A zero-point positioning device

Abstract

The present invention discloses a zero-point positioning device, which includes a zero-point positioning device body and a positioning pull stud (12). The zero-point positioning device body includes an upper mounting seat (1), a lower mounting seat (2), a spring limit sleeve (3), a locking sliding sleeve (5), a disc spring (4), a conical positioning ring (11), a radial spring (10), an elastic chuck (9), an ejector pin (6) and a cylindrical helical compression spring (7). The present invention provides a zero-point positioning device. The components of the device structure are all integral structures. The number of parts of the device is small, the structure is simple, and the manufacturing accuracy is easy to guarantee.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical assisted processing, and particularly relates to a zero-point positioning device. Background Art

[0002] In the process of automation in the machinery manufacturing industry, the standardization and automation of fixtures are of great importance. The design, manufacturing, installation, and replacement of fixtures consume a large amount of human resources and time, greatly restricting the development of automated production and directly affecting the production progress and processing quality of products. To solve these problems, a number of technologies have emerged. Among them, the zero-point positioning system is widely used in mechanical processing in various industries due to its advantages of high precision and simple operation. The zero-point positioning system can achieve rapid positioning and clamping between the tooling fixture and the machine tool, reducing the auxiliary time in mechanical processing. Further, the effective combination of the fixture, the machine tool, and the zero-point positioning system fixture enables enterprises to effectively achieve production automation. Currently, the zero-point positioning system fixtures used at home and abroad have problems such as low repeat positioning accuracy, complex structure, inconvenient maintenance, short service life, and no error compensation. These directly affect the smooth progress of automated production and seriously affect the economic benefits of the machinery manufacturing industry. Summary of the Invention

[0003] The present invention provides a zero-point positioning device to solve the technical problems of low repeat positioning accuracy, complex structure, inconvenient maintenance, short service life, and no error compensation.

[0004] To solve the above problems, the technical solution adopted by the present invention is:

[0005] A zero-point positioning device includes a zero-point positioning device body and a positioning pull stud. The zero-point positioning device body includes an upper mounting seat, a lower mounting seat, a spring limit sleeve, a locking sliding sleeve, a disc spring, a conical positioning ring, a radial spring, an elastic chuck, a top pin, and a cylindrical helical compression spring;

[0006] The upper mounting seat is mounted on the lower mounting seat. The spring limit sleeve is mounted on the upper part of the lower mounting seat. The locking sliding sleeve is located in the cavity of the lower mounting seat. The disc spring is mounted in the cavity of the lower mounting seat and is located on the locking sliding sleeve. The conical positioning ring is mounted on the upper mounting seat. A radial spring is mounted at the radial position of the conical positioning ring. The positioning pull stud is mounted on the top of the elastic chuck. The top pin is located below the locking sliding sleeve. The elastic chuck is mounted on the top of the locking sliding sleeve. The cylindrical helical compression spring is located below the top pin.

[0007] The upper mounting seat is a ring structure with a hollow center, provided with a first cavity, a second cavity, an annular groove, a first limiting surface, and a second limiting surface. The conical positioning ring is mounted in the first cavity.

[0008] The lower mounting base is an annular cavity structure with one end open and the other end closed. The open end is provided with a mounting port and an end face. The mounting port is provided with Thread Two. Along the surface of Thread Two, an annular cavity is provided. The center of the cavity is provided with a central column, an ejector pin mounting hole, and a third limiting surface. The bottom is also provided with a gas channel. One end of the gas channel is connected to a gas supply system. The spring limiting sleeve is connected and installed on the mounting port through Thread Two. The locking sliding sleeve is installed in the annular cavity. The ejector pin is installed in the ejector pin mounting hole. After the ejector pin is installed in the ejector pin mounting hole, a movable cavity one is formed.

[0009] The upper mounting base and the lower mounting base are fixed with cylindrical locating pins and socket head cap screws. Sealing rings are arranged between the upper mounting base and the locking sliding sleeve, between the locking sliding sleeve and the lower mounting base, and between the ejector pin and the lower mounting base.

[0010] The spring limiting sleeve is an annular structure with a hollow center, and is provided with a first limiting platform, a second limiting platform, and an external thread. The first limiting platform is in contact with the end face, and the second limiting platform is in contact with the top of the disc spring.

[0011] The locking sliding sleeve is an annular stepped shaft structure, and is provided with a sealing ring mounting groove, a first limiting step, a second limiting step, a third limiting step, a sliding cylindrical surface, a fourth cavity, a locking conical surface, and an elastic chuck mounting port. The elastic chuck is installed in the elastic chuck mounting port. The bottom of the disc spring is in contact with the first limiting step.

[0012] A third cavity is formed among the upper mounting base, the lower mounting base, the locking sliding sleeve and the spring limiting sleeve. The disc spring is installed in the third cavity.

[0013] The ejector pin is a stepped shaft structure, and is provided with a spring mounting port, a first conical positioning surface, a limiting surface and a gas flow channel. The positioning pull nail is an integral joint, with a thread at the upper end for connecting other jigs, and a positioning conical surface, a locking chamfer, a fifth cavity at the other end. One end of the fifth cavity is provided with a conical positioning cavity, and the conical positioning cavity is provided with a third conical positioning surface. The first conical positioning surface is in contact with the third conical positioning surface.

[0014] The locking sliding sleeve and the lower mounting base are installed to form a first pressure cavity, and the ejector pin and the lower mounting base are installed to form a second pressure cavity. The first pressure cavity and the second pressure cavity are communicated with the gas channel.

[0015] The elastic chuck is an annular structure, and is provided with a movable cavity two, spring pieces, an upper end face, a limiting platform. There are gaps between the spring pieces. The spring pieces are provided with a first locking surface and a second locking inclined surface. The movable cavity is installed with a positioning pull nail.

[0016] Based on the above technical solutions, the present invention has the following beneficial effects:

[0017] The quick clamping device provided by the present invention, including the upper mounting seat, lower mounting seat, locking sliding sleeve, positioning pull stud, elastic chuck, and conical positioning ring, are all designed as an integral structure. The device has fewer parts, a simple structure, and it is easy to ensure the manufacturing precision, solving the problems of the previous complex structure and inconvenient maintenance. At the same time, by using the up and down sliding of the elastic joint and the locking sliding sleeve to lock and release the positioning pull stud, the requirement of high repeat positioning is achieved, and a radial spring is installed on the outer side of the conical positioning ring to realize positioning error compensation. Description of the Drawings

[0018] Figure 1 is the top view of the quick clamping device of the present invention;

[0019] Figure 2 is the cross-sectional view of the quick clamping device of the present invention;

[0020] Figure 3 is the schematic diagram of the upper mounting seat of the quick clamping device of the present invention;

[0021] Figure 4 is the schematic diagram of the lower mounting seat of the quick clamping device of the present invention;

[0022] Figure 5 is the schematic diagram of the spring limit sleeve of the quick clamping device of the present invention;

[0023] Figure 6 is the schematic diagram of the locking sliding sleeve of the quick clamping device of the present invention;

[0024] Figure 7 is the schematic diagram of the positioning pull stud of the quick clamping device of the present invention;

[0025] Figure 8 is the schematic diagram of the elastic chuck of the quick clamping device of the present invention;

[0026] Figure 9 is the schematic diagram of the ejector pin of the quick clamping device of the present invention.

[0027] In the figure, 1 - upper mounting base, 2 - lower mounting base, 3 - spring limit sleeve, 4 - disc spring, 5 - locking sliding sleeve, 6 - ejector pin, 7 - cylindrical helical compression spring, 8 - sealing ring, 9 - elastic chuck, 10 - radial spring, 11 - conical positioning ring, 12 - positioning pull stud, 13 - third cavity, 14 - second pressure chamber, 15 - gas passage, 16 - port one, 17 - port two, 18 - first pressure chamber, 19 - sixth cavity, 20 - first cavity, 21 - second cavity, 22 - annular groove, 23 - second limiting surface, 24 - first limiting surface, 25 - central column, 26 - mounting opening, 27 - ejector pin mounting hole, 28 - third limiting surface, 29 - annular cavity, 30 - first limiting platform, 31 - external thread, 32 - second limiting platform, 33 - second limiting step, 34 - third limiting step, 35 - elastic chuck mounting opening, 36 - locking conical surface, 37 - first limiting step, 38 - fourth cavity, 39 - sealing ring mounting groove, 40 - sliding cylindrical surface, 41 - cylindrical head screw, 42 - cylindrical positioning pin, 43 - third conical positioning surface, 44 - locking chamfer, 45 - positioning conical surface, 46 - fifth cavity, 47 - thread one, 48 - conical positioning cavity, 49 - end face, 50 - spring mounting opening, 51 - first conical positioning surface, 52 - gas flow channel, 53 - limiting surface, 54 - thread two, 55 - spring piece, 56 - upper end face, 57 - limiting platform, 58 - first locking surface, 59 - second inclined locking surface, 60 - movable cavity. Detailed implementation manners

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] In the description of the present invention, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] As Figures 1-9 shown, a zero-point positioning device includes a zero-point positioning device body and a positioning pull stud 12. The zero-point positioning device body includes an upper mounting seat 1, a lower mounting seat 2, a spring limit sleeve 3, a locking sliding sleeve 5, a disc spring 4, a conical positioning ring 11, a radial spring 10, an elastic chuck 9, an ejector pin 6, and a cylindrical helical compression spring 7;

[0033] The upper mounting seat 1 is mounted on the lower mounting seat 2. The spring limit sleeve 3 is mounted on the upper part of the lower mounting seat 2. The locking sliding sleeve 5 is located in the cavity of the lower mounting seat 2. The disc spring 4 is mounted in the cavity of the lower mounting seat 2 and is located on the locking sliding sleeve 5. The conical positioning ring 11 is mounted on the upper mounting seat 1. The radial spring 10 is mounted at the radial position of the conical positioning ring 11. The positioning pull stud 12 is mounted on the top of the elastic chuck 9. The ejector pin 6 is located below the locking sliding sleeve 5. The elastic chuck 9 is mounted on the top of the locking sliding sleeve 5. The cylindrical helical compression spring 7 is located below the ejector pin 6.

[0034] The upper mounting seat 1 is an annular structure with a hollow center, provided with a first cavity 20, a second cavity 21, an annular groove 22, a first limiting surface 24, and a second limiting surface 23. The conical positioning ring 11 is mounted in the first cavity 20.

[0035] The lower mounting seat 2 is an annular cavity structure with one end open and the other end closed. The open end is provided with a mounting port 26 and an end face 49. The mounting port 26 is provided with a second thread 54. Along the second thread 54 surface, an annular cavity 29 is provided. The center of the cavity is provided with a central column 25, an ejector pin mounting hole 27, and a third limiting surface 28. The bottom is also provided with a gas channel 15. One end of the gas channel 15 is connected to a gas supply system. The spring limit sleeve 3 is connected and mounted on the mounting port 26 through the second thread 54. The locking sliding sleeve 5 is mounted in the annular cavity 29. The ejector pin 6 is mounted in the ejector pin mounting hole 27. After the ejector pin 6 and the ejector pin mounting hole 27 are mounted, a first movable cavity 19 is formed.

[0036] The upper mounting seat 1 and the lower mounting seat 2 are fixed by a cylindrical positioning pin 42 and a socket head cap screw 41. Sealing rings 8 are provided between the upper mounting seat 1 and the locking sliding sleeve 5, between the locking sliding sleeve 5 and the lower mounting seat 2, and between the ejector pin 6 and the lower mounting seat 2.

[0037] The spring limit sleeve 3 is an annular structure with a hollow center, provided with a first limiting platform 30, a second limiting platform 32, and an external thread 31. The first limiting platform 30 is in contact with the end face 49, and the second limiting platform 32 is in contact with the top of the disc spring 4.

[0038] The locking sliding sleeve 5 has an annular stepped shaft structure, and is provided with a sealing ring installation groove 39, a first limiting step 37, a second limiting step 33, a third limiting step 34, a sliding cylindrical surface 40, a fourth cavity 38, a locking conical surface 36, and an elastic chuck installation port 35. The elastic chuck 9 is installed in the elastic chuck installation port 35, and the bottom of the disc spring 4 is attached to the first limiting step 37.

[0039] A third cavity 13 is formed among the upper mounting seat 1, the lower mounting seat 2, the locking sliding sleeve 5 and the spring limiting sleeve 3, and the disc spring 4 is installed in the third cavity 13.

[0040] The ejector pin 6 has a stepped shaft structure, and is provided with a spring installation port 50, a first conical positioning surface 51, a limiting surface 53 and a gas flow channel 52. The positioning pull stud is an integral joint, with a first thread 47 at the upper end for connecting other jigs, and a positioning conical surface 45, a locking chamfer 44 and a fifth cavity 46 at the other end. One end of the fifth cavity 46 is provided with a conical positioning cavity 48, and the conical positioning cavity 48 is provided with a third conical positioning surface 43. The first conical positioning surface 51 contacts the third conical positioning surface 43.

[0041] The locking sliding sleeve 5 and the lower mounting seat 2 are installed to form a first pressure chamber 18, and the ejector pin 6 and the lower mounting seat 2 are installed to form a second pressure chamber 14. The first pressure chamber 18 and the second pressure chamber 14 are communicated with the gas channel 15.

[0042] The elastic chuck has an annular structure, and is provided with a second movable cavity 64, spring pieces 55, an upper end surface 56, a limiting platform 57. There are gaps between the spring pieces. The spring pieces are provided with a first locking surface 58 and a second locking inclined surface 59. The positioning pull stud 12 is installed in the second movable cavity 60.

[0043] Specific implementation process:

[0044] When the gas supply system supplies gas, the gas enters the first pressure chamber 18 along the gas channel 15. Under the action of the air pressure, the locking sliding sleeve 5 compresses the disc spring 4 and moves upward axially. The locking conical surface 36 of the locking sliding sleeve 5 separates from the second locking surface 59 of the elastic chuck 9. The elastic chuck 9 returns to its original state due to elastic deformation. The first locking surface 58 of the elastic chuck separates from the positioning conical surface 45 of the positioning pull stud. At the same time, the gas enters the second pressure chamber 14. As the pressure increases, the gas sprays out from the gas flow channel 52 to clean the surface of the device. At the same time, due to the elastic force of the cylindrical helical compression spring 7, the ejector pin 6 moves upward axially to eject the positioning pull stud 12, and the positioning pull stud 12 can be disassembled.

[0045] The present invention has been described in detail above in conjunction with the accompanying drawings and embodiments. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A zero-point positioning device, characterized in that, The zero-point positioning device comprises a body and a positioning pin (12), wherein the body comprises an upper mounting seat (1), a lower mounting seat (2), a spring limiting sleeve (3), a locking sleeve (5), a butterfly spring (4), a conical positioning ring (11), a radial spring (10), an elastic chuck (9), an ejector pin (6) and a cylindrical helical compression spring (7); The upper mounting seat (1) is mounted on the lower mounting seat (2), the spring limiting sleeve (3) is mounted on the upper part of the lower mounting seat (2), the locking sleeve (5) is located in the cavity of the lower mounting seat (2), the butterfly spring (4) is mounted in the cavity of the lower mounting seat (2) and is located on the locking sleeve (5), the conical positioning ring (11) is mounted on the upper mounting seat (1), a radial spring (10) is mounted in the radial position of the conical positioning ring (11), the positioning pin (12) is mounted on the top of the elastic chuck (9), the ejection pin (6) is located below the locking sleeve (5), the elastic chuck (9) is mounted on the top of the locking sleeve (5), and the cylindrical helical compression spring (7) is located below the ejection pin (6); The locking sleeve (5) is an annular step shaft structure, provided with a sealing ring mounting groove (39), a first limiting step (37), a second limiting step (33), a third limiting step (34), a sliding cylindrical surface (40), a fourth cavity (38), a locking conical surface (36), and an elastic chuck mounting opening (35). The elastic chuck (9) is mounted on the elastic chuck mounting opening (35), and the bottom of the butterfly spring (4) is in contact with the first limiting step (37). The ejector pin (6) is a stepped shaft structure, provided with a spring mounting opening (50), a first conical positioning surface (51), a limiting surface (53) and a gas flow channel (52); the positioning rivet is an integral joint, with a thread (47) provided on the upper end for connecting to other fixtures, and a positioning conical surface (45), a locking chamfer (44) and a fifth cavity (46) provided on the other end; one end of the fifth cavity (46) is provided with a conical positioning cavity (48), and the conical positioning cavity (48) is provided with a third conical positioning surface (43); the first conical positioning surface (51) contacts the third conical positioning surface (43), and the positioning conical surface (45) cooperates with the conical positioning ring (11) for positioning; The locking sleeve (5) and the lower mounting seat (2) are installed to form a first pressure chamber (18), and the ejector pin (6) and the lower mounting seat (2) are installed to form a second pressure chamber (14), and the first pressure chamber (18) and the second pressure chamber (14) are in communication with the gas channel (15); The elastic chuck is an annular structure, provided with a second movable cavity (64), a spring sheet (55), an upper end surface (56), and a limit platform (57). Gaps are left between the spring sheets. A first locking surface (58) and a second locking inclined surface (59) are provided on the spring sheet. The second movable cavity (60) is installed with a positioning pin (12).

2. A zero-point positioning device according to claim 1, characterized in that, The upper mounting base (1) is an annular structure with a hollow center, and is provided with a first cavity (20), a second cavity (21), an annular groove (22), a first limiting surface (24), and a second limiting surface (23). The conical positioning ring (11) is installed in the first cavity (20).

3. A zero-point positioning device according to claim 1, characterized in that, The lower mounting base (2) is an annular cavity structure with one end open and the other end closed. The open end is provided with a mounting opening (26) and an end face (49). The mounting opening (26) is provided with a second thread (54). An annular cavity (29) is provided along the surface of the second thread (54). A central column (25), an ejector pin mounting hole (27), and a third limiting surface (28) are provided at the center of the cavity. A gas passage (15) is further provided at the bottom. One end of the gas passage (15) is connected to a gas supply system. The spring limiting sleeve (3) is connected and installed on the mounting opening (26) through the second thread (54). The locking sliding sleeve (5) is installed in the annular cavity (29). The ejector pin (6) is installed in the ejector pin mounting hole (27). After the ejector pin (6) is installed in the ejector pin mounting hole (27), a first movable cavity (19) is formed.

4. A zero-point positioning device according to claim 1, characterized in that, The upper mounting base (1) and the lower mounting base (2) are fixed by a cylindrical positioning pin (42) and a socket head cap screw (41). Sealing rings (8) are provided between the upper mounting base (1) and the locking sliding sleeve (5), between the locking sliding sleeve (5) and the lower mounting base (2), and between the ejector pin (6) and the lower mounting base (2).

5. A zero-point positioning device according to claim 1, characterized in that, The spring limiting sleeve (3) is an annular structure with a hollow center, and is provided with a first limiting platform (30), a second limiting platform (32), and an external thread (31). The first limiting platform (30) is in contact with the end face (49), and the second limiting platform (32) is in contact with the top of the disc spring (4).

6. A zero-point positioning device according to claim 1, characterized in that A third cavity (13) is formed among the upper mounting base (1), the lower mounting base (2), the locking sliding sleeve (5), and the spring limiting sleeve (3). The disc spring (4) is installed in the third cavity (13).

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