Anti-deformation piston pin

Abstract

The utility model provides an anti-deformation piston pin, which belongs to the technical field of piston pins and comprises a piston pin body. The piston rod is fixedly connected into the piston pin body; the piston pin inner hole is formed in one side end of the piston pin body; the inner hole push block is fixedly connected to the circumferential inner wall of the inner hole of the piston pin; the number of the mounting grooves is two, and the two mounting grooves are both formed in the circumferential surface of the piston pin body; the number of the fixed inserting grooves is multiple, and the multiple fixed inserting grooves are all formed in the circumferential surface of the piston rod; the multiple connecting grooves are formed, and the multiple connecting grooves are formed in the circumferential inner wall of the mounting groove; thrust on the supporting block is dispersed through the sealing block, and deformation of the piston pin body caused by the fact that the thrust of the piston rod on the inner hole of the piston pin body is too large when the piston moves is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston pins, and in particular relates to an anti-deformation piston pin. Background Art

[0002] The piston pin is a cylindrical pin installed on the piston skirt. Its middle part passes through the small hole of the connecting rod and is used to connect the piston and the connecting rod. Its function is to transmit the gas force borne by the piston to the connecting rod, or to make the small end of the connecting rod drive the piston to move together. In order to reduce weight, the piston pin is generally made of high-quality alloy steel and made hollow.

[0003] Authorization publication number "CN209430299U" discloses a piston pin of a motor, which belongs to the technology of engine accessories. It solves the problem of low structural strength of the existing piston pin. The piston pin of this engine includes a piston pin body, an annular cylinder is arranged in the piston pin body, and two symmetrically arranged limit ring sleeves are also arranged in the piston pin body. The inner diameters of the two limit ring sleeves are both larger than the inner diameter of the annular cylinder. The inner end faces of the two limit ring sleeves are respectively fitted with the end faces of the corresponding annular cylinders, and the outer end faces of the two limit ring sleeves are respectively flush with the end faces of the corresponding piston pin body. Two symmetrically arranged limit pins are arranged on the outer peripheral wall of the piston pin body located at the two limit ring sleeves. The end of the limit pin that penetrates into the piston pin body continues to extend axially inward and penetrates into the corresponding limit ring sleeve. The end of the limit pin that penetrates into the corresponding limit ring sleeve does not penetrate the inner peripheral wall of the limit ring sleeve. The utility model has the advantages of high structural strength and stable structure.

[0004] The above-mentioned new type has the advantages of high structural strength and stable structure, but the above-mentioned new type piston reciprocates in the engine. When the piston moves and contacts the inner wall of the cylinder, it exerts impact force on the piston pin and the piston rod. The connection between the piston pin and the piston rod is a vertical plane, which cannot disperse the impact force. Long-term use can easily cause deformation of the piston pin. Utility Model Content

[0005] The utility model aims to provide an anti-deformation piston pin, aiming to solve the problem in the prior art that the connection between the piston pin and the piston rod is a vertical surface, the impact force cannot be dispersed, and the piston pin is easily deformed after long-term use.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A deformation-resistant piston pin, comprising:

[0008] Piston pin body;

[0009] A piston rod, wherein the piston rod is fixedly connected to the piston pin body;

[0010] A piston pin inner hole, wherein the piston pin inner hole is opened at one side end of the piston pin body;

[0011] An inner hole push block, the inner hole push block is fixedly connected to the circumferential inner wall of the inner hole of the piston pin;

[0012] A mounting groove, wherein two mounting grooves are provided, and both mounting grooves are opened on the circumferential surface of the piston pin body;

[0013] A fixing slot, wherein a plurality of the fixing slots are provided, and the plurality of fixing slots are all opened on the circumferential surface of the piston rod;

[0014] A connecting groove, wherein a plurality of the connecting grooves are provided, and the plurality of connecting grooves are all opened on the circumferential inner wall of the mounting groove;

[0015] A supporting block, wherein a plurality of the supporting blocks are provided, and the plurality of the supporting blocks are respectively fixedly connected to a plurality of fixing slots and connecting slots;

[0016] The closing block is provided with two closing blocks, and the two closing blocks are respectively fixedly connected in the two mounting grooves.

[0017] As a preferred solution of the utility model, one side end of the plurality of support blocks is an arc surface, which has the same arc as the circumferential inner wall of the installation groove.

[0018] As a preferred solution of the utility model, the closing block is fixed in the installation groove by welding, and the surface of the piston pin body is kept smooth, and the circumferential surface of the piston pin body is sleeved with a piston.

[0019] As a preferred solution of the utility model, the inner hole push block is a trapezoidal inner hole.

[0020] As a preferred solution of the utility model, two sealing rings are fixedly connected to the circumferential inner wall of the piston pin inner hole.

[0021] As a preferred solution of the utility model, the sealing ring is a sealing rubber made of polyurethane material.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] 1. In this scheme, through this device, since the support block is inserted into the piston rod at an angle, the extrusion force between the piston pin body and the piston rod is converted into a thrust force that pushes the support block outward, and then the thrust on the support block is dispersed through the closing block, thereby preventing the piston rod from thrusting the inner hole of the piston pin body too much when the piston moves, thereby preventing the piston pin body from being deformed due to excessive thrust.

[0024] 2. In this solution, through this device, after the closing block is installed outside the installation groove, the closing block is fixed by welding, so that the closing block and the piston pin body form an integral body to support the support block, keep the welding surface smooth, and no connection gap will appear when the piston sleeve is arranged outside the piston pin body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a first structural stereogram of the utility model;

[0027] Figure 2 It is a third structural perspective view of the second structure in the utility model;

[0028] Figure 3 It is a cross-sectional exploded view of the first structure in the utility model;

[0029] Figure 4 It is a cross-sectional exploded view of the second structure in the utility model.

[0030] In the figure: 1. piston pin body; 2. piston rod; 3. piston pin inner hole; 4. inner hole push block; 5. mounting groove; 6. fixing slot; 7. connecting groove; 8. supporting block; 9. closing block; 10. sealing ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Example

[0033] See also Figure 1-Figure 4 , the utility model provides the following technical solutions:

[0034] A deformation-resistant piston pin, comprising:

[0035] Piston pin body 1;

[0036] A piston rod 2, the piston rod 2 is fixedly connected to the piston pin body 1;

[0037] A piston pin inner hole 3, which is provided at one side end of the piston pin body 1;

[0038] An inner hole push block 4, which is fixedly connected to the circumferential inner wall of the piston pin inner hole 3;

[0039] A mounting groove 5, two mounting grooves 5 are provided, and both mounting grooves 5 are opened on the circumferential surface of the piston pin body 1;

[0040] A fixed slot 6, wherein a plurality of fixed slots 6 are provided, and the plurality of fixed slots 6 are all opened on the circumferential surface of the piston rod 2;

[0041] A connecting groove 7, wherein a plurality of connecting grooves 7 are provided, and the plurality of connecting grooves 7 are all opened on the circumferential inner wall of the mounting groove 5;

[0042] A supporting block 8, wherein a plurality of supporting blocks 8 are provided, and the plurality of supporting blocks 8 are respectively fixedly connected to the plurality of fixing slots 6 and the connecting slots 7;

[0043] The closing block 9 is provided with two closing blocks 9 , and the two closing blocks 9 are fixedly connected in the two mounting grooves 5 respectively.

[0044] In a specific embodiment of the utility model, the inner hole push block 4 is a protrusion in the inner hole 3 of the piston pin, which is sleeved on the surface of the piston rod 2, and is used to connect the piston pin body 1 and the piston rod 2 to allow or drive the piston rod 2 to move during movement. When the piston pin body 1 is installed, the piston pin body 1 is rotated to match the positions of the connecting groove 7 and the fixing slot 6, and then a plurality of support blocks 8 are inserted to complete the fixation between the piston pin body 1 and the piston rod 2, and then the closing block 9 is sleeved on the outer side of the support block 8 to close the installation groove 5. When the piston moves, The convex surfaces on both sides of the inner hole push block 4 push the piston rod 2 to move. When the piston collides with the end of the oil cylinder or the cylinder, the piston rod 2 disperses the impact force between the piston rod 2 and the piston pin body 1 through the support block 8 when the piston moves, and because the support block 8 is inserted into the piston rod 2 at an angle, the extrusion force between the piston pin body 1 and the piston rod 2 is converted into a thrust to push the support block 8 outward, and then the thrust on the support block 8 is dispersed through the closing block 9, so as to avoid excessive thrust of the piston rod 2 on the inner hole of the piston pin body 1 when the piston is moving, resulting in deformation of the piston pin body 1.

[0045] For details, please refer to Figure 1-Figure 4 One side end of the plurality of support blocks 8 is an arc surface, which has the same arc as the inner wall of the circumference of the mounting groove 5 .

[0046] In this embodiment: one end of the plurality of support blocks 8 is inserted into the fixed slot 6, and the other end is arc-shaped, with the same arc as the circumferential inner wall of the mounting groove 5, so that the inner wall of the mounting groove 5 remains smooth after the support block 8 is installed. After the closing block 9 is sleeved in the mounting groove 5 to fix the support block 8, no gap will appear between the closing block 9 and the mounting groove 5, thereby maintaining the supporting strength of the piston pin body 1 and preventing deformation.

[0047] For details, please refer to Figure 1-Figure 4The closing block 9 is fixed in the mounting groove 5 by welding, and the surface of the piston pin body 1 is kept smooth. The circumferential surface of the piston pin body 1 is sleeved with a piston.

[0048] In this embodiment: after the closing block 9 is installed outside the mounting groove 5, the closing block 9 is fixed by welding so that the closing block 9 and the piston pin body 1 form a whole to support the support block 8, keep the welding surface smooth, and no connection gap will appear when the piston sleeve is arranged outside the piston pin body 1.

[0049] For details, please refer to Figure 1-Figure 4 The inner hole push block 4 is a trapezoidal inner hole.

[0050] In this embodiment: the trapezoidal inner hole of the inner hole push block 4 provides thrust to the piston rod 2, the inclined surface of the inner hole push block 4 contacts the inclined surface of the piston rod 2 to push the piston rod 2 to move, and the contact between the inclined surfaces disperses the extrusion force applied by the piston pin body 1 to the piston rod 2 when the piston moves.

[0051] For details, please refer to Figure 1-Figure 4 Two sealing rings 10 are fixedly connected to the circumferential inner wall of the piston pin inner hole 3.

[0052] In this embodiment: the piston pin body 1 is arranged at both ends of the inner wall of the piston pin inner hole 3 to seal the piston pin inner hole 3 to prevent gas or hydraulic oil from flowing into the gap between the piston pin body 1 and the piston rod 2.

[0053] For details, please refer to Figure 1-Figure 4 The sealing ring 10 is a sealing rubber made of polyurethane material.

[0054] In this embodiment: the polyurethane seal has high tear strength, wear resistance and resilience, can maintain good sealing performance in high load and dynamic applications, and is particularly suitable for occasions that need to withstand repeated extrusion and stretching. The sealing ring 10 is arranged on both side ends of the piston pin body 1 and will not be subjected to the impact force of the piston movement.

[0055] The working principle and use process of the utility model are as follows: the inner hole push block 4 is a protrusion in the inner hole 3 of the piston pin, which is sleeved on the surface of the piston rod 2, and is used to connect the piston pin body 1 and the piston rod 2 to allow or drive the piston rod 2 to move when it is active. When the piston pin body 1 is installed, the piston pin body 1 is rotated to match the position of the connecting groove 7 and the fixing slot 6, and then a plurality of support blocks 8 are inserted to complete the fixation between the piston pin body 1 and the piston rod 2, and then the closing block 9 is sleeved on the outer side of the support block 8 to close the installation groove 5. When the piston moves, The convex surfaces on both sides of the inner hole push block 4 push the piston rod 2 to move. When the piston collides with the end of the oil cylinder or the cylinder, the piston rod 2 disperses the impact force between the piston rod 2 and the piston pin body 1 through the support block 8 when the piston moves. Since the support block 8 is inserted into the piston rod 2 at an angle, the extrusion force between the piston pin body 1 and the piston rod 2 is converted into a thrust to push the support block 8 outward, and then the thrust on the support block 8 is dispersed through the closing block 9, so as to avoid excessive thrust of the piston rod 2 on the inner hole of the piston pin body 1 when the piston is moving, resulting in deformation of the piston pin body 1.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A deformation-resistant piston pin, characterized in that: include: Piston pin body (1); A piston rod (2), wherein the piston rod (2) is fixedly connected to the piston pin body (1); A piston pin inner hole (3), wherein the piston pin inner hole (3) is provided at one side end of the piston pin body (1); An inner hole push block (4), wherein the inner hole push block (4) is fixedly connected to the circumferential inner wall of the piston pin inner hole (3); A mounting groove (5), wherein two mounting grooves (5) are provided, and both mounting grooves (5) are formed on the circumferential surface of the piston pin body (1); A fixed slot (6), wherein a plurality of the fixed slots (6) are provided, and the plurality of fixed slots (6) are all opened on the circumferential surface of the piston rod (2); A connecting groove (7), wherein a plurality of the connecting grooves (7) are provided, and the plurality of connecting grooves (7) are all opened on the circumferential inner wall of the mounting groove (5); A support block (8), wherein a plurality of the support blocks (8) are provided, and the plurality of the support blocks (8) are respectively fixedly connected to a plurality of fixed slots (6) and the connection slots (7); A closing block (9), wherein two closing blocks (9) are provided, and the two closing blocks (9) are respectively fixedly connected in two mounting grooves (5).

2. The anti-deformation piston pin according to claim 1, characterized in that: One side end of the plurality of support blocks (8) is an arc surface, which has the same arc as the circumferential inner wall of the installation groove (5).

3. The anti-deformation piston pin according to claim 2, characterized in that: The closing block (9) is fixed in the mounting groove (5) by welding, and the surface of the piston pin body (1) is kept smooth. The circumferential surface of the piston pin body (1) is sleeved with a piston.

4. The anti-deformation piston pin according to claim 3, characterized in that: The inner hole push block (4) is a trapezoidal inner hole.

5. The anti-deformation piston pin according to claim 4, characterized in that: Two sealing rings (10) are fixedly connected to the circumferential inner wall of the piston pin inner hole (3).

6. The anti-deformation piston pin according to claim 5, characterized in that: The sealing ring (10) is a sealing rubber made of polyurethane material.

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