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 downward pressing is achieved, the respective clamping force is not affected, the inner supporting and the downward pressing are both driven by the air cylinder, the clamping force of the clamp on a product 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 utility model relates to watch processing field especially, relate to a double -body linkage's inside bracing down -pressing clamp of processing watch back cover profiled surface. BACKGROUND

[0002] In the prior art, before the watch back cover is processed by CNC (Computerized Numerical Control), the watch back cover needs to be clamped and positioned by a clamp. The existing clamp adopts a scheme of product inner cavity profiling positioning plus cover plate locking screw. The locking screw clamping is inconvenient for the staff to operate, increases the clamping time, and may cause product cracking due to improper operation of the staff, increasing many uncontrollable factors. The product inner cavity profiling positioning cannot completely adapt to the clamp positioning, and there is a positioning gap or interference, which may cause the risk of displacement of the product in the horizontal direction, and the interference causes the product to be unable to be placed into the inner cavity of the watch back cover. In order to solve the above problems, the applicant designs an inside bracing down-pressing clamp, which is referred to the document with the publication number CN118848589A. This clamp uses a support rod to move downward through multiple inside bracing hands, and during the downward movement, the multiple inside bracing hands are expanded outward in the radial direction to interference fit with different positions of the inner side wall of the watch back cover, and then continue to move downward to pull the pressing block to press the top of the watch back cover. In this way, manual clamping and positioning are not required, and the degrees of freedom in the horizontal and vertical directions can be simultaneously limited. However, it is found that the clamping force of this scheme is insufficient, the clamping reliability needs to be optimized, and the machining and assembly precision of the clamp is extremely high. If the machining and assembly are not in place, the middle support rod may be stuck due to uneven or excessive stress, and the product may be pressed in a virtual manner. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a double -body linkage's inside bracing down -pressing clamp for processing watch back cover profiled surface in view of the above -mentioned unreliable clamping defects of the prior art.

[0004] The utility model adopts the technical scheme in the technical solution: construct a double -body linkage's inside bracing down -pressing clamp for processing watch back cover profiled surface, it includes the main part, the product placing block for positioning placing the watch back cover of setting in the main part top, piston rod, piston, wedge head support rod, multiple inside bracing hands along the radial direction of clamp and enter the product placing block, pressing block;

[0005] The main part bottom sets up the cylinder chamber, the piston and the piston part of piston rod are arranged in the cylinder chamber and separated up and down, so as to divide the cylinder chamber into three gas chambers, when the middle gas chamber admits air, the piston is driven to move up and the piston rod is driven to move down synchronously;

[0006] The wedge head support rod is inserted into the cylinder chamber in axial sliding sealing connection with the piston, a plurality of the inner support hands are installed in the main body in different radial directions of the clamp and simultaneously contact the top wedge head inclined surface of the wedge head support rod to be supported apart and clamp the inner side wall of the watch back cover as the wedge head support rod moves upward;

[0007] The rod part of the piston rod is inserted into the wedge head support rod in axial sliding sealing connection and passes out from the product placing block, the pressing block is located above the product placing block and is connected with the rod part of the piston rod to press the watch back cover as the piston rod moves downward.

[0008] Further, in the double-mechanism linkage inner support downward pressing clamp for machining a profile surface of a watch back cover, the top wedge head of the wedge head support rod comprises a plurality of T-shaped inclined surface bosses distributed around the central axis of the wedge head support rod, the T-shaped inclined surface bosses are inclined and extend and gradually move away from the center of the wedge head support rod from top to bottom;

[0009] The inner support hand comprises a sliding block, the sliding block is installed in the main body in the radial direction of the clamp, and the side surface of the sliding block facing the central axis of the wedge head support rod is provided with an inclined surface T groove in sliding connection with the T-shaped inclined surface boss.

[0010] Further, in the double-mechanism linkage inner support downward pressing clamp for machining a profile surface of a watch back cover, the central part of the product placing block is provided with a piston rod avoiding hole for avoiding the rod part of the piston rod, and a plurality of openings corresponding to the plurality of inner support hands are formed around the center of the product placing block, the openings are located at positions corresponding to the corners of the watch back cover, and the inner support hand is hidden in the opening in the radial direction of the clamp.

[0011] Further, in the double-mechanism linkage inner support downward pressing clamp for machining a profile surface of a watch back cover, the product placing block comprises a support step for placing the watch back cover and an inner cavity positioning boss in clearance fit with the inner cavity of the watch back cover, the support step surrounds and is lower than the inner cavity positioning boss, the central part of the inner cavity positioning boss is provided with the piston rod avoiding hole, and the opening passes through the support step in the radial direction and extends into the corner of the inner cavity positioning boss.

[0012] Further, in the double-mechanism linkage inner support downward pressing clamp for machining a profile surface of a watch back cover, the inner support hand comprises an inner support block;

[0013] The inner support block is L-shaped, comprising a horizontal fixed part and a vertical inner support part, the horizontal fixed part is fixed to the top of the sliding block and hidden in the gap of the support step, the vertical inner support part is hidden in the gap of the corner of the inner cavity positioning block, and the vertical inner support part is away from the center side of the product placing block and is provided with a profiled contact surface which is profiled according to the inner side wall of the watch back cover.

[0014] Further, the double-mechanism linkage inner support down-pressing clamp for machining the profiled surface of the watch back cover further comprises a fixing member;

[0015] The bottom end of the wedge head support rod is in threaded connection with the fixing member, the wedge head support rod is reduced in diameter at the bottom end position to form a limiting step surface, and the piston is coaxially sleeved on the wedge head support rod and is clamped by the limiting step surface and the fixing member.

[0016] Further, in the double-mechanism linkage inner support down-pressing clamp for machining the profiled surface of the watch back cover, the pressing block comprises a cylinder pressing block and a product pressing block in contact with the top of the watch back cover, the cylinder pressing block is rotatably installed on the top end of the rod part of the piston rod,

[0017] The product pressing block is provided with a placing groove, an upper and lower through window is formed in the bottom of the placing groove, the rod part of the piston rod passes through the window, the cylinder pressing block is placed in the placing groove and can rotate in the placing groove, and the shape and size of the window are such that the cylinder pressing block can pass through the window without obstacles only when the cylinder pressing block is rotated to a proper angle.

[0018] Further, in the double-mechanism linkage inner support down-pressing clamp for machining the profiled surface of the watch back cover, the inner side wall of the cylinder chamber is protruded along the radial direction of the clamp to form an annular gear, the piston and the piston part of the piston rod are arranged above and below the annular gear, and the inner diameter size of the annular gear is smaller than the outer diameter size of the piston and the piston rod.

[0019] The inner side wall of the cylinder chamber is connected with a first air passage at the position of the annular gear, the inner side wall of the cylinder chamber is connected with a second air passage at the position of the upper edge, the inner side wall of the cylinder chamber is connected with a third air passage at the position of the lower edge, and the first air passage, the second air passage and the third air passage are respectively connected with external air sources to realize air inlet control of the three air chambers.

[0020] Further, the double-mechanism linkage inner support down-pressing clamp for machining the profiled surface of the watch back cover further comprises 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 cylinder body and the bottom plate, and the main body is installed on the top of the cylinder body and a sealing ring is arranged between the contact surfaces of the main body and the cylinder body.

[0021] The cylinder is hollow and penetrates through the top and bottom, and the opening at the top of the cylinder protrudes along the radial direction of the clamp to form the annular gear, and the bottom plate blocks the opening at the bottom of the cylinder;

[0022] The first air hole comprises an upper air groove formed on the upper end surface of the cylinder, a lower extension air hole extending downward from the groove bottom of the upper air groove, and a first connecting hole formed on the side wall of the cylinder and directly connected to the lower extension air hole.

[0023] The second air hole comprises a horizontal air hole and a second connecting hole arranged in the main body along the radial direction of the clamp, the horizontal air hole is directly connected to the topmost air chamber, and the second connecting hole is formed on the side wall of the cylinder.

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

[0025] Further, in the double-mechanism linkage inner supporting down-pressing clamp for profiling the back cover of a watch according to the utility model, a wedge head avoiding groove hole is formed on the top of the main body, and the top wedge head of the wedge head supporting rod is located in the wedge head avoiding groove hole and can move up and down in the wedge head avoiding groove hole; a plurality of guide rail grooves extending along the radial direction of the clamp are formed on the top of the main body in a number consistent with that of the plurality of sliding blocks, the plurality of guide rail grooves converge at the wedge head avoiding groove hole, and the sliding blocks are inserted into the guide rail grooves and slidably matched with the guide rail grooves along the radial direction of the clamp.

[0026] The top of the air cylinder chamber is provided with an installation through hole in communication with the wedge head avoiding groove hole, the wedge head supporting rod passes through the installation through hole, and the installation through hole is provided with an annular recess for mounting a sealing ring to play a sealing role when the wedge head supporting rod moves up and down; the circumferential side wall of the piston is provided with an annular recess for mounting a sealing ring to play a sealing role when the wedge head supporting rod slides.

[0027] A middle hole penetrating through the top and bottom and matched with the rod part of the piston rod is formed in the wedge head supporting rod, the rod part of the piston rod slides through the middle hole of the wedge head supporting rod, and the rod part of the piston rod or the middle hole of the wedge head supporting rod is provided with an annular recess for mounting a sealing ring to play a sealing role when the wedge head supporting rod and the piston rod relatively move; the circumferential side wall of the piston part of the piston rod is provided with an annular recess for mounting a sealing ring to play a sealing role when the piston part of the piston rod slides.

[0028] The double-mechanism linkage inner supporting and downward pressing clamp for profiling the back cover of a watch has the following beneficial effects: the double-mechanism linkage inner supporting and downward pressing clamp for profiling the back cover of a watch is characterized in that a piston rod and a piston are arranged in the cylinder chamber in an up-down mode, the cylinder chamber is divided into three chambers by the piston rod and the piston, the middle chamber is shared by the piston rod and the piston, when air is introduced into the middle chamber, the piston moves upward and synchronously drives the piston rod to move downward, the wedge supporting rod is connected with the piston by being slidingly and sealingly inserted into the cylinder chamber, the plurality of inner supporting hands are slidingly arranged on the main body in different radial directions, the plurality of inner supporting hands simultaneously contact with the wedge of the wedge supporting rod, so that the inner supporting hands can be separated to clamp the inner side wall of the watch back cover when the wedge supporting rod moves upward, the rod part of the piston rod is slidingly and sealingly arranged in the wedge supporting rod and extends out of the product placing block and is connected with the pressing block above the product placing block, so that the watch back cover can be pressed when the piston rod moves downward, the clamp can simultaneously trigger radial horizontal movement and axial vertical movement, the horizontal inner supporting can limit the horizontal degree of freedom of the product, the downward pressing can limit the vertical degree of freedom of the product, compared with the prior art, the inner supporting hand moves upward to clamp the inner side wall of the watch back cover and then the pressing block is pulled to press the top of the watch back cover, the clamp can realize linkage of inner supporting and downward pressing, and the clamping force is not affected, and the clamp is driven by the cylinder, so that the clamping force of the clamp is more reliable and the clamp is not jammed. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings:

[0030] Figure 1 is the application scene schematic diagram of the double-mechanism linkage inner supporting and downward pressing clamp for profiling the back cover of a watch of the present application;

[0031] Figure 2 is the assembly exploded view of the double-mechanism linkage inner supporting and downward pressing clamp for profiling the back cover of a watch of the present application;

[0032] Figure 3 is the exploded view of the double-mechanism linkage inner supporting and downward pressing clamp for profiling the back cover of a watch of the present application;

[0033] Figure 4 is the sectional view of the double-mechanism linkage inner supporting and downward pressing clamp for profiling the back cover of a watch of the present application;

[0034] Figure 5is the matching relationship schematic diagram of the wedge head supporting rod and the sliding block;

[0035] Figure 6 is the matching relationship schematic diagram of the product placing block and the supporting block;

[0036] Figure 7 is the rotating schematic diagram of the pressing block;

[0037] Figure 8 is the three-way air path schematic diagram;

[0038] Figure 9 is the air hole schematic diagram;

[0039] In the drawings, various reference signs represent:

[0040] 100, product; 201, clamp tool assembly; 202, inner supporting assembly; 203, lower pressing assembly; 204, clamp base assembly; 300, first air pipe; 400, second air pipe; 500, third air pipe;

[0041] 1, screw; 2, cylinder pressing block; 3, product pressing block; 4, inner hexagonal screw; 5, product placing block; 6, inner supporting block; 7, pin; 8, wedge head supporting rod; 9, sliding block; 10, stainless steel joint; 11, main body; 12, piston; 13, C-shaped sealing ring; 14, O-shaped sealing ring; 15, fixing piece; 16, piston rod; 17, O-shaped sealing ring; 18, O-shaped sealing ring, 19, cylinder body, 20, bottom plate; 21, inner hexagonal screw; 22, pin; 23, inner hexagonal screw; 24, four-axis base; 101, guide rail groove; 801, T-shaped boss; 901, T-shaped groove; 301, window; 201, ear; 501, piston rod avoiding hole; 502, notch; 51, inner cavity positioning protrusion; 52, supporting step; 191, annular notch; H1, first air hole; H2, second air hole; H3 is the third air hole. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The drawings show typical embodiments of the present application. However, the present application can be realized 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 application more thorough and comprehensive. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0043] Reference Figure 1The utility model discloses a inner support lower pressure clamp 200 top is used for placing the watch back cover of waiting for processing, namely the product 100 in this article, and the clamp 200 is connected with external gas source through first air pipe 300, second air pipe 400, third air pipe 500 three air pipes. The gas source enters from first air pipe 300, and the inner support lower pressure clamp 200 supports and presses the product 100, and the gas source enters from second air pipe 400 and third air pipe 500, and the inner support lower pressure clamp 200 resets, and loosens the product 100.

[0044] Reference Figure 2 The inner support lower pressure clamp 200 is classified from top to bottom according to different functions, and is roughly classified into clamp tool assembly 201, inner support assembly 202, lower pressure assembly 203 and clamp base assembly 204. The clamp tool assembly 201 is the component for clamping the product, and plays the role of positioning and fixing. The inner support assembly 202 is an actuator, and is used for realizing horizontal movement in four radial directions. The lower pressure assembly 203 is an actuator, and is used for realizing vertical downward pressing action of the clamp in the axial direction. The clamp base assembly 204 is used for bearing the clamp and connecting the component of the machine table.

[0045] Reference Figures 3-4 The clamp tool assembly 201 mainly includes product placing block 5 for positioning the watch back cover, inner support block 6 and pressing block. The inner support assembly 202 mainly includes main body 1, piston 12, wedge head support rod 8 and sliding block 9. The lower pressure assembly 203 mainly includes piston rod 16.

[0046] The axial direction of the clamp mentioned in this article refers to the direction of the center straight line of the product 100, and is also the direction of the center straight line of the clamp, is the direction of the downward pressing of the pressing block, and is also 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 straight line of the product 100. The horizontal direction in this article is parallel to the radial direction of the clamp. The center axis of the piston rod 16 and the center axis of the wedge head support rod 8 in the utility model coincide with the center straight line of the product.

[0047] The product placing block 5 is arranged at the top of the main body 1 and is used for positioning the product 100. The cylinder chamber is arranged at the bottom of the main body 1, and the main body 1 is fixed with the cylinder body 19 in an up-down mode, so that the cylinder chamber is formed. The piston 12 and the piston part of the piston rod 16 are arranged in the cylinder chamber in an up-down mode, so that the cylinder chamber is divided into three chambers. When the middle chamber is filled with air, the piston 12 is driven to move upward, and the piston rod 16 is synchronously driven to move downward.

[0048] The inner support block 6 and the sliding block 9 form an inner support hand. Of course, in other embodiments, the inner support block 6 and the sliding block 9 can be integrally formed into an inner support hand. The inner support hand extends into the product placing block 5 in the radial direction of the clamp, and specifically, the inner support block 6 of the inner support hand extends into the product placing block 5. The wedge support rod 8 is slidingly and sealingly inserted into the cylinder chamber and connected with the piston 12. A plurality of inner support hands are slidingly installed on the main body 1 in different radial directions of the clamp, and simultaneously contact the top wedge inclined surface of the wedge support rod 8, so as to be supported and opened by the upward movement of the wedge support rod 8, thereby clamping the inner side wall of the watch back cover.

[0049] The rod part of the piston rod 16 is slidingly and sealingly inserted into the wedge support rod 8 and extends out of the product placing block 5. The pressing block is located above the product placing block 5 and connected with the rod part of the piston rod 16, so as to press the watch back cover by the downward movement of the piston rod 16.

[0050] That is, the utility model is equivalent to driving the horizontal inner support and the vertical downward product by two sets of cylinder mechanisms, and the two actions can be synchronously linked but do not affect each other. Compared with the prior art, in the downward process, the inner support hand first supports the inner side wall of the watch back cover, and then continues to move downward to pull the pressing block to press the top of the watch back cover. The clamping force of the utility model on the product is more reliable, and the phenomenon of jamming does not occur. Moreover, because the two cylinder mechanisms are combined to share one air chamber, the air path and pipeline can be simplified, the space structure of the clamp is saved, and the clamp is more compact.

[0051] The components will be described in more detail below.

[0052] The clamp tool assembly 201 mainly includes a screw 1, a cylinder pressing block 2, a product pressing block 3, an inner hexagonal screw 4, a product placing block 5, and an inner support block 6. The inner support assembly 202 mainly includes a pin 7, a wedge support rod 8, a sliding block 9, a stainless steel joint 10, a main body 11, a piston 12, a C-shaped sealing ring 13, an O-shaped sealing ring 14, and a fixing piece 15. The downward pressing assembly 203 mainly includes a piston rod 16, an O-shaped sealing ring 17, a pin 7, a C-shaped sealing ring 13, an O-shaped sealing ring 18, a cylinder body 19, and a stainless steel joint 10. The clamp base assembly 204 mainly includes an O-shaped sealing ring 18, a bridge plate 20, an inner hexagonal screw 21, a pin 22, an inner hexagonal screw 23, and a four-axis base 24.

[0053] In this embodiment, the main body 1 is substantially a cylinder, and the appearance shape is not limited in practice. Referring to Figure 5The top of the main body 1 is provided with a plurality of guide grooves 101 corresponding to the number of sliders 9, which extend through the side wall of the main body 1 in the radial direction of the clamp and are connected to the center of the main body 1. The sliders 9 are inserted into the guide grooves 101 and slide in the radial direction of the clamp, thereby achieving linear motion of the sliders 9. In this embodiment, four sliders 9 are designed, so there are also four guide grooves 101, and the adjacent guide grooves 101 are spaced 90° apart.

[0054] The top center of the main body 1 is also provided with a wedge head avoiding groove to avoid the top wedge head of the wedge support rod 8, which is located in the wedge head avoiding groove and can move up and down therein. The plurality of guide grooves 101 converge at the wedge head avoiding groove. The top wedge head of the wedge support rod 8 is in inclined sliding contact with the slider 9, and the inclination direction is gradually away from the center axis of the wedge support rod 8 from top to bottom, so as to realize the conversion of up and down sliding into horizontal reciprocating motion, that is, the upward movement of the top wedge head 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 head of the wedge support rod 8 can be converted into the radial inward movement of the slider 9.

[0055] Reference Figure 5 Specifically, the circumferential side of the top wedge head of the wedge support rod 8 includes four T-shaped inclined surface bosses 801 distributed around the center of the wedge support rod 8, which extend obliquely and gradually away from the center of the wedge support rod 8 from top to bottom. The cross section of the T-shaped inclined surface boss 801 is T-shaped, and the cross section refers to the cross section perpendicular to the extension direction of the T-shaped inclined surface boss 801. The slider 9 is slidably installed on the main body 1 in the radial direction, and the side of the slider 9 facing the center axis of the wedge support rod 8 is provided with an inclined T-shaped groove 901 in sliding contact with the T-shaped inclined surface boss 801, so as to prevent the T-shaped inclined surface boss 801 from being pulled out of the inclined T-shaped groove 901 and only allow the T-shaped inclined surface boss 801 to slide in the inclined T-shaped groove 901.

[0056] The main body of the wedge head support rod 8 is a cylindrical rod, the top end of which is connected with a wedge head, the radial size of which is larger than that of the cylindrical rod, and the wedge head is in sliding fit with the sliding block 9. The top of the cylinder chamber is provided with a mounting through hole in communication with the wedge head avoiding slot hole, the cylindrical rod of the wedge head support rod 8 passes through the mounting through hole, the bottom end of the cylindrical rod extends into the uppermost cylinder chamber, and the bottom end of the cylindrical rod is in threaded connection with the fixing member 15. The piston 12 is disc-shaped and is provided with a through hole in the center, the part of the bottom end of the wedge head support rod 8 extending out of the through hole of the piston 12 is reduced in diameter to form a limiting step surface at the position of the bottom end of the wedge head support rod 8, the piston 12 is coaxially sleeved on the wedge head support rod 8 and is clamped by the limiting step surface and the fixing member 15, so that the piston 12 and the wedge head support rod 8 are connected, and the piston 12 and the wedge head support rod 8 form a piston rod. Specifically, the fixing member 15 is a fixing nut, and the inside of the fixing nut is provided with internal threads. The section between the bottom end surface of the wedge head support rod 8 and the limiting step surface is provided with external threads, 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 through hole of the piston 12.

[0057] The main body 1 is mounted on top of the cylinder 19, and the cylinder 19 is mounted on top of the base plate 20, which is specifically a bridge plate. In this embodiment, multiple pins 21 are inserted into the cylinder 19 from the bottom of the base plate until they are screwed into the main body 1, thereby connecting the main body 1, cylinder 19, and base plate 20 together. One side of the base plate 20 is connected to a four-axis base 24 side-by-side via hexagonal screws 23. The four-axis base 24 is used to mount a turntable. An O-ring seal 18 is provided in a groove on either side of the contact surface of the main body 1 and cylinder 19, or both sides are provided with O-ring seals 18. The main body 1, cylinder 19, and base plate 20 together enclose the cylinder chamber. Specifically, the bottom of the main body 1 is recessed to form a cylinder chamber. A mounting through hole is formed at the top of the cylinder chamber, communicating with the wedge-shaped clearance slot at the top of the main body 1. This mounting through hole has an annular groove for mounting an O-ring seal 14, which provides a sealing function when the wedge-shaped support rod 8 moves up and down. The cylinder body 19 is hollow and vertically connected. 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 inside the cylinder body 19 together form the cylinder chamber mentioned herein. An O-ring seal 18 is provided in a groove on the contact surface between the cylinder body 19 and the base plate 20, meaning the opening at the bottom of the cylinder body 19 is sealed by the base plate 20. The opening at the top of the cylinder body 19 is aligned with the opening of the cylinder chamber at the bottom of the main body 1. The opening at the top of the cylinder body 19 protrudes radially to form an annular stop 191. The piston portions of the piston 12 and the piston rod 16 are located above and below the annular stop 191. The inner diameter of the annular stop 191 is smaller than the outer diameter of the piston 12 and the piston rod 16.

[0058] A groove is formed around the center of the piston 12 at the bottom of the contact surface with the fixing member 15 for mounting an O-ring seal 14 to seal the cylinder chamber. The piston 12 is movably fitted with the cylinder chamber, and an annular groove for mounting a C-ring seal 13 is formed on the circumferential sidewall of the piston 12 to provide a sealing effect when the wedge head support rod 8 slides.

[0059] The piston rod 16 is an elongated stepped shaft, including a rod part and a piston part connected integrally, the rod part is long shaft, the piston part is flat disc, coaxially connected to the bottom end of the rod part. The wedge head support rod 8 is internally provided with a through hole matching the rod part of the piston rod 16, the rod part of the piston rod 16 slides through the through hole of the wedge head support rod 8, and the rod part of the piston rod 16 or the through hole of the wedge head support rod 8 is provided with two annular grooves for mounting O-shaped sealing rings 17 to seal when the wedge head support rod 8 and the piston rod 16 move relatively. The piston part of the piston rod 16 is movably matched with the cylinder chamber, and the circumferential side wall of the piston part is provided with an annular groove for assembling a C-shaped sealing ring 13 to seal when the piston part of the piston rod 16 slides.

[0060] The pressing block includes a cylinder pressing block 2 and a product pressing block 3 in contact with the top of the watch back cover, the cylinder pressing block 2 is rotatably installed at the top end of the rod part of the piston rod 16, and the cylinder pressing block 2 can be rotated. Figures 6-7 Specifically, the product pressing block 3 is provided with a placement groove, the bottom of the placement groove is provided with a through window 301, the product placement block 5 is positioned at the top center of the main body 11 and covers the wedge head avoiding groove hole through the pin 7, and is fixed through the internal hexagonal screw 4. The center of the product placement block 5 is provided with a piston rod avoiding hole 501 passing through up and down to avoid the rod part of the piston rod 16, the rod part of the piston rod 16 passes through the piston rod avoiding hole 501 from the wedge head support rod 8, and then passes through the window 301 of the product pressing block 3 to be connected with the plug screw 1, specifically, the top of the rod part of the piston rod 16 is internally threaded, the plug screw 1 is threadedly connected with the internal thread, and the cylinder pressing block 2 is limited between the plug screw 1 and the bottom of the placement groove and can be rotated. The cylinder pressing 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 are such that the cylinder pressing block 2 can pass through the window 301 without obstacles only when it is rotated to a suitable angle. The cylinder pressing block 2 has two horizontally extending ears 201, which are oppositely arranged. As shown in (a) of Figure 7 When the material is to be discharged or fed, at this time the cylinder pressing block 2 is in a loose state, the two ears 201 are rotated to completely fall within the range of the window 301 of the placement groove; when the product is processed, at this time the cylinder pressing block 2 is in a pressed state, as shown in (b) of Figure 7 The cylinder pressing block 2 is rotated to its ears resting on the bottom of the placement groove, at this time the cylinder pressing block 2 is limited between the plug screw 1 and the bottom of the placement groove.

[0061] Referring to Figure 6The product placing block 5 is further provided with a plurality of cutouts 502 around the center of the product placing block 5 and corresponding to the plurality of inner supporting hands, and the cutouts 502 are located at positions corresponding to the corners of the watch back cover.

[0062] Specifically, the product placing block 5 comprises a circle of supporting steps 52 for supporting the watch back cover and inner cavity positioning protrusions 51 matched with the inner cavity gap of the watch back cover, the supporting steps 52 surround and are lower than the inner cavity positioning protrusions 51, the center of the inner cavity positioning protrusions 51 is provided with the piston rod avoiding hole 501, and the cutouts 502 extend into the corners of the inner cavity positioning protrusions 51 in the radial direction. The inner cavity positioning protrusions 51 can be used for pre-accurately positioning the product, and the product placing block 5 in the prior art cannot pre-accurately position the product but only coarsely position the product.

[0063] The inner supporting block 6 is L-shaped and comprises a horizontal fixing part and a vertical inner supporting part, the bottom of the horizontal fixing part is provided with a protrusion, the top of the sliding block 9 is provided with a groove, the extension directions of the protrusion and the groove are perpendicular to the sliding direction of the sliding block 9, the protrusion of the bottom of the horizontal fixing part is inserted into the groove of the top of the sliding block 9 and is fixed to the top of the sliding block 9 through the inner hexagonal screw 4, and the horizontal fixing part is hidden in the cutout 502 of the supporting step 52. The vertical inner supporting part of the inner supporting block 6 is hidden in the cutout 502 of the corner of the inner cavity positioning protrusion 51, and the side of the vertical inner supporting part away from the center of the product placing block 5 is a profiled contact surface profiled according to the inner side wall of the watch back cover. That is, the inner supporting block 6 in the embodiment supports and clamps the corner of the watch back cover, the product is strong at the four corners, the inner supporting of the four sides of the product is prone to deformation, and the inner supporting of the four corners can avoid the deformation of the product. Moreover, the inner supporting block 6 is only hidden in the cutout, can be pulled out from the cutout to directly contact the product during the inner supporting, and compared with the original solution that the inner supporting block is accommodated in the product placing block, the inner supporting reliability is greatly improved.

[0064] The gas path structure and principle of the embodiment of the utility model will be introduced below

[0065] Reference Figure 8 , 9 In the embodiment of the utility model, the inner side wall of the cylinder chamber is communicated with the first air hole H1 at the position of the annular notch 191, the inner side wall of the cylinder chamber is communicated with the second air hole H2 at the position of the upper edge, the inner side wall of the cylinder chamber is communicated with the third air hole H3 at the position of the lower edge, and the first air hole H1, the second air hole H2 and the third air hole H3 are respectively connected with the external air source through the stainless steel joint 10 to realize the air inlet control of the three gas chambers. Since the space is limited when the stainless steel joint 10 is installed, the first air hole H1 and the third air hole H3 are designed as a Z-shaped gas path.

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

[0067] Specifically, the second venting hole H2 includes a horizontal venting hole provided in the main body 1 along the radial direction and coaxially communicating, and a second connecting hole. The horizontal venting hole directly communicates with the topmost air chamber of the three air chambers along the radial direction of the clamp. The second connecting hole has a larger diameter than the horizontal venting hole and is a threaded hole penetrating the outer side wall of the main body 1. A stainless steel joint 10 is installed in the threaded hole, and an external air pipe 400 is connected to the stainless steel joint 10.

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

[0069] It can be seen that in the present 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 lower cylinder chamber of the main body 11 and the upper cylinder chamber of the cylinder body 19 communicate to form one 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 merge to form one air chamber, so that the two pistons share one air inlet. When the external air pipe 300 is vented, the air enters the air chamber through the second connecting hole, drives the piston 12 to move upward and the piston rod 16 to move downward, and the wedge head of the piston 12 drives the slide block 9 to move radially outward through the inclined surface of the slide block 9, thereby forcing the slide block 9 to move radially outward, and the piston rod 16 pulls the air cylinder pressing block 2 to press the product pressing block 3 downward, thereby achieving pressing and internal supporting, and clamping the product. Conversely, when the air pipes 400 and 500 are vented, the mechanism resets and releases the product.

[0070] The assembly process of the clamp of the present embodiment is as follows:

[0071] The clamp tool assembly 201 and the internal supporting assembly 202 are connected by positioning with the pin 7 and fixed by the internal hexagonal screw 4. After the protrusion at the bottom of the horizontal fixing part of the internal supporting block 6 is positioned in the groove at the top of the slide block 9 of the internal supporting assembly 203, the internal hexagonal screw 4 is used for fixation.

[0072] The inner support assembly 202 is assembled by first installing the O-shaped sealing ring 14 in the mounting hole of the main body 11, installing the C-shaped sealing ring 131 and the O-shaped sealing ring 14 in the side wall groove and the bottom groove of the piston 12 respectively, then installing the four sliding blocks 9 along the guide groove 101 of the main body 11, assembling the T-shaped inclined convex platform 801 of the wedge head support rod 8 according to the inclined T-shaped groove 901 on the sliding block 9, the wedge head support rod 8 passing through the mounting hole in the middle of the main body 11 and then passing through the middle hole of the piston 12, and finally fixing the assembled parts together by the fixing part 15.

[0073] The down pressing assembly 203 is assembled by first installing the O-shaped sealing ring 17 and the C-shaped sealing ring 13 on the piston rod 16, installing the O-shaped sealing ring 18 and the pin 7 on the upper end face of the cylinder body 19, positioning the cylinder body 19 by matching the pin hole on the bottom plate 20 with the pin 7, and finally passing the piston rod 16 through the middle part of the cylinder body 19, the inner support assembly 202 and the clamp tool assembly 201, and installing the cylinder pressing block 2 and the plug screw 1 on the top of the piston rod 16.

[0074] The clamp base assembly 204 is assembled by first installing the O-shaped sealing ring 18 in the groove on the bottom plate 20, then assembling the four-axis base 24 and the bridge plate 20 together by the pin 22 and the internal hexagonal screw 23, and finally fixing the clamp base assembly 204, the inner support assembly 202 and the down pressing assembly 203 together by the internal hexagonal screw 21, and connecting the stainless steel connector 10.

[0075] The process for processing of the utility model is as follows: the employee clamps the product on the clamp 200, then places the product pressing block 3, manually rotates the cylinder pressing block 2 to the (b) state in the Figure 7 , starts the machine switch, the gas source enters from the air pipe 300, the clamp 200 supports and presses the product; after processing is completed, the gas source enters from the gas path 400 and the gas path 500, the clamp moving mechanism resets, the product is loosened, the employee manually rotates the cylinder pressing block 2 to the (a) state in the Figure 7 , takes out the product pressing block 3, and finally takes down the product.

[0076] This utility model discloses a dual-mechanism linkage internal support pressing clamp for processing the contoured surface of a watch back cover. It offers the following advantages: The internal support clamping mechanism prevents material warping due to internal support, reducing clamping time and increasing the clamp's tolerance. Furthermore, the cylinder chamber is divided into three chambers by a piston rod and piston positioned vertically. The middle chamber is shared by the piston rod and piston. When air is introduced, the piston moves upward and simultaneously drives the piston rod downward. Because the wedge-shaped support rod slides and seals into the cylinder chamber and connects to the piston, multiple internal support arms slide along different radial directions on the main body. These arms simultaneously contact the inclined surface of the top wedge of the wedge-shaped support rod, thus opening and clamping the inner wall of the watch back cover as the wedge-shaped support rod moves upward. Simultaneously, the piston rod slides and seals within the wedge-shaped support rod and extends from the product placement block, connecting to the pressure block located above the product placement block. Therefore, it can move with the piston... The downward movement of the rod presses down on the watch back cover, thus the clamp can simultaneously trigger radial horizontal movement and axial vertical movement. The horizontal inner support restricts the X / Y horizontal degrees of freedom of the product, while the downward pressure restricts the Z-axis degree of freedom. Compared with the prior art, which 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 down on the top of the watch back cover, this utility model can achieve linkage between the inner support and the downward pressure without affecting their respective clamping forces. Moreover, both are driven by cylinders, so the clamping force of this utility model is more reliable and will not cause jamming. Furthermore, because the two cylinder mechanisms are combined and share a single air chamber, the air circuit and pipelines can be simplified, saving space in the clamping structure and making the clamp more compact. The pre-precise positioning of the product placement block in this utility model, combined with the hiding method and position of the inner support block, allows this utility model to improve the accuracy of pre-positioning, increase the clamping force, and prevent product deformation.

[0077] 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," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0078] 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.

[0079] The terms including ordinal numbers, such as "first", "second" and the like, used in the specification can be used to describe various constituent elements, but the constituent elements are not limited by the terms. The purpose of using the terms is only to distinguish one constituent element from other constituent elements. For example, under the premise of not departing from the scope of the utility model, the first constituent element can be named as the second constituent element, and similarly, the second constituent element can also be named as the first constituent element.

[0080] The embodiments of the utility model are described above in combination with the drawings, but the utility model is not limited to the specific embodiments described above, and the specific embodiments described above are only illustrative but not restrictive, and the ordinary skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, which all belong to the protection of the utility model.

Claims

1. A dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch case back, characterized in that, Includes a main body, a product placement block disposed on the top of the main body for positioning and placing the watch back cover, a piston rod, a piston, a wedge head support rod, multiple inner support hands extending into the product placement block along the radial direction of the clamp, and a pressure block; The bottom of the main body is provided with a cylinder chamber. The piston and the piston part of the piston rod are separated vertically in the cylinder chamber, thereby dividing the cylinder chamber into three chambers. When air enters the middle chamber, it drives the piston to move upward and simultaneously drives the piston rod to move downward. The wedge head support rod is slidably and sealed into the cylinder chamber along the clamp axis and connected to the piston. Multiple inner support arms are slidably installed on the main body along different radial directions of the clamp. Multiple inner support arms simultaneously contact the top wedge head inclined surface of the wedge head support rod, so as the wedge head support rod moves upward and opens up, thereby clamping the inner wall of the watch back cover. The piston rod is slidably and sealed into the wedge head support rod along the clamp axis and passes through the product placement block. The pressure block is located above the product placement block and connected to the piston rod to press down on the watch back cover as the piston rod moves downward.

2. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 1, characterized in that, The top wedge of the wedge head strut includes a plurality of T-shaped inclined bosses distributed around the central axis of the wedge head strut, the T-shaped inclined bosses extending obliquely and gradually moving away from the center of the wedge head strut from top to bottom; The inner support includes a slider, which is slidably mounted on the main body along the radial direction of the clamp. The side of the slider facing the central axis of the wedge head support is provided with a sloping T-groove that slides in cooperation with the T-shaped inclined boss.

3. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 2, characterized in that, The product placement block has a piston rod clearance hole that runs vertically through the center to avoid the piston rod rod. The product placement block also has multiple notches around its center, corresponding to the multiple inner support arms. The notches are located at positions corresponding to the corners of the watch back cover. The inner support arms are radially inserted into the notches along the clamp.

4. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 3, characterized in that, The product placement block includes a ring of supporting steps for supporting the watch back cover and an inner cavity positioning protrusion that fits with the inner cavity of the watch back cover. The supporting steps surround and are lower than the inner cavity positioning protrusion. The piston rod clearance hole is opened through the center of the inner cavity positioning protrusion. The notch passes through the supporting steps in the radial direction and extends into the corner of the inner cavity positioning protrusion.

5. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 4, characterized in that, The inner support arm includes an inner support block; The inner support block is L-shaped and includes a horizontal fixing part and a vertical inner support part. The horizontal fixing part is fixed to the top of the slider and is hidden in the notch of the support step. The vertical inner support part is hidden in the notch at the corner of the inner cavity positioning protrusion. The side of the vertical inner support part away from the center of the product placement block is a contoured contact surface that conforms to the inner side wall of the watch back cover.

6. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 1, characterized in that, It also includes fasteners; The bottom end of the wedge head support rod is threadedly connected to the fixing member. The wedge head support rod is narrowed near the bottom end to form a limiting step surface. The piston is coaxially sleeved outside the wedge head support rod and is clamped by the limiting step surface and the fixing member from above and below.

7. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 1, characterized in that, The pressure block includes a cylinder pressure block and a product pressure block that conforms to the top of the watch back cover. The cylinder pressure block is rotatably mounted on the top of the piston rod. The product pressing block has a mounting groove, and the bottom of the mounting groove has a window that runs vertically through it. The rod of the piston rod passes through the window. The cylinder pressing block is placed in the mounting groove and can rotate within it. The shape and size of the window allow the cylinder pressing block to pass through it unobstructed when it rotates to a suitable angle.

8. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 1, characterized in that, The inner sidewall of the cylinder chamber protrudes in the radial direction of the clamp to form an annular stop. The piston portion of the piston and the piston rod are located above and below the annular stop. The inner diameter of the annular stop is smaller than the outer diameter of the piston and the piston rod. The inner side wall of the cylinder chamber is connected to the first vent hole near the annular stop position, the upper edge of the inner side wall of the cylinder chamber is connected to the second vent hole, and the lower edge of the inner side wall of the cylinder chamber is connected to the third vent hole. The first vent hole, the second vent hole, and the third vent hole are respectively connected to an external air source to realize the air intake control of the three air chambers.

9. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 8, characterized in that, It also includes a cylinder body and a base plate. The cylinder body is mounted on the top of the base plate and a sealing ring is provided between the contact surfaces of the two. The main body is mounted on the top of the cylinder body and a sealing ring is provided between the contact surfaces of the two. The main body, the cylinder body, and the base plate together enclose the cylinder chamber. The cylinder body is hollow inside and runs through the top and bottom. The opening at the top of the cylinder body protrudes in the radial direction of the clamp to form the annular stop. The bottom plate blocks the opening at the bottom of the cylinder body. The first vent includes an upper vent groove formed on the upper end face of the cylinder body, a lower vent 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 connecting to the lower vent. The second vent hole includes a horizontal vent hole and a second connecting hole that are directly disposed on 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. The third vent hole includes a lower vent groove formed on the lower end face of the cylinder block, 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 block and directly connecting to the upper vent hole.

10. The dual-mechanism linkage inner support pressing fixture for machining the contoured surface of a watch back cover according to claim 2, characterized in that, The top of the main body is provided with a wedge head clearance slot, and the top wedge of the wedge head support rod is located in the wedge head clearance slot and can move up and down therein; the top of the main body is provided with multiple guide rail grooves extending in the radial direction of the clamp, which are the same number as the number of multiple sliders, and the multiple guide rail grooves converge at the wedge head clearance slot, and the sliders are inserted into the guide rail grooves in the radial direction of the clamp and slide in cooperation with them. The top of the cylinder chamber has a mounting through hole that communicates with the wedge head clearance slot. The wedge head support rod passes through the mounting through hole. The mounting through hole is provided with an annular groove for mounting a sealing ring to provide a sealing function when the wedge head support rod moves up and down. The circumferential sidewall of the piston has an annular groove for mounting a sealing ring to provide a sealing function when the wedge head support rod slides. The wedge-shaped support rod has a through-hole that matches the rod portion of the piston rod. The rod portion of the piston rod slides through the through-hole of the wedge-shaped support rod. The rod portion of the piston rod or the through-hole of the wedge-shaped support rod is provided with an annular groove for installing a sealing ring, so as to provide a sealing effect when the wedge-shaped support rod and the piston rod move relative to each other. The circumferential sidewall of the piston portion of the piston rod is provided with an annular groove for assembling a sealing ring, which is used to provide a sealing effect when the piston portion of the piston rod slides.

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