Clamp

Abstract

The utility model discloses a clamp, which comprises a mounting seat, a clamping seat and a clamping device, the at least two pressing blocks are arranged on the mounting seat in one-to-one correspondence with the workpieces and are in sliding fit with the mounting seat; the driving assembly is connected to the sides, away from the workpiece, of the pressing blocks, the driving assembly comprises a driving element and two transmission blocks, the opposite sides of the two transmission blocks are connected to a driving shaft and a fixing base of the driving element correspondingly, and the opposite sides of the two transmission blocks are inserted into the two pressing blocks correspondingly and are in transmission fit with the slopes of the pressing blocks; when the driving shaft of the driving element linearly moves, the two pressing blocks can move along the side facing the workpiece and press and fix the workpiece. By means of the bidirectional jacking and pushing structure, inclined plane transmission is adopted, clamping force is remarkably enhanced, the self-locking function is achieved, it is ensured that a workpiece is stably fixed in the machining process, and the problems that a traditional clamp is insufficient in clamping force and lacks of the self-locking function are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing auxiliary equipment technical field, especially a clamp. BACKGROUND

[0002] In the mechanical manufacturing industry, especially in the milling process of precision parts, the fixing mode of the workpiece directly affects the quality and production efficiency of the final product. The traditional clamping device usually adopts one-way clamping or simple pneumatic / hydraulic clamping mode, which is easy to cause the displacement of the workpiece and affect the machining precision. SUMMARY

[0003] The utility model discloses at least one of the technical problems existing in the prior art. To this end, the utility model provides a clamp, which is provided with a bidirectional jacking and pushing structure, which significantly enhances the clamping force and realizes self-locking function, and ensures the stable fixation of the workpiece during the machining process.

[0004] According to the utility model embodiments, a clamp comprises:

[0005] A mounting seat is used for rotating installation of at least two workpieces;

[0006] At least two pressing blocks are arranged in the mounting seat in one-to-one correspondence with the workpieces and are in sliding fit with the mounting seat;

[0007] A driving assembly is connected to the side of the pressing block away from the workpiece, and the driving assembly comprises a driving element and two transmission blocks. The opposite sides of the two transmission blocks are respectively connected to the driving shaft of the driving element and a fixed seat. The opposite sides of the two transmission blocks are respectively inserted into the two pressing blocks and are in inclined surface transmission fit with the pressing blocks. When the driving shaft of the driving element moves linearly, the two pressing blocks can move towards the side of the workpiece and press and fix the workpiece.

[0008] According to the utility model embodiments, a clamp has at least the following beneficial effects: a bidirectional jacking and pushing structure is introduced, which ingeniously combines the efficient mechanical transmission principle and flexible mechanical structure. Not only is the output force of the driving element significantly improved, but also the effective fixation of the workpiece by the pressing block is realized through inclined surface transmission fit, solving the problems of insufficient clamping force, lack of self-locking function and poor adaptability of the traditional clamp. In application, when the driving shaft of the driving element moves linearly, the two transmission blocks can convert this movement into the movement of the pressing block towards the workpiece, thereby realizing the stable fixation of the workpiece. Moreover, due to the adoption of inclined surface transmission, a self-locking effect is naturally formed, ensuring that the workpiece can maintain a stable position even under the conditions of vibration and impact during the machining process, avoiding the occurrence of loosening or displacement phenomenon, and greatly improving the machining precision.

[0009] According to some embodiments of the utility model, a clamp, corresponding to the transmission block on one side of the fixed seat, is hingedly connected with the fixed seat.

[0010] According to some embodiments of the utility model, a clamp, corresponding to the transmission block on one side of the drive shaft, is fixedly connected with the drive shaft.

[0011] According to some embodiments of the utility model, a clamp, the matching inclined surfaces of the transmission block and the pressing block are inclined downward along the side away from the drive element, and when the drive shaft moves outward, the pressing block presses and fixes the workpiece.

[0012] According to some embodiments of the utility model, a clamp, a limiting block is fixedly arranged on the side of the mounting seat facing the drive element, the limiting block is matched with the transmission block or the fixed seat to drive the two transmission blocks to be respectively connected to the two pressing blocks and drive the two pressing blocks to jointly press or jointly release the workpiece.

[0013] According to some embodiments of the utility model, a clamp, the limiting block is located on the retraction path of the transmission block, and the two side walls of the limiting block can abut against the transmission block and the fixed seat for transmission matching.

[0014] According to some embodiments of the utility model, a clamp, two supporting seats are fixed on the side of the mounting seat facing the transmission block, the supporting seat is provided with a supporting groove, and the transmission block is slidingly arranged in the supporting groove.

[0015] According to some embodiments of the utility model, a clamp, the width of the supporting groove, the width of the transmission block and the width of the pressing block are equal.

[0016] According to some embodiments of the utility model, a clamp, at least two positioning seats are fixedly arranged on the side of the mounting seat away from the transmission block, the positioning seats are arranged in one-to-one correspondence with the pressing blocks, the workpiece is rotatably arranged on the positioning seat, a return spring is arranged between the positioning seat and the pressing block to drive the pressing block to move towards the side of the transmission block.

[0017] According to some embodiments of the utility model, a clamp, the workpiece cover is arranged on the positioning seat, the positioning seat is connected with a rotating shaft, the workpiece is rotatably arranged on the positioning seat through the rotating shaft, the positioning seat is provided with two guide grooves, the pressing blocks are arranged in one-to-one correspondence with the guide grooves and can extend out of the guide grooves to press the two sides of the workpiece.

[0018] Additional aspects and advantages of the present application will be described in the following description and will be apparent from the description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein:

[0020] Figure 1 Fig. 1 is a schematic diagram of the overall structure of a clamp according to an embodiment of the present application; Figure 1 ;

[0021] Figure 2 Fig. 2 is a schematic diagram of the cross-sectional structure of a clamp according to an embodiment of the present application;

[0022] Figure 3 Fig. 3 is an exploded view of a clamp according to an embodiment of the present application;

[0023] Figure 4 Fig. 4 is a schematic diagram of the overall structure of a clamp according to an embodiment of the present application; Figure 2 .

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] mounting seat 100; positioning seat 110; guide groove 1101; supporting seat 120; supporting groove 1201; limiting block 130; return spring 140;

[0026] pressing block 200;

[0027] drive assembly 300; drive element 310; drive shaft 311; fixing seat 312; transmission block 320;

[0028] rotating shaft 400;

[0029] workpiece 500. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example embodiments in which the same or similar elements are denoted by the same or similar reference numerals throughout the various figures. The embodiments described below are exemplary only, and are intended to explain the present application, and should not be understood as limiting the present application.

[0031] In the description of the utility model, it needs to be understood that, if the direction description, such as the direction or position relation of up, down, front, back, left, right and the like indicated is based on the direction or position relation shown in the drawing, it is only for the convenience of describing the utility model and simplifying the description, and it does not indicate or imply that the device or element indicated must have a particular direction, a particular direction structure and operation, therefore it cannot be understood as the limitation of the utility model.

[0032] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, and above, below, within and the like are included in the number.If it is described to the first, the second is only used for distinguishing the technical features for the purpose, and it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0033] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0034] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model.In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] In the mechanical manufacturing industry, especially in the milling process of precision parts, the fixing mode of the workpiece directly affects the quality and production efficiency of the final product.The traditional clamping device usually adopts one-way clamping or simple pneumatic / hydraulic clamping mode, which is easy to cause the displacement of the workpiece and affect the machining precision.

[0036] Therefore, as Figures 1 to 4As shown, the utility model provides a kind of clamp, including mounting seat 100, compression block 200 and drive assembly 300, mounting seat 100 is used to rotate installation for at least two workpieces 500, drive assembly 300 is used to drive compression block 200 and compresses fixed workpiece 500.For example, mounting seat 100 is fixedly provided with positioning seat 110, workpiece 500 cover is installed in positioning seat 110, and positioning seat 110 is connected with rotating shaft 400, and workpiece 500 is rotatably installed in positioning seat 110 by rotating shaft 400.In some applications, workpiece 500 is fed to positioning seat 110, and is inserted into rotating shaft 400 by artificial or automatic bolt, so that workpiece 500 is rotatably installed on positioning seat 110.Further, positioning seat 110 is provided with guide slot 1101, and compression block 200 can extend guide slot 1101 to compress workpiece 500, and then workpiece 500 is firmly fixed on positioning seat 110.For this, workpiece 500 can be full-welded welding, milling processing, drilling processing etc., for example, positioning seat 110 is provided with two guide slots 1101, and compression block 200 is arranged in one-to-one correspondence with guide slot 1101 and can extend guide slot 1101 to compress both sides of workpiece 500, and the end surface of workpiece 500 is flattened and fixedly installed, and then the end surface of workpiece 500 is milled by milling spindle.Specifically, compression block 200 is at least two, and compression block 200 is arranged in one-to-one correspondence with workpiece 500, and drive assembly 300 is connected to the side of compression block 200 away from workpiece 500.And drive assembly 300 includes drive element 310 and two transmission blocks 320, and the opposite sides of the two transmission blocks 320 are respectively connected to the driving shaft 311 and the fixed seat 312 of the drive element 310, and the opposite sides of the two transmission blocks 320 are respectively inserted into the two compression blocks 200 and are in inclined surface transmission cooperation with the two compression blocks 200, when the driving shaft 311 of the drive element 310 linearly moves, the two compression blocks 200 can move towards the side of workpiece 500 and compress and fix workpiece 500.It should be noted that the bidirectional jacking and pushing structure is introduced, which skillfully combines the efficient mechanical transmission principle and flexible mechanical structure, not only significantly improves the output force of the drive element 310, but also realizes the effective fixation of the workpiece 500 by the compression block 200 through inclined surface transmission cooperation, solves the problems of insufficient clamping force, lack of self-locking function and poor adaptability of traditional clamps;In application, when the driving shaft 311 of the drive element 310 linearly moves, the two transmission blocks 320 can convert this movement into the movement of the compression block 200 towards the workpiece 500, so as to stably fix the workpiece 500;And, since inclined surface transmission is adopted, self-locking effect is naturally formed, so that workpiece 500 can maintain stable position even under vibration and impact conditions during processing, avoiding loosening or displacement phenomenon, greatly improving processing accuracy.

[0037] In some embodiments, two transmission blocks are fixedly connected to the drive shaft and the fixed seat (not shown in the figure) respectively. In some applications, when the drive shaft 311 extends, the transmission block 320 on one side of the drive shaft 311 lifts the corresponding compression block 200 to compress the workpiece 500, and then, under the reaction force, the transmission block 320 on one side of the fixed seat 312 lifts the corresponding compression block 200 to compress the workpiece 500. In some embodiments of the present application, referring again to Figure 2 and Figure 3 the transmission block 320 on one side of the fixed seat 312 is hinged to the fixed seat 312, and the transmission block 320 on one side of the drive shaft 311 is fixedly connected to the drive shaft 311, which ingeniously solves the problem of stress concentration caused by rigid connection. The fixed seat 312 of the drive element 310 drives the transmission block 320 on one side of the fixed seat 312 by adopting a hinged mode, which ensures that the reverse force generated after the drive shaft 311 extends can smoothly drive the transmission block 320 on one side of the fixed seat 312 to move, the force transmission is more uniform and smooth, greatly reducing the wear and tear between mechanical parts, prolonging the service life of the equipment. In addition, the transmission block 320 on one side of the drive shaft 311 is fixedly connected to the drive shaft 311, which further enhances the directness and accuracy of power transmission. In this regard, fixed connection means that when the drive shaft 311 performs linear motion, it can directly and without delay transmit power to the transmission block 320, thereby driving the compression block 200 to complete the expected action. Such design ensures the improvement of system response speed and the optimization of control accuracy. Especially in high-precision machining environment, fast and accurate response capability is crucial to ensure machining quality. In addition, the fixed connection mode also simplifies the mechanical structure, reduces the possibility of failure, and improves the stability and reliability of the entire clamp system. In summary, the two design choices complement each other and together build an efficient, reliable and easy-to-maintain transmission system. The hinged design gives the transmission block 320 the necessary flexibility, while the fixed connection ensures the directness and accuracy of power transmission from the drive element 310 to the compression block 200, greatly improving the service life of the drive element 310.

[0038] In some embodiments, the mating inclined surfaces of the transmission block and the compression block are inclined upward along the side away from the drive element (not shown in the figure), and when the drive shaft moves inwardly and retracts, the compression block compresses the fixed workpiece. However, the drive element 310 commonly used in automation applications is a pneumatic cylinder, which performs better in speed and force when extended. In this regard, referring again to Figure 2In some embodiments of the present utility model, the matching inclined surfaces of transmission block 320 and compression block 200 are inclined downward along the side away from driving element 310. When driving shaft 311 moves outward, compression block 200 compresses and fixes workpiece 500. This not only ingeniously solves the problems of traditional clamping devices in clamping force, self-locking performance and adaptability, but also greatly enhances the stability and reliability of the clamp in practical application. Specifically, the design of the matching inclined surfaces of transmission block 320 and compression block 200 being inclined downward along the side away from driving element 310 enables linear motion to be effectively converted into the movement of compression block 200 in the direction towards workpiece 500 when driving shaft 311 moves outward, thereby achieving the stable fixation of workpiece 500. This process fully utilizes the principle of mechanics and realizes the effective amplification of force through the conversion of inclined surfaces, so that even a smaller driving element 310 output force can generate sufficient compression force to ensure the stability of workpiece 500. This not only improves the machining precision, but also reduces the product quality problems caused by insufficient clamping force. More importantly, this inclined surface transmission matching design naturally forms a self-locking mechanism. Once compression block 200 compresses workpiece 500 under the action of the inclined surface, it is difficult for compression block 200 to loosen itself without external force due to the angle characteristics of the inclined surface. This self-locking effect is crucial to maintaining the stable position of workpiece 500 during the entire machining process, especially when facing adverse conditions such as vibration and impact. It can effectively prevent workpiece 500 from loosening or displacing, further ensuring the machining precision and product quality. At the same time, this also relieves the burden of operators, as they do not need to frequently check and adjust the clamping state, improving work efficiency.

[0039] As Figures 1 to 3As shown, in some embodiments of the utility model, the mounting seat 100 is fixedly provided with a limiting block 130 on the side facing the driving element 310, the limiting block 130 cooperates with the transmission block 320 or the fixed seat 312 to drive the two transmission blocks 320 to be connected to the two compression blocks 200 respectively and drive the two compression blocks 200 to compress or release the workpiece 500 together. It should be noted that the limiting block 130 not only strengthens the connection stability between the transmission block 320 and the compression block 200, but also realizes efficient compression or release of the workpiece 500 by the compression block 200 by precisely controlling the movement path of the transmission block 320, thereby greatly improving the performance of the clamp in practical application. For example, the mating inclined surface of the transmission block 320 and the compression block 200 is inclined downward along the side away from the driving element 310, the limiting block 130 is located on the retraction path of the transmission block 320, when the driving shaft 311 moves outward, the compression block 200 compresses and fixes the workpiece 500, then, when the workpiece 500 needs to be released, the driving shaft 311 moves inwardly and retracts, the compression block 200 corresponding to one side of the driving shaft 311 releases the workpiece 500, then, due to the limiting block 130 blocking the transmission block 320, the fixed seat 312 will move to one side of the limiting block 130, driving the compression block 200 corresponding to one side of the fixed seat 312 to release the workpiece 500. For another example, when the mating inclined surface of the transmission block and the compression block is inclined upward along the side away from the driving element (not shown in the figure), the driving shaft moves inwardly and retracts, the compression block corresponding to one side of the driving shaft compresses and fixes the workpiece, then, due to the limiting block blocking the transmission block, the fixed seat will move to one side of the limiting block, driving the compression block corresponding to one side of the fixed seat to compress and fix the workpiece. Further, the two side walls of the limiting block 130 can abut and transmit with the transmission block 320 and the fixed seat 312, ensuring that the transmission block 320 can move accurately and stably under the guidance of the limiting block 130 when the driving element 310 works. For example, when the transmission block 320 corresponding to one side of the driving shaft 311 moves inwardly and abuts against the side wall of the limiting block 130, it will drive the fixed seat 312 to move towards the limiting block 130, and the fixed seat 312 abuts against the other side wall of the limiting block 130 when it moves into position.

[0040] Referring again to Figures 1 to 3In some embodiments of the utility model, two bearing seats 120 are fixed on the side of mounting seat 100 facing transmission block 320, bearing seat 120 is provided with bearing groove 1201, transmission block 320 is slidingly arranged in bearing groove 1201, not only provides stable support platform for transmission block 320, also ensures its stability and accuracy when performing task. It is easy to understand that the existence of bearing groove 1201 makes transmission block 320 can smoothly slide in it, reduces friction loss in the movement process, improves work efficiency. At the same time, bearing seat 120 is fixed on the side of mounting seat 100 facing transmission block 320, such layout makes the whole system more compact, saves space, and is also convenient for maintenance and inspection. And the design of bearing seat 120 also endows clamp with higher adaptability and operation convenience, since bearing groove 1201 can provide a fixed sliding track, it ensures that transmission block 320 can keep correct movement direction whether in advancing or retreating process. In some embodiments, the bottom wall surface of bearing groove 1201 and the bottom wall surface of transmission block 320 abut transmission to bear transmission block 320, and the distance between the opposite side walls of bearing groove is greater than the width of transmission block (not shown in the figure). In some embodiments of the utility model, the width of bearing groove 1201, the width of transmission block 320 and the width of compression block 200 are all equal, so that, in addition to the bottom wall surface of bearing groove 1201 bearing transmission block 320, the opposite wall surface of bearing groove 1201 can position transmission block 320, ensuring the close cooperation and accurate movement between various components. First, the consistency of such size makes the sliding of transmission block 320 in bearing groove 1201 more smooth and stable, reduces the friction and wear caused by size mismatch, and for this, the smooth sliding not only improves the movement accuracy of transmission block 320, but also reduces energy loss, improves the overall efficiency of the system. In addition, since there is no additional gap between transmission block 320 and bearing groove 1201, this effectively prevents the possible shaking or deviation of transmission block 320 during work, ensuring its stable linear motion along the predetermined path. In addition, the equal width design also simplifies the manufacturing and assembly process of the clamp, since all the key components have the same width standard, this not only facilitates production and quality control, but also makes the assembly process more simple and fast. The unified size standard is also conducive to subsequent maintenance and replacement, technicians can quickly find suitable replacement parts according to the standard size, reducing downtime and improving production efficiency.

[0041] Referring again to Figure 1 , Figure 2 and Figure 4In some embodiments of the utility model, at least two positioning seats 110 are fixedly arranged on the side of the mounting seat 100 away from the transmission block 320, the positioning seats 110 are arranged one by one corresponding to the compression blocks 200, the workpiece 500 is rotatably installed on the positioning seat 110, and a return spring 140 is arranged between the positioning seat 110 and the compression block 200 to drive the compression block 200 to move towards the side of the transmission block 320. First, the design of the return spring 140 enables the compression block 200 to return to the original position naturally without external force. When the driving element 310 exerts pressure, the compression block 200 can move towards the workpiece 500 and fix the workpiece 500 by overcoming the elastic force of the spring; and after the machining is completed, as soon as the pressure of the driving element 310 is released, the return spring 140 will immediately act to push the compression block 200 back to the initial position. This automatic reset mechanism greatly simplifies the operation process and improves the work efficiency.

[0042] Optionally, the positioning seat 110 has four, the driving assembly 300 has two, one driving assembly 300 corresponds to two positioning seats 110, therefore, a single driving assembly 300 cooperates with two positioning seats 110 to compress and fix two workpieces 500, and further, two driving assemblies 300 correspond to a double-station design, further improving the convenience of material replacement and machining.

[0043] The utility model embodiments are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A clamp, characterized in that, include: Mounting base for rotating and mounting at least two workpieces; At least two clamping blocks are arranged on the mounting base in a one-to-one correspondence with the workpiece and are slidably engaged with the mounting base; A drive assembly is connected to the side of the clamping block away from the workpiece. The drive assembly includes a drive element and two transmission blocks. The opposite sides of the two transmission blocks are respectively connected to the drive shaft of the drive element and the fixed seat. The opposite sides of the two transmission blocks are respectively inserted into the two clamping blocks and engage with the inclined surfaces of the clamping blocks. When the drive shaft of the drive element moves linearly, both clamping blocks can move along the side facing the workpiece and clamp and fix the workpiece.

2. The clamp according to claim 1, characterized in that: The transmission block corresponding to one side of the fixed seat is hinged to the fixed seat.

3. A clamp according to claim 1, characterized in that: The transmission block corresponding to one side of the drive shaft is fixedly connected to the drive shaft.

4. A clamp according to claim 1, characterized in that: The mating inclined surfaces of the transmission block and the clamping block are inclined downward along the side away from the driving element. When the driving shaft moves outward, the clamping block presses and fixes the workpiece.

5. A clamp according to any one of claims 1 to 4, characterized in that: A limiting block is fixedly provided on the side of the mounting base facing the driving element. The limiting block cooperates with the transmission block or the fixed base to drive the two transmission blocks to remain connected to the two clamping blocks respectively, and drive the two clamping blocks to jointly clamp or release the workpiece.

6. A clamp according to claim 5, characterized in that: The limiting block is located on the retraction path of the transmission block, and the two side walls of the limiting block can abut and engage with the transmission block and the fixed seat.

7. A clamp according to claim 1, characterized in that: Two support seats are fixed on the side of the mounting base facing the transmission block. The support seats are provided with support grooves, and the transmission block is slidably disposed in the support grooves.

8. A clamp according to claim 7, characterized in that: The widths of the support groove, the transmission block, and the clamping block are all equal.

9. A clamp according to claim 1, characterized in that: At least two positioning seats are fixedly provided on the side of the mounting base away from the transmission block. The positioning seats are arranged in a one-to-one correspondence with the clamping blocks. The workpiece is rotatably mounted on the positioning seats. A return spring is provided between the positioning seats and the clamping blocks to drive the clamping blocks to move toward one side of the transmission block.

10. A clamp according to claim 9, characterized in that: The workpiece is mounted on the positioning seat, which is connected to a rotating shaft. The workpiece is rotatably mounted on the positioning seat via the rotating shaft. The positioning seat has two guide grooves. The clamping blocks are arranged in correspondence with the guide grooves and can extend out of the guide grooves to clamp the two sides of the workpiece.

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