A gantry type secondary lifting mechanism and mobile handling equipment

Abstract

The present invention relates to the technical field of mobile transport lifting mechanisms, and specifically to a gantry-type secondary lifting mechanism and mobile transport equipment. The gantry-type secondary lifting mechanism includes a fixed gantry, a primary mobile gantry and a secondary mobile gantry, wherein the primary mobile gantry is escalably arranged on the fixed gantry, and the secondary mobile gantry is escalably arranged on the primary mobile gantry; it also includes a synchronous belt wound around the fixed gantry and the primary mobile gantry, respectively, the synchronous belt can drive the primary mobile gantry to rise and fall, and the secondary mobile gantry is fixed on the synchronous belt and is driven by the synchronous belt to rise and fall; a first limiting structure is provided at the upper end of the primary mobile gantry; when the secondary mobile gantry rises to a first limit position relative to the primary mobile gantry, the secondary mobile gantry abuts against the first limiting structure to realize the linkage between the secondary mobile gantry and the primary mobile gantry.

Description

Technical Field

[0001] The invention relates to the technical field of mobile transport lifting mechanisms, and in particular to a gantry type secondary lifting mechanism and mobile transport equipment. Background Art

[0002] At present, in the market, the lifting mechanism of mobile handling equipment mostly adopts the gantry type two-stage lifting mechanism, which is commonly seen in forklift structures. The main structure is roller guide, oil cylinder lifting, channel steel as frame, chain sprocket to transmit movement. The oil cylinder is placed in the middle of the gantry. However, the above-mentioned gantry type lifting mechanism has the disadvantages of heavy weight, low precision, high noise, and large space occupation.

[0003] Specifically, the main part of the above-mentioned gantry-type secondary lifting mechanism uses channel steel as the frame. Although the strength and rigidity of the gantry can be guaranteed, the fixed size of the channel steel will cause the overall weight to be too heavy. When used on mobile handling equipment, it will increase ineffective consumption and be uneconomical. The guide part uses rollers, which are roughly limited in the channel steel and can roll back and forth in a certain direction. There is a large gap between the roller and the guide bar. Although the gantry can be raised and lowered smoothly, the large gap will reduce the accuracy of the entire system. In addition, the inner and outer gantry will produce noise due to collision during relative movement. Therefore, this structure is only suitable for handling occasions with low precision requirements. In addition, the oil cylinder is placed in the middle of the gantry and connected to the gantry cross brace. It is the power device for lifting the entire gantry. The position of the oil cylinder will hinder the transfer of goods in the space and block the field of vision. The oil supply hydraulic station of the oil cylinder will occupy a large space and make noise. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the lifting part of the mobile handling equipment in the prior art, such as excessive weight, low precision, large space occupation and high noise, thereby providing a gantry-type secondary lifting mechanism and mobile handling equipment.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] The present invention provides a gantry-type secondary lifting mechanism, which comprises: a fixed gantry and a primary movable gantry, wherein the primary movable gantry is liftably arranged on the fixed gantry, and a first limiting structure is arranged on the upper end of the primary movable gantry; a secondary movable gantry, which is liftably arranged on the primary movable gantry; a synchronous belt, which is respectively wound around the fixed gantry and the primary movable gantry, and the synchronous belt can drive the primary movable gantry to rise and fall; the secondary movable gantry is fixed on the synchronous belt and is lifted and lowered by the driving of the synchronous belt; wherein, when the secondary movable gantry rises to a first extreme position relative to the primary movable gantry, the secondary movable gantry abuts against the first limiting structure to realize the linkage between the secondary movable gantry and the primary movable gantry, and they rise synchronously driven by the synchronous belt.

[0007] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, a driving pulley is provided at the upper end of the fixed gantry, and at least one fixed tensioning mechanism is provided at the lower end; wherein, the driving pulley is connected to the driving structure; a driven pulley is provided at the upper end of the first-level movable gantry, and a reversing wheel is provided at the lower end; the synchronous belt is respectively and sequentially wound around the driving pulley, the fixed tensioning mechanism, the driven pulley and the reversing wheel to form a closed ring belt.

[0008] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the fixed gantry includes two vertical fixed gantry frames and a crossbeam; the driving structure includes a motor and a drive shaft, which are respectively arranged on the crossbeam; the active pulley has at least one, which is arranged at the upper end of the fixed gantry frame and connected to the drive shaft.

[0009] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the first-level movable gantry includes two vertical first-level movable gantry frames, wherein the first-level movable gantry frames are slidably arranged in the fixed gantry frames, and the two are slidably matched through a first guide rail slider structure.

[0010] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the first guide rail slider structure includes at least one slider on the inner side of the fixed gantry frame, and a linear guide rail on the outer side of the first-level movable gantry frame.

[0011] Optionally, the above-mentioned gantry type secondary lifting mechanism includes a second limiting structure, which is a fixed gantry limiting block, which is arranged on the inner side of the upper end of the fixed gantry frame.

[0012] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the upper and lower ends of the outer side of the first-stage movable gantry frame are also respectively provided with a first-stage gantry descending block and a first-stage gantry rising block that can abut and limit the fixed gantry limit block.

[0013] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the secondary movable gantry is connected to the primary movable gantry frames on both sides via a second guide rail slider structure; and both sides of the secondary movable gantry are connected to the driving pulley via a synchronous pulley pressure plate.

[0014] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the first limiting structure includes a load-bearing limit block located on the inner side of the upper end of the primary moving gantry frame; oil pressure buffers are provided at both ends of the secondary moving gantry; wherein, when the secondary moving gantry rises to a first extreme position relative to the primary moving gantry, the oil pressure buffers at both ends of the secondary moving gantry abut against the load-bearing limit block.

[0015] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, a secondary gantry descending limit block is provided on the inner side of the lower end of the primary moving gantry frame; secondary gantry descending blocks are provided at both ends of the secondary moving gantry; when the secondary moving gantry descends to the second extreme position relative to the primary moving gantry, the secondary gantry descending block abuts against the secondary gantry descending limit block.

[0016] The present invention also provides a mobile handling device, comprising a lifting mechanism, wherein the lifting mechanism is the above-mentioned gantry-type two-stage lifting mechanism.

[0017] The technical solution of the present invention has the following advantages:

[0018] 1. The gantry type secondary lifting mechanism provided by the present invention comprises a fixed gantry, a primary movable gantry and a secondary movable gantry, wherein the primary movable gantry is escalably arranged on the fixed gantry, and the secondary movable gantry is escalably arranged on the primary movable gantry; it also comprises a synchronous belt respectively wound around the fixed gantry and the primary movable gantry, the synchronous belt can drive the primary movable gantry to rise and fall, and the secondary movable gantry is fixed on the synchronous belt and is driven by the synchronous belt to rise and fall; other accessories can be installed on the secondary movable gantry, and its structural form of independent rise and fall can enable the equipment to be moved at a conventional height When lifting, only the secondary gantry part is lifted, avoiding the invalid consumption caused by the simultaneous lifting of the first and second stages; a first limiting structure is provided at the upper end of the first moving gantry; when the secondary moving gantry rises to a first extreme position relative to the first moving gantry, the secondary moving gantry abuts against the first limiting structure to realize the linkage between the secondary moving gantry and the first moving gantry, and they rise synchronously driven by the synchronous belt to realize the secondary lifting. The synchronous belt structure is adopted to solve the technical problems of the heavy weight, low precision and large space occupation of the lifting part of the mobile handling equipment in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a gantry-type two-stage lifting mechanism provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a partial structure of a fixed gantry portion provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a primary movable gantry provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a secondary movable gantry provided in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the working principle of a gantry-type two-stage lifting mechanism provided in an embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1-fixed gantry, 2-first-level mobile gantry, 3-second-level mobile gantry, 4-fixed tensioning mechanism, 5-fixed gantry frame, 6-slider, 7-fixed gantry limit block, 8-driving pulley, 9-expansion sleeve, 10-drive shaft, 11-motor, 12-crossbeam, 13-seat bearing, 14-first-level mobile gantry frame, 15-guide slider for second-level gantry, 16-driven pulley, 17-load-bearing limit block, 18-first-level gantry descending block, 19-linear guide, 20-first-level gantry rising block, 21-reversing wheel, 22-second-level gantry descending limit block, 23-second-level mobile gantry frame, 24-synchronous pulley pressure plate, 25-hydraulic buffer, 26-buffer fixing block, 27-second-level gantry descending block, 28-synchronous belt. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] Example 1

[0031] like Figure 1-5 As shown, this embodiment provides a gantry-type two-stage lifting mechanism, which includes four major parts: a fixed gantry 1, a first-stage movable gantry 2, a second-stage movable gantry 3 and a fixed tensioning mechanism 4.

[0032] Among them, the fixed gantry 1 has a fixed gantry frame 5 as the main frame and has a crossbeam 12 at the top; the first-level movable gantry 2 is liftably arranged on the fixed gantry 1, and a first limiting structure is provided at the upper end of the first-level movable gantry 2; the second-level movable gantry 3 is liftably arranged on the first-level movable gantry 2; a synchronous belt 28 is respectively wound around the fixed gantry 1 and the first-level movable gantry 2, and the synchronous belt 28 can drive the first-level movable gantry 2 to rise and fall, and the synchronous belt 28 is preferably a flexible synchronous belt, which, as a transmission part, can eliminate vibration and reduce noise, and is suitable for low-noise scenes; the second-level movable gantry 3 is fixed on the synchronous belt and is lifted and lowered by the synchronous belt 28; wherein, when the second-level movable gantry 3 rises to the first limit position relative to the first-level movable gantry 2, the second-level movable gantry 3 abuts against the first limiting structure to realize the linkage between the second-level movable gantry 3 and the first-level movable gantry 2, and rises synchronously under the drive of the synchronous belt 28.

[0033] In the gantry-type secondary lifting mechanism provided in the present embodiment, other accessories can be installed on the secondary moving gantry. Its structural form that can be lifted and lowered independently can make the equipment lift and lower at a conventional height by only lifting and lowering the secondary gantry part, thus avoiding the ineffective consumption caused by lifting and lowering the primary and secondary parts at the same time; and, a first limiting structure is provided at the upper end of the primary moving gantry; when the secondary moving gantry rises to a first limit position relative to the primary moving gantry, the secondary moving gantry abuts against the first limiting structure to realize the linkage between the secondary moving gantry and the primary moving gantry, and they rise synchronously under the drive of the synchronous belt to realize secondary lifting. The structural mode of the synchronous belt solves the technical problems of the heavy weight, low precision and large space occupation of the lifting part on the mobile handling equipment in the prior art, so that the repeated positioning accuracy of the equipment is high during lifting and lowering, and the high-precision positioning requirements in compact scenes can be met; and, the main frame adopts thin plate bending and welding, optimizes the external structure, and increases weight reduction holes, while ensuring strength and rigidity, the weight is reduced to the greatest extent, so that the overall energy consumption of the entire mechanism is reduced when it is used on mobile handling equipment.

[0034] Optionally, in the above-mentioned gantry type two-stage lifting mechanism, the upper end of the fixed gantry 1 is provided with a driving pulley 8, and the lower end is provided with at least one fixed tensioning mechanism 4. Preferably, as Figure 1 and Figure 4 As shown, the fixed tensioning mechanism 4 is set to two, and the fixed tensioning mechanism 4 can be selected as a fixed tensioning wheel; wherein the driving pulley 8 is connected to the driving structure, and the driving structure includes a motor 11 and a driving shaft 10, which are respectively arranged on the cross beam 12, and the above-mentioned motor 11 is preferably a reduction motor; the driving pulley 8 can be set to two, which are respectively located on the fixed gantry frames 5 at both ends, which are arranged at the upper end of the fixed gantry frame 5 and connected to the driving shaft 10. Optionally, both ends of the driving shaft 10 are fixed by seat bearings 13, and the driving pulley 8 and the driving shaft 10 are connected and fixed by a tightening sleeve 9; the upper end of the first-level movable gantry 2 is provided with a driven pulley 16, and the lower end is provided with a reversing wheel 21; the synchronous belt 28 is respectively wound around the driving pulley 8, the fixed tensioning mechanism 4, the driven pulley 16 and the reversing wheel 21 in sequence to form a closed annular belt. By arranging an annular synchronous belt and a corresponding driving structure, the weight of the entire lifting mechanism can be reduced, and the operation accuracy of the lifting mechanism can be improved.

[0035] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the first-level mobile gantry 2 includes two vertical first-level mobile gantry frames 14, wherein the first-level mobile gantry frame 14 is slidably arranged in the fixed gantry frame 5, and the two are slidably matched through a first guide rail slider structure, wherein the first guide rail slider structure may include at least one slider 6 on the inner side of the fixed gantry frame 5, and a linear guide rail 19 on the outer side of the first-level mobile gantry frame 14; or, the above-mentioned guide rail and slider position conversion, and the setting method of the first guide rail slider structure realizes precise displacement.

[0036] Optionally, the above-mentioned gantry type secondary lifting mechanism includes a second limiting structure, which is a fixed gantry limiting block 7, which is arranged on the inner side of the upper end of the fixed gantry frame 5; the upper and lower ends of the outer side of the first-stage mobile gantry frame 14 are also respectively provided with a first-stage gantry lowering block 18 and a first-stage gantry rising block 20 that can abut against the fixed gantry limiting block 7 for limiting; the second-stage mobile gantry 3 is connected to the first-stage mobile gantry frame 14 on both sides through a second guide rail slider structure; the two sides of the second-stage mobile gantry 3 are connected to the driving pulley 8 through a synchronous pulley pressure plate 24. The key mechanisms of the gantry type secondary lifting mechanism provided in this embodiment are all concentrated in the gantry on both sides, and there is no mechanism blocking in the middle, which is conducive to the delivery of goods.

[0037] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, the first limiting structure includes a load-bearing limit block 17 located on the inner side of the upper end of the primary moving gantry frame 14; oil pressure buffers 25 are provided at both ends of the secondary moving gantry 3, and the oil pressure buffers 25 can be fixed at both ends of the secondary moving gantry through buffer fixing blocks; wherein, when the secondary moving gantry 3 rises to the first extreme position relative to the primary moving gantry 2, the oil pressure buffers 25 at both ends of the secondary moving gantry 3 abut against the load-bearing limit block 17, which can offset the impact force when the secondary moving gantry is limited, thereby improving the stability of the lifting mechanism.

[0038] Optionally, in the above-mentioned gantry-type secondary lifting mechanism, a secondary gantry descending limit block 22 is provided on the inner side of the lower end of the primary movable gantry frame 14; secondary gantry descending blocks 27 are provided at both ends of the secondary movable gantry 3; when the secondary movable gantry 3 descends to the second extreme position relative to the primary movable gantry 2, the secondary gantry descending block 27 abuts against the secondary gantry descending limit block 22 to limit the upper and lower extreme positions of the secondary movable gantry 3.

[0039] The working process of the gantry type secondary lifting mechanism provided in this embodiment is as follows:

[0040] Other accessories can be installed on the secondary mobile gantry 3. The synchronous pulley pressure plate 24 connects the synchronous belt and the secondary mobile gantry 3. When the secondary mobile gantry 3 needs to be lifted to the top, the active pulley 8 drives the synchronous belt, which can be a belt. The belt pulls the secondary mobile gantry 3 to the load-bearing limit block 17. At this time, the oil pressure buffer 25 is in contact with the load-bearing limit block 17.

[0041] The secondary movable gantry 3 continues to move upward, driving the primary movable gantry 2 to rise at the same time. When the primary gantry rises to the position block 20 and contacts the fixed gantry limit block 7, the mechanism reaches the highest point.

[0042] When it is necessary to descend to the bottom, the secondary mobile gantry 3 and the primary mobile gantry 2 descend at the same time. Until the primary gantry descends to the position block 18 and contacts the fixed gantry limit block 7, the primary mobile gantry 2 stops moving, and the secondary mobile gantry 3 continues to move downward until the secondary gantry descends to the position block 27 and contacts the secondary gantry descending limit block 22, completing the process of descending to the bottom.

[0043] Example 2

[0044] The present embodiment provides a mobile handling device, including a lifting mechanism, and the lifting mechanism is the gantry-type two-stage lifting mechanism described in Example 1. The mobile handling device provided in the present embodiment has a light overall mass and low energy consumption. The gantry-type two-stage lifting mechanism adopted can make the device only lift the two-stage gantry part when lifting at a conventional height, avoiding the ineffective consumption caused by lifting the first and second stages at the same time; the guide rail slider is used for guidance and the synchronous belt is used for transmission, so that the repeated positioning accuracy of the device during lifting is high, which can meet the high-precision positioning requirements in compact scenes; and the gantry-type two-stage lifting mechanism is used, and the key mechanisms are concentrated in the two-side gantry, without any mechanism blocking in the middle, which is conducive to the delivery of goods and has a low space occupancy rate; the flexible synchronous belt is used as the transmission part, which can eliminate vibration and reduce noise, and is suitable for low-noise scenes.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A gantry type two-stage lifting mechanism, characterized in that: include: A fixed gantry and a first-level movable gantry, wherein the first-level movable gantry is liftably arranged on the fixed gantry, and a first limiting structure is arranged at the upper end of the first-level movable gantry; A secondary movable gantry, which is liftably arranged on the primary movable gantry; A synchronous belt, which is respectively wound around the fixed gantry and the first-level movable gantry, and the synchronous belt can drive the first-level movable gantry to rise and fall; The secondary movable gantry is fixed on the synchronous belt and is driven by the synchronous belt to rise and fall; in, When the secondary moving gantry rises to the first extreme position relative to the primary moving gantry, the secondary moving gantry abuts against the first limiting structure to realize the linkage between the secondary moving gantry and the primary moving gantry and rise synchronously driven by the synchronous belt.

2. The gantry type two-stage lifting mechanism according to claim 1, characterized in that: The upper end of the fixed gantry is provided with a driving pulley, and the lower end is provided with at least one fixed tensioning mechanism; wherein the driving pulley is connected to the driving structure; The upper end of the first-stage movable gantry is provided with a driven pulley, and the lower end is provided with a reversing wheel; The synchronous belt is respectively wound around the driving pulley, the fixed tensioning mechanism, the driven pulley and the reversing wheel in sequence to form a closed ring belt.

3. The gantry type two-stage lifting mechanism according to claim 2, characterized in that: The fixed gantry includes two vertical fixed gantry frames and a crossbeam; The driving structure includes a motor and a driving shaft, which are respectively arranged on the crossbeam; The active pulley has at least one, which is arranged at the upper end of the fixed gantry frame and connected to the driving shaft.

4. The gantry type two-stage lifting mechanism according to claim 3, characterized in that: The first-level movable gantry includes two vertical first-level movable gantry frames, wherein the first-level movable gantry frames are slidably arranged in the fixed gantry frames, and the two are slidably matched through a first guide rail slider structure.

5. The gantry type two-stage lifting mechanism according to claim 4, characterized in that: The first guide rail slider structure includes at least one slider on the inner side of the fixed gantry frame, and a linear guide rail on the outer side of the primary movable gantry frame.

6. The gantry type two-stage lifting mechanism according to claim 4, characterized in that: It also includes a second limiting structure, which is a fixed portal frame limiting block, which is arranged on the inner side of the upper end of the fixed portal frame.

7. The gantry type two-stage lifting mechanism according to claim 6, characterized in that: The upper and lower ends of the outer side of the first-stage movable gantry frame are respectively provided with a first-stage gantry lowering block and a first-stage gantry rising block which can abut and limit the fixed gantry limit block.

8. The gantry type two-stage lifting mechanism according to claim 4, characterized in that: The secondary movable gantry is connected to the primary movable gantry frames on both sides through a second guide rail slider structure; the two sides of the secondary movable gantry are connected to the driving pulley through a synchronous pulley pressure plate.

9. The gantry-type two-stage lifting mechanism according to any one of claims 4 to 8, characterized in that: The first limiting structure includes a load-bearing limit block located on the inner side of the upper end of the first-level moving gantry frame; oil pressure buffers are provided at both ends of the second-level moving gantry; wherein, when the second-level moving gantry rises to a first extreme position relative to the first-level moving gantry, the oil pressure buffers at both ends of the second-level moving gantry abut against the load-bearing limit block.

10. The gantry type two-stage lifting mechanism according to claim 9, characterized in that: A secondary gantry lowering limit block is provided on the inner side of the lower end of the primary moving gantry frame; secondary gantry lowering blocks are provided at both ends of the secondary moving gantry; when the secondary moving gantry descends to the second extreme position relative to the primary moving gantry, the secondary gantry lowering block abuts against the secondary gantry lowering limit block.

11. A mobile handling device, comprising a lifting mechanism, characterized in that: The lifting mechanism is a gantry-type two-stage lifting mechanism as described in any one of claims 1-10.

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