Self-adaptive fastener clamp

Abstract

The utility model provides a self-adaptive fastener clamp, which relates to the technical field of fastener clamps and comprises a frame, a worktable is fixedly mounted at the upper end of the frame, a plurality of clamping mechanisms for clamping and fixing fastener bodies are arranged on the worktable in a rectangular array, and each clamping mechanism is connected with an adjusting mechanism. The adjusting mechanisms in one row are connected with a driving shaft, and each driving shaft is connected with a driving motor. The clamping device can adapt to fastener bodies of different sizes and shapes through the adjusting mechanism, the clamping force can be adjusted according to needs, the clamp does not need to be replaced frequently, the production cost is reduced, the die replacement time is shortened, and the situation that the fastener is damaged due to the too large clamping force or the fastener is loosened during machining due to the too small clamping force is avoided. And through the clamping mechanism, stable clamping of fastener bodies of different specifications is achieved, it is guaranteed that the fasteners cannot move in the machining process, and the machining precision is guaranteed.

Description

Technical Field

[0001] This utility model mainly relates to the field of fastener clamp technology, specifically to an adaptive fastener clamp. Background Technology

[0002] In the field of machining, the clamping and positioning of fasteners is a crucial starting point in the machining process, and its accuracy and efficiency directly affect product quality and production efficiency. As the manufacturing industry continues to move towards automation and intelligence, the technical bottlenecks of traditional fastener fixtures are becoming increasingly prominent.

[0003] Traditional fastener fixtures mostly employ fixed clamping structures. This rigid design requires the separate design and manufacture of custom fixtures for fasteners of different specifications and shapes, such as bolts, nuts, and rivets. Taking automotive parts manufacturing as an example, the engine assembly process alone involves dozens of fastener specifications. Companies need to stock a large number of different types of fixtures, which not only significantly increases the design, manufacturing, and warehousing costs of fixtures but also occupies a large amount of production space. Furthermore, when changing fixtures, operators need to stop the machine to disassemble, install, and adjust them. A single fixture change often takes several hours or even longer, greatly reducing equipment utilization and production efficiency, making it difficult to meet the flexible production needs of modern manufacturing industries for small batches and multiple varieties.

[0004] Meanwhile, some existing fixtures have significant defects in clamping performance. Due to unreasonable structural design or material limitations, they are unable to withstand external forces such as cutting forces and vibrations during processing, leading to slight displacement or loosening of fasteners. This unstable clamping can easily cause dimensional deviations and substandard surface roughness in the machining of precision parts, such as aerospace engine components and high-end medical device parts, seriously affecting product accuracy and quality. In mass production scenarios, the increased defect rate not only wastes raw materials but also delays delivery cycles, damaging the company's reputation and market competitiveness. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model:

[0006] This invention provides an adaptive fastener clamp to solve the technical problems existing in the background art.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: an adaptive fastener clamp, including a frame, a worktable fixedly mounted on the upper end of the frame, and a plurality of clamping mechanisms for clamping and fixing fastener bodies arranged in a rectangular array on the worktable. Each clamping mechanism is connected to an adjustment mechanism, and each row of adjustment mechanisms is connected to a drive shaft. Each drive shaft is connected to a drive motor.

[0009] Preferably, the clamping mechanism includes a placement platform, a placement groove for placing the fastener body is provided at the center of the placement platform, and three clamping claws are equally spaced on the outer wall of the placement platform, the three clamping claws clamping the fastener body placed in the placement groove.

[0010] Preferably, three mounting seats are fixedly provided on the outer wall of the placement platform, and a pin is fixedly installed in the mounting seat. The middle section of the clamping claw is rotatably mounted on the pin, and a torsion spring is provided on the pin.

[0011] Preferably, a lifting block is slidably mounted on the lower end of the placement platform, and three wedge-shaped surfaces are provided on the lifting block. Three push rods are slidably mounted on the placement platform, and the sliding direction of the push rods is set along the radial direction of the placement platform. One end of the push rod contacts the wedge-shaped surface, and the other end of the push rod contacts the lower section of the clamping claw.

[0012] Preferably, the adjustment mechanism includes a support base fixed to the lower end of the placement platform. The lower end of the support base is fixedly connected to the guide cylinder via a mounting bracket. An adjustment shaft is slidably installed inside the guide cylinder. The upper end of the adjustment shaft is connected to the lifting block. A driven block is fixedly installed at the lower end of the adjustment shaft. A return spring is sleeved on the adjustment shaft. The upper end of the return spring is fixed to the lower end of the guide cylinder. The lower end of the return spring is connected to the driven block. A cam block is installed on the drive shaft. The driven block is in contact with the cam block.

[0013] 3. Beneficial effects:

[0014] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0015] This invention features an adjustable mechanism to accommodate fastener bodies of different sizes and shapes. It allows for adjustment of the clamping force as needed, eliminating the need for frequent fixture changes, reducing production costs and mold changeover time. It also prevents damage to fasteners due to excessive clamping force or loosening of fasteners during processing due to insufficient clamping force. The clamping mechanism ensures stable clamping of fastener bodies of different specifications, preventing displacement during processing and guaranteeing machining accuracy.

[0016] This invention features multiple clamping mechanisms arranged in a rectangular array, all driven by a drive shaft and a drive motor. This allows for the simultaneous processing of multiple fasteners, improving production efficiency. The drive motor controls the drive shaft, which in turn controls multiple adjustment and clamping mechanisms. Operation is simple and convenient for workers to operate and maintain. The overall structure is compact, occupying little space and facilitating installation on various processing equipment, thus improving space utilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the adjustment mechanism structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the external structure of the clamping mechanism of this utility model;

[0021] Figure 5 This is a schematic diagram of the internal structure of the clamping mechanism of this utility model.

[0022] Figure label:

[0023] 1. Frame; 2. Worktable; 3. Clamping mechanism; 31. Placement platform; 32. Placement slot; 33. Lifting block; 34. Wedge surface; 35. Push rod; 36. Mounting base; 37. Pin; 38. Clamping claw; 4. Fastener body; 5. Drive motor; 6. Adjustment mechanism; 61. Support base; 62. Mounting bracket; 63. Guide cylinder; 64. Adjustment shaft; 65. Return spring; 66. Driven block; 67. Cam block; 7. Drive shaft. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] 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 technical features indicated. Thus, 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, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Example

[0029] See attached document Figures 1-5 An adaptive fastener clamp includes a frame 1, a worktable 2 fixedly mounted on the upper end of the frame 1, and a plurality of clamping mechanisms 3 for clamping and fixing fastener bodies 4 arranged in a rectangular array on the worktable 2. Each clamping mechanism 3 is connected to an adjustment mechanism 6, and each row of adjustment mechanisms 6 is connected to a drive shaft 7. Each drive shaft 7 is connected to a drive motor 5.

[0030] The clamping mechanism 3 includes a placement platform 31. A placement groove 32 for placing the fastener body 4 is provided at the center of the placement platform 31. Three clamping claws 38 are evenly arranged on the outer wall of the placement platform 31. The three clamping claws 38 clamp the fastener body 4 placed in the placement groove 32.

[0031] Three mounting bases 36 are fixedly installed on the outer wall of the placement platform 31. A pin 37 is fixedly installed inside the mounting base 36. The middle section of the clamping claw 38 is rotatably mounted on the pin 37. A torsion spring is installed on the pin 37.

[0032] A lifting block 33 is slidably mounted on the lower end of the placement platform 31. The lifting block 33 has three wedge-shaped surfaces 34. Three push rods 35 are slidably mounted on the placement platform 31. The sliding direction of the push rods 35 is arranged along the radial direction of the placement platform 31. One end of the push rod 35 is in contact with the wedge-shaped surface 34, and the other end of the push rod 35 is in contact with the lower section of the clamping claw 38.

[0033] The adjustment mechanism 6 includes a support base 61 fixed to the lower end of the placement platform 31. The lower end of the support base 61 is fixedly connected to the guide cylinder 63 through the mounting bracket 62. An adjustment shaft 64 is slidably installed inside the guide cylinder 63. The upper end of the adjustment shaft 64 is connected to the lifting block 33. A driven block 66 is fixedly installed at the lower end of the adjustment shaft 64. A return spring 65 is sleeved on the adjustment shaft 64. The upper end of the return spring 65 is fixed to the lower end of the guide cylinder 63. The lower end of the return spring 65 is connected to the driven block 66. A cam block 67 is installed on the drive shaft 7. The driven block 66 is in contact with the cam block 67.

[0034] Working principle:

[0035] When the clamp is not in operation, the drive motor 5 is off and the drive shaft 7 is stationary. The return spring 65 is in its natural extended state, the adjusting shaft 64 is in its initial low position within the guide cylinder 63, and the lifting block 33 connected to the adjusting shaft 64 is also in its initial low position at the lower end of the placement platform 31. At this time, the clamping jaws 38 maintain a certain opening angle under the action of the torsion spring on the pin 37, and the placement slot 32 is in an open state, ready for the placement of the fastener body 4.

[0036] The operator places the fastener body 4 to be processed into the placement slot 32 at the center of the placement table 31. Due to the initial opening angle of the three gripping claws 38 and the preload of the torsion spring, the fastener body 4 can be initially positioned in the placement slot 32 and is roughly stabilized in the center of the placement slot 32, preventing it from undergoing large displacement before subsequent operations.

[0037] The operator starts the drive motor 5, which then rotates the drive shaft 7 connected to it. The cam block 67 mounted on the drive shaft 7 rotates synchronously with the drive shaft 7. As the cam block 67 rotates, its profile gradually contacts the driven block 66, pushing the driven block 66 upwards. This is because the profile of the cam block 67 changes continuously during rotation; when the protruding part of the cam contacts the driven block 66, it applies an upward thrust to the driven block 66.

[0038] When the driven block 66 moves upward, it drives the adjusting shaft 64, which is fixedly connected to it, to slide upward within the guide cylinder 63. The guide cylinder 63 guides the adjusting shaft 64, ensuring that the adjusting shaft 64 can only move in the vertical direction. At the same time, when the adjusting shaft 64 moves upward, it compresses the return spring 65, causing the return spring 65 to store elastic potential energy.

[0039] The upper end of the adjusting shaft 64 is connected to the lifting block 33, so when the adjusting shaft 64 moves upward, it will cause the lifting block 33 to slide upward at the lower end of the placement platform 31. The lifting block 33 has three wedge-shaped surfaces 34. When the lifting block 33 slides upward, the wedge-shaped surfaces 34 contact one end of the push rod 35 that is radially slidably mounted on the placement platform 31. As the lifting block 33 continues to move upward, the wedge-shaped surfaces 34 will generate a radially outward component force on the push rod 35, pushing the push rod 35 to slide radially outward along the placement platform 31.

[0040] The other end of the push rod 35 contacts the lower section of the clamping jaw 38. When the push rod 35 slides radially outward, it pushes the clamping jaw 38 to rotate around the pin 37. Since the middle section of the clamping jaw 38 is rotatably mounted on the pin 37, and a torsion spring is provided on the pin 37, when the push rod 35 pushes the clamping jaw 38 to rotate, it overcomes the elastic force of the torsion spring, causing the clamping jaw 38 to move further into the placement groove 32, thereby realizing the clamping operation of the fastener body 4 placed in the placement groove 32. As the drive shaft 7 continues to rotate, the cam block 67 continuously pushes the driven block 66 upward, causing the clamping jaw 38 to continuously clamp until a suitable clamping force is reached, ensuring that the fastener body 4 remains stable during processing.

[0041] Once the clamping mechanism 3 clamps the fastener body 4, corresponding processing operations, such as grinding, can be performed on the fastener body 4. Due to the stable clamping of the clamping mechanism 3, the positional accuracy and stability of the fastener body 4 can be effectively guaranteed during the processing, thereby improving the processing quality.

[0042] After the processing of the fastener body 4 is completed, the drive motor 5 reverses or stops rotating. After the drive shaft 7 stops rotating, the cam block 67 also stops rotating. At this time, under the elastic restoring force of the return spring 65, the driven block 66 is pushed downward, causing the adjusting shaft 64 to slide downward in the guide cylinder 63. The adjusting shaft 64 causes the lifting block 33 to move downward, and the wedge surface 34 on the lifting block 33 no longer applies an outward pushing force to the push rod 35.

[0043] Under its own weight or the restoring action of the torsion spring on the clamping claw 38, the push rod 35 slides radially inward along the placement platform 31 and no longer pushes the clamping claw 38. Under the elastic force of the torsion spring, the clamping claw 38 rotates in the opposite direction around the pin 37 and gradually returns to its initial open state, thereby releasing the clamp on the fastener body 4.

[0044] The operator can remove the finished fastener body 4 from the placement slot 32, completing one work cycle. The above steps can then be repeated for the next fastener processing operation.

[0045] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An adaptive fastener clamp, comprising a frame (1), a workbench (2) is fixedly installed on the upper end of the frame (1), characterized in that: The workbench (2) is provided with a plurality of clamping mechanisms (3) for clamping and fixing fastener bodies (4) in a rectangular array, each clamping mechanism (3) is connected with an adjusting mechanism (6), and one row of adjusting mechanisms (6) are connected with a driving shaft (7), and each driving shaft (7) is connected with a driving motor (5).

2. A self-adapting fastener clamp according to claim 1, wherein: The clamping mechanism (3) comprises a placement table (31), a placement groove (32) for placing the fastener body (4) is formed in the center of the placement table (31), and three clamping claws (38) are equidistantly arranged on the outer wall of the placement table (31), and the three clamping claws (38) clamp the fastener body (4) placed in the placement groove (32).

3. A self-adapting fastener clamp according to claim 2, wherein: Three mounting seats (36) are fixedly arranged on the outer wall of the placement table (31), a pin shaft (37) is fixedly installed in the mounting seat (36), the middle segment of the clamping claw (38) is rotatably installed on the pin shaft (37), and a torsional spring is arranged on the pin shaft (37).

4. A self-adapting fastener clamp according to claim 3, wherein: A lifting block (33) is slidingly installed on the lower end of the placement table (31), three wedge surfaces (34) are formed in the lifting block (33), and three push rods (35) are slidingly installed on the placement table (31), the sliding direction of the push rod (35) is arranged along the radial direction of the placement table (31), one end of the push rod (35) is in contact with the wedge surface (34), and the other end of the push rod (35) is in contact with the lower segment of the clamping claw (38).

5. An adaptive fastener clamp according to claim 4, wherein: The adjusting mechanism (6) comprises a support seat (61) fixed to the lower end of the placement table (31), the lower end of the support seat (61) is fixedly connected with a guide cylinder (63) through a mounting frame (62), an adjusting shaft (64) is slidingly installed in the guide cylinder (63), the upper end of the adjusting shaft (64) is connected with the lifting block (33), a driven block (66) is fixedly installed at the lower end of the adjusting shaft (64), a reset spring (65) is sleeved on the adjusting shaft (64), the upper end of the reset spring (65) is fixed to the lower end of the guide cylinder (63), the lower end of the reset spring (65) is connected with the driven block (66), and a cam block (67) is installed on the driving shaft (7), and the driven block (66) is in contact with the cam block (67).

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