Self-centering clamp for rotating shaft
By designing a self-centering fixture for rotating shafts, multiple workpieces can be fixed simultaneously using a base and transmission components. This solves the problem that existing fixtures cannot fix multiple workpieces at the same time, thereby improving production efficiency and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-03-17
AI Technical Summary
Existing fixtures cannot hold multiple workpieces at the same time, causing frequent downtime of processing equipment, affecting production efficiency and increasing costs.
Design a self-centering shaft fixture that uses multiple pairs of slots and pressure blocks on the base to achieve simultaneous fixing and disassembly of multiple workpieces using a transmission component, thereby reducing the frequency of disassembly and fixing.
This allows for the simultaneous fixing of multiple workpieces, reducing downtime of processing equipment, improving production efficiency, and lowering production costs.
Smart Images
Figure CN223997843U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of clamping equipment technology, specifically relating to a self-centering clamp for rotating shafts. Background Technology
[0002] Fixtures are tools used to position and hold workpieces, and are widely used in manufacturing. They can reduce manual operation time and improve production efficiency.
[0003] However, current fixtures typically only hold one workpiece at a time, not multiple workpieces simultaneously. Specifically, after a processing machine completes processing a workpiece, a worker must remove it before the next workpiece can be secured. However, for worker safety, the processing machine must be stopped during workpiece removal, resulting in long cumulative downtime, low processing efficiency, and high production costs.
[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a self-centering clamp for the rotating shaft.
[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0006] The purpose of this utility model is to provide a self-centering shaft fixture that can fix multiple products at once, reducing the frequency of disassembling and fixing workpieces, thereby reducing downtime of processing equipment, improving production efficiency, and reducing production costs.
[0007] To achieve the above objectives, a specific embodiment of this utility model provides a self-centering clamp for a rotating shaft, including a base with multiple pairs of slots. The self-centering clamp for the rotating shaft also includes a pressure block located between a pair of slots. A pressure plate matching the pair of slots is fixedly connected to the opposite side wall of the pressure block. A bolt is threaded onto the pressure block, and the bolt passes through the pressure block and is threaded onto the base.
[0008] In one or more embodiments of this utility model, there are two pairs of card slots, and corner grooves are formed on the card slots.
[0009] In one or more embodiments of this utility model, a pair of sliding columns are integrally formed on the pressure block, and a sliding groove matching the sliding columns is provided on the base, and the sliding columns are slidably connected to the sliding groove.
[0010] In one or more embodiments of this utility model, the slots are in pairs, and the pressure plate is an elastic plate.
[0011] In one or more embodiments of this utility model, a transmission groove is provided on the base, and a transmission component for driving the bolt to rotate is installed in the transmission groove.
[0012] In one or more embodiments of the present invention, the transmission assembly includes a first rotating shaft, a first bearing is fixedly connected to the first rotating shaft, the end of the first bearing away from the first rotating shaft is fixedly connected to the bottom wall of the transmission groove, and a second rotating shaft that matches a bolt is rotatably connected to the first rotating shaft, the bolt being threadedly connected to the second rotating shaft.
[0013] In one or more embodiments of this utility model, a first gear is fixedly connected to the first rotating shaft, and a second gear that meshes with the first gear is fixedly connected to the second rotating shaft.
[0014] In one or more embodiments of this utility model, a locking groove is provided on the second rotating shaft, and an internal thread matching the bolt is provided on the groove wall of the locking groove, and the threads on the pair of pressure blocks rotate in opposite directions.
[0015] In one or more embodiments of this utility model, a second bearing is fixedly connected to the second rotating shaft, and the outer ring of the second bearing is embedded in the base.
[0016] In one or more embodiments of this utility model, a fixing block is fixedly connected to the base, the fixing block has a threaded hole, and a sealing ring is fixedly connected to the lower end face of the fixing block.
[0017] Compared with the prior art, the self-centering clamp of the rotating shaft of this utility model can fix multiple products at one time, reduce the frequency of disassembling and fixing workpieces, thereby reducing the downtime of processing equipment, improving production efficiency and reducing production costs. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of a self-centering clamp for a rotating shaft in one embodiment of the present invention;
[0020] Figure 2 This is a cross-sectional view of a self-centering clamp for a rotating shaft according to an embodiment of the present invention. Figure 1 ;
[0021] Figure 3for Figure 2 Schematic diagram of the structure at point A;
[0022] Figure 4 This is a cross-sectional view of a self-centering clamp for a rotating shaft according to an embodiment of the present invention. Figure 2 ;
[0023] Figure 5 This is a top view of a self-centering clamp for rotating shafts according to an embodiment of the present invention;
[0024] Figure 6 This is a diagram showing the usage state of a self-centering clamp for a rotating shaft according to an embodiment of the present invention;
[0025] Figure 7 This is a schematic diagram of the structure of a self-centering shaft fixture mounted on a workbench according to one embodiment of the present invention.
[0026] Explanation of key figure labels:
[0027] 1. Base; 11. Slot; 111. Angle groove; 12. Fixing block; 121. Threaded hole; 13. Transmission groove; 14. Slide groove; 2. Pressure block; 21. Pressure plate; 22. Bolt; 23. Sliding column; 3. First rotating shaft; 31. First gear; 32. First bearing; 4. Second rotating shaft; 41. Second gear; 42. Locking groove; 421. Internal thread; 43. Second bearing. Detailed Implementation
[0028] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments 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.
[0029] like Figure 1 and Figure 6 As shown, a self-centering clamp for a rotating shaft according to one embodiment of the present invention includes a base 1, on which multiple pairs of slots 11 are formed. The self-centering clamp for the rotating shaft also includes a pressure block 2, which is located between a pair of slots 11. Each of the opposite sidewalls of the pressure block 2 has an integrally formed pressure plate 21 that matches the slot 11. A bolt 22 is threadedly connected to the pressure block 2, and the bolt 22 passes through the pressure block 2 and is threadedly connected to the base 1.
[0030] Specifically, the two workpieces are placed into a pair of slots 11 respectively, and the bolts 22 are turned clockwise. The bolts 22 press on the pressure block 2, and a pair of pressure plates 21 press on the workpieces. The two workpieces are fixed in a pair of slots 11, which can fix the two workpieces at one time.
[0031] Preferably, the base 1 has two pairs of slots 11, which can clamp four workpieces at a time, allowing for processing of four workpieces simultaneously, reducing equipment downtime and improving production efficiency.
[0032] Furthermore, in order to prevent the pressure block 2 from rotating with the bolt 22 when the bolt 22 is tightened, a pair of sliding columns 23 are integrally formed on the pressure block 2, and a sliding groove 14 matching the sliding column 23 is provided on the base 1, and the sliding column 23 is slidably connected to the sliding groove 14.
[0033] Specifically, the sliding column 23 can only slide up and down within the sliding groove 14, which restricts the pressure block 2 and prevents the pressure block 2 from rotating with the bolt 22 when the bolt 22 is turned, so that the pressure plate 21 can be accurately pressed onto the workpiece.
[0034] Meanwhile, a corner groove 111 is provided on the slot 11. When one corner of the workpiece is a right angle, the right angle on the workpiece can be placed in the corner groove 111 to prevent the right angle from damaging the workpiece.
[0035] Furthermore, the pressure plate 21 is an elastic plate. When the pressure between the pressure plate 21 and the workpiece is too great, the pressure plate 21 can undergo elastic deformation to prevent the excessive pressure from damaging the workpiece and to protect the workpiece.
[0036] In order to simultaneously fix the workpieces in the four slots 11, such as Figures 2 to 5 As shown, a transmission groove 13 is provided on the base 1, and a transmission assembly for driving the bolt 22 to rotate is installed in the transmission groove 13. The transmission assembly includes a first rotating shaft 3, on which a first bearing 32 is welded. The end of the first bearing 32 away from the first rotating shaft 3 is welded to the bottom wall of the transmission groove 13. A pair of second rotating shafts 4 are rotatably connected to the first rotating shaft 3, and the bolt 22 is threadedly connected to the second rotating shafts 4. When the first rotating shaft 3 rotates, it drives the pair of second rotating shafts 4 to rotate. When the second rotating shafts 4 rotate, they engage with the bolt 22 threadedly, causing the pressure block 2 to move away from or closer to the base 1, thereby fixing the workpiece in the four slots 11.
[0037] Specifically, a first gear 31 is welded onto the first rotating shaft 3, and a second gear 41 that meshes with the first gear 31 is welded onto the second rotating shaft 4. A locking groove 42 is provided on the second rotating shaft 4, and the groove wall of the locking groove 42 has an internal thread 421 that matches the bolt 22. When the first rotating shaft 3 rotates, the first gear 31 meshes with the pair of second gears 41, driving the second rotating shaft 4 to rotate. Two situations may occur when the second rotating shaft 4 rotates:
[0038] In the first case, the bolt 22 does not rotate with the second rotating shaft 4. The internal thread 421 and the bolt 22 are threaded together, and the bolt 22 gradually enters the locking groove 42, thereby pressing the pressure block 2. The pressure plate 21 on the pressure block 2 presses the workpiece in the slot 11.
[0039] The second method involves the friction between the bolt 22 and the internal thread 421 causing the bolt 22 to rotate with the second rotating shaft 4. At this time, the pressure block 2 is restricted from rotating by the sliding column 23. The pressure block 2 and the bolt 22 are threadedly engaged, causing the pressure block 2 to move downward on the bolt 22, which can also press the workpiece in the slot 11.
[0040] Preferably, after the transmission component is installed, the bolt 22 is welded to the pressure block 2, and the pressure block 2 and the bolt 22 are a whole. After the bolt 22 and the internal thread 421 opened on the wall of the locking groove 42 are engaged, the pressure block 2 and the bolt 22 can only move vertically on the base 1, which makes it easier to fix and pick up the workpiece in the slot 11.
[0041] It is worth noting that in the second scenario, when friction occurs between the pressure block 2 and the base 1, an upward force is generated on the second rotating shaft 4, causing it to move upward within the transmission groove 13. This results in the separation of the second gear 41 and the first gear 31, leading to transmission component failure. To address this issue, a second bearing 43 is welded to the second rotating shaft 4, with its outer ring embedded in the base 1. This prevents the second rotating shaft 4 from moving up and down, ensuring that the second gear 41 and the first gear 31 are always threadedly engaged.
[0042] In addition, the threads on the pair of pressure blocks 2 should be opposite in direction. When the first rotating shaft 3 rotates, the opposite threads on the pressure blocks 2 can make the pair of pressure blocks 2 move in the same way when they are close to or away from the base 1.
[0043] Furthermore, such as Figure 7 As shown, a fixing block 12 is integrally formed on the upper part of the base 1. The fixing block 12 has a threaded hole 121, and a sealing ring is bonded to the lower end face of the fixing block 12. Specifically, the self-centering fixture of the rotating shaft is fixed to the worktable by a threaded connection. The sealing ring on the fixing block 12 contacts the worktable and seals the opening of the transmission groove 13, reducing the entry of iron filings generated during workpiece processing into the transmission groove 13 and protecting the transmission components.
[0044] When the self-centering fixture for the rotating shaft is installed on the worktable, a through hole matching the first rotating shaft 3 is opened on the worktable, and a worm gear is welded through the through hole on the worktable. A worm gear meshes with the worm gear, and the worm gear rotates on the worktable. A handwheel is installed on the worm gear, and the first rotating shaft 3 can be rotated by turning the handwheel.
[0045] When in use, four workpieces are placed into the slots 11 respectively. When the first rotating shaft 3 is rotated clockwise, the first rotating shaft 3 drives a pair of second rotating shafts 4 to rotate. After the second rotating shafts 4 rotate, they are driven by the thread of the bolts 22, so that the pressure block 2 is close to the base 1. The pressure plate 21 on the pressure block 2 can clamp the workpieces in the slots 11.
[0046] After processing is complete, rotating the first rotating shaft 3 counterclockwise moves the pressure block 2 away from the base 1, allowing the workpiece to be removed from the slot 11. This allows for the processing of four workpieces at once, reducing downtime and improving work efficiency.
[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A rotary self-centering fixture comprising a base, characterized in that, The base is provided with a plurality of pairs of clamping grooves, the rotating shaft self-centering clamp further comprises a pressing block, the pressing block is located between a pair of clamping grooves, opposite side walls of the pressing block are fixedly connected with a pressing plate matched with a pair of clamping grooves, the pressing block is threadedly connected with a bolt, and the bolt is threadedly connected with the base through the pressing block.
2. A self-centering fixture for a rotating shaft according to claim 1, wherein The clamping grooves are two pairs, and an angle groove is formed in the clamping groove.
3. The self-centering fixture of claim 1, wherein, The pressing block is integrally formed with a pair of sliding columns, the base is provided with a sliding groove matched with the sliding column, and the sliding column is slidably connected in the sliding groove.
4. The self-centering fixture of claim 1, wherein, The clamping grooves are two pairs, and the pressing plate is an elastic plate.
5. A self-centering fixture for rotating shafts according to any one of claims 1 to 4, characterized in that, The base is provided with a transmission groove, and a transmission assembly for driving the bolt to rotate is mounted in the transmission groove.
6. A self-centering fixture for a rotating shaft according to claim 5, wherein The transmission assembly comprises a first rotating shaft, a first bearing is fixedly connected to the first rotating shaft, one end of the first bearing away from the first rotating shaft is fixedly connected to the groove bottom wall of the transmission groove, a second rotating shaft matched with the bolt is rotatably connected to the first rotating shaft, and the bolt is threadedly connected to the second rotating shaft.
7. A self-centering fixture for a rotating shaft according to claim 6, wherein The first rotating shaft is fixedly connected with a first gear, and the second rotating shaft is fixedly connected with a second gear engaged with the first gear.
8. A self-centering fixture for a rotating shaft according to claim 7, wherein The second rotating shaft is provided with a locking groove, an inner thread matched with the bolt is formed in the groove wall of the locking groove, and the thread rotation directions of the two pressing blocks are opposite.
9. A self-centering fixture for a rotating shaft according to claim 8, wherein The second rotating shaft is fixedly connected with a second bearing, and a rotating outer ring of the second bearing is embedded in the base.
10. A self-centering fixture for a rotating shaft according to claim 9, wherein The base is fixedly connected with a fixed block, the fixed block is provided with a threaded hole, and a sealing ring is fixedly connected to the lower end face of the fixed block.