Hydraulic holding device applied to falling type impact table

Abstract

The invention discloses a hydraulic clasping device applied to a falling type impact table, which comprises an impact table top, two table top guide columns are fixedly connected to two sides of the impact table top, the two table top guide columns and the impact table top are vertically guided, a clasping structure is arranged in the lower part of the impact table top, and the clasping structure comprises a table top oil way diverging block II and a band-type brake piston; an O-shaped sealing ring is installed on the band-type brake piston, a piston cavity is formed in the second table top oil way branching block, and the band-type brake piston is installed in the piston cavity. According to the hydraulic clasping device applied to the drop type impact table, through the oil way design in the table top oil way diverging block II, the flow direction of hydraulic oil is guided by punching the interior of a steel material, it is guaranteed that the hydraulic oil flows in steel, the defects caused by the reactive force of the hydraulic oil in a similar flange structure are overcome, and the service life of the hydraulic clasping device is prolonged. And the plug design of the oil outlet can help the hydraulic holding device to discharge air in the oil cavity before working, and performance reduction of the hydraulic holding device and damage to parts can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental testing equipment, and specifically to a hydraulic clamping device applied to a drop impact table. Background Art

[0002] The drop impact table is mainly used in the field of metrological calibration, especially for the metrology and calibration of objects under the impact of half-sine wave, post-peak sawtooth wave, and trapezoidal wave; based on its application field, it is required that the drop impact table has the characteristics that the peak lateral movement ratio of the table impact acceleration and the non-uniformity of the peak table impact acceleration reach the standards and are stable.

[0003] The currently commonly used clamping structures of impact tables are the split flange and the brake piston, or only the brake piston, and the two methods of designing a hydraulic oil chamber inside the impact tabletop. The first split flange and brake piston clamping structure is to design an oil passage by opening holes inside the flange, so that hydraulic oil can flow from the flange into the hydraulic oil chamber between the flange and the brake piston, thereby pushing the brake piston to clamp the impact tabletop. Although this method is convenient for replacing the brake piston and the sealing ring, the sealing performance cannot be guaranteed. When the hydraulic oil pushes the brake piston to clamp the impact tabletop, there will also be a reaction force acting on the flange, resulting in oil leakage; the second method of using a hydraulic oil chamber designed inside the impact tabletop to push the brake piston to clamp the impact tabletop eliminates the flange and improves the sealing performance, but it also leads to a huge workload for maintenance and replacement of seals. The entire impact tabletop needs to be removed before replacement, which is extremely cumbersome.

[0004] To solve the above problems, this case was born. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a hydraulic clamping device applied to a drop impact table, which solves the problems raised in the above background art.

[0007] (2) Technical Solutions

[0008] To achieve the above objectives, the present invention is realized through the following technical solutions: A hydraulic clamping device applied to a drop impact table includes an impact tabletop. Two tabletop guide columns are fixedly connected to both sides of the impact tabletop, and the two tabletop guide columns are perpendicular to the impact tabletop for guiding. A clamping structure is arranged inside the impact tabletop below. The clamping structure includes a tabletop oil passage branch block two and a brake piston. An O-ring seal is installed on the brake piston. A piston cavity is opened on the tabletop oil passage branch block two, and the brake piston is installed in the piston cavity.

[0009] Preferably, a hydraulic hard pipe is provided inside the impact tabletop. A transition joint is connected to the end of the hydraulic hard pipe. An oil inlet is also provided on the tabletop oil circuit manifold block two. The other end of the hydraulic hard pipe is connected to the oil inlet.

[0010] Preferably, a passage is provided on the tabletop oil circuit manifold block two. The passage is connected to the oil inlet. A piston chamber oil inlet is also provided on the tabletop oil circuit manifold block two. The piston chamber oil inlet is connected to the piston chamber.

[0011] Preferably, an oil outlet is provided at the end of the passage inside the tabletop oil circuit manifold block two. A plug is connected to the oil outlet. The plug penetrates the side wall of the tabletop oil circuit manifold block two.

[0012] Preferably, a clamping structure is connected between the brake piston and the impact tabletop. The clamping structure includes a guide post slot, a pulling-out thread, a cylindrical top block, and an O-ring slot. The guide post slot is clamped on the tabletop guide post.

[0013] Preferably, the guide post slot is arc-shaped. The arc of the guide post slot fits the shape of the tabletop guide post. A pulling-out thread is provided on the guide post slot.

[0014] Preferably, a cylindrical top block is provided at the end of the guide post slot. O-ring slots are provided on both sides of the guide post slot.

[0015] (III) Beneficial effects

[0016] After adopting the above technical solutions, compared with the prior art, the present invention has the following advantages:

[0017] 1. For the hydraulic clamping device applied to the drop impact table of the present invention, the oil circuit design in the tabletop oil circuit manifold block two manufactures the flow path of the hydraulic oil by drilling holes inside the steel material, ensuring the flow of the hydraulic oil inside the steel and avoiding the disadvantages caused by the reaction force of the hydraulic oil in similar flange structures, thus improving the sealing performance.

[0018] 2. For the hydraulic clamping device applied to the drop impact table of the present invention, the plug design of the oil outlet in the tabletop oil circuit manifold block two can help the hydraulic clamping device discharge the air in the oil cavity before working, avoiding the performance degradation and component damage of the hydraulic clamping device.

[0019] 3. A hydraulic clamping device applied to a drop impact table according to the present invention. The guide post slot with an arc surface design helps to increase the contact surface with the table guide post. At the same time, it can also slide automatically under the action of hydraulic oil to adjust the arc surface direction, ensuring the maximum contact area. Meanwhile, the hydraulic oil cavity formed by the cylindrical top block effectively increases the contact area of the hydraulic oil, preventing the occurrence of jamming. And the precise slot design for a specific O-ring can effectively prevent oil leakage during the movement of the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic cross-sectional view of the impact table surface of the present invention;

[0021] Figure 2 It is a schematic front view of the impact table surface of the present invention;

[0022] Figure 3 It is a schematic side view of the impact table surface of the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the table manifold oil block of the present invention;

[0024] Figure 5 It is a schematic view of the table manifold oil block of the present invention;

[0025] Figure 6 It is a schematic cross-sectional view of the clamping structure of the present invention;

[0026] Figure 7 It is a schematic view of the clamping structure of the present invention.

[0027] In the figure: 1. Table oil path manifold block two; 2. Table guide post; 3. Brake piston; 4. O-ring; 5. Hydraulic hard pipe; 6. Impact table surface; 7. Adapter; 8. Plug; 9. Oil inlet; 10. Piston cavity; 11. Piston cavity oil inlet; 12. Oil outlet; 13. Guide post slot; 14. Pull-out thread; 15. Cylindrical top block; 16. O-ring slot. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0029] As Figure 1-7Shown: A hydraulic clamping device applied to a drop impact table, including an impact tabletop 6. On both sides of the impact tabletop 6, two tabletop guide columns 2 are fixedly connected. The two tabletop guide columns 2 are vertically guided with respect to the impact tabletop 6. The tabletop guide columns 2 are used to guide the impact tabletop 6 in the vertical direction and provide vertical friction during the clamping process of the brake piston 3. Inside the lower part of the impact tabletop 6, a clamping structure is provided. The clamping structure includes a tabletop oil circuit manifold block two 1 and a brake piston 3. An O-ring 4 is installed on the brake piston 3. A piston cavity 10 is provided on the tabletop oil circuit manifold block two 1. The brake piston 3 is installed in the piston cavity 10. The tabletop oil circuit manifold block two 1 is used to deliver hydraulic oil through a hydraulic hard pipe 5 to an adapter 7 and then to an oil inlet 9, and then introduce the hydraulic oil from the oil inlet 9 into a piston cavity oil inlet 11 and then into the piston cavity 10, thereby pushing the brake piston 3 to apply a horizontal pressure to the tabletop guide column 2 to generate a vertical friction force to clamp the impact tabletop 6. Therefore, the tabletop oil circuit manifold block two 1 plays a role in guiding the hydraulic oil. At the same time, it can also relieve pressure and discharge air through the plug 8 of the oil outlet 12, making the clamping device more reliable.

[0030] After the brake piston 3 uses the impact tabletop 6 to rise to a specified height, the brake piston 3 is pushed by hydraulic pressure to apply a horizontal pressure to the tabletop guide column 2, generating a vertical friction force to make the impact tabletop 6 clamp and stay at the specified height, and also clamp during the process of the impact tabletop 6 bouncing up after free fall to prevent it from falling again and generating multiple impacts, avoiding affecting the impact waveform. Among them, the arc-shaped guide column slot 12 increases the contact surface between the brake piston 3 and the impact tabletop 6, effectively increasing the friction force and reliability between the brake piston 3 and the impact tabletop 6. The extraction thread 14 is used to screw the thread of the extractor into it when replacing, so as to drive the extractor and pull it out from the tabletop oil circuit manifold block two 1. The cylindrical top block 15 is used to prevent the brake piston 3 from being in close contact with the tabletop oil circuit manifold block two 1, resulting in too small a contact area between the hydraulic oil and the back surface of the brake piston 3. The cylindrical top block 15 can create a hydraulic oil cavity, effectively increasing the contact area between the hydraulic oil and the cylindrical top block 15 and ensuring the clamping reliability. The O-ring slot is used to install the O-ring, playing a role in sealing the hydraulic oil cavity and preventing oil leakage.

[0031] When using this drop impact table, when the impact tabletop 6 reaches the specified height, the tabletop oil circuit manifold block two 1 introduces the hydraulic oil from the oil inlet 9 into the piston cavity oil inlet 11 and then into the piston cavity 10, thereby pushing the brake piston 3 to apply a horizontal pressure to the tabletop guide column 2, generating a vertical friction force to clamp the impact tabletop. During this process, since the oil circuit is completed inside the tabletop oil circuit manifold block two 1, when receiving the reaction force of the brake piston 3, it will not cause the oil circuit and the oil cavity to separate, resulting in pressure leakage and the phenomenon of being unable to clamp the impact tabletop.

[0032] When reaching the specified height, the O-ring seal on the brake piston 3 can ensure the sealing of the oil chamber during the process of the brake piston 3 clamping. To avoid pressure leakage, before the impact table 6 freely drops, the "brake time" will be input into the control program. Starting from when the brake piston 3 releases and the impact table 6 freely drops, when reaching the instant of the input "brake time", the program will issue a "brake" command to the hydraulic system. After the impact table 6 rebounds, the brake piston 3 will clamp the impact table 6 under the action of the hydraulic system to prevent the influence of secondary impact on the waveform.

[0033] A hydraulic hard pipe 5 is provided inside the impact table 6. The end of the so-called hydraulic hard pipe 5 is connected with a transition joint 6. An oil inlet 9 is also opened on the table oil circuit manifold block two 1. The other end of the hydraulic hard pipe 5 is connected with the oil inlet 9.

[0034] A passage is opened on the table oil circuit manifold block two 1. The passage is connected with the oil inlet 9. A piston chamber oil inlet 11 is also opened on the table oil circuit manifold block two 1. The piston chamber oil inlet 11 is connected with the piston chamber 10.

[0035] An oil outlet 12 is opened at the end of the passage inside the table oil circuit manifold block two 1. A plug 8 is connected to the oil outlet 12. The plug 8 passes through the side wall of the table oil circuit manifold block two 1.

[0036] A clamping structure is connected between the brake piston 3 and the impact table 6. The clamping structure includes a guide post slot 13, a pulling-out thread 14, a cylindrical top block 15, and an O-ring seal slot 16. The guide post slot 13 is clamped on the table guide post 2. With the overall design method of the brake piston 3 and the oil circuit, after combining the brake piston 3 and the O-ring seal completely, it is then installed into the piston chamber 10 in the table oil circuit manifold block two 1. This design not only ensures the integrity of the oil circuit and the oil chamber, making the reaction force generated by the pressure inside the table oil circuit manifold block two 1, but also facilitates the disassembly and maintenance of the hydraulic clamping device.

[0037] The guide post slot 13 is arc-shaped. The arc of the guide post slot 13 fits the shape of the table guide post 2. A pulling-out thread 14 is opened on the guide post slot 13.

[0038] A cylindrical top block 15 is provided at the end of the guide post slot 13. O-ring seal slots 16 are opened on both sides of the guide post slot 13.

[0039] Based on the above embodiments as inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the idea of this invention. The technical scope of this utility model is not limited to the content in the specification, and its protection scope must be determined according to the scope of the claims.

Claims

1. A hydraulic clamping device applied to a drop impact table, comprising an impact table surface (6), characterized in that: On both sides of the impact tabletop (6), two tabletop guide columns (2) are fixedly connected. The two tabletop guide columns (2) are vertically guided with respect to the impact tabletop (6). Inside the impact tabletop (6) at the lower part, a clamping structure is provided. The clamping structure includes a tabletop oil circuit manifold block two (1) and a brake piston (3). An O-ring seal (4) is installed on the brake piston (3). A piston cavity (10) is opened on the tabletop oil circuit manifold block two (1), and the brake piston (3) is installed in the piston cavity (10).

2. The hydraulic clamping device applied to a drop impact table according to claim 1, wherein: A hydraulic hard pipe (5) is provided inside the impact tabletop (6). The end of the hydraulic hard pipe (5) is connected with a transition joint (6). An oil inlet (9) is also opened on the tabletop oil circuit manifold block two (1), and the other end of the hydraulic hard pipe (5) is connected with the oil inlet (9).

3. The hydraulic clamping device applied to a drop impact table according to claim 2, wherein: A passage is opened on the tabletop oil circuit manifold block two (1). The passage is connected with the oil inlet (9). A piston cavity oil inlet (11) is also opened on the tabletop oil circuit manifold block two (1), and the piston cavity oil inlet (11) is connected with the piston cavity (10).

4. The hydraulic clamping device applied to a drop impact table according to claim 3, characterized in that: An oil outlet (12) is opened at the end of the passage inside the tabletop oil circuit manifold block two (1). A plug (8) is connected to the oil outlet (12), and the plug (8) penetrates through the side wall of the tabletop oil circuit manifold block two (1).

5. The hydraulic clamping device applied to a drop impact table according to claim 1, characterized in that: A clamping structure is connected between the brake piston (3) and the impact tabletop (6). The clamping structure includes a guide column clamping groove (13), a pulling-out thread (14), a cylindrical top block (15), and an O-ring seal clamping groove (16). The guide column clamping groove (13) is clamped on the tabletop guide column (2).

6. The hydraulic clamping device applied to a drop impact table according to claim 5, characterized in that: The guide column clamping groove (13) is arc-shaped. The arc of the guide column clamping groove (13) fits the shape of the tabletop guide column (2). A pulling-out thread (14) is opened on the guide column clamping groove (13).

7. The hydraulic clamping device applied to a drop impact table according to claim 6, characterized in that: A cylindrical top block (15) is provided at the end of the guide column clamping groove (13). O-ring seal clamping grooves (16) are opened on both sides of the guide column clamping groove (13).

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