Oil cylinder structure and hydraulic support

Abstract

The invention provides an oil cylinder structure and a hydraulic support, and relates to the technical field of hydraulic supports. The sealing structure is arranged at one end of the oil cylinder barrel; the piston rod penetrates through the sealing structure and is movably arranged on the oil cylinder barrel; the oil cylinder base is arranged at the other end of the oil cylinder barrel, and a mounting hole is formed in the oil cylinder base and communicated with the oil cylinder barrel; the sealing plug is detachably connected with the mounting hole; the stroke sensor is detachably connected with the sealing plug, and at least one part of the stroke sensor penetrates through the piston rod; the piston rod is provided with a first installation cavity, the stroke sensor comprises a magnetic ring, the radial size of the magnetic ring is smaller than that of the installation hole, and the magnetic ring is used for entering the oil cylinder barrel through the installation hole and located in the first installation cavity. According to the technical scheme, when the stroke sensor, especially a magnetic ring, is installed, the piston rod does not need to be pulled out, the sealing structure does not need to be disassembled either, the sealing performance can be guaranteed, and the disassembly and assembly difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic supports, and in particular, to a cylinder structure and a hydraulic support. Background Art

[0002] In the coal mining industry, fully mechanized mining automation is constantly being popularized. To achieve automated mining, various sensors need to be configured for hydraulic supports. Among them, it is particularly crucial to install a stroke sensor in the push cylinder of the hydraulic support. By detecting the length of the cylinder's telescopic movement through the stroke sensor, the moving distance of the support can be accurately judged, which plays an indispensable role in the precise control of coal mining operations.

[0003] In the related art, during the installation of the magnetic ring of the stroke sensor, since the through-hole in the cylinder base is too small, it is necessary to first remove the end seal assembly of the cylinder body, use a press to pull out the piston rod and the tail seal assembly, and then install the magnetic ring. After installing the magnetic ring, the seal assembly needs to be reset, and the piston rod needs to be pressed into the cylinder by a press. This installation method not only easily causes the seal assembly to shift and be contaminated with dust, affecting the sealing performance, but also requires special equipment for auxiliary disassembly, greatly increasing the installation cost.

[0004] Therefore, how to design a new cylinder structure and optimize the installation method of the stroke sensor is an urgent problem to be solved at present. Summary of the Invention

[0005] To solve or improve at least one of the above technical problems, an object of the present invention is to provide a cylinder structure.

[0006] Another object of the present invention is to provide a hydraulic support having the above cylinder structure.

[0007] To achieve the above object, a first aspect of the present invention provides a cylinder structure, including a cylinder barrel, a sealing structure, a piston rod, a cylinder base, a sealing plug, and a stroke sensor.

[0008] Wherein, the sealing structure is arranged at one end of the cylinder barrel. The piston rod passes through the sealing structure, and the piston rod is movably arranged in the cylinder barrel, and at least a part of the piston rod is arranged inside the cylinder barrel.

[0009] The cylinder base is arranged at the other end of the cylinder barrel. The cylinder base is provided with an installation hole, and the installation hole is communicated with the cylinder barrel.

[0010] The sealing plug is detachably connected to the installation hole. When the sealing plug is in a connected state with the installation hole, at least a part of the sealing plug is arranged inside the installation hole.

[0011] The stroke sensor and the sealing plug are detachably connected. When the stroke sensor and the sealing plug are in a connected state, at least a part of the stroke sensor is disposed through the piston rod.

[0012] One end of the piston rod close to the mounting hole is provided with a first mounting cavity. The stroke sensor includes a magnetic ring, and the radial dimension of the magnetic ring is smaller than the radial dimension of the mounting hole. The magnetic ring is used to enter the cylinder barrel through the mounting hole and is located in the first mounting cavity.

[0013] The present invention aims to provide an oil cylinder structure with an internal stroke sensor. The radial dimension of the magnetic ring of the stroke sensor is smaller than the radial dimension of the mounting hole of the oil cylinder base. Therefore, the magnetic ring can directly enter the cylinder barrel through the mounting hole and is finally arranged inside the first mounting cavity. This design method is beneficial to optimizing the installation method of the stroke sensor. Specifically, when installing the stroke sensor, especially the magnetic ring, it is not necessary to pull out the piston rod, nor is it necessary to remove the sealing structure, which can largely avoid the displacement or dust contamination of the sealing structure and is beneficial to ensuring the sealing performance of the sealing structure. In addition, since no special equipment is required for auxiliary disassembly (no special equipment is required to pull out the piston rod), it is beneficial to improve the disassembly and assembly efficiency, reduce the disassembly and assembly difficulty and the installation cost.

[0014] It should be emphasized that the oil cylinder structure of the present invention optimizes the installation method of the stroke sensor, and users can maintain or replace the stroke sensor without the manufacturer.

[0015] In addition, the above technical solution provided by the present invention may also have the following additional technical features:

[0016] In some technical solutions, optionally, the cavity wall of the first mounting cavity is provided with a first mounting groove. The connecting wall surface between the first mounting groove and the first mounting cavity is a first step surface. The magnetic ring is disposed in the first mounting groove, and one side of the magnetic ring abuts against the first step surface.

[0017] In this technical solution, by providing the first mounting groove, it is convenient to install and position the magnetic ring. The first step surface is used for axially limiting the magnetic ring to ensure that the magnetic ring can move together with the piston rod during the movement of the piston rod relative to the cylinder barrel.

[0018] In some technical solutions, optionally, the cavity wall of the first mounting cavity is further provided with a first placement groove. The first placement groove is disposed on a side of the first mounting groove away from the first step surface. The oil cylinder structure further includes a limit retaining ring. The limit retaining ring is clamped in the first placement groove, and the limit retaining ring is relatively fixed to the piston rod. The limit retaining ring abuts against the magnetic ring.

[0019] In this technical solution, through the mutual cooperation of the limit retaining ring and the first step surface, axial limitation of the magnetic ring can be achieved, so that the magnetic ring is relatively fixed with the piston rod. During the movement of the piston rod relative to the cylinder barrel, the magnetic ring can move together with the piston rod.

[0020] In some technical solutions, optionally, the cylinder base has a second installation cavity, and the second installation cavity communicates with the installation hole. The cylinder structure further includes a dust cover. The dust cover is detachably connected to the cylinder base. When the dust cover and the cylinder base are in a connected state, the dust cover is used to block the second installation cavity.

[0021] In this technical solution, the dust cover mainly plays a role in dust prevention. By simply disassembling the dust cover, the travel sensor and its magnetic ring can be installed, avoiding damage to the sealing structure, and users can also install and maintain the travel sensor on site.

[0022] In some technical solutions, optionally, the travel sensor further includes an electronic compartment and a measuring rod. At least a part of the electronic compartment is arranged in the sealing plug, and the electronic compartment is detachably connected to the sealing plug. One end of the measuring rod is connected to the electronic compartment, and at least a part of the measuring rod is arranged in the first installation cavity. The magnetic ring is movably arranged on the measuring rod.

[0023] In this technical solution, by optimizing the installation method of the travel sensor, the magnetic ring can directly enter the cylinder barrel through the installation hole and enter the first installation groove through the first installation cavity. This installation method does not require pulling out the piston rod, nor does it require removing the sealing structure, which is beneficial to ensuring the sealing performance and reducing the disassembly and assembly difficulty.

[0024] In some technical solutions, optionally, when the electronic compartment and the sealing plug are in a connected state, the electronic compartment and the sealing plug are in a sealed connection.

[0025] In this technical solution, this design method can ensure the sealing performance between the electronic compartment and the sealing plug.

[0026] In some technical solutions, optionally, the travel sensor further includes a data acquisition unit. The data acquisition unit is arranged on the cylinder base, and the data acquisition unit is electrically connected to the measuring rod.

[0027] In this technical solution, the data acquisition unit of the travel sensor is connected to the controller, used to collect the telescopic distance of the piston rod, and determine the moving distance of the hydraulic support according to the telescopic distance of the piston rod.

[0028] In some technical solutions, optionally, a second placement groove is provided on the travel sensor. The cylinder structure further includes a first sealing member. At least a part of the first sealing member is arranged in the second placement groove.

[0029] In this technical solution, after being extruded, the first seal deforms, and the first seal can fill the gap between the outer wall of the electronic compartment and the sealing plug, thereby improving the sealing performance.

[0030] In some technical solutions, optionally, a third placement groove is provided on the outer wall of the sealing plug. The oil cylinder structure further includes a second seal. At least a part of the second seal is disposed in the third placement groove.

[0031] In this technical solution, after being extruded, the second seal deforms, and the second seal can fill the gap between the outer wall of the second part and the inner wall of the second hole section, thereby improving the sealing performance.

[0032] The second aspect of the present invention provides a hydraulic support, including a support base and the oil cylinder structure in any of the above technical solutions. The oil cylinder structure is connected to the support base.

[0033] Optionally, the oil cylinder structure is a push - pull oil cylinder. One end of the push - pull oil cylinder is connected to the support base, and the other end of the push - pull oil cylinder is connected to the scraper conveyor through a push - pull rod. By the telescopic movement of the push - pull oil cylinder, the scraper conveyor and the hydraulic support move alternately.

[0034] Since the hydraulic support includes any of the oil cylinder structures in the first aspect above, it has the beneficial effects of any of the above technical solutions, which will not be elaborated here.

[0035] The additional aspects and advantages of the technical solutions of the present invention will become apparent in the following description section or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Shows a schematic structural diagram of an oil cylinder structure according to an embodiment of the present invention;

[0037] Figure 2 Shows a cross - sectional view of an oil cylinder structure according to an embodiment of the present invention;

[0038] Figure 3 Shows Figure 2 A partial enlarged schematic view of part A in

[0039] Figure 4 Shows Figure 2 A partial enlarged schematic view of part B in

[0040] Figure 5 Shows a schematic diagram of a stroke sensor according to an embodiment of the present invention;

[0041] Figure 6 Shows a schematic diagram of a sealing plug according to an embodiment of the present invention;

[0042] Figure 7Shows a schematic diagram of a dust cover according to an embodiment of the present invention;

[0043] Figure 8 Shows a structural block diagram of a hydraulic support according to an embodiment of the present invention.

[0044] Wherein, Figures 1 to 8 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0045] 100: Cylinder structure; 110: Cylinder barrel; 111: Cavity; 1111: First cavity section; 1112: Second cavity section; 1113: Second step surface; 120: Sealing structure; 121: First structure section; 122: Second structure section; 123: Third structure section; 124: Third step surface; 125: Fourth step surface; 126: Fourth placement groove; 127: Fifth placement groove; 130: Piston rod; 131: First installation cavity; 132: First installation groove; 133: First placement groove; 134: First step surface; 140: Cylinder base; 141: Installation hole; 1411: First hole section; 1412: Second hole section; 1413: Third hole section; 1414: Fifth step surface; 1415: Sixth step surface; 142: Second installation cavity; 1421: Third cavity section; 1422: Fourth cavity section; 1423: Eighth step surface; 150: Sealing plug; 151: First part; 152: Second part; 153: Seventh step surface; 154: Third placement groove; 160: Stroke sensor; 161: Magnetic ring; 162: Electronic bin; 1621: Second placement groove; 163: Measuring rod; 164: Data acquisition part; 170: Dust cover; 171: Third part; 172: Fourth part; 173: Ninth step surface; 174: Sixth placement groove; 181: Limit retaining ring; 182: First seal; 183: Second seal; 184: Third seal; 185: Fourth seal; 186: Fifth seal; 200: Hydraulic support; 210: Support base; a: First direction; b: Radial direction. Detailed implementation manners

[0046] In order to be able to more clearly understand the above-mentioned objects, features, and advantages of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0047] In the following description, many specific details are set forth in order to fully understand the present invention. However, the embodiments of the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the limitations of the specific embodiments disclosed below.

[0048] Next, refer to Figures 1 to 8Describe the cylinder structure 100 and the hydraulic support 200 provided according to some embodiments of the present invention.

[0049] In one embodiment of the present invention, as Figure 1 and Figure 2 shown, the cylinder structure 100 includes a cylinder barrel 110, a sealing structure 120, a piston rod 130, a cylinder base 140, a sealing plug 150, and a stroke sensor 160.

[0050] The sealing structure 120 is provided at one end of the cylinder barrel 110. The sealing structure 120 is relatively fixed to the cylinder barrel 110, and the connection between the sealing structure 120 and the cylinder barrel 110 is a sealed connection.

[0051] The cylinder base 140 is provided at the other end of the cylinder barrel 110. The cylinder base 140 is used to block the other end of the cylinder barrel 110. The cylinder base 140 is relatively fixed to the cylinder barrel 110, and the connection between the cylinder base 140 and the cylinder barrel 110 is a sealed connection.

[0052] Optionally, as Figure 2 shown, the cylinder barrel 110 has a cavity 111. The cylinder barrel 110 has a first end and a second end disposed opposite to each other along the first direction a. Among them, the sealing structure 120 is provided at the first end of the cylinder barrel 110; the cylinder base 140 is provided at the second end of the cylinder barrel 110.

[0053] Optionally, as Figure 4 shown, at least a part of the sealing structure 120 is disposed in the cavity 111. The cavity 111 includes a first cavity section 1111 and a second cavity section 1112. The first cavity section 1111 and the second cavity section 1112 are connected, and the first cavity section 1111 and the second cavity section 1112 are arranged in sequence from the first end to the second end. The cavity 111 is cylindrical. The radial dimension of the first cavity section 1111 is smaller than the radial dimension of the second cavity section 1112. The first cavity section 1111 and the second cavity section 1112 form a second stepped structure, and the connecting wall surface between the first cavity section 1111 and the second cavity section 1112 is a second stepped surface 1113.

[0054] Optionally, as Figure 4As shown, the sealing structure 120 includes a connected first structural segment 121, a second structural segment 122, and a third structural segment 123. The second structural segment 122 is disposed between the first structural segment 121 and the third structural segment 123. The first structural segment 121, the second structural segment 122, and the third structural segment 123 are all cylinders. The radial dimension of the first structural segment 121 is smaller than that of the second structural segment 122; the radial dimension of the second structural segment 122 is smaller than that of the third structural segment 123. The first structural segment 121 and the second structural segment 122 form a third stepped structure, and the connecting wall surface between the first structural segment 121 and the second structural segment 122 is the third stepped surface 124. The second structural segment 122 and the third structural segment 123 form a fourth stepped structure, and the connecting wall surface between the second structural segment 122 and the third structural segment 123 is the fourth stepped surface 125.

[0055] The first structural segment 121 is disposed within the first cavity segment 1111, and the outer wall of the first structural segment 121 abuts against the cavity wall of the first cavity segment 1111. The second structural segment 122 is disposed within the second cavity segment 1112, and the outer wall of the second structural segment 122 abuts against the cavity wall of the second cavity segment 1112. The third stepped surface 124 abuts against the second stepped surface 1113. The third structural segment 123 is disposed outside the cavity 111, and the fourth stepped surface 125 abuts against the end surface of the first end of the cylinder barrel 110.

[0056] By mating the stepped structure of the cylinder barrel 110 with the stepped structure of the sealing structure 120, the third stepped surface 124 abuts against the second stepped surface 1113, and the fourth stepped surface 125 abuts against the end surface of the first end. This design method is beneficial to improving the assembly accuracy of the sealing structure 120, thereby ensuring the sealing performance.

[0057] The piston rod 130 passes through the sealing structure 120. The piston rod 130 is movably disposed within the cylinder barrel 110, and the piston rod 130 can move relative to the cylinder barrel 110. The sealing structure 120 can play a guiding role to a certain extent, ensuring the smoothness of the telescopic process of the piston rod 130.

[0058] Optionally, as Figure 4 shown, a fourth placement groove 126 is provided on the outer wall of the first structural segment 121. The oil cylinder structure 100 further includes a third seal 184. At least a part of the third seal 184 is disposed within the fourth placement groove 126. The third seal 184 abuts against the groove wall of the fourth placement groove 126, and the third seal 184 abuts against the cavity wall of the first cavity segment 1111. After being compressed, the third seal 184 deforms, and the third seal 184 can fill the gap between the outer wall of the first structural segment 121 and the cavity wall of the first cavity segment 1111, thereby improving the sealing performance.

[0059] It should be noted that the number of the fourth placement grooves 126 is at least one, that is, the fourth placement grooves 126 can be one, two or more. The number of the third seals 184 is at least one, that is, the third seals 184 can be one, two or more. The fourth placement grooves 126 and the third seals 184 are flexibly arranged according to actual requirements.

[0060] Optionally, the number of the third seals 184 is the same as that of the fourth placement grooves 126. The third seals 184 are sealing rings.

[0061] Optionally, as Figure 4 shown, a fifth placement groove 127 is provided on the outer wall of the second structural segment 122. The oil cylinder structure 100 further includes a fourth seal 185. At least a part of the fourth seal 185 is arranged in the fifth placement groove 127. The fourth seal 185 abuts against the groove wall of the fifth placement groove 127 and abuts against the cavity wall of the second cavity segment 1112. After being squeezed, the fourth seal 185 deforms, and the fourth seal 185 can fill the gap between the outer wall of the second structural segment 122 and the cavity wall of the second cavity segment 1112, thereby improving the sealing performance.

[0062] It should be noted that the number of the fifth placement grooves 127 is at least one, that is, the fifth placement grooves 127 can be one, two or more. The number of the fourth seals 185 is at least one, that is, the fourth seals 185 can be one, two or more. The fifth placement grooves 127 and the fourth seals 185 are flexibly arranged according to actual requirements.

[0063] Optionally, the number of the fourth seals 185 is the same as that of the fifth placement grooves 127. The fourth seals 185 are sealing rings.

[0064] The piston rod 130 penetrates through the sealing structure 120. The piston rod 130 is movably arranged in the oil cylinder barrel 110, and at least a part of the piston rod 130 is arranged inside the oil cylinder barrel 110. Optionally, the piston rod 130 includes a push rod and a piston, and the piston is arranged at one end of the push rod. The piston is arranged inside the oil cylinder barrel 110, and at least a part of the push rod is arranged inside the oil cylinder barrel 110. The piston divides the interior of the oil cylinder barrel 110 into a rod chamber and a rodless chamber.

[0065] Optionally, the oil cylinder base 140 is arranged at the second end of the oil cylinder barrel 110, and at least a part of the oil cylinder base 140 is arranged inside the oil cylinder barrel 110. The oil cylinder base 140 and the oil cylinder barrel 110 are relatively fixed by welding.

[0066] As Figure 2 and Figure 3As shown, the oil cylinder base 140 is provided with a mounting hole 141, and the mounting hole 141 communicates with the oil cylinder barrel 110. It can be understood that the mounting hole 141 communicates with the cavity 111.

[0067] The sealing plug 150 is detachably connected to the mounting hole 141. When the sealing plug 150 is in a connected state with the mounting hole 141, at least a part of the sealing plug 150 is disposed within the mounting hole 141. When the sealing plug 150 is in a connected state with the mounting hole 141, the sealing plug 150 and the mounting hole 141 are in a sealed connection.

[0068] It should be emphasized that the sealing plug 150 is detachably connected to the mounting hole 141, which facilitates the staff to disassemble and assemble the sealing plug 150 and related components, and is conducive to maintenance or replacement.

[0069] Optionally, as Figure 3 shown, the mounting hole 141 includes a connected first hole section 1411, a second hole section 1412, and a third hole section 1413. The second hole section 1412 is disposed between the first hole section 1411 and the third hole section 1413. The first hole section 1411, the second hole section 1412, and the third hole section 1413 are arranged in sequence from the end of the mounting hole 141 away from the oil cylinder barrel 110 towards the end close to the oil cylinder barrel 110. The aperture of the first hole section 1411 is larger than the aperture of the second hole section 1412, and the aperture of the second hole section 1412 is larger than the aperture of the third hole section 1413. The first hole section 1411 and the second hole section 1412 form a fifth step structure, and the connecting wall surface between the first hole section 1411 and the second hole section 1412 is the fifth step surface 1414. The second hole section 1412 and the third hole section 1413 form a sixth step structure, and the connecting wall surface between the second hole section 1412 and the third hole section 1413 is the sixth step surface 1415.

[0070] Optionally, as Figure 3 and Figure 6 shown, the sealing plug 150 includes a connected first part 151 and a second part 152. Both the first part 151 and the second part 152 are cylinders. The radial dimension of the first part 151 is larger than the radial dimension of the second part 152. The first part 151 and the second part 152 form a seventh step surface 153, and the connecting wall surface between the first part 151 and the second part 152 is the seventh step surface 153. The first part 151 is disposed within the first hole section 1411, and the outer wall of the first part 151 abuts against the inner wall of the first aperture. The seventh step surface 153 abuts against the fifth step surface 1414. The second part 152 is disposed within the second hole section 1412, and the outer wall of the second part 152 abuts against the inner wall of the second hole section 1412. The side of the second part 152 facing away from the first part 151 abuts against the sixth step surface 1415.

[0071] When the sealing plug 150 is in a connected state with the mounting hole 141, the stepped structure of the sealing plug 150 cooperates with the stepped structure of the mounting hole 141. The seventh stepped surface 153 abuts against the fifth stepped surface 1414, and the side of the second part 152 facing away from the first part 151 abuts against the sixth stepped surface 1415. This design method is beneficial to improving the assembly accuracy of the sealing plug 150, thereby ensuring the sealing performance.

[0072] Optionally, the connection between the sealing plug 150 and the mounting hole 141 is a threaded connection. Alternatively, the sealing plug 150 and the mounting hole 141 are relatively fixed through a flange structure.

[0073] Optionally, the first part 151 of the sealing plug 150 and the first hole section 1411 of the mounting hole 141 are in threaded connection; and / or the second part 152 of the sealing plug 150 and the second hole section 1412 of the mounting hole 141 are in threaded connection.

[0074] When the first part 151 and the first hole section 1411 are in threaded connection, the outer wall of the first part 151 is provided with an external thread, and the inner wall of the first hole section 1411 is provided with an internal thread. By setting the first part 151 and the first hole section 1411 as a threaded connection, it is convenient for the staff to disassemble and assemble the sealing plug 150, which is beneficial to maintenance or replacement.

[0075] When the second part 152 and the second hole section 1412 are in threaded connection, the outer wall of the second part 152 is provided with an external thread, and the inner wall of the second hole section 1412 is provided with an internal thread. By setting the second part 152 and the second hole section 1412 as a threaded connection, it is convenient for the staff to disassemble and assemble the sealing plug 150, which is beneficial to maintenance or replacement.

[0076] The travel sensor 160 is detachably connected to the sealing plug 150. When the travel sensor 160 is in a connected state with the sealing plug 150, at least a part of the travel sensor 160 penetrates through the piston rod 130. When the travel sensor 160 is in a connected state with the sealing plug 150, the travel sensor 160 and the sealing plug 150 are in a sealed connection.

[0077] It should be emphasized that the travel sensor 160 is detachably connected to the sealing plug 150, which is convenient for the staff to disassemble and assemble the travel sensor 160, and is beneficial to maintenance or replacement.

[0078] One end of the piston rod 130 close to the mounting hole 141 is provided with a first mounting cavity 131. The travel sensor 160 includes a magnetic ring 161, and the radial dimension of the magnetic ring 161 is smaller than the radial dimension of the mounting hole 141. The magnetic ring 161 is used to enter the cylinder barrel 110 through the mounting hole 141 and be located in the first mounting cavity 131.

[0079] Optionally, the aperture of the third hole section 1413 is larger than the radial dimension of the magnetic ring 161. Since the aperture of the first hole section 1411 is larger than that of the second hole section 1412, and the aperture of the second hole section 1412 is larger than that of the third hole section 1413, the apertures of the first hole section 1411, the second hole section 1412, and the third hole section 1413 are all larger than the radial dimension of the magnetic ring 161. In this design, it can be ensured that the magnetic ring 161 can directly enter the oil cylinder barrel 110 through the mounting hole 141 and is finally arranged inside the first mounting cavity 131.

[0080] Optionally, when the travel sensor 160 and the sealing plug 150 are in a connected state, at least a part of the measuring rod 163 of the travel sensor 160 is arranged inside the first mounting cavity 131 of the piston rod 130. The magnetic ring 161 is sleeved on the measuring rod 163, and the magnetic ring 161 can move relative to the measuring rod 163. The magnetic ring 161 is relatively fixed to the piston rod 130, and during the movement of the piston rod 130 relative to the oil cylinder barrel 110, the magnetic ring 161 can move together with the piston rod 130.

[0081] The working principle of the travel sensor 160 is as follows: when the piston rod 130 expands and contracts, it drives the magnetic ring 161 to move on the measuring rod 163 of the travel sensor 160 and is converted into an electrical signal. It is connected to the controller through the data acquisition socket (data acquisition part 164) of the travel sensor 160 to collect the expansion and contraction distance of the piston rod 130 and determine the movement distance of the hydraulic support 200 according to the expansion and contraction distance of the piston rod 130.

[0082] Optionally, the magnetic ring 161 and the first mounting cavity 131 of the piston rod 130 are in a threaded connection. Through the threaded connection, axial limitation is performed on the installed magnetic ring 161 so that the magnetic ring 161 can move together with the piston rod 130.

[0083] Optionally, the magnetic ring 161 is axially limited by a limit retaining ring 181 so that the magnetic ring 161 can move together with the piston rod 130. The limit retaining ring 181 is used for snap connection with the first mounting cavity 131.

[0084] Optionally, the magnetic ring 161 is axially limited by a threaded plug so that the magnetic ring 161 can move together with the piston rod 130. The threaded plug is used for threaded connection with the first mounting cavity 131. When the threaded plug is in a connected state with the first mounting cavity 131, the threaded plug can abut against the magnetic ring 161.

[0085] The present invention aims to provide an oil cylinder structure 100 with an in-built stroke sensor 160. The radial dimension of the magnetic ring 161 of the stroke sensor 160 is smaller than the radial dimension of the mounting hole 141 of the oil cylinder base 140. Therefore, the magnetic ring 161 can directly enter the oil cylinder barrel 110 through the mounting hole 141 and is finally arranged inside the first mounting cavity 131. This design method is beneficial to optimizing the installation method of the stroke sensor 160. Specifically, when installing the stroke sensor 160, especially the magnetic ring 161, it is not necessary to pull out the piston rod 130, nor to remove the sealing structure 120, which can largely avoid the displacement or dust contamination of the sealing structure 120 and is beneficial to ensuring the sealing performance of the sealing structure 120. In addition, since no special equipment is required for auxiliary disassembly (no special equipment is needed to pull out the piston rod 130), it is beneficial to improve the disassembly and assembly efficiency, reduce the disassembly and assembly difficulty and the installation cost.

[0086] It should be emphasized that the oil cylinder structure 100 of the present invention optimizes the installation method of the stroke sensor 160, and users can maintain or replace the stroke sensor 160 without the need of the manufacturer.

[0087] The "radial direction" mentioned in the present invention is Figure 2 and Figure 3 the direction shown by "b" in. The "radial dimension" is the dimension in the direction shown by "b".

[0088] In some embodiments, optionally, as Figure 3 shown, the cavity wall of the first mounting cavity 131 is provided with a first mounting groove 132. The first mounting groove 132 and the first mounting cavity 131 form a first stepped structure. The connecting wall surface between the first mounting groove 132 and the first mounting cavity 131 is a first stepped surface 134. The magnetic ring 161 is arranged in the first mounting groove 132, and one side of the magnetic ring 161 abuts against the first stepped surface 134.

[0089] Optionally, the first mounting cavity 131 is cylindrical, and the first mounting groove 132 is cylindrical. The radial dimension of the first mounting groove 132 is larger than the radial dimension of the first mounting cavity 131.

[0090] By providing the first mounting groove 132, it is convenient to install and position the magnetic ring 161. The first stepped surface 134 is used for axially limiting the magnetic ring 161 to ensure that the magnetic ring 161 can move together with the piston rod 130 during the movement of the piston rod 130 relative to the oil cylinder barrel 110.

[0091] It should be noted that by optimizing the installation method of the stroke sensor 160, the magnetic ring 161 can directly enter the cylinder barrel 110 through the mounting hole 141 and enter the first mounting groove 132 through the first mounting cavity 131. This installation method does not require pulling out the piston rod 130 or removing the sealing structure 120, which is beneficial to ensuring the sealing performance and reducing the disassembly and assembly difficulty.

[0092] In some embodiments, optionally, as Figure 3 shown, a first placement groove 133 is further provided on the cavity wall of the first mounting cavity 131. The first placement groove 133 is provided on the side of the first mounting groove 132 away from the first step surface 134.

[0093] The cylinder structure 100 further includes a limit retaining ring 181. The limit retaining ring 181 is clamped in the first placement groove 133, and the limit retaining ring 181 is relatively fixed to the piston rod 130. The limit retaining ring 181 abuts against the magnetic ring 161. It can be understood that the connection method between the limit retaining ring 181 and the first placement groove 133 is a snap connection.

[0094] Through the mutual cooperation of the limit retaining ring 181 and the first step surface 134, axial limitation of the magnetic ring 161 can be achieved, so that the magnetic ring 161 is relatively fixed to the piston rod 130. During the movement of the piston rod 130 relative to the cylinder barrel 110, the magnetic ring 161 can move together with the piston rod 130.

[0095] Optionally, the measuring rod 163 of the stroke sensor 160 passes through the limit retaining ring 181. The measuring rod 163 can move relative to the limit retaining ring 181.

[0096] Optionally, the limit retaining ring 181 is an orifice snap ring.

[0097] It should be noted that in the related art, after the magnetic ring 161 is installed in place, it is limited by a plug, which has a high cost. In the technical solution of the present invention, axial limitation of the magnetic ring 161 by the limit retaining ring 181 is beneficial to reducing the installation cost.

[0098] In some embodiments, optionally, as Figure 2 and Figure 3 shown, the cylinder base 140 has a second mounting cavity 142, and the second mounting cavity 142 communicates with the mounting hole 141. In the case where the sealing plug 150 is not installed, the second mounting cavity 142 communicates with the cavity 111 of the cylinder barrel 110 through the mounting hole 141. When the sealing plug 150 is in a connected state with the mounting hole 141, the second mounting cavity 142 does not communicate with the cavity 111 of the cylinder barrel 110.

[0099] As Figure 2 and Figure 3As shown, the oil cylinder structure 100 further includes a dust cover 170. The dust cover 170 is detachably connected to the oil cylinder base 140. When the dust cover 170 is in a connected state with the oil cylinder base 140, the dust cover 170 is used to block the second installation cavity 142.

[0100] The dust cover 170 mainly functions to prevent dust. By simply disassembling the dust cover 170, the stroke sensor 160 and its magnetic ring 161 can be installed, avoiding damage to the sealing structure 120, and users can also install and maintain the stroke sensor 160 on-site.

[0101] Optionally, the dust cover 170 is threadedly connected to the oil cylinder base 140, which facilitates the disassembly and assembly of the dust cover 170 by the staff and is beneficial for maintenance or replacement.

[0102] Optionally, as Figure 3 shown, the second installation cavity 142 includes a connected third cavity section 1421 and a fourth cavity section 1422. The third cavity section 1421 and the fourth cavity section 1422 are arranged in sequence from the end of the second installation cavity 142 far from the oil cylinder barrel 110 to the end close to the oil cylinder barrel 110. The second installation cavity 142 is cylindrical. The radial dimension of the third cavity section 1421 is larger than that of the fourth cavity section 1422. The third cavity section 1421 and the fourth cavity section 1422 form an eighth stepped structure, and the connecting wall surface between the third cavity section 1421 and the fourth cavity section 1422 is an eighth stepped surface 1423.

[0103] Optionally, as Figure 3 and Figure 7 shown, the dust cover 170 includes a connected third part 171 and a fourth part 172. The third part 171 is a cylinder, and the fourth part 172 is a cylinder. The radial dimension of the third part 171 is larger than that of the fourth part 172. The third part 171 and the fourth part 172 form a ninth stepped structure, and the connecting wall surface between the third part 171 and the fourth part 172 is a ninth stepped surface 173. The third part 171 is arranged in the third cavity section 1421, and the outer wall of the third part 171 abuts against the cavity wall of the third cavity section 1421. The ninth stepped surface 173 abuts against the eighth stepped surface 1423. The fourth part 172 is arranged in the fourth cavity section 1422, and the outer wall of the fourth part 172 abuts against the cavity wall of the fourth cavity section 1422.

[0104] When the dust cover 170 is in a connected state with the second installation cavity 142, the stepped structure of the dust cover 170 cooperates with the stepped structure of the second installation cavity 142, and the ninth stepped surface 173 abuts against the eighth stepped surface 1423. This design method is beneficial to improving the assembly accuracy of the dust cover 170, thereby ensuring the sealing performance.

[0105] Optionally, a sixth placement groove 174 is provided on the outer wall of the third part 171. The oil cylinder structure 100 further includes a fifth seal 186. At least a part of the fifth seal 186 is disposed in the sixth placement groove 174. The fifth seal 186 abuts against the groove wall of the sixth placement groove 174 and abuts against the cavity wall of the third cavity section 1421.

[0106] After being squeezed, the fifth seal 186 deforms, and the fifth seal 186 can fill the gap between the outer wall of the third part 171 and the cavity wall of the third cavity section 1421, thereby improving the sealing performance.

[0107] It should be noted that the number of the sixth placement grooves 174 is at least one, that is, the sixth placement groove 174 can be one, two or more. The number of the fifth seals 186 is at least one, that is, the fifth seals 186 can be one, two or more. The sixth placement groove 174 and the fifth seals 186 are flexibly arranged according to actual needs.

[0108] In some embodiments, optionally, as Figure 2 and Figure 3 shown, the stroke sensor 160 further includes an electronic compartment 162 and a measuring rod 163. At least a part of the electronic compartment 162 is disposed in the sealing plug 150, and the electronic compartment 162 is detachably connected to the sealing plug 150.

[0109] Optionally, the electronic compartment 162 is snap-connected or thread-connected to the sealing plug 150.

[0110] One end of the measuring rod 163 is connected to the electronic compartment 162, and at least a part of the measuring rod 163 is disposed in the first installation cavity 131. The magnetic ring 161 is movably disposed on the measuring rod 163.

[0111] By optimizing the installation method of the stroke sensor 160, the magnetic ring 161 can directly enter the oil cylinder barrel 110 through the installation hole 141 and enter the first installation groove 132 through the first installation cavity 131. This installation method does not require pulling out the piston rod 130, nor does it require removing the sealing structure 120, which is beneficial to ensuring the sealing performance and reducing the disassembly and assembly difficulty.

[0112] In some embodiments, optionally, when the electronic compartment 162 and the sealing plug 150 are in a connected state, the electronic compartment 162 and the sealing plug 150 are hermetically connected.

[0113] This design method can ensure the sealing performance between the electronic compartment 162 and the sealing plug 150.

[0114] In some embodiments, optionally, as Figure 2As shown, the stroke sensor 160 further includes a data acquisition unit 164. The data acquisition unit 164 is provided on the oil cylinder base 140, and the data acquisition unit 164 is electrically connected to the measuring rod 163.

[0115] Connected to the controller through the data acquisition unit 164 of the stroke sensor 160, it is used to collect the telescopic distance of the piston rod 130 and determine the moving distance of the hydraulic support 200 according to the telescopic distance of the piston rod 130.

[0116] In some embodiments, optionally, as Figure 5 As shown, a second placement groove 1621 is provided on the stroke sensor 160. The oil cylinder structure 100 further includes a first seal 182. At least a part of the first seal 182 is provided in the second placement groove 1621.

[0117] Optionally, the second placement groove 1621 is provided on the outer wall of the electronic bin 162 of the stroke sensor 160. The first seal 182 abuts against the groove wall of the second placement groove 1621, and the first seal 182 abuts against the sealing plug 150.

[0118] After being squeezed, the first seal 182 deforms, and the first seal 182 can fill the gap between the outer wall of the electronic bin 162 and the sealing plug 150, thereby improving the sealing performance.

[0119] It should be noted that the number of the second placement grooves 1621 is at least one, that is, the second placement grooves 1621 can be one, two or more. The number of the first seals 182 is at least one, that is, the first seals 182 can be one, two or more. The second placement grooves 1621 and the first seals 182 are flexibly set according to actual needs.

[0120] In some embodiments, optionally, a third placement groove 154 is provided on the outer wall of the sealing plug 150. The oil cylinder structure 100 further includes a second seal 183. At least a part of the second seal 183 is provided in the third placement groove 154.

[0121] Optionally, as Figure 6 As shown, the third placement groove 154 is provided on the outer wall of the second part 152. The second seal 183 abuts against the groove wall of the third placement groove 154, and the second seal 183 abuts against the inner wall of the second hole section 1412. After being squeezed, the second seal 183 deforms, and the second seal 183 can fill the gap between the outer wall of the second part 152 and the inner wall of the second hole section 1412, thereby improving the sealing performance.

[0122] It should be noted that the number of the third placement grooves 154 is at least one, that is, the third placement grooves 154 can be one, two or more. The number of the second seals 183 is at least one, that is, the second seals 183 can be one, two or more. The third placement grooves 154 and the second seals 183 are flexibly arranged according to actual requirements.

[0123] In some embodiments, optionally, when installing the stroke sensor 160, the disassembly and assembly sequence of the components in the oil cylinder structure 100 is as follows: remove the dust cover 170 in the oil cylinder base 140; pass the magnetic ring 161 into the oil cylinder barrel 110 through the mounting hole 141 and enter the first mounting groove 132 through the first mounting cavity 131; insert the measuring rod 163 of the stroke sensor 160 into the mounting position (the first mounting cavity 131 of the piston rod 130); install the dust cover 170.

[0124] It should be noted that the present invention provides a new oil cylinder structure 100. When installing the stroke sensor 160, it is not necessary to disassemble the sealing structure 120 related to the piston rod 130, which is beneficial to protecting the sealing performance of the sealing structure 120. Even non-professional manufacturers can independently complete the maintenance of the stroke sensor 160.

[0125] In the related art, after the magnetic ring 161 is installed in place, it is limited by a plug, with high cost. In the technical solution of the present invention, the magnetic ring 161 is axially limited by a limit retaining ring 181, which is beneficial to reducing the installation cost.

[0126] In an embodiment according to the present invention, as Figure 8 shown, the hydraulic support 200 includes a support base 210 and the oil cylinder structure 100 in any of the above technical solutions. The oil cylinder structure 100 is connected to the support base 210.

[0127] Optionally, the oil cylinder structure 100 is a push-leg cylinder. One end of the push-leg cylinder is connected to the support base 210, and the other end of the push-leg cylinder is connected to the scraper conveyor through a push-pull rod. By the telescoping of the push-leg cylinder, the scraper conveyor and the hydraulic support 200 move alternately.

[0128] Since the hydraulic support 200 includes the oil cylinder structure 100 in any of the above first aspects, it has the beneficial effects of any of the above embodiments, which will not be elaborated here.

[0129] In the present invention, the terms "first", "second", and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance; the term "plural" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0130] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0131] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0132] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cylinder structure, characterized in that: include: Oil cylinder barrel (110); A sealing structure (120) is provided at one end of the oil cylinder body (110); A piston rod (130) is inserted into the sealing structure (120), the piston rod (130) is movably disposed on the oil cylinder body (110), and at least a portion of the piston rod (130) is disposed in the oil cylinder body (110); A cylinder base (140) is arranged at the other end of the cylinder barrel (110), and the cylinder base (140) is provided with a mounting hole (141), and the mounting hole (141) is communicated with the cylinder barrel (110); a sealing plug (150) detachably connected to the mounting hole (141); when the sealing plug (150) and the mounting hole (141) are in a connected state, at least a portion of the sealing plug (150) is disposed in the mounting hole (141); a stroke sensor (160) detachably connected to the sealing plug (150); when the stroke sensor (160) and the sealing plug (150) are in a connected state, at least a portion of the stroke sensor (160) is disposed through the piston rod (130); A first mounting cavity (131) is provided at one end of the piston rod (130) close to the mounting hole (141); the travel sensor (160) comprises a magnetic ring (161); the radial dimension of the magnetic ring (161) is smaller than the radial dimension of the mounting hole (141); the magnetic ring (161) is used to enter the cylinder body (110) through the mounting hole (141) and be located in the first mounting cavity (131).

2. The oil cylinder structure according to claim 1, characterized in that: A first installation groove (132) is provided on the cavity wall of the first installation cavity (131), and a connecting wall surface between the first installation groove (132) and the first installation cavity (131) is a first step surface (134); The magnetic ring (161) is arranged in the first installation groove (132), and one side of the magnetic ring (161) abuts against the first step surface (134).

3. The oil cylinder structure according to claim 2, characterized in that: The cavity wall of the first installation cavity (131) is further provided with a first placement groove (133), and the first placement groove (133) is provided on a side of the first installation groove (132) away from the first step surface (134); The oil cylinder structure also includes: A limit stop ring (181) is clamped in the first placement groove (133), the limit stop ring (181) and the piston rod (130) are relatively fixed, and the limit stop ring (181) and the magnetic ring (161) are against each other.

4. The oil cylinder structure according to any one of claims 1 to 3, characterized in that: The oil cylinder base (140) has a second installation cavity (142), and the second installation cavity (142) is communicated with the installation hole (141); The oil cylinder structure also includes: The dust cover (170) is detachably connected to the oil cylinder base (140); when the dust cover (170) and the oil cylinder base (140) are in a connected state, the dust cover (170) is used to block the second installation cavity (142).

5. The oil cylinder structure according to any one of claims 1 to 3, characterized in that: The travel sensor (160) further includes: An electronic compartment (162), at least a portion of which is disposed in the sealing plug (150), and the electronic compartment (162) and the sealing plug (150) are detachably connected; a measuring rod (163), one end of the measuring rod (163) being connected to the electronic compartment (162), and at least a portion of the measuring rod (163) being disposed in the first installation cavity (131); The magnetic ring (161) is movably arranged on the measuring rod (163).

6. The oil cylinder structure according to claim 5, characterized in that: When the electronic compartment (162) and the sealing plug (150) are in a connected state, the electronic compartment (162) and the sealing plug (150) are sealedly connected.

7. The oil cylinder structure according to claim 5, characterized in that: The travel sensor (160) further includes: A data acquisition unit (164) is disposed on the oil cylinder base (140), and the data acquisition unit (164) is electrically connected to the measuring rod (163).

8. The oil cylinder structure according to any one of claims 1 to 3, characterized in that: The travel sensor (160) is provided with a second placement groove (1621); The oil cylinder structure also includes: A first sealing member (182), at least a portion of the first sealing member (182) is disposed in the second placement groove (1621).

9. The oil cylinder structure according to any one of claims 1 to 3, characterized in that: The outer wall of the sealing plug (150) is provided with a third placement groove (154); The oil cylinder structure also includes: A second sealing member (183), at least a portion of which is disposed in the third placement groove (154).

10. A hydraulic support, characterized in that: include: A support base (210); The oil cylinder structure according to any one of claims 1 to 9, connected to the support base (210).

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