Variable limit compression clamp

Abstract

The application provides a variable-limit compression clamp, which comprises a clamp base, a lower limit clamp, an upper limit clamp and two clamping sliders, two limit sliding grooves are arranged on the outer side wall of the lower limit clamp, each limit sliding groove is an arc-shaped groove spirally rising from bottom to top, two limit protrusions are arranged on the inner side wall of the upper limit clamp, each limit protrusion is correspondingly slidably matched with each limit sliding groove, so that the upper limit clamp is rotatably installed on the lower limit clamp, a circular recess for placing a workpiece is arranged on the upper end surface of the lower limit clamp, a rectangular opening is arranged on the upper end surface of the upper limit clamp, the two clamping sliders are respectively installed at the rectangular opening, and springs are respectively installed on the two opposite sides of the two clamping sliders. The variable-limit compression clamp provided by the application can be adjusted according to the length, width and height of a workpiece, is suitable for clamping requirements of various workpiece sizes, and has a wider application range.

Description

Technical Field

[0001] This invention relates to the field of compression clamp technology, and in particular to a variable limit compression clamp. Background Technology

[0002] In manufacturing, fixtures are essential tools that play a crucial role in ensuring the stable holding of workpieces during machining. Compression fixtures are devices used to hold workpieces during compression machining, and their design and use are critical to ensuring the stability, accuracy, and safety of the workpiece. As a tool for holding workpieces, compression fixtures directly affect the processing quality and manufacturing efficiency of products.

[0003] While traditional compression clamps perform well in many situations, their fixed-limit design limits their clamping dimensions and restricts their applicability. If the workpiece shape does not conform to the clamp's design, other types of clamps may be required, leading to decreased production efficiency. With the development of manufacturing and technological advancements, production lines require more flexible and diverse clamps to accommodate workpieces of different sizes, shapes, and materials. Traditional fixed-limit clamps can no longer meet this demand for flexibility and adjustability, prompting the research and development of variable-limit clamps.

[0004] Existing variable limit compression fixtures overcome some shortcomings of traditional compression fixtures, allowing for adjustments based on the size and shape of different workpieces without requiring fixture replacement, thus improving machining flexibility. However, existing variable limit compression fixtures can only adjust dimensions in the length and width directions, but cannot adjust the height of the compression fixture according to the longitudinal height of the workpiece, which significantly limits their ability to compress workpieces of varying thicknesses. Summary of the Invention

[0005] The purpose of this invention is to provide a variable limit compression fixture that can solve the problem that existing variable limit compression fixtures cannot adjust the height of the fixture according to the longitudinal height of the workpiece, which has great limitations for compressing workpieces of different thicknesses.

[0006] This invention provides a variable limit compression fixture, comprising at least a fixture base, a lower limit fixture, an upper limit fixture, and two opposing clamping sliders. Both the lower and upper limit fixtures are circular. The lower limit fixture has two limiting grooves on its outer sidewall, each groove being an arc-shaped groove spiraling upwards from bottom to top. The upper limit fixture has two limiting protrusions on its inner sidewall, each protrusion corresponding to and slidingly engaging with a limiting groove, allowing the upper limit fixture to be rotatably mounted on the lower limit fixture. The upper end face of the lower limit fixture has a circular groove for placing a workpiece, and the upper end face of the upper limit fixture has a rectangular opening. The two clamping sliders are respectively mounted at the rectangular opening, and springs are installed on opposite sides of the two clamping sliders.

[0007] According to the present invention, a variable limit compression clamp further includes a compression clamp housing, wherein a mounting chamber for mounting the clamp base is provided in the compression clamp housing, and a guide hole is provided at the upper end of the compression clamp housing, the guide hole communicating with the mounting chamber.

[0008] According to the present invention, a variable limiting compression clamp has a rectangular shell structure. The lower parts of the left and right side plates of the compression clamp shell are respectively provided with clamp base mounting ports. The outer shell baffles for sealing the clamp base mounting ports are slidably installed on the left and right side plates respectively.

[0009] According to the present invention, a variable limiting compression clamp is provided with two vertically extending baffle slide rails on the outer surfaces of the left side plate and the right side plate, and two baffle slide grooves on the inner surfaces of each outer shell baffle, and each baffle slide groove slides in a corresponding sliding engagement with each baffle slide rail.

[0010] According to the present invention, a variable limiting compression clamp is provided with base grooves on the inner sides of the front and rear side plates of the compression clamp housing, and base slide rails are provided on opposite sides of the clamp base, and each base slide rail can slide and engage with each base groove respectively.

[0011] According to the present invention, a variable limiting compression clamp is provided with slider grooves on the left and right sides of the rectangular opening, and the left and right ends of each clamping slider are respectively slidably engaged with the two slider grooves.

[0012] According to the present invention, a variable limiting compression clamp is provided with inner wall grooves on the front and rear sides of the rectangular opening, and the two clamping sliders can be retracted into the two inner wall grooves respectively.

[0013] According to a variable limit compression clamp provided by the present invention, two springs are respectively installed between each clamping slider and the corresponding inner wall groove. Each spring has a spring buckle at both ends. An inner wall buckle adapted to the spring buckle is provided in the inner wall groove. A slider buckle adapted to the spring buckle is provided on the clamping slider. One end of the spring is detachably connected to the inner wall buckle through the spring buckle, and the other end of the spring is detachably connected to the slider buckle through the spring buckle.

[0014] According to the present invention, a variable limit compression clamp is provided on the side wall of the upper limit clamp for installing the clamping slider, and the square hole is connected to one of the slider grooves.

[0015] According to the present invention, a variable limit compression clamp is provided, wherein a base groove is provided on the upper surface of the clamp base, and a base screw hole is provided at the center of the base groove; the bottom of the lower limit clamp can be embedded in the base groove, and a clamp stud corresponding to the base screw hole is provided at the bottom of the lower limit clamp, and the clamp stud is threadedly connected to the base screw hole.

[0016] The variable limit compression clamp provided by this invention, through the cooperation structure of two clamping sliders and springs, can clamp the workpiece by adjusting the contraction of the springs according to the length and width dimensions of the workpiece. Through the sliding engagement between the limiting protrusion on the upper limit clamp and the limiting groove on the lower limit clamp, the height position of the workpiece on the lower limit clamp can be adjusted by rotating the upper limit clamp according to its longitudinal height dimension. Therefore, the variable limit compression clamp provided by this invention can be adjusted according to the length, width, and height dimensions of the workpiece, making it suitable for clamping various workpiece sizes and thus having a wider range of applications. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the split structure of the variable limit compression clamp of the present invention;

[0019] Figure 2 This is a schematic diagram of the clamp base, lower limit clamp, and upper limit clamp in the variable limit compression clamp of the present invention after assembly and in the maximum limit state.

[0020] Figure 3 This is a schematic diagram of the fixture base, lower limit fixture and upper limit fixture in the minimum limit state after assembly in the variable limit compression fixture of the present invention.

[0021] Figure 4 This is an isometric view of the upper limit clamp in the variable limit compression clamp of the present invention;

[0022] Figure 5 This is a first cross-sectional view of the upper limit clamp in the variable limit compression clamp of the present invention;

[0023] Figure 6 This is a second sectional view of the upper limit clamp in the variable limit compression clamp of the present invention;

[0024] Figure 7 This is a front view of the lower limit clamp in the variable limit compression clamp of the present invention;

[0025] Figure 8 This is an isometric view of the variable limit compression fixture of the present invention in its maximum limit state after the upper limit fixture and the lower limit fixture are assembled.

[0026] Figure 9 This is a front view of the variable limit compression fixture of the present invention after the upper limit fixture and the lower limit fixture are assembled and in the maximum limit state;

[0027] Figure 10 This is an isometric view of the variable limit compression fixture of the present invention in its minimum limit state after the upper limit fixture and the lower limit fixture are assembled.

[0028] Figure 11 This is a front view of the variable limit compression fixture of the present invention in its minimum limit state after the upper limit fixture and the lower limit fixture are assembled.

[0029] Figure 12 This is a schematic diagram of the clamping slider and spring assembly in the variable limit compression fixture of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Compression clamp housing; 101. Guide hole; 102. Mounting chamber; 103. Baffle slide rail; 104. Base slide groove;

[0032] 2. Outer shell baffle; 201. Baffle slide groove;

[0033] 3. Fixture base; 301. Base groove; 302. Base screw hole; 303. Base slide rail;

[0034] 4. Lower limit clamp; 401. Circular groove; 402. Limiting slide; 403. Clamp stud;

[0035] 5. Upper limit clamp; 501. Rectangular opening; 502. Limiting protrusion; 503. Slider groove; 504. Inner wall groove; 505. Inner wall buckle; 506. Square hole:

[0036] 6. Clamping the slider; 601. Slider buckle;

[0037] 7. Spring; 701. Spring clip. Detailed Implementation

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 limiting this invention.

[0040] 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 the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] like Figures 1 to 12 As shown, the variable limit compression clamp of this invention includes at least a clamp base 3, a lower limit clamp 4, an upper limit clamp 5, and two clamping sliders 6 arranged opposite to each other. Both the lower limit clamp 4 and the upper limit clamp 5 are circular structures.

[0042] The lower limit fixture 4 has a circular groove 401 on its upper surface for placing the workpiece, and two limiting grooves 402 on its outer side wall. Each limiting groove 402 is an arc-shaped groove that spirals upward from bottom to top. The upper limit fixture 5 has a rectangular opening 501 on its upper surface, and two limiting protrusions 502 on its inner side wall. Each limiting protrusion 502 slides and engages with a corresponding limiting groove 402, allowing the upper limit fixture 5 to be rotatably mounted on the lower limit fixture 4. In other words, by sliding the limiting protrusions 502 and the limiting grooves 402, the longitudinal height of the upper limit fixture 5 on the lower limit fixture 4 can be adjusted, thus adapting to workpieces of different heights (or thicknesses).

[0043] Two clamping sliders 6 are respectively installed at the rectangular opening 501, and springs 7 are respectively installed on opposite sides of the two clamping sliders 6. The springs 7 provide clamping force to each clamping slider 6, thereby reliably clamping the workpiece through the two clamping sliders 6, thus adapting to workpieces of different lengths and widths.

[0044] When in use, the workpiece is passed through the rectangular opening 501 on the upper limit fixture 5 and placed on the circular groove 401 on the lower limit fixture 4. Then, the longitudinal height position of the upper limit fixture 5 on the lower limit fixture 4 is adjusted according to the actual height of the workpiece so that the two clamping sliders 6 can reliably clamp the workpiece.

[0045] Therefore, the variable limit compression fixture of this invention can be adjusted according to the length, width, and height of the workpiece. The two clamping sliders 6 and the spring 7 work together to clamp the workpiece by adjusting the contraction of the spring 7 according to its length and width. Furthermore, the sliding engagement between the limiting protrusion 502 on the upper limit fixture 5 and the limiting groove 402 on the lower limit fixture 4 allows the workpiece's height on the lower limit fixture 4 to be adjusted by rotating the upper limit fixture 5 according to its longitudinal height. This makes the variable limit compression fixture suitable for clamping various workpiece sizes, thus broadening its applicability.

[0046] Specifically, by installing a spring 7 on the clamping slider 6, not only can a reliable clamping force be provided for the workpiece, but it also has buffering and vibration-absorbing properties, which can suppress the lateral displacement of the workpiece and improve machining accuracy. The spring 7 can be made of low-manganese spring steel, carbon steel, or chrome vanadium steel, etc.

[0047] Of course, in addition to using spring 7 to provide clamping force to clamping slider 6, the variable limit compression clamp of the present invention embodiment can also use hydraulic cylinder, air cylinder or screw transmission mechanism to provide clamping force to clamping slider 6.

[0048] Specifically, a base groove 301 is provided on the upper surface of the fixture base 3, and a base screw hole 302 is provided at the center of the base groove 301. The bottom of the lower limit fixture 4 can be embedded in the base groove 301, and a fixture stud 403 corresponding to the base screw hole 302 is provided at the bottom of the lower limit fixture 4. The fixture stud 403 is threadedly connected to the base screw hole 302, thereby realizing the reliable assembly of the lower limit fixture 4 on the fixture base 3.

[0049] Of course, in addition to threaded connection, the lower limit clamp 4 and the clamp base 3 can also be connected by riveting, gluing or welding.

[0050] In some embodiments of the present invention, the variable limit compression fixture further includes a compression fixture housing 1, with a guide hole 101 at the upper end of the compression fixture housing 1, and a mounting chamber 102 for mounting the fixture base 3 inside the compression fixture housing 1, the guide hole 101 communicating with the mounting chamber 102. That is, by providing the guide hole 101 on the compression fixture housing 1, the compression head can be guided into the mounting chamber 102, thereby compressing the workpiece.

[0051] Specifically, the compression fixture housing 1 has a rectangular shell structure. The lower parts of the left and right side plates of the compression fixture housing 1 are respectively provided with fixture base mounting ports. Outer shell baffles 2 for sealing the fixture base mounting ports are slidably installed on the left and right side plates respectively. That is, the fixture base 3 can be inserted into the mounting chamber 102 through either fixture base mounting port. Then, by sliding the two outer shell baffles 2 downwards, the fixture base mounting ports on the left and right sides of the compression fixture housing 1 are sealed respectively, preventing the fixture base 3 from moving during the experiment.

[0052] Two vertically extending baffle rails 103 are provided on the outer surfaces of the left and right side plates of the compression fixture housing 1, and two baffle grooves 201 are provided on the inner surfaces of each housing baffle 2. Each baffle groove 201 slides in accordance with each baffle rail 103, thereby achieving reliable sliding installation of the housing baffle 2 on the compression fixture housing 1.

[0053] The compression fixture housing 1 has base grooves 104 on the inner sides of its front and rear side plates, and base rails 303 on opposite sides of its base 3. Each base rail 303 can slide and engage with its respective base groove 104. This sliding engagement between the base rails 303 and the base grooves 104 allows for easy insertion and removal of the base 3 from the compression fixture housing 1, thus enabling separate installation of the compression fixture housing 1 and the base 3. When a workpiece needs to be clamped, the base 3 is removed from the compression fixture housing 1; after clamping, it is reinserted into the compression fixture housing 1, thereby improving the efficiency of workpiece clamping.

[0054] When the fixture base 3 is installed into the outer shell 1 of the compression fixture, the front and rear sides of the fixture base 3 are respectively limited by the cooperation structure of the base slide rail 303 and the base slide groove 104, and the left and right sides of the fixture base 3 are respectively limited by the outer shell baffle 2, so as to prevent the position of the fixture base 3 from moving when compressing the workpiece, and further improve the processing accuracy.

[0055] Specifically, the material of the compression fixture housing 1 includes, but is not limited to, metal materials such as carbon steel, cast iron, or aluminum alloy. When it is necessary to observe the experimental process or test details during the experiment, the compression fixture housing 1 can also be made of transparent material, and a simple magnifying glass can be mounted on the transparent compression fixture housing 1.

[0056] Specifically, the material of the outer shell baffle 2 includes, but is not limited to, metal. When it is necessary to observe the experimental process or test details during the experiment, the outer shell baffle 2 can also be made of transparent material, and a simple magnifying glass can be installed on the transparent outer shell baffle 2.

[0057] In some embodiments of the present invention, slider grooves 503 are provided on the left and right sides of the rectangular opening 501 of the upper limit fixture 5, and the left and right ends of each clamping slider 6 are respectively slidably engaged with the two slider grooves 503, so that each clamping slider 6 can slide back and forth at the rectangular opening 501, thereby facilitating the clamping of the workpiece.

[0058] The rectangular opening 501 has inner wall grooves 504 on its front and rear sides, and the two clamping sliders 6 can be retracted into the two inner wall grooves 504 respectively, so that there is a larger clamping space between the two clamping sliders 6.

[0059] Each clamping slider 6 is connected to a corresponding inner wall groove 504 by two springs 7. Each spring 7 has a spring clip 701 at both ends. An inner wall clip 505, compatible with the spring clip 701, is located in the inner wall groove 504. A slider clip 601, compatible with the spring clip 701, is located on the clamping slider 6. One end of each spring 7 is detachably connected to the inner wall clip 505 via the spring clip 701, and the other end is detachably connected to the slider clip 601 via the spring clip 701. This detachable installation method between the clamping slider 6 and the springs 7 facilitates disassembly of both components, enabling regular maintenance or replacement.

[0060] In addition to the snap-fit ​​connection mentioned above, the connection methods for the two ends of the spring 7 can also include threaded connection, adhesive bonding or welding.

[0061] In this configuration, each spring 7 is normally in a relaxed state. When each clamping slider 6 needs to clamp the workpiece, the spring 7 is compressed by force, which drives the clamping slider 6 to slide along the slider groove 503 and can retract into the two inner wall grooves 504.

[0062] Furthermore, a square hole 506 for mounting the clamping slider 6 is provided on the side wall of the upper limit clamp 5. This square hole 506 can communicate with one of the slider grooves 503. That is, the clamping slider 6 can be assembled into the rectangular opening 501 through the square hole 506, so that both ends of the clamping slider 6 can be respectively inserted into the two slider grooves 503 for sliding engagement. When each spring 7 is in the normal relaxed state, the two clamping sliders 6 are respectively located on both sides of the square hole 506, so the setting position of the square hole 506 does not affect the working state of the clamping slider 6.

[0063] It should be noted that the variable limit compression fixture of this invention is suitable for workpieces requiring compression processing. The workpiece dimensions include, but are not limited to, length and width within 15×15mm, and thickness ranging from 2.5 to 7.5mm. The types of workpieces include, but are not limited to, magnesium-based composite materials, high-entropy alloys, ceramic materials, etc.

[0064] The materials of all parts of the variable limit compression clamp include, but are not limited to, metal materials. When the experimental compression load is low, polymer materials or ceramic materials can be used instead.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable limit compression clamp, characterized in that, The fixture includes at least a fixture base, a lower limit fixture, an upper limit fixture, and two opposing clamping sliders. Both the lower and upper limit fixtures are circular. The lower limit fixture has two limiting grooves on its outer side wall, each groove being an arc-shaped groove spiraling upwards from bottom to top. The upper limit fixture has two limiting protrusions on its inner side wall, each protrusion corresponding to and slidingly engaging with a limiting groove, allowing the upper limit fixture to be rotatably mounted on the lower limit fixture. The upper end face of the lower limit fixture has a circular groove for placing the workpiece, and the upper end face of the upper limit fixture has a rectangular opening. The two clamping sliders are respectively installed at the rectangular opening, and springs are installed on opposite sides of each clamping slider. The workpiece is passed through the rectangular opening on the upper limit fixture and placed on the circular groove on the lower limit fixture. The longitudinal height position of the upper limit fixture on the lower limit fixture is adjusted according to the actual height of the workpiece so that the two clamping sliders can reliably clamp the workpiece. It also includes a compression clamp housing, in which a mounting chamber for mounting the clamp base is provided, and a guide hole is provided at the upper end of the compression clamp housing, the guide hole communicating with the mounting chamber; The compression clamp housing is a rectangular shell structure. The lower part of the left and right side plates of the compression clamp housing are respectively provided with clamp base mounting ports. The outer shell baffles for sealing the clamp base mounting ports are slidably installed on the left and right side plates respectively. Two vertically extending baffle slide rails are provided on the outer surfaces of the left side plate and the right side plate, and two baffle slide grooves are provided on the inner surfaces of each outer shell baffle, with each baffle slide groove corresponding to and slidingly engaging with each baffle slide rail. The inner sides of the front and rear side plates of the compression fixture housing are respectively provided with base slide grooves, and the opposite sides of the fixture base are respectively provided with base slide rails, and each base slide rail can slide and engage with each base slide groove.

2. The variable limit compression clamp according to claim 1, characterized in that, Slider grooves are provided on the left and right sides of the rectangular opening, and the left and right ends of each clamping slider are respectively slidably engaged with the two slider grooves.

3. The variable limit compression clamp according to claim 2, characterized in that, The rectangular opening has inner wall grooves on its front and rear sides, and the two clamping sliders can retract into the two inner wall grooves respectively.

4. The variable limit compression clamp according to claim 3, characterized in that, Two springs are installed between each clamping slider and the corresponding inner wall groove. Each spring has a spring buckle at both ends. An inner wall buckle adapted to the spring buckle is provided in the inner wall groove. A slider buckle adapted to the spring buckle is provided on the clamping slider. One end of the spring is detachably connected to the inner wall buckle through the spring buckle, and the other end of the spring is detachably connected to the slider buckle through the spring buckle.

5. The variable limit compression clamp according to claim 2, characterized in that, The upper limit fixture has a square hole on its side wall for mounting the clamping slider, and the square hole is connected to one of the slider grooves.

6. The variable limit compression clamp according to any one of claims 1 to 5, characterized in that, A base groove is provided on the upper surface of the fixture base, and a base screw hole is provided at the center of the base groove; the bottom of the lower limit fixture can be embedded in the base groove, and a fixture stud corresponding to the base screw hole is provided at the bottom of the lower limit fixture, and the fixture stud is threadedly connected to the base screw hole.

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