Pressing force adjusting device for hydraulic element

Abstract

The utility model relates to the technical field of pressing force adjustment, in particular to a hydraulic element pressing force adjusting device which comprises a hydraulic head, a cylindrical groove is formed in the lower end of the hydraulic head, a sealing block is installed in the cylindrical groove in a sealed and sliding mode, and a movable column is installed on the lower surface of the sealing block through a connecting column. A pressing plate is installed at one end of the movable column, the movable column is sleeved with a pressing spring, a connecting pipe is fixedly installed on the side face of the hydraulic head, one end of the connecting pipe is connected with a rectangular barrel, an air inlet pipe is fixedly connected to the upper end of the rectangular barrel, and an air collecting assembly used for collecting air into the rectangular barrel is arranged in the rectangular barrel. According to the utility model, through the mutual cooperation of the gas collection assembly, the rectangular cylinder, the gas inlet pipe and the connecting pipe, gas is filled into the cylindrical groove, and the pressing force of the hydraulic element is changed by changing the pressure intensity of the cylindrical groove and changing the pressing force, and the existing adjustment of an adjusting bolt and a threaded cylinder is abandoned, so that the pressing force is prevented from being changed in the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of pressing force adjustment, in particular to a hydraulic element pressing force adjustment device. Background Art

[0002] When testing a workpiece, a clamp controlled by a hydraulic element is used to tighten the workpiece. During tightening, the pressure between the hydraulic element and the clamp must be adjusted to ensure that the workpiece is securely fixed without damaging it.

[0003] A Chinese patent with publication number CN218082275U discloses a hydraulic element clamping force adjustment device, including a fixed seat, a hydraulic head and a floating pressure plate. An annular slide is opened at the lower end of the fixed seat, and an annular pressure piece is provided in the annular slide. The annular pressure piece slides with the annular slide. The upper end of the annular pressure piece is connected to a rotary lock assembly provided at the upper end of the fixed seat. The lower end of the annular pressure piece is connected to a spring, and the bottom end of the spring is fixedly connected to the upper end of the floating pressure plate. It is easy to operate and the staff can make detailed adjustments to the clamping force of the workpiece according to the current situation.

[0004] In the above patent document, when adjusting the clamping force, the clamping force is adjusted by rotating the adjusting bolt and the threaded barrel relative to each other. However, during use of the device, the adjusting bolt and the threaded barrel may become loose, resulting in an error in the clamping force. Utility Model Content

[0005] The purpose of the utility model is to solve the following shortcomings in the prior art: during use of the device, looseness may occur between the adjusting bolt and the threaded barrel, resulting in errors in the clamping force, and a hydraulic element clamping force adjustment device is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A hydraulic element pressing force adjustment device comprises a hydraulic head, a cylindrical groove is formed at the lower end of the hydraulic head, a sealing block is sealingly and slidingly installed in the cylindrical groove, a connecting column is fixedly installed on the lower surface of the sealing block, a movable column is fixedly installed at one end of the connecting column, one end of the movable column passes through the cylindrical groove and is fixedly installed with a pressure plate, a compression spring is sleeved on the movable column, the two ends of the compression spring are respectively fixedly connected to the pressure plate and the lower end of the hydraulic head, and a limiting component for limiting the movement of the movable column is provided in the cylindrical groove;

[0008] A connecting pipe connected to the inside of the cylindrical groove is fixedly installed on the side of the hydraulic head, and the end of the connecting pipe away from the hydraulic head is fixedly connected to a rectangular cylinder, and the upper end of the rectangular cylinder is fixedly connected to an air intake pipe. A first one-way valve is installed in the connecting pipe, and a second one-way valve is installed in the air intake pipe. An air collecting component for collecting air into the rectangular cylinder is provided in the rectangular cylinder.

[0009] Preferably, the limiting assembly includes two blocks symmetrically fixedly mounted on the inside of the cylindrical groove, and the two blocks are located between the sealing block and the movable column.

[0010] Preferably, the gas collecting assembly includes a push plate sealingly and slidingly mounted in the rectangular tube and a push rod mounted in the rectangular tube via an elastic component, the upper end of the push rod is fixedly connected to the push plate, and a pull rod is fixedly mounted on the lower end of the push rod.

[0011] Preferably, the elastic component includes a bracket fixedly installed in the rectangular tube and a first telescopic spring sleeved on the push rod, and two ends of the first telescopic spring are fixedly connected to the bracket and the push plate respectively.

[0012] Preferably, an L-shaped transparent tube connected to the cylindrical groove is installed on the side of the hydraulic head, and an indicator block is slidably installed in the transparent tube through a second telescopic spring seal.

[0013] Preferably, a pressure relief pipe is fixedly connected to the transparent tube, a sealing plug is inserted into the pressure relief pipe, and one end of the sealing plug is inserted into the transparent tube.

[0014] In the utility model, the beneficial effects are:

[0015] When adjusting the clamping force, gas is filled into the cylindrical groove through the mutual cooperation of the gas collecting assembly, rectangular cylinder, air inlet pipe and connecting pipe, thereby changing the clamping force of the hydraulic component by changing the pressure of the space formed between the sealing block and the cylindrical groove. The first one-way valve can prevent gas from overflowing, abandoning the existing adjustment bolt and threaded cylinder adjustment, and avoiding changes in the clamping force during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a hydraulic element pressing force adjustment device proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of a hydraulic element pressing force adjustment device proposed by the utility model;

[0018] Figure 3 for Figure 2 A magnified view of the structure at center A;

[0019] Figure 4 for Figure 2Enlarged view of the structure at point B in the middle.

[0020] In the figure: 1 hydraulic head, 2 sealing block, 3 connecting column, 4 moving column, 5 pressure plate, 6 compression spring, 7 connecting pipe, 8 rectangular cylinder, 9 air intake pipe, 10 stopper, 11 push plate, 12 push rod, 13 pull rod, 14 first telescopic spring, 15 transparent tube, 16 second telescopic spring, 17 indicator block, 18 pressure relief pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-Figure 4 A hydraulic element clamping force adjustment device includes a hydraulic head 1, a cylindrical groove is opened at the lower end of the hydraulic head 1, a sealing block 2 is sealingly and slidingly installed in the cylindrical groove, a connecting column 3 is fixedly installed on the lower surface of the sealing block 2, a moving column 4 is fixedly installed at one end of the connecting column 3, one end of the moving column 4 passes through the cylindrical groove and is fixedly installed with a pressure plate 5, a compression spring 6 is sleeved on the moving column 4, and the two ends of the compression spring 6 are fixedly connected to the pressure plate 5 and the lower end of the hydraulic head 1 respectively, a limit assembly for limiting the movement of the moving column 4 is provided in the cylindrical groove, and the limit assembly includes two blocks 10 symmetrically fixedly installed on the inside of the cylindrical groove, and the two blocks 10 are located between the sealing block 2 and the moving column 4.

[0023] Under the action of the elastic force of the compression spring 6, the pressure plate 5 and the movable column 4 tend to move downward, so that the sealing block 2 contacts the two blocks 10. Under the action of the blocks 10, the sealing block 2 and the movable column 4 are prevented from moving out of the cylindrical groove.

[0024] A connecting pipe 7 connected to the inside of the cylindrical groove is fixedly installed on the side of the hydraulic head 1. The end of the connecting pipe 7 away from the hydraulic head 1 is fixedly connected to a rectangular cylinder 8. The upper end of the rectangular cylinder 8 is fixedly connected to an air intake pipe 9. A first one-way valve is installed in the connecting pipe 7, and a second one-way valve is installed in the air intake pipe 9. An air collecting component for collecting air into the rectangular cylinder 8 is provided in the rectangular cylinder 8.

[0025] The first one-way valve only allows gas to flow from the rectangular tube 8 to the cylindrical groove, and the second one-way valve only allows gas to enter the rectangular tube 8 from the outside. Gas can be continuously collected into the rectangular tube 8 through the gas collecting component, and the gas can enter the cylindrical groove through the connecting pipe 7. A sealed space is formed between the upper surface of the sealing block 2 and the inner wall of the cylindrical groove. As the gas continuously enters the sealed space, the pressure in the cylindrical groove will change. Therefore, when the pressure plate 5 contacts the workpiece, the higher the pressure in the cylindrical groove, the more difficult it is for the movable column 4 to move in the cylindrical groove, and the greater the clamping force. The pressure in the cylindrical groove can be controlled by the gas collecting component to adjust the clamping force of the hydraulic component, and the existing adjustment bolt and threaded tube adjustment can be abandoned to avoid changes in the clamping force during use.

[0026] The gas collecting assembly includes a push plate 11 sealed and slidably installed in the rectangular tube 8 and a push rod 12 installed in the rectangular tube 8 through an elastic component. The upper end of the push rod 12 is fixedly connected to the push plate 11, and the lower end of the push rod 12 is fixedly installed with a pull rod 13. The elastic component includes a bracket fixedly installed in the rectangular tube 8 and a first telescopic spring 14 sleeved on the push rod 12. The two ends of the first telescopic spring 14 are respectively fixedly connected to the bracket and the push plate 11.

[0027] The push rod 12 is installed in the rectangular tube 8 through the first telescopic spring 14. When it is necessary to collect air in the rectangular tube 8, the push rod 12 can be driven to move back and forth up and down by pulling the pull rod 13, thereby driving the push plate 11 to move up and down in the rectangular tube 8. When the push plate 11 moves downward in the rectangular tube 8, external gas can enter the rectangular tube 8 through the air inlet pipe 9. When the push plate 11 moves upward in the rectangular tube 8, the gas in the rectangular tube 8 will be pushed into the cylindrical groove through the connecting tube 7, thereby changing the pressure in the sealed space between the inner wall of the cylindrical groove and the upper surface of the sealing block 2.

[0028] An L-shaped transparent tube 15 connected to the cylindrical groove is installed on the side of the hydraulic head 1. An indicator block 17 is installed in the transparent tube 15 in a sealed and slidable manner through a second telescopic spring 16. A pressure relief pipe 18 is fixedly connected to the transparent tube 15. A sealing plug is inserted into the pressure relief pipe 18. One end of the sealing plug is inserted into the transparent tube 15. When the sealing plug is inserted into the transparent tube 15, it will block the transparent tube 15.

[0029] The transparent tube 15 is a tube made of transparent material. When the clamping force needs to be adjusted, one end of the sealing plug is removed from the transparent tube 15 instead of from the pressure relief tube 18. At this time, when adjusting the pressure in the cylindrical groove, the pressure can be judged by judging the movement of the indicator block 17 in the transparent tube 15. The more the indicator block 17 moves downward, the more the second telescopic spring 16 is compressed, and the greater the pressure in the cylindrical groove. Conversely, the less the indicator block 17 moves, the smaller the pressure in the cylindrical groove.

[0030] In the present invention, when adjusting the clamping force, gas can be continuously collected into the rectangular cylinder 8 through the gas collecting component, and the gas can pass through the connecting pipe 7 into the cylindrical groove, and a sealed space is formed between the upper surface of the sealing block 2 and the inner wall of the cylindrical groove. As the gas continuously enters the sealed space, the pressure in the cylindrical groove will change. Therefore, when the pressure plate 5 contacts the workpiece, the higher the pressure in the cylindrical groove, the more difficult it is for the movable column 4 to move in the cylindrical groove, and thus the greater the clamping force. The pressure in the cylindrical groove can be controlled by the gas collecting component to adjust the clamping force of the hydraulic component, and the existing adjustment of the adjusting bolt and the threaded cylinder can be abandoned to avoid changes in the clamping force during use.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic element pressing force regulating device, comprising a hydraulic head (1), characterized in that: A cylindrical groove is provided at the lower end of the hydraulic head (1), a sealing block (2) is sealingly and slidingly installed in the cylindrical groove, a connecting column (3) is fixedly installed on the lower surface of the sealing block (2), a moving column (4) is fixedly installed at one end of the connecting column (3), one end of the moving column (4) passes through the cylindrical groove and is fixedly installed with a pressure plate (5), a compression spring (6) is sleeved on the moving column (4), the two ends of the compression spring (6) are fixedly connected to the pressure plate (5) and the lower end of the hydraulic head (1), respectively, and a limiting component for limiting the movement of the moving column (4) is provided in the cylindrical groove; A connecting pipe (7) communicating with the interior of the cylindrical groove is fixedly mounted on the side of the hydraulic head (1); an end of the connecting pipe (7) away from the hydraulic head (1) is fixedly connected to a rectangular cylinder (8); an upper end of the rectangular cylinder (8) is fixedly connected to an air intake pipe (9); a first one-way valve is mounted in the connecting pipe (7); a second one-way valve is mounted in the air intake pipe (9); and an air collecting assembly for collecting air into the rectangular cylinder (8) is provided in the rectangular cylinder (8).

2. A hydraulic element pressing force adjustment device according to claim 1, characterized in that: The limiting assembly comprises two stoppers (10) symmetrically fixedly mounted on the inside of the cylindrical groove, and the two stoppers (10) are located between the sealing block (2) and the movable column (4).

3. The hydraulic element pressing force regulating device according to claim 1, characterized in that: The gas collecting assembly comprises a push plate (11) sealed and slidably mounted in a rectangular cylinder (8) and a push rod (12) mounted in the rectangular cylinder (8) via an elastic component, wherein the upper end of the push rod (12) is fixedly connected to the push plate (11), and the lower end of the push rod (12) is fixedly mounted with a pull rod (13).

4. A hydraulic element pressing force adjustment device according to claim 3, characterized in that: The elastic component comprises a bracket fixedly installed in the rectangular tube (8) and a first telescopic spring (14) sleeved on the push rod (12), and the two ends of the first telescopic spring (14) are fixedly connected to the bracket and the push plate (11) respectively.

5. The hydraulic component pressing force regulating device according to claim 1, characterized in that: An L-shaped transparent tube (15) communicating with the cylindrical groove is installed on the side of the hydraulic head (1), and an indicator block (17) is installed in the transparent tube (15) in a sealing and sliding manner via a second telescopic spring (16).

6. The hydraulic element pressing force regulating device according to claim 5, characterized in that: A pressure relief pipe (18) is fixedly connected to the transparent tube (15), a sealing plug is inserted into the pressure relief pipe (18), and one end of the sealing plug is inserted into the transparent tube (15).

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