Internal pressure mechanism for workpiece

Abstract

The utility model belongs to product processing technical field discloses a kind of inner pressure mechanism of workpiece, comprising: mobile part, the mobile part is used to move in preset direction;Pressing part, the pressing part is used to press workpiece, the pressing part is movably connected with the mobile part, and the pressing part is equipped with mobile slot;Guide part, the guide part has fixed position in three-dimensional space, the guide part is arranged in the mobile slot, and the guide part is movable relative to the mobile slot, and with the mobile part driving the pressing part moves in the preset direction, the moving direction of the relative movement path formed by the guide part along the mobile slot is away from the workpiece.The utility model solves the problem that the double needs of stable clamping and convenient taking and placing cannot be considered in prior art.

Description

Technical Field

[0001] This utility model belongs to the field of product processing technology, and specifically relates to an internal pressure mechanism for a workpiece. Background Technology

[0002] In the field of product processing and manufacturing, clamping mechanisms are one of the core components for ensuring product processing accuracy and improving production efficiency. They require clamping schemes designed to suit the product's structural characteristics to achieve stable product positioning. Currently, most mainstream clamping methods in the industry are based on the product's external shape, using clamping claws, positioning blocks, and other structures to conform to the product's outer surface, forming a reliable clamping grip. However, as the manufacturing industry develops towards higher precision and complexity, more and more products, due to special design requirements, exhibit shapes that cannot meet clamping conditions. Examples include products with irregular curved surfaces, thin-walled, easily deformable structures, or surfaces requiring high-precision machining and where clamping marks are not permitted. In these situations, traditional shape-based clamping solutions are completely unsuitable.

[0003] To address the aforementioned issues, the industry has gradually explored designing clamping solutions based on the unique internal features of the product. This involves using specific internal structures (such as internal positioning holes, reinforcing ribs, and stepped surfaces) to achieve product positioning and clamping, thus avoiding dependence on external shape. However, in practical applications, the core challenge of internal clamping solutions lies in the space constraints during product handling. To achieve stable clamping, the actuators of the internal clamping mechanism must penetrate deep into the product and closely engage with its internal features. In this engagement state, the actuators often occupy crucial space required for product handling, preventing the product from being smoothly placed into the clamping station or removed after processing. If a detachable or extendable internal clamping mechanism is designed to avoid this space constraints, the mechanism becomes complex, assembly accuracy is difficult to guarantee, and clamping stability is significantly reduced, easily leading to product displacement during processing, thus affecting processing accuracy and even causing product scrap.

[0004] Currently, existing solutions for internal clamping either fail to meet product loading and unloading needs due to insufficient space in the design, or suffer from reduced clamping reliability due to complex mechanisms, making it difficult to balance the dual requirements of stable clamping and convenient loading and unloading. Utility Model Content

[0005] This utility model provides an internal pressure mechanism for a workpiece to solve the problem in the prior art that it is difficult to simultaneously meet the dual requirements of stable clamping and convenient handling.

[0006] To solve the above-mentioned technical problems, this utility model provides an internal pressure mechanism for a workpiece, comprising: The movable part is used to move in a preset direction; The clamping part is used to clamp the workpiece, and the clamping part is movably connected to the moving part. The clamping part is provided with a moving groove. The guide part has a fixed position in three-dimensional space. The guide part is disposed in the moving groove and is movable relative to the moving groove. As the moving part drives the clamping part to move in the preset direction, the guide part moves away from the workpiece along the moving direction of the relative moving path formed by the moving groove.

[0007] Optionally, the slot width is consistent at any point of the moving groove, and the dimension of the guide part in the slot width direction matches the slot width of the moving groove.

[0008] Optionally, in a direction opposite to the preset direction, the opening of the moving groove gradually shifts toward a direction closer to the workpiece.

[0009] Optionally, the guide portion is cylindrical, and the cross surface between the guide portion and the moving groove is curved.

[0010] Optionally, the end of the clamping portion facing the workpiece protrudes towards the workpiece, forming a clamping end for clamping the workpiece.

[0011] Optionally, the internal pressure mechanism of the workpiece further includes a limiting part, which is fixedly connected to the moving part. The limiting part is provided with a limiting hole, and the clamping part is movably connected to the limiting part in the limiting hole. The limiting hole is used to limit the clamping part in a direction perpendicular to the moving direction of the clamping part.

[0012] Optionally, the limiting part is perpendicular to the moving part.

[0013] Optionally, the internal pressure mechanism of the workpiece further includes a main support portion, which is used to support the workpiece. The main support portion has a receiving cavity inside, and the guide portion is disposed in the receiving cavity and fixedly connected to the main support portion.

[0014] Optionally, the receiving cavity includes a first limiting cavity, the movable part is at least partially located in the first limiting cavity, the clamping part is at least partially located in the first limiting cavity, and in a first direction perpendicular to the preset direction, the maximum size of the clamping part and the movable part matches the size of the first limiting cavity.

[0015] Optionally, the receiving cavity further includes a second limiting cavity, and the size of the second limiting cavity matches the size of the clamping portion in the first direction.

[0016] Compared with the prior art, the internal pressure mechanism for a workpiece provided by this utility model has the following advantages: When the moving part of this invention drives the clamping part to move along a preset direction, the fixed guide part will slide relative to the moving groove of the clamping part, and the sliding path is always away from the workpiece. This trajectory design directly determines the switching between clamping and avoidance. When the moving part drives the clamping part to move closer to the workpiece, the relative position of the guide part in the moving groove will guide the clamping part to penetrate deeper into the workpiece. The clamping part can fit tightly with the inside of the workpiece, and the entire mechanism has no disassembly or telescopic structure. Clamping is achieved only through rigid linkage, ensuring assembly accuracy and clamping stability, and avoiding the problem of clamping failure caused by complex mechanisms. When it is necessary to remove or place the workpiece, the moving part drives the clamping part to move away from the workpiece. At this time, the fixed guide part will slide along the moving groove of the clamping part, and the sliding path is designed to move away from the workpiece. The relative sliding of the guide part will force the clamping part to withdraw from the inside of the workpiece, actively freeing up the key space required for workpiece removal and placement, and avoiding the problem of the actuating parts occupying the removal and placement space, thus preventing the workpiece from being removed. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model, not all embodiments. For those skilled in the art, other drawings obtained from these drawings without creative effort are all within the protection scope of this utility model.

[0018] Figure 1 This is a perspective view of the internal pressure mechanism of the workpiece provided in an embodiment of the present invention in a certain direction.

[0019] Figure 2 This is a perspective view of the internal pressure mechanism of the workpiece provided in this embodiment of the utility model from another direction.

[0020] Figure 3 and Figure 4 This is a partial exploded view of the internal pressure mechanism of the workpiece provided in an embodiment of this utility model in different directions.

[0021] Figure 5 This is a perspective view of the limiting part provided in an embodiment of the present utility model.

[0022] Figures 6 to 8 This is a perspective view of the main support portion provided in an embodiment of the present invention from different directions.

[0023] Figure 9 yes Figure 8 Sectional view in the AA direction.

[0024] Figure 10 This is a perspective view of the internal pressure mechanism of the workpiece provided in this embodiment of the utility model in another direction.

[0025] Figure 11 yes Figure 10 Sectional view in the BB direction.

[0026] Drawing number explanation: 100-moving part, 200-clamping part, 210-moving groove, 220-clamping end, 300-guide part, 400-workpiece, 500-limiting part, 510-limiting hole, 600-main body support part, 610-accommodating cavity, 611-first limiting cavity, 612-second limiting cavity, 700-pad. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0028] To make the description of this disclosure more detailed and complete, illustrative descriptions of the implementation methods and specific embodiments of this utility model are provided below; however, this is not the only form of implementing or applying the specific embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0030] In addition, in the description of the embodiments of this utility model, "multiple" refers to two or more, and other quantifiers are similarly understood. The preferred embodiments described herein are only for illustration and explanation of this utility model and are not intended to limit this utility model. Furthermore, in the absence of conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other.

[0031] like Figure 1 and Figure 2 The image shown is a three-dimensional view of an internal pressure mechanism for a workpiece in different directions. Figure 3 The image shown is a partial exploded view of the internal pressure structure of the workpiece. Figures 1 to 3As shown, the internal pressure mechanism includes a moving part 100, a clamping part 200, and a guiding part 300.

[0032] The moving part 100 is used to move in a preset direction. The moving part 100 may be a linear drive element such as a cylinder, electric push rod, or cam mechanism, and can move in a preset direction such as vertical, horizontal, or inclined.

[0033] The clamping part 200 is used to clamp the workpiece 400. The clamping part 200 can be designed in various structures such as hook-shaped, boss-shaped, and tooth-shaped to adapt to different workpieces 400. In some embodiments of this utility model, one end of the clamping part 200 facing the workpiece 400 protrudes towards the workpiece 400, forming a clamping end 220 on the clamping part 200 for clamping the workpiece 400. Specifically, in order to adapt to different inner hole structures of workpieces 400, the end of the clamping part 200 facing the workpiece 400 can protrude towards the workpiece 400 through various structures such as an annular boss (adapting to annular grooves in cylindrical inner holes, such as hydraulic valve cores), serrated protrusions (enhancing the friction of rough workpieces 400, such as wooden workpieces 400), and stepped bosses (adapting to multi-step inner holes, such as stepped bushings) to form the clamping end 220. For example, an annular boss can reduce the axial positioning accuracy of hydraulic valve cores; serrated protrusions can prevent slippage during processing of wooden workpieces 400. This design covers workpieces 400 made of materials such as metal, plastic, and wood, and with structures such as annular grooves, stepped holes, and rough inner holes. The clamping part 200 is movably connected to the moving part 100, and the clamping part 200 has a moving groove 210. As a specific example, such as Figure 1 As shown, when the workpiece 400 has a ring structure, a clamping part 200 can be provided at both ends of the inner hole of the workpiece 400 to make the clamping of the workpiece 400 more stable.

[0034] Figure 4 The image shown is a partially exploded view of the internal pressure mechanism of the workpiece provided in an embodiment of this utility model from another angle. Figure 5 The image shown is a perspective view of a limiting part 500 provided in an embodiment of the present invention. In some embodiments of the present invention, such as... Figure 4 and Figure 5As shown, the internal pressing mechanism of workpiece 400 also includes a limiting part 500, which is fixedly connected to the moving part 100. The limiting part 500 is provided with a limiting hole 510, and the clamping part 200 is movably connected to the limiting part 500 in the limiting hole 510. The limiting hole 510 is used to limit the movement range of the clamping part 200 to within the preset direction of the movement path and the relative movement path. It can be understood that by providing the limiting hole 510, the clamping part 200 can be limited to the limiting hole 510, while ensuring that the clamping part 200 is movably connected to the limiting part 500 in the limiting hole 510. This ensures that when the clamping part 200 moves towards or away from workpiece 400, it will not move in other directions, thus avoiding unstable clamping when the clamping part 200 moves in other directions. As a specific example, such as... Figure 3 As shown, when the workpiece 400 is provided with a clamping part 200 at both ends, the two clamping parts 200 can be respectively provided at both ends of the limiting part 500, so that when the clamping part 200 is moved by the moving part 100, the limiting part 500 can move the clamping part 200 more stably.

[0035] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the limiting part 500 is perpendicular to the moving part 100. It can be understood that the two are spatially perpendicular. This perpendicular design ensures that the limiting direction and the moving direction are completely orthogonal, avoiding interference and ensuring a small coaxiality error between the workpiece 400 axis and the machining axis.

[0036] like Figure 3 and Figure 4 As shown, the guide part 300 has a fixed position in three-dimensional space. The guide part 300 is disposed in the moving groove 210 and is movable relative to the moving groove 210. As the moving part 100 drives the clamping part 200 to move in the preset direction, the guide part 300 moves away from the workpiece clamping position along the moving direction of the relative moving path formed by the moving groove 210.

[0037] In some embodiments of this utility model, such as Figure 3 and Figure 4As shown, along the movement direction of the relative movement path, the slot width of the moving groove 210 matches the dimension of the guide part 300 in the slot width direction. Since the slot width of the moving groove 210 matches the dimension of the guide part 300 in the slot width direction, it can be understood that the shape of the moving groove 210 depends on the shape of the guide part 300. For example, if the guide part 300 is cylindrical, and the inner wall of the moving groove 210 is tangent to the curved surface of the guide part 300, then the shape of the moving groove 210 at the beginning and end of the relative movement path can be semi-circular, and in the middle of the relative movement path it can be rectangular or square. The radius of the semi-circle and the width of the rectangle can be determined with reference to the specific dimensions of the guide part 300, and the length of the rectangle can be determined with reference to the relative movement distance of the guide part 300. This design breaks through the single form of cylinder and circular hole, allowing for flexible selection according to load and precision requirements, and can be applied to the fixing of inner holes in everything from lightweight electronic components to heavy-duty equipment. As a specific example, the moving slot 210 can be an elongated through hole. This equal width fit ensures that the guide part 300 slides in the slot without any wobble, maintaining smooth movement even in high-frequency clamping scenarios on the production line.

[0038] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the guide portion 300 is cylindrical, and the cross-section of the guide portion 300 and the moving groove 210 is curved. It can be understood that this arrangement results in a cylindrical and elongated hole fit between the guide portion 300 and the moving groove 210, leading to line contact during sliding and significantly reducing friction compared to a prismatic fit.

[0039] In some embodiments of this utility model, such as Figure 3 and Figure 4As shown, in the direction opposite to the preset direction, the opening of the moving groove 210 gradually shifts towards the workpiece 400. Specifically, in the direction opposite to the preset direction, the shift of the opening of the moving groove 210 can take the form of an arc-shaped trajectory (smooth movement, suitable for fragile workpieces 400, such as ceramic parts), a zigzag trajectory (segmented opening, suitable for multi-segment clamping, such as multi-cavity molds), or a spiral trajectory (increased stroke, suitable for deep-hole workpieces 400, such as long pipes). For example, an arc-shaped trajectory ensures impact-free clamping of thin-walled workpieces 400; a spiral trajectory provides full-length inner hole support for deep-hole pipes. This design covers internal pressure scenarios ranging from shallow-hole small workpieces 400 to deep-hole large workpieces 400. Thus, as the moving part 100 moves along a preset direction (assuming the preset direction is vertically upward), the opening of the moving groove 210 gradually shifts away from the workpiece 400, causing the moving part 100 to rise and the clamping part 200 to retract inward; when the moving part 100 descends, the clamping part 200 expands outward; and when the moving part 100 moves downward, the guide part 300 moves relative to it along the inclined path of the moving groove 210, forcing the clamping part 200 to open outward. This offset design can be extended to arc-shaped trajectories (suitable for fragile workpieces 400 such as ceramics), spiral trajectories (suitable for deep-hole pipe fittings), etc., so that the opening amplitude of the clamping part 200 is linearly related to the moving distance of the moving part 100, achieving stepless adjustment of the clamping force.

[0040] Figures 6 to 8 Perspective views of the main support portion 600 provided in different directions for embodiments of this utility model. Figure 9 for Figure 8 A cross-sectional view along the AA direction. In some embodiments of this invention, such as... Figure 1 , Figure 2 as well as Figures 6 to 9 As shown, the internal pressure mechanism of the workpiece also includes a main support portion 600, which supports the workpiece 400, such as the workpiece 400 being supported on the upper surface of the main support portion 600. The main support portion 600 has a receiving cavity 610 inside, and the guide portion 300 is disposed in the receiving cavity 610 and fixedly connected to the main support portion 600. Optionally, as... Figures 2 to 4 as well as Figure 11 As shown, in order to enable the main support 600 to better form the accommodating space of each structure and make the internal pressure mechanism of the workpiece more stable, a pad 700 can be set at the end of the main support 600 away from the workpiece 400.

[0041] Figure 10 A perspective view of the internal pressure mechanism of the workpiece provided in an embodiment of this utility model, in a certain direction. Figure 11 for Figure 10 A cross-sectional view in the BB direction. In some embodiments of this invention, such as... Figures 7-9 , Figure 10 as well as Figure 11 As shown, the receiving cavity 610 includes a first limiting cavity 611. The moving part 100 is at least partially located in the first limiting cavity 611, and the clamping part 200 is at least partially located in the first limiting cavity 611. In a first direction perpendicular to the preset direction, the maximum dimensions of the clamping part 200 and the moving part 100 match the dimensions of the first limiting cavity 611. It can be understood that the first limiting cavity 611 simultaneously constrains the displacement of the moving part 100 and the clamping part 200 in the first direction, and their maximum dimensions in the first direction match the dimensions of the first limiting cavity 611 (e.g., the gap is less than or equal to a first preset threshold).

[0042] In some embodiments of this utility model, such as Figure 6 , Figure 8 and Figure 9 As shown, the receiving cavity 610 further includes a second limiting cavity 612, and the size of the second limiting cavity 612 matches the size of the clamping part 200 in the first direction. It can be understood that the second limiting cavity 612 is provided with a high-precision section (the gap is less than or equal to a second preset threshold) in the clamping end 220 region of the clamping part 200 to ensure that the positioning error of the precision workpiece 400 is sufficiently small.

[0043] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

[0044] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An internal pressure mechanism for a workpiece, characterized in that, include: The movable part is used to move in a preset direction; The clamping part is used to clamp the workpiece, and the clamping part is movably connected to the moving part. The clamping part is provided with a moving groove. The guide part has a fixed position in three-dimensional space. The guide part is disposed in the moving groove. The guide part is movable relative to the moving groove. As the moving part drives the clamping part to move in the preset direction, the guide part moves away from the workpiece clamping position along the moving path formed by the moving groove.

2. The internal pressure mechanism for the workpiece according to claim 1, characterized in that, Along the movement direction of the relative movement path, the slot width of the moving groove matches the dimension of the guide portion in the slot width direction.

3. The internal pressure mechanism for the workpiece according to claim 2, characterized in that, In a direction opposite to the preset direction, the opening of the moving groove gradually shifts toward the direction closer to the workpiece.

4. The internal pressure mechanism for the workpiece according to claim 2, characterized in that, The guide part is cylindrical, and the cross surface between the guide part and the moving groove is curved.

5. The internal pressure mechanism for the workpiece according to claim 1, characterized in that, The end of the clamping portion facing the workpiece protrudes towards the workpiece, forming the clamping end of the clamping portion for clamping the workpiece.

6. The internal pressure mechanism for the workpiece according to claim 1, characterized in that, It also includes a limiting part, which is fixedly connected to the moving part. The limiting part is provided with a limiting hole, and the clamping part is movably connected to the limiting part in the limiting hole. The limiting hole is used to limit the movement range of the clamping part to be within the movement path in the preset direction and the relative movement path.

7. The internal pressure mechanism for the workpiece according to claim 6, characterized in that, The limiting part is perpendicular to the moving part.

8. The internal pressure mechanism for the workpiece according to claim 1, characterized in that, It also includes a main support part, which is used to support the workpiece. The main support part has a receiving cavity inside, and the guide part is disposed in the receiving cavity and is fixedly connected to the main support part.

9. The internal pressure mechanism for the workpiece according to claim 8, characterized in that, The receiving cavity includes a first limiting cavity, the movable part is at least partially located in the first limiting cavity, the clamping part is at least partially located in the first limiting cavity, and in a first direction perpendicular to the preset direction, the maximum size of the clamping part and the movable part matches the size of the first limiting cavity.

10. The internal pressure mechanism for the workpiece according to claim 9, characterized in that, The receiving cavity further includes a second limiting cavity, and the size of the second limiting cavity matches the size of the clamping part in the first direction.

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