A negative pressure adsorption clamp for hollow disc-shaped parts

Abstract

A negative pressure adsorption clamp for hollow disc-shaped parts includes a top block portion connected to a top block cavity portion, which in turn is connected to a middle cavity portion. A transmission plug portion is located inside the middle cavity portion, with its bottom end extending out of the middle cavity portion and into a bottom cavity portion. An outer sleeve portion is provided outside the bottom cavity portion, the middle cavity portion, and the top block cavity portion. This invention uses negative pressure adsorption to achieve rapid clamping of the workpiece, while simultaneously using a hemispherical top block to center-position the workpiece, thereby reducing inspection costs and improving inspection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of disc-type parts testing technology, and in particular to a negative pressure adsorption clamp for hollow disc-type parts. Background Technology

[0002] Currently, when inspecting hollow disc-shaped parts, they are often fixed by using a mandrel for positioning and bolt expansion and tightening, such as the patent application entitled "A Soft Mandrel Fixture" (publication number: CN218575019U). This clamping method requires selecting a suitable expansion sleeve according to the size of the center hole, which is difficult to handle clamping parts of different sizes in the same batch. In addition, the tightening of bolts during the clamping process makes the process relatively cumbersome and reduces the inspection efficiency. Summary of the Invention

[0003] To overcome the shortcomings of the existing fixtures, the purpose of this utility model is to provide a negative pressure adsorption clamp for hollow disc-shaped parts. It uses negative pressure adsorption to quickly clamp the workpiece, and at the same time, it uses a hemispherical top block to center the workpiece, which can reduce inspection costs and improve inspection efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A negative pressure adsorption clamp for hollow disc-shaped parts includes a top block portion 1, which is connected to a top block cavity portion 2. The top block cavity portion 2 is connected to a middle cavity portion 3. A transmission plug portion 4 is provided inside the middle cavity portion 3. The bottom end of the transmission plug portion 4 extends out of the middle cavity portion 3 and into a bottom cavity portion 5. An outer sleeve portion 6 is provided outside the bottom cavity portion 5, the middle cavity portion 3, and the top block cavity portion 2.

[0006] The top block portion 1 includes a top block 11, a first sealing ring groove 111 is machined on the outer side of the bottom of the top block 11 and a first sealing ring 12 is installed thereon, and the top block portion 1 is installed in the top block cavity portion 2.

[0007] The bottom of the top block cavity 2 is machined with a first air guide hole 21. The top block cavity 2 is in contact with the middle cavity 3, and airtightness is achieved through the second sealing ring 32 and the third sealing ring 33.

[0008] The central cavity portion 3 includes a central cavity 31, with a second connecting hole 311 at its center. A venting groove 313 is provided between the inner and outer rings of the central cavity 31. The bottom of the inner ring is connected to the venting groove 313 through multiple second venting holes 312. The venting groove 313 is connected to the first venting hole 21 of the top block cavity portion 2. A second sealing ring groove 314 is provided at the top of the inner ring and a second sealing ring 33 is installed thereon. A third sealing ring groove 315 is provided at the top of the outer ring and a third sealing ring 34 is installed thereon. A fourth sealing ring mounting groove 316 is provided at the second connecting hole 311 and a fourth sealing ring 32 is installed thereon. The transmission plug portion 4 is connected to the central cavity portion 3 through the second connecting hole 311 and achieves airtightness through the corresponding sealing ring. The central cavity portion 3 is installed inside the outer sleeve portion 6 and contacts the bottom cavity portion 5.

[0009] The transmission plug part 4 includes a first push plate 41 and a second push plate 42 connected by a transmission plug 43. The first push plate 41 has a fifth sealing ring groove 412 on its side and a fifth sealing ring 45 is installed thereon. The first push plate 41 and the fifth sealing ring 45 are placed in the bottom cavity part 5. The second push plate 42 has a sixth sealing ring groove 422 on its side and a sixth sealing ring 44 is installed thereon. The second push plate 42 and the sixth sealing ring 44 are placed in the middle cavity part 3. The first push plate 41 has a first threaded hole 411 at its center, the second push plate 42 has a second threaded hole 421 at its center, and the transmission plug 43 has threaded posts 431 at both ends. The threaded posts 431 at both ends of the transmission plug 43 are threaded to the first threaded hole 411 and the second threaded hole 421.

[0010] The bottom cavity portion 5 includes a bottom cavity 51, with a third connecting hole 511 at the center of the bottom cavity 51. The third connecting hole 511 has a seventh sealing ring groove 512 inside and a seventh sealing ring 52 is installed therein. The bottom outer side of the bottom cavity 51 has an eighth sealing ring groove 513 and an eighth sealing ring 53 is installed therein. The bottom cavity portion 5 is installed inside the outer sleeve portion 6 and contacts the bottom of the outer sleeve portion 6. The transmission plug portion 4 is connected to the bottom cavity portion 5 through the third connecting hole 511, and airtightness is achieved through the seventh sealing ring 52 and the eighth sealing ring 53.

[0011] The outer sleeve portion 6 includes an outer sleeve 61, with multiple air channels 611 machined on the inner wall of the outer sleeve 61. An air hole 612 connecting to the external gas environment is provided on the outer side of the outer sleeve 61. A platform 613 is machined on the top of the outer sleeve, and an adsorption air channel 614 is machined on the platform 613. The air hole 612, air channels 611 and adsorption air channel 614 form a gas passage. A ninth sealing ring groove 615 is provided on the inner side of the top of the outer sleeve 61, and a ninth sealing ring 62 is installed thereon. The top block cavity portion 2 is connected to the outer sleeve 61 by threads and through the ninth sealing ring 62.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention achieves workpiece positioning through a central block lifting mechanism and clamping through negative pressure adsorption. Simultaneously, its structure allows positioning and clamping to be completed in a single air extraction operation. This solves the problems of cumbersome clamping processes and limited workpiece adaptability in current hollow disc-type part measurement and clamping methods. This invention simplifies the clamping process, increases automation, improves testing efficiency, and reduces labor and material consumption, thus saving costs. The device is highly adaptable, simple in structure, easy to maintain, and highly efficient, significantly optimizing the clamping steps in the testing of hollow disc-type parts. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the structure of this utility model.

[0015] Figure 2 This is an assembly diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the top block portion of this utility model.

[0017] Figure 4 This is a schematic diagram of the top block cavity of this utility model.

[0018] Figure 5 This is a cross-sectional view of the central cavity of this utility model.

[0019] Figure 6 This is a schematic diagram of the structure of the central cavity portion of this utility model.

[0020] Figure 7 This is a schematic diagram of the transmission plug part of this utility model.

[0021] Figure 8 This is a schematic diagram of the lower cavity portion of this utility model.

[0022] Figure 9 This is a schematic diagram of the structure of the outer sleeve portion of this utility model.

[0023] Figure 10 This is a schematic diagram of the internal gas environment of this utility model.

[0024] The components are: 1. Top block portion, 2. Top block cavity portion, 3. Middle cavity portion, 4. Transmission plug portion, 5. Bottom cavity portion, 6. Outer sleeve portion, 11. Top block, 111. First sealing ring groove, 12. First sealing ring, 21. First air guide hole, 31. Middle cavity, 32. Fourth sealing ring, 33. Second sealing ring, 34. Third sealing ring, 311. Second connecting hole, 312. Second air guide hole, 313. Air guide groove, 314. Second sealing ring groove, 315. Third sealing ring groove, 316. Fourth sealing ring groove, 41. First push plate, 42. Second push plate, 412. Fifth... 422 Sixth sealing ring groove, 43 Transmission plug, 44 Sixth sealing ring, 45 Fifth sealing ring, 51 Bottom cavity, 52 Seventh sealing ring, 53 Eighth sealing ring, 511 Third connecting hole, 512 Seventh sealing ring groove, 513 Eighth sealing ring groove, 61 Outer sleeve, 62 Ninth sealing ring, 611 Air passage, 612 Air hole, 613 Placement platform, 614 Adsorption air passage, 615 Ninth sealing ring groove, 71 Top block cavity gas environment, 72 Middle cavity gas environment, 73 Bottom cavity gas environment, 74 External gas environment. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Reference Figure 1 , Figure 2 A negative pressure adsorption clamp for hollow disc-shaped parts includes a top block portion 1, which is connected to a top block cavity portion 2. The top block cavity portion 2 is connected to a middle cavity portion 3. A transmission plug portion 4 is provided inside the middle cavity portion 3. The bottom end of the transmission plug portion 4 extends out of the middle cavity portion 3 and into a bottom cavity portion 5. An outer sleeve portion 6 is provided outside the bottom cavity portion 5, the middle cavity portion 3, and the top block cavity portion 2.

[0027] Reference Figure 3 The top block portion 1 includes a top block 11. The bottom outer side of the top block 11 is provided with a first sealing ring groove 111 and is airtight by installing a first sealing ring 12 and is installed in the top block cavity portion 2.

[0028] Reference Figure 4 The bottom of the top block cavity 2 is machined with an air guide hole 21. The top block cavity 2 is in contact with the middle cavity 3, and airtightness is achieved through a sealing ring.

[0029] Reference Figure 5 , Figure 6The central cavity portion 3 includes a central cavity 31, with a second connecting hole 311 at its center. An air guide groove 313 is provided between the inner and outer rings of the central cavity 31. The bottom of the inner ring is connected to the air guide groove 313 via four air guide holes 312. The air guide groove 313 is connected to the air guide hole 21 of the top block cavity portion 2. A second sealing ring groove 314 is provided at the top of the inner ring, and a second sealing ring 33 is installed during assembly. A third sealing ring groove 315 is provided at the top of the outer ring, and a third sealing ring 34 is installed during assembly. A fourth sealing ring groove 316 is provided at the second connecting hole 311, and a fourth sealing ring 32 is installed during assembly. The transmission plug portion 4 is connected to the central cavity portion 3 via the second connecting hole 311, and airtightness is achieved by adding corresponding sealing rings. The central cavity portion 3 is installed inside the outer sleeve portion 6 and contacts the bottom cavity portion 5.

[0030] Reference Figure 7 The transmission plug part 4 includes a first push plate 41 and a second push plate 42 connected by a transmission plug 43. The first push plate 41 has a fifth sealing ring groove 412 on its side and is sealed by a fifth sealing ring 45. The first push plate 41 and the fifth sealing ring 45 are placed in the bottom cavity part 5. The second push plate 42 has a sixth sealing ring groove 422 on its side and is sealed by a sixth sealing ring 44. The second push plate 42 and the fourth sealing ring 44 are placed in the middle cavity part 3. The first push plate 41 has a first threaded hole 411 at its center, the second push plate 42 has a second threaded hole 421 at its center, and the transmission plug 43 has threaded posts 431 at both ends. The threaded posts 431 at both ends of the transmission plug 43 are threadedly connected to the first threaded hole 411 and the second threaded hole 421.

[0031] Reference Figure 8 The bottom cavity portion 5 includes a bottom cavity 51, with a third connecting hole 511 at the center of the bottom cavity 51. A seventh sealing ring groove 512 is machined inside the third connecting hole 511 and a seventh sealing ring 52 is installed therein. An eighth sealing ring groove 513 is machined on the outer side of the bottom of the bottom cavity 51 and an eighth sealing ring 53 is installed therein. The bottom cavity portion 5 is installed inside the outer sleeve portion 6 and contacts the bottom of the outer sleeve portion 6. The transmission plug portion 4 is connected to the bottom cavity portion 5 through the third connecting hole 511, and airtightness is achieved through the seventh sealing ring 52 and the eighth sealing ring 53.

[0032] Reference Figure 9The outer sleeve portion 6 includes an outer sleeve 61, with four air channels 611 machined on the inner wall of the outer sleeve 61. An air hole 612 connecting to the external gas environment is provided on the outer side of the outer sleeve 61. A platform 613 is machined on the top of the outer sleeve, and an adsorption air channel 614 is machined on the platform 613. The air hole 612, air channels 611 and adsorption air channel 614 form a gas passage. A ninth sealing ring groove 615 is provided on the inner side of the top of the outer sleeve 61 and a ninth sealing ring 62 is installed. The top block cavity portion 2 is connected to the outer sleeve 61 by threads and through the eighth sealing ring 62.

[0033] The working principle of this utility model is as follows:

[0034] During assembly, firstly, install the sixth sealing ring 44 and the fifth sealing ring 45 into the sixth sealing ring groove 422 on the second push plate 42 and the fifth sealing ring groove 412 on the first push plate 41, respectively. Then, install the seventh sealing ring 52 into the seventh sealing ring groove 512 within the third connecting hole 511 on the bottom cavity 51. Next, install the eighth sealing ring 53 into the eighth sealing ring groove 513 on the bottom cavity 51. Place the push plate 41 with the sealing rings installed into the bottom cavity 51. Then, pass the transmission plunger 43 through the third connecting hole 511 and fix it to the first push plate 41 via a threaded connection. Next, install the fourth sealing ring 32 into the fourth sealing ring groove 316 within the second connecting hole 311 on the middle cavity 31. Finally, pass the transmission plunger 43 through the connecting hole 316 on the middle cavity 31... The second connecting hole 311 is then inserted into the middle cavity portion 3, and the second push plate 42 is connected and fixed to the transmission plug 43 by threads. The second sealing ring 33 and the third sealing ring 34 are installed in the second sealing ring groove 314 and the third sealing ring groove 315 of the middle cavity 31. The already installed bottom cavity portion 5, transmission plug portion 4, and middle cavity portion 3 are installed into the outer sleeve 61, with the bottom cavity 5 at the bottom. The ninth sealing ring 62 is installed in the ninth sealing ring groove 615 on the outer sleeve 61. The top block cavity portion 2 is installed in the outer sleeve 61. The first sealing ring 12 is installed in the first sealing ring groove 111 on the top block 11 by threaded connection with the outer sleeve 6. The top block portion 1 is installed in the top block cavity 2 to complete the assembly.

[0035] Reference Figure 10 The vent 612 is used to connect the bottom cavity gas environment 73 inside the bottom cavity part 5 with the external gas environment 74. When the pressure of the external gas environment 74 decreases, the gas in the bottom cavity gas environment 73 is extracted through the vent 612.

[0036] The air passage 611 is used to connect the bottom cavity gas environment 73 inside the bottom cavity part 5 with the adsorption air passage 614 on the outer sleeve 61. When the pressure of the bottom cavity gas environment 73 decreases, the gas inside the adsorption air passage 614 is drawn away through the air passage 611. When the hollow disk-type part is placed on the stage 613 of the outer sleeve 61, the adsorption air passage 614 will form a negative pressure, so that the part is adsorbed on the stage 613.

[0037] The first push plate 41 and the fifth sealing ring 45 are placed in the bottom cavity portion 5, together forming the bottom cavity gas environment 73. When the pressure of the bottom cavity gas environment 73 decreases, the first push plate 41 drives the transmission plug portion 3 to move downward.

[0038] The second push plate 42 and the fourth sealing ring 44 are placed in the middle cavity part 3, together forming the middle cavity gas environment 72. When the transmission plug part 4 moves downward, it will drive the second push plate 42 to move, making the pressure of the middle cavity gas environment 72 increase.

[0039] When the pressure of the gas environment 72 in the middle cavity increases, the gas enters the gas guide groove 313 through the gas guide hole 312, and then enters the gas environment 71 in the top block cavity 2 through the gas guide hole 21 on the top block cavity 2.

[0040] The top block cavity 2 and the top block 1 together form the top block cavity gas environment 71. When gas enters the top block cavity gas environment 71 through the gas guide hole 21, the pressure of the top block cavity gas environment 71 increases, thereby pushing the top block 1 to move upward.

[0041] The top block part 1 consists of a top block 11 with a hemispherical top and a cylindrical bottom, and a first sealing ring groove 111 and a first sealing ring 12. The hemispherical structure of the top block 11 lifts the hollow disc-like part to position it.

[0042] This embodiment can reduce clamping steps, improve detection efficiency, adapt to changes in the size of the clamped parts to a certain extent, reduce clamping costs, and the device has a simple structure and is easy to assemble.

Claims

1. A negative pressure adsorption clamp for hollow disc-shaped parts, characterized in that: It includes a top block part (1), which is connected to the top block cavity part (2). The top block cavity part (2) is connected to the middle cavity part (3). The middle cavity part (3) is provided with a transmission plug part (4). The bottom end of the transmission plug part (4) extends out of the middle cavity part (3) and into the bottom cavity part (5). The bottom cavity part (5), the middle cavity part (3), and the top block cavity part (2) are provided with an outer sleeve part (6).

2. The negative pressure adsorption clamp for hollow disc-shaped parts according to claim 1, characterized in that: The top block portion (1) includes a top block (11), the bottom outer side of the top block (11) is provided with a first sealing ring groove (111) and a first sealing ring (12) is installed thereon, and the bottom of the top block (11) is installed in the top block cavity portion (2) via the first sealing ring (12).

3. The negative pressure adsorption clamp for hollow disc-shaped parts according to claim 1, characterized in that: The top block cavity (2) has a first air guide hole (21) machined at the bottom. The top block cavity (2) is in contact with the middle cavity (3) and is airtight through the second sealing ring (33) and the third sealing ring (34).

4. The negative pressure adsorption clamp for hollow disc-shaped parts according to claim 3, characterized in that: The middle cavity part (3) includes a middle cavity (31), a second connecting hole (311) is provided in the center of the middle cavity (31), an air guide groove (313) is provided between the inner and outer rings of the middle cavity (31), the bottom of the inner ring is connected to the air guide groove (313) through multiple second air guide holes (312), the air guide groove (313) is connected to the first air guide hole (21) of the top block cavity part (2); the top of the inner ring is provided with a second sealing ring groove (314) and a second sealing ring (33) is installed, the top of the outer ring is provided with a third sealing ring groove (315) and a third sealing ring (34) is installed, the second connecting hole (311) is provided with a fourth sealing ring groove (316) and a fourth sealing ring (32) is installed; the transmission plug part (4) is connected to the middle cavity part (3) through the second connecting hole (311), and airtightness is achieved through the corresponding sealing ring, the middle cavity part (3) is installed in the outer sleeve part (6) and contacts the bottom cavity part (5).

5. The negative pressure adsorption clamp for hollow disc-shaped parts according to claim 1, characterized in that: The transmission plug part (4) includes a first push plate (41) and a second push plate (42) connected by a transmission plug (43). The first push plate (41) has a fifth sealing ring groove (412) on its side and a fifth sealing ring (45) is installed thereon. The first push plate (41) and the fifth sealing ring (45) are placed in the bottom cavity part (5). The second push plate (42) has a sixth sealing ring groove (422) on its side and a sixth sealing ring (44) is installed thereon. The second push plate (42) and the sixth sealing ring (44) are placed in the middle cavity part (3). The first push plate (41) has a first threaded hole (411) at its center and the second push plate (42) has a second threaded hole (421) at its center. The transmission plug (43) has threaded posts (431) at both ends. The threaded posts (431) at both ends of the transmission plug (43) are threadedly connected to the first threaded hole (411) and the second threaded hole (421).

6. The negative pressure adsorption clamp for hollow disc-shaped parts according to claim 1, characterized in that: The bottom cavity part (5) includes a bottom cavity (51), a third connecting hole (511) is provided in the center of the bottom cavity (51), a seventh sealing ring groove (512) is provided inside the third connecting hole (511) and a seventh sealing ring (52) is installed therein, and an eighth sealing ring groove (513) is provided on the outer side of the bottom of the bottom cavity (51) and an eighth sealing ring (53) is installed therein; the bottom cavity part (5) is installed inside the outer sleeve part (6) and contacts the bottom of the outer sleeve part (6), and the transmission plug part (4) is connected to the bottom cavity part (5) through the third connecting hole (511), and airtightness is achieved through the seventh sealing ring (52) and the eighth sealing ring (53).

7. A negative pressure adsorption clamp for hollow disc-shaped parts according to claim 1, characterized in that: The outer sleeve (6) includes an outer sleeve (61), with multiple air channels (611) machined on the inner wall of the outer sleeve (61), and an air hole (612) connected to the external gas environment on the outer side of the outer sleeve (61). A platform (613) is machined on the top of the outer sleeve, and an adsorption air channel (614) is machined on the platform (613). The air hole (612), the air channel (611) and the adsorption air channel (614) form a gas passage. A ninth sealing ring groove (615) is provided on the inner side of the top of the outer sleeve (61) and a ninth sealing ring (62) is installed thereon. The top block cavity (2) is connected to the outer sleeve (61) by threads and through the ninth sealing ring (62).

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