Starting motor gear slow meshing system

Abstract

The utility model discloses a starter motor gear slow meshing system which comprises a cushion block II, a check ring, a ball bearing, a slow meshing system, a shaft sleeve, an ejector rod and a gear. The threaded end of the ejector rod is connected with the gear, and the other end is connected with the slow meshing system. The slow meshing system comprises a cushion block I, a spring I and a bearing. The outer side wall of the ejector rod is sleeved with a bearing, and the end face of the ejector rod makes contact with a spring I fixed to the cushion block I. And the cushion block II is connected with the relay and is fixed on the ball bearing. The other end of the ball bearing is in contact with the end surface of one side, far away from the spring I, of the cushion block I; when the relay is ejected out, the system integrally extends out under the action of the spring, when the gear makes contact with the flywheel gear ring, friction resistance is formed between the gear and the end face of the flywheel gear ring under the action of ejection pressure, the spring I can reduce the friction resistance in the contact process, and the gear can be rapidly inserted into the flywheel gear ring; after complete meshing, the system completely inserts the flywheel into the flywheel gear under the action of the ejection force of the relay, and a starting process is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of starting motors, and particularly relates to a starting motor gear slow engagement system. Background Art

[0002] With a large number of domestic starting motors being equipped with weapon systems, problems such as tooth jamming, contact ablation, and gear rupture have emerged one after another. As the power unit of the weapon system, the poor reliability of the starting motor severely restricts the development of the weapon equipment system. The existing starting motor gear engagement adopts a hard connection structure. When starting, there is a large frictional resistance between the gear and the end face of the flywheel ring gear, and the gear cannot be inserted into the flywheel ring gear to form tooth jamming. Moreover, the gear often gets stuck when extending and retracting. Multiple tooth jammings will lead to problems such as contact ablation and gear rupture of the starting motor, directly affecting the reliability of the starting motor. Content of the Utility Model

[0003] The purpose of the utility model is to provide a starting motor gear slow engagement system, which includes spacer block II, retaining ring, ball bearing, slow engagement system, bushing, ejector rod, and gear.

[0004] One end of the ejector rod is provided with a thread.

[0005] The end of the ejector rod with the thread is connected to the gear, and the other end is connected to the slow engagement system.

[0006] The outer side walls of the ejector rod and the slow engagement system are sleeved with a bushing.

[0007] The slow engagement system includes spacer block I, spring I, and bearing.

[0008] A bearing is sleeved on the outer side wall of the ejector rod.

[0009] The end face of the ejector rod contacts with spring I.

[0010] The other end of spring I is fixed on spacer block I.

[0011] Spacer block II is connected to the relay of the starting motor and fixed on the ball bearing.

[0012] A retaining ring is arranged at one end of the ball bearing, and the other end contacts with the end face of spacer block I on the side away from spring I.

[0013] Spacer block II, retaining ring, and ball bearing are all arranged in the bushing.

[0014] Further, the ejector rod is formed by extrusion boss.

[0015] Further, a pressure ring is sleeved on the outer side wall of the ejector rod, and the pressure ring is arranged on the side of the bearing close to spring I.

[0016] Further, the bearing is a self-made bearing assembled with n steel balls.

[0017] Further, the inner side wall of the bushing fits with the outer side walls of the retaining ring, ball bearing, spacer block I, bearing, and ejector rod;

[0018] The bushing is a hollow stepped rotary body structure;

[0019] An annular groove is provided at the position where the bushing contacts the spacer block II, and the spacer block II is embedded in the annular groove.

[0020] Further, a spring II is sleeved outside the bushing and the ejector rod.

[0021] The technical effects of the present utility model are beyond doubt, and the beneficial effects of the present utility model are as follows:

[0022] 1. The spring buffer connection at the meshing contact part relieves the collision force when the gear contacts the end face of the flywheel ring gear during meshing, reducing the frictional resistance generated when the gear contacts the end face of the flywheel ring gear. The top gear rate of the starting motor drops significantly, from no more than 2 times in 10 times originally to no more than 2 times in 50 times.

[0023] 2. The ejector rod adopts the extrusion boss forming and positioning method. The strength of the boss is improved through heat treatment, and after machining and calibration, the straightness requirement is met. The influence of the machining accuracy of the spring retaining ring and the groove shape of the ejector rod on the fit is eliminated, and at the same time, the influence of the deformation of the spring retaining ring on the positioning accuracy of the ejector rod is eliminated, improving the flexibility of the ejector rod to extend and retract, and ensuring the normal extension and retraction of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] In the figure: 1 - spacer block II; 2 - retaining ring; 3 - ball bearing; 4 - spacer block I; 5 - spring I; 6 - pressure ring; 7 - bearing; 8 - bushing; 9 - spring II; 10 - ejector rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present utility model will be further described below in conjunction with the embodiments, but it should not be understood that the above-mentioned theme scope of the present utility model is limited to the following embodiments. Without departing from the above-mentioned technical idea of the present utility model, various substitutions and changes made according to the common general knowledge and customary means in the art should be included within the protection scope of the present utility model.

[0027] Embodiment 1:

[0028] See Figure 1 , a starting motor gear slow meshing system, including spacer block II 1, retaining ring 2, ball bearing 3, slow meshing system, bushing 8, ejector rod 10, and gear.

[0029] One end of the ejector rod 10 is provided with a thread.

[0030] The threaded end of the ejector rod 10 is connected to a gear, and the other end is connected to a slow engagement system.

[0031] A bushing 8 is sleeved on the outer side walls of the ejector rod 10 and the slow engagement system.

[0032] The slow engagement system includes a spacer block I 4, a spring I 5, and a bearing 7.

[0033] A bearing 7 is sleeved on the outer side wall of the ejector rod 10.

[0034] The end face of the ejector rod 10 is in contact with the spring I 5.

[0035] The other end of the spring I 5 is fixed on the spacer block I 4.

[0036] The spacer block II 1 is connected to the relay of the starting motor and fixed on the ball bearing 3, which is used to eliminate the influence of the rotation of the ejector rod 10 (the relay core does not rotate) and transmit the relay ejection force.

[0037] A retaining ring 2 is provided at one end of the ball bearing 3 to limit the position of the ball bearing 3 and make the ball bearing 3 have no axial movement.

[0038] The retaining ring 2 and the spacer block II 1 are on the same side of the ball bearing 3.

[0039] The other end of the ball bearing 3 is in contact with the end face of the spacer block I 4 on the side away from the spring I 5.

[0040] The spacer block II 1, the retaining ring 2, and the ball bearing 3 are all arranged inside the bushing 8.

[0041] Embodiment 2:

[0042] The main structure of this embodiment is the same as that of Embodiment 1. Further, the ejector rod 10 is formed by extrusion boss, and has high overall straightness.

[0043] Embodiment 3:

[0044] The main structure of this embodiment is the same as any one of Embodiments 1 to 2. Further, a pressure ring 6 is sleeved on the outer side wall of the ejector rod 10, and the pressure ring 6 is arranged on the side of the bearing 7 close to the spring I 5.

[0045] Embodiment 4:

[0046] The main structure of this embodiment is the same as any one of Embodiments 1 to 3. Further, the bearing 7 is a self-made bearing assembled with n steel balls.

[0047] Embodiment 5:

[0048] The main structure of this embodiment is the same as that of Embodiment 4. Further, there are 11 steel balls in the bearing 7. It is formed by assembly.

[0049] Embodiment 6:

[0050] The main structure of this embodiment is the same as any one of Embodiments 1 to 5. Further, the bearing 7 and the ejector rod 10 can rotate independently to reduce the rotational influence after the ejection engagement.

[0051] Embodiment 7:

[0052] The main structure of this embodiment is the same as any one of Embodiments 1 to 6. Further, the inner side wall of the bushing 8 fits with the outer side walls of the retaining ring 2, the ball bearing 3, the spacer I 4, the bearing 7, and the ejector rod 10.

[0053] The bushing 8 is a hollow stepped rotary body structure.

[0054] An annular groove is provided at the position where the bushing 8 contacts the spacer II 1, and the spacer II 1 is embedded in the annular groove.

[0055] Embodiment 8:

[0056] The main structure of this embodiment is the same as any one of Embodiments 1 to 7. Further, a spring II 9 is sleeved outside the bushing 8 and the ejector rod 10.

[0057] Embodiment 9:

[0058] The main structure of this embodiment is the same as any one of Embodiments 1 to 8. Further, at the initial stage of the relay operation, the ejector rod 10 is integrally ejected under the action of the spring I 5 and is fully engaged with the flywheel ring gear;

[0059] When the gear is engaged with the flywheel, the ejector rod 10 compresses the spring I 5 until the ejector rod 10 contacts the spacer I 4. After the contact, the ejector rod 10 continues to be integrally ejected.

[0060] Embodiment 10:

[0061] The main structure of this embodiment is the same as any one of Embodiments 1 to 9. Further, during the compression of the spring I 5, the frictional resistance between the gear and the flywheel ring gear is reduced, making it easier for the gear to engage with the flywheel ring gear.

[0062] Embodiment 11:

[0063] The main structure of this embodiment is the same as any one of Embodiments 1 to 10. Further, when the relay ejects, the ejector rod 10 extends integrally under the action of the spring I 5 until the gear contacts the flywheel ring gear;

[0064] Under the action of the ejection pressure, a frictional resistance is formed between the end faces of the gear and the flywheel ring gear. The gap between the spacer I4 and the ejector rod 10 serves as a buffer system, reducing the frictional resistance when the gear contacts the flywheel ring gear and enabling the gear to be quickly inserted into the flywheel ring gear;

[0065] After complete meshing, under the action of the relay ejection force of the ejector rod 10, the flywheel is fully inserted into the flywheel gear to start the engine, completing one start-up process.

[0066] Embodiment 12:

[0067] The main structure of this embodiment is the same as any one of Embodiments 1 to 11. Further, the spacer II1 is connected to the starting motor relay and fixed on the ball bearing 6343, eliminating the influence of the rotation of the ejector rod on the non-rotation of the relay magnetic core and playing a role in transmitting the relay ejection force.

[0068] The snap ring 162 restricts the position of the ball bearing 6343, preventing the ball bearing 6343 from having axial movement.

[0069] A certain gap is provided between the spacer I4 and the ejector rod 10. In the initial stage of the relay operation, the ejector rod system is integrally ejected under the action of the spring 5. When the gear meshes with the flywheel, the ejector rod compresses the spring 5, and when the ejector rod 10 contacts the spacer I4, it continues to be integrally ejected.

[0070] During the spring compression process, the frictional resistance between the gear and the flywheel ring gear is reduced, making it easier for the gear to mesh. This function is the slow meshing system.

[0071] The steel ball 11 ball bearings are assembled to form a self-made bearing. The buffer system and the ejector rod can rotate independently, reducing the rotational influence after ejection and meshing.

[0072] The ejector rod 10 is formed by extrusion boss molding, with high overall straightness. The threaded part at the right end is connected to the gear and rotates at high speed with the starting gear. The left end is connected to the steel ball The spring 5 and the spacer I4 form a slow meshing system.

[0073] Embodiment 13:

[0074] The main structure of this embodiment is the same as any one of Embodiments 1 to 12. Further, a starting motor gear slow engagement system includes a push rod 10, which is formed by extrusion bosses, eliminating the influence on the fit caused by the machining accuracy of the spring circlip and the push rod groove shape, and at the same time eliminating the influence on the positioning accuracy of the push rod caused by the deformation of the spring circlip. When the left relay ejects, the system extends as a whole under the action of the spring 5. When the right assembled gear contacts the flywheel ring gear, due to the ejection pressure, a frictional resistance is formed between the gear and the end face of the flywheel ring gear. The gap between the spacer I4 and the push rod 10 serves as a buffer system, which can reduce the frictional resistance during contact. The gear is quickly inserted into the flywheel ring gear. After complete engagement, the system inserts the flywheel completely into the flywheel gear under the action of the relay ejection force to start the engine, completing one starting process.

Claims

1. A starter motor gear slow meshing system, characterized in that: It includes a cushion block II (1), a retaining ring (2), a ball bearing (3), a slow meshing system, a shaft sleeve (8), a push rod (10) and a gear; One end of the push rod (10) is provided with a thread; The push rod (10) has one end with a thread connected to the gear, and the other end connected to the slow meshing system; The outer side wall of the push rod (10) and the slow meshing system is sleeved with a shaft sleeve (8); The slow engagement system comprises a cushion block I (4), a spring I (5) and a bearing (7); The outer side wall of the push rod (10) is sleeved with a bearing (7); The end surface of the push rod (10) is in contact with the spring I (5); The other end of the spring I (5) is fixed on the cushion block I (4); The cushion block II (1) is connected to the relay of the starter motor and fixed on the ball bearing (3); One end of the ball bearing (3) is provided with a retaining ring (2), and the other end is in contact with the end surface of the cushion block I (4) away from the spring I (5); The cushion block II (1), the retaining ring (2) and the ball bearing (3) are all arranged in the shaft sleeve (8).

2. A starter motor gear slow meshing system according to claim 1, characterized in that: The ejector pin (10) is formed by extrusion bosses.

3. A starter motor gear slow meshing system according to claim 1, characterized in that: The outer wall of the push rod (10) is sleeved with a pressing ring (6), and the pressing ring (6) is arranged on the side of the bearing (7) close to the spring I (5).

4. A starter motor gear slow meshing system according to claim 1, characterized in that: The bearing (7) is a self-made bearing formed by assembling n steel balls.

5. The starter motor gear slow meshing system according to claim 1, characterized in that: The inner wall of the shaft sleeve (8) fits with the outer walls of the retaining ring (2), the ball bearing (3), the cushion block I (4), the bearing (7), and the push rod (10); The shaft sleeve (8) is a hollow stepped rotating body structure; An annular groove is provided at the position where the shaft sleeve (8) contacts the cushion block II (1), and the cushion block II (1) is embedded in the annular groove.

6. A starter motor gear slow meshing system according to claim 1, characterized in that: The shaft sleeve (8) and the push rod (10) are covered with a spring II (9).

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