Automatic assembling mechanism for hard plastic check ring

Abstract

The utility model discloses an automatic hard plastic check ring assembling mechanism which comprises a bottom plate connected with a top plate through a stand column, the top plate is connected with an air cylinder, an extending rod of the air cylinder is downwards connected with a press-fitting mechanism, the press-fitting mechanism is downwards connected with a press-fitting barrel, and the end, to be sleeved with a plastic check ring, of a workpiece faces upwards and bears a frustum-shaped guide block upwards. The diameter of the lower end of the guide block is equal to the diameter of the end, to be sleeved with the plastic check ring, of the workpiece, the circumferential surface of the guide block is used for bearing the plastic check ring to be press-fitted, and the guide block faces the press-fitting cylinder upwards. When the air cylinder is pressed downwards, the press-fitting barrel is driven to move downwards, the plastic check ring moves downwards along the guide block, and the plastic check ring is naturally and evenly expanded by the guide block and is smoothly sleeved into a workpiece rubber ring groove. The press fitting process does not depend on manual operation of the plastic check ring, the check ring is evenly stressed in the circumferential direction, the check ring is prevented from being scratched and turned over and twisted, the assembly efficiency is greatly improved, and the problem of oil leakage of an engine is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a technology for assembling a hard plastic retaining ring in a rubber ring groove of a workpiece. Background Art

[0002] Hard plastic retaining rings have good auxiliary sealing and supporting functions, high temperature resistance, good chemical stability and wear resistance, and can also reduce vibration and noise in some designs. They are widely used in industry and in automotive filters. The parts that use (or are to be inserted into) hard plastic retaining rings are called workpieces.

[0003] Since the inner diameter of the hard plastic retaining ring is much smaller than the diameter of the rubber ring groove of the workpiece, it is necessary to expand the hard plastic retaining ring before inserting it into the rubber ring groove of the workpiece during assembly. The traditional hard plastic retaining ring assembly is completely completed by manual assembly. The manual assembly method has the risk of scratching the retaining ring and causing it to flip and twist during the assembly process. In addition, since the elasticity of the hard plastic retaining ring is too small, it is difficult to manually assemble the hard plastic retaining ring, and the technical requirements for the operator are very high. Not only is it easy to scratch the retaining ring or cause it to flip and twist, but the assembly efficiency is also low. Utility Model Content

[0004] The utility model aims to provide an automatic assembly mechanism for a hard plastic retaining ring, which replaces manual assembly with mechanical assembly to avoid the risk of the retaining ring being scratched and flipped and twisted, thereby improving assembly efficiency.

[0005] To achieve the above-mentioned purpose, the automatic assembly mechanism of the hard plastic retaining ring of the utility model comprises a bottom plate, the bottom plate is connected to a top plate through a column or a vertical plate, the top plate is connected to a cylinder, the extension rod of the cylinder extends downward from the top plate and is connected to a press-fitting mechanism, and the press-fitting mechanism is connected downward to an elastic press-fitting cylinder. The workpiece to be installed with the plastic retaining ring is placed on the bottom plate directly below the press-fitting cylinder, the end of the workpiece (the part to be inserted into the hard plastic retaining ring) to be inserted into the plastic retaining ring faces upward and carries a frustum-shaped guide block upward, the guide block is small at the top and large at the bottom, and its upper end diameter is smaller than the inner diameter of the press-fitting cylinder, the lower end diameter of the guide block is the same as the end diameter of the workpiece to be inserted into the plastic retaining ring, the circumferential surface of the guide block is used to carry the plastic retaining ring to be pressed, and the guide block faces the press-fitting cylinder upward.

[0006] The bottom plate is connected with a workpiece holder for carrying the workpiece, and the workpiece holder is located just below the press cylinder and is adapted to the workpiece.

[0007] The press-fitting mechanism includes a gantry frame, the top of which is connected to the extension rod of the cylinder, the bottom of which is connected to a guide plate, the middle of which is protruding downward and provided with a guide protrusion, the guide plate and the guide protrusion are integrally arranged and provided with a guide slide hole inside, a guide rod is slidably penetrated in the guide slide hole, the top of the guide rod extends upward from the guide plate and is screwed with an anti-drop nut, the guide rod extends downward into the press-fitting cylinder and the bottom of which is radially protruding and provided with an anti-shrinkage block, the outer diameter of which matches the inner diameter of the press-fitting cylinder; a reset spring is provided on the guide rod between the anti-shrinkage block and the guide protrusion; when the reset spring is in a relaxed state, the lower end of the anti-shrinkage block is flush with the lower end of the press-fitting cylinder. The anti-shrinkage block is used to smoothly sleeve the press-fitting cylinder downward on the guide block.

[0008] The elastic press cylinder adopts any one of the following settings:

[0009] A. The press-fitting cylinder includes a plurality of circumferential units, each of which includes a vertically arranged arc-shaped sheet, and the top of each arc-shaped sheet is connected to a horizontally arranged fan-shaped plate; each arc-shaped sheet is provided with a groove extending in the circumferential direction, each arc-shaped sheet is surrounded by a cylinder, and each groove is correspondingly connected to form an annular embedded groove, and an elastic ring is sleeved in the annular embedded groove, and the annular embedded groove and the elastic ring are provided with two or more paths at intervals up and down and are used to constrain each arc-shaped sheet together to form a cylindrical structure; when each arc-shaped sheet forms a cylindrical structure under the constraint of the elastic ring, each fan-shaped plate is adjacent to each other and surrounds a horizontal annular plate, and each fan-shaped plate is used to suspend the press-fitting cylinder;

[0010] B. The press cylinder is a rubber cylinder or a plastic cylinder.

[0011] The utility model has the following advantages:

[0012] The utility model has a simple structure and is easy to use. When the cylinder is pressed downward, it drives the press-fitting cylinder to move downward, so that the plastic retaining ring can move downward along the guide block. During the downward movement, the plastic retaining ring is naturally evenly expanded by the guide block with a small top and a large bottom, so that it can be smoothly inserted into the rubber ring groove on the workpiece. The above-mentioned press-fitting process does not rely on manual operation of the plastic retaining ring. The retaining ring is subjected to uniform downward pressure in the circumferential direction, avoiding the risk of scratching the retaining ring and flipping and twisting. It not only greatly improves the assembly efficiency, but also avoids the problem of engine oil leakage caused by the flipping and twisting of the plastic retaining ring after the workpiece is installed on the motor vehicle.

[0013] The structure of the workpiece holder is adapted to the workpiece to be inserted into the hard plastic retaining ring, so the workpiece can be conveniently and accurately fixed directly below the press-fitting cylinder through the workpiece holder.

[0014] The anti-shrinkage block in the press-fitting mechanism can ensure that the press-fitting cylinder can be smoothly sleeved downward on the cone-shaped guide block. After the anti-shrinkage block is pressed downward on the guide block, the guide rod and the guide slide hole slide relative to each other, which does not hinder the press-fitting cylinder from continuing to press the plastic retaining ring downward. When the press-fitting mechanism rises upward with the extension rod of the cylinder, the guide rod and the guide slide hole slide relative to each other and return to their original positions under the action of the return spring, so that the lower end of the anti-shrinkage block is restored to a state flush with the lower end of the press-fitting cylinder, preparing for the next press-fitting of the plastic retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is a cross-sectional view of the press cylinder using structure A.

[0017] Figure 3 yes Figure 2 Top view of the . DETAILED DESCRIPTION

[0018] like Figures 1 to 3 As shown, the automatic assembly mechanism of the hard plastic retaining ring of the utility model comprises a bottom plate 1, the bottom plate 1 is connected to a top plate 3 through a column 2 (or a vertical plate), the top plate 3 is connected to a cylinder 4, the extension rod 5 of the cylinder 4 extends downward from the top plate 3 and is connected to a press-fitting mechanism, and the press-fitting mechanism is downwardly connected to an elastic press-fitting cylinder 6. The workpiece 7 to be installed with the plastic retaining ring 9 is placed on the bottom plate 1 just below the press-fitting cylinder 6, the end of the workpiece 7 (the part to be inserted into the hard plastic retaining ring 9) to be inserted into the plastic retaining ring 9 faces upward and carries a frustum-shaped guide block 8 upward, the guide block 8 is small at the top and large at the bottom, and its upper end diameter is smaller than the inner diameter of the press-fitting cylinder 6, the lower end diameter of the guide block 8 is the same as the end diameter of the workpiece 7 to be inserted into the plastic retaining ring 9, the circumferential surface of the guide block 8 is used to carry the plastic retaining ring 9 to be pressed, and the guide block 8 faces the press-fitting cylinder 6 upward.

[0019] The utility model has a simple structure and is easy to use. When the cylinder 4 is pressed downward, it drives the press-fitting cylinder 6 to move downward, so that the plastic retaining ring 9 can move downward along the guide block 8. During the downward movement, the plastic retaining ring 9 is naturally evenly expanded by the guide block 8 with a small upper part and a large lower part, so that it can be smoothly inserted into the rubber ring groove on the workpiece 7. The above-mentioned press-fitting process does not rely on manual operation of the plastic retaining ring 9. The retaining ring is subjected to uniform downward pressure in the circumferential direction, avoiding the risk of scratching the retaining ring and flipping and twisting. It not only greatly improves the assembly efficiency, but also avoids the problem of engine oil leakage caused by the flipping and twisting of the plastic retaining ring 9 after the workpiece 7 is installed on the motor vehicle.

[0020] The base plate 1 is connected with a workpiece holder 10 for carrying the workpiece 7 . The workpiece holder 10 is located directly below the press cylinder 6 and is adapted to the workpiece 7 .

[0021] The structure of the workpiece holder 10 is adapted to the workpiece 7 to be inserted into the hard plastic retaining ring 9 , so the workpiece 7 can be conveniently and accurately fixed directly below the press-fitting cylinder 6 through the workpiece holder 10 .

[0022] The pressing mechanism includes a gantry 11, the top of which is connected to the extending rod 5 of the cylinder 4, and the bottom of the gantry 11 is connected to a guide plate 12. A guide protrusion 13 is provided in the middle of the guide plate 12 and protrudes downward. The guide plate 12 and the guide protrusion 13 are integrally arranged and provided with a guide slide hole therein. A guide rod 14 is slidably penetrated in the guide slide hole. The top of the guide rod 14 extends upward from the guide plate 12 and is screwed with an anti-slip nut 15. The anti-slip nut 15 is used to prevent the guide rod 14 from falling off the guide slide hole downward.

[0023] The guide plate 12 is connected downwardly to a connecting frame 20 , a horizontal hanging portion 21 is provided at the top of the press-fitting cylinder, the top of the press-fitting cylinder and the hanging portion 21 extend upwardly into the connecting frame 20 , the guide protrusion 13 presses the press-fitting cylinder 6 downwardly, and the hanging portion 21 presses the bottom plate of the connecting frame 20 downwardly.

[0024] The guide rod 14 extends downward into the press-fitting cylinder 6 and a shrinkage-proof block 16 is radially protruded at its bottom end, and the outer diameter of the shrinkage-proof block 16 matches the inner diameter of the press-fitting cylinder 6; a return spring 17 is provided on the guide rod 14 between the shrinkage-proof block 16 and the guide protrusion 13; when the return spring 17 is in a relaxed state, the lower end of the shrinkage-proof block 16 is flush with the lower end of the press-fitting cylinder 6. The shrinkage-proof block 16 is used to smoothly sleeve the press-fitting cylinder 6 downward onto the guide block 8.

[0025] The anti-shrinkage block 16 in the press-fitting mechanism can ensure that the press-fitting cylinder 6 can be smoothly sleeved downward on the cone-shaped guide block 8. After the anti-shrinkage block 16 is pressed downward on the guide block 8, the guide rod 14 slides relative to the guide slide hole, which does not hinder the press-fitting cylinder 6 from continuing to press the plastic retaining ring 9 downward. When the press-fitting mechanism rises upward with the extension rod 5 of the cylinder 4, the guide rod 14 slides relative to the guide slide hole and returns to its original position under the action of the return spring 17, so that the lower end of the anti-shrinkage block 16 is restored to a state flush with the lower end of the press-fitting cylinder 6, ready for the next press-fitting of the plastic retaining ring 9.

[0026] The elastic press cylinder 6 adopts any one of the following two settings:

[0027] A. The press-fitting cylinder 6 includes a plurality of (16 in the attached figure) circumferential units, each of which includes a vertically arranged arc-shaped piece 18, and the top of each arc-shaped piece 18 is connected to a horizontally arranged fan-shaped plate 19; each arc-shaped piece 18 is provided with a groove extending along the circumferential direction, each arc-shaped piece 18 is surrounded by a cylindrical shape and each groove is connected to form an annular embedding groove 22, and an elastic ring (such as a spring ring or an annular structure made of other elastic materials) is sleeved in the annular embedding groove 22. The elastic ring is conventional technology and is not shown in the figure.

[0028] The annular groove 22 and the elastic ring are spaced apart by two or more paths above and below and are used to constrain the arc-shaped pieces 18 together to form a cylindrical structure; when the arc-shaped pieces 18 form a cylindrical structure under the constraint of the elastic ring, the sector plates 19 are adjacent to each other and form a horizontal annular plate, which serves as the hanging portion 21; the sector plates 19 are used to suspend the press-fitting cylinder.

[0029] B. The press-fitting cylinder 6 is a rubber cylinder or a plastic cylinder.

[0030] During operation, the workpiece 7 to be installed with the plastic retaining ring 9 is clamped on the workpiece clamping seat 10 and the end of the workpiece 7 inserted into the plastic retaining ring 9 is facing upwards; after positioning the workpiece 7 through the workpiece clamping seat 10, the frustum-shaped guide block 8 is placed on the top of the workpiece 7 and directly facing the press-fitting cylinder 6, and the plastic retaining ring 9 is sleeved on the guide block 8 from top to bottom. The cylinder 4 is started, and the extension rod 5 of the cylinder 4 extends downward, so that the press-fitting cylinder 6 is sleeved on the frustum-shaped guide block 8 from top to bottom and continues to move downward. After the anti-shrinkage block 16 is pressed downward on the guide block 8, the guide rod 14 slides relative to the guide slide hole, which does not hinder the press-fitting cylinder 6 from continuing to press the plastic retaining ring 9 downward.

[0031] When the press-fitting cylinder 6 adopts structure A, the arcuate pieces 18 are restrained together by the elastic force of the elastic ring. In the process of continuing to move downward after being inserted into the frustum-shaped guide block 8, the elastic ring is expanded by the frustum-shaped guide block, and the cylindrical structure surrounded by the arcuate pieces 18 is also expanded between the elastic ring and the frustum-shaped guide block 8, so that the plastic retaining ring 9 can be pressed downward in the circumferential direction. When the press-fitting cylinder 6 is reset upward, the arcuate pieces 18 contract centripetally under the constraint of the elastic ring, so that the press-fitting cylinder 6 also returns to its original state (original diameter).

[0032] When the press-fitting cylinder 6 adopts the B structure, it is elastic as a whole, so it is expanded by the frustum-shaped guide block 8 during the downward displacement, and the plastic retaining ring 9 is pressed downward in the circumferential direction. When the press-fitting cylinder 6 is reset upward and leaves the constraint of the guide block 8, the press-fitting cylinder 6 also returns to its original size (diameter) under the action of its own elastic force.

[0033] The plastic retaining ring 9 is expanded by the cone-shaped guide block 8 during the downward displacement, and smoothly sleeved on the top of the workpiece 7, and then continues to enter the rubber ring groove under the downward pressure of the press cylinder 6. At this time, the extension rod 5 of the cylinder 4 just reaches the limit position of its downward stroke. The control cylinder 4 retracts its extension rod 5, and under the action of the return spring 17, the lower end of the anti-shrinkage block 16 returns to a state flush with the lower end of the press cylinder 6, and the press cylinder 6 also returns to its original position and original contracted state.

[0034] Remove the workpiece 7, clamp the next workpiece 7 on the workpiece holder 10, repeat the above process, and perform an efficient plastic retaining ring 9 installation process.

[0035] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. Automatic assembly mechanism for hard plastic retaining ring, characterized by: The invention comprises a bottom plate, which is connected to a top plate through a column, and the top plate is connected to a cylinder, an extension rod of the cylinder extends downwardly out of the top plate and is connected to a pressing mechanism, and the pressing mechanism is downwardly connected to an elastic pressing cylinder, and a workpiece to be installed with a plastic retaining ring is placed on the bottom plate directly below the pressing cylinder, and the end of the workpiece to be inserted into the plastic retaining ring faces upward and carries a frustum-shaped guide block upward, the guide block is small at the top and large at the bottom, and its upper end diameter is smaller than the inner diameter of the pressing cylinder, and the lower end diameter of the guide block is the same as the end diameter of the workpiece to be inserted into the plastic retaining ring, and the circumferential surface of the guide block is used to carry the plastic retaining ring to be pressed, and the guide block faces the pressing cylinder upward.

2. The automatic assembly mechanism for hard plastic retaining ring according to claim 1 is characterized in that: The bottom plate is connected with a workpiece holder for carrying the workpiece, and the workpiece holder is located just below the press cylinder and is adapted to the workpiece.

3. The automatic assembly mechanism for hard plastic retaining ring according to claim 1, characterized in that: The pressing mechanism includes a gantry, the top of the gantry is connected to the extending rod of the cylinder, the bottom of the gantry is connected to a guide plate, the middle of the guide plate protrudes downward and is provided with a guide protrusion, the guide plate and the guide protrusion are integrally arranged and a guide slide hole is arranged inside, a guide rod is slidably passed through the guide slide hole, the top of the guide rod extends upward from the guide plate and is screwed with an anti-slip nut, the guide rod extends downward into the pressing cylinder and a shrinkage block is radially protruded at the bottom end, the outer diameter of the shrinkage block matches the inner diameter of the pressing cylinder; a reset spring is arranged on the guide rod between the shrinkage block and the guide protrusion; when the reset spring is in a relaxed state, the lower end of the shrinkage block is flush with the lower end of the pressing cylinder.

4. The automatic assembly mechanism for a hard plastic retaining ring according to any one of claims 1 to 3, characterized in that: The elastic press cylinder adopts any one of the following settings: A. The press-fitting cylinder includes a plurality of circumferential units, each of which includes a vertically arranged arc-shaped sheet, and the top of each arc-shaped sheet is connected to a horizontally arranged fan-shaped plate; each arc-shaped sheet is provided with a groove extending in the circumferential direction, each arc-shaped sheet is surrounded by a cylinder, and each groove is correspondingly connected to form an annular embedded groove, and an elastic ring is sleeved in the annular embedded groove, and the annular embedded groove and the elastic ring are provided with two or more paths at intervals up and down and are used to constrain each arc-shaped sheet together to form a cylindrical structure; when each arc-shaped sheet forms a cylindrical structure under the constraint of the elastic ring, each fan-shaped plate is adjacent to each other and surrounds a horizontal annular plate, and each fan-shaped plate is used to suspend the press-fitting cylinder; B. The press cylinder is a rubber cylinder or a plastic cylinder.

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