Turbocharger power shaft gear pin

Abstract

The utility model belongs to the technical field of turbochargers, and particularly relates to a power shaft gear pin of a turbocharger, the power shaft gear pin penetrates through a center hole of a gear and is used for fixing the gear at the output end of a power shaft of the turbocharger, the power shaft gear pin comprises a first fixing pin, a second fixing pin and a third fixing pin, an assembling cavity is formed in the first pin body, and a first limiting convex ring is fixed on the circumferential surface of the first pin body; the second fixing pin comprises a second pin body; according to the gear pin, the gear pin is designed to be of a split structure composed of the first fixing pin and the second fixing pin, after assembly, the gear is limited from the two ends through the first limiting protruding ring and the second limiting protruding ring, the first stabilizing protruding block and the second stabilizing protruding block are inserted into the corresponding stabilizing grooves, and the stability of gear installation is guaranteed; the problem of looseness is avoided, and the gear is convenient to disassemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of turbochargers, and in particular relates to a gear pin of a turbocharger power shaft. Background Art

[0002] A turbocharger is actually an air compressor that increases the intake volume by compressing air. It uses the inertial impact of the exhaust gas discharged by the engine to drive the turbine in the turbine chamber. The turbine in turn drives the coaxial impeller. The impeller pressurizes the air sent from the air filter pipe and pressurizes it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the turbine speed also increase synchronously. The impeller compresses more air into the cylinder. The increase in air pressure and density can burn more fuel. By increasing the fuel amount and adjusting the engine speed accordingly, the engine's output power can be increased.

[0003] The gear pin is an important component of the turbocharger, which is used to fix the turbocharger gear with a key. The gear pin is fixed to the output end of the turbocharger power shaft by welding or other conventional means.

[0004] In the prior art, the gear pin is only fastened by a key and a peripheral positioning bolt. Although this can meet general usage requirements, there is a risk of loosening after long-term use, and the disassembly and maintenance of the gear is also relatively troublesome.

[0005] In order to solve the above problems, the present application proposes a turbocharger power shaft gear pin. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides a turbocharger power shaft gear pin, which has the characteristics of being easy to use, having high stability and easy maintenance.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a turbocharger power shaft gear pin, the power shaft gear pin passing through the center hole of the gear, and used to fix the gear to the output end of the turbocharger power shaft, the power shaft gear pin comprising:

[0008] a first fixing pin, the first fixing pin comprising a first pin body, an assembly cavity being defined within the first pin body, a first limiting convex ring being fixed to a circumferential surface of the first pin body, a plurality of first stabilizing protrusions being fixed to the first limiting convex ring and distributed at equal intervals along the circumferential direction, and a stabilizing groove being provided on an end surface of the gear for the first stabilizing protrusions to be embedded in;

[0009] The second fixing pin includes a second pin body, the second pin body is embedded in the assembly cavity and is fixedly connected to the first pin body using a locking member, a second limiting convex ring is fixed on the circumferential surface of the second pin body, and a plurality of second stabilizing protrusions equally spaced along the circumferential direction are fixed on the second limiting convex ring, and a stabilizing groove for the second stabilizing protrusion to be embedded in the end face of the gear.

[0010] As a preferred technical solution of the utility model, it also includes:

[0011] Positioning rods, a plurality of said positioning rods are fixed to the outer wall of the second pin body at equal intervals along the circumferential direction, and a positioning slot for the positioning rods to be embedded in the inner wall of the first pin body.

[0012] As an optimal technical solution of the present invention, the locking component is a countersunk bolt with a thread groove on the first pin body and a countersunk hole on the second pin body. The countersunk bolt passes through the countersunk hole and is screwed into the thread groove by thread engagement.

[0013] As a preferred technical solution of the present invention, the outer wall of the second pin body abuts against the inner wall of the assembly cavity.

[0014] As a preferred technical solution of the present invention, the first stabilizing protrusion and the second stabilizing protrusion are equal in size and abut against the inner wall of the stabilizing groove.

[0015] As a preferred technical solution of the present invention, the outer wall of the first pin body abuts against the inner wall of the center hole of the gear.

[0016] As a preferred technical solution of the present invention, the first pin body, the first limiting protruding ring and the first stabilizing protrusion are an integrated structure formed by forging.

[0017] As a preferred technical solution of the present invention, the second pin body, the second limiting protruding ring, the positioning insert rod and the second stabilizing protrusion are an integrated structure formed by forging.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the present invention, the gear pin is designed as a split structure consisting of a first fixing pin and a second fixing pin. After assembly, the first limiting convex ring and the second limiting convex ring are used to limit the gear from both ends, and the first stabilizing protrusion and the second stabilizing protrusion are inserted into the corresponding stabilizing groove to ensure the stability of the gear installation, avoid the problem of looseness, and make the gear disassembly and maintenance more convenient.

[0020] Other additional advantages and benefits of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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:

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the partial cross-sectional structure after decomposition in the utility model;

[0024] Figure 3 It is a schematic diagram of the partial cross-sectional structure after assembly in the utility model.

[0025] In the figure: 1. First fixing pin; 11. First pin body; 111. Assembly cavity; 112. Positioning slot; 113. Threaded groove; 12. First limiting cam; 13. First stabilizing protrusion; 2. Second fixing pin; 21. Second pin body; 211. Countersunk hole; 22. Second limiting cam; 23. Positioning rod; 24. Second stabilizing protrusion; 3. Countersunk bolt; 4. Gear; 41. Stabilizing groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 3 The utility model provides the following technical solutions: a turbocharger power shaft gear pin, the power shaft gear pin passes through the center hole of the gear 4, and is used to fix the gear 4 to the output end of the turbocharger power shaft. The power shaft gear pin includes: a first fixing pin 1 and a second fixing pin 2.

[0028] Further, by Figure 1-Figure 3As shown, in this embodiment, the first fixing pin 1 includes a first pin body 11, an assembly cavity 111 is provided in the first pin body 11, a first limiting convex ring 12 is fixed on the circumferential surface of the first pin body 11, and a plurality of first stabilizing protrusions 13 distributed at equal intervals in the circumferential direction are fixed on the first limiting convex ring 12, and a stabilizing groove 41 for the first stabilizing protrusion 13 to be embedded in the end face of the gear 4 is provided, and the second fixing pin 2 includes a second pin body 21, the second pin body 21 is embedded in the assembly cavity 111 and is fixedly connected to the first pin body 11 using a locking member, a second limiting convex ring 22 is fixed on the circumferential surface of the second pin body 21, and a plurality of second stabilizing protrusions 24 distributed at equal intervals in the circumferential direction are fixed on the second limiting convex ring 22, and a stabilizing groove 41 for the second stabilizing protrusion 24 to be embedded in the end face of the gear 4. After adopting the above scheme, when in use, the first pin body 11 is first moved. The conventional means are used to fix the output end of the turbocharger power shaft, and then the gear 4 is put on the first pin body 11, and the gear 4 is pushed to move until the gear 4 is against the first limiting convex ring 12, and the first stabilizing protrusion 13 is embedded in the stabilizing groove 41. Then, the second pin body 21 is embedded in the assembly cavity 111 and fixedly connected to the first pin body 11 using a locking member, and the second stabilizing protrusion 24 is embedded in the stabilizing groove 41 to complete the fixed installation of the gear 4. In the utility model, the gear pin is designed as a split structure consisting of a first fixing pin 1 and a second fixing pin 2. After assembly, the first limiting convex ring 12 and the second limiting convex ring 22 are used to limit the gear 4 from both ends, and the first stabilizing protrusion 13 and the second stabilizing protrusion 24 are inserted into the corresponding stabilizing groove 41 to ensure the stability of the installation of the gear 4, avoid the problem of loosening, and the disassembly and maintenance of the gear 4 is also relatively convenient.

[0029] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, it also includes: a positioning rod 23, a plurality of positioning rods 23 are fixed to the outer wall of the second pin body 21 at equal intervals along the circumferential direction, and a positioning slot 112 for the positioning rod 23 to be embedded in the inner wall of the first pin body 11. After adopting the above scheme, the insertion position of the second pin body 21 is positioned by the provided positioning rod 23 and the positioning slot 112, and at the same time, the stability of the first pin body 11 and the second pin body 21 after connection is improved, thereby preventing the first pin body 11 and the second pin body 21 from slipping.

[0030] Optionally, by Figure 1-Figure 3 As shown, in this embodiment, the locking member is a countersunk bolt 3, which has a threaded groove 113 on the first pin body 11 and a countersunk hole 211 on the second pin body 21. The countersunk bolt 3 passes through the countersunk hole 211 and is screwed into the threaded groove 113 by threading. In this embodiment, the countersunk bolt 3 is used to fix the first pin body 11 and the second pin body 21, which is convenient for disassembly and maintenance while ensuring stable installation.

[0031] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the outer wall of the second pin body 21 abuts against the inner wall of the assembly cavity 111, further improving the stability of the connection between the first pin body 11 and the second pin body 21, and avoiding relative shaking between the first pin body 11 and the second pin body 21.

[0032] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the first stabilizing protrusion 13 and the second stabilizing protrusion 24 are equal in size and abut against the inner wall of the stabilizing groove 41, further improving the installation stability of the gear 4 and avoiding the problem of accidental loosening or rotation.

[0033] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the outer wall of the first pin body 11 abuts against the inner wall of the center hole of the gear 4, ensuring that the axis of the gear 4 coincides with the axis of the first pin body 11, effectively ensuring the installation accuracy of the gear 4.

[0034] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the first pin body 11, the first limiting protruding ring 12 and the first stabilizing protrusion 13 are an integrated structure formed by forging, and have high mechanical strength.

[0035] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the second pin body 21, the second limiting protruding ring 22, the positioning insert rod 23 and the second stabilizing protrusion 24 are an integrated structure formed by forging, and have high mechanical strength.

[0036] Components not described in detail herein are prior art.

[0037] Working principle and usage process of the present invention: When using the gear pin of the present invention, the first pin body 11 is first fixed to the output end of the turbocharger power shaft by conventional means, and then the gear 4 is sleeved on the first pin body 11, and the gear 4 is pushed to move until the gear 4 contacts the first limiting convex ring 12, and the first stabilizing protrusion 13 is embedded in the stabilizing groove 41;

[0038] Then, the second pin body 21 is inserted into the assembly cavity 111 and fixedly connected to the first pin body 11 using a locking member, and the second stabilizing protrusion 24 is inserted into the stabilizing groove 41 to complete the fixed installation of the gear 4.

[0039] In the present invention, the gear pin is designed as a split structure consisting of a first fixing pin 1 and a second fixing pin 2. After assembly, the first limiting convex ring 12 and the second limiting convex ring 22 are used to limit the gear 4 from both ends, and the first stabilizing protrusion 13 and the second stabilizing protrusion 24 are inserted into the corresponding stabilizing groove 41 to ensure the stability of the installation of the gear 4, avoid the problem of looseness, and make the disassembly and maintenance of the gear 4 more convenient.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A turbocharger power shaft gear pin, the power shaft gear pin passing through the center hole of a gear (4), used to fix the gear (4) to the output end of the turbocharger power shaft, characterized in that: The power shaft gear pin includes: A first fixing pin (1), the first fixing pin (1) comprising a first pin body (11), an assembly cavity (111) being provided in the first pin body (11), a first limiting convex ring (12) being fixed on the circumferential surface of the first pin body (11), a plurality of first stabilizing protrusions (13) being fixed on the first limiting convex ring (12) and distributed at equal intervals along the circumferential direction, and a stabilizing groove (41) for embedding the first stabilizing protrusions (13) on the end surface of the gear (4); A second fixing pin (2), the second fixing pin (2) includes a second pin body (21), the second pin body (21) is embedded in the assembly cavity (111) and is fixedly connected to the first pin body (11) using a locking member, a second limiting convex ring (22) is fixed on the circumferential surface of the second pin body (21), and a plurality of second stabilizing protrusions (24) distributed at equal intervals along the circumferential direction are fixed on the second limiting convex ring (22), and a stabilizing groove (41) for the second stabilizing protrusions (24) to be embedded is provided on the end surface of the gear (4).

2. The turbocharger power shaft gear pin according to claim 1, characterized in that: Also includes: Positioning rods (23), wherein a plurality of the positioning rods (23) are fixed to the outer wall of the second pin body (21) at equal intervals along the circumferential direction, and a positioning slot (112) for the positioning rods (23) to be embedded in the inner wall of the first pin body (11).

3. The turbocharger power shaft gear pin according to claim 1, characterized in that: The locking member is a countersunk bolt (3), having a thread groove (113) on the first pin body (11), and a countersunk hole (211) on the second pin body (21), wherein the countersunk bolt (3) passes through the countersunk hole (211) and is screwed into the thread groove (113) by screwing.

4. The turbocharger power shaft gear pin according to claim 1, characterized in that: The outer wall of the second pin body (21) abuts against the inner wall of the assembly cavity (111).

5. The turbocharger power shaft gear pin according to claim 1, characterized in that: The first stabilizing protrusion (13) and the second stabilizing protrusion (24) are of equal size and abut against the inner wall of the stabilizing groove (41).

6. The turbocharger power shaft gear pin according to claim 1, characterized in that: The outer wall of the first pin body (11) abuts against the inner wall of the center hole of the gear (4).

7. The turbocharger power shaft gear pin according to claim 1, characterized in that: The first pin body (11), the first limiting protruding ring (12) and the first stabilizing protrusion (13) are an integrated structure formed by forging.

8. The turbocharger power shaft gear pin according to claim 2, characterized in that: The second pin body (21), the second limiting protruding ring (22), the positioning insert rod (23) and the second stabilizing protrusion (24) are an integrated structure formed by forging.

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