Double-layer conveying system and movable lifting equipment with same

Abstract

The utility model discloses a double-layer conveying system and movable lifting equipment with the same, and belongs to the technical field of engineering machinery. The double-layer conveying system comprises an upper-layer double-stroke guide box, and the first end of the upper-layer double-stroke guide box penetrates through a three-section arm head mechanical limiting support to be connected with the second end of a four-section arm head hinge point support. The first end of the upper-layer double-stroke drag chain is connected with the rotating bracket, and the second end of the upper-layer double-stroke drag chain is connected with the second end of the upper-layer double-stroke guide box after being bent upwards; the first end of the lower-layer double-stroke guide box penetrates through the one-section arm mechanical limiting support and is connected with the rotating bracket; the first end of the lower-layer single-stroke drag chain is connected to the supporting platform of the drag chain fixing support in the first-section arm; and the second end is bent upwards and then is connected with the second end of the lower-layer double-stroke guide box. According to the utility model, the possible collapse problem of the drag chain can be effectively relieved, meanwhile, the transmission path of a load is optimized, the performance requirements on the drag chain and the guide box are reduced, and the overall reliability and safety are improved.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, and in particular relates to a double-layer conveying system and a mobile lifting device having the system. Background Technology

[0002] Mobile scissor lift platforms, as efficient aerial work tools, are widely used in shipyards, docks, aerospace, factory construction, municipal engineering, fire rescue, equipment maintenance, and many other fields, providing strong support for aerial work, equipment installation, and maintenance in various industries. Based on design features and functional differences, mobile scissor lift platforms can be further divided into various types such as scissor lifts, mast lifts, and boom lifts. However, in traditional straight-arm mobile scissor lift platforms, the conveyor system generally adopts a multi-stage conveying method to transmit power and signal sources. However, the layout methods of different manufacturers are not entirely the same, leading to frequent problems such as high overall failure rates, easy collapse of cable chains, and short service life.

[0003] The existing conveyor system uses a layout on both sides of the boom to achieve three conveying distances. There are no support points at the bending radius of the cable chain, leaving it suspended for extended periods under high load, severely reducing its lifespan. The cantilever structure means even slight machine swaying causes significant chain swaying at the tail, worsening its load-bearing capacity. Under high load and cantilever conditions, the cable chain will inevitably sag at the bending radius after a certain period. If the sag or sway exceeds the lowest point of the guide support, a collision will occur, potentially breaking the cable chain and internal piping, leading to serious safety accidents. During boom retraction, the cable chain continues to rub against the guide bracket after landing on one boom section, posing a risk of jamming. The guide boxes are directly fixed to the boom head, resulting in high localized stress at the fixed end during initial installation and after a certain period of use, making them prone to damage and failure. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to optimize the structure of the pipeline conveying system and improve the reliability, stability and safety of the conveying system and lifting equipment.

[0005] To achieve the above objectives, this utility model provides a double-layer conveying system and a mobile lifting device having the system.

[0006] In a first aspect, this application provides a double-layer conveying system, comprising:

[0007] The first end of the four-section boom hinge point bracket is connected to the telescopic boom.

[0008] The upper double-stroke guide box has its first end passing through the mechanical limiting support of the three-section boom head and connecting to the second end of the hinge point bracket of the four-section boom head.

[0009] The upper double-stroke cable chain has its first end connected to the rotating bracket, and its second end bent upwards and connected to the second end of the upper double-stroke guide box.

[0010] The lower double-stroke guide box has its first end passing through a mechanical limit support of a section arm and connected to a rotating bracket.

[0011] The lower single-stroke cable chain has its first end connected to the support platform of the cable chain fixing bracket in one section of the boom; its second end bends upward and connects to the second end of the lower double-stroke guide box.

[0012] The upper double-stroke guide box, the upper double-stroke cable chain, the lower double-stroke guide box, and the lower single-stroke cable chain are arranged sequentially from top to bottom;

[0013] The two-section boom hinge point bracket has its first end connected to the telescopic boom and its second end connected to the rotating bracket, providing a support point for the rotating bracket.

[0014] The second end of the four-section boom hinge point bracket is a shaft structure. The upper double-stroke guide box can rotate freely around the shaft structure. A pin is provided on the outside of the shaft structure to limit displacement perpendicular to the boom direction.

[0015] The upper double-stroke guide box and the upper double-stroke cable chain extend and retract under the drive of the four-section boom head hinge point bracket, and are used for the pipeline transmission of power and signals between the second and fourth sections of the boom.

[0016] The single-section arm mechanical limiting support includes: a nylon limiting slider and a single-section arm bracket. The nylon limiting slider is a rectangular groove surrounded by three walls. The lower double-stroke guide box is limited in the rectangular groove. One side of the single-section arm bracket is used to fix and support the nylon limiting slider, and the other side is connected to the telescopic arm.

[0017] The mechanical limiting support for the three-section boom head includes: an upper nylon limiting slider, a lower nylon slider, and a three-section boom head bracket. The three-section boom head bracket, the upper nylon limiting slider, and the lower nylon slider are connected by bolts and form a rectangular hole. The first end of the upper double-stroke guide box passes through the rectangular hole.

[0018] The double-layer conveyor system also includes multiple cable chain support wheels, which are set on the upper side of the upper double-stroke cable chain and the upper side of the lower single-stroke cable chain, with each cable chain support wheel spaced at the same distance.

[0019] The double-layer conveyor system also includes multiple lower-layer drag chain supports set on the underside of the lower single-stroke drag chain. Each lower-layer drag chain support is spaced at the same distance, which makes the force more uniform and improves the stability and safety of the system.

[0020] The double-layer conveyor system also includes: a first-section arm support pulley, which is located above the end of the lower single-stroke cable chain; and a second-section arm support pulley, which is located above the end of the upper double-stroke cable chain.

[0021] Secondly, this application provides a mobile lifting device, including the aforementioned double-layer conveying system.

[0022] The double-layer conveying system and mobile lifting device with this system provided by this utility model adopt a single-stroke lower layer and a double-stroke upper layer integrated layout on one side. This ensures that the bending radius of the cable chain always has a stable bottom support, preventing the cable chain from being suspended and swaying. This also makes the upper double-stroke cable chain section unloaded, reducing the requirements for the overhead capacity of the upper double-stroke cable chain. Both the upper and lower layers adopt a double-stroke guide box design, and a dual-degree-of-freedom mechanical limit is added to the basic arm, making the operation of the guide box more stable and safe. Attached Figure Description

[0023] Figure 1 This is a side view of a double-layer conveyor system.

[0024] Figure 2 This is a top view of a double-layer conveyor system;

[0025] Figure 3 This is a magnified view of a partial section of the double-layer conveyor system;

[0026] Figure 4 A cross-sectional view (AA) of a double-layer conveyor system;

[0027] Figure 5 This is a BB cross-sectional view of a double-layer conveyor system;

[0028] Figure 6 This is a CC sectional view of a double-layer conveyor system;

[0029] Figure 7 This is a DD cross-sectional view of a double-layer conveyor system;

[0030] Figure 8 This is a partial 3D view of the double-layer conveyor system;

[0031] In the diagram: 1-Telescopic boom; 2-Double-layer conveyor system; 3-Four-section boom head hinge bracket; 4-Three-section boom head mechanical limit support; 5-Two-section boom support roller; 6-Upper double-stroke cable chain; 7-Upper double-stroke guide box; 8-Cable chain support wheel; 9-Rotating bracket; 10-Two-section boom head hinge bracket; 11-One-section boom mechanical limit support; 12-Lower double-stroke guide box; 13-One-section boom cable chain fixing bracket; 14-One-section boom support roller; 15-Lower single-stroke cable chain; 16-Lower cable chain bracket; 401-Upper nylon limit slider; 402-Lower nylon slider; 403-Three-section boom head bracket; 1101-Nylon limit slider; 1102-One-section boom bracket. Detailed Implementation

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] refer to Figure 1-8 As shown, a double-layer conveying system includes:

[0035] The four-section boom hinge bracket 3 has its first end connected to the four-section boom of the telescopic boom 1 by bolts, and its second end is a shaft structure.

[0036] The upper double-stroke guide box 7 has its first end connected to the second end of the four-section boom head hinge bracket 3. The upper double-stroke guide box 7 can rotate freely around the shaft structure. A pin is provided on the outside of the shaft structure to limit the displacement perpendicular to the boom direction.

[0037] The upper double-stroke cable chain 6 has its first end connected to the rotating bracket 9, and its second end bent upwards and connected to the second end of the upper double-stroke guide box 7.

[0038] The upper double-stroke guide box 7 and the upper double-stroke cable chain 6 extend and retract under the drive of the fourth boom head hinge bracket 3, and are used for pipeline transmission of power and signals between the second and fourth boom sections.

[0039] The lower double-stroke guide box 12 has its first end passing through the mechanical limit support 11 of the first-section arm and connected to the rotating bracket 9. The mechanical limit support 11 of the first-section arm includes a nylon limit slider 1101 and a first-section arm bracket 1102. The nylon limit slider 1101 is a rectangular groove surrounded by three walls. The lower double-stroke guide box 12 is limited in the rectangular groove. One side of the first-section arm bracket 1102 is used to fix and support the nylon limit slider 1101, and the other side is connected to the first section of the telescopic arm 1 by bolts.

[0040] The lower single-stroke cable chain 15 has its first end connected to the support platform of the cable chain fixing bracket 13 in the first boom section, and is used for the pipeline transmission of power and signals between the first boom section and the second boom section; its second end is bent upward and connected to the second end of the lower double-stroke guide box 12.

[0041] The three-section arm head mechanical limit support 4 is fixed to the telescopic arm 1 by bolts. It includes an upper nylon limit slider 401, a lower nylon slider 402, and a three-section arm head bracket 403. The three-section arm head bracket 403 has an "L" shaped structure. One side is connected to the three-section arm of the telescopic arm 1 by bolts, and the other side is connected to the upper nylon limit slider 401 and the lower nylon slider 402 by bolts, forming a rectangular hole. The first end of the upper double-stroke guide box 7 passes through the rectangular hole of the three-section arm head mechanical limit support 4 and is used to limit the upper double-stroke guide box 7 during telescopic movement.

[0042] The two-section boom head hinge bracket 10 has its first end connected to the two-section boom of the telescopic boom 1 by bolts, and its second end is a shaft structure. The two-section boom head hinge bracket 10 is connected to the rotating bracket 9 and provides a front hinge support point. The rotating bracket 9 can rotate freely around the shaft structure. A pin is provided on the outside of the shaft structure to limit the displacement perpendicular to the boom direction.

[0043] The rotating bracket 9 is an integrated combination structure, including the upper guide box fixing bracket, the upper drag chain fixing bracket, and the lower guide box fixing bracket in the traditional conveyor system. The structure is simpler and it greatly optimizes the connection structure of the arm head.

[0044] The upper double-stroke guide box 7, the upper double-stroke cable chain 6, the lower double-stroke guide box 12, and the lower single-stroke cable chain 15 are arranged sequentially from top to bottom. The lower double-stroke guide box 12 and the lower single-stroke cable chain 15 serve the first and second boom sections, while the upper double-stroke guide box 7 and the upper double-stroke cable chain 6 serve the second, third, and fourth boom sections. The double-layer conveyor system 2 can achieve conveying distances for three strokes.

[0045] A single-arm support pulley 14 is positioned above the end of the lower single-stroke cable chain 15.

[0046] The two-section arm support pulley 5 is located above the end of the upper double-stroke cable chain 6.

[0047] Multiple cable chain support wheels 8 are set on the upper side of the upper double-stroke cable chain 6 and the lower single-stroke cable chain 15. Each cable chain support wheel 8 is spaced at the same distance, which makes the force more even and improves the stability and safety of the system.

[0048] Multiple lower-level cable chain supports 16 are arranged on the underside of the lower-level single-stroke cable chain 15. Each lower-level cable chain support 16 is spaced at the same distance, which makes the force more uniform and improves the stability and safety of the system.

[0049] The double-layer conveying system 2 of this utility model is connected to the telescopic arm 1 and is installed together on the machine body. The telescopic arm 1 includes a first arm, a second arm, a third arm, a fourth arm, a telescopic cylinder, a wire rope, and a pulley system. The fourth arm is sleeved inside the third arm, the third arm is sleeved inside the second arm, and the second arm is sleeved inside the first arm. The second, third, and fourth arms extend, retract, or extend from the arm above them under the drive of the telescopic cylinder, the wire rope, and the pulley system.

[0050] In this embodiment, the working process of the double-layer conveying system is as follows: one arm is hinged to the machine body, and the second arm extends or retracts under the drive of the telescopic cylinder. When the second arm moves, it drives the third and fourth arms to move synchronously through the wire rope and pulley system. The second arm drives the second arm hinge point bracket 10 and the rotating bracket 9 to move, and the fourth arm drives the fourth arm hinge point bracket 3 to move. The second arm hinge point bracket 10, the rotating bracket 9 and the fourth arm hinge point bracket 3 together drive the upper double-stroke guide box 7 and the lower double-stroke guide box 12 to move back and forth. The upper double-stroke guide box 7 drives the upper double-stroke drag chain 6 to move synchronously, and the lower double-stroke guide box 12 drives the lower single-stroke drag chain 15 to move synchronously, thereby realizing the transmission of variable distance between the power source, the signal source and the multi-stage telescopic arm.

[0051] The movement of the upper double-stroke guide box and the lower double-stroke guide box is also limited by the mechanical limit support of the three-section boom head, the support pulley of the two-section boom, the drag chain support wheel, the limit support of the one-section boom, and the support pulley of the one-section boom.

[0052] The cable chain used in this embodiment is a commonly used cable chain structure in the industry, which is composed of many unit links connected end to end, forming a space that can accommodate pipelines, and each link can rotate freely.

[0053] The double-layer conveying system can effectively achieve traction, constraint and protection of power pipelines (such as cables and hydraulic pipelines).

[0054] By optimizing the layout and number of components of the conveying system, the assembly cycle of the double-layer conveying system in this embodiment is shortened from 45-50 minutes / unit to 25-30 minutes / unit, which can greatly improve production efficiency and reduce production time costs.

[0055] This utility model's double-layer conveyor system adopts a single-stroke lower layer and a double-stroke upper layer integrated layout on one side. This ensures that the cable chain always has stable bottom support at its bending radius, preventing the cable chain from being suspended or swaying. This also means that the upper double-stroke cable chain section is unloaded, reducing the overhead capacity requirements for the upper double-stroke cable chain. Both the upper and lower layers use a double-stroke guide box design, and a dual-degree-of-freedom mechanical limiter is added to the basic arm, making the guide box operation smoother and safer.

[0056] In this embodiment, hinged constraints are used instead of traditional fixed constraints. By adding lateral and vertical mechanical limits to the intermediate arm, the upward deformation caused by prestress during the initial installation of the cable chain and the sagging problem that may occur after long-term use are effectively alleviated. At the same time, the load transmission path is optimized, the stress load of additional bending moment on the cable chain and guide box is reduced, the performance requirements of the cable chain and guide box are reduced, and the overall reliability and safety are improved.

[0057] Example 2

[0058] A mobile lifting device includes the aforementioned double-layer conveying system, and also includes a telescopic arm and a body.

[0059] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0060] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0061] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A double-layer conveying system, characterized in that, include: The first end of the four-section boom hinge point bracket is connected to the telescopic boom. The upper double-stroke guide box has its first end passing through the mechanical limiting support of the three-section boom head and connecting to the second end of the hinge point bracket of the four-section boom head. The upper double-stroke cable chain has its first end connected to the rotating bracket, and its second end bent upwards and connected to the second end of the upper double-stroke guide box. The lower double-stroke guide box has its first end passing through a mechanical limit support of a section arm and connected to a rotating bracket. The lower single-stroke cable chain has its first end connected to the support platform of the cable chain fixing bracket in one section of the boom; its second end bends upward and connects to the second end of the lower double-stroke guide box. The upper double-stroke guide box, the upper double-stroke cable chain, the lower double-stroke guide box, and the lower single-stroke cable chain are arranged sequentially from top to bottom; The two-section boom hinge point bracket has its first end connected to the telescopic boom and its second end connected to the rotating bracket, providing a support point for the rotating bracket.

2. The double-layer conveying system according to claim 1, characterized in that, The second end of the four-section boom hinge point bracket is a shaft structure. The upper double-stroke guide box can rotate freely around the shaft structure. A pin is provided on the outside of the shaft structure to limit displacement perpendicular to the boom direction.

3. The double-layer conveying system according to claim 1, characterized in that, The upper double-stroke guide box and the upper double-stroke cable chain extend and retract under the drive of the fourth boom head hinge point bracket, and are used for the pipeline transmission of power and signals between the second and fourth boom sections.

4. A double-layer conveying system according to claim 1, characterized in that, The single-section arm mechanical limiting support includes: a nylon limiting slider and a single-section arm bracket. The nylon limiting slider is a rectangular groove surrounded by three walls. The lower double-stroke guide box is limited within the rectangular groove. One side of the single-section arm bracket is used to fix and support the nylon limiting slider, and the other side is connected to the telescopic arm.

5. A double-layer conveying system according to claim 1, characterized in that, The mechanical limiting support for the three-section boom head includes: an upper nylon limiting slider, a lower nylon slider, and a three-section boom head bracket. The three-section boom head bracket, the upper nylon limiting slider, and the lower nylon slider are connected by bolts and form a rectangular hole. The first end of the upper double-stroke guide box passes through the rectangular hole.

6. A double-layer conveying system according to claim 1, characterized in that, Also includes: Multiple cable support wheels are arranged on the upper side of the upper double-stroke cable chain and the upper side of the lower single-stroke cable chain, with each cable support wheel spaced at the same distance.

7. A double-layer conveying system according to claim 1, characterized in that, Also includes: Multiple lower-level cable chain supports are installed on the lower side of the lower single-stroke cable chain, with each lower-level cable chain support spaced at the same distance.

8. A double-layer conveying system according to claim 1, characterized in that, Also includes: A single-arm support pulley is positioned above the end of the lower single-stroke cable chain; The two-section arm support pulley is located above the end of the upper double-stroke cable chain.

9. A mobile lifting device, characterized in that, Includes the double-layer conveyor system as described in any one of claims 1-8.

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