Inner support pressing clamp for processing profiling surface of rear cover of watch

Abstract

An inner support pressing clamp for machining a profiling surface of a rear cover of a watch comprises a clamp body (1), a support rod (2), movable inner support blocks (3) and a pressing block (5), a product mounting station (6) is arranged on the clamp body (1), the support rod (2) penetrates through the product mounting station (6), the movable inner support blocks (3) are annularly distributed in the product mounting station (6) and all face the support rod (2), and the pressing block (5) is arranged on the clamp body (1). The movable inner supporting blocks (3) are installed on the clamp body (1) and can slide in different radial directions of the supporting rod (2), and the pressing block (5) is located above the product installation station (6) and connected with the supporting rod (2). The supporting rod (2) is used for moving downwards to penetrate through the multiple movable inner supporting blocks (3) and continuously moving downwards to pull the pressing block (5) to press the top of the rear cover of the watch after the multiple movable inner supporting blocks (3) are opened outwards in the radial direction to be in interference fit with different positions of the inner side wall of the rear cover of the watch in the downward moving process, so that the clamping time of workers can be shortened, and the reliability and the error-tolerant rate of the clamp are improved.

Description

Technical Field

[0001] The utility model relates to the field of watch processing, in particular to an inner support and downward pressing fixture for processing the profiling surface of a watch back cover. Background Art

[0002] In the prior art, before a watch back cover is processed by CNC (Computerized Numerical Control), the watch back cover needs to be clamped and positioned by a fixture. The existing fixture adopts a scheme of profiling and positioning the inner cavity of the product and locking screws with a cover plate. Locking the screws for clamping is inconvenient for employees to operate, increases the clamping time, has low efficiency, and may also cause the product to be cracked due to improper operation of employees, adding many uncontrollable factors, so the reliability is insufficient; the profiling and positioning of the inner cavity of the product is affected by the size specifications of the product incoming materials and cannot fully adapt to the fixture positioning, resulting in problems of positioning clearance or interference. The clearance will cause the risk of displacement of the product in the horizontal direction, and the interference will cause phenomena such as the product cannot be put in or stuck, so the error tolerance rate is low. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an inner support and downward pressing fixture for processing the profiling surface of a watch back cover in view of the above-mentioned defects of low efficiency, poor reliability and low error tolerance rate in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is to construct an inner support and downward pressing fixture for processing the profiling surface of a watch back cover, which includes a fixture main body, a support rod, a plurality of movable inner support blocks for cooperating with different positions of the inner side wall of the watch back cover, and a pressing block for pressing down the watch back cover;

[0005] A product installation station for positioning and placing the watch back cover and penetrating up and down is arranged on the fixture main body. The support rod passes through the product installation station. The plurality of movable inner support blocks are distributed around the product installation station and all face the central axis of the support rod. Each of the movable inner support blocks is installed on the fixture main body and can slide along different radial directions of the support rod. The pressing block is located above the product installation station and is connected to the support rod;

[0006] The support rod is used to move downward through the plurality of movable inner support blocks, and during the downward movement, the plurality of movable inner support blocks are radially expanded outward to be in 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.

[0007] Further, in the inner support and downward pressing fixture for processing the profiling surface of a watch back cover of the utility model, the plurality of movable inner support blocks uniformly surround the support rod;

[0008] Alternatively, it further includes a plurality of fixed inner support blocks corresponding to the plurality of movable inner support blocks one by one. The plurality of fixed inner support blocks are distributed within the product installation station such that when the watch back cover is placed on the product installation station, the plurality of fixed inner support blocks are exactly in imitation positioning with different positions on the inner side of the watch. Each fixed inner support block and the corresponding movable inner support block are distributed opposite to each other on both sides of the support rod.

[0009] Further, in the inner support pressing fixture for machining the profiling surface of the watch back cover according to the present invention, a rotatable roller structure is provided at one end of the movable inner support block facing the central axis of the support rod, and the movable inner support block is in rolling contact with the support rod through the roller structure.

[0010] Further, in the inner support pressing fixture for machining the profiling surface of the watch back cover according to the present invention, the support rod includes a cylindrical pressing portion and a spreading portion connected to the bottom of the cylindrical pressing portion. The spreading portion gradually reduces in diameter from top to bottom, and the maximum radial dimension of the spreading portion is the same as the radial dimension of the cylindrical pressing portion;

[0011] In the initial state, the spreading portion is located above the plurality of movable inner support blocks, and the movable inner support blocks are separated from the inner side wall of the watch back cover; during the downward pressing process of the support rod, the spreading portion gradually inserts between the roller structures of the plurality of movable inner support blocks, and gradually spreads the movable inner support blocks by maintaining rolling contact with the wheel surfaces of the roller structures. When the cylindrical pressing portion takes over the spreading portion and inserts between the roller structures of the plurality of movable inner support blocks, the movable inner support blocks are in interference fit with different positions on the inner side wall of the watch back cover, and the cylindrical pressing portion continues to move downward for a certain distance based on the rolling contact with the wheel surfaces of the roller structures to make the pressing block press the watch back cover.

[0012] Further, in the inner support pressing fixture for machining the profiling surface of the watch back cover according to the present invention, the outer peripheral surface of the spreading portion is a concave rotating surface and the curvature of the rotating surface gradually increases from bottom to top.

[0013] Further, in the inner support pressing fixture for machining the profiling surface of the watch back cover according to the present invention, the fixture body is provided with a window penetrating up and down, the product installation station surrounds the window, the wheel surfaces of the roller structures are located within the window, and a cylinder for driving the support rod to move vertically is installed at the bottom of the fixture body;

[0014] The support rod further includes a cylindrical pre - support portion connected to the bottom of the spreading portion. The radial dimension of the cylindrical pre - support portion is the same as the minimum radial dimension of the spreading portion. In the initial state, the cylindrical pre - support portion passes through the window and the roller structures of the plurality of movable inner support blocks and is connected to the cylinder.

[0015] Furthermore, in the inner support pressing fixture for processing the contoured surface of the back cover of a watch described in the utility model, the product installation station is fixed on the top of the fixture body, the movable inner support block includes a slider and a support hand for cooperating with the inner side wall of the back cover of the watch, the fixture body is provided with a plurality of linear slide rails corresponding to each slider, the slider is located in the linear slide rail and cooperates with the corresponding linear slide rail sleeve, the support hand is installed on the top of the slider, and the support hand passes through the product installation station and is higher than the product installation station;

[0016] A groove is provided at one end of the slider facing the central axis of the support rod, and the roller structure is installed in the groove. The wheel surface of the roller structure protrudes from the end surface of the slider, and the distance between the wheel surface of the roller structure and the support rod is smaller than the distance between the slider and the support rod.

[0017] Furthermore, in the inner support and pressing clamp for processing the contoured surface of the back cover of a watch described in the utility model, the movable inner support block also includes an elastic member, and a plurality of elastic member blocks corresponding to each of the sliders are also installed on the clamp body, and each of the elastic member blocks is directly opposite to the end of the slider away from the roller structure; the elastic member is connected between the end of the slider away from the roller structure and the elastic member block, and is used to provide thrust for the slider, so as to push the slider to move closer to the support rod and reset when the support rod moves up and resets.

[0018] Furthermore, in the inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the utility model, the fixture body is a flat plate-like structure, each of the linear slide rails passes through different sides of the fixture body and the window, the elastic member block is detachably installed on the side of the fixture body and blocks the end of the linear slide rail, the top of the linear slide rail is open to expose the top of the slider for installing the support hand; the product installation station includes an annular support part for placing the watch back cover and a plurality of support legs that jointly support the annular support part, the support hand is L-shaped and is divided into a horizontal fixing part and a vertical side push part for cooperating with the inner side wall of the watch back cover, the fixing part is stacked and fixed on the top of the slider, the side push part passes through the annular support part and is higher than the annular support part, the wheel surface of the roller structure is closer to the central axis of the support rod relative to the side push part, the support leg is fixed to the top of the fixture body, and the annular support part maintains a certain distance from the top of the fixture body under the support of the support leg to allow the fixing part to move under the drive of the slider.

[0019] Furthermore, in the inner support and pressing fixture for processing the contoured surface of the back cover of a watch described in the utility model, the cylinder includes a cylinder body, a cylinder piston rod, a cylinder sealing disk, a first sealing ring, a second sealing ring, a cylinder dust ring, and a hole retaining ring;

[0020] The cylinder block is installed at the bottom of the fixture body and faces the window. A cylinder joint communicating the inside and outside of the cylinder block is connected to the side wall of the cylinder block. The cylinder sealing disc is fixedly assembled in the cylinder block, and the outer peripheral side wall of the cylinder sealing disc and the inner peripheral side wall of the cylinder block are in sealing fit through the second sealing ring. The top of the cylinder sealing disc is restricted from moving upward by the snap ring for hole. The main body part of the cylinder piston rod is movably installed in the cylinder block and is restricted below the cylinder sealing disc. The first sealing ring is sleeved outside the main body part of the cylinder piston rod. The rod part of the cylinder piston rod passes through the cylinder sealing disc and is connected to the support rod. A cylinder dust-proof ring is installed between the rod part of the cylinder piston rod and the cylinder sealing disc.

[0021] The inner support and downward pressing fixture for machining the profiling surface of the watch back cover of the present utility model has the following beneficial effects: on the one hand, the support rod moves downward to expand and squeeze the movable inner support blocks, so that the plurality of movable inner support blocks move radially outward along different directions, thereby clamping the product by the inner support method; on the other hand, after the movable inner support blocks are expanded by the support rod during the downward movement and are in interference fit with different positions on the inner side wall of the watch back cover, the support rod will continue to move downward to pull the pressing block to press the top of the watch back cover and press the product tightly. In this way, without manual clamping and positioning, the present utility model can restrict the degrees of freedom in both the horizontal and vertical directions at the same time. For machining the outer shape of the product, most of the external forces act on the side surface, and the inner support on the side surface can well offset the cutting force on the side surface, preventing the product from shifting due to external forces caused by positioning gaps or insufficient downward pressure. At the same time, when machining products with different clamping size specifications, only need to slightly increase the size when the movable inner support blocks are fully expanded, which can avoid the positioning gap caused by the difference in the size of the incoming materials. And the inner support method allows interference fit, so the present utility model has a high fault tolerance. All in all, the present utility model can reduce the clamping time of employees and improve the reliability and fault tolerance rate of the fixture. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings:

[0023] Figure 1 It is a schematic structural diagram of the first embodiment of the inner support and downward pressing fixture of the present utility model;

[0024] Figure 2 It is a cross-sectional view of the first embodiment of the inner support and downward pressing fixture of the present utility model;

[0025] Figure 3This is an exploded view of the first embodiment of the internal support pressing clamp of the utility model;

[0026] Figure 4 It is an exploded schematic diagram of a single movable inner support block;

[0027] Figure 5 It is a schematic diagram of the structure of the cylinder;

[0028] Figure 6 It is a cross-sectional view of the cylinder;

[0029] Figure 7 It is a partial structural schematic diagram of the second embodiment of the internal support and pressing clamp of the utility model. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings below. Typical embodiments of the present invention are given 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.

[0031] Embodiment 1

[0032] refer to Figures 1-3 The inner support pressing fixture for processing the contoured surface of the watch back cover of this embodiment includes a fixture body 1, a support rod 2, a plurality of movable inner support blocks 3 for cooperating with different positions of the inner side wall of the watch back cover, a pressing block 5 for pressing down the watch back cover, and a cylinder 7.

[0033] The fixture body 1 is a carrier that connects other parts and is roughly a flat rectangular plate-like structure. Of course, there is no limitation on the shape of the fixture body 1. The fixture can be used for processing the contoured surface of the back cover of a watch, so a connecting structure 9 is provided on one side of the fixture body 1 to connect with a five-axis precision carving workbench. The fixture body 1 is provided with a product installation station 6 that is used to position and place the back cover of the watch and is connected from top to bottom. Specifically, the fixture body 1 is provided with a window that is connected from top to bottom, and the product installation station 6 surrounds the window. Reference Figure 3 The product installation station 6 includes an annular support portion 61 for placing the watch back cover and four support legs 62 for supporting the annular support portion 61. The four support legs 62 are evenly distributed around the annular support portion 61, and the support legs 62 are fixed to the top of the fixture body 1 by screws.

[0034] refer to Figures 2-3The bottom of the clamp body 1 is provided with a cylinder 7 for driving the support rod 2 to move vertically. Figures 5-6 The cylinder 7 is a one-way reciprocating piston cylinder, including a cylinder body 71, a cylinder piston rod 72, a cylinder sealing disk 73, a first sealing ring 74, a second sealing ring 75, a cylinder dust ring 76, and a hole retaining ring 77. The cylinder body 71 is a cylindrical structure with a hollow interior and an open top, which is installed at the bottom of the fixture body 1 and the open mouth faces the window. The side wall of the cylinder body 71 is connected with a tower-shaped cylinder joint 711 for ventilation that connects the inside and outside of the cylinder body 71. The cylinder piston rod 72 includes a disc-shaped main body and a rod portion vertically connected to the center of the main body. The radial size of the main body of the cylinder piston rod 72 is adapted to the radial size of the cylinder body 71. The cylinder sealing disc 73 is fixedly assembled in the cylinder body 71. Specifically, the inner wall of the cylinder body 71 has a circle of steps and a circle of grooves located a certain distance above the steps. The cylinder sealing disc 73 is placed on the step. The hole retaining ring 77 is installed in the circle of grooves and abuts against the cylinder sealing disc 73 up and down. The top of the cylinder sealing disc 73 is limited to move upward by the hole retaining ring 77. The outer peripheral side wall of the cylinder sealing disc 73 and the inner peripheral wall of the cylinder body 71 are sealed by the second sealing ring 75. The cross section of the second sealing ring 75 is O-shaped. The main body of the cylinder piston rod 72 is movably installed in the cylinder 7 and is limited below the cylinder sealing disc 73. The first sealing ring 74 is sleeved outside the main body of the cylinder piston rod 72 to achieve sealing contact with the inner peripheral wall of the cylinder body 71. The cross section of the first sealing ring 74 is C-shaped, and the arc part contacts the inner peripheral wall of the cylinder body 71 outward. The rod portion of the cylinder piston rod 72 passes through the cylinder sealing disk 73 and is connected to the support rod 2 through a screw 78 . A cylinder dust ring 76 is installed between the rod portion of the cylinder piston rod 72 and the cylinder sealing disk 73 .

[0035] The support rod 2 passes through the annular support portion 61 of the product installation station 6 and the window of the fixture body 1 and is connected to the top of the cylinder piston rod 72. A plurality of movable inner support blocks 3 are arranged in a circle in the product installation station 6 and are all facing the central axis of the support rod 2. Each movable inner support block 3 is slidably installed on the fixture body 1 along different radial directions. The pressure block 5 matches the top shape of the watch back cover. The pressure block 5 is located above the product installation station 6 and is connected to the top of the support rod 2 by a plug screw. Figure 2 The support rod 2 is used to move downward through the multiple movable inner support blocks 3, and in the process of moving downward, the multiple movable inner support blocks 3 are spread out radially 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 5 to press the top of the watch back cover.

[0036] Theoretically, there is no limit to the number of movable inner support blocks 3 as long as they can jointly support and position the product. However, taking into account the volume, cost and necessity, the number of movable inner support blocks 3 is four. The four movable inner support blocks 3 are distributed around the support rod 2 in the front, back, left and right directions, and are grouped in pairs to achieve horizontal positioning. For example, two movable inner support blocks 3 facing each other front and back achieve positioning in the front-to-back direction, and two movable inner support blocks 3 facing each other left and right achieve positioning in the left and right direction.

[0037] refer to Figure 3 , 4 Each movable inner support block 3 includes a roller structure 31, a slider 32, a support hand 33 for cooperating with the inner side wall of the back cover of the watch, and an elastic member 34. In this embodiment, the roller structure 31 is a bearing, and the elastic member 34 is a spring.

[0038] The fixture body 1 is provided with four linear slide rails 11 corresponding to the four sliders 32, and a linear slide rail 11 is distributed between two adjacent support legs 62. The four linear slide rails 11 are distributed in the front, back, left and right sides of the window, and all extend along the radial direction of the support rod 2. The four linear slide rails 11 respectively penetrate the front, back, left and right sides of the fixture body 1 and the window. The slider 32 is located in the linear slide rail 11 and cooperates with the corresponding linear slide rail 11 sleeve. The slider 32 is also limited up and down by the linear slide rail 11 to prevent it from flying. During assembly, the slider 32 can be pushed into the linear slide rail 11 from the front / back / left / right side of the fixture body 1, similar to installing a drawer. The top of the linear slide rail 11 is open, so that the top of the slider 32 can be exposed to install the support hand 33, and the support hand 33 passes through the annular support portion 61 and is higher than the annular support portion 61.

[0039] refer to Figures 2-4 A groove is provided at one end of the slider 32 facing the central axis of the support rod 2, and the roller structure 31 is rotatably installed in the groove. The wheel surface of the roller structure 31 protrudes from the end surface of the slider 32, and the wheel surface of the roller structure 31 is located in the window. The distance between the wheel surface of the roller structure 31 and the support rod 2 is smaller than the distance between the slider 32 and the support hand 33 and the support rod 2, that is, the entire movable inner support block 3 is in contact with the support rod 2 only through the wheel surface of the roller structure 31, and the contact is rolling.

[0040] The support 33 is L-shaped, and is divided into a horizontal fixing part and a vertical side push part for cooperating with the inner wall of the back cover of the watch. The fixing part is stacked and fixed on the top of the slider 32 by screws, and the side push part is connected to one end of the fixing part close to the support rod 2. The side push part passes through the annular support part 61 and is higher than the annular support part 61. The wheel surface of the roller structure 31 is closer to the support rod 2 than the side push part. The annular support part 61 maintains a certain distance from the top of the clamp body 1 under the support of the support leg 62 to allow the fixing part to move under the drive of the slider 32.

[0041] Four elastic member blocks 8 corresponding to the four sliders 32 are also installed on the clamp body 1. The elastic member blocks 8 are detachably installed on the side of the clamp body 1 by screws and block the end of the linear guide rail 11. Each elastic member block 8 is directly opposite to the end of the slider 32 away from the bearing 31. The elastic member 34 is connected between the end of the slider 32 away from the bearing 31 and the clamp body 1. Specifically, a positioning column is protruded on the side of the elastic member block 8 facing the slider 32. One end of the elastic member 34 is sleeved on the positioning column, and the other end is against the cross section of the slider 32. The elastic member 34 is used to provide thrust for the slider 32, so as to push the slider 32 to move closer to the strut 2 and reset when the strut 2 moves up and resets.

[0042] Among them, the arc step difference is designed in the middle of the support rod 2 to realize the support of the product. Specifically, refer to Figure 7 The support rod 2 includes a cylindrical pressing portion 21, an opening portion 22 connected to the bottom of the cylindrical pressing portion 21, and a cylindrical pre-supporting portion 23 connected to the bottom of the opening portion 22. The opening portion 22 gradually decreases in diameter from top to bottom, and the maximum radial dimension of the opening portion 22 is consistent with the radial dimension of the cylindrical pressing portion 21, and the radial dimension of the cylindrical pre-supporting portion 23 is consistent with the minimum radial dimension of the opening portion 22. In this embodiment, the outer peripheral surface of the opening portion 22 is a concave rotating curved surface, and its curvature gradually increases from bottom to top. Of course, the outer peripheral surface of the opening portion 22 can also be a conical surface, but compared with the conical surface, the concave rotating curved surface has a better contact effect with the wheel surface of the roller structure 31, and the opening process of the movable inner support block 3 is more stable.

[0043] In the initial state, the columnar pre-supporting portion 23 passes through the window and the roller structures 31 of the plurality of movable inner support blocks 3 and is connected to the cylinder 7. The opening portion 22 is located above the plurality of movable inner support blocks 3, and the movable inner support blocks 3 are separated from the inner side wall of the watch back cover. During the downward pressing process of the support rod 2, the spreading portion 22 replaces the cylindrical pre-support portion 23 and is gradually inserted between the roller structures 31 of the multiple movable inner support blocks 3, and gradually spreads the movable inner support block 3 by maintaining rolling contact with the wheel surface of the roller structure 31; when the cylindrical pressing down portion 21 replaces the spreading portion 22 and is inserted between the roller structures 31 of the multiple movable inner support blocks 3, the movable inner support block 3 is interference fit with the inner side wall of the watch back cover at different positions. At this time, the cylindrical pressing down portion 21 is in rolling contact with the wheel surface of the roller structure 31, so the resistance applied by the roller structure 31 is relatively small, and the cylindrical pressing down portion 21 can continue to move downward until the pressing block 5 presses the watch back cover, thereby achieving vertical positioning.

[0044] This embodiment takes the fixture body 1 as the main body, and reasonably designs and assembles other structures, so that the overall structure is very compact. Two sets of movable inner support blocks 3 are used to achieve positioning in the front-back direction and the left-right direction, that is, to limit the freedom in the XY direction; and the pressure block 5 is used to achieve positioning in the vertical direction, that is, to limit the freedom in the Z direction.

[0045] It is understandable that for different products, different sizes of support rods 2 can be replaced to adapt. For the same product, there may be slight errors in different batches, so the opening size of the entire clamp when opening the product can be pre-adjusted (this can be achieved by designing the size of the support rod 2 or the size of the support hand 33) so that it is slightly larger than the size of the product cavity, thereby avoiding positioning gaps caused by differences in incoming material sizes. Because the opening method is positioned, even if the opening size is larger than the product cavity size, it can be interference-fitted by micro-deformation, so it has high fault tolerance.

[0046] Embodiment 2

[0047] refer to Figure 7The difference between this embodiment and the first embodiment is that the first embodiment is entirely composed of movable inner support blocks 3, and all the movable inner support blocks 3 together embrace the support rod 2. This solution has a risk that the four movable inner support blocks 3 may cause the product to produce rotational deflection. To this end, the present embodiment continues to improve the first embodiment, and designs a plurality of fixed inner support blocks 4 corresponding to the plurality of movable inner support blocks 3. The fixed inner support blocks 4 are directly fixed on the top of the fixture body 1 and cannot be moved. The plurality of fixed inner support blocks 4 are distributed in the product installation station 6 so that when the back cover of the watch is placed in the product installation station 6, the plurality of fixed inner support blocks 4 are precisely positioned in accordance with different positions on the inner side of the watch, and each fixed inner support block 4 and the corresponding movable inner support block 3 are distributed on both sides of the support rod 2, that is, each movable inner support block 3 and a fixed inner support block 4 together support the product.

[0048] In this embodiment, there are two fixed inner support blocks 4 and two movable inner support blocks 3, and the two fixed inner support blocks 4 are integrally formed. Of course, the two fixed inner support blocks 4 can also be separated.

[0049] In summary, the 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: on the one hand, the present invention can support and squeeze the movable inner support block by moving the support rod downward, so that multiple movable inner support blocks can move outward along different radial directions, thereby clamping the product by means of inner support; on the other hand, during the downward movement of the support rod, the movable inner support block is supported and pressed to different positions of the inner wall of the back cover of the watch, and then the movable inner support block will continue to move downward to pull the pressing block to press the top of the back cover of the watch, thereby pressing the product. In this way, the present invention can simultaneously limit the degrees of freedom in the horizontal and vertical directions without manual clamping and positioning. For the shape of processed products, most of the external forces act on the sides, and the side internal supports can offset the cutting forces on the sides very well, preventing the product from being offset by external forces when there is positioning clearance or insufficient downward pressure. At the same time, for products with different clamping dimensions, it is only necessary to slightly increase the size of the movable internal support block when it is fully expanded, which can avoid the positioning clearance caused by the difference in the size of the incoming materials, and the internal support method allows interference fit, so the utility model has a high fault tolerance. In short, the utility model can reduce the clamping time of employees and improve the reliability and fault tolerance of the fixture.

[0050] 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.

[0051] 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 herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0052] The term “connected” or “connected” not only includes directly connecting two entities, but also includes indirectly connecting two entities through other entities having a beneficial improvement effect.

[0053] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all fall within the protection of the utility model.

Claims

1. An inner support and pressing fixture for processing the contoured surface of the back cover of a watch, characterized in that: It comprises a clamp body (1), a support rod (2), a plurality of movable inner support blocks (3) for cooperating with different positions of the inner side wall of the back cover of the watch, and a pressing block (5) for pressing down the back cover of the watch; The fixture body (1) is provided with a product installation station (6) for positioning and placing the watch back cover and passing through from top to bottom; the support rod (2) passes through the product installation station (6); a plurality of movable inner support blocks (3) are arranged in a circle in the product installation station (6) and all face the central axis of the support rod (2); each movable inner support block (3) is installed on the fixture body (1) and can slide along different radial directions of the support rod (2); the pressing block (5) is located above the product installation station (6) and is connected to the support rod (2); The support rod (2) is used to move downward through the plurality of movable inner support blocks (3), and in the process of moving downward, the plurality of movable inner support blocks (3) are radially spread outward to different positions of the inner wall of the watch back cover to achieve interference fit, and then continue to move downward to pull the pressing block (5) to press the top of the watch back cover.

2. The 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 plurality of movable inner support blocks (3) uniformly surround the support rod (2); Alternatively, it further comprises a plurality of fixed inner support blocks (4) corresponding one to one with the plurality of movable inner support blocks (3), the plurality of fixed inner support blocks (4) being distributed in the product installation station (6) so that when the watch back cover is placed in the product installation station (6), the plurality of fixed inner support blocks (4) are precisely positioned in accordance with different positions on the inner side of the watch, and each fixed inner support block (4) and the corresponding movable inner support block (3) are distributed on both sides of the support rod (2) opposite to each other.

3. The inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 1, characterized in that: A rotatable roller structure (31) is provided at one end of the movable inner support block (3) facing the central axis of the support rod (2), and the movable inner support block (3) is in rolling contact with the support rod (2) through the roller structure (31).

4. The 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 support rod (2) comprises a columnar pressing portion (21) and an opening portion (22) connected to the bottom of the columnar pressing portion (21), the opening portion (22) gradually decreases in diameter from top to bottom, and the maximum radial dimension of the opening portion (22) is consistent with the radial dimension of the columnar pressing portion (21); In the initial state, the spreading portion (22) is located above the plurality of movable inner support blocks (3), and the movable inner support blocks (3) are separated from the inner side wall of the back cover of the watch; during the downward pressing process of the support rod (2), the spreading portion (22) is gradually inserted between the roller structures (31) of the plurality of movable inner support blocks (3), and the movable inner support blocks (3) are gradually spread open by maintaining rolling contact with the wheel surface of the roller structure (31); when the columnar pressing portion (21) replaces the spreading portion (22) and is inserted between the roller structures (31) of the plurality of movable inner support blocks (3), the movable inner support blocks (3) are interference-fitted with different positions of the inner side wall of the back cover of the watch, and the columnar pressing portion (21) is able to continue to move downward for a distance based on the rolling contact with the wheel surface of the roller structure (31) so that the pressing block (5) presses the back cover of the watch.

5. The 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 outer peripheral surface of the expansion portion (22) is an inwardly concave rotational curved surface, and the curvature of the rotational curved surface gradually increases from bottom to top.

6. The 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 clamp body (1) is provided with a window which passes through from top to bottom, the product installation station (6) surrounds the window, the wheel surface of the roller structure (31) is located in the window, and a cylinder (7) for driving the support rod (2) to move vertically is installed at the bottom of the clamp body (1); The support rod (2) further comprises a columnar pre-supporting portion (23) connected to the bottom of the support portion (22), wherein the radial dimension of the columnar pre-supporting portion (23) is consistent with the minimum radial dimension of the support portion (22), and in an initial state, the columnar pre-supporting portion (23) passes through the window and the roller structures (31) of the plurality of movable inner support blocks (3) and is connected to the cylinder (7).

7. The inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 6, characterized in that: The product installation station (6) is fixed on the top of the fixture body (1); the movable inner support block (3) comprises a slider (32) and a support hand (33) for cooperating with the inner side wall of the back cover of the watch; the fixture body (1) is provided with a plurality of linear slide rails (11) corresponding to the sliders (32); the sliders (32) are located in the linear slide rails (11) and cooperate with the corresponding linear slide rail (11) sleeves; the support hand (33) is installed on the top of the slider (32); the support hand (33) passes through the product installation station (6) and is higher than the product installation station (6); The slider (32) is provided with a groove at one end facing the central axis of the support rod (2), and the roller structure (31) is installed in the groove. The wheel surface of the roller structure (31) protrudes from the end surface of the slider (32), and the distance between the wheel surface of the roller structure (31) and the support rod (2) is smaller than the distance between the slider (32) and the support arm (33) and the support rod (2).

8. The inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 7, characterized in that: The movable inner support block (3) also includes an elastic member (34), and a plurality of elastic member blocks (8) corresponding to each of the sliders (32) are also mounted on the clamp body (1), and each of the elastic member blocks (8) is directly opposite to the end of the slider (32) away from the roller structure (31); the elastic member (34) is connected between the end of the slider (32) away from the roller structure (31) and the elastic member block (8), and is used to provide thrust for the slider (32) so as to push the slider (32) toward the slider (2) for reset when the support rod (2) moves up and resets.

9. The inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 8, characterized in that: The fixture body (1) is a flat plate-like structure, and each of the linear slide rails (11) passes through different sides of the fixture body (1) and the window. The elastic member block (8) is detachably installed on the side of the fixture body (1) and blocks the end of the linear slide rail (11). The top of the linear slide rail (11) is open to expose the top of the slider (32) for installing the support arm (33). The product installation station (6) includes an annular support portion (61) for placing the watch back cover and a plurality of support legs (62) that jointly support the annular support portion (61). The support arm (33) is L-shaped and is divided into horizontal A fixing portion and a vertical side push portion for cooperating with the inner wall of the back cover of the watch, the fixing portion is stacked and fixed on the top of the slider (32), the side push portion passes through the annular support portion (61) and is higher than the annular support portion (61), the wheel surface of the roller structure (31) is closer to the central axis of the support rod (2) relative to the side push portion, the support leg (62) is fixed to the top of the clamp body (1), and the annular support portion (61) maintains a certain distance from the top of the clamp body (1) under the support of the support leg (62) to allow the fixing portion to move under the drive of the slider (32).

10. The inner support and pressing fixture for processing the contoured surface of the back cover of a watch according to claim 6, characterized in that: The cylinder (7) comprises a cylinder body (71), a cylinder piston rod (72), a cylinder sealing disk (73), a first sealing ring (74), a second sealing ring (75), a cylinder dust ring (76), and a hole retaining ring (77); The cylinder body (71) is installed at the bottom of the fixture body (1) and faces the window. The side wall of the cylinder body (71) is connected to a cylinder joint (711) that communicates with the inside and outside of the cylinder body (71). The cylinder sealing disk (73) is fixedly assembled in the cylinder body (71), and the outer peripheral side wall of the cylinder sealing disk (73) and the inner peripheral side wall of the cylinder body (71) are sealed by the second sealing ring (75). The top of the cylinder sealing disk (73) is sealed by the hole retaining ring. (77) to limit upward movement, the main body of the cylinder piston rod (72) is movably installed in the cylinder body (71) and is limited below the cylinder sealing plate (73), the first sealing ring (74) is sleeved outside the main body of the cylinder piston rod (72), the rod portion of the cylinder piston rod (72) passes through the cylinder sealing plate (73) and is connected to the support rod (2), and a cylinder dust ring (76) is installed between the rod portion of the cylinder piston rod (72) and the cylinder sealing plate (73).

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