A linear drive system

Abstract

The utility model provides a linear drive system, include: drive source, the drive source passes output end output thrust, integrated block, the first tubular cavity and second tubular cavity that communicate with each other are seted up in integrated block, the first end of first tubular cavity is located integrated block's outer surface, second end is located integrated block, the first end of second tubular cavity is located integrated block's outer surface, second end is located integrated block, the first end of first tubular cavity is connected with the output end of drive source, be equipped with oil cylinder component in second tubular cavity to constitute oil cylinder, the first end of second tubular cavity is as the output end of oil cylinder, exports linear drive force outward, wherein, the through -flow area of first tubular cavity is less than the effective action area of oil cylinder. The utility model can reduce the occupation of the installation space near the driven object, is suitable for more application scene, and the driving force is bigger, and the driving precision is higher.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic transmission technology, specifically to a linear drive system. Background Technology

[0002] In industrial applications requiring short-distance linear adjustment, electric cylinders and hydraulic cylinders are commonly used linear drive devices.

[0003] When using an electric cylinder for drive, the motor, reducer, and other components are located close to the cylinder body. When the drive output of the electric cylinder is connected to the object being driven, the entire cylinder occupies a significant amount of space near the object. In many applications, such as lithium battery rolling mills where electrode sheet thickness is adjusted by changing the roll gap, there isn't enough installation space at the location of the driven object. Furthermore, the driving force of the electric cylinder is limited, sometimes making it insufficient to meet adjustment requirements.

[0004] When using hydraulic cylinders for drive, a hydraulic station, pipelines, servo valves, etc., need to be set up, resulting in a complex structure, high cost, and a significant risk of oil leakage, which affects the continuous and efficient operation of production. Furthermore, the precision of hydraulic cylinder drive is insufficient to meet the high-precision requirements of scenarios such as electrode thickness adjustment. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a linear drive system that can reduce the space occupied near the driven object, is suitable for more application scenarios, and has a large driving force and high driving accuracy.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A linear drive system includes: a drive source that outputs thrust through an output end; an integrated block having a first cylindrical cavity and a second cylindrical cavity that are connected to each other, the first end of the first cylindrical cavity being located on the outer surface of the integrated block and the second end being located inside the integrated block, the first end of the second cylindrical cavity being located on the outer surface of the integrated block and the second end being located inside the integrated block, the first end of the first cylindrical cavity being connected to the output end of the drive source, and a hydraulic cylinder component being provided in the second cylindrical cavity to form a hydraulic cylinder, the first end of the second cylindrical cavity serving as the output end of the hydraulic cylinder, outputting linear drive force outward, wherein the flow area of ​​the first cylindrical cavity is smaller than the effective working area of ​​the hydraulic cylinder.

[0008] This invention utilizes an integrated block with two interconnected cylindrical cavities of different sizes. The larger cylindrical cavity serves as the cylinder barrel for a hydraulic cylinder. When a driving source applies thrust to the hydraulic oil in the smaller cylindrical cavity, a linear driving force is output outward through the cylinder. Therefore, the integrated block can be installed near the driven object, while the driving source can be located on the side of the integrated block, reducing the space occupied near the driven object and making it suitable for a wider range of applications. Furthermore, the design of the large and small cylindrical cavities increases the linear driving force and improves linear driving accuracy. In addition, compared to traditional hydraulic cylinder drive solutions, it features a simpler structure, lower cost, and higher reliability.

[0009] Furthermore, the drive source is an electric cylinder. Combining the inherent high driving precision of the electric cylinder, the driving precision of the linear drive system can be further improved.

[0010] Furthermore, after the first cylindrical cavity is connected to the drive source, a first end cap is provided at the first end of the first cylindrical cavity, and one end of the cylinder rod of the electric cylinder extends into the first cylindrical cavity through the rod hole of the first end cap. The cylinder rod of the electric cylinder directly applies thrust to the hydraulic oil in the first cylindrical cavity, and this tightly integrated structure effectively prevents hydraulic oil leakage.

[0011] Furthermore, a sealing ring is provided inside the rod hole of the first end cap, which can more effectively prevent hydraulic oil leakage.

[0012] Furthermore, the first cylindrical cavity and the second cylindrical cavity are connected by an oil passage opened inside the integrated block.

[0013] Furthermore, the cylinder component includes a movable rod and a second end cap, the second end cap being disposed at the first end of the second cylindrical cavity, and one end of the movable rod passing through the rod hole of the second end cap to output linear driving force outward.

[0014] Furthermore, the movable rod is a plunger, or the movable rod includes a piston and a piston rod.

[0015] Furthermore, the integrated block is also provided with an exhaust channel and an oil filling channel. The first end of the exhaust channel is located on the outer surface of the integrated block and the second end is connected to the second cylindrical cavity. The first end of the oil filling channel is located on the outer surface of the integrated block and the second end is connected to the second cylindrical cavity. Both the first end of the exhaust channel and the first end of the oil filling channel are provided with plugs.

[0016] Furthermore, the second end of the venting channel is connected to the top surface of the second cylindrical cavity, and the second end of the lubrication channel is connected to the bottom surface of the second cylindrical cavity. This design is suitable for adding or draining oil from the cavity of the integrated block.

[0017] Furthermore, the integrated block has multiple faces, and the face containing the first end of the first cylindrical cavity is neither the same as nor opposite to the face containing the first end of the second cylindrical cavity. This allows for a change in the driving direction of the linear drive system relative to the driving direction of the drive source, enabling the drive source to be located on the side of the direction of the driving force on the driven object, thereby significantly reducing the space occupied in the driving direction of the driven object. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a linear drive system according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the linear drive system according to an embodiment of the present invention from one perspective;

[0020] Figure 3 For along Figure 2 A sectional view cut along line AA.

[0021] Figure 4 For along Figure 2 A sectional view cut along the middle BB line;

[0022] Figure 5 This is a perspective view of an integrated block according to an embodiment of the present invention;

[0023] Figure 6 This is an exploded three-dimensional view of a linear drive system according to an embodiment of the present invention.

[0024] Figure label:

[0025] Drive source 1, integrated block 2, first cylindrical cavity 3, second cylindrical cavity 4, first end cover 5, cylinder rod of electric cylinder 6, sealing ring 7, movable rod 8, second end cover 9, oil passage 10, exhaust port 11, filling port 12, plug 13, mounting hole 14. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1 and Figure 2 As shown, the linear drive system of this embodiment includes a drive source 1 and an integrated block 2. The drive source 1 outputs thrust through its output terminal. Figure 3 , Figure 4 and Figure 5 As shown, the integrated block 2 has a first cylindrical cavity 3 and a second cylindrical cavity 4 that are connected to each other. The first end of the first cylindrical cavity 3 is located on the outer surface of the integrated block 2 and the second end is located inside the integrated block 2. The first end of the second cylindrical cavity 4 is located on the outer surface of the integrated block 2 and the second end is located inside the integrated block 2. The first end of the first cylindrical cavity 3 is connected to the output end of the drive source 1. The second cylindrical cavity 4 is provided with a hydraulic cylinder component to form a hydraulic cylinder. The first end of the second cylindrical cavity 4 serves as the output end of the hydraulic cylinder, outputting a linear driving force outward. The flow area of ​​the first cylindrical cavity 3 is smaller than the effective working area of ​​the hydraulic cylinder.

[0028] When hydraulic oil is injected into the first cylindrical cavity 3 and the second cylindrical cavity 4, the drive source 1 applies a thrust to the first cylindrical cavity 3. Since the second cylindrical cavity 4 is connected to the first cylindrical cavity 3, the pressure in the second cylindrical cavity 4 increases, causing the cylinder composed of its cylinder components to output a linear driving force outward.

[0029] Since the flow area of ​​the first cylindrical cavity 3 is smaller than the effective working area of ​​the oil cylinder, according to the hydraulic transmission theory, relative to the driving force and driving accuracy of the driving source 1, the linear driving force output by the output end of the oil cylinder will be amplified, and the driving accuracy will also be amplified.

[0030] In one embodiment of the present invention, the overall external shape of the integrated block 2 may be adapted to its installation or placement space. For example, in a specific embodiment of the present invention, the overall external shape of the integrated block 2 may be a cuboid.

[0031] According to an embodiment of the present invention, the linear drive system comprises two interconnected cylindrical cavities of different sizes within an integrated block. The larger cylindrical cavity serves as the cylinder barrel for the hydraulic cylinder. When a driving source applies thrust to the hydraulic oil in the smaller cylindrical cavity, a linear driving force is output outward through the cylinder. Therefore, the integrated block can be installed near the driven object, while the driving source can be located on the side of the integrated block, reducing the space occupied near the driven object and making it suitable for a wider range of applications. Furthermore, the design of the large and small cylindrical cavities increases the linear driving force and improves linear driving accuracy. In addition, compared to traditional hydraulic cylinder drive solutions, it features a simpler structure, lower cost, and higher reliability.

[0032] In one embodiment of this invention, the drive source 1 is an electric cylinder. By combining the design of large and small cylindrical cavities with an electric cylinder drive, the high driving accuracy of the electric cylinder itself is combined, which can further improve the driving accuracy of the linear drive system.

[0033] In other embodiments of this utility model, the drive source 1 may also be other linear drive mechanisms.

[0034] In one embodiment of this utility model, such as Figure 3 , Figure 5 and Figure 6 As shown, after the first cylindrical cavity 3 is connected to the drive source 1, the first end of the first cylindrical cavity 3 has a first end cap 5. One end of the cylinder rod 6 of the electric cylinder extends into the first cylindrical cavity 3 through the rod hole of the first end cap 5. Thus, the cylinder rod 6 of the electric cylinder can directly apply thrust to the hydraulic oil in the first cylindrical cavity 3. This tightly integrated structure effectively prevents hydraulic oil leakage. Furthermore, a sealing ring 7 can be provided in the rod hole of the first end cap 5 to more effectively prevent hydraulic oil leakage.

[0035] In other embodiments of this utility model, a piston assembly can also be provided in the first cylindrical cavity 3, and the piston rod of the piston assembly can be connected to the cylinder rod 6 of the electric cylinder, or the cylinder rod 6 of the electric cylinder can be directly used as the piston rod of the piston assembly. In this way, thrust can also be applied to the hydraulic oil in the first cylindrical cavity 3.

[0036] In one embodiment of this utility model, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the hydraulic cylinder component includes a movable rod 8 and a second end cap 9. The second end cap 9 is located at the first end of the second cylindrical cavity 4. One end of the movable rod 8 passes through the rod hole of the second end cap 9 to output linear driving force outward.

[0037] In one embodiment of this utility model, the movable rod 8 is a plunger. The first cylindrical cavity 3 and the second cylindrical cavity 4 can be connected by an oil passage 10 opened inside the integrated block 2, such as... Figure 3 and Figure 5 As shown, oil passage 10 is a single oil passage; therefore, the resulting cylinder can be a single-acting plunger-type telescopic cylinder. For example... Figure 4 and Figure 5 As shown, the oil passage 10 connects the second end of the first cylindrical cavity 3 to the cylindrical wall of the second cylindrical cavity 4. The structure of the two cylindrical cavities inside the integrated block 2 and the oil passage between them is easy to process, for example, it can be made by drilling holes in a steel block according to the dimensions.

[0038] In another embodiment of this utility model, the movable rod 8 may also include a piston and a piston rod, that is, it may also be a piston assembly.

[0039] In one embodiment of this utility model, such as Figure 4 , Figure 5 and Figure 6As shown, the integrated block 2 may also be provided with an exhaust channel 11 and an oil filling channel 12. The first end of the exhaust channel 11 is located on the outer surface of the integrated block 2, and the second end is connected to the second cylindrical cavity 4. The first end of the oil filling channel 12 is located on the outer surface of the integrated block 2, and the second end is connected to the second cylindrical cavity 4. Both the first end of the exhaust channel 11 and the first end of the oil filling channel 12 are provided with plugs 13. The oil filling channel 12 can be used to add hydraulic oil to or drain hydraulic oil from the cavity inside the integrated block 2, while the exhaust channel 11 can be used for venting during oil filling and for air intake during oil draining. To facilitate venting and draining, the second end of the exhaust channel 11 can be connected to the top surface of the second cylindrical cavity 4, and the second end of the oil filling channel 12 can be connected to the bottom surface of the second cylindrical cavity 4. Here, "top" and "bottom" refer to the upper and lower parts in the oil draining / filling state, respectively. When adding / draining oil, the first end of the venting channel 11 faces upward and the first end of the filling channel 12 faces downward. First, open the plug 13 of the venting channel 11, and then open the plug 13 of the filling channel 12. Add / drain oil from the filling channel 12 at the bottom of the integrated block 2. Air inside the integrated block 2 is discharged / entered through the venting channel 11.

[0040] In one embodiment of this invention, the integrated block 2 has multiple surfaces, and the surface where the first end of the first cylindrical cavity 3 is located is neither the same as nor opposite to the surface where the first end of the second cylindrical cavity 4 is located. Therefore, the driving direction of the linear drive system relative to the driving direction of the drive source 1 can be changed, so that the drive source 1 is located on the side of the direction of the driving force on the driven object, thereby significantly reducing the space occupied in the driving direction of the driven object.

[0041] In one embodiment of this utility model, such as Figure 5 As shown, the integrated block 2 may also be provided with mounting holes 14. The mounting holes 14 may be threaded blind holes or threaded countersunk holes, etc. The mounting holes 14 can be used to install and fix the electric cylinder to the integrated block 2, and to install the integrated block 2 on a fixed object at the driven object.

[0042] In one embodiment of this utility model, at one end of the movable rod 8, the shape can be adapted to the driven object or a mounting component, such as a flange, can be provided to fix it to the driven object.

[0043] Finally, it should be noted that the above... Figures 1 to 6 The dimensions and fit relationships of the various components are for illustrative purposes only and should not be interpreted according to the actual dimensional proportions of the components. They should not be regarded as actual product drawings.

[0044] In one specific embodiment of this utility model, the electric cylinder has a stroke of 15mm, a thrust of 15 tons, a driving accuracy of 5μm, a diameter of 30mm for the first cylindrical cavity 3, and a diameter of 80mm for the plunger inside the second cylindrical cavity 4. Therefore, the ratio of the flow area of ​​the first cylindrical cavity 3 to the effective working area of ​​the hydraulic cylinder is 30. 2 :80 2 The ratio is approximately 1:7. In this case, although the electric cylinder's thrust is only 15 tons, the hydraulic cylinder's output driving force can reach 95 tons at this area ratio, and the hydraulic cylinder's driving accuracy can reach below 1μm. The overall driving force and driving accuracy of the linear drive system are greatly improved.

[0045] In the description of this utility model, the terms "first" and "second" 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0050] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0051] It should be understood that the various parts of this utility model can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0052] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0053] Furthermore, the functional units in the various embodiments of this utility model can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A linear drive system, characterized in that, include: The driving source outputs thrust through its output terminal; An integrated block has a first cylindrical cavity and a second cylindrical cavity that are connected to each other. The first end of the first cylindrical cavity is located on the outer surface of the integrated block and the second end is located inside the integrated block. The first end of the second cylindrical cavity is located on the outer surface of the integrated block and the second end is located inside the integrated block. The first end of the first cylindrical cavity is connected to the output end of the drive source. The second cylindrical cavity is provided with a hydraulic cylinder component to form a hydraulic cylinder. The first end of the second cylindrical cavity serves as the output end of the hydraulic cylinder, outputting a linear driving force outward. The flow area of ​​the first cylindrical cavity is smaller than the effective working area of ​​the hydraulic cylinder.

2. The linear drive system according to claim 1, characterized in that, The driving source is an electric cylinder.

3. The linear drive system according to claim 2, characterized in that, After the first cylindrical cavity is connected to the drive source, the first end of the first cylindrical cavity has a first end cap, and one end of the cylinder rod of the electric cylinder extends into the first cylindrical cavity through the rod hole of the first end cap.

4. The linear drive system according to claim 3, characterized in that, A sealing ring is provided inside the rod hole of the first end cap.

5. The linear drive system according to claim 1, characterized in that, The first cylindrical cavity and the second cylindrical cavity are connected by an oil passage opened inside the integrated block.

6. The linear drive system according to claim 1, characterized in that, The hydraulic cylinder component includes a movable rod and a second end cap. The second end cap is disposed at the first end of the second cylindrical cavity. One end of the movable rod passes through the rod hole of the second end cap to output linear driving force outward.

7. The linear drive system according to claim 6, characterized in that, The movable rod is a plunger, or the movable rod includes a piston and a piston rod.

8. The linear drive system according to claim 1, characterized in that, The integrated block is also provided with an exhaust channel and an oil filling channel. The first end of the exhaust channel is located on the outer surface of the integrated block and the second end is connected to the second cylindrical cavity. The first end of the oil filling channel is located on the outer surface of the integrated block and the second end is connected to the second cylindrical cavity. Both the first end of the exhaust channel and the first end of the oil filling channel are provided with plugs.

9. The linear drive system according to claim 8, characterized in that, The second end of the exhaust channel is connected to the top surface of the second cylindrical cavity, and the second end of the refueling channel is connected to the bottom surface of the second cylindrical cavity.

10. The linear drive system according to claim 1, characterized in that, The integrated block has multiple faces, and the face where the first end of the first cylindrical cavity is located is neither the same as nor opposite to the face where the first end of the second cylindrical cavity is located.

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