Positioning device for precision part machining

Abstract

The utility model discloses a positioning device for precision part machining, and belongs to the technical field of part machining and positioning. A positioning device for precision part machining comprises a workbench, connecting rods are arranged on the two sides of the workbench in a penetrating mode, the connecting rods are in sliding fit with the workbench, the upper ends of the connecting rods are movably connected with clamping blocks, and limiting mechanisms are arranged at the joints of the connecting rods and the clamping blocks; a support is arranged on the bottom face of the workbench, a connecting plate is connected to the support in a rotating mode, and the two ends of the connecting plate are connected with two connecting rods in a rotating mode respectively, the connecting plate is connected with the support in a rotating mode, the connecting rods are connected with the connecting plate in a rotating mode, and the lever principle is utilized to enable a nut on one side to rotate to drive the connecting rods to move upwards. At the moment, the connecting plate rotates relative to the connecting position of the connecting plate and the support, the connecting rod on the other side can move downwards, and therefore the clamping blocks are driven to move downwards, the force of the clamping blocks on the two sides for pressing the surface of the precision part is equal, and machining of the precision part is more accurate and higher in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of parts processing and positioning, and more specifically, to a positioning device for precision parts processing. Background Art

[0002] There are many types of precision parts. The most common ones are regular parts such as shaft parts, pipe parts and gear parts. Most of them are irregular parts. No matter what kind of precision parts are processed, positioning devices are required. Due to the special shape of irregular parts, the design of positioning devices cannot be unified. In addition, the existing positioning devices usually operate separately when clamping the two sides of the parts, which easily causes uneven force on both sides of the workpiece.

[0003] For example, patent CN213614322U discloses a precision positioning fixture for precision parts processing. By setting a clamping device, two No. 1 threaded rods are rotated left and right respectively, and the action of the No. 1 telescopic spring is used to drive the clamping plate to move left and right. After adjusting the appropriate position, the left and right parts of the part are placed in the two clamping plates and on the soft pads respectively, and the No. 2 threaded rod is threaded downward so that the lower end of the soft pad fits with the upper end of the part to achieve the clamping and fixing of the part. However, this fixing method is more complicated, and clamping both sides separately will easily cause uneven force on both sides of the workpiece, thus affecting the processing effect. In view of this, we propose a positioning device for precision parts processing. Utility Model Content

[0004] The purpose of the utility model is to provide a positioning device for precision parts processing to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A positioning device for precision parts processing, comprising a workbench, connecting rods are arranged on both sides of the workbench, the connecting rods are slidably matched with the workbench, a clamping block is movably connected to the upper end of the connecting rod, and a limit mechanism is arranged at the connection between the connecting rod and the clamping block;

[0007] A bracket is arranged on the bottom surface of the workbench, a connecting plate is rotatably connected to the bracket, and two ends of the connecting plate are rotatably connected to two connecting rods respectively.

[0008] Preferably, the limiting mechanism comprises a limiting nut, a threaded section is provided on the surface of the connecting rod, the limiting nut is threadably matched with the threaded section, and the limiting nut is located on the top surface of the clamping block.

[0009] Preferably, a limit strip is arranged inside the clamping block, and the outer end of the limit strip is arranged to be inclined upward.

[0010] Preferably, a groove is provided at the end of the limiting strip, and the groove has a V-shaped structure.

[0011] Preferably, a limiting ring is sleeved on the connecting rod below the clamping block, a spring is arranged on the bottom surface of the limiting ring, and the end of the spring is connected to the top surface of the workbench.

[0012] Preferably, a slide groove A is provided on the clamping block, and the connecting rod passes through the slide groove A, and the connecting rod and the slide groove A are clearance-matched.

[0013] Preferably, the outer end of the clamping block is connected to a telescopic rod, and threaded rods are provided on both sides of the lower end of the bracket, the threads on the two threaded rods rotate in opposite directions, and a sleeve is threadedly connected to the threaded rod, and the sleeve is connected to the telescopic rod;

[0014] Slide grooves B are provided on both sides of the top surface of the workbench, and the telescopic rod is slidably matched with the slide grooves B.

[0015] Preferably, a connecting ball is provided at the lower end of the connecting rod, and a mounting groove is provided at the end of the connecting plate, and the connecting ball is rotatably connected in the mounting groove.

[0016] Preferably, a support frame is provided on the bottom surface of the workbench, the end of the threaded rod is rotatably connected to the support frame, one side of the support frame is rotatably connected to a hand wheel, and the hand wheel is connected to the threaded rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) The utility model has a connecting plate that is rotatably connected to the bracket, and a connecting rod that is rotatably connected to the connecting plate. By utilizing the principle of a lever, a nut on one side is rotated to drive the connecting rod to move upward. At this time, the connecting plate rotates relative to the connection between it and the bracket, and the connecting rod on the other side moves downward, thereby driving the clamping block to move downward, so that the forces of the clamping blocks on both sides pressing the surface of the precision parts are equal, thereby making the processing of the precision parts more accurate and more efficient.

[0019] (2) The utility model can adjust the distance between the two clamping blocks by means of the cooperation between the threaded rod, the sleeve and the telescopic rod, so as to facilitate the fixation of parts of different sizes; by providing the limit strip and the V-shaped groove, it is convenient to fix the columnar precision parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the positioning device for precision parts processing of the utility model;

[0021] Figure 2 It is a schematic side view of the overall structure of the positioning device for precision parts processing of the utility model;

[0022] Figure 3 This is a schematic diagram of the installation of the connecting rod and the clamping block of the utility model;

[0023] Figure 4 This is a schematic diagram of the disassembly of the connecting rod and the clamping block of the utility model.

[0024] Explanation of the numbers in the figure: 1. Workbench; 101. Slide B; 102. Support frame; 2. Connecting rod; 201. Connecting ball; 3. Clamping block; 301. Limiting strip; 302. Groove; 303. Slide A; 4. Connecting plate; 401. Mounting slot; 5. Bracket; 6. Limiting nut; 7. Limiting ring; 8. Spring; 9. Telescopic rod; 10. Threaded rod; 11. Sleeve; 12. Handwheel. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Embodiment 1:

[0027] See also Figure 1-4 A positioning device for precision parts processing includes a workbench 1, connecting rods 2 are arranged on both sides of the workbench 1, the connecting rods 2 are slidably matched with the workbench 1, and a clamping block 3 is movably connected to the upper end of the connecting rod 2 for clamping the precision parts to be processed. A limiting mechanism is arranged at the connection between the connecting rod 2 and the clamping block 3 for limiting the relative position of the clamping block 3 and the connecting rod 2;

[0028] A bracket 5 is provided on the bottom surface of the workbench 1, and a connecting plate 4 is rotatably connected to the bracket 5. The two ends of the connecting plate 4 are rotatably connected to two connecting rods 2. The parts are placed on the top surface of the workbench 1, below the clamping block 3, and then the clamping block 3 on one side is moved downward, so that the connecting rod 2 on the same side moves upward, and the connecting plate 4 rotates relative to the connection between it and the bracket 5. The connecting rod 2 on the other side will drive the clamping block 3 to move downward and press the parts, so that the forces of the two clamping blocks 3 pressing on the surface of the precision parts are equal, so that the processing efficiency of the precision parts is higher.

[0029] In the present application, the limiting mechanism includes a limiting nut 6, a threaded section is provided on the surface of the connecting rod 2, the limiting nut 6 is threadedly matched with the threaded section, and the limiting nut 6 is located on the top surface of the clamping block 3. By rotating the limiting nut 6 on one side, the clamping block 3 on one side moves downward, and the connecting rod 2 on the same side moves upward, so that the two clamping blocks 3 press the two sides of the part.

[0030] In the present application, the connecting rod 2 is provided with a limit ring 7 under the clamping block 3, and a spring 8 is provided on the bottom surface of the limit ring 7, and the end of the spring 8 is connected to the top surface of the workbench 1. The elastic force of the spring 8 provides a supporting force to the clamping block 3, and there is a gap between the connecting rod 2 and the inner wall of the limit ring 7.

[0031] The clamping block 3 is provided with a slide groove A303, through which the connecting rod 2 passes, and the connecting rod 2 is in clearance with the slide groove A303. The diameter of the limiting ring 7 is larger than the width of the slide groove A303, so that the limiting ring 7 can support the clamping block 3.

[0032] Working principle: When the precision parts are pressed, the limit nut 6 on one side is rotated to make the clamping block 3 on one side move downward, and the connecting rod 2 on the same side moves upward, while the limit nut 6 on the other side remains stationary on the connecting rod 2. Therefore, when the connecting rod 2 on one side moves upward, the connecting plate 4 rotates relative to the connection between it and the bracket 5, and the connecting rod 2 on the other side moves downward, thereby driving the clamping block 3 to move downward, so that the clamping block 3 presses the parts, so that the force of the two clamping blocks 3 pressing on the surface of the precision parts is equal, making the processing efficiency of the precision parts higher.

[0033] Embodiment 2:

[0034] See also Figure 1-2 , combined with the basis of embodiment 1, the difference is that: the outer end of the clamping block 3 is connected to the telescopic rod 9, and threaded rods 10 are arranged on both sides of the lower end of the bracket 5. The threads on the two threaded rods 10 rotate in opposite directions. The threaded rods 10 are threadedly connected to the sleeves 11, and the sleeves 11 are connected to the telescopic rod 9; rotating the threaded rods 10 can make the two sleeves 11 move relative to each other, thereby driving the clamping blocks 3 to move relative to each other, adjusting the distance between the clamping blocks 3, and facilitating the clamping of different parts.

[0035] Slide grooves B101 are provided on both sides of the top surface of the workbench 1, and the telescopic rod 9 slides with the slide grooves B101. When the two clamping blocks 3 move relative to each other, the telescopic rod 9 moves linearly along the slide grooves B101, and the slide groove A303 moves horizontally relative to the connecting rod 2. A through hole is provided on the top surface of the workbench 1 on one side of the slide groove B101, and the connecting rod 2 passes through the through hole.

[0036] In the present application, a connecting ball 201 is provided at the lower end of the connecting rod 2, and a mounting groove 401 is opened at the end of the connecting plate 4. The connecting ball 201 is rotatably connected in the mounting groove 401. By setting the connecting ball 201 in the mounting groove 401, the reverse rotation of the connecting rod 2 is restricted, which facilitates the rotation of the connecting rod 2 relative to the connecting plate 4 when moving vertically.

[0037] In the present application, a support frame 102 is provided on the bottom surface of the workbench 1, and the end of the threaded rod 10 is rotatably connected to the support frame 102. A handwheel 12 is rotatably connected to one side of the support frame 102. The handwheel 12 is connected to the threaded rod 10, and the threaded rod 10 is driven to rotate by the handwheel 12.

[0038] Working principle: When pressing precision parts of different sizes, the threaded rod 10 is driven to rotate by the hand wheel 12. The threads on the two threaded rods 10 rotate in opposite directions, so rotating the threaded rod 10 can make the two sleeves 11 and the telescopic rod 9 move relative to each other, thereby using the telescopic rod 9 to drive the two clamping blocks 3 to move relative to each other, and adjust the distance between the clamping blocks 3. After the distance is adjusted, the precision parts are pressed in the same pressing method as in Example 1.

[0039] Embodiment 3:

[0040] See also Figure 3-4 , combined with the basis of Examples 1 and 2, the difference is that: a limit strip 301 is set on the inner side of the clamping block 3, and the outer end of the limit strip 301 is set upwardly inclined to facilitate clamping of horizontally placed columnar parts. The limit strip 301 and the clamping block 3 are attached to the side of the columnar part. The clamping method is the same as in Example 1. The clamping block 3 on one side is moved down, so that the limit strips 301 and the clamping blocks 3 on both sides can press and fix the columnar part.

[0041] In a possible embodiment, a groove 302 is provided at the end of the limiting strip 301, and the groove 302 is in a V-shaped structure. By setting the groove 302 in the V-shaped structure, it is convenient to fix the vertically placed columnar parts. At this time, it is only necessary to rotate the threaded rod 10 to adjust the horizontal distance between the two clamping blocks 3 in the same way as in Example 2 to clamp the columnar parts, and the vertical position of the clamping block 3 will not move under the action of the spring 8.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A positioning device for precision parts processing, comprising a workbench (1), characterized in that: Connecting rods (2) are provided on both sides of the workbench (1), the connecting rods (2) are slidably matched with the workbench (1), the upper ends of the connecting rods (2) are movably connected with clamping blocks (3), and a limiting mechanism is provided at the connection between the connecting rods (2) and the clamping blocks (3); The bottom surface of the workbench (1) is provided with a bracket (5), and a connecting plate (4) is rotatably connected to the bracket (5), and two ends of the connecting plate (4) are rotatably connected to two connecting rods (2) respectively.

2. A positioning device for precision parts processing according to claim 1, characterized in that: The limiting mechanism comprises a limiting nut (6), a threaded section is provided on the surface of the connecting rod (2), the limiting nut (6) is threadably matched with the threaded section, and the limiting nut (6) is located on the top surface of the clamping block (3).

3. A positioning device for precision parts processing according to claim 1, characterized in that: A limiting strip (301) is arranged on the inner side of the clamping block (3), and the outer end of the limiting strip (301) is arranged to be inclined upward.

4. A positioning device for precision parts processing according to claim 3, characterized in that: A groove (302) is provided at the end of the limiting strip (301), and the groove (302) is in a V-shaped structure.

5. A positioning device for precision parts processing according to claim 1, characterized in that: The connecting rod (2) is located below the clamping block (3) and is sleeved with a limiting ring (7); a spring (8) is provided on the bottom surface of the limiting ring (7); and an end of the spring (8) is connected to the top surface of the workbench (1).

6. A positioning device for precision parts processing according to claim 1, characterized in that: The clamping block (3) is provided with a slide groove A (303), the connecting rod (2) passes through the slide groove A (303), and the connecting rod (2) and the slide groove A (303) are clearance-matched.

7. A positioning device for precision parts processing according to claim 6, characterized in that: The outer end of the clamping block (3) is connected to a telescopic rod (9), and threaded rods (10) are arranged on both sides of the lower end of the bracket (5), the threads on the two threaded rods (10) rotate in opposite directions, and a sleeve (11) is threadedly connected to the threaded rod (10), and the sleeve (11) is connected to the telescopic rod (9); Slide grooves B (101) are provided on both sides of the top surface of the workbench (1), and the telescopic rod (9) is slidably matched with the slide grooves B (101).

8. A positioning device for precision parts processing according to claim 6, characterized in that: A connecting ball (201) is arranged at the lower end of the connecting rod (2), a mounting groove (401) is provided at the end of the connecting plate (4), and the connecting ball (201) is rotatably connected in the mounting groove (401).

9. A positioning device for precision parts processing according to claim 7, characterized in that: A support frame (102) is arranged on the bottom surface of the workbench (1), the end of the threaded rod (10) is rotatably connected to the support frame (102), one side of the support frame (102) is rotatably connected to a hand wheel (12), and the hand wheel (12) is connected to the threaded rod (10).

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