Starter isolator and starter thereof

Abstract

The embodiment of the invention provides a starter isolator and a starter thereof, and relates to the technical field of starters, the starter isolator is provided with a shell, an output shaft and a hollow shaft, a bearing is arranged in the shell, the output shaft is arranged in the shell, and the output shaft is sequentially provided with a straight external spline, a large shaft part and a spiral external spline; the large shaft part is movably connected with the bearing, a first step is arranged on the large shaft part, a spiral inner spline meshed with the spiral outer spline in a full-tooth mode is arranged in the hollow shaft, and when the output shaft moves towards the straight outer spline along the axis, the bearing abuts against the first step to limit the moving distance of the output shaft. According to the starter isolator, the output shaft is limited through the first step, full-tooth meshing of the hollow shaft and the spiral outer spline is achieved, the meshing length of the hollow shaft and the spiral outer spline is increased, and the bearing capacity and stability of the starter isolator are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of starters, and in particular to a starter isolator and a starter thereof. Background Art

[0002] In the prior art, in the second generation noseless structure automobile reduction starter one-way device, the planet carrier and the one-way device are integrated into one, the one-way device sleeve and the hollow shaft can only rotate but not pop out, and the output shaft of the one-way device can axially pop out and rotate at the same time.

[0003] like Figure 1 and Figure 2 As shown, the structural principle of the existing output shaft being limited by the hollow shaft is as follows: the spiral external spline of the output shaft is axially divided into two parts, the number of teeth at the front end is an even number, assuming that it is 10 teeth and the number of grooves is 10. When processing the 10 spline grooves at the rear end, only 5 grooves are evenly distributed, that is, 5 of the grooves are filled, so that the rear end has 5 normal grooves and 5 widened teeth, and there is a gap of about 2mm between the front and rear ends. The number of teeth designed for the spiral internal spline of the hollow shaft is also 10. During processing, 5 of the teeth are evenly removed, that is, 5 normal teeth and 5 widened grooves. During assembly, the spiral external spline of the output shaft is inserted into the spiral internal spline from the rear end, and the widened teeth of the output shaft are aligned with the widened grooves of the hollow shaft, and inserted to the maximum position. When the internal and external splines are completely disengaged, they are relatively rotated circumferentially by an angle of one tooth and then pulled back in the reverse direction to assemble into a one-way device assembly. In this way, when the filled groove of the output shaft faces the spiral internal spline teeth, the output shaft cannot move forward any further when the two parts move to the contact position, thus realizing the limit of the output shaft by the hollow shaft. However, the spiral external spline of the output shaft of the existing starter is divided into two parts, the actual meshing length is short, and only half of the teeth are actually meshed, resulting in low bearing capacity and stability of the starter isolator. Summary of the invention

[0004] The embodiment of the present invention provides a starter isolator and a starter thereof, so as to solve the technical problems of low bearing capacity and stability of the starter isolator in the related art.

[0005] In a first aspect, an embodiment of the present invention provides a starter isolator, which includes a housing, and a bearing is provided inside the housing;

[0006] An output shaft is arranged in the housing, the output shaft is provided with a straight external spline, a large shaft portion and a spiral external spline in sequence, the large shaft portion is movably connected to the bearing, and a first step is provided on the large shaft portion;

[0007] A hollow shaft, the interior of which is provided with a spiral internal spline fully meshed with the spiral external spline;

[0008] When the output shaft is moved along the axis toward the straight external spline direction, the bearing abuts against the first step to limit the moving distance of the output shaft.

[0009] In some embodiments, it also includes:

[0010] A drive module is disposed in the shell, and includes a first drive component and a second drive component. The first drive component is clamped with the large shaft portion, the first drive component is used to drive the output shaft to move along the axis toward the straight external spline direction, and the second drive component is used to drive the hollow shaft to rotate.

[0011] In some embodiments, the first driving assembly includes: an electromagnetic coil, a moving iron core, and a driving part;

[0012] The moving iron core is connected to the electromagnetic coil and the driving unit, and the driving unit is connected to the output shaft.

[0013] In some embodiments, the driving unit includes:

[0014] A shift fork, one end of which is connected to the moving iron core, and the other end of which is clamped to the output shaft;

[0015] A shift fork pin is rotatably connected to the middle portion of the shift fork and fixed in the housing.

[0016] In some embodiments, there are also provided: a slip ring;

[0017] The slip ring is sleeved on the outer periphery of the output shaft and is located between the first step and the spiral external spline, and the shift fork is clamped in the slip ring.

[0018] In some embodiments, there is also:

[0019] A wire retaining ring, wherein the large shaft portion is also provided with a first retaining groove, the wire retaining ring is sleeved on the first retaining groove, and the slip ring is clamped between the first step and the wire retaining ring.

[0020] In some embodiments, the second drive assembly comprises: a motor and a reducer;

[0021] The reducer is connected to the motor and the hollow shaft.

[0022] In some embodiments, there is also:

[0023] A gear is provided with a stepped through hole therein, wherein the stepped through hole comprises a first through hole and a second through hole matched with the straight external spline.

[0024] In some embodiments, there is also:

[0025] A top tooth spring, wherein one end of the large shaft portion close to the straight external spline is further provided with a second step, one end of the top tooth spring abuts against the second step, and the other end of the top tooth spring abuts against the bottom of the first through hole.

[0026] In a second aspect, an embodiment of the present invention provides a starter, comprising the aforementioned starter isolator.

[0027] The beneficial effects brought about by the technical solution provided by the present invention include:

[0028] The embodiment of the present invention provides a starter one-way device and a starter thereof, wherein the starter one-way device is provided with a housing, an output shaft and a hollow shaft, a bearing is provided inside the housing, the output shaft is provided inside the housing, the output shaft is provided with a straight external spline, a large shaft portion and a spiral external spline in sequence, the large shaft portion is movably connected to the bearing, the large shaft portion is provided with a first step, a spiral internal spline fully meshed with the spiral external spline is provided inside the hollow shaft, when the output shaft is moved along the axis toward the straight external spline, the bearing abuts against the first step to limit the moving distance of the output shaft. The embodiment of the present invention adopts the first step to limit the output shaft, realizes the full tooth meshing of the hollow shaft and the spiral external spline, increases the meshing length of the hollow shaft and the spiral external spline, and improves the bearing capacity and stability of the starter one-way device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0030] Figure 1 It is a structural schematic diagram of an output shaft of an existing starter one-way device;

[0031] Figure 2 It is a structural schematic diagram of a hollow shaft of an existing starter non-return device;

[0032] Figure 3 A cross-sectional view of a starter isolator provided in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of an output shaft of a starter isolator provided in an embodiment of the present invention;

[0034] Figure 5 An assembly cross-sectional view of an output shaft and a hollow shaft of a starter isolator provided in an embodiment of the present invention;

[0035] Figure 6A schematic structural diagram of a hollow shaft of a starter isolator provided in an embodiment of the present invention;

[0036] Reference numerals:

[0037] 1. Shell;

[0038] 2. output shaft; 21. straight external spline; 22. large shaft; 221. first step; 222. first slot; 223. second step; 23. spiral external spline;

[0039] 3. Hollow shaft; 31. Helical internal spline;

[0040] 4. driving module; 41. first driving assembly; 411. electromagnetic coil; 412. moving iron core; 413. driving unit; 4131. shift fork; 4132. shift fork pin;

[0041] 5. Slip ring;

[0042] 6. Wire retaining ring;

[0043] 7. gear; 71. first through hole; 72. second through hole;

[0044] 8. Top tooth spring;

[0045] 9. Bearings. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The embodiment of the present invention provides a starter isolator and a starter thereof, which can solve the technical problems of low bearing capacity and stability of the starter isolator in the prior art.

[0048] See also Figure 3 and Figure 6As shown, an embodiment of the present invention provides a starter check valve, which is provided with a housing 1, an output shaft 2 and a hollow shaft 3. A bearing 9 is provided inside the housing 1, and the output shaft 2 is arranged inside the housing 1. The output shaft 2 is provided with a straight external spline 21, a large shaft portion 22 and a spiral external spline 23 in sequence. The large shaft portion 22 is movably connected to the bearing 9. The large shaft portion 22 is provided with a first step 221. The hollow shaft 3 is provided with a spiral internal spline 31 that is fully tooth-engaged with the spiral external spline 23. When the output shaft 2 is moved along the axis toward the straight external spline 21, the bearing 9 abuts against the first step 221 to limit the moving distance of the output shaft 2. The embodiment of the present invention adopts the first step 221 to limit the output shaft 2, realizes the full tooth engagement of the hollow shaft 3 and the spiral external spline 23, increases the meshing length of the hollow shaft 3 and the spiral external spline 23, and improves the bearing capacity and stability of the starter check valve.

[0049] The embodiment of the present invention provides a starter one-way device, which is provided with a housing, an output shaft and a hollow shaft. A bearing is provided inside the housing, and the output shaft is provided inside the housing. The output shaft is provided with a straight external spline, a large shaft portion and a spiral external spline in sequence. The large shaft portion is movably connected to the bearing, and a first step is provided on the large shaft portion. A spiral internal spline fully meshed with the spiral external spline is provided inside the hollow shaft. When the output shaft is moved along the axis toward the straight external spline, the bearing abuts against the first step to limit the moving distance of the output shaft. The embodiment of the present invention uses the first step to limit the output shaft, realizes the full-tooth meshing of the hollow shaft and the spiral external spline, increases the meshing length of the hollow shaft and the spiral external spline, and improves the bearing capacity and stability of the starter one-way device.

[0050] As an optional implementation, in an embodiment of the invention, see Figure 3 As shown, a driving module 4 is also provided, which is arranged in the shell 1. The driving module 4 is provided with a first driving component 41 and a second driving component. The first driving component 41 is clamped with the large shaft portion 22. The first driving component 41 is used to drive the output shaft 2 to move along the axis toward the straight external spline 21, and the second driving component is used to drive the hollow shaft 3 to rotate to provide rotational power. The first driving component 41 and the second driving component of the present invention cooperate to provide axial ejection and rotational power for the output shaft 2, thereby improving the reliability of the starter one-way device.

[0051] As an optional implementation, in an embodiment of the invention, see Figure 3As shown, the first drive component 41 is provided with an electromagnetic coil 411, a moving iron core 412 and a driving part 413, wherein the moving iron core 412 is connected to the electromagnetic coil 411 and the driving part 413, and the driving part 413 is connected to the output shaft 2. The working process of the first drive component 41 is as follows: the power switch is closed, the electromagnetic coil 411 is energized to generate electromagnetic suction to move the moving iron core 412, drive the driving part 413, and thus drive the output shaft 2 to move outward, and after moving a set distance, the first step 221 of the output shaft 2 contacts the end face of the bearing 9, and the movement stops. At this time, the straight external spline 21 of the output shaft 2 is connected to the engine, the main contact of the electromagnetic switch is also connected, the switch coil is short-circuited, and a large current directly enters the inside of the starter to start driving the engine to rotate and ignite successfully. Then, the power switch is turned off, the electromagnetic suction of the electromagnetic coil 411 disappears, the output shaft 2 returns to its original position, and the starting is completed. The first drive component of the present invention has a simple structure and stable coordination, and improves the working efficiency of the starter isolator.

[0052] As an optional implementation, in an embodiment of the invention, see Figure 3 As shown, the driving part 413 is provided with a fork 4131 and a fork pin 4132, one end of the fork 4131 is connected to the moving iron core 412, the other end of the fork 4131 is clamped with the output shaft 2, the fork pin 4132 is rotatably connected to the middle part of the fork 4131 and fixed in the housing 1, the electromagnetic coil 411 is energized to move the moving iron core 412, driving the fork 4131 to rotate around the fork pin 4132, the forked part at the tail end of the fork 4131 is clamped on the output shaft 2 of the isolator, and the output shaft 2 is driven to move outward when the fork 4131 rotates. The driving part of the present invention has a simple structure and a stable connection.

[0053] As an optional implementation, in an embodiment of the invention, see Figure 3 and Figure 5 As shown, a slip ring 5 is further provided, the slip ring 5 is sleeved on the outer periphery of the output shaft 2 and is located between the first step 221 and the spiral external spline 23, and the shift fork 4131 is clamped in the slip ring 5. The cross section of the slip ring 5 is an open structure, and the open structure is adapted to the shape of the forked part at the tail end of the shift fork 4131, and in the embodiment of the present invention, the slip ring 5 and the output shaft 2 are detachably connected, and the connection is stable and easy to disassemble.

[0054] As an optional implementation, in an embodiment of the invention, see Figure 3 , Figure 4 and Figure 5As shown, a wire retaining ring 6 is also provided, and a first clamping groove 222 is also provided on the large shaft portion 22. The wire retaining ring 6 is sleeved on the first clamping groove 222, and the slip ring 5 is clamped between the first step 221 and the wire retaining ring 6. The wire retaining ring 6 and the first step 221 clamp the slip ring 5 to fix it, thereby improving the structural stability of the starter isolator.

[0055] As an optional implementation, in an embodiment of the invention, the second drive component is provided with a motor and a reducer, and the reducer is connected to the motor and the hollow shaft 3. The reducer is used to reduce the rotation speed and increase the torque. It has a compact structure and meets the demand for high torque output in a small space. The motor and the reducer cooperate to provide rotational power for the hollow shaft 3, thereby improving the working efficiency of the starter one-way device.

[0056] As an optional implementation, in an embodiment of the invention, see Figure 3 As shown, a gear 7 is also provided, wherein a stepped through hole is provided in the gear 7, wherein the stepped through hole is provided with a first through hole 71 and a second through hole 72 which is matched and assembled with the straight external spline 21, wherein the second through hole 72 is provided with an internal spline which is matched with the straight external spline 21. The gear has a simple structure and is easy to assemble, thereby improving the structural stability of the starter non-return device.

[0057] As an optional implementation, in an embodiment of the invention, see Figure 3 As shown, a top tooth spring 8 is also provided, and a second step 223 is also provided at one end of the large shaft portion 22 close to the straight external spline 21, one end of the top tooth spring 8 abuts against the second step 223, and the other end of the top tooth spring 8 abuts against the bottom of the first through hole 71. When the power switch is turned off, the electromagnetic attraction of the electromagnetic coil 411 disappears, and the shift fork 4131 returns the output shaft 2 to its original position under the action of the top tooth spring 8, completing the start. The top tooth spring of the present invention cooperates with the shift fork to reset the output shaft, ensuring the stability of the starter's one-way device and improving the working efficiency.

[0058] The embodiment of the present invention further provides a starter, which includes the aforementioned starter isolator, and the starter isolator includes a housing 1, an output shaft 2 and a hollow shaft 3. A bearing 9 is provided inside the housing 1, and the output shaft 2 is arranged inside the housing 1. The output shaft 2 is provided with a straight external spline 21, a large shaft portion 22 and a spiral external spline 23 in sequence. The large shaft portion 22 is movably connected to the bearing 9, and a first step 221 is provided on the large shaft portion 22. A spiral internal spline 31 fully meshed with the spiral external spline 23 is provided inside the hollow shaft 3. When the output shaft 2 is moved along the axis toward the straight external spline 21, the bearing 9 abuts against the first step 221 to limit the moving distance of the output shaft 2. The embodiment of the present invention uses the first step 221 to limit the output shaft 2, and realizes the full-tooth meshing of the hollow shaft 3 and the spiral external spline 23, thereby increasing the meshing length of the hollow shaft 3 and the spiral external spline 23, and improving the bearing capacity and stability of the starter isolator.

[0059] The embodiment of the present invention provides a starter, including a starter one-way device, the starter one-way device is provided with a housing, an output shaft and a hollow shaft, a bearing is provided inside the housing, the output shaft is provided inside the housing, the output shaft is provided with a straight external spline, a large shaft portion and a spiral external spline in sequence, the large shaft portion is movably connected to the bearing, the large shaft portion is provided with a first step, the hollow shaft is provided with a spiral internal spline fully meshed with the spiral external spline, when the output shaft is moved along the axis toward the straight external spline, the bearing abuts against the first step to limit the moving distance of the output shaft. The embodiment of the present invention uses the first step to limit the output shaft, realizes the full tooth meshing of the hollow shaft and the spiral external spline, increases the meshing length of the hollow shaft and the spiral external spline, and improves the load-bearing capacity and stability of the starter.

[0060] As an optional implementation, in an embodiment of the invention, see Figure 3 As shown, a driving module 4 is also provided, which is arranged in the shell 1. The driving module 4 is provided with a first driving component 41 and a second driving component. The first driving component 41 is clamped with the large shaft portion 22. The first driving component 41 is used to drive the output shaft 2 to move along the axis toward the straight external spline 21, and the second driving component is used to drive the hollow shaft 3 to rotate to provide rotational power. The first driving component 41 and the second driving component of the present invention cooperate to provide axial ejection and rotational power for the output shaft 2, thereby improving the reliability of the starter.

[0061] As an optional implementation, in an embodiment of the invention, see Figure 3As shown, the first drive component 41 is provided with an electromagnetic coil 411, a moving iron core 412 and a driving part 413, wherein the moving iron core 412 is connected to the electromagnetic coil 411 and the driving part 413, and the driving part 413 is connected to the output shaft 2. The working process of the first drive component 41 is: the power switch is closed, the electromagnetic coil 411 is energized to generate electromagnetic suction to move the moving iron core 412, drive the driving part 413, and thus drive the output shaft 2 to move outward, and after moving a set distance, the first step 221 of the output shaft 2 contacts the end face of the bearing 9, and the movement stops. At this time, the straight external spline 21 of the output shaft 2 is connected to the engine, the main contact of the electromagnetic switch is also connected, the switch coil is short-circuited, and a large current directly enters the inside of the starter to start driving the engine to rotate and ignite successfully. Then, the power switch is turned off, the electromagnetic suction of the electromagnetic coil 411 disappears, the output shaft 2 returns to its original position, and the start is completed. The first drive component of the present invention has a simple structure, stable coordination, and improves the working efficiency of the starter.

[0062] As an optional implementation, in an embodiment of the invention, see Figure 3 As shown, the driving part 413 is provided with a fork 4131 and a fork pin 4132, one end of the fork 4131 is connected to the moving iron core 412, the other end of the fork 4131 is clamped with the output shaft 2, the fork pin 4132 is rotatably connected to the middle part of the fork 4131 and fixed in the housing 1, the electromagnetic coil 411 is energized to move the moving iron core 412, driving the fork 4131 to rotate around the fork pin 4132, the forked part at the tail end of the fork 4131 is clamped on the output shaft 2 of the isolator, and the output shaft 2 is driven to move outward when the fork 4131 rotates. The driving part of the present invention has a simple structure and a stable connection.

[0063] As an optional implementation, in an embodiment of the invention, see Figure 3 and Figure 5 As shown, a slip ring 5 is further provided, the slip ring 5 is sleeved on the outer periphery of the output shaft 2 and is located between the first step 221 and the spiral external spline 23, and the shift fork 4131 is clamped in the slip ring 5. The cross section of the slip ring 5 is an open structure, and the open structure is adapted to the shape of the forked part at the tail end of the shift fork 4131, and in the embodiment of the present invention, the slip ring 5 and the output shaft 2 are detachably connected, and the connection is stable and easy to disassemble.

[0064] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0065] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0066] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A starter isolator, characterized in that: include: A housing (1) having a bearing (9) disposed therein; An output shaft (2) is arranged in the housing (1), the output shaft (2) being provided with a straight external spline (21), a large shaft portion (22) and a spiral external spline (23) in sequence, the large shaft portion (22) being movably connected to the bearing (9), and a first step (221) being provided on the large shaft portion (22); A hollow shaft (3) having a spiral internal spline (31) disposed therein and fully meshing with the spiral external spline (23); When the output shaft (2) is moved along the axis toward the straight external spline (21), the bearing (9) abuts against the first step (221) to limit the moving distance of the output shaft (2).

2. A starter isolator according to claim 1, characterized in that: Also includes: A drive module (4) is arranged in the housing (1), and comprises a first drive assembly (41) and a second drive assembly, wherein the first drive assembly (41) is engaged with the large shaft portion (22), the first drive assembly (41) is used to drive the output shaft (2) to move along the axis in the direction of the straight external spline (21), and the second drive assembly is used to drive the hollow shaft (3) to rotate.

3. A starter isolator according to claim 2, characterized in that: The first driving component (41) comprises: an electromagnetic coil (411), a moving iron core (412) and a driving part (413); The moving iron core (412) is connected to the electromagnetic coil (411) and the driving part (413), and the driving part (413) is connected to the output shaft (2).

4. A starter isolator according to claim 3, characterized in that: The driving unit (413) comprises: a shift fork (4131), one end of the shift fork (4131) being connected to the moving iron core (412), and the other end of the shift fork (4131) being clamped to the output shaft (2); A shift fork pin (4132), wherein the shift fork pin (4132) is rotatably connected to the middle portion of the shift fork (4131) and is fixed in the housing (1).

5. A starter isolator according to claim 4, characterized in that: Also features: A slip ring (5), wherein the slip ring (5) is sleeved on the outer periphery of the output shaft (2) and is located between the first step (221) and the spiral external spline (23), and the shift fork (4131) is clamped in the slip ring (5).

6. A starter isolator according to claim 5, characterized in that: Also features: A wire retaining ring (6), the large shaft portion (22) is also provided with a first retaining groove (222), the wire retaining ring (6) is sleeved on the first retaining groove (222), and the slip ring (5) is clamped between the first step (221) and the wire retaining ring (6).

7. A starter isolator according to claim 2, characterized in that: The second driving assembly comprises: a motor and a reducer; The reducer is connected to the motor and the hollow shaft (3).

8. The starter isolator according to claim 1, characterized in that: Also features: A gear (7) is provided with a stepped through hole in the gear (7), wherein the stepped through hole comprises a first through hole (71) and a second through hole (72) which is assembled with the straight external spline (21).

9. A starter isolator according to claim 8, characterized in that: Also features: A top tooth spring (8), wherein one end of the large shaft portion (22) close to the straight external spline (21) is also provided with a second step (223), one end of the top tooth spring (8) abuts against the second step (223), and the other end of the top tooth spring (8) abuts against the bottom of the first through hole (71).

10. A starter, characterized in that: A starter isolator comprising the one-way device described in any one of claims 1-9.

Images