Pull disc auxiliary starter and agricultural machine

Abstract

The utility model relates to the field of agricultural machinery, in particular to a pull disc auxiliary starter and agricultural machinery, which comprise a shell, a pull disc, a pawl assembly, a return mechanism and a starting mechanism, the pull disc and the pawl assembly are rotatably arranged in the shell through a central shaft, the pull disc is located between the shell and the pawl assembly, and the return mechanism is located between the shell and the pawl assembly. The pull disc and the pawl assembly are separated, and a friction part is arranged on the contact face of the pull disc and the pawl assembly. The pull disc and the pawl assembly are arranged to be separated, and the friction part is arranged on the contact surface of the pull disc and the pawl assembly, so that the use safety of a product can be improved, meanwhile, the convenience of equipment maintenance is improved, the maintenance cost of the product is saved, and the maintenance safety of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of agricultural machinery, especially to a pull plate auxiliary starter and agricultural machinery. BACKGROUND

[0002] The auxiliary starter is a commonly used device in the field of agricultural machinery, and is mainly used for starting agricultural equipment with diesel or gasoline engines. The auxiliary starter is divided into three types: hand-rotating type, pull plate type and electric starting type.

[0003] However, the existing pull plate type auxiliary starter may fail to start, and the reaction force is fed back to the operator, causing hand injury. For example, in Chinese Invention Patent CN113847180B and Chinese Utility Model Patent CN202832926U, the pull plate rotates around the central shaft by pulling the starting rope, the pawl assembly on the pull plate rotates with it, the coil spring winds during the rotation to store energy, and the pawl swings around the hinge point to open outward and insert into the hole corresponding to the starting cup on the diesel engine to start the engine. When the starting rope is released, the pull plate reverses its rotation around the central shaft under the elastic force released by the coil spring, and the starting rope is retracted onto the pull plate. The difference between the pull plate auxiliary starter and the hand-rotating auxiliary starter is that the hand-rotating auxiliary starter drives the pawl assembly to rotate by releasing the elastic potential energy of the coil spring, and the pawl drives the starting cup. The pull plate type auxiliary starter does not require as much force as the hand-rotating type. Therefore, the pull plate type auxiliary starter requires relatively high force from the operator during starting.

[0004] Since the existing pull plate type auxiliary starter may fail to start, the reaction force is fed back to the operator, causing hand injury. For example, in Chinese Invention Patent CN113847180B and Chinese Utility Model Patent CN202832926U, the pull plate rotates around the central shaft by pulling the starting rope, the pawl assembly on the pull plate rotates with it, the coil spring winds during the rotation to store energy, and the pawl swings around the hinge point to open outward and insert into the hole corresponding to the starting cup on the diesel engine to start the engine. When the starting rope is released, the pull plate reverses its rotation around the central shaft under the elastic force released by the coil spring, and the starting rope is retracted onto the pull plate. The difference between the pull plate auxiliary starter and the hand-rotating auxiliary starter is that the hand-rotating auxiliary starter drives the pawl assembly to rotate by releasing the elastic potential energy of the coil spring, and the pawl drives the starting cup. The pull plate type auxiliary starter does not require as much force as the hand-rotating type. Therefore, the pull plate type auxiliary starter requires relatively high force from the operator during starting. UTILITY MODEL CONTENTS

[0005] To solve the above problems, the utility model provides a pull plate auxiliary starter and agricultural machinery to solve the problem of reaction force feedback to the operator and hand injury caused by the failure of the pull plate type auxiliary starter to start in the prior art.

[0006] To solve the above problems, the utility model adopts the following technical scheme: a pull plate auxiliary starter, comprising a shell, a pull plate, a pawl assembly, a return mechanism, and a starting mechanism, the pull plate and the pawl assembly are rotatably arranged in the shell through a central shaft, and the pull plate is located between the shell and the pawl assembly, characterized in that the pull plate and the pawl assembly are separate, and the contact surface of the pull plate and the pawl assembly is provided with a friction part.

[0007] Further, the friction part includes a first friction part arranged on the pull plate and a second friction part arranged on the pawl assembly, the first friction part and the second friction part are matched by protrusions and protrusions or protrusions and grooves; the pull plate and the pawl assembly are relatively moved in the direction of the central shaft axis based on the matching of the first friction part and the second friction part; the central shaft is further provided with an elastic member, and the elastic member is used for limiting and returning the relative displacement of the pull plate and the pawl assembly.

[0008] Further, the elastic member is located between the pull plate and the shell, and the elastic member includes a fixed end and a sliding end, the sliding end is matched with the pull plate to enable the pull plate to slide in the direction of the central shaft axis.

[0009] Further, the elastic member is located between the pull plate and the pawl assembly, and the elastic member includes a fixed end and a sliding end, the sliding end is matched with the pull plate to enable the pull plate to slide in the direction of the central shaft axis.

[0010] Further, the sliding end of the elastic member is matched with the pull plate by protrusions and grooves.

[0011] Further, the elastic member is located on the pawl assembly, and the elastic member includes a fixed end and a sliding end, the sliding end is matched with the pawl assembly to enable the pawl assembly to slide in the direction of the central shaft axis.

[0012] Further, the matching is gap matching, and the gap of the gap matching is smaller than the maximum distance of the relative displacement of the pull plate and the pawl assembly.

[0013] Further, the elastic member is two, and the elastic member includes a fixed end and a sliding end, the sliding end of one of the elastic members is matched with the pull plate to enable the pull plate to slide in the direction of the central shaft axis, and the sliding end of the other elastic member is matched with the pawl assembly to enable the pawl assembly to slide in the direction of the central shaft axis.

[0014] Further, the matching is gap matching, and the gap of the gap matching is smaller than half of the maximum distance of the relative displacement of the pull plate and the pawl assembly.

[0015] Further, the slope of the friction surface of the first friction part and the second friction part when the pull plate returns is smaller than the slope of the friction surface when starting.

[0016] An agricultural machine includes the pull plate auxiliary starter.

[0017] The technical effect of the utility model is:

[0018] 1. By separating the pull plate and the pawl assembly, the pawl assembly or the pull plate can be replaced individually when damaged, which saves cost compared to the integrated design of the prior art. Secondly, in the prior art, one end of the coil spring is fixed to the pull plate, so when the pawl assembly is damaged, only the corresponding components of the pawl assembly need to be replaced, without the need to disassemble the housing and the pull plate, or remove the coil spring, thus making maintenance more convenient. In addition, if the integrated design of the prior art is followed, the pawl assembly or the pull plate needs to be disassembled when damaged, and the coil spring needs to be removed. After the coil spring is pulled out, it will instantly spring open under the action of the elastic force, which can easily cause harm to the operator or the surrounding crowd. Therefore, the separated design can improve safety during maintenance.

[0019] 2. By providing a friction part between the pull plate and the pawl assembly, the pull plate can transmit power to the pawl assembly through the friction part to start the engine. When a starting failure occurs and the engine does not start normally, the pawl hits the starting cup with a reaction force greater than the friction force of the friction part, causing the pull plate and the pawl assembly to slip. Therefore, the reaction force of the pawl hitting the starting cup will not be fully fed back to the operator's hand, preventing the operator's hand from being injured by the reaction force.

[0020] 3. By providing a protrusion and a protrusion or a protrusion and a groove on the friction part of the pull plate and the pawl assembly, the friction area can be more effectively controlled compared to the friction of the friction surface, achieving the effect of separation. At the same time, by providing a spring on the central shaft, the pull plate or the pawl assembly can be returned. In addition, the elastic force of the spring effectively offsets the friction force, reducing the friction force feedback to the pull plate starter body, reducing the load of the starter body due to friction, and improving the performance and service life of the product.

[0021] 4. By matching the gap between the sliding end of the spring and the pull plate or the pawl assembly, the elastic force of the spring is prevented from being too large, and the resistance of the pull plate return wheel when collecting the rope is prevented from being too large, causing the pull plate to fail to return and the pull rope to fail to be normally collected.

[0022] 5. When the pull plate returns, the slope of the friction surface of the first friction part and the second friction part when the pull plate returns is smaller than the slope of the friction surface when starting, which can further reduce the friction resistance and make the pull plate return normally and the pull rope be normally collected. BRIEF DESCRIPTION OF DRAWINGS

[0023] The foregoing and other objects, features and advantages of the present application will become apparent to those skilled in the art from the following detailed description in conjunction with the accompanying drawings.

[0024] Figure 1 is a top view of the pull plate auxiliary starter of the present application;

[0025] Figure 2The exploded schematic view of the puller auxiliary starter of the utility model is shown in the figure;

[0026] Figure 3 The exploded schematic view of the puller and the pawl assembly of the utility model is shown in the figure;

[0027] Figure 4 The embodiment schematic view of the utility model is shown in the figure;

[0028] Figure 5 The second embodiment schematic view of the utility model is shown in the figure;

[0029] Figure 6 The third embodiment schematic view of the utility model is shown in the figure;

[0030] Figure 7 The M part partial enlarged view of the utility model is shown in the figure; Figure 6

[0031] Figure 8 The friction surface slope schematic view of the friction part of the utility model is shown in the figure.

[0032] The reference signs are as follows: 100, the shell; 200, the puller; 300, the elastic piece; 400, the central shaft; 500, the pawl assembly; 600, the cover plate; 700, the friction part; 310, the fixed end; 320, the sliding end; 410, the first boss; 420, the second boss; 510, the pawl; 520, the pawl disc; 530, the third boss; 710, the first friction part; 720, the second friction part. DETAILED DESCRIPTION

[0033] The following is the enlightenment of the embodiment of the utility model, through the following description, the related ordinary skilled person can make various changes and modifications without deviating from the technical thought of the utility model.

[0034] The utility model is further described with reference to the drawings:

[0035] As Figures 1-2 ​As shown, a kind of pull plate auxiliary starter, including shell 100, pull plate 200, pawl assembly 500, return mechanism, starting mechanism;Pawl assembly 500 includes pawl disc 520, pawl 510, cover plate 600, pawl block is set on the cover plate 600, return mechanism is used to make pull plate 200 return and pull rope recycling, return mechanism can be selected as coil spring.Starting mechanism is used to make pull plate 200 rotate, and can be selected as artificial through pull rope and pull plate 200 rotation, or through electric device, through pull rope and pull plate 200 rotation.Pull plate 200 and pawl assembly 500 are rotatably arranged in shell 100 by center shaft 400, and pull plate 200 is between shell 100 and pawl assembly 500, and pull plate 200 and pawl assembly 500 are separated, i.e.not integrated independent design, and the contact surface of pull plate 200 and pawl assembly 500 is provided with friction part 700.

[0036] The friction mode of friction part 700 can be the mode of friction surface, i.e.by being provided with friction surface on the side of pull plate 200 and pawl assembly 500 contact, and / or being provided with friction surface on the side of pawl assembly 500 and pull plate 200 contact.

[0037] Its implementation principle is that, by starting mechanism, pull plate 200 is driven to rotate, simultaneously, since pull plate 200 is fixedly connected with one end of coil spring, coil spring is also driven to shrink and store energy, and pull plate 200 generates friction force between friction part 700 and pawl assembly 500 in the process of rotation, simultaneously, pawl assembly 500 is also driven to rotate, in the process of rotation of pawl assembly 500, pawl 510 is driven to rotate due to being hinged on pawl disc 520, and pawl 510 is ejected under the action of pawl block on cover plate 600, and is inserted into starting cup, and starting cup drives engine to start.By the above-mentioned operation, the engine is started successfully, and starting mechanism is loosened, and coil spring releases elastic potential energy, and drives pull plate 200 to reverse, and pull rope is recycled to pull plate 200.

[0038] If it fails to start successfully, since the impact force of pawl 510 and starting cup is greater than the friction force of friction part 700, pull plate 200 and pawl assembly 500 appear to slip, i.e.the impact force of pawl 510 and starting cup can be effectively reduced and fed back to operator or electric starting device, to prevent damage to operator or prevent damage to electric starting device.If secondary starting is needed, only the above-mentioned operation needs to be repeated.

[0039] The embodiment not only has the technical effects described above, but also has the following advantages. The pawl assembly 500 and the pull plate 200 are designed in a separated manner, so that the pawl assembly 500 or the pull plate 200 can be replaced individually when damaged, thereby saving cost compared with the integrated design in the prior art. In addition, in the prior art, one end of the coil spring is fixed to the pull plate 200, so that when the pawl assembly 500 is damaged, the corresponding components of the pawl assembly 500 can be replaced without the need to disassemble the housing 100 and the pull plate 200, or to remove the coil spring, thereby improving the convenience of maintenance. In addition, according to the integrated design in the prior art, when the pawl assembly 500 or the pull plate 200 is damaged, the coil spring needs to be disassembled, and after the coil spring is pulled out, it will be instantly opened under the action of the elastic force, which is easy to cause harm to the operator or the surrounding people. Therefore, the separated design can improve the safety during maintenance.

[0040] In the foregoing embodiment, the load caused by friction is entirely fed back to the pull plate 200, the pawl assembly 500, the housing 100 and other components, which increases the wear of the pull plate 200 auxiliary starter and has a certain influence on the service life of the product.

[0041] Therefore, based on the problem, further embodiments are proposed, as shown in Figures 2-7 As shown in the figure, the friction part 700 includes a first friction part 710 arranged on the pull plate 200 and a second friction part 720 arranged on the pawl assembly 500, and the first friction part 710 and the second friction part 720 are matched by a protrusion and a protrusion or a protrusion and a groove. The pull plate 200 and the pawl assembly 500 move relatively based on the axis direction of the central shaft 400 under the cooperation of the first friction part 710 and the second friction part 720. The central shaft 400 is also provided with an elastic member 300, which is used for limiting and returning the relative displacement of the pull plate 200 and the pawl assembly 500.

[0042] Specifically, the protrusions are arranged on the first friction part 710, the protrusions are arranged on the second friction part 720, or the protrusions are arranged on the first friction part 710 and the grooves are arranged on the second friction part 720, or the grooves are arranged on the first friction part 710 and the protrusions are arranged on the second friction part 720, that is, during rotation, the protrusions are in contact with each other and are extruded to cause the relative displacement of the pull ring 200 and the pawl assembly 500; or after the protrusions are separated from the grooves, the protrusions are in contact with the surface and are extruded to cause the relative displacement of the pull ring 200 and the pawl assembly 500. Regarding the relative displacement, the pull ring 200 can be arranged in axial sliding connection on the central shaft 400 and / or the pawl assembly 500 can be arranged in axial sliding connection on the central shaft 400. Through the embodiment, when the resistance generated during the collision of the pawl 510 and the starting cup is greater than the friction force generated by the friction part 700, the displacement of the protrusions is changed, the protrusions are extruded to cause the pull ring 200 and / or the pawl assembly 500 to slide in the axial direction of the central shaft 400, that is, the friction surface of the pull ring 200 and the pawl assembly 500 is reduced, the friction force is reduced, and the phenomenon of relative slipping of the pull ring 200 and the pawl assembly 500 occurs, which prevents the operator from being injured by the reaction force of the pawl 510 colliding with the starting cup when the operator pulls the pull ring 200, and reduces the damage to the electric starting mechanism if the starting mechanism is an electric starting mechanism.

[0043] Of course, only the separation of the pull ring 200 and the pawl assembly 500 can reduce the damage to the starting operator or the electric starting mechanism, and since the engine needs to be started again when it fails to start normally, the pull ring 200 and / or the pawl assembly 500 need to be reset to achieve the engagement of the pull ring 200 and the pawl assembly 500 and the normal transmission of power.

[0044] Therefore, based on the problem, the elastic member 300 is arranged on the central shaft 400, which is used to limit the relative displacement of the pull ring 200 and the pawl assembly 500 by elastic force and also reset the pull ring 200 and the pawl assembly 500 by elastic force. Specifically, when the protrusions are extruded or the protrusions are separated from the grooves, the protrusions are in contact with the surface and are extruded to cause the relative displacement of the pull ring 200 and the pawl assembly 500, the elastic member 300 provides resistance by elastic deformation to limit the distance of the relative displacement of the pull ring 200 and the pawl assembly 500. In addition, when the engine starts successfully or needs to be started again, the pull ring 200 and the pawl assembly 500 need to be reset to achieve engagement after the pawl 510 is separated from the starting cup, and therefore, the pull ring 200 and / or the pawl assembly 500 are reset to achieve the engagement state based on the elastic force of the elastic member 300.

[0045] Regarding the specific position relationship of the arrangement of the elastic member 300, the following several ways can be used:

[0046] The elastic member 300 includes a fixed end 310 and a sliding end 320. Since the elastic member 300 is arranged on the central shaft 400, the fixed end 310 is arranged on the central shaft 400, so that the fixed end 310 of the elastic member 300 is fixedly arranged relative to the central shaft 400. Of course, as to the fixed end 310 of the elastic member 300 arranged on the central shaft 400, it can be absolutely fixed, i.e. directly fixed on the central shaft 400, or relatively fixed, i.e. the fixed end 310 of the elastic member 300 is relatively fixed on the central shaft 400 through the cooperation of the positions and mechanism relationships between the components.

[0047] The elastic member 300 is located between the pull disc 200 and the shell 100. As shown in Figure 4 The sliding end 320 cooperates with the pull disc 200, so that the pull disc 200 slides in the axial direction of the central shaft 400. Specifically, a gasket can be arranged on the sliding end 320 of the elastic member 300, so that the gasket contacts the pull disc 200, and under the elastic force of the elastic member 300, the pull disc 200 slides in the axial direction of the central shaft 400. Of course, other ways including a table top and the like can be used to realize the contact between the sliding end 320 of the elastic member 300 and the pull disc 200, which should also be understood as the same or equivalent solutions of the present embodiment.

[0048] The elastic member 300 is located between the pull disc 200 and the ratchet assembly 500. As shown in Figure 5As shown, the sliding end 320 cooperates with the pull plate 200 to make the pull plate 200 slide in the axial direction of the central shaft 400. Specifically, the pawl assembly 500 is rotatably arranged on the central shaft 400 and is limited at the upper end by the first boss 410 of the central shaft 400. The lower end of the pawl assembly 500 is arranged with the pull plate 200, which is rotatably arranged on the central shaft 400. The friction part 700 between the pull plate 200 and the pawl assembly 500 is arranged with a displacement interval. The elastic member 300 is arranged on the central shaft 400 and located between the pawl assembly 500 and the pull plate 200. The fixed end 310 of the elastic member 300 abuts against the pawl assembly 500, and the sliding end 320 of the elastic member 300 cooperates with the pull plate 200. The specific cooperation mode can be a clamping groove cooperation mode, a hook cooperation mode, etc. As shown in the figure, the clamping groove cooperation mode can be that a disc is arranged at the sliding end 320 of the elastic member 300, the side surface of the disc is slotted, a protrusion is arranged on the pull plate 200, and the protrusion cooperates with the groove. When the impact force of the pawl 510 and the starting cup is greater than the friction force of the friction part 700, the pull plate 200 can be displaced downward under the extrusion of the friction part 700 between the pull plate 200 and the pawl assembly 500, so as to realize the relative displacement of the pull plate 200 and the pawl assembly 500. The sliding end 320 of the elastic member 300 cooperates with the pull plate 200, so as to realize the limiting function. At the same time, when the starting is successful or needs to be started again, the elastic force of the elastic member 300 pulls the pull plate 200 back through the sliding end 320, so as to realize the engagement of the pull plate 200 and the pawl assembly 500. For the fixed end 310, the present embodiment is relatively fixed, that is, the fixed end 310 abuts against the pawl assembly 500 through the elastic force of the elastic member 300. Of course, the fixed end 310 of the elastic member 300 can also be directly fixed on the central shaft 400 to realize the fixation.

[0049] The elastic member 300 is located at the other end of the pawl assembly 500 relative to the pull plate 200. Figure 6 Figure 7As shown, in particular, the elastic member 300 is arranged on the central shaft 400, and the fixed end 310 is fixed on the central shaft 400 by the cover plate 600, so as to be fixed relative to the central shaft 400, or the elastic member 300 is directly fixed on the central shaft 400, or the fixed end 310 is fixed on the central shaft 400 by other components. The sliding end 320 cooperates with the pawl assembly 500, and in particular, a third boss 530 is arranged on the side of the pawl assembly 500 which is close to the central shaft 400, and the boss can be an annular boss. When the pawl 510 collides with the starting cup with excessive impact force, the pull plate 200 is extruded on the friction part 700 of the pawl assembly 500, and the pawl assembly 500 is displaced relative to the pull plate 200 along the axis of the central shaft 400, at this time, the third boss 530 of the pawl assembly 500 gives pressure to the elastic member 300, so that the elastic member 300 is elastically deformed, and the pull plate 200 and the pawl assembly 500 slip, so as to protect the operator's hand or the electric starting device. When the pawl assembly 500 needs to be reset, the elastic member 300 gives elastic force to the pawl assembly 500, so that the pawl assembly 500 is engaged with the pull plate 200.

[0050] As shown, Figure 7 In order to improve the starting efficiency and prevent the friction part 700 from being easily separated, a first boss 420 is arranged on the central shaft 400, the first boss 420 is located on the side of the sliding end 320 of the elastic member 300 which is opposite to the fixed end 310, and the first boss 420 abuts against the sliding end 320, the first boss 420 cooperates with the fixed end 310 of the elastic member 300, so that the elastic member 300 is in a compressed state, when the friction part 700 is extruded, and the pull plate 200 and the pawl assembly 500 are relatively moved, the third boss 530 of the pawl assembly 500 extrudes the sliding end 320 of the elastic member 300, so that the elastic force of the elastic member 300 acts on it, and since the original state of the elastic member 300 is a compressed state, the friction part 700 is not easily separated, so that the first friction part 710 and the second friction part 720 still maintain a certain engagement state, and try to continue to start the engine. When the pawl 510 collides with the starting cup with excessive impact force, the third boss 530 of the pawl assembly 500 continuously compresses the elastic member 300, so that the pull plate 200 and the pawl assembly 500 slip, so as to protect the operator or the electric starting mechanism.

[0051] The sliding end 320 of the elastic element 300 described above engages with the pull plate 200 or the pawl assembly 500 in a clearance fit. This means that when the pawl assembly 500 or the pull plate 200 is not compressing or stretching the elastic element 300, the sliding end 320 does not directly contact the pull plate 200 or the pawl assembly 500; there is a certain gap between the sliding end 320 and the pull plate 200 or the pawl assembly 500. This gap is less than the maximum relative displacement distance between the pull plate 200 and the pawl assembly 500. This addresses the problem that when there is no gap, the pressure generated by the friction part 700 between the pull plate 200 and the pawl assembly 500 causes the elastic element 300 to exert a reaction force, resulting in excessive pressure on the pull plate 200, preventing the pull plate 200 from returning to its normal position, and preventing the pull rope from retracting properly. Of course, the gap cannot exceed the relative displacement distance between the pull plate 200 and the pawl assembly 500. When the gap is greater than the relative displacement distance between the pull plate 200 and the pawl assembly 500, the displacement generated during the compression process between the first friction part 710 and the second friction part 720 cannot cause the elastic element 300 to generate a reaction force, resulting in the pull plate 200 being unable to achieve secondary engagement for return.

[0052] Alternatively, there can be two elastic elements 300. One elastic element 300 has its sliding end 320 engaging with the pull plate 200 to allow the pull plate 200 to slide along the central axis 400. The other elastic element 300 has its sliding end 320 engaging with the pawl assembly 500 to allow the pawl assembly 500 to slide along the central axis 400. This combines the aforementioned configuration where the elastic element 300 is located between the pull plate 200 and the pawl assembly 500, or between the pull plate 200 and the pawl assembly 500, with a configuration where the elastic element 300 is located at the other end of the pawl assembly 500 relative to the pull plate 200. It should be noted that in this clearance fit configuration, the clearance is less than half the maximum relative displacement distance between the pull plate 200 and the pawl assembly 500. That is, both the pull plate 200 and the pawl assembly 500 will slide; therefore, the clearance needs to be reduced to half the displacement range of the pull plate 200 and the pawl assembly 500.

[0053] In order to further reduce the friction of the friction part 700 during the return process of the pull plate 200, making it easier for the pull plate 200 to return and the pull rope to be retracted, the slope of the friction surface of the first friction part 710 and the second friction part 720 during the return of the pull plate 200 can be set to be less than the slope of the friction surface during startup.

[0054] Specifically, such as Figure 8 As shown, taking A and B as the contact surfaces during return and C and D as the contact surfaces during startup as an example, the slope 'a' of the contact surfaces A and B is less than the slope 'b' of the contact surfaces C and D. That is, when 'a' is less than 'b', the friction force of the friction part 700 is relatively small, which is more conducive to the return of the pull plate 200.

[0055] An agricultural machine comprising the draw plate assisted starter of any one of the preceding claims.

[0056] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that the persons skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A kind of pull plate auxiliary starter, including shell (100), pull plate (200), pawl assembly (500), return mechanism, starting mechanism, the pull plate (200) and pawl assembly (500) are rotatably arranged in shell (100) by center shaft (400), and pull plate (200) is between shell (100) and pawl assembly (500), it is characterized in that, The puller (200) is separated from the pawl assembly (500), and a friction part (700) is arranged on the contact surface of the puller (200) and the pawl assembly (500), the friction part (700) comprises a first friction part (710) arranged on the puller (200) and a second friction part (720) arranged on the pawl assembly (500), and the first friction part (710) and the second friction part (720) can move relative to each other along the axis of the central shaft (400).

2. A starter aid as claimed in claim 1, characterized in that: The central shaft (400) is further provided with an elastic member (300) for limiting and / or returning the relative displacement of the puller (200) and the pawl assembly (500).

3. A starter aid as claimed in claim 2, wherein the body is formed from a material which is resiliently deformable. The elastic member (300) is located between the puller (200) and the shell (100), and the elastic member (300) comprises a fixed end (310) and a sliding end (320), the sliding end (320) is matched with the puller (200) to make the puller (200) slide along the axis of the central shaft (400).

4. A starter aid as claimed in claim 2, wherein: The elastic member (300) is located between the puller (200) and the pawl assembly (500), and the elastic member (300) comprises a fixed end (310) and a sliding end (320), the sliding end (320) is matched with the puller (200) to make the puller (200) slide along the axis of the central shaft (400).

5. A starter aid as claimed in claim 4, wherein the body is formed from a single piece of material. The sliding end (320) of the elastic member (300) is matched with the puller (200) through a protrusion and a groove.

6. A starter aid as claimed in claim 2, wherein The elastic member (300) is located on the pawl assembly (500), and the elastic member (300) comprises a fixed end (310) and a sliding end (320), the sliding end (320) is matched with the pawl assembly (500) to make the pawl assembly (500) slide along the axis of the central shaft (400).

7. A starter aid as claimed in any one of claims 3 to 6, wherein, The matching is a clearance fit, and the clearance of the clearance fit is smaller than the maximum distance of the relative displacement of the puller (200) and the pawl assembly (500).

8. A starter aid as defined in claim 2, wherein The elastic member (300) is two, and the elastic member (300) comprises a fixed end (310) and a sliding end (320), one of the sliding ends (320) of the elastic member (300) is matched with the puller (200) to make the puller (200) slide along the axis of the central shaft (400), and the other sliding end (320) of the elastic member (300) is matched with the pawl assembly (500) to make the pawl assembly (500) slide along the axis of the central shaft (400), and the matching is a clearance fit, and the clearance of the clearance fit is smaller than half of the maximum distance of the relative displacement of the puller (200) and the pawl assembly (500).

9. A starter aid as defined in claim 2, wherein The slope of the friction surface of the first friction part (710) and the second friction part (720) when the puller (200) returns is smaller than the slope of the friction surface when it is started.

10. An agricultural machine characterized by comprising: The puller auxiliary starter comprises the puller auxiliary starter according to any one of claims 1 to 9. The puller auxiliary starter comprises the puller auxiliary starter according to any one of claims 1 to 9.

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