Lifting device and handling fork lift for film reels

Abstract

The application discloses a lifting device and a carrying forklift for a film reel, and relates to the technical field of forklifts. The lifting device comprises a lifting frame which can slide in a height direction, a first support and a second support which are arranged on the lifting frame and can slide, and the first support and the second support are respectively used for supporting two ends of a workpiece; a first supporting oil cylinder and a second supporting oil cylinder, one end of the first supporting oil cylinder is connected with the lifting frame, the other end of the first supporting oil cylinder is connected with the first support, one end of the second supporting oil cylinder is connected with the lifting frame, and the other end of the second supporting oil cylinder is connected with the second support; a rod cavity of the first supporting oil cylinder can be communicated with a rod cavity of the second supporting oil cylinder, and / or a rodless cavity of the first supporting oil cylinder can be communicated with a rodless cavity of the second supporting oil cylinder. In the application, the first supporting oil cylinder and the second supporting oil cylinder can be controlled in linkage, so that the first support and the second support can simultaneously support the two ends of the workpiece, and the first supporting oil cylinder and the second supporting oil cylinder can be controlled individually, so that the center hole of the workpiece is aligned with a rod piece.

Description

Technical Field

[0001] This invention relates to the field of material handling equipment technology, and more particularly to a lifting device and a forklift for handling film rolls. Background Technology

[0002] When transporting products, the product must first be lifted from its current location, then transported to another location, and finally placed in that location.

[0003] Especially for situations where a rod needs to pass through the product at each location to secure it, a support device is first needed to support both ends of the product so that the rod can be removed from the product, and then the product can be lifted away from its current position for transportation. After transportation to the designated location, the rod needs to be inserted into the product for securing it, and finally the support device is released to complete the transportation.

[0004] However, in existing support devices, the two supports used to support the two ends of the product are at the same height and rise and fall synchronously. When the heights of the two ends of the product are inconsistent, the support device supports the product from bottom to top, but only one support can support the lower end of the product. The other support cannot support the product, which can easily cause the product to rotate relative to the rod, causing the rod to get stuck between the product and the product, ultimately preventing the rod from being removed from the product. At the same time, when placing the product, it is impossible to adjust the height of the two ends of the product separately, making it impossible to align the rod with the center hole of the product, and the rod cannot be inserted into the product for fixation. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a lifting device and a forklift for handling film rolls, so as to solve the problem that the support device cannot adjust the height of both ends of the product individually, resulting in the rods being unable to extend into or out of the product.

[0006] The technical solution adopted by this invention to solve its technical problem is a lifting device, comprising:

[0007] A lifting frame that can slide along the height direction, wherein a first bracket and a second bracket are slidably provided on the lifting frame, the first bracket and the second bracket being used to support the two ends of the workpiece respectively;

[0008] A first support cylinder and a second support cylinder, wherein one end of the first support cylinder is connected to the lifting frame and the other end is connected to the first bracket, and one end of the second support cylinder is connected to the lifting frame and the other end is connected to the second bracket;

[0009] The rod chamber of the first support cylinder can communicate with the rod chamber of the second support cylinder, and / or the rodless chamber of the first support cylinder can communicate with the rodless chamber of the second support cylinder.

[0010] Furthermore, a switching valve is provided for connecting or disconnecting the rod-side chamber and / or rodless chamber of the first support cylinder and the second support cylinder.

[0011] Furthermore, the first support cylinder is located in the first oil circuit, the second support cylinder is located in the second oil circuit, the first oil circuit and the second oil circuit are connected through a third oil circuit, and the switching valve is located in the third oil circuit.

[0012] Furthermore, it also includes an oil pump cylinder, which is connected to either the first support cylinder or the second support cylinder.

[0013] Furthermore, it also includes a multi-way valve, which has a first connection end, a second connection end, and a third connection end. The multi-way valve can connect the first connection end and the second connection end, or connect the first connection end and the third connection end. The first connection end is connected to the pump oil cylinder, the second connection end is connected to the first support oil cylinder, and the third connection end is connected to the second support oil cylinder.

[0014] Furthermore, it also includes a transmission assembly, which includes a worm gear and a worm wheel meshing with the worm gear, the worm gear being connected to the telescopic rod of the oil pump cylinder.

[0015] Furthermore, it also includes a drive motor, the output shaft of which is connected to the worm gear.

[0016] Furthermore, a torque limiter is provided between the drive motor and the worm gear to allow the drive motor to connect or disconnect from the worm gear.

[0017] Furthermore, both the first bracket and the second bracket are U-shaped.

[0018] Furthermore, a forklift for handling film rolls is also disclosed, including the aforementioned lifting device, wherein the lifting frame is slidably connected to the mast of the forklift.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] (1) A first support and a second support are provided on the lifting frame to support the two ends of the workpiece, respectively. A first support cylinder and a second support cylinder are also provided to drive the first support and the second support, respectively, so that the rod chambers and rodless chambers of the two support cylinders are connected. One of the supports first abuts against one end of the workpiece, thereby creating a pressure difference between the two support cylinders. This pressure difference drives the oil in the cylinder with higher oil pressure to be pumped into the cylinder with lower oil pressure, thereby driving the cylinder with lower oil pressure to extend and drive the other support to abut against the workpiece, thus achieving support. This continues until the oil pressures of the two cylinders are equal, so that the first support and the second support can simultaneously support both ends of the workpiece.

[0021] (2) The two support cylinders can be controlled independently. When placing the workpiece, the height of both ends of the workpiece is adjusted to the corresponding position so that the rod can smoothly extend into the center hole of the workpiece. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the forklift used in the embodiment;

[0023] Figure 2 This is a schematic diagram of the lifting device in the embodiment;

[0024] In the picture:

[0025] 100. Lifting frame;

[0026] 200. First support; 210. Second support;

[0027] 300. First support cylinder; 310. Second support cylinder;

[0028] 400. Drive motor; 410. Torque limiter;

[0029] 500. Oil pump cylinder;

[0030] 600. Workpiece;

[0031] 700. Gantry. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0033] Please refer to Figures 1-2 The present invention discloses a lifting device, comprising:

[0034] A lifting frame 100 that can slide along the height direction is provided with a first bracket 200 and a second bracket 210 slidably on the lifting frame 100. The first bracket 200 and the second bracket 210 are respectively used to support the two ends of the workpiece 600.

[0035] A first support cylinder 300 and a second support cylinder 310 are provided. One end of the first support cylinder 300 is connected to the lifting frame 100 and the other end is connected to the first bracket 200. One end of the second support cylinder 310 is connected to the lifting frame 100 and the other end is connected to the second bracket 210.

[0036] The rod chamber of the first support cylinder 300 can communicate with the rod chamber of the second support cylinder 310, and / or the rodless chamber of the first support cylinder 300 can communicate with the rodless chamber of the second support cylinder 310.

[0037] First, it should be noted that this application is for a working condition in which the rod used to fix the workpiece 600 needs to be removed from the center hole of the workpiece 600 before handling.

[0038] Specifically, the lifting frame 100 is equipped with a first support 200 and a second support 210 to support the two ends of the workpiece 600, respectively. A first support cylinder 300 and a second support cylinder 310 are also provided, driving the first support 200 and the second support 210 respectively, connecting the rod-side chambers and the rodless chambers of the two support cylinders. When the two ends of the workpiece 600 are at different heights, the lifting frame 100 drives the first support 200 and the second support 210 to rise synchronously until one support supports the lower end of the workpiece 600, at which point the other support separates from the higher end of the workpiece 600. The lifting frame 100 continues to rise, and the workpiece 600 abuts against one of the supports, causing the telescopic rod of the corresponding support cylinder to retract. This causes a change in oil pressure within the cylinder, which drives the other support cylinder to extend, raising the other support to abut against the higher end of the workpiece 600. Ultimately, both supports simultaneously support the two ends of the workpiece 600. This prevents the workpiece 600 from rotating and getting stuck with the rods, thus preventing the rods from retracting.

[0039] More specifically, the hydraulic cylinder includes a cylinder body, a piston, and a telescopic rod connected to the piston. The piston divides the internal space of the cylinder body into two chambers: the rod chamber, which is one containing the telescopic rod, and the rodless chamber, which is the other without the telescopic rod. When one of the supports abuts against one end of the workpiece 600 and the lifting frame 100 continues to rise, the telescopic rod of the support cylinder corresponding to that support retracts. At this time, the oil pressure in the rodless chamber increases, and the oil pressure in the rod chamber decreases. Consequently, the oil in the rodless chamber of the first support cylinder is pumped into the rodless chamber of the second support cylinder, and the oil in the rod chamber of the second support cylinder is drawn into the rod chamber of the first support cylinder. This causes the telescopic rod of the second support cylinder to extend, and drives its corresponding support to rise until it supports the higher end of the workpiece 600. At this point, the oil pressure in the two support cylinders is equal, and pumping or drawing oil ceases, maintaining stable support.

[0040] Compared to the scheme of simultaneous lifting of two supports, the height of the two supports in this application can be adjusted independently, so that the two supports support the two ends of the workpiece 600 respectively, and the rod can be smoothly withdrawn.

[0041] This application utilizes a method where one of the supports first abuts against one end of the workpiece 600, creating a hydraulic pressure difference between the two support cylinders. This pressure difference drives oil from the cylinder with higher pressure to the cylinder with lower pressure, causing the lower-pressure cylinder to extend and move, thus bringing the other support against the workpiece 600 for support. Stable support is maintained until the hydraulic pressures of the two cylinders are equal. The magnitude of the pressure difference determines the pumping volume, which in turn determines the extension of the other support cylinder, and consequently, the lifting height of the other support.

[0042] Compared to a scheme where two independent hydraulic cylinders drive two supports, this application eliminates the need for detectors or other components to determine the height of the two supports. When the lifting frame 100 rises, one of the supports will inevitably come into contact with the workpiece 600 first, causing the corresponding support cylinder to pump oil into the other support cylinder. Ultimately, the other support is lifted until it comes into contact with the workpiece 600. In other words, regardless of the height difference between the two ends of the workpiece 600, no judgment or adjustment of the support height is required. Simply raising the lifting frame 100 will ensure that both supports simultaneously support both ends of the workpiece 600.

[0043] Furthermore, a switching valve is provided for connecting or disconnecting the rod-side chamber and / or rodless chamber of the first support cylinder 300 and the second support cylinder 310.

[0044] Specifically, once the oil pressure of the two support cylinders is balanced (equal), the switch valve can be closed to disconnect the oil circuit between the two support cylinders. This prevents the center of gravity of the workpiece 600 from shifting due to bumps during transportation, which could cause the force on one end of the support cylinder to be greater than that on the other end, leading to continuous extension and retraction of the two support cylinders during transportation, ultimately causing the workpiece 600 to shake or even fall off.

[0045] Furthermore, the first support cylinder 300 is located in the first oil circuit, the second support cylinder 310 is located in the second oil circuit, the first oil circuit and the second oil circuit are connected through a third oil circuit, and the switching valve is located in the third oil circuit.

[0046] Furthermore, it also includes an oil pump cylinder 500, which is connected to the first support cylinder 300 or the second support cylinder 310.

[0047] Specifically, by extending and retracting the oil pump cylinder 500, a fixed amount of oil is pumped out into the first support cylinder 300 or the second support cylinder 310, so as to achieve precise individual adjustment of the two support cylinders.

[0048] Furthermore, it also includes a multi-way valve, which has a first connection end, a second connection end, and a third connection end. The multi-way valve can connect the first connection end and the second connection end, or connect the first connection end and the third connection end. The first connection end is connected to the pump oil cylinder 500, the second connection end is connected to the first support oil cylinder 300, and the third connection end is connected to the second support oil cylinder 310.

[0049] By selecting whether the first connection end and the second connection end of the multi-way valve are connected, or whether the first connection end and the third connection end are connected, the adjustment of the pump oil cylinder 500 on the first support cylinder 300 or the second support cylinder 310 can be switched.

[0050] Specifically, when placing workpiece 600, the height of both ends of workpiece 600 needs to be adjusted to the corresponding positions so that the rod can smoothly extend into the central hole of workpiece 600. Only then can the two support cylinders be released to fix workpiece 600. The individual control of the two support cylinders can be achieved by connecting the first connecting end of the multi-way valve to the corresponding port.

[0051] Furthermore, it also includes a transmission assembly, which includes a worm gear and a worm wheel meshing with the worm gear, the worm gear being connected to the telescopic rod of the oil pump cylinder 500.

[0052] Furthermore, it also includes a drive motor 400, the output shaft of which is connected to the worm gear.

[0053] Specifically, the drive motor 400 rotates, which drives the worm gear to rotate, and in turn drives the worm to extend and retract. The worm drives the extension rod to extend and retract, so that the pump oil cylinder 500 can generate different oil pressures, thereby realizing the control of the first support cylinder 300 and the second support cylinder 310.

[0054] Furthermore, a torque limiter 410 is provided between the drive motor 400 and the worm gear to allow the drive motor 400 to connect or disconnect from the worm gear.

[0055] A torque limiter 410 is provided so that when the torque of the output shaft of the drive motor 400 exceeds the set value, the connection between the drive motor 400 and the worm gear can be disconnected to prevent the drive motor 400 from continuing to rotate when the cylinder is extended to its longest length or retracted to its shortest length (unable to extend or retract further), which would cause the output shaft torque to be too large and damage it.

[0056] Furthermore, both the first support 200 and the second support 210 are U-shaped.

[0057] Furthermore, a forklift for handling film rolls is also disclosed, including the aforementioned lifting device, wherein the lifting frame 100 is slidably connected to the mast 700 of the forklift.

[0058] Specifically, this application applies to the unloading, transporting, and loading of film rolls.

[0059] During material unloading, the switch valve opens, connecting the oil chambers of the first support cylinder 300 and the second support cylinder 310, enabling the first bracket 200 and the second bracket 210 to simultaneously support both ends of the film roll, thus allowing the rod to smoothly exit the central hole in the middle of the film roll. Subsequently, the lifting frame 100 continues to lift, achieving material unloading.

[0060] During transportation, a forklift moves the lifting frame 100 to transfer the film roll.

[0061] During feeding, the switch valve is closed, the multi-way valve is opened and the corresponding port is selected for conduction, realizing the individual control of the first support cylinder 300 and the second support cylinder 310, so that the two ends of the film roll are adjusted to the corresponding heights respectively, allowing the rod to smoothly pass into the central hole to fix the film roll.

[0062] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0063] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A lifting device, characterized in that, include: A lifting frame that can slide along the height direction, wherein a first bracket and a second bracket are slidably provided on the lifting frame, the first bracket and the second bracket being used to support the two ends of the workpiece respectively; A first support cylinder and a second support cylinder, wherein one end of the first support cylinder is connected to the lifting frame and the other end is connected to the first bracket, and one end of the second support cylinder is connected to the lifting frame and the other end is connected to the second bracket; The rod chamber of the first support cylinder can communicate with the rod chamber of the second support cylinder, and / or the rodless chamber of the first support cylinder can communicate with the rodless chamber of the second support cylinder. It is also equipped with a switching valve for connecting or disconnecting the rod chamber and / or rodless chamber of the first support cylinder and the second support cylinder; It also includes an oil pump cylinder, which is connected to the first support cylinder or the second support cylinder; It also includes a multi-way valve, which has a first connection end, a second connection end and a third connection end. The multi-way valve can connect the first connection end and the second connection end, or connect the first connection end and the third connection end. The first connection end is connected to the pump oil cylinder, the second connection end is connected to the first support oil cylinder, and the third connection end is connected to the second support oil cylinder.

2. The lifting device according to claim 1, characterized in that, The first support cylinder is located in the first oil circuit, the second support cylinder is located in the second oil circuit, the first oil circuit and the second oil circuit are connected through a third oil circuit, and the switching valve is located in the third oil circuit.

3. A lifting device according to claim 1, characterized in that, It also includes a transmission assembly, which includes a worm gear and a worm wheel meshing with the worm gear, the worm gear being connected to the telescopic rod of the oil pump cylinder.

4. A lifting device according to claim 3, characterized in that, It also includes a drive motor, the output shaft of which is connected to the worm gear.

5. A lifting device according to claim 4, characterized in that, A torque limiter is provided between the drive motor and the worm gear to allow the drive motor to connect or disconnect from the worm gear.

6. A lifting device according to claim 1, characterized in that, Both the first bracket and the second bracket are U-shaped.

7. A forklift for handling film rolls, characterized in that, It includes the lifting device as described in any one of claims 1-6, and the lifting frame is slidably connected to the mast of the forklift.

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