Screw type clamping tool
Through the design of screw clamping tooling, the sliding block is driven by rotary transmission screw to achieve uniform clamping of the workpiece, solving the problem of difficult clamping force in the prior art, improving product quality and accuracy, and simplifying the tooling structure and operation process.
Patent Information
- Application Number
- CN202421575579.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-04
AI Technical Summary
In the prior art, the clamping force and uniformity of the clamping tool are difficult to control, resulting in the product being displaced or deformed during processing or testing, affecting product quality and accuracy. At the same time, the hydraulic tooling design is complex, takes up a large space, operates in a complex manner, and is inefficient.
The screw clamping tool is adopted, including the clamp bottom plate, the workpiece bearing seat, the pressure plate, the pressure plate swing arm and the screw transmission mechanism. The slider is driven to move by rotating the transmission screw, and then the workpiece is clamped through the slider to ensure the magnitude and uniformity of the clamping force.
It realizes uniform clamping of the product, improves the applicability of the locking device, simplifies the tooling structure, reduces the tooling replacement time and development costs, facilitates clamping of special-shaped workpieces, does not interfere with processing or checking positions, and improves the quality and accuracy of the product.
Smart Images
Figure CN222873963U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of clamping machinery, in particular to a screw type clamping device. Background Art
[0002] In the field of mechanical manufacturing technology, tooling refers to various tools and equipment used in the production process, including but not limited to fixtures, molds, gauges, etc. In many cases, clamping tooling is required to accurately position and clamp products to prevent them from relative movement when subjected to external forces, so as to facilitate subsequent processing or testing operations.
[0003] In the prior art, common clamping tools usually use manual or pneumatic methods to drive the locking device to achieve the clamping of the product. For example, the product is clamped by a cylinder or a manual push clamp in conjunction with a push block. The advantages of this method are simple structure and easy operation, but the size and uniformity of its clamping force are often difficult to control, which may cause the product to be displaced or deformed during processing or testing, thereby affecting the quality and precision of the product. The prior art also uses hydraulic methods to drive the locking mechanism, but the design of hydraulic tooling is often more complicated, requiring external oil lines and hydraulic stations. The structure is complex and occupies a large space. The operation is complicated and inconvenient for tooling change, and the efficiency is low, which affects the tooling development cost and production efficiency. Summary of the invention
[0004] The purpose of the utility model is to provide a screw-type clamping tool that is easy to control the clamping force and has uniform clamping force, so as to at least provide a beneficial choice or create conditions for solving one or more technical problems existing in the prior art.
[0005] In order to achieve the above objectives, the utility model adopts the following technical solutions.
[0006] A screw-type clamping tool, which includes a fixture base plate, a workpiece bearing seat, a pressure plate, a pressure plate swing arm and a screw transmission mechanism, wherein the workpiece bearing seat is fixed to the fixture base plate and is used to carry the workpiece to be processed, the pressure plate swing arms are arranged in pairs, and the two paired pressure plate swing arms are respectively rotatably installed on both sides of the fixture base plate, the pressure plate is installed at the clamping end of the pressure plate swing arm, the screw transmission mechanism is connected to the two paired pressure plate swing arms, and is used to drive the two paired pressure plate swing arms to open or close, thereby achieving pressure-maintaining clamping or loosening of the workpiece to be processed; the screw transmission mechanism includes a transmission screw, a first slider and a second slider, the first slider and the second slider are respectively movably installed on the driving ends of the two pressure plate swing arms, and move toward and away from each other under the drive of the transmission screw.
[0007] More preferably, the transmission screw is a bidirectional screw, and the spiral directions of the threads on the bidirectional screw that respectively cooperate with the first slider and the second slider are opposite.
[0008] More preferably, the transmission screw is a one-way screw, and the internal threads of the first slider and the second slider have opposite spiral directions.
[0009] More preferably, the pressure plate is a flat wear-resistant pressure plate, which is a wear-resistant part made of a wear-resistant material or has a wear-resistant layer on the pressing surface.
[0010] More preferably, two clamping stations are provided on the workpiece bearing seat, and a workpiece positioning block and a pair of the pressure plate swing arms are provided corresponding to each clamping station; the workpiece positioning block is arranged between the two clamping stations.
[0011] More preferably, a support block is provided at the bottom of the workpiece bearing seat, and the workpiece bearing seat is suspended above the fixture bottom plate through the support block.
[0012] More preferably, the transmission screw is installed on the lower side of the fixture base plate through a screw bearing and a screw bearing seat, and corresponding screw bearings and screw bearing seats are respectively provided at both ends of the transmission screw.
[0013] More preferably, the movable installation structure of the first slider and the second slider is as follows: a transmission sleeve is arranged at the driving end of the pressure plate swing arm, and a rotational connection is formed between the transmission sleeve and the corresponding slider via a bearing.
[0014] More preferably, a power mechanism for providing rotational power to the transmission screw is provided corresponding to the transmission screw.
[0015] The utility model has at least the following beneficial effects.
[0016] 1. The screw-type clamping fixture provided by the utility model, when working, drives the slider to move by rotating the transmission screw, and then drives the pressure plate installed on the pressure plate swing arm to clamp the workpiece (product) through the slider. It has the characteristics of simple structure and convenient operation, and ensures the size and uniformity of the clamping force, realizes pressure-maintaining clamping of the product, and improves the applicability of the locking device. In addition, the clamping is combined with the pressure plate to simplify the fixture structure, reduce the fixture change time, reduce the fixture development cost, and facilitate the clamping of special-shaped workpieces without interfering with the processing or inspection position.
[0017] 2. Use a flat wear-resistant pressure plate to improve the uniformity of contact with the workpiece (product) during pressing, better avoid displacement or deformation of the workpiece (product) during processing or testing, reduce clamping scratches on the workpiece (product), and improve product quality and precision. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 Shown is a structural schematic diagram of the screw-type clamping tooling provided by the utility model.
[0019] Figure 2 Shown is a schematic diagram of the bottom structure of the screw-type clamping tool provided by the utility model.
[0020] Figure 3 Shown is a top view of the screw-type clamping fixture provided by the utility model.
[0021] Figure 4 Shown is a side view of the screw-type clamping tool provided by the utility model.
[0022] Description of Figure Numbers.
[0023] 1: fixture base plate, 2: workpiece bearing seat, 3: pressure plate, 4: pressure plate swing arm, 5: screw transmission mechanism, 6: workpiece positioning block, 7: support block, 8: screw bearing, 9: screw bearing seat, 10: transmission shaft sleeve, 11: bearing.
[0024] 501: transmission screw rod, 502: first slider, 503: second slider. DETAILED DESCRIPTION
[0025] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, and cannot be understood as limiting the utility model.
[0026] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention.
[0027] See also Figure 1-Figure 3As shown, a screw-type clamping tool comprises a fixture base plate 1, a workpiece bearing seat 2, a pressure plate 3, a pressure plate swing arm 4 and a screw transmission mechanism 5. The workpiece bearing seat 2 is fixed on the fixture base plate 1 and is used to carry the workpiece to be processed. The pressure plate swing arms 4 are arranged in pairs, and the two paired pressure plate swing arms 4 are respectively rotatably installed on both sides of the fixture base plate 1. The pressure plate 3 is installed on the clamping end of the pressure plate swing arm 4. The screw transmission mechanism 5 is connected to the two paired pressure plate swing arms 4 and is used to drive the two paired pressure plate swing arms 4 to open or close, thereby realizing the pressure-maintaining clamping or loosening of the workpiece to be processed; the screw transmission mechanism 5 comprises a transmission screw 501, a first slider 502 and a second slider 503. The first slider 502 and the second slider 503 are respectively movably installed on the driving ends of the two pressure plate swing arms 4, and move toward and away from each other under the drive of the transmission screw 501.
[0028] The screw-type clamping fixture provided in this embodiment drives the slider to move by rotating the transmission screw 501, and then drives the pressing plate 3 installed on the pressing plate swing arm 4 to clamp the workpiece (product) through the sliding plate. It has the characteristics of simple structure and convenient operation, and ensures the size and uniformity of the clamping force, realizes pressure-maintaining clamping of the product, and improves the applicability of the locking device. In addition, the clamping is combined with the pressing plate to simplify the fixture structure, reduce the fixture change time, reduce the fixture development cost, and facilitate the clamping of special-shaped workpieces without interfering with the processing or inspection position.
[0029] In this embodiment, the movement of the first slider 502 and the second slider 503 toward and away from each other is achieved by a bidirectional screw; that is, the transmission screw 501 is a bidirectional screw, and the spiral directions of the threads on the bidirectional screw that respectively cooperate with the first slider 502 and the second slider 503 are opposite. In some embodiments, the movement of the first slider 502 and the second slider 503 toward and away from each other is achieved by a unidirectional screw, and the spiral directions of the internal threads of the first slider 502 and the second slider 503 are opposite; it is not limited to this embodiment.
[0030] In this embodiment, the pressing plate 3 is preferably a flat wear-resistant pressing plate, which is a wear-resistant part made of a wear-resistant material or has a wear-resistant layer on the pressing surface. This can improve the uniformity of contact with the workpiece (product) during pressing, better avoid displacement or deformation of the workpiece (product) during processing or testing, reduce the clamping scratches of the workpiece (product), and improve the quality and precision of the product.
[0031] Refer to Figure 1As shown, the workpiece bearing seat 2 is provided with two clamping stations, and each clamping station is provided with a workpiece positioning block 6 and a pair of the pressure plate swing arms 4; the workpiece positioning block 6 is arranged between the two clamping stations. In this way, not only can two workpieces (products) be clamped and processed at the same time, but also the two workpieces to be processed can be positioned to avoid mutual interference.
[0032] Refer to Figure 1 As shown, a support block 7 is provided at the bottom of the workpiece bearing seat 2, and the workpiece bearing seat 2 is suspended above the fixture bottom plate 1 through the support block 7. The advantage of this arrangement is that the height of the workpiece bearing seat 2 can be increased, the clamping operation is convenient, and the thickness of the workpiece bearing seat 2 is prevented from being too thick.
[0033] Refer to Figure 2 As shown, the transmission screw 501 is installed on the lower side of the fixture base plate 1 through a screw bearing 8 and a screw bearing seat 9. To ensure the stable operation of the transmission screw 501, it is preferred that corresponding screw bearings 8 and screw bearing seats 9 are respectively provided at both ends of the transmission screw 501.
[0034] Combination Figure 4 As shown, the movable installation structure of the first slider 502 and the second slider 503 is: a transmission sleeve 10 is set at the driving end of the pressure plate swing arm 4, and the transmission sleeve 10 and the corresponding slider are rotatably connected through a bearing 11; the connection is convenient and durable.
[0035] It should be noted that the screw-type clamping fixture provided in this embodiment can maintain pressure, clamp or loosen by a simple operation method, such as rotating the transmission screw with an electric tool, which can simplify the operation process, improve operation efficiency, and improve production efficiency and product quality. At the same time, through the material and structural design of the transmission screw, slider, clamping mechanism and other components, its durability and stability can be improved, its service life can be extended, and maintenance costs can be reduced. In addition, the entire set of fixtures does not use cylinders or oil cylinders, but only relies on screw transmission, and has a simple structure; the arrangement of air and oil circuits is eliminated, the overall size of the fixture is small, the interference between the workpiece and the processing is reduced, the changeover is convenient, and the operating cost and fixture development cost are reduced.
[0036] It should also be noted that, in the description of the present invention, directional words such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.
[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, "at least" means one or more, unless otherwise clearly and specifically defined.
[0038] In the present invention, unless otherwise specified and limited, the terms "assembly", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0039] In the utility model, unless otherwise specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "below" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the height of the second feature. A first feature being "above", "below" and "below" a second feature includes that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the second feature.
[0040] Through the description of the above structure and principle, those skilled in the art should understand that the present invention is not limited to the above specific implementations. Improvements and substitutions based on the present invention using the known technology in the art fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims and their equivalents. Parts not described in the specific implementations are prior art or common knowledge.
Claims
1. A screw-type clamping fixture, characterized in that: It includes a fixture base plate, a workpiece bearing seat, a pressure plate, a pressure plate swing arm and a screw transmission mechanism. The workpiece bearing seat is fixed on the fixture base plate and is used for carrying the workpiece to be processed. The pressure plate swing arms are arranged in pairs. The two paired pressure plate swing arms are respectively rotatably installed on both sides of the fixture base plate. The pressure plate is installed at the clamping end of the pressure plate swing arm. The screw transmission mechanism is connected to the two paired pressure plate swing arms and is used to drive the two paired pressure plate swing arms to open or close, thereby realizing the pressure-maintaining clamping or loosening of the workpiece to be processed; the screw transmission mechanism includes a transmission screw, a first slider and a second slider. The first slider and the second slider are respectively movably installed on the driving ends of the two pressure plate swing arms, and move toward and away from each other under the drive of the transmission screw.
2. A screw-type clamping fixture according to claim 1, characterized in that: The transmission screw is a bidirectional screw, and the screw threads on the bidirectional screw respectively matched with the first slider and the second slider have opposite spiral directions.
3. A screw-type clamping fixture according to claim 1, characterized in that: The transmission screw is a one-way screw, and the internal threads of the first slider and the second slider have opposite spiral directions.
4. A screw-type clamping fixture according to claim 1, characterized in that: The pressing plate is a flat wear-resistant pressing plate, which is a wear-resistant part made of a wear-resistant material or has a wear-resistant layer on the pressing surface.
5. The screw-type clamping fixture according to claim 1, characterized in that: Two clamping stations are arranged on the workpiece bearing seat, and a workpiece positioning block and a pair of the pressure plate swing arms are arranged corresponding to each clamping station; the workpiece positioning block is arranged between the two clamping stations.
6. A screw-type clamping fixture according to claim 1, characterized in that: A support block is provided at the bottom of the workpiece bearing seat, and the workpiece bearing seat is suspended above the fixture bottom plate through the support block.
7. The screw-type clamping fixture according to claim 1, characterized in that: The transmission screw is installed on the lower side of the fixture base plate through a screw bearing and a screw bearing seat, and corresponding screw bearings and screw bearing seats are respectively provided at both ends of the transmission screw.
8. The screw-type clamping fixture according to claim 1, characterized in that: The movable installation structure of the first slider and the second slider is as follows: a transmission sleeve is arranged at the driving end of the pressure plate swing arm, and a rotation connection is formed between the transmission sleeve and the corresponding slider via a bearing.
9. The screw-type clamping fixture according to claim 1, characterized in that: A power mechanism for providing rotational power to the transmission screw is provided corresponding to the transmission screw.