Hydraulic expansion guide rail clamp and using method thereof

Abstract

The hydraulic expansion guide rail clamping device comprises a guide rail body, guide rail side grooves and a moving block, the guide rail side grooves are formed in the two sides of the guide rail body, the moving block is connected to the guide rail body in a sliding mode, an elastic plate is arranged in the moving block, a locking block is installed on the elastic plate, a cavity is further formed in the moving block, and the elastic plate is arranged in the cavity. An oil body is injected into the cavity, a sealing strip is arranged at the bottom end of the cavity, the elastic plate and the cavity are formed by cutting the moving block, a scraping mechanism is arranged on the side wall of the moving block, parts of the scraping mechanism are taken down from the moving block through self-disassembly, a collecting mechanism is arranged at the bottom end of the moving block, and a mounting mechanism is arranged on the side wall of the collecting mechanism. According to the hydraulic expansion guide rail clamping device, the characteristic that hydraulic oil cannot be compressed is utilized, an oil body is injected into the cavity of the movable block through a hydraulic system, the elastic plate is forced to bend and deform inwards, the locking block is driven to extrude the groove in the side of the guide rail, and flexible locking without mechanical contact is achieved.

Description

Technical Field

[0001] The present invention relates to the field of automated production technology, and in particular to a hydraulic expansion guide rail clamp and a use method thereof. Background Art

[0002] A guide rail clamp is a device used in precision machinery. Its primary function is to mechanically clamp the slide firmly to the guide rail, thereby precisely limiting and fixing the slide's position. Guide rail clamps are widely used in machining, automated production lines, and high-precision equipment, particularly in applications where high-load fixation of the slide is required. However, at present, guide rail clamps usually limit the position of the slider through a mechanical locking mechanism. This locking method relies on physical mechanical friction or fixing devices, such as bolts, retaining springs, etc. to ensure that the slider is fixed on the guide rail. Mechanical locking is usually greatly affected by the external environment, especially under long-term use or high load conditions. The mechanical structure may become loose or fatigued, resulting in unstable locking force, thereby affecting the fixing effect of the slider. When achieving locking, the mechanical locking method usually relies on physical contact and adjustment of mechanical parts such as bolts. Its locking speed and efficiency are relatively low. In applications that require fast switching or locking, the mechanical locking device may not provide sufficient response speed, reducing production efficiency. For this reason, we propose a hydraulic expansion guide rail clamp and a method for using it. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a hydraulic expansion guide rail clamp and a method of using the same. The hydraulic expansion guide rail clamp utilizes the incompressible property of hydraulic oil and injects oil into the cavity of the movable block through the hydraulic system, forcing the elastic plate to bend inward and deform, driving the locking block to squeeze the side groove of the guide rail, thereby achieving flexible locking without mechanical contact. This hydraulic drive method is not affected by the external environment and can maintain a constant locking force under high load conditions.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: a hydraulic expansion rail clamp, comprising a rail body, a rail side groove and a moving block, characterized in that: Guide rail side grooves are provided on both sides of the guide rail body, and a moving block is slidably connected to the guide rail body; An elastic plate and a cavity are integrally formed in the movable block, and a locking block is mounted on the elastic plate; The cavity is used to inject hydraulic oil, and the moving block is provided with an oil circuit interface communicating with the cavity; The hydraulic oil injected into the cavity forces the elastic plate to bend inwardly, thereby driving the locking block to squeeze the side groove of the guide rail, thereby achieving locking of the moving block.

[0005] As a preferred technical solution of the present invention, a scraping mechanism is detachably mounted on the side wall of the movable block for scraping residual oil from the inner wall of the cavity. The scraping mechanism comprises a first chute provided on the side wall of the movable block, a first slider slidably connected to the first chute, a lever connected to the first slider, a screw plugged into the other end of the lever, a nut threadedly connected to the screw, a connecting rod connected to one end of the screw, a first through hole plugged into the other end of the screw and provided in the lever, a scraping plate connected to the inner end of the connecting rod, a plug-in slot provided in the scraping plate and plugged into the connecting rod, a bolt threadedly connected to the scraping plate, a second through hole provided in the connecting rod, and a threaded hole provided in the scraping plate.

[0006] As a preferred technical solution of the present invention, a protrusion is provided on the outer wall of the lever, the diameter of the first through hole is set to be equal to the diameter of the screw rod, and a rubber pad is provided on the end surface of the nut that is in contact with the outer wall of the lever.

[0007] As a preferred technical solution of the present invention, the connecting rod is plugged into the plug-in slot, and the second through hole and the threaded hole have the same diameter and are overlapped.

[0008] As a preferred technical solution of the present invention, the length of the scraper plate is set to be equal to the length of the cavity, the thickness of the scraper plate is set to be equal to the thickness of the cavity, and the inner surface of the cavity is set to be smooth.

[0009] As a preferred technical solution of the present invention, a collecting mechanism is provided at the bottom end of the moving block for collecting the oil scraped from the cavity. The collecting mechanism includes an extension plate arranged on the outer walls on both sides of the bottom end of the moving block, a second slide groove opened in the extension plate, a second slider slidably connected to the second slide groove, and a collection chamber connected to the second slider.

[0010] As a preferred technical solution of the present invention, a mounting mechanism is provided on the side wall of the extension plate, and the second sliding groove is fixed in the extension plate through the mounting mechanism.

[0011] As a preferred technical solution of the present invention, the mounting mechanism includes a third sliding groove opened on the inner wall of the extension plate, a third slider slidably connected to the inner wall of the third sliding groove, a limiting rod connected to the limiting rod and plugged into the extension plate, a return spring wound around the outer wall of the limiting rod, a limiting groove opened in the second slider, and a pull rod fixed on the outer end portion of the limiting rod, wherein one end of the return spring is connected to the outer wall of the third slider, and the other end of the return spring is connected to the inner wall of the extension plate.

[0012] The present invention also provides a method for using the hydraulic expansion rail clamp, the specific method is as follows: S1. Slide the moving block (3) along the guide rail body (1) to the target position; S2. Keep the sealing strip closed and inject pressurized hydraulic oil into the cavity (6) through the oil line interface; the hydraulic oil pressure forces the elastic plate (4) to bend inward, driving the locking block (5) to squeeze the guide rail side groove (2); maintaining the oil pressure to achieve continuous locking of the moving block (3).

[0013] The present invention also provides a maintenance method for a hydraulic expansion rail clamp, the specific method is as follows: S1. Remove the sealing strips around the cavity, first insert the scraper plate from the top of the openings on both sides of the cavity, then insert the inner end of the connecting rod into the insertion slot of the scraper plate. At this time, the second through hole in the connecting rod coincides with the threaded hole in the scraper plate. Insert the bolt into the second through hole and screw it into the threaded hole. Tighten the bolt to fix the connecting rod and the scraper plate. S2. Drive the first slider with the lever to push it into the top of the first slide groove so that the first through hole at the other end of the lever is plugged into the screw rod. Rotate the nut to connect the screw rod until the nut fits the outer wall of the lever to complete the overall installation of the scraping mechanism. S3. Manually hold the protrusion on the outer wall of the lever and move the lever from top to bottom. The lever drives the scraper plate to move downward synchronously through the screw rod to scrape off the oil remaining on the inner wall of the cavity. The scraped oil falls into the collection mechanism below.

[0014] S4. Before cleaning, install the collection mechanism first, pull the pull rod in the installation mechanism on both side walls of the extension plate outward, the pull rod drives the limit rod to move outward, the limit rod slides in the third slide groove through the third slider, squeezes the reset spring, inserts the collection chamber into the second slide groove of the extension plate through the second slider, and slides to the bottom end. At this time, the collection chamber is located directly below the cavity, release the pull rod, the reset spring pushes the limit rod to restore, and the inner end of the limit rod is stuck in the limit groove of the second slider to fix the collection chamber.

[0015] S5. After cleaning is completed, reverse the operation to disassemble the collection mechanism, pull the pull rod outward to disengage the limiting rod from the limiting groove, slide the collection chamber out of the second sliding groove through the second slider, and complete the disassembly of the collection mechanism.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Traditional guide rail clamps rely on mechanical friction or bolts for locking. These can easily loosen and fatigue over time or under high loads, leading to unstable locking force. This hydraulic expansion guide rail clamp utilizes the incompressible nature of hydraulic oil. Oil is injected into the cavity of the moving block through the hydraulic system, forcing the elastic plate to bend inward, driving the locking block to squeeze the groove on the side of the guide rail, achieving flexible locking without mechanical contact. This hydraulic drive method is unaffected by external environmental interference and can maintain a constant locking force under high-load conditions, avoiding the risk of loosening due to mechanical wear and significantly improving the stability and reliability of the slider fixation.

[0017] 2. The mechanical locking method requires manual adjustment of bolts, retaining rings and other components, which is cumbersome to operate and slow to respond, making it difficult to meet the needs of fast switching or locking. This device, on the other hand, can complete locking by quickly injecting hydraulic oil through the hydraulic system, eliminating the need for complex mechanical adjustments. This significantly shortens the locking time and improves production efficiency. In automated production lines or high-precision devices, it can achieve fast and accurate fixation of the slider position, effectively reducing equipment standby time and adapting to the rhythm of efficient production.

[0018] 3. Traditional mechanical locking structures have many components, and the disassembly and maintenance process is complicated. In addition, it is difficult to clean up residual oil. This guide rail clamp is designed with a detachable scraping mechanism and a collecting mechanism. The scraping mechanism is modularly designed and can be quickly disassembled and assembled, making it convenient for staff to thoroughly scrape the residual oil on the inner wall of the cavity; the collecting mechanism uses an installation mechanism to achieve rapid installation and disassembly, which can efficiently collect the oil in the cavity, simplifying the equipment maintenance process, reducing maintenance costs and time, and ensuring long-term stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a three-dimensional cross-sectional state of the moving block structure of the present invention; Figure 3 It is a three-dimensional schematic diagram of the connection structure of the moving block, the scraping mechanism and the mounting mechanism of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the scraping mechanism of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the collecting mechanism of the present invention; Figure 6 This is a schematic diagram of the scraping mechanism of the present invention in a partial structure in an exploded state from a first perspective; Figure 7 This is a schematic diagram of the scraping mechanism of the present invention in a second-angle exploded state; Figure 8 It is a schematic side cross-sectional view of a local structure of the collecting mechanism of the present invention; Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure in the middle.

[0020] Among them: 1. Guide rail body; 2. Guide rail side groove; 3. Moving block; 4. Elastic plate; 5. Locking block; 6. Cavity; 7. Scraping mechanism; 71. First slide groove; 72. First slider; 73. Push rod; 74. Connecting rod; 75. Screw rod; 76. Nut; 77. First through hole; 78. Scraping plate; 79. Connecting slot; 710. Bolt; 711. Second through hole; 712. Threaded hole; 8. Collecting mechanism; 81. Extension plate; 82. Second slide groove; 83. Second slider; 84. Collecting chamber; 9. Mounting mechanism; 91. Third slide groove; 92. Third slider; 93. Limiting rod; 94. Return spring; 95. Limiting slot; 96. Pull rod. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the implementation manner, other embodiments obtained by those skilled in the art without making creative work are all within the scope of protection of the present invention. The experimental methods in the following examples, unless otherwise specified, are all conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0022] Example: like Figure 1 - Figure 9 As shown, this embodiment proposes a hydraulic expansion rail clamp, including a rail body 1, a rail side groove 2 and a moving block 3. The rail side grooves 2 are provided on both sides of the rail body 1, and the moving block 3 is slidably connected to the rail body 1; an elastic plate 4 and a cavity 6 are integrally cut and formed in the moving block 3, and a locking block 5 is installed on the elastic plate 4; the cavity 6 is used to inject hydraulic oil, and the moving block 3 is provided with an oil circuit interface connected to the cavity 6; wherein, the hydraulic oil injected into the cavity 6 forces the elastic plate 4 to bend and deform inward, driving the locking block 5 to squeeze the rail side groove 2, thereby achieving To lock the movable block 3, the oil circuit interface is connected to an external hydraulic pump station via a high-pressure hose. The pump station includes: an electric oil pump that provides an adjustable pressure oil source of 0.5-20 MPa; a solenoid reversing valve that controls the direction of oil injection / exhaust into the cavity 6; a pressure sensor that monitors the oil pressure in the cavity 6 in real time and feeds back to the PLC control system. When the solenoid valve is energized, pressurized oil is injected into the cavity 6 via the oil circuit interface. The incompressible nature of the hydraulic oil causes the elastic plate 4 to instantly deform and lock. When the power is lost, the oil returns to the tank, and the elastic plate 4 resets and releases the lock. The response time is ≤0.1 second. The processing method of the elastic plate 4 and the cavity 6 includes: Step 1: Use wire cutting technology to cut a U-shaped groove on the moving block 3 blank. Figure 2 , retain the elastic plates 4 on both sides and the bottom sealing surface; Step 2: Finish milling the inner wall of the U-shaped groove to a finish of Ra ≤ 0.8 μm to reduce oil residue; Step 3: The thickness of the elastic plate 4 is designed to be 1 / 5-1 / 3 of the thickness of the moving block 3, preferably 2 mm, to ensure that the elastic deformation is ≥ 0.3 mm; Step 4: Install fluororubber sealing strips at the bottom and side openings of cavity 6, with a pressure rating of >25MPa The scraping mechanism 7 scrapes the inner wall of the cavity 6 by moving linearly up and down, and the collecting mechanism 8 collects the oil in the cavity 6. The components of the collecting mechanism 8 are installed and removed by the installation mechanism 9. When the equipment is working, the hydraulic system injects hydraulic oil into the slider cavity through the pipeline. When hydraulic locking is required, the sealing strips on both sides and the bottom of the cavity 6 are removed, and then hydraulic oil is injected into the cavity 6. Since the volume of hydraulic oil is incompressible, this pressure will force the elastic plate 4 to bend and deform inward, causing the elastic plate 4 to deform, thereby driving the locking block 5 to squeeze and lock the position of the guide rail side groove 2; A scraping mechanism 7 is detachably mounted on the side wall of the moving block 3 for scraping residual oil from the inner wall of the cavity 6. The scraping mechanism 7 comprises a first slot 71 formed on the side wall of the moving block 3, a first slider 72 slidably connected to the first slot 71, a lever 73 connected to the first slider 72, a screw 75 plugged into the other end of the lever 73, a nut 76 threadedly connected to the screw 75, a connecting rod 74 connected to one end of the screw 75, a first through hole 77 plugged into the other end of the screw 75 and formed in the lever 73, a scraping plate 78 connected to the inner end of the connecting rod 74, a plug-in slot 79 formed in the scraping plate 78 and plugged into the connecting rod 74, and a bolt 710 threadedly connected to the scraping plate 78. A second through hole 711 formed in the connecting rod 74 and a threaded hole 712 formed in the scraping plate 78 are also included. When the staff needs to scrape and collect the residual oil in the cavity 6, first remove the sealing strips around the cavity 6, then insert the scraping plate 78 from the top of the openings on both sides of the cavity 6, and then plug the inner end of the connecting rod 74 into the plug groove 79. At this time, the second through hole 711 and the threaded hole 712 coincide with each other, and then insert the bolt 710 into the second through hole 711 to the threaded hole 712, and then tighten the bolt 710 so that the bolt 710 and the threaded hole 712 are matched and rotated inward to tighten. After that, the lever 73 drives the first slider 72 to be pushed into the top end of the first slide groove 71 for insertion. At this time, the first through hole 77 at the other end of the lever 73 is inserted into the screw rod 75. Finally, the nut 76 is rotated and connected to the screw rod 75 until it fits with the outer wall of the lever 73 to form a fixed installation. At this time, the lever 73 can be moved from top to bottom, so that the lever 73 drives the scraping plate 78 to move downward synchronously, thereby scraping off the oil remaining on the inner wall of the cavity 6, and the scraped oil falls into the collection mechanism 8 for collection.

[0023] Specifically, the outer wall of the lever 73 is provided with a bump to increase the friction of the outer wall of the lever, making it easier for the operator to manually operate the lever up and down, and improving the control stability when scraping the oil. The diameter of the first through hole 77 is set to be equal to the diameter of the screw rod 75, ensuring that the screw rod 75 and the lever 73 are accurately plugged together, avoiding installation misalignment or shaking due to the diameter difference, and ensuring the reliability of the transmission structure. The end surface of the nut 76 that contacts the outer wall of the lever 73 is provided with a rubber pad to prevent scratches caused by prolonged contact and improve the installation security. The connecting rod 74 is plugged into the plug-in slot 79. The second through hole 711 and the threaded hole 712 are set to have equal diameters and overlap. The bolt 710 passes through the second through hole and the threaded hole to achieve a firm connection between the connecting rod and the scraping plate, ensuring that the structure does not loosen during the scraping process and improving the stability of the scraping action. The length of the scraper plate 78 is set to be equal to the length of the cavity 6, and the thickness of the scraper plate 78 is set to be equal to the thickness of the cavity 6. The size of the scraper plate fits perfectly with the inner wall of the cavity, which can thoroughly scrape off the residual oil and avoid oil accumulation in dead corners. The inner surface of the cavity 6 is set to be smooth. The smooth inner surface of the cavity 6 reduces the adhesion resistance of the oil and accelerates injection and rapid filling.

[0024] A collecting mechanism 8 is provided at the bottom end of the moving block 3 for collecting the oil scraped from the cavity 6. The collecting mechanism 8 includes an extension plate 81 provided on the outer walls of both sides of the bottom end of the moving block 3, a second chute 82 defined in the extension plate 81, a second slider 83 slidably connected to the second chute 82, and a collecting chamber 84 connected to the second slider 83. When the oil in the cavity 6 needs to be collected, the collecting mechanism 8 needs to be installed at the bottom of the moving block 3 in advance. First, the collecting chamber 84 is plugged into the second slide groove 82 through the second slider 83, and then continues to slide to the bottom. At this time, the collecting chamber 84 is located directly below the cavity 6. After removing the sealing strips around the cavity 6, the oil in the cavity 6 will fall into the collecting chamber 84. When the scraping mechanism 7 scrapes off the residual oil, the residual oil will fall into the collecting chamber 84 for collection.

[0025] It is worth noting that a mounting mechanism 9 is provided on the side wall of the extension plate 81, and the second chute 82 is fixed in the extension plate 81 through the mounting mechanism 9; The mounting mechanism 9 includes a third sliding groove 91 provided on the inner wall of the extension plate 81, a third slider 92 slidably connected to the inner wall of the third sliding groove 91, a limiting rod 93 connected to the limiting rod 93 and plugged into the extension plate 81, a return spring 94 wound around the outer wall of the limiting rod 93, a limiting groove 95 provided in the second slider 83, and a pull rod 96 fixed to the outer end of the limiting rod 93.

[0026] Before inserting and installing the collection chamber 84, first pull the pull rods 96 at both ends outward, so that the pull rods 96 drive the limit rod 93 to move outward, and the limit rod 93 slides outward in the third slide groove 91 through the third slider 92. During the sliding process, the return spring 94 is squeezed to produce deformation until the inner end of the limit rod 93 is pulled into the extension plate 81. At this time, after the collection chamber 84 is moved to the inner end of the second slide groove 82 through the second slider 83, the pulled pull rod 96 is loosened. At this time, the restoring force generated by the elasticity of the return spring 94 itself pushes the limit rod 93 to restore, so that the inner end of the limit rod 93 is engaged with the limit groove 95 in the second slider 83 to form a fixed position. Similarly, the above operation can be reversed to disassemble the collection chamber 84. It is worth noting that one end of the reset spring 94 is connected to the outer wall of the third slider 92, and the other end of the reset spring 94 is connected to the inner wall of the extension plate 81. When the pull rod 96 is pulled, the reset spring is compressed to store energy; after being released, the spring reset force pushes the limit rod 93 to engage in the limit groove 95, automatically completing the fixation of the collection chamber and ensuring the reliability of the connection structure.

[0027] A method for using a hydraulic expansion rail clamp, the specific steps are as follows: S1. The moving block 3 slides along the guide rail body 1 to the target position; S2. Keeping the sealing strip closed, pressurized hydraulic oil is injected into cavity 6 through the oil line interface. The hydraulic oil pressure forces the elastic plate 4 to bend inward, driving the locking block 5 to squeeze the guide rail side groove 2. Maintaining the oil pressure ensures that the movable block 3 is continuously locked.

[0028] A maintenance method for a hydraulic expansion rail clamp, the specific steps are as follows: S1. Remove the sealing strips around the cavity 6, first insert the scraper plate 78 from the top of the openings on both sides of the cavity 6, then insert the inner end of the connecting rod 74 into the insertion groove 79 of the scraper plate 78. At this time, the second through hole 711 in the connecting rod 74 coincides with the threaded hole 712 in the scraper plate 78, insert the bolt 710 into the second through hole 711 and screw it into the threaded hole 712, tighten the bolt 710 to fix the connecting rod 74 and the scraper plate 78. S2. Drive the first slider 72 with the lever 73 from the top of the first slide groove 71 and insert it, so that the first through hole 77 at the other end of the lever 73 is inserted into the screw rod 75, and rotate the nut 76 to connect with the screw rod 75 until the nut 76 fits the outer wall of the lever 73, completing the overall installation of the scraping mechanism 7. S3. Manually hold the protrusion on the outer wall of the lever 73 and move the lever 73 from top to bottom. The lever 73 drives the scraper plate 78 to move downward synchronously through the screw rod 75 to scrape off the oil remaining on the inner wall of the cavity 6. The scraped oil falls into the collection mechanism 8 below.

[0029] S4. Before cleaning, install the collecting mechanism 8 first, pull outward the pull rod 96 in the installation mechanism 9 on both side walls of the extension plate 81, the pull rod 96 drives the limiting rod 93 to move outward, the limiting rod 93 slides in the third slide groove 91 through the third slider 92, squeezes the reset spring 94, and inserts the collecting chamber 84 into the second slide groove 82 of the extension plate 81 through the second slider 83, and slides to the bottom end. At this time, the collecting chamber 84 is located directly below the cavity 6, release the pull rod 96, the reset spring 94 pushes the limiting rod 93 to restore, and the inner end of the limiting rod 93 is stuck in the limiting groove 95 of the second slider 83 to fix the collecting chamber 84.

[0030] S5. After cleaning is completed, reverse the operation to disassemble the collecting mechanism 8, pull the pull rod 96 outward to disengage the limiting rod 93 from the limiting groove 95, and slide the collecting chamber 84 out of the second sliding groove 82 through the second slider 83 to complete the disassembly of the collecting mechanism 8.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned implementation rules. The above-mentioned implementation rules and description are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic expansion rail clamp, comprising a rail body (1), a rail side groove (2) and a moving block (3), characterized in that: Guide rail side grooves (2) are provided on both sides of the guide rail body (1), and a moving block (3) is slidably connected to the guide rail body (1); An elastic plate (4) and a cavity (6) are integrally formed in the movable block (3), and a locking block (5) is mounted on the elastic plate (4); The cavity (6) is used to inject hydraulic oil, and the moving block (3) is provided with an oil circuit interface communicating with the cavity (6); The hydraulic oil injected into the cavity (6) forces the elastic plate (4) to bend and deform inward, driving the locking block (5) to squeeze the guide rail side groove (2), thereby achieving locking of the moving block (3).

2. The hydraulic expansion rail clamp according to claim 1, characterized in that: A scraping mechanism (7) is detachably mounted on the side wall of the moving block (3) for scraping residual oil from the inner wall of the cavity (6). The scraping mechanism (7) comprises a first chute (71) provided on the side wall of the moving block (3), a first slider (72) slidably connected to the first chute (71), a shifting rod (73) connected to the first slider (72), a screw rod (75) plugged into the other end of the shifting rod (73), a nut (76) threadedly connected to the screw rod (75), and a screw threadedly connected to the screw rod (75). a connecting rod (74) connected to one end of the screw rod (75), a first through hole (77) inserted into the other end of the screw rod (75) and provided in the shift rod (73), a scraper plate (78) connected to the inner end of the connecting rod (74), a plug slot (79) provided in the scraper plate (78) and inserted into the connecting rod (74), a bolt (710) threadedly connected to the scraper plate (78), a second through hole (711) provided in the connecting rod (74), and a threaded hole (712) provided in the scraper plate (78).

3. The hydraulic expansion rail clamp according to claim 2, characterized in that: The outer wall of the shifting rod (73) is provided with a protrusion, the diameter of the first through hole (77) is set to be equal to the diameter of the screw rod (75), and a rubber cushion is provided on the end surface of the nut (76) that is in contact with the outer wall of the shifting rod (73).

4. The hydraulic expansion rail clamp according to claim 2, characterized in that: The connecting rod (74) is plugged into the plug slot (79), and the second through hole (711) and the threaded hole (712) have equal diameters and are arranged to overlap.

5. The hydraulic expansion rail clamp according to claim 2, characterized in that: The length of the scraping plate (78) is set to be equal to the length of the cavity (6), the thickness of the scraping plate (78) is set to be equal to the thickness of the cavity (6), and the inner surface of the cavity (6) is set to be smooth.

6. The hydraulic expansion rail clamp according to claim 1, characterized in that: The bottom end of the moving block (3) is provided with a collecting mechanism (8) for collecting the oil scraped from the cavity (6). The collecting mechanism (8) comprises an extension plate (81) provided on the outer walls on both sides of the bottom end of the moving block (3), a second chute (82) provided in the extension plate (81), a second slider (83) slidably connected to the second chute (82), and a collecting chamber (84) connected to the second slider (83).

7. The hydraulic expansion rail clamp according to claim 6, characterized in that: A mounting mechanism (9) is provided on the side wall of the extension plate (81), and the second sliding groove (82) is fixed in the extension plate (81) through the mounting mechanism (9).

8. The hydraulic expansion rail clamp according to claim 7, characterized in that: The mounting mechanism (9) includes a third sliding groove (91) provided on the inner wall of the extension plate (81), a third slider (92) slidably connected to the inner wall of the third sliding groove (91), a limiting rod (93) connected to the limiting rod (93) and plugged into the extension plate (81), a return spring (94) wound around the outer wall of the limiting rod (93), a limiting groove (95) provided in the second slider (83), and a pull rod (96) fixed to the outer end of the limiting rod (93), wherein one end of the return spring (94) is connected to the outer wall of the third slider (92), and the other end of the return spring (94) is connected to the inner wall of the extension plate (81).

9. A method for using a hydraulic expansion rail clamp according to any one of claims 1 to 8, characterized in that: S1. Slide the moving block (3) along the guide rail body (1) to the target position; S2. Keep the sealing strip closed and inject pressurized hydraulic oil into the cavity (6) through the oil line interface; the hydraulic oil pressure forces the elastic plate (4) to bend inward, driving the locking block (5) to squeeze the guide rail side groove (2); maintaining the oil pressure to achieve continuous locking of the moving block (3).

10. A maintenance method for a hydraulic expansion rail clamp according to any one of claims 1 to 8, characterized in that: S1. Remove the sealing strips around the cavity (6), first insert the scraper plate (78) from the top of the openings on both sides of the cavity (6), then insert the inner end of the connecting rod (74) into the insertion groove (79) of the scraper plate (78), at this time, the second through hole (711) in the connecting rod (74) coincides with the threaded hole (712) in the scraper plate (78), insert the bolt (710) into the second through hole (711) and screw it into the threaded hole (712), tighten the bolt (710) to fix the connecting rod (74) and the scraper plate (78). S2. The lever (73) drives the first slider (72) to be pushed into the top of the first slide groove (71) so that the first through hole (77) at the other end of the lever (73) is plugged into the screw rod (75). The nut (76) is rotated to connect with the screw rod (75) until the nut (76) fits the outer wall of the lever (73), thereby completing the overall installation of the scraping mechanism (7). S3. Manually hold the protrusion on the outer wall of the lever (73) and move the lever (73) from top to bottom. The lever (73) drives the scraper (78) to move downward synchronously through the screw (75) to scrape off the oil remaining on the inner wall of the cavity (6). The scraped oil falls into the collection mechanism (8) below. S4. Before cleaning, first install the collecting mechanism (8), pull outward the pull rod (96) in the installation mechanism (9) on both side walls of the extension plate (81), the pull rod (96) drives the limiting rod (93) to move outward, the limiting rod (93) slides in the third slide groove (91) through the third slider (92), squeezes the return spring (94), inserts the collecting chamber (84) into the second slide groove (82) of the extension plate (81) through the second slider (83), and slides to the bottom. At this time, the collecting chamber (84) is located directly below the cavity (6), loosens the pull rod (96), and the return spring (94) pushes the limiting rod (93) to restore. The inner end of the limiting rod (93) is stuck in the limiting groove (95) of the second slider (83), fixing the collecting chamber (84). S5. After cleaning is completed, reverse the operation to disassemble the collecting mechanism (8), pull the pull rod (96) outward to disengage the limiting rod (93) from the limiting groove (95), and slide the collecting chamber (84) out of the second sliding groove (82) through the second slider (83), thereby completing the disassembly of the collecting mechanism (8).

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