Self-positioning spline housing for engine crankshaft

Abstract

The utility model discloses a self-positioning spline housing for an engine crankshaft, which belongs to the technical field of engine parts, and comprises a crankshaft, the output end of the crankshaft is fixedly connected with a spline shaft, the surface of the spline shaft is movably connected with a spline housing, and the spline housing is fixedly connected with a sealing ring; connecting grooves are formed in the spline shaft, the connecting grooves are symmetrically distributed about the center of the spline shaft, and a release groove is formed in the spline shaft. A sliding groove is formed in the spline sleeve, and a sliding block is slidably connected to the surface of the sliding groove. Spline grooves are formed in the spline shaft and distributed in the spline shaft at equal intervals. According to the self-positioning spline housing for the engine crankshaft, through the arrangement of the first spring and the sliding block, self-locking of the device is achieved, so that the whole power transmission system is more stable, vibration and noise caused by loosening or displacement of parts are reduced, the overall performance and working efficiency of an engine are improved, and the service life of the spline housing and the service life of a spline shaft are prolonged.

Description

Technical Field

[0001] This utility model relates to the field of engine parts technology, specifically a self-positioning spline sleeve for engine crankshafts. Background Technology

[0002] The field of engine parts technology encompasses several key aspects. The technical level and manufacturing processes of these parts directly affect the engine's performance, reliability, and durability. In the engine's power transmission system, the connection between the crankshaft and other components is crucial. As a key component connecting the crankshaft to components such as the flywheel and clutch, the performance of the spline sleeve directly impacts the engine's overall operating efficiency and stability. When connecting the spline sleeve to the crankshaft, if the spline sleeve cannot be quickly positioned, assembly workers must spend a significant amount of time manually adjusting the relative positions of the spline sleeve and crankshaft to ensure accurate spline engagement. This process is not only tedious but also requires a high degree of concentration, significantly reducing assembly speed. On large-scale production lines, the increased assembly time for each spline sleeve significantly lengthens the overall production cycle, impacting production efficiency and increasing production costs.

[0003] To overcome the aforementioned defects, existing technology (Chinese patent application number CN201720491688.7, application date 20-0-1) is used for the positioning spline sleeve of the pneumatic ground spring No. 1. The guide seat is inserted into the inner sleeve and positioned by the cooperation of the guide groove on its outer wall and the inner spline on the inner wall of the inner sleeve, which can effectively prevent the guide seat from deviating. At the same time, the inner sleeve is inserted into the outer sleeve and positioned by the cooperation of the positioning rib and the positioning groove, thereby effectively preventing the inner sleeve from rotating relative to the outer sleeve. The cooperation between the positioning groove on the outer wall of the inner sleeve and the positioning rib on the inner wall of the outer sleeve, and the cooperation between the inner spline on the inner wall of the inner sleeve and the guide groove on the outer wall of the guide seat, provide a double guarantee that the guide seat can only move axially, and at the same time, extend the service life of the pneumatic ground spring No. 1.

[0004] When the engine is running, the crankshaft is rotating at high speed and is subjected to complex and variable torque. If the spline sleeve cannot self-lock, the connection between the spline sleeve and the spline shaft may gradually loosen as the engine continues to run and the operating conditions change. This will cause relative displacement between the spline sleeve and the spline shaft, resulting in interruption or fluctuation in power transmission. As a result, the power output by the engine cannot be stably and efficiently transmitted to other components. If the above-mentioned device cannot achieve self-locking during use, the connection will become loose, and the wear on the surface of the spline teeth will be accelerated and uneven, as well as the spline will be deformed and broken, ultimately causing the spline connection to fail and shortening the service life of the device. Utility Model Content

[0005] The purpose of this utility model is to provide a self-positioning spline sleeve for engine crankshafts to solve the problems mentioned in the background art, such as the inability to achieve self-locking, resulting in loose connections, increased and uneven wear on the surface of the spline teeth, deformation and breakage of the spline, and ultimately failure of the spline connection, thus shortening the service life of the device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-positioning spline sleeve for an engine crankshaft, comprising a crankshaft, wherein a spline shaft is fixedly connected to the output end of the crankshaft, and a spline sleeve is movably connected to the surface of the spline shaft, and a sealing ring is fixedly connected to the spline sleeve; a connecting groove is provided inside the spline shaft, and the connecting grooves are symmetrically distributed about the center of the spline shaft, and a release groove is provided inside the spline shaft; a sliding groove is provided inside the spline sleeve, and a sliding block is slidably connected to the surface of the sliding groove.

[0007] Preferably, the spline shaft has spline grooves inside, and the spline grooves are evenly distributed inside the spline shaft. The spline shaft also has positioning grooves inside, and a limit post is fixedly connected to the surface of the spline shaft.

[0008] Preferably, a protrusion is fixedly connected to the inner wall of the spline sleeve, and the surface of the protrusion is in contact with the surface of the spline groove.

[0009] Preferably, the spline sleeve has a movable groove inside, and a baffle is slidably connected to the surface of the movable groove. A second spring is fixedly connected to the surface of the baffle, and the other end of the second spring is fixedly connected to the spline sleeve.

[0010] Preferably, the spline sleeve has an oil groove inside, and the oil groove is symmetrically distributed about the center of the spline sleeve.

[0011] Preferably, a fixing block is fixedly connected to the inner wall of the spline sleeve, and the surface of the fixing block is in contact with the surface of the positioning groove.

[0012] Preferably, a first spring is fixedly connected to the surface of the sliding groove, and the other end of the first spring is fixedly connected to the sliding block. A connecting rod is fixedly connected to the surface of the sliding block, and the connecting rod slides through and is slidably connected inside the spline sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the self-positioning spline sleeve for the engine crankshaft adopts a novel structural design, the specific details of which are as follows:

[0014] (1) The self-positioning spline sleeve of the engine crankshaft achieves self-locking of the device through the No. 1 spring and sliding block, making the entire power transmission system more stable, which helps to reduce vibration and noise caused by loose or displaced parts, improve the overall performance and working efficiency of the engine, and extend the service life of the spline sleeve and spline shaft.

[0015] Furthermore, it effectively prevents relative axial and circumferential displacement of the crankshaft during power transmission. This ensures the accuracy and continuity of torque transmission.

[0016] (2) The self-positioning spline sleeve of the engine crankshaft, through the set protrusions and positioning grooves, achieves rapid positioning of the device. The rapid positioning feature not only saves maintenance time, but also reduces the damage to the spline shaft and spline sleeve during installation, and improves the efficiency and quality of maintenance work.

[0017] Furthermore, it can significantly improve the engine's production efficiency while ensuring that the spline connection parts are adequately lubricated.

[0018] (3) The self-positioning spline sleeve of the engine crankshaft, through the set sealing ring and oil groove, ensures that the spline connection part is always in a good lubrication environment, maintains the oil film thickness between the spline teeth, so that the lubrication effect can be sustained and stable, ensures smooth power transmission, and reduces wear and failure caused by insufficient lubrication. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the crankshaft and spline shaft connection structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the spline sleeve and the sealing ring of this utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the spline shaft and the release groove of this utility model;

[0022] Figure 4 This is a schematic diagram of the spline shaft and spline groove connection structure of this utility model;

[0023] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0024] Figure 6 This is a schematic diagram of the connection structure between the oil groove and the spline sleeve of this utility model;

[0025] Figure 7 This utility model Figure 6 Enlarged structural diagram at point B.

[0026] In the diagram: 1. Crankshaft; 2. Splined shaft; 3. Splined sleeve; 4. Sealing ring; 5. Connecting groove; 6. Splined groove; 7. Positioning groove; 8. Release groove; 9. Oil groove; 10. Protrusion; 11. Fixing block; 12. Sliding block; 13. Sliding groove; 14. Spring No. 1; 15. Connecting rod; 16. Limiting post; 17. Baffle; 18. Spring No. 2; 19. Moving groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1: The stability of the device is improved by the addition of the spline shaft 2, sealing ring 4, and spline sleeve 3. Figures 1-2 As shown: It includes a crankshaft 1, a splined shaft 2 fixedly connected to the output end of the crankshaft 1, a splined sleeve 3 movably connected to the surface of the splined shaft 2, and a sealing ring 4 fixedly connected to the splined sleeve 3. A connecting groove 5 is opened inside the splined shaft 2, and the connecting groove 5 is symmetrically distributed about the center of the splined shaft 2. A release groove 8 is opened inside the splined shaft 2. A sliding groove 13 is opened inside the splined sleeve 3, and a sliding block 12 is slidably connected to the surface of the sliding groove 13.

[0029] When preparing to install the spline sleeve 3 onto the spline shaft 2 of the engine crankshaft 1, the spline sleeve 3 is horizontally inserted into the surface of the spline shaft 2. At the same time, the protrusion 10 on the surface of the spline sleeve 3 fits against the surface of the spline groove 6 inside the spline shaft 2, thereby achieving the connection between the spline sleeve 3 and the spline shaft 2. This ensures the stable connection between the spline sleeve 3 and the spline shaft 2 during power transmission of the crankshaft 1, improving the stability of the device's operation. It also ensures that the spline sleeve 3 and the spline shaft 2 always maintain the correct axial positional relationship, avoiding the impact on power transmission efficiency or damage to components due to axial displacement. Furthermore, the sealing ring 4 effectively reduces the risk of fatigue cracks or damage at the connection point, improving the structural stability of the spline shaft 2, thereby enhancing the stability and reliability of the entire device and extending its service life.

[0030] In embodiment two, unlike embodiment one, the spline sleeve 3 and spline shaft 2 are quickly positioned using the protrusion 10, positioning groove 7, and oil groove 9. Figures 3-5 As shown: a splined shaft 2 has a splined groove 6 inside, and the splined groove 6 is evenly distributed inside the splined shaft 2. A positioning groove 7 is also provided inside the splined shaft 2. A limit post 16 is fixedly connected to the surface of the splined shaft 2. A protrusion 10 is fixedly connected to the inner wall of the splined sleeve 3, and the surface of the protrusion 10 is in contact with the surface of the splined groove 6. A moving groove 19 is provided inside the splined sleeve 3, and a baffle 17 is slidably connected to the surface of the moving groove 19. A second spring 18 is fixedly connected to the surface of the baffle 17. The other end of the second spring 18 is fixedly connected to the splined sleeve 3. An oil groove 9 is provided inside the splined sleeve 3, and the oil groove 9 is symmetrically distributed about the center of the splined sleeve 3.

[0031] When the spline sleeve 3 is connected to the spline shaft 2, the evenly distributed protrusions 10 on the surface of the spline sleeve 3 contact the positioning grooves 7 on the surface of the spline shaft 2, causing the protrusions 10 to slide on the surface of the positioning grooves 7. As the protrusions 10 slide on the surface of the positioning grooves 7, the spline sleeve 3 and the spline shaft 2 are connected. At the same time, the limiting post 16 on the surface of the spline shaft 2 fits against the baffle 17 inside the spline sleeve 3, causing the second spring 18 to retract towards the inner wall of the spline sleeve 3, thereby achieving rapid positioning of the spline sleeve 3 and the spline shaft 2. This greatly improves the positioning speed and accuracy when the spline sleeve 3 and the spline shaft 2 are connected. Furthermore, the lubricating oil enters the oil groove 9 through the oil supply system, reducing friction and wear between the spline sleeve 3 and the spline shaft 2, reducing the heat generated by friction, and improving the service life and power transmission efficiency of the spline connection. In addition, the lubricating oil can also carry away some heat during the flow process, playing a heat dissipation role and preventing the material properties of the spline connection from deteriorating due to excessive temperature, thus improving the reliability of the device.

[0032] In embodiment three, unlike embodiment two, the self-locking of the device is achieved through the arrangement of spring 14, sliding groove 13, and sliding block 12, as shown below. Figures 6-7 As shown: A fixing block 11 is fixedly connected to the inner wall of the spline sleeve 3, and the surface of the fixing block 11 is in contact with the surface of the positioning groove 7. A first spring 14 is fixedly connected to the surface of the sliding groove 13, and a sliding block 12 is fixedly connected to the other end of the first spring 14. A connecting rod 15 is fixedly connected to the surface of the sliding block 12, and the connecting rod 15 slides through and is connected inside the spline sleeve 3.

[0033] When the spline sleeve 3 is connected to the spline shaft 2, the sliding block 12 inside the spline sleeve 3 slides on the surface of the sliding groove 13, causing the first spring 14 to retract towards the spline sleeve 3, and the sliding block 12 slides on the surface of the spline shaft 2. When the sliding block 12 contacts the connecting groove 5 on the surface of the spline shaft 2, the first spring 14 pushes the sliding block 12 to engage with the connecting groove 5, thereby achieving self-locking of the device. When separating the spline sleeve 3 from the spline shaft 2, the connecting rod 15 is clamped with a tool, causing the sliding block 12 to slide towards the surface of the connecting groove 5, thereby separating the spline sleeve 3 from the spline shaft 2. This makes the entire power transmission system more stable, helps to reduce vibration and noise caused by loose or displaced components, improves the overall performance and working efficiency of the engine, and extends the service life of the spline sleeve 3 and the spline shaft 2.

[0034] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-positioning spline sleeve for an engine crankshaft, comprising a crankshaft (1), wherein a spline shaft (2) is fixedly connected to the output end of the crankshaft (1), and a spline sleeve (3) is movably connected to the surface of the spline shaft (2), and a sealing ring (4) is fixedly connected to the spline sleeve (3). Its features are: The spline shaft (2) has a connecting groove (5) inside, and the connecting groove (5) is symmetrically distributed about the center of the spline shaft (2). The spline shaft (2) also has a release groove (8) inside. The spline sleeve (3) has a sliding groove (13) inside, and a sliding block (12) is slidably connected to the surface of the sliding groove (13).

2. The self-positioning spline sleeve for an engine crankshaft according to claim 1, characterized in that: The spline shaft (2) has a spline groove (6) inside, and the spline groove (6) is evenly distributed inside the spline shaft (2). The spline shaft (2) also has a positioning groove (7) inside, and a limit post (16) is fixedly connected to the surface of the spline shaft (2).

3. The self-positioning spline sleeve for an engine crankshaft according to claim 2, characterized in that: The inner wall of the spline sleeve (3) is fixedly connected with a protrusion (10), and the surface of the protrusion (10) is in contact with the surface of the spline groove (6).

4. The self-positioning spline sleeve for an engine crankshaft according to claim 3, characterized in that: The spline sleeve (3) has a movable groove (19) inside, and a baffle (17) is slidably connected to the surface of the movable groove (19), and a second spring (18) is fixedly connected to the surface of the baffle (17), while the other end of the second spring (18) is fixedly connected to the spline sleeve (3).

5. A self-positioning spline sleeve for an engine crankshaft according to claim 4, characterized in that: The spline sleeve (3) has an oil groove (9) inside, and the oil groove (9) is symmetrically distributed about the center of the spline sleeve (3).

6. The self-positioning spline sleeve for an engine crankshaft according to claim 5, characterized in that: The inner wall of the spline sleeve (3) is fixedly connected to a fixing block (11), and the surface of the fixing block (11) is in contact with the surface of the positioning groove (7).

7. The self-positioning spline sleeve for an engine crankshaft according to claim 1, characterized in that: A first spring (14) is fixedly connected to the surface of the sliding groove (13), and the other end of the first spring (14) is fixedly connected to the sliding block (12). A connecting rod (15) is fixedly connected to the surface of the sliding block (12), and the connecting rod (15) slides through and is connected inside the spline sleeve (3).

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