Multi-cylinder integrated clamp for processing inner cavity of rear cover of watch

Abstract

A multi-air-cylinder integrated clamp for machining an inner cavity of a rear cover of a watch comprises a main body, a product containing position is arranged at the top of the main body, and a plurality of side edge pushing blocks are installed in the radial direction of the clamp in a sliding mode and used for conducting profiling positioning on different positions of the peripheral side of a product. A plurality of air cylinder assemblies corresponding to the side edge push blocks are integrated in the main body, cylinder chambers of the multiple air cylinder assemblies are communicated to achieve synchronous movement, and the air cylinder assemblies are horizontally arranged at the positions below the corresponding side edge push blocks in the radial direction of the clamp. The corresponding side edge pushing blocks are driven to slide in the radial direction of the clamp so as to clamp the product in the radial direction; according to the utility model, the integrated mechanism is highly integrated, the mechanism above the clamp is simple, and no redundant bulge structure is arranged, so that the processing space above the clamp is larger, and the size is more compact; and the clamp is suitable for products of more specifications and suitable for different product shapes and differences in a larger range, and the error-tolerant rate and precision of the clamp are improved.

Description

Technical Field

[0001] This utility model relates to the field of watch engraving, and in particular to a multi-cylinder integrated fixture for processing the inner cavity of a watch case back. Background Technology

[0002] In existing technology, before CNC (Computerized Numerical Control) machining of the watch back cover, it needs to be clamped and positioned using a fixture. For example... Figure 1 The existing fixture uses a single-cylinder pressing cylinder block A. Pressing down cylinder block A drives two sets of inclined push blocks B1 and B2 to simultaneously approach their corresponding fixed blocks C1 and C2, thereby clamping the product's shape. Furthermore, the push blocks B1 and B2 have a folding structure on their end faces, which can compensate for errors in the product's shape to a certain extent. Referring to the patent with publication number CN221952778U, the drawbacks of this technology are as follows:

[0003] 1. Due to structural differences after product iteration, existing fixtures have interfering components during processing (such as...). Figure 1 (Within the dotted box) The fixture needs optimization. Furthermore, the fixture is too large; to avoid obstructing the tool, the tool clamping length must be extended, which affects tool life and machining yield.

[0004] 2. The fixture uses a single cylinder to drive two sets of push blocks B1 and B2 and fixed blocks C1 and C2 to clamp the product shape. The push blocks B1 and B2 have a folded end face structure design, which can compensate for the difference in product length and width to a certain extent, but the fault tolerance is generally low. It cannot be well adapted when the product has large differences after iteration or when the product length and width error is too large.

[0005] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a multi-cylinder integrated fixture for processing the inner cavity of a watch back cover, addressing the shortcomings of existing fixtures that are too large and have a low tolerance for error.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: a multi-cylinder integrated fixture for processing the inner cavity of a watch back cover is constructed, which includes a main body; the top of the main body is provided with a product placement position located at the center of the fixture for positioning and placing the product to be processed, and multiple side push blocks are slidably installed along the radial direction of the fixture and distributed around the product placement position for contour positioning with different positions around the product; multiple cylinder assemblies corresponding to the multiple side push blocks are integrated inside the main body, and the cylinder chambers of the multiple cylinder assemblies are connected to achieve synchronous movement; the cylinder assemblies lie horizontally below the corresponding side push blocks along the radial direction of the fixture, and drive the corresponding side push blocks to slide along the radial direction of the fixture to clamp the product in the radial direction.

[0008] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of a watch back cover according to this utility model, the side push block has an L-shaped structure, including a vertical part and a horizontal part connected to each other;

[0009] The top of the main body has a wire-cut groove rail extending radially along the fixture. The horizontal part is inserted into the wire-cut groove rail and slides in it along the radial direction of the fixture. One end of the horizontal part is a beveled inverted shape that matches the curved surface of the product. The other end of the horizontal part extends downward to wrap around the periphery of the main body to form the vertical part. The vertical part is connected to the corresponding cylinder assembly.

[0010] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of the watch back cover described in this utility model, the top of the main body is also provided with a plurality of side fixing blocks corresponding to the plurality of side push blocks. The plurality of side fixing blocks are distributed around the product placement position so that when the product is placed in the product placement position, the plurality of side fixing blocks are precisely contoured and positioned at different positions around the product. Each side fixing block and the corresponding side push block are distributed opposite each other on both sides of the product placement position.

[0011] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of the watch back cover described in this utility model, there are two side fixing blocks and two side pushing blocks. The two side pushing blocks are adjacent to each other, and the two side fixing blocks are adjacent to each other. The four side fixing blocks and the two side pushing blocks are distributed around the product placement position at a 90-degree interval.

[0012] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of the watch back cover described in this utility model, the main body has a first air passage, a second air passage, and two side chambers corresponding one-to-one with the two cylinder assemblies.

[0013] The side chamber is located below the corresponding wire-cut groove rail and extends radially to the periphery of the body, and the cylinder assembly is installed in the side chamber;

[0014] The cylinder assembly includes a piston rod, which includes a long shaft extending radially along the clamp and a disk coaxially connected to the end of the long shaft. The end of the long shaft away from the disk is connected to the side push block. The disk of the piston rod divides the side chamber into an inner cylinder chamber and an outer cylinder chamber. The first air passage is located at the center of the clamp and communicates with the inner cylinder chambers of the two side chambers and extends to the bottom of the main body to connect with an external air source. The second air passage is located in the corner area between the two side chambers and communicates with the outer cylinder chambers of the two side chambers. The second air passage also extends to the periphery of the main body to connect with an external air source.

[0015] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of a watch back cover according to the present invention, the first air passage includes a first through hole, a second through hole, and a third through hole. The first through hole and the second through hole are respectively connected to the two side chambers, and the first through hole and the second through hole intersect perpendicularly at the second through hole. The second through hole extends along the center of the fixture to the bottom of the main body and connects to an L-shaped threaded two-way connector. An L-shaped groove is formed at the bottom of the main body along the center of the fixture and below one of the side chambers. The L-shaped threaded two-way connector is disposed in the L-shaped groove.

[0016] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of the watch back cover described in this utility model, the second air passage includes a fourth straight through hole and a fifth straight through hole that are perpendicular to each other and intersect each other. The fourth straight through hole connects to one of the side chambers and extends to the periphery of the main body before being sealed by a second nut screw. The fifth straight through hole connects to the other side chamber and extends to the periphery of the main body before being connected to a threaded straight through connector.

[0017] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of the watch back cover described in this utility model, the cylinder assembly further includes a cylinder sealing plate, a cylinder guide block, a first sealing ring, a second sealing ring, and a cylinder dustproof ring.

[0018] The cylinder sealing plate is fixedly installed in the side chamber and blocks the opening of the side chamber on the periphery of the main body. The outer peripheral side wall of the cylinder sealing plate and the inner peripheral wall of the side chamber are sealed together by the first sealing ring. A guide groove for limiting the cylinder guide block is opened on the side of the cylinder sealing plate away from the center of the fixture. The cylinder guide block slides with the guide groove.

[0019] The outer peripheral wall of the piston rod disc and the inner peripheral wall of the side chamber are sealed together by the second sealing ring. The long axis of the piston rod slides through the cylinder sealing plate and is coaxially connected to the cylinder guide block. A cylinder dustproof ring is installed between the outer wall of the long axis of the piston rod and the inner wall of the cylinder sealing plate. The long axis of the piston rod slides in contact with the cylinder dustproof ring. The cylinder guide block is connected to the side push block.

[0020] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of a watch back cover according to this utility model, the side chamber includes a rectangular groove formed by a recess on the periphery of the main body and a cylindrical cavity opened within the bottom range of the rectangular groove. The cylinder sealing plate includes a rectangular body coaxially connected to match the rectangular groove and a column body matching the cylindrical cavity. An annular groove for installing the first sealing ring is opened on the outer peripheral wall of the column body. The interior of the cylinder sealing plate is unobstructed along the radial direction of the fixture and is divided into the guide groove and a long axis through hole matching the long axis of the piston rod. The guide groove is located inside the rectangular body. The cylinder dustproof ring is a T-shaped sealing ring with an internal straight through hole. A T-shaped snap-fit ​​groove matching the cylinder dustproof ring is coaxially opened in the long axis through hole.

[0021] Furthermore, in the multi-cylinder integrated fixture for processing the inner cavity of a watch back cover according to the present invention, the cylinder guide block is cylindrical, and the guide groove is a cylindrical groove that matches the cylinder guide block.

[0022] This utility model discloses a multi-cylinder integrated fixture for machining the inner cavity of a watch case back cover, which has the following advantages: The fixture integrates multiple cylinder assemblies corresponding to multiple side push blocks inside the main body. These cylinder assemblies lie horizontally below the corresponding side push blocks along the radial direction of the fixture, driving the corresponding side push blocks to slide along the radial direction of the fixture, thereby clamping the product radially. The push blocks, cylinders, and main body are highly integrated into a single mechanism, resulting in a simple upper structure without unnecessary protrusions, thus providing a larger machining space and a more compact size. Furthermore, the cylinder chambers of the multiple cylinder assemblies are connected to achieve synchronous movement, and each push block is driven by an independent cylinder assembly. Therefore, this fixture is suitable for more product specifications and can accommodate different product shapes and variations over a wider range, improving the fixture's tolerance and accuracy. Attached Figure Description

[0023] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the existing precision engraving fixture for machining the inner cavity of a watch case back;

[0025] Figure 2 This is a schematic diagram of the structure of the multi-cylinder integrated fixture for processing the inner cavity of the watch back cover according to this utility model;

[0026] Figure 3 This is an exploded view of the multi-cylinder integrated fixture for processing the inner cavity of a watch back cover according to this utility model.

[0027] Figure 4 This is a schematic diagram of the second airway;

[0028] Figure 5 yes Figure 4 A cross-sectional view of the CC position in the diagram;

[0029] Figure 6 This is a schematic diagram of the main structure;

[0030] Figure 7 This is a schematic diagram of the side push block structure;

[0031] The following are the labeling elements in the figure:

[0032] 1. Flat-head hex socket head cap screw; 2. Hex socket head cap screw; 3. Side fixing block; 4. First air passage; 5. Main body; 501. Wire-cut groove rail; 502. Slot of side fixing block; 503. Slot of placement block; 6. Piston rod; 7. Second sealing ring; 8. First sealing ring; 9. Cylinder sealing plate; 10. Side push block; 101. Vertical part; 102. Horizontal part; 11. First caliper screw; 12. Cylinder guide 13. Hex socket head cap screw; 14. Cylinder dust seal; 15. Threaded straight connector; 16. L-shaped threaded two-way connector; 17. Second nut screw; 18. Placement block; 19. Second air passage; 20. Side chamber; 401. First straight through hole; 402. Second straight through hole; 403. Third straight through hole; 191. Fourth straight through hole; 192. Fifth straight through hole; 201. Rectangular groove; 202. Cylindrical cavity. Detailed Implementation

[0033] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate typical embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. It should be understood that the embodiments of this utility model and the specific features thereof are detailed descriptions of the technical solutions of this application, and not limitations thereof. Where there is no conflict, the embodiments of this utility model and the technical features thereof can be combined with each other.

[0034] refer to Figure 2-3 This embodiment of a multi-cylinder integrated fixture for machining the inner cavity of a watch case back includes a main body 5, which is the main part of the entire fixture and connects all parts. The main body 5 is a flat rectangular body. A product placement position for positioning and placing the product to be processed is located at the center of the fixture on the top of the main body 5. Specifically, the product placement position is a placement block 18 that matches the bottom of the product. A slot 503 is formed on the upper surface of the main body 5 for positioning and placing the placement block 18. The placement block 18 is fixed in the slot 503 by multiple hexagonal socket head cap screws 2. The product is placed horizontally on the placement block 18, with the side to be processed facing upwards.

[0035] The fixture center mentioned in this article can be understood as the vertical centerline of the entire fixture, and the fixture radial direction mentioned in this article can be understood as the direction perpendicular to the fixture center and pointing towards / away from the fixture center.

[0036] The top of the main body 5 is provided with a plurality of side push blocks 10 and a plurality of side fixing blocks 3 corresponding to the side push blocks 10. The plurality of side fixing blocks 3 and the plurality of side push blocks 10 are distributed around the placement block 18, with each side fixing block 3 and its corresponding side push block 10 facing each other on both sides of the product placement position. The side fixing blocks 3 are fixedly installed on the top of the main body 5, and when the product is placed on the placement block 18, the plurality of side fixing blocks 3 are precisely contour-guided and positioned at different positions around the product. The side push blocks 10 are slidably installed on the top of the main body 5 along the radial direction of the clamp, and are used to clamp the product's periphery together with the corresponding side fixing block 3 by sliding towards it. Thus, through the synchronous sliding of the plurality of side push blocks 10, contour-guided positioning and clamping of the product at different positions around its periphery can be achieved.

[0037] Of course, it is understandable that, theoretically, the side fixing block 3 could also be replaced with the side push block 10, meaning that the product could be clamped together entirely by the side push blocks 10. However, considering the need for a simple and compact structure, in this embodiment, each side push block 10 corresponds to one side fixing block 3. Furthermore, to simplify the design as much as possible and to ensure a compact air passage for the cylinder assembly, this embodiment uses a total of two side push blocks 10 and two side fixing blocks 3. The two side push blocks 10 are adjacent to each other, and the two side fixing blocks 3 are adjacent to each other. The four side fixing blocks 3 and the two side push blocks 10 are distributed around the product placement position at a 90-degree interval. The two side fixing blocks 3 respectively limit the short side and long side of the product. To install the side push blocks 10 and the side fixing blocks 3, the top surface of the main body 5 has wire-cut grooves 501 extending radially along the clamp. The two wire-cut grooves 501 are slidably engaged with the two side push blocks 10. The top surface of the main body 5 is also provided with slots 502 for positioning and placing the side fixing blocks 3. Two slots 502 and two wire-cut grooves 501 are distributed around the placement block 18. The side fixing blocks 3 are fixed in the slots 502 by four flat-head hexagonal screws 1.

[0038] To simplify the structure at the top of the main body 5 as much as possible, in this embodiment, two cylinder assemblies corresponding to the two side push blocks 10 are integrated inside the main body 5. The cylinder assemblies are horizontally positioned below the corresponding side push blocks 10 along the radial direction of the clamp, and drive the corresponding side push blocks 10 to slide along the radial direction of the clamp to clamp the product in the radial direction.

[0039] refer to Figure 7 Specifically, the side push block 10 is generally L-shaped, including a vertical part 101 and a horizontal part 102 that are perpendicularly connected to each other. The horizontal part 102 is inserted into the wire-cut groove rail 501 in the radial direction of the fixture and slides in cooperation with it. One end of the horizontal part 102 is a beveled and inverted shape that matches the curved surface of the product. The other end of the horizontal part 102 extends downward to wrap around the body 5 to form the vertical part 101, which is connected to the corresponding cylinder assembly.

[0040] refer to Figure 6 In this embodiment, two side chambers 20, corresponding one-to-one with the two cylinder assemblies, are formed inside the main body 5. The side chambers 20 are located below the corresponding wire-cut groove rail 501 and extend radially to the periphery of the main body 5. The cylinder assemblies are installed in the side chambers 20. To ensure synchronous movement of the two cylinder assemblies, a first air passage 4 and a second air passage 19 are formed inside the main body 5. The first air passage 4 is for synchronously releasing the two cylinder assemblies, and the second air passage 19 is for synchronously clamping the two cylinder assemblies.

[0041] Specifically, the cylinder assembly includes a cylinder sealing plate 9, a cylinder guide block 12, a first sealing ring 8, a second sealing ring 7, and a PDR cylinder dust seal 14. The first sealing ring 8 is an O-ring, and the second sealing ring is a C-ring.

[0042] refer to Figure 5-6 The cylinder sealing plate 9 is fixedly installed in the side chamber 20 and seals the opening of the side chamber 20 on the periphery of the main body 5. The outer peripheral sidewall of the cylinder sealing plate 9 and the inner peripheral wall of the side chamber 20 are sealed together by the first sealing ring 8. The piston rod 6 includes a long shaft extending in the radial direction of the clamp and a disk coaxially connected to the end of the long shaft. The long shaft of the piston rod 6 slides through the cylinder sealing plate 9. The end of the long shaft of the piston rod 6 away from the disk is coaxially connected to the cylinder guide block 12. The cylinder guide block 12 is connected to the side push block 10.

[0043] Specifically, the side chamber 20 includes a rectangular groove 201 recessed on the periphery of the main body 5 and a cylindrical cavity 202 formed within the bottom of the rectangular groove 201. From an external structural perspective, the cylinder sealing plate 9 includes a rectangular body and a cylindrical body coaxially connected. The rectangular body matches the rectangular groove 201, and the cylindrical body matches the cylindrical cavity 202. The rectangular body is inserted into the rectangular groove 201, and its four corners are locked by four hexagon socket head cap screws 13. The cylindrical body is inserted into the cylindrical cavity 202, and an annular groove for installing the first sealing ring 8 is formed on the outer peripheral wall of the cylindrical body. From an internal perspective, the cylinder sealing plate 9 is open along the radial direction of the clamp and is divided into a guide groove and a long axis through hole that matches the long axis of the piston rod 6. The guide groove is located within the rectangular body and is used to restrict the cylinder guide block 12. The function of the cylinder guide block 12 is to limit the linear movement of the cylinder and prevent tilting. The cylinder guide block 12 is cylindrical, and the guide groove is a cylindrical groove that matches the cylinder guide block 12. The cylinder guide block 12 and the guide groove are in sliding fit. The end face of the cylinder guide block 12 opposite to the piston rod 6 has four threaded holes for connecting the side push block 10. The vertical part 101 of the side push block 10 is connected to the four threaded holes on the end face of the cylinder guide block 12 through four internal hexagon socket head cap screws 2. The long shaft of the piston rod 6 passes through the long shaft through hole in the cylinder sealing plate 9 and is coaxially connected to the cylinder guide block 12. The middle part of the cylinder guide block 12 has a threaded hole for connecting the piston rod 6, and the side wall has a threaded hole for installing the first nut screw 11. The first nut screw 11 fixes the piston rod 6 and the cylinder guide block 12 to prevent loosening. A cylinder dustproof ring 14 is installed between the outer wall of the long shaft of the piston rod 6 and the inner wall of the cylinder sealing plate 9. The long shaft of the piston rod 6 is in sliding contact with the cylinder dustproof ring 14. In this embodiment, the cylinder dustproof ring 14 is a T-shaped sealing ring with an internal through hole. The larger end of the cylinder dustproof ring 14 is closer to the center of the fixture than the smaller end. Therefore, a T-shaped locking groove matching the cylinder dustproof ring 14 is coaxially opened in the long shaft through hole.

[0044] The piston rod 6 is coaxially disposed within the cylindrical cavity 202, dividing the cylindrical cavity 202 of the side chamber 20 into an inner cylinder chamber and an outer cylinder chamber. The inner cylinder chamber is closer to the center of the clamp; when inflated, it pushes the piston rod 6 outward, causing the side pusher 10 to release the product. The outer cylinder chamber is farther from the center of the clamp; when inflated, it pushes the piston rod 6 inward, causing the side pusher 10 to clamp the product. The outer peripheral wall of the piston rod 6 is sealed to the inner peripheral wall of the cylindrical cavity 202 by the second sealing ring 7, and an annular groove for mounting the second sealing ring 7 is formed on the outer peripheral wall of the piston rod 6.

[0045] The first air passage 4 is located at the center of the fixture. The first air passage 4 is connected to the inner cylinder chamber of the two side chambers 20 and extends to the bottom of the main body 5 to connect with an external air source. The second air passage 19 is located in the corner area between the two side chambers 20 and is connected to the outer cylinder chamber of the two side chambers 20. The second air passage 19 also extends to the periphery of the main body 5 to connect with an external air source.

[0046] refer to Figure 5 The first air passage 4 includes a first through hole 401, a second through hole 402, and a third through hole 403. The first through hole 401 and the second through hole 402 communicate with the two side chambers 20 respectively, and the first through hole 401 and the second through hole 402 intersect perpendicularly at the second through hole 402. The second through hole 402 extends along the center of the clamp to the bottom of the main body 5 and connects to an L-shaped threaded two-way connector 16. The L-shaped threaded two-way connector 16 is used to connect to the air pipe of an external air source. An L-shaped groove is formed at the bottom of the main body 5 along the center of the clamp and below one of the side chambers 3, and the L-shaped threaded two-way connector 16 is disposed in the L-shaped groove. The radial dimensions of the first through hole 401 and the second through hole 402 are relatively small, while the radial dimension of the third through hole 403 is relatively large because it is to connect to the L-shaped threaded two-way connector 16.

[0047] refer to Figure 4 The second airway 19 includes a fourth straight through hole 191 and a fifth straight through hole 192 that are perpendicular to each other and intersect. The fourth straight through hole 191 connects to one of the side chambers 20 and extends to the periphery of the main body 5 before being sealed by a second nut screw 17. The function of the second nut screw 17 is to plug the hole and prevent air leakage. The fifth straight through hole 192 connects to the other side chamber 20 and extends to the periphery of the main body 5 before being connected to a threaded straight connector 15. The threaded straight connector 15 is used to connect to the air pipe of an external air source. Both the fourth straight through hole 191 and the fifth straight through hole 192 are stepped holes, consisting of a large hole and a small hole. The large hole connects to the threaded straight connector 15, and the small hole connects to the side chamber 20. The large holes of the fourth straight through hole 191 and the fifth straight through hole 192 intersect perpendicularly.

[0048] The operating principle of this embodiment is as follows: when the machine is vented through the stainless steel L-shaped threaded two-way connector 16 into the inner cylinder chamber of the main body 5, the air pressure pushes the two sets of piston rods 6 to move outward, causing the side push block 10 connected to the cylinder assembly to move radially outward along the clamp, thus releasing the product; conversely, when the machine is vented through the stainless steel threaded straight connector into the outer cylinder chamber of the main body 5, the air pressure pushes the two sets of piston rods 6 to move inward, causing the side push block 10 connected to the cylinder assembly to move radially inward along the clamp, thus clamping the product.

[0049] In summary, the multi-cylinder integrated fixture for machining the inner cavity of watch back covers of this utility model has the following beneficial effects: This utility model integrates multiple cylinder assemblies corresponding to multiple side push blocks inside the main body. The cylinder assemblies lie horizontally below the corresponding side push blocks along the radial direction of the fixture, driving the corresponding side push blocks to slide along the radial direction of the fixture, thereby clamping the product radially. The push blocks, cylinders, and main body are highly integrated into a single mechanism, resulting in a simple upper structure without unnecessary protrusions, thus providing a larger machining space and a more compact volume. Furthermore, the cylinder chambers of the multiple cylinder assemblies are connected to achieve synchronous movement, and each push block is driven by an independent cylinder assembly. Therefore, this fixture is suitable for more product specifications and can accommodate different product shapes and variations within a wider range, improving the fixture's fault tolerance and accuracy.

[0050] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "inner," "outer," and similar expressions used in this document are for illustrative purposes only.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0052] The terms "first," "second," and other ordinal numbers used in this specification are used to describe various constituent elements, but these constituent elements are not limited by these terms. The purpose of using these terms is solely to distinguish one constituent element from others. For example, without departing from the scope of the invention, a first constituent element may be named a second constituent element, and similarly, a second constituent element may be named a first constituent element.

[0053] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-cylinder integrated fixture for machining the inner cavity of a watch case back, characterized in that, The device includes a main body; the top of the main body is provided with a product placement position located at the center of the fixture for positioning and placing the product to be processed, and multiple side push blocks are slidably installed along the radial direction of the fixture and distributed around the product placement position for contour positioning with different positions around the product; the main body integrates multiple cylinder assemblies corresponding to the multiple side push blocks, and the cylinder chambers of the multiple cylinder assemblies are connected to achieve synchronous movement; the cylinder assemblies lie horizontally below the corresponding side push blocks along the radial direction of the fixture, and drive the corresponding side push blocks to slide along the radial direction of the fixture to clamp the product in the radial direction.

2. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 1, characterized in that, The side push block has an L-shaped structure, including a vertical part and a horizontal part that are connected to each other; The top of the main body is provided with a wire-cut groove rail extending radially along the fixture. The horizontal part is inserted into the wire-cut groove rail and slides in cooperation with it along the radial direction of the fixture. One end of the horizontal part is a beveled inverted shape that matches the curved surface of the product. The other end of the horizontal part extends downward to wrap around the periphery of the main body to form the vertical part. The vertical part is connected to the corresponding cylinder assembly.

3. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 2, characterized in that, The top of the main body is also provided with a plurality of side fixing blocks corresponding to the plurality of side push blocks. The plurality of side fixing blocks are distributed around the product placement position so that when the product is placed in the product placement position, the plurality of side fixing blocks are precisely positioned in accordance with different positions around the product. Each side fixing block and the corresponding side push block are distributed on both sides of the product placement position.

4. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 3, characterized in that, The number of side fixing blocks and side push blocks is two each. The two side push blocks are adjacent to each other, and the two side fixing blocks are adjacent to each other. The four side fixing blocks and the two side push blocks are distributed around the product placement position at a 90-degree interval.

5. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 4, characterized in that, The main body has a first air passage, a second air passage, and two side chambers corresponding to the two cylinder assemblies. The side chamber is located below the corresponding wire-cut groove rail and extends radially to the periphery of the body, and the cylinder assembly is installed in the side chamber; The cylinder assembly includes a piston rod, which includes a long shaft extending radially along the clamp and a disk coaxially connected to the end of the long shaft. The end of the long shaft away from the disk is connected to the side push block. The disk of the piston rod divides the side chamber into an inner cylinder chamber and an outer cylinder chamber. The first air passage is located at the center of the clamp and communicates with the inner cylinder chambers of the two side chambers and extends to the bottom of the main body to connect with an external air source. The second air passage is located in the corner area between the two side chambers and communicates with the outer cylinder chambers of the two side chambers. The second air passage also extends to the periphery of the main body to connect with an external air source.

6. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 5, characterized in that, The first air passage includes a first through hole, a second through hole, and a third through hole. The first through hole and the second through hole are respectively connected to the two side chambers. The first through hole and the second through hole intersect perpendicularly at the second through hole. The second through hole extends along the center of the fixture to the bottom of the main body and connects to an L-shaped threaded two-way connector. The L-shaped threaded two-way connector is used to connect to an external air source. An L-shaped groove is formed at the bottom of the main body along the center of the clamp and below one of the side chambers, and the L-shaped threaded two-way connector is disposed in the L-shaped groove.

7. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 5, characterized in that, The second air passage includes a fourth straight through hole and a fifth straight through hole that are perpendicular to each other and intersect each other. The fourth straight through hole connects to one of the side chambers and extends to the periphery of the main body before being sealed by a second nut screw. The fifth straight through hole connects to the other side chamber and extends to the periphery of the main body before being connected to a threaded straight through connector. The threaded straight through connector is used to connect to an external air source.

8. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 5, characterized in that, The cylinder assembly also includes a cylinder sealing plate, a cylinder guide block, a first sealing ring, a second sealing ring, and a cylinder dustproof ring; The cylinder sealing plate is fixedly installed in the side chamber and blocks the opening of the side chamber on the periphery of the main body. The outer peripheral side wall of the cylinder sealing plate and the inner peripheral wall of the side chamber are sealed together by the first sealing ring. A guide groove for limiting the cylinder guide block is opened on the side of the cylinder sealing plate away from the center of the fixture. The cylinder guide block slides with the guide groove. The outer peripheral wall of the piston rod disc and the inner peripheral wall of the side chamber are sealed together by the second sealing ring. The long axis of the piston rod passes through the cylinder sealing plate and is coaxially connected to the cylinder guide block. The cylinder dustproof ring is installed between the outer wall of the long axis of the piston rod and the inner wall of the cylinder sealing plate. The long axis of the piston rod and the cylinder dustproof ring are in sliding contact. The cylinder guide block is connected to the side push block.

9. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back cover according to claim 8, characterized in that, The side chamber includes a rectangular groove recessed on the periphery of the main body and a cylindrical cavity opened within the bottom of the rectangular groove. The cylinder sealing plate includes a rectangular body coaxially connected to match the rectangular groove and a column body matching the cylindrical cavity. An annular groove for installing the first sealing ring is opened on the outer peripheral wall of the column body. The interior of the cylinder sealing plate is unobstructed along the radial direction of the fixture and is divided into the guide groove and a long axis through hole matching the long axis of the piston rod. The guide groove is located inside the rectangular body. The cylinder dustproof ring is a T-shaped sealing ring with an internal straight through hole. A T-shaped snap-fit ​​groove matching the cylinder dustproof ring is coaxially opened in the long axis through hole.

10. The multi-cylinder integrated fixture for machining the inner cavity of a watch case back as described in claim 8, characterized in that, The cylinder guide block is cylindrical, and the guide groove is a cylindrical groove that matches the cylinder guide block.

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