Small self-centering clamp
By designing a cylinder-driven gear meshing structure for a small self-centering clamp, the problem of complex three-jaw clamp structure was solved, achieving simple and efficient bearing fixation and low-cost operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGMU TOOLING & HARDWARE (CHANGSHU) CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-15
AI Technical Summary
Existing three-jaw clamps have a complex structure, which makes maintenance inconvenient and costly, and makes it difficult to efficiently fix bearings.
A small self-centering clamp was designed, which achieves synchronous movement of the grippers through a cylinder-driven gear meshing structure, simplifies the internal structure of the clamp, and uses a guide plate to provide a limiting effect.
This achieves a simple and efficient clamping and fixing of bearings, reducing usage costs and improving operational convenience and stability.
Smart Images
Figure CN224239367U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of clamping technology, and in particular relates to a small self-centering clamp. Background Technology
[0002] A fixture is a device used in mechanical manufacturing to fix a workpiece in the correct position for construction or testing. It is also called a clamp. When fixing a bearing, a small self-centering fixture can be used to facilitate the fixing and testing of the bearing.
[0003] Currently, the clamps used to hold and fix bearings on the market are usually three-jaw clamps. The internal structure of traditional three-jaw clamps is relatively complex, which makes the cost of using them relatively high. When the internal structure of the three-jaw clamp is damaged during use, it is also more troublesome to repair and less convenient to use. Utility Model Content
[0004] The purpose of this invention is to provide a small self-centering fixture to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A small self-centering clamp includes a base frame, a cylinder welded to the side of the base frame, one end of the cylinder penetrating the base frame, a first gripper welded to one end of the cylinder, the surface of the first gripper engaging with a first gear, the surface of the first gear engaging with a second gear, the surface of the second gear engaging with a second gripper, the side of the second gripper engaging with a third gear, the surface of the third gear engaging with a fourth gear, the surface of the fourth gear engaging with a third gripper, an outer fixing plate welded to the top of the base frame, a second guide plate welded to the surface of the outer fixing plate, and the top of the third gripper abutting against the bottom of the second guide plate.
[0006] Preferably, a partition is welded to the top of the base frame, the surface of the partition is attached to the outer fixing plate, and the second gear and the third gear are both located inside the partition.
[0007] Preferably, a first mandrel is welded to the surface of the first gear, and the first mandrel passes through the outer fixing plate; a second mandrel is welded to the surface of the second gear, and the second mandrel passes through the outer fixing plate.
[0008] Preferably, a first guide plate is welded to the top of the outer fixing plate, and the bottom of the first guide plate is attached to the first clamping claw.
[0009] Preferably, the outer fixing plate is symmetrically distributed, and the first clamp, the second clamp, and the third clamp are triangularly distributed.
[0010] Preferably, a third mandrel is welded to the surface of the third gear, the third mandrel penetrates the outer fixing plate, and a fourth mandrel is welded to the surface of the fourth gear, the fourth mandrel penetrates the outer fixing plate.
[0011] This utility model discloses a small self-centering clamp with the following advantages: The clamp incorporates a cylinder welded to the side of a base frame, with one end of the cylinder penetrating the base frame. A first gripper is welded to one end of the cylinder, and the surface of the first gripper engages with a first gear. The surface of the first gear engages with a second gear, and the surface of the second gear engages with a second gripper. The side of the second gripper engages with a third gear, and the surface of the third gear engages with a fourth gear. The surface of the fourth gear engages with the third gripper. An outer fixing plate is welded to the top of the base frame, and a second guide plate is welded to the surface of the outer fixing plate. The top of the third gripper rests against the bottom of the second guide plate. When using the clamp, a bearing can be placed between the first, second, and third grippers. Then, the cylinder drives the first gripper to move. When the first gripper moves, the first gear rotates. When the first gear rotates, it drives the second gear to rotate. When the second gear rotates, it drives the second gripper to move. When the second gripper moves, it drives the third gear to rotate. The third gear then drives the fourth gear to rotate, which in turn drives the third gripper to move. At this time, the first, second, and third grippers move synchronously. Under the action of the second guide plate, the third gripper is limited, thereby clamping and fixing the bearing. The internal structure of this device is relatively simple, and it can clamp and fix the bearing very conveniently. It has low operating cost and is very convenient to use. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the partition structure of this utility model;
[0015] Figure 3 This is a schematic diagram of the cylinder structure of this utility model;
[0016] Figure 4 For the present utility model Figure 3 Enlarged view of section A in the middle.
[0017] The markings in the diagram are as follows: 1. Cylinder; 2. Base frame; 3. Outer fixing plate; 4. First guide plate; 5. Second guide plate; 6. First gripper; 7. First gear; 8. Second gear; 9. Second gripper; 10. Third gear; 11. Fourth gear; 12. Third gripper; 13. First spindle; 14. Second spindle; 15. Third spindle; 16. Fourth spindle; 17. Partition plate. Detailed Implementation
[0018] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0019] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.
[0020] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0021] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0022] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0023] To better understand the purpose, structure, and function of this utility model, a small self-centering clamp of this utility model will be described in further detail below with reference to the accompanying drawings.
[0024] like Figure 1-4 As shown, this utility model discloses a small self-centering clamp, including a base frame 2. A cylinder 1 is welded to the side of the base frame 2, one end of the cylinder 1 penetrates the base frame 2, and a first gripper 6 is welded to the other end of the cylinder 1. The surface of the first gripper 6 meshes with a first gear 7, the surface of the first gear 7 meshes with a second gear 8, the surface of the second gear 8 meshes with a second gripper 9, the side of the second gripper 9 meshes with a third gear 10, the surface of the third gear 10 meshes with a fourth gear 11, and the surface of the fourth gear 11 meshes with a third gripper 12. By installing the first gear 7, the second gear 8, the third gear 10, and the fourth gear 11, when the clamp has been used, the bearing can be placed between the first gripper 6, the second gripper 9, and the third gripper 12. Then, the cylinder 1 drives the first gripper 6 to move. When the first gripper 6 moves, the first gear 7 will be rotated. The mechanism rotates as follows: when the first gear 7 rotates, it drives the second gear 8 to rotate; when the second gear 8 rotates, it drives the second gripper 9 to move; when the second gripper 9 moves, it drives the third gear 10 to rotate; at this time, the third gear 10 drives the fourth gear 11 to rotate, which in turn drives the third gripper 12 to move. This allows the first gripper 6, the second gripper 9, and the third gripper 12 to move synchronously, making it very convenient to use. An outer fixing plate 3 is welded to the top of the base frame 2, and a second guide pressure plate 5 is welded to the surface of the outer fixing plate 3. The top of the third gripper 12 is attached to the bottom of the second guide pressure plate 5. By installing the second guide pressure plate 5, the third gripper 12 can be limited, preventing it from disengaging from the fourth gear 11 and improving its stability during use.
[0025] A partition plate 17 is welded to the top of the base frame 2. The surface of the partition plate 17 is attached to the outer fixing plate 3. The second gear 8 and the third gear 10 are both located inside the partition plate 17. By installing the partition plate 17, the first gear 7, the second gear 8, the third gear 10 and the fourth gear 11 can be provided with installation space, which is very convenient to use.
[0026] The first gear 7 has a first spindle 13 welded to its surface, and the first spindle 13 passes through the outer fixing plate 3. The second gear 8 has a second spindle 14 welded to its surface, and the second spindle 14 passes through the outer fixing plate 3. By installing the first spindle 13 and the second spindle 14, the first spindle 13 and the second spindle 14 can respectively provide a positional fixation effect for the first gear 7 and the second gear 8, ensuring the stability of the first gear 7 and the second gear 8 during use.
[0027] The top of the outer fixing plate 3 is welded with a first guide plate 4, and the bottom of the first guide plate 4 is attached to the first gripper 6. By installing the first guide plate 4, the first guide plate 4 can provide a limiting effect for the first gripper 6, so that the first gripper 6 will not disengage from the first gear 7, and the stability of the first gripper 6 is guaranteed during use.
[0028] The outer fixing plate 3 is symmetrically distributed, and the first clamp 6, the second clamp 9 and the third clamp 12 are triangularly distributed. The distribution of the first clamp 6, the second clamp 9 and the third clamp 12 can provide a stable clamping effect for the bearing, and the stability is strong during use.
[0029] The third gear 10 has a third spindle 15 welded to its surface, and the third spindle 15 passes through the outer fixing plate 3. The fourth gear 11 has a fourth spindle 16 welded to its surface, and the fourth spindle 16 passes through the outer fixing plate 3. By installing the third spindle 15 and the fourth spindle 16, the third spindle 15 and the fourth spindle 16 can provide a positional fixation effect for the third gear 10 and the fourth gear 11 respectively, ensuring the stability of the third gear 10 and the fourth gear 11 during use.
[0030] The working principle of this small self-centering clamp is as follows: When using this clamp, the bearing can be placed between the first jaw 6, the second jaw 9, and the third jaw 12. At this time, since the cylinder 1 is welded to the side of the base frame 2, one end of the cylinder 1 passes through the base frame 2, and the first jaw 6 is welded to the other end of the cylinder 1. At the same time, the surface of the first jaw 6 meshes with the first gear 7, and the surface of the first gear 7 meshes with the second gear 8. At this time, the surface of the second gear 8 meshes with the second jaw 9, and the side of the second jaw 9 meshes with the third gear 10. The surface of the third gear 10 meshes with the fourth gear 11, and the surface of the fourth gear 11 meshes with the third jaw 12. An outer fixing plate 3 is welded to the top of the base frame 2, and a second guide plate 5 is welded to the surface of the outer fixing plate 3. At this time, the top of the third jaw 12 is attached to the bottom of the second guide plate 5. At this time, the first spindle 13, the second spindle 14, the third spindle 15, and the fourth spindle 16 can be the first gear. 7. The second gear 8, the third gear 10, and the fourth gear 11 are fixed in position. At this time, the cylinder 1 can drive the first gripper 6 to move. When the first gripper 6 moves, the first gear 7 will rotate. When the first gear 7 rotates, it will drive the second gear 8 to rotate. When the second gear 8 rotates, it will drive the second gripper 9 to move. When the second gripper 9 moves, it will drive the third gear 10 to rotate. At this time, the third gear 10 will drive the fourth gear 11 to rotate, which will drive the third gripper 12 to move. At this time, the first gripper 6, the second gripper 9, and the third gripper 12 can move synchronously. Under the action of the second guide plate 5, the third gripper 12 can be limited, thereby clamping and fixing the bearing. The internal structure of this device is relatively simple, and it can easily clamp and fix the bearing. It has low cost and is very convenient to use.
[0031] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A small self-centering fixture, comprising a base frame (2), characterized in that: A cylinder (1) is welded to the side of the base frame (2). One end of the cylinder (1) passes through the base frame (2). A first gripper (6) is welded to one end of the cylinder (1). The surface of the first gripper (6) meshes with a first gear (7). The surface of the first gear (7) meshes with a second gear (8). The surface of the second gear (8) meshes with a second gripper (9). The side of the second gripper (9) meshes with a third gear (10). The surface of the third gear (10) meshes with a fourth gear (11). The surface of the fourth gear (11) meshes with a third gripper (12). An outer fixing plate (3) is welded to the top of the base frame (2). A second guide plate (5) is welded to the surface of the outer fixing plate (3). The top of the third gripper (12) is attached to the bottom of the second guide plate (5).
2. The miniature self-centering clamp according to claim 1, characterized in that: The base frame (2) is welded to the top of the partition plate (17), the surface of the partition plate (17) is attached to the outer fixing plate (3), and the second gear (8) and the third gear (10) are both located inside the partition plate (17).
3. The small self-centering clamp according to claim 1, characterized in that: The first gear (7) has a first spindle (13) welded to its surface, and the first spindle (13) passes through the outer fixing plate (3). The second gear (8) has a second spindle (14) welded to its surface, and the second spindle (14) passes through the outer fixing plate (3).
4. The small self-centering clamp according to claim 1, characterized in that: The top of the outer fixing plate (3) is welded with a first guide pressure plate (4), and the bottom of the first guide pressure plate (4) is attached to the first clamp (6).
5. The small self-centering fixture according to claim 1, characterized in that: The external fixing plate (3) is symmetrically distributed, and the first clamp (6), the second clamp (9) and the third clamp (12) are triangularly distributed.
6. The miniature self-centering clamp according to claim 1, characterized in that: The third gear (10) has a third spindle (15) welded to its surface, and the third spindle (15) passes through the outer fixing plate (3). The fourth gear (11) has a fourth spindle (16) welded to its surface, and the fourth spindle (16) passes through the outer fixing plate (3).