Positioning mechanism for precise thin-walled tube

Abstract

The utility model discloses a precise thin-walled tube positioning mechanism which comprises a base plate, a fixed support installed at one end of the base plate, a movable support arranged at the other end of the base plate and at least two supporting blocks arranged between the fixed support and the movable support at intervals. The movable support is provided with an ejector pin facing the positioning block, the upper surface of the supporting block is provided with a V-shaped supporting groove allowing the hollow pipe fitting to be embedded therein, the end face of the end, facing the ejector pin, of the main body portion of the positioning block is provided with an outward protruding portion, and the conical protruding portion and the ejector pin are coaxially arranged and can be embedded into the hollow pipe fitting. A horizontally-arranged mounting plate is arranged below the ejector pin, and a pneumatic clamping jaw is mounted on the upper surface of the other end of the mounting plate with one end connected with the movable support. According to the centering device, centering calibration of the position of the hollow pipe fitting can be carried out in the horizontal radial direction, and the position precision of the hollow pipe fitting in the final clamping state is improved.

Description

Technical Field

[0001] The utility model relates to a positioning mechanism for a precision thin-wall tube and belongs to the technical field of medical equipment processing. Background Art

[0002] Metal pipes are widely used in industrial products. Similarly, metal catheters are also an important part of medical consumables. Due to the needs of medical applications, catheter-type medical consumables often require various processing such as marking on metal catheters to meet a variety of application scenarios. Since thin-walled pipes have poor rigidity and high dimensional requirements for medical device parts processing, how to achieve the clamping of pipes for subsequent processing has become a technical problem that needs to be solved urgently. Utility Model Content

[0003] The purpose of the utility model is to provide a positioning mechanism for a precision thin-walled tube, which can not only improve the position accuracy and stability of the hollow tube during its horizontal movement, but also calibrate the position of the hollow tube in the horizontal radial direction, thereby improving the position accuracy of the hollow tube in the final clamping state.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a positioning mechanism for a precision thin-walled tube, comprising: a base plate, a fixed bracket installed at one end of the base plate, a movable bracket arranged at the other end of the base plate, and at least two support blocks spaced apart and arranged between the fixed bracket and the movable bracket, wherein the fixed bracket is provided with a positioning block on one side facing the movable bracket, the movable bracket is provided with a ejector arranged toward the positioning block, the upper surface of the support block is provided with a V-shaped supporting groove for embedding a hollow pipe fitting, the main body of the positioning block is provided with an outward protrusion on the end surface facing one end of the ejector, the conical protrusion is coaxially arranged with the ejector and can be embedded in the hollow pipe fitting;

[0005] A horizontally arranged mounting plate is provided below the ejector pin, and a pneumatic clamp is installed on the upper surface of the other end of the mounting plate whose one end is connected to the movable bracket. The two movable blocks of the pneumatic clamp located between the ejector pin and the support block can approach or move away from each other in the horizontal direction, and a clamping block is installed on the upper surface of each of the two movable blocks. A strip-shaped clamping groove extending along the axial direction of the ejector pin is provided on the surface of each clamping block facing the other clamping block.

[0006] The further improved scheme in the above technical scheme is as follows:

[0007] 1. In the above solution, the cross-section of the strip clamping groove is V-shaped or arc-shaped.

[0008] 2. In the above solution, the lower end of the movable bracket is connected to the piston rod of a cylinder installed on the base plate.

[0009] 3. In the above solution, the cylinder is movably mounted on the upper surface of the base plate through a movable carrier plate.

[0010] 4. In the above solution, the lower surface of the movable carrier plate and the upper surface of the base plate are connected by at least one set of slide rails and sliders.

[0011] 5. In the above solution, a vertically extending strip-shaped mounting groove is provided on the movable bracket, and one end of the ejector pin passes through the strip-shaped mounting groove and can move in the strip-shaped mounting groove.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The positioning mechanism of the precision thin-walled tube of the utility model has a V-shaped supporting groove for the hollow pipe fitting to be embedded in the upper surface of the support block, and an outward protrusion is provided on the end surface of the main body of the positioning block facing one end of the ejector pin, and the conical protrusion is coaxially arranged with the ejector pin and can be embedded in the hollow pipe fitting, and a horizontally arranged mounting plate is provided below the ejector pin, and a pneumatic clamp is installed on the upper surface of the other end of the mounting plate connected to the movable bracket at one end, and two movable blocks of the pneumatic clamp located between the ejector pin and the support block can approach or move away from each other in the horizontal direction, and a clamping block is respectively installed on the upper surface of the two movable blocks, and a strip clamping groove extending along the axial direction of the ejector pin is provided on the surface of each clamping block facing the other clamping block, which can realize the clamping and positioning of the hollow pipe fitting at both ends and facilitate the taking and placing of the central pipe fitting, and at the same time, can improve the position accuracy and stability of the hollow pipe fitting in the process of moving in the horizontal direction, and can also perform centering calibration of the position of the hollow pipe fitting in the horizontal radial direction, so as to further improve the position accuracy of the hollow pipe fitting in the final clamping state. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is a structural schematic diagram of the positioning mechanism of the precision thin-walled tube of the utility model;

[0015] Attached Figure 2 It is an enlarged structural diagram of one end of the positioning mechanism of the precision thin-walled tube of the utility model;

[0016] Attached Figure 3 It is an enlarged structural diagram of the other end of the positioning mechanism of the precision thin-walled tube of the utility model.

[0017] In the above drawings: 100, hollow pipe fitting; 1, base plate; 2, fixed bracket; 3, movable bracket; 31, strip mounting groove; 4, support block; 41, V-shaped support groove; 5, positioning block; 51, main body; 52, raised portion; 6, ejector pin; 7, cylinder; 8, movable carrier plate; 9, mounting plate; 10, pneumatic clamp; 11, movable block; 12, clamping block; 121, strip clamping groove. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A positioning mechanism for a precision thin-walled tube, comprising: a base plate 1, a fixed bracket 2 mounted on one end of the base plate 1, a movable bracket 3 arranged at the other end of the base plate 1, and at least two support blocks 4 spaced apart and arranged between the fixed bracket 2 and the movable bracket 3, wherein the fixed bracket 2 is provided with a positioning block 5 on the side facing the movable bracket 3, the movable bracket 3 is provided with a ejector pin 6 arranged towards the positioning block 5, the upper surface of the support block 4 is provided with a V-shaped supporting groove 41 for embedding a hollow pipe 100, the main body 51 of the positioning block 5 has an outward protrusion 52 on the end surface facing the ejector pin 6, the conical protrusion 52 is coaxially arranged with the ejector pin 6 and can be embedded in the hollow pipe 100;

[0020] A horizontally arranged mounting plate 9 is provided below the ejector pin 6, and a pneumatic clamp 10 is installed on the upper surface of the other end of the mounting plate 9 connected to the movable bracket 3 at one end. The two movable blocks 11 of the pneumatic clamp 10 located between the ejector pin 6 and the support block 4 can approach or move away from each other in the horizontal direction, and a clamping block 12 is respectively installed on the upper surface of the two movable blocks 11. A strip-shaped clamping groove 121 extending along the axial direction of the ejector pin 6 is provided on the surface of each clamping block 12 facing the other clamping block 12.

[0021] The cross section of the strip-shaped clamping groove 121 is V-shaped;

[0022] The lower end of the movable bracket 3 is connected to a piston rod of a cylinder 7 mounted on the base plate 1 ; the cylinder 7 is movably mounted on the upper surface of the base plate 1 through a movable carrier plate 8 .

[0023] Embodiment 2: A positioning mechanism for a precision thin-walled tube, comprising: a base plate 1, a fixed bracket 2 mounted on one end of the base plate 1, a movable bracket 3 arranged at the other end of the base plate 1, and at least two support blocks 4 spaced apart and arranged between the fixed bracket 2 and the movable bracket 3, wherein the fixed bracket 2 is provided with a positioning block 5 on the side facing the movable bracket 3, the movable bracket 3 is provided with a ejector pin 6 arranged towards the positioning block 5, the upper surface of the support block 4 is provided with a V-shaped supporting groove 41 for embedding a hollow pipe 100, the main body 51 of the positioning block 5 has an outward protrusion 52 on the end surface facing the ejector pin 6, the conical protrusion 52 is coaxially arranged with the ejector pin 6 and can be embedded in the hollow pipe 100;

[0024] A horizontally arranged mounting plate 9 is provided below the ejector pin 6, and a pneumatic clamp 10 is installed on the upper surface of the other end of the mounting plate 9 connected to the movable bracket 3 at one end. The two movable blocks 11 of the pneumatic clamp 10 located between the ejector pin 6 and the support block 4 can approach or move away from each other in the horizontal direction, and a clamping block 12 is respectively installed on the upper surface of the two movable blocks 11. A strip-shaped clamping groove 121 extending along the axial direction of the ejector pin 6 is provided on the surface of each clamping block 12 facing the other clamping block 12.

[0025] The cross section of the strip-shaped clamping groove 121 is arc-shaped;

[0026] The lower end of the movable bracket 3 is connected to a piston rod of a cylinder 7 mounted on the base plate 1;

[0027] The cylinder 7 is movably mounted on the upper surface of the base plate 1 through a movable carrier plate 8;

[0028] The lower surface of the movable carrier plate 8 and the upper surface of the base plate 1 are connected by at least one set of slide rails and sliders;

[0029] The movable bracket 3 is provided with a vertically extending strip-shaped installation groove 31 , and one end of the ejector pin 6 passes through the strip-shaped installation groove 31 and can move in the strip-shaped installation groove 31 .

[0030] When in use, first move the movable bracket to the farthest distance from the fixed bracket, and place the pneumatic clamps in the open state;

[0031] The hollow pipe is transported between the positioning block and the ejector pin and the horizontally extending hollow pipe is embedded in the V-shaped support groove of each support block, the hollow pipe, the protrusion of the positioning block and the ejector pin are in a coaxial state, and one end of the hollow pipe is located between the two clamping blocks;

[0032] Switch the pneumatic clamp to the clamping state, so that the inner walls of the strip clamping grooves on the two clamping blocks are in extrusion contact with the outer circumference of the hollow pipe;

[0033] The movable bracket is driven to move a distance H1 toward the fixed bracket, so that the hollow pipe clamped between the two clamping blocks moves the same distance H1 toward the positioning block on the fixed bracket along with the movable bracket, so that a part of the protrusion on the positioning block is embedded in the hollow pipe;

[0034] Switch the pneumatic clamp to the open state, and then continue to drive the movable bracket to move a distance H2 in the direction of the fixed bracket, so that the ejector pin that moves with the movable bracket is embedded in one end of the hollow pipe fitting and pushes the hollow pipe fitting to move until the end face of the other end of the hollow pipe fitting contacts the end face of the main body of the positioning block facing the ejector pin end, thereby achieving clamping and positioning of the two ends of the hollow pipe fitting.

[0035] When the above-mentioned positioning mechanism of the precision thin-walled tube is adopted, it can realize the clamping and positioning of the hollow tube fittings at both ends and facilitate the picking and placing of the central tube fittings. At the same time, it can improve the position accuracy and stability of the hollow tube fittings during the horizontal movement, and can calibrate the position of the hollow tube fittings in the horizontal radial direction, thereby further improving the position accuracy of the hollow tube fittings in the final clamping state.

[0036] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A positioning mechanism for a precision thin-walled tube, comprising: A base plate (1), a fixed bracket (2) mounted on one end of the base plate (1), a movable bracket (3) arranged at the other end of the base plate (1), and at least two support blocks (4) arranged between the fixed bracket (2) and the movable bracket (3) at intervals, wherein the fixed bracket (2) is provided with a positioning block (5) on the side facing the movable bracket (3), and the movable bracket (3) is provided with a ejector pin (6) arranged towards the positioning block (5), characterized in that: a V-shaped supporting groove (41) is provided on the upper surface of the support block (4) for the hollow pipe (100) to be embedded, and an outward protrusion (52) is provided on the end surface of the main body (51) of the positioning block (5) facing the ejector pin (6), and the conical protrusion (52) is coaxially arranged with the ejector pin (6) and can be embedded in the hollow pipe (100); A horizontally arranged mounting plate (9) is provided below the ejector pin (6); a pneumatic clamp (10) is installed on the upper surface of the other end of the mounting plate (9) connected to the movable bracket (3) at one end; two movable blocks (11) of the pneumatic clamp (10) located between the ejector pin (6) and the support block (4) can move closer to or farther from each other in a horizontal direction; a clamping block (12) is installed on the upper surface of each of the two movable blocks (11); and a strip-shaped clamping groove (121) extending along the axial direction of the ejector pin (6) is provided on the surface of each of the clamping blocks (12) facing the other clamping block (12).

2. The positioning mechanism for a precision thin-walled tube according to claim 1, characterized in that: The cross section of the strip-shaped clamping groove (121) is V-shaped or arc-shaped.

3. The positioning mechanism for a precision thin-walled tube according to claim 1, characterized in that: The lower end of the movable bracket (3) is connected to a piston rod of a cylinder (7) mounted on the base plate (1).

4. The positioning mechanism for the precision thin-walled tube according to claim 3, characterized in that: The cylinder (7) is movably mounted on the upper surface of the base plate (1) via a movable carrier plate (8).

5. The positioning mechanism for a precision thin-walled tube according to claim 4, characterized in that: The lower surface of the movable carrier plate (8) and the upper surface of the base plate (1) are connected in cooperation with each other via at least one set of slide rails and slide blocks.

6. The positioning mechanism for a precision thin-walled tube according to claim 1, characterized in that: The movable bracket (3) is provided with a vertically extending strip-shaped installation groove (31), and one end of the ejector pin (6) passes through the strip-shaped installation groove (31) and can move in the strip-shaped installation groove (31).

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