Ratchet automatic control device

Abstract

The utility model provides a ratchet automatic control device, which belongs to the field of mechanical technology. It solves the problem that the existing starter is complicated to operate and has potential safety hazards. It includes a shell, a main shaft and a second shaft, a ratchet is installed on the main shaft, a pawl is rotatably provided on the second shaft, a pull wire is provided on the pawl, a torsion spring one, a third shaft and a second torsion spring are provided on the shell, the first torsion spring acts on the pawl, a pawl control part is rotatably provided on the third shaft, the second torsion spring acts on the pawl control part, a boss one is provided on the pawl control part, a concave surface is provided on the pawl, when the pawl abuts against the pawl control part under the action of the pull wire, the boss one extends into the concave surface under the action of the second torsion spring and locks the pawl, and the shell is also provided with an unlocking structure for disengaging the boss one from the concave surface when the ratchet rotates in the opposite direction to the outward swing of the pawl, when the boss one disengages from the concave surface, the tip of the pawl is clamped into the ratchet under the action of the first torsion spring, and the structure is reasonably designed, easy to maintain, simple to operate and highly safe.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to an automatic ratchet control device. Background Art

[0002] Micro-tillage machines are increasingly widely used for cultivation, sowing and harvesting of rural land. The diesel engine of the micro-tillage machine must be put into operation with the help of a starter before it can work. For example, a diesel engine starter disclosed in a Chinese patent [authorization announcement number is CN203730194U]. When working, it is connected to the pre-tightening end through a crank handle. Turning the crank handle drives the pre-tightening shaft to rotate, the pre-tightening shaft drives the pre-tightening gear to rotate, and the pre-tightening gear drives the driven gear to rotate, thereby driving the rotating shaft to rotate, so that the volute spring stores energy. Under the action of the tension of the tension spring, the fork and the ratchet engage with each other, so that the energy of the volute spring remains unreleased. When the diesel engine needs to be started, the fork is shifted to separate the fork from the ratchet, and the volute spring releases energy. The starting claw on the starting seat is thrown out through the rotating shaft to combine with the diesel engine starting disk, thereby driving the diesel engine flywheel to rotate until the diesel engine starts.

[0003] Since the above starter is not provided with a shift fork control system, when the shift fork unidirectional control is not needed, the shift fork is lifted manually, and when the ratchet needs to be controlled to rotate unidirectionally, the shift fork is manually pulled out of the bar hole, which is complicated to operate and poses a safety hazard. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a ratchet automatic control device which is easy to operate.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The ratchet automatic control device comprises a shell, a main shaft and a second shaft are provided on the shell, a ratchet is mounted on the main shaft, a pawl with a pointed portion is rotatably provided on the second shaft, a pull wire is provided on the pawl, a torsion spring one, a third shaft and a second torsion spring are provided on the shell, the torsion spring one acts on the pawl, a pawl control component is rotatably provided on the third shaft, the second torsion spring acts on the pawl control component, a boss one is provided on the pawl control component, a concave surface is provided on the pawl, when the pawl abuts against the pawl control component under the action of the pull wire, the boss one extends into the concave surface under the action of the second torsion spring and locks the pawl, the shell is also provided with an unlocking structure for disengaging the boss one from the concave surface when the ratchet rotates in the opposite direction to the outward swinging of the pawl, and when the boss one disengages from the concave surface, the tip of the pawl is clamped into the ratchet under the action of the first torsion spring.

[0007] The main shaft is provided with a driven gear located between the ratchet wheel and the housing, and the housing is also provided with a shaft 1, on which a driving gear meshing with the driven gear is installed.

[0008] The free end of the pawl extends between the ratchet and the pawl control member, the pull wire is connected to the free end of the pawl, the torsion spring 1 is arranged between the housing and the pawl and acts on the pawl, the torsion spring 2 is arranged between the housing and the pawl control member and acts on the pawl control member, when the pull wire is pulled outward, the tip of the pawl is separated from the ratchet, until the pawl abuts against the pawl control member, at which time the boss 1 extends into the concave surface under the action of the torsion spring 2, locking the pawl in the current position. When unlocking is required, the driven gear is rotated in the pre-tightening direction, the convex strip 1 is separated from the concave surface under the action of the unlocking structure, the pawl is unlocked, and the tip of the pawl is clamped into the ratchet under the action of the torsion spring 1, so that the ratchet rotates in the pre-tightening direction along with the main shaft.

[0009] In the above-mentioned ratchet automatic control device, the unlocking structure includes an axis four arranged on the outer shell, a control member switch rotatably arranged on the axis four, an action part and a boss two arranged on the control member switch, and a direct pin driven by the ratchet to move the action part. A boss three is provided on the pawl control member, and when the boss two moves the boss three under the action of the direct pin and the action part, the boss one can be disengaged from the concave surface.

[0010] When the driven gear rotates in the pre-tightening direction, the direct pin drives the action part, thereby driving the control switch and boss 2 to rotate, and boss 2 drives boss 3, thereby rotating the pawl control part and boss 1, causing the boss to disengage from the concave surface, and then the pawl rotates around shaft 2 under the action of torsion spring 1, and the tip of the pawl is stuck in the ratchet.

[0011] In the above ratchet automatic control device, a tension spring with one end acting on the control switch is provided on the housing, and the tension spring can reset the control switch when the acting portion is disengaged from the toggle of the direct pin.

[0012] In the above ratchet automatic control device, the control switch is arranged between the pawl and the housing, the boss 1 is arranged opposite to the pawl, and the boss 2 is arranged opposite to the boss 3. That is to say, the boss 3 is located between the boss 1 and the housing.

[0013] In the above ratchet automatic control device, the ratchet has a concave arc surface adapted to the ratchet control member. When the ratchet abuts against the ratchet control member under the action of the wire pull, the ratchet control member is located in the concave arc surface.

[0014] Assuming that the pre-tightening direction of the driven gear is counterclockwise, the working process of the ratchet automatic control device is as follows: pull the wire outward, the wire drives the pawl to rotate clockwise, the tip of the pawl disengages from the ratchet, and when the pawl rotates to the concave arc surface and contacts the pawl control member, the pawl control member rotates clockwise under the action of the second torsion spring, and rotates until the boss 1 extends into the concave surface, and the pawl is locked. The driving gear rotates counterclockwise, and the driving gear drives the driven gear to rotate clockwise. The direct pin fixed on the driven gear toggles the action part of the control switch, causing the control switch to swing counterclockwise, and the boss 2 on the control switch disengages from the boss 3. The driven gear drives the main shaft to rotate clockwise, and the main shaft drives the ratchet to rotate clockwise.

[0015] The driving gear rotates clockwise to drive the driven gear to rotate counterclockwise. The gap of the direct pin fixed on the driven gear toggles the action part of the control switch, causing the control switch to rotate clockwise. The boss 2 on the control switch contacts the boss 3 to push the pawl control member to rotate counterclockwise, and the boss 1 on the pawl control member is separated from the concave surface. The pawl rotates counterclockwise under the action of the torsion spring 1, and the tip of the pawl is stuck in the ratchet. The ratchet rotates counterclockwise, and the tip of the pawl restricts the ratchet from rotating clockwise under the action of the ratchet.

[0016] Compared with the prior art, the ratchet automatic control device has the following advantages: when the driven gear rotates in the pre-tightening direction, the tip of the pawl can automatically engage in the ratchet; when the diesel engine needs to be started, only the pull wire needs to be pulled outward; the structure is reasonably designed, easy to maintain, simple to operate, and highly safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a preferred embodiment provided by the utility model.

[0018] Figure 2 It is a position relationship diagram of the pawl control member and the control member switch.

[0019] In the figure, 1, housing; 2, main shaft; 3, shaft two; 4, driven gear; 5, ratchet; 6, driving gear; 7, pawl; 8, pull wire; 9, torsion spring one; 10, shaft three; 11, pawl control member; 12, torsion spring two; 13, boss one; 14, concave surface; 15, shaft four; 16, control member switch; 17, action part; 18, boss two; 19, direct sales; 20, boss three; 21, tension spring; 22, concave arc surface. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] The ratchet automatic control device is arranged on the housing 1 of the starter. Figure 1As shown, the housing 1 is provided with a main shaft 2, a first shaft and a second shaft 3 which are arranged parallel to each other. The main shaft 2 is located in the middle of the housing 1 and is provided with a driven gear 4 and a ratchet 5. The driven gear 4 is located between the ratchet 5 and the housing 1, and a driving gear 6 which meshes with the driven gear 4 is provided on the first shaft.

[0022] like Figure 1 The ratchet automatic control device shown comprises a pawl 7 rotatably arranged on the second shaft 3, a pull wire 8 arranged on the pawl 7, a torsion spring 19 acting on the pawl 7, a third shaft 10 arranged on the housing 1, a pawl control member 11 rotatably arranged on the third shaft 10, and a torsion spring 2 12 acting on the pawl control member 11. The pawl control member 11 is provided with a boss 13, and the middle part of the pawl 7 is provided with a concave surface 14, which is arranged to face away from the second shaft 3. When the pawl 7 abuts against the pawl control member 11 under the action of the pull wire 8, the boss 13 extends into the concave surface 14 under the action of the torsion spring 2 12 and locks the pawl 7. In order to realize automatic unlocking, the housing 1 is also provided with an unlocking structure for disengaging the boss 13 from the concave surface 14 when the driven gear 4 rotates in the pre-tightening direction. When the boss 13 disengages from the concave surface 14, the tip of the pawl 7 is clamped into the ratchet 5 under the action of the torsion spring 19.

[0023] In this embodiment, the pre-tightening direction of the driven gear 4 is counterclockwise. Figure 1 As shown, the free end of the pawl 7 extends between the ratchet 5 and the pawl control member 11, the pull wire 8 is connected to the free end of the pawl 7, the torsion spring 19 is arranged between the housing 1 and the pawl 7 and acts on the pawl 7, the torsion spring 2 12 is arranged between the housing 1 and the pawl control member 11 and acts on the pawl control member 11, when the pull wire 8 is pulled outward, the tip of the pawl 7 disengages from the ratchet 5 until the pawl 7 abuts against the pawl control member 11, at which time the boss 13 extends into the concave surface 14 under the action of the torsion spring 2 12, locking the pawl 7 in the current position.

[0024] When unlocking is required, the driven gear 4 is rotated in the pre-tightening direction, and the convex strip 1 is separated from the concave surface 14 under the action of the unlocking structure, and the pawl 7 is unlocked. Under the action of the torsion spring 19, the tip of the pawl 7 is engaged with the ratchet 5, so that the ratchet 5 rotates in the pre-tightening direction along with the main shaft 2.

[0025] like Figure 1 and Figure 2 As shown, the unlocking structure includes a shaft 4 15 arranged on the housing 1, a control member switch 16 rotatably arranged on the shaft 4 15, and an action part 17 and a boss 2 18 arranged on the control member switch 16. A straight pin 19 capable of moving the action part 17 is provided on the driven gear 4, and a boss 3 20 is provided on the pawl control member 11. When the boss 2 18 moves the boss 3 20 under the action of the straight pin 19 and the action part 17, the boss 1 13 can be disengaged from the concave surface 14.

[0026] like Figure 1 As shown, the control member switch 16 is arranged between the pawl 7 and the housing 1, and the boss 3 20 is located between the boss 1 13 and the housing 1. When the driven gear 4 rotates in the pre-tightening direction, the straight pin 19 moves the action part 17, thereby driving the control member switch 16 and the boss 2 18 to rotate, and the boss 2 18 moves the boss 3 20 to rotate the pawl control member 11 and the boss 1 13, so that the boss is disengaged from the concave surface 14, and then the pawl 7 rotates around the shaft 2 3 under the action of the torsion spring 1 9, and the tip of the pawl 7 is clamped into the ratchet 5.

[0027] like Figure 1 and Figure 2 As shown, a tension spring 21 is provided on the housing 1 with one end acting on the control switch 16 . When the acting portion 17 is disengaged from the toggle of the straight pin 19 , the tension spring 21 can reset the control switch 16 .

[0028] like Figure 1 As shown, the pawl 7 has a concave arc surface 22 matched with the pawl control member 11 . When the pawl 7 abuts against the pawl control member 11 under the action of the pull wire 8 , the pawl control member 11 is located in the concave arc surface 22 .

[0029] The working process of the ratchet automatic control device is as follows: pull the pull wire 8 outward, the pull wire 8 drives the pawl 7 to rotate clockwise, the tip of the pawl 7 is separated from the ratchet 5, and when the pawl 7 rotates to the point where the concave arc surface 22 contacts the pawl control member 11, the pawl control member 11 rotates clockwise under the action of the torsion spring 2 12, and rotates until the boss 1 13 extends into the concave surface 14, and the pawl 7 is locked. The driving gear 6 rotates counterclockwise, and the driving gear 6 drives the driven gear 4 to rotate clockwise. The straight pin 19 fixed on the driven gear 4 toggles the action part 17 of the control member switch 16, causing the control member switch 16 to swing counterclockwise, and the boss 2 18 on the control member switch 16 is separated from the boss 3 20. The driven gear 4 drives the main shaft 2 to rotate clockwise, and the main shaft 2 drives the ratchet 5 to rotate clockwise.

[0030] The driving gear 6 rotates clockwise to drive the driven gear 4 to rotate counterclockwise. The straight pin 19 fixed on the driven gear 4 moves the action part 17 of the control switch 16 through the gap, so that the control switch 16 rotates clockwise. The boss 2 18 on the control switch 16 contacts the boss 3 20 to push the pawl control member 11 to rotate counterclockwise, and the boss 1 13 on the pawl control member 11 is separated from the concave surface 14. The pawl 7 rotates counterclockwise under the action of the torsion spring 1 9, and the tip of the pawl 7 is clamped into the ratchet 5. The ratchet 5 rotates counterclockwise, and the ratchet 5 is restricted from rotating clockwise under the action of the tip of the pawl 7.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A ratchet automatic control device, characterized in that: The invention comprises a housing (1), wherein the housing (1) is provided with a main shaft (2) and a second shaft (3), wherein a ratchet (5) is mounted on the main shaft (2), wherein a ratchet pawl (7) with a pointed portion is rotatably provided on the second shaft (3), wherein a pull wire (8) is provided on the ratchet pawl (7), wherein a torsion spring (1) (9), a third shaft (10) and a second torsion spring (12) are provided on the housing (1), wherein the torsion spring (1) (9) acts on the ratchet pawl (7), and the third shaft (10) (12) is provided on the ratchet pawl (7). A pawl control member (11) is provided for rotation, the second torsion spring (12) acts on the pawl control member (11), a boss (13) is provided on the pawl control member (11), and a concave surface (14) is provided on the pawl (7). When the pawl (7) abuts against the pawl control member (11) under the action of the pull wire (8), the boss (13) extends into the concave surface (14) under the action of the second torsion spring (12) and locks the pawl (7). The housing (1) is also provided with an unlocking structure for enabling the boss (13) to disengage from the concave surface (14) when the ratchet (5) rotates in the opposite direction to the outward swinging direction of the pawl (7); when the boss (13) disengages from the concave surface (14), the tip of the pawl (7) is engaged with the ratchet (5) under the action of the torsion spring (9); the unlocking structure comprises a shaft (15) provided on the housing (1), a control member (15) provided on the shaft (15) and a control member (15) provided on the shaft (15) for rotating. A control switch (16), an action part (17) and a second boss (18) provided on the control switch (16), and a straight pin (19) driven by a ratchet (5) to move the action part (17); a third boss (20) is provided on the ratchet control part (11); when the second boss (18) moves the third boss (20) under the action of the straight pin (19) and the action part (17), the first boss (13) can be disengaged from the concave surface (14).

2. The ratchet automatic control device according to claim 1, characterized in that: The housing (1) is provided with a tension spring (21) with one end acting on the control switch (16). When the acting portion (17) is separated from the toggle of the straight pin (19), the tension spring (21) can reset the control switch (16).

3. The ratchet automatic control device according to claim 1, characterized in that: The control member switch (16) is arranged between the ratchet (7) and the housing (1), the boss 1 (13) is arranged opposite to the ratchet (7), and the boss 2 (18) is arranged opposite to the boss 3 (20).

4. The ratchet automatic control device according to claim 1, characterized in that: The main shaft (2) is provided with a driven gear (4) located between the ratchet wheel (5) and the housing (1), and the straight pin (19) is arranged on the driven gear (4).

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