Gas jet lifting and clamping mechanism

Abstract

The utility model relates to a gas jet lifting and clamping mechanism which comprises a mounting seat and a cover body, a counter bore is formed in the top wall of the mounting seat, the counter bore is provided with an upper-stage stepped hole and a lower-stage stepped hole, the cover body is provided with a lower flange, the lower flange is matched with the upper-stage stepped hole, a piston ring is arranged in the cover body in a sliding mode, and the piston ring is provided with an edge part and a core part. The outer side wall of the edge part and the inner side wall of the lower flange are slidably connected and form air seal, the outer wall of the lower portion of the core part and the inner wall of the lower step hole are slidably connected and form air seal, a plurality of compression springs are arranged between the top wall of an inner cavity of the cover body and the top wall of the edge part, an insertion pit is formed in the upper end of the core part, and an annular unlocking notch is formed in the inner wall of the insertion pit. A through hole is formed in the top wall of the cover body and allows the zero-point blind rivet to be inserted therein. The clamping device is high in repeated positioning precision, the clamping structure of the clamping device has high transmission precision and high stability, high-precision repeated positioning and clamping can be achieved, and quick-change operation can be carried out.

Description

Technical Field

[0001] This utility model relates to the field of clamping mechanism technology, specifically to a pneumatic lifting clamping mechanism. Background Technology

[0002] The workpiece blank / fixture tray needs to be installed into the fixture on the CNC machine tool's worktable so that the CNC machine tool can process the workpiece blank. Each workpiece blank / fixture tray needs to be positioned and aligned with the fixture for processing, and is removed after processing. In the existing technology, the process of installing and removing the workpiece blank / fixture tray is cumbersome and time-consuming, which is not conducive to improving production efficiency. In addition, it is difficult to control the positioning accuracy of each workpiece blank / fixture tray when it is installed in the fixture, making it difficult to ensure the repeatability of positioning accuracy between the two. Utility Model Content

[0003] The purpose of this invention is to provide a pneumatic lifting and clamping mechanism with high repeatability and a clamping structure that has high transmission accuracy and high stability. It can achieve high-precision repeatability and clamping and can perform quick-change operations.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A pneumatic lifting and clamping mechanism includes a mounting base and a cover. The top wall of the mounting base has a countersunk hole with an upper stepped hole and a lower stepped hole. The cover has a lower flange that mates with the upper stepped hole. A piston ring is slidably mounted inside the cover. The piston ring has an edge and a core. The outer wall of the edge is slidably connected to the inner wall of the lower flange to form an air seal. The lower outer wall of the core is slidably connected to the inner wall of the lower stepped hole to form an air seal. A plurality of compression springs are provided between the top wall of the cover cavity and the top wall of the edge. The upper end of the core... The device includes an insertion pit with an annular unlocking notch on its inner wall. A perforation is located on the top wall of the cover, allowing the insertion of a zero-point pull pin. An annular locking notch is located on the side wall of the zero-point pull pin, with a locking cone at its lower end. Several steel balls are positioned between the inner wall of the insertion pit and the annular locking notch. An unlocking cavity is formed between the bottom wall of the edge and the bottom wall of the upper stepped hole. The mounting base has an unlocking air intake channel with an unlocking air intake connector at its outer end. The unlocking air intake channel communicates with the unlocking cavity. The piston ring can perform the following two movements:

[0006] Movement 1: The piston ring moves down, keeping the inner wall of the insertion pit against the steel ball, and keeping the steel ball against the locking cone surface;

[0007] Movement 2: The piston ring moves upward, allowing the steel ball to enter the annular unlocking notch, thus preventing it from pressing against the locking cone surface.

[0008] Specifically, the top wall of the edge is provided with several lower mounting holes, and the top wall of the inner cavity of the cover is provided with several upper mounting holes. The upper and lower mounting holes are arranged in a circumferential array, and the upper and lower ends of the compression spring are respectively located in the upper mounting holes and the lower mounting holes.

[0009] Specifically, a pressurization chamber is formed between the top wall of the edge and the top wall of the inner cavity of the cover. The mounting base is provided with a pressurization intake channel, and a pressurization intake connector is provided at the outer end of the pressurization intake channel. The cover is provided with a pressurization flow channel, and the pressurization intake channel and the pressurization chamber are connected through the pressurization flow channel.

[0010] Specifically, the cover is provided with a distribution channel, the top wall of the cover is provided with several air detection jet holes, the mounting base is provided with an air detection air inlet channel, the outer end of the air detection air inlet channel is provided with an air detection air inlet connector, and the air detection air inlet channel is connected to each air detection jet hole through the distribution channel.

[0011] Specifically, the bottom wall of the insertion pit is provided with a cleaning jet nozzle, the lower part of the core is provided with a cleaning flow channel, the mounting base is provided with a cleaning air intake channel, the outer end of the cleaning air intake channel is provided with a cleaning air intake connector, and the cleaning jet nozzle and the cleaning air intake channel are connected through the cleaning flow channel.

[0012] Specifically, the unlocking air intake passage and unlocking air intake connector are not located on the mounting base, but on the cover.

[0013] Specifically, the booster intake channel and booster intake connector are not located on the mounting base, but on the cover.

[0014] Specifically, the air detection inlet channel and air detection inlet connector are not located on the mounting base, but on the cover.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] Because the positioning of the zero-point pull stud and the cover perforation in this utility model is a conical hole matching positioning, the repeatability of positioning is ≤0.003mm, effectively ensuring the pass rate of product processing. After quick assembly via pneumatic clamping, the material is moved to the material preparation area for processing, and then quickly transferred to the machine tool for production processing by manual or automated robotic arms, greatly improving the machine tool's uptime and production efficiency.

[0017] This utility model's steel ball clamping structure features high transmission accuracy and high stability, enabling high-precision, repeatable positioning clamping and quick-change operations. The clamping mechanism of this utility model integrates practicality, versatility, convenience, stability, and high efficiency, significantly reducing time costs and improving production efficiency in the production process. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the pneumatic lifting and clamping mechanism of Embodiment 1;

[0020] Figure 2 This is a top view of the pneumatic lifting and clamping mechanism of Embodiment 1;

[0021] Figure 3 This is an exploded view of the pneumatic lifting and clamping mechanism of Embodiment 1;

[0022] Figure 4 for Figure 2 Sectional view of section AA in the middle;

[0023] Figure 5 for Figure 2 A sectional view of section BB in the middle;

[0024] Figure 6 for Figure 2 A sectional view of section DD in the middle section;

[0025] Figure 7 for Figure 2 Sectional view of the CC section;

[0026] Figure 8 This is a perspective view of the pneumatic lifting and clamping mechanism of Embodiment 2;

[0027] Figure 9 This is a view of the pneumatic lifting and clamping mechanism of Embodiment 2 installed on the CNC machine tool worktable.

[0028] In the picture:

[0029] 1. Mounting base; 11. Upper step hole; 12. Lower step hole; 13. Unlocking chamber; 14. Unlocking intake passage; 141. Unlocking intake connector; 15. Boost intake passage; 151. Boost intake connector; 16. Air detection intake passage; 161. Air detection intake connector; 17. Cleaning intake passage; 171. Cleaning intake connector;

[0030] 2. Compression spring;

[0031] 3. Zero-point rivet; 31. Circular locking notch; 311. Locking conical surface;

[0032] 4. Steel balls;

[0033] 5. Fine-tune the grinding ring;

[0034] 6. Cover; 61. Lower flange; 62. Pressurization channel; 63. Distribution channel; 631. Air detection jet port;

[0035] 9. Piston ring; 91. Edge; 92. Core; 921. Cleaning nozzle; 922. Cleaning flow channel; 93. Insertion pit; 931. Annular unlocking notch; 94. Pressure chamber;

[0036] 10. CNC machine tool worktable. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] Example 1

[0039] See Figures 1 to 4 A pneumatic lifting and clamping mechanism includes a mounting base 1 and a cover 6. The top wall of the mounting base 1 has a countersunk hole with an upper stepped hole 11 and a lower stepped hole 12. The cover 6 has a lower flange 61 that mates with the upper stepped hole 11. A piston ring 9 is slidably disposed inside the cover 6. The piston ring 9 has an edge portion 91 and a core portion 92. The outer side wall of the edge portion 91 is slidably connected to the inner side wall of the lower flange 61 to form an air seal. The lower outer wall of the core portion 92 is slidably connected to the inner wall of the lower stepped hole 12 to form an air seal. A plurality of compression springs 2 are disposed between the top wall of the inner cavity of the cover 6 and the top wall of the edge portion 91.

[0040] The core 92 has an insertion pit 93 at its upper end, and the inner wall of the insertion pit 93 has an annular unlocking notch 931. The top wall of the cover 6 has a through hole for inserting the zero-point pull pin 3. The side wall of the zero-point pull pin 3 has an annular locking notch 31, and the lower end of the annular locking notch 31 has a locking cone surface 311. Several steel balls 4 are arranged between the inner wall of the insertion pit 93 and the annular locking notch 31.

[0041] An unlocking cavity 13 is formed between the bottom wall of the edge 91 and the bottom wall of the upper step hole 11. The mounting base 1 is provided with an unlocking air intake channel 14, and an unlocking air intake connector 141 is provided at the outer end of the unlocking air intake channel 14. The unlocking air intake channel 14 is connected to the unlocking cavity 13.

[0042] Piston ring 9 can perform the following two movements:

[0043] Movement 1: Piston ring 9 moves downward, keeping the inner wall of insertion pit 93 against steel ball 4, and keeping steel ball 4 against locking cone surface 311 (as shown). Figure 4 (as shown);

[0044] Movement 2: The piston ring 9 moves upward (further compressing the compression spring 2), allowing the steel ball 4 to enter the annular unlocking notch 931, so that it does not abut against the locking cone surface 311.

[0045] Specifically, the top wall of the edge 91 is provided with several lower mounting holes, and the top wall of the inner cavity of the cover 6 is provided with several upper mounting holes. The upper and lower mounting holes are arranged in a circular array, and the upper and lower ends of the compression spring 2 are respectively located in the upper mounting holes and the lower mounting holes.

[0046] Specifically, in combination Figure 5 A pressurized chamber 94 is formed between the top wall of the edge 91 and the top wall of the inner cavity of the cover 6. The mounting base 1 is provided with a pressurized air intake channel 15, and a pressurized air intake connector 151 is provided at the outer end of the pressurized air intake channel 15. The cover 6 is provided with a pressurized flow channel 62, and the pressurized air intake channel 15 and the pressurized chamber 94 are connected through the pressurized flow channel 62.

[0047] Specifically, in combination Figure 6 The cover 6 is provided with a distribution channel 63, and the top wall of the cover 6 is provided with a number of air detection jet holes 631. The mounting base 1 is provided with an air detection air inlet channel 16, and the outer end of the air detection air inlet channel 16 is provided with an air detection air inlet connector 161. The air detection air inlet channel 16 is connected to each air detection jet hole 631 through the distribution channel 63.

[0048] Specifically, in combination Figure 7 The bottom wall of the insertion pit 93 is provided with a cleaning jet nozzle 921, and the lower part of the core 92 is provided with a cleaning flow channel 922. The mounting base 1 is provided with a cleaning air intake channel 17, and the outer end of the cleaning air intake channel 17 is provided with a cleaning air intake connector 171. The cleaning jet nozzle 921 and the cleaning air intake channel 17 are connected through the cleaning flow channel 922.

[0049] The working principle of Example 1 is as follows:

[0050] Mounting base 1 is fixedly installed on the CNC machine tool worktable 10 (reference) Figure 9 The lower section of the zero-point rivet 3 is detachably inserted into a through hole in the top wall of the cover 6, and the portion of the top of the zero-point rivet 3 protruding from the through hole is mounted on the bottom of the part blank / fixture tray (not shown in the figure). Under normal conditions, multiple compression springs 2 together push the edge 91 downward (see reference). Figure 4 ).

[0051] When it is necessary to insert the zero-point rivet 3 into the perforation provided on the top wall of the cover 6, refer to Figure 4First, high-pressure gas needs to be introduced into the unlocking air intake channel 14 to increase the air pressure in the unlocking chamber 13, thereby pushing the piston ring 9 upward as a whole (compressing the compression spring 2), so that the annular unlocking notch 931 moves upward to the same level as the steel ball 4. At this time, each steel ball 4 can enter the annular unlocking notch 931 without exceeding the inner wall surface of the perforation in the top wall of the cover 6, so that the zero-point pull stud 3 can be inserted into the perforation. When the high-pressure gas is stopped from being introduced into the unlocking air intake channel 14, the piston ring 9 will be pushed downward by multiple compression springs 2 to return to its original position. At this time, the inner wall of the insertion pit 93 remains against the steel ball 4, so that the steel ball 4 remains against the locking cone surface 311 (e.g., Figure 4 (as shown), thereby locking the zero-point rivet 3 into the perforation.

[0052] When it is necessary to pull out the zero-point pull pin 3, high-pressure gas is introduced into the unlocking intake passage 14 again to move the piston ring 9 upward, and then the zero-point pull pin 3 can be pulled out.

[0053] See Figure 5 When the zero-point pull pin 3 is inserted into the perforation in the top wall of the cover 6, high-pressure gas can be introduced into the pressurized intake channel 15, thereby increasing the air pressure in the pressurized chamber 94, which in turn increases the downward pressure on the piston ring 9, thus increasing the locking force. If it is necessary to pull out the zero-point pull pin 3 at this time, the air supply to the pressurized intake channel 15 must be stopped first, and then high-pressure gas must be introduced into the unlocking intake channel 14.

[0054] See Figure 6 When the zero-point rivet 3 is initially inserted into the perforation in the top wall of the cover 6 but not yet locked, high-pressure gas is introduced into the air detection inlet channel 16. The high-pressure gas will be ejected from the air detection jet hole 631, thereby blowing away the oil, dust, and slag adhering to the bottom wall of the part blank / fixture tray connected to the zero-point rivet 3, so as to enable accurate positioning in the future. When the zero-point rivet 3 is further inserted into the perforation in the top wall of the cover 6 and locked, the bottom wall of the part blank / fixture tray connected to the zero-point rivet 3 will block the air outlet of the air detection jet hole 631. At this time, the air pressure in the air detection inlet channel 16 can be detected by the digital display air pressure switch. If the air pressure increases, it indicates that the zero-point rivet 3 has been locked (the bottom wall of the part blank / fixture tray blocks the air outlet of the air detection jet hole 631). If the air pressure decreases, it indicates that the zero-point rivet 3 has not been locked.

[0055] See Figure 7 When the zero-point rivet 3 is not locked, high-pressure gas is introduced into the cleaning air intake channel 17. The gas will be ejected from the cleaning jet nozzle 921, which can wash away the iron slag and oil stains that have entered the insertion pit 93, and can also clean the oil stains and dust on the zero-point rivet 3. This ensures the repeatability and positioning accuracy of the zero-point rivet 3.

[0056] This invention also features a tray lifting function. When the unlocking action is completed, the zero-point pull pin 3 is lifted upwards by the piston ring 9, causing the part blank / clamp tray to disengage from its positioning state. This prevents the zero-point pull pin 3 from getting stuck with the cover 6, facilitating the loading and unloading of the part blank / clamp tray. This invention also includes a fine-adjustment grinding ring 5. When multiple pneumatic lifting and clamping mechanisms are used together, to ensure the consistency of the top wall height of each cover 6, the height can be guaranteed by grinding the fine-adjustment grinding ring 5. The fine-adjustment grinding ring is small in size, easy to operate, and convenient to use.

[0057] Because the positioning of the zero-point pull stud 3 and the cover 6 through the hole in this utility model is a conical hole matching positioning, the repeatability of positioning is ≤0.003mm, effectively ensuring the pass rate of product processing. After quick replacement by pneumatic clamping, it is moved to the material preparation area to be processed, and then the material is quickly changed to the machine tool for production processing by manual or automated robotic arms, which greatly improves the machine tool's uptime and production efficiency.

[0058] This utility model's steel ball clamping structure features high transmission accuracy and high stability, enabling high-precision, repeatable positioning clamping and quick-change operations. The clamping mechanism of this utility model integrates practicality, versatility, convenience, stability, and high efficiency, significantly reducing time costs and improving production efficiency in the production process.

[0059] Example 2

[0060] See Figure 8 The difference between Example 2 and Example 1 is as follows:

[0061] The unlocking air intake channel 14 and the unlocking air intake connector 141 are not located on the mounting base 1, but on the cover 6.

[0062] The booster intake channel 15 and booster intake connector 151 are not located on the mounting base 1, but on the cover 6.

[0063] The air detection inlet channel 16 and the air detection inlet connector 161 are not located on the mounting base 1, but on the cover 6.

[0064] The functional principle of the air jet lifting and clamping mechanism in Embodiment 2 is the same as that in Embodiment 1.

[0065] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pneumatic lifting and clamping mechanism, characterized in that: The device includes a mounting base and a cover. The top wall of the mounting base has a countersunk hole with an upper and a lower stepped hole. The cover has a lower flange that mates with the upper stepped hole. A piston ring is slidably mounted inside the cover. The piston ring has an edge and a core. The outer wall of the edge is slidably connected to the inner wall of the lower flange to form an airtight seal. The lower outer wall of the core is slidably connected to the inner wall of the lower stepped hole to form an airtight seal. Several compression springs are provided between the top wall of the cover's inner cavity and the top wall of the edge. An insertion recess is provided at the upper end of the core. The inner wall of the insertion pit has an annular unlocking notch, and the top wall of the cover has a perforation for inserting a zero-point pull pin. The side wall of the zero-point pull pin has an annular locking notch, and the lower end of the annular locking notch has a locking cone surface. Several steel balls are placed between the inner wall of the insertion pit and the annular locking notch. An unlocking cavity is formed between the bottom wall of the edge and the bottom wall of the upper stepped hole. The mounting base has an unlocking air intake channel, and the outer end of the unlocking air intake channel has an unlocking air intake connector. The unlocking air intake channel communicates with the unlocking cavity. The piston ring can perform the following two movements: Movement 1: The piston ring moves down, keeping the inner wall of the insertion pit against the steel ball, and keeping the steel ball against the locking cone surface; Movement 2: The piston ring moves upward, allowing the steel ball to enter the annular unlocking notch, thus preventing it from pressing against the locking cone surface.

2. The pneumatic lifting and clamping mechanism according to claim 1, characterized in that: The top wall of the edge is provided with several lower mounting holes, and the top wall of the inner cavity of the cover is provided with several upper mounting holes. The upper and lower mounting holes are arranged in a circumferential array. The upper and lower ends of the compression spring are respectively located in the upper mounting holes and the lower mounting holes.

3. The pneumatic lifting and clamping mechanism according to claim 1, characterized in that: A pressurization chamber is formed between the top wall of the edge and the top wall of the inner cavity of the cover. The mounting base is provided with a pressurization intake channel, and a pressurization intake connector is provided at the outer end of the pressurization intake channel. The cover is provided with a pressurization flow channel, and the pressurization intake channel and the pressurization chamber are connected through the pressurization flow channel.

4. The pneumatic lifting and clamping mechanism according to claim 1, characterized in that: The cover is provided with a distribution channel, and the top wall of the cover is provided with several air detection jet holes. The mounting base is provided with an air detection air inlet channel, and the outer end of the air detection air inlet channel is provided with an air detection air inlet connector. The air detection air inlet channel and each air detection jet hole are connected through the distribution channel.

5. The pneumatic lifting and clamping mechanism according to claim 1, characterized in that: The bottom wall of the insertion pit is equipped with a cleaning jet nozzle, the lower part of the core is equipped with a cleaning flow channel, the mounting base is equipped with a cleaning air intake channel, the outer end of the cleaning air intake channel is equipped with a cleaning air intake connector, and the cleaning jet nozzle and the cleaning air intake channel are connected through the cleaning flow channel.

6. The pneumatic lifting and clamping mechanism according to claim 1, characterized in that: The unlocking air intake passage and unlocking air intake connector are not located on the mounting base, but on the cover.

7. The pneumatic lifting and clamping mechanism according to claim 3, characterized in that: The booster intake channel and booster intake connector are not located on the mounting base, but on the cover.

8. The pneumatic lifting and clamping mechanism according to claim 4, characterized in that: The air detection inlet channel and air detection inlet connector are not located on the mounting base, but on the cover.

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