Workpiece clamping tool
The clamping structure, which combines a bottom base, a vertical screw, and an external threaded sleeve, solves the stability and safety issues of circumferential clamps when clamping non-cylindrical workpieces, achieving stable clamping and safe operation of the workpiece.
Patent Information
- Application Number
- CN202520127805.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Existing circumferential clamping fixtures have poor clamping stability when clamping non-cylindrical workpieces, are inconvenient to operate, and lack sufficient safety.
The clamping structure adopts a combination of a bottom base, a vertical screw, and an external threaded sleeve. The external threaded sleeve is driven to rotate by turning the handle, which, together with the upper crossbeam and the lower pressure plate, achieves stable clamping of the workpiece. The external L-shaped stop bar forms an operating gap with the upper crossbeam for guidance and positioning.
It improves the operational stability and safety of small workpieces, facilitates local drilling and grinding operations, and enhances the operational safety of the equipment.
Smart Images
Figure CN223889793U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a workpiece clamping fixture. Background Technology
[0002] When machining workpieces, such as drilling, the workpiece needs to be clamped onto a fixed fixture, currently mostly using circumferential fixtures. Circumferential fixtures have significant advantages; they are generally relatively stable for clamping cylindrical workpieces. However, for workpieces of other shapes, the clamping effect is not good, especially since clamping stability cannot be guaranteed, which naturally compromises the safety of the operator during operation. Furthermore, circumferential fixtures require lifting or other methods to mount the workpiece, which presents several inconveniences during operation. Utility Model Content
[0003] To address the aforementioned problems, this application proposes a workpiece clamping fixture, comprising a bottom base, a vertical screw mounted on the bottom base, an externally threaded sleeve threaded onto the vertical screw, a support plate mounted on the top of the externally threaded sleeve, and a screwing handle mounted on the side of the externally threaded sleeve; an upper crossbeam mounted on the upper part of the support plate, and a lower pressure plate mounted on the upper crossbeam opposite to the support plate. This application uses the externally threaded sleeve and vertical screw mounted on the bottom base as moving parts, which cooperate with the lower pressure plate on the upper crossbeam to perform clamping operations on small workpieces. This allows for localized drilling or grinding of small workpieces, resulting in good workpiece stability and high operational safety during operation.
[0004] Preferably, an outer L-shaped stop bar is also provided on the side of the lower pressure plate, and the outer L-shaped stop bar is fixedly connected to the upper crossbeam.
[0005] Preferably, the outer L-shaped stop bar includes an extended stop bar disposed on the side of the upper crossbeam, a positioning stop bar disposed on one side of the extended stop bar and disposed parallel to the upper crossbeam, and a positioning bearing sleeved at the end of the positioning stop bar, with an operating clearance provided between the positioning bearing and the upper crossbeam. This application, by creating an operating clearance between the outer L-shaped stop bar and the upper crossbeam, can provide a certain guiding and positioning function when drilling operations are required, thereby improving the operational safety of the equipment.
[0006] Preferably, the two sides of the upper crossbeam are fixedly connected to the bottom base by vertical support rods.
[0007] Preferably, the screw handle includes a plurality of external screw rods disposed on the outside of the external threaded sleeve, the external screw rods being in the same plane and evenly distributed; the number of external screw rods is not less than 6.
[0008] Preferably, a removable outer screw sleeve is also provided on the outside of the outer screw rod. By evenly distributing the outer screw rods, this application enables more convenient and labor-saving manipulation of the rotation of the outer threaded sleeve relative to the vertical screw.
[0009] Preferably, a rotary bearing is provided in the middle of the lower pressure plate, and a vertical connecting rod is provided in the middle of the rotary bearing. The vertical connecting rod is fixedly connected to the upper crossbeam.
[0010] Preferably, an operating handle is provided on at least one side of the bottom base, and an extension handle tube is fitted onto the operating handle.
[0011] This application can bring the following beneficial effects:
[0012] 1. This application uses an external threaded sleeve and a vertical screw installed on the bottom base as moving parts. It cooperates with the lower pressure plate on the upper crossbeam to complete the clamping operation of some small workpieces. Then, local drilling or grinding operations can be performed on the small workpieces. The workpiece has good stability and high operation safety during the operation.
[0013] 2. This application creates an operating gap between the outer L-shaped stop bar and the upper crossbeam, which can play a certain guiding and positioning role when drilling is required, thereby improving the operational safety of the equipment.
[0014] 3. By evenly distributing external screw rods, this application enables more convenient and labor-saving manipulation of the rotation of the external threaded sleeve relative to the vertical screw. Attached Figure Description
[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0016] Figure 1 This is a schematic diagram of the structure of this application.
[0017] Figure 2 This is a side view structural diagram of this application. Detailed Implementation
[0018] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with the accompanying drawings, will be provided.
[0019] In the first embodiment, such as Figure 1As shown, a workpiece clamping fixture includes a bottom base 1, a vertical screw 2 on the bottom base 1, an external threaded sleeve 3 threadedly connected to the vertical screw 2, a support plate 4 on the top of the external threaded sleeve 3, and a screw handle 5 on the side of the external threaded sleeve 3; an upper crossbeam 6 on the upper part of the support plate 4, and a lower pressure plate 7 opposite to the support plate 4 on the upper crossbeam 6.
[0020] When in use, place this application on the processing table, then place the small workpiece on the support plate 4, and then screw the external thread sleeve 3 by turning the handle 5. The external thread sleeve 3 rotates relative to the vertical screw 2 and feeds upward until the upper part of the workpiece is pressed against the lower pressure plate 7, thus completing the fixation of the workpiece. This allows for operations such as grinding or drilling of the workpiece in certain areas.
[0021] In the second embodiment, as Figure 1-2 As shown, a workpiece clamping fixture includes a bottom base 1, a vertical screw 2 on the bottom base 1, an external threaded sleeve 3 threadedly connected to the vertical screw 2, a support plate 4 on the top of the external threaded sleeve 3, and a screw handle 5 on the side of the external threaded sleeve 3; an upper crossbeam 6 on the upper part of the support plate 4, and a lower pressure plate 7 opposite to the support plate 4 on the upper crossbeam 6.
[0022] An outer L-shaped stop bar 8 is also provided on the side of the lower pressure plate 7, and the outer L-shaped stop bar 8 is fixedly connected to the upper crossbeam 6. The outer L-shaped stop bar 8 includes an extended stop bar 9 provided on the side of the upper crossbeam 6, and a positioning stop bar 10 provided on one side of the extended stop bar 9, which is parallel to the upper crossbeam 6. A positioning bearing 11 is sleeved on the end of the positioning stop bar 10, and an operating clearance 12 is provided between the positioning bearing 11 and the upper crossbeam 6.
[0023] The upper crossbeam 6 is fixedly connected to the bottom base 1 on both sides by vertical support rods 17.
[0024] The screw handle 5 includes several external screwing rods 14 disposed on the outside of the external threaded sleeve 3. The external screwing rods 14 are located in the same plane and are evenly distributed. The number of external screwing rods 14 is not less than 6. A removable external screwing sleeve 15 is also disposed on the outside of the external screwing rods 14.
[0025] A rotary bearing 16 is provided in the middle of the lower pressure plate 7, and a vertical connecting rod 13 is provided in the middle of the rotary bearing 16. The vertical connecting rod 13 is fixedly connected to the upper crossbeam 6. An operating handle 18 is provided on at least one side of the bottom base 1, and an extension handle tube 19 is fitted onto the operating handle 18.
[0026] In use, place this application on the processing table, then place the small workpiece on the support plate 4, and then screw the external threaded sleeve 3 by external screwing rod 14 or by external screwing sleeve 15. The external threaded sleeve 3 rotates relative to the vertical screw 2 and feeds upward until the upper part of the workpiece is pressed against the lower pressure plate 7. Since the lower pressure plate 7 is connected to the vertical connecting rod 13 through the rotary bearing 16, its position can be adjusted to better hold the workpiece, thus completing the fixation of the workpiece. This allows for local grinding or drilling operations on the workpiece. For drilling operations, the operating gap 12 formed between the L-shaped stop bar and the upper crossbeam 6 can play a certain guiding and positioning role, improving the operation safety of the equipment.
[0027] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A workpiece clamping fixture, characterized in that: It includes a bottom base, a vertical screw on the bottom base, an external threaded sleeve threaded to the vertical screw, a support plate on the top of the external threaded sleeve, and a screw handle on the side of the external threaded sleeve; an upper crossbeam on the upper part of the support plate, and a lower pressure plate opposite to the support plate on the upper crossbeam.
2. The workpiece clamping fixture as described in claim 1, characterized in that: An outer L-shaped stop bar is also provided on the side of the lower pressure plate, and the outer L-shaped stop bar is fixedly connected to the upper crossbeam.
3. The workpiece clamping fixture as described in claim 2, characterized in that: The outer L-shaped stop bar includes an extended stop bar disposed on the side of the upper crossbeam, a positioning stop bar disposed on one side of the extended stop bar and disposed parallel to the upper crossbeam, a positioning bearing sleeved at the end of the positioning stop bar, and an operating clearance disposed between the positioning bearing and the upper crossbeam.
4. The workpiece clamping fixture as described in claim 1, characterized in that: The upper crossbeam is fixed to the bottom base on both sides by vertical support rods.
5. The workpiece clamping fixture as described in claim 1, characterized in that: The screwing handle includes several external screwing rods disposed on the outside of the external threaded sleeve. The external screwing rods are located in the same plane and are evenly distributed. The number of external screwing rods is not less than 6.
6. The workpiece clamping fixture as described in claim 5, characterized in that: An externally removable external screwing sleeve is also provided on the outside of the external screwing rod.
7. The workpiece clamping fixture as described in claim 1, characterized in that: A rotary bearing is provided in the middle of the lower pressure plate, and a vertical connecting rod is provided in the middle of the rotary bearing. The vertical connecting rod is fixedly connected to the upper crossbeam.
8. The workpiece clamping fixture as described in claim 1, characterized in that: An operating handle is provided on at least one side of the bottom base, and an extension handle tube is fitted onto the operating handle.