicator arrows, and the drive baffle and stop apply torque to the edge placement rod, causing the limit rod of the adjustable support to shift at an angle.

[0023] The locking plate of the limiting mechanism forms a double-point rapid contact with the limiting rod through the arc grooves at the top and bottom. When the material is transferred from the lifting plate to the placement rod, the arc groove automatically adapts to the angle of the limiting rod to prevent slippage.

[0024] The placement mechanism is arranged in layers along the inner wall of the support plate. Each layer of the placement mechanism is rotatably connected to the support plate via a rotating shaft, and its tilt angle can be adjusted independently. When the lifting plate is raised to the target height by the transmission mechanism, its top surface height is precisely aligned with the top height of the second support rod of the corresponding layer of the placement mechanism. The operator can directly push the material on the lifting plate horizontally to the placement rod of the same height, avoiding the height difference problem that traditional handling vehicles require manual lifting. The use of a multi-layer placement mechanism increases space utilization. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the third overall structure of the present invention;

[0028] Figure 4 This is a side view of the structure of the present invention;

[0029] Figure 5 This is a front view schematic diagram of the transmission mechanism of the present invention;

[0030] Figure 6 This is a partial sectional view of the transmission mechanism of the present invention;

[0031] Figure 7 This is a front view schematic diagram of the placement mechanism of the present invention;

[0032] Figure 8 This is a partially enlarged structural schematic diagram of Figure A of the present invention;

[0033] Figure 9 This is a schematic diagram of the installation position of the limiting mechanism of the present invention;

[0034] Figure 10 This is a partially enlarged structural schematic diagram of Figure B of the present invention;

[0035] Figure 11 This is a front view schematic diagram of the adjustable support member of the present invention;

[0036] Figure 12 This is a schematic diagram of the adjustable support member of the present invention;

[0037] Figure 13 This is a schematic diagram of the main structure of the adjustment mechanism of the present invention.

[0038] In the picture: 1. Transport vehicle frame; 2. Rollers; 3. Lifting platform;

[0039] 4. Transmission mechanism; 401. Slide rod; 402. Pulley; 403. Guide wheel; 404. Rocker arm; 405. Transmission cylinder; 406. Driven helical gear; 407. Transmission belt; 408. Through hole;

[0040] 5. Support plate;

[0041] 6. Placement mechanism; 601. Fixing plate; 602. Rotating shaft; 603. First support rod; 604. Second support rod; 605. Limiting snap plate; 606. Limiting bolt; 607. Bearing; 608. Rotating plate;

[0042] 7. Limiting mechanism; 701. Sliding support rod; 702. Buckle; 703. Rotating plate; 704. Snap-fit ​​plate;

[0043] 8. Adjustable support component; 801. Limiting rod; 802. Placement rod; 803. Universal joint; 804. Stop bar;

[0044] 9. Adjustment mechanism; 901. Rotating disc; 902. Fixed block; 903. Connecting rod; 904. Baffle; 905. Stop block; 906. Scale indicator arrow. Detailed Implementation

[0045] The manual push-pull metal product material handling vehicle of the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0046] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] This embodiment discloses a manually pushed-pull type metal product material handling vehicle. Existing metal product handling vehicles, due to their single-platform design, cannot simultaneously accommodate layered storage and height adjustment, resulting in low transportation efficiency and easy damage to multi-layered metal sheets. Fixed shelves are also difficult to adapt to materials of different volumes, leading to low space utilization. Referring to… Figure 1-13 The system mainly includes a transport vehicle bracket 1. A support plate 5 is fixed to one side of the top of the transport vehicle bracket 1. Multiple placement mechanisms 6 are fixed at intervals along the vertical direction on the inner wall of the support plate 5. An adjustment mechanism 9 is slidably connected to the top of each placement mechanism 6. Multiple limiting mechanisms 7 are also slidably connected to the top of the placement mechanism 6. Adjustable support members 8 are engaged on the limiting mechanisms 7. A transmission mechanism 4 is connected to one side wall of the transport vehicle bracket 1, and a lifting plate 3 is slidably connected to the other side wall. The lifting plate 3 is connected to the transmission mechanism 4.

[0048] Support plate 5: Multiple placement mechanisms 6 are set in layers along the vertical direction on the inner wall to form a multi-level load-bearing space to meet the layered storage needs of materials of different heights.

[0049] Placement mechanism 6: The top is slidably connected to the adjustment mechanism 9 and multiple limiting mechanisms 7 via slide rails, so as to realize flexible adjustment in the horizontal direction and lateral constraint function.

[0050] Adjustment mechanism 9: can slide along the slide rail of the placement mechanism 6 to dynamically adjust the support state and adapt to the clamping requirements of different materials.

[0051] Limiting mechanism 7: Independently slides on the top of the placement mechanism 6, and is fixed to the adjustable support 8 by a snap-fit ​​structure to precisely limit the edge of the material.

[0052] Adjustable support 8: It is snapped onto the limiting mechanism 7 and can be freely disassembled and reassembled to flexibly adapt to metal materials of different shapes and sizes.

[0053] Transmission mechanism 4: Connected to one side wall of the transport vehicle bracket 1, and driven by the lifting plate 3 to slide vertically along the other side wall of the bracket, so as to achieve precise adjustment in the height direction.

[0054] Lifting plate 3: It achieves smooth lifting and lowering through the transmission mechanism 4, and works in conjunction with the placement mechanism 6 to form a complete material carrying and transportation system.

[0055] The bottom of the transport vehicle bracket 1 is symmetrically connected with multiple rollers 2, which are omnidirectional wheels with self-locking function.

[0056] 2. The casters are symmetrically arranged at the bottom of the transport vehicle bracket 1. They have 360° turning and self-locking functions to ensure the stability of the equipment's movement and the safety of its operation under complex working conditions.

[0057] Reference Figure 1-13 The transmission mechanism 4 includes a guide wheel 403, a rocker arm 404, and a transmission cylinder 405. The rocker arm 404 is rotatably connected to the side wall of the transport vehicle support 1, and a transmission helical gear is fixed to one end of the rocker arm 404. The transmission cylinder 405 is rotatably connected to the side wall of the transport vehicle support 1, and a driven helical gear 406 that meshes with the transmission helical gear is fixed to one end of the transmission cylinder 405. Several through holes 408 are arranged in a circumferential array on the side wall of the driven helical gear 406, and a plug that matches one of the through holes 408 is inserted into the transport vehicle support 1. A transmission belt 407 is wound around the outer surface of the transmission cylinder 405. The guide wheel 403 is rotatably connected to the top of the transport vehicle support 1, and one end of the transmission belt 407 passes around the guide wheel 403 and is fixedly connected to the top of the lifting plate 3.

[0058] A sliding rod 401 is symmetrically fixed on one side of the transport vehicle bracket 1, and two sets of pulleys 402 are symmetrically rotatably connected on both sides of the lifting plate 3. Each set of pulleys 402 includes four wheel sets, two of which are slidably connected to one side wall of the sliding rod 401, and the other two wheel sets are slidably connected to the other side wall of the sliding rod 401. The four wheel sets are clamped on the sliding rod 401 and move.

[0059] The transmission mechanism 4 transmits torque through helical gear meshing. The rotational motion of the rocker arm 404 is converted into the synchronous rotation of the driven helical gear 406 via the transmission helical gear, driving the transmission cylinder 405 to rotate around its axis to control the winding and unwinding of the transmission belt 407. The circumferentially distributed through holes 408 and the plugs form a gear locking system. By engaging the plugs with different through holes 408, the rotation angle of the transmission cylinder 405 can be precisely positioned, enabling graded height adjustment of the lifting plate 3. The guide wheel 403 adopts a low-friction rolling design to ensure that the transmission belt 407 remains taut during direction changes, effectively avoiding power loss caused by belt slack.

[0060] The lifting plate 3 achieves sliding engagement with the slide rod 401 through four symmetrically distributed pulleys 402. Each pulley group adopts a double-wheel clamping structure, with the inner and outer wheel groups contacting the two sides of the slide rod 401 respectively, forming a four-point support mechanical structure. This layout not only disperses the load-bearing pressure of the lifting plate 3, but also significantly improves the smoothness of vertical movement by replacing sliding friction with rolling friction between the wheel groups. The groove surface of the pulleys 402 is hardened, which effectively resists wear and deformation during long-term use while maintaining rotational flexibility, ensuring the stability and durability of the device operation.

[0061] Reference Figure 1-13 The placement mechanism 6 includes two fixed plates 601 symmetrically fixed to the inner wall of the support plate 5. Each fixed plate 601 has a bearing 607 fixed to its top. The two ends of the rotating shaft 602 extend into the bearing 607. A rotating piece 608 is fixed to the outer surface of one end of the rotating shaft 602. A limiting plate 605 is fixed on one of the fixed plates 601. The limiting plate 605 has a groove for the rotating piece 608 to rotate. A limiting bolt 606 is threaded to one side of the limiting plate 605. One end of the limiting bolt 606 abuts against the rotating piece 608. Several first support rods 603 are fixed to the bottom of the rotating shaft 602. Second support rods 604 are slidably connected to the two ends of the first support rods 603.

[0062] The placement mechanism 6 forms a symmetrical support structure through double fixing plates 601, which are embedded and fixed to the inner wall of the support plate 5 to ensure overall load-bearing stability. The rotating shaft 602 achieves low-friction rotational support through bearings 607. The rotating plate 608 at its shaft end forms a limited trajectory within the arc-shaped groove of the limiting locking plate 605. Combined with the end-face abutment pressure adjustment of the limiting bolt 606, the locking torque of the rotating shaft 602 can be precisely controlled, achieving stepless adjustment of the support surface angle. The first support rod 603 and the second support rod 604 adopt a nested sliding design, achieving length adjustment through a bidirectional locking structure. This graded telescopic design can adapt to the loading requirements of materials of different specifications and maintain structural stability through frictional self-locking during transportation, forming a dynamically adjustable support frame system.

[0063] Reference Figure 1-13The limiting mechanism 7 includes a sliding support rod 701 and a snap-fit ​​plate 704. The side wall of the sliding support rod 701 is provided with a snap-fit ​​702. The top of the second support rod 604 has a groove adapted to the snap-fit ​​702. The inner side wall of the sliding support rod 701 is rotatably connected to a rotating plate 703 via a threaded post. A snap-fit ​​plate 704 is fixed to one side of the rotating plate 703. Arc-shaped grooves are respectively opened at both ends of the snap-fit ​​plate 704, one arc-shaped groove located at the top end of the snap-fit ​​plate 704, and the other arc-shaped groove located at the bottom end of the snap-fit ​​plate 704. The adjustable support member 8 includes two limiting rods 801 and several placement rods 802. The two ends of the placement rods 802 are connected to the limiting rods 801 via universal joints 803. A stop bar 804 is fixed to one side of each limiting rod 801.

[0064] The limiting mechanism 7 forms an adjustable support node along the axial direction of the support rod by using a sliding support rod 701 and a second support rod 604 with a grooved engagement design. The rotating plate 703 adopts an eccentric threaded column structure, and its rotational movement can drive the engagement plate 704 to produce translational displacement. Combined with the staggered distribution of the double-ended arc-shaped grooves, it achieves bidirectional clamping constraint on the limiting rod 801. This design not only allows for rapid adjustment of the clamping position but also maintains stable clamping pressure through the self-locking characteristics of the threads.

[0065] The adjustable support component 8 uses a double limiting rod 801 as its load-bearing base, and the placement rod 802 connected by the universal joint 803 can form an adaptive angle adjustment surface. The stop bar 804 and the arc-shaped groove of the cooperating limiting mechanism 7 constrain the entire support system, enabling flexible fixing of materials of different specifications and shapes, significantly improving space utilization while maintaining loading stability.

[0066] Reference Figure 1-13 The adjusting mechanism 9 includes a fixed block 902, a rotating disk 901, and a connecting rod 903 fixed to one side of the rotating shaft 602. The rotating disk 901 is rotatably connected to the top of the fixed block 902. Baffles 904 are fixed at both ends of the connecting rod 903. A stop block 905 is provided on the top of the baffle 904. A scale indicator arrow 906 is fixed on one side of the fixed block 902.

[0067] The adjusting mechanism 9 is rigidly connected to the rotating shaft 602 via the fixed block 902. The rotating disk 901 employs a circumferential positioning bearing device to ensure axial stability when an adjusting torque is applied. The connecting rod 903 forms a foldable adjusting arm with the baffle 904 via a double-end hinge structure. The stop block 905 at the top of the baffle 904 adopts a wedge design, which serves as both an adjustment limit limiter and a compact storage structure with the connecting rod 903 in the folded state. The scale indicator arrow 906 is integrated into the arc-shaped surface of the fixed block 902, and the scale line it points to directly maps the rotation angle of the connecting rod 903. The operator can quantitatively adjust the angle of the support surface by observing the relative position of the arrow and the scale. The entire adjusting mechanism converts rotational motion into linear displacement through a mechanical linkage design, forming a closed-loop adjusting structure in conjunction with the clamping system of the limiting mechanism.

[0068] The working principle of the manual push-pull metal product material handling cart of the present invention:

[0069] 1. Adjustable support component installation and adjustment

[0070] Workers place the adjustable support 800 between the limiting mechanisms 700. The number of limiting mechanisms 700 varies depending on the material weight; generally, three sets of limiting mechanisms 700 are symmetrically arranged. The position of the sliding support rod 701 can be moved to support the limiting rod 801. After moving the position of the sliding support rod 701, it is fixed to the second support rod 604 via a buckle 702. The second support rod 604 slides on the first support rod 603 according to the material volume, changing the distance between the second support rods 604. Once determined, bolts are used to pass through the second support rod 604 and abut against the first support rod 603.

[0071] Then rotate the rotating plate 703 to tilt the locking plate 704. One of the two arc-shaped grooves on the locking plate 704 contacts the top wall of the limiting rod 801, and the other contacts the bottom wall of the limiting rod 801. The rotating disk 901 and the connecting rod 903 can be rotated to rotate the baffle 904 and stop 905 on the connecting rod 903 relative to a placement rod 802 on the edge. This placement rod 802 drives the limiting rod 801 to move in different directions. Observe the scale indicator arrow 906 to make the adjustment position more precise. Then, fix the nut on the rotating plate 703 to limit the rotation plate 703 and clamp the limiting rod 801.

[0072] 2. Material lifting and handling

[0073] Workers push both ends of the transport vehicle bracket 1, moving it to the appropriate position via the rollers at the bottom, and place the materials to be transported onto the lifting plate 3. Then, they rotate the rocker arm 404, which drives the transmission cylinder 405 to rotate via the drive helical gear and driven helical gear 406. The transmission cylinder 405 drives the transmission belt 407 to wind up, which in turn lifts the lifting plate 3. The pulley 402 on the lifting plate 3 rotates on the sliding rod 401, allowing for smoother up-and-down movement of the lifting plate 3. After the lifting plate 3 is raised to the appropriate position, the plug of the transport vehicle bracket 1 is inserted through the through hole 408 on the transport vehicle bracket 1 and the driven helical gear 406, thus positioning the transmission cylinder 405. The materials on the lifting plate 3 are then removed and placed at the same height onto the placement rod 802.

[0074] 3. Adjustable support tilt and disassembly

[0075] Loosen the limiting bolt 606 so that it does not abut against the rotating plate 608, so that the rotating shaft 602 can drive the adjustable support 800 to rotate, so that the adjustable support 800 can tilt, making it easier to take out the material or to sort and organize the material.

[0076] To disassemble the adjustable support 800, simply rotate the rotating plate 703 to loosen the threaded post and nut, aligning the locking plate 704 with the limiting rod 801, allowing the adjustable support 800 to be removed. The operator can then hold the limiting rod 801 and adjust the distance between the two limiting rods 801 using the universal joint 803, causing the stop bar 804 on the limiting rod 801 to contact the material, facilitating the removal of both the adjustable support 800 and the material.

[0077] It should be noted that, in actual implementation, the structure depicted in the accompanying drawings is not a fixed or unchanging embodiment. The components of the embodiments of the invention described and shown in these drawings can typically be arranged and designed in various different configurations. Furthermore, the accompanying drawings and abstract drawings are merely illustrative and do not represent the specific structure or actual quantity in a concrete implementation.

[0078] Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense as would be understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation of quantity. Terms such as "comprising" or "including" mean that the element or component preceding the word encompasses the element or component listed following the word and its equivalents, without excluding other elements or components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0079] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed in the present invention without exceeding the protection scope of the present invention.

Claims

1. A manually operated push-pull type metal product material handling cart, comprising a cart support (1), characterized in that: A support plate (5) is fixed on one side of the top of the transport vehicle bracket (1), and multiple placement mechanisms (6) are fixed at intervals along the vertical direction on the inner wall of the support plate (5). Each of the placement mechanisms (6) is slidably connected to an adjustment mechanism (9) at its top, and the top of the placement mechanism (6) is also slidably connected to a plurality of limiting mechanisms (7), and an adjustable support member (8) is snapped onto the limiting mechanism (7). The transport vehicle bracket (1) has a transmission mechanism (4) connected to one side wall and a lifting plate (3) slidably connected to the other side wall. The lifting plate (3) is connected to the transmission mechanism (4) in a transmission connection.

2. The manually pushed-pull type metal product material handling cart according to claim 1, characterized in that: The bottom of the transport vehicle bracket (1) is symmetrically connected with multiple rollers (2), and the rollers (2) are universal wheels with self-locking function.

3. The manually pushed-pull type metal product material handling cart according to claim 1, characterized in that: The transmission mechanism (4) includes a guide wheel (403), a rocker arm (404) and a transmission cylinder (405). The rocker arm (404) is rotatably connected to the side wall of the transport vehicle bracket (1), and a transmission helical gear is fixed at one end of the rocker arm (404). The transmission cylinder (405) is rotatably connected to the side wall of the transport vehicle bracket (1). One end of the transmission cylinder (405) is fixed with a driven helical gear (406) that meshes with the transmission helical gear. The side wall of the driven helical gear (406) is provided with several through holes (408) arranged in a circumferential array. The transport vehicle bracket (1) is fitted with a plug that matches one of the through holes (408). The outer surface of the transmission cylinder (405) is wrapped with a transmission belt (407), the guide wheel (403) is rotatably connected to the top of the transport vehicle bracket (1), and one end of the transmission belt (407) passes around the guide wheel (403) and is fixedly connected to the top of the lifting plate (3).

4. The manually pushed-pull type metal product material handling cart according to claim 3, characterized in that: The transport vehicle bracket (1) is symmetrically fixed with a slide rod (401) on one side, and two sets of pulleys (402) are symmetrically rotatably connected to both sides of the lifting plate (3). Each set of pulleys (402) includes four wheel sets, two of which are slidably connected to one side wall of the slide rod (401), and the other two wheel sets are slidably connected to the other side wall of the slide rod (401). The four wheel sets are clamped on the slide rod (401) and move.

5. The manually pushed-pull type metal product material handling cart according to claim 1, characterized in that: The placement mechanism (6) includes two fixing plates (601) symmetrically fixed to the inner wall of the support plate (5), and a bearing (607) is fixed to the top of each fixing plate (601), and the two ends of the rotating shaft (602) extend into the bearing (607). A rotating plate (608) is fixed on the outer surface of one end of the rotating shaft (602). A limiting plate (605) is fixed on one of the fixing plates (601). The limiting plate (605) has a groove for the rotating plate (608) to rotate. A limiting bolt (606) is threadedly connected to one side of the limiting plate (605). One end of the limiting bolt (606) abuts against the rotating plate (608). The bottom of the rotating shaft (602) is fixed with a plurality of first support rods (603), and the two ends of the first support rods (603) are slidably connected with second support rods (604).

6. The manually pushed-pull type metal product material handling cart according to claim 5, characterized in that: The limiting mechanism (7) includes a sliding support rod (701) and a snap-fit ​​plate (704). The side wall of the sliding support rod (701) is provided with a buckle (702), and the top of the second support rod (604) is provided with a groove that matches the buckle (702). The inner wall of the sliding support rod (701) is rotatably connected to a rotating plate (703) via a threaded column. A snap-fit ​​plate (704) is fixed on one side of the rotating plate (703). Arc-shaped grooves are respectively opened at both ends of the snap-fit ​​plate (704). One arc-shaped groove is located at the top end of the snap-fit ​​plate (704), and the other arc-shaped groove is located at the bottom end of the snap-fit ​​plate (704).

7. The manually pushed-pull type metal product material handling cart according to claim 1, characterized in that: The adjustable support (8) includes two limiting rods (801) and several placement rods (802). The two ends of the placement rods (802) are connected to the limiting rods (801) through universal joints (803). A stop bar (804) is fixed on one side of each limiting rod (801).

8. The manually pushed-pull type metal product material handling cart according to claim 5, characterized in that: The adjustment mechanism (9) includes a fixed block (902) fixed on one side of the rotating shaft (602), a rotating disk (901) and a connecting rod (903). The rotating disk (901) is rotatably connected to the top of the fixed block (902). Baffles (904) are fixed at both ends of the connecting rod (903). A stop block (905) is provided on the top of the baffle (904). A scale indicator arrow (906) is fixed on one side of the fixed block (902).

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