Hydraulic clamp

Abstract

The utility model relates to a hydraulic clamp and belongs to the technical field of tool clamps, the hydraulic clamp comprises a hydraulic cylinder, a clamping plate, a solid structure, a guide rod and high-pressure equipment, a driving shaft of the hydraulic cylinder drives the clamping plate to move so as to clamp and fix a workpiece together with the solid structure, a guide hole is formed in a cylinder body of the hydraulic cylinder, a first through hole is formed in the clamping plate, and a second through hole is formed in the second through hole. One end of the guide rod is fixedly installed in the first through hole, the other end of the guide rod is sealed and slidably inserted in the guide hole, the guide rod is provided with a channel communicating the guide hole and the first through hole, the high-pressure equipment is connected to the end, away from the clamping plate, of the guide hole, and the high-pressure equipment is used for conveying high-pressure gas or high-pressure liquid to the guide hole. According to the hydraulic clamp provided by the invention, the effect of integrating the cleaning device into the hydraulic cylinder is achieved, the work of cleaning a workpiece is more convenient and faster, and the integration level of the device is improved.

Description

Technical Field

[0001] This application relates to the field of tooling and fixture technology, and in particular to a hydraulic clamp. Background Technology

[0002] A fixture is a process device used during machining to quickly secure the workpiece and maintain the correct relative position of the machine tool, cutting tool, and workpiece. When using a fixture, it is essential to ensure that no foreign matter adheres to it.

[0003] However, in actual processing, waste chips and waste liquids often adhere to the surface of the fixture and the workpiece in contact, which can not only easily contaminate or scratch the workpiece surface, but also cause positioning deviations in the workpiece, resulting in processing errors. Utility Model Content

[0004] Therefore, it is necessary to provide a hydraulic clamp to solve the technical problem in the prior art where waste chips and waste liquids adhere to the workpiece and affect the machining process.

[0005] To achieve the above objectives, this application provides a hydraulic clamp, which includes:

[0006] A hydraulic cylinder includes a cylinder body and a drive shaft mounted on the cylinder body, and a guide hole is provided on the cylinder body;

[0007] A clamping plate is mounted on the drive shaft and is used to clamp the workpiece. The clamping plate is provided with a first through hole corresponding to the guide hole.

[0008] The solid structure is located on the side of the clamping plate away from the hydraulic cylinder. The distance between the solid structure and the clamping plate is set so that the clamping plate and the solid structure clamp and fix the workpiece during the process of the drive shaft driving the clamping plate to move.

[0009] A guide rod, one end of which is fixedly installed in the first through hole, and the other end of which is sealed and slidably inserted into the guide hole, wherein the guide rod is provided with a channel connecting the guide hole and the first through hole; and

[0010] High-pressure equipment is connected to the end of the guide hole away from the clamping plate. The high-pressure equipment is used to deliver high-pressure gas or high-pressure liquid into the guide hole.

[0011] Optionally, a first annular stop is provided at the port of the guide hole facing the clamping plate, the diameter of the guide rod is adapted to the diameter of the inner ring surface of the first annular stop, and a second annular stop is provided at the end of the guide rod inside the guide hole, the diameter of the outer ring surface of the second annular stop is adapted to the diameter of the guide hole.

[0012] Optionally, a first sealing ring is embedded on the outer circumferential surface of the second annular flange, the first sealing ring being used to seal the gap between the second annular flange and the guide hole.

[0013] Optionally, a second sealing ring is embedded on the inner ring surface of the first annular flange, the second sealing ring being used to seal the gap between the guide rod and the first annular flange.

[0014] Optionally, multiple second sealing rings are provided, and the multiple second sealing rings are distributed sequentially at intervals along the axial direction of the first annular flange.

[0015] Optionally, the drive shaft is connected to the center of the clamping plate, and multiple guide holes and guide rods are provided. The multiple guide holes and multiple guide rods correspond one-to-one, and the multiple guide holes are evenly distributed around the circumference of the drive shaft.

[0016] Optionally, two guide holes and two guide rods are provided, with the two guide holes symmetrically arranged on opposite sides of the drive shaft.

[0017] Optionally, the hydraulic clamp also includes a cover plate, which is disposed on the end face of the hydraulic cylinder away from the clamping plate. The cover plate is provided with a second through hole communicating with the guide hole, and the diameter of the second through hole is smaller than the diameter of the guide hole.

[0018] Optionally, an annular groove is provided at the edge of the guide hole near the port of the cover plate, and a third sealing ring is embedded in the annular groove to seal the gap between the guide hole and the cover plate.

[0019] The beneficial effects of the hydraulic clamp provided in this application are as follows: Compared with the prior art, the hydraulic clamp of this application includes a hydraulic cylinder, a clamping plate, a solid structure, a guide rod, and a high-pressure device. The drive shaft of the hydraulic cylinder drives the clamping plate to move, thereby clamping and fixing the workpiece together with the solid structure. The cylinder body of the hydraulic cylinder is provided with a guide hole, and the clamping plate is provided with a first through hole. The two ends of the guide rod are respectively installed in the first through hole and the guide hole. The guide rod is also provided with a channel connecting the guide hole and the first through hole. The high-pressure device delivers high-pressure gas or high-pressure liquid to the guide hole and outputs it from the first through hole, realizing the effect of integrating the cleaning device into the hydraulic cylinder, making the cleaning of the workpiece more convenient and faster, and improving the integration of the device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the hydraulic clamp provided in the embodiments of this application;

[0022] Figure 2 This is a cross-sectional structural diagram of the hydraulic clamp provided in the embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Hydraulic cylinder; 110. Cylinder body; 120. Drive shaft; 130. Guide hole; 140. First annular flange; 2. Clamping plate; 210. First through hole; 3. Guide rod; 310. Channel; 320. Second annular flange; 4. First sealing ring; 5. Second sealing ring; 6. Cover plate; 610. Second through hole; 7. Third sealing ring. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] An embodiment of this application provides a hydraulic clamp, which can be found in the accompanying documentation. Figures 1 to 2 The hydraulic clamp includes a hydraulic cylinder 1, a clamping plate 2, a solid structure, a guide rod 3, and a high-pressure device. The hydraulic cylinder 1 includes a cylinder body 110 and a drive shaft 120 mounted on the cylinder body 110. The cylinder body 110 has a guide hole 130. The clamping plate 2 is mounted on the drive shaft 120 and is used to clamp the workpiece. The clamping plate 2 has a first through hole 210 corresponding to the guide hole 130. The solid structure is located on the side of the clamping plate 2 away from the hydraulic cylinder 1, and the distance between the solid structure and the clamping plate 2 is... The configuration is such that, during the movement of the clamping plate 2 driven by the drive shaft 120, the clamping plate 2 and the solid structure clamp and fix the workpiece; one end of the guide rod 3 is fixedly installed in the first through hole 210, and the other end of the guide rod 3 is sealed and slidably inserted into the guide hole 130. The guide rod 3 is provided with a channel 310 connecting the guide hole 130 and the first through hole 210; the high-pressure device is connected to the end of the guide hole 130 away from the clamping plate 2, and the high-pressure device is used to deliver high-pressure gas or high-pressure liquid to the guide hole 130.

[0032] In this embodiment, the hydraulic clamp includes a hydraulic cylinder 1, a clamping plate 2, a solid structure, a guide rod 3, and a high-pressure device. The drive shaft 120 of the hydraulic cylinder 1 drives the clamping plate 2 to move, thereby clamping and fixing the workpiece together with the solid structure. The cylinder body 110 of the hydraulic cylinder 1 is provided with a guide hole 130, and the clamping plate 2 is provided with a first through hole 210. The two ends of the guide rod 3 are respectively installed in the first through hole 210 and the guide hole 130. The guide rod 3 is also provided with a channel 310 connecting the guide hole 130 and the first through hole 210. The high-pressure device delivers high-pressure gas or high-pressure liquid to the guide hole 130 and outputs it from the first through hole 210, realizing the effect of integrating the cleaning device into the hydraulic cylinder 1, making the cleaning of the workpiece more convenient and faster, and improving the integration of the device.

[0033] Furthermore, the channel 310 of the cleaning device and the guide structure (guide hole 130 and guide rod 3) of the hydraulic clamp are integrated together, so that the guide structure can also serve as a channel 310 for conveying high-pressure gas or high-pressure liquid, further improving the integration of the device.

[0034] It is also understandable that the hydraulic cylinder 1 generates a large amount of heat during use, which is concentrated in the cylinder body 110 and can easily have an adverse effect on the driving of the hydraulic cylinder 1. However, the channel 310 for conveying high-pressure gas or high-pressure liquid is integrated into the cylinder body 110 in this application, and the high-pressure gas or high-pressure liquid can also carry away the heat inside the cylinder body 110, thus achieving the effect of cooling the cylinder body 110.

[0035] In one embodiment, see Figure 2 A first annular stop 140 is provided at the port of the guide hole 130 facing the clamping plate 2. The diameter of the guide rod 3 is adapted to the diameter of the inner annular surface of the first annular stop 140. A second annular stop 320 is provided at the end of the guide rod 3 inside the guide hole 130. The diameter of the outer annular surface of the second annular stop 320 is adapted to the diameter of the guide hole 130.

[0036] With the above settings, when the drive shaft 120 drives the clamping plate 2 to move away from the cylinder 110, after moving a certain distance, the first annular stop 140 will come into contact with the second annular stop 320 to block the second annular stop 320, thereby preventing the guide rod 3 from leaving the guide hole 130.

[0037] In one embodiment, see Figure 2 A first sealing ring 4 is embedded on the outer circumferential surface of the second annular retaining edge 320. The first sealing ring 4 is used to seal the gap between the second annular retaining edge 320 and the guide hole 130, thereby improving the sealing performance between the second annular retaining edge 320 and the guide hole 130 and thus improving the cleaning effect.

[0038] In one embodiment, see Figure 2 A second sealing ring 5 is embedded on the inner ring surface of the first annular flange 140. The second sealing ring 5 is used to seal the gap between the guide rod 3 and the first annular flange 140, thereby improving the sealing performance between the guide rod 3 and the first annular flange 140 and thus improving the cleaning effect.

[0039] In one embodiment, see Figure 2 Multiple second sealing rings 5 ​​are provided, and the multiple second sealing rings 5 ​​are distributed sequentially at intervals along the axial direction of the first annular flange 140, which further improves the sealing performance between the guide rod 3 and the first annular flange 140.

[0040] In one embodiment, please refer to [the relevant documentation / reference]. Figure 1 and Figure 2 The drive shaft 120 is connected to the center of the clamping plate 2. Multiple guide holes 130 and multiple guide rods 3 are provided. The multiple guide holes 130 and multiple guide rods 3 correspond one-to-one. The multiple guide holes 130 are evenly distributed around the circumference of the drive shaft 120, so that the clamping plate 2 is subjected to uniform force and the stability of the movement of the clamping plate 2 is improved.

[0041] In one embodiment, please refer to [the relevant documentation / reference]. Figure 1 and Figure 2 There are two guide holes 130 and two guide rods 3, and the two guide holes 130 are symmetrically arranged on opposite sides of the drive shaft 120.

[0042] In one embodiment, see Figure 2 The hydraulic clamp also includes a cover plate 6, which is disposed on the end face of the hydraulic cylinder 1 away from the clamping plate 2. The cover plate 6 is provided with a second through hole 610 communicating with the guide hole 130. The diameter of the second through hole 610 is smaller than the diameter of the guide hole 130.

[0043] Thus, when the drive shaft 120 drives the clamping plate 2 to move closer to the cylinder 110, the baffle will come into contact with the second annular flange 320 to block the second annular flange 320, thereby preventing the guide rod 3 from disengaging from the guide hole 130.

[0044] In one embodiment, see Figure 2 An annular groove is provided at the edge of the guide hole 130 near the port of the cover plate 6. A third sealing ring 7 is embedded in the annular groove. The third sealing ring 7 is used to seal the gap between the guide hole 130 and the cover plate 6, thereby improving the sealing performance between the guide hole 130 and the cover plate 6.

[0045] In other embodiments, the physical structure can be a steel plate, or the physical structure can be a mirror image of the hydraulic cylinder 1, clamping plate 2 and guide rod 3 described above.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A hydraulic clamp, characterized in that, include: A hydraulic cylinder includes a cylinder body and a drive shaft disposed on the cylinder body, wherein a guide hole is provided on the cylinder body; A clamping plate is disposed on the drive shaft. The clamping plate is used to clamp the workpiece. The clamping plate is provided with a first through hole corresponding to the guide hole. A solid structure is disposed on the side of the clamping plate away from the hydraulic cylinder. The solid structure is spaced apart from the clamping plate. During the process of the clamping plate being moved by the drive shaft, the clamping plate and the solid structure clamp and fix the workpiece. A guide rod, one end of which is fixedly installed in the first through hole, and the other end of which is sealed and slidably inserted into the guide hole, wherein the guide rod is provided with a channel connecting the guide hole and the first through hole; and A high-pressure device is connected to the end of the guide hole away from the clamping plate, and the high-pressure device is used to deliver high-pressure gas or high-pressure liquid to the guide hole.

2. The hydraulic clamp according to claim 1, characterized in that, A first annular stop is provided at the port of the guide hole facing the clamping plate. The diameter of the guide rod is adapted to the diameter of the inner annular surface of the first annular stop. A second annular stop is provided at the end of the guide rod inside the guide hole. The diameter of the outer annular surface of the second annular stop is adapted to the diameter of the guide hole.

3. The hydraulic clamp according to claim 2, characterized in that, A first sealing ring is embedded on the outer circumferential surface of the second annular stop, and the first sealing ring is used to seal the gap between the second annular stop and the guide hole.

4. The hydraulic clamp according to claim 3, characterized in that, A second sealing ring is embedded on the inner ring surface of the first annular flange, and the second sealing ring is used to seal the gap between the guide rod and the first annular flange.

5. The hydraulic clamp according to claim 4, characterized in that, Multiple second sealing rings are provided, and the multiple second sealing rings are distributed sequentially at intervals along the axial direction of the first annular flange.

6. The hydraulic clamp according to any one of claims 1-5, characterized in that, The drive shaft is connected to the center of the clamping plate. Multiple guide holes and multiple guide rods are provided, and the multiple guide holes and multiple guide rods correspond one-to-one. The multiple guide holes are evenly distributed around the circumference of the drive shaft.

7. The hydraulic clamp according to claim 6, characterized in that, Both the guide hole and the guide rod are provided in twos, and the two guide holes are symmetrically arranged on opposite sides of the drive shaft.

8. The hydraulic clamp according to any one of claims 1-5, characterized in that, The hydraulic clamp also includes a cover plate, which is disposed on the end face of the hydraulic cylinder away from the clamping plate. The cover plate is provided with a second through hole communicating with the guide hole, and the diameter of the second through hole is smaller than the diameter of the guide hole.

9. The hydraulic clamp according to claim 8, characterized in that, An annular groove is provided at the edge of the guide hole near the port of the cover plate, and a third sealing ring is embedded in the annular groove. The third sealing ring is used to seal the gap between the guide hole and the cover plate.

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