Small space compacting device based on avoidance of loading and unloading

Abstract

This utility model relates to a small-space clamping device based on obstacle avoidance during loading and unloading, and pertains to the field of tooling and fixtures. The clamping force of this technical solution is provided by a linear hydraulic cylinder located outside the workpiece and machining range, completely eliminating the limitations of the workpiece's internal space. It can stably output sufficient clamping force to meet cutting requirements, ensuring normal workpiece production. In the released state, the gripper blocks can completely retract into the positioning seat, completely avoiding interference with workpiece loading and unloading, significantly improving operational convenience. Simultaneously, this structure can synchronously drive two gripper blocks to achieve linked clamping using a single linear hydraulic cylinder, not only reducing the number of hydraulic cylinders used to lower costs but also effectively avoiding the problem of limited cylinder volume, allowing a large hydraulic cylinder to simultaneously provide sufficient clamping force to both pressure points. Furthermore, compared to traditional hinge mechanisms, its moving components are all built into the positioning seat, effectively preventing chip jamming.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a small-space clamping device based on avoiding material loading and unloading. Background Technology

[0002] In the field of hydraulic clamps, the current mainstream clamping methods are mainly divided into two categories: First, directly using standardized hydraulic cylinders from various brands to achieve clamping operations. Although this method is technically mature, the fixed structure of the hydraulic cylinder results in insufficient flexibility in the overall spatial layout of the clamp, making it difficult to adapt to complex and ever-changing installation scenarios. Second, using hydraulic cylinders in conjunction with connecting rod hinge structures or guide rod pull-down structures to complete the clamping action. Although this method is somewhat optimized in terms of spatial adaptability compared to the former, it still has significant limitations. Especially when the actual working conditions simultaneously meet the three conditions of high clamping force requirements, narrow clamping space, and the need to avoid interference during loading and unloading, neither of the existing clamping structures can meet all the requirements, creating a gap in technological application.

[0003] Furthermore, the problems arising from the aforementioned technological gaps are even more pronounced in the design of fixtures for specific workpieces. Some types of workpieces can only be clamped using an internal stepped structure, and because the machining process generates significant cutting forces, higher demands are placed on the force output of the clamping structure. However, these workpieces are typically small in size, and existing hydraulic cylinders either cannot be installed within the limited space inside the workpiece, or, while meeting the space requirements after installation, cannot provide sufficient clamping force, while also needing to avoid interfering with workpiece loading and unloading operations. This dilemma of balancing space, pressure, and operational compatibility presents a significant challenge to fixture design, and it is precisely based on the need to solve this practical problem that this utility model clamping structure was developed. Summary of the Invention

[0004] The purpose of this invention is to provide a small-space clamping device based on avoiding material loading and unloading, so as to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A small-space clamping device based on obstacle avoidance during loading and unloading includes: The positioning seat is closed by a cover plate; A linear hydraulic cylinder is located outside the positioning seat, and a push rod mounted on its power output end extends from the first end of the positioning seat into the interior of the positioning seat. A hinge block, located inside the positioning seat, has its first end hinged to the top rod; and The gripper blocks have their first ends hinged to the second end of the hinge block. The second ends of the two gripper blocks can retract towards each other inside the positioning seat or unfold away from each other outside the positioning seat. When the second end of the gripper block is in a state of retraction towards each other or expansion towards each other, it can move along the limiting groove in the positioning seat.

[0006] In one possible implementation, the second ends of both gripper blocks are slidably connected to the limiting groove via limiting posts, and the limiting groove is perpendicular to the driving direction of the linear cylinder.

[0007] In one possible implementation, the small-space clamping device based on avoidance of loading and unloading further includes: The guide key installed inside the positioning seat and the guide block installed inside the cover plate form the limiting groove and the guide opening for the second end of the gripper block to extend to the outside of the positioning seat.

[0008] In one possible implementation, the first ends of both gripper blocks are hinged to the second ends of the hinge block via hinge pins.

[0009] In one possible implementation, both ends of the hinged column are provided with axial elastic retaining rings.

[0010] In one possible implementation, the first end of the hinge block is hinged to the top rod via a hinge shaft.

[0011] In one possible implementation, a guide seat is provided at the first end of the positioning seat, and the push rod extends into the interior of the positioning seat through the guide seat.

[0012] In one possible implementation, the power output end of the linear cylinder is connected to the push rod via a pull stud.

[0013] In one possible implementation, an oil-free bushing and a dustproof ring are also provided on the inner side of the telescopic port at the power output end of the linear hydraulic cylinder.

[0014] In one possible implementation, baffles are provided on both sides of the positioning seat at the two guide ports.

[0015] The beneficial effects of the technical solution provided by this utility model include at least the following: The clamping force of this technical solution is provided by a linear hydraulic cylinder located outside the workpiece and machining range, completely eliminating the limitations of the internal space of the workpiece. It can stably output sufficient clamping force to meet the cutting requirements and ensure normal production of the workpiece. In the released state, the gripper blocks can be completely retracted into the positioning seat, which can completely avoid interference with the loading and unloading of the workpiece and significantly improve the convenience of operation. At the same time, this structure can drive two gripper blocks simultaneously to achieve linkage clamping with a single linear hydraulic cylinder, which not only reduces the number of hydraulic cylinders used to reduce costs, but also effectively avoids the problem of limited hydraulic cylinder volume, allowing a large hydraulic cylinder to provide sufficient clamping force for both pressure points at the same time. In addition, compared with traditional hinge mechanisms, its moving components are all built into the positioning seat, which can effectively prevent iron filings from getting stuck. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0017] Figure 1 This illustration shows an isometric view of a small-space clamping device based on avoidance loading and unloading provided in an exemplary embodiment of the present invention.

[0018] Figure 2 This illustration shows an axial side view of the small-space pressing device based on avoidance loading and unloading provided by an exemplary embodiment of the present invention, after the cover plate is hidden.

[0019] Figure 3 The diagram shows a cross-sectional view of a small-space clamping device based on avoidance loading and unloading provided in an exemplary embodiment of the present invention in the unloading state.

[0020] Figure 4 The diagram shows a cross-sectional view of a small-space clamping device based on avoidance loading and unloading, provided by an exemplary embodiment of the present invention, in a clamping processing state.

[0021] In the picture: 1. Positioning seat; 2. Cover plate; 3. Linear hydraulic cylinder; 4. Top rod; 5. Hinge block; 6. Gripper block; 7. Limiting groove; 8. Limiting post; 9. Guide keys; 10. Guide block; 11. Guide port; 12. Hinged column; 13. Shaft uses elastic retaining ring; 14. Hinge shaft; 15. Guide seat; 16. Rivets; 17. Telescopic port; 18. Baffle; 19. Workpiece; 20. Inner steps; 21. Support surface. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings of this utility model, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] First of all, it is worth mentioning that, see Figures 1 to 4 The workpiece 19 can only be clamped by the inner step 20. The support surface 21 of the workpiece 19 is supported by an external support structure (not shown in the figure). Because a large cutting force will be generated during the processing, higher requirements are placed on the force output of the clamping structure.

[0026] Figure 1 This diagram shows an isometric view of a small-space clamping device based on avoidance during loading and unloading, according to an exemplary embodiment of the present invention. Figure 2This diagram shows an axial side view of a small-space clamping device based on avoidance loading and unloading provided by an exemplary embodiment of the present invention, after the cover plate is hidden. The small-space clamping device based on avoidance loading and unloading includes: a positioning seat 1, which is covered by a cover plate 2; a linear hydraulic cylinder 3, which is located outside the positioning seat 1, and a push rod 4 installed on its power output end extends into the interior of the positioning seat 1 from the first end of the positioning seat 1; a hinge block 5, which is located inside the positioning seat 1, and its first end is hinged to the push rod 4; and two gripper blocks 6, the first ends of which are both hinged to the second ends of the hinge block 5, and the second ends of the two gripper blocks 6 can retract towards each other inside the positioning seat 1 or unfold away from each other outside the positioning seat 1; wherein, when the second ends of the gripper blocks 6 are in the state of retracting towards each other or unfolding away from each other, they can move along the limiting groove 7 in the positioning seat 1.

[0027] In this embodiment, the positioning seat 1 and the cover plate 2 form an installation space for the internal components; the linear hydraulic cylinder 3 serves as a power source, driving the push rod 4 to extend into the positioning seat 1 and transmit power to the hinge block 5; the hinge block 5 receives the power of the push rod 4 within the positioning seat 1 and drives the two gripper blocks 6 to move through the hinge structure; the gripper blocks 6, through their hinge relationship with the hinge block 5, can retract towards each other or unfold away from each other, adapting to small space operation; the limiting groove 7 limits the movement trajectory of the gripper blocks 6, ensuring stable and precise retraction and unfolding actions. The overall structure not only meets the clamping requirements of small spaces but also allows the workpiece 19 to be unloaded and loaded by the gripper blocks 6 being able to retract inside the positioning seat 1.

[0028] For details, please refer to Figure 2 and Figure 3 The second ends of the two gripper blocks 6 are slidably connected to the limiting groove 7 via the limiting post 8, and the limiting groove 7 is perpendicular to the driving direction of the linear cylinder 3.

[0029] In this embodiment, the limiting post 8 can reduce the sliding friction of the gripper block 6, making the movement smoother. The limiting groove 7 is perpendicular to the driving direction of the linear cylinder 3, which can accurately limit the movement trajectory of the gripper block 6, ensuring that it can stably achieve the opposite contraction to release the workpiece 19 or the opposite unfolding to press the workpiece 19, which is suitable for small space operation requirements.

[0030] For more details, see [link to relevant documentation]. Figure 1 and Figure 2 The small space clamping device based on avoiding loading and unloading also includes: a guide key 9 installed inside the positioning seat 1, and a guide block 10 installed inside the cover plate 2. The guide key 9 and the guide block 10 form a limiting groove 7, and a guide port 11 for the second end of the clamping claw block 6 to extend to the outside of the positioning seat 1.

[0031] Specifically, see Figure 2 , Figure 3 and Figure 4The first ends of both gripper blocks 6 are hinged to the second ends of hinge block 5 via hinge pins 12. The first end of hinge block 5 is hinged to top rod 4 via hinge shaft 14.

[0032] In this embodiment, the first ends of the two gripper blocks 6 are hinged to the second ends of the hinge block 5 via the hinge post 12, which is used to ensure that the gripper blocks 6 can rotate flexibly to achieve contraction or expansion; while the first end of the hinge block 5 is hinged to the push rod 4 via the hinge shaft 14, which can stably transmit the power of the push rod 4 to the hinge block 5 on the one hand, and provide adaptive flexible clamping when there is a height difference between the inner steps 20 on both sides of the workpiece 19, that is, the two gripper blocks 6 are in a clamping state with a height difference.

[0033] More specifically, see Figure 2 Both ends of the hinge column 12 are provided with shaft elastic retaining rings 13.

[0034] In this embodiment, axial elastic retaining rings 13 are provided at both ends of the hinge column 12 to limit the axial movement of the hinge column 12, preventing axial displacement or detachment during device operation due to the hinge rotation of the gripper block 6 and the hinge block 5, ensuring stable connection of the hinge structure and smooth power transmission.

[0035] Further, see Figure 1 and Figure 2 The first end of the positioning seat 1 is provided with a guide seat 15, and the push rod 4 extends into the interior of the positioning seat 1 through the guide seat 15. The power output end of the linear cylinder 3 is connected to the push rod 4 through a pull pin 16. The inner side of the telescopic port 17 of the power output end of the linear cylinder 3 is also provided with an oil-free bushing and a dustproof ring.

[0036] In this embodiment, the guide seat 15 can guide the push rod 4 to smoothly extend into the positioning seat 1; the pull pin 16 can firmly connect the power output end of the linear cylinder 3 and the push rod 4 to ensure power transmission; the oil-free bushing on the inner side of the telescopic port 17 reduces wear, and the dustproof ring prevents impurities from entering, together maintaining the stability of the cylinder drive.

[0037] Furthermore, see Figure 1 Both sides of the positioning seat 1 are provided with baffles 18 at the two guide ports 11.

[0038] In this embodiment, the baffle 18 can prevent external dust, chips and other impurities from entering the interior of the positioning seat 1.

[0039] Next, combined Figure 3 and Figure 4 The working principle of a small-space pressing device based on avoiding material loading and unloading, as described in the embodiments of this utility model, is explained.

[0040] In the initial state, the positioning seat 1 and the cover plate 2 form an installation space. The baffle 18 is set on the outer periphery of the guide port 11 to prevent impurities from entering. The second end of the gripper block 6 is retracted into the positioning seat 1, which does not affect the loading and unloading of the workpiece 19. When it is necessary to press the workpiece 19, the support surface 21 of the workpiece 19 is fitted onto the external support structure (not shown in the figure), and the second end of the positioning seat 1 is located inside the workpiece 19. When the linear cylinder 3 is started, its power output end drives the push rod 4 through the pull pin 16. Under the guidance of the guide seat 15, the push rod 4 smoothly extends into the positioning seat 1. The push rod 4 transmits power to the hinge block 5 through the hinge shaft 14. The hinge block 5 then drives the two gripper blocks 6 through the hinge column 12. At this time, the second end of the gripper block 6 slides along the limiting groove 7 formed by the guide key 9 and the guide block 10 through the limiting post 8, so that the gripper block 6 unfolds in opposite directions and extends out from the guide port 11, pressing the inner step 20 of the workpiece 19. After processing, the linear cylinder 3 reverses its direction, the push rod 4 retracts and drives the hinge block 5 to reset, and the gripper block 6 retracts back into the positioning seat 1 along the limit groove 7 to avoid loading and unloading the workpiece 19.

[0041] In summary, the clamping force of this technical solution is provided by a linear hydraulic cylinder located outside the workpiece and machining range, completely eliminating the limitations of the internal space of the workpiece. It can stably output sufficient clamping force to meet cutting requirements and ensure normal production of the workpiece. In the released state, the gripper blocks can be completely retracted into the positioning seat, which can completely avoid interference with the loading and unloading of the workpiece and significantly improve the convenience of operation. At the same time, this structure can simultaneously drive two gripper blocks to achieve linkage clamping with a single linear hydraulic cylinder, which not only reduces the number of hydraulic cylinders used to reduce costs, but also effectively avoids the problem of limited hydraulic cylinder volume, allowing a large hydraulic cylinder to provide sufficient clamping force for both pressure points at the same time. In addition, compared with traditional hinge mechanisms, its moving components are all built into the positioning seat, which can effectively prevent iron filings from getting stuck.

[0042] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A compact device for small spaces based on the avoidance of loading and unloading, characterized by, include: The positioning seat (1) is covered by a cover plate (2); A linear hydraulic cylinder (3) is located outside the positioning seat (1), and a push rod (4) installed on its power output end extends from the first end of the positioning seat (1) into the interior of the positioning seat (1). A hinge block (5), located inside the positioning seat (1), has its first end hinged to the top rod (4); and The first ends of the two gripper blocks (6) are hinged to the second ends of the hinge block (5). The second ends of the two gripper blocks (6) can retract towards each other inside the positioning seat (1) or unfold away from each other outside the positioning seat (1). When the second end of the gripper block (6) is in a state of retraction or expansion, it can move along the limiting groove (7) in the positioning seat (1).

2. The compacting device for small spaces based on the avoidance of the upper and lower loading according to claim 1, characterized in that, The second ends of the two gripper blocks (6) are slidably connected to the limiting groove (7) via the limiting post (8), and the limiting groove (7) is perpendicular to the driving direction of the linear cylinder (3).

3. The compacting device based on the small space of the upper and lower material loading avoidance according to claim 2, characterized in that, The small-space clamping device based on avoidance loading and unloading also includes: The guide key (9) installed inside the positioning seat (1) and the guide block (10) installed inside the cover plate (2) form the limiting groove (7) and the guide port (11) for the second end of the gripper block (6) to extend to the outside of the positioning seat (1).

4. The compacting device based on the small space of the upper and lower material loading avoidance according to claim 1, characterized in that, The first ends of both gripper blocks (6) are hinged to the second ends of the hinge block (5) via hinge pins (12).

5. The compacting device based on the small space of the upper and lower material loading avoidance according to claim 4, characterized in that, Both ends of the hinged column (12) are provided with shaft elastic retaining rings (13).

6. The compact device based on the small space of the upper and lower material avoiding feeding according to claim 1, characterized in that, The first end of the hinge block (5) is hinged to the top rod (4) via the hinge shaft (14).

7. The compact device based on the small space of the upper and lower material avoiding feeding according to claim 1, characterized in that, The first end of the positioning seat (1) is provided with a guide seat (15), and the top rod (4) extends into the interior of the positioning seat (1) through the guide seat (15).

8. The compact device based on the small space of the upper and lower material avoiding feeding according to claim 1, characterized in that, The power output end of the linear cylinder (3) is connected to the push rod (4) via a pull stud (16).

9. The compact device based on the small space of the upper and lower material avoiding feeding according to claim 1, characterized in that, The inner side of the telescopic port (17) at the power output end of the linear hydraulic cylinder (3) is also provided with an oil-free bushing and a dustproof ring.

10. The compact device for small space based on the avoidance of the up and down feeding according to claim 3, characterized by, The positioning seat (1) has baffles (18) on both sides at the two guide ports (11).

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