Cantilever type internal tooth transmission one-way clutch

Abstract

The invention relates to a cantilever type internal tooth transmission one-way clutch. Comprising a driving gear and a one-way clutch assembly, the one-way clutch assembly comprises an output hollow shaft and a sleeve, one end of the output hollow shaft is sleeved with the driving gear, the other end of the output hollow shaft is arranged in the sleeve, a one-way transmission bearing is arranged between the output hollow shaft and the sleeve, and an inner gear shaft is arranged in the center of the output hollow shaft and the center of the sleeve; a first step, a second step, a third step and a connecting disc are sequentially arranged on the inner gear shaft in the axis direction, the first step and the second step are both arranged in the output hollow shaft in a penetrating mode, the second step is sleeved with an axial positioning assembly, the third step is in meshing transmission connection with the sleeve, an involute gear is arranged on the inner wall of the connecting disc, and a positioning boss is arranged in the center of the connecting disc. The positioning boss is used for positioning the starter, and a starting gear of the starter is in meshing transmission with the involute gear. The device is convenient and simple to assemble, small in size and long in service life.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engine starting, in particular to a one-way clutch for one-way transmission of power and reverse slipping for an internal combustion engine starter, specifically a cantilever internal gear transmission one-way clutch. Background Art

[0002] After years of hard work and exploration, the design and development level of core technologies and key components in the automotive industry has made great breakthroughs, and the structural design has become increasingly advanced and reasonable. With the increasing requirements for energy conservation and environmental protection, the requirements for automobile emissions and energy conservation are getting higher and higher. It is necessary to reduce the volume and weight of our designed products to achieve the goal of reducing energy consumption. At present, the input reduction transmission used by the one-way device for general internal combustion engine starters is a fixed-axis gear reduction transmission, and the one-way clutch mechanism is sleeved in the middle of the drive shaft and supported by the drive shaft as a whole. It has a large volume and low output power. In order to keep up with the development of technology and supporting needs in the internal combustion engine motor and electrical appliance industry, and to adapt to the development trend of small volume, light weight and long life, designing an improved cantilever internal gear transmission is an issue that manufacturers urgently need to solve. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a cantilever type internal gear transmission one-way clutch which is easy to assemble, small in size and has a long service life.

[0004] The technical solution of the present invention is as follows: A cantilever internal gear transmission one-way clutch comprises: a driving gear and a one-way clutch assembly, wherein the one-way clutch assembly comprises: an output hollow shaft and a sleeve, wherein the driving gear is sleeved on one end of the output hollow shaft, and the other end of the output hollow shaft is placed in the sleeve, a one-way transmission bearing is arranged between the output hollow shaft and the sleeve, an internal gear shaft is arranged at the center of the output hollow shaft and the sleeve, a first step, a second step, a third step and a connecting plate are arranged on the internal gear shaft in sequence along the axial direction, the first step and the second step are both inserted into the output hollow shaft, an axial positioning assembly is sleeved on the second step, the third step is meshed and transmission-connected with the sleeve, an involute gear is arranged on the inner wall of the connecting plate, and a positioning boss is arranged at the center, the positioning boss is used for positioning the starter, and the starting gear of the starter meshes and transmits with the involute gear.

[0005] Furthermore, a limiting step is provided at one end of the output hollow shaft, a first retaining ring is provided on the output hollow shaft, and the driving gear is located between the first retaining ring and the limiting step.

[0006] Furthermore, a disc spring is arranged between the driving gear and the limiting step.

[0007] Furthermore, a shaft bushing is provided between the output hollow shaft and the first step.

[0008] Further, the axial positioning assembly includes: a retaining ring sleeve, a second retaining ring and a third retaining ring, the retaining ring sleeve is arranged on the second step, a first arc segment and a second arc segment are arranged in the retaining ring sleeve, the first arc segment is arranged on a side of the second arc segment close to the first step, a positioning groove is arranged on the second step, the second retaining ring is abutted against the first arc segment, and the third retaining ring is abutted against the second arc segment and placed in the positioning groove.

[0009] Furthermore, a cover is sleeved on the sleeve, and an insert is arranged on the inner side of the cover.

[0010] Furthermore, the cover is riveted at the chamfer of the sleeve.

[0011] Furthermore, a square groove is provided on the sleeve, and the square groove is used to connect the shift fork.

[0012] Furthermore, a limiting boss is arranged on the outer wall of the sleeve, and a cover plate is arranged between the limiting boss and the connecting disk.

[0013] Furthermore, an arc-shaped pit is formed at the connection point between the positioning boss and the bottom plane of the connecting plate.

[0014] The beneficial effects of the present invention are as follows: 1. The axial relative positions of the output hollow shaft, the one-way transmission bearing, the insert and the sleeve of the one-way clutch mechanism of the present invention are sleeved on the chamfer of the sleeve by an outer cover and fixed by rivets, which is convenient and simple to assemble, and the connection is firm and the quality is stable.

[0015] 2. When the one-way clutch mechanism moves forward, it is positioned by an axial positioning assembly, which is fixed by a retaining ring sleeve, a second retaining ring and a third retaining ring. The structure is reasonable and advanced, and the positioning is correct, thereby ensuring the correct engagement between the drive gear and the engine, improving the working stability of the one-way clutch, and thus increasing the life of the product.

[0016] 3. The driving gear is equipped with a circular disc spring, which is not easy to hit the teeth when meshing with the engine gear ring, thereby increasing the life of the product.

[0017] 4. The one-way clutch mechanism adopts a cantilever structure. The left end is moved outward from the front end of the internal gear shaft to the outer wall of the output hollow shaft and connected to the inner hole of the motor housing for support. The right end is supported and positioned by the positioning boss in the center of the connecting disk of the internal gear shaft, shortening the axial dimension, thereby achieving the purpose of compact size and small volume.

[0018] 5. A positioning boss is provided at the center of the internal gear shaft connecting disc for radial positioning of the one-way clutch and the starter connecting part. The positioning is reliable and can ensure the relative position of the starter transmission part and the inner hole gear of the internal gear shaft disc body, so that the starter transmission is stable and the noise is low. At the same time, it protects the starter transmission gear, thereby extending the life of the starter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a partially enlarged schematic diagram of the axial positioning component in the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. The described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0022] In an embodiment of the present invention, Figure 1 Schematic diagram of a cantilever internal gear transmission one-way clutch according to the specific structure of the present invention. Figure 1 As shown, the present invention specifically includes: A driving gear 2 and a one-way clutch assembly 4, wherein the one-way clutch assembly 4 comprises: an output hollow shaft 405 and a sleeve 404, wherein the driving gear 2 is sleeved on one end of the output hollow shaft 405, and the other end of the output hollow shaft 405 is placed in the sleeve 404, and a one-way transmission bearing 403 is arranged between the output hollow shaft 405 and the sleeve 404, and an internal gear shaft 9 is arranged in the center of the output hollow shaft 405 and the sleeve 404.

[0023] Among them, the internal gear shaft is a shaft-type part, and the internal gear shaft is provided with a first step 91, a second step 92, a third step 93 and a connecting plate 94 in sequence along the axial direction. The first step 91 and the second step 92 are both smooth cylindrical surfaces, and the first step 91 and the second step 92 are both inserted into the output hollow shaft 405.

[0024] The second step 92 is sleeved with an axial positioning assembly, and the third step 93 is meshed and transmission-connected with the sleeve 404. Specifically, the outer circle of the third step 93 is provided with an involute oblique spline, and the interior of the sleeve 404 is provided with a corresponding involute oblique spline, and the two are meshed with each other to realize the transmission between the third step 93 and the sleeve 404.

[0025] An involute gear 902 is disposed on the inner wall of the connecting disk 94 , wherein the involute gear 902 extends from the right end surface of the connecting disk 94 to the bottom plane 903 of the connecting disk 94 , and there is an arc transition between the involute gear 902 and the bottom plane 903 .

[0026] A positioning boss 904 is provided at the center of the connecting disk 94. The positioning boss 904 is used for positioning the starter. Specifically, the positioning boss 904 is used for radial positioning of the starter connection portion. An arc-shaped pit 906 is formed at the connection between the positioning boss 904 and the bottom plane 903 of the connecting disk 94. The starter gear of the starter is meshed with the involute gear 902 for transmission.

[0027] In one embodiment of the present invention, a limiting step 4051 is provided at one end of the output hollow shaft 405, a first retaining ring 1 is provided on the output hollow shaft 405, and the driving gear 2 is located between the first retaining ring 1 and the limiting step 4051. A disc spring 3 is provided between the driving gear 2 and the limiting step 4051.

[0028] The annular disc spring 3 acts as a buffer when the driving gear 2 is in mesh with the engine gear ring and is impacted. The driving gear 2 is a sleeve-type part, and the inner hole is provided with an involute spline and sleeved on the involute surface of the outer circle of the left end of the output hollow shaft 405. The outer circle of the driving gear 2 is provided with an involute gear matching the engine gear ring. The left end face of the driving gear 2 is against the right end face of the annular first retaining ring 1 embedded in the outer square groove of the left end of the output hollow shaft 405. The first retaining ring is a steel retaining ring.

[0029] In one embodiment of the present invention, the one-way clutch assembly 4 is slidably sleeved on the outer circle of the first step 91 and the involute oblique spline outer circle of the third step 93 of the internal gear shaft 9. The output hollow shaft 405 of the one-way clutch assembly 4 has a bushing 406 disposed between the output hollow shaft 405 and the first step 91. The output hollow shaft 405 is provided with a first inner hole, a second inner hole, a third inner hole and a fourth inner hole from left to right, and the third inner hole is sleeved with a bushing 406 in a sleeve shape, and the inner hole of the bushing 406 is sleeved on the first step 91 of the internal gear shaft 9. The outer circle of the left end of the output hollow shaft 405 is provided with an involute spline and a square retaining ring groove. The involute spline is sleeved with the involute spline of the inner hole of the driving gear 2, and a first retaining ring 1 is embedded in the retaining ring groove. The middle outer circle of the output hollow shaft 405 is a smooth cylindrical surface for radial positioning of the one-way clutch, and the outer circle of the right end is a smooth cylindrical surface and is penetrated into the inner hole of the 403 one-way transmission bearing.

[0030] In one embodiment of the present invention, the center of the sleeve 404 is provided with a first inner hole, a second inner hole, a third inner hole and a fourth inner hole from left to right in sequence, the fourth inner hole is provided with an involute oblique spline, and the involute oblique spline is meshed with the involute oblique spline of the third step 93 of the internal gear shaft 9 for power transmission, the first inner hole, the second inner hole and the third inner hole step are all smooth cylindrical holes, a one-way transmission bearing 403 is provided in the second inner hole, and an insert 402 is provided in the first inner hole. Among them, a square groove 4042 is provided on the outer side of the sleeve 404, and the square groove 4042 is used to connect the shift fork. A limiting boss 4043 is provided on the outer wall of the sleeve 404, and the limiting boss 4043 is placed in the square groove 4042. A cover plate 8 is provided between the limiting boss 4043 and the connecting plate 94. The cover plate 8 is a circular ring part, which is installed in the motor housing and plays a positioning role when the one-way clutch mechanism retreats to the right. The right side of the limiting boss 4043 abuts against the left side of the cover plate 8, the sleeve 404 is sleeved with a cover 401, and an insert 402 is provided inside the cover 401. The cover 401 is riveted at the chamfer 4041 of the sleeve 404. A chamfer 4041 is provided at the intersection of the outer circle of the left end of the sleeve 404 and the left side of the square groove, the sleeve 404 is sleeved with a cover 401, and the insert 402 is a circular ring part.

[0031] In one embodiment of the present invention, Figure 2 As shown, the axial positioning assembly includes: a retaining ring sleeve 6, a second retaining ring 5 and a third retaining ring 7, wherein the retaining ring sleeve 6 is a sleeve-like part, and the outer circle is a smooth cylindrical surface. The retaining ring sleeve 6 is sleeved on the second step 92, and a first arc segment 602 and a second arc segment 601 are arranged in the retaining ring sleeve 6, the first arc segment 602 is arranged on the side of the second arc segment 601 close to the first step 91, and a positioning groove 901 is arranged on the second step 92, and the third retaining ring 7 abuts against the second arc segment 601 and is placed in the positioning groove 901, which prevents the ring sleeve 6 from moving leftward. The second retaining ring 5 abuts against the first arc segment 602, which can prevent the retaining ring sleeve 6 from moving rightward on the one hand, and prevent the third retaining ring 7 from slipping out of the positioning groove 901 on the other hand, so that when the one-way clutch mechanism moves forward, the retaining ring sleeve 6 can effectively play an axial positioning role.

[0032] The working principle of the present invention is as follows: After the starter is powered on, the starter fork connected in the square slot 4042 pushes the one-way clutch assembly 4 forward, thereby driving the drive gear 2 forward, and the drive gear 2 meshes with the engine gear ring. At this time, the main circuit is connected, the starter rotor rotates, and the power is input from the involute gear 902 of the inner gear shaft 9. The inner gear shaft 9 rotates around the center to drive the one-way clutch assembly 4 and the drive gear 2 to rotate, the engine is started, and the starter is powered off. Then the starter fork moves back to drive the one-way clutch assembly 4 and the drive gear 2 backward, completing a starting process.

[0033] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A cantilever internal gear transmission one-way clutch, comprising: A driving gear (2), a one-way clutch assembly (4), wherein the one-way clutch assembly (4) comprises: an output hollow shaft (405), and a sleeve (404), characterized in that the driving gear (2) is sleeved on one end of the output hollow shaft (405), the other end of the output hollow shaft (405) is placed in the sleeve (404), a one-way transmission bearing (403) is arranged between the output hollow shaft (405) and the sleeve (404), an internal gear shaft (9) is arranged at the center of the output hollow shaft (405) and the sleeve (404), and the internal gear shaft is provided with first steps in sequence along the axial direction. (91), a second step (92), a third step (93) and a connecting disk (94), wherein the first step (91) and the second step (92) are both inserted into the output hollow shaft (405), an axial positioning component is sleeved on the second step (92), the third step (93) is meshingly connected with the sleeve (404), an involute gear (902) is arranged on the inner wall of the connecting disk (94), and a positioning boss (904) is arranged at the center, the positioning boss (904) is used for positioning the starter, and the starting gear of the starter is meshingly connected with the involute gear (902) for transmission.

2. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: A limiting step (4051) is provided at one end of the output hollow shaft (405), a first retaining ring (1) is provided on the output hollow shaft (405), and the driving gear (2) is located between the first retaining ring (1) and the limiting step (4051).

3. The cantilever internal gear transmission one-way clutch according to claim 2, characterized in that: A disc spring (3) is arranged between the driving gear (2) and the limiting step (4051).

4. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: A shaft bushing (406) is provided between the output hollow shaft (405) and the first step (91).

5. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: The axial positioning assembly comprises: a retaining ring sleeve (6), a second retaining ring (5) and a third retaining ring (7); the retaining ring sleeve (6) is sleeved on the second step (92); a first arc segment (602) and a second arc segment (601) are arranged in the retaining ring sleeve (6); the first arc segment (602) is arranged on a side of the second arc segment (601) close to the first step (91); a positioning groove (901) is arranged on the second step (92); the second retaining ring (5) abuts against the first arc segment (602); the third retaining ring (7) abuts against the second arc segment (601) and is arranged in the positioning groove (901).

6. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: The sleeve (404) is sleeved with a cover (401), and an insert (402) is provided on the inner side of the cover (401).

7. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: The cover (401) is riveted at the chamfer of the sleeve (404).

8. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: A square groove (4042) is provided on the outer side of the sleeve (404), and the square groove (4042) is used to connect a shift fork.

9. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: A limiting boss (4043) is provided on the outer wall of the sleeve (404), and a cover plate (8) is provided between the limiting boss (4043) and the connecting disk (94).

10. The cantilever internal gear transmission one-way clutch according to claim 1, characterized in that: An arc-shaped recess (906) is formed at the connection point between the positioning boss (904) and the bottom plane (903) of the connection plate (94).

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