Balance positioning device

Abstract

The utility model relates to the technical field of workpiece positioning, in particular to a balance positioning device which comprises a base, a positioning column is installed on the base, and the base is communicated with the interior of the positioning column and provided with a pre-tightening mechanism used for positioning workpieces with different inner diameters. The pre-tightening mechanism comprises an adjusting assembly arranged in the base and the positioning column, a plurality of balls distributed at equal intervals are arranged above the adjusting assembly and connected with the adjusting assembly in a rolling mode, the balls are rotationally connected to the bottom of a pre-tightening block, the pre-tightening block is arranged in a movable hole formed in the outer wall of the positioning column in a sliding mode, and a spring is connected to the inner side of the pre-tightening block. The spring is fixedly connected in the positioning column through a fixing block; according to the balance positioning device, the adjusting assembly is used for controlling the jacking column to ascend and descend, the jacking column extrudes the pre-tightening block through the ball to move outwards, the pre-tightening block is adjusted to be attached to the inner hole of the workpiece, the balance positioning device can be used for positioning workpieces with different inner diameter sizes, the positioning effect is good, adaptability and flexibility are high, and adjustment can be conducted according to actual use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece positioning, and specifically relates to a balance positioning device. Background Art

[0002] When processing a cylindrical thin-walled part, a positioning device needs to be used to fix it first to ensure the stability of subsequent processing operations. However, the existing positioning device fixes the workpiece by inserting it onto a positioning post, and uses the clearance fit between the outer diameter of the positioning post and the inner hole of the workpiece to achieve X and Y direction positioning and fixing of the workpiece. Then, a pin is horizontally inserted into the side hole of the workpiece to perform Z direction positioning and fixing. However, due to the constant outer diameter size of the positioning post, it can only fix workpieces of a single size, with poor adaptability and flexibility, and there are still certain drawbacks in actual use. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a balance positioning device, which solves the technical problem that the existing positioning device can only fix workpieces of a single size.

[0004] To solve the above technical problems, the utility model provides the following technical solutions: A balance positioning device includes a base, a positioning post is installed on the base, and the interior of the base and the positioning post is communicated and provided with a pre-tightening mechanism for positioning workpieces with different inner diameters;

[0005] The pre-tightening mechanism includes an adjusting component arranged inside the base and the positioning post. Above the adjusting component, a plurality of equally spaced balls are arranged and are in rolling connection with the balls. The balls are rotatably connected to the bottom of a pre-tightening block. The pre-tightening block is slidably arranged in a movable hole opened on the outer wall of the positioning post. The inner side of the pre-tightening block is connected with a spring, and the spring is fixedly connected to the positioning post through a fixing block.

[0006] Preferably, a plurality of jacks are arranged at the bottom of the base. Bolts are inserted into the jacks. Washers are sleeved on the bolts. The top ends of the bolts are threadedly connected to threaded holes opened at the bottom of the positioning post.

[0007] Preferably, the adjusting component includes two bearings embedded inside the base. A long handle screw is rotatably connected inside the two bearings. One end of the long handle screw extends outside the base, and the other end is threadedly connected to a screw sleeve. The screw sleeve is embedded inside a slider. The slider is slidably arranged in a sliding cavity opened inside the base. A top post is slidably connected to the slider. The top post is movably connected to the interior of the positioning post. The top end of the top post is frustum-shaped and is in rolling contact with a plurality of balls.

[0008] Preferably, an outer inclined surface is opened on the slider, and an inner inclined surface is opened at the bottom of the top post. The outer inclined surface and the inner inclined surface are in sliding contact.

[0009] Preferably, a positioning pin is fixedly provided on one side of the positioning post through a connecting rope. The positioning pin passes through the side hole of the workpiece and is inserted into the jack on the outer wall of the positioning post.

[0010] Preferably, a first magnetic block is fixedly provided at one end of the positioning pin, and the first magnetic block is magnetically connected to a second magnetic block embedded in the jack.

[0011] By means of the above technical solution, the present utility model provides a balance positioning device, which at least has the following beneficial effects:

[0012] 1. For this balance positioning device, by setting a pre-tightening mechanism, the lifting movement of the top post is controlled by an adjusting component. The top post squeezes the pre-tightening block to move outward through a ball, and the pre-tightening block is adjusted to fit the inner hole of the workpiece, which can be used for positioning workpieces with different inner diameter sizes. The positioning effect is good, and the adaptability and flexibility are relatively high, and it can be adjusted according to actual use requirements.

[0013] 2. For this balance positioning device, by setting a positioning pin, a first magnetic block and a second magnetic block, after the workpiece is pre-tightened, the positioning pin is horizontally inserted into the side hole of the workpiece. In this way, when other hole positions are processed subsequently, a fixed angular relationship can be formed with the side hole, which has a hole position positioning effect, and the magnetic fixation between the first magnetic block and the second magnetic block can prevent the positioning pin from disengaging during the processing, further improving the stability of the workpiece during the processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the whole of the present utility model;

[0016] Figure 2 It is a structural schematic diagram of the base and the positioning post of the present utility model in a sectional view along the X direction;

[0017] Figure 3 It is a structural schematic diagram of the base and the positioning post of the present utility model in a sectional view along the Y direction;

[0018] Figure 4 It is a structural schematic diagram of the slider and the top post of the present utility model;

[0019] Figure 5 For the present utility model Figure 2 The enlarged structural schematic at A in.

[0020] Reference numerals:

[0021] 1. Base; 2. Bolt; 3. Positioning post; 4. Gasket; 5. Pre-tightening mechanism; 51. Adjusting component; 511. Long-shank screw; 512. Bearing; 513. Screw sleeve; 514. Slide block; 5141. Outer inclined surface; 515. Thrust post; 5151. Inner inclined surface; 52. Ball; 53. Pre-tightening block; 54. Spring; 55. Fixed block; 6. Connecting rope; 7. Positioning pin; 8. Magnet one; 9. Magnet two. Detailed implementation mode

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] The workpiece processed by this positioning device is a cylindrical thin-walled part. Several holes and threaded holes need to be processed on its upper end surface, and there is an angular relationship between each hole and the side hole processed at the outer diameter of the part. The existing processing method is to perform processing operations by a machining center, but the machining center has high processing costs, resulting in an increase in the production cost of a single workpiece. By using the positioning device, it can be converted to a general processing device for processing, which reduces the processing cost of the part while ensuring the quality of the part.

[0024] Embodiment 1:

[0025] Based on the technical defect that the prior art has poor adaptability and flexibility due to only being able to fix workpieces of a single size, please refer to Figures 1 - 5 , a balance positioning device provided by the present invention uses the adjusting component 51 to control the lifting movement of the thrust post 515. The thrust post 515 squeezes the pre-tightening block 53 to move outward through the ball 52, which can be used to position workpieces with different inner diameter sizes. The positioning effect is good, and the adaptability and flexibility are relatively high, and it can be adjusted according to actual use requirements. A positioning post 3 is installed on the base 1, and the inside of the base 1 and the positioning post 3 is connected and provided with a pre-tightening mechanism 5 for positioning workpieces with different inner diameters; first, the workpiece is sleeved on the positioning post 3, and then the pre-tightening block 53 is adjusted to fit the inner wall of the workpiece by using the pre-tightening mechanism 5, so as to position workpieces of different sizes.

[0026] To adjust the positioning device according to the inner diameter size of the workpiece, please refer to Figure 2, the pre-tightening mechanism 5 includes an adjusting component 51 disposed inside the base 1 and the positioning column 3. Above the adjusting component 51, a plurality of equally spaced balls 52 are provided and are in rolling connection therewith. The balls 52 are rotatably connected to the bottom of the pre-tightening block 53. The pre-tightening block 53 is slidably disposed in a movable hole formed on the outer wall of the positioning column 3. The inner side of the pre-tightening block 53 is connected with a spring 54. The spring 54 is fixedly connected inside the positioning column 3 through a fixing block 55. By rotating the adjusting component 51 and making the ejector pin 515 move up and down, the ejector pin 515 squeezes the pre-tightening block 53 to move outward through the balls 52, thereby changing the protruding distance of the pre-tightening block 53 to meet the positioning of workpieces with different inner diameters.

[0027] To facilitate the installation of the positioning column 3, a plurality of jacks are provided at the bottom of the base 1. Bolts 2 are inserted into the jacks. Washers 4 are sleeved on the bolts 2. The top ends of the bolts 2 are threadedly connected to threaded holes formed at the bottom of the positioning column 3. When installing the positioning column 3, align the threaded holes at the bottom of the positioning column 3 with the jacks of the base 1, and then pass the bolts 2 through the jacks and screw them into the threaded holes to connect and fix the two.

[0028] To facilitate the adjustment of the protruding distance of the pre-tightening block 53, please refer to Figure 2 , the adjusting component 51 includes two bearings 512 embedded inside the base 1. A long handle screw 511 is rotatably connected inside the two bearings 512. One end of the long handle screw 511 extends outside the base 1, and the other end is threadedly connected to a screw sleeve 513. The screw sleeve 513 is embedded inside a slider 514. The slider 514 is slidably disposed in a sliding cavity formed inside the base 1. An ejector pin 515 is slidably connected to the slider 514. The ejector pin 515 is movably connected inside the positioning column 3. The top end of the ejector pin 515 is frustum-shaped and is in rolling contact with a plurality of balls 52. Rotate the long handle screw 511 and make the slider 514 move through the threaded engagement with the screw sleeve 513. The slider 514 squeezes the ejector pin 515 and forces the ejector pin 515 to move upward. Since the top end of the ejector pin 515 is frustum-shaped, the top end of the ejector pin 515 will gradually push the pre-tightening block 53 outward through the balls 52, so that the pre-tightening block 53 contacts the inner wall of the workpiece to achieve the purpose of positioning workpieces with different inner diameters.

[0029] To ensure that the ejector pin 515 can move upward under the extrusion of the slider 514, an outer inclined surface 5141 is formed on the slider 514, and an inner inclined surface 5151 is formed at the bottom of the ejector pin 515. The outer inclined surface 5141 and the inner inclined surface 5151 are in sliding fit. By using the sliding fit between the outer inclined surface 5141 and the inner inclined surface 5151, an upward thrust can be generated during extrusion to make the ejector pin 515 move upward.

[0030] Embodiment 2:

[0031] After the workpiece is positioned by the positioning post 3, it only has a fixing effect in the X and Y directions and lacks fixing in the Z direction. Therefore, during the machining process, the workpiece still has a tendency to move up and down, resulting in unstable machining. To solve this problem, please refer to Figure 2 and Figure 5 , on the basis of the first embodiment, a positioning pin 7 is fixedly provided on one side of the positioning post 3 through a connecting rope 6. The positioning pin 7 passes through the side hole of the workpiece and is inserted into the jack on the outer wall of the positioning post 3. The positioning post 3 is inserted from the side hole of the workpiece to limit the movement of the workpiece in the Z direction, thereby ensuring that the workpiece is more stable during the machining process.

[0032] During the machining process of the workpiece, certain vibrations will occur, which can easily cause the positioning pin 7 to disengage from the jack. To solve this problem, a first magnetic block 8 is fixedly provided at one end of the positioning pin 7, and the first magnetic block 8 is magnetically connected to a second magnetic block 9 embedded in the jack. The magnetic attraction between the first magnetic block 8 and the second magnetic block 9 can be used to prevent the positioning pin 7 from disengaging during the machining process, further improving the stability of the workpiece during the machining process.

[0033] It can be seen from the above embodiments that first, the workpiece is sleeved on the positioning post 3, the long handle screw 511 is rotated, and the slider 514 moves through the threaded engagement with the screw sleeve 513. The slider 514 presses the ejector pin 515 and forces the ejector pin 515 to move upward. Since the top end of the ejector pin 515 is frustum-shaped, the top end of the ejector pin 515 will gradually push the pre-tightening block 53 outward through the ball 52, so that the pre-tightening block 53 contacts the inner wall of the workpiece, and the pre-tightening block 53 is adjusted to a position corresponding to the inner diameter of the workpiece. At this time, the positioning post 3 can limit the movement of the workpiece in the X and Y directions. Then, the positioning pin 7 is passed through the side hole of the workpiece and inserted into the jack on the outer wall of the positioning post 3. The positioning post 3 is inserted from the side hole of the workpiece to limit the movement of the workpiece in the Z direction, so that the workpiece can be fixed for subsequent machining.

[0034] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A balancing positioning device, comprising a base (1), characterized in that: A positioning column (3) is installed on the base (1); the base (1) and the positioning column (3) are internally connected and are provided with a pre-tightening mechanism (5) for positioning workpieces with different inner diameters; The pre-tightening mechanism (5) comprises an adjusting component (51) arranged inside the base (1) and the positioning column (3); a plurality of equally spaced balls (52) are arranged above the adjusting component (51) and are rollingly connected thereto; the balls (52) are rotatably connected to the bottom of a pre-tightening block (53); the pre-tightening block (53) is slidably arranged in a movable hole opened on the outer wall of the positioning column (3); a spring (54) is connected to the inner side of the pre-tightening block (53); and the spring (54) is fixedly connected to the positioning column (3) via a fixing block (55).

2. The balancing positioning device according to claim 1, characterized in that: The bottom of the base (1) is provided with a plurality of insertion holes, in which bolts (2) are inserted, gaskets (4) are sleeved on the bolts (2), and the top ends of the bolts (2) are threadedly connected to threaded holes provided at the bottom of the positioning columns (3).

3. The balancing and positioning device according to claim 1, characterized in that: The adjustment component (51) comprises two bearings (512) embedded in the base (1), a long-handled screw (511) rotatably connected in the two bearings (512), one end of the long-handled screw (511) extending to the outside of the base (1), and the other end being threadedly connected in a screw sleeve (513), the screw sleeve (513) being embedded in a slider (514), the slider (514) being slidably disposed in a sliding cavity opened in the base (1), a top column (515) being slidably connected to the slider (514), the top column (515) being movably connected to the inside of the positioning column (3), the top end of the top column (515) being in a frustum shape and rollingly fitted with a plurality of balls (52).

4. The balancing and positioning device according to claim 3, characterized in that: The sliding block (514) is provided with an outer inclined surface (5141), and the bottom of the top column (515) is provided with an inner inclined surface (5151), and the outer inclined surface (5141) and the inner inclined surface (5151) are slidably fitted.

5. The balancing and positioning device according to claim 1, characterized in that: A positioning pin (7) is fixedly arranged on one side of the positioning column (3) via a connecting rope (6); the positioning pin (7) passes through a side hole of the workpiece and is inserted into a socket on the outer wall of the positioning column (3).

6. The balancing and positioning device according to claim 5, characterized in that: A magnetic block 1 (8) is fixedly arranged at one end of the positioning pin (7), and the magnetic block 1 (8) is magnetically connected to a magnetic block 2 (9) embedded in the insertion hole.

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