One-way control device of engine starter and engine starter

Abstract

The utility model provides a one-way control device of an engine starter and the engine starter, and belongs to the technical field of starters. The problem that an existing engine starter is low in starting success power is solved. The engine starter comprises an outer shell, a connecting shell connected with the outer shell in a buckled mode and a one-way control device, a stress shaft is rotationally matched in the connecting shell, the part, stretching out of the connecting shell, of the stress shaft is provided with a starting claw assembly, a main shaft is rotationally matched in the outer shell, and an energy storage assembly is arranged between the main shaft and the outer shell. The outer shell is provided with a driving assembly used for driving the main shaft to rotate. The engine is started softly by finding an upper starting point of the engine, the starting success rate is high, the structural reliability is high, and the stable working time is long.

Description

TECHNICAL FIELD

[0001] The utility model belongs to starter technical field relates to a one-way control device and engine starter of engine starter. BACKGROUND

[0002] The existing engine starter is divided into the following kinds:

[0003] The hand-pull starter finds the starting point of the engine by repeatedly pulling the rope, and then rapidly pulls the rope to produce the burst force to start the engine. The operator of this starter is laborious, and the starting success efficiency is low, and there is a safety risk of reverse rotation of the engine without starting.

[0004] The pull-free starter tightens the spring by rotating the gear, and then reverses to make the starting claw extend into the square hole of the engine starting cup to release the spring to forcibly start the engine. This starter cannot find the starting point of the engine, and forcibly starting the engine can reduce the service life of the engine, the starting success efficiency is not high, and the tightening of the spring and the reversal have serious safety hazards to the operator, and the working time of the starter is short.

[0005] The hand-shake starter tightens the spring by rotating the handle, and then releases the spring to forcibly start the engine, and at the same time, the starting claw extends into the square hole of the engine starting cup. Since the starting point of the engine cannot be found, the release of the spring and the extension of the starting claw seriously reduce the service life of the starting cup and the engine, the starting success efficiency is not high, and the working time of the starter is short. INVENTION CONTENTS

[0006] The utility model aims at the above problems existing in the prior art, and provides a one-way control device of an engine starter which can improve the starting success rate.

[0007] A kind of engine starter including the one-way control device is also provided.

[0008] The utility model can be realized by the following technical schemes:

[0009] The one-way control device of the engine starter comprises a main shaft and a force receiving shaft coaxially arranged with the main shaft, a ratchet one is coaxially fixed on the main shaft, a control claw is arranged on the force receiving shaft, and the control claw is clamped into the tooth part of the ratchet one under the action of a spring.

[0010] Since the one-way control device composed of the ratchet one, the control claw and the spring is arranged between the main shaft and the force receiving shaft, the force receiving shaft can be driven to rotate when the main shaft releases energy, and the force receiving shaft will not rotate when the main shaft rotates in the opposite direction.

[0011] Among them, the control claw has at least two and is distributed in an annular array along the main shaft.

[0012] In the one-way control device of the engine starter, the force receiving shaft is provided with a shaft hole, the shaft hole is provided with a mounting cavity at one end close to the main shaft, the mounting cavity is provided with the ratchet wheel I, the control claw and the spring, the main shaft is coaxially provided with a small shaft at one end close to the force receiving shaft, the small shaft is rotationally matched with the shaft hole after penetrating through the mounting cavity, and the ratchet wheel I is fixed on the small shaft. The hole diameter of the mounting cavity is larger than the hole diameter of the shaft hole, and the mounting cavity provides mounting space for the ratchet wheel I, the control claw and the spring.

[0013] In the one-way control device of the engine starter, the mounting cavity is provided with a cover plate at an opening, and the small shaft is rotationally matched with the shaft hole after penetrating through the cover plate and the mounting cavity.

[0014] In the one-way control device of the engine starter, the control claw is rotationally arranged on the side of the mounting cavity opposite to the cover plate through the mounting shaft, and the spring is located between the ring wall of the mounting cavity and the control claw.

[0015] The engine starter comprises an outer shell, a connecting shell connected with the outer shell, and the one-way control device, the force receiving shaft is rotationally matched in the connecting shell, the part of the force receiving shaft extending out of the connecting shell is provided with a starting claw assembly, the main shaft is rotationally matched in the outer shell, an energy storage assembly is arranged between the main shaft and the outer shell, and a driving assembly for driving the main shaft to rotate is arranged on the outer shell.

[0016] The main shaft and the energy storage assembly are arranged in the outer shell, the force receiving shaft and the one-way control device of the engine starter are arranged in the connecting shell, and the outer shell and the connecting shell are assembled through bolts, so that the assembly process is simple, and the entire starter does not need to be removed from the engine during maintenance, so that the maintenance is convenient.

[0017] In the engine starter, the energy storage assembly comprises a tray rotationally sleeved on the main shaft, a torsion spring arranged between the tray and the main shaft, and a one-way structure arranged between the tray and the outer shell, one end of the torsion spring is fixed on the tray, the other end of the torsion spring is fixed on the main shaft, and the one-way structure is in a locked state when the energy storage assembly stores energy.

[0018] The torsion spring is a volute spring. The main shaft rotates counterclockwise when storing energy, and rotates clockwise when releasing energy. When the main shaft rotates clockwise, the tray is driven to rotate clockwise by the torsion spring, and the one-way structure is in a slipping state at this time; when the main shaft rotates counterclockwise, the one-way structure is in a locked state, and the main shaft tightens the torsion spring to complete energy storage.

[0019] Since the tray is rotationally sleeved on the main shaft, and the torsion spring is arranged between the tray and the main shaft, the installation and disassembly are convenient, and the structure is simple, reasonable in design and low in cost.

[0020] In the engine starter, the one-way structure comprises a control block arranged on the outer shell and a plurality of recesses arranged on the tray and distributed in a ring shape along the main shaft, and when the main shaft rotates clockwise, the recesses push the control block to make the control block disengage from the recesses, and when the main shaft rotates counterclockwise, the control block extends into the recesses.

[0021] In the engine starter, the driving assembly comprises a rotating shaft arranged on the outer shell, a driving gear arranged at the inner end of the rotating shaft and a driven gear coaxially arranged on the main shaft, the driving gear is engaged with the driven gear, and a check structure for limiting the rotation of the main shaft during energy storage is further arranged in the outer shell.

[0022] In the engine starter, the check structure comprises a ratchet wheel two coaxially arranged on the main shaft and a pawl connected to the outer shell, and a driving member for making the pawl disengage from the tooth part of the ratchet wheel two during energy release is further arranged in the outer shell.

[0023] In the engine starter, a limiting step is arranged on the force receiving shaft, an axle clamp and a gasket are arranged at the end of the force receiving shaft away from the main shaft, and the starting claw assembly is positioned between the limiting step and the gasket.

[0024] In the engine starter, a sealing ring is arranged between the force receiving shaft and the connecting shell.

[0025] Compared with the prior art, the engine starter has the following advantages:

[0026] The main shaft and the energy storage assembly are arranged in the outer shell, the force receiving shaft and the one-way control device are arranged in the connecting shell, the outer shell and the connecting shell are assembled through bolts, the assembly process is simple, the entire starter does not need to be removed from the engine during maintenance, the maintenance is convenient, the operation is safe and labor-saving, the engine is gently started at the starting point, the success rate of starting is high, the structure has high reliability, and the working time is long. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a sectional view of the one-way control device of the engine starter.

[0028] Figure 2 is a sectional view of the engine starter.

[0029] In the figure, 1 is a main shaft, 2 is a force receiving shaft, 3 is a ratchet wheel one, 4 is a control claw, 5 is a spring, 6 is a mounting cavity, 7 is a small shaft, 8 is a cover plate, 9 is an outer shell, 10 is a connecting shell, 11 is a starting claw assembly, 12 is a tray, 13 is a torsion spring, 14 is a control block, 15 is a rotating shaft, 16 is a driving gear, 17 is a driven gear, 18 is a ratchet wheel two, 19 is a pawl, 20 is a limiting step, 21 is an axle clamp, 22 is a gasket, and 23 is a sealing ring. DETAILED DESCRIPTION

[0030] The utility model discloses the specific embodiment below and further describes the technical scheme of the utility model in conjunction with the drawings, but the utility model is not limited to these embodiments.

[0031] As Figure 1 The unidirectional control device of engine starter shown in the figure, including the main shaft 1 and the force shaft 2 that is coaxial with the main shaft 1 and is rotationally matched arrangement, the main shaft 1 is coaxially fixed with the ratchet wheel one 3, the force shaft 2 is equipped with the control claw 4, the control claw 4 is clamped into the tooth part of ratchet wheel one 3 under the action of a spring 5.

[0032] Because the unidirectional control device of engine starter that is composed of ratchet wheel one 3, control claw 4 and spring 5 is arranged between the main shaft 1 and the force shaft 2, when the main shaft 1 releases energy, can drive the force shaft 2 to rotate together, when the main shaft 1 rotates towards the opposite direction, then will not drive the force shaft 2 to rotate.

[0033] In the embodiment, the control claw 4 has two and is distributed along the annular array of the main shaft 1.

[0034] As Figure 1 Shown, the force shaft 2 is equipped with the axle hole, the axle hole is equipped with the installation cavity 6 in the end close to the main shaft 1, ratchet wheel one 3, control claw 4 and spring 5 are equipped in the installation cavity 6, the main shaft 1 is coaxially equipped with the small shaft 7 in the end close to the force shaft 2, the small shaft 7 is rotationally matched after passing through the installation cavity 6 with the axle hole, ratchet wheel one 3 is fixed on the small shaft 7. The hole diameter of installation cavity 6 is greater than the hole diameter of axle hole, and installation cavity 6 provides installation space for ratchet wheel one 3, control claw 4 and spring 5.

[0035] As Figure 1 Shown, the installation cavity 6 is fixed with the cover plate 8 at the opening, and the small shaft 7 is rotationally matched with the axle hole after passing through the cover plate 8 with the installation cavity 6. The control claw 4 is rotationally arranged on the side opposite to the cover plate 8 in the installation cavity 6 through the mounting shaft, and the mounting shaft is parallel to the main shaft 1. The spring 5 is a compression spring and is located between the annular wall of the installation cavity 6 and the control claw 4.

[0036] As Figure 2 The engine starter shown in the figure, including the shell body 9, the connecting shell body 10 that is buckled with the shell body 9, and the unidirectional control device of engine starter described above, the upper portion of the shell body 9 has a lower connecting flange, the lower portion of the connecting shell body 10 has an upper connecting flange, a plurality of locking bolts are installed between the upper connecting flange and the lower connecting flange, for connecting the shell body 9 and the connecting shell body 10 together. The upper portion of the connecting shell body 10 is provided with a mounting flange, and the whole composed of the shell body 9 and the connecting shell body 10 is connected to the engine of the mini-tiller through the mounting flange and the bolt. Because the split design is adopted, it is beneficial to the installation of internal parts.

[0037] As Figure 2As shown in the figure, the main shaft 1 is arranged in the outer casing 9 and rotates through the bearing, and extends upward and downward. The force shaft 2 is arranged in the connecting casing 10 and rotates coaxially with the main shaft 1. Two sealing rings 23 are arranged between the force shaft 2 and the connecting casing 10. The lower end of the axial limiting part of the force shaft 2 is abutted against the main shaft 1, so as to realize the axial limiting of the force shaft 2. The starting claw assembly 11 is arranged on the part of the force shaft 2 extending out of the connecting casing 10. The starting claw assembly 11 comprises a rotating disc and two symmetrical flying claws rotatingly arranged in the rotating disc. When the rotating disc rotates clockwise, the flying claws are extended out of the edge of the rotating disc due to the inertia.

[0038] In order to realize the axial positioning of the starting claw assembly 11, as shown in the figure, Figure 1 and Figure 2 the limiting step 20 is arranged on the force shaft 2. The shaft clamp 21 and the washer 22 are arranged above the limiting step 20. The starting claw assembly 11 is axially positioned between the limiting step 20 and the washer 22. In order to limit the circumferential rotation of the starting claw assembly 11 relative to the force shaft 2, the connection part of the force shaft 2 and the starting claw assembly 11 is arranged as a regular polygon. The starting claw assembly 11 is provided with a regular polygon hole matched with the regular polygon.

[0039] As shown in the figure, Figure 2 the rotating shaft 15 is arranged on the outer casing 9 and is parallel to the main shaft 1. The driving gear 16 is arranged on the upper end of the rotating shaft 15 and is located in the outer casing 9. The driven gear 17 is coaxially and fixedly connected to the main shaft 1 and is engaged with the driving gear 16. The driving gear 16 can drive the driven gear 17 to rotate when the driving gear 16 rotates. The outer casing 9 is further provided with a check structure for limiting the rotation of the main shaft 1 during the energy storage, so that the main shaft 1 cannot rotate during the energy storage.

[0040] As shown in the figure, Figure 2 the check structure comprises the ratchet wheel two 18 coaxially and fixedly arranged on the main shaft 1 and the pawl 19 rotatingly connected to the outer casing 9. The pawl 19 is clamped into the tooth part of the ratchet wheel two 18 under the action of the spring elasticity. During the energy storage, the main shaft 1 can only rotate counterclockwise under the action of the ratchet wheel two 18 and the pawl 19. The driving member for making the pawl 19 separate from the tooth part of the ratchet wheel two 18 during the energy release is connected to the pawl 19. In the embodiment, the driving member is the pull wire extending out of the outer casing 9. The pull wire is connected to the free end of the pawl 19. When the pull wire is pulled, the pawl 19 can be driven to move away from the tooth part of the ratchet wheel two 18.

[0041] The energy storage assembly is arranged between the main shaft 1 and the outer casing 9, as shown in the figure, Figure 2As shown, the energy storage assembly comprises a tray 12 rotatably arranged on the main shaft 1, a torsion spring 13 arranged between the tray 12 and the main shaft 1, and a one-way structure arranged between the tray 12 and the outer housing 9. The torsion spring 13 is a spiral spring, one end of which is fixed on the tray 12, and the main shaft 1 has an axially extending groove, the other end of the torsion spring 13 extends into and is fixed in the groove, and the one-way structure is in a locked state when the energy storage assembly stores energy.

[0042] As shown in the figure, Figure 2 The one-way structure comprises a control block 14 rotatably arranged on the outer housing 9 and a plurality of recesses arranged on the lower side of the tray 12 and distributed in a ring shape along the main shaft 1. The control block 14 extends into the recess under the action of a spring force. When the main shaft 1 rotates clockwise, the recess pushes the control block 14 to make the control block 14 disengage from the recess. When the main shaft 1 rotates counterclockwise, the control block 14 extends into the recess.

[0043] When the main shaft 1 rotates clockwise, the tray 12 rotates clockwise under the action of the torsion spring 13, and the one-way structure is in a slipping state at this time. When the main shaft 1 rotates counterclockwise, the one-way structure is in a locked state, and the main shaft 1 tightens the torsion spring 13 to complete energy storage.

[0044] When the rotating shaft 15 rotates counterclockwise, the pawl 19 disengages from the ratchet wheel 2 under the action of the pull wire, the main shaft 1 rotates clockwise under the action of the driving gear 16 and the driven gear 17, the main shaft 1 drives the ratchet wheel 2, the ratchet wheel 1 and the torsion spring 13 to rotate clockwise, the tray 12 rotates clockwise under the action of the torsion spring 13, the control block 14 is in a slipping state at this time, the control claw 4 is clamped into the tooth part of the ratchet wheel 1, thereby driving the force shaft 2 to rotate clockwise, the force shaft 2 drives the starting claw assembly 11 to rotate clockwise, the flying claw extends into the square hole of the engine starting cup, and the flying claw drives the engine shaft to rotate clockwise to find the upper starting point.

[0045] When the rotating shaft 15 rotates clockwise, the main shaft 1 rotates counterclockwise under the action of the driving gear 16 and the driven gear 17, the main shaft 1 drives the ratchet wheel 2, the ratchet wheel 1 and the torsion spring 13 to rotate counterclockwise, the control claw 4 slips with the tooth part of the ratchet wheel 1, the force shaft 2 is stationary, and the flying claw is still inserted into the square hole of the starting cup. The tray 12 rotates counterclockwise under the action of the torsion spring 13, the control block 14 abuts against the recess to make the tray 12 stationary, the torsion spring 13 is tightened, and the pawl 19 is clamped into the tooth part of the ratchet wheel 2 to complete the energy storage before starting the engine.

[0046] Pulling the pull wire makes the pawl 19 disengage from the ratchet wheel 2, the main shaft 1 rotates clockwise under the action of the torsion spring 13, the control block 14 abuts against the recess to make the tray 12 stationary, the main shaft 1 drives the ratchet wheel 1 to rotate clockwise, the control claw 4 is clamped into the tooth part of the ratchet wheel 1, thereby driving the force shaft 2 to rotate clockwise, the force shaft 2 drives the starting claw assembly 11 to rotate clockwise, and the flying claw drives the engine shaft to rotate clockwise to complete the starting.

[0047] In this embodiment, the spring is a compression spring or a torsion spring.

[0048] In other embodiments, the one-way structure comprises a control block 14 rotatably arranged on the lower side of the tray 12 and a plurality of recesses arranged on the outer shell 9 in a ring shape around the main shaft 1, and the control block 14 extends into the recesses under the elastic force of the spring.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A one-way control device for an engine starter, characterized in that, It includes a main shaft (1) and a force-bearing shaft (2) coaxially arranged with the main shaft (1). A ratchet (3) is coaxially fixed on the main shaft (1). A control pawl (4) is provided on the force-bearing shaft (2). The control pawl (4) is engaged with the teeth of the ratchet (3) under the action of a spring (5).

2. The one-way control device for the engine starter according to claim 1, characterized in that, The force-bearing shaft (2) has a shaft hole. The end of the shaft hole near the main shaft (1) has a mounting cavity (6). The ratchet (3), control pawl (4) and spring (5) are located in the mounting cavity (6). The end of the main shaft (1) near the force-bearing shaft (2) has a small shaft (7) coaxially arranged. The small shaft (7) passes through the mounting cavity (6) and rotates with the shaft hole. The ratchet (3) is fixed on the small shaft (7).

3. The one-way control device for the engine starter according to claim 2, characterized in that, The control claw (4) is rotatably mounted in the mounting cavity (6), and the spring (5) is located between the annular wall of the mounting cavity (6) and the control claw (4).

4. An engine starter, characterized in that, Includes the one-way control device as described in any one of claims 1-3.

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