CN218325074U

CN218325074U - Clutch type transmission structure in starter

Info

Publication number: CN218325074U
Application number: CN202222177642.1U
Authority: CN
Inventors: 王宏伟; 金介磊; 包中华
Original assignee: Ningbo Zhenhai Jinteng Electrical Equipment Co ltd
Current assignee: Ningbo Zhenhai Jinteng Electrical Equipment Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-01-17
Anticipated expiration: 2032-08-18

Abstract

The clutch type transmission structure in the starter comprises a clutch sleeve, a motor shaft and a driving shaft. The clutch sleeve comprises a connecting transmission part and a clutch part, the connecting transmission part is connected with the output shaft, and the clutch part is connected with the driving shaft. The connecting transmission part is internally provided with a transmission block, and the end face of the output shaft is provided with a transmission chute matched with the transmission block in shape. The transmission block is always positioned in the transmission chute in the moving process of the clutch sleeve. A clutch block is arranged in the clutch part, and a clutch sliding groove matched with the shape of the clutch block is arranged on the driving shaft. The clutch block is separated from the clutch chute when the clutch sleeve moves to the limit position towards the motor direction. Compared with the prior art, the clutch that this application utilized clutch sleeve and drive shaft replaces among the prior art meshing of drive gear and flywheel, can effectively avoid the problem of top tooth and mill tooth to reduce the damage of drive gear and flywheel, improve the life of starter greatly.

Description

Clutch type transmission structure in starter

Technical Field

The utility model belongs to the technical field of automobile starter, separation and reunion formula transmission structure in concretely relates to starter.

Background

Automobile starters are key components of automobile starting systems. The working principle is as follows: the electric energy of the storage battery is converted into mechanical energy, the mechanical energy is transmitted to a gear ring of an engine flywheel through a driving gear of a transmission mechanism, the resistance moment of the engine is overcome, and the engine in a static state is started to enable the automobile to normally run. Wherein, the key of the transmission is to mesh the driving gear and the flywheel. In the traditional technology, the process is realized by controlling the on-off of a circuit of a starter and the meshing and the disengagement of a driving gear and a gear ring by a control mechanism, and mainly comprises the meshing modes such as forced meshing, flexible meshing and the like.

Forced meshing is the most used meshing mode of the existing automobile starter, and the working principle is that a driving gear is pushed to a flywheel for meshing through a shifting fork and other structures. During meshing, if the gear teeth of the driving gear are just aligned with the tooth grooves of the flywheel, the gear teeth are smoothly meshed; if the gear teeth of the driving gear are aligned with the gear teeth of the flywheel, a tooth ejecting phenomenon occurs, and the meshing spring is compressed. When the motor is electrified and rotates, the gear teeth of the driving gear correspond to the tooth grooves of the flywheel after the driving gear rotates by a small angle, and the front top of the driving gear is meshed with the flywheel under the action of the meshing spring. And flexible meshing is that when taking place the apical tooth, drive gear can rotate to can automatic fork and open the apical tooth, make the gear be in the meshing state smoothly all the time.

The above-described engagement method has the following problems: 1. the gear milling phenomenon exists, the gear teeth of the driving gear of the starter can be abutted against the gear teeth of the flywheel, and the tooth top of the driving gear rotates at a high speed along the end face of the gear teeth of the flywheel, so that the flywheel is milled to be damaged, and the driving gear can be damaged. 2. The driving gear and the flywheel are frequently switched between disengagement and engagement, so that severe abrasion is caused, the service life is greatly shortened, and frequent replacement and maintenance are performed.

Accordingly, the present application is directed to further designs and improvements based on certain of the above-identified circumstances in the prior art.

SUMMERY OF THE UTILITY MODEL

To the not enough among the above prior art, the utility model provides a separation and reunion formula transmission structure in starter utilizes the separation and reunion of separation and reunion sleeve and drive shaft to replace the meshing of drive gear and flywheel among the prior art, can effectively avoid a tooth and mill the problem of tooth to reduce the damage of drive gear and flywheel, improve the life of starter greatly.

In order to solve the above technical problem, the present invention solves the above technical problems.

The clutch type transmission structure in the starter comprises a clutch sleeve, an output shaft and a driving shaft. The clutch sleeve comprises a connecting transmission part and a clutch part, the connecting transmission part is connected with the output shaft, and the clutch part is connected with the driving shaft. The connecting transmission part is internally provided with a transmission block, and the end face of the output shaft is provided with a transmission chute matched with the transmission block in shape. The transmission block is always positioned in the transmission chute in the moving process of the clutch sleeve, so that the clutch sleeve and the output shaft are always in a connected state to transmit power. A clutch block is arranged in the clutch part, and a clutch sliding groove matched with the shape of the clutch block is arranged on the driving shaft. The clutch block is separated from the clutch chute when the clutch sleeve moves to the limit position towards the direction of the motor. When the clutch sleeve moves to the limit position towards the motor direction, the driving shaft is disconnected with the output shaft, and when the clutch sleeve moves to the limit position towards the driving gear direction, the driving shaft is connected with the output shaft for transmission.

In a preferred embodiment, the transmission block and the clutch block are in the shape of a cross. The transmission block and the clutch block have enough strength, and the fracture caused by overlarge transmission torque is avoided.

In a preferred embodiment, the side surface of the clutch sliding groove and the end surface of the driving shaft form an arc curved surface transition. So that the clutch block can slide into the clutch chute along the curved surface of the arc line.

In a preferred embodiment, the clutch sliding groove is twisted around the axial direction along the groove depth direction, and the twisting angle is 5-10 degrees. So that the engagement of the clutch block and the clutch chute is tighter.

Compared with the prior art, the method has the following beneficial effects: the clutch type transmission structure in the starter is provided, the clutch of the clutch sleeve and the driving shaft is used for replacing the meshing of the driving gear and the flywheel in the prior art, and the problems of tooth jacking and tooth milling can be effectively solved, so that the damage to the driving gear and the flywheel is reduced, and the service life of the starter is greatly prolonged.

Drawings

Fig. 1 is a perspective view of a starter in an embodiment.

Fig. 2 is a schematic structural diagram of a transmission part of the starter in the embodiment.

Fig. 3 is a perspective view of the structure inside the control sleeve.

Fig. 4 is a perspective view of the structure inside the clutch sleeve.

Fig. 5 is a schematic view of the structure of the motor output shaft portion.

Fig. 6 is a perspective view of the mounting socket.

Fig. 7 is a perspective view of the driving shaft and the driving gear.

Fig. 8 is a structural schematic diagram of the clutch sleeve.

The following are the numerical descriptions in the drawings of the specification:

1. an electric motor; 11. a second fixing hole;

2. an output shaft; 21. a transmission chute; 22. detecting the structure; 221. detecting the convex strips; 222. detecting the groove;

3. an electromagnetic switch; 31. assembling a base; 311. a through hole; 312. a first fixing hole; 313. an abutment flange; 314. a passive adsorption member; 32. a control sleeve; 321. a sleeving end; 322. an active adsorption member; 33. rotating the connecting piece; 34. a return spring; 35. a detection head;

4. a drive shaft; 41. a clutch chute;

5. a drive gear;

6. a clutch sleeve; 61. a transmission block; 62. a clutch block; 63. assembling a groove;

7. and fixing the connecting piece.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, and the embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the drawing shows, just for the convenience of description the utility model discloses and simplified description, consequently can not be understood as the restriction of the utility model. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1 to 8, the novel starter comprises a motor 1, an electromagnetic switch 3 and a driving shaft 4, wherein a driving gear 5 is arranged on the driving shaft 4. The motor 1 and the electromagnetic switch 3 are electrically connected with an external control device.

The application is substantially characterized in that: the electromagnetic switch 3 is mounted on the output shaft 2 of the motor 1. The electromagnetic switch 3 comprises a control sleeve 32 which is sleeved on the output shaft 2 and can move axially, one end of the control sleeve 32 is connected with a clutch sleeve 6, the clutch sleeve 6 comprises a connection transmission part and a clutch part, the connection transmission part is connected with the output shaft 2, and the clutch part is connected with the driving shaft 4. The driving gear 5 is always meshed with a flywheel of an automobile engine, and the clutch sleeve 6 is used for controlling the connection transmission of the output shaft 2 and the driving shaft 4, so that the driving gear 5 is prevented from being abraded due to hard meshing.

Wherein, be equipped with transmission piece 61 in connecting the transmission portion, be equipped with the transmission spout 21 that suits with transmission piece 61 shape on the 2 terminal surfaces of output shaft. The transmission block 61 is always located in the transmission chute 21 during the movement of the clutch sleeve 6, so that the clutch sleeve 6 and the output shaft 2 are always in a connection state to transmit power. A clutch block 62 is arranged in the clutch part, and a clutch chute 41 with a shape matched with that of the clutch block 62 is arranged on the driving shaft 4. The clutch plate 62 is disengaged from the clutch gate 41 when the clutch sleeve 6 is moved to the limit position in the direction of the electric motor 1. When the clutch sleeve 6 moves to the limit position towards the motor 1, the driving shaft 4 is disconnected with the output shaft 2, and when the clutch sleeve 6 moves to the limit position towards the driving gear 5, the driving shaft 4 is connected with the output shaft 2 for transmission.

In a preferred embodiment, the transmission block 61 and the clutch block 62 have a cross-shape, and correspondingly, the transmission link 21 and the clutch link 41 have a cross-shape in cross section. So that the transmission block 61 and the clutch block 62 have sufficient strength to avoid breakage due to excessive transmission torque. In particular, the side surface of the clutch sliding groove 41 and the end surface of the driving shaft 4 are in arc curved surface transition. So that the clutch piece 62 can smoothly enter the clutch chute 41.

The specific structure of the electromagnetic switch 3 in this application is: the device comprises a mounting seat 31, wherein a through hole 311 for the output shaft 2 to pass through is arranged in the mounting seat 31, and the control sleeve 32 is sleeved on the mounting seat 31. The bottom of the assembling seat 31 is provided with a first fixing hole 312, the motor 1 is provided with a second fixing hole 11, the first fixing hole 312 and the second fixing hole 11 are connected through a fixing connecting piece 7 in an assembling mode, the assembling is simple, and the matching is firm. The clutch sleeve 6 is provided with an assembly groove 63, the control sleeve 32 is provided with a rotary connecting piece 33, and the rotary connecting piece 33 is arranged in the assembly groove 63. So that the control sleeve 32 can drive the clutch sleeve 6 to move axially, while avoiding a rotational movement of the clutch sleeve 6 to drive the control sleeve 32.

Preferably, the fixed connecting piece 7 can be a fastening hexagon bolt, and is simple to assemble and disassemble and firm in matching. The rotary connecting piece 33 can be a rolling bearing and can bear a certain axial load, so that the control sleeve 32 is prevented from being in direct contact with the assembling groove 63 and being abraded.

This application electromagnetic switch 3 controls control sleeve 32 through the mode of electro-magnet and spring collocation, and its structure specifically is: the assembling seat 31 is provided with a butt flange 313, the butt flange 313 is provided with a passive adsorption part 314, the control sleeve 32 is provided with a sleeving end 321, and one side of the sleeving end 321 opposite to the butt flange 313 is provided with an active adsorption part 322 corresponding to the passive adsorption part 314. A return spring 34 is mounted between the abutment flange 313 and the socket end 321. The axial movement of the control sleeve 32 and thus the clutch switching of the clutch sleeve 6 is realized by controlling the electromagnetic switch 3.

In particular, the design has detection mechanism on this application, can detect clutch sleeve 6 and whether combine to target in place, and its structure specifically is: the output shaft 2 is provided with a detection structure 22, and the detection structure 22 comprises a detection convex strip 221 and a detection groove 222 which are arranged at intervals. The end face of the assembling seat 31 is provided with a detection head 35 aligned with the detection structure 22. The clutch sliding groove 41 is twisted around the axial direction along the groove depth direction, and the twisting angle is 5-10 degrees. The clutch block 62 is engaged with the clutch chute 41 more tightly, and the design can be matched with the detection structure 22, so that the clutch sleeve 6 can deflect at a certain angle when the clutch block 62 enters the clutch chute 41 to drive the output shaft 2 to deflect, and the detection head 35 detects whether the clutch sleeve 6 is combined in place through the deflection of the detection structure 22.

The working principle of the starter is as follows:

when the automobile is started, the control device firstly sends a signal to the electromagnetic switch 3, the active adsorption piece 322 is electrified and moves to the passive adsorption piece 314 to adsorb the active adsorption piece and the passive adsorption piece, and the control sleeve 32 moves towards the direction of the driving gear 5.

The clutch sleeve 6 is moved by the control sleeve 32 in the direction of the drive gear 5, during which the clutch plate 62 enters the clutch gate 41. Because the clutch chute 41 is twisted around the axial direction along the depth direction of the chute, the clutch sleeve 6 drives the output shaft 2 to deflect, the detection structure 22 deflects, the detection head 35 detects that the detection structure 22 deflects and then sends a signal that the clutch sleeve 6 is combined in place to the control device, the control device sends a starting signal to the motor 1, the motor 1 is started, and the drive gear 5 is driven to rotate through the clutch sleeve 6.

After the automobile is started, the electromagnetic switch 3 is closed, the control sleeve 32 is reset under the action of the reset spring 34, and the clutch sleeve 6 is separated from the driving shaft 4.

Compared with the prior art, the driving shaft 4 connected with the driving gear 5 and the output shaft 2 of the motor 1 are arranged in a separated mode, the driving gear 5 is meshed with the flywheel all the time, the torque transmission between the motor 1 and the driving gear 5 is controlled through the clutch sleeve 6, the gear milling phenomenon is avoided, noise is reduced, abrasion caused by meshing and disengaging switching is reduced, and the service life of the starter is greatly prolonged.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any substitutions, modifications, and improvements that can be easily conceived by those skilled in the art are all within the protection scope of the present invention.

Claims

1. The clutch type transmission structure in the starter is characterized by comprising a clutch sleeve (6), an output shaft (2) and a driving shaft (4); the clutch sleeve (6) is hollow, the clutch sleeve (6) comprises a connecting transmission part and a clutch part, the connecting transmission part is coaxially connected with the output shaft (2), and the clutch part is coaxially connected with the driving shaft (4);

a transmission block (61) is arranged in the connecting transmission part, a transmission chute (21) which is matched with the transmission block (61) in shape is arranged on the end face of the output shaft (2), and the transmission block (61) is always positioned in the transmission chute (21) in the axial movement process of the clutch sleeve (6); a clutch block (62) is arranged in the clutch part, and a clutch sliding groove (41) which is matched with the clutch block (62) in shape is arranged on the driving shaft (4); the clutch block (62) is disengaged from the clutch chute (41) when the clutch sleeve (6) moves to the limit position towards the motor (1).

2. Clutch transmission in a starter according to claim 1, characterized in that the transmission block (61) and the clutch block (62) are cross-shaped.

3. The clutch type transmission structure in the starter according to claim 2, wherein the side surface of the clutch chute (41) and the end surface of the driving shaft (4) are in arc curved surface transition.

4. The clutch transmission structure in a starter according to claim 3, wherein the clutch runner (41) is twisted around an axial direction in a groove depth direction by an angle of 5 ° to 10 °.