Double-mechanism linked inner support pressing clamp for processing profiling surface of rear cover of watch

Abstract

A double-mechanism linkage inner supporting and pressing clamp for machining a profiling face of a rear cover of a watch comprises a main body, a product containing block, a piston rod, a piston, a wedge head supporting rod, an inner supporting hand and a pressing block, an air cylinder chamber is arranged at the bottom of the main body, and the piston and a piston part of the piston rod are vertically arranged in the air cylinder chamber in a spaced mode so that the air cylinder chamber can be divided into three air chambers. The wedge head supporting rod is inserted into the air cylinder chamber in a sliding and sealing mode to be connected with the piston, the multiple inner supporting hands are installed on the main body in a sliding mode in different radial directions, and the multiple inner supporting hands make contact with the wedge head inclined face of the top of the wedge head supporting rod at the same time so as to be opened along with upward movement of the wedge head supporting rod to clamp the inner side wall of the watch rear cover; in this way, the clamp can trigger radial horizontal movement and axial vertical movement at the same time, linkage of inner supporting and pressing is achieved, the clamping force of the inner supporting and pressing is not affected, the inner supporting and pressing are driven by the air cylinders, the clamping force of the clamp on products is more reliable, and the clamping phenomenon is avoided; in addition, the two air cylinder mechanisms are combined to share one air chamber, so that the clamp is more compact.

Description

Technical Field

[0001] The invention relates to the field of watch processing, in particular to a double-mechanism linked inner support and pressing clamp for processing a contoured surface of a watch back cover. Background Art

[0002] In the prior art, before the back cover of a watch is processed by CNC (Computerized Numerical Control), the back cover of the watch needs to be clamped and positioned using a fixture. The existing fixture adopts the solution of positioning the inner cavity of the product by profiling and locking the screws with a cover plate. Locking the screws and clamping are inconvenient for employees to operate, which increases the clamping time. It may also cause product fracturing due to improper operation by employees, adding many uncontrollable factors. The inner cavity profiling positioning of the product cannot be fully adapted to the positioning of the fixture, and there is a positioning gap or interference. The gap will cause the risk of horizontal displacement of the product, and the interference will cause the product to not fit into the inner cavity of the back cover of the watch. In order to solve the above problems, the applicant has designed an internal support and pressing clamp, with reference to the document with publication number CN118848589 A. This clamp utilizes a support rod to move downward through multiple internal support hands, and during the downward movement, the multiple internal support hands are radially spread outward until they are interference fit with different positions of the inner wall of the watch back cover, and then continue to move downward to pull the pressure block to press the top of the watch back cover. In this way, no manual clamping and positioning is required, and the horizontal and vertical degrees of freedom can be restricted at the same time. However, when the solution was put into production and use in the later stage, it was found that the clamping force of the solution was insufficient, and the clamping reliability needed to be optimized. In addition, the machining and assembly accuracy of the clamp were extremely high. If the machining and assembly were not in place, the middle support rod might get stuck and could not be pulled down due to uneven or excessive force during internal support, resulting in a problem of false pressure on the product. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a double-mechanism linked inner support and downward pressing clamp for processing the contoured surface of a watch back cover in view of the above-mentioned defect of unreliable clamping in the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a double-mechanism linkage inner support and pressing fixture for processing the contoured surface of the back cover of a watch, which includes a main body, a product placement block arranged on the top of the main body for positioning and placing the back cover of the watch, a piston rod, a piston, a wedge support rod, a plurality of inner support hands extending into the product placement block along the radial direction of the fixture, and a pressing block;

[0005] A cylinder chamber is arranged at the bottom of the main body, and the piston and the piston part of the piston rod are arranged in the cylinder chamber in a vertically separated manner, so that the cylinder chamber is divided into three air chambers. When the air chamber in the middle is inhaled, the piston is driven to move upward and the piston rod is driven to move downward synchronously;

[0006] The wedge support rod is inserted into the cylinder chamber and connected to the piston by sliding and sealing along the axial direction of the clamp, and a plurality of inner support hands are slidably installed on the main body along different radial directions of the clamp, and a plurality of inner support hands are simultaneously in contact with the top wedge inclined surface of the wedge support rod, so as to be stretched open as the wedge support rod moves upward, thereby clamping the inner side wall of the back cover of the watch;

[0007] The rod portion of the piston rod is inserted into the wedge head support rod along the axial sliding seal of the clamp and passes through the product placement block. The pressure block is located above the product placement block and connected to the rod portion of the piston rod to press the watch back cover as the piston rod moves downward.

[0008] Furthermore, in the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the present invention, the top wedge of the wedge support rod includes a plurality of T-shaped inclined surface bosses distributed around the central axis of the wedge support rod, and the T-shaped inclined surface bosses extend obliquely and gradually move away from the center of the wedge support rod from top to bottom;

[0009] The inner supporter comprises a sliding block, which is slidably mounted on the main body along the radial direction of the clamp, and a slanted T-slot which slidably cooperates with the T-shaped slanted boss is arranged on the side of the sliding block facing the central axis of the wedge head support rod.

[0010] Furthermore, in the dual-mechanism-linked inner support and pressing clamp for processing the contoured surface of the watch back cover described in the present invention, a piston rod avoidance hole is opened up and down at the center of the product placement block to avoid the rod portion of the piston rod, and a plurality of notches are also opened around the center of the product placement block, corresponding to the plurality of inner support hands one by one, and the notches are located at positions corresponding to the corners of the watch back cover, and the inner support hands are hidden in the notches along the radial direction of the clamp.

[0011] Furthermore, in the dual-mechanism-linked inner support and pressing clamp for processing the contoured surface of the watch back cover described in the present invention, the product placement block includes a circle of support steps for placing the watch back cover and an inner cavity positioning protrusion that cooperates with the inner cavity gap of the watch back cover, the support steps surround and are lower than the inner cavity positioning protrusion, the center of the inner cavity positioning protrusion passes through the piston rod avoidance hole, and the notch passes through the support steps in the radial direction and extends into the corner of the inner cavity positioning protrusion.

[0012] Further, in the double-mechanism-linked inner support pressing fixture for processing the contoured surface of the back cover of a watch described in the present invention, the inner support hand comprises an inner support block;

[0013] The inner support block is L-shaped, and includes a horizontal fixing portion and a vertical inner support portion. The horizontal fixing portion is fixed to the top of the slider and hidden in the notch of the support step, and the vertical inner support portion is hidden in the notch of the corner of the inner cavity positioning protrusion. The side of the vertical inner support portion facing away from the center of the product placement block is a contoured contact surface that contours the inner side wall of the watch back cover.

[0014] Furthermore, the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to the present invention further includes a fixing member;

[0015] The bottom end of the wedge head support rod is threadedly connected to the fixing piece, and the wedge head support rod is reduced in diameter near the bottom end to form a circle of limiting step surface. The piston is coaxially sleeved outside the wedge head support rod and is clamped up and down by the limiting step surface and the fixing piece.

[0016] Furthermore, in the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the present invention, the pressing block includes a cylinder pressing block and a product pressing block in contoured contact with the top of the back cover of the watch, and the cylinder pressing block is rotatably mounted on the top of the rod portion of the piston rod.

[0017] The product pressing block is provided with a placement groove, and a window which passes through from top to bottom is provided at the bottom of the placement groove. The rod portion of the piston rod passes through the window. The cylinder pressing block is placed in the placement groove and can rotate in the placement groove. The shape and size of the window enable the cylinder pressing block to pass through the window unimpeded only when it is rotated to a suitable angle.

[0018] Furthermore, in the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the present invention, the inner side wall of the cylinder chamber protrudes in the radial direction of the fixture to form an annular gear, the piston and the piston parts of the piston rod are arranged above and below the annular gear, and the inner diameter of the annular gear is smaller than the outer diameter of the piston and the piston rod;

[0019] The inner wall of the cylinder chamber is connected to the first air vent near the annular gear position, the inner wall of the cylinder chamber is connected to the second air vent near the upper edge, and the inner wall of the cylinder chamber is connected to the third air vent near the lower edge. The first air hole, the second air hole, and the third air hole are respectively connected to external air sources to realize air intake control of the three air chambers.

[0020] Furthermore, in the double-mechanism linkage inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the present invention, it also includes a cylinder body and a bottom plate, the cylinder body is installed on the top of the bottom plate and a sealing ring is arranged between the contact surfaces of the two, the main body is installed on the top of the cylinder body and a sealing ring is arranged between the contact surfaces of the two, and the main body, the cylinder body and the bottom plate are enclosed together to form the cylinder chamber;

[0021] The cylinder body is hollow inside and penetrates from top to bottom, the opening at the top of the cylinder body protrudes in the radial direction of the fixture to form the annular gear position, and the bottom plate blocks the opening at the bottom of the cylinder body;

[0022] The first vent hole includes an upper vent groove formed on the upper end surface of the cylinder body, a lower vent hole extending downward from the bottom of the upper vent groove, and a first connecting hole formed on the side wall of the cylinder body and directly connected to the lower vent hole;

[0023] The second vent hole comprises a horizontal vent hole and a second connecting hole which are directly connected to the main body along the radial direction of the clamp, the horizontal vent hole is directly connected to the topmost air chamber, and the second connecting hole is opened on the side wall of the cylinder body;

[0024] The third vent hole includes a lower vent groove formed on the lower end surface of the cylinder body, an upper vent hole extending upward from the bottom of the lower vent groove, and a third connecting hole formed on the side wall of the cylinder body and directly connected to the upper vent hole.

[0025] Furthermore, in the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the present invention, a wedge head avoidance slot hole is provided at the top of the main body, and the top wedge head of the wedge head support rod is located in the wedge head avoidance slot hole and can move up and down therein; a plurality of guide rail grooves extending in the radial direction of the fixture and the same number as the plurality of sliders are provided at the top of the main body, and the plurality of guide rail grooves intersect at the wedge head avoidance slot hole, and the slider is inserted into the guide rail groove along the radial direction of the fixture to slide and cooperate therewith;

[0026] The top of the cylinder chamber is provided with a mounting through hole connected with the wedge head avoidance slot, the wedge head support rod passes through the mounting through hole, and the mounting through hole is provided with an annular groove for mounting a sealing ring, so as to play a sealing role when the wedge head support rod moves up and down; the circumferential side wall of the piston is provided with an annular groove for mounting a sealing ring, so as to play a sealing role when the wedge head support rod slides;

[0027] The wedge head support rod has a central hole that passes through the upper and lower parts and matches the rod portion of the piston rod. The rod portion of the piston rod slides through the central hole of the wedge head support rod. The rod portion of the piston rod or the central hole of the wedge head support rod is provided with an annular groove for installing a sealing ring, so as to seal when the wedge head support rod and the piston rod move relative to each other; the circumferential side wall of the piston portion of the piston rod is provided with an annular groove for assembling a sealing ring, which is used to seal when the piston portion of the piston rod slides.

[0028] The double-mechanism-linked inner support and pressing clamp for processing the contoured surface of the back cover of a watch of the present invention has the following beneficial effects: the present invention arranges piston rods and pistons in the cylinder chamber up and down to divide it into three air chambers, and the middle air chamber is shared by the piston rod and the piston. When air is introduced into the cylinder chamber, the piston moves up and synchronously drives the piston rod to move down. Since the wedge head support rod sliding seal is inserted into the cylinder chamber and connected with the piston, multiple inner support hands are slidably installed on the main body along different radial directions. Multiple inner support hands are in contact with the top wedge head inclined surface of the wedge head support rod at the same time, so they can be stretched open as the wedge head support rod moves up to clamp the inner side wall of the back cover of the watch, and at the same time, the rod portion of the piston rod is slidingly sealed and sleeved in the wedge head support rod and passes through the product placement block to engage with the pressure block located above the product placement block. The watch back cover is connected, so it can press the watch back cover as the piston rod moves downward, so the clamp can trigger radial horizontal movement and axial vertical movement at the same time, the horizontal inner support can limit the horizontal freedom of the product, and the downward pressure can limit the vertical freedom of the product. Compared with the prior art, the inner wall of the watch back cover is first supported internally during the downward movement, and then the pressure block is pulled downward to press the top of the watch back cover, the present invention can realize the linkage of inner support and downward pressure without affecting their respective clamping forces, and both of them are driven by cylinders, so the clamping force of the product of the present invention is more reliable, and there will be no jamming phenomenon; moreover, because the two cylinder mechanisms are combined to share one air chamber, the air path and pipelines can be simplified, the spatial structure of the clamp is saved, and the clamp is made more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0030] Figure 1 It is a schematic diagram of an application scenario of the double-mechanism-linked inner support and downward pressing fixture for processing the contoured surface of the back cover of a watch according to the present invention;

[0031] Figure 2 It is a component exploded view of the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to the present invention;

[0032] Figure 3 It is an exploded view of the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to the present invention;

[0033] Figure 4 It is a cross-sectional view of the double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to the present invention;

[0034] Figure 5 It is a schematic diagram of the matching relationship between the wedge head support rod and the slider;

[0035] Figure 6 It is a schematic diagram of the coordination relationship between the product placement block and the support block;

[0036] Figure 7 It is a schematic diagram of the rotation of the pressing block;

[0037] Figure 8 It is a schematic diagram of a three-way gas circuit;

[0038] Fig. 9 It is a schematic diagram of the vent;

[0039] Among them, the reference numerals in the figure are:

[0040] 100, product; 201, fixture assembly; 202, inner support assembly; 203, pressing assembly; 204, fixture base assembly; 300, first air pipe; 400, second air pipe; 500, third air pipe;

[0041] 1. Plug screw; 2. Cylinder block; 3. Product block; 4. Hexagon socket screw; 5. Product placement block; 6. Inner support block; 7. Pin; 8. Wedge support rod; 9. Slider; 10. Stainless steel joint; 11. Main body; 12. Piston; 13. C-type sealing ring; 14. O-type sealing ring; 15. Fixing part; 16. Piston rod; 17. O-type sealing ring; 18. O-type sealing ring, 19. Cylinder body, 20. Bottom plate ; 21. Hexagon socket screw; 22. Pin; 23. Hexagon socket screw; 24. Four-axis base; 101. Guide rail groove; 801. T-shaped boss; 901. T-shaped slot; 301. Window; 201. Ear; 501. Piston rod avoidance hole; 502. Notch; 51. Inner cavity positioning protrusion; 52 Support step; 191. Annular gear position; H1. First vent; H2. Second vent; H3 is the third vent. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Typical embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0043] refer to Figure 1The top of the inner support and pressing fixture 200 of the present invention is used to place the watch back cover to be processed, that is, the product 100 mentioned in this article. The fixture 200 is connected to the external air source through the first air pipe 300, the second air pipe 400, and the third air pipe 500. The air source enters from the first air pipe 300, and the inner support and pressing fixture 200 internally supports and presses the product 100. The air source enters from the second air pipe 400 and the third air pipe 500, and the inner support and pressing fixture 200 is reset to release the product 100.

[0044] refer to Figure 2 The internal support and pressing clamp 200 is classified from top to bottom according to different functions, and is roughly divided into a clamp tooling assembly 201, an internal support assembly 202, a pressing assembly 203 and a clamp base assembly 204. The clamp tooling assembly 201 is a component for clamping products, and plays a role in positioning and fixing. The internal support assembly 202 is an actuator, which is used to realize horizontal movement in four radial directions. The pressing assembly 203 is an actuator, which is used to realize the vertical pressing action in the axial direction of the clamp. The clamp base assembly 204 is used to carry the clamp and the components connecting the machine turntable.

[0045] refer to Figure 3-4 The fixture tooling assembly 201 mainly includes a product placement block 5, an inner support block 6, and a pressure block for positioning the watch back cover. The inner support assembly 202 mainly includes a main body 1, a piston 12, a wedge head support rod 8, and a slider 9. The downward pressing assembly 203 mainly includes a piston rod 16.

[0046] The axial direction of the clamp mentioned in this article refers to the direction of the center line of the product 100, which is also the direction of the center line of the clamp, the direction in which the lower pressure block presses down, and the vertical or perpendicular direction; the radial direction of the clamp refers to the direction perpendicular to the axial direction of the clamp and pointing to the center line of the product 100. The horizontal direction in this article is parallel to the radial direction of the clamp. In the present invention, the central axis of the piston rod 16 and the central axis of the wedge head support rod 8 both coincide with the center line of the product.

[0047] The product placement block 5 is disposed on the top of the main body 1 for positioning and placing the product 100. The cylinder chamber is at the bottom of the main body 1. The main body 1 and the cylinder body 19 are fixed up and down, and the two are enclosed to form the cylinder chamber. The piston 12 and the piston part of the piston rod 16 are separated up and down and disposed in the cylinder chamber, thereby dividing the cylinder chamber into three air chambers. When the air chamber in the middle is inhaled, the piston 12 is driven to move up and the piston rod 16 is driven to move down synchronously.

[0048] The inner support block 6 and the slider 9 constitute an inner support hand. Of course, in other embodiments, the inner support block 6 and the slider 9 can be an integral inner support hand. The inner support hand extends into the product placement block 5 along the radial direction of the clamp, specifically, the inner support block 6 of the inner support hand extends into the product placement block 5. The wedge head support rod 8 is slidingly and sealedly inserted into the cylinder chamber and connected to the piston 12. A plurality of the inner support hands are slidingly installed on the main body 1 along different radial directions of the clamp. A plurality of the inner support hands are in contact with the top wedge head inclined surface of the wedge head support rod 8 at the same time, so as to be stretched open as the wedge head support rod 8 moves upward, thereby clamping the inner side wall of the back cover of the watch.

[0049] The rod portion sliding seal of the piston rod 16 is inserted into the wedge head support rod 8 and passes through the product placement block 5. The pressure block is located above the product placement block 5 and connected to the rod portion of the piston rod 16 to press the watch back cover as the piston rod 16 moves downward.

[0050] In other words, the present invention is equivalent to two sets of cylinder mechanisms driving the horizontal internal support and vertical downward pressure of the product respectively, and the two actions can be synchronized but do not affect each other. Compared with the prior art that first supports the inner wall of the watch back cover during the downward movement, and then continues to move downward to pull the pressure block to press the top of the watch back cover, the present invention has a more reliable clamping force on the product and will not cause jamming. Moreover, because the two cylinder mechanisms are combined to share one air chamber, the air path and pipelines can be simplified, saving the fixture space structure and making the fixture more compact.

[0051] Each component is described in more detail below.

[0052] The fixture tooling assembly 201 mainly includes a plug screw 1, a cylinder pressure block 2, a product pressure block 3, a hexagon socket screw 4, a product placement block 5, and an inner support block 6. The inner support assembly 202 mainly includes a pin 7, a wedge support rod 8, a slider 9, a stainless steel joint 10, a main body 11, a piston 12, a C-type sealing ring 13, an O-type sealing ring 14, and a fixing part 15. The pressing assembly 203 mainly includes a piston rod 16, an O-type sealing ring 17, a pin 7, a C-type sealing ring 13, an O-type sealing ring 18, a cylinder body 19, and a stainless steel joint 10. The fixture base assembly 204 mainly includes an O-type sealing ring 18, a bridge plate 20, a hexagon socket screw 21, a pin 22, a hexagon socket screw 23, and a four-axis base 24.

[0053] In this embodiment, the main body 1 is substantially cylindrical, but its appearance and shape are not actually limited. Figure 5The top of the main body 1 is provided with a plurality of guide grooves 101, which are the same in number as the plurality of sliders 9. The guide grooves 101 extend along the radial direction of the fixture and penetrate through the side wall of the main body 11. The plurality of guide grooves 101 intersect and communicate at the center of the main body 1. The slider 9 is inserted into the guide groove 101 along the radial direction of the fixture and slides with it, thereby realizing the linear motion of the slider 9. In this embodiment, a total of four sliders 9 are designed, so there are also four guide grooves 101, and the adjacent guide grooves 101 are spaced 90° from each other.

[0054] A wedge avoidance slot is also provided at the top center of the main body 1 to avoid the top wedge of the wedge support rod 8. The top wedge of the wedge support rod 8 is located in the wedge avoidance slot and can move up and down therein. A plurality of guide rail grooves 101 intersect at the wedge avoidance slot. The top wedge of the wedge support rod 8 maintains an inclined sliding contact with the slider 9, and the inclined direction is gradually away from the central axis of the wedge support rod 8 from top to bottom, so that the up and down sliding can be converted into horizontal reciprocating motion, specifically, the upward movement of the top wedge of the wedge support rod 8 can be converted into the radial outward movement of the slider 9, and the downward movement of the top wedge of the wedge support rod 8 can be converted into the radial inward movement of the slider 9.

[0055] refer to Figure 5 Specifically, the circumference of the top wedge of the wedge support rod 8 includes four T-shaped inclined surface bosses 801 distributed around the center of the wedge support rod 8. The T-shaped inclined surface bosses 801 extend obliquely and gradually move away from the center of the wedge support rod 8 from top to bottom. The cross section of the T-shaped inclined surface bosses 801 is T-shaped, and the cross section refers to the cross section perpendicular to the extension direction of the T-shaped inclined surface bosses 801. The slider 9 is slidably installed on the main body 1 along the radial direction. The side of the slider 9 facing the central axis of the wedge support rod 8 is provided with an inclined surface T-slot 901 that slidably cooperates with the T-shaped inclined surface bosses 801, so as to prevent the T-shaped inclined surface bosses 801 from escaping from the inclined surface T-slot 901 and only allow the T-shaped inclined surface bosses 801 to slide in the inclined surface T-slot 901.

[0056] The main part of the wedge support rod 8 is a cylindrical rod, the top of the cylindrical rod is connected to the wedge, the radial dimension of the wedge in the clamp is larger than the radial dimension of the cylindrical rod, and the wedge is slidably matched with the slider 9. The top of the cylinder chamber is provided with a mounting through hole connected to the wedge avoidance slot, the cylindrical rod of the wedge support rod 8 passes through the mounting through hole, the bottom end of the cylindrical rod extends into the uppermost air chamber, and the bottom end of the cylindrical rod is threadedly connected with the fixing member 15. The piston 12 is disc-shaped and has a central hole extending through the upper and lower parts. The part of the bottom end of the wedge support rod 8 that passes through the central hole of the piston 12 is reduced in diameter near the bottom end of the wedge support rod 8 to form a ring-shaped limiting step surface. The piston 12 is coaxially sleeved outside the wedge support rod 8 and is clamped up and down by the limiting step surface and the fixing member 15, so that the connection between the piston 12 and the wedge support rod 8 can be realized, and the piston 12 and the wedge support rod 8 are connected to form a piston rod. Specifically, the fixing member 15 is a fixing nut with an internal thread. The section between the bottom end surface of the wedge head support rod 8 and the limiting step surface is provided with an external thread. The outer diameter of the fixing member 15 is larger than the inner diameter of the piston 12, and the outer diameter of the limiting step surface is larger than the inner diameter of the hole in the piston 12.

[0057] The main body 1 is installed on the top of the cylinder body 19, and the cylinder body 19 is installed on the top of the bottom plate 20, and the bottom plate 20 is specifically a bridge plate. In this embodiment, a plurality of pins 21 are specifically used to insert the cylinder body 19 from the bottom of the bottom plate until they are screwed into the main body 1, so as to connect the main body 1, the cylinder body 19, and the bottom plate 20 together. One side of the bottom plate 20 is connected side by side with the four-axis base 24 through the hexagon socket screw 23, and the four-axis base 24 is used to install the turntable. A groove is provided on either side of the contact surface of the main body 1 and the cylinder body 19 to set an O-ring 18, or a groove is provided on both sides to set an O-ring 18, and a groove is provided on either side of the contact surface of the cylinder body 19 and the bottom plate 20 to set an O-ring 18, or a groove is provided on both sides to set an O-ring 18, and the main body 1, the cylinder body 19, and the bottom plate 20 are enclosed together to form the cylinder chamber. Specifically, the bottom of the main body 1 is recessed to form a cylinder chamber, and a mounting through hole is provided at the top of the cylinder chamber to communicate with the wedge head avoidance slot at the top of the main body 1. The mounting through hole is provided with an annular groove for installing an O-ring 14 to seal when the wedge head support rod 8 moves up and down. The cylinder body 19 is hollow inside and penetrates from top to bottom. The cavity inside the cylinder body 19 is a cylinder chamber. The cylinder chamber at the bottom of the main body 1 and the cylinder chamber in the cylinder body 19 together constitute the cylinder chamber mentioned in this article. The contact surface between the cylinder body 19 and the bottom plate 20 is provided with a groove to set an O-ring 18, that is, the opening at the bottom of the cylinder body 19 is blocked by the bottom plate 20. The opening at the top of the cylinder body 19 is just connected with the opening of the cylinder chamber at the bottom of the main body 1, and the opening at the top of the cylinder body 19 protrudes in the radial direction to form an annular gear 191. The piston parts of the piston 12 and the piston rod 16 are distributed above and below the annular gear 191, and the inner diameter of the annular gear 191 is smaller than the outer diameter of the piston 12 and the piston rod 16.

[0058] The bottom of the piston 12 and the contact surface of the fixing member 15 are provided with a circle groove around the center of the piston 12 for assembling an O-ring 14 to seal the cylinder chamber. The piston 12 is movably matched with the cylinder chamber, and the circumferential side wall of the piston 12 is provided with an annular groove for assembling a C-ring 13 to seal when the wedge head support rod 8 slides.

[0059] The piston rod 16 is a slender stepped shaft, including a rod portion and a piston portion that are integrally connected. The rod portion is in the shape of a long shaft, and the piston portion is in the shape of a flat disc and is coaxially connected to the bottom end of the rod portion. The wedge strut 8 has a central hole that runs through from top to bottom and matches the rod portion of the piston rod 16. The rod portion of the piston rod 16 slides through the central hole of the wedge strut 8. The rod portion of the piston rod 16 or the central hole of the wedge strut 8 is provided with two annular grooves for installing O-rings 17, so as to seal when the wedge strut 8 and the piston rod 16 move relative to each other. The piston portion of the piston rod 16 is movably matched with the cylinder chamber, and an annular groove for installing a C-ring 13 is provided on the circumferential side wall of the piston portion, so as to seal when the piston portion of the piston rod 16 slides.

[0060] The pressing block includes a cylinder pressing block 2 and a product pressing block 3 that contacts the top of the back cover of the watch in a contoured manner. The cylinder pressing block 2 is rotatably mounted on the top of the rod portion of the piston rod 16, and the cylinder pressing block 2 can be rotated. Figure 6-7 Specifically, the product pressing block 3 is provided with a placement groove, and a window 301 is provided at the bottom of the placement groove, and the product placement block 5 is positioned at the top center of the main body 11 through the pin 7 and covers the wedge avoidance slot hole, and is fixed by the hexagon socket screw 4. A piston rod avoidance hole 501 is provided at the center of the product placement block 5 to avoid the rod of the piston rod 16. After the rod of the piston rod 16 passes through the wedge support rod 8, it passes through the piston rod avoidance hole 501, and then passes through the window 301 of the product pressing block 3 to connect with the plug screw 1. Specifically, the top of the rod of the piston rod 16 has a built-in thread, and the plug screw 1 is threadedly connected to the built-in thread. The cylinder pressing block 2 is restricted between the plug screw 1 and the bottom of the placement groove and can be rotated. The cylinder block 2 is placed in the placement groove and can rotate in the placement groove under manual operation. The shape and size of the window 301 allow the cylinder block 2 to pass through the window 301 without obstacles only when it is rotated to a suitable angle. The cylinder block 2 has two ears 201 extending horizontally, and the two ears 201 are arranged opposite to each other. Figure 7 As shown in (a), when unloading or loading, the cylinder block 2 is in a loose state, and the two ears 201 are rotated to completely fall into the range of the window 301 of the placement groove; when processing products, the cylinder block 2 is in a compressed state, such as Figure 7 As shown in (b), the cylinder pressing block 2 is rotated until its ears are placed on the bottom of the placement groove, and at this time, the cylinder pressing block 2 is confined between the plug screw 1 and the bottom of the placement groove.

[0061] refer to Figure 6The product placement block 5 is also surrounded by a plurality of notches 502 surrounding the center of the product placement block 5 and corresponding to the plurality of inner support arms. The notches 502 are located at positions corresponding to the corners of the watch back cover, and the inner support blocks 6 of the inner support arms are hidden in the notches 502.

[0062] Specifically, the product placement block 5 includes a circle of support steps 52 for placing the watch back cover and an inner cavity positioning protrusion 51 that matches the inner cavity gap of the watch back cover. The support step 52 surrounds and is lower than the inner cavity positioning protrusion 51. The center of the inner cavity positioning protrusion 51 penetrates the piston rod avoidance hole 501, and the notch 502 penetrates the support step 52 in the radial direction and extends into the corner of the inner cavity positioning protrusion 51. The inner cavity positioning protrusion 51 can be used to pre-position the product accurately, while the product placement block 5 in the prior art cannot pre-position the product accurately and can only roughly position the product.

[0063] The inner support block 6 is L-shaped, including a horizontal fixing part and a vertical inner support part. The bottom of the horizontal fixing part is convex downward to form a convex block, and a groove is provided on the top of the slider 9. The extension direction of the convex block and the groove is perpendicular to the sliding direction of the slider 9. The convex block at the bottom of the horizontal fixing part is inserted into the groove at the top of the slider 9 and fixed to the top of the slider 9 by the hexagon socket screw 4, and the horizontal fixing part is hidden in the notch 502 of the support step 52. The vertical inner support part of the inner support block 6 is hidden in the notch 502 of the corner of the inner cavity positioning convex block 51, and the side of the vertical inner support part away from the center of the product placement block 5 is a contoured contact surface that contours the inner side wall of the watch back cover. In other words, the inner support block 6 in this embodiment is a corner that clamps the watch back cover. Because the four corners of the product have a strong structure, the four sides of the inner support product are easily deformed, and the four corners of the inner support can prevent product deformation. Moreover, the inner support block 6 is only hidden in the notch, and can be pulled out from the notch to directly contact the product during internal support. Compared with the original solution in which the inner support block is accommodated in the product placement block, the reliability of the inner support is greatly improved.

[0064] The gas path structure and principle of the embodiment of the present invention are described below

[0065] refer to Figure 8 , 9 In the embodiment of the present invention, the inner wall of the cylinder chamber is connected to the first vent hole H1 near the annular gear position 191, the inner wall of the cylinder chamber is connected to the second vent hole H2 near the upper edge, and the inner wall of the cylinder chamber is connected to the third vent hole H3 near the lower edge. The first vent hole H1, the second vent hole H2, and the third vent hole H3 are respectively connected to an external air source through a stainless steel joint 10 to achieve air intake control of the three air chambers. Due to limited space when installing the stainless steel joint 10, the first vent hole H1 and the third vent hole H3 are designed as a "Z"-shaped air path.

[0066] Specifically, the first ventilation hole H1 is in a "Z" shape, including an upper ventilation groove opened on the upper end surface of the cylinder body 19 and extending in the radial direction of the clamp, a lower ventilation hole extending downward from the bottom of the upper ventilation groove, and a first connecting hole opened on the side wall of the cylinder body 19 and directly connected to the lower ventilation hole along the radial direction of the clamp. The first connecting hole is a threaded hole, and the stainless steel joint 10 is installed in the threaded hole, and the external air pipe 300 is connected to the stainless steel joint 10.

[0067] Specifically, the second vent hole H2 includes a horizontal vent hole and a second connection hole which are directly provided in the main body 1 in the radial direction and are coaxially connected. The horizontal vent hole is directly connected to the topmost air chamber of the three air chambers in the radial direction of the fixture. The second connection hole has a larger aperture than the horizontal vent hole and is a threaded hole that penetrates the outer wall of the main body 1. The stainless steel joint 10 is installed in the threaded hole, and the external air pipe 400 is connected to the stainless steel joint 10.

[0068] Specifically, the third vent hole is in a "Z" shape, including a lower vent groove provided on the lower end surface of the cylinder body 19 and extending in the radial direction of the fixture, an upper vent hole extending upward from the bottom of the lower vent groove, and a third connecting hole provided on the side wall of the cylinder body 19 and directly connected to the upper vent hole in the radial direction of the fixture. The third connecting hole is a threaded hole, the stainless steel joint 10 is installed in the threaded hole, and the external air pipe 500 is connected to the stainless steel joint 10.

[0069] It can be seen that in this embodiment, the piston 12 divides the cylinder chamber of the main body 11 into two upper and lower cylinder chambers, and the piston rod 16 divides the cylinder chamber of the cylinder body 19 into two upper and lower cylinder chambers. When the cylinder body 19 and the main body 11 are assembled together, the cylinder chamber in the lower part of the main body 11 and the cylinder chamber in the upper part of the cylinder body 19 are connected to form an air chamber, that is, the piston part of the piston rod 16 in the cylinder body 19 and the piston 12 of the main body 11 are merged into one air chamber, so the two pistons share one air inlet. When the external air pipe 300 is ventilated, it enters the air chamber through the second connecting hole, driving the piston 12 to move up and the piston rod 16 to move down. The wedge head support rod 8 on the piston 12 cooperates with the inclined surface of the slider 9, thereby forcing the slider 9 to move radially outward. At the same time, the piston rod 16 pulls the cylinder block 2 to press the product block 3 downward, realizing downward pressure and internal support, and clamping the product. On the contrary, when the air pipes 400 and 500 are ventilated, the mechanism is reset and the product is released.

[0070] The assembly process of the fixture in this embodiment is:

[0071] The fixture assembly 201 and the inner support assembly 202 are connected by positioning with the pin 7 and fixing with the hexagon socket screw 4, and the protrusion at the bottom of the horizontal fixing portion of the inner support block 6 and the groove at the top of the slider 9 of the inner support assembly 203 are positioned and fixed by the hexagon socket screw 4;

[0072] The inner support assembly 202 is assembled by the following process: first, the O-ring 14 is installed in the mounting hole of the main body 11, and the C-ring 131 and the O-ring 14 are installed in the side wall groove and the bottom groove of the piston 12 respectively. Then, four sliders 9 are installed along the guide groove 101 of the main body 11, and then the T-shaped inclined boss 801 of the wedge head support rod 8 is assembled according to the inclined T-slot 901 on the slider 9. The wedge head support rod 8 will also pass through the mounting hole in the middle of the main body 11 and then through the middle hole of the piston 12, and finally, they are fixed together with the fixing part 15.

[0073] The pressing component 203 is assembled in the following process: first, the O-ring 17 and the C-ring 13 are installed on the piston rod 16, and the O-ring 18 and the pin 7 are installed on the upper end surface of the cylinder body 19. The pin 7 cooperates with the pin hole on the bottom plate 20 to realize the positioning of the cylinder body 19. Finally, the piston rod 16 passes through the cylinder body 19 and the inner support component 202, and the middle part of the fixture tooling component 201, and the cylinder pressure block 2 and the plug screw 1 are installed on the top of the piston rod 16.

[0074] The assembly process of the fixture base assembly 204 is as follows: the O-ring 18 is installed in the groove on the bottom plate 20, and then the four-axis base 24 and the bridge plate 20 are assembled together with the pin 22 and the hexagon socket screw 23. Finally, the fixture base assembly 204, the inner support assembly 202, and the lower pressing assembly 203 are fixed together by the hexagon socket screw 21, and the stainless steel joint 10 is connected.

[0075] The process of the present invention for processing is as follows: the employee clamps the product on the fixture 200, then places the product pressing block 3, and then manually moves the cylinder pressing block 2 to rotate it 90 degrees to Figure 7 In state (b), the machine switch is turned on, the air source enters from the air pipe 300, and the clamp 200 is supported and pressed down to clamp the product; after the processing is completed, the air source enters from the air lines 400 and 500, the clamp movement mechanism is reset, the product is released, and the employee can manually turn the cylinder block 2 to rotate it 90 degrees Figure 7 In state (a), take out the product block 3 and finally remove the product.

[0076] The double-mechanism-linked inner support and pressing clamp for processing the contoured surface of the back cover of a watch of the present invention has the following beneficial effects: the inner support clamping of the present invention can avoid the phenomenon that the material warps up due to the inner support, reduces the clamping time of employees and improves the fault tolerance of the clamp; moreover, the present invention arranges piston rods and pistons up and down in the cylinder chamber to divide it into three air chambers, and the middle air chamber is shared by the piston rod and the piston. When air is sucked into it, the piston moves up and synchronously drives the piston rod to move down. Since the wedge head support rod sliding seal is inserted into the cylinder chamber and connected with the piston, a plurality of inner support hands are slidably installed on the main body along different radial directions, and a plurality of inner support hands are in contact with the top wedge head inclined surface of the wedge head support rod at the same time, so that they can be stretched open as the wedge head support rod moves upward to clamp the inner side wall of the back cover of the watch, and at the same time, the rod portion of the piston rod is slidingly sealed and sleeved in the wedge head support rod and passes through the product placement block and is connected with the pressing block located above the product placement block, so that it can be moved with the movement The downward movement of the plug rod presses the watch back cover, so that the clamp can trigger radial horizontal movement and axial vertical movement at the same time. The horizontal inner support can limit the product's X / Y horizontal freedom, and the downward pressure can limit the product's Z freedom. Compared with the prior art, in the downward movement process, the inner wall of the watch back cover is first supported internally, and then the pressure block is pulled downward to press the top of the watch back cover, the present invention can realize the linkage of internal support and downward pressure without affecting their respective clamping forces, and both are driven by cylinders, so the clamping force of the product of the present invention is more reliable and will not appear jamming; moreover, because the two cylinder mechanisms are combined to share one air chamber, the air path and pipelines can be simplified, the fixture space structure can be saved, and the fixture can be made more compact; the pre-precise positioning of the product placement block of the present invention, combined with the hiding method and position of the inner support block, can enable the present invention to improve the pre-positioning accuracy while increasing the clamping force and avoiding product deformation.

[0077] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0079] Terms including ordinal numbers such as "first" and "second" used in this specification may be used to describe various components, but these components are not limited by these terms. The purpose of using these terms is only to distinguish one component from other components. For example, without departing from the scope of the present invention, the first component may be named as the second component, and similarly, the second component may also be named as the first component.

[0080] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A double-mechanism linkage inner support and pressing fixture for processing the contoured surface of the back cover of a watch, characterized in that: It comprises a main body, a product placement block arranged on the top of the main body for positioning and placing the watch back cover, a piston rod, a piston, a wedge support rod, a plurality of inner support hands extending into the product placement block along the radial direction of the fixture, and a pressure block; A cylinder chamber is arranged at the bottom of the main body, and the piston and the piston part of the piston rod are arranged in the cylinder chamber in a vertically separated manner, so that the cylinder chamber is divided into three air chambers. When the air chamber in the middle is inhaled, the piston is driven to move upward and the piston rod is driven to move downward synchronously; The wedge support rod is inserted into the cylinder chamber and connected to the piston by sliding and sealing along the axial direction of the clamp, and a plurality of inner support hands are slidably installed on the main body along different radial directions of the clamp, and a plurality of inner support hands are simultaneously in contact with the top wedge inclined surface of the wedge support rod, so as to be stretched open as the wedge support rod moves upward, thereby clamping the inner side wall of the back cover of the watch; The rod portion of the piston rod is inserted into the wedge head support rod along the axial sliding seal of the clamp and passes through the product placement block. The pressure block is located above the product placement block and connected to the rod portion of the piston rod to press the watch back cover as the piston rod moves downward.

2. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 1, characterized in that: The top wedge of the wedge support rod comprises a plurality of T-shaped inclined surface bosses distributed around the central axis of the wedge support rod, wherein the T-shaped inclined surface bosses extend obliquely and gradually move away from the center of the wedge support rod from top to bottom; The inner supporter comprises a sliding block which is slidably mounted on the main body along the radial direction of the clamp, and a slanted T-slot which is slidably matched with the T-shaped slanted boss is arranged on the side of the sliding block facing the central axis of the wedge head support rod.

3. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 2, characterized in that: A piston rod avoidance hole is provided in the center of the product placement block and passes through from top to bottom to avoid the rod portion of the piston rod. A plurality of notches are also provided around the center of the product placement block and correspond to the plurality of inner support hands one by one. The notches are located at positions corresponding to the corners of the watch back cover, and the inner support hands are hidden in the notches along the radial direction of the clamp.

4. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 3, characterized in that: The product placement block includes a circle of supporting steps for placing the watch back cover and an inner cavity positioning protrusion that cooperates with the inner cavity gap of the watch back cover. The supporting steps surround and are lower than the inner cavity positioning protrusion. The center of the inner cavity positioning protrusion passes through the piston rod avoidance hole, and the notch passes through the supporting steps in the radial direction and extends into the corner of the inner cavity positioning protrusion.

5. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 4, characterized in that: The inner support hand comprises an inner support block; The inner support block is L-shaped, and includes a horizontal fixing portion and a vertical inner support portion. The horizontal fixing portion is fixed to the top of the slider and hidden in the notch of the support step, and the vertical inner support portion is hidden in the notch of the corner of the inner cavity positioning protrusion. The side of the vertical inner support portion facing away from the center of the product placement block is a contoured contact surface that contours the inner side wall of the watch back cover.

6. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 1, characterized in that: It also includes fixings; The bottom end of the wedge head support rod is threadedly connected to the fixing piece, and the wedge head support rod is reduced in diameter near the bottom end to form a circle of limiting step surface. The piston is coaxially sleeved outside the wedge head support rod and is clamped up and down by the limiting step surface and the fixing piece.

7. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 1, characterized in that: The pressing block includes a cylinder pressing block and a product pressing block in conformal contact with the top of the back cover of the watch, wherein the cylinder pressing block is rotatably mounted on the top of the rod portion of the piston rod. The product pressing block is provided with a placement groove, and a window which passes through from top to bottom is provided at the bottom of the placement groove. The rod portion of the piston rod passes through the window. The cylinder pressing block is placed in the placement groove and can rotate in the placement groove. The shape and size of the window enable the cylinder pressing block to pass through the window unimpeded only when it is rotated to a suitable angle.

8. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 1, characterized in that: The inner wall of the cylinder chamber protrudes in the radial direction of the fixture to form an annular gear, the piston and the piston rod are arranged above and below the annular gear, and the inner diameter of the annular gear is smaller than the outer diameter of the piston and the piston rod; The inner wall of the cylinder chamber is connected to the first air vent near the annular gear position, the inner wall of the cylinder chamber is connected to the second air vent near the upper edge, and the inner wall of the cylinder chamber is connected to the third air vent near the lower edge. The first air hole, the second air hole, and the third air hole are respectively connected to external air sources to realize air intake control of the three air chambers.

9. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 8, characterized in that: It also includes a cylinder body and a bottom plate, wherein the cylinder body is mounted on the top of the bottom plate and a sealing ring is arranged between the contact surfaces of the two, the main body is mounted on the top of the cylinder body and a sealing ring is arranged between the contact surfaces of the two, and the main body, the cylinder body and the bottom plate are enclosed together to form the cylinder chamber; The cylinder body is hollow inside and penetrates from top to bottom, the opening at the top of the cylinder body protrudes in the radial direction of the fixture to form the annular gear position, and the bottom plate blocks the opening at the bottom of the cylinder body; The first vent hole includes an upper vent groove formed on the upper end surface of the cylinder body, a lower vent hole extending downward from the bottom of the upper vent groove, and a first connecting hole formed on the side wall of the cylinder body and directly connected to the lower vent hole; The second vent hole comprises a horizontal vent hole and a second connecting hole which are directly connected to the main body along the radial direction of the clamp, the horizontal vent hole is directly connected to the topmost air chamber, and the second connecting hole is opened on the side wall of the cylinder body; The third vent hole includes a lower vent groove formed on the lower end surface of the cylinder body, an upper vent hole extending upward from the bottom of the lower vent groove, and a third connecting hole formed on the side wall of the cylinder body and directly connected to the upper vent hole.

10. The double-mechanism-linked inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 2, characterized in that: A wedge head avoidance slot is provided at the top of the main body, and the top wedge head of the wedge head support rod is located in the wedge head avoidance slot and can move up and down therein; a plurality of guide rail slots extending along the radial direction of the clamp and the same number as the plurality of sliders are provided at the top of the main body, and the plurality of guide rail slots intersect at the wedge head avoidance slot, and the slider is inserted into the guide rail slot along the radial direction of the clamp to slide and cooperate therewith; The top of the cylinder chamber is provided with a mounting through hole connected with the wedge head avoidance slot, the wedge head support rod passes through the mounting through hole, and the mounting through hole is provided with an annular groove for mounting a sealing ring, so as to play a sealing role when the wedge head support rod moves up and down; the circumferential side wall of the piston is provided with an annular groove for mounting a sealing ring, so as to play a sealing role when the wedge head support rod slides; The wedge head support rod has a central hole that passes through the upper and lower parts and matches the rod portion of the piston rod. The rod portion of the piston rod slides through the central hole of the wedge head support rod. The rod portion of the piston rod or the central hole of the wedge head support rod is provided with an annular groove for installing a sealing ring, so as to seal when the wedge head support rod and the piston rod move relative to each other; the circumferential side wall of the piston portion of the piston rod is provided with an annular groove for assembling a sealing ring, which is used to seal when the piston portion of the piston rod slides.

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