Positioning sleeve for press fitting of crankshaft gear of gasoline engine

Abstract

The utility model relates to the field of gasoline engine crankshaft gear press-fitting dies, in particular to a positioning sleeve for gasoline engine crankshaft gear press-fitting, a main body comprises a gear positioning part and a connecting rod neck positioning part which are mounted on a plate body, the gear positioning part is used for positioning a gear press-fitted on a main journal, and the connecting rod neck positioning part is used for fixing the relative position of the main body and a crankshaft; gear positioning blocks are slidably mounted on the gear positioning part, the gear positioning blocks are distributed in the length direction of the crankshaft, and the gear positioning part further comprises a plurality of V-shaped positioning clamps distributed in the length direction of a main journal of the crankshaft; the connecting rod neck positioning part comprises a fixing plate installed at the end of the plate body, a locking mechanism used for abutting against the connecting rod neck is installed on the fixing plate, a clamping plate in the locking mechanism abuts against the connecting rod neck, the back face of the clamping plate drives the clamping plate to clamp the connecting rod neck from the two sides through a synchronous driving mechanism, and an angle adjusting plate is installed on the surface of the clamping plate. The universality of the positioning sleeve is improved, the process is simplified, and the positioning precision of crankshaft gear press fitting is improved.

Description

Technical Field

[0001] This application relates to the field of press-fit molds for gasoline engine crankshaft gears, and in particular to a positioning sleeve for press-fitting gasoline engine crankshaft gears. Background Technology

[0002] A balance gear and a timing gear are installed on the crankshaft of a gasoline engine. The two gears overlap on the crankshaft and have angular requirements relative to the crankshaft. During the press-fitting process of the crankshaft gears, the gears are generally pressed onto the crankshaft through a heat-fitting process. During the heat-fitting process, the gears are in an expanded state and have a clearance fit with the crankshaft. After the gears cool down, they are in a contracted state and have an interference fit with the crankshaft. During the expansion and contraction process, the gears will shift and produce a positional deviation between them and the crankshaft, thus affecting the assembly accuracy of the gears and the crankshaft. Utility Model Content

[0003] In order to overcome the problems in the prior art, this application provides a positioning sleeve for press-fitting crankshaft gears of gasoline engines.

[0004] The positioning sleeve for press-fitting gasoline engine crankshaft gears provided in this application adopts the following technical solution:

[0005] A positioning sleeve for press-fitting crankshaft gears in a gasoline engine includes a main body. The main body includes a gear positioning part and a connecting rod journal positioning part mounted on a plate. The gear positioning part is used to position the gear press-fitted on the main journal, and the connecting rod journal positioning part is used to fix the relative position of the main body and the crankshaft. The gear positioning part includes gear positioning blocks slidably mounted on it, and the gear positioning blocks are distributed along the length direction of the crankshaft. The gear positioning part also includes a plurality of V-shaped positioning clamps distributed along the length direction of the crankshaft main journal. The connecting rod journal positioning part includes a fixing plate mounted on the end of the plate. A locking mechanism for abutting against the connecting rod journal is mounted on the fixing plate. A clamping plate in the locking mechanism abuts against the connecting rod journal. The back of the clamping plate is driven by a synchronous drive mechanism to clamp the connecting rod journal from both sides. An angle adjustment plate is mounted on the surface of the clamping plate.

[0006] By adopting the above technical solution, the angle adjustment plate can be finely adjusted according to the connecting rod journal angle of different crankshaft models, ensuring the accuracy and stability of clamping. This design allows the positioning sleeve to adapt to various crankshaft specifications, greatly improving its versatility and practicality. During the press-fitting process, the operator only needs to install the main body on the crankshaft, use the gear positioning block and V-shaped positioning clamp to accurately position the gear, and then control the clamping plate to clamp the connecting rod journal through the synchronous drive mechanism to quickly complete the positioning work. The entire operation process is simple and efficient, effectively shortening the press-fitting process time and improving production efficiency.

[0007] Preferably, the plate body is provided with a groove along the length of the crankshaft, the slider on the top of the gear positioning block is slidably installed in the groove, and the gear positioning block is provided with two sets of sliders connected to each other.

[0008] Preferably, a lifting cylinder is fixed to the top of the slider, and a through hole is provided on the slider. The output shaft of the lifting cylinder passes through the through hole of the slider and is connected to the gear positioning block.

[0009] Preferably, the slide groove is a strip-shaped groove that runs through the plate, and the slider inside the slide groove adopts an I-shaped structure with upper and lower splits.

[0010] Preferably, an arc-shaped bracket is installed at the connection between the top of the V-shaped positioning clamp and the main body, allowing the slider and gear positioning block to pass through.

[0011] By adopting the above technical solution, the gear positioning block can be flexibly and precisely adjusted in height under the drive of the lifting cylinder to accommodate gears of different sizes. The upper and lower split I-shaped slider slides stably within the slide groove, facilitating assembly within the groove and ensuring smooth movement and structural stability. The arc-shaped bracket on the V-shaped positioning clamp provides a convenient channel for the movement of the slider and gear positioning block, facilitating the positioning of gears distributed in the middle and on both sides of the V-shaped positioning frame.

[0012] Preferably, the synchronous drive mechanism includes a U-shaped adjusting rod that passes through the fixed plate, wherein one end of the U-shaped adjusting rod is slidably installed inside the fixed plate and a clamping plate is installed at the end, and the other end is horizontally distributed above the fixed plate. A rack is provided on the opposite surface of the two U-shaped adjusting rods, and an adjusting gear is installed between the racks. The adjusting gear is rotatably installed on the connecting plate between the fixed plates via a rotating shaft.

[0013] By adopting the above technical solution, when clamping the connecting rod neck during the installation of the positioning sleeve, it is only necessary to rotate the adjusting gear. The adjusting gear meshes with the racks on the two U-shaped adjusting rods, causing the U-shaped adjusting rods to move synchronously in opposite directions. Since one end of the U-shaped adjusting rod is connected to the clamping plate, the two clamping plates can synchronously and stably move closer to or further away from the connecting rod neck, achieving precise clamping of connecting rod necks of different sizes.

[0014] Preferably, the angle adjustment plate includes two sets of movable plates rotatably mounted on the surface of the clamping plate, wherein the movable plates are symmetrically distributed and rotatably mounted on the rotating platform of the clamping plate, and the rotation axis in the rotating platform is horizontal to the axis of the crankshaft.

[0015] By adopting the above technical solution, when the operator operates the synchronous drive mechanism to clamp the connecting rod neck with the clamping plate, the angle adjustment plate on the clamping plate can be flexibly adjusted through the rotation axis of the turntable. The symmetrically distributed movable plates can accurately adapt to the surface of various crankshaft connecting rod necks, ensuring that they can fit tightly with the connecting rod neck during clamping and provide stable and reliable support. Moreover, this design greatly enhances the versatility of the positioning sleeve, reduces the cumbersome process of changing different positioning devices due to different crankshaft models, and effectively reduces production costs.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The positioning sleeve in this application can adapt to crankshafts of various specifications, greatly improving its versatility and practicality. The entire operation process is simple and efficient, effectively shortening the pressing process time and improving production efficiency.

[0018] 2. The positioning sleeve in this application is fast and accurate in the positioning process, which greatly improves the working efficiency and assembly accuracy of gasoline engine crankshaft gear press assembly, effectively reduces the assembly error caused by inaccurate positioning, provides a solid guarantee for high-quality engine production, and lays a good foundation for subsequent large-scale production and efficient operation of equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection structure between a positioning sleeve for press-fitting a gasoline engine crankshaft gear and the crankshaft.

[0020] Figure 2 yes Figure 1 Schematic diagram of the structure on the left side;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 yes Figure 1 Schematic diagram of the structure on the right side of the middle section.

[0023] Explanation of reference numerals in the attached drawings: 1. Main body; 11. Plate; 111. Slide groove; 2. Gear positioning part; 21. Gear positioning block; 22. V-shaped positioning clamp; 221. Arc-shaped bracket; 23. Slider; 24. Lifting cylinder; 3. Connecting rod neck positioning part; 31. Fixed plate; 311. Connecting plate; 32. Locking mechanism; 321. Clamping plate; 3211. Angle adjustment plate; 3212. Movable plate; 3213. Rotating table; 322. Synchronous drive mechanism; 3221. U-shaped adjusting rod; 3222. Rack; 3223. Adjusting gear; 3224. Rotating shaft; 4. Gear; 5. Crankshaft. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0025] This application discloses a positioning sleeve for press-fitting crankshaft gears in a gasoline engine.

[0026] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A positioning sleeve for pressing a crankshaft gear in a gasoline engine includes a main body 1. The main body 1 includes a gear positioning part 2 and a connecting rod journal positioning part 3 mounted on a plate 11. The gear positioning part 2 is used to position a gear 4 pressed onto a main journal, and the connecting rod journal positioning part 3 is used to fix the relative position of the main body 1 and the crankshaft 5. The gear positioning part 2 has a gear positioning block 21 slidably mounted on it, and the gear positioning block 21 is distributed along the length direction of the crankshaft 5. The gear positioning part 2 also includes a plurality of V-shaped positioning clamps 22 distributed along the length direction of the main journal of the crankshaft 5. The connecting rod journal positioning part 3 includes a fixing plate 31 mounted on the end of the plate 11. A locking mechanism 32 for abutting against the connecting rod journal is mounted on the fixing plate 31. The clamping plate 321 in the locking mechanism 32 abuts against the connecting rod journal. The back of the clamping plate 321 is driven by a synchronous drive mechanism 322 to clamp the connecting rod journal from both sides. An angle adjustment plate 3211 is mounted on the surface of the clamping plate 321. The angle adjustment plate 3211 can be finely adjusted according to the connecting rod journal angle of different crankshaft models 5, ensuring the accuracy and stability of clamping. This design allows the positioning sleeve to adapt to various specifications of crankshaft 5, greatly improving its versatility and practicality. During the press-fitting process, the operator only needs to install the main body 1 on the crankshaft 5, use the gear positioning block 21 and V-shaped positioning clamp 22 to accurately position the gear 4, and then control the clamping plate 321 to clamp the connecting rod journal through the synchronous drive mechanism 322, thus quickly completing the positioning work. The entire operation process is simple and efficient, effectively shortening the press-fitting process time and improving production efficiency.

[0027] Reference Figure 1 and Figure 4The plate 11 has a groove 111 along the length of the crankshaft 5. The slider 23 on the top of the gear positioning block 21 is slidably installed in the groove 111, and the gear positioning block 21 has two sets of sliders 23 connected to each other. A lifting cylinder 24 is fixed on the top of the slider 23. A through hole is opened on the slider 23, and the output shaft of the lifting cylinder 24 passes through the through hole of the slider 23 and is connected to the gear positioning block 21. The groove 111 is a strip-shaped groove that passes through the plate 11, and the slider 23 in the groove 111 adopts an I-shaped structure with upper and lower split parts. An arc-shaped bracket 221 that allows the slider 23 and the gear positioning block 21 to pass through is installed at the connection between the top of the V-shaped positioning clamp 22 and the main body 1. This allows the gear positioning block 21 to flexibly and accurately adjust its height under the drive of the lifting cylinder 24 to accommodate gears 4 of different sizes. The split-type I-shaped slider 23 slides stably within the slide groove 111, facilitating assembly within the groove and ensuring smooth movement and structural stability. The arc-shaped bracket 221 on the V-shaped positioning clamp 22 provides a convenient channel for the movement of the slider 23 and the gear positioning block 21, allowing the gear positioning block 21 to position the gears 4 distributed in the middle and on both sides of the V-shaped positioning frame.

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 The synchronous drive mechanism 322 includes a U-shaped adjusting rod 3221 that passes through the fixed plate 31. One end of the U-shaped adjusting rod 3221 is slidably installed inside the fixed plate 31 and a clamping plate 321 is installed at the end. The other end is horizontally distributed above the fixed plate 31. Racks 3222 are provided on the opposite surfaces of the two U-shaped adjusting rods 3221. An adjusting gear 3223 is installed between the racks 3222. The adjusting gear 3223 is rotatably installed on the connecting plate 311 between the fixed plates 31 via a rotating shaft 3224. When the positioning sleeve is installed and the connecting rod neck is clamped, only the adjusting gear 3223 needs to be rotated. The adjusting gear 3223 meshes with the racks 3222 on the two U-shaped adjusting rods 3221, driving the U-shaped adjusting rods 3221 to move synchronously in opposite directions. Since one end of the U-shaped adjusting rod 3221 is connected to the clamping plate 321, the two clamping plates 321 can move closer to or further away from the connecting rod neck synchronously and stably, thus achieving precise clamping of connecting rod necks of different sizes.

[0029] Reference Figure 1 , Figure 2 and Figure 3The angle adjustment plate 3211 includes two sets of movable plates 3212 rotatably mounted on the surface of the clamping plate 321. The movable plates 3212 are symmetrically distributed and rotatably mounted on the rotating platform 3213 of the clamping plate 321, and the rotation axis in the rotating platform 3213 is horizontal with the axis of the crankshaft 5. When the operator operates the synchronous drive mechanism 322 to clamp the connecting rod neck with the clamping plate 321, the angle adjustment plate 3211 on the clamping plate 321 can flexibly adjust the angle through the rotation axis of the rotating platform 3213. The symmetrically distributed movable plates 3212 can accurately adapt to the surface of various crankshaft 5 connecting rod necks, ensuring that they can fit tightly with the connecting rod neck during clamping, providing stable and reliable support. Moreover, this design greatly enhances the versatility of the positioning sleeve, reduces the cumbersome process of changing different positioning devices due to different crankshaft 5 models, and effectively reduces production costs.

[0030] Working principle: The operator installs the positioning sleeve body 1 on the crankshaft 5, uses the V-shaped positioning clamp 22 to position the gear 4, then controls the clamping plate 321 to clamp the connecting rod neck through the synchronous drive mechanism 322, and finally uses the gear positioning block 21 to radially position the gear 4 to prevent the gear 4 from rotating during the pressing process and eliminate the positional deviation between the gear 4 and the crankshaft 5.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning sleeve for press-fitting crankshaft gears in a gasoline engine, characterized in that: The main body (1) includes a gear positioning part (2) and a connecting rod journal positioning part (3) mounted on a plate (11). The gear positioning part (2) is used to position the gear (4) pressed on the main journal, and the connecting rod journal positioning part (3) is used to fix the relative position of the main body (1) and the crankshaft (5). Gear positioning part (2), gear positioning block (21) is slidably mounted on the gear positioning part (2), and the gear positioning block (21) is distributed along the length direction of the crankshaft (5). The gear positioning part (2) also includes a plurality of V-shaped positioning clamps (22) distributed along the length direction of the main journal of the crankshaft (5); connecting rod journal positioning part (3), the connecting rod journal positioning part (3) includes a fixing plate (31) installed at the end of the plate body (11). A locking mechanism (32) for abutting against the connecting rod journal is installed on the fixing plate (31). The clamping plate (321) in the locking mechanism (32) abuts against the connecting rod journal. The back of the clamping plate (321) is driven by the synchronous drive mechanism (322) to clamp the connecting rod journal from both sides. An angle adjustment plate (3211) is installed on the surface of the clamping plate (321).

2. The positioning sleeve for press-fitting a gasoline engine crankshaft gear according to claim 1, characterized in that: The plate (11) is provided with a groove (111) along the length of the crankshaft (5). The slider (23) on the top of the gear positioning block (21) is slidably installed in the groove (111), and the gear positioning block (21) is provided with two sets of sliders (23) respectively connected to individual sliders.

3. A positioning sleeve for press-fitting a gasoline engine crankshaft gear according to claim 2, characterized in that: A lifting cylinder (24) is fixed to the top of the slider (23). A through hole is provided on the slider (23). The output shaft of the lifting cylinder (24) passes through the through hole of the slider (23) and is connected to the gear positioning block (21).

4. A positioning sleeve for press-fitting a gasoline engine crankshaft gear according to claim 2, characterized in that: The groove (111) is a strip-shaped groove that penetrates the plate (11), and the slider (23) inside the groove (111) adopts an I-shaped structure with upper and lower splits.

5. A positioning sleeve for press-fitting a gasoline engine crankshaft gear according to claim 2, characterized in that: The V-shaped positioning clamp (22) is connected to the main body (1) at the top, and an arc-shaped bracket (221) is installed to allow the slider (23) and gear positioning block (21) to pass through.

6. A positioning sleeve for press-fitting a gasoline engine crankshaft gear according to claim 1, characterized in that: The synchronous drive mechanism (322) includes a U-shaped adjusting rod (3221) that passes through the fixed plate (31). One end of the U-shaped adjusting rod (3221) is slidably installed in the fixed plate (31) and a clamping plate (321) is installed at the end. The other end is horizontally distributed above the fixed plate (31). A rack (3222) is provided on the opposite surface of the two U-shaped adjusting rods (3221). An adjusting gear (3223) is installed between the racks (3222). The adjusting gear (3223) is rotatably installed on the connecting plate (311) between the fixed plates (31) via a rotating shaft (3224).

7. A positioning sleeve for press-fitting a gasoline engine crankshaft gear according to claim 1, characterized in that: The angle adjustment plate (3211) includes two sets of movable plates (3212) rotatably mounted on the surface of the clamping plate (321). The movable plates (3212) are symmetrically distributed and rotatably mounted on the rotating platform (3213) of the clamping plate (321), and the rotation axis in the rotating platform (3213) is horizontal to the axis of the crankshaft (5).

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