Ultralow hydraulic lifting device

Abstract

According to the ultra-low type hydraulic lifting device, the vehicle body structure design that pit digging is avoided, a cage trolley is loaded at a low position, and then jacking conveying is achieved is provided in a targeted mode, so that the transfer efficiency of the cage trolley and the stability in the lifting process are improved, and the equipment cost and the control difficulty are reduced on the premise that the occupied space is reduced. Comprising at least one cage trolley guide assembly, and a lifting trolley runs on one side of the cage trolley guide assembly; the lifting trolley comprises a lifting table top and a shear fork assembly which are in vertical driving connection through a hydraulic cylinder assembly, the shear fork assembly is integrally installed in the bottom frame assembly, the top end of the shear fork assembly is connected with the lifting table top through a pin shaft, and the bottom end of the shear fork assembly is in contact connection with the inner surface of the bottom frame assembly through a supporting wheel; the walking guide assembly is connected with the underframe assembly, and the drag chain hydraulic station assembly is connected to one side of the walking guide assembly.

Description

Technical Field

[0001] The utility model relates to a novel hydraulic lifting device applied to cage truck transfer operations, belonging to the field of logistics and intelligent warehousing. Background Art

[0002] At present, in intelligent logistics transfer yards and three-dimensional warehousing systems, cage trucks are usually used for containerization and transportation to cope with bulk packages of different shapes and sizes, so as to complete automatic loading and unloading and conveying operations between the storage area and the sorting area.

[0003] In the process of internal circulation of cage trucks in various logistics transfer yards, it is generally carried out through automated logistics conveyor lines to complete directional transfer. Therefore, how to effectively and quickly implement loading and unloading has become the primary technical issue faced. The main methods are as follows:

[0004] One is lifting and conveying, that is, first place the cage car on the top of the lifting and conveying equipment, then lift it to the same height as the conveying line by the corresponding equipment, and finally transfer it to the conveying line by docking; therefore, this method requires the cage car to be placed at a designated position for lifting and transporting, and then lift the cage car through the gantry mechanism, and then transport it to the conveying line. The transportation efficiency is low, the space occupied is large, and the equipment cost of the gantry mechanism is also high;

[0005] The other is lifting and transportation, which requires digging a deep pit on the workshop floor to install jacking and conveying equipment. This requires major modifications to the logistics site, and the corresponding jacking and conveying equipment is costly and complicated to maintain.

[0006] In view of this, this patent application is proposed. Utility Model Content

[0007] The ultra-low hydraulic lifting device described in the utility model aims to solve the problems existing in the above-mentioned prior art, and specifically proposes a vehicle body structure design that avoids digging a pit, loads the cage car at a low position and then realizes jacking and transportation, so as to improve the transfer efficiency of the cage car and the stability during the lifting process, and reduce the equipment cost and operation difficulty while reducing the occupied space.

[0008] To achieve the above-mentioned design purpose, the ultra-low hydraulic lifting device includes at least one group of cage car guide components, and a lifting trolley is running on one side of the cage car guide component; the lifting trolley includes a lifting table and a scissors fork assembly connected by a vertical drive of a hydraulic cylinder assembly, the scissors fork assembly is installed as a whole inside the base frame assembly, the top end of the scissors fork assembly is connected to the lifting table through a pin shaft, and the bottom end of the scissors fork assembly is connected to the inner surface of the base frame assembly through a support wheel; the drag chain hydraulic station assembly is driven and connected to one side of the base frame assembly.

[0009] Furthermore, a guard shield and a travel guide guard shield are fixedly connected in sequence to the side of the chassis assembly, and the drag chain hydraulic station assembly is driven and connected to one side of the travel guide guard shield in a horizontal direction through the travel guide assembly.

[0010] Furthermore, the base frame assembly includes a bottom frame for supporting all components, the servo motor assembly is installed inside the bottom frame, the output end of the servo motor assembly is connected to the driving shaft with two end shafts arranged on both sides of the bottom frame through a master and slave sprocket assembly, and walking wheels are arranged at both ends of the driving shaft through a seat bearing shaft.

[0011] Furthermore, a top screw block whose top can be embedded in a chain buckle of a transmission chain is fixedly sleeved on the driving shaft.

[0012] Furthermore, a lifting detection device equipped with two sets of proximity switches is arranged on the inner side of the bottom frame.

[0013] Furthermore, the scissors fork assembly includes two groups of double scissor arms, the middle parts of the two groups of double scissor arms are hinged to a group of single scissor arms through a hinge shaft, and the corresponding ends of the two groups of double scissor arms on the same side are fixedly connected by a connecting beam; one end of each group of double scissor arms is axially provided with a walking wheel group that contacts and rolls on the base frame assembly and the lifting platform, and the other end of each group of double scissor arms is fixedly connected to the base frame assembly and the lifting platform.

[0014] Furthermore, fine-pitch round nuts matched with oil-free bushings are respectively locked and packaged on the outer sides of the double scissor arms and on both side ends of the hinge shaft.

[0015] Furthermore, the hydraulic cylinder assembly includes a hydraulic cylinder body and two groups of piston rods extending on both sides, each group of piston rods is axially fixedly connected to a connecting block; one group of connecting blocks is axially sleeved with a pin shaft for connecting the scissors fork assembly through an oil-free bushing, and the other group of connecting blocks is axially sleeved with a tail pin shaft for fixedly connecting the base frame assembly through an oil-free bushing, and an elastic retaining ring is sleeved at the fixed connection between the tail pin shaft and the base frame assembly.

[0016] Furthermore, the walking guide assembly includes a guide frame, a connecting shaft is provided on both sides of the guide frame through a supporting and limiting horizontal axis, and walking wheels are sleeved on both ends of the connecting shaft; an array of guide wheels are symmetrically arranged on the outer side of the guide frame, and the guide wheels are rotatably contacted and supported on the inner side of the base frame assembly.

[0017] Furthermore, two groups of cage trolley guide components are symmetrically arranged, including a plurality of guide columns distributed along two horizontal sides, the bottom of the guide columns is fixed to the ground, and the guide columns on each side are provided with vertically arranged through holes.

[0018] In summary, the above ultra-low hydraulic lifting device has the following advantages and beneficial effects:

[0019] 1. The overall structure of the trolley proposed in this application adopts an embedded design, which can reach the operating height of the conventional lifting platform in the prior art without the need to dig a pit in advance, and correspondingly increases the lifting height of the cage car, which is conducive to further improving the efficiency of cage car transfer operations;

[0020] 2. The guide frame proposed in this application is equipped with an array guide mechanism on the side, which effectively improves the stability of the cage car during the lifting process, and can avoid the occurrence of problems such as deviation during the lateral movement of the trolley and collision due to side sliding of the cage car.

[0021] 3. The present application adopts a scissor fork with a transmission mechanism driven by a hydraulic cylinder, which significantly improves the lifting fulcrum and vertex distribution effect, thereby significantly reducing the overall height of the trolley and making full use of the space layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application will now be further described with reference to the following drawings;

[0023] Figure 1 It is a schematic diagram of using the ultra-low hydraulic lifting device described in this application to implement cage truck transportation;

[0024] Figure 2 It is a structural diagram of an ultra-low hydraulic lifting device;

[0025] Figure 3 is a schematic diagram of the structure of the chassis assembly;

[0026] Figure 4 It is a structural diagram of the scissor fork mechanism;

[0027] Figure 5 It is a schematic diagram of the structure of the hydraulic cylinder assembly;

[0028] Figure 6 It is a structural schematic diagram of the walking guide assembly;

[0029] Figure 7 It is a structural diagram of the drag chain hydraulic station components;

[0030] Figure 8 It is a structural schematic diagram of the cage car guide assembly; DETAILED DESCRIPTION

[0031] Embodiment 1, as Figure 1 As shown, the present application proposes an ultra-low hydraulic lifting device 1-02, which is used to carry a cage car 1-01 for transfer to the conveying surface of a chain conveyor 1-03. During the transfer process, the straight section guide component 1-04 can implement single-side or double-side horizontal guidance of the cage car 1-01.

[0032] like Figure 2As shown, the ultra-low hydraulic lifting device 1-02 includes two groups of symmetrically distributed cage guide components 2-01 for providing cage guide positioning, and a lifting trolley is arranged between the two groups of cage guide components 2-01; the lifting trolley includes a lifting table 2-02 and a scissor fork component 2-09 connected by a vertical drive of a hydraulic cylinder component 2-07, and the scissor fork component 2-09 is integrally installed inside the chassis component 2-08, and the top of the scissor fork component 2-09 is connected to the lifting table 2-02 by a pin shaft, and the bottom of the scissor fork component 2-09 is connected to the inner surface of the chassis component 2-08 through a support wheel contact; a guard 2-03 and a walking guide guard 2-04 are fixedly connected to the side of the chassis component 2-08 in sequence, and the drag chain hydraulic station component 2-05 is connected to one side of the walking guide guard 2-04 by a horizontal drive through the walking guide component 2-06;

[0033] like Figure 3 As shown, the bottom frame assembly 2-08 includes a bottom frame 3-06 for supporting all components, and the servo motor assembly 3-07 is supported and installed inside the bottom frame 3-06 through a motor seat 3-05. The output end of the servo motor assembly 3-07 is connected to the driving shaft 3-03 with two end shafts arranged on both sides of the bottom frame 3-06 through a master-slave sprocket assembly 3-04. Traveling wheels 3-02 are arranged at both ends of the driving shaft 3-03 through seat bearing shafts. When the driving shaft 3-03 rotates, it drives the traveling wheels 3-02 to operate so that the lifting trolley can run along the bottom track as a whole. Similarly, the driven shaft 3-01 with another set of traveling wheels 3-02 arranged on both ends of the shafts is connected to both sides of the bottom frame 3-06.

[0034] A top screw block 3-04 is fixedly sleeved on the driving shaft 3-03, and the top of the top screw block 3-04 can be embedded in each chain link of the transmission chain. The top screw block 3-04 rotates with the driving shaft 3-03 and tightens the chain to ensure the smooth performance of the lifting trolley during the walking process;

[0035] A lifting detection device 3-09 equipped with two sets of proximity switches is arranged on the inner side of the bottom frame 3-06 to detect the lifting status and real-time vertical height of the scissor fork assembly 2-09, including whether the lifting platform 2-02 has reached the vertical highest point and whether it has reached the vertical lowest point, and then give the control system a lifting signal.

[0036] like Figure 4 As shown, the scissor fork assembly 2-09 includes two sets of double scissor arms 4-02, the middle parts of the two sets of double scissor arms 4-02 are hinged to a set of single scissor arms 4-02 through a hinge shaft 4-05, and the corresponding ends of the two sets of double scissor arms 4-02 on the same side are fixedly connected through a connecting beam 4-03;

[0037] One end of each set of double scissor arms 4-02 is axially provided with a walking wheel set 4-04 that contacts and rolls on the base frame assembly 2-08 and the lifting platform 2-02, and the other end of each set of double scissor arms 4-02 is fixedly connected to the base frame assembly 2-08 and the lifting platform 2-02 through an axial hole 4-07 and components such as a pin shaft and a bushing.

[0038] A set of fine-pitch round nuts 4-06 connected with oil-free bushings are respectively locked and encapsulated on the outside of the double scissor arms 4-02 and on both side ends of the hinge shaft 4-05.

[0039] like Figure 5 As shown, the hydraulic cylinder assembly 2-07 includes a hydraulic cylinder body 5-01 and two groups of piston rods extending from both sides, each group of piston rods is axially fixedly connected to a connecting block 5-02; one group of connecting blocks 5-02 is axially sleeved with a pin shaft 5-03 for connecting the scissors fork assembly 2-09 through an oil-free bushing 5-04, and the other group of connecting blocks 5-02 is axially sleeved with a tail pin shaft 5-05 for fixedly connecting the base assembly 2-08 through an oil-free bushing 5-04, and an elastic retaining ring 5-06 is sleeved at the fixed connection between the tail pin shaft 5-05 and the base assembly 2-08 to achieve limiting between the two.

[0040] like Figure 6 As shown, the walking guide assembly 2-06 includes a guide frame 6-01, a connecting shaft 6-05 is horizontally axially arranged on both sides of the guide frame 6-01 through a support limiter 6-04, and walking wheels 6-02 are sleeved on both ends of the connecting shaft 6-05; 6 groups of guide wheels 6-03 are symmetrically arranged on the outer side of the guide frame 6-01, and the guide wheels 6-03 are rotatably contacted and supported on the inner side of the base frame assembly 2-08 to provide guidance and limitation during the horizontal walking of the lifting trolley;

[0041] A ruler wheel diverter 6-06 is installed inside the guide frame 6-01 for detecting the telescopic stroke of the two groups of piston rods of the hydraulic cylinder assembly 2-07, so as to effectively monitor and control the synchronous telescopic action of the two groups of piston rods.

[0042] like Figure 7 As shown, the drag chain hydraulic station assembly 2-05 includes a hydraulic station 7-02 whose output end is driven and connected to one side of the drag chain 7-04. The hydraulic station 7-02 is integrally arranged in the inner space of the drag chain 7-04 where it is bent and wound, so that the space occupied by the device can be significantly reduced; the drag chain 7-04 is integrally placed on the drag chain support plate 7-03, and the drag chain support plate 7-03 provides lateral support for the horizontally connected drag chain 7-04 to prevent the drag chain from sagging and rubbing against the ground. The two ends of the drag chain 7-04 are respectively connected with a first fixing plate 7-01 and a second fixing plate 7-05 for fixing.

[0043] like Figure 8As shown, the cage trolley guide assembly 2-01 includes an array of guide columns 8-01 distributed along both sides horizontally, the bottom of the guide columns 8-01 is fixed to the ground by expansion bolts 8-04, and the guide columns 8-01 on each side are provided with vertically arranged through holes, and the guide rods 8-02 are locked in the through holes by bolts and nuts and are adjustably connected up and down between multiple groups of guide columns 8-01 on the same side, so that the guide rods 8-02 can provide contact with the cage trolley 1-01 and reduce friction resistance while adjusting their own guide height.

[0044] Based on the structural features of the above-mentioned lifting device, the cage car 1-01 enters the waiting position through the cage car guide assembly 2-01, and the servo motor assembly 3-07 lifts the trolley as a whole to the bottom of the cage car 1-01; the hydraulic cylinder assembly 2-07 carries the cage car 1-01 to rise to the specified height, and then the servo motor assembly 3-07 continues to drive the cage car 1-01 to run horizontally to the top of the conveyor line chain conveyor 1-03, and the hydraulic cylinder assembly 2-07 drives the cage car 1-01 to fall on the conveyor line chain conveyor 1-03, and the lifting trolley can return to the waiting position, thereby completing the cage car transfer process.

[0045] The above contents and the embodiments given in the accompanying drawings are only preferred solutions for achieving the purpose of the utility model. For those skilled in the art, they can be inspired by this and directly deduce other alternative structures that conform to the design concept of the utility model. Other structural features obtained thereby should also belong to the scope of the solution described in the utility model.

Claims

1. An ultra-low hydraulic lifting device, characterized in that: It includes at least one set of cage guide components, and a lifting trolley runs on one side of the cage guide components; The lifting trolley includes a lifting table and a scissors fork assembly connected by a hydraulic cylinder assembly. The scissors fork assembly is installed as a whole inside the base frame assembly. The top end of the scissors fork assembly is connected to the lifting table through a pin shaft, and the bottom end of the scissors fork assembly is connected to the inner surface of the base frame assembly through support wheels; the walking guide assembly is connected to the base frame assembly through bolts, and the drag chain hydraulic station assembly is connected to one side of the walking guide assembly.

2. The ultra-low hydraulic lifting device according to claim 1 is characterized in that: A guard shield and a travel guide guard shield are fixedly connected in sequence to the side of the chassis assembly, and the drag chain hydraulic station assembly is driven and connected to one side of the travel guide guard shield in a horizontal direction through the travel guide assembly.

3. The ultra-low hydraulic lifting device according to claim 1 or 2, characterized in that: The chassis assembly includes a bottom frame for supporting all components, the servo motor assembly is installed inside the bottom frame, the output end of the servo motor assembly is connected to the drive shaft on both sides of the bottom frame through a master and slave sprocket assembly, and walking wheels are provided at both ends of the drive shaft through a seat bearing shaft.

4. The ultra-low hydraulic lifting device according to claim 3 is characterized in that: A top screw block is fixedly sleeved on the driving shaft.

5. The ultra-low hydraulic lifting device according to claim 3 is characterized in that: A lifting detection device equipped with two sets of proximity switches is arranged on the inner side of the bottom frame.

6. The ultra-low hydraulic lifting device according to claim 3 is characterized in that: The scissor fork assembly comprises a set of double scissor arms, the middle part of the double scissor arms is hinged to two sets of single scissor arms through a hinge shaft, and the corresponding ends on the same side of the double scissor arms are fixedly connected through two sets of connecting beams; One end of the double scissor arm is respectively provided with a walking wheel group which contacts and rolls on the base frame assembly and the lifting platform, and the other end is respectively fixedly connected to the base frame assembly and the lifting platform.

7. The ultra-low hydraulic lifting device according to claim 6, characterized in that: Fine-thread round nuts matched with oil-free bushings are respectively locked and packaged on the outer sides of the double scissor arms and on both side ends of the hinged shaft.

8. The ultra-low hydraulic lifting device according to claim 1, characterized in that: The hydraulic cylinder assembly includes a hydraulic cylinder body and two groups of piston rods extending on both sides, each group of piston rods is axially fixedly connected to a connecting block; one group of connecting blocks is axially sleeved with a pin shaft for connecting the scissors fork assembly through an oil-free bushing, and the other group of connecting blocks is axially sleeved with a tail pin shaft for fixedly connecting the base frame assembly through an oil-free bushing, and an elastic retaining ring is sleeved at the fixed connection between the tail pin shaft and the base frame assembly.

9. The ultra-low hydraulic lifting device according to claim 1, characterized in that: The walking guide assembly includes a guide frame, a connecting shaft is provided on both sides of the guide frame through a supporting and limiting horizontal axis, and walking wheels are sleeved on both ends of the connecting shaft; an array of guide wheels are symmetrically arranged on the outer side of the guide frame, and the guide wheels are rotatably contacted and supported on the inner side of the base frame assembly.

10. The ultra-low hydraulic lifting device according to claim 1, characterized in that: Two groups of cage guide components are symmetrically arranged, including a plurality of guide columns distributed along two horizontal sides, the bottom of the guide columns is fixed to the ground, and the guide columns on each side are provided with vertically arranged through holes.

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