A portable positioning fixture

Abstract

The utility model is suitable for positioning fixture technical field provides a movable positioning fixture, including bottom plate structure, the bottom plate structure installs the positioning pin structure, the upper portion of positioning pin structure is provided with work piece subassembly, the side of work piece subassembly is provided with two sets of positioning seat, two sets positioning seat's respectively corresponding set up has a group of side top locking block, the middle position of work piece subassembly and bottom plate structure is provided with a plurality of positioning column, the bottom plate structure includes bottom plate body, the bottom plate body is opened and is provided with mounting hole, the positioning pin structure sets up in the inside of mounting hole, and positioning pin passes through spring telescopic and pin slip design, can adapt to different size positioning hole, need not to replace corresponding specification pin, adapt to multi -specification work piece, and elastic connection replaces rigid fixing, allow pin reasonable fine adjustment, avoid the work piece deformation, installation jamming caused by positioning too tight, reduce work piece scrap risk.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, and more specifically, to a movable positioning fixture. Background Technology

[0002] In the fields of machining, from lathe cutting and milling to CNC precision milling, the positioning accuracy of the fixture directly determines the accuracy of the workpiece's reference surface. The positioning accuracy and clamping stability of the fixture have a crucial impact on the machining quality throughout the entire process and are key prerequisites for ensuring process compliance and product consistency.

[0003] However, traditional fixtures often suffer from problems such as a single positioning method or over-constraint when positioning and clamping workpieces with holes, resulting in low clamping efficiency and insufficient positioning accuracy, which affects the subsequent processing steps. A movable positioning fixture is proposed to improve the existing problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a movable positioning clamp.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A movable positioning fixture includes a base plate structure, on which a positioning pin structure is installed. A workpiece assembly is disposed above the positioning pin structure. Two sets of positioning seats are disposed on one side of the workpiece assembly. Each of the two sets of positioning seats is provided with a set of side top locking blocks. Several positioning posts are disposed at the middle position between the workpiece assembly and the base plate structure.

[0006] The base plate structure includes a base plate body, on which mounting holes are provided, and the positioning pin structure is disposed inside the mounting holes.

[0007] The workpiece assembly includes a workpiece body, and a positioning hole is provided at the bottom of the workpiece body. The positioning pin structure corresponds to the positioning hole.

[0008] The positioning pin structure includes a connecting seat and a pin that slides along the inside of the connecting seat.

[0009] The present invention is further configured such that: the positioning pin structure also includes a mounting base, the mounting base is disposed inside the mounting hole, and the mounting base is fixedly installed inside the mounting hole by bolts, and a spring is provided at the middle position of the mounting base.

[0010] The present invention is further configured such that: a fixing groove is provided on the mounting base, the shape of the fixing groove is adapted to the shape of the connecting base, the connecting base is disposed inside the fixing groove, the spring is disposed inside the connecting base, and the top end of the spring is fixedly connected to the bottom of the pin.

[0011] The present invention is further configured such that: the connecting seat includes a base, the base has an installation groove inside, the top of the base has a connecting block, the connecting block and the base are integrally formed, and the connecting block has a through groove inside, the groove being connected to the installation groove.

[0012] The present invention is further configured such that: the pin includes a mounting block, the mounting block has a limiting hole inside, the limiting hole is used to fix the top end of the spring, and the limiting hole is located inside the mounting groove.

[0013] The present invention is further configured such that: a connecting post is provided on the top of the mounting block, the shape of the connecting post is adapted to the shape of the sliding groove, and the connecting post slides along the inside of the sliding groove.

[0014] The present invention is further configured such that: a positioning block is provided at the top of the connecting column, the positioning block is shaped as an inverted cone, the top of the positioning block is provided with a chamfer, and the positioning block and the connecting column are integrally formed.

[0015] In summary, this application includes at least one of the following beneficial technical effects: The chamfered design of the positioning block forms a guiding transition surface, reducing the possibility of jamming and improving placement alignment efficiency. The positioning pin, through spring extension and pin sliding design, can adapt to positioning holes of different sizes without the need to replace the corresponding specification pin, adapting to multiple specifications of workpieces. Moreover, the elastic connection replaces rigid fixation, allowing reasonable fine adjustment of the pin, avoiding workpiece deformation and installation jamming caused by excessive positioning, and reducing the risk of workpiece scrap. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a movable positioning clamp according to the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of the explosion structure.

[0018] Figure 3 for Figure 2 A bottom view.

[0019] Figure 4 This is a schematic diagram of the positioning pin structure in this utility model.

[0020] Figure 5 for Figure 4A schematic diagram of the explosion structure.

[0021] Figure 6 This is a schematic diagram of the connecting seat in this utility model.

[0022] Figure 7 for Figure 6 A bottom view.

[0023] Figure 8 This is a schematic diagram of the pin structure in this utility model.

[0024] Figure 9 for Figure 8 A bottom view. Explanation of reference numerals in the attached drawings: 1. Base plate structure; 11. Base plate body; 12. Mounting holes; 2. Workpiece assembly; 21. Workpiece body; 22. Positioning hole; 3. Positioning seat; 4. Positioning post; 5. Side top locking block; 6. Positioning pin structure; 61. Mounting base; 62. Spring; 63. Connecting base; 631. Base; 632. Connecting block; 633. Slide groove; 634. Mounting groove; 64. Pin; 641. Mounting block; 642. Connecting post; 643. Positioning block; 644. Limiting hole. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] Please see Figures 1-9 The present invention provides the following technical solution: Example 1, see Figure 1 A movable positioning fixture includes a base plate structure 1, a positioning pin structure 6 installed on the base plate structure 1, a workpiece assembly 2 arranged above the positioning pin structure 6, two sets of positioning seats 3 arranged on one side of the workpiece assembly 2, a set of side top locking blocks 5 respectively arranged on the two sets of positioning seats 3, and a number of positioning posts 4 arranged in the middle position between the workpiece assembly 2 and the base plate structure 1.

[0028] The positioning seat 3 includes a positioning part and a fixing part. The positioning part can slide along the fixing part. After the positioning is determined, it can be fixed and locked by bolts.

[0029] The positioning column 4 includes a column and a top block. The top block is set in a conical shape and can position the workpiece assembly 2.

[0030] The side-top locking block 5 includes a main body base, a slidable side-top push rod, a wedge-shaped locking assembly, a reset elastic element, and a screw. Before processing, the side-top push rod is driven by external force to move laterally toward the workpiece, so that the end of the push rod is in contact with the positioning surface of the workpiece assembly 2 to achieve pre-positioning. Then, the wedge-shaped locking assembly clamps the push rod under the tightening action of the screw, forming a reliable lock to resist the cutting force and vibration during processing and prevent workpiece displacement. After processing, the unlocking mechanism releases the locking state, and the elastic element drives the push rod to reset, which facilitates the picking and placing of the workpiece and ensures the lateral positioning accuracy and processing stability of the workpiece.

[0031] The positioning pin structure 6 allows for flexible positioning of the workpiece assembly 2, improving the versatility of the fixture positioning.

[0032] See Figure 2 The base plate structure 1 includes a base plate body 11, on which mounting holes 12 are provided, and a positioning pin structure 6 is disposed inside the mounting holes 12.

[0033] See Figure 2 and Figure 3 The workpiece assembly 2 includes a workpiece body 21, and a positioning hole 22 is provided at the bottom of the workpiece body 21. The positioning pin structure 6 corresponds to the positioning hole 22.

[0034] See Figure 4 and Figure 5 The positioning pin structure 6 includes a connecting seat 63 and a pin 64 that slides along the inside of the connecting seat 63.

[0035] See Figure 4 and Figure 5 The positioning pin structure 6 also includes a mounting base 61, which is disposed inside the mounting hole 12 and is fixedly installed inside the mounting hole 12 by bolts. A spring 62 is provided in the middle position of the mounting base 61.

[0036] See Figure 4 and Figure 5 The mounting base 61 is provided with a fixing groove, the shape of which is adapted to the shape of the connecting base 63. The connecting base 63 is located inside the fixing groove, and the spring 62 is located inside the connecting base 63. The top of the spring 62 is fixedly connected to the bottom of the pin 64.

[0037] The pin 64 can slide along the inside of the connecting seat 63. The sliding structure allows the pin 64 to adapt to the positioning requirements of positioning holes 22 of different sizes, without excessively constraining the shape of the workpiece assembly 2. At the same time, a spring 62 connects the mounting seat 61 and the pin 64. Under the action of the spring 62, the pin 64 can be buffered and protected, reducing the possibility of excessive constraint.

[0038] Since the spring 62 has its own elastic deformation capability, when the pin 64 engages with the positioning hole 22 or the workpiece body 21 undergoes slight displacement, it can absorb the impact force through compression or stretching, reduce the hard contact wear between the pin 64 and the workpiece, and at the same time reduce the damage to the workpiece due to excessive positioning force.

[0039] With the help of the telescopic properties of the spring 62, the pin 64 can slide flexibly along the connecting seat 63, which can adapt to the positioning holes 22 of different sizes without the need to replace the corresponding pin 64, thus improving the versatility of the positioning structure.

[0040] The flexible connection method replaces the rigid fixation, allowing the pin 64 to be finely adjusted within a reasonable range. It does not forcibly restrict the shape or installation posture of the workpiece assembly 2, reducing problems such as workpiece deformation and installation jamming caused by excessively tight positioning.

[0041] See Figure 6 and Figure 7 The connecting seat 63 includes a base 631, an installation groove 634 is provided inside the base 631, a connecting block 632 is provided on the top of the base 631, the connecting block 632 and the base 631 are integrally formed, and a sliding groove 633 is provided through the interior of the connecting block 632, which is connected to the installation groove 634.

[0042] See Figure 6 and Figure 7 The pin 64 includes a mounting block 641, and the mounting block 641 is provided with a limiting hole 644 inside. The limiting hole 644 is used to fix the top end of the spring 62 and is located inside the mounting groove 634.

[0043] See Figure 8 and Figure 9 The top of the mounting block 641 is provided with a connecting post 642, the shape of which is adapted to the shape of the slide groove 633, and the connecting post 642 slides along the inside of the slide groove 633.

[0044] See Figure 8 and Figure 9 The top of the connecting column 642 is provided with a positioning block 643. The positioning block 643 is shaped like an inverted cone and has a chamfer on its top. The positioning block 643 and the connecting column 642 are integrally formed.

[0045] The mounting groove 634 provides a mounting cavity for the mounting block 641, and the mounting groove 634 limits the mounting block 641 so that the connecting column 642 can only move in the vertical direction of the slide groove 633, reducing the possibility of the workpiece assembly 2 shifting.

[0046] The side of the positioning block 643 is provided with an inclined surface, which expands the positioning range of the positioning block 643 and can adapt to positioning holes 22 of multiple sizes, thus improving the versatility of the device.

[0047] When the positioning hole 22 of the workpiece assembly 2 is engaged with the positioning block 643, the chamfered conical transition surface can play a guiding role. Even if there is a slight alignment deviation between the positioning hole 22 and the positioning block 643, the chamfer can guide the positioning hole 22 to slide quickly into the conical area of ​​the positioning block 643, avoiding positioning difficulties caused by edge jamming and improving the alignment efficiency and smoothness when placing the workpiece.

[0048] When the workpiece assembly 2 is placed, the chamfered surface reduces the resistance at the moment of contact between the positioning block 643 and the positioning hole 22, allowing the workpiece to fall more smoothly on the positioning post 4 and the positioning block 643, avoiding workpiece bouncing or positional displacement caused by hard contact, and ensuring the stability of the positioning process.

[0049] The guide rail sliding structure, consisting of a positioning block 643, a connecting post 642, a sliding groove 633, a mounting groove 634, and a spring 62, limits the offset of the pin by adapting the connecting post 642 and the sliding groove 633, ensuring the accuracy of the centering of the positioning block 643. Furthermore, the extension and retraction of the spring 62 and the sliding of the pin enable adaptive matching to positioning holes 22 of different specifications, improving the versatility of the fixture. At the same time, the elastic deformation of the spring 62 and the mobility of the sliding structure can buffer and absorb shock, reducing the risk of hard contact wear between the pin and the workpiece and workpiece deformation. The chamfered positioning block 643 combined with the guide sliding design also makes clamping smoother and more efficient.

[0050] Specifically, first, align the center of the positioning hole 22 with the positioning block 643, and use the positioning block 643 to position the workpiece assembly 2. Since the connecting column 642 can slide along the groove 633, it will not over-constrain the shape of the workpiece assembly 2. Next, place the bottom of the workpiece assembly 2 on the positioning column 4, so that one side of the workpiece assembly 2 contacts the positioning seat 3, completing the side and bottom positioning of the workpiece. Finally, adjust the side top locking block 5 and lock it with screws, thereby stably fixing the workpiece assembly 2 on the fixture for subsequent processing operations. The locking force of the side top locking block 5 can be adjusted according to actual needs to ensure the stability of the clamping.

[0051] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A movable positioning clamp, characterized in that: Includes a base plate structure (1), on which a positioning pin structure (6) is installed, and a workpiece assembly (2) is provided above the positioning pin structure (6). Two sets of positioning seats (3) are provided on one side of the workpiece assembly (2), and a set of side top locking blocks (5) are provided on each of the two sets of positioning seats (3). Several positioning posts (4) are provided in the middle position between the workpiece assembly (2) and the base plate structure (1). The base plate structure (1) includes a base plate body (11), and the base plate body (11) is provided with mounting holes (12), and the positioning pin structure (6) is disposed inside the mounting holes (12); The workpiece assembly (2) includes a workpiece body (21), and a positioning hole (22) is provided at the bottom of the workpiece body (21). The positioning pin structure (6) corresponds to the positioning hole (22). The positioning pin structure (6) includes a connecting seat (63) and a pin (64) that slides along the inside of the connecting seat (63).

2. The movable positioning fixture according to claim 1, characterized in that: The positioning pin structure (6) also includes a mounting base (61), which is disposed inside the mounting hole (12) and is fixedly installed inside the mounting hole (12) by bolts. A spring (62) is provided in the middle position of the mounting base (61).

3. A movable positioning fixture according to claim 2, characterized in that: The mounting base (61) is provided with a fixing groove, the shape of which is adapted to the shape of the connecting base (63). The connecting base (63) is located inside the fixing groove, the spring (62) is located inside the connecting base (63), and the top of the spring (62) is fixedly connected to the bottom of the pin (64).

4. A movable positioning fixture according to claim 3, characterized in that: The connecting seat (63) includes a base (631), an installation groove (634) is provided inside the base (631), a connecting block (632) is provided on the top of the base (631), the connecting block (632) and the base (631) are integrally formed, a sliding groove (633) is provided through the interior of the connecting block (632), and the sliding groove (633) is connected to the installation groove (634).

5. A movable positioning fixture according to claim 4, characterized in that: The pin (64) includes a mounting block (641), the mounting block (641) having a limiting hole (644) inside, the limiting hole (644) being used to fix the top end of the spring (62), the limiting hole (644) being located inside the mounting groove (634).

6. A movable positioning fixture according to claim 5, characterized in that: The top of the mounting block (641) is provided with a connecting post (642), the shape of which is adapted to the shape of the slide groove (633), and the connecting post (642) slides along the inside of the slide groove (633).

7. A movable positioning fixture according to claim 6, characterized in that: The top of the connecting column (642) is provided with a positioning block (643), the positioning block (643) is shaped as an inverted cone, the top of the positioning block (643) is provided with a chamfer, and the positioning block (643) and the connecting column (642) are integrally formed.

Images