An auxiliary starter and its starting mechanism

Abstract

The utility model relates to the field of agricultural machinery especially to an auxiliary starter and starting mechanism thereof, including starting axle, ratchet wheel, starting pawl, one end of starting axle is connected with the volute spring of auxiliary starter, and the other end extends out auxiliary starter casing and is fixedly connected with ratchet wheel; starting pawl is rotatably arranged on casing, and starting pawl is matched with ratchet wheel; still including tightening rocker, the tightening rocker includes hinged part, tightening pawl and starting part, and the tightening rocker is rotatably arranged relative to auxiliary starter casing through hinged part; the tightening pawl can drive ratchet wheel to rotate in starting process. By the rotation of the tightening rocker and the tightening pawl, the ratchet wheel drives the starting axle to rotate, and the volute spring is charged to complete the engine starting. The scheme can realize the operation of the operator to the equipment without bending, is more convenient, and since the foot can be used to start, the operation is more labor-saving and convenient, and the starting efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and in particular to an auxiliary starter and its starting mechanism. Background Technology

[0002] As a major agricultural country, my country has witnessed the widespread use of agricultural machinery due to social and economic development. Most existing agricultural machinery requires an auxiliary starter to start. These auxiliary starters are categorized into hand-cranked and pull-plate starters based on their starting method. Both types require manual operation by the operator.

[0003] For example, Chinese patent CN201711325066.8 discloses a new type of air-cooled diesel engine starter starting mechanism. The operator turns the starter shaft by cranking the handle, which causes the coil spring to contract to achieve elastic energy storage, release the starter plate, and release the elastic potential energy of the coil spring to drive the shaft to rotate and start the engine.

[0004] In practical applications, due to my country's diverse topography, small agricultural machinery is used in mountainous and hilly areas. These machines are low-profile, and the auxiliary starter is also installed low, requiring operators to bend over to start them. Furthermore, many farmers are elderly, and turning the crank handle is inconvenient, placing a greater strain on their bodies from prolonged bending. Secondly, due to common usage habits, turning the crank handle with a hand-cranked auxiliary starter requires a complete and continuous circular motion, with the lower half of the turn requiring more effort than the upper half. Moreover, since hand-cranking relies on the contraction of the coil spring, the resistance increases towards the end of the contraction, requiring greater arm strength from the operator. Therefore, existing technology suffers from inconvenient operation and excessive arm strength requirements. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this utility model is to provide an auxiliary starter and its starting mechanism, thereby solving the problems of inconvenient operation and excessive arm strength requirements in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a starting mechanism for an auxiliary starter, comprising a starting shaft, a ratchet, and a starting pawl. One end of the starting shaft is connected to a coil spring of the auxiliary starter, and the other end extends out of the auxiliary starter housing and is fixedly connected to the ratchet. The starting pawl is rotatably mounted on the housing and engages with the ratchet. The invention is characterized by further comprising a tightening rocker arm, which includes a hinge, a tightening pawl, and a starting part. The tightening rocker arm is rotatably mounted relative to the auxiliary starter housing via the hinge. The tightening pawl can actuate the ratchet during the starting process.

[0007] Furthermore, the upper tensioning rocker arm is mounted on the auxiliary starter housing via a hinge.

[0008] Furthermore, the hinge portion includes a sleeve, which is sleeved on the starter shaft.

[0009] Furthermore, the tightening rocker arm includes a positioning post, and the tightening pawl is rotatably mounted on the tightening rocker arm via the positioning post.

[0010] Furthermore, the tightening pawl includes a positioning part and a limiting part, wherein the limiting part engages or disengages the tightening pawl from the ratchet by cooperating with a limiting member.

[0011] Furthermore, the limiting portion is a recessed portion located on the side near the ratchet, and the limiting member is columnar and located between the limiting portion and the ratchet.

[0012] Furthermore, the limiting part is a shaft, and the limiting member is arc-shaped and located between the limiting part and the ratchet. The curvature of the limiting member on the side closer to the tightening pawl positioning part is greater than that on the other side.

[0013] Furthermore, the upper tensioning rocker arm is equipped with an elastic element.

[0014] Furthermore, it also includes a stop portion, which is disposed on the housing.

[0015] An auxiliary starter is also provided, comprising the starting mechanism of any of the aforementioned auxiliary starters.

[0016] In summary, the advantages of using the technical solution of this utility model compared to traditional technical means are as follows: 1. This solution uses the rotation of the tensioning rocker arm to cause the tensioning pawl to actuate the ratchet, thereby storing energy in the coil spring. This changes the traditional hand-cranking method and eliminates the need for continuous, circumferential rotation of the tensioning rocker arm.

[0017] 2. When continuous, circumferential rotation of the tightening rocker arm is not required, the tightening rocker arm can be stepped on with the foot to cause the tightening pawl to actuate the ratchet. This eliminates the need to bend over, making it more convenient to use.

[0018] 3. The operator stands upright and operates with their feet, which allows for better force exertion and is less strenuous compared to the existing technology of bending over and cranking by hand, thus increasing the success rate of starting. Attached Figure Description

[0019] The foregoing and other objects, features and advantages of this invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0020] Figure 1 This is the overall intent of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the first embodiment of the present invention showing the separation of the tightened pawl and the ratchet. Figure 4 This is a schematic diagram of the engagement between the tightened pawl and the ratchet wheel in the first embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the tightening pawl in the first embodiment of this utility model; Figure 6 This is a schematic diagram of the separation of the tightened pawl and ratchet in the second embodiment of the present invention; Figure 7 This is a schematic diagram of the engagement between the tightened pawl and the ratchet wheel in the second embodiment of this utility model.

[0021] The following are the labels: housing 100; starter shaft 200; ratchet 300; starter pawl 400; tightening rocker arm 500; hinge 510; tightening pawl 520; starter 530; sleeve 511; positioning pin 540; positioning part 521; limiting part 522; limiting element 600; stop part 700. Detailed Implementation

[0022] The following embodiments of this utility model serve as inspiration. Through the following description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The scope of protection of this utility model is not limited to the contents of the claims and description.

[0023] The present invention will be further described with reference to the following figures: like Figure 1 , Figure 2 As shown, an auxiliary starter's starting mechanism includes a starter shaft 200, a ratchet 300, and a starter pawl 400. One end of the starter shaft 200 is connected to a coil spring of the auxiliary starter, meaning the starter shaft 200 can drive the coil spring to contract and store energy, and the coil spring can also drive the starter shaft 200 to rotate when it releases energy. The other end extends out of the auxiliary starter housing 100 and is fixedly connected to the ratchet 300, meaning the starter shaft 200 and the ratchet 300 are relatively fixed together.

[0024] The starter pawl 400 is rotatably mounted on the housing 100 and engages with the ratchet 300. Specifically, during the spring charging process, when the ratchet 300 rotates and drives the starter shaft 200 to rotate, the starter pawl 400 prevents the ratchet 300 from reversing. When it is necessary to release the elastic potential energy of the spring, simply release the starter pawl 400, and the spring releases its elastic potential energy, driving the starter shaft 200 to rotate and start the engine.

[0025] The tensioning rocker arm 500 includes a hinge portion 510, a tensioning pawl 520, and an actuation portion 530. The actuation portion 530 may be a foot pedal, a crossbar, etc., which are not shown in the attached drawings.

[0026] The tensioning rocker arm 500 is rotatably mounted relative to the auxiliary starter housing 100 via a hinge portion 510; specifically, it can be mounted on the auxiliary starter housing 100 via the hinge portion 510 or mounted on the starter shaft 200 via the hinge portion 510. The tensioning rocker arm 500 can be mounted on the housing 100 via a pin or similar means. When the tensioning rocker arm 500 is mounted on the starter shaft 200, the hinge portion 510 includes a sleeve 511, which is sleeved on the starter shaft 200.

[0027] The tightening pawl 520 includes a positioning part 521, which can be inserted between the teeth of the ratchet 300 and can rotate the ratchet 300 during the start-up process.

[0028] The tensioning rocker arm 500 also includes a positioning pin 540, and the tensioning pawl 520 is rotatably mounted on the tensioning rocker arm 500 via the positioning pin 540. Because the ratchet 300 involves both forward and reverse rotation, the charging time varies each time it is used, and the coil spring also undergoes elastic deformation over time, resulting in different angles of the ratchet 300 teeth when the ratchet 300 stops. The rotatable design of the tensioning pawl 520 allows it to adjust its posture during engagement with the ratchet 300, achieving a better match. Simultaneously, the rotatable design of the tensioning pawl 520 also allows it to adjust its posture during engagement and disengagement with the ratchet 300, reducing friction and wear, and thus extending the product's service life to some extent.

[0029] The principle of this solution is as follows: The foot pedal of the tensioning rocker arm 500 causes it to rotate, with a rotation stroke of one-quarter to one-half a circumference. The tensioning rocker arm 500 drives the tensioning pawl 520 to rotate. During the rotation of the tensioning pawl 520, the positioning part 521 inserts into the teeth of the ratchet 300, causing the ratchet 300 to rotate. The ratchet 300 then drives the starting shaft 200 to rotate, which in turn causes the coil spring to retract. Lifting the foot causes the tensioning rocker arm 500 to return to its original position. During this process, the positioning part 521 of the tensioning pawl 520 disengages from the ratchet 300 under the influence of the tensioning rocker arm 500. At this point, the starting pawl 400 engages with the ratchet 300, allowing the ratchet 300 to rotate forward but not backward, thus preventing the release of coil spring energy. After the tensioning rocker arm 500 returns to its original position, the foot pedal is used again to cause it to rotate, repeating the above process until the coil spring is fully charged. After the power is fully charged, the rocker arm 500 returns to its original position, disengaging the pawl 520 from the ratchet 300, and the starter pawl 400 opens, disengaging from the ratchet 300. At this point, the coil spring releases energy, and under its action, the starter shaft 200 rotates, starting the engine.

[0030] like Figures 3 to 5 As shown, to further improve the fit, the tightening pawl 520 also includes a limiting part 522. The limiting part 522 engages or disengages the tightening pawl 520 from the ratchet 300 through its engagement with the limiting member 600. Specifically, in Embodiment 1, the limiting part 522 is a recessed portion located near the ratchet 300, and the limiting member 600 is columnar and located between the limiting part 522 and the ratchet 300. When activated, the tightening rocker arm 500 rotates downward, and the tightening pawl 520 also rotates downward. The protruding portion at the left end of the limiting part 522 contacts the limiting member 600, causing the tightening pawl 520 to adjust its clockwise rotation posture, prompting the positioning part 521 of the tightening pawl 520 to engage with the ratchet 300 more quickly. When the tensioning rocker arm 500 rotates upward, the tensioning pawl 520 also moves upward, and the right end protrusion of the limiting part 522 contacts the limiting member 600, causing the positioning part 521 of the tensioning pawl 520 to separate from the ratchet 300 more quickly.

[0031] like Figure 6 , Figure 7As shown in Embodiment 2, the limiting part 522 is a shaft, and the limiting part 600 is arc-shaped and located between the limiting part 522 and the ratchet 300. The curvature of the limiting part 600 near the positioning part 521 of the tightening pawl 520 is greater than that of the other side. When activated, the tightening rocker arm 500 rotates downward, and the tightening pawl 520 also rotates downward. The limiting part 522 slides on the arc-shaped limiting part 600. Due to the greater curvature near the positioning part 521, the tightening pawl 520 has a clockwise rotational adjustment posture, causing the positioning part 521 of the tightening pawl 520 to engage with the ratchet 300 more quickly. When the tightening rocker arm 500 rotates upward, the tightening pawl 520 also moves upward, and the limiting part 522 slides on the arc-shaped limiting part 600. Due to the change in curvature, the positioning part 521 of the tightening pawl 520 separates from the ratchet 300 more quickly.

[0032] In order to keep the position of the tensioning rocker arm 500 stable and / or to allow the tensioning rocker arm 500 to return to its original position, the tensioning rocker arm 500 is provided with an elastic element.

[0033] It also includes a stop 700, which is disposed on the housing 100. The stop 700 is used to limit the return distance of the tightening rocker arm 500. Additionally, the stop 700 can also be used to limit the posture of the tightening pawl 520. Specifically, during the return process of the tightening rocker arm 500, the tightening pawl 520 returns to its original position, i.e., rotates counterclockwise in the view. During the continuous rotation of the tightening pawl 520, the end of the tightening pawl 520 near the stop 700 contacts the stop 700, while the other side of the tightening pawl 520 swings around this end, causing the tightening pawl 520 to separate from the ratchet.

[0034] An auxiliary starter includes the starting mechanism of the aforementioned auxiliary starter.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A starting mechanism for an auxiliary starter, comprising a starting shaft (200), a ratchet (300), and a starting pawl (400), wherein one end of the starting shaft (200) is connected to a coil spring of the auxiliary starter, and the other end extends out of the auxiliary starter housing (100) and is fixedly connected to the ratchet (300); the starting pawl (400) is rotatably mounted on the housing (100), and the starting pawl (400) cooperates with the ratchet (300); characterized in that, It also includes a tightening rocker arm (500), which includes a hinge (510), a tightening pawl (520) and an actuation part (530). The tightening rocker arm (500) is rotatably disposed relative to the auxiliary starter housing (100) via the hinge (510). The tightening pawl (520) can actuate the ratchet (300) to rotate during the start-up process.

2. The starting mechanism of an auxiliary starter according to claim 1, characterized in that, The upper rocker arm (500) is mounted on the auxiliary starter housing (100) via a hinge (510).

3. The starting mechanism of an auxiliary starter according to claim 1, characterized in that, The hinge (510) includes a sleeve (511) which is fitted onto the starter shaft (200).

4. The starting mechanism of an auxiliary starter according to any one of claims 1-3, characterized in that, The tightening rocker arm (500) includes a positioning post (540), and the tightening pawl (520) is rotatably mounted on the tightening rocker arm (500) via the positioning post (540).

5. The starting mechanism of an auxiliary starter according to claim 4, characterized in that, The tightening pawl (520) includes a positioning part (521) and a limiting part (522). The limiting part (522) engages or disengages the tightening pawl (520) from the ratchet (300) by cooperating with the limiting member (600).

6. The starting mechanism of an auxiliary starter according to claim 5, characterized in that, The limiting part (522) is a recessed part located on the side near the ratchet (300), and the limiting member (600) is columnar and located between the limiting part (522) and the ratchet (300).

7. The starting mechanism of an auxiliary starter according to claim 5, characterized in that, The limiting part (522) is a shaft, and the limiting part (600) is arc-shaped and located between the limiting part (522) and the ratchet (300). The curvature of the limiting part (600) on the side near the tightening pawl (520) positioning part (521) is greater than that on the other side.

8. The starting mechanism of an auxiliary starter according to claim 1, characterized in that, The upper rocker arm (500) is provided with an elastic element.

9. The starting mechanism of an auxiliary starter according to claim 8, characterized in that, It also includes a stop (700) disposed on the housing (100).

10. An auxiliary starter, characterized in that, The starting mechanism includes the auxiliary starter as described in any one of claims 1 to 9.

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