Flexible positioned starter end cover

Abstract

This utility model discloses a flexible positioning starter end cover, including a starter end cover with an integral flange. The flange has a connecting component for fixing to the engine. The connecting component includes: a support block; the flange has a through cavity I; the inner wall of cavity I has an integral stepped layer; a cavity II coaxially arranged with cavity I is opened inside the stepped layer; the support block is located inside cavity I; and an end cover is fixed to the outside of the flange to cover cavity I. The two ends of the support block abut against the stepped layer and the end cover, respectively. Compared with the prior art, the advantage of this utility model is that the reserved gap between the threaded shaft and the end cover, cavity I, and cavity II allows for slight offset of the threaded shaft during assembly, compensating for the tolerance of the engine mounting hole and the starter end cover hole, and avoiding stress concentration caused by forced assembly.

Description

Technical Field

[0001] This utility model relates to the field of starter technology, and in particular to a flexible positioning starter end cover. Background Technology

[0002] In the assembly of a car starter and engine, if there are significant tolerance deviations in the locating pin holes or mounting surfaces, and the tolerances exceed the design allowable range, forcibly tightening them with bolts will generate harmful residual stress and stress concentration.

[0003] If the starter motor and the mounting holes on the engine are not perfectly aligned, forcibly tightening the bolts will subject them to bending stress. This stress significantly increases the risk of bolt fatigue fracture. If the bolts break, the starter motor may detach, or worse, other components may be damaged or safety hazards may arise. Furthermore, the force of forced tightening acts not only on the bolts but also on the starter motor housing, potentially causing localized plastic deformation or internal cracks. Under prolonged vibration and stress, the risk of starter motor housing breakage or engine mounting bracket damage increases significantly.

[0004] The starter motor starts the engine by meshing its pinion with the flywheel ring gear. Forcibly tightening the pinion can cause deformation or angular displacement, which will change the parallelism and center distance between the center line of the pinion and the center line of the flywheel, and can easily lead to abnormal wear. Utility Model Content

[0005] In view of the problems mentioned above, the technical problem to be solved by this utility model is to provide a starter end cover with flexible positioning.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a flexible positioning starter end cover, including a starter end cover, a flange integrally formed on the starter end cover, a connecting component on the flange, the connecting component being used to fix it to the engine, the connecting component including:

[0007] The support block has a through cavity one on the flange. The inner wall of cavity one has an integral stepped layer. A cavity two is opened inside the stepped layer and is coaxially arranged with the cavity one. The support block is located inside cavity one.

[0008] The end cap is fixed to the outside of the flange and is used to cover the cavity. The two ends of the support block abut against the step layer and the end cap, respectively.

[0009] The threaded shaft passes through the end cap, support block, cavity one and cavity two in sequence. There are gaps between the outer wall of the threaded shaft and the end cap, cavity one and cavity two, so that the position of the threaded shaft axis can be adjusted.

[0010] Multiple sets of external fasteners are threaded to the end cap, and their inner ends are clamped between the inner wall of the cavity and the support block. Adjusting the external fasteners is used to fill the gap between the inner wall of the cavity and the support block.

[0011] A further preferred embodiment of this utility model is: the support block is in the shape of a boss, and when the axis of the support block deviates, it always maintains the coverage of the cavity hole two and the hole through which the threaded shaft passes through the end cap.

[0012] A further preferred embodiment of this utility model is as follows: multiple sets of external fastening parts are evenly distributed circumferentially on the end cap. The external fastening parts include an external threaded rod and a clamping block. The external threaded rod is threadedly connected to the end cap. The clamping block is rotatably connected to the end of the external threaded rod and located at the inner end of the end cap. The clamping block is clamped between the inner wall of the cavity and the support block, and the outer side of the clamping block is in contact with the inner wall of the cavity. When the clamping block moves inward toward the axis of the cavity, the inner side of the clamping block is in contact with the support block.

[0013] A further preferred embodiment of this utility model is that the clamping block is a trapezoidal shape with one side vertical and the other side inclined.

[0014] A further preferred embodiment of this utility model is: the outer side of the clamping block is arc-shaped and fits against the inner wall of the cavity.

[0015] A further preferred embodiment of this utility model is that the inner side of the clamping block is parallel to the outer inclined surface of the support block.

[0016] A further preferred embodiment of this utility model is that the inner wall of the cavity, the outer wall of the support block, and the outer wall of the clamping block are all smooth and without protrusions.

[0017] A further preferred embodiment of this utility model is: the flange has multiple threaded holes distributed around the circumference of the cavity, and the end cover has multiple fastening threaded rods distributed around the circumference, which are threadedly engaged with the threaded holes to fix the end cover to the flange.

[0018] A further preferred embodiment of this utility model is that the area of ​​the threaded shaft head is smaller than the area of ​​the end face of the support block and the end cap that abuts against each other.

[0019] A further preferred embodiment of this utility model is that the area of ​​the threaded shaft head is larger than the area of ​​the hole through the end cap of the threaded shaft body.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] 1. The reserved clearance between the threaded shaft and the end cover, cavity one, and cavity two allows for slight offset of the threaded shaft during assembly, compensates for the tolerance of the engine mounting hole and the starter end cover hole, and avoids stress concentration caused by forced assembly.

[0022] 2. Multiple sets of external fasteners fill the gap between the inner wall of the cavity and the support block through the clamping block, turning the flexible floating threaded shaft into a rigid fixed state, preventing the threaded shaft from fretting due to vehicle vibration, minimizing the offset between the starter pinion and the flywheel centerline, and reducing wear. Attached Figure Description

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a partially exploded structural diagram of the connecting component of this utility model;

[0026] Figure 3 This is an exploded structural diagram of the connecting component of this utility model;

[0027] Figure 4 This is a partial cross-sectional view of the flange and connecting components of this utility model.

[0028] In the diagram: 1. Starter end cover; 2. Flange; 21. Cavity 1; 22. Stepped layer; 23. Cavity 2; 24. Threaded hole; 3. Connecting component; 31. Support block; 32. End cover; 33. Threaded shaft; 34. Fastening threaded rod; 35. External fastening part; 351. External threaded rod; 352. Clamping block. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0030] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0031] This embodiment mainly describes a flexible positioning starter end cover. Please refer to [link / reference]. Figures 1-4Specifically, as follows: In the current assembly of automobile starters and engines, the threaded shaft 33 connects the starter to the engine. The stress on the threaded shaft 33 is a real issue. Based on this, a flexible positioning starter end cover is proposed, including a starter end cover 1, with a flange 2 integrally formed on the starter end cover 1. The flange 2 has a connecting component 3, which is used to fix the starter to the engine. The connecting component 3 includes:

[0032] The support block 31 and the flange 2 have a through cavity 21. The inner wall of the cavity 21 has an integral stepped layer 22. The stepped layer 22 has a cavity 23 coaxially arranged with the cavity 21. The support block 31 is located inside the cavity 21.

[0033] End cap 32 is fixed to the outside of flange 2 and is used to cover cavity 21. The two ends of support block 31 abut against step layer 22 and end cap 32 respectively.

[0034] The threaded shaft 33 passes through the end cover 32, the support block 31, the first cavity 21 and the second cavity 23 in sequence. There are gaps between the outer wall of the threaded shaft 33 and the end cover 32, the first cavity 21 and the second cavity 23, so that the position of the axis of the threaded shaft 33 can be adjusted.

[0035] Multiple sets of external fasteners 35 are threadedly connected to the end cap 32, and their inner ends are clamped between the inner wall of the cavity 21 and the support block 31. The external fasteners 35 are adjusted to fill the gap between the inner wall of the cavity 21 and the support block 31.

[0036] Specifically, the lug of flange 2 has a cavity 21, the inner wall of cavity 21 has an integral stepped layer 22, and the stepped layer 22 has a cavity 23. Through the cooperation of support block 31, end cover 32, threaded shaft 33 and multiple sets of external fasteners 35 with cavity 21 and cavity 23, the axis of threaded shaft 33 can be aligned with the axis of cavity 21 and cavity 23, or it can be offset from the axis of cavity 21 and cavity 23. It should be noted that even if the axis of threaded shaft 33 is offset from the axis of cavity 21 and cavity 23, the axis of threaded shaft 33 is still parallel to the axis of cavity 21 and cavity 23.

[0037] like Figures 2-4 As shown, the support block 31 is in the shape of a boss. When the axis of the support block 31 deviates, it always keeps the cavity hole 23 and the threaded shaft 33 through the hole of the end cover 32 covered.

[0038] Specifically, when the support block 31 shifts with the threaded shaft 33, the threaded shaft 33 tightens, causing the end cover 32 and the support block 31 to be squeezed. When the axis of the support block 31 deviates, it always keeps the cavity hole 23 and the hole through which the threaded shaft 33 passes through the end cover 32 covered, ensuring that the threaded shaft 33 has sufficient force-bearing area when the end cover 32 and the support block 31 are squeezed, thus providing stable support for the threaded shaft 33.

[0039] like Figure 4 The diagram shows the specific structure of the external fastening part 35. Multiple sets of external fastening parts 35 are evenly distributed circumferentially on the end cap 32. The external fastening part 35 includes an external threaded rod 351 and a clamping block 352. The external threaded rod 351 is threadedly connected to the end cap 32. The clamping block 352 is rotatably connected to the end of the external threaded rod 351 and located at the inner end of the end cap 32. The clamping block 352 is clamped between the inner wall of the cavity 21 and the support block 31, and the outer side of the clamping block 352 is in contact with the inner wall of the cavity 21. When the clamping block 352 moves inward toward the axis of the cavity 21, the inner side of the clamping block 352 is in contact with the support block 31.

[0040] Specifically, the external fastening part 35 includes an external threaded rod 351 and a clamping block 352. By rotating the external threaded rod 351, the clamping block 352 can be moved between the inner wall of the cavity 21 and the support block 31 to fill the gap between them. It should be noted that when the threaded shaft 33 is assembled with the engine mounting hole, the threaded shaft 33 is prone to misalignment, causing the gap between the inner wall of the cavity 21 and the support block 31 to vary in width. By rotating the external threaded rod 351, the clamping blocks 352 at different positions can be clamped between the inner wall of the cavity 21 and the support block 31 at the corresponding positions.

[0041] like Figures 2-4 As shown, the clamping block 352 is a trapezoidal shape with one side vertical and the other side inclined. Specifically, the outer side of the clamping block 352 is fitted with the inner wall of the cavity 21, and the inner side is fitted with the support block 31 to achieve a stable support function.

[0042] The outer side of the clamping block 352 is arc-shaped and fits against the inner wall of the cavity 21. Specifically, this allows the clamping block 352 to fit against the inner wall of the cavity 21, so that the clamping block 352 remains stable and does not rotate when the external threaded rod 351 rotates.

[0043] The inner side of the clamping block 352 is parallel to the outer inclined surface of the support block 31, so that the inner side of the clamping block 352 fits against the outer side of the support block 31 to maintain a stable supporting effect.

[0044] The inner wall of cavity 21, the outer wall of support block 31, and the outer wall of clamping block 352 are all smooth and without protrusions. When the threaded shaft 33 is engaged with the engine mounting hole, the support block 31 is easy to produce a gap, and the inner and outer sides of the clamping block 352 can be fitted together when it is tightened.

[0045] like Figure 2 As shown, the flange 2 has multiple threaded holes 24 distributed around the circumference of the cavity hole 21. The end cover 32 has multiple fastening threaded rods 34 distributed around the circumference. The fastening threaded rods 34 are threadedly engaged with the threaded holes 24 to fix the end cover 32 to the flange 2. Specifically, the end cover 32 is fixed to the flange 2 by the fastening threaded rods 34.

[0046] The head area of ​​the threaded shaft 33 is smaller than the area of ​​the end face of the support block 31 and the end cover 32 that abut against each other. When the threaded shaft 33 is tightened, the head of the threaded shaft 33 will squeeze the support block 31 and the end cover 32 to maintain a relatively large support area and avoid deformation.

[0047] The head area of ​​the threaded shaft 33 is larger than the area of ​​the hole through the end cap 32 of the threaded shaft 33, so as to prevent the head of the threaded shaft 33 from separating from the end cap 32 and ensure that they are in a mating state. At the same time, when the position of the threaded shaft 33 deviates, its head will also cover the hole through the end cap 32 of the threaded shaft 33.

[0048] Working principle: When the starter motor is fixed to the engine, it is fixed by the threaded shaft 33 on the starter motor and the mounting hole on the engine. The position of the engine mounting hole is fixed, and the positions of cavity hole 21 and cavity hole 23 on flange 2 are also fixed. The threaded shaft 33 is rigidly set. When there is a significant tolerance deviation between the engine mounting hole and cavity hole 21 and cavity hole 23, and at the same time, within the range of forced fit of the threaded shaft 33, the engine and starter motor are forcibly fitted by the threaded shaft 33, which can easily generate stress.

[0049] Based on the above, by setting gaps between the outer wall of the threaded shaft 33 and the end cover 32, cavity one 21, and cavity two 23, the position of the threaded shaft 33 can be adjusted to a certain extent. After adjustment, the threaded shaft 33 can smoothly mate with the engine mounting hole, avoiding stress. However, due to the certain degree of mobility between the threaded shaft 33 and the flange 2, during vehicle vibration, the threaded shaft 33 may mate with the engine mounting hole, while the threaded shaft 33 and the flange 2 may deviate, potentially causing the starter motor to deviate and altering the centerline of the pinion and the flywheel. Abnormal wear occurs due to parallelism and center distance. Based on this, after the threaded shaft 33 is fitted with the engine mounting hole, multiple sets of external threaded rods 351 are rotated to push the clamping block 352 into the cavity 21. The outer side of the clamping block 352 abuts against the inner wall of the cavity 21, and the inner side abuts against the rod part of the threaded shaft 33. It should be noted that all the external threaded rods 351 are rotated first so that the outer side of the clamping block 352 abuts against the inner wall of the cavity 21 and the inner side abuts against the rod part of the threaded shaft 33. Then all the external threaded rods 351 are tightened to avoid stress on the threaded shaft 33.

[0050] It should also be noted that the point where the threaded shaft 33 and the clamping block 352 are pressed together may not have threads, so that the clamping block 352 can fully contact the shaft of the threaded shaft 33, thus avoiding damage to the threads.

[0051] It should also be noted that when all the external threaded rods 351 rotate, the outer side of the clamping block 352 abuts against the inner wall of the cavity 21, and the inner side abuts against the rod part of the threaded shaft 33. At this time, the threaded shaft 33 is already in a tightened state, which puts the support block 31 and the end cap 32 into a compressed state. Therefore, the position of the threaded shaft 33 will not change during the rotation of the external threaded rods 351. Then, during the rotation and tightening process of the external threaded rods 351, since the outer side of the threaded shaft 33 abuts against the clamping block 352, the threaded shaft 33 is also prevented from being deformed by force and generating stress.

[0052] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] The above provides a detailed description of a flexible positioning starter end cover provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A flexible positioning starter end cover, comprising a starter end cover, wherein a flange is integrally formed on the starter end cover, characterized in that, The flange has connecting parts for securing it to the engine. These connecting parts include: The support block has a through cavity one on the flange. The inner wall of cavity one has an integral stepped layer. A cavity two is opened inside the stepped layer and is coaxially arranged with the cavity one. The support block is located inside cavity one. The end cap is fixed to the outside of the flange and is used to cover the cavity. The two ends of the support block abut against the step layer and the end cap, respectively. The threaded shaft passes through the end cap, support block, cavity one and cavity two in sequence. There are gaps between the outer wall of the threaded shaft and the end cap, cavity one and cavity two, so that the position of the threaded shaft axis can be adjusted. Multiple sets of external fasteners are threaded to the end cap, and their inner ends are clamped between the inner wall of the cavity and the support block. Adjusting the external fasteners is used to fill the gap between the inner wall of the cavity and the support block.

2. The flexible positioning starter end cover according to claim 1, characterized in that, The support block is shaped like a boss. When the axis of the support block deviates, it always keeps the cavity hole two and the hole through the threaded shaft of the end cover covered.

3. The flexible positioning starter end cover according to claim 2, characterized in that, Multiple sets of external fasteners are evenly distributed circumferentially on the end cap. The external fasteners include an external threaded rod and a clamping block. The external threaded rod is threadedly connected to the end cap. The clamping block is rotatably connected to the end of the external threaded rod and located at the inner end of the end cap. The clamping block is clamped between the inner wall of the cavity and the support block, and the outer side of the clamping block is in contact with the inner wall of the cavity. When the clamping block moves inward toward the axis of the cavity, the inner side of the clamping block is in contact with the support block.

4. The flexible positioning starter end cover according to claim 3, characterized in that, The clamping block is trapezoidal in shape, with one side vertical and the other side inclined.

5. The flexible positioning starter end cover according to claim 3, characterized in that, The outer side of the clamping block is arc-shaped and fits against the inner wall of the cavity.

6. The flexible positioning starter end cover according to claim 3, characterized in that, The inner side of the clamping block is parallel to the outer inclined surface of the support block.

7. The flexible positioning starter end cover according to claim 3, characterized in that, The inner wall of the cavity, the outer wall of the support block, and the outer wall of the clamping block are all smooth and without protrusions.

8. The starter end cover with flexible positioning according to claim 1, characterized in that, The flange has multiple threaded holes distributed around the circumference of the cavity, and the end cover has multiple fastening threaded rods distributed around the circumference. The fastening threaded rods are threaded into the threaded holes to fix the end cover to the flange.

9. The flexible positioning starter end cover according to claim 2, characterized in that, The area of ​​the threaded shaft head is smaller than the area of ​​the end face of the support block that abuts against the end cap.

10. The flexible positioning starter end cover according to claim 2, characterized in that, The area of ​​the threaded shaft head is larger than the area of ​​the hole through which the threaded shaft body passes through the end cap.

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