Gear press fitting tool

Abstract

The utility model provides a gear press fitting tool which is arranged at the upper end and the lower end of a gear set and comprises a first pressing block and a second pressing block, the first pressing block is arranged at the upper end of the gear set, the second pressing block is arranged at the lower end of the gear set, and the gear set comprises a first gear, a second gear and a third gear which are arranged from top to bottom. The second gear comprises a gear tooth part in the middle and a shaft sleeve part axially extending from the gear tooth part to the two sides, a first positioning boss used for being arranged in the shaft sleeve part in a penetrating mode is arranged in the middle of the first pressing block, the first pressing block is provided with a first annular boss around the first positioning boss, and a first annular groove is formed between the first annular boss and the first positioning boss; the width of the first annular groove is greater than the thickness of the shaft sleeve part; the second pressing block and the first pressing block are the same in structure. The gear press-fitting device is arranged on the end face of the gear set, the first gear and the third gear are pressed on the two sides of the gear tooth portion of the second gear through a press machine, it is guaranteed that the gears are tightly attached, and batch press-fitting of the gear set is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gear processing, in particular to a gear press-fitting tool. Background Art

[0002] Gearbox components often require specialized gear sets composed of multiple gears stacked together, typically by pressing them together. However, during mass production, the initial press-fitting process is cumbersome, and after the press is complete, it's difficult to ensure both gears are properly seated.

[0003] Therefore, it is necessary to provide a gear press fitting to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of the utility model is to provide a gear press-fitting tool.

[0005] According to one aspect of the present invention, a gear press-fitting tool is provided, which is arranged at the upper and lower ends of a gear set and cooperates with a press to press the gear set together. The tool comprises a first pressing block and a second pressing block, wherein the first pressing block is arranged at the upper end of the gear set and the second pressing block is arranged at the lower end of the gear set.

[0006] The gear set includes a first gear, a second gear, and a third gear arranged from top to bottom, the second gear includes a gear tooth portion in the middle and a shaft sleeve portion extending axially from the gear tooth portion to both sides, and the first gear and the second gear are respectively sleeved on the upper end and the lower end of the shaft sleeve portion;

[0007] A first positioning boss for passing through the shaft sleeve is provided in the middle of the first pressing block, a first annular boss is provided around the first positioning boss, a first annular groove is provided between the first annular boss and the first positioning boss, and the width of the first annular groove is greater than the thickness of the shaft sleeve;

[0008] The second pressing block has the same structure as the first pressing block.

[0009] Preferably, the first positioning boss is cylindrical, and a guide slope is provided on the peripheral side of the bottom end of the first positioning boss.

[0010] Preferably, the inner and outer circumferences of the bottom end of the first annular boss are both provided with guiding inclined surfaces.

[0011] Preferably, the inner ring of the sleeve portion is provided with a spline, and the sleeve portion includes a first sleeve portion extending upward from the gear tooth portion and a second sleeve portion extending downward from the gear tooth portion, the first gear is sleeved on the first sleeve portion, the first pressure block is arranged at the top end of the first sleeve portion, and the first positioning boss is passed through the first sleeve portion, and the first annular boss is supported on the first gear.

[0012] Preferably, the third gear is sleeved on the second sleeve portion, and the second pressing block is arranged at the bottom end of the second sleeve portion, and the supporting method is the same as that of the first pressing block.

[0013] Preferably, the upper surface of the first pressing block and the lower surface of the second pressing block are both planes.

[0014] Preferably, a guiding bevel is provided on the bottom of the inner ring of the first gear, and a guiding bevel is provided on the top of the inner ring of the second gear.

[0015] Compared with the prior art, the gear press fitting provided by the present invention has the following beneficial effects:

[0016] Due to the adoption of the above technical solution, the utility model has the advantages of simple structure, ingenious design and low cost. After the gears on both sides are preliminarily pressed together, the tooling is used to stick to the end faces of the gear set, and the first gear and the third gear are pressed tightly on both sides of the gear tooth part of the second gear using a press to ensure that the gears are tightly fitted, thereby realizing batch press-fitting of the gear set. The tooling is simple and easy to make, and is convenient and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 This is a front view of the gear press-fitting tool of the present invention;

[0019] Figure 2 for Figure 2 The cross-sectional view of the AA surface;

[0020] Figure 3 This is an exploded view of the gear press-fitting tooling of the present invention;

[0021] Figure 4 A three-dimensional diagram of the first pressing block of the present invention;

[0022] Figure 5 This is a working state diagram of the gear press fitting of the present invention.

[0023] Among them, 1. press, 11. working platform, 2. gear set, 21. first gear, 22. second gear, 221. gear tooth portion, 222. sleeve portion, 2221. first sleeve portion, 2222. second sleeve portion, 223. spline, 23. third gear, 3. first pressure block, 31. first positioning boss, 32. first annular boss, 33. first annular groove, 4. second pressure block, 41. second positioning boss, 42. second annular boss, 43. second annular groove, 5. guide slope. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0026] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0027] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0030] See also Figure 1 and Figure 5 This embodiment discloses a gear press-fitting tool, which is installed at the upper and lower ends of a gear set 2 and cooperates with a press 1 to press the gear set 2 together. The gear press-fitting tool includes a first pressing block 3 and a second pressing block 4 of identical structure. The first pressing block 3 is installed at the upper end of the gear set 2, and the second pressing block 4 is installed at the lower end of the gear set 2.

[0031] See also Figure 2 and Figure 3 The gear set 2 includes a first gear 21, a second gear 22, and a third gear 23, arranged from top to bottom. The second gear 22 includes a central gear tooth portion 221 and a sleeve portion 222 extending axially from the gear tooth portion 221. The inner ring of the sleeve portion 222 is provided with a spline 223. The sleeve portion 222 includes a first sleeve portion 2221 extending upward from the gear tooth portion 221 and a second sleeve portion 2222 extending downward from the gear tooth portion 221. The first gear 21 is sleeved on the first sleeve portion 2221, and the third gear 23 is sleeved on the second sleeve portion 2222.

[0032] See also Figure 4 , the first pressure block 3 is arranged at the end of the first shaft sleeve part 2221, and a first positioning boss 31 for passing through the first shaft sleeve part 2221 is provided in the middle of the first pressure block 3. A first annular boss 32 is provided around the first positioning boss 31 on the first pressure block 3, and the first annular boss 32 is supported on the first gear 21. A first annular groove 33 is provided between the first annular boss 32 and the first positioning boss 31, and the width of the first annular groove 33 is greater than the thickness of the first shaft sleeve part 2221. The first positioning boss 31 is arranged in a cylindrical shape, and a guide bevel 5 is provided on the circumference of the bottom end of the first positioning boss 31. Guide bevels 5 are provided on the inner and outer circumferences of the bottom end of the first annular boss 31. The setting of the guide bevel 5 can prevent the positioning tooling from causing bumps and damage to the gear.

[0033] See also Figure 2 The second pressure block 4 is arranged at the end of the second shaft sleeve portion 2222, and a second positioning boss 41 for passing through the second shaft sleeve portion 2222 is provided in the middle of the second pressure block 4. A second annular boss 42 is provided on the second pressure block 4 around the second positioning boss 41, and the second annular boss 42 is supported on the bottom of the third gear 23. A second annular groove 43 is provided between the second annular boss 42 and the second positioning boss 41, and the width of the second annular groove 43 is greater than the thickness of the second shaft sleeve portion 2222. The second positioning boss 41 is arranged in a cylindrical shape, and a guide bevel 5 is provided on the circumferential side of the bottom end of the second positioning boss 41. Guide bevels 5 are provided on the inner and outer circumferential sides of the bottom end of the second annular boss 42.

[0034] See also Figure 5 The upper surface of the first pressing block 3 and the lower surface of the second pressing block 4 are both flat and are used for placement on the work platform 11 of the press 1 for pressing. The bottom of the inner ring of the first gear 21 is provided with a guide slope 5, and the top of the inner ring of the third gear 23 is provided with a guide slope 5 to facilitate the gears to be placed on the shaft sleeve portion 222 for pressing.

[0035] Working process: First, place the third gear 23 on the working platform 11 of the press 1, then place the second sleeve portion 2222 of the second gear 22 on the third gear 23, and then place the first gear 21 on the first sleeve portion 2221. Use the press 1 to preliminarily press the three gears together to form the gear set 2. At this time, the first gear 21 and the third gear 23 are not yet completely in contact with the gear teeth 221 of the second gear 22. Then place the second pressing block 4 on the working platform 11, place the gear set 2 on the second pressing block 4 (at this time, the second sleeve portion 2222 is sleeved on the second positioning boss 41), and place the first pressing block 3 on the top of the gear set 2 (at this time, the first positioning boss 31 is inserted into the first sleeve portion 2221). Then use the press 1 to press together, so that the three gears are pressed tightly to ensure a tight fit between the gears. After that, remove the flanges and perform the electron beam welding process. The rapid connection between the various processes brings great benefits.

[0036] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments described above without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalents.

Claims

1. A gear press fitting, which is installed at the upper and lower ends of a gear set and cooperates with a press to press the gear set, characterized in that: It includes a first pressing block and a second pressing block, wherein the first pressing block is arranged at the upper end of the gear set, and the second pressing block is arranged at the lower end of the gear set; The gear set includes a first gear, a second gear, and a third gear arranged from top to bottom, the second gear includes a gear tooth portion in the middle and a shaft sleeve portion extending axially from the gear tooth portion to both sides, and the first gear and the second gear are respectively sleeved on the upper end and the lower end of the shaft sleeve portion; A first positioning boss for passing through the shaft sleeve is provided in the middle of the first pressing block, a first annular boss is provided around the first positioning boss, a first annular groove is provided between the first annular boss and the first positioning boss, and the width of the first annular groove is greater than the thickness of the shaft sleeve; The second pressing block has the same structure as the first pressing block.

2. The gear press fitting according to claim 1, wherein: The first positioning boss is cylindrical, and a guide slope is provided on the peripheral side of the bottom end of the first positioning boss.

3. The gear press fitting according to claim 2, wherein: The inner circumference and the outer circumference of the bottom end of the first annular boss are both provided with guiding inclined surfaces.

4. The gear press fitting according to claim 3, wherein: The inner ring of the sleeve portion is provided with a spline, and the sleeve portion includes a first sleeve portion extending upward from the gear tooth portion and a second sleeve portion extending downward from the gear tooth portion, the first gear is sleeved on the first sleeve portion, the first pressure block is arranged on the top end of the first sleeve portion, and the first positioning boss is passed through the first sleeve portion, and the first annular boss is supported on the first gear.

5. The gear press fitting according to claim 4, wherein: The third gear is sleeved on the second shaft sleeve portion, and the second pressing block is arranged at the bottom end of the second shaft sleeve portion, and the supporting method is the same as that of the first pressing block.

6. The gear press fitting according to claim 5, wherein: The upper surface of the first pressing block and the lower surface of the second pressing block are both planes.

7. The gear press fitting according to claim 6, wherein: A guiding bevel is provided on the bottom of the inner ring of the first gear, and a guiding bevel is provided on the top of the inner ring of the second gear.

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