A fixture with guaranteed positional consistency
By introducing structures such as slides, load-bearing sliders, and rotating dials into the fixture, the problems of positioning deviation and operational complexity when adapting to various types of workpieces using traditional fixtures are solved, achieving consistency and rapid adaptation of workpiece position.
Patent Information
- Application Number
- CN202522156315.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-13
AI Technical Summary
Traditional fixtures are time-consuming to change to customized special fixtures when adapting to various types of workpieces and are prone to positioning deviations. General-purpose adjustable fixtures have complex structures, high operating thresholds and lack intuitive scale markings, resulting in large positional deviations.
Design a fixture that ensures consistent positional accuracy. It uses evenly distributed grooves and load-bearing sliders on a base, combined with adjusting screws, rotating shafts, and rotating dials. It has intuitive scale markings and can adapt to workpieces of various shapes through multi-faceted clamping blocks. It uses limit bolts and support feet to absorb vibration and achieve precise positioning and angle adjustment.
It enables rapid adaptation of workpieces of various shapes, reduces changeover time, avoids positioning deviations, reduces operational complexity, and ensures the consistency of positional accuracy of batch workpieces.
Smart Images
Figure CN224674847U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining, and more specifically, to a fixture that ensures consistent positional accuracy. Background Technology
[0002] In the field of machining and assembly, fixtures are crucial for ensuring the consistency of workpiece position. However, traditional fixtures have some limitations: on the one hand, customized special fixtures can only be adapted to workpieces of a single shape. When machining multiple types of workpieces, the entire set of fixtures needs to be changed frequently, which is time-consuming and prone to introducing positioning deviations due to datum switching; on the other hand, although general-purpose adjustable fixtures can be adapted to multiple shapes, they often rely on complex hydraulic or electric adjustment components, which are cumbersome in structure, have a high operating threshold, and lack intuitive scale markings. They require adjustment based on the operator's experience, resulting in large fluctuations in the positional deviation of batch workpieces.
[0003] How to invent a fixture that guarantees positional consistency to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a fixture that ensures consistent positional accuracy. It aims to improve the problems of traditional fixtures, such as limited adaptability of customized special fixtures, time-consuming changeover and easy positioning deviation, and complex structure, high operation threshold and large positional deviation due to lack of scale in general adjustable fixtures.
[0005] This utility model is implemented as follows: A fixture that ensures consistent positional accuracy includes a base. The upper surface of the base has several annularly distributed grooves. A load-bearing slider is slidably connected to each groove. One end of each load-bearing slider is rotatably connected to an adjusting screw. Each adjusting screw is threaded into a connecting screw hole on the inner wall of the corresponding groove and extends to the outside of the base. The top surface of each load-bearing slider has a mounting hole, and a rotating shaft is rotatably mounted in each mounting hole. A multi-faceted clamping block is fixedly connected to the top of the rotating shaft, and a rotating scale is fixedly fitted to the bottom of the rotating shaft. The bottom surface of the load-bearing slider has a limiting structure that cooperates with the rotating scale. The grooves have displacement scale markings.
[0006] In a preferred embodiment of this utility model, a mounting screw hole is provided at the center of the upper surface of the base, and a positioning pin is detachably connected to the mounting screw hole to drive one end.
[0007] In a preferred embodiment of this utility model, the bottom surface of the base is provided with a plurality of legs evenly distributed in a ring.
[0008] In a preferred embodiment of this utility model, the limiting structure includes limiting screw holes formed at both ends of the bottom surface of the bearing slider, each limiting screw hole is threaded with a limiting bolt, one side surface of the end of each limiting bolt abuts against one side surface of the rotating dial, and the other side surface of the rotating dial contacts the bottom surface of the bearing slider.
[0009] In a preferred embodiment of this utility model, each of the limiting bolt ends is provided with an anti-slip part on the surface facing the rotating dial.
[0010] In a preferred embodiment of this utility model, each of the slide grooves is provided with a stepped recessed groove at the opening on the top surface of the base. The displacement scale markings are provided on the inner wall at the bottom of the recessed groove, and there are two sets of them, located on both sides of the slide groove opening.
[0011] In a preferred embodiment of this utility model, the top and bottom surfaces of the bearing slider are provided with corresponding displacement scale markings and rotation scale indicator markings. The top surface of the bearing slider is provided with four indicator markings located on both sides of the top surface of the bearing slider. The bottom surface of the bearing slider is symmetrically provided with two indicator markings at both ends.
[0012] In a preferred embodiment of this utility model, the rotating dial includes a circular plate and two annular plates arranged coaxially. The circular plate is sleeved on the rotating shaft, and the three form two annular grooves. The annular groove on the inner side is used to accommodate the indicator mark, and the annular groove on the outer side is used to accommodate the limit bolt passing through. An angle scale mark is provided around the bottom surface of the circular plate. The circular plate and the two annular plates are fixedly connected by two connecting brackets.
[0013] In a preferred embodiment of this utility model, the multi-faceted clamping block includes a right-angled clamping surface formed by two planes, and an arc-shaped clamping surface is formed between the two ends of the right-angled clamping surface. Anti-slip protective pads are provided on both the right-angled clamping surface and the arc-shaped clamping surface.
[0014] The beneficial effects of this utility model are as follows: The fixture obtained by the above design can ensure the consistency of position. When in use, the multi-faceted clamping blocks can be adapted to workpieces of various shapes, eliminating the need to frequently change the entire fixture set, reducing the time spent on changeovers, and avoiding positioning deviations introduced by reference switching. At the same time, the structure is simple, does not rely on complex hydraulic or electric adjustment components, lowers the operating threshold, and has intuitive scale markings, reducing the reliance on operator experience, and can stably control the positional deviation of batch workpieces. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 This is a schematic perspective view of the overall structure provided by the embodiment of this utility model; Figure 2 A schematic perspective view of the overall structure of the base provided for an embodiment of this utility model; Figure 3 A schematic perspective view of the overall structure of the load-bearing slider provided for an embodiment of this utility model; Figure 4 A schematic perspective view of the overall cross-sectional separation structure of the load-bearing slider provided for an embodiment of this utility model; Figure 5 A perspective view illustrating the overall structure of the rotating dial provided for an embodiment of this utility model; Figure 6 A schematic perspective view of the overall structure of the multi-faceted clamping block provided for an embodiment of this utility model; Figure 7 A perspective view of the overall structure of the limiting bolt provided for an embodiment of this utility model.
[0017] In the diagram: 1-Base; 2-Bearing slider; 3-Multi-faceted clamping block; 101-Slide groove; 102-Connecting screw hole; 103-Displacement scale mark; 104-Mounting screw hole; 105-Positioning pin; 106-Support leg; 201-Adjusting screw; 202-Mounting through hole; 203-Rotating shaft; 204-Rotating dial; 205-Limit screw hole; 206-Limit bolt; 207-Anti-slip part; 208-Indicator mark; 209-Angle scale mark; 210-Annular groove; 211-Connecting frame; 301-Right-angle clamping surface; 302-Arc-shaped clamping surface. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, 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, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0019] Please see Figures 1 to 7This utility model provides a technical solution: a fixture that ensures consistent positional accuracy, including a base 1. The upper surface of the base 1 has several annularly distributed sliding grooves 101. Each sliding groove 101 is slidably connected to a load-bearing slider 2. One end of each load-bearing slider 2 is rotatably connected to an adjusting screw 201. Each adjusting screw 201 is threaded into a connecting screw hole 102 on the inner wall of one end of the corresponding sliding groove 101 and extends to the outside of the base 1. The top surface of each load-bearing slider 2 has a mounting hole 202. A rotating shaft 203 is rotatably mounted in each mounting hole 202. A multi-faceted clamping block 3 is fixedly connected to the top of the rotating shaft 203. A rotating scale 204 is fixedly sleeved on the bottom end of the rotating shaft 203. The bottom surface of the load-bearing slider 2 has a limiting structure that cooperates with the rotating scale 204. The sliding groove 101 has a displacement scale mark 103.
[0020] Please see Figure 2 A mounting screw hole 104 is provided at the center of the upper surface of the base 1, and a positioning pin 105 is detachably connected to the mounting screw hole 104 to drive one end.
[0021] The upper surface of the base 1 has an internally threaded mounting screw hole 104 machined at the center, and is equipped with a multi-specification positioning pin 105. The bottom end of the positioning pin 105 is machined with an external thread that matches the mounting screw hole 104, which can be flexibly replaced according to the hole diameter of the workpiece with holes to achieve precise centering of the hole position.
[0022] Furthermore, the bottom surface of the base 1 is provided with several feet 106 that are evenly distributed in a ring.
[0023] The bottom of the support leg 106 is embedded with a rubber shock-absorbing pad, and the main body of the support leg 106 has a threaded adjustment structure, which can finely adjust the height within a range, which can both compensate for the parallelism error between the base and the machine tool worktable and absorb processing vibration.
[0024] Please see Figures 3 to 7 The limiting structure includes limiting screw holes 205 opened at both ends of the bottom surface of the bearing slider 2. Each limiting screw hole 205 is threaded with a limiting bolt 206. One side surface of the end of each limiting bolt 206 abuts against one side surface of the rotating dial 204, and the other side surface of the rotating dial 204 contacts the bottom surface of the bearing slider 2.
[0025] The bottom surface of the bearing slider 2 has limit screw holes 205 at both ends. Each limit screw hole 205 is threaded with a knurled head hand-tightening limit bolt 206, which can be manually and quickly locked or loosened by the rotating dial 204 without tools. When the bolt end contacts the rotating dial 204, it provides stable limit and avoids the angle displacement of the clamping block 3 caused by processing vibration.
[0026] Furthermore, each limit bolt 206 has an anti-slip part 207 provided on the surface of the end facing the rotating dial 204.
[0027] Each limit bolt 206 has an annular serrated structure on the side of its end facing the rotating dial 204, or has a corundum anti-slip pad attached, which increases the static friction coefficient between the bolt and the dial and enhances the anti-rotation ability after tightening.
[0028] Furthermore, each slide 101 is provided with a stepped recessed groove at the opening on the top surface of the base 1, and two sets of displacement scale marks 103 are provided on the inner wall at the bottom of the recessed groove, respectively located on both sides of the opening of the slide 101.
[0029] Each slide groove 101 has a stepped recessed groove at the opening on the top surface of the base 1. The displacement scale mark 103 is set on the inner wall of the bottom of the recessed groove using laser etching technology. There are two sets of these marks, located on both sides of the opening of the slide groove 101. This protects the scale from wear and makes it easy to read the scale from any side of the base 1.
[0030] Furthermore, the top and bottom surfaces of the bearing slider 2 are provided with corresponding displacement scale markings 103 and indicator markings 208 for rotating dial 204. The top surface of the bearing slider 2 is provided with four indicator markings 208 located on both sides of the top surface of the bearing slider 2. The bottom surface of the bearing slider 2 is symmetrically provided with two indicator markings 208 at both ends.
[0031] The top surface of the bearing slider 2 is machined with 4 V-shaped engravings, which are respectively aligned with the displacement scales on both sides of the slide groove 101; the bottom surface of the bearing slider 2 is symmetrically machined with 2 V-shaped engravings at both ends, which are aligned with the angle scales of the rotating dial 204 to ensure the consistency of position and angle adjustment during batch clamping.
[0032] Furthermore, the rotating dial 204 includes a circular plate and two annular plates arranged coaxially. The circular plate is sleeved on the rotating shaft 203, and the three form two annular grooves 210. The annular groove 210 located on the inner side is used to accommodate the indicator mark 208, and the annular groove 210 located on the outer side is used to accommodate the limit bolt 206 passing through. Angle scale marks 209 are provided around the bottom surface of the circular plate. The circular plate and the two annular plates are fixedly connected by two connecting brackets 211.
[0033] The rotating dial 204 consists of a coaxially distributed circular plate and two annular plates, forming two annular grooves 210. The bottom surface of the circular plate is laser-etched with angle scale markings 209 with a minimum unit of 1°. The circular plate and the two annular plates are fixedly connected by two M-shaped metal connecting brackets 211, providing clearance space for the indicator markings 208 and the limit bolts 206 to ensure angle alignment accuracy.
[0034] Furthermore, the multi-faceted clamping block 3 includes a right-angled clamping surface 301 formed by two planes, and an arc-shaped clamping surface 302 formed between the two ends of the right-angled clamping surface 301. Anti-slip protective pads are provided on both the right-angled clamping surface 301 and the arc-shaped clamping surface 302.
[0035] The multi-faceted clamping block 3 is made of aluminum alloy in one piece. It includes a right-angle clamping surface 301 formed by two planes with an included angle of 90°, and an arc-shaped clamping surface 302 formed between the ends of the two planes. Both the right-angle clamping surface 301 and the arc-shaped clamping surface 302 are coated with polyurethane anti-slip protective pads with fine anti-slip textures. It can be used to clamp workpieces of various shapes such as round and straight edges, while avoiding indentations or scratches on the workpiece surface.
[0036] Working principle: When a workpiece is placed on the base 1, if it is a workpiece with holes, the hole position can be centered by the detachable positioning pin 105 at the center of the base, directly restricting the X and Y directions of movement and rotation. Then, rotating the adjusting screw 201 drives the bearing slider 2 to slide along the slide groove 101 of the base 1. With the cooperation of the indicator mark 208 on the top of the bearing slider 2 and the displacement scale mark 103 of the slide groove 101, the position of the multi-faceted clamping block 3 is precisely adjusted to ensure that the clamping blocks of a batch of workpieces are in the same position. Then, rotating the multi-faceted clamping block 3 causes it to rotate around the rotating shaft 203 synchronously, driving the rotating scale 204 to rotate. The bottom indicator 208 of the bearing slider 2 is aligned with the angle scale indicator 209 of the rotating dial 204. The angle of the clamping block is adjusted. The right-angle clamping surface 301 is suitable for square and straight-edged workpieces, and the arc-shaped clamping surface 302 is suitable for round and arc-shaped workpieces to improve the fit with the workpiece shape. After the angle is adjusted, the limiting bolt 206 at the bottom of the bearing slider 2 is tightened. The anti-slip part 207 at the end of the bolt is tightly abutted against the rotating dial 204 to prevent the angle of the clamping block from shifting due to processing vibration. At the same time, the support foot 106 at the bottom of the base absorbs processing vibration through rubber shock-absorbing pads and can be adjusted in height to compensate for parallelism errors. The entire process uses the dual scale of displacement and angle to accurately mark the position and angle parameters of batch workpieces, so as to quickly reproduce the position and angle parameters of the clamping. Combined with the multi-shaped adaptation of the multi-faceted clamping block 3 and the centering of the hole position of the positioning pin 105, a high degree of consistency in the position of workpieces of different shapes in the fixture is finally achieved.
[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A fixture that ensures consistent positional accuracy, characterized in that, The device includes a base with several annularly distributed grooves on its upper surface. A load-bearing slider is slidably connected in each groove. An adjusting screw is rotatably connected to one end of each load-bearing slider. Each adjusting screw is threaded into a connecting screw hole on the inner wall of the corresponding groove and extends to the outside of the base. A mounting hole is provided on the top surface of each load-bearing slider, and a rotating shaft is rotatably installed in each mounting hole. A multi-faceted clamp is fixedly connected to the top of the rotating shaft, and a rotating scale is fixedly fitted on the bottom of the rotating shaft. A limiting structure that cooperates with the rotating scale is provided on the bottom surface of the load-bearing slider, and displacement scale markings are provided on the groove.
2. The fixture for ensuring positional consistency as described in claim 1, characterized in that: A mounting screw hole is provided at the center of the upper surface of the base, and a positioning pin is detachably connected to the mounting screw hole to drive one end.
3. The fixture for ensuring positional consistency as described in claim 1, characterized in that: The bottom surface of the base is provided with several legs that are evenly distributed in a ring.
4. The fixture for ensuring positional consistency as described in claim 1, characterized in that: The limiting structure includes limiting screw holes at both ends of the bottom surface of the bearing slider. Each limiting screw hole is threaded with a limiting bolt. One side of the end of each limiting bolt abuts against one side of the rotating dial, and the other side of the rotating dial contacts the bottom surface of the bearing slider.
5. The fixture for ensuring positional consistency as described in claim 4, characterized in that: Each of the limiting bolt ends has an anti-slip part provided on the surface facing the rotating dial.
6. The fixture for ensuring positional consistency as described in claim 1, characterized in that: Each of the slides is provided with a stepped recessed groove at the opening on the top surface of the base. The displacement scale markings are set on the inner wall of the bottom of the recessed groove, and there are two sets of them, located on both sides of the slide opening.
7. The fixture for ensuring positional consistency as described in claim 1, characterized in that: The top and bottom surfaces of the bearing slider are provided with corresponding displacement scale marks and rotation scale indicator marks. The top surface of the bearing slider is provided with four indicator marks located on both sides of the top surface of the bearing slider. The bottom surface of the bearing slider is symmetrically provided with two indicator marks at both ends.
8. The fixture for ensuring positional consistency as described in claim 7, characterized in that: The rotating dial includes a circular plate and two annular plates arranged coaxially. The circular plate is sleeved on the rotating shaft, and the three form two annular grooves. The annular groove on the inner side is used to accommodate the indicator mark, and the annular groove on the outer side is used to accommodate the limit bolt passing through. An angle scale mark is provided around the bottom surface of the circular plate. The circular plate and the two annular plates are fixedly connected by two connecting brackets.
9. The fixture for ensuring positional consistency as described in claim 1, characterized in that: The multi-faceted clamping block includes a right-angled clamping surface formed by two planes, and an arc-shaped clamping surface is formed between the two ends of the right-angled clamping surface. Anti-slip protective pads are provided on both the right-angled clamping surface and the arc-shaped clamping surface.